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. 2024 Mar 6;17:1481–1501. doi: 10.2147/JIR.S448693

Figure 1.

Figure 1

Cellular and molecular mechanisms of pyroptosis-related signaling pathways. Pyroptotic signaling pathways are mainly triggered by the stimulation of damage-associated molecular patterns (DAMPs) or pathogen-associated molecular patterns (PAMPs), leading to the activation of a variety of inflammasome components. The activated inflammasome proteins further activate the Caspase-1 pathway. Then, the activated Caspase-1 splits GSDMD to produce GSDMD N-fragment and plasma membrane pores, resulting in pyroptosis-dependent cell death. Furthermore, the Caspase-1 pathway triggers the formation and release of IL-1β and IL-18 inflammatory factors. In addition, LPS binds to the precursor of Caspase-4/5/11, inducing pyroptosis. Caspase-3/GSDME can also cause pyroptosis-mediated cell death. In addition, mitochondrial and death receptors can also trigger the Caspase-3 pathway. The activated Caspase-3 splits GSDME to produce GSDME N-fragment, creating cytoplasmic membrane pores, cell contraction and denaturation, resulting in pyroptosis-mediated cell death.