Object: The authors studied the influence of CO2 pneumoperitoneum on intracellular pH and signal transduction arising from cancer cell multiplication in laparoscopic tumor operation. Method: They set up a simulation o...Object: The authors studied the influence of CO2 pneumoperitoneum on intracellular pH and signal transduction arising from cancer cell multiplication in laparoscopic tumor operation. Method: They set up a simulation of pneumoperitoneum under different CO2 pressure, and then measured the variation of intracellular pH (pHi) at different time and the activity of protein kinase C (PKC) and protein phosphatase 2a (PP2a) at the end of the pneumoperitoneum. After 1 week, the concentration of cancer cells in the culture medium was calculated. Result: When the pressure of CO2 pneumoperitoneum was 0, 10, 20, 30 mmHg respectively, the average pHi was 7.273, 7.075, 6.783, 6.693 at the end of the pneumoperitoneum; PKC activity was 159.4, 168.5,178.0, 181.6 nmol/(g.min) and PP2a was 4158.3, 4066.9, 3984.0, 3878.5 nmol/(g.min) respectively. After 1 week, the cancer cells concentration was 2.15×105, 2.03×105, 2.20×105, 2.18×105 L-1. Conclusion: CO2 pneumoperitoneum could promote acidosis in cancer cells, inducing the activation of protein kinase C and deactivation of protein phosphatase 2a, but it could not accelerate the mitosis rate of the cancer cells.展开更多
目的 基于pH信号通路探讨白头翁汤正丁醇提取物(butyl alcohol extract of Baitouweng Decoction,BAEB)对白念珠菌黏附的影响。方法 Spotassay检测酸性条件下pH突变株的活性;XTT法检测酸性条件下pH突变株黏附时的代谢活力;荧光显微镜观...目的 基于pH信号通路探讨白头翁汤正丁醇提取物(butyl alcohol extract of Baitouweng Decoction,BAEB)对白念珠菌黏附的影响。方法 Spotassay检测酸性条件下pH突变株的活性;XTT法检测酸性条件下pH突变株黏附时的代谢活力;荧光显微镜观察酸性条件下pH突变株细胞黏附活力;正辛烷容纳法测定酸性条件下pH突变株疏水性;实时荧光定量PCR(qRT-PCR)检测酸性条件下pH突变株黏附相关基因的表达。结果 512μg/m L BAEB对共培养24、48 h的pH突变株的活性影响不大;phr2/phr2在酸性条件下代谢活性低,512μg/m L BAEB可明显抑制白念珠菌野生株(WT)、PHR2回补菌株、rim101/rim101、RIM101回补菌株的代谢活性,对phr2/phr2代谢活性影响不大;512μg/m L BAEB可明显抑制WT、PHR2回补菌株、rim101/rim101、RIM101回补菌株的细胞黏附活力,phr2/phr2加药前后细胞黏附活性无明显变化;512μg/mL BAEB对WT、phr2/phr2、PHR2回补、rim101/rim101及RIM101回补菌株的细胞表面疏水性影响不明显;q RT-PCR法检测512μg/m L BAEB对pH突变株在酸性条件下黏附相关基因作用不明显,但1 024μg/m L BAEB则对大多数黏附相关基因有明显抑制作用。结论 BAEB在酸性条件下能一定程度抑制白念珠菌的黏附。展开更多
基金Project supported by Research and Development Funds of Second Affiliated Hospital, School of Medicine, Zhejiang University, China
文摘Object: The authors studied the influence of CO2 pneumoperitoneum on intracellular pH and signal transduction arising from cancer cell multiplication in laparoscopic tumor operation. Method: They set up a simulation of pneumoperitoneum under different CO2 pressure, and then measured the variation of intracellular pH (pHi) at different time and the activity of protein kinase C (PKC) and protein phosphatase 2a (PP2a) at the end of the pneumoperitoneum. After 1 week, the concentration of cancer cells in the culture medium was calculated. Result: When the pressure of CO2 pneumoperitoneum was 0, 10, 20, 30 mmHg respectively, the average pHi was 7.273, 7.075, 6.783, 6.693 at the end of the pneumoperitoneum; PKC activity was 159.4, 168.5,178.0, 181.6 nmol/(g.min) and PP2a was 4158.3, 4066.9, 3984.0, 3878.5 nmol/(g.min) respectively. After 1 week, the cancer cells concentration was 2.15×105, 2.03×105, 2.20×105, 2.18×105 L-1. Conclusion: CO2 pneumoperitoneum could promote acidosis in cancer cells, inducing the activation of protein kinase C and deactivation of protein phosphatase 2a, but it could not accelerate the mitosis rate of the cancer cells.
文摘目的 基于pH信号通路探讨白头翁汤正丁醇提取物(butyl alcohol extract of Baitouweng Decoction,BAEB)对白念珠菌黏附的影响。方法 Spotassay检测酸性条件下pH突变株的活性;XTT法检测酸性条件下pH突变株黏附时的代谢活力;荧光显微镜观察酸性条件下pH突变株细胞黏附活力;正辛烷容纳法测定酸性条件下pH突变株疏水性;实时荧光定量PCR(qRT-PCR)检测酸性条件下pH突变株黏附相关基因的表达。结果 512μg/m L BAEB对共培养24、48 h的pH突变株的活性影响不大;phr2/phr2在酸性条件下代谢活性低,512μg/m L BAEB可明显抑制白念珠菌野生株(WT)、PHR2回补菌株、rim101/rim101、RIM101回补菌株的代谢活性,对phr2/phr2代谢活性影响不大;512μg/m L BAEB可明显抑制WT、PHR2回补菌株、rim101/rim101、RIM101回补菌株的细胞黏附活力,phr2/phr2加药前后细胞黏附活性无明显变化;512μg/mL BAEB对WT、phr2/phr2、PHR2回补、rim101/rim101及RIM101回补菌株的细胞表面疏水性影响不明显;q RT-PCR法检测512μg/m L BAEB对pH突变株在酸性条件下黏附相关基因作用不明显,但1 024μg/m L BAEB则对大多数黏附相关基因有明显抑制作用。结论 BAEB在酸性条件下能一定程度抑制白念珠菌的黏附。
