The present invention includes a method for preventing or treating a disease or condition with excessive fragmentation of mitochondria or mitochondrial dysfunction comprising, consisting essentially of, or consisting of: identifying a subject suspected of needing treatment for excessive fragmentation of mitochondria or mitochondrial dysfunction； and administering to the subject with an amount of a mitochondrial division inhibitor 1 sufficient to prevent or treat the excessive fragmentation of mitochondria or mitochondrial dysfunction.
