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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

P-locus is a target for the melanogenic effects of MC-1R signaling: a possible control point for facultative pigmentation.

Melanocortin receptor type 1 (MC-1R) is an important control point for ultraviolet ray (UVR)-induced tanning response in the skin. In this study, we show that p-locus is a downstream target for MC-1R signaling. The expression of p-locus was up-regulated by alpha-MSH as well as db-cAMP, a synthetic analogue of cAMP that mimics activation of MC-1R. Furthermore, p-locus transcript abundance was significantly increased in epidermal melanocytes of white skin with facultative (UVR-induced) pigmentation. Because p-locus product is essential for pigmentation and also has been shown to be highly polymorphic in human population, we propose that the pigmentary response to the melanocortin peptides/UVR would be affected not only by MC-1R mutations but also by the functionality of p-locus product. These factors together could account for the many different levels of tanning ability seen in the white population.[1]

References

  1. P-locus is a target for the melanogenic effects of MC-1R signaling: a possible control point for facultative pigmentation. Ancans, J., Flanagan, N., Hoogduijn, M.J., Thody, A.J. Ann. N. Y. Acad. Sci. (2003) [Pubmed]
 
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