在脏前代细胞中删除NuRD成分Mta2会导致发育编程的FSGS
bioRxiv : the preprint server for biology
|July 1, 2024
概括
出生时脏数量低会增加慢性脏病 (CKD) 的风险. 通过破坏线粒体新陈代谢和脂质处理,在小鼠中删除Mta2导致脏疾病,突出显示了与人类脏疾病的联系.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 发育生物学 发展生物学
- 线粒体的新陈代谢
背景情况:
- 低脏供给是发展慢性脏病 (CKD) 的重要危险因素.
- 早产婴儿和患有先天性异常的儿童的生存率增加,有助于脏相关疾病的流行率上升.
- 核细胞重塑和脱乙酶 (NuRD) 复合体在基因调节中起着至关重要的作用.
研究的目的:
- 调查Mta2的作用,这是NuRD复合物的组成部分,在发育和CKD的发展中.
- 探索改变的染色质重塑对线粒体功能和脂质代谢在低子数的背景下的影响.
- 检查这些发现在人类病中的相关性.
主要方法:
- 通过在原细胞中Mta2删除,创建具有先天低脏数量的小鼠模型.
- 在不同时间点评估功能 (白血病) 和病理 (FSGS,纤维化).
- 分析线粒体代谢,脂质积累和与脂肪酸氧化和氧化酸化相关的基因表达.
- 对人类脏组织样本的检查.
主要成果:
- 在小鼠中,Mta2的缺失导致了白色素尿,焦点细分结核硬化 (FSGS) 和渐进性纤维化.
- 改变线粒体新陈代谢和中性脂质积累在产后的质细胞中被观察到.
- 发现NuRD复合物与Zbtb7a/7b结合,可以调节关键代谢基因.
- 人类脏组织显示了线粒体脂代谢受损的证据,并在FSGS和CKD中改变了ZBTB7A/7B的表达.
结论:
- 由Mta2 / NuRD复合功能影响的先天性低脏数量,有助于脏疾病的发展.
- 被破坏的线粒体脂质代谢和受损的氧化酸化是关键机制,将低脏供给与CKD联系起来.
- 这些发现表明,在产后生长过程中代谢适应性受损会使脏损伤在脏数量较少的个体中恶化.
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