A new mutation in the COL4A3 gene responsible for autosomal dominant Alport syndrome, which only generates hearing loss in some carriers.
Eur J Med Genet 2014;
58:35-8. [PMID:
25450602 DOI:
10.1016/j.ejmg.2014.10.003]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 10/12/2014] [Indexed: 12/21/2022]
Abstract
Bilateral sensorineural hearing loss is a characteristic feature of Alport syndrome, which is always linked to renal manifestations so they have a parallel evolution and prognosis, and deafness helps to identify the renal disease. We report a family that suffers an autosomal dominant Alport syndrome caused by a previously undescribed mutation in the COL4A3 gene, in which several members have hearing impairment as the only clinical manifestation, suggesting that in this family deafness can occur independent of renal disease. This mutation is also present in a patient with anterior lenticonus, an observation only found in families with recessive and sex-linked Alport disease.
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