Download or read book An examination of eicosanoid production in human skin during the sunburn reaction and in relation to melanin production in melanocytic cells written by Mojgan Masoodi and published by . This book was released on 2008 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Eicosanoids in the Human Skin s Response to Ultraviolet Radiation written by Karl Gledhill and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Erythema is a hallmark skin response to excessive ultraviolet radiation (UVR) and is associated with cutaneous inflammation. Both are mediated by inflammatory mediators including nitric oxide (NO), prostaglandin E2 (PGE2) and chemoattractants such as 12-hydroxyeicosatetraenoic acid (12-HETE) leading to vasodilation and increased leukocyte infiltration. The erythematous response is more pronounced in individuals with low basal melanin levels or who fail to respond to UVR with a robust up-regulation of melanogenesis. While melanin production is a key function of melanocytes, these cells can also produce NO and PGE2, and are located in close proximity to the dermal vasculature. It has been hypothesized that melanocytes with poor melanogenic capacity may participate in the inflammatory response to UVR. The aim of this project was to investigate the inflammatory response in the skin of individuals with either skin phototype (SPT) 1 or 4 to UVR. Sixteen normal healthy individuals were selected for study (8 SPT-1 & 8 SPT-4). Buttock skin was investigated by immunohistochemistry for leukocyte subtypes, eicosanoid producing enzymes and NO synthases under basal and UVR-stimulated conditions. In addition primary cultures of epidermal melanocytes (EM) were established from 16 individuals (8 SPT-1 & 8 SPT-4) and assessed for the presence of eicosanoid-producing enzymes, melanogenic enzymes and NO synthases, by immunocytochemistry, Polymerase Chain Reaction and Western Blotting and for the production of the main pro-inflammatory eicosanoid PGE2 by ELISA and Mass Spectrometry. Moreover, the fatty acid composition of cultured melanocytes was assessed by Gas Chromatography. Results showed that individuals with SPT-1 had significantly greater neutrophil infiltration into the epidermis than those with SPT-4 at 24 hrs post-UVR. Moreover, CD3+ lymphocyte infiltration into the dermis was significantly greater in individuals with SPT-4 than those with SPT-1 at 24 and 72 hrs post-UVR. NOS-1, NOS-3, 12-LOX and COX-2 expression were significantly increased in SPT-1 skin, while NOS-2 and 15-LOX were significantly increased in SPT-4 skin. As 12-LOX and COX-2 products are chemoattractive (for neutrophils) and pro-inflammatory respectively these data could explain the greater observed neutrophil infiltration in SPT-1. The 15-LOX product (15-HETE) is anti-inflammatory and may suggest that 15-LOX up-regulation in SPT-4 skin may aid resolution of the sunburn response, which in part may be mediated by CD3+ lymphocytes and a class-switch in eicosanoid production from COX to LOX products. Melanocyte primary cultures surprisingly showed that SPT was not correlated with melanin content or melanogenic enzyme expression/activity suggesting that all melanocytes in vitro contained the necessary cellular machinery to produce melanin. This finding may reflect also their equal treatment under these enriched culture conditions, which may or may not be available to these cells in situ. Moreover, all melanocytes expressed the necessary machinery (PLA2, COX-1, cPGES) to produce PGE2. However, only some cultures did so at baseline and in response to UVR, and this was not correlated with SPT. A positive correlation was found however between expression level of dopachrome tautomerase (DCT) and protection against PGE2 production in response to UVR, which may suggest a novel role for DCT unrelated to melanogenesis. In summary this research project has generated data that highlights differences between the skin of individuals with SPT-1 and those with SPT-4, and may provide evidence that the keratinocyte partner contributes significantly to the SPT-associated response. This research may also suggest DCT as a novel therapeutic target to protect EM from participation in the UVR-associated inflammatory response in skin.
