Mutation spectrum of MMACHC in Chinese patients with combined methylmalonic aciduria and homocystinuria

Mei Ying Liu, Yan Ling Yang, Ying Chen Chang, Szu Hui Chiang, Shuan Pei Lin, Lian Shu Han, Yu Qi, Kwang Jen Hsiao, Tze Tze Liu*

*此作品的通信作者

研究成果: Article同行評審

97 引文 斯高帕斯(Scopus)

摘要

The cblC type of combined methylmalonic aciduria (MMA) and homocystinuria (HC) is the most common inborn error of vitamin B 12 metabolism and is caused by mutations in the MMACHC gene. To elucidate the spectrum of mutations that causes combined MMA and HC in Chinese patients, the MMACHC gene was sequenced in 79 unrelated Chinese patients. Sequence analysis identified 98.1% of disease alleles and found that all patients had at least one MMACHC mutation. A total of 24 mutations were identified. Out of the 24 mutations identified, 9 were novel ones, including missense mutations (c.365AT and c.452AG), nonsense mutations (c.315 > CG and c.615 > CA), deletions (c.99delA and c.277-3-c.303del30), duplications (c.248dupT and c.626dupT) and an insertion (c.445-446insA). The c.609 > GA, c.658-660delAAG, c.482 > GA, c.394 > CT and c.80 > AG mutations were the most common mutations and accounted for 80% of disease alleles. Haplotype analysis suggests that the spread of the c.80 > AG, c.609 > GA and c.658-660delAAG mutations in Chinese patients were caused by a founder effect. The results indicate that defects occurring in the MMACHC gene are the major cause of this disease in Chinese patients with combined MMA and HC, and direct mutation analysis can therefore be used as a rapid confirmatory diagnosis among these Chinese patients.

原文English
頁(從 - 到)621-626
頁數6
期刊Journal of Human Genetics
55
發行號9
DOIs
出版狀態Published - 9月 2010

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