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目的观察丹参注射液对急性脊髓损伤(spinal cord injury,SCI)大鼠的脊髓灰质胶源性神经营养因子(glial cell line-derived neurotrophic factor,GDNF)的作用,并探讨其机制。方法将144只SD雄性大鼠制作成SCI模型,随机分为治疗组、对照组及SCI组(每组各48只),其中治疗组给予腹腔注射丹参注射液[1.78mL,(kg·天)],对照组腹腔注射大剂量甲基强地松龙[30mg/(kg·23h),45min后按5.4mg/(kg