Asymmetrically Segregated Mitochondria Provide Cellular Memory of Hematopoietic Stem Cell Replicative History and Drive HSC Attrition.
Journal
Cell stem cell
ISSN: 1875-9777
Titre abrégé: Cell Stem Cell
Pays: United States
ID NLM: 101311472
Informations de publication
Date de publication:
05 03 2020
05 03 2020
Historique:
received:
15
09
2019
revised:
29
10
2019
accepted:
23
01
2020
pubmed:
16
2
2020
medline:
28
4
2021
entrez:
16
2
2020
Statut:
ppublish
Résumé
The metabolic requirements of hematopoietic stem cells (HSCs) change with their cell cycle activity. However, the underlying role of mitochondria remains ill-defined. Here we found that, after mitochondrial activation with replication, HSCs irreversibly remodel the mitochondrial network and that this network is not repaired after HSC re-entry into quiescence, contrary to hematopoietic progenitors. HSCs keep and accumulate dysfunctional mitochondria through asymmetric segregation during active division. Mechanistically, mitochondria aggregate and depolarize after stress because of loss of activity of the mitochondrial fission regulator Drp1 onto mitochondria. Genetic and pharmacological studies indicate that inactivation of Drp1 causes loss of HSC regenerative potential while maintaining HSC quiescence. Molecularly, HSCs carrying dysfunctional mitochondria can re-enter quiescence but fail to synchronize the transcriptional control of core cell cycle and metabolic components in subsequent division. Thus, loss of fidelity of mitochondrial morphology and segregation is one type of HSC divisional memory and drives HSC attrition.
Identifiants
pubmed: 32059807
pii: S1934-5909(20)30016-3
doi: 10.1016/j.stem.2020.01.016
pmc: PMC7212526
mid: NIHMS1568883
pii:
doi:
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
420-430.e6Subventions
Organisme : NHLBI NIH HHS
ID : R01 HL122661
Pays : United States
Organisme : NIH HHS
ID : S10 OD023410
Pays : United States
Organisme : NIAMS NIH HHS
ID : P30 AR070549
Pays : United States
Organisme : NIDDK NIH HHS
ID : R01 DK102890
Pays : United States
Organisme : NIAID NIH HHS
ID : R21 AI135595
Pays : United States
Organisme : NIGMS NIH HHS
ID : R01 GM130695
Pays : United States
Organisme : NHLBI NIH HHS
ID : R01 HL090676
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.
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