Abstract：
BACKGROUND:In animal models, extracts from green tea have been shown to be remarkably effective at reducing the severity of adverse human health effects of overexposure to ultraviolet (UV) radiation. Although sunscreens and other photoprotective measures have traditionally been used for this purpose, there is a need for additional measures and natural products are increasingly being explored for that purpose. OBJECTIVE:Our purpose was to evaluate the effect of polyphenols from green tea on parameters associated with acute UV injury. METHODS:Areas of skin of normal volunteers were treated with an extract of green tea or one of its constituents. Thirty minutes later, the treated sites were exposed to a 2 minimal erythema dose solar simulated radiation. UV-treated skin was examined clinically for UV-induced erythema, histologically for the presence of sunburn cells or Langerhans cell distributions, or biochemically for UV-induced DNA damage. RESULTS:Application of green tea extracts resulted in a dose-dependent inhibition of the erythema response evoked by UV radiation. The (-)-epigallocatechin-3-gallate (EGCG) and (-)-epicatechin-3-gallate (ECG) polyphenolic fractions were most efficient at inhibiting erythema, whereas (-)-epigallocatechin (EGC) and (-)-epicatechin (EC) had little effect. On histologic examination, skin treated with green tea extracts reduced the number of sunburn cells and protected epidermal Langerhans cells from UV damage. Green tea extracts also reduced the DNA damage that formed after UV radiation. CONCLUSION:Polyphenolic extracts of green tea are effective chemopreventive agents for many of the adverse effects of sunlight on human health and may thus serve as natural alternatives for photoprotection.
journal_name
J Am Acad Dermatoljournal_title
Journal of the American Academy of Dermatologyauthors
Elmets CA,Singh D,Tubesing K,Matsui M,Katiyar S,Mukhtar Hdoi
10.1067/mjd.2001.112919subject
Has Abstractpub_date
2001-03-01 00:00:00pages
425-32issue
3eissn
0190-9622issn
1097-6787pii
S0190-9622(01)15463-0journal_volume
44pub_type
临床试验,杂志文章abstract：BACKGROUND:Although several studies have documented an undersupply of dermatologic services in the United States, little is known about the dermatopathology workforce. OBJECTIVE:Objectives included the following: (1) describe the dermatopathology workforce in the United States; (2) identify characteristics associated ...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/j.jaad.2010.09.733
更新日期：2011-12-01 00:00:00
abstract：:A case of Staphylococcus aureus--induced bullous dermatosis limited to the sites of glucocorticosteroid-induced striae atrophicae is described. Skin with compromised mechanical integrity may be more susceptible to disruption by invasion of bacteria and/or by their exotoxin. The pathogenesis of striae atrophicae and th...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/s0190-9622(84)70033-8
更新日期：1984-02-01 00:00:00
abstract：BACKGROUND:Butenafine hydrochloride, a benzylamine derivative with potent antifungal activity, has been used in Japan to treat superficial fungal diseases. OBJECTIVE:We evaluated the safety and efficacy of twice-daily butenafine versus its vehicle in the treatment of interdigital tinea pedis in a multicenter, randomiz...
journal_title：Journal of the American Academy of Dermatology
pub_type： 临床试验,杂志文章,多中心研究,随机对照试验
doi：10.1016/s0190-9622(97)70317-7
更新日期：1997-02-01 00:00:00
abstract：:Nonsteroidal anti-inflammatory drugs have been shown to inhibit inflammation, an integral part of the wound-healing process. Compromised wound repair has been demonstrated in laboratory animals administered high-dose nonsteroidal anti-inflammatory drugs, a phenomenon we speculate could occur in humans undergoing surge...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/s0190-9622(88)70119-x
更新日期：1988-05-01 00:00:00
abstract：:Six men suffering from acute dermatitis had positive patch tests to Larrea (creosote bush). The lesions preferentially involved sun-exposed sites, simulating a photodermatitis, but also were on the legs and scrotum. Our findings were more consistent with contact allergy than with a primary irritant or a phototoxic res...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/s0190-9622(86)70022-4
更新日期：1986-02-01 00:00:00
abstract：BACKGROUND:It is unsettled whether small plaque parapsoriasis (SPP) represents an inflammatory dermatosis or has a potential to transform into mycosis fungoides (MF) or is, in fact, MF. The literature contains no fully documented example of progression of SPP into MF. OBJECTIVE:The purpose of our study was to present ...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/j.jaad.2008.05.028
更新日期：2008-09-01 00:00:00
abstract：:To develop guidelines for the follow-up of patients with primary cutaneous melanoma (clinical Stage I), we studied 295 patients who had presented with a primary melanoma and who subsequently developed evidence of metastatic disease in the course of follow-up. Cox multivariate analysis was used to assess the influence ...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/s0190-9622(85)70218-6
