Maternally inherited non-syndromic hearing loss associated with mitochondrial 12S rRNA A827G mutation in a Chinese family

2006 ◽  
Vol 344 (4) ◽  
pp. 1253-1257 ◽  
Author(s):  
Guangqian Xing ◽  
Zhibin Chen ◽  
Qinjun Wei ◽  
Huiqin Tian ◽  
Xiaolu Li ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Chinese Family ◽  
12S Rrna ◽  
Mitochondrial 12S Rrna ◽  
Syndromic Hearing Loss

Whole mitochondrial genome screening in two families with hearing loss: detection of a novel mutation in the 12S rRNA gene

2010 ◽  
Vol 30 (6) ◽  
pp. 405-411 ◽  
Author(s):  
Emna Mkaouar-Rebai ◽  
Nourhene Fendri-Kriaa ◽  
Nacim Louhichi ◽  
Abdelaziz Tlili ◽  
Chahnez Triki ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Mitochondrial Genome ◽  
Novel Mutation ◽  
Hot Spot ◽  
12S Rrna ◽  
Rrna Gene ◽  
12S Rrna Gene ◽  
Genome Screening ◽  
Mitochondrial 12S Rrna ◽  
Syndromic Hearing Loss

Sensorineural hearing loss has been described in association with different mitochondrial multisystemic syndromes, often characterized by an important neuromuscular involvement. Until now, mutations in mitochondrial DNA, especially in the 12S rRNA, the tRNASer(UCN) and the tRNALeu(UUR) genes, were implicated in syndromic or non-syndromic hearing loss either as a primary cause or as predisposing factors. In the present study, we performed a whole mitochondrial genome screening in two unrelated Tunisian families with inherited hearing loss. Results showed the presence of a novel mutation in the mitochondrial 12S rRNA gene in the two probands of these two families who belong to two different haplogroups: L3 and H6a1. The m.735A>G mutation affects a conserved nucleotide of the mitochondrial 12S rRNA gene in primates and other species and had a conservation index of 78.5% (11/14). We also detected known polymorphisms and sic novel mitochondrial variants. The present study confirmed that the mitochondrial 12S rRNA gene is a hot spot for mutations associated with hearing impairment.

Unique penetrance of hearing loss in a five-generation Chinese family with the mitochondrial 12S rRNA 1555A > G mutation

2011 ◽  
Vol 131 (9) ◽  
pp. 970-975 ◽  
Author(s):  
Meichao Men ◽  
Lu Jiang ◽  
Honghan Wang ◽  
Yalan Liu ◽  
Zhengmao Hu ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Chinese Family ◽  
12S Rrna ◽  
Mitochondrial 12S Rrna
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