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Beschreibung

The Chemistry inside Spices & Herbs: Research and Development brings comprehensive information about the chemistry of spices and herbs with a focus on recent research in this field. The book is an extensive 2-part collection of 20 chapters contributed by experts in phytochemistry with the aim to give the reader deep knowledge about phytochemical constituents in herbal plants and their benefits. The contents include reviews on the biochemistry and biotechnology of spices and herbs, herbal medicines, biologically active compounds and their role in therapeutics among other topics. Chapters which highlight natural drugs and their role in different diseases and special plants of clinical significance are also included.
Part II continues from the previous part with chapters on the treatment of skin diseases and oral problems. This part focuses on clinically important herbs such as turmeric, fenugreek, ashwagandha (Indian winter cherry), basil, Terminalia chebula (black myrobalan). In terms of phytochemicals, this part presents chapters that cover resveratrol, piperine and circumin.
This book is an ideal resource for scholars (in life sciences, phytomedicine and natural product chemistry) and general readers who want to understand the importance of herbs, spices and traditional medicine in pharmaceutical and clinical research.

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Table of Contents
BENTHAM SCIENCE PUBLISHERS LTD.
End User License Agreement (for non-institutional, personal use)
Usage Rules:
Disclaimer:
Limitation of Liability:
General:
FOREWORD
PREFACE
List of Contributors
Drugs from Natural Sources in the Management of Skin Diseases
Abstract
Introduction
Skin
Skin Infections
Herbs and phytoconstituents for the treatment of skin diseases
Atopic Dermatitis (AD)
Psoriasis Vulgaris
Acne Vulgaris
Skin Pigmentation Disorders
Skin Microbial Infections
Skin Cancer
Conclusion
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENT
References
Turmeric and Curcumin for Arthritis: Evidence for Their Therapeutic Use
Abstract
Introduction
Plant-based Treatment for Arthritis
Turmeric (Curcuma Longa Linn) and Arthritis
Anti-arthritic Effects of Turmeric: Preclinical Studies
Anti-arthritic Effects of Turmeric: Clinical Studies
Mode of Action
Free Radical Scavenging and Antioxidant Activity of Curcumin
Anti-inflammatory Properties of Curcumin
Curcumin Suppresses B Cell-activating Factor
Curcumin Modulates Signal Transduction Pathways
Curcumin Regulates Nuclear Transcription Factors
Curcumin and Matrix Metalloproteinases
Curcumin Stimulates Apoptosis of Synovial Fibroblasts
Conclusion
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENT
References
Curcumin, the Principal Compound of Turmeric (Curcuma Longa Lin) in Oral Health: A Mini-Review
Abstract
Introduction
Curcumin and Gingivitis
Curcumin and Ulcers
Oral Lichen Planus and Curcumin
Candidiasis and Curcumin
Herpes Simplex Virus and Curcumin
Curcumin and Periodontitis
Leukoplakia and Curcumin
Conclusion
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENT
References
Resveratrol in Osteoarthritis: A Memoir
Abstract
Introduction
Pathology
Role of Resveratrol and NF-κβ
Animal Studies on Resveratrol
Human Studies on Resveratrol
Conclusion
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENT
References
Piperine: An Alkaloid from Piper Species with a Wide Range of Therapeutic Properties
Abstract
INTRODUCTION
ISOLATION TECHNIQUES OF PIPERINE FROM PEPPER
Chemistry of Piperine
Pharmacokinetics of Piperine
THERAPEUTIC PROPERTIES OF PIPERINE
Antioxidant Properties
Importance of Antioxidant Potential
Anti-Inflammatory Properties
Anti-diabetic Properties
Neuroprotective Properties
Anti-cancerous Properties
Lung Cancer
Genital Cancers
Prostate Cancer
Cervical and Ovarian Cancer
Cancers of the Gastrointestinal Tract
Breast Cancer
Other Cancer Types
Antimutagenic and Tumor Inhibitory Properties
Other Physiological Properties
Antimicrobial Properties
Bioavailability Enhancing Effect of Piperine
Advantage of Using Piperine as Bioenhancer
Piperine Interactions with Drugs
Proposed Mechanism for Bioenhancing Effect
By Action on Drug Metabolizing Enzyme
By Affecting the Blood Supply to GIT and Membrane Fluidity
By Enhancing Drug Transport
Marketed Product of Piperine as Bioenhancer with Drug
STRUCTURE-ACTIVITY RELATIONSHIP OF PIPERINE AND ITS ANALOGS
TOXICITY DATA RELATED TO PIPERINE
CURRENT DEVELOPMENTS AND FUTURE PERSPECTIVES
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENT
REFERENCES
Fenugreek (Trigonella foenum-graecum L.): A Palatable Spice, An Active Herb, A Promising Functional Food, and Even More
Abstract
INTRODUCTION
TRADITIONAL USAGES
PHYTOCHEMICAL PROPERTIES
BIOLOGICAL PROPERTIES
Antidiabetic Activity
Anticancer Activity
Antioxidant Activity
Anti-inflammatory Activity
Male Sexual Functions
Female Sexual Functions
Anti-malarial Activity
Antidepressant Activity
Respiratory System Effects
Anti-acanthamoeba Activity
Antimicrobial Activity
Miscellaneous Activities
CONCLUDING REMARKS
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENTS
REFERENCES
Clinical Aspects of Ashwagandha
Abstract
Introduction
Recent Research Updates
Conclusion
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENT
References
Phytoconstituents, Biological Properties, and Health Benefits of Basil (Ocimum basilicum L.)
Abstract
INTRODUCTION
Place of Origin (Habitat) and Distribution
Historical Background
Botanical Description and Taxonomical Classification
Culinary and Cosmetic Uses
Traditional Medicinal Uses
PHYTOCHEMICAL COMPOSITION
BIOLOGICAL PROPERTIES
Antioxidant Activity
Anticancer Activity
Antidiabetic Activity
Effects on gastrointestinal disorders- Antihyperlipidemic and Anti-Ulcerative Activity
Hepato-protective Activity
Dermatological and Cosmetic Properties
Anti-inflammatory and Analgesic Activity
Cardioprotective Activity
CNS (Central Nervous System) Activities- Sedative, Hypnotic and Anticonvulsant
Effect on Testicular Toxicity and Fertility
Insecticidal Activity
Antimicrobial Activity
HEALTH-PROMOTING PROPERTIES
Neurocognition
Oral Health and Healing
Skin Health
Anti-inflammatory
Anti-mutagenic
Antiproliferative Activity
MARKET REGIONAL OUTLOOK
CONCLUSION
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENT
REFERENCES
Phytochemistry and Pharmacology of Terminalia chebula: An Update
Abstract
Introduction
Methods
Botany, microscopy, and powder characteristics of Terminalia chebula
Botanical Description, Distribution
Taxonomical /Scientific Classification.
Microscopic Description
Powder Description
Ecology and Distribution
Phytochemical Constituents
Biological and Pharmacological Activities of Terminalia Chebula
Antioxidant Activity
Anti-Ulcerogenic Activity
Antibacterial Activity
Antifungal Activity
Antiviral Activity
Cardio Protective Activity
Cytoprotective Activity
Radio Protective Activity
Antidiabetic Activity
Renoprotective Activity
Anti-Inflammatory Activity
Anti-Cancer Activity
Anti-Typhoid Activity
Anti-Caries Activity
Wound Healing Activity
Anti-Anaphylactic Action
Application of T. Chebula in Cosmetics
Conclusion
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENT
References
Role of Plants in Natural Medicinal Therapy
Abstract
INTRODUCTION
Bioactivity of Herbal Medicine
Current Status of Herbal Medicine
Conservation of Medicinal Plants
CONCLUSION
CONSENT FOR PUBLICATION
CONFLICT OF INTEREST
ACKNOWLEDGEMENTS
REFERENCES
The Chemistry inside Spices & Herbs:
Research and Development
(Volume 2)
Edited by
Pankaj Kumar Chaurasia
P.G. Department of Chemistry, L.S. College, Muzaffarpur, Bihar, India
India
Shashi Lata Bharati
Department of Chemistry, NERIST, Nirjuli, Arunachal Pradesh, India
India

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FOREWORD

The book titled “The Chemistry inside Spices and Herbs: Research and Developments (Volume: 2)” edited by: Dr. Pankaj Kumar Chaurasia and Dr. Shashi Lata Bharati has an excellent collection of 10 chapters written by the experts of their subjects from countries like India, UK, and Turkey. Each chapter of the volume, attractively written by the experts, is also full of research as well as academically momentous information. This book brilliantly deals with biologically valuable information on chemistry and biochemistry of spices and herbs along with in-depth scientific updates on natural drugs for the management of skin diseases, turmeric and curcumin for arthritis, curcumin in oral health, resveratrol in osteoarthritis, and piperine with wide range of therapeutic properties. It also includes the chemistry, biochemistry and pharmaceutical roles of various types of plants like Fenugreek (Trigonella foenum-graecum L.), Ashwagandha, Basil (Ocimum basilicum L.), turmeric (Curcuma longa Lin) and Terminalia chebula.

