OBJECTIVE:To investigate if the Liuwei Dihuang pill(LWDHP)can inhibit metastasis to the liver and lungs in mice bearing triple-negative breast cancer(TNBC),and the molecular mechanism underpinning this action.METHODS:...OBJECTIVE:To investigate if the Liuwei Dihuang pill(LWDHP)can inhibit metastasis to the liver and lungs in mice bearing triple-negative breast cancer(TNBC),and the molecular mechanism underpinning this action.METHODS:Ninety-nine TNBC bearing-mice were distributed randomly to five groups:control(Con),paclitaxel(PTX),low-dose LWDHP(LLP,2.3 g·kg^-1·d^-1),middle-dose LWDHP(MLP,4.6 g·kg^-1·d^-1)and high-dose LWDHP(HLP,9.2 g·kg^-1·d^-1).The LWDHP were administered(p.o.)to the agonal stage.The morphology of BC cells was observed by hematoxylin&eosin staining.Expression of axin-2,β-catenin,T cell factor(TCF),cyclin-D1 and vascular endothelial growth factor(VEGF)was detected by western blotting or immunofluorescence.β-catenin/TCF-1 interaction was measured using a co-immunoprecipitation assay.RESULTS:After LWDHP treatment,metastasis of BC cells to the lungs and liver was inhibited,expression of axin-2 was increased,expression of TCF-1,β-catenin,cyclin-D1 and VEGF was decreased,andβ-catenin/TCF-1 interaction was disrupted.CONCLUSION:The LWDHP could inhibit metastasis of BC cells to the liver and lungs.The molecular mechanism underlying this action may be regulation of protein expression andβ-catenin/TCF-1 interactions in the Wnt pathway.展开更多
NORE1A (RASSF5) is a tumor suppressor of the RASSF family that is often down-regulated in human tumors. NORE1A has multiple roles in controlling cellular homeostasis, one of them being regulating levels of β-catenin ...NORE1A (RASSF5) is a tumor suppressor of the RASSF family that is often down-regulated in human tumors. NORE1A has multiple roles in controlling cellular homeostasis, one of them being regulating levels of β-catenin by binding and modulating the ubiquitin ligase substrate recognition factor β-TrCP. β-catenin is a major executor of the Wnt pathway. The ubiquitin SCF-β-TrCP ligase complex acts on a phospho-degron site in β-catenin that can be phosphorylated by GSK-3β. We now show that in addition to binding β-TrCP, NORE1A also promotes the phosphorylation of the β-catenin phospho-degron by complexing with the kinase GSK-3β. Indeed, NORE1A enhances the formation of a GSK-3β/β-TrCP complex. A structural mutant of NORE1A that retains β-TrCP binding but will no longer interact with GSK-3β inhibits the β-catenin degrading action of NORE1A. The GSK-3β interaction with NORE1A plays an important role in the biology of NORE1A as a GSK-3β inhibitor blocks NORE1A induced senescence. Thus, we identify a new role for the tumor suppressor NORE1A: The regulation of GSK-3β. GSK-3β has many other substrates including multiple transcription factors and co-activators such as p53 and the Hippo component TAZ. The work implies that NORE1A may be able to influence all of them via this new kinase scaffolding interaction.展开更多
目的:观察五福饮对大鼠尾部退变椎间盘的影响及其作用机制。方法:将48只12周龄健康雄性清洁级SD大鼠随机分成空白对照组、模型组、五福饮组,每组16只。针刺模型组、五福饮组大鼠尾部椎间盘并向椎间盘内注入肿瘤坏死因子-α,空白对照组...目的:观察五福饮对大鼠尾部退变椎间盘的影响及其作用机制。方法:将48只12周龄健康雄性清洁级SD大鼠随机分成空白对照组、模型组、五福饮组,每组16只。针刺模型组、五福饮组大鼠尾部椎间盘并向椎间盘内注入肿瘤坏死因子-α,空白对照组大鼠不做任何处理。造模成功后(造模开始后4周)五福饮组以20 m L·kg^(-1)剂量的五福饮灌胃,空白对照组和模型组给予等量生理盐水灌胃,每日1次,连续灌胃8周。分别于造模成功后及药物干预8周后从各组随机抽取8只大鼠,采用麻醉过量法处死后,完整取下Co_(5~6)椎间盘及其相邻两侧椎体,行Micro-CT扫描测量椎间相对高度,采取HE染色观察椎间盘组织形态,采用逆转录-聚合酶链式反应法检测椎间盘β-连环蛋白(β-catenin)和含Ⅰ型血小板结合蛋白基序的解聚蛋白样金属蛋白酶(a disintesrin and metalloprotease with thrombospondin typeⅠmotifs,ADAMTS)-5基因的表达。结果:(1)椎间隙相对高度。造模成功后,3组大鼠Co_5~Co_6椎间隙相对高度比较,差异有统计学意义[100%,(56.37±11.32)%,(55.63±12.76)%,F=22.148,P=0.000];空白对照组Co_5~Co_6椎间隙相对高度高于模型组和五福饮组(P=0.000,P=0.000);模型组Co_5~Co_6椎间隙相对高度与五福饮组比较,差异无统计学意义(P=0.203)。药物干预8周后,3组大鼠Co_5~Co_6椎间隙相对高度比较,差异有统计学意义[100%,(50.35±10.72)%,(80.84±9.43)%,F=31.492,P=0.000];空白对照组Co_5~Co_6椎间隙相对高度高于模型组和五福饮组(P=0.000,P=0.000),模型组Co_5~Co_6椎间隙相对高度低于五福饮组(P=0.001)。(2)椎间盘组织形态。造模成功后,模型组和五福饮组大鼠Co_(5~6)椎间盘均明显退变,表现为髓核细胞数量减少,纤维环排列紊乱且出现裂隙,纤维环与髓核交界区变窄。药物干预8周后,模型组大鼠Co_(5~6)椎间盘退变更明显,而五福饮组大鼠Co_(5~6)椎间盘退变情况明显改善,可见较�展开更多
