Rapid detection of the hot spot gene mutations in Chinese patients with nonsyndromic hearing loss by polymerase chain reaction-restrictive fragment length polymorphism.
- Author:
Juan ZHAO
1
;
Ling-qian WU
;
Yong FENG
;
Hao HU
;
Qian PAN
;
Le-qin XIONG
;
De-sheng LIANG
Author Information
- Publication Type:Journal Article
- MeSH: Adolescent; Adult; Asian Continental Ancestry Group; genetics; Child; Child, Preschool; Connexin 26; Connexins; genetics; Female; Hearing Loss; genetics; Humans; Male; Membrane Transport Proteins; genetics; Mutation; Polymerase Chain Reaction; methods; Polymorphism, Restriction Fragment Length; Young Adult
- From: Chinese Journal of Medical Genetics 2009;26(5):518-520
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo develop a rapid genetic diagnosis technique for the patients with hereditary hearing loss by screening hot spots of mutations, namely 235delC of the GJB2 gene, IVS7-2A>G of the SLC26A4 gene, and 1555A>G of mitochondrial 12S rRNA.
METHODSMultiple PCR amplification of the three fragments covering the expected mutations in GJB2, SLC26A4 and 12S were carried out and the amplified products were analyzed by restriction fragment length polymorphism (RFLP).
RESULTSEighteen homozygous and 18 heterozygous 235delC, 2 homozygous and 13 heterozygous IVS7-2A>G, and 8 homogeneous 1555A>G were detected in the 200 patients with hearing loss. All the results were confirmed by sequencing. The detection rate of the three mutant alleles was 21.7% (71/400 + 8/200 = 0.217) and the genetic diagnosis rate was 14% [(18+2+8)/200 = 0.14].
CONCLUSIONIt is a convenient, efficient and economical method to screen the hot spots of mutation in the patient with hereditary hearing loss by using PCR-RFLP.
