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Hiraoka H, Nakano T, Kuwana S, Fukuzawa M, Hirano Y, Ueda M, Haraguchi T, Hiraoka Y. Intracellular ATP levels influence cell fates in Dictyostelium discoideum differentiation. Genes Cells 2020; 25:312-326. [PMID: 32125743 PMCID: PMC7318147 DOI: 10.1111/gtc.12763] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/27/2020] [Accepted: 02/27/2020] [Indexed: 12/28/2022]
Abstract
Multicellular organisms contain various differentiated cells. Fate determination of these cells remains a fundamental issue. The cellular slime mold Dictyostelium discoideum is a useful model organism for studying differentiation; it proliferates as single cells in nutrient-rich conditions, which aggregate into a multicellular body upon starvation, subsequently differentiating into stalk cells or spores. The fates of these cells can be predicted in the vegetative phase: Cells expressing higher and lower levels of omt12 differentiate into stalk cells and spores, respectively. However, omt12 is merely a marker gene and changes in its expression do not influence the cell fate, and determinant factors remain unknown. In this study, we analyzed cell fate determinants in the stalk-destined and spore-destined cells that were sorted based on omt12 expression. Luciferase assay demonstrated higher levels of intracellular ATP in the stalk-destined cells than in the spore-destined cells. Live-cell observation during development using ATP sensor probes revealed that cells with higher ATP levels differentiated into stalk cells. Furthermore, reducing the ATP level by treating with an inhibitor of ATP production changed the differentiation fates of the stalk-destined cells to spores. These results suggest that intracellular ATP levels influence cell fates in D. discoideum differentiation.
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Affiliation(s)
- Haruka Hiraoka
- Graduate School of Frontier Biosciences, Osaka University, Suita, Japan
| | - Tadashi Nakano
- Institute for Datability Science, Osaka University, Suita, Japan
| | - Satoshi Kuwana
- The United Graduate School of Agricultural Science, Iwate University, Morioka, Japan
| | - Masashi Fukuzawa
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Japan
| | - Yasuhiro Hirano
- Graduate School of Frontier Biosciences, Osaka University, Suita, Japan
| | - Masahiro Ueda
- Graduate School of Frontier Biosciences, Osaka University, Suita, Japan.,Center for Biosystems Dynamics Research (BDR), RIKEN, Suita, Japan
| | - Tokuko Haraguchi
- Graduate School of Frontier Biosciences, Osaka University, Suita, Japan.,Advanced ICT Research Institute Kobe, National Institute of Information and Communications Technology, Kobe, Japan
| | - Yasushi Hiraoka
- Graduate School of Frontier Biosciences, Osaka University, Suita, Japan.,Advanced ICT Research Institute Kobe, National Institute of Information and Communications Technology, Kobe, Japan
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