6-羟褪黑素 1. Objectives To study the protective effect of exogenous melatonin (Mel) and6-hydroxylmelatonin(6-OHMel) on neu-rons following exposure to oxygen-glucose-serum deprivation (OGSD) insults. 目的研究褪黑素(Mel)和6-羟褪黑素(6-OHMel)神经保护作用及作用机理。