In the present time of pandemic and other problems, when the whole world is searching for various types of immunity boosters to fight this virus, volume-2 like volume-1 may also be helpful in this direction in order to provide in-depth information because there are also different types of spices, herbs and their constituents discussed in the book which are radiantly useful in the treatment of various human problems and enhancements of immunity. In my view, after giving a thorough look at the contents, this book may be very advantageous for academicians, researchers and scientists working in the field of spices, herbs, their related chemistry, natural medicinal therapy and so on. I am congratulating the editors of the book for creating such a useful, academically as well as a scientifically relevant book by compiling the comprehensive chapters contributed by the experts of various countries. I also strongly recommend this volume for UG and PG students of life sciences, natural chemistry, biochemistry, natural medicinal studies and scientists working in aforesaid areas.

Prof. Gurdip Singh (Retd) Chemistry Department D.D.U. Gorakhpur University, Gorakhpur –273 009, India

PREFACE

Plants are the boon of nature on the earth for us in many ways. They detoxify the environments and save the lives living on this earth. Out of several advantages of plants, their different parts and/or substances are known for their noteworthy medicinal values. Spices and herbs which are involved in our daily routine life are the treasure of good health. Spices, a routine part of the kitchen, as well as herbs of our garden, are full of medicinal virtues and benefits and can be significantly used for the treatment of various disorders and diseases of humans. Spices are actually fruits, seeds, barks, roots and other parts of the plants widely used for enhancing the taste, color and quality of the foods (https://en.wikipedia.org/wiki/Spice) and are the source of various valuable chemical constituents of pharmaceutical significances while herbs are leafy green or flowering parts of the various plants with savory or aromatic properties (https://en.wikipedia.org/wiki/Herb). They are the major source of Ayurveda and other traditional culture of treatments and also have a great potential in the modern time. Spices and culinary herbs and their various chemical constituents involved in the treatment of various problems, diseases and wounds have been beautifully covered in this book.

In the present time of the serious pandemic COVID 19 period, demands of pharmaceutically valuable spices and herbs have been surprisingly enhanced all over the world because they have a substantial and valuable position as nutraceutical which doubtlessly are due to their significant healthy, nutritious and immunity boosting properties. Actually, the main objective of the construction of this book was to collect the more significant valuable researches and information on spices and herbs, which are being widely used in our daily life either in the form of taste enhancing savory materials or quality improving materials or beautiful home decoration and so on. Collection of weighty researches on biologically active pharmaceutically interesting chemical compounds and their compositions and structure activity relationships of these compounds was the second most interesting objective of this book.

This book is full of scientific knowledge on spices, herbs, associated internal chemistry and wide biological performances. It includes biochemistry and biotechnology of spices and herbs, along with the in-depth approach to natural drugs in skin diseases, Fenugreek, Basil, Terminalia chebula, Curcumin, Resveratrol in osteoarthritis, Piperine, Turmeric and Curcumin in Arthritis, Natural Medicinal Therapy, and so on.

This book consists of total ten chapters and each chapter has been written by the various learned experts of their field. Learned experts come from various countries like India, UK, and Turkey. This unique collection of ten chapters may be highly beneficial for the students of graduate and post graduate level studying in the field of life sciences, biotechnology and biochemistry, plant sciences and for researchers and scientists working research in the field of spices, herbs, compounds with biological activity, natural treatment and natural pharmacology. The book is full of updated knowledge, information and recent researches, and without any doubt, it will be very much fruitful for the readers.

Chapter 1, titled “Drugs from Natural Sources in the Management of Skin Diseases” is written by Mandlik and Kulkarni and aims to provide detailed scientific information about the management of skin diseases by using drugs from natural sources.

Chapter 2, titled “Turmeric and Curcumin for Arthritis: Evidence for their therapeutic use” is written by Kudva et al. In this chapter, they compiled the validated observations and discussed their mode of action that confers their beneficial effects.

Chapter 3, titled “Curcumin, the principal compound of turmeric (Curcuma longa Lin) in oral health: a mini review”, is written by Lasrado et al. This article looks into the chemoprotective and immunomodulant roles of curcumin in regards to the oral diseases and proposes the importance of naturally occurring phytochemicals in general health.

Chapter 4, titled “Resveratrol in osteoarthritis: a memoir”, is written by Mathai et al. This memoir looks into the origin, structure and patho-mechanism of resveratrol on its action against osteoarthritis.

Chapter 5, titled “Piperine: An alkaloid from Piper species with a wide range of therapeutic properties”, is written by Singh, S. The present chapter accounts for an overview of therapeutic properties of piperine, the bioactive constituent of pepper. It also focuses on methods used to extract piperine from pepper along with recent approaches for the enhancement of the bioavailability of piperine.

Chapter 6, titled “Fenugreek (Trigonella foenum-graecum L.): A Palatable Spice, An Active Herb, A Promising Functional Food and Even More”, is written by Onder et al. They have comprehensively discussed the plants’ phytochemical content and biological activity.

Chapter 7 titled “Clinical Aspects of Ashwagandha”, concisely describes the various recent clinical aspects and researches on this medicinally valuable herb.

Chapter 8, titled “Phytoconstituents, Biological Properties and Health Benefits of Basil (Ocimum basilicum L.)”, is written by Urvashi et al. This chapter has covered up-to-date information on pharmacological investigations of the herb and its health-related benefits.

Chapter 9, titled “Phytochemistry and Pharmacology of Terminalia chebula: an Update”, is written by Agrawal and Kulkarni. They have given an update on the phytochemistry and pharmacology of T. chebula.

Chapter 10, titled “Role of Plants in Natural Medicinal Therapy”, is written by Mulgund and Bhat. They have discussed the potential and significance of plants for natural pharmacological care.

Pankaj Kumar Chaurasia PG Department of Chemistry, L.S. College, Muzaffarpur, Bihar, India &Shashi Lata Bharati Department of Chemistry, NERIST, Nirjuli, Arunachal Pradesh, India

List of Contributors

Deepa S. MandlikPoona College of Pharmacy, Bharati Vidyapeeth (Deemed to be) University,, Pune-411038, IndiaYogesh A. KulkarniShobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM’s NMIMS, V.L Mehta Road, Vile Parle (W), Mumbai – 400 056, IndiaAvinash Kundadka KudvaDepartment of Biochemistry, Mangalore University, Mangalagangothri, Karnataka 574199, IndiaChethan B. ShettyDepartment of Orthopaedics, Kasturba Medical College, Mangalore, Karnataka, IndiaNaveen Joseph MathaiOrthopaedic Department, Cardiff and Vale University Health Board, Cardiff, UKPrajwal Prabhudev ManeDepartment of Orthopaedics, Kasturba Medical College, Mangalore, Karnataka, IndiaNikku Mathew GeevarugheseDepartment of Orthopaedics, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh 462020, IndiaMangalore Institute of Oncology, Pumpwell, Mangalore, Dakshina Kannada, Karnataka, IndiaSavita LasradoDepartment of ENT, Father Muller Medical College, Kankanady, Mangalore, Karnataka-575002, IndiaSuresh RaoMangalore Institute of Oncology, Pumpwell, Mangalore, Dakshina Kannada, Karnataka, IndiaLal MadathilMangalore Institute of Oncology, Pumpwell, Mangalore, Dakshina Kannada, Karnataka, IndiaPaul SimonMangalore Institute of Oncology, Pumpwell, Mangalore, Dakshina Kannada, Karnataka, IndiaReewen George DSilvaUndergraduate student, Belgaum Institute of Medical Sciences, Belagavi - 590 001. Karnataka, IndiaErrol MorasMBBS student, Kasturba Medical College, Mangalore, Karnataka, IndiaSunita SinghDepartment of Chemistry, Navyug Kanya Mahavidyalaya University of Lucknow, Lucknow, IndiaAlev ONDERDepartment of Pharmacognosy, Faculty of Pharmacy, Ankara University, Tandoğan 06100, Ankara, TurkeyAhsen Sevde CINARDepartment of Pharmacognosy, Faculty of Pharmacy, Ankara University, Tandoğan 06100, Ankara, Turkey Department of Pharmaceutical Botany/ Pharmacognosy, Faculty of Pharmacy Lokman Hekim University, Söğütözü 06510, Ankara, TurkeySerap GURDepartment of Pharmacology, Faculty of Pharmacy, Ankara University, Tandoğan 06100, Ankara, TurkeyPankaj Kumar ChaurasiaP.G. Department of Chemistry, L.S. College (A Constituent Unit of B.R.A. Bihar University), Muzaffarpur-842001, Bihar, IndiaShashi Lata BharatiDepartment of Chemistry, North Eastern Regional Institute of Science and Technology, Nirjuli (Itanagar), Arunachal Pradesh-791109, IndiaSunil KumarDepartment of Chemistry, L.N.T. College (A Constituent Unit of B.R.A. Bihar University), Muzaffarpur-842002, Bihar, IndiaAshutosh ManiDepartment of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj-211004, Uttar Pradesh, IndiaUrvashiDepartment of Chemistry, Punjab Agricultural University, Ludhiana, Punjab, IndiaRamandeep KaurDepartment of Chemistry, Punjab Agricultural University, Ludhiana, Punjab, IndiaJyoti GabaDepartment of Chemistry, Punjab Agricultural University, Ludhiana, Punjab, IndiaOjaskumar D. AgrawalShobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM’s NMIMS, V.L Mehta Road, Vile Parle (W), Mumbai – 400 056, India Vivekanand Education Society’s College of Pharmacy, University of Mumbai, Chembur (East) Mumbai 400 074, IndiaSmita G. BhatP.G. Department of Studies in Botany, Karnatak University, Dharwad, Karnataka, IndiaG. S. MulgundP.G. Department of Studies in Botany, Karnatak University, Dharwad, Karnataka, India

