Stiffness-activated hepatic stellate cells boost HCC migration via TGM2/ITGB1-mediated matrix remodeling and mitochondrial transfer

Hepatic stellate cells (HSCs) undergo differentiation into cancer-associated fibroblasts (CAFs), which constitute the primary stromal cell population within the liver tumor microenvironment and are associated with poor prognosis in patients with hepatocellular cancer (HCC). The precise mechanisms through which CAFs facilitate HCC progression remain incompletely elucidated. In this study, we emphasize the role of transglutaminase 2-medated integrin β1 in the activation of HSCs induced by increased matrix stiffness. Furthermore, we explore how enhanced matrix stiffness promotes mitochondrial transfer, thereby facilitating the migration of HCC cells. These insights may inform the development of targeted therapeutic strategies for the clinical management of HCC.