Novel differential calcium regulation of hematopoietic stem and progenitor cells under physiological low oxygen conditions
Title
Novel differential calcium regulation of hematopoietic stem and progenitor cells under physiological low oxygen conditions
Creator
Paige Dausinas Ni
Melissa Hartman
Jacob Slack
Christopher Basile
Sheng Liu
Jun Wan
Heather A O'Leary
Publisher
Journal of Cell Physiology
Date
2023 Apr 13
Description
Low oxygen bone marrow (BM) niches (~1%-4% low O2 ) provide critical signals for hematopoietic stem/progenitor cells (HSC/HSPCs). Our presented data are the first to investigate live, sorted HSC/HSPCs in their native low O2 conditions. Transcriptional and proteomic analysis uncovered differential Ca2+ regulation that correlated with overlapping phenotypic populations consisting of robust increases of cytosolic and mitochondrial Ca2+ , ABC transporter (ABCG2) expression and sodium/hydrogen exchanger (NHE1) expression in live, HSC/HSPCs remaining in constant low O2. We identified a novel Ca2+ high population in HSPCs predominantly detected in low O2 that displayed enhanced frequency of phenotypic LSK/LSKCD150 in low O2 replating assays compared to Ca2+ low populations. Inhibition of the Ca2+ regulator NHE1 (Cariporide) resulted in attenuation of both the low O2 induced Ca2+ high population and subsequent enhanced maintenance of phenotypic LSK and LSKCD150 during low O2 replating. These data reveal multiple levels of differential Ca2+ regulation in low O2 resulting in phenotypic, signaling, and functional consequences in HSC/HSPCs.
Source
doi: 10.1002/jcp.30942. Online ahead of print.
Language
English
Citation
Paige Dausinas Ni et al., “Novel differential calcium regulation of hematopoietic stem and progenitor cells under physiological low oxygen conditions,” NEOMED Bibliography Database, accessed April 26, 2024, https://neomed.omeka.net/items/show/12297.