Correlation between polymorphisms of hypoxia-inducible factor-1α Pro582Ser and type 2 diabetic nephropathy

Area of Science:

• Genetics
• Endocrinology
• Nephrology

Background:

• Diabetic nephropathy (DN) is a major complication of type 2 diabetes.
• The role of genetic factors, such as hypoxia-inducible factor-1α (HIF-1α) gene polymorphisms, in DN development is under investigation.

Purpose of the Study:

• To investigate the association between the HIF-1α Pro582Ser gene polymorphism and type 2 diabetic nephropathy.
• To identify potential genetic risk factors for DN in patients with type 2 diabetes.

Main Methods:

• A case-control study involving 244 type 2 diabetes patients.
• Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to detect HIF-1α exon polymorphisms.
• Genotyping focused on the C/T single nucleotide polymorphism at the 1285 bp locus, resulting in the Pro582Ser variation.

Main Results:

• The frequency of CT heterozygotes for the HIF-1α Pro582Ser polymorphism was significantly higher in patients with DN compared to those without DN (P < 0.05).
• Logistic regression analysis identified high hemoglobin A1c and low high-density lipoprotein-cholesterol as independent risk factors for DN.
• The HIF-1α Pro582Ser polymorphism was not independently associated with DN when other risk factors were considered in the regression model.

Conclusions:

• The HIF-1α Pro582Ser single nucleotide polymorphism may be associated with type 2 diabetic nephropathy.
• Further studies with larger cohorts are warranted to elucidate the precise role of HIF-1α gene variations in the pathogenesis of diabetic nephropathy.