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Monma Y, Shimada Y, Nakayama H, Zang L, Nishimura N, Tanaka T. Aging-associated microstructural deterioration of vertebra in zebrafish. Bone Rep 2019; 11:100215. [PMID: 31388517 PMCID: PMC6676153 DOI: 10.1016/j.bonr.2019.100215] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 06/07/2019] [Accepted: 07/12/2019] [Indexed: 12/11/2022] Open
Abstract
Zebrafish, a small teleost fish, is currently emerging as an animal model of local and systemic aging. In this study, we assessed age-related degenerative changes in the vertebral bone of zebrafish (3–12 month-post-fertilisation [mpf]) using micro-CT scanning. The bone volume (BV) of the trabecular bone in the male and female fish peaked at 6 mpf and reduced with age. In contrast to BV, bone mineral density and tissue volume did not change after 6 mpf, implying that the total mineral volume in the trabecular area remains unchanged, retaining the strength of vertebra. In addition, we performed micro-structural analysis of the trabecular thickness, trabecular number, and star volume of the tissue space and trabeculae, and found that the size of the trabecular bone reduced with age. Furthermore, aged zebrafish (45 mpf) exhibited ectopic ossification inside or outside of their vertebrae. In summary, we analysed bone structural parameters in adult zebrafish vertebra, which are also used in humans, and demonstrated that aged zebrafish have deteriorated microarchitecture (trabecular thickness and number, tissue space star volume and trabecular star volume) with reduction of trabecular bones, similar to that observed during aging in humans. Zebrafish can be utilised as an animal model to understand the pathology of human bone aging, and the discovery of new therapeutic agents against age-related osteoporosis. We analysed bone structural parameters in adult zebrafish vertebrae. Microstructural changes in aged-zebrafish are similar to those in humans. Aged zebrafish exhibited ectopic ossification inside or outside of their vertebrae.
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Key Words
- Aging
- BMC, bone mineral content
- BMD, bone mineral density
- BV, bone volume
- CT, Computed Tomography
- FCV, first caudal vertebra
- Micro CT
- Osteoporosis
- TV, tissue volume
- Tb, trabecular bone
- Tb.N, trabecular number
- Tb.Th, trabecular thickness
- Teleost
- V*m, tissue space star volume
- V*tr, trabecular star volume
- mpf, month-post-fertilisation
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Affiliation(s)
- Yasuyuki Monma
- Department of Systems Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Yasuhito Shimada
- Department of Integrative Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
- Department of Bioinformatics, Mie University Advanced Science Research Promotion Center, Tsu, Mie, Japan
- Mie University Zebrafish Drug Screening Center, Tsu, Mie, Japan
| | - Hiroko Nakayama
- Mie University Zebrafish Drug Screening Center, Tsu, Mie, Japan
- Graduate School of Regional Innovation Studies, Mie University, Tsu, Mie, Japan
| | - Liqing Zang
- Mie University Zebrafish Drug Screening Center, Tsu, Mie, Japan
- Graduate School of Regional Innovation Studies, Mie University, Tsu, Mie, Japan
| | - Norihiro Nishimura
- Mie University Zebrafish Drug Screening Center, Tsu, Mie, Japan
- Graduate School of Regional Innovation Studies, Mie University, Tsu, Mie, Japan
| | - Toshio Tanaka
- Department of Systems Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
- Mie University Zebrafish Drug Screening Center, Tsu, Mie, Japan
- Corresponding author at: Department of Systems Pharmacology, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, Mie, Japan.
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