Migraine (Mg) is a multifaceted neurovascular disorder caused by genetic and
several environmental etiologies. We have implemented a case-control study of
TNF gene polymorphism in 212 Mg patients and 218 healthy
controls utilizing the ARMS-PCR technique, followed by Sanger sequencing.
Besides, we have conducted a meta-analysis of different genetic models (five
genetic models) to combine and summarize the available data from 11 studies
(including this present research). The strength of genetic associations in the
meta-analysis used to assess by the pooled odds ratio (OR) and 95% confidence
intervals (CI). The results of this case-control study discovered a significant
relationship with Mg in recessive and homozygous genotype with OR = 2.35 (95% CI
[0.96–5.74]), p-value = 0.045. Also, the outcomes of meta-analysis
suggested an irrelevant relationship between TNF gene
(rs1800629) polymorphism and Mg susceptibility in the five genetic
models. However, subgrouping based on ethnic background showed a significant
association in the allelic genetic model with OR = 1.53 (95% CI [1.02–2.31]),
p = 0.040 respectively. The meta-analysis results of
TNF gene polymorphism may represent a risk factor for Mg among
Asians. In the future, large scale, multicentric case-control study by
classification of patients with Mg with or without aura can be performed
worldwide to identify the potential genetic risk factors leading to Mg
pathogenesis.