Drugs from Natural Sources in the Management of Skin Diseases

Deepa S. Mandlik1,Yogesh A. Kulkarni2,*
1 Poona College of Pharmacy, Bharati Vidyapeeth (Deemed to be) University, Pune-411038, India
2 Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM’s NMIMS, V. L. Mehta Road, Vile Parle (W), Mumbai- 400056, India

Abstract

The skin or dermis is the largest organ of the human body, having important functions, such as protection and thermoregulation. Skin-related diseases are an important public health concern. A variety of skin diseases like acne, eczema, psoriasis, dermatitis, and skin cancer affect a large group of people throughout the world. The innumerable etiological factors for skin diseases are bacteria, fungi, viruses, and protozoa infections, declining immunity, interaction with allergens, noxious substances, or infected skin of other person's and genetic factors.

Many synthetic drugs in various dosage forms are available in the market to treat these skin conditions, but they are associated with certain drawbacks. The usage of medicinal plants for the management of various diseases is as ancient as mankind. Treatment of different skin diseases with herbs and natural products is an economical and safe option. Many plants like Aloe vera, Azadirachta indica, Curcuma longa, etc., are reported to have significant effects on various skin problems. The present chapter aims to provide detailed scientific information about the management of skin diseases by using drugs from a natural source.

Keywords:Acne vulgaris, Atopic dermatitis, Bio active compounds, Herbal plants, Psoriasis, Skin, Skin cancer, Skin diseases, Skin pigmentation.
*Corresponding author Yogesh A. Kulkarni: Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM’s NMIMS, V. L. Mehta Road, Vile Parle (W), Mumbai- 400056, India; E-mail: [email protected]

Introduction

Skin

The skin comprises three layers; the epidermis, dermis, and subcutaneous fat layer (hypodermis). These layers comprise various kinds of cellular level components bringing about various skin structures displaying diverse functions and different

sorts of light proliferation. The outer layer is called the epidermis and is made out of five sublayers: the stratum corneum (inner layer), stratum granulosum, stratum spinosum, stratum basale, and stratum lucidum. The second layer of skin is the dermis, thicker and composed of collagen and elastic fibers. It also consists of papillary and reticular layers. The third layer is made up of fats [1].

Skin is the largest organ of the human body that covers a major part of the human body. It is continually exposed to dangerous compounds, physical and natural toxins. It gives essential protection against microorganisms, as it acts as a significant barrier between environmental conditions and the body. It is involved in thermoregulation, protection, and a strikingly decent boundary against microbial diseases [2]. Skin is populated by enormous microbes, the vast majority of that is innocuous and beneficial. Cooperative microorganisms possess extensive scope of specialties of the skin and give defence against attack by pathogenic microbes. The microbiota of the skin is linked to the skin site. There is, nonetheless, a harmony between the host and the microorganisms; interruptions in a critical position can bring about skin diseases or infections [3].

Skin Infections

These are brought about by different organisms, including bacteria, fungi, parasites, and protozoa. Skin diseases can occur in any size and area, either in the form of a spot or covering the whole-body surface, as well as entering the circulatory system. Many skin diseases are transmitted by means of individual to individual contact and cause sickness, mortality, and morbidity [4]. As indicated in a study by Patel and Patel concentrating on the North Gujarat district, a significant skin issue was tingling with redness, swelling, and inflammation, and most of the antihistaminic medications are utilised to battle the skin diseases [5]. A few people are at specific risk of skin infections. For instance, individuals with diabetes can have a poor blood supply, particularly in the hands and feet, and the increased sugar in their blood declines the capacity of the body to battle infections. The individuals who are older, infected by human immunodeficiency virus or other immunological issues, and who are experiencing chemotherapy or medicines with different medications that suppress the immune system are at high risk because of the weakened immune system. Skin that is harmed by sunburn, scratching, or other injury is more prone to infection. There are five unique sorts of skin diseases: atopic dermatitis, psoriasis, skin inflammation vulgaris, skin pigmentation, skin microbial contaminations, and skin cancer.

Throughout the years, the prevalence of skin infections has likewise expanded in many parts of the world because of their relationship with human immunodeficiency infection (HIV) and AIDS [6]. Over 8 percent of individuals infected with HIV lead to skin maladies [7]. In many parts of the world, the high occurrence of skin diseases is not viewed as a noteworthy medical issue considering the low degree of seriousness and lethality. Skin diseases present a significant wellbeing concern since they are systematically diagnosed and hard to treat [8]. They significantly affect the quality of life. Skin diseases have been related to expanded pressure, tension, and gloom in individuals, and patients with serious cutaneous skin diseases have expanded suicidality analyses, particularly patients of the youth stage [6]. The human being can suffer from skin disease at any stage in life. Various medications are available in the market to treat these ailments. The motive behind this chapter is to present scientific information on the effects of medicinal plants and bioactive compounds in important skin diseases (Fig. 1 & Table 1).

Fig. (1)) Types of skin diseases.
Table 1Overview of skin diseases with respect to their clinical features and treatments.Skin DiseaseDefinitionClinical FeaturesTreatment/sReferencesAtopic dermatitis(Atopic eczema)Chronic inflammatory skin disease characterised by intense itching and recurrent eczematous lesionsPruritus, eczematous lesions, skin dryness, densely aggregated follicular papules excoriated papulesEmollients, Anti-inflammatory therapy, Topical corticosteroids, Calcineurin inhibitors (Tacrolimus, Pimecrolimus), Phototherapy, Systemic immunosuppressants[9]Pscoriasis vulgaris(Plaque psoriasis)Papulosquamous skin condition characterized by red, scaly papules & plaquesErythematous macules, extend peripherally, to form plaques, dry lesions, sharp demarcated round/ oval plaques with loose silvery-white scalesTopical treatments: Corticosteroids, Calcipotriene, Anthralin, Tazarotene, Tacrolimus, Pimecrolimus Systemic medications: Acitretin Methotrexate, Cyclosporine,[10, 11]Acne vulgarisMost common dermatologic diseases in the domain caused by Propionibacterium acnesScaly red skin (seborrhea), Pinheads (papules), blackheads & whiteheads (comedones), large papules (nodules) & scarring (piples)Benzoyl peroxide, Clindamycin & Erythromycin, Topical retinoid (Tretinoin, Adapalene & Tazarotene), Azelaic acid, Dapsone, Salicylic acid Tetracyclines, Macrolides, Flutamide, Trimethoprim, Spironolactone, Isotretinoin, Minocycline foam[12, 13]Skin pigmentationHyperpigmentation is a common skin condition in which skin produces more melanin Hypopigmentation is a common skin condition in which skin produces less melaninBrown, tan or black spots on the skin with sun overexposure, Large patches of darkened skin, Spots or patches of darkened skin after an inflammatory skin condition (acne or eczema)Hydroquinone, Resorcinols, Kojic acid, Arbutin, Ascorbic acid, Deoxyarbutin, Ellagic acid, Glucosamine, Tunicamycin, Niacinamide, Protease inhibitors, Retinoid, Vitamin E, Sulfhydryl compounds, Hydrocortisone, Glycyrrhetinic acid, Retinoids, Salicylic acid[14]Skin infectiosContagious dermatologic diseases, caused by a variety of microorganisms like bacteria and fungiSkin rashes, dermatitis, psoriasis, acute erythema, vitiligo on burning & deeper woundsAntifungal azoles (Imidazoles&Triazoles), Antidermatophytic agents (Griseofulvin, Terbinafine & Lufenuron), Cephalosporins, Vancomycin, Linezolid[15]Skin cancerFatal disease & important public health problem throughout the world that grouped into melanoma & non-melanomaShiny pink, red, pearly bump, uneven edges of lesions, unusual color of spot, changing size, color, or shape of a moleChemotherapy (Cisplatin, Cyclophosphamide), Immune modulators, Monoclonal antibodies, Cetuximab & Panitumumab, Radiotherapy, Topical agent (Piroxicam, Mebutate, Potassium dobesilate, Ingenolmebutate, Imiquimod, 5-Flourouracil, Betulinin acid, Resiquimod, Calcium, obesilate & Topical retinoids), Ionizing radiations[16, 17]

Herbs and phytoconstituents for the treatment of skin diseases

Medicinal plants contribute fundamentally to the prime well-being of the world population, and they have been utilized by the rural population for a considerable length of time for the treatment of various illnesses, including skin illnesses [8]. Moreover, the utilization of herbal medications to treat animal maladies is far-reaching among provincial individuals, most presumably attributable to accessibility and cost-effectiveness [18]. In routine medication, diverse procedures are used to prepare herbal preparations. For instance, crushing the herb’s parts to a fine powder and making a paste is the utmost widely recognized remedy for the management of various kinds of skin infections [19]. The herbs and phytoconstituents have been routinely utilized as drugs since the old time [20]. Researchers have increased enthusiasm for phytochemicals, which led to the systematic studies of different bioactive constituents [21]. Herbs and phytoconstituents have been reported to suppress various signalling pathways involved in the process of inflammation [22]. They also have the capability to suppress the catalytic action of several protein kinases that are identified to activate MAP kinase and NF-қB pathway for indication of inflammatory reactions in a variety of illnesses [23].

