目的   探讨溶酶体相关膜蛋白3（LAMP3）与肾癌发病风险之间的因果关系，为肾癌的分子致病机制提供新的理论依据。方法   基于全基因组关联研究（GWAS）数据，采用孟德尔随机化分析方法，评估LAMP3基因表达与肾癌的因果关系。并通过GEPIA2分析LAMP3表达对肾癌总体生存期（OS）及无病生存期（DFS）的关系。结果  LAMP3基因变异与肾癌风险呈正相关，提示LAMP3的表达可能增加肾癌的发病风险。此外，GEPIA2分析进一步显示，LAMP3的高表达与肾癌患者的低总体生存期（OS）及无病生存期（DFS）显著相关。结论   本研究通过孟德尔随机化分析探讨了LAMP3基因表达与肾癌的因果关系，结果表明LAMP3可能是肾癌的潜在致病因子，并与肾癌预后相关。这为肾癌的分子致病机制研究提供了重要的理论依据，并为未来的生物标志物和靶向治疗策略的开发提供了新的思路。

        Objective  To investigate the causal  relationship  between LAMP3 expression and  renal cancer  risk  using Mendelian randomization analysis，providing a theoretical basis for understanding the molecular mechanisms underlying renal cancer．Methods  This study utilized data from genome-wide association studies（GWAS）and employed Mendelian randomization analysis to assess the causal relationship between LAMP3 gene expression and renal cancer．Additionally，GEPIA2 was used to examine the association between LAMP3 expression and overall survival（OS）and disease-free survival（DFS）in renal cancer patients．Results  Variants in the LAMP3 gene were positively correlated with renal cancer risk，suggesting that LAMP3 expression may increase the likelihood of developing renal cancer．Furthermore，GEPIA2 analysis  revealed that high expression of LAMP3 was significantly associated with lower OS and DFS in renal cancer patients．Conclusions  This study explored the causal  relationship between LAMP3 gene expression and renal cancer through Mendelian randomization analysis．The results indicate that LAMP3 may be a potential pathogenic factor in renal cancer and is associated with poor prognosis．These findings provide important theoretical insights into the molecular mechanisms of  renal cancer and offer new perspectives for the development of biomarkers and targeted therapeutic strategies in the future．