中國漢族人群兒童孤獨(dú)癥的UBE3A基因突變篩查
[Abstract]:Objective the 15q11-13 region is one of the most complex chromosomal regions in the human genome. 15q11-13 repeat is also the most common copy number variation in autistic population. UBE3A gene is located in 15q11-13 region and encodes Ubiquitin protein ligase E3A, which is an important candidate gene for autism. In this study, the mutation of UBE3A gene was screened in Chinese autistic population and the correlation between mutation and autism was analyzed. Method 1. High resolution fusion curve (high resolution melting,HRM) and Sanger sequencing were used to screen for mutations in the coding region of UBE3A gene and its adjacent noncoding region in 192 autistic children (case group) and 192 healthy controls (control group). 2. The mutations found in mutation screening were expanded by HRM to analyze the differences in the frequency of mutation distribution between autistic patients and healthy controls. Result 1. A known single nucleotide substitution (TC,rs150331504) was found in the fourth coding region (CDS4) of the UBE3A gene. In the screening sample, there were 4 cases in the case group and 1 case in the control group, and the frequency of the mutation in the case group and the control group was 10 / 384 / 5 / 384 after expanding the sample, and there was no significant difference between the two groups. The minimum free energy of m RNA encoded by different alleles of rs150331504 was analyzed and compared. The results showed that the minimum free energy of allele T and allele C of rs150331504 were different to some extent. These results suggest that the variation may alter the secondary structure of m RNA during transcription. The other coding regions were not mutated. 2. Five base insertion deletions (AACTC / -, rs71127053) were found in the 288bp upstream of the second coding region (CDS2) of the UBE3A gene. The frequencies of both the case group and the control group were 16 / 192 (5%). There was no significant difference in allele and genotype distribution of rs71127053 between the case group and the control group (P0.05). There was no significant difference in genotype distribution of rs71127053 between case group and control group under different genetic models (P0.05). Conclusion UBE3A gene may not be associated with autism in Chinese Han population.
【學(xué)位授予單位】:上海交通大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:R749.94
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