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在生命早期,DDIT4L调节线粒体和先天性免疫活动

Christina Michalski^1,2, Claire Cheung^1,2, Ju Hee Oh^1,3

¹British Columbia Children's Hospital Research Institute, Vancouver, British Columbia, Canada.

|February 6, 2024

概括

DDIT4L基因调节线粒体活动和髓状细胞中的先天免疫反应. 这一发现提供了关于胎儿发育期间免疫抑制和对新生儿肺部疾病的潜在保护的见解.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
发展生物学发展生物学

背景情况:

由模式识别受体介导的先天性免疫反应在第三个三个月之前被抑制在低氧的胎儿环境中.
控制这种发育性免疫调节的分子机制在很大程度上是未知的.

研究的目的:

研究调节人类发育中的胎儿内在免疫反应的机制.
确定新生儿骨髓状细胞中代谢压力,生物能学和免疫活动的关键调节者.

主要方法:

在初级新生儿单细胞上进行了全基因组转录和功能代谢实验.
使用了过度表达DDIT4L的基因工程单细胞U937细胞.
对新生儿粒细胞和早产婴儿的肺巨细胞进行基因表达分析.

主要成果:

鉴定了DDIT4L基因作为mTOR的负调节者,将代谢压力与先天免疫活性联系起来.
在U937细胞中DDIT4L的过度表达改变了线粒体动力学,抑制了线粒体活动,并削弱了脂多糖 (LPS) 诱导的细胞因子反应.
发现单细胞线粒体功能在更早的孕期更受限制,反映了DDIT4L过度表达的表型.
在产后早期的新生儿骨髓状细胞中观察到DDIT4L的升级,这表明它在缓解炎症相关的新生儿慢性肺病中的作用.

结论:

DDIT4L在调节髓状细胞内的线粒体活动中起着至关重要的作用.
这项研究提供了第一个直接证据,证明DDIT4L在发育过程中抑制髓状细胞内天生的免疫活动的功能.
通过调节炎症反应,DDIT4L可能提供针对新生儿肺部疾病的保护机制.

关键词:

生物能源学生物能源学细胞免疫反应的细胞免疫反应.免疫学免疫学免疫学单细胞 (Monocytes) 是一种单细胞.

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