人类生命的延长终端阶段会在皮肤转录组中诱导生存反应
bioRxiv : the preprint server for biology
|June 9, 2023
概括
人类死亡触发了皮肤中的细胞生存途径,特别是在缓慢死亡后. 皮肤纤维细胞表现出弹性,而皮肤则表现出弹性.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 细胞生物学 细胞生物学
背景情况:
- 人类的死亡是一个复杂的生物事件.
- 死后细胞存活率因死亡过程而异.
- 了解死后细胞适应对于解释生物数据至关重要.
研究的目的:
- 为了研究终端阶段持续时间对人体皮肤死后基因表达的影响.
- 识别特定的细胞通路和细胞类型,参与死后生存反应.
- 了解死亡作为生物变量对组织转录组学的影响.
主要方法:
- 利用了来自基因型-组织表达 (GTEx) 数据库的701个人类皮肤样本的RNA测序数据.
- 分析基因表达模式与生命末期阶段 (缓慢死亡) 的持续时间相关.
- 采用单核RNA测序来确定死后皮肤内的弹性细胞区.
主要成果:
- 较长的终端阶段 (缓慢死亡) 与在死后皮肤中增强的生存途径诱导相关,特别是PI3K-Akt信号传递.
- 上调的胚胎发育转录因子 (FOXO1,FOXO3,ATF4,CEBPD) 与这种生存反应有关.
- 皮肤纤维细胞通过PI3K-Akt信号诱导表现出最强的弹性;皮肤内皮细胞表现出血管性通路激活.
- 相反,对皮肤功能至关重要的途径,如黑色素发生和细胞外基质代谢,被下调.
结论:
- 死亡是一种影响组织转录的生物变量.
- 缓慢死亡促进皮肤中的细胞生存机制.
- 这些发现对解释已故个体和移植组织的数据有影响.
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