Intracellular communications between breast cancer and fibroblast cells were reported to be involved in cancer proliferation,growth,and therapy resitance.The hallmarks of cancer fibroblast interactions,consisting of c...Intracellular communications between breast cancer and fibroblast cells were reported to be involved in cancer proliferation,growth,and therapy resitance.The hallmarks of cancer fibroblast interactions,consisting of caveolin 1(Cav1)and mono-carboxylate ransporter 4(MCT4)(metabolic coupling markers),along with IL-6,TGFB,and lactate secretion,are considered robust biomarkers predicting recurrence and metastasis.In order to promote a novel phenotype in normal fibroblasts,we predicted that breast cancer cells could be able to cause loss of Cavl and increase of MCT4,as well as elevate IL 6 and TGF in nearby nomal fibroblasts.We created a co culture model using breast cancer(4T1)and normal fibroblast(NIH3T3)cell lines cultured under specific experimental conditions in order to directly test our theory.Moreover,we show that long-term co-culture of breast cancer cells and normal fibroblasts promotes loss of Cavl and gain of MCT4 in adjacent fibroblasts and increase lactate secretion.These results were validated using the monoculture of each group separately as a control.In this system,we show that me tformin inhibits IL-6 and TGFB secretion and re expresses Cavl in both cells.However,MCT4 and lactate stayed high after treatment with metformin.In conclusion,our work shows that co-culture with breast cancer cells may cause signifcant alterations in the phenotype and secretion of normal fibroblasts.Metformin,however,may change this state and affect fibroblasts'acquired phenotypes.Moreover,mitochondrial inhibition by metformin after 8 days of treatment,signi ficantly hinders tumor growth in mouse model of breast cancer.展开更多
目的:探讨水凝胶递送碱性成纤维细胞生长因子(bFGF)对氧糖剥夺(OGD)后小鼠成纤维NIH3T3细胞功能的影响,并阐明负载bFGF的水凝胶对OGD条件下成纤维细胞氧化应激反应的改善作用。方法:制备bFGF明胶水凝胶,将对数生长期NIH3T3细胞分为空白...目的:探讨水凝胶递送碱性成纤维细胞生长因子(bFGF)对氧糖剥夺(OGD)后小鼠成纤维NIH3T3细胞功能的影响,并阐明负载bFGF的水凝胶对OGD条件下成纤维细胞氧化应激反应的改善作用。方法:制备bFGF明胶水凝胶,将对数生长期NIH3T3细胞分为空白组、20%明胶组和20%明胶+戊二醛组,采用CCK-8法检测6、12和24 h水凝胶浸出液共培养的NIH3T3细胞活性。将NIH3T3细胞分为对照组、OGD组和OGD+不同质量bFGF负载组(OGD+1 ng bFGF组、OGD+10 ng bFGF组和OGD+100 ng bFGF组)。采用Western blotting法检测各组细胞中α-平滑肌肌动蛋白(α-SMA)、Ⅰ型胶原蛋白和Ⅲ型胶原蛋白表达水平。检测各组细胞中丙二醛(MDA)水平和乳酸脱氢酶(LDH)及超氧化物歧化酶(SOD)活性。采用酶联免疫吸附试验(ELISA)法检测bFGF体外释放率。结果:CCK-8法检测,与空白组比较,不同浸出时间20%明胶组和20%明胶+戊二醛组NIH3T3细胞活性差异无统计学意义(P>0.05)。Western blotting法检测,与对照组比较,OGD组NIH3T3细胞中α-SMA和Ⅰ型胶原蛋白表达水平明显升高(P<0.05或P<0.01);与OGD组比较,OGD+1 ng bFGF组、OGD+10 ng bFGF组和OGD+100 ng bFGF组NIH3T3细胞中α-SMA蛋白表达水平均明显降低(P<0.01),Ⅰ型胶原蛋白表达水平均明显降低(P<0.05或P<0.01),并呈剂量依赖性。与对照组比较,OGD组NIH3T3细胞中MDA水平和LDH活性升高(P<0.05),SOD活性降低(P<0.05)。与OGD组比较,OGD+1 ng bFGF组NIH3T3细胞中MDA水平和LDH活性降低(P<0.05),SOD活性升高(P<0.05)。ELISA法检测,在4 h内约10%bFGF由水凝胶中释放,在12 h内约15%bFGF由水凝胶中释放,在24 h内约21%bFGF由水凝胶中释放。结论:负载bFGF的水凝胶可以调控OGD条件下成纤维细胞的转化,抑制成纤维细胞Ⅰ型胶原蛋白表达,并改善细胞氧化应激反应,且该系统具有一定的持续释药能力。展开更多
基金the National Institute for Medical Research Development(NIMADGrant No.995813).
