Integrated metabolomics and gut microbiota analyses reveal the protective effects of matrine in ulcerative colitis. - Su, Linqi; Zhang, Yu; Xie, Yixuan; Wu, Jiazhen; Yang, Yang; Li, Yun; Huang, Yongtong; Liu, Xin; Wei, Xuemei; Chen, Qinhua (Frontiers in Chemistry, 2026)