AUTHOR=Li Peihong , Wang Yiwen , Hu Hongyi , Sun Boyun TITLE=Role of PD-L1 in mediating the effect of lipid on ulcerative colitis: a mediation Mendelian randomization study JOURNAL=Frontiers in Genetics VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2025.1390605 DOI=10.3389/fgene.2025.1390605 ISSN=1664-8021