文摘Intracellular communications between breast cancer and fibroblast cells were reported to be involved in cancer proliferation,growth,and therapy resitance.The hallmarks of cancer fibroblast interactions,consisting of caveolin 1(Cav1)and mono-carboxylate ransporter 4(MCT4)(metabolic coupling markers),along with IL-6,TGFB,and lactate secretion,are considered robust biomarkers predicting recurrence and metastasis.In order to promote a novel phenotype in normal fibroblasts,we predicted that breast cancer cells could be able to cause loss of Cavl and increase of MCT4,as well as elevate IL 6 and TGF in nearby nomal fibroblasts.We created a co culture model using breast cancer(4T1)and normal fibroblast(NIH3T3)cell lines cultured under specific experimental conditions in order to directly test our theory.Moreover,we show that long-term co-culture of breast cancer cells and normal fibroblasts promotes loss of Cavl and gain of MCT4 in adjacent fibroblasts and increase lactate secretion.These results were validated using the monoculture of each group separately as a control.In this system,we show that me tformin inhibits IL-6 and TGFB secretion and re expresses Cavl in both cells.However,MCT4 and lactate stayed high after treatment with metformin.In conclusion,our work shows that co-culture with breast cancer cells may cause signifcant alterations in the phenotype and secretion of normal fibroblasts.Metformin,however,may change this state and affect fibroblasts'acquired phenotypes.Moreover,mitochondrial inhibition by metformin after 8 days of treatment,signi ficantly hinders tumor growth in mouse model of breast cancer.
文摘目的:探讨水凝胶递送碱性成纤维细胞生长因子(bFGF)对氧糖剥夺(OGD)后小鼠成纤维NIH3T3细胞功能的影响,并阐明负载bFGF的水凝胶对OGD条件下成纤维细胞氧化应激反应的改善作用。方法:制备bFGF明胶水凝胶,将对数生长期NIH3T3细胞分为空白组、20%明胶组和20%明胶+戊二醛组,采用CCK-8法检测6、12和24 h水凝胶浸出液共培养的NIH3T3细胞活性。将NIH3T3细胞分为对照组、OGD组和OGD+不同质量bFGF负载组(OGD+1 ng bFGF组、OGD+10 ng bFGF组和OGD+100 ng bFGF组)。采用Western blotting法检测各组细胞中α-平滑肌肌动蛋白(α-SMA)、Ⅰ型胶原蛋白和Ⅲ型胶原蛋白表达水平。检测各组细胞中丙二醛(MDA)水平和乳酸脱氢酶(LDH)及超氧化物歧化酶(SOD)活性。采用酶联免疫吸附试验(ELISA)法检测bFGF体外释放率。结果:CCK-8法检测,与空白组比较,不同浸出时间20%明胶组和20%明胶+戊二醛组NIH3T3细胞活性差异无统计学意义(P>0.05)。Western blotting法检测,与对照组比较,OGD组NIH3T3细胞中α-SMA和Ⅰ型胶原蛋白表达水平明显升高(P<0.05或P<0.01);与OGD组比较,OGD+1 ng bFGF组、OGD+10 ng bFGF组和OGD+100 ng bFGF组NIH3T3细胞中α-SMA蛋白表达水平均明显降低(P<0.01),Ⅰ型胶原蛋白表达水平均明显降低(P<0.05或P<0.01),并呈剂量依赖性。与对照组比较,OGD组NIH3T3细胞中MDA水平和LDH活性升高(P<0.05),SOD活性降低(P<0.05)。与OGD组比较,OGD+1 ng bFGF组NIH3T3细胞中MDA水平和LDH活性降低(P<0.05),SOD活性升高(P<0.05)。ELISA法检测,在4 h内约10%bFGF由水凝胶中释放,在12 h内约15%bFGF由水凝胶中释放,在24 h内约21%bFGF由水凝胶中释放。结论:负载bFGF的水凝胶可以调控OGD条件下成纤维细胞的转化,抑制成纤维细胞Ⅰ型胶原蛋白表达,并改善细胞氧化应激反应,且该系统具有一定的持续释药能力。
