Gastric cancer(GC) is one of the leading causes of cancer related death in the world, particularly in East Asia. According to the Correa's cancer cascade, noncardia GC is usually developed through a series of muco...Gastric cancer(GC) is one of the leading causes of cancer related death in the world, particularly in East Asia. According to the Correa's cancer cascade, noncardia GC is usually developed through a series of mucosal changes from non-atrophic gastritis to atrophic gastritis(AG), intestinal metaplasia(IM), dysplasia and adenocarcinoma. Atrophic gastritis and IM are therefore generally considered to be pre-neoplastic gastric lesions. Helicobacter pylori(H. pylori) infection is an important initiating and promoting step of this gastric carcinogenesis cascade. Emerging long-term data showed that eradication of H. pylori reduced the risk of subsequent cancer development. It however remains confusing whether eradication of the bacterium in individuals with pre-neoplastic gastric lesions could regress these changes as well as in preventing cancer. Whilst H. pylori eradication could likely regress AG, the presence of IM may be a point of no return in this cascade. Hence, surveillance by endoscopy may be indicated in those with extensive IM or those with incomplete IM, particularly in populations with high GC risk. The optimal interval and the best tool of surveillance endoscopy remains to be determined in future studies.展开更多
Atfer examining 88 gastropathic patieiits with Spleen deficiency syndrome by iJsing transmis-sion electron microscope, X-ray energy disperse analysis system, histochemical staining and radioimmunomethods, the authors ...Atfer examining 88 gastropathic patieiits with Spleen deficiency syndrome by iJsing transmis-sion electron microscope, X-ray energy disperse analysis system, histochemical staining and radioimmunomethods, the authors found that the gastric mucosa cyclic adenosine monophosphate, superoxide dismutaselevel, quantity of mitochondria and its crista, the ratio of diameter between ventricle and cavity of mitochon-dria aiid the conteiit ot zinc (Zn) , copper (Cu) of mitochondria were decreasing to certain extent which tendsto get lower and lower with different groups in the order of health coritrol group, Spleen Qi deficiency groupaiid SPIeen deficiency with Qi stagnation group; chronic superficial gastritis group, chronic atrophic gastritisgroup and gastric cancor group , complete small intestinal metaplasia (IM) group, incomplete small iM group,complete colonic iM groiJp and incomplete colonic iM group (P< 0 . 05￣0 . 001 ) . While tlie degeiieratiori rateof mitochondria, Cu/Zn ratio, metaplasia rate of gastric mucosa, rate of incomplete colonic IM and content ofIipid peroxide were increasing in the above order (P < 0 . 05 ￣0 . 001 ) . It is suggested that tlie comprehensiveeffect ot the degeneration of mitochoridria and the quantitative changes of its correlative factors is the phys-iopathologic base for indecing SPIeen deficiency disease, gastric mucosa iM and canceration.展开更多
文摘Gastric cancer(GC) is one of the leading causes of cancer related death in the world, particularly in East Asia. According to the Correa's cancer cascade, noncardia GC is usually developed through a series of mucosal changes from non-atrophic gastritis to atrophic gastritis(AG), intestinal metaplasia(IM), dysplasia and adenocarcinoma. Atrophic gastritis and IM are therefore generally considered to be pre-neoplastic gastric lesions. Helicobacter pylori(H. pylori) infection is an important initiating and promoting step of this gastric carcinogenesis cascade. Emerging long-term data showed that eradication of H. pylori reduced the risk of subsequent cancer development. It however remains confusing whether eradication of the bacterium in individuals with pre-neoplastic gastric lesions could regress these changes as well as in preventing cancer. Whilst H. pylori eradication could likely regress AG, the presence of IM may be a point of no return in this cascade. Hence, surveillance by endoscopy may be indicated in those with extensive IM or those with incomplete IM, particularly in populations with high GC risk. The optimal interval and the best tool of surveillance endoscopy remains to be determined in future studies.
文摘Atfer examining 88 gastropathic patieiits with Spleen deficiency syndrome by iJsing transmis-sion electron microscope, X-ray energy disperse analysis system, histochemical staining and radioimmunomethods, the authors found that the gastric mucosa cyclic adenosine monophosphate, superoxide dismutaselevel, quantity of mitochondria and its crista, the ratio of diameter between ventricle and cavity of mitochon-dria aiid the conteiit ot zinc (Zn) , copper (Cu) of mitochondria were decreasing to certain extent which tendsto get lower and lower with different groups in the order of health coritrol group, Spleen Qi deficiency groupaiid SPIeen deficiency with Qi stagnation group; chronic superficial gastritis group, chronic atrophic gastritisgroup and gastric cancor group , complete small intestinal metaplasia (IM) group, incomplete small iM group,complete colonic iM groiJp and incomplete colonic iM group (P< 0 . 05￣0 . 001 ) . While tlie degeiieratiori rateof mitochondria, Cu/Zn ratio, metaplasia rate of gastric mucosa, rate of incomplete colonic IM and content ofIipid peroxide were increasing in the above order (P < 0 . 05 ￣0 . 001 ) . It is suggested that tlie comprehensiveeffect ot the degeneration of mitochoridria and the quantitative changes of its correlative factors is the phys-iopathologic base for indecing SPIeen deficiency disease, gastric mucosa iM and canceration.
