目的探讨重组人促红细胞生成素(rhEPO)对新生鼠缺氧缺血性脑损伤的神经保护作用。方法 57只7天龄新生鼠随机分为假手术对照(正常对照组)、缺氧缺血性脑损伤动物模型组(HIBD模型)、rhEPO治疗组。在建立HIBD模型后,rhEPO治疗组立即一次性...目的探讨重组人促红细胞生成素(rhEPO)对新生鼠缺氧缺血性脑损伤的神经保护作用。方法 57只7天龄新生鼠随机分为假手术对照(正常对照组)、缺氧缺血性脑损伤动物模型组(HIBD模型)、rhEPO治疗组。在建立HIBD模型后,rhEPO治疗组立即一次性腹腔注射3 000IU/kg剂量的rhEPO;HIBD模型组注射等量生理盐水;于处置后24h电镜观察脑组织病理形态学变化,流式细胞计检测脑受损局部神经元细胞凋亡情况,实验7天进行短期感觉运动反射评价。结果与正常对照组相比,HIBD模型组光镜下左侧大脑病理损伤明显;HIBD模型组神经细胞凋亡与正常对照组相比增加(28.30±4.80 vs 47.14±6.97,P<0.05),存活细胞减少(72.42±7.93 vs 48.33±8.39,P<0.05);rhEPO治疗组细胞凋亡与HIBD模型组相比减轻(47.14±6.97 vs 36.88±9.43,P<0.05),存活细胞增多(48.33±8.39 vs 60.06±8.32,P<0.05);HIBD模型组悬吊测试、翻正反射、悬崖逃避反射、趋地反射这四项反射与正常对照组相比成绩均较差,提示神经功能受损;rhEPO治疗组翻正反射及悬崖逃避反射时间与HIBD模型组相比缩短,(4.59±0.11 vs 2.84±0.13,10.84±1.26 vs 8.49±1.03,均P<0.05),以上差异均有统计学意义。结论外源性给予rhEPO能够减轻HIBD大鼠脑组织病理损伤,稳定细胞结构,抑制细胞凋亡,改善短期行为学评价,从而发挥其神经保护作用。展开更多
Neonatal hypoxic-ischemic encephalopathy is a serious neurological disease,often resulting in long-term neurodevelopmental disorders among surviving children.However,whether these neurodevelopmental issues can be pass...Neonatal hypoxic-ischemic encephalopathy is a serious neurological disease,often resulting in long-term neurodevelopmental disorders among surviving children.However,whether these neurodevelopmental issues can be passed to offspring remains unclear.The right common carotid artery of 7-day-old parental-generation rats was subjected to permanent ligation using a vessel electrocoagulator.Neonatal hypoxic-ischemic rat models were established by subjecting the rats to 8%O2–92%N2 for 2 hours.The results showed that 24 hours after hypoxia and ischemia,pathological damage,cerebral atrophy,liquefaction,and impairment were found,and Zea-Longa scores were significantly increased.The parental-generation rats were propagated at 3 months old,and offspring were obtained.No changes in the overall brain structures of these offspring rats were identified by magnetic resonance imaging.However,the escape latency was longer and the number of platform crossings was reduced among these offspring compared with normal rats.These results indicated that the offspring of hypoxic-ischemic encephalopathy model rats displayed cognitive impairments in learning and memory.This study was approved by the Animal Care&Welfare Committee of Kunming Medical University,China in 2018(approval No.kmmu2019072).展开更多
文摘目的探讨重组人促红细胞生成素(rhEPO)对新生鼠缺氧缺血性脑损伤的神经保护作用。方法 57只7天龄新生鼠随机分为假手术对照(正常对照组)、缺氧缺血性脑损伤动物模型组(HIBD模型)、rhEPO治疗组。在建立HIBD模型后,rhEPO治疗组立即一次性腹腔注射3 000IU/kg剂量的rhEPO;HIBD模型组注射等量生理盐水;于处置后24h电镜观察脑组织病理形态学变化,流式细胞计检测脑受损局部神经元细胞凋亡情况,实验7天进行短期感觉运动反射评价。结果与正常对照组相比,HIBD模型组光镜下左侧大脑病理损伤明显;HIBD模型组神经细胞凋亡与正常对照组相比增加(28.30±4.80 vs 47.14±6.97,P<0.05),存活细胞减少(72.42±7.93 vs 48.33±8.39,P<0.05);rhEPO治疗组细胞凋亡与HIBD模型组相比减轻(47.14±6.97 vs 36.88±9.43,P<0.05),存活细胞增多(48.33±8.39 vs 60.06±8.32,P<0.05);HIBD模型组悬吊测试、翻正反射、悬崖逃避反射、趋地反射这四项反射与正常对照组相比成绩均较差,提示神经功能受损;rhEPO治疗组翻正反射及悬崖逃避反射时间与HIBD模型组相比缩短,(4.59±0.11 vs 2.84±0.13,10.84±1.26 vs 8.49±1.03,均P<0.05),以上差异均有统计学意义。结论外源性给予rhEPO能够减轻HIBD大鼠脑组织病理损伤,稳定细胞结构,抑制细胞凋亡,改善短期行为学评价,从而发挥其神经保护作用。
基金supported by the National Natural Science Foundation of China,No.81560215(FW)the Innovative Research Team Program of Science and Technology in Yunnan Province of China,No.2017HC007
文摘Neonatal hypoxic-ischemic encephalopathy is a serious neurological disease,often resulting in long-term neurodevelopmental disorders among surviving children.However,whether these neurodevelopmental issues can be passed to offspring remains unclear.The right common carotid artery of 7-day-old parental-generation rats was subjected to permanent ligation using a vessel electrocoagulator.Neonatal hypoxic-ischemic rat models were established by subjecting the rats to 8%O2–92%N2 for 2 hours.The results showed that 24 hours after hypoxia and ischemia,pathological damage,cerebral atrophy,liquefaction,and impairment were found,and Zea-Longa scores were significantly increased.The parental-generation rats were propagated at 3 months old,and offspring were obtained.No changes in the overall brain structures of these offspring rats were identified by magnetic resonance imaging.However,the escape latency was longer and the number of platform crossings was reduced among these offspring compared with normal rats.These results indicated that the offspring of hypoxic-ischemic encephalopathy model rats displayed cognitive impairments in learning and memory.This study was approved by the Animal Care&Welfare Committee of Kunming Medical University,China in 2018(approval No.kmmu2019072).
