Mitochondrial membrane phospholipids

Mitochondrial membrane phospholipids are essential structural and functional lipids, primarily located in the inner mitochondrial membrane (IMM), where they facilitate cellular energy production and maintain organelle integrity (Mejia & Hatch, 2016). The most prominent member, cardiolipin, is unique for its dimeric structure and is vital for the stability of electron transport chain supercomplexes and the formation of cristae (Claypool & Koehler, 2012). Dysregulation of these phospholipids, particularly through oxidative damage or genetic defects in remodeling enzymes like tafazzin, is a hallmark of Barth syndrome and contributes to the progression of heart failure and neurodegenerative diseases (Chavez et al., 2020). Therapeutic agents such as elamipretide (SS-31) target these phospholipids by binding to cardiolipin, thereby preventing its peroxidation and stabilizing the IMM to enhance ATP synthesis and reduce reactive oxygen species (Szeto, 2014). Consequently, these lipids represent a critical therapeutic target for restoring mitochondrial bioenergetics and preventing cell death in various metabolic and age-related pathologies.

Other names

Mitochondrial lipidsInner mitochondrial membrane phospholipidsCardiolipinPhosphatidylethanolaminePhosphatidylcholinePhosphatidylinositol

Stabilization of cardiolipin-protein complexes, prevention of cardiolipin peroxidation, and maintenance of mitochondrial membrane curvature and cristae structure (Szeto, 2014; Mejia & Hatch, 2016).