title: Co-inheritance of specific genotypes of HSPG and ApoE gene increases risk of type 2 diabetic nephropathy.
abstract: The objective of this paper is to investigate co-inheritance of specific HSPG and ApoE genotypes in the development of Chinese type 2 diabetic nephropathy. PCR-RFLP was used to detect HSPG and ApoE genotypes in 385 Chinese subjects including 298 patients with type 2 diabetes mellitus (T2DM) and 87 non-diabetic controls (Non-DM). The T2DM group was subdivided into patients with (TDN; n = 218) and without diabetic nephropathy (Non-DN; n = 80). The latter group was further subdivided into groups of patients with microalbuminuria nephropathy (DN-1; n = 129) and severe diabetic nephropathy (DN-2; n = 89). We then compared the relative frequencies of various HSPG and ApoE genotypes and alleles among the groups, searching for predictive trends. The T allele of the HSPG gene occurred more frequently in the DN-2 group than in the Non-DN or DN-1 groups, their Fisher's exact p was 1.05 x 10(-3) and 6.58 x 10(-6); odds ratios were 2.09 (95% CI 1.32-3.30) and 2.48 (95% CI 1.64-3.74), respectively. The E2 allele of the ApoE gene occurred more frequently in the T2DM than in the Non-DM group, the Fisher's exact p was 0.0087; odds ratio was 3.45 (95% CI 1.30-9.81). Genotype analysis showed that the TT or TG of HSPG gene were paired with the E2/2 or E2/3 of ApoE gene significantly more frequently in the TDN group than in the Non-DN group, with an odds ratio of 3.03 (95% CI 1.03-8.90). There was no significant differences in other combinations of genotypes in HSPG and ApoE genes between TDN and Non-DN group. These results suggest that the HSPG T allele is a risk factor for the development of severe diabetic nephropathy in type 2 diabetic patients, and that the ApoE E2 allele is a risk factor for the occurrence of type 2 diabetes mellitus in Chinese general population. In addition, we find that co-inheritance of T/E2 confers a higher risk of type 2 diabetes mellitus progression to diabetic nephropathy in Chinese.
authors.affiliation: Department of Endocrinology and Metabolism, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai Diabetes Institute, China. liulimei2001@hotmail.com
authors.forename: Limei
authors.initials: L
authors.lastname: Liu
authors.forename: Kunsan
authors.initials: K
authors.lastname: Xiang
authors.forename: Taishan
authors.initials: T
authors.lastname: Zheng
authors.forename: Rong
authors.initials: R
authors.lastname: Zhang
authors.forename: Ming
authors.initials: M
authors.lastname: Li
authors.forename: Jie
authors.initials: J
authors.lastname: Li
mesh_terms: D000368:Aged; D000419:Albuminuria / Q000378:metabolism; D000483:Alleles; D001057:Apolipoproteins E / Q000235:genetics*; D016022:Case-Control Studies; D003924:Diabetes Mellitus, Type 2 / Q000150:complications* / Q000235:genetics*; D003928:Diabetic Nephropathies / Q000209:etiology* / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D019812:Heparan Sulfate Proteoglycans / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length; D012306:Risk; D012307:Risk Factors
chemical_list: D001057:Apolipoproteins E; D019812:Heparan Sulfate Proteoglycans