Korean J Lab Med.  2006 Feb;26(1):58-63. 10.3343/kjlm.2006.26.1.58.

The -308 and -238 Polymorphisms of the TNF-alpha Promoter Gene in Type 2 Diabetes Mellitus

• Kim HR
• Lee MK
• Park AJ

• KMID: 2143199
• DOI: http://doi.org/10.3343/kjlm.2006.26.1.58

Abstract

BACKGROUND: Recently, two G->A polymorphisms at positions -308 and -238, in the promoter of the tumor necrosis factor-alpha (TNF-alpha) gene, have been identified. These variants have been linked to estimates of insulin resistance and obesity in different ethnic groups. The objective of the present study was to investigate whether these genetic variants of TNF-alpha were associated with features of the insulin resistance in two study populations comprising type 2 diabetic patients and healthy control subjects.
METHODS
We analyzed the polymorphisms of TNF-alpha gene in 198 type 2 diabetes mellitus (DM) patients and 169 healthy control subjects. We used five primers and two separate polymerase chain reaction (PCR) to detect the TNF-alpha polymorphism by the multiplex amplification refractory mutation system (ARMS) technique.
RESULTS
No statistically significant difference in the -308A and -238A allele frequencies was found between patients with type 2 DM and normal controls.
CONCLUSIONS
Our study does not support a major role of the nucleotide -308 or -238 substitutions of the TNF-alpha gene in the pathogenesis of insulin resistance.

Keyword

Type 2 DM; Tumor necrosis factor-alpha; Polymorphism; Amplification refractory mutation system

MeSH Terms

Diabetes Mellitus, Type 2*
Ethnic Groups
Gene Frequency
Humans
Insulin Resistance
Obesity
Polymerase Chain Reaction
Tumor Necrosis Factor-alpha*
Tumor Necrosis Factor-alpha

Reference

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