Objective To observe The effect of the velvet antler polypeptides on caspase-3、Bax、Bcl-2 of spinal nerve cell induced by radiation.Method:the spinal nerve cell are divided control group,velvet antler polypeptide group,NGF group,radiation group after 2Gy irradiate.The immunohistochemistry detects the change of caspase-3、Bax、Bcl-2.Result :The caspase-3 and Bax positive cell decreased,bcl-2 positive cells increased in velvet antler polypeptide group.The Bcl-2、Bax positive cells increased,but Bax positive cells...