目的探讨细胞增殖与细胞凋亡在贲门癌发生发展中的作用。方法应用免疫组化法检测PC N A、p53、Bcl-2在30例贲门癌、10例胃溃疡胃壁组织中的表达和分布,采用病理图像分析的方法进行灰度检测,并对胃壁上皮组织或癌组织中凋亡细胞进行计数...目的探讨细胞增殖与细胞凋亡在贲门癌发生发展中的作用。方法应用免疫组化法检测PC N A、p53、Bcl-2在30例贲门癌、10例胃溃疡胃壁组织中的表达和分布,采用病理图像分析的方法进行灰度检测,并对胃壁上皮组织或癌组织中凋亡细胞进行计数。结果观察和比较自胃远端切缘、癌旁至癌灶等胃壁组织中的变化,发现PC N A呈显著的增高趋势,癌灶组织中PC N A呈强阳性表达;p53在正常胃黏膜组织中不表达,在癌灶组织中呈强阳性表达;Bcl-2在癌旁组织中呈强阳性表达,显著高于癌灶组织;细胞凋亡指数在癌灶组织中显著降低。胃溃疡病灶边缘的胃黏膜组织PC N A呈阳性表达,p53呈阴性表达,Bc1-2呈弱阳性表达,细胞凋亡指数显著增高。结论在非典型增生的贲门黏膜组织中,细胞增殖和细胞凋亡均非常活跃,而一旦细胞凋亡受到严重抑制,即可导致贲门癌的发生。展开更多
Objective： To explore the effect of electroacupuncture （EA） on the pathomorphology of the sciatic nerve and the role of P2X3 receptors in EA analgesia. Methods： The chronic constriction injury （CCI） model was ad...Objective： To explore the effect of electroacupuncture （EA） on the pathomorphology of the sciatic nerve and the role of P2X3 receptors in EA analgesia. Methods： The chronic constriction injury （CCI） model was adopted in this study. A total of 32 rats were randomly divided into four groups： sham CCI, CCI, CCI plus contralateral EA （CCI ＋ conEA） and CCI plus ipsilateral EA （CCI ＋ ipsEA）. Mechanical withdrawal threshold （MWT） and thermal withdrawal latency OWL） were measured. EA began at day 7 after the CCI operation and was applied to the Zusanli （ST 36） and Yanglingquan acupoints （GB 34）. At day 14, the pathomorphologic changes of the operated sciatic nerve were demonstrated by hematoxylin and eosin staining. In addition, dorsal root ganglion （DRG） neurons isolated from rats were examined by electrophysiological recording to determine if the P2X3 receptor agonists, adenosine 5＇-tdphosphate disodium （ATP） and α, 13 -methylen-ATP （or, 13 -meATP） evoked inward currents. Results： Pain thresholds in the CCI group were obviously decreased post CCI surgery （P〈0.01）. In the EA groups, thermal and mechanical threshold values were increased after the last EA treatment （P〈0.05, P〈0.01）. There was no significant difference in light microscopic examination among the four groups （P〉0.05）. Current amplitude after application of ATP and or, 13 -meATP in DRG neurons were much larger in the CCI group compared to those obtained in sham CCI （P〈0.05）. ATP and α, 13 -meATP invoked amplitudes in the CCI ＋ EA groups were reduced. There was no significant difference between the CCI ＋ conEA group and the CCI ＋ ipsEA group （P〉0.05）. Conclusion： EA analgesia may be mediated by decreasing the response of P2X8 receptors to the agonists ATP and or, 13 -meATP in the DRG of rats with CCI. No pathological changes of the sciatic nerve of rats were observed after EA treatment.展开更多
文摘目的探讨细胞增殖与细胞凋亡在贲门癌发生发展中的作用。方法应用免疫组化法检测PC N A、p53、Bcl-2在30例贲门癌、10例胃溃疡胃壁组织中的表达和分布,采用病理图像分析的方法进行灰度检测,并对胃壁上皮组织或癌组织中凋亡细胞进行计数。结果观察和比较自胃远端切缘、癌旁至癌灶等胃壁组织中的变化,发现PC N A呈显著的增高趋势,癌灶组织中PC N A呈强阳性表达;p53在正常胃黏膜组织中不表达,在癌灶组织中呈强阳性表达;Bcl-2在癌旁组织中呈强阳性表达,显著高于癌灶组织;细胞凋亡指数在癌灶组织中显著降低。胃溃疡病灶边缘的胃黏膜组织PC N A呈阳性表达,p53呈阴性表达,Bc1-2呈弱阳性表达,细胞凋亡指数显著增高。结论在非典型增生的贲门黏膜组织中,细胞增殖和细胞凋亡均非常活跃,而一旦细胞凋亡受到严重抑制,即可导致贲门癌的发生。
基金Supported by the National Natural Science Foundation of China (No.30901924)
文摘Objective： To explore the effect of electroacupuncture （EA） on the pathomorphology of the sciatic nerve and the role of P2X3 receptors in EA analgesia. Methods： The chronic constriction injury （CCI） model was adopted in this study. A total of 32 rats were randomly divided into four groups： sham CCI, CCI, CCI plus contralateral EA （CCI ＋ conEA） and CCI plus ipsilateral EA （CCI ＋ ipsEA）. Mechanical withdrawal threshold （MWT） and thermal withdrawal latency OWL） were measured. EA began at day 7 after the CCI operation and was applied to the Zusanli （ST 36） and Yanglingquan acupoints （GB 34）. At day 14, the pathomorphologic changes of the operated sciatic nerve were demonstrated by hematoxylin and eosin staining. In addition, dorsal root ganglion （DRG） neurons isolated from rats were examined by electrophysiological recording to determine if the P2X3 receptor agonists, adenosine 5＇-tdphosphate disodium （ATP） and α, 13 -methylen-ATP （or, 13 -meATP） evoked inward currents. Results： Pain thresholds in the CCI group were obviously decreased post CCI surgery （P〈0.01）. In the EA groups, thermal and mechanical threshold values were increased after the last EA treatment （P〈0.05, P〈0.01）. There was no significant difference in light microscopic examination among the four groups （P〉0.05）. Current amplitude after application of ATP and or, 13 -meATP in DRG neurons were much larger in the CCI group compared to those obtained in sham CCI （P〈0.05）. ATP and α, 13 -meATP invoked amplitudes in the CCI ＋ EA groups were reduced. There was no significant difference between the CCI ＋ conEA group and the CCI ＋ ipsEA group （P〉0.05）. Conclusion： EA analgesia may be mediated by decreasing the response of P2X8 receptors to the agonists ATP and or, 13 -meATP in the DRG of rats with CCI. No pathological changes of the sciatic nerve of rats were observed after EA treatment.
