基因组损失揭示了癌症的脆弱性
Deepak Nijhawan1, Travis I Zack, Yin Ren
1Departments of Cancer Biology and Medical Oncology, Dana Farber Cancer Institute, Boston, MA 02215, USA.
Cell
|August 21, 2012
概括
癌细胞利用基因组的不稳定性,导致基因拷贝数丢失. 研究人员确定了56个CYCLOPS (由于部分损失导致癌症负债的副本数变化) 基因,这些基因会产生脆弱性,如PSMC2,这对于癌症细胞生存至关重要.
科学领域:
- 癌症生物学 癌症生物学
- 基因组学就是基因组学.
- 分子瘤学分子瘤学
背景情况:
- 由于基因组不稳定性,癌细胞经常失去基因区域,影响瘤抑制基因等.
- 这种损失可以创建独特的漏洞,由癌细胞利用.
研究的目的:
- 识别那些在被抑制时,特别抑制癌细胞增殖的基因,并导致部分拷贝数丢失.
- 了解这些已识别的基因在癌症特异性负债中的作用.
主要方法:
- 对全基因组拷贝数和RNA干扰 (RNAi) 档案的综合分析.
- 鉴定抑制选择性损害细胞的基因,该基因的部分拷贝数丢失.
主要成果:
- 鉴定了56个CYCLOPS基因 (由于部分损失导致癌症负债的副本数量变化).
- 这些基因在结合体,蛋白质体和核糖体路径中得到丰富.
- 突出了蛋白酶组分PSMC2:正常细胞具有保护性的PSMC2复合体储存库,而PSMC2复制损失的细胞则缺失了这种储存库,使它们易受PSMC2抑制的影响.
结论:
- 发现了一种由基因组不稳定性和部分基因拷贝数损失引起的新一类癌症特异性脆弱性.
- CYCLOPS基因组,特别是PSMC2,代表了癌症治疗的潜在治疗标.
相关概念视频
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Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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