Targeting VDAC1 to protect against mitochondria-linked cell death pathways: apoptosis, pyroptosis, ferroptosis, and associated diseases

Abstract

The pathways of programmed cell death (PCD), including apoptosis, pyroptosis, and ferroptosis, are interconnected. They can be activated simultaneously within tissues or cell lines and are often associated with various diseases. Thus, identifying a common player and inhibitor targeting several PCD types is essential. Here, we show that overexpression and oligomerization of the mitochondrial gatekeeper voltage-dependent anion channel 1 (VDAC1) is involved in apoptosis, pyroptosis, and ferroptosis, and specific VDAC1 oligomerization inhibitors, VBIT-4 and VBIT-12, prevented multiple forms of PCD triggered by various stimuli. In addition, they mitigated mitochondrial dysfunction, reduced reactive oxygen species production and intracellular Ca²⁺ levels, preserved mitochondrial-associated hexokinase, and inhibited assembly/activation of the NLRP3 inflammasome. In Alzheimer’s disease and inflammatory bowel disease mouse models, VBIT-4 and VBIT-12, respectively, protected against apoptosis, pyroptosis, ferroptosis, and disease-associated pathologies. Thus, we show that VDAC1 oligomerization represents a prime target for VBIT-4 and VBIT-12 that can simultaneously inhibit various PCD forms and diseases associated with enhanced PCD and/or inflammation.