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Mochizuki-Kashio M, Otsuki N, Fujiki K, Abdelhamd S, Kurre P, Grompe M, Iwama A, Saito K, Nakamura-Ishizu A. Replication stress increases mitochondrial metabolism and mitophagy in FANCD2 deficient fetal liver hematopoietic stem cells. Front Oncol 2023; 13:1108430. [PMID: 37007148 PMCID: PMC10061350 DOI: 10.3389/fonc.2023.1108430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 01/30/2023] [Indexed: 03/09/2023] Open
Abstract
Fanconi Anemia (FA) is an inherited bone marrow (BM) failure disorder commonly diagnosed during school age. However, in murine models, disrupted function of FA genes leads to a much earlier decline in fetal liver hematopoietic stem cell (FL HSC) number that is associated with increased replication stress (RS). Recent reports have shown mitochondrial metabolism and clearance are essential for long-term BM HSC function. Intriguingly, impaired mitophagy has been reported in FA cells. We hypothesized that RS in FL HSC impacts mitochondrial metabolism to investigate fetal FA pathophysiology. Results show that experimentally induced RS in adult murine BM HSCs evoked a significant increase in mitochondrial metabolism and mitophagy. Reflecting the physiological RS during development in FA, increase mitochondria metabolism and mitophagy were observed in FANCD2-deficient FL HSCs, whereas BM HSCs from adult FANCD2-deficient mice exhibited a significant decrease in mitophagy. These data suggest that RS activates mitochondrial metabolism and mitophagy in HSC.
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Affiliation(s)
- Makiko Mochizuki-Kashio
- Department of Mieroscopic and Developmental Anatomy, Tokyo Women's Medical University, Tokyo, Japan
| | - Noriko Otsuki
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan
| | - Kota Fujiki
- Department of Hygiene and Fublic Health, Tokyo Women's Medical University, Tokyo, Japan
| | - Sherif Abdelhamd
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Peter Kurre
- Children's Hospital of Philadelphia, Comprehensive Bone Marrow Failure Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Markus Grompe
- Papé Family Pediatric Research Institute, Oregon Stem Cell Center, Oregon Health & Science University, Portland, OR, United States
| | - Atsushi Iwama
- Division of Stem Cell and Molecular Medicine, Center for Stem Cell Biology and Regenerative Medicine, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Kayoko Saito
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan
| | - Ayako Nakamura-Ishizu
- Department of Mieroscopic and Developmental Anatomy, Tokyo Women's Medical University, Tokyo, Japan
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