Atopic Dermatitis (AD)

Atopic dermatitis is a type of skin inflammation. Various etiological factors such as genetics, immune system, and ecological exposures have been supposed to play a significant role in the development of AD [24]. AD is a long-lasting, incurable immunological illness, described by lapsing progression. In spite of the fact that the etiology of AD has not been completely understood, both hereditary and ecological components are accepted to add to the fundamental pathogenic system, bringing about unevenness between the Th1 and Th2 cytokines. In AD, elevated expression of cytokines released from activated Th2 cells such as interleukin (IL)-4, IL-5, and IL-13 stimulate host hypersensitive reaction, eventually upregulating the B cell production of IgE. Alternately, serum levels of Th1 related cytokines, such as IL-2 and interferon-gamma, are essentially diminished [25]. Furthermore, serologically, AD is described by elevated eosinophils and immunoglobulin E levels. Such an increase in eosinophil numbers intensifies manifestations of AD and result in an expansion of eosinophilic infiltration into the skin dermis six hours after peak levels. Almost after one or two days, these cells cause secretion of eosinophil cationic protein, which stimulates the gathering of further immune cells into the dermis region of skin and finally leads to the formation of new lesions [26]. The distinctive increment in the serum IgE expression is recognized to show infection as well as responsible for the pathogenesis of AD [27]. Topical steroidal medications are generally used for the treatment of mild to serious AD; however, chronic utilization of steroids at a higher amount is linked to various side effects. Medicinal plants are generally utilized in the treatment of AD because of their less toxicity and cost (Tables 2 & 3) [28].

Table 2Medicinal plants in the management of AD.Scientific Name of the Plant & FamilyNature of ExtractAD Inducing AgentMechanism of ActionReferencesCinnamomum cassia,LauraceaeEthanolHDM antigenReduce IgE, histamine, pro-inflammatory cytokines & TARC mRNA expressions[29]Morus alba,MoraceaeEthanolBiostir-ADDecrease PGE2 &NO production; suppress IgE, TARC & histamine levels[30]Angelicaedahuricae,ApiaceaeWaterDNCBReduce pro-inflammatory cytokines levels, decrease inflammatory cells, mast cells & CD4+ cells[31]Tribulus terrestris,‎ZygophyllaceaeEthanolOxazoloneReduce transepidermal water loss (TEWL), Orai-1 & TRPV3 activation, inhibit inflammatory cell[32]Artemisia scoparia,AsteraceaeButanolDNFBInhibit TSLP, histamine, IgE, pro-inflammatory cytokines levels & suppress caspase-1[33]Pseudostellaria heterophylla,CaryophyllaceaeWaterDNCBSuppress mast cells, IgE, pro-inflammatory cytokines, MAPKs & NF-κB expression[34]Rheum tanguticum, PolygonaceaeEthanolHaptenDecrease WBC, IgE& 5-LOX levels[35]Cervus nippon,CervidaeWaterDNCBReduce mast cells, CD4+T, downregulate IgE, pro-inflammatory cytokines levels[36]Amomum xanthioides,ZingiberaceaeWaterDNCBReduce IgE, CCL-17, CCL22, pro-inflammatory cytokines levels[37]Cynanchumatratum,ApocynaceaeWaterDNCBAmeliorate total IgE; reduce mast cell & pro-inflammatory cytokines levels[38]Betula platyphylla, BetulaceaeAqueousPicryl chlorideSuppresses T-helper 2 cell response & serum IgE level[39]Saussurealappa,AsteraceaeMethanolBiostir-ADDownregulate MDC, IL-8, IgE, TARC, RANTES, histamine & TARC levels[40]Scutellariae radix,LamiaceaeAqueousEnvironmental stimuliDecrease IL-5 expression[41]Panax ginseng,AraliaceaeWaterTNCBDecrease IFN-γ, TNF-α, IgE, substance P, TSLP & TNF-α levels[42]Bambusae caulis,PoaceaeBamboo stem2,4-DNFBSuppression of IgE, IL-4, IL-13 & TNF-α levels[43]Actinidia argute,ActinidiaceaeWaterDNCBDecrease inflammatory cells, lymphocyte, elevate Treg-related & Foxp3 expression[44]Broussonetia kazinoki,MoraceaeEthanolD. farinaReduce IgE, IL-4 & skin mast cells levels[45]Schizandra chinensis,SchisandraceaeWaterDNCBInhibit histamine, IgE, IgM, mast cell, IL-4, IL-5 expression[46]Artemisia argyi,AsteraceaeEthanolDNCBReduce IgE, histamine, pro-inflammatory cytokines; Inhibit IκBα & PI3K/Akt phosphorylation[47]
Table 3Phytochemicals in the management of ADName of PhytoconstituentPlant SourceAD Inducing AgentMechanism of ActionReferencesChlorogenic acidArtemisia capilliarisD. farinaInhibit histamine & NO, Reduce histamine, IgE& levels[48]GintoninPanax ginsengDNFBInhibit microglial activation & reduce IL-4, IgE, histamine, INF-γ levels[49]DecursinAngelica sinensisDNCBReduce pro-inflammatory cytokines, NF-κB, IgE, MAPKs levels[50]Cordycepic acidCordyceps sinensisDNFBInhibit IL-4, INF-γ, histamine &IgE[51]ErgosterolPoria cocosDNCBIncrease aryl hydrocarbon receptor expression[52]CrocinGardenia jasminoidesD. farinaInhibit activation of IL-4, IL-13, STAT6 & NF-κB[53]GeniposideGardenia jasminoidesD. farinaReduce INF-γ, IgE, histamine, mast cells, IL-4, IL-6 & TNF-α levels[53]ChrysophanolRumex crispusCordyceps militarisDNFBReduce histamine, IgE, TSLP, ICAM-1, IL-4, IL-6 & TNF-α, MIP-2[54]Daidzein, GenisteinGlycine max MerrD. farinaReduce IL-12, TNF-α, IL-4, PKC, MMP-9, IL-4, substance P, iNOS & p-IκB levels[55]Liquiritigenin, LiquritinCoptidisRhizomaGlycyrrhiza uralensisDNFBInhibit Substance P, MMP-9; reduce COX-2, TNF-α, p-IκB, iNOS & levels[56]MomordinKochia scopariaDNCBReduce expression of NF-κB, IL-1β, TNF-α & MAPKs[57]Forsythiaside, Phillyrin, Phylligenin, PinoresinolForsythia suspensaD. farinaReduce VCAM-1, ICAM-1, IgE, histamine, mast cell, TARC, MDC, RANTES, IL-4 levels[58]Gallic acidCortex MoutanOXASuppress pro-inflammatory cytokine, CCL7 & CCL8[59]OregoninAlnus japonicaBiostir ADDecrease the eosinophil count; Reduce IgE, IL-4, IL-5, IL-13 levels[60]GinsenosideRh2 Ginsenoside Rg3Panax ginsengDNCBInhibit TARC, TAR, TSLP, IL-4, IL-10, IL-6, TNF-α & MAPKs[61, 62]IndirubinPolygonum tinctoriumDNFBInhibit TSLP, IgE, IL-4, IL-6, caspase-1 & histamine levels[63]LancerinPolygala tenuifoliaTrimellitic anhydrideReduce IgE& histamine levels, Inhibit degranulation of tryptase, HMC-1 cells & PKA[64]NaringinDrynaria fortuneD. farinaDecrease IgG, IgE, IL-4, IL-6 & TNF-α expressions[65]β-pineneAlpinia intermediaHDMInhibit mast cell & TLSP expression[66]RutinBroussonetia kazinokiD. farinaInhibit TARC, MDC & RANTES production; Reduce IgE, IL-4, IL-5, IL-13[67]Linolenic acidCoriandrum sativumDNCBReduce Th-1 & Th2-mediated cytokines[68]ValenceneCyperus rotundusDNCBInhibit TARC, GM-CSF & I-CAM levels; Reduce IgE, IL-1β, IL-6, IL-13 levels[69]PolysaccharideEricerus pelaDNCBDecrease IgE& mast cell; Inhibit Th1, Th17 activation, IL-6, IL-17A & INF-γ[70]QuercetinDendrobium tosaenseTNCBUpregulate INF-γ; Downregulate IgG, IL-4 &IgE,[71]7, 8, 4′-trihydroxyisoflavoneGlycine maxDNCBDecrease eosinophils count, lower pro-inflammatory cytokines levels[72]Ziyuglycoside ISanguisorba officinalisDNCBReduce IgE& β-HEX levels[73]CupressuflavoneJuniperus rigidaOXA/DNCBInhibit IL-4, IgE& β-hexosaminidase release[74]

