期刊
PIGMENT CELL & MELANOMA RESEARCH
卷 31, 期 2, 页码 -出版社
WILEY
DOI: 10.1111/pcmr.12662
关键词
albinism; hair; lysosome-related organelles; pheomelanin; whole-exome sequencing
资金
- JSPS KAKENHI
- Kao Melanin Workshop
Hermansky-Pudlak syndrome (HPS) is an autosomal recessive disorder characterized by oculocutaneous albinism (OCA), a bleeding tendency, and ceroid deposition. Most of the causative genes for HPS encode subunits of the biogenesis of lysosome-related organelles complex (BLOC). In this study, we identified one patient each with HPS4, HPS6, and HPS9 by whole-exome sequencing. Next, we analyzed hair samples from the three patients and representative patients with HPS1 and controls using electron microscopy and chemical methods. All HPS patients had fewer, smaller, and more immature melanosomes than healthy controls. Further, all patients showed reduced total melanin content and increased levels of benzothiazine-type pheomelanin. The results of this study demonstrate the impact of the dysfunctions of BLOCs on the maturation of melanosomes and melanin levels and composition through analysis of their hair samples.
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