AIM： To investigate the effects of electrical stimulation of hypothalamic paraventricular nuclei （PVN） on gastric mucosal cellular apoptosis and proliferation induced by gastric ischemia/reperfusion （I/R） injury....AIM： To investigate the effects of electrical stimulation of hypothalamic paraventricular nuclei （PVN） on gastric mucosal cellular apoptosis and proliferation induced by gastric ischemia/reperfusion （I/R） injury. METHODS： For different experimental purposes, stimulating electrode plantation or electrolytic destruction of the PVN was applied, then the animals＇ GI/R injury model was established by clamping the celiac artery for 30 min and allowing reperfusing the artery for 30 rain, 1 h, 3 h or 6 h respectively. Then histological, immunohistochemistry methods were used to assess the gastric mucosal damage index, the gastric mucosal cellular apoptosis and proliferation at different times. RESULTS： The electrical stimulation of PVN significantly attenuated the GI/R injury at 30 min, i h and 3 h after reperfusion. The electrical stimulation of PVN decreased gastric mucosal apoptosis and increased gastric mucosal proliferation. The electrolytic destruction of the PVN could eliminate the protective effects of electrical stimulation of PVN on GI/R injury. These results indicated that the PVN participated in the regulation of GI/R injury as a specific area in the brain, exerting protective effects against the GI/R injury, and the protection was associated with the inhibition of cellular apoptosis and the promotion of gastric mucosal proliferation. CONCLUSION： Stimulating PVN significantly inhibits the gastric mucosal cellular apoptosis and promots gastric mucosal cellular proliferation. This may explain the protective mechanisms of electrical stimulation of PVN against GI/R injury.展开更多
基金grants from the National Natural Science Foundation of China, No. 30370533, 30570671the Educational Department Science Research Foundation of Jiangsu Province, No. 99KJB310005,05KJB310134
文摘AIM： To investigate the effects of electrical stimulation of hypothalamic paraventricular nuclei （PVN） on gastric mucosal cellular apoptosis and proliferation induced by gastric ischemia/reperfusion （I/R） injury. METHODS： For different experimental purposes, stimulating electrode plantation or electrolytic destruction of the PVN was applied, then the animals＇ GI/R injury model was established by clamping the celiac artery for 30 min and allowing reperfusing the artery for 30 rain, 1 h, 3 h or 6 h respectively. Then histological, immunohistochemistry methods were used to assess the gastric mucosal damage index, the gastric mucosal cellular apoptosis and proliferation at different times. RESULTS： The electrical stimulation of PVN significantly attenuated the GI/R injury at 30 min, i h and 3 h after reperfusion. The electrical stimulation of PVN decreased gastric mucosal apoptosis and increased gastric mucosal proliferation. The electrolytic destruction of the PVN could eliminate the protective effects of electrical stimulation of PVN on GI/R injury. These results indicated that the PVN participated in the regulation of GI/R injury as a specific area in the brain, exerting protective effects against the GI/R injury, and the protection was associated with the inhibition of cellular apoptosis and the promotion of gastric mucosal proliferation. CONCLUSION： Stimulating PVN significantly inhibits the gastric mucosal cellular apoptosis and promots gastric mucosal cellular proliferation. This may explain the protective mechanisms of electrical stimulation of PVN against GI/R injury.
文摘目的:观察褪黑激素受体1(melatonin receptor1,MT1-R)免疫反应在无蹼壁虎全脑分布。方法:我们采用苏木素染色和免疫组化的方法。结果:发现无蹼壁虎全脑的MT1-R免疫阳性细胞主要定位于下丘脑室旁核(paraventric-ular nuclei,PVN);在下丘脑外侧区(lateral hypothalamic area,LHA)、大脑皮层后连合核(nucleus of the posterior pallialcommissure,NPPC)也有少数分布,且MT1-R免疫阳性反应只存在于细胞膜。另外,在中脑观察到视网膜-下丘脑纤维束的MT1-R免疫阳性反应,并呈两侧不对称分布。结论:提示无蹼壁虎的PVN可能是褪黑激素经MT1-R介导调节生物节律的主要部位。