Download or read book A Single Sunburn Influences the Immune Component of Human Skin for Up to 14 Days written by Suzanne Pilkington and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sunburn is prevalent, and while the clinically apparent effects disappear relatively quickly, repeated episodes have longer term consequences including skin cancer. Pro-inflammatory eicosanoid expression and leukocytic infiltration characterise the peak of the sunburn response, however, little is known of these processes during the resolution phase. Therefore, in human skin, we examined the changes in eicosanoid expression and leukocytic infiltration up to 14 days post acute sunburn.Photoprotected buttock skin was exposed to 3x MED of broadband UVR and changes in skin erythema were measured over a 14 day period (n=13; 20-58 years, 5M/8F, phototype I-III). Biopsies and suction blister fluid were sampled from unexposed and UVR-exposed skin across the 14 day time-course and analysed by immunohistochemistry (neutrophil elastase, CD4, CD8, CD68, CD1a, COX-2, EP4) and LC-MS/MS (eicosanoids). Erythema, COX-2 expression, eicosanoid production and infiltration of innate immune cells (neutrophils and macrophage), peaked at D1 post UVR. By D7 erythema showed 60% resolution, while epidermal and dermal expression of the prostaglandin E2 receptor EP4 remained elevated up to D14. Infiltration of adaptive immune cells (CD4+ and CD8+ T cells) peaked later at D4-D7 and remained above baseline at D14 (p
Download or read book Cosmeceuticals and Active Cosmetics written by Raja K Sivamani and published by CRC Press. This book was released on 2015-09-18 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cosmeceuticals and Active Cosmetics discusses the science of nearly two dozen cosmeceuticals used today. This third edition provides ample evidence on specific cosmeceutical substances, their classes of use, skin conditions for which they are used, and points of interest arising from other considerations, such as toxicology and manufacturing. The book discusses both cosmetic and therapeutic uses of cosmeceuticals for various conditions including rosacea, dry skin, alopecia, eczema, seborrheic dermatitis, purpura, and vitiligo. Active ingredients in the following products are discussed: caffeine, curcumin, green tea, Rhodiola rosea, milk thistle, and more. Also covered are topical peptides and proteins, amino acids and derivatives, antioxidants, vitamins E and C, niacinamide, botanical extracts, and biomarine actives. Providing ample scientific references, this book is an excellent guide to understanding the science behind the use of cosmeceuticals to treat a variety of dermatological conditions.
Download or read book Reactive Oxygen Species ROS in Living Cells written by Filip Cristiana and published by BoD – Books on Demand. This book was released on 2018-05-23 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxygen represents only 20% of the Earth's atmosphere, yet it is vital for the survival of aerobic organisms. There is a dark part of the use of oxygen that consists in generating reactive species that are potentially harmful to living organisms. Moreover, reactive oxygen species can combine with nitrogen derivatives and generate many other reactive species. Thus, living organisms are continuously assaulted by reactive species from external or internal sources. However, the real danger comes in the case of high concentrations and prolonged exposure to these species. This book presents an image of the mechanisms of action of reactive species and emphasizes their involvement in diseases. Inflammation and cancer are examined to determine when and how reactive species turn the evolution of a benign process to a malignant one. Some answers may come from recent studies indicating that reactive species are responsible for epigenetic changes.
Download or read book Atlas of Dermatology in Internal Medicine written by Néstor P. Sánchez and published by Springer Science & Business Media. This book was released on 2011-12-02 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlas of Dermatology in Internal Medicine is the only concise text-atlas to cover the most common and most important cutaneous manifestations of systemic disease in children and adults. It features more than 150 clinical photographs that are accompanied by format-driven, clinically focused text on the diagnosis and management of cutaneous manifestations of connective tissue, pulmonary, renal, GI, endocrine, malignant, infectious, and HIV disease. There is also a separate chapter on skin diseases commonly seen in the ICU. A special feature is its systematic coverage of clinically relevant dermatopathology. The book is a helpful tool for physicians and trainees in internal medicine, family medicine, pediatrics, emergency medicine, and critical care medicine, as well as family, emergency, and critical care nurse practitioners.
Download or read book Lipid Mediators written by Fiona M. Cunningham and published by . This book was released on 1994 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides an overview of lipid mediators from synthesis to inhibition. It addresses the immune system and its diseases from a pharmacological viewpoint and combines clinical aspects with basic science.
Download or read book Pharmacology and Applications of Naturally Occurring Iridoids written by Biswanath Dinda and published by Springer. This book was released on 2019-03-26 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the author provides expert analysis on naturally occurring iridoids, their chemistry and their distribution in plants and insects. Particular attention is given to the pharmacology of iridoids and their prospective applications in pharmaceutical and agricultural industries. Iridoids are found in a wide variety of plants and some insects, and they are structurally derived from monoterpenoid natural products. In the first two chapters of this book, the author describes the iridoids classification, occurrence and distribution in plants and insects. The following chapters cover different chromatographic and spectroscopic techniques that can be used to identify and quantify iridoids in herbal formulations, and also the biosynthesis of iridoids, in which the reader will discover a metabolomics and transcriptomics analysis to identify the genes involved in the biosynthesis. The final chapters provide insights on several pharmacological activities of iridoids, their physiological role in insects, pharmacokinetics in mammals, insects and microorganisms, and their applications in medicine and agriculture. This book will engage students and researchers interested in the chemistry of natural products, and it will also appeal to medicinal chemists and practitioners working in the design of new herbal drugs with bioactive pure iridoids.
