Mitochondrial inner membrane (IMM) (IMM)

The mitochondrial inner membrane (IMM) of tumor cells is a highly specialized lipid bilayer that serves as the primary site for oxidative phosphorylation and cellular energy production (Weinberg & Chandel, 2015, doi:10.1038/ncb3109). In cancer cells, the IMM often exhibits a higher negative membrane potential (hyperpolarization) compared to normal cells, which facilitates the selective accumulation of lipophilic cationic drugs known as mitocans (Neuzil et al., 2013, doi:10.1038/nrd3974). This structure contains the electron transport chain (ETC) complexes, ATP synthase, and various transporters that are vital for maintaining the metabolic flexibility required for tumor growth and survival (Fulda et al., 2010, doi:10.1038/nrd3259). Therapeutic strategies targeting the IMM focus on disrupting the ETC, increasing the production of reactive oxygen species (ROS), or permeabilizing the membrane to release pro-apoptotic factors like cytochrome c (Gorrini et al., 2013, doi:10.1038/nrd4002). Consequently, the IMM represents a strategic target for inducing selective apoptosis in malignant cells while potentially sparing healthy tissues with lower mitochondrial activity.

Other names

Inner mitochondrial membraneMitochondrial cristaeIMM

Inhibition of the electron transport chain, disruption of mitochondrial membrane potential, and induction of reactive oxygen species (ROS) to trigger apoptosis.