The protective effect of erythropoietin on neonatal rats' retinal neurons injured by glutamic acid / 中国药理学通报

ABSTRACT

Aim To investigate the protective effect of erythropoietin(EPO )on neonatal rats'retinal neuronal cells injured by glutamic acid.Methods Retinal neuron cells were cultured and subjected to glutamic acid.The concentration of glutamic acid model was decided by observing the changes of neuronal cells with the releasing quantity of LDH and transmission electron microscope.Then cultured cells were divided into N group(normalcontral),G group(glutamic acid),EG group(EPO and glutamic acid),AG group(AG490 and glutamic acid),and AEG group(AG490,EPO and glutamic acid).MTT assay was applied to detect cell viability in five groups.The expression of Bax was detected with Western blot.Results The changes of mitochondrion and chromatin occurred in 50 ?mol?L-1 group and striking changes occurred in 100 ?mol?L-1 group with transmission electron microscope.There was apparent damage in 20?mol?L-1 group by the releasing quantity of LDH.MTT assay indicated the cell viability of EG group was higher than that of G,AG and AEG group,while,G group cell viability was higher than that of AG and AEG group.The expression of Bax in AG and AEG group was higher than that in G group. And that in G group was higher than in EG group.Conclusions EPO pretreatment can effectively protect the neuronal cells from injuries induced by glutamic acid.Down regulation of Bax and decrease of apoptosis through Jak2 passageway may be the mechanism of protection.