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Aido M, Kerschnitzki M, Hoerth R, Checa S, Spevak L, Boskey AL, Fratzl P, Duda GN, Wagermaier W, Willie BM. Effect of in vivo loading on bone composition varies with animal age. Exp Gerontol 2015; 63:48-58. [PMID: 25639943 PMCID: PMC4352172 DOI: 10.1016/j.exger.2015.01.048] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 12/23/2014] [Accepted: 01/28/2015] [Indexed: 01/07/2023]
Abstract
Loading can increase bone mass and size and this response is reduced
with aging. It is unclear, however how loading affects bone mineral and matrix
properties. Fourier Transform Infrared Imaging and high resolution synchrotron
scanning small angle X-ray scattering were used to study