Occlusion of the common carotid artery(CCA) is rare. CCA occlusion(CCAO) can present as drowsiness and right hemiplegia related to emboli after total arch replacement. Although we selected a follow-up at first because...Occlusion of the common carotid artery(CCA) is rare. CCA occlusion(CCAO) can present as drowsiness and right hemiplegia related to emboli after total arch replacement. Although we selected a follow-up at first because color duplex sonography showed retrograde flow from the left external carotid artery to the internal carotid artery, this patient had epilepsy and single-photon emission computed tomography(SPECT) acquired quantitative results of actual brain perfusion and showed insufficient collateral blood flow. To improve brain perfusion, we performed a bypass of the left subclavian artery to left CCA bypass. Postoperatively, the patient did not have epilepsy and drowsiness. Also, right hemiplegia improved enough for him to walk with support. SPECT showed increased left cerebral flow(the asymmetry ratio was 71% to 81%). Evaluation of the carotid artery with color duplex sonography alone was insufficient when CCAO showed retrograde or collateral flow. We should have performed quantitative evaluation with SPECT at the same time.展开更多
目的探讨山奈酚(kaempferol,KAE)对慢性脑缺血大鼠的作用及其机制。方法采用双侧颈总动脉永久性结扎(bilateral common carotid arteries occlusion,2VO)建立大鼠慢性脑缺血动物模型;Morris水迷宫、抓握实验检测大鼠行为学;尼氏染色及H...目的探讨山奈酚(kaempferol,KAE)对慢性脑缺血大鼠的作用及其机制。方法采用双侧颈总动脉永久性结扎(bilateral common carotid arteries occlusion,2VO)建立大鼠慢性脑缺血动物模型;Morris水迷宫、抓握实验检测大鼠行为学;尼氏染色及HE染色观察脑组织病理改变;比色法检测MDA含量和SOD活性;Western blot检测脑组织DJ-1蛋白表达水平。结果与2-VO模型组比较,KAE明显改善慢性脑缺血诱导的学习记忆障碍和抓握能力损伤。此外,KAE明显减轻2VO大鼠脑组织病理损伤,增高脑组织中SOD活性,提高海马和皮层中抗氧化蛋白DJ-1的表达水平。结论KAE明显改善慢性脑缺血诱导的大鼠认知功能障碍、四肢平衡能力障碍及病理损伤,其机制可能与提高体内抗氧化系统有关。展开更多
目的检测慢性脑灌注不足大鼠海马组织单磷酸腺苷活化蛋白激酶(adenosine monophosphate-activated protein kinase,AMPK)水平的变化,探讨加减薯蓣丸对海马神经细胞损伤的影响及其作用机制。方法采用改良双侧颈总动脉阻断法复制慢性脑灌...目的检测慢性脑灌注不足大鼠海马组织单磷酸腺苷活化蛋白激酶(adenosine monophosphate-activated protein kinase,AMPK)水平的变化,探讨加减薯蓣丸对海马神经细胞损伤的影响及其作用机制。方法采用改良双侧颈总动脉阻断法复制慢性脑灌注不足模型,应用尼氏染色检测神经细胞损伤情况,应用Western blot法检测海马区AMPK及p-AMPK表达水平。结果与正常组比较,模型组大鼠海马CA1区的尼氏染色较浅,神经锥体细胞数减少,海马组织p-AMPK表达水平明显升高(P<0.05);与模型组比较,中药组与西药组大鼠海马CA1区的尼氏染色加深,锥体细胞数量增加,p-AMPK表达水平明显下降(P<0.05);中药组与西药组大鼠海马CA1区AMPK和p-AMPK表达水平比较,差异均无统计学意义(P>0.05)。结论大鼠慢性脑灌注不足损伤后,AMPK过度激活,出现海马神经细胞损伤,加减薯蓣丸可抑制海马区AMPK的激活,减轻海马神经损伤。展开更多
Resveratrol possesses beneficial biological effects, which include anti-oxidant, anti-inflammatory and anti-carcinogenic properties. Recently, resveratrol has been shown to exhibit neuroprotective effects in models of...Resveratrol possesses beneficial biological effects, which include anti-oxidant, anti-inflammatory and anti-carcinogenic properties. Recently, resveratrol has been shown to exhibit neuroprotective effects in models of Parkinson＇s disease, cerebral ischemia and Alzheimer＇s disease. However, its effects on vascular dementia remain unclear. The present study established a rat model of vascular dementia using permanent bilateral common carotid artery occlusion. At 8-12 weeks after model induction, rats were intragastrically administered 25 mg/kg resveratrol daily. Our results found that resveratrol shortened the escape latency and escape distances in the Morris water maze, and pro- longed the