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Different regional distribution of SLC25A13 mutations in Chinese patients with neonatal intrahepatic cholestasis

World Journal of Gastroenterology 2013年第28期19卷 4545-4551页

作者： Rui Chen Xiao-Hong Wang Hai-Yan Fu Shao-Ren Zhang kuerbanjiang abudouxikuer Takeyori Saheki Jian-She Wang Center for Pediatric Liver Diseases Children's Hospital of Fudan University Institute for Health Sciences Tokushima Bunri University Tokushima 770-8514 Japan Department of Pediatrics Jinshan Hospital Fudan University

AIM: To investigate the differences in the mutation spectra of the SLC25A13 gene mutations from specific regions of China. METHODS: Genetic analyses of SLC25A13 mutations were performed in 535 patients with neonatal intrahepatic cholestasis from our center over eight years. Unrelated infants with at least one mutant allele were enrolled to calculate the proportion of SLC25A13 mutations in different regions of China. The boundary between northern and southern China was drawn at the historical border of the Yangtze ***: A total of 63 unrelated patients (about 11% of cases with intrahepatic cholestasis) from 16 provinces or municipalities in China had mutations in the SLC25A13 gene, of these 16 (25%) were homozygotes, 28 (44%) were compound heterozygotes and 19 (30%) were heterozygotes. In addition to four well described common mutations (c.851_854del, c.1638_1660dup23, c.615+5G>A and c.1750+72_17514dup17insNM_138459.3:2667 also known as IVS16ins3kb), 13 other mutation types were identified, including three novel mutations: c.985_986insT, c.287T>C and c.1349A>G. According to the geographical division criteria, 60 mutant alleles were identified in patients from the southern areas of China, 43 alleles were identified in patients from the border, and 4 alleles were identified in patients from the northern areas of China. The proportion of four common mutations was higher in south region (56/60, 93%) than that in the border region (34/43, 79%, χ 2 = 4.621, P = 0.032) and the northern region (2/4, 50%, χ 2 = 8.288, P = 0.041). CONCLUSION: The SLC25A13 mutation spectra among the three regions of China were different, providing a basis for the improvement of diagnostic strategies and interpretation of genetic diagnosis.

关键词： Citrin deficiency Mutation spectrum Intrahepatic cholestasis SLC25A13

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