背景与目的:维甲酸/干扰素联合应用诱导细胞凋亡相关的基因(gene associated with retinoid-interferon-induced mortality-19,GRIM-19)是死亡相关基因中的一员,它的过高表达可以抑制肿瘤细胞的增殖,促进细胞的凋亡。本研究检测非小细...背景与目的:维甲酸/干扰素联合应用诱导细胞凋亡相关的基因(gene associated with retinoid-interferon-induced mortality-19,GRIM-19)是死亡相关基因中的一员,它的过高表达可以抑制肿瘤细胞的增殖,促进细胞的凋亡。本研究检测非小细胞肺癌和正常肺组织中GRIM-19蛋白的表达和定位,探讨其在非小细胞肺癌组织中表达的临床意义。方法:应用免疫组化ABC法检测49例非小细胞肺癌组织及相应癌旁正常组织中GRIM-19蛋白的表达情况,并用光密度(A)值定量描述其表达水平;同时用激光共聚焦扫描技术检测GRIM-19蛋白在细胞内的定位。结果:正常肺组织中GRIM-19主要定位于细胞浆中;而肿瘤组织主要位于细胞核中。激光共聚焦扫描技术检测验证了这种结果。GRIM-19蛋白在正常肺组织中阳性率为93.8%(46/49),而在非小细胞肺癌中阳性率为55.1%(27/49),两者之间的差异有统计学意义(P<0.01)。肿瘤组织中GRIM-19蛋白的平均表达水平(A值为0.22±0.01)比正常组织(A值为0.29±0.02)下降24.3%(P<0.01)。GRIM-19蛋白阳性率在Ⅰ、Ⅱ、Ⅲ+Ⅳ期非小细胞肺癌组织中分别是78.6%、48.1%、12.5%,其差异有统计学意义(rs=-0.428,P<0.05)。结论:肺癌组织中GRIM-19蛋白表达随肿瘤恶性程度升高而显著下降甚至缺失,分布由胞浆转入细胞核;GRIM-19蛋白表达可能与肺癌的发生发展相关。展开更多
OBJECTIVE The objective of this study was to explore the effect of CDA-2, a selective inhibitor of abnormal methylation enzymes in cancer cells, on the therapeutic efficacy of cytotoxic chemotherapy. METHODS Advanced ...OBJECTIVE The objective of this study was to explore the effect of CDA-2, a selective inhibitor of abnormal methylation enzymes in cancer cells, on the therapeutic efficacy of cytotoxic chemotherapy. METHODS Advanced cancer patients, all of whom had previously undergone chemotherapy, were randomly divided into 2 groups, one receiving chemotherapy only as the control group, and the other receiving CDA-2 in addition to chemotherapy as the combination group. The therapeutic efficacies and the toxic maniestations of the 2 groups were compared based on the WHO criteria. RESULTS Of 454 cancer patients enrolled in phase Ⅲ clinical trials of CDA-2, 80, 188, and 186 were breast cancer, NSCLC, and primary hepatoma patients, respectively. Among them 378 patients completed treatments according to the protocols. The results showed that the overall effective rate of the combination group was 2.6 fold that of the control group, 4.8 fold in the case of breast cancer, 2.3 fold in the case of primary hepatoma, and 2.2 fold in the case of NSCLC. Surprisingly, the combination therapy appeared to work better for stage Ⅳ than stage Ⅲ patients. CDA-2 did not contribute additional toxicity. On the contrary, it reduced toxic manifestations of chemotherapy, particularly regarding white blood cells, nausea and vomiting. CONCLUSION Modulation of abnormal methylation enzymes by CDA-2 is definitely helpful to supplement chemotherapy. It significantly increased the therapeutic efficacy and reduced the toxic manifestation of cytotoxic chemotherapy on breast cancer and NSCLC.展开更多
Objective: To study the expression of extracellular matrix (ECM) proteins including Collagen Ⅳ (Co Ⅳ), Fibronectin, Laminin in human non-small cell lung cancer (NSCLC) specimens and the relationship between E...Objective: To study the expression of extracellular matrix (ECM) proteins including Collagen Ⅳ (Co Ⅳ), Fibronectin, Laminin in human non-small cell lung cancer (NSCLC) specimens and the relationship between ECM and cell adhesion, proliferation, apoptosis and drug sensitivity in NSCLC cell line. And to investigate the role of phosphatidylinositol 3-kinase (PI3-K) in signal transduction of Co Ⅳ in NSCLC. Methods: The expression of ECM proteins was detected by using immunohistochemical staining (Envision's). Adherent cells were stained with 1% methylene blue. Cell proliferation and cytotoxic effects were monitored by MTT assay. Cell apoptosis was analyzed by FITC-Annexin V/PI double staining variables flow cytometry (FCM). Results: The expression rate of Co Ⅳ (93%) was the highest compared to others in NSCLC stroma. After treated with Co Ⅳ, the adhesion of H1299 cells was increased and the cytotoxicity of cis-platinum (DDP) against H1299 cells was decreased compared to the control (P〈0.05). After treated with Co Ⅳ both survival and proliferation rates were higher and apoptosis rate was lower than without Co Ⅳ (P〈0.05). PI3-K inhibitor LY294002 decreased both survival and proliferation rates (82.7%±2.0% and 75.2%±6.8%, respectively), even on Co Ⅳ-coated surface (92.2%±2.8% and 84.6%±9.2%, respectively). And it also helped DDP increase apoptosis. Conclusion: ECM remodeling existed in NSCLC. Co Ⅳ protected NSCLC cells from DDP-induced apoptosis and weakened the cytotoxicity of DDP. PI3-K pathway might be the crucial mechanism of apoptosis impairment and drug resistance.展开更多