基金Supported by the Chinese National Natural Science Foundation(No.81160531)Jiangxi Natural Science Foundation(No.20161BAB205223,20192ACBL21032)Scientific Research Fund of Jiangxi Provincial Education Department(No.GJJ180648)
文摘OBJECTIVE:To investigate if the Liuwei Dihuang pill(LWDHP)can inhibit metastasis to the liver and lungs in mice bearing triple-negative breast cancer(TNBC),and the molecular mechanism underpinning this action.METHODS:Ninety-nine TNBC bearing-mice were distributed randomly to five groups:control(Con),paclitaxel(PTX),low-dose LWDHP(LLP,2.3 g·kg^-1·d^-1),middle-dose LWDHP(MLP,4.6 g·kg^-1·d^-1)and high-dose LWDHP(HLP,9.2 g·kg^-1·d^-1).The LWDHP were administered(p.o.)to the agonal stage.The morphology of BC cells was observed by hematoxylin&eosin staining.Expression of axin-2,β-catenin,T cell factor(TCF),cyclin-D1 and vascular endothelial growth factor(VEGF)was detected by western blotting or immunofluorescence.β-catenin/TCF-1 interaction was measured using a co-immunoprecipitation assay.RESULTS:After LWDHP treatment,metastasis of BC cells to the lungs and liver was inhibited,expression of axin-2 was increased,expression of TCF-1,β-catenin,cyclin-D1 and VEGF was decreased,andβ-catenin/TCF-1 interaction was disrupted.CONCLUSION:The LWDHP could inhibit metastasis of BC cells to the liver and lungs.The molecular mechanism underlying this action may be regulation of protein expression andβ-catenin/TCF-1 interactions in the Wnt pathway.
文摘NORE1A (RASSF5) is a tumor suppressor of the RASSF family that is often down-regulated in human tumors. NORE1A has multiple roles in controlling cellular homeostasis, one of them being regulating levels of β-catenin by binding and modulating the ubiquitin ligase substrate recognition factor β-TrCP. β-catenin is a major executor of the Wnt pathway. The ubiquitin SCF-β-TrCP ligase complex acts on a phospho-degron site in β-catenin that can be phosphorylated by GSK-3β. We now show that in addition to binding β-TrCP, NORE1A also promotes the phosphorylation of the β-catenin phospho-degron by complexing with the kinase GSK-3β. Indeed, NORE1A enhances the formation of a GSK-3β/β-TrCP complex. A structural mutant of NORE1A that retains β-TrCP binding but will no longer interact with GSK-3β inhibits the β-catenin degrading action of NORE1A. The GSK-3β interaction with NORE1A plays an important role in the biology of NORE1A as a GSK-3β inhibitor blocks NORE1A induced senescence. Thus, we identify a new role for the tumor suppressor NORE1A: The regulation of GSK-3β. GSK-3β has many other substrates including multiple transcription factors and co-activators such as p53 and the Hippo component TAZ. The work implies that NORE1A may be able to influence all of them via this new kinase scaffolding interaction.
文摘目的:观察五福饮对大鼠尾部退变椎间盘的影响及其作用机制。方法:将48只12周龄健康雄性清洁级SD大鼠随机分成空白对照组、模型组、五福饮组,每组16只。针刺模型组、五福饮组大鼠尾部椎间盘并向椎间盘内注入肿瘤坏死因子-α,空白对照组大鼠不做任何处理。造模成功后(造模开始后4周)五福饮组以20 m L·kg^(-1)剂量的五福饮灌胃,空白对照组和模型组给予等量生理盐水灌胃,每日1次,连续灌胃8周。分别于造模成功后及药物干预8周后从各组随机抽取8只大鼠,采用麻醉过量法处死后,完整取下Co_(5~6)椎间盘及其相邻两侧椎体,行Micro-CT扫描测量椎间相对高度,采取HE染色观察椎间盘组织形态,采用逆转录-聚合酶链式反应法检测椎间盘β-连环蛋白(β-catenin)和含Ⅰ型血小板结合蛋白基序的解聚蛋白样金属蛋白酶(a disintesrin and metalloprotease with thrombospondin typeⅠmotifs,ADAMTS)-5基因的表达。结果:(1)椎间隙相对高度。造模成功后,3组大鼠Co_5~Co_6椎间隙相对高度比较,差异有统计学意义[100%,(56.37±11.32)%,(55.63±12.76)%,F=22.148,P=0.000];空白对照组Co_5~Co_6椎间隙相对高度高于模型组和五福饮组(P=0.000,P=0.000);模型组Co_5~Co_6椎间隙相对高度与五福饮组比较,差异无统计学意义(P=0.203)。药物干预8周后,3组大鼠Co_5~Co_6椎间隙相对高度比较,差异有统计学意义[100%,(50.35±10.72)%,(80.84±9.43)%,F=31.492,P=0.000];空白对照组Co_5~Co_6椎间隙相对高度高于模型组和五福饮组(P=0.000,P=0.000),模型组Co_5~Co_6椎间隙相对高度低于五福饮组(P=0.001)。(2)椎间盘组织形态。造模成功后,模型组和五福饮组大鼠Co_(5~6)椎间盘均明显退变,表现为髓核细胞数量减少,纤维环排列紊乱且出现裂隙,纤维环与髓核交界区变窄。药物干预8周后,模型组大鼠Co_(5~6)椎间盘退变更明显,而五福饮组大鼠Co_(5~6)椎间盘退变情况明显改善,可见较�
