Vitiligo is not caused by mutations in GTP-cyclohydrolase I gene.

Abstract excerpt

GTP-cyclohydrolase I (GTP-CH I) is the initial and rate-limiting enzyme in the synthesis of tetrahydrobiopterin, which regulates melanin biosynthesis. GTP-CH I is therefore a candidate gene for vitiligo. We have carried out DNA sequencing of all six exons and the promoter region of this gene, comprising 1759 base pairs, in 25 nonsyndromic vitiligo patients. However, contrary to an earlier report in which...

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