Psoriasis Vulgaris

Psoriasis vulgaris is a typical skin problem linked to the development of inflamed and elevated lesions that continually shed scales developed from the extra progression of skin epithelial cells [75]. It is a common condition worldwide with an incidence rate of 3% [76]. Initially, it was identified as a disease of epidermal keratinocytes, but now it is considered an immune-mediated disease [77]. It is characterized by a progression of connected cell alterations in the skin, an increase in the size of epidermal keratinocytes, ectasia, gathering of neutrophils, T lymphocytes, and leucocytes in the affected dermis region [75]. Around 33% of individuals with psoriasis have a family history of the disease. Physical injury, occasional environmental changes, short-term infections, and a few drugs like lithium and β-blockers are known to trigger the disease condition. A couple of observational investigations have connected psoriasis with distressing life events and with lifestyle containing cigarette smoking and alcohol consumption. Others have discovered a relationship between psoriasis and body mass index with a low intake of fruits and vegetables. The disease has a multifaceted mechanism involving hereditary nature and cellular structures. Therapeutics for this condition are exceptionally assorted, acting on various targets, changing from symptomatic treatment of lessening inflammation to improving the immune system of the body. Leukotrienes are considered as the main player in inflammation, and 5-lipoxygenase is a key enzyme for the synthesis of the leukotrienes; therefore, drugs with 5-lipoxygenase inhibitory activity are important in the treatment of psoriasis [78]. Due to the impact on the quality of life of patients and adverse reactions of synthetic drugs, the drugs from natural sources are being continuously explored for the management of this condition (Tables 4 & 5).

Table 4Medicinal plants studied for the management of psoriasis.Scientific Name of the Plant & FamilyNature of ExtractPlant PartAnimal Model(Preclinical/Clinical)Mechanism of ActionReferencesSaccharum officinarum,GraminaeWax oil-Albino mice tail test-[79]Angelica dahurica,ApiaceaeAqueousRootsClinical trialAccelerates breakdown of psoriatic cells[80]Betula alleghaniensis,BetulaceaePolyphenolicBarkMTT & TBDE-[81]Piceamariana,PinaceaePolyphenolicBarkMTT & TBDE-[81]Alpinia galangal,ZingiberaceaeEthanolRhizomeHaCaTInhibit CSF-1 & NF-қB expression[82]Annona squamosal,AnnonaceaeEthanolLeafHaCaTDecrease CD40 & NF-kB expression[82]Curcuma longa,ZingiberaceaeEthanolRhizomeHaCaTReduce CSF-1, IL-8 & NF-қB expression[82]Caesalpinia bonduc,CaesalpiniaceaeHydro-alcoholicLeavesHaCaT Mouse tail test-[83]Pinus maritime,PinaceaeAqueousBarkHaCaTReduction of ICAM-1 expression[84]Celastrus orbiculatus,Celastraceae-CrudeHaCaTInitiation of apoptosis[85]Aloe vera,LiliaceaeAqueousLeavesClinical trial-[86]Centella asiatica,ApiaceaeAqueousAerial partsSVK-14Inhibition of keratinocyte replication[87]Coptis chinensis, RanunculaceaeEthanolicRhizomesHaCaT-[88]Rubia cordifolia,RubiaceaeEthanolicRootsHaCaTNeutrophilic PAF receptor antagonism[88]Eruca sativa,BrassicaceaeAqueousSeedsKeratinocytes & THP-1 Monocytes-[89]Tabebuia avellanedae,BignoniaceaeHerbal teaBarkHaCaT-[90]Mahonia aquifolium,BerberidaceaeAqueousFruitsClinical trial-[91]Panax ginseng,AraliaceaeAqueousRootsOxazolone mouse ear modelRegulation of COX-2, IL-4 & interferon-γ[92]Thespesia populnea,MalvaceaeButanolic, Pet etherBarkPerry’s scientific mouse tail model-[93]
Table 5Natural products studied for the management of psoriasis.PhytoconstituentSourceAnimal Model (Preclinical/Clinical)Mechanism of ActionReferencesCurcuminCurcuma longa,ZingiberaceaeClinical trialSelective phosphorylase kinase inhibitor[94]HypericinHypericum perforatum,HypericaceaeMouse epithelial testReduces erythema, erosions & desquamation[95]CamptothecinCamptothecaacuminata,NyssaceaeMouse vaginal epithelium & tail epidermisInhibiting proliferation & inducing differentiation[96]KoumineGelsemium elegans,LoganiaceaeMouse vaginal epithelium &tail epidermisInhibit epidermal cell proliferation & decrease IL-2[97]ArtesunateArtemisia annua,AsteraceaeHaCaTRegulating CXCR2 expression & enhancing TGF β1 secretion[98]CapsaicinCapsicum annuum,SolanaceaeClinical trial-[99]ColchicineColchicum autumnale,ColchicaceaeClinical trialAnti-chemotactic activity[100]QuercetinSmilax china,SmilacaceaeMouse tail modelDecrease epidermal thickness & inhibit leukocyte migration[101]Fumaric acidFumaria officinalis,FumariaceaeClinical trialInhibition of T cell activity[102]PodophyllotoxinPodophyllum peltatum,BerberidaceaeClinical trial-[103]PsoralenPsoralea corylifolia, FabaceaeClinical trialInhibition of epidermal DNA synthesis & control cell division[104]EmbelinEmbeliaribes,MyrsinaceaeTPA induced ear edemaInhibition of IL-1β, TNF-α & block leukocyte accumulation[105]iso-CamptothecinCamptotheca acuminata,NyssaceaeHaCaTInhibit keratinocyte proliferation & induce apoptosis[106]CannabinoidsCannabis sativa,CannabaceaeHaCaT-[107]GossypolGossypium species,MalvaceaeHPV-16Antiproliferative & antioxidant activity[108]IsoquinolineArgemone species,PapaveraceaeClinical trial-[109]

Acne Vulgaris

Acne, as a group of skin diseases, is one of the most predominant dermatological infections. Generally, everyone faces this problem during their lifetime [110]. Even though it is not a dangerous disease, it influences the person’s quality of life by putting mental pressure by creating patches on the face, chest, and back side body [111]. In youngsters and adolescents, the incidence of acne is about 70% [112]. The pathophysiology of Acne vulgaris is very complicated; however, reliant on main components such as androgen-prompted activation of sebaceous glands, hyperkeratinization of follicles, grouping, and exacerbation of the Propioni bacterium acnes bacterium [113]. The gathering of sebum and damaged skin cells inside the sebaceous gland follicle upgrades the microbial burden that breaks down the follicular barrier bringing about the skin inflammatory condition known as acne. Sebum development and hormonal shifts are the endogenous variables, though the variation in the action of the skin microflora is an utmost significant contributor to the acne pathophysiology. The microbial flora derived from acne patients that are likely to contribute to acne pathogenesis include P. acnes, S. aureus, S. epidermidis, Streptococcus, K. pneumoniae, Enterobacter, etc [114]. Acne usually impacts skin with a higher amount of oil glands which induces acne, papules, skin infections, and hyperpigmentation. Scientific reports suggest that acne has a hereditary, hormonal, psychological, and contagious history [115]. Acne occurs because of follicular blockage, hyperkeratinisation, keratin plug development, and sebum buildup (microcomdo). Sebaceous glands are expanded with increased action of androgen, which is linked to increased sebum production. The high sebum levels triggered by androgen induce the multiplication of P. acnes in the sebaceous gland and lead to an inflammatory reaction with the liberation of the inflammatory cytokines such as tumor necrosis factor α, IL-8, IL-1β, granulocyte-macrophage colony-stimulating factor, and accumulation of complement [116]. Furthermore, P. acnes, S. epidermidis, and P. ovale are the major causative microorganism present in acne lesions [117]. Acne has 3 types: nodular, comedonal, and papulopustular. Comedonal is not inflammatory, while the inflammatory forms are nodular and papulopustular [118]. The microcomedo can be enlarged to form an open comedo or a closed comedo. Comedones exist when sebaceous glands are clogged with sebum, oil, and dead skin cells [119]. S. epidermidis and Propionibacterium have been described as bacteria that initiate the inflammation in the acne lesions [120]. There are several drugs available for the treatment of Acne vulgaris, such as oral antibiotics, topical, oral retinoids, and oral hormonal treatments. Considering protection from existing microbial operators, reactions, and some of the time significant expense of treatments for the condition, interest in herbs has been increased (Tables 6 & 7) [121].

