乘客删除会在癌症中产生治疗漏洞
Florian L Muller1, Simona Colla, Elisa Aquilanti
1Department of Genomic Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.
癌细胞中被删除的enolase 1 (ENO1) 基因对以ENO1为向的疗法具有脆弱性. 沉默相关的ENO2基因选择性地抑制这些癌细胞,揭示了潜在的新治疗策略.
科学领域:
- 癌症基因组学 癌症基因组学
- 分子瘤学分子瘤学
- 药物发现 药物发现 药物发现
背景情况:
- 在癌症中,通过 homozygous 删除激活瘤抑制基因是常见的.
- 这些删除可以影响邻近的基因 (乘客基因).
- 乘客基因删除可能会造成治疗脆弱性,如果它们影响到必不可少的,冗余的基因家族.
研究的目的:
- 调查癌症中基因删除引起的附带漏洞的治疗潜力.
- 探索糖性基因酶1 (ENO1) 缺失在质母细胞瘤 (GBM) 中的作用.
- 评估针对ENO1删除的GBM中多余的enolase家族成员的影响.
主要方法:
- 利用短毛RNA (shRNA) 沉默GBM细胞中的酶2 (ENO2).
- 评估了ENO2沉默对GBM细胞生长,存活率和瘤发生潜力的影响.
- 在ENO1-删除与ENO1-完整的GBM细胞和正常星体细胞中评估了酶抑制剂酸酸的选择性毒性.
主要成果:
- 通过短毛RNA介导的ENO2沉默选择性地抑制了ENO1删除的GBM细胞的生长,存活和瘤发生潜力.
- 乙醇酶抑制剂酸酸酸对ENO1删除的GBM细胞具有选择性毒性.
- 删除ENO1的GBM细胞耐受了因ENO2表达而导致的ENO1损失.
结论:
- 在GBM中同胞性删除ENO1创建了一个附带漏洞,可以通过准ENO2.2来利用.
- 酶抑制剂对具有ENO1缺失的GBM细胞具有选择性毒性.
- 附带脆弱性的原则为患有乘客基因缺失的癌症提供了一个有前途的治疗策略.
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