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To investigate the effects of tBHP on keratinocytes in vivo, we analysed hair growth in tBHP-treated neonatal rats. Sprague�CDawley this website and Long�CEvans rat pups were injected subcutaneously with tBHP or vehicle once daily for 6?days, and hair growth was monitored. The tBHP-treated rats had a significant delay in hair growth. However, this delay reversed within days, and the hair coats, including hair pigmentation, of tBHP-treated and sham-treated rats were indistinguishable 2?weeks later. Histological analysis and BrdU labelling of S phase cells confirmed the delay in hair-follicle growth and its reversal in tBHP-treated rats. Our results indicated that the changes incurred in hair follicles by short-term use of high-dose oxidants in vivo are temporary and reversible. ""Abstract:? Recently, 3% diclofenacnatrium gel (diclofenac) was introduced for the treatment of actinic keratoses. Data on photocarcinogenesis of topical diclofenac are limited, and we wished to investigate whether topical Selleckchem Rapamycin diclofenac can accelerate photocarcinogenesis using simulated solar radiation (SSR). Diclofenac was applied topically on the backs of hairless, female, C3.Cg/TifBomTac immunocompetent mice three times weekly followed by ultraviolet radiation (2, 3, or 4 Standard Erythema Dose) until death. There was a significant difference in survival between diclofenac-treated groups and control groups (P?Flavoprotein in the skin equivalent model. Experimental Dermatology 2010. Abstract:? Recently, human embryonic stem cells have been differentiated in vitro into functional epidermal keratinocytes. Here, we demonstrated that these cells can be generated also from non-embryonic, human umbilical cord blood (hUCB) cells that have the potential to differentiate into cells of non-hematopoietic lineage. Human UCB mono-nucleated cells were cultivated in monolayer and in three-dimensional skin equivalent cultures and assayed for the presence of phenotype-specific markers.