Objective：To investigate the potential efficacy of panaxadiol saponins component（PDS-C）,a biologically active fraction isolated from total ginsenosides,to reverse chemotherapy-induced myelosuppression and pancytope...Objective：To investigate the potential efficacy of panaxadiol saponins component（PDS-C）,a biologically active fraction isolated from total ginsenosides,to reverse chemotherapy-induced myelosuppression and pancytopenia caused by cyclophamide（CTX）.Methods：Mice with myelosuppression induced by CTX were treated with PDS-C at a low-（20 mg/kg）,moderate-（40 mg/kg）,or high-dose（80 mg/kg） for 7 consecutive days.The level of peripheral white blood cell（WBC）,neutrophil（NEU） and platelet（PLT） were measured,the histopathology and colony formation were observed,the protein kinase and transcription factors in hematopoietic cells were determined by immunohistochemical staining and Western blot.Results：In response to PDS-C therapy,the peripheral WBC,NEU and PLT counts of CTX-induced myelosuppressed mice were significantly increased in a dose-dependent manner.Similarly,bone marrow histopathology examination showed reversal of CTX-induced myelosuppression with increase in overall bone marrow cellularity and the number of hematopoietic cells（P〈0.01）.PDS-C also promoted proliferation of granulocytic and megakaryocyte progenitor cells in CTX-treated mice,as evidenced by significantly increase in colony formation units-granulocytes/monocytes and-megakaryocytes（P〈0.01）.The enhancement of hematopoiesis by PDS-C appears to be mediated by an intracellular signaling pathway,this was evidenced by the up-regulation of phosphorylated mitogen-activated protein kinase（p-MEK） and extracellular signal-regulated kinases（p-ERK）,and receptor tyrosine kinase（C-kit） and globin transcription factor 1（GATA-1） in hematopoietic cells of CTX-treated mice（P〈0.05）.Conclusions：PDS-C possesses hematopoietic growth factor-like activities that promote proliferation and also possibly differentiation of hematopoietic progenitor cells in myelosuppressed mice,probably mediated by a mechanism involving MEK and ERK protein kinases,and C-kit and GATA-1 transcription factors.PDS-C may potentially b展开更多
目的研究益气消癥法对雌激素诱导子宫肌瘤模型豚鼠子宫组织细胞外信号调节激酶2(extracellular signal regulated kinase 2,MEK2)、磷酸化激活丝裂原激活蛋白激酶的激酶(phosphorylation extracellular signal regulated kinase,p-ERK)...目的研究益气消癥法对雌激素诱导子宫肌瘤模型豚鼠子宫组织细胞外信号调节激酶2(extracellular signal regulated kinase 2,MEK2)、磷酸化激活丝裂原激活蛋白激酶的激酶(phosphorylation extracellular signal regulated kinase,p-ERK)蛋白表达的影响。方法将去势豚鼠随机分为正常组、模型组、中药高剂量组、中药中剂量组、中药低剂量组及西药组,并以正常组作对照。通过去势加皮下注射雌二醇(estradiol,E2)建立子宫肌瘤模型,通过免疫组化法检测6组子宫组织MEK2、p-ERK蛋白表达。结果模型组豚鼠子宫肌组织MEK2、p-ERK蛋白表达显著高于正常组(P<0.01),中药高、中、低剂量组均有不同程度的降低,其中中药高剂量组豚鼠子宫组织MEK2、p-ERK蛋白表达显著低于模型组及西药组(P<0.01)。结论益气消癥法可能是通过干预MAPK/ERK细胞反应信号通路抑制肌瘤细胞增殖,从而达到治疗子宫肌瘤的目的。展开更多
有丝分裂原活化蛋白激酶激酶激酶(mitogen-activated protein kinase/extracellular signal-regulated kinase kinase kinase 3,MEKK3)是MAP3K(mitogen-activated protein kinase kinase kinase)家族的丝氨酸/苏氨酸蛋白激酶,它在哺乳...有丝分裂原活化蛋白激酶激酶激酶(mitogen-activated protein kinase/extracellular signal-regulated kinase kinase kinase 3,MEKK3)是MAP3K(mitogen-activated protein kinase kinase kinase)家族的丝氨酸/苏氨酸蛋白激酶,它在哺乳类动物的各种组织中广泛表达。该蛋白激酶能够有效激活有丝分裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)和NF-κB信号通路,与多种肿瘤的发生与发展密切相关。本文将从其结构、蛋白磷酸化、信号传导、免疫调节及与肿瘤的关系等方面对MEKK3的研究进行相关综述。展开更多
