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The balance of hematopoietic stem cell (HSC) self-renewal and differentiation is critical for a healthy blood supply; imbalances underlie hematological diseases. The importance of HSCs and their progenitors have led to their extensive characterization at genomic and transcriptomic levels. However, the proteomics of hematopoiesis remains incompletely understood. Here we report a proteomics resource from mass spectrometry of mouse young adult and old adult mouse HSCs, multipotent progenitors and oligopotent progenitors; 12 cell types in total. We validated differential protein levels, including confirmation that Dnmt3a protein levels are undetected in young adult mouse HSCs until forced into cycle. Additionally, through integrating proteomics and RNA-sequencing datasets, we identified a subset of genes with apparent post-transcriptional repression in young adult mouse HSCs. In summary, we report proteomic coverage of young and old mouse HSCs and progenitors, with broader implications for understanding mechanisms for stem cell maintenance, niche interactions and fate determination.

Original publication

DOI

10.7554/elife.62210

Type

Journal article

Journal

eLife

Publication Date

25/11/2020

Volume

9

Addresses

Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, United States.

Keywords

Hematopoietic Stem Cells, Animals, Mice, Inbred C57BL, Mice, Proteome, Proteomics, Gene Expression Regulation, RNA Processing, Post-Transcriptional, Aging