[Mechanism of TRIM27 promoting inflammatory response in lung cancer cells].

Objective: To investigate the mechanism of tripartite motif-containing 27 (TRIM27) expression promoting inflammatory response in non-small lung cancer cells. Methods: Ten cases of lung cancer tissues and their matched normal tissue (the distance was 5 cm of the tumor marginal) from patients underwent resection in the People's Hospital of Pingyang Hospital Affiliated to Wenzhou Medical University were collected. The expression of TRIM27 was identified by using real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) and western blot. TRIM27 knockdown experiment included negative control (NC(TRIM27)) group, TRIM27 short interfering RNA (siRNA) group, NC(TRIM27)+ TNF-α group and TRIM27 siRNA+ TNF-α group. Interlukin-6 (IL-6) knockdown experiment included NC(IL-6) group and IL-6 siRNA group. The protein expressions of TRIM27, TNFR1, TNFR2 and some TNFR related inflammation factors were verified by qRT-PCR and WB. Results: The expression levels of TRIM27 in NSCLC tissues of different stages (stage Ⅰ: 2.81±0.58, stage Ⅱ: 3.32±1.38, stage Ⅲ: 3.67±1.24) was higher than that in the adjacent normal tissues (1.01±0.15, 0.92±0.10 and 1.05±0.12, P<0.05). The expression levels of TRIM27 mRNA in NC(TRIM27) group and NC(TRIM27)+ TNF-α group were 0.94±0.12 and 1.67±0.03, and the expression levels of TRIM27 protein were 0.31±0.02 and 0.38±0.01, respectively (P<0.05). The expression levels of IL-6 mRNA in NC(TRIM27)+ TNF-α group and TRIM27 siRNA+ TNF-α group were 11.35±0.12 and 5.62±0.15, respectively, and the expression levels of VCAM-1 mRNA were 18.75±0.17 and 9.35±0.11, respectively. STAT3 mRNA expression levels were 16.54±0.10 and 8.12±0.10, respectively, with statistical significance (P<0.05). The expression levels of IL-6 mRNA in NC(IL-6) group and IL-6 siRNA group were 1.10±0.07 and 0.52±0.16, respectively, and the expression levels of STAT3 mRNA were 1.01±0.01 and 0.48±0.12, respectively. The expression levels of TRIM27 mRNA were 1.03±0.01 and 0.30±0.11, respectively, with statistical significance (P<0.05). Conclusion: The upregulation of TRIM27 in NSCLC tissue and cells promotes the expression of TNF-α, and may activate inflammatory response by regulating TNF-α-induced IL-6/STAT3 signaling pathway.目的： 探讨三结构域蛋白27(TRIM27)在非小细胞肺癌(NSCLC)细胞炎症反应中的作用机制。 方法： 收集2018—2019年于温州医科大学附属平阳医院接受手术治疗的NSCLC患者的癌组织和正常癌旁组织(距离癌组织5 cm)各10例，利用荧光定量聚合酶链反应(qRT-PCR)和Western blot法检测TRIM27 mRNA和蛋白的表达水平。TRIM27 siRNA敲减实验分为NC(TRIM27)组、TRIM27 siRNA组、NC(TRIM27)+TNF-α组、TRIM27 siRNA+TNF-α组；白细胞介素6(IL-6) siRNA敲减实验分为NC(IL-6)组和IL-6 siRNA组。采用Western blot法检测各组细胞系中TRIM27、肿瘤坏死因子受体1(TNFR1)、TNFR2以及TNFR相关炎症因子蛋白的表达水平。 结果： 不同分期NSCLC组织中TRIM27表达水平(Ⅰ期为2.81±0.58，Ⅱ期为3.32±1.38，Ⅲ期为3.67±1.24)均高于对应正常癌旁组织(分别为1.01±0.15、0.92±0.10和1.05±0.12，均P<0.05)。NC(TRIM27)组和NC(TRIM27)+TNF-α组细胞中TRIM27 mRNA的表达水平分别为0.94±0.12和1.67±0.03，TRIM27蛋白表达水平分别为0.31±0.02和0.38±0.01，差异均有统计学意义(均P<0.05)。NC(TRIM27)+TNF-α组和TRIM27 siRNA+TNF-α组细胞中IL-6 mRNA的表达水平分别为11.35±0.12和5.62±0.15，VCAM-1 mRNA的表达水平分别18.75±0.17和9.35±0.11，STAT3 mRNA表达水平分别16.54±0.10和8.12±0.10，差异均有统计学意义(均P<0.05)。NC(IL-6)组和IL-6 siRNA组细胞中IL-6 mRNA的表达水平分别为1.10±0.07和0.52±0.16，STAT3 mRNA的表达水平分别为1.01±0.01和0.48±0.12，TRIM27 mRNA的表达水平分别为1.03±0.01和0.30±0.11，差异均有统计学意义(均P<0.05)。 结论： NSCLC组织和细胞中，TRIM27呈高表达，且促进TNF-α基因的表达，可能通过调控TNF-α诱导IL-6/STAT3信号通路促进肺癌炎症反应的发生。.