Table 6Effect of medicinal plants in Acne (In-vitro studies).Scientific Name of Plant & FamilyExtractPlant PartActive CompoundActivityReferencesAbies koreana, PinaceaeAqueousLeavesLimonene, Essential oil Bornyl acetateAnti-bacterial & anti-inflammatory[122]Magnolia sp., Magnoliaceae-Stem barkHonokiol, Phenols, MagnololAnti-bacterial & anti-inflammatory[123]Aralia continentalis, AraliaceaeMethanolRootDiterpene acidAnti-inflammatory[124]Impatiens balsamina, BalsaminaceaeEthanolAerial partsBisnaphthquione derivativeTestosterone 5α-reductase inhibitory[125]Cassia tora,FabaceaeAqueousSeedSaponins, Glycosides, FlavonoidsAnti-bacterial[126]Calendula officinalis, AsteraceaeAqueousFlowersFlavanoids, Glycosides, Saponins, TerpenesAnti-bacterial[126]Garcinia mangostana, GuttiferaeEthanolFruitsXanthone, Phenols, Tannin, FlavonoidAnti-oxidant & anti-bacterial[127]Eucalyptus maculate, MyrtaceaeMethanol-dichloromethaneLeaves8-desmethyleucalyptin, EucalyptinAnti-bacterial[128]Camellia sinensis, TheaceaeAqueousLeavesUronic acidsAnti-bacterial[129]Humulus lupulus, CannabaceaeCO2 Extract-Lupulones, Prenylfalvonoid, HumulonesAnti-oxidant & Anti-bacterial[130]Eucalyptus viminalis, MyrtaceaeMethanol-dichloromethaneLeaves-Anti-bacterial[128]Clerodendrum trichotomum, LamiaceaeMethanolLeavesPenylpropanoid glycosides, ActeosideAnti-inflammatory[131]Coptis chinensis, RanunculaceaeAqueousRhizomeAlkaloidAnti-inflammatory[132]Backhousia citriodora,MyrtaceaeEssential oil-Geranial, Neral, Iso-citral& Trans-citralAnti-bacterial[133]Ilex paraguariensis, AquifoliaceaeMethanol,Leaves-Anti-bacterial & anti-inflammatory[134]Eupatorium odoratum, AsteraceaeEthanolLeaves-Anti-oxidant[135]Anthemis aciphylla,AsteraceaeAqueousAerial, leaves, flowersEssential oil A-pinene terpinen-4-olAnti-bacterial[136]Garcinia mangostana, GuttiferaeEthanolWhole partsXanthone derivativeAnti-bacterial[137]Ocimum basilicum, LamiaceaeSweet basil oils-α-bergamotene, Methyl chavicolAnti-bacterial[138]Peperomia pellucida, PiperaceaePet etherMethanolPhenolsAnti-oxidant[139]Lygodium japonicum,LygodiaceaeWaterWhole partsPhenolAnti-oxidant & anti-microbial[140]Phyllanthus emblica, PhyllanthaceaeMethanolFruitTannin, PhenolAnti-oxidant[141]Mahonia aquifolium,BerberidaceaeCrudeStem barkAlkaloidAnti-bacterial[142]Momordica charantia, CucurbitaceaeAqueousSeedFlavonoids, Alkaloids, Triterpenes, TanninsAnti-bacterial[126]Rhinacanthus nasutus, AcanthaceaeEthanolLeavesNaphthoquinoneAnti-bacterial[143]Ocimum sanctum, LamiaceaeHoly basil oils-Eugenol, Methyl eugenolAnti-bacterial[138]Terminalia arjuna, CombretaceaeAcetoneStem barkFlavonoid, TanninAnti-bacterial[144]Senna alata,FabaceaeChloroform, MethanolWhole parts-Anti-bacterial[137]Prumnopitys andina, PodocarpaceaeMethanol fractionStem barkAbietane diterpeneAnti-bacterial[145]Punica granatum, LythraceaeMethanolFruitsEllagic acidAnti-bacterial & anti-inflammatory[146]Rosa multiflora Thumb., RosaceaeEthanolFruitsUnsaturated fatty acidAnti-bacterial[134]Rabdosiarosthornii,LamiaceaeEtherLeavesDiterpenoidAnti-bacterial[147]
Table 7Effect of medicinal plants in Acne (In-vivo studies).Plant and FamilyExtractPlant PartActive ConstituentActivityReferencesVitex negundo, VerbenaceaeWaterLeaves-Anti-inflammatory[148]Aralia continentalis, AraliaceaeMethanolRootDiterpene acidAnti-inflammatory[124]Scutellaria baicalensis, LamiaceaeMethanolRadixFlavonoidAnti-inflammatory[149]Peperomia pellucida, PiperaceaePet ether, MethanolWhole plantPhenolsAnti-inflammatory[139]Rosmarinus officinalisLamiaceae-LeavesEssential oilAnti-bacterical[150]

Skin Pigmentation Disorders

Human pigmentation differs greatly as compared to other organisms and depends on cultural, genetic, and physiological origin. Several skin disorders that involve dyspigmentation impair the physical look, and therefore have an immense psychological effect on patients. Pigmentary disorders can be divided into two main types: hyperpigmentation and hypopigmentation, which can be localized or generalized. Hyperpigmentation in which excess pigment is synthesized, and hypopigmentation is the condition in which pigment synthesis is reduced. General pigment conditions are underlying hereditary conditions (albinism), autoimmune conditions (vitiligo), or conditions such as haemochromatosis and endocrine disorders includes Addison's disease, Cushing’s disease, hypothyroidism, and hyperthyroidism. Moreover, suntan is the most frequent source of widespread hyperpigmentation (at skin exposed to sun). Generalized hypopigmentation is typically the product of hereditary causes, which may be ethnic or may represent a skin melanization congenital disorder. Oculocutaneous albinism is the most severe hereditary source of skin, eyes, and hair hypopigmentation [151]. Melanin pigment is necessary to shield human skin from radiation; however, aggregation of excessive melanin causes pigmentation defects such as ephelides, melasma, freckles, and senile lentigines [152]. Melanin is the pigment that gives the skin its colour. Specific skin disorders lead to impairment of melanin synthesis and destroy melanocytes (melanin-producing cells). Melanogenesis takes place in melanocytes situated in the epidermis basal layer [153]. The process of melanogenesis can be regulated in several steps, comprising inhibition of gene expression of tyrosinase and specifically inactivating the enzyme [154]. The melanogenesis process is activated by a tyrosinase enzyme when the skin is exposed to ultraviolet radiation. Tyrosinase is a multifunctional copper consisting enzyme in vertebrates and fungi, catalyzing the primary phase of melanin formation from tyrosine. Tyrosinase inhibitors are also the most important non-invasive option for the management of skin pigmentation [155]. Undesired pigmentation of the skin induced by pathophysiological or environmental factors has triggered scanning for appropriate natural and chemical agents that reduce skin pigmentation [156]. Usage of current depigmenting agents is very restricted due to high toxicity, less stability, inadequate skin penetration, and inadequate action [157]. Synthetic drugs frequently result in skin inflammation, inadequate penetration, or clinical efficacy. So, there is an unmet need to find new drugs for this condition [158]. The use of medicinal plants and herbal ingredients in skin diseases and pigmentation disruption management is a popular part of many traditional medicines [159]. Due to their safety and efficacy, great efforts have been taken into isolating bioactive chemicals from traditional medicinal plants (Tables 8 & 9) [160].

