RESUMO
BACKGROUND: This study aims to identify the association between microRNA 25 (mRNA 25) expression in serum and lung cancer (LC). METHODS: This planned study will cover all eligible case-controlled studies that report association between mRNA 25 expression in serum and LC. It will include published studies from inception to the present in Cochrane Library, PUBMED, EMBASE, Web of Science, Allied and Complementary Medicine Database, VIP database, and China National Knowledge Infrastructure regardless language and geographical location. We will also search other sources, such as conference abstracts and reference lists of related known studies and experts in the domain consulted to avoid missing potential studies. Two contributors will independently examine and select studies, collect all necessary data, and judge study quality for all included studies. We will perform statistical analysis using RevMan V.5.3 software and Stata V.12.0 software. RESULTS: This study will summarize current evidence to present first systematic review of research on the association between mRNA 25 expression in serum and LC. CONCLUSION: This study will present comprehensive evidence to determine whether mRNA 25 expression in serum is associated with LC, and will provide helpful evidence for the future studies. SYSTEMATIC REVIEW REGISTRATION: INPLASY202040056.