更新日期：1985-11-01 00:00:00
abstract：BACKGROUND:The autoantibody-mediated disease in fogo selvagem (FS) is aggravated by sunlight exposure. OBJECTIVE:The aim of this study was to test whether UVB exposure of uninvolved skin of patients with FS (n = 21) enhances epidermal acantholysis and in vivo binding of FS autoantibodies as compared with a control gro...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：
更新日期：2000-04-01 00:00:00
abstract：:Dialogues in Dermatology, a monthly audio program from the American Academy of Dermatology, contains discussions between dermatologists on timely dermatologic topics. Commentaries from the Dialogues Editor-in-Chief, Warren R. Heymann, MD, are provided after each discussion as a topic summary. These highlights are prov...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/j.jaad.2004.03.012
更新日期：2004-07-01 00:00:00
abstract：BACKGROUND:There is lack of studies on the diagnostic accuracy of dermatoscopy and reflectance confocal microscopy (RCM) for dark pigmented lesions. OBJECTIVE:To assess the diagnostic accuracy of dermatoscopy plus confocal microscopy for melanoma diagnosis of dark pigmented lesions in real life. METHODS:Prospective a...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/j.jaad.2020.07.084
更新日期：2020-07-27 00:00:00
abstract：:Thirty-two patients with acne completed a randomized, double-blind study using topical 1% clindamycin phosphate or its vehicle applied twice daily for 8 weeks for a study of its effects on the intestinal microflora. Two clindamycin patients and one vehicle patient had Clostridium difficile in stools prior to therapy. ...
journal_title：Journal of the American Academy of Dermatology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/s0190-9622(86)70153-9
更新日期：1986-08-01 00:00:00
abstract：:Skin cancer is the most common form of cancer in the United States and accounts for an estimated 1 million new cases per year. In the white population, the rate of new melanomas diagnosed yearly has more than doubled from 5/100,000 in 1973 to 12/100,000 in 1990. The current lifetime risks for white persons are estimat...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1067/mjd.2002.120450
更新日期：2002-07-01 00:00:00
abstract：:In pyodermatitis-pyostomatitis vegetans annular pustular cutaneous lesions may precede, accompany, or follow the usually extensive vegetating oral disease. Sometimes only cutaneous or only oral lesions occur and previously have been described as separate entities. Clinical, histopathologic, and immunopathologic eviden...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章,评审
doi：10.1016/s0190-9622(94)70167-9
更新日期：1994-08-01 00:00:00
abstract：BACKGROUND:The incidence of cutaneous nontuberculous mycobacteria (NTM) infections is increasing. These infections are a diagnostic and therapeutic challenge. OBJECTIVE:We investigated the clinical features, diagnosis, and management of cutaneous NTM infections. METHODS:A retrospective case series studied 78 patients...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/j.jaad.2019.04.022
更新日期：2019-09-01 00:00:00
abstract：:The Chimila, a Colombian Amerindian group that lives at a low altitude, have a high incidence of actinic prurigo. We present the human lymphocyte antigen (HLA) findings of 43 Chimilas with the disease and of 62 control subjects and show an association of actinic prurigo with the Cw4 antigen. ...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/0190-9622(90)70150-g
更新日期：1990-06-01 00:00:00
abstract：:Cytodestructive or surgical therapy for patients with anogenital warts is frequently associated with recurrence. In February 1997, the US Food and Drug Administration approved imiquimod as a 5% cream for the treatment of anogenital warts. Activity of the drug results primarily from interferon alfa and other cytokine i...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章,评审
doi：10.1067/mjd.2002.126579
更新日期：2002-10-01 00:00:00
abstract：BACKGROUND:Kaposi varicelliform eruption (KVE), or herpes simplex virus (HSV) superinfection of pre-existing skin lesions, may complicate Darier disease. OBJECTIVE:We sought to compare the clinical features and outcomes of patients with Darier disease who developed KVE superinfection with those who did not. METHODS:A...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/j.jaad.2014.12.001
更新日期：2015-03-01 00:00:00
abstract：:A 52-year-old man with a history of melanoma presented to the emergency department with a massive intracranial hemorrhage. The patient deteriorated rapidly and was being considered as a potential organ donor. Three years before presentation, the patient had undergone wide excision of a 3.75-mm melanoma from his back w...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/j.jaad.2006.02.064
更新日期：2006-06-01 00:00:00
