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缺乏Myc增强剂 (包括人类SNP rs6983267) 的小鼠对肠道瘤具有抗性
Inderpreet Kaur Sur1, Outi Hallikas, Anna Vähärautio
1Science for Life Center, Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.
概括
靠近MYC瘤基因的癌症相关遗传变异可以影响癌症风险. 这项研究表明,在小鼠中禁用一个关键的调节元件 (Myc-335) 会对肠道瘤产生抵抗力,证实了这些SNP在体内作用.
科学领域:
- 遗传学 是一个遗传学.
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 与癌症相关的单核酸多态 (SNPs) 在染色体8q24的MYC瘤基因附近发现.
- 这些与癌症相关的SNP可能会改变MYC基因表达,可能影响癌症的发展,但直接的功能证据是有限的.
研究的目的:
- 为了研究特定的MYC调节元件Myc-335的体内功能,Myc-335含有与癌症相关的SNP rs6983267.
- 在小鼠模型中确定破坏Myc-335是否会影响MYC表达和对肠道瘤发生的易感性.
主要方法:
- 产生特别缺乏Myc-335调节元件的小鼠.
- 在突变和野生型小鼠的肠道密室中分析Myc转录水平.
- 评估由APCmin突变诱导的Myc-335无基因小鼠的肠道瘤发生.
主要成果:
- 与野生型 littermates 相比,缺乏Myc-335的小鼠在肠道密室中的Myc转录水平略有降低.
- 尽管没有明显的物理表型,但突变小鼠对APCmin诱导的肠道瘤形成表现出显著的抵抗力.
- 这些发现表明Myc-335元素在调节瘤发生过程中的功能作用.
结论:
- 在Myc-335元素中的与癌症相关的SNPrs6983267具有可证明的体内功能.
- 这种MYC调节元件的干扰会对肠癌的发展产生抵抗力.
- 这项研究验证了这样一个假设,即在监管区域中与癌症相关的SNP可以影响癌症易感性.
相关概念视频
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In-vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.