Download or read book Pigmentary Disorders written by Koushik Lahiri and published by JP Medical Ltd. This book was released on 2014-03-15 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive guide to pigmentary disorders of the skin covering numerous conditions as well as abnormalities of hair and nails.
Download or read book Skin Disorders in Migrants written by Aldo Morrone and published by Springer Nature. This book was released on 2020-04-09 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: This richly illustrated book is a comprehensive guide to the dermatologic disorders that may be encountered in refugees and other migrants. It will equip readers to diagnose and treat a diverse range of skin diseases and conditions, including, but not limited to, infections caused by bacteria, viruses, fungi, and parasites, dermatologic manifestations of sexually transmitted diseases, dermatoses associated with malnutrition, pigmentary disorders, bullous diseases, connective tissue diseases, and benign and malignant cutaneous neoplasias. Attention is drawn to various neglected tropical skin diseases and to the characteristic signs of torture and genital mutilations. Helpful information is also provided on the significance of skin color and the relevance of ethnic and genetic factors. The clinical chapters are complemented by discussion of the circumstances that give rise to migration, such as poverty, war, and environmental conditions. This enables the reader to gain a more rounded understanding of patients’ circumstances that in turn will positively impact on patient care. This book will be of wide interest to dermatologists, whether experienced or in training, as well as to general physicians and researchers.
Download or read book Pituitary Adenylate Cyclase Activating Polypeptide written by Hubert Vaudry and published by Springer Science & Business Media. This book was released on 2003 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pituitary Adenylate Cyclase-Activating Polypeptide is the first volume to be written on the neuropeptide PACAP. It covers all domains of PACAP from molecular and cellular aspects to physiological activities and promises for new therapeutic strategies. Pituitary Adenylate Cyclase-Activating Polypeptide is the twentieth volume published in the Endocrine Updates book series under the Series Editorship of Shlomo Melmed, MD.
Download or read book Contraindications in Physical Rehabilitation E Book written by Mitchell Batavia and published by Elsevier Health Sciences. This book was released on 2006-05-09 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt: This essential handbook provides clinicians with a summary of contraindications and precautions to review before treating patients seeking physical rehabilitation. This detailed resource discusses all of the contraindications in one convenient source and includes the full range of interventions, ranging from physical agents to supportive devices to therapeutic exercises. Organized by ICD categories and referenced from multiple sources, with strong coverage of adverse events, this handbook helps to ensure safe practice. Provides crucial, easily accessible information to refresh therapists on contraindications that may not fall within their routine area of treatment. Covers the full range of interventions in detail, including the purpose of the intervention, mechanism, contraindications and precautions, rationale, and references. Helps ensure that practitioners do no harm, providing safer client care and addressing clients with pre-existing conditions. Uses terminology from The Guide to Physical Therapist Practice, reinforcing the use of up-to-date language. Presents quality information from a highly renowned author, with evidence-based information throughout.
