Causal relationships between mitochondrial proteins and different pathological types of lung cancer: a bidirectional...

Area of Science:

• Genetics and Oncology
• Mitochondrial Biology

Background:

• Growing evidence suggests a link between mitochondrial proteins (MPs) and lung cancer (LC).
• The precise causal relationship between MPs and LC requires further elucidation.

Purpose of the Study:

• To investigate the potential causal associations between mitochondrial proteins and various pathological types of lung cancer.
• To explore the directionality of these causal relationships using bidirectional Mendelian randomization.

Main Methods:

• A two-sample Mendelian randomization (MR) study utilizing publicly available genome-wide association study (GWAS) data.
• Primary analysis employed the inverse variance weighted (IVW) method, supplemented by sensitivity analyses and bidirectional MR.
• Examined causality for overall LC, lung squamous cell carcinoma (LUSC), small cell lung carcinoma (SCLC), and lung adenocarcinoma (LUAD).

Main Results:

• Seven mitochondrial proteins demonstrated significant causal relationships with overall LC, LUSC, and/or SCLC.
• Specific findings include two MPs for overall LC, four for LUSC, and four for SCLC, with one MP showing a nominal association with LUSC.
• No causal associations were identified between MPs and lung adenocarcinoma (LUAD), nor were reverse causal effects observed.

Conclusions:

• This MR study provides evidence for causal associations between specific mitochondrial proteins and overall lung cancer, LUSC, and SCLC.
• The findings contribute to understanding the etiological role of mitochondrial dysfunction in specific lung cancer subtypes.
• Further research is warranted to explore the therapeutic potential of targeting these MPs in lung cancer.