长链非编码RNA SRGAP3-AS2异常表达通过Janus激酶信号调节非小细胞肺癌侵袭和迁移

目的 探讨长链非编码RNA(LncRNAs)SRGAP3反义RNA 2(SRGAP3 antisense RNA 2,SRGAP3-AS2)通过JAK信号调控非小细胞肺癌(NSCLC)细胞的增殖、迁移和侵袭。方法 检测NSCLC组织及H23细胞SRGAP3-AS2表达,分析SRGAP3-AS2表达与NSCLC临床病理的关系。将H23细胞分为对照组、SRGAP3-AS2过表达组和SRGAP3-AS2过表达+JAK2激动剂组。检测各组细胞增殖、迁移、侵袭、MMP-2、Bcl-2及p-JAK2和p-STAT3的表达。结果 SRGAP3-AS2在NSCLC组织呈低表达,与淋巴结转移和TNM分期有关(P<0.05)。与对照组比,SRGAP3-AS2过表达组细胞活力、划痕愈合率、侵袭细胞数、MMP-2、Bcl-2、p-JAK2和p-STAT3表达减少(P<0.05);与SRGAP3-AS2过表达组比,SRGAP3-AS2过表达+JAK2激动剂组细胞活力、细胞划痕愈合率、侵袭细胞数、MMP-2、Bcl-2、p-JAK2和p-STAT3表达增加(P<0.05)。结论 NSCLC组织SRGAP3-AS2呈低表达,与淋巴结转移和TNM分期有关,过表达SRGAP3-AS2可抑制JAK2/STAT3信号,抑制NSCLC细胞H23增殖、迁移和侵袭。

srGAP3在正常成年大鼠脑内的表达

目的 探讨slit roboGTP激活蛋白 3(slit roboGTPactivatedprotein 3,srGAP3)在正常成年大鼠中枢神经系统中的分布。 方法 应用免疫组织化学ABC法研究了srGAP3蛋白在正常成年大鼠脑内的分布和定位。 结果 srGAP3蛋白在正常成年大鼠脑中分布非常广泛 ,在脑内各主要结构如大脑皮质、海马、杏仁核、丘脑和下丘脑的部分核团、中脑、脑桥、小脑及延髓等均有表达。srGAP3免疫反应阳性物质位于神经元的细胞核周围。 结论 srGAP3蛋白在正常成年大鼠脑中有很广泛的表达 ,提示srGAP3蛋白在成年大鼠中枢神经系统的功能活动中可能也起重要作用。

Non-catalytic roles for TET1 protein negatively regulating neuronal differentiation through srGAP3 in neuroblastoma cells

The methylcytosine dioxygenases TET proteins （TET1, TET2, and TET3） play important regulatory roles in neural function. In this study, we investigated the role of TET proteins in neuronal differentiation using Neuro2a cells as a model. We observed that knockdown of TET1, TET2 or TET3 promoted neuronal differentiation of Neuro2a cells, and their overexpression inhibited VPA （valproic acid）-induced neuronal differentiation, suggesting all three TET proteins negatively regulate neu- ronal differentiation of Neuro2a cells. Interestingly, the inducing activity of TET protein is independent of its enzymatic activity. Our previous studies have demon- strated that srGAP3 can negatively regulate neuronal differentiation of Neuro2a cells. Furthermore, we revealed that TET1 could positively regulate srGAP3 expression independent of its catalytic activity, and srGAP3 is required for TET-mediated neuronal differentiation of Neuro2a cells. The results presented here may facilitate better understanding of the role of TET proteins in neuronal differentiation, and provide a possible therapy target for neuroblastoma.