منابع مشابه
Pigmentation in Human Skin
Topica! tyrosine has been proposed as a tanning accelerator because tyrosine is a precursor of melanin. We tested formulations containing O, 1, and 2% L-tyrosine topically on 14 individuals daily for 28 days. Percutaneous absorption using "C tyrosine was 1.23% in 24 hr. No enhanced pigmentation was clinically evident in any of the subjects. In this study, we were unable to demonstrate that topi...
متن کاملCushing's syndrome and skin pigmentation.
the appendage biopsy results failed to give any indication of prognosis. In two of our cases the comment had been made at the first operation that " it would not be surprising if the rheumatic process were still active," and in these two cases the appendage biopsies showed numerous Aschoff bodies suggesting continued rheumatic activity. Another patient had several attacks of subacute rheumatism...
متن کاملThe regulation of skin pigmentation.
Visible pigmentation of the skin, hair, and eyes depends primarily on the functions of melanocytes, a very minor population of cells that specialize in the synthesis and distribution of the pigmented biopolymer melanin. Melanocytes are derived from precursor cells (called melanoblasts) during embryological development, and melanoblasts destined for the skin originate from the neural crest. The ...
متن کاملmicroRNA regulation of skin pigmentation in fish.
MicroRNAs (miRNAs) are endogenous small non-coding RNAs that play crucial roles in numerous biological processes. However, the role of miRNAs in skin color determination in fish has not been completely determined. Here, we identified that 13 miRNAs are differentially expressed between red and white skin. The analysis of miRNA spatial and temporal expression patterns suggests that miR-429 is a p...
متن کاملReaction-diffusion models of within-feather pigmentation patterning.
Feathers are complex, branched keratin structures that exhibit a diversity of pigmentation patterns. Feather pigments are transferred into developing feather keratinocytes from pigment cells that migrate into the tubular feather germ from the dermis. Within-feather pigment patterns are determined by differential pigmentation of keratinocytes within independent barb ridges during feather develop...
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ژورنال
عنوان ژورنال: Journal of Investigative Dermatology
سال: 2007
ISSN: 0022-202X
DOI: 10.1038/sj.jid.5700636