time spent percentage and swimming distance percentage in the target quadrant during the probe test, indicating that resveratrol improved learning and memory ability in vascular dementia rats. Further experiments found that resveratrol decreased malonyldialdehyde levels, and increased superoxide dismutase activity and glutathione levels in the hippocampus and cerebral cortex of vascular dementia rats. These results confirmed that the neuroprotective effects of resveratrol on vascular dementia were associated with its anti-oxidant properties.展开更多
文摘Occlusion of the common carotid artery(CCA) is rare. CCA occlusion(CCAO) can present as drowsiness and right hemiplegia related to emboli after total arch replacement. Although we selected a follow-up at first because color duplex sonography showed retrograde flow from the left external carotid artery to the internal carotid artery, this patient had epilepsy and single-photon emission computed tomography(SPECT) acquired quantitative results of actual brain perfusion and showed insufficient collateral blood flow. To improve brain perfusion, we performed a bypass of the left subclavian artery to left CCA bypass. Postoperatively, the patient did not have epilepsy and drowsiness. Also, right hemiplegia improved enough for him to walk with support. SPECT showed increased left cerebral flow(the asymmetry ratio was 71% to 81%). Evaluation of the carotid artery with color duplex sonography alone was insufficient when CCAO showed retrograde or collateral flow. We should have performed quantitative evaluation with SPECT at the same time.
文摘目的检测慢性脑灌注不足大鼠海马组织单磷酸腺苷活化蛋白激酶(adenosine monophosphate-activated protein kinase,AMPK)水平的变化,探讨加减薯蓣丸对海马神经细胞损伤的影响及其作用机制。方法采用改良双侧颈总动脉阻断法复制慢性脑灌注不足模型,应用尼氏染色检测神经细胞损伤情况,应用Western blot法检测海马区AMPK及p-AMPK表达水平。结果与正常组比较,模型组大鼠海马CA1区的尼氏染色较浅,神经锥体细胞数减少,海马组织p-AMPK表达水平明显升高(P<0.05);与模型组比较,中药组与西药组大鼠海马CA1区的尼氏染色加深,锥体细胞数量增加,p-AMPK表达水平明显下降(P<0.05);中药组与西药组大鼠海马CA1区AMPK和p-AMPK表达水平比较,差异均无统计学意义(P>0.05)。结论大鼠慢性脑灌注不足损伤后,AMPK过度激活,出现海马神经细胞损伤,加减薯蓣丸可抑制海马区AMPK的激活,减轻海马神经损伤。
文摘Resveratrol possesses beneficial biological effects, which include anti-oxidant, anti-inflammatory and anti-carcinogenic properties. Recently, resveratrol has been shown to exhibit neuroprotective effects in models of Parkinson＇s disease, cerebral ischemia and Alzheimer＇s disease. However, its effects on vascular dementia remain unclear. The present study established a rat model of vascular dementia using permanent bilateral common carotid artery occlusion. At 8-12 weeks after model induction, rats were intragastrically administered 25 mg/kg resveratrol daily. Our results found that resveratrol shortened the escape latency and escape distances in the Morris water maze, and pro- longed the time spent percentage and swimming distance percentage in the target quadrant during the probe test, indicating that resveratrol improved learning and memory ability in vascular dementia rats. Further experiments found that resveratrol decreased malonyldialdehyde levels, and increased superoxide dismutase activity and glutathione levels in the hippocampus and cerebral cortex of vascular dementia rats. These results confirmed that the neuroprotective effects of resveratrol on vascular dementia were associated with its anti-oxidant properties.
