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Genomic DNA was extracted from peripheral blood lymphocytes of 105 healthy and 75 NIDDM Chinese subjects. The fragment located in exon 13 of the low density lipoprotein receptor (LDLR) gene was amplified by polymerase chain reaction (PCR), and digested with restriction enzyme Hincll. LDL, TC and TG levels were measured in all subjects. Investigations were conducted to explore the correlation between the Hincll RFLP of LDLR gene aned NIDDM in the Chinese population. The results showed that no significant correlation existed between this RFLP locus and NIDDM. Marked differences were found, however, between the genotype distribution of low LDL level subgroups of NIDDM patients and normal controls. It was inferred that the H1 allele might be associated with high blood cholesterol levels, and the H2 allele with low cholesterol levels. Disturbances of lipid metabolism occur frequently in diabetes mellitus. This study suggested that differences in LDLR genotypes may affect the phenotypes of lipid metabolism.
The fragment located in exon 13 of the low density lipoprotein receptor (LDLR) gene was amplified by polymerase chain reaction (PCR), and digested with restriction enzyme Hincll. Genomic DNA was extracted from peripheral blood lymphocytes of 105 healthy and 75 NIDDM Chinese subjects. The results showed that no significant correlation existed between this RFLP locus and NIDDM. Marked differences were found, however, between the genotype distribution of low LDL level subgroups of NIDDM patients and normal controls. It was inferred the H1 allele might be associated with high blood cholesterol levels, and the H2 allele with low cholesterol levels. Disturbances of lipid metabolism occur frequently in diabetes mellitus. This study suggested that differences in LDLR genotypes may affect the phenotypes of l ipid metabolism.