Identification of copy number variation of CAPN10 in Thais with type 2 diabetes by multiplex PCR and denaturing high performance liquid chromatography (DHPLC).
Copy number variations (CNVs) have been shown to be associated with several diseases. They can cause deviation of genotypes from Hardy-Weinberg Equilibrium (HWE). Genetic case-control association studies in Thais revealed that genotype distribution of CAPN10 Indel19 was deviated from HWE after correction of genotyping error. Therefore, we aim to identify CNVs within CAPN10 Indel19 region. The semi-quantitative denaturating high performance liquid chromatography (DHPLC) method was used to detect CNVs in the region of CAPN10 Indel19 marker in cohort of 305 patients with type 2 diabetes and 250 control subjects without diabetes. CNVs in the region of CAPN10 Indel19 was successfully detected by DHPLC. After correction of genotype calling based on the status of identified CNVs, CAPN10 Indel19 genotypes were well-fitted for HWE (p>0.05). However, we did not find association between CNV genotypes and risk of type 2 diabetes in our population. CNVs in CAPN10 have been identified in Thais. These CNVs lead to deviation from HWE of CAPN10 Indel19 genotypes. After excluding identified CNVs from the analysis, CAPN10 Indel19 was associated with type 2 diabetes. The information obtained from our study would be helpful for genotyping accuracies of SNPs residing in the CNVs region.
Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine Siriraj Hospital Mahidol University, Bangkok 10700, Thailand. sinpv.natpl@gmail.com
Nattachet
N
Plengvidhya
Kanjana
K
Chanprasert
Watip
W
Tangjittipokin
Wanna
W
Thongnoppakhun
Pa-Thai
PT
Yenchitsomanus
D000328:Adult; D000368:Aged; D002154:Calpain / Q000235:genetics*; D016022:Case-Control Studies; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D015331:Cohort Studies; D056915:DNA Copy Number Variations; D003924:Diabetes Mellitus, Type 2 / Q000208:ethnology* / Q000235:genetics; D005260:Female; D018628:Gene Dosage / Q000235:genetics; D005819:Genetic Markers; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D060885:Multiplex Polymerase Chain Reaction / Q000379:methods*; D015203:Reproducibility of Results
D005819:Genetic Markers; D002154:Calpain; C415197:calpain 10