Download or read book Ultraviolet Light in Human Health Diseases and Environment written by Shamim I. Ahmad and published by Springer. This book was released on 2017-11-08 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about the roles and importance of Ultraviolet (UV) light from sun and from man-made UV lamps in our daily life, on health and diseases, also its application in sterilization and treatment. The key words are: reactive oxygen species, DNA damage, UV mutagenicity, skin cancers, polymorphous light eruption, Xeroderma pigmentosum, vitiligo, psoriasis, rheumatoid arthritis, diabetes mellitus, metabolic syndromes, cardiovascular diseases, dermatology, photobiology, photodermatosis, vitamin D synthesis, vitamin D efficiency, water sterilization, blood sterilization, phototherapies, skin tanning and UV dosimeter. The book starts with introduction to UV light and the history of development of UV lamps and its applications. It then moves to describing the interaction of this light with biological components and the production of reactive oxygen species, their roles in cell signaling, cellular defense from foreign invaders, in mutagenesis leading to skin diseases including vitiligo, polymorphous light eruption and various forms of skin cancer. Then it presents the synthesis and importance of UV light and diseases, induced due to the deficiency of vitamin D. Roles of UV light in sterilization, disinfection, phototherapies are depicted in the next part and finally use and abuse of UV light in tanning salon and the availability and importance of use of UV dosimeter are highlighted. The three main focuses of this book are: - Damage to biological systems by UV light leading to certain skin diseases; most importantly skin cancers. - Importance of UV light in the in vivo synthesis of vitamin D when human bodies are exposed to it. - Diseases caused due to the deficiency of vitamin D and the use of UV lamps in phototherapy and sterilization processes. The editor has considerable experience in publishing medical books and has used it critically selecting the matters which will attract the readers from many areas of medical and non-medical fields. It is hoped that the materials presented in this book will give great benefit and will stimulate both novice and expert researchers in the field. The book gives excellent overviews of the current status of research and pointers to the future research achievements. Clinicians, medical general practitioners, technicians and staff working in UV related industries and especially those working in tanning salon should benefit from the information presented in safe handling of this light.
Download or read book The Biology of the Skin written by Dr. R. K. Freinkel and published by CRC Press. This book was released on 2001-03-15 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: An authoritative, extensively illustrated clinician's textbook, The Biology of the Skin is written expressly for practitioners and residents in dermatology, plastic surgery, and otolaryngology. Essentially an expansion of the editors' and contributing authors' popular "Structure and Function" course given annually at the meetings of the American Academy of Dermatology, the book teaches skin biology in the context of practical clinical settings. This book covers the basic biology of the skin, how the skin functions, effects of the environment, the molecules that direct cutaneous function, genetic influences, and methods in cutaneous research. The Biology of the Skin provides a selective review of all biologic processes involving the skin and will foster an appreciation of how the skin works based on our knowledge of the basic science of skin structure and function in the 21st century.
Download or read book The Art of Skin Health Restoration and Rejuvenation Second Edition written by Zein E. Obagi and published by CRC Press. This book was released on 2014-12-18 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Art of Skin Health Restoration and Rejuvenation, Second Edition presents a comprehensive review of Dr. Zein Obagi’s renowned skin care regimens and his techniques for revitalizing skin. Fully demonstrated and explained are Dr. Obagi’s skin peels and his approach to correcting sun damage, control of the pigmentary system, the stimulation of skin collagen, and how to restore skin elasticity. With more than 200 illustrations, a presentation of Dr. Obagi’s skin classification system, and a special section on combining laser skin resurfacing with other techniques, this volume is a valuable resource for the plastic surgeon, dermatologist, and cosmetic facial surgeon.
Download or read book Textbook of Pediatric Dermatology written by Arun C Inamadar and published by JP Medical Ltd. This book was released on 2014-02-28 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of Textbook of Pediatric Dermatology has been fully revised to bring trainees and clinicians fully up to date with the latest advances in the field. Beginning with the basic structure and functions of the skin, the following chapters extensively review the diagnosis and treatment of different dermatological disorders in children, including neonatal dermatology, bacterial infections, psoriasis, pigmentation disorders and much more. Many chapters have been completely revised to reflect the latest treatment recommendations, procedures and therapeutic guidelines. Some new chapters have been added covering dermatosurgery and dermatoscopy, and all chapters have up to date references. This invaluable new edition includes nearly 800 clinical photographs, diagrams, flow charts and tables. Key points Fully updated new edition providing latest advances in paediatric dermatology Covers diagnosis and management of numerous disorders New chapters on dermatosurgery and dermatoscopy Previous edition published in 2009
Download or read book The Eicosanoids written by Peter Curtis-Prior and published by John Wiley & Sons. This book was released on 2004-07-16 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive reference work, updated from the first edition, brings together the knowledge and expertise of contributors from around the world. It includes new topics such as prostaglandin synthetase enzyme, new synthetic eicosanoids, innovative analytical methods, the influence of cytokines in the regulation of synthesis and actions, newer eicosanoids that influence the cardiovascular system, and newly discovered roles in reproduction and interactions with nitric oxide. This book satisfies a surge of interest in prostaglandins—NSAIDS (e.g. aspirin) are the biggest selling drugs of all time, and the field has been refreshed by the advent of new types (selective COX-2 inhibitors, anti-leukotiene drugs).
