ArticleDiscover oncology2025
Deciphering bidirectional causal links between oxidative stress and lung cancer risk through Mendelian randomization.
Article in Discover oncology, 2025. 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
backgroundLung cancer remains the leading cause of cancer-related mortality globally. Despite advancements in treatment, survival rates for advanced-stage disease remain suboptimal, emphasizing the need for novel prevention strategies. Oxidative stress (OS), resulting from an imbalance between reactive oxygen species (ROS) and antioxidants, is implicated in lung cancer pathogenesis. This study aimed to explore bidirectional causal relationships between genetically predicted oxidative stress injury biomarkers (OSIBs) and lung cancer risk using mendelian randomization (MR).
methodsA two-sample bidirectional MR approach was used to assess causal effects of 16 OSIBs on lung cancer subtypes (small cell lung cancer, squamous cell carcinoma, and adenocarcinoma) and vice versa. Genetic data were derived from large-scale genome-wide association studies in European populations.
resultsMR analysis revealed significant associations. Higher albumin levels were associated with reduced adenocarcinoma risk (OR = 0.599, 95%CI: 0.369-0.974, P = 0.039). Elevated monounsaturated fatty acids levels were linked to an increased risk of squamous cell carcinoma (OR = 1.742, 95% CI: 1.095-2.772, P = 0.019). Increased lactate levels were positively associated with small cell lung cancer (OR = 4.565, 95% CI: 1.009-20.657, P = 0.049). Reverse MR analysis did not suggest causal effects of lung cancer on OSIBs.
conclusionThese findings highlight the distinct roles of OSIBs in lung cancer risk and underscore oxidative stress's pivotal role in cancer development. Further research is needed to validate these biomarkers for early detection and preventive strategies.
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