In the present study we injected colchicine into the lateral ventricle of Sprague-Dawley rats to investigate the effects of colchicine on the number of different-type neurons in the basal forebrain and to search for n...In the present study we injected colchicine into the lateral ventricle of Sprague-Dawley rats to investigate the effects of colchicine on the number of different-type neurons in the basal forebrain and to search for neurons resistant to injury. After colchicine injection, the number of nestin^＋ cholinergic neurons was decreased at 1 day, but increased at 3 days and peaked at 14-28 days. The quantity of nestincholinergic neurons, parvalbumin-positive neurons and choline acetyl transferase-positive neurons decreased gradually. Our results indicate that nestin^＋ cholinergic neurons possess better tolerance to colchicine-induced neurotoxicity.展开更多
The present study established a rat model of chronic intermittent hypoxia （CIH） to simulate obstructive sleep apnea syndrome. CIH rats were evaluated for cognitive function using the Morris water maze, and neuronal ...The present study established a rat model of chronic intermittent hypoxia （CIH） to simulate obstructive sleep apnea syndrome. CIH rats were evaluated for cognitive function using the Morris water maze, and neuronal pathology in the hippocampus was observed using hematoxylin-eosin staining. In addition, hippocampal choline acetyl transferase （CHAT） and nicotinic acetylcholine receptor （nAChR） expression was determined by immunohistochemistry. Our results revealed necrotic hippocampal neurons, decreased ChAT and nAChR expression, as well as cognitive impairment in CIH rats. These results suggest that hippocampal neuronal necrosis and decreased cholinerqic activity may be involved in CIH-induced cognitive impairment in rats.展开更多
目的观察霍乱毒素B亚单位(cholera toxin B subunit,CB)与神经生长因子(NGF)耦联制剂滴鼻治疗对拟痴呆小鼠学习记忆能力及胆碱能神经系统的影响。方法用改进的过碘酸钠法使CB-NGF耦联,滴鼻治疗脑室内注射β样淀粉蛋白(Aβ25-35)的拟AD...目的观察霍乱毒素B亚单位(cholera toxin B subunit,CB)与神经生长因子(NGF)耦联制剂滴鼻治疗对拟痴呆小鼠学习记忆能力及胆碱能神经系统的影响。方法用改进的过碘酸钠法使CB-NGF耦联,滴鼻治疗脑室内注射β样淀粉蛋白(Aβ25-35)的拟AD小鼠模型;CB-NGF7.5μg/d、15μg/d滴鼻治疗7d,Morris水迷宫检测其空间学习记忆能力;免疫组织化学染色胆碱乙酰化酶(ChAT)。结果未经治疗的模型鼠寻台潜伏期明显延长(P<0.01);在安全岛所在象限的停留时间明显缩短,斜角带区ChAT阳性细胞数量显著减少(P<0.001)。NGF及CB-NGF滴鼻治疗组寻台潜伏期有所缩短,在安全岛象限内的停留时间比模型组明显延长(P<0.01);基底前脑斜角带区ChAT染色明显增多(P<0.01)。结论CB-NGF滴鼻治疗可改善痴呆小鼠的空间认知能力,与其保护胆碱能神经有关。展开更多
Nestin＋ neurons have been shown to express choline acetyltransferase （CHAT） in the medial septum-diagonal band of Broca in adult rats. This study explored the projection of nestin＋ neu-rons to the olfactory bulb a...Nestin＋ neurons have been shown to express choline acetyltransferase （CHAT） in the medial septum-diagonal band of Broca in adult rats. This study explored the projection of nestin＋ neu-rons to the olfactory bulb and the time course of nestin＋ neurons in the medial septum-diagonal band of Broca in adult rats during injury recovery after olfactory nerve transection. This study observed that all nestin＋ neurons were double-labeled with ChAT in the medial septum-diagonal band of Broca. Approximately 53.6% of nestin~ neurons were projected to the olfactory bulb and co-labeled with fast blue. A large number of nestin~ neurons were not present in each region of the medial septum-diagonal band of Broca. Nestin＋ neurons in the medial septum and vertical limb of the diagonal band of Broca showed obvious compensatory function. The number of nestin＋ neurons decreased to a minimum later than nestin/CHAT＋ neurons in the medial sep- turn-diagonal band of Broca. The results suggest that nestin＋ cholinergic neurons may have a closer connection to olfactory bulb neurons. Nestin＋ cholinergic neurons may have a stronger tolerance to injury than Nestin/CHAT＋ neurons. The difference between nestin＋ and nestin-/ ChAT＋ neurons during the recovery process requires further investigations.展开更多
基金the National Natural Science Foundation of China,No. 30700436
文摘In the present study we injected colchicine into the lateral ventricle of Sprague-Dawley rats to investigate the effects of colchicine on the number of different-type neurons in the basal forebrain and to search for neurons resistant to injury. After colchicine injection, the number of nestin^＋ cholinergic neurons was decreased at 1 day, but increased at 3 days and peaked at 14-28 days. The quantity of nestincholinergic neurons, parvalbumin-positive neurons and choline acetyl transferase-positive neurons decreased gradually. Our results indicate that nestin^＋ cholinergic neurons possess better tolerance to colchicine-induced neurotoxicity.
