ABSTRACT
@#[摘 要] 目的：评估细胞分裂周期蛋白20（CDC20）在子宫内膜癌（EC）中的表达，探讨其对EC细胞RL95-2周期和凋亡的影响及可能的机制。方法：从癌症基因组图谱（TCGA）数据库获取EC的mRNA表达矩阵以及患者的临床信息，通过R语言分析CDC20 mRNA的差异表达情况及其与肿瘤分期的相关性，qPCR及WB法检测CDC20在RL95-2细胞中的表达；向RL95-2细胞转染sh-CDC20以敲减CDC20的表达，采用CCK-8法和流式细胞术检测敲减CDC20对RL95-2细胞增殖活力、细胞周期分布和凋亡的影响，WB法分析对Mcl-1/p-Chk1信号活性的影响；建立RL95-2细胞裸鼠移植瘤模型，评估敲减CDC20对肿瘤生长的抑制作用及对移植瘤组织中Mcl-1/p-Chk1信号轴和细胞凋亡的影响。结果：CDC20在EC组织及RL95-2细胞中呈高表达（均P<0.01），且CDC20的高表达与EC的分期有关联。敲减CDC20可显著降低RL95-2细胞增殖活力（P<0.01），阻滞细胞周期于G1期（P<0.01），促进细胞凋亡（P<0.01），抑制细胞中Mcl-1和p-Chk1的表达（P<0.05或P<0.01）。敲减CDC20可显著抑制RL95-2细胞裸鼠移植瘤的生长（P<0.01），降低移植瘤组织内Mcl-1和p-Chk1的表达（P<0.01），促进移植瘤细胞凋亡（P<0.01）。结论：CDC20在EC组织中呈高表达且与肿瘤分期有关联，敲减CDC20能够抑制RL95-2细胞及其裸鼠移植瘤的生长而促进凋亡，这可能与Mcl-1/p-Chk1信号轴有关。
ABSTRACT
Objective: To provide an objective cost–utility evaluation of a colorectal cancer screening program in a hypothetical general population. Materials and Methods: A cost–utility analysis was conducted comparing screened individuals with the general population. Patients were evaluated as part of the screening program which conducted colorectal cancer risk assessments and performed colonoscopies from October 2012 to May 2013. Data were compared to a hypothetical group of the same size, consisting of the general population in which no cancer screening had been conducted. The cost and utility data have been published previously. Results: The average cost per quality-adjusted life year (QALY) of colorectal cancer screening population was 84,092 CNY, while the average cost per QALY of the general population was 122,530 CNY. The colorectal cancer screening program saved 43,530 CNY per additional QALY. Conclusion: The colorectal cancer screening program could improve health-related quality of life and reduce medical expenditure