PMID- 34507353 OWN - NLM STAT- MEDLINE DCOM- 20211101 LR - 20220401 IS - 2473-9537 (Electronic) IS - 2473-9529 (Print) IS - 2473-9529 (Linking) VI - 5 IP - 20 DP - 2021 Oct 26 TI - Exogenous mitochondrial transfer and endogenous mitochondrial fission facilitate AML resistance to OxPhos inhibition. PG - 4233-4255 LID - 10.1182/bloodadvances.2020003661 [doi] AB - Acute myeloid leukemia (AML) cells are highly dependent on oxidative phosphorylation (OxPhos) for survival, and they continually adapt to fluctuations in nutrient and oxygen availability in the bone marrow (BM) microenvironment. We investigated how the BM microenvironment affects the response to OxPhos inhibition in AML by using a novel complex I OxPhos inhibitor, IACS-010759. Cellular adhesion, growth, and apoptosis assays, along with measurements of expression of mitochondrial DNA and generation of mitochondrial reactive oxygen species indicated that direct interactions with BM stromal cells triggered compensatory activation of mitochondrial respiration and resistance to OxPhos inhibition in AML cells. Mechanistically, inhibition of OxPhos induced transfer of mitochondria derived from mesenchymal stem cells (MSCs) to AML cells via tunneling nanotubes under direct-contact coculture conditions. Inhibition of OxPhos also induced mitochondrial fission and increased functional mitochondria and mitophagy in AML cells. Mitochondrial fission is known to enhance cell migration, so we used electron microscopy to observe mitochondrial transport to the leading edge of protrusions of AML cells migrating toward MSCs. We further demonstrated that cytarabine, a commonly used antileukemia agent, increased mitochondrial transfer of MSCs to AML cells triggered by OxPhos inhibition. Our findings indicate an important role of exogenous mitochondrial trafficking from BM stromal cells to AML cells as well as endogenous mitochondrial fission and mitophagy in the compensatory adaptation of leukemia cells to energetic stress in the BM microenvironment. CI - (c) 2021 by The American Society of Hematology. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0), permitting only noncommercial, nonderivative use with attribution. All other rights reserved. FAU - Saito, Kaori AU - Saito K AD - Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan. FAU - Zhang, Qi AU - Zhang Q AD - Section of Leukemia Biology Research, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. FAU - Yang, Haeun AU - Yang H AD - Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan. FAU - Yamatani, Kotoko AU - Yamatani K AUID- ORCID: 0000-0002-0162-1162 AD - Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan. AD - Research Fellow of the Japan Society for the Promotion of Science, Tokyo, Japan. FAU - Ai, Tomohiko AU - Ai T AUID- ORCID: 0000-0003-0376-0227 AD - Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan. FAU - Ruvolo, Vivian AU - Ruvolo V AUID- ORCID: 0000-0003-4363-7258 AD - Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. FAU - Baran, Natalia AU - Baran N AUID- ORCID: 0000-0003-0618-4798 AD - Section of Leukemia Biology Research, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. FAU - Cai, Tianyu AU - Cai T AD - Section of Leukemia Biology Research, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. FAU - Ma, Helen AU - Ma H AD - Section of Leukemia Biology Research, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. FAU - Jacamo, Rodrigo AU - Jacamo R AD - Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. FAU - Kuruvilla, Vinitha AU - Kuruvilla V AD - Section of Leukemia Biology Research, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. FAU - Imoto, Junichi AU - Imoto J AD - Center for Information Biology, National Institute of Genetics, Shizuoka, Japan. FAU - Kinjo, Sonoko AU - Kinjo S AD - Center for Information Biology, National Institute of Genetics, Shizuoka, Japan. FAU - Ikeo, Kazuho AU - Ikeo K AD - Center for Information Biology, National Institute of Genetics, Shizuoka, Japan. FAU - Moriya, Kaori AU - Moriya K AD - Laboratory of Morphology and Image Analysis, and. FAU - Suzuki, Koya AU - Suzuki K AD - Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan. AD - Research Institute for Diseases of Old Age, Juntendo University Graduate School of Medicine, Tokyo, Japan. FAU - Miida, Takashi AU - Miida T AUID- ORCID: 0000-0002-4294-8030 AD - Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan. FAU - Kim, Yong-Mi AU - Kim YM AUID- ORCID: 0000-0003-3793-6438 AD - Pediatrics and Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA. FAU - Vellano, Christopher P AU - Vellano CP AD - TRACTION, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX; and. FAU - Andreeff, Michael AU - Andreeff M AUID- ORCID: 0000-0002-1144-1958 AD - Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. FAU - Marszalek, Joseph R AU - Marszalek JR AD - TRACTION, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX; and. FAU - Tabe, Yoko AU - Tabe Y AUID- ORCID: 0000-0002-3734-0346 AD - Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan. AD - Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. AD - Department of Next Generation Hematology Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan. FAU - Konopleva, Marina AU - Konopleva M AUID- ORCID: 0000-0002-9347-2212 AD - Section of Leukemia Biology Research, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX. LA - eng GR - P50 CA100632/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Blood Adv JT - Blood advances JID - 101698425 RN - 0 (IACS-010759) RN - 0 (Oxadiazoles) RN - 0 (Piperidines) SB - IM MH - Humans MH - *Leukemia, Myeloid, Acute/drug therapy/metabolism MH - Mitochondria/metabolism MH - Mitochondrial Dynamics MH - Oxadiazoles MH - *Oxidative Phosphorylation MH - Piperidines MH - Tumor Microenvironment PMC - PMC8945617 EDAT- 2021/09/11 06:00 MHDA- 2021/11/03 06:00 PMCR- 2021/10/25 CRDT- 2021/09/10 20:33 PHST- 2020/10/22 00:00 [received] PHST- 2021/06/09 00:00 [accepted] PHST- 2021/09/11 06:00 [pubmed] PHST- 2021/11/03 06:00 [medline] PHST- 2021/09/10 20:33 [entrez] PHST- 2021/10/25 00:00 [pmc-release] AID - S2473-9529(21)00537-1 [pii] AID - 2021/ADV2020003661 [pii] AID - 10.1182/bloodadvances.2020003661 [doi] PST - ppublish SO - Blood Adv. 2021 Oct 26;5(20):4233-4255. doi: 10.1182/bloodadvances.2020003661.