文摘The present study established a rat model of chronic intermittent hypoxia （CIH） to simulate obstructive sleep apnea syndrome. CIH rats were evaluated for cognitive function using the Morris water maze, and neuronal pathology in the hippocampus was observed using hematoxylin-eosin staining. In addition, hippocampal choline acetyl transferase （CHAT） and nicotinic acetylcholine receptor （nAChR） expression was determined by immunohistochemistry. Our results revealed necrotic hippocampal neurons, decreased ChAT and nAChR expression, as well as cognitive impairment in CIH rats. These results suggest that hippocampal neuronal necrosis and decreased cholinerqic activity may be involved in CIH-induced cognitive impairment in rats.
文摘目的观察霍乱毒素B亚单位(cholera toxin B subunit,CB)与神经生长因子(NGF)耦联制剂滴鼻治疗对拟痴呆小鼠学习记忆能力及胆碱能神经系统的影响。方法用改进的过碘酸钠法使CB-NGF耦联,滴鼻治疗脑室内注射β样淀粉蛋白(Aβ25-35)的拟AD小鼠模型;CB-NGF7.5μg/d、15μg/d滴鼻治疗7d,Morris水迷宫检测其空间学习记忆能力;免疫组织化学染色胆碱乙酰化酶(ChAT)。结果未经治疗的模型鼠寻台潜伏期明显延长(P<0.01);在安全岛所在象限的停留时间明显缩短,斜角带区ChAT阳性细胞数量显著减少(P<0.001)。NGF及CB-NGF滴鼻治疗组寻台潜伏期有所缩短,在安全岛象限内的停留时间比模型组明显延长(P<0.01);基底前脑斜角带区ChAT染色明显增多(P<0.01)。结论CB-NGF滴鼻治疗可改善痴呆小鼠的空间认知能力,与其保护胆碱能神经有关。
基金the Guangdong Natural Science Foundation of China,No.S2011040004372the Fundamental Research Funds for the Central Universities,No.11ykpy05
文摘Nestin＋ neurons have been shown to express choline acetyltransferase （CHAT） in the medial septum-diagonal band of Broca in adult rats. This study explored the projection of nestin＋ neu-rons to the olfactory bulb and the time course of nestin＋ neurons in the medial septum-diagonal band of Broca in adult rats during injury recovery after olfactory nerve transection. This study observed that all nestin＋ neurons were double-labeled with ChAT in the medial septum-diagonal band of Broca. Approximately 53.6% of nestin~ neurons were projected to the olfactory bulb and co-labeled with fast blue. A large number of nestin~ neurons were not present in each region of the medial septum-diagonal band of Broca. Nestin＋ neurons in the medial septum and vertical limb of the diagonal band of Broca showed obvious compensatory function. The number of nestin＋ neurons decreased to a minimum later than nestin/CHAT＋ neurons in the medial sep- turn-diagonal band of Broca. The results suggest that nestin＋ cholinergic neurons may have a closer connection to olfactory bulb neurons. Nestin＋ cholinergic neurons may have a stronger tolerance to injury than Nestin/CHAT＋ neurons. The difference between nestin＋ and nestin-/ ChAT＋ neurons during the recovery process requires further investigations.
