Effects of exosomes on mitochondrial membrane potential and expression of mitochondrial function-associated genes. A, B: the mitochondrial membrane potential was described as the ratio of red to green fluorescence; C-K: effects of exosomes on the expression of mitochondrial function-associated genes in hippocampal neurons after oxygen-glucose deprivation/reperfusion (OGD/R)-induced injury. Compared with the control group, *P<0.05, **P<0.01; compared with the OGD/R group, #P<0.05, ##P<0.01.