AIM: To investigate the expression of Th22 cells and related cytokines in colorectal cancer(CRC) tissues, and the probably mechanism.METHODS: CRC tumor and paratumor tissues were collected to detect the expression lev...AIM: To investigate the expression of Th22 cells and related cytokines in colorectal cancer(CRC) tissues, and the probably mechanism.METHODS: CRC tumor and paratumor tissues were collected to detect the expression levels of Th22 cells and of related cytokines by immunohistochemistry, flow cytometry and real-time quantitative polymerase chain reaction(RT-q PCR).Interleukin(IL)-22 alone or with a STAT3 inhibitor was co-cultured with RKO cells in vitro to study the effects of IL-22 on colon cancer cells.IL-22 alone or with a STAT3 inhibitor was injected into a BALB/c nude mouse model with subcutaneously transplanted RKO cells to study the effects of IL-22 on colon cancer growth.RESULTS: The percentage of Th22 cells in the CD4+ T subset was significantly higher in tumor tissues compared with that in paratumor tissues(1.47% ± 0.083% vs 1.23% ± 0.077%, P < 0.05) as determined by flow cytometry.RT-qP CR analysis revealed that the m RNA expression levels of IL-22, aryl hydrocarbon receptor, CCL20 and CCL22 were significantly higher in tumor tissues compared with those in paratumor tissues.CCL27 mR NA also displayed a higher expression level in tumor tissues compared with that in paratumor tissues; however, these levels were not significantly different(2.58 ± 0.93 vs 2.30 ± 0.78, P > 0.05).IL-22 enhanced colon cancer cell proliferation in vitro and displayed anti-apoptotic effects; these effects were blocked by adding a STAT3 inhibitor.IL-22 promoted tumor growth in BALB/c nude mice; however, this effect was reversed by adding a STAT3 inhibitor.CONCLUSION: Th22 cells that accumulate in CRC may be associated with the chemotactic effect of the tumor microenvironment.IL-22 is associated with CRC development, most likely via STAT3 activation.展开更多
目的探讨胶原诱导的大鼠类风湿性关节炎(RA)模型中,Th22和白细胞介素-22(IL-22)的水平及其可能的机制。方法构建胶原诱导的大鼠RA模型后,流式细胞术检测Th22细胞,Real-time PCR检测IL-22 m R N A表达水平,ELISA检测IL-22蛋白表达水平;用...目的探讨胶原诱导的大鼠类风湿性关节炎(RA)模型中,Th22和白细胞介素-22(IL-22)的水平及其可能的机制。方法构建胶原诱导的大鼠RA模型后,流式细胞术检测Th22细胞,Real-time PCR检测IL-22 m R N A表达水平,ELISA检测IL-22蛋白表达水平;用IL-22封闭抗体中和R A大鼠体内IL-22后,CCK-8实验检测R AFLS细胞增殖,R eal-time PCR检测IL-22和STAT3 m R N A表达水平,Western blot检测STAT3蛋白表达水平。结果与对照组比较,RA大鼠全血中的Th22细胞和血清IL-22的表达显著增加(P<0.01);用IL-22封闭抗体中和R A大鼠体内IL-22后,与对照组比较,R A大鼠血清IL-22显著下降(P<0.01),R AFLS细胞增殖能力下降(P<0.01),R AFLS细胞中STAT3基因和蛋白水平的表达显著较少(P<0.01)。结论R A大鼠模型中,Th22细胞通过分泌过多的IL-22刺激STAT3信号途径,从而提升R AFLS细胞的增殖能力,参与大鼠RA的发病。展开更多
基金Supported by National Natural Science Foundation of China,No.81260316 and No.81260335
文摘AIM: To investigate the expression of Th22 cells and related cytokines in colorectal cancer(CRC) tissues, and the probably mechanism.METHODS: CRC tumor and paratumor tissues were collected to detect the expression levels of Th22 cells and of related cytokines by immunohistochemistry, flow cytometry and real-time quantitative polymerase chain reaction(RT-q PCR).Interleukin(IL)-22 alone or with a STAT3 inhibitor was co-cultured with RKO cells in vitro to study the effects of IL-22 on colon cancer cells.IL-22 alone or with a STAT3 inhibitor was injected into a BALB/c nude mouse model with subcutaneously transplanted RKO cells to study the effects of IL-22 on colon cancer growth.RESULTS: The percentage of Th22 cells in the CD4+ T subset was significantly higher in tumor tissues compared with that in paratumor tissues(1.47% ± 0.083% vs 1.23% ± 0.077%, P < 0.05) as determined by flow cytometry.RT-qP CR analysis revealed that the m RNA expression levels of IL-22, aryl hydrocarbon receptor, CCL20 and CCL22 were significantly higher in tumor tissues compared with those in paratumor tissues.CCL27 mR NA also displayed a higher expression level in tumor tissues compared with that in paratumor tissues; however, these levels were not significantly different(2.58 ± 0.93 vs 2.30 ± 0.78, P > 0.05).IL-22 enhanced colon cancer cell proliferation in vitro and displayed anti-apoptotic effects; these effects were blocked by adding a STAT3 inhibitor.IL-22 promoted tumor growth in BALB/c nude mice; however, this effect was reversed by adding a STAT3 inhibitor.CONCLUSION: Th22 cells that accumulate in CRC may be associated with the chemotactic effect of the tumor microenvironment.IL-22 is associated with CRC development, most likely via STAT3 activation.
文摘目的探讨胶原诱导的大鼠类风湿性关节炎(RA)模型中,Th22和白细胞介素-22(IL-22)的水平及其可能的机制。方法构建胶原诱导的大鼠RA模型后,流式细胞术检测Th22细胞,Real-time PCR检测IL-22 m R N A表达水平,ELISA检测IL-22蛋白表达水平;用IL-22封闭抗体中和R A大鼠体内IL-22后,CCK-8实验检测R AFLS细胞增殖,R eal-time PCR检测IL-22和STAT3 m R N A表达水平,Western blot检测STAT3蛋白表达水平。结果与对照组比较,RA大鼠全血中的Th22细胞和血清IL-22的表达显著增加(P<0.01);用IL-22封闭抗体中和R A大鼠体内IL-22后,与对照组比较,R A大鼠血清IL-22显著下降(P<0.01),R AFLS细胞增殖能力下降(P<0.01),R AFLS细胞中STAT3基因和蛋白水平的表达显著较少(P<0.01)。结论R A大鼠模型中,Th22细胞通过分泌过多的IL-22刺激STAT3信号途径,从而提升R AFLS细胞的增殖能力,参与大鼠RA的发病。
