目的:探讨木香烃内酯(costunolide,Cos)对人肝内胆管癌RBE细胞生物学行为的影响及其作用机制。方法:以不同质量浓度(0、2、4、6、8、12、16、20μg/ml)Cos作用RBE细胞,通过CCK-8法、流式细胞术分别检测Cos对细胞增殖能力和周期分布的影...目的:探讨木香烃内酯(costunolide,Cos)对人肝内胆管癌RBE细胞生物学行为的影响及其作用机制。方法:以不同质量浓度(0、2、4、6、8、12、16、20μg/ml)Cos作用RBE细胞,通过CCK-8法、流式细胞术分别检测Cos对细胞增殖能力和周期分布的影响,Annexin V-FITC/PI双染法、Transwell小室实验分别检测Cos对细胞凋亡和迁移侵袭的影响,q RT-PCR检测与侵袭相关因子MMP2、MMP9 m RNA的表达,Western blotting检测PI3K/AKT信号通路相关蛋白的表达。结果:Cos能够显著抑制RBE细胞的增殖活性(P<0.05或P<0.01),阻滞细胞周期于S、G2/M期,同时诱导RBE细胞的凋亡(P<0.01)、且呈质量浓度依赖性,Transwell及q RT-PCR结果显示Cos能够显著抑制RBE细胞的侵袭能力、降低侵袭相关转录因子MMP2和MMP9 m RNA的表达,Western blotting结果显示Cos明显抑制p-AKT、Bcl-2、MMP2及MMP9的表达,但促进Bax的表达。结论:Cos通过抑制PI3K/AKT信号通路降低胆管癌RBE细胞的增殖、迁移及侵袭能力。展开更多
IMPT plans with various multi-angle beams were planned by the Varian Eclipse treatment planning system for one case of brain cancer. Dose distributions for each plan, along with the associated linear energy transfer d...IMPT plans with various multi-angle beams were planned by the Varian Eclipse treatment planning system for one case of brain cancer. Dose distributions for each plan, along with the associated linear energy transfer distributions, were recomputed using an in-house fast Monte Carlo dose calculator with a FRBE of 1.1 or with a previously published VRBE model. We then compared dosimetric parameters obtained by the VRBE with those obtained by the FRBE. Biological doses obtained by the VRBE for the clinical target volume in all plans were 1% - 2% larger than those obtained by the FRBE. The minimum dose obtained by the VRBE for the right optic nerve in the MFO IMPT with 4 fields was 70% larger than that obtained by the FRBE, but the difference was only 18.1 cGy (RBE). The difference in maximum dose for the right optic nerve in the MFO IMPT with 5 fields was less than 10.4%, but the difference was 131.8 cGy (RBE). The mean difference in maximum dose was less than 2% for all other organs at risk. We found that biological dose with the FRBE had any dose errors in IMPT with various multi-angle beams.展开更多
文摘目的:探讨木香烃内酯(costunolide,Cos)对人肝内胆管癌RBE细胞生物学行为的影响及其作用机制。方法:以不同质量浓度(0、2、4、6、8、12、16、20μg/ml)Cos作用RBE细胞,通过CCK-8法、流式细胞术分别检测Cos对细胞增殖能力和周期分布的影响,Annexin V-FITC/PI双染法、Transwell小室实验分别检测Cos对细胞凋亡和迁移侵袭的影响,q RT-PCR检测与侵袭相关因子MMP2、MMP9 m RNA的表达,Western blotting检测PI3K/AKT信号通路相关蛋白的表达。结果:Cos能够显著抑制RBE细胞的增殖活性(P<0.05或P<0.01),阻滞细胞周期于S、G2/M期,同时诱导RBE细胞的凋亡(P<0.01)、且呈质量浓度依赖性,Transwell及q RT-PCR结果显示Cos能够显著抑制RBE细胞的侵袭能力、降低侵袭相关转录因子MMP2和MMP9 m RNA的表达,Western blotting结果显示Cos明显抑制p-AKT、Bcl-2、MMP2及MMP9的表达,但促进Bax的表达。结论:Cos通过抑制PI3K/AKT信号通路降低胆管癌RBE细胞的增殖、迁移及侵袭能力。
文摘IMPT plans with various multi-angle beams were planned by the Varian Eclipse treatment planning system for one case of brain cancer. Dose distributions for each plan, along with the associated linear energy transfer distributions, were recomputed using an in-house fast Monte Carlo dose calculator with a FRBE of 1.1 or with a previously published VRBE model. We then compared dosimetric parameters obtained by the VRBE with those obtained by the FRBE. Biological doses obtained by the VRBE for the clinical target volume in all plans were 1% - 2% larger than those obtained by the FRBE. The minimum dose obtained by the VRBE for the right optic nerve in the MFO IMPT with 4 fields was 70% larger than that obtained by the FRBE, but the difference was only 18.1 cGy (RBE). The difference in maximum dose for the right optic nerve in the MFO IMPT with 5 fields was less than 10.4%, but the difference was 131.8 cGy (RBE). The mean difference in maximum dose was less than 2% for all other organs at risk. We found that biological dose with the FRBE had any dose errors in IMPT with various multi-angle beams.
