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识别新的衰老调节化合物和量化细胞衰老,使用新的计算框架来评估转录年龄.
bioRxiv : the preprint server for biology
|July 18, 2023
概括
研究人员开发了RNAge,这是一个转录分数来测量细胞年龄. 这种工具有助于识别可以修改人类多能干细胞 (hPSC) 衍生细胞衰老的化合物,推动健康寿命延长的研究.
科学领域:
- 干细胞生物学 干细胞生物学
- 衰老研究研究 衰老研究
- 文字转录学 (Transcriptomics) 是一个学科.
背景情况:
- 人类多能干细胞 (hPSCs) 可以接触到多种细胞类型,但通常会产生胎儿阶段的身份.
- 加快hPSC衍生系的衰老和了解与年龄相关的因素对于延长人类健康寿命至关重要.
- 开发可靠的方法来得分细胞年龄对于评估改变年龄的策略至关重要.
研究的目的:
- 建立一个转录分数 (RNAge) 来量化各种人体组织和细胞类型的细胞年龄.
- 通过独立的数据集和细胞系验证RNAge的准确性和特异性.
- 利用RNAge识别调节细胞衰老的新型化合物,包括诱发衰老和再生剂.
主要方法:
- 开发和验证RNAge转录分数使用RNA-seq数据从年轻与老初级纤维细胞和人类大脑组织.
- 在各种重编程和衰老诱导条件下,评估hPSC衍生细胞,包括诱导神经元 (iN) 中的RNAge.
- 使用RNAge作为探针来识别潜在的改变年龄的化合物,对LINCS L1000数据集进行in-silico选.
主要成果:
- RNAge证明了细胞和组织的特异性,并准确地反映了与年龄相关的转录变化.
- 将老化纤维细胞重新编程为iPSCs重置RNAge,而直接重新编程为iNS保持了衰老特征.
- 确定了几种新型诱导衰老和再生化合物,RNAge与明显的细胞衰老特征相关.
结论:
- RNAge提供了一种简单而有效的工具,用于评分细胞年龄,并评估hPSC衍生的血统中的年龄修饰策略.
- 这些已识别的化合物扩大了操纵细胞年龄的可用工具包,这对再生医学和寿命研究产生了影响.
- 这项研究促进了对细胞衰老机制的理解,并为针对与年龄有关的疾病的治疗干预提供了新的途径.
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