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Cancer Cell:癌症凋亡细胞的突变种(BIK-DD)可引发胰腺癌干细胞凋亡

2012-04-17 新华网 新华网

4月14日,台湾《联合晚报》报道说,台湾“中央研究院”院士洪明奇领导的研究团队从正常细胞中找到一种癌症凋亡细胞的突变种(BIK-DD),适度表现后,可引起癌症干细胞的凋亡,却不会误杀正常细胞,可望给几无存活机会的胰脏癌患者带来生机。 洪明奇14日出席相关研讨会并发表特别演讲,他的研究成果引起与会癌症医学专家热烈讨论。相关研究成果刊登在了国际杂志Cancer Cell上。 报道说,胰脏癌患者的5

4月14日,台湾《联合晚报》报道说,台湾“中央研究院”院士洪明奇领导的研究团队从正常细胞中找到一种癌症凋亡细胞的突变种(BIK-DD),适度表现后,可引起癌症干细胞的凋亡,却不会误杀正常细胞,可望给几无存活机会的胰脏癌患者带来生机。

洪明奇14日出席相关研讨会并发表特别演讲,他的研究成果引起与会癌症医学专家热烈讨论。相关研究成果刊登在了国际杂志Cancer Cell上。

报道说,胰脏癌患者的5年存活率只有3%至4%,几乎是所有癌症患者中最低的,胰脏癌因此又有“癌症中的癌症”之称。洪明奇完成的动物实验发现,经过癌症凋亡细胞突变种治疗后的胰脏癌老鼠,肿瘤均明显变小,而且六成以上可存活1年以上;反观未接受治疗的对照组老鼠,全部在三四十天后即死亡。

洪明奇说,不少癌症经化学治疗及放射线治疗后,仍会在一段时间后复发,主要是癌症干细胞的分化能力太强,如果未能彻底歼灭,即可能复发并蔓延,防不胜防。他采取的基因治疗模式,就是想办法让癌症干细胞自然凋亡,而达到彻底治疗目的。

洪明奇研究团队采用的癌症凋亡细胞(BIK)一般人体内就有,即存在于正常细胞里,也存在于癌细胞中;但这种凋亡细胞平常并不会特别表现,无法杀死癌症干细胞。洪明奇找到癌症凋亡细胞的突变种(BIK-DD),且可调控到让它只在癌症干细胞中大量表现,而不会表现于正常细胞中。

doi:10.1016/j.ccr.2011.12.006
PMC:
PMID:

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.

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    2012-06-04 维他命
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旨在提高癌症治疗的结果的抗血管生成药物和纳米药物两种治疗策略的结合只有当使用最小纳米药物的时候,这两种治疗策略的结合才可能是成功的。美国马萨诸塞州总医院(MGH)研究人员在《自然纳米技术》上发表文章称:肿瘤组织内血管正常化能提高标准化疗药物的传递,可以阻止更大的纳米药物分子进入肿瘤血管。 麻省总医院放射肿瘤科斯蒂尔肿瘤生物学实验室Vikash P. Chauhan说:我们发现血管正常化不仅促

Cell:激酶试验可能对研究癌症耐药性的产生有帮助

4月12日发表在《细胞》杂志的一项研究论文中,北卡罗莱纳大学教堂山分校研究人员介绍一种蛋白激酶测试技术可以研究癌症抗药性的机制,为肿瘤联合疗法的确定提供判断依据。 激酶在人体组织中发挥关键作用,特别是对癌症细胞的生长尤为重要。在518个已知的人类激酶中,约400个在癌症中表达,但在肿瘤中有哪一种激酶以及多少激酶是实际发挥作用的很难衡量。癌症研究人员为开发激酶抑制剂治疗癌症付出了巨大努力,一些药物

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癌细胞基因突变可导致治疗治疗抵抗,这可能也会导致肿瘤复发,但根据发表在PLoS Biology杂志上的一项新研究证实:也许在基因突变前,耐药性就已经出现了。 芝加哥大学Marsha Rosner和加州大学Irvine分校Steven Frank研究证实在基因变化发生之前,就有少数细胞产生耐药性,而后这些细胞发生基因改变以中和治疗。 为什么基因突变之前就有细胞产生耐药性 目前,科学家们坚信细胞

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近日,瑞典研究人员在《柳叶刀肿瘤学》杂志上发表论文称:亨廷顿氏症或其他疾病被称为多聚谷氨酰胺(polyQ蛋白)疾病的罹患癌症的风险较低,其原因为一种常见的遗传机制。 多聚谷氨酰胺(polyQ蛋白)疾病是一种罕见的神经退化性疾病。 多聚谷氨酰胺(polyQ蛋白)疾病包括脊髓延髓性肌萎缩症(SBMA)、亨廷顿氏病(HD),齿状核红核苍白球丘脑下部核萎缩,以及六种类型的脊髓小脑性共济失调。polyQ

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