文摘背景与目的:维甲酸/干扰素联合应用诱导细胞凋亡相关的基因(gene associated with retinoid-interferon-induced mortality-19,GRIM-19)是死亡相关基因中的一员,它的过高表达可以抑制肿瘤细胞的增殖,促进细胞的凋亡。本研究检测非小细胞肺癌和正常肺组织中GRIM-19蛋白的表达和定位,探讨其在非小细胞肺癌组织中表达的临床意义。方法:应用免疫组化ABC法检测49例非小细胞肺癌组织及相应癌旁正常组织中GRIM-19蛋白的表达情况,并用光密度(A)值定量描述其表达水平;同时用激光共聚焦扫描技术检测GRIM-19蛋白在细胞内的定位。结果:正常肺组织中GRIM-19主要定位于细胞浆中;而肿瘤组织主要位于细胞核中。激光共聚焦扫描技术检测验证了这种结果。GRIM-19蛋白在正常肺组织中阳性率为93.8%(46/49),而在非小细胞肺癌中阳性率为55.1%(27/49),两者之间的差异有统计学意义(P<0.01)。肿瘤组织中GRIM-19蛋白的平均表达水平(A值为0.22±0.01)比正常组织(A值为0.29±0.02)下降24.3%(P<0.01)。GRIM-19蛋白阳性率在Ⅰ、Ⅱ、Ⅲ+Ⅳ期非小细胞肺癌组织中分别是78.6%、48.1%、12.5%,其差异有统计学意义(rs=-0.428,P<0.05)。结论:肺癌组织中GRIM-19蛋白表达随肿瘤恶性程度升高而显著下降甚至缺失,分布由胞浆转入细胞核;GRIM-19蛋白表达可能与肺癌的发生发展相关。
文摘OBJECTIVE The objective of this study was to explore the effect of CDA-2, a selective inhibitor of abnormal methylation enzymes in cancer cells, on the therapeutic efficacy of cytotoxic chemotherapy. METHODS Advanced cancer patients, all of whom had previously undergone chemotherapy, were randomly divided into 2 groups, one receiving chemotherapy only as the control group, and the other receiving CDA-2 in addition to chemotherapy as the combination group. The therapeutic efficacies and the toxic maniestations of the 2 groups were compared based on the WHO criteria. RESULTS Of 454 cancer patients enrolled in phase Ⅲ clinical trials of CDA-2, 80, 188, and 186 were breast cancer, NSCLC, and primary hepatoma patients, respectively. Among them 378 patients completed treatments according to the protocols. The results showed that the overall effective rate of the combination group was 2.6 fold that of the control group, 4.8 fold in the case of breast cancer, 2.3 fold in the case of primary hepatoma, and 2.2 fold in the case of NSCLC. Surprisingly, the combination therapy appeared to work better for stage Ⅳ than stage Ⅲ patients. CDA-2 did not contribute additional toxicity. On the contrary, it reduced toxic manifestations of chemotherapy, particularly regarding white blood cells, nausea and vomiting. CONCLUSION Modulation of abnormal methylation enzymes by CDA-2 is definitely helpful to supplement chemotherapy. It significantly increased the therapeutic efficacy and reduced the toxic manifestation of cytotoxic chemotherapy on breast cancer and NSCLC.
基金This project was supported by the Science Foundation of Shanghai Municipal Commission of Science and Technology (034119953).
文摘Objective: To study the expression of extracellular matrix (ECM) proteins including Collagen Ⅳ (Co Ⅳ), Fibronectin, Laminin in human non-small cell lung cancer (NSCLC) specimens and the relationship between ECM and cell adhesion, proliferation, apoptosis and drug sensitivity in NSCLC cell line. And to investigate the role of phosphatidylinositol 3-kinase (PI3-K) in signal transduction of Co Ⅳ in NSCLC. Methods: The expression of ECM proteins was detected by using immunohistochemical staining (Envision's). Adherent cells were stained with 1% methylene blue. Cell proliferation and cytotoxic effects were monitored by MTT assay. Cell apoptosis was analyzed by FITC-Annexin V/PI double staining variables flow cytometry (FCM). Results: The expression rate of Co Ⅳ (93%) was the highest compared to others in NSCLC stroma. After treated with Co Ⅳ, the adhesion of H1299 cells was increased and the cytotoxicity of cis-platinum (DDP) against H1299 cells was decreased compared to the control (P〈0.05). After treated with Co Ⅳ both survival and proliferation rates were higher and apoptosis rate was lower than without Co Ⅳ (P〈0.05). PI3-K inhibitor LY294002 decreased both survival and proliferation rates (82.7%±2.0% and 75.2%±6.8%, respectively), even on Co Ⅳ-coated surface (92.2%±2.8% and 84.6%±9.2%, respectively). And it also helped DDP increase apoptosis. Conclusion: ECM remodeling existed in NSCLC. Co Ⅳ protected NSCLC cells from DDP-induced apoptosis and weakened the cytotoxicity of DDP. PI3-K pathway might be the crucial mechanism of apoptosis impairment and drug resistance.