Whole blood was taken from the subjects and genomic DNA was extracted using isolation kit (DNGTM—Plus; SinaClon, Iran) according to the manufacturer's protocol. Genetic SNPs of IL-1α (rs1800587), IL-1β (rs1143627, rs16944, rs1143634), IL-8 (rs4073), and TNF-α (rs1799964, rs1800630, rs1799724, and rs361525) genes were analyzed using primers and respective restriction endonucleases by PCR-based restricted fragment length polymorphism (PCR-RFLP) as described previously (20 (link)–25 (link)).
IL-1α, IL-1β, IL-8, and TNF-α gene expression was evaluated by quantitative RT-PCR, based on RNA extraction and cDNA synthesis from blood leucocytes of all subjects using RNX-Plus kit (SinaClon, Iran) according to the manufacturer's instructions. Expression of candidate genes, as well as housekeeping glyceraldehyde-3-phosphate dehydrogenase (GAPDH) gene, was analyzed by real-time RT-PCR using SYBR Green assays. Primer sequences and conditions were designed by ABI PCR equipment (Applied Biosystems, USA) except GAPDH which obtained from previously published sequences (26 (link)) (Supplementary Table 1).
Free full text: Click here