MYC Promotes Bone Marrow Stem Cell Dysfunction in Fanconi Anemia.
CXCR4
DNA damage
Fanconi anemia
MYC
bone marrow failure
genotoxic stress
hematopoietic stem cells
p53
physiological stress
single-cell RNA sequencing
Journal
Cell stem cell
ISSN: 1875-9777
Titre abrégé: Cell Stem Cell
Pays: United States
ID NLM: 101311472
Informations de publication
Date de publication:
07 01 2021
07 01 2021
Historique:
received:
21
02
2020
revised:
11
05
2020
accepted:
08
09
2020
pubmed:
1
10
2020
medline:
20
5
2021
entrez:
30
9
2020
Statut:
ppublish
Résumé
Bone marrow failure (BMF) in Fanconi anemia (FA) patients results from dysfunctional hematopoietic stem and progenitor cells (HSPCs). To identify determinants of BMF, we performed single-cell transcriptome profiling of primary HSPCs from FA patients. In addition to overexpression of p53 and TGF-β pathway genes, we identified high levels of MYC expression. We correspondingly observed coexistence of distinct HSPC subpopulations expressing high levels of TP53 or MYC in FA bone marrow (BM). Inhibiting MYC expression with the BET bromodomain inhibitor (+)-JQ1 reduced the clonogenic potential of FA patient HSPCs but rescued physiological and genotoxic stress in HSPCs from FA mice, showing that MYC promotes proliferation while increasing DNA damage. MYC-high HSPCs showed significant downregulation of cell adhesion genes, consistent with enhanced egress of FA HSPCs from bone marrow to peripheral blood. We speculate that MYC overexpression impairs HSPC function in FA patients and contributes to exhaustion in FA bone marrow.
Identifiants
pubmed: 32997960
pii: S1934-5909(20)30450-1
doi: 10.1016/j.stem.2020.09.004
pmc: PMC7796920
mid: NIHMS1634089
pii:
doi:
Substances chimiques
Transforming Growth Factor beta
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
33-47.e8Subventions
Organisme : NHLBI NIH HHS
ID : P01 HL048546
Pays : United States
Organisme : NHLBI NIH HHS
ID : R01 HL052725
Pays : United States
Commentaires et corrections
Type : CommentIn
Informations de copyright
Copyright © 2020 Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Interests The authors declare no competing interests.