基金Supported by the Science and Technology Program Project of Zhejiang Province(No.2015C33173)Chinese Medicine Foundation of Young Talents in Zhejiang Province(No.2014ZQ006)Australia-China Institutional Links Research Program sponsored by the International Development Program of Education Australia(No.IDP 2-8)
文摘Objective：To investigate the potential efficacy of panaxadiol saponins component（PDS-C）,a biologically active fraction isolated from total ginsenosides,to reverse chemotherapy-induced myelosuppression and pancytopenia caused by cyclophamide（CTX）.Methods：Mice with myelosuppression induced by CTX were treated with PDS-C at a low-（20 mg/kg）,moderate-（40 mg/kg）,or high-dose（80 mg/kg） for 7 consecutive days.The level of peripheral white blood cell（WBC）,neutrophil（NEU） and platelet（PLT） were measured,the histopathology and colony formation were observed,the protein kinase and transcription factors in hematopoietic cells were determined by immunohistochemical staining and Western blot.Results：In response to PDS-C therapy,the peripheral WBC,NEU and PLT counts of CTX-induced myelosuppressed mice were significantly increased in a dose-dependent manner.Similarly,bone marrow histopathology examination showed reversal of CTX-induced myelosuppression with increase in overall bone marrow cellularity and the number of hematopoietic cells（P〈0.01）.PDS-C also promoted proliferation of granulocytic and megakaryocyte progenitor cells in CTX-treated mice,as evidenced by significantly increase in colony formation units-granulocytes/monocytes and-megakaryocytes（P〈0.01）.The enhancement of hematopoiesis by PDS-C appears to be mediated by an intracellular signaling pathway,this was evidenced by the up-regulation of phosphorylated mitogen-activated protein kinase（p-MEK） and extracellular signal-regulated kinases（p-ERK）,and receptor tyrosine kinase（C-kit） and globin transcription factor 1（GATA-1） in hematopoietic cells of CTX-treated mice（P〈0.05）.Conclusions：PDS-C possesses hematopoietic growth factor-like activities that promote proliferation and also possibly differentiation of hematopoietic progenitor cells in myelosuppressed mice,probably mediated by a mechanism involving MEK and ERK protein kinases,and C-kit and GATA-1 transcription factors.PDS-C may potentially b
文摘目的研究益气消癥法对雌激素诱导子宫肌瘤模型豚鼠子宫组织细胞外信号调节激酶2(extracellular signal regulated kinase 2,MEK2)、磷酸化激活丝裂原激活蛋白激酶的激酶(phosphorylation extracellular signal regulated kinase,p-ERK)蛋白表达的影响。方法将去势豚鼠随机分为正常组、模型组、中药高剂量组、中药中剂量组、中药低剂量组及西药组,并以正常组作对照。通过去势加皮下注射雌二醇(estradiol,E2)建立子宫肌瘤模型,通过免疫组化法检测6组子宫组织MEK2、p-ERK蛋白表达。结果模型组豚鼠子宫肌组织MEK2、p-ERK蛋白表达显著高于正常组(P<0.01),中药高、中、低剂量组均有不同程度的降低,其中中药高剂量组豚鼠子宫组织MEK2、p-ERK蛋白表达显著低于模型组及西药组(P<0.01)。结论益气消癥法可能是通过干预MAPK/ERK细胞反应信号通路抑制肌瘤细胞增殖,从而达到治疗子宫肌瘤的目的。
文摘有丝分裂原活化蛋白激酶激酶激酶(mitogen-activated protein kinase/extracellular signal-regulated kinase kinase kinase 3,MEKK3)是MAP3K(mitogen-activated protein kinase kinase kinase)家族的丝氨酸/苏氨酸蛋白激酶,它在哺乳类动物的各种组织中广泛表达。该蛋白激酶能够有效激活有丝分裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)和NF-κB信号通路,与多种肿瘤的发生与发展密切相关。本文将从其结构、蛋白磷酸化、信号传导、免疫调节及与肿瘤的关系等方面对MEKK3的研究进行相关综述。
