Summary： Integrated resection of the pancreatic head is the most difficult step in radical pancreati- coduodenectomy （RPD） in patients with the portal vein （PV） and superior mesenteric vein （SMV） inva- sion or ...Summary： Integrated resection of the pancreatic head is the most difficult step in radical pancreati- coduodenectomy （RPD） in patients with the portal vein （PV） and superior mesenteric vein （SMV） inva- sion or oppression by the tumor. This study introduced a new idea and skill named the ＂total arterial devascularization first＂ （TADF） technique and its applications in RPD. Three arterial blood supplies of pancreatic head were obstructed before dissection of veins. The critical steps included exposure of the anterior surface of the abdominal aorta （AA） by completely transecting neural and connective tissue between superior mesenteric artery （SMA） and pancreatic mesounsinate, and transection of the mesounsinate from the origin of SMA to the root of the celiac trunk. From January 2012 through May 2013, a total of 58 patients with PV/SMV invasion or oppression underwent RPD using this technique. The median operative time was 5.1 h （ranging 4.5-8.1 h）. The median intraoperative blood loss was 450 mL （ranging 200-900 mL）. No intraoperative and postoperative bleeding of pancreatic head region oc- curred. Among the 58 patients, 21 were subjected to vessel lateral wall angiectomy or angiorrhaphy, and 10 to angiectomy and end-to-end anastomosis. The incidence of postoperative bleeding, postoperative pancreatic fistula and biliary fistula was 5.2%, 6.8%, and 1.7%, respectively. No patients died 3 months after operation. The TADF technique is a new method for intricate RPD and could improve the security of surgery and reduce intraoperative bleeding, which is expected to become standardized surgical ap- proach for RPD.展开更多
Mounting evidence has shown that side population （SP） cells are enriched for cancer stem cells （CSCs） responsible for cancer malignancy. In this study, SP technology was used to isolate a small subpopulation of SP...Mounting evidence has shown that side population （SP） cells are enriched for cancer stem cells （CSCs） responsible for cancer malignancy. In this study, SP technology was used to isolate a small subpopulation of SP cells in human gallbladder cancer cell line GBC-SD, and SP cells which had superior potential for proliferation in vitro and tumorigenesis in vivo were identified. Importantly, the abundance of GBC-SD SP cells was increased by a transforming growth factor-β （TGF-β）-induced epithelial-mesenchymal transition （EMT）, and this effect was accompanied with a strong up-regulation of ABCG2 mRNA expression, and a decreased sensitivity to mitoxantrone. SP cells were restored upon the removal of TGF-β and the reversion of the cells to an epithelial phenotype, and smad3-specific siRNA reduced SP abundance in response to TGF-β. In conclusion, TGF-β-induced EMT by smad-dependent signaling pathway promotes cancer development and anti-cancer drug resistant phenotype by augmenting the abundance of GBC-SD SP cells, and a better understanding of mechanisms involved in TGF-β-induced EMT may provide a novel strategy for preventing cancer progression.展开更多
目的探讨嗅觉受体家族2亚家族W成员3(olfactory receptor family 2 subfamily W member,OR2W3)在胰腺癌(pancreatic cancer,PC)组织中的表达及其临床意义.方法采用免疫组织化学法检测50例PC组织及癌旁组织石蜡切片中的OR2W3的表达,分析O...目的探讨嗅觉受体家族2亚家族W成员3(olfactory receptor family 2 subfamily W member,OR2W3)在胰腺癌(pancreatic cancer,PC)组织中的表达及其临床意义.方法采用免疫组织化学法检测50例PC组织及癌旁组织石蜡切片中的OR2W3的表达,分析OR2W3蛋白表达与临床病理因素的关系.结果 OR2W3蛋白在PC组织中高表达和低表达率分别为78.0%(39/50)和22.0%(11/50),而在癌旁组织中高表达和低表达率分别为12.0%(6/50)和为88.0%(44/50),两者差异有统计学意义(χ2=44.00,P<0.05).单因素分析显示OR2W3表达与PC的组织分化程度、临床分期、淋巴结转移密切相关,该3因素分组间的差异均有统计学意义(均P<0.05).结论 OR2W3的高表达可能在PC发生、发展中起重要作用.展开更多
