DNA Variations in Oculocutaneous Albinism: An Updated Mutation List and Current Outstanding Issues in Molecular Diagnostics
نویسندگان
چکیده
منابع مشابه
Oculocutaneous albinism
Oculocutaneous albinism (OCA) is a group of inherited disorders of melanin biosynthesis characterized by a generalized reduction in pigmentation of hair, skin and eyes. The prevalence of all forms of albinism varies considerably worldwide and has been estimated at approximately 1/17,000, suggesting that about 1 in 70 people carry a gene for OCA. The clinical spectrum of OCA ranges, with OCA1A b...
متن کاملMutation analysis of a Chinese family with oculocutaneous albinism
Oculocutaneous albinism (OCA) is an autosomal recessive disorder characterized by either complete lack of or a reduction in melanin biosynthesis in the skin, hair, and eyes. OCA1, the most common and severe type, is caused by mutations in the tyrosinase (TYR) gene. In this study, we report a Chinese family with two members affected by OCA. Blood samples were collected from all family members. G...
متن کاملOculocutaneous albinism type 2
Oculocutaneous albinism represents a group of inherited skin disorders characterized by a generalized reduction of cutaneous, ocular, and pilar pigmentation from the time of birth. Oculocutaneous albinism types I and II are the most common, with several other types described. A defect in the melanin synthesis pathway, resulting in reduced formation of melanin, is responsible for oculocutaneous ...
متن کاملOculocutaneous albinism in an isolated Tonga community in Zimbabwe.
Oculocutaneous albinism (OCA) is a recessively inherited genetic condition prevalent throughout sub-Saharan Africa. We now describe a cluster of tyrosinase positive OCA (OCA2) cases belonging to the Tonga ethnic group living in the Zambezi valley of northern Zimbabwe. The prevalence in this region was 1 in 1000, which is four times higher than that for the country as a whole. The gene frequency...
متن کاملDistribution of oculocutaneous albinism in Zimbabwe.
A survey of 1.3 million schoolchildren in Zimbabwe identified a total of 278 pupils with oculocutaneous albinism (OCA), giving a prevalence of 1 in 4728. Pupils with OCA were identified in every province of the country, but the distribution was not even. In certain areas, notably the capital, Harare, and the eastern province of Manicaland, the frequency was significantly higher than in others. ...
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ژورنال
عنوان ژورنال: Human Mutation
سال: 2013
ISSN: 1059-7794
DOI: 10.1002/humu.22315