A mitochondrial NADPH-cholesterol axis regulates extracellular vesicle biogenesis to support hematopoietic stem cell fate

Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved..

Mitochondrial fatty acid oxidation (FAO) is essential for hematopoietic stem cell (HSC) self-renewal; however, the mechanism by which mitochondrial metabolism controls HSC fate remains unknown. Here, we show that within the hematopoietic lineage, HSCs have the largest mitochondrial NADPH pools, which are required for proper HSC cell fate and homeostasis. Bioinformatic analysis of the HSC transcriptome, biochemical assays, and genetic inactivation of FAO all indicate that FAO-generated NADPH fuels cholesterol synthesis in HSCs. Interference with FAO disturbs the segregation of mitochondrial NADPH toward corresponding daughter cells upon single HSC division. Importantly, we have found that the FAO-NADPH-cholesterol axis drives extracellular vesicle (EV) biogenesis and release in HSCs, while inhibition of EV signaling impairs HSC self-renewal. These data reveal the existence of a mitochondrial NADPH-cholesterol axis for EV biogenesis that is required for hematopoietic homeostasis and highlight the non-stochastic nature of HSC fate determination.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:31

Enthalten in:

Cell stem cell - 31(2024), 3 vom: 07. März, Seite 359-377.e10

Sprache:

Englisch

Beteiligte Personen:

Bonora, Massimo [VerfasserIn]
Morganti, Claudia [VerfasserIn]
van Gastel, Nick [VerfasserIn]
Ito, Kyoko [VerfasserIn]
Calura, Enrica [VerfasserIn]
Zanolla, Ilaria [VerfasserIn]
Ferroni, Letizia [VerfasserIn]
Zhang, Yang [VerfasserIn]
Jung, Yookyung [VerfasserIn]
Sales, Gabriele [VerfasserIn]
Martini, Paolo [VerfasserIn]
Nakamura, Takahisa [VerfasserIn]
Lasorsa, Francesco Massimo [VerfasserIn]
Finkel, Toren [VerfasserIn]
Lin, Charles P [VerfasserIn]
Zavan, Barbara [VerfasserIn]
Pinton, Paolo [VerfasserIn]
Georgakoudi, Irene [VerfasserIn]
Romualdi, Chiara [VerfasserIn]
Scadden, David T [VerfasserIn]
Ito, Keisuke [VerfasserIn]

Links:

Volltext

Themen:

53-59-8
Cholesterol
Exosomes
Extracellular vesicles
Fate determination
Fatty acid oxidation
HSC self-renewal
Hematopoietic stem cell
Journal Article
Metabolism
Mitochondria
NADP
NADPH
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Anmerkungen:

Date Completed 11.03.2024

Date Revised 23.03.2024

published: Print

Citation Status MEDLINE

doi:

10.1016/j.stem.2024.02.004

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM369479106