Fig. 7

Schematic model in which the USP5 deficiency inhibits MI/R-induced pyroptosis by suppressing RIPK1-mediated activation of caspase-8. Upon I/R, USP5 expression is upregulated, which subsequently inhibits K63-linked polyubiquitination of RIPK1 and promotes caspase-8 cleavage of gasdermin D to elicit pyroptosis. When USP5 is downregulated or mutated, RIPK1 reverse K63-linked deubiquitination, which leads to RIPK1 autophgic degradation and inhibits cell pyroptosis