Table 8The effect of medicinal plants on Skin pigmentation.Scientific Name of PlantFamilyPart UsedExtractEffectReferencesAlpinia officinarumZingiberaceaeRhizomeAqueous acetoneAnti-tyrosinase activity. Decrease in TPR-1 & 2[161]Nardostachys chinensisCaprifoliaceaeRoot & RhizomeMethanolAnti-tyrosinase activity; Decrease in Tyrosinase-related protein (TPR)-1[162]Panax ginsengAraliaceaeRootEthyl acetateAnti-tyrosinase activity Reduction of ROS[163]Rheum rhabarbarumPolygonaceaeRhizomeMethanolDecrease in tyrosinase, tyrosine kinase activity, IL-1α, TNF-α[164]Cornus officinalis‎CornaceaeFruitMethanolIncrease in tyrosinase activity, TRP-1 & 2[165]Camellia sinensisTheaceaeLeavesWaterReductin of melanin content[166]Withania somniferaSolanaceaeRootEthanolDecrease in tyrosinase activity[167]Curcuma comosaZingiberaceaeRhizomeMethanol-[168]Cassia fistulaFabaceaePodsMethanolTyrosinase inhibitory effect[169]Tribulus terrestrisZygophyllaceaeFruitWaterActivate melanocytes & tyrosinase at high conc. & inhibit at low conc.[170]Thymus vulgarisLamiaceaeWhole plantEthanolAnti-melanogenic activity[171]EcliptaprostrataAsteraceaeAerialWaterIncrease in tyrosinase activity & melanocyte migration[172]Zea mayGramineaeCorn branEthanolSuppress melanin synthesis[173]Paeonia lactifloraPaeoniaceaeRoot-Reductin of melanin content[174]Hippophae rhamnoidesElaeagnaceaeBerriesMethanolMelanin content reduction[169]Vitis vinifera‎VitaceaeSeedsAqueous ethanolMelanin content reduction[175]Gaillardia aristataAsteraceaeFlowersEthanolAnti-tyrosinase activity & reduced melanin content[176]Pueraria tunbergianaFabaceaeAerial partsAqueous ethanolSuppress melanogenesis process[177]Hizikia fusiformisSargassaceaeWhole plantWaterSuppression of melanin production[178]Gaillardia aristataAsteraceaeFlowersEthanolAnti-tyrosinase activity[176]Lonicera japonica‎CaprifoliaceaeWhole plantEthanolAnti-tyrosinase activity & reduce melanin content, TRP-1& 2[179]
Table 9The effect of phytoconstituents on Skin pigmentation.Name of PhytoconstituentSource & FamilyPlant part & ExtractMechanism of ActionReferencesBiochanin ATrifolium pretense,AsteraceaeLeaf & Stem MethanolDeccrease in Tyrosinase activity[180]WogoninScutellariabaicalensis,LamiaceaeRoot Ethanol & MethanolDecrease in SOX9 &Melanophilin[181]BaicalinScutellariabaicalensis,LamiaceaeRootDecraese in reactive oxygen species[182]EupafolinPhyla nodiflora,VerbenaceaeAerial MethanolDeccrease in Melanocyte Inducing Transcription Factor (MITF)[183]Quercetin-3-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosideDiospyros kaki,EbenaceaeCalyx Aqueous & AcetoneAnti-tyrosinase activity & reduce melanin content, TRP-1 & 2[184]BavachinPsoralea corylifolia,FabaceaeFruitDeccrease in Tyrosinase activity[185]4-(3,4-dihydroxybenzoyloxymethyl) phenyl-O-β-D-glucopyranosideOriganum vulgareLamiaceaeAerial EthanolDecrease in tyrosinase activity & TRP-1& 2, MITF[186]IsoliquiritigeninGlycyrrhiza uralensis,FabaceaeRoot RhizomeIncrease in tyrosinase activity & Reactive oxygen species[187]BakuchiolPiper longum,PiperaceaeFruit EthanolDecrease in tyrosinase activity &MITF[188]Oligopin CosmythicPinus pinaster,PinaceaePine barkAnti-melanogenesis activity[189]PaeonolPaeonia suffruticosa,PaeoniaceaeRoot & CortexDecrease in tyrosinase activity[190]Gomisin NSchisandra chinensis,SchisandraceaeFruitDecrease in tyrosinase activity & TRP- 1& 2, MITF[191]Protocatechuic acidOriganum vulgare, LamiaceaeAerial EthanolDecrease in tyrosinase activity & TRP-1& 2, MITF[192]1-O-methyl-fructofuranoseSchisandra chinensis,SchisandraceaeFruit Chloroform, MethanolDecrease in tyrosinase activity & TRP-2, MITF[193]Kadsuralignan FKennedia coccinea,FabaceaeRoot EthanolDeccrease in Tyrosinase activity[194]Trans-Caffeic acid stearyl esterPaeonia suffruticos,PaeoniaceaeRootDecrease in tyrosinase activity & TRP-1 & 2, MITF[195]2,5-DihydroxyacetophenoneClerodendrumbungei,‎LamiaceaeRoot EthanolDecrases in tyrosinase activity[196]tetrahydroxystilbene-2-O-beta-D-glucosidePolygonatum multiflorumAsparagaceaeRootIncrease in MITF activity[197]GeniposideGardenia jasminoides,RubiaceaeFruitIncrease in extracellular signal regulated kinase[198]FloralginsenosidePanax ginseng,AraliaceaeFruit MethanolDecrease in tyrosinase activity & MITF[199]OriganosideOriganum vulgare,LamiaceaeAerial partsInhibit tyrosinase activity[200]Ginsenosides p-coumaric acidPanax ginseng,AraliaceaeRhizomesAnti-melanogenesis activity[201]Saponified oilOenothera biennis,Onagraceae-Inhibit melanin synthesis[202]γ-OryzanolOryza sativa,Gramineae-Inhibit melanin synthesis[203]PaeonolPaeonia suffruticosa,PaeoniaceaeRoot cortexInhibit tyrosinase activity & reduction in melanin content[204]RengyoloneEuryaemarginata,TheaceaeRoot MethanolInhibit melanin synthesis & melanogenesis process[72]Protocatechuic AcidPyrus pyrifolia,RosaceaeFruit EthanolDeccrease in MITF[205]Salidroside PaeonolRhodiola rosea, Crassulaceae-Anti-tyrosinase activity[204]HydroquinoneVaccinium microcarpum,Ericaceae-Inhibits melanin synthesis[206]GlabridinGlycyrrhiza glabra,FabaceaeRhizomesPotent tyrosinase inhibitor[207]
)

Skin Microbial Infections

A variety of micro-organisms, including bacteria, fungi, viruses, and protozoa, cause skin infections. Infections of the skin can occur in different sizes and sites, starting from a spot to all over the surface of the body, and it can be transferred to the blood. Several skin diseases are spread by intimate interaction and are causing severe life-threatening illness, mortality, and morbidity worldwide [4]. Moreover, when the skin is damaged (by means of injury or some internal or external factors), several distinctive diseases will occur, either inflammatory or non-inflammatory, ranging from erythema, dermatitis, skin rashes, wounds, psoriasis, and vitiligo to burns [208]. The defensive capability of skin can even be weakened in immunocompromised patients with asthma and AIDS. Patients on chemotherapy, glucocorticoids, or systemic antibiotics treatment are more prone to fungal infections of the skin. The search for alternative treatment options in various populations is slowly becoming an essential part of the basic healthcare system [209]. The robust existence of skin disorders and socio-economic facets, congested lifestyles, co-housing with pets, and insufficient availability of water also play a crucial part in the occurrence of skin disorders and the hitches in their diagnosis and management [210]. The additional concerning aspect of skin diseases is the influence from industrial sources. It is estimated that the incidence of skin disorders is as high as 34 percent of all workplace diseases in the globe [211]. Industrial skin conditions are typically correlated with chronic contact with chemicals, water, and Sun. Personnel working in different companies may face the problem of skin infections like eczema, sunburn, hives or skin carcinoma [212]. Bacteria that can cause skin infections include Staphylococci and Streptococci (impetigo and open wound infections), Mycobacterium leprae (leprosy), Propionibacterium acnesium (cellulitis), Pseudomonas aeruginosa (furunculosis), Pasteurella multocida (cellulitis), Corynebacterium diphtheria (erythrasm), and Bartonella henselae (cellulitis) [213]. The yeasts and dermatophytes are common skin-associated fungal infections. Dermatophytosis is a scalp, nail, and skin infection of keratinized tissue, generally identified as ringworm, which is called onychomycosis when infected with the nails of fingers. Candidiasis is the fungal infection of the skin mucous layer caused by Candida albicans which often occurs in patients with immunosuppression and diabetes [213]. The skin loses its defensive epithelial covering as burns occur, and after C. albicans forms part of the opportunistic skin flora, and the lesions can become vulnerable to yeast infection [214]. Skin infections can arise during human life, from infant to death, and there are several ointments and prescription medications available in the market to treat such diseases, although they also have certain disadvantages. Many medicinal plants have been scientifically studied for their effects on skin infections (Tables 10 &11).

