Previous studies demonstrated that, GOLPH3 can promote the progression of Hepatocellular carcinoma (HCC) by activating NF-κB (published), and we found GOLPH3 can bind with TNFR and TRIM37, a new oncoprotein. However, the clinical significance of TRIM37 in HCC, its biological function and molecular mechanism remains unknown. In preliminary experiments, we found that TRIM37 is highly expressed in liver, and it is associated with the clinical stage and prognosis. Through stablishing stable cell lines of overexpressing and silencing TRIM37 in Huh-7 cells, we found that TRIM37 promotes cell proliferation, migration, angiogenesis, inhibiting apoptosis, and luciferase activity experiments results further showed that NF-κB signaling pathway is activated by overexpressing TRIM37. On this basis, we will expand the sample size and try to prove that TRIM37 could be used as a biomarker for diagnosis and prognosis, and that TRIM37 promote the progression of HCC in other HCC cell line and in nude mice in vivo. Furthermore, through immunoprecipitation and other methods, we will prove the hypothesis that TRIM37 binds to GOLPH3 and TNFR, and promotes the ubiquitination in the position of K63, thus activating NF-κB signaling pathway to promote the progression of HCC, providing new clues for the diagnosis and treatment of HCC.
我们前期研究证明,GOLPH3可通过激活NF-κB促进肝癌发展(已发表),并且发现GOLPH3与TNFR及一种新的癌蛋白TRIM37结合。然而,TRIM37在肝癌中的临床意义及生物学功能仍未知。在预实验中,我们发现TRIM37在肝癌中高表达,其表达与患者临床级别及预后相关。通过建立稳定高表达及沉默TRIM37表达的Huh-7细胞系,我们发现TRIM37促进细胞增殖、迁移、血管新生,抑制细胞凋亡,进一步采用荧光素酶活性实验发现TRIM37激活NF-κB信号通路。在此基础上,本项目将扩大样本证明TRIM37可作为肝癌诊断、预后标志物,并在其它细胞系及裸鼠体内验证TRIM37促进肝癌发展,还将通过免疫蛋白共沉淀法等阐明TRIM37与GOLPH3及TNFR结合,促进TRAF2、RIP、NEMO的K63位泛素化,激活NF-κB信号通路从而促进肝癌发展的新假说,为肝癌的诊断及治疗提供新的线索。
寻找新的肿瘤诊断及预后标志物,对于肿瘤早期筛查早期发现早期治疗具有重要意义,有利于区分不同患者的临床疗效和进一步个体化治疗。另外,研究肿瘤发展的调控及其分子机制,是目前肿瘤研究中的热点,不仅为了解肿瘤发展机制开拓新视野,还将对肿瘤治疗具有重要指导意义。我们阐明了TRIM37在肝癌中高表达,与临床预后呈负相关,可作为潜在的肝癌诊断及预后标志物,并研究发现TRIM37通过激活NF-κB信号通路促进肝癌细胞增殖、迁移、血管新生及抗凋亡。另外,我们也在TCGA数据库中分析发现TRIM37在非小细胞肺癌中高表达,与预后呈负相关,并且研究发现TRIM37参与调控非小细胞肺癌异常增殖、血管新生、抗凋亡等生物学功能,揭示TRIM37在多种肿瘤中高表达,与临床分级、预后相关,可作为潜在的早期诊断标志物。进一步研究分子机制,我们发现TRIM37通过与TRAF2结合,促进TRAF2的K63位泛素化,持续性激活NF-κB信号通路,从而促进肿瘤的发展。将TRIM37 E3连接酶活性区域重要位点突变,TRAF2 K63泛素化水平降低,NF-κB转录活性被抑制(已发表于The Journal of pathology)。我们的研究发现TRIM37是个重要癌基因,促进肿瘤发展,为肿瘤治疗提供可能的治疗靶点。另外,我们研究了与TRIM37结合的相关蛋白,包括TRIP6、CHP2等。我们发现TRIP6在肝癌中高表达,促进肝癌细胞增殖(已发表于Biochemical and Biophysical Research Communications)。CHP2通过激活AKT/FOXO3a信号通路促进乳腺癌细胞G1/S转变,诱导细胞增殖(已发表于Molecular cancer research)。这一系列研究为进一步寻找肿瘤诊断及预后标志物提供方向,阐明了在肿瘤调控网络中癌基因间相互作用及癌基因促进肿瘤发展的分子机制,为寻找新的肿瘤治疗靶点提供科学依据。
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数据更新时间:2023-05-31
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