Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA.
Department of Genetics, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA; The Edison Family Center for Genome Sciences and Systems Biology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA.
Immunity. 2021 Jul 13;54(7):1417-1432.e7. doi: 10.1016/j.immuni.2021.04.015. Epub 2021 May 17.
The transcriptional repressor ZEB2 regulates development of many cell fates among somatic, neural, and hematopoietic lineages, but the basis for its requirement in these diverse lineages is unclear. Here, we identified a 400-basepair (bp) region located 165 kilobases (kb) upstream of the Zeb2 transcriptional start site (TSS) that binds the E proteins at several E-box motifs and was active in hematopoietic lineages. Germline deletion of this 400-bp region (Zeb2mice) specifically prevented Zeb2 expression in hematopoietic stem cell (HSC)-derived lineages. Zeb2 mice lacked development of plasmacytoid dendritic cells (pDCs), monocytes, and B cells. All macrophages in Zeb2 mice were exclusively of embryonic origin. Using single-cell chromatin profiling, we identified a second Zeb2 enhancer located at +164-kb that was selectively active in embryonically derived lineages, but not HSC-derived ones. Thus, Zeb2 expression in adult, but not embryonic, hematopoiesis is selectively controlled by the -165-kb Zeb2 enhancer.
转录抑制剂 ZEB2 调节体细胞、神经和造血谱系中许多细胞命运的发育,但它在这些不同谱系中所需的基础尚不清楚。在这里,我们确定了位于 Zeb2 转录起始位点(TSS)上游 165 千碱基(kb)处的 400 碱基(bp)区域,该区域与几个 E 盒基序结合 E 蛋白,并在造血谱系中具有活性。该 400-bp 区域(Zeb2 小鼠)的种系缺失特异性地阻止了造血干细胞(HSC)衍生谱系中的 Zeb2 表达。Zeb2 小鼠缺乏浆细胞样树突状细胞(pDC)、单核细胞和 B 细胞的发育。Zeb2 小鼠的所有巨噬细胞均仅来自胚胎。使用单细胞染色质分析,我们鉴定了位于 +164-kb 的第二个 Zeb2 增强子,该增强子仅在胚胎衍生的谱系中选择性地活跃,但在 HSC 衍生的谱系中不活跃。因此,Zeb2 在成年而不是胚胎造血中的表达是由-165-kb 的 Zeb2 增强子选择性控制的。
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