Characterization and expression of soluble guanylate cyclase in skins and melanocytes of sheep

Acta histochemica
Shanshan YangChangsheng Dong

Abstract

The study reported the characterization of soluble guanylate cyclase (sGC) with the size of CDS of 1860bp, encoding a protein of 620 amino acids and containing several conserved functional domains including HNOB, HNOBA, and CHD. Quantitative real time PCR analysis of sGC showed that the expression of sGC mRNA is higher (∼5 fold) in white sheep skin relative to black sheep skin with significant difference (P<0.01). Using a rabbit polyclonal anti-sGC antibody, an immune reactive band corresponding to sheep sGC protein was detected in the skin samples by Western blotting analysis, and the expression of sGC protein was significantly higher in white sheep skin compared to black sheep skin (P<0.01). Immunohistochemical analysis revealed that sGC protein was localized in cytoplasm and intercellular substance of upper hair papilla in hair follicles of white sheep skin, but the protein was localized in cytoplasm and intercellular substance of lower hair bulb and outer root sheath cells in hair follicles of black sheep skin. The immunocytochemical analysis revealed that sGC was expressed in melanocytes in vitro of sheep skin. Over expression of sGC in melanocytes resulted in decreased expression of key melanogenic genes including microph...Continue Reading

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