KRAS and SKIL mutations synergistically promote pancreatic tumorigenesis through the ubiquitin-proteasome-mediated degradation of Smad4 - Chenxi Wang; Yarui Ma; Haixia Cheng; Junhu Yuan; Yixuan Zhang; Mei Liu; Xiaobing Wang; Yuchen Jiao (Journal of Experimental & Clinical Cancer Research, 2026)