Objective: To study the effect of lentivirus-mediated integrin αVβ3-sh RNA on tumor growth of mice with lung cancer xenograft. Methods: Lung cancer tissue, paracancer tissue and normal tissue were collected and inte...Objective: To study the effect of lentivirus-mediated integrin αVβ3-sh RNA on tumor growth of mice with lung cancer xenograft. Methods: Lung cancer tissue, paracancer tissue and normal tissue were collected and integrin αVβ3 expression was detected; BALB/c nude mice were selected, divided into integrin αVβ3 knockdown group(KD group) and negative control group(NC group), and inoculated with cells stably infected by integrin αVβ3-sh RNA lentivirus and cells stably infected by negative control-sh RNA lentivirus respectively, the growth of tumor tissue was continuously observed, and the number of apoptosis cells as well as the expression of angiogenesis, apoptosis and invasion genes in tumor tissue were detected. Results: m RNA content and protein content of integrin αVβ3 in lung cancer tissue were significantly higher than those in paracancer tissue and normal tissue; increasing trend of tumor tissue volume of KD group was weaker than that of NC group, and tumor volume at various points in time of KD group was lower than that of NC group; m RNA contents and protein contents of VEGF, FGF, EGF, Bcl-2, MMP-9, MMP-12 and MMP-13 in tumor tissue of KD group were lower than those of NC group, and apoptosis index as well as m RNA content and protein content of Bax were higher than those of NC group. Conclusions: The expression of integrin αVβ3 increases in lung cancer tissue, and lentivirus-mediated integrin αVβ3-sh RNA can inhibit tumor growth of mice with lung cancer xenografts.展开更多
目的:探讨肺抑瘤合剂对肺癌A549细胞系裸鼠皮下移植瘤生长的抑制作用并探讨其机制。方法:建立肺癌A549细胞系裸鼠移植瘤动物模型,随机分为对照组、肺抑瘤合剂组及顺铂组灌胃或腹腔注射给药干预,观察肺抑瘤合剂对裸鼠移植瘤生长的影响;采...目的:探讨肺抑瘤合剂对肺癌A549细胞系裸鼠皮下移植瘤生长的抑制作用并探讨其机制。方法:建立肺癌A549细胞系裸鼠移植瘤动物模型,随机分为对照组、肺抑瘤合剂组及顺铂组灌胃或腹腔注射给药干预,观察肺抑瘤合剂对裸鼠移植瘤生长的影响;采用Real-Time PCR方法检测表皮生长因子受体(EGFR)表达,Western-Blot方法检测EGFR、P38、GSK3β和AKT表达。结果:肺抑瘤合剂有较为明显的抑瘤效果(P<0.05)。与对照组相比,肺抑瘤合剂组和顺铂组移植瘤组织中EGFR m RNA表达水平明显下调(P<0.05)。EGFR及p-EGFR蛋白水平有下降趋势,但无统计学意义。P38、GSK3β及AKT蛋白表达无明显变化,而p-P38、p-GSK3β及p-AKT的水平明显下调(P<0.05)。结论:肺抑瘤合剂对肺癌A549裸鼠移植瘤有明显抑制作用,可能通过抑制P38、GSK3β和AKT蛋白的磷酸化水平,起到抑制移植瘤生长的效果。展开更多
基金supported by Surface Project of National Natural Science Foundation of China(No 81573026)
文摘Objective: To study the effect of lentivirus-mediated integrin αVβ3-sh RNA on tumor growth of mice with lung cancer xenograft. Methods: Lung cancer tissue, paracancer tissue and normal tissue were collected and integrin αVβ3 expression was detected; BALB/c nude mice were selected, divided into integrin αVβ3 knockdown group(KD group) and negative control group(NC group), and inoculated with cells stably infected by integrin αVβ3-sh RNA lentivirus and cells stably infected by negative control-sh RNA lentivirus respectively, the growth of tumor tissue was continuously observed, and the number of apoptosis cells as well as the expression of angiogenesis, apoptosis and invasion genes in tumor tissue were detected. Results: m RNA content and protein content of integrin αVβ3 in lung cancer tissue were significantly higher than those in paracancer tissue and normal tissue; increasing trend of tumor tissue volume of KD group was weaker than that of NC group, and tumor volume at various points in time of KD group was lower than that of NC group; m RNA contents and protein contents of VEGF, FGF, EGF, Bcl-2, MMP-9, MMP-12 and MMP-13 in tumor tissue of KD group were lower than those of NC group, and apoptosis index as well as m RNA content and protein content of Bax were higher than those of NC group. Conclusions: The expression of integrin αVβ3 increases in lung cancer tissue, and lentivirus-mediated integrin αVβ3-sh RNA can inhibit tumor growth of mice with lung cancer xenografts.
文摘目的:探讨肺抑瘤合剂对肺癌A549细胞系裸鼠皮下移植瘤生长的抑制作用并探讨其机制。方法:建立肺癌A549细胞系裸鼠移植瘤动物模型,随机分为对照组、肺抑瘤合剂组及顺铂组灌胃或腹腔注射给药干预,观察肺抑瘤合剂对裸鼠移植瘤生长的影响;采用Real-Time PCR方法检测表皮生长因子受体(EGFR)表达,Western-Blot方法检测EGFR、P38、GSK3β和AKT表达。结果:肺抑瘤合剂有较为明显的抑瘤效果(P<0.05)。与对照组相比,肺抑瘤合剂组和顺铂组移植瘤组织中EGFR m RNA表达水平明显下调(P<0.05)。EGFR及p-EGFR蛋白水平有下降趋势,但无统计学意义。P38、GSK3β及AKT蛋白表达无明显变化,而p-P38、p-GSK3β及p-AKT的水平明显下调(P<0.05)。结论:肺抑瘤合剂对肺癌A549裸鼠移植瘤有明显抑制作用,可能通过抑制P38、GSK3β和AKT蛋白的磷酸化水平,起到抑制移植瘤生长的效果。
