ArticleClinics (Sao Paulo, Brazil)2026
Six IL-8 gene polymorphisms and the entire cancer susceptibility according to a comprehensive analysis especially in prostate cancer.
Article in Clinics (Sao Paulo, Brazil), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesInterleukin-8 (IL-8) is a key cytokine regulating immunity and inflammation, and its genetic polymorphisms have been increasingly linked to cancer susceptibility. However, findings on the role of specific IL-8 polymorphisms across different cancers remain inconsistent, necessitating a comprehensive meta-analysis.
methodsThe authors systematically searched Embase, PubMed, Chinese databases, Google Scholar, and Web of Science up to June 25, 2023. A total of 104 case-control studies (26,029 cases and 31,577 controls) were included in a high-powered meta-analysis. Summary Odds Ratios (ORs) with 95% Confidence Intervals (95% CIs) were calculated using Stata. Additionally, the authors performed an ELISA-based validation study to measure serum IL-8 levels in Prostate Cancer (PCa) patients grouped by genotype.
resultsThe +2767 polymorphism was associated with a significant reduction in overall cancer risk. The +781 polymorphism increased cancer risk specifically in Caucasian populations. In contrast, the -251 polymorphism demonstrated a strong pan-cancer risk association, particularly in Mixed/Asian ethnicities, gastric cancer, lung cancer, and hospital-based studies. Mechanistically, patients with the -251 AA/AC genotypes had elevated serum IL-8 levels, which were linked to more aggressive PCa pathogenesis.
conclusionThis pioneering meta-analysis identifies the IL-8 -251 polymorphism as a high-risk biomarker and +2767 as a protective variant. By functionally validating that the -251 risk allele promotes PCa progression via IL-8 overexpression, the present study establishes IL-8 genotyping as a potential tool for ethnic-specific risk stratification and prognostic prediction, with broad implications for precision oncology.
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