TSPO ligand-1 has affinity for peripheral and central benzodiazepine receptors.TSPO ligand-1 is an AUTAC4-binding protein in the transmembrane domain of the outer mitochondrial membrane, which induces mitochondrial autophagy and promotes intracellular mitochondrial regeneration.TSPO ligand-1 is involved in intracellular cholesterol transport, and can be used as a biomarker for brain injury and neurodegeneration. TSPO ligand-1 is involved in intracellular cholesterol transport and can be used as a biomarker for brain damage and neurodegeneration.