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Sequence analysis of tyrosinase gene in ocular and oculocutaneous albinism patients: introducing three novel mutations

PURPOSE: Albinism is a heterogeneous genetic disorder of melanin synthesis that results in hypopigmented eyes (in patients with ocular albinism) or hair, skin, and eyes (in individuals with oculocutaneous albinism). It is associated with decreased visual acuity, nystagmus, strabismus, and photophobi...

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Detalles Bibliográficos
Autores principales: Khordadpoor-Deilamani, Faravareh, Akbari, Mohammad Taghi, Karimipoor, Morteza, Javadi, Gholamreza
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Vision 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4499471/
https://www.ncbi.nlm.nih.gov/pubmed/26167114
Descripción
Sumario:PURPOSE: Albinism is a heterogeneous genetic disorder of melanin synthesis that results in hypopigmented eyes (in patients with ocular albinism) or hair, skin, and eyes (in individuals with oculocutaneous albinism). It is associated with decreased visual acuity, nystagmus, strabismus, and photophobia. The tyrosinase gene is known to be involved in both oculocutaneous albinism and autosomal recessive ocular albinism. In this study, we aimed to screen the mutations in the TYR gene in the nonsyndromic OCA and autosomal recessive ocular albinism patients from Iran. METHODS: The tyrosinase gene was examined in 23 unrelated patients with autosomal recessive ocular albinism or nonsyndromic OCA using DNA sequencing and bioinformatics analysis. RESULTS: TYR gene mutations were identified in 14 (app. 60%) albinism patients. CONCLUSIONS: We found 10 mutations, 3 of which were novel. No mutation was found in our ocular albinism patients, but one of them was heterozygous for the p.R402Q polymorphism.