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一种与胰腺癌风险相关的常见CTRB错折变异在小鼠中引起ER压力和炎症

Cristina Bodas¹, Irene Felipe^1,2, Brice Chanez^1,3

¹Epithelial Carcinogenesis Group, Molecular Oncology Programme, Centro Nacional de Investigaciones Oncológicas, Madrid, Spain.

|April 20, 2025

概括

一种新的小鼠模型显示,CTRB1基因中的特定缺失会导致细胞内膜网膜 (ER) 的压力和炎症,导致胰腺癌风险.

科学领域:

遗传学和基因组学遗传学和基因组学
分子生物学分子生物学
癌症研究癌症研究

背景情况:

全基因组关联研究 (GWAS) 将一个CTRB2外因子6删除变异与胰腺癌风险增加联系起来.
这种变异的确切因果作用仍然需要阐明.

研究的目的:

为了研究CTRB2的功能后果6外删除变体.
开发和分析一个模仿人类变异的小鼠模型,在Ctrb2的正义词中,Ctrb1.

主要方法:

通过CRISPR/Cas9基因编辑,在小鼠Ctrb1第6个异构体中产生了707bp的删除.
3个月后对同卵性和异卵性突变小鼠进行表型分析.
进行了超结构,转录和功能测试 (胰腺炎恢复).

主要成果:

Ctrb1 突变小鼠在内质网膜 (ER) 中呈现了截断的CTRB1积累,导致ER压力和炎症.
同性卵性突变体显示胰腺功能减弱 (胆素活性,蛋白质合成,粉酶分泌) 和胰腺炎恢复受损.
转录组分析揭示了激活的ER应激反应和炎症途径,其特征丰富于CTRB2变种的人类载体.

结论:

在Ctrb1外因子6删除小鼠模型表明,这种遗传变化导致ER压力和炎症.
这种模型是了解CTRB2变种对胰腺癌的贡献的宝贵工具.
这些发现为确定与这种变种相关的胰腺癌的预防策略铺平了道路.

关键词:

癌症遗传学癌症遗传学实验性的胰腺炎炎症是一种炎症.胰腺癌是一种癌症.

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