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Cancer Res:新化疗药物可以特异性杀伤抗药肿瘤

2016-06-10 佚名 生物谷

近日,来自美国和韩国的科学家们在国际学术期刊Cancer research上发表了一项最新研究进展,他们发现一种具有基因毒性的小分子能够对存在DNA错配修复机制缺陷的癌细胞发挥特异性杀伤作用。该研究为癌症的精准治疗提供了一种新选择。   利用具有基因毒性的小分子干扰癌细胞的分裂是开发化疗药物的一个主要目标,但是存在DNA错配修复缺陷的癌细胞会对大多数传统化疗药物产生抵抗。在这项最新研

近日,来自美国和韩国的科学家们在国际学术期刊Cancer research上发表了一项最新研究进展,他们发现一种具有基因毒性的小分子能够对存在DNA错配修复机制缺陷的癌细胞发挥特异性杀伤作用。该研究为癌症的精准治疗提供了一种新选择。
 
利用具有基因毒性的小分子干扰癌细胞的分裂是开发化疗药物的一个主要目标,但是存在DNA错配修复缺陷的癌细胞会对大多数传统化疗药物产生抵抗。在这项最新研究中,研究人员发现一种叫做baicalein的小分子能够特异性杀伤存在DNA错配修复缺陷的癌细胞。
 
他们首先发现baicalein能够优先结合发生错配的DNA,并通过错配修复依赖性机制诱导DNA损伤应答。MutSα是参与DNA错配修复的一个关键蛋白,研究人员发现在存在MutSα的细胞中,baicalein能够与MutSα结合解除其与CHK2的相互作用导致S期停滞以及细胞存活。但是在缺失MutSα的癌细胞中,由于baicalein的存在以及MutSα的缺失导致癌细胞无法正常进行DNA错配修复,细胞内出现大量DNA双链断裂,进而导致了细胞凋亡的发生。
 
除此之外,研究人员还在异种移植肿瘤小鼠模型中检测了baicalein的作用,发现baicalein同样能够对缺失MutSα的癌细胞发挥特异性杀伤作用,导致肿瘤萎缩。他们还在结肠特异性敲除MSH2的小鼠中建立AOM-DSS诱导的结肠肿瘤,随后用baicalein进行治疗,也可以抑制肿瘤的生长。
 
总的来说,这项研究发现baicalein对于存在DNA错配修复机制缺陷的癌细胞具有特异性杀伤作用,该研究或将为患有该类肿瘤的病人提供一个更好的治疗选择。.   
 
原始出处
 
Yongliang Zhang1, Jennifer T Fox1, Young-Un Park2, Gene Elliott1, Ganesha Rai3, Mengli Cai4, Srilatha Sakamuru3, Ruili Huang3, Menghang Xia3, Kyeryoung Lee5, Min Ho Jeon6, Bijoy p Mathew6, Hee Dong Park7, Winfried Edelmann5, Chan Young Park8, Sung You Hong9, David Maloney3, and Kyungjae Myung.A novel chemotherapeutic agent to treat tumors with DNA mismatch repair deficiencies.Cancer Res.2016

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    2016-06-11 JBY

    学习,学习,学习

    0

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    2016-06-10 milkshark

    值得研究

    0

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    2016-06-10 milkshark

    的确厉害

    0

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