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A Recessive oca2 Mutation Underlies Albinism in Xiphophorus fish

Xing, Y.; Boswell, W.; Parker, J.; Du, K.; Schartl, M.; Lu, Y.

2025-01-23 genetics
10.1101/2025.01.20.633999 bioRxiv
Show abstract

Oculocutaneous albinism (OCA) is a group of genetic disorders characterized by impaired melanin production, leading to reduced pigmentation in the skin, hair, and eyes. Xiphophorus, a genus of small freshwater fish, has been a pivotal model organism in pigmentation disorder research, providing key findings in the genetic pathways governing physiological and pathological pigment cell biology. Leveraging the well-established research framework provided by Xiphophorus, we have identified a spontaneously occurring albinism phenotype in swordtail fish Xiphophorus hellerii. Genetic mapping of albino fish showed that albinism is associated with a recessive mutation in the oca2 gene. This discovery provides a novel opportunity to explore functions of oca2 gene in pigment cell differentiation, pigment synthesis, melanosome assembly and transportation function and amelanotic melanoma development.

Published in Pigment Cell & Melanoma Research (predicted rank #3) · training set

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