SS-31 (Elamipretide)

SS-31 (elamipretide; Bendavia) is a cell-permeable Szeto-Schiller tetrapeptide that selectively targets the inner mitochondrial membrane. The peptide binds cardiolipin — a phospholipid uniquely concentrated in the inner mitochondrial membrane — with high affinity, anchoring the compound at the site of the electron transport chain.

Cardiolipin binding stabilizes the supercomplex organization of respiratory chain Complexes I, III, and IV, improves electron transport coupling, reduces electron leak, and decreases mitochondrial reactive oxygen species generation. The functional consequence in preclinical models is improved ATP production, preserved mitochondrial cristae structure, and reduced oxidative stress.

Clinical development has focused on primary mitochondrial myopathies, ischemia-reperfusion injury, and age-related muscle and ocular disorders. The compound is an extensively studied tool in mitochondrial bioenergetics research.

Research Applications

• Mitochondrial bioenergetics and electron transport chain research.
• Ischemia-reperfusion injury models (cardiac, renal).
• Skeletal muscle and primary mitochondrial myopathy research.
• Cardiolipin biology and inner-membrane structural studies.