Background: Acne is a self-limiting chronic inflammatory disorder of pilosebaceous follicles seen among young adults with significant psychological and social impact. Tretinoin which was widely used for many years is being replaced gradually by newer generation agents like Tazarotene and Adapalene which unlike Tretinoin are specific for a subset of retinoic acid receptors. Objectives: To compar...

many properties of chemicals depend on their streochemistry. among these, the effects of streoisomerism on percutaneous absorption of drugs, which is subject of the present investigation, is not well studied yet. in this study, tretinoin (tt) and isotretinoin (itt) (geometric isomers) were chosen and their permeations (alone or in the presence of each other) through enhancer-treated excised rat...

Since in vitro methods (2D and 3D) used for the preclinical testing of candidate anti-aging compounds mimic complexity human skin aging unsatisfactorily, we wished to develop an ex vivo assay interrogating key aging-read outs healthy skin. Healthy, full-thickness biopsies (2 males, 4x females; 22 - 77 years) were organ-cultured serum-free, supplemented medium 3 days presence/absence recognized ...

BACKGROUND/OBJECTIVES Acne, a common pediatric disease, tends to be more comedonal in preadolescents, whereas older individuals are more likely to have inflammatory lesions in addition to comedones. Thus the microbiome of preadolescents may be different. In this pilot study we aimed to characterize the preadolescent acne microbiome, compare the microbiome in preadolescents with and without acne...

Melasma is an irregular brown or grayish-brown facial hypermelanosis, often affecting women, especially those living in areas of intense UV radiation. The precise cause of melasma remains unknown; however, there are many possible contributing factors. Because of its dermal component and tendency to relapse, melasma is often difficult to treat. The use of broad-spectrum (UVA + UVB) sunscreen is ...

Background. Although isotretinoin orally is commonly used for moderate to severe or scarring acne, it is not a cure. Unfortunately recurrence is unpredictable and varies within the acne population. Objectives. Using a proof of concept study, determine the recurrence of acne after isotretinoin use in male patients. Methods. Twenty males aged 18-45 years old were enrolled. Subjects successfully c...