abstract：:Retinoids, synthetic vitamin A analogs, stimulate mucous metaplasia and gap-junction proliferation in embryonic and neoplastic epidermis. Such effects demonstrate that vitamin A has potent effects on epidermal differentiation. Oddly, however, retinoid action in normal postnatal tissues, where these drugs are used clin...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章,评审
doi：10.1016/s0190-9622(86)70236-3
更新日期：1986-10-01 00:00:00
abstract：BACKGROUND:In response to the increasing rate of skin cancer, particularly melanoma in the United States, the Environmental Protection Agency, the National Weather Service, the Centers for Disease Control and Prevention, National Association of Physicians for the Environment, and the American Academy of Dermatology, de...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/s0190-9622(97)70068-9
更新日期：1997-12-01 00:00:00
abstract：:The role of estrogens in the development of skin cancer is controversial. Sex steroids have a profound effect on the epidermis and epidermal appendages. Estradiol in pharmacologic doses has been reported to stimulate basal cell carcinoma in an animal model. Sex hormones act by means of a specific protein receptor. In ...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/s0190-9622(88)70101-2
更新日期：1988-05-01 00:00:00
abstract：BACKGROUND:Tinea corporis gladiatorum has been an infrequently reported condition in the dermatological literature. Two previous reports have investigated wrestlers during recognized epidemics of tinea corporis gladiatorum, but no study has examined wrestlers to determine the point prevalence of tinea corporis gladiato...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1067/mjd.2000.109284
更新日期：2000-12-01 00:00:00
abstract：:The incidence of malignant melanoma is increasing faster than that of any other cancer. It is important to identify subsets of the population at high risk of its development so that they can be observed more closely to identify early melanomas when they are curable. It has been reported worldwide that persons with the...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章,评审
doi：10.1016/0190-9622(95)90073-x
更新日期：1995-03-01 00:00:00
abstract：:Small erythematous or cyanotic lesions on the hands and feet of four patients with antiphospholipid antibodies are described. These discrete lesions outline capillaries and do not disappear when pressure is applied. The histologic features are identical to those described in skin thrombotic syndrome associated with an...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/0190-9622(91)70009-q
更新日期：1991-01-01 00:00:00
abstract：BACKGROUND:Epidermal spongiosis with exocytosis of eosinophils (ES) has been reported in biopsy specimens from patients with various dermatoses. Its diagnostic value and the patient's outcome remain poorly understood in those cases in which ES is not associated directly with diagnostic features of a bullous dermatosis....
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/s0190-9622(94)70120-2
更新日期：1994-06-01 00:00:00
abstract：:Recently, a relationship between immunologic alterations and the development of lichen nitidus (LN) lesions has been described. We treated LN lesions with topical dinitrochlorobenzene (DNCB) application in a patient with peripheral CD4+ T lymphocytopenia. After 4 months, the eruption cleared. We investigated histologi...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/s0190-9622(98)70377-9
更新日期：1998-08-01 00:00:00
abstract：:Incontinentia pigmenti is a rare genodermatosis of unknown etiology. A female infant with features typical of this disease was found to have basophils in early vesicular lesions. Mediators from these cells may be responsible for the accumulation of eosinophils in these lesions. ...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/s0190-9622(84)80008-0
更新日期：1984-02-01 00:00:00
abstract：:Two children who had classic maple syrup urine disease developed an eruptive dermatitis when plasma isoleucine levels, leucine levels, or both fell below normal during periods of protein restriction. The dermatitis was resistant to topical corticosteroid therapy. Rapid resolution occurred after treatment with isoleuci...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/0190-9622(93)70036-s
更新日期：1993-02-01 00:00:00
abstract：:A 56-year-old man had a deeply invasive leiomyosarcoma of the right buttock. Leiomyosarcomas of the skin and subcutaneous tissues are rare, and most occur on the extremities. Wide local excision is the therapy of choice. ...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章,评审
doi：10.1016/0190-9622(91)70094-i
更新日期：1991-04-01 00:00:00
abstract：BACKGROUND:The concept of contact allergy aggravating or inducing oral lichenoid mucositis diagnosed as oral lichen planus (OLP) is well recognized but somewhat controversial. OBJECTIVE:We sought to identify clinically relevant contact allergens that may be important in the management of patients with OLP. METHODS:We...
journal_title：Journal of the American Academy of Dermatology
pub_type： 杂志文章
doi：10.1016/S0190-9622(00)90123-3
更新日期：2000-02-01 00:00:00
