Abstract
Background
Recently, two G->A polymorphisms at positions −308 and −238, in the promoter of the tumor necrosis factor-α (TNF-α) 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-α 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-α 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-α polymorphism by the multiplex amplification refractory mutation system (ARMS) technique.
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Table 1.
Primer | Oligonucleotide sequence (5′-3′)* |
---|---|
−308G | ACCCTGGAGGCTGAACCCCGTCTC |
−308A | ACCCTGGAGGCTGAACCCCGTCTT |
−238G | CACACTCCCCATCCTCCCTGCTTC |
−238A | CACACTCCCCATCCTCCCTGCTTT |
CP | GCCCCTCCCAGTTCTAGTTCTATC |
IPC-1† | CCCACCTTCCCCTCTCTCCAGGCAAATGGG |
IPC-2† | GGGCCTCAGTCCCAACATGGCTAAGAGGTG |