SATB1 Chromatin Loops Regulate Megakaryocyte/Erythroid Progenitor Expansion by Facilitating HSP70 and GATA1 Induction
Abstract
Diamond Blackfan anemia (DBA) is an inherited bone marrow failure syndrome associated with severe anemia, congenital malformations, and an increased risk of developing cancer. The chromatin-binding special AT-rich sequence-binding protein-1 (SATB1) is downregulated in megakaryocyte/erythroid progenitors (MEPs) in patients and cell models of DBA, leading to a reduction in MEP expansion. Here we demonstrate that SATB1 expression is required for the upregulation of the critical erythroid factors heat shock protein 70 (HSP70) and GATA1 which accompanies MEP differentiation. SATB1 binding to specific sites surrounding the HSP70 genes promotes chromatin loops that are required for the induction of HSP70, which, in turn, promotes GATA1 induction. This demonstrates that SATB1, although gradually downregulated during myelopoiesis, maintains a biological function in early myeloid progenitors.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 29, 2023
- Source ID
- 10.1093/stmcls/sxad025
Entities
People
- Alma-martina Cepika
- Ascia Eskin
- Bert Glader
- Ethan P. Wentworth
- Hee-don Chae
- Kathleen M. Sakamoto
- Mallika Saxena
- Maria Grazia Roncarolo
- Mark Wilkes
- Stanley F. Nelson
- Vanessa Scanlon
- Zugen Chen
Organizations
- National Institutes of Health
- Stanford University
- United States Department of Defense
- Yale University