4月14日,,臺灣《聯(lián)合晚報》報道說,,臺灣“中央研究院”院士洪明奇領(lǐng)導(dǎo)的研究團(tuán)隊(duì)從正常細(xì)胞中找到一種癌癥凋亡細(xì)胞的突變種(BIK-DD),適度表現(xiàn)后,,可引起癌癥干細(xì)胞的凋亡,卻不會誤殺正常細(xì)胞,可望給幾無存活機(jī)會的胰臟癌患者帶來生機(jī),。
洪明奇14日出席相關(guān)研討會并發(fā)表特別演講,他的研究成果引起與會癌癥醫(yī)學(xué)專家熱烈討論,。相關(guān)研究成果刊登在了國際雜志Cancer Cell上,。
報道說,胰臟癌患者的5年存活率只有3%至4%,,幾乎是所有癌癥患者中最低的,,胰臟癌因此又有“癌癥中的癌癥”之稱。洪明奇完成的動物實(shí)驗(yàn)發(fā)現(xiàn),經(jīng)過癌癥凋亡細(xì)胞突變種治療后的胰臟癌老鼠,,腫瘤均明顯變小,,而且六成以上可存活1年以上;反觀未接受治療的對照組老鼠,,全部在三四十天后即死亡,。
洪明奇說,不少癌癥經(jīng)化學(xué)治療及放射線治療后,,仍會在一段時間后復(fù)發(fā),,主要是癌癥干細(xì)胞的分化能力太強(qiáng),如果未能徹底殲滅,,即可能復(fù)發(fā)并蔓延,,防不勝防。他采取的基因治療模式,,就是想辦法讓癌癥干細(xì)胞自然凋亡,,而達(dá)到徹底治療目的。
洪明奇研究團(tuán)隊(duì)采用的癌癥凋亡細(xì)胞(BIK)一般人體內(nèi)就有,,即存在于正常細(xì)胞里,,也存在于癌細(xì)胞中;但這種凋亡細(xì)胞平常并不會特別表現(xiàn),,無法殺死癌癥干細(xì)胞,。洪明奇找到癌癥凋亡細(xì)胞的突變種(BIK-DD),且可調(diào)控到讓它只在癌癥干細(xì)胞中大量表現(xiàn),,而不會表現(xiàn)于正常細(xì)胞中,。(生物谷Bioon.com)
doi:10.1016/j.ccr.2011.12.006
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KrasG12D-Induced IKK2/β/NF-κB Activation by IL-1α and p62 Feedforward Loops Is Required for Development of Pancreatic Ductal Adenocarcinoma
Jianhua Ling1, Ya'an Kang2, Ruiying Zhao1, Qianghua Xia1, 4, Dung-Fang Lee5, Zhe Chang1, 4, Jin Li6, Bailu Peng7, Jason B. Fleming2, Huamin Wang3, 4, Jinsong Liu3, 4, Ihor R. Lemischka5, Mien-Chie Hung1, 4, 8, Paul J. Chiao1, 4, ,
Constitutive Kras and NF-κB activation is identified as signature alterations in pancreatic ductal adenocarcinoma (PDAC). However, how NF-κB is activated in PDAC is not yet understood. Here, we report that pancreas-targeted IKK2/β inactivation inhibited NF-κB activation and PDAC development in KrasG12D and KrasG12D;Ink4a/ArfF/F mice, demonstrating a mechanistic link between IKK2/β and KrasG12D in PDAC inception. Our findings reveal that KrasG12D-activated AP-1 induces IL-1α, which, in turn, activates NF-κB and its target genes IL-1α and p62, to initiate IL-1α/p62 feedforward loops for inducing and sustaining NF-κB activity. Furthermore, IL-1α overexpression correlates with Kras mutation, NF-κB activity, and poor survival in PDAC patients. Therefore, our findings demonstrate the mechanism by which IKK2/β/NF-κB is activated by KrasG12D through dual feedforward loops of IL-1α/p62.