Evolutionarily conserved role of hps1 in melanin production and blood coagulation in medaka fish

Author:

Iwanami Norimasa1ORCID,Ozaki Yuka1,Sakaguchi Hiyori1ORCID,Watanabe Yuko2ORCID,Meng Qi2ORCID,Matsumoto Kyoka3,Suzuki Tomohiro1ORCID,Hitomi Kiyotaka2ORCID,Matsuda Masaru1ORCID

Affiliation:

1. Center for Bioscience Research and Education, Utsunomiya University , Utsunomiya 321-8505, Japan

2. Graduate School of Pharmaceutical Sciences, Nagoya University , Nagoya 464-8601, Japan

3. Tochigi Girl's High School , Tochigi 328-0074, Japan

Abstract

Abstract Hermansky–Pudlak syndrome is an autosomal recessive disease characterized by albinism, visual impairment, and blood platelet dysfunction. One of the genes responsible for Hermansky–Pudlak syndrome, hps1, regulates organelle biogenesis and thus plays important roles in melanin production, blood clotting, and the other organelle-related functions in humans and mice. However, the function of hps1 in other species remains poorly understood. In this study, we discovered albino medaka fish during the maintenance of a wild-derived population and identified hps1 as the responsible gene using positional cloning. In addition to the specific absence of melanophore pigmentation, the hps1 mutant showed reduced blood coagulation, suggesting that hps1 is involved in clotting caused by both mammalian platelets and fish thrombocytes. Together, the findings of our study demonstrate that hps1 has an evolutionarily conserved role in melanin production and blood coagulation. In addition, our study presents a useful vertebrate model for understanding the molecular mechanisms of Hermansky–Pudlak syndrome.

Funder

Japan Science and Technology Agency

Publisher

Oxford University Press (OUP)

Subject

Genetics (clinical),Genetics,Molecular Biology

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