AIM: To investigate the meaning of lymphovascular invasion (LVI) in rectal cancer after neoadjuvant radiotherapy. METHODS: A total of 325 patients who underwent radical resection using total mesorectal excision (TME) ...AIM: To investigate the meaning of lymphovascular invasion (LVI) in rectal cancer after neoadjuvant radiotherapy. METHODS: A total of 325 patients who underwent radical resection using total mesorectal excision (TME) from January 2000 to January 2005 in Beijing cancer hospital were included retrospectively, divided into a preoperative radiotherapy (PRT) group and a control group, according to whether or not they underwent preoperative radiation. Histological assessments of tumor specimens were made and the correlation of LVI and prognosis were evaluated by univariate and multivariate analysis. RESULTS: The occurrence of LVI in the PRT and control groups was 21.4% and 26.1% respectively. In the control group, LVI was signifi cantly associated with histological differentiation and pathologic TNM stage, whereas these associations were not observed in the PRT group. LVI was closely correlated to disease progression and 5-year overall survival (OS) in both groups. Among the patients with disease progression, LVI positive patients in the PRT group had a signifi cantly longer median disease-free period (22.5 mo vs 11.5 mo, P = 0.023) and overall survival time (42.5 mo vs 26.5 mo, P = 0.035) compared to those in the control group, despite the fact that no signifi cant difference in 5-year OS rate was observed (54.4% vs 48.3%, P = 0.137). Multivariate analysis showed the distance of tumor from the anal verge, pretreatment serum carcinoembryonic antigen level, pathologic TNM stage and LVI were the major factors affecting OS. CONCLUSION: Neoadjuvant radiotherapy does not reduce LVI significantly; however, the prognostic meaning of LVI has changed. Patients with LVI may benefi t from neoadjuvant radiotherapy.展开更多
目的:探讨miR-31-5p/张力蛋白1基因(tension protein 1,TNS1)分子轴对乳腺癌细胞生物学行为的影响及其放疗抵抗的分子机制。方法:收集2017年7月至2017年12月南阳市中心医院肿瘤放疗科收治的、经手术切除的21例乳腺癌患者癌及癌旁组织标...目的:探讨miR-31-5p/张力蛋白1基因(tension protein 1,TNS1)分子轴对乳腺癌细胞生物学行为的影响及其放疗抵抗的分子机制。方法:收集2017年7月至2017年12月南阳市中心医院肿瘤放疗科收治的、经手术切除的21例乳腺癌患者癌及癌旁组织标本,以及乳腺癌细胞系MCF-7、MDA-MB-231和SKBR-3,采用qPCR法检测癌组织和癌细胞系中miR-31-5p的表达水平。通过6 MV-X射线照射MCF-7细胞,构建放疗抵抗细胞株MCF-7R。随后,采用克隆形成实验、Transwell小室法和Annexin V/PI染色流式细胞术检测过表达/敲降miR-31-5p对MCF-7和MCF-7R细胞放疗敏感性的影响;用双荧光素酶报告基因验证miR-31-5p与TNS1的靶向关系。结果:乳腺癌组织、细胞系和MCF-7R细胞中miR-31-5p表达水平显著低于癌旁组织、人正常乳腺上皮细胞MCF-10A和MCF-7细胞(均P<0.01)。过表达miR-31-5p显著抑制MCF-7R细胞的侵袭并促进细胞凋亡(均P<0.01),沉默miR-31-5p在MCF-7细胞中结果相反。双荧光素酶报告基因法证实TNS1是miR-31-5p靶基因。过表达miR-31-5p通过靶向下调TNS1显著抑制MCF-7R细胞侵袭能力并促进细胞凋亡(均P<0.01),沉默miR-31-5p通过上调TNS1显著促进MCF-7细胞侵袭和抑制细胞凋亡(均P<0.01),从而上调MCF-7R对放射治疗的敏感性。结论:miR-31-5p/TNS1分子轴与乳腺癌放疗抵抗存在调控关系,且过表达miR-31-5p可逆转MCF-7R细胞对放疗抵抗作用。展开更多
文摘AIM: To investigate the meaning of lymphovascular invasion (LVI) in rectal cancer after neoadjuvant radiotherapy. METHODS: A total of 325 patients who underwent radical resection using total mesorectal excision (TME) from January 2000 to January 2005 in Beijing cancer hospital were included retrospectively, divided into a preoperative radiotherapy (PRT) group and a control group, according to whether or not they underwent preoperative radiation. Histological assessments of tumor specimens were made and the correlation of LVI and prognosis were evaluated by univariate and multivariate analysis. RESULTS: The occurrence of LVI in the PRT and control groups was 21.4% and 26.1% respectively. In the control group, LVI was signifi cantly associated with histological differentiation and pathologic TNM stage, whereas these associations were not observed in the PRT group. LVI was closely correlated to disease progression and 5-year overall survival (OS) in both groups. Among the patients with disease progression, LVI positive patients in the PRT group had a signifi cantly longer median disease-free period (22.5 mo vs 11.5 mo, P = 0.023) and overall survival time (42.5 mo vs 26.5 mo, P = 0.035) compared to those in the control group, despite the fact that no signifi cant difference in 5-year OS rate was observed (54.4% vs 48.3%, P = 0.137). Multivariate analysis showed the distance of tumor from the anal verge, pretreatment serum carcinoembryonic antigen level, pathologic TNM stage and LVI were the major factors affecting OS. CONCLUSION: Neoadjuvant radiotherapy does not reduce LVI significantly; however, the prognostic meaning of LVI has changed. Patients with LVI may benefi t from neoadjuvant radiotherapy.
文摘目的:探讨miR-31-5p/张力蛋白1基因(tension protein 1,TNS1)分子轴对乳腺癌细胞生物学行为的影响及其放疗抵抗的分子机制。方法:收集2017年7月至2017年12月南阳市中心医院肿瘤放疗科收治的、经手术切除的21例乳腺癌患者癌及癌旁组织标本,以及乳腺癌细胞系MCF-7、MDA-MB-231和SKBR-3,采用qPCR法检测癌组织和癌细胞系中miR-31-5p的表达水平。通过6 MV-X射线照射MCF-7细胞,构建放疗抵抗细胞株MCF-7R。随后,采用克隆形成实验、Transwell小室法和Annexin V/PI染色流式细胞术检测过表达/敲降miR-31-5p对MCF-7和MCF-7R细胞放疗敏感性的影响;用双荧光素酶报告基因验证miR-31-5p与TNS1的靶向关系。结果:乳腺癌组织、细胞系和MCF-7R细胞中miR-31-5p表达水平显著低于癌旁组织、人正常乳腺上皮细胞MCF-10A和MCF-7细胞(均P<0.01)。过表达miR-31-5p显著抑制MCF-7R细胞的侵袭并促进细胞凋亡(均P<0.01),沉默miR-31-5p在MCF-7细胞中结果相反。双荧光素酶报告基因法证实TNS1是miR-31-5p靶基因。过表达miR-31-5p通过靶向下调TNS1显著抑制MCF-7R细胞侵袭能力并促进细胞凋亡(均P<0.01),沉默miR-31-5p通过上调TNS1显著促进MCF-7细胞侵袭和抑制细胞凋亡(均P<0.01),从而上调MCF-7R对放射治疗的敏感性。结论:miR-31-5p/TNS1分子轴与乳腺癌放疗抵抗存在调控关系,且过表达miR-31-5p可逆转MCF-7R细胞对放疗抵抗作用。