Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98101, USA.
Lowy Medical Research Institute, La Jolla, CA 92037, USA; Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA.
Dev Cell. 2022 Mar 28;57(6):820-836.e6. doi: 10.1016/j.devcel.2022.02.018. Epub 2022 Mar 17.
Cis-regulatory elements (CREs) play a critical role in the development and disease-states of all human cell types. In the retina, CREs have been implicated in several inherited disorders. To better characterize human retinal CREs, we performed single-nucleus assay for transposase-accessible chromatin sequencing (snATAC-seq) and single-nucleus RNA sequencing (snRNA-seq) on the developing and adult human retina and on induced pluripotent stem cell (iPSC)-derived retinal organoids. These analyses identified developmentally dynamic, cell-class-specific CREs, enriched transcription-factor-binding motifs, and putative target genes. CREs in the retina and organoids are highly correlated at the single-cell level, and this supports the use of organoids as a model for studying disease-associated CREs. As a proof of concept, we disrupted a disease-associated CRE at 5q14.3, confirming its principal target gene as the miR-9-2 primary transcript and demonstrating its role in neurogenesis and gene regulation in mature glia. This study provides a resource for characterizing human retinal CREs and showcases organoids as a model to study the function of CREs that influence development and disease.
顺式调控元件(CREs)在所有人类细胞类型的发育和疾病状态中起着关键作用。在视网膜中,CREs 与几种遗传性疾病有关。为了更好地描述人类视网膜 CREs,我们对发育中和成人的人类视网膜以及诱导多能干细胞(iPSC)衍生的视网膜类器官进行了转座酶可及染色质测序(snATAC-seq)和单细胞 RNA 测序(snRNA-seq)。这些分析确定了具有发育动态性、细胞类特异性的 CREs,富含转录因子结合基序和潜在的靶基因。视网膜和类器官中的 CREs 在单细胞水平上高度相关,这支持了使用类器官作为研究与疾病相关 CREs 的模型。作为概念验证,我们破坏了 5q14.3 处与疾病相关的 CRE,证实其主要靶基因是 miR-9-2 初级转录本,并证明了其在成熟胶质细胞中的神经发生和基因调控中的作用。这项研究提供了一个用于描述人类视网膜 CREs 的资源,并展示了类器官作为研究影响发育和疾病的 CRE 功能的模型。