PINK1 and acute kidney injury: SP restored mitophagy flux by increasing microtubule-associated protein light chain 3 (LC3II/LC3I) ratio and PTEN-induced putative kinase 1 (PINK-1) levels, promoting p62 clearance, and downregulating the mitochondrial stress marker, activating transcription factor 5 (ATF5), relative to the untreated AKI groups.