Wnt/beta-catenin signaling pathway plays a key role in the metastasis of colorectal cancer, However, detailed mechanism is not clear. our previously data have shown HIPK2 can promote beta-catenin/TCF/LEF complex dissociation, Bushen Jiedu Sanjie Recipe can inhibits CRC metastasis via upregulates the HIPK2 expression,down regulate the beta-catenin and the downstream target gene CyclinD1 expression. We propose that HIPK2 regulates beta-catenin-TCF/LEF signaling pathway to prohibit the invasion and metastasis of CRC.The project proposes to use the HIPK2+/+ colorectal cancer cell line and colon cancer in nude mice model by plasmid transfection and animal imaging technology, to explore the mechanism of HIPK2 regulating beta-catenin-TCF/LEF signaling pathway, and to make clear the mechanism of Bushen Jiedu Sanjie Recipe activating beta-catenin-TCF/LEF signaling pathway and CRC metastasis via HIPK2. To provide the experimental basis for the Chinese herbal compound against invasion and metastasis of colorectal cancer.
研究发现Wnt/β-catenin信号通路是大肠癌侵袭转移的重要环节,但Wnt/β-catenin信号通路的调控机制尚不清楚。我们前期研究发现HIPK2可以促进β-catenin/LEF/TCF复合体解离,补肾解毒散结方可上调HIPK2表达,下调β-catenin及其下游靶基因CyclinD1的表达抑制大肠癌侵袭转移,由此我们推测HIPK2通过调控β-catenin-TCF/LEF信号通路抑制大肠癌侵袭转移。因此,本课题通过建立稳定过表达HIPK2肠癌细胞株及肠癌裸鼠移植瘤模型,采用质粒转染、动物活体成像等技术,探讨HIPK2调控β-catenin-TCF/LEF信号通路的机制,同时明确补肾解毒散结方通过HIPK2调控β-catenin-TCF/LEF信号通路抑制大肠癌侵袭转移的作用机理,为研究中药抗大肠癌侵袭转移提供实验依据。
大肠癌侵袭转移是一个动态的、多步骤的、复杂的多级联反应过程,除与肿瘤细胞本身的扩散转移性质相关外,还与肿瘤的微环境改变以及转移的靶向性有关。在肿瘤发生侵袭转移的整个过程中,癌细胞降解突破基底膜,侵入血管和淋巴管进入循环系统,甚至侵出血管和淋巴管形成远处转移灶。这不仅涉及到基质金属蛋白酶、促血管生成因子和细胞粘附分子等,更离不开多种信号传导通路的作用。近几年的研究中发现,Wnt/β-catenin信号通路是与大肠癌等多种肿瘤发生最为密切相关的信号通路,Wnt/β-catenin信号通路的异常激活对于大肠癌的发生发展至关重要。.我们前期研究发现补肾解毒散结方可上调HIPK2表达,下调β-catenin及其下游靶基因CyclinD1的表达抑制大肠癌侵袭转移,但具体机制尚不清楚,由此我们提出HIPK2通过调控β-cat-TCF/LEF信号通路抑制大肠癌侵袭转移的科学假说。.本课题建立稳定表达HIPK2+/+肠癌细胞株及肠癌裸鼠移植瘤为模型,采用WB、荧光定量PCR等技术,探讨HIPK2调控β-cat-TCF/LEF信号通路机制,进一步发现补肾解毒散结方通过HIPK2调控细胞浆内β-catenin积聚及其核移位,与染色体DNA的T细胞因子/淋巴增强因子(T cell factor/ lymphoid enhancer factor, TCF/LEF)位点结合,协同激活下游靶基因的转录和表达,是促使肿瘤侵袭转移的重要环节,这对于明确防治大肠癌侵袭转移的作用靶点,具有重要的科学意义。
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数据更新时间:2023-05-31
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