基金supported by grants from the National Natural Science Foundation of China(No.81071775,81272659,81101621,81160311,81172064,81001068,81272425,81101870)National "Eleventh Five-Year" Scientific and Technological Support Projects(No.2006BAI02A13-402)+1 种基金Key Projects of Science Foundation of Hubei Province(No.2011CDA030)Research Fund of Young Scholars for the Doctoral Program of Higher Education of China(No.20110142120014)
文摘Summary： Integrated resection of the pancreatic head is the most difficult step in radical pancreati- coduodenectomy （RPD） in patients with the portal vein （PV） and superior mesenteric vein （SMV） inva- sion or oppression by the tumor. This study introduced a new idea and skill named the ＂total arterial devascularization first＂ （TADF） technique and its applications in RPD. Three arterial blood supplies of pancreatic head were obstructed before dissection of veins. The critical steps included exposure of the anterior surface of the abdominal aorta （AA） by completely transecting neural and connective tissue between superior mesenteric artery （SMA） and pancreatic mesounsinate, and transection of the mesounsinate from the origin of SMA to the root of the celiac trunk. From January 2012 through May 2013, a total of 58 patients with PV/SMV invasion or oppression underwent RPD using this technique. The median operative time was 5.1 h （ranging 4.5-8.1 h）. The median intraoperative blood loss was 450 mL （ranging 200-900 mL）. No intraoperative and postoperative bleeding of pancreatic head region oc- curred. Among the 58 patients, 21 were subjected to vessel lateral wall angiectomy or angiorrhaphy, and 10 to angiectomy and end-to-end anastomosis. The incidence of postoperative bleeding, postoperative pancreatic fistula and biliary fistula was 5.2%, 6.8%, and 1.7%, respectively. No patients died 3 months after operation. The TADF technique is a new method for intricate RPD and could improve the security of surgery and reduce intraoperative bleeding, which is expected to become standardized surgical ap- proach for RPD.
基金supported by a grant from the National Natural Science Foundation of China(No.30772127)
文摘Mounting evidence has shown that side population （SP） cells are enriched for cancer stem cells （CSCs） responsible for cancer malignancy. In this study, SP technology was used to isolate a small subpopulation of SP cells in human gallbladder cancer cell line GBC-SD, and SP cells which had superior potential for proliferation in vitro and tumorigenesis in vivo were identified. Importantly, the abundance of GBC-SD SP cells was increased by a transforming growth factor-β （TGF-β）-induced epithelial-mesenchymal transition （EMT）, and this effect was accompanied with a strong up-regulation of ABCG2 mRNA expression, and a decreased sensitivity to mitoxantrone. SP cells were restored upon the removal of TGF-β and the reversion of the cells to an epithelial phenotype, and smad3-specific siRNA reduced SP abundance in response to TGF-β. In conclusion, TGF-β-induced EMT by smad-dependent signaling pathway promotes cancer development and anti-cancer drug resistant phenotype by augmenting the abundance of GBC-SD SP cells, and a better understanding of mechanisms involved in TGF-β-induced EMT may provide a novel strategy for preventing cancer progression.
文摘目的探讨嗅觉受体家族2亚家族W成员3(olfactory receptor family 2 subfamily W member,OR2W3)在胰腺癌(pancreatic cancer,PC)组织中的表达及其临床意义.方法采用免疫组织化学法检测50例PC组织及癌旁组织石蜡切片中的OR2W3的表达,分析OR2W3蛋白表达与临床病理因素的关系.结果 OR2W3蛋白在PC组织中高表达和低表达率分别为78.0%(39/50)和22.0%(11/50),而在癌旁组织中高表达和低表达率分别为12.0%(6/50)和为88.0%(44/50),两者差异有统计学意义(χ2=44.00,P<0.05).单因素分析显示OR2W3表达与PC的组织分化程度、临床分期、淋巴结转移密切相关,该3因素分组间的差异均有统计学意义(均P<0.05).结论 OR2W3的高表达可能在PC发生、发展中起重要作用.
