miR-31通過激活NF-κB信號通路而促進(jìn)結(jié)腸癌細(xì)胞增殖
發(fā)布時(shí)間:2018-11-07 21:06
【摘要】:微小RNA(microRNA)在腫瘤的發(fā)生發(fā)展中發(fā)揮重要作用。有研究表明,在結(jié)腸癌患者腫瘤組織中,miR-31表達(dá)水平增高。然而,定量PCR只能檢測所在組織miR-31的整體表達(dá)水平,而無法觀察miR-31在特定組織與特定細(xì)胞中的表達(dá)分布。目前,尚未見關(guān)于miR-31在結(jié)腸癌中原位表達(dá)的報(bào)道。本文從研究miR-31在結(jié)腸癌中的原位表達(dá)入手,進(jìn)一步探究miR-31在結(jié)腸癌細(xì)胞中的功能及作用機(jī)制。原位雜交實(shí)驗(yàn)結(jié)果顯示,miR-31在結(jié)腸癌腫瘤細(xì)胞中的原位表達(dá)明顯升高;體外過表達(dá)或敲減miR-31證實(shí),其可以促進(jìn)結(jié)腸癌細(xì)胞增殖和集落形成;熒光定量PCR與Western印跡和雙熒光素酶報(bào)告基因?qū)嶒?yàn)證實(shí),在結(jié)腸癌細(xì)胞中,NF-κB通路的抑制因子絲氨酸/蘇氨酸激酶40(STK40)是miR-31下游靶基因,miR-31靶向作用于STK40而激活NF-κB通路;反之,抑制NF-κB通路,miR-31的促增殖能力明顯下降。上述結(jié)果提示,miR-31可能通過激活NF-κB信號通路而促進(jìn)結(jié)腸癌的細(xì)胞增殖。
[Abstract]:Micro RNA (microRNA) plays an important role in the development of tumor. Studies have shown that the expression of miR-31 is higher in cancer tissues of colon cancer patients. However, quantitative PCR can only detect the overall expression of miR-31 in tissues, but can not observe the distribution of miR-31 in specific tissues and cells. At present, there is no report on the expression of miR-31 in colon cancer. In order to explore the function and mechanism of miR-31 in colon cancer cells, we studied the in situ expression of miR-31 in colon cancer cells. The results of in situ hybridization showed that the in situ expression of miR-31 was significantly increased in colon cancer cells, and the overexpression or knockdown of miR-31 in vitro confirmed that it could promote the proliferation and colony formation of colon cancer cells. Fluorescence quantitative PCR, Western blot and double luciferase reporter gene experiments confirmed that the inhibitor of NF- 魏 B pathway, serine / threonine kinase 40 (STK40), was the downstream target gene of miR-31 in colon cancer cells. MiR-31 targets STK40 and activates NF- 魏 B pathway. On the contrary, inhibition of NF- 魏 B pathway significantly decreased the proliferative ability of miR-31. These results suggest that miR-31 may promote the proliferation of colon cancer cells by activating NF- 魏 B signaling pathway.
【作者單位】: 北京大學(xué)基礎(chǔ)醫(yī)學(xué)院生物化學(xué)與分子生物學(xué)系;北京大學(xué)第三醫(yī)院腫瘤放療科;北京大學(xué)基礎(chǔ)醫(yī)學(xué)院病理學(xué)系;北京大學(xué)第三醫(yī)院中心實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金(No.81672091,No.81541142) 北京市自然科學(xué)基金(No.7172232)資助~~
【分類號】:R735.35
[Abstract]:Micro RNA (microRNA) plays an important role in the development of tumor. Studies have shown that the expression of miR-31 is higher in cancer tissues of colon cancer patients. However, quantitative PCR can only detect the overall expression of miR-31 in tissues, but can not observe the distribution of miR-31 in specific tissues and cells. At present, there is no report on the expression of miR-31 in colon cancer. In order to explore the function and mechanism of miR-31 in colon cancer cells, we studied the in situ expression of miR-31 in colon cancer cells. The results of in situ hybridization showed that the in situ expression of miR-31 was significantly increased in colon cancer cells, and the overexpression or knockdown of miR-31 in vitro confirmed that it could promote the proliferation and colony formation of colon cancer cells. Fluorescence quantitative PCR, Western blot and double luciferase reporter gene experiments confirmed that the inhibitor of NF- 魏 B pathway, serine / threonine kinase 40 (STK40), was the downstream target gene of miR-31 in colon cancer cells. MiR-31 targets STK40 and activates NF- 魏 B pathway. On the contrary, inhibition of NF- 魏 B pathway significantly decreased the proliferative ability of miR-31. These results suggest that miR-31 may promote the proliferation of colon cancer cells by activating NF- 魏 B signaling pathway.
【作者單位】: 北京大學(xué)基礎(chǔ)醫(yī)學(xué)院生物化學(xué)與分子生物學(xué)系;北京大學(xué)第三醫(yī)院腫瘤放療科;北京大學(xué)基礎(chǔ)醫(yī)學(xué)院病理學(xué)系;北京大學(xué)第三醫(yī)院中心實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金(No.81672091,No.81541142) 北京市自然科學(xué)基金(No.7172232)資助~~
【分類號】:R735.35
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