与胰腺癌风险相关的常见的CTRB错折变体导致小鼠ER压力和炎症
bioRxiv : the preprint server for biology
|August 30, 2024
概括
一种携带CTRB1删除变异的新小鼠模型显示,它会导致ER压力和炎症,导致胰腺癌风险. 该模型有助于了解疾病机制,并制定预防策略.
科学领域:
- 遗传学和分子生物学
- 在瘤学瘤学.
- 胃肠病学 胃肠病学
背景情况:
- 全基因组关联研究将CTRB2外因子6缺失与胰腺癌风险增加联系起来.
- 消化酶的错误折叠与胰腺疾病有关.
- CTRB2 是人类胰腺状细胞中非常丰富的蛋白质.
研究的目的:
- 调查CTRB2外因子6缺失变异在胰腺癌发展中的因果作用.
- 创建和描述模仿人类CTRB2删除变异的小鼠模型.
主要方法:
- 通过CRISPR/Cas9基因编辑,在小鼠中创建了Ctrb1^Δexon6删除 (Ctrb1^Δexon6).
- 对突变小鼠进行了表型,超结构和转录组分析.
- 挑战小鼠患有caerulein诱导的胰腺炎,以评估恢复.
主要成果:
- 这种Ctrb1^Δexon6突变导致CTRB1在ER中缩积累,导致ER应激和炎症.
- 突变小鼠表现出胰腺胆素活性降低,蛋白质合成受损,以及对胰腺炎的敏感性.
- 转录组分析揭示了acinar程序的下调和ER压力和炎症通路的上调.
- 来自突变小鼠的转录组签名被丰富在来自CTRB2变种载体的人类胰腺样本中.
结论:
- 鼠标模型Ctrb1^Δexon6在体内提供了证据,证明该变异导致ER压力和炎症.
- 这种模型对于研究CTRB2变体相关的胰腺癌风险背后的机制非常有价值.
- 结果表明ER减压和抗炎药物作为潜在的预防策略.
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