Table 10The effect of medicinal plants on skin infections.Botanical NameFamilyParts UsedTopical ApplicationsReferencesArtemisia afraAsteraceaeLeavesAcne & boils[215]Aristea eckloniiIridaceaeWhole plantShingles[216]Celosia trigynaAmaranthaceaeLeavesBoils[217]AthrixiaphylicoidesAsteraceaeWhole plantBoils[218]BoophanedistichaAmaryllidaceaeBulbsBoils[219]Centella asiaticaApiaceaeLeavesLeprosy & acne[220]Achyranthes asperaAmarantheceaeRootsBoils[221]Cotyledon orbiculataCrassulaceaeLeaf & leaf juiceBoils[222]Cinnamomum camphoraLauraceaeEssential oilAntiseptic[222]Bulbine frutescensAsphodelaceaeLeavesRingworm infections[223]Capparis tomentosaCapparaceaeRootLeprosy[224]Cissampelos capensisMenispermaceaeRhizomes & RootsBoils[225]Diospyros mespiliformisEbenaceaeRoots & leavesRingworm infections[226]ChironiabacciferaGentianaceaeWhole plantLeprosy & acne[227]Ekebergia capensisMeliaceaeBarkBoils & acne[228]Datura stramoniumSolanaceaeLeavesBoils & abscesses[229]Crinum macowaniiAmaryllidaceaeBulbs & leavesBoils & acne[215]Cucumis myriocarpusCucurbitaceaeRaw fruitBoils[217]Dichrostachys cinereaFabaceaeBarkAbscesses[230]DicomaanomalaAsteraceaeRoot & leavesRingworm infections[217]Harpagophytum procumbensPedaliaceaeRootsBoils[222]Elephantorrhiza elephantineFabaceaeRoots & RhizomesAcne[231]Dodonaea angustifoliaSapindaceaeLeavesBoils[232]Eriospermum abyssinicumEriospermaceaeLeavesBoils[233]Ficus natalensisMoraceaeLeavesBoils[228]GnidiakraussianaThymelaeaceaeRootsBoils[229]Senna italicaFabaceaeRootsFuruncles[234]Embelia ruminateMyrsinaceaeLeavesLeprosy[235]Eucalyptus camaldulensisMyrtaceaeBarkPimples[236]Erythrina lysistemonFabaceaeBarkAbscesses[228]Harpephyllum caffrumAnacardiaceaeBarkAcne[228]Ficus surMoraceaeBarkBoils[217]Lannea edulisAnacardiaceaeBarkBoils & abscesses[222]Kigelia africanaBignoniaceaeFruitAbscesses[228]Jatropha zeyheriEuphorbiaceaeRhizomesBoils[231]Jasminum fluminenseOleaceaeLeaves & ShootsBoils[233]Helichrysum odoratissimumAsteraceaeLeavesPimples[237]Jatropha curcasEuphorbiaceaeRhizomesBoils[222]Pellaea calomelanosAdiantaceaeLeaves & RhizomesBoils & abscesses[238]Ochna serrulataOchnaceaeRootsGangrene infections[239]Ricinus communisEuphorbiaceaeLeaf, Seeds & BarkBoils[220]Pelargonium alchemilloidesGeraniaceaeLeavesAbscesses[240]Rauvolfia caffraApocynaceaeBarkMeasles[241]Opuntia ficus-indicaCactaceaeLeavesFuruncles[242]Leonotis leonurusLamiaceaeLeaves & StemsBoils[243]Solanum capenseSolanaceaeSquashed berriesRingworm infections[233]Rumex lanceolatusPolygonaceaeLeavesBoils[222]Scilla natalensisHyacinthaceaeBulbBoils[223]Plantago afraPlantaginaceaeLeavesFuruncles[217]Psidium guajavaMyrtaceaeLeavesBoils[228]Solanum panduriformeSolanaceaeSapSkin infections[244]Vernonia adoensisAsteraceaeFlowersScabies[245]TylecodonwallichiiCrassulaceae-Abscesses[246]Solanum incanumSolanaceaeLeaves & RootsRingworm infections[247]Turbina oblongataConvolvulaceaeLeavesAbscesses[217]Withania somniferaSolanaceaeLeaves & BerriesAbscesses[229]Solanum hermanniiSolanaceaeFruit, Leaf & RootsBoils[217]Xysmalobium undulatumApocynaceaeRootsAbscesses[224]Ziziphus mucronataRhamnaceaeLeaves & RootsBoils[228]Solanum nigrumSolanaceaeWhole plantPimples & ringworm infections[220]Terminalia sericeaCombretaceaeRoot & BarkLeprosy[248]Solanum tomentosumSolanaceaeFruitSkin infections[249]Stephania abyssinicaMenispermaceaePowdered rootsBoils[250]Zantedeschia aethiopicaAraceaeLeavesBoils[251]
Table 11The effect of phytoconstituent on skin infections with respect to bacterial strain.PhytoconstituentBacteriaReferencesSanguinarineEscherichia coli, Bacillus subtilisStaphylococcus aureus, Enterococcus faecalis[252]Oleanolic acidM. tuberculosis, B. cereus[253]BerberineS. sanguinis, K. pneumoniaS. typhimurium[254]IsothiocyanatesE. coli, C. albicans,S. aureus, E. faecalis[255]TomatidineS. aureus[256]ReserpineK. pneumonia[257]AllicinS. epidermidis, P. aeruginosa, S. aureus[258]Cinchonidine CinchonineS. aureus[259]CitralE. coli, P. aeruginosa, S. aureus[260]Benzyl-isothiocyanateC. jejuni, S. aureus,[261]Phenyl-isothiocyanateE. coli, S. aureus,[262]ThymolE. coli, S. typhimurium[263]AjoeneP. aeruginosa[264]FarnesolS. aureus, S. epidermidis[265]EugenolS. typhimurium, L. monocytogenes[254]PiperineE. coli[266]Ursolic acidM. tuberculosis, S. sobrinus, S. mutans[267]CarvacrolS. aureus, M. tuberculosis, P. aeruginosa[260]GalanginK. pneumonia[268]CinnamaldehydeS. typhimurium, M. tuberculosis[254]LimoneneS. aureus, E. coli, E. faecium, P. aeruginosa[269]SalvipisoneS. aureus, E. faecalis, S. epidermidis[270]KaempferolK. pneumonia, S. aureus[271]LycopeneB. subtilis, E coli[272]Ergosterol peroxideM. tuberculosis[273]β-caroteneH. pylori, E coli[274]α-amyrinS. aureus[275]ChrysinS. aureus, E. coli, B. sublitis[276]ECGCE. coli, S. aureus, S. mutans,S. pyogenes, E. faecalis[277]Gallic acidE. coli, S. mutans[278]CoumarinsH. pylori[279]QuercetinE coli, S. aureus, K. pneumonia[280]MyricetinK. pneumonia, S. aureus[271]LacinartinP. gingivalis[281]Usnic acidCorynebacterium, S. aureus[282]LuteolinE coli, S. aureus, S. pyogenes[280]ResveratrolP. mirabilis, V. cholera[283]NaringeninS. typhimurium, P. aeruginosa[284]HesperetinS. aureus[285]MalvidinK. pneumonia[286]DemethyltexasinStaphylococci[287]FurocoumarinsE. coli, S. typhimurium[288]

Skin Cancer

Cancer is related to a molecular change in the human DNA that results in modifications in the body's biochemical and physiological functions [289]. Skin cancer has emerged as the most prevalent malignant condition responsible for 4.5 percent of all new cases of cancer, with an estimated annual growth of around one million [290]. Skin cancer is the most prevalent human malignancy, particularly in the white population, with more than one million cases diagnosed annually [291]. Skin cancers are named by the cell they originate from and their clinical behaviour. The three most popular forms are basal cell carcinomas (BCC), squamous cell carcinomas (SCC) (nonmelanocytic skin cancer-NMSC), and skin malignant melanoma (malignant skin melanoma or melanoma) [292]. As in certain other cancers that have led to environmental etiologies such as ultraviolet radiation, the prevalence of skin cancer has increased substantially with age, possibly representing the long lag between oncogene exposure and cancer development [291]. Non-melanomatous skin cancer prevalence greatly outweighs the number of melanomas, but fortunately, most of them are easy to treat. The two primary types, BCC and SCC, all come from epidermal keratinocytes. They are less dangerous than melanoma largely because of their tendency to stay restricted to their primary disease site, which makes their treatment much easier. The majority of keratinocyte malignancies are developed in the most ultraviolet-exposed areas of the skin, such as the face and arms [292]. Additionally, NMSCs constitute the most severe form of human cancer and may contribute to serious deformity, contributing to detrimental physical and emotional magnitudes on patients [293]. The most dangerous type of skin cancer is malignant skin melanoma (CM). Presumed to derive from epidermal melanocytes, CM is sometimes treatment-refractory and metastasis-prone cancer, the occurrence of which has slowly and considerably increased during the last few decades [292]. Melanoma is mostly diagnosed on men's trunks and women's lower legs, while it can be located on the head, arms, or elsewhere on the body. Early diagnosed cancer may be treated only by surgical excision [294]. This troubling and terrifying increase in death rate attributed to various forms of skin cancer has sparked the development of powerful anticancer agents with fewer side effects to battle this disease. As the aim of anticancer treatment is to pursue targeted chemotherapy drugs that only destroy or make benign the malignant tumor cells without harming normal cells [295]. Emerging chemotherapeutic agents that are widely used in oncology are harmful to normal cells. Thus it’s a need of the hour to search for novel, efficacious, and less toxic compounds obtained from natural sources such as phytoconstituents with anticancer activities [296]. Since the beginning of mankind, plants have been used as therapeutic agents to treat various ailments. Herbal drugs have many benefits as far as their accessibility is concerned. They are being used for the treatment of ample lethal conditions such as cancers and acquired immunodeficiency syndrome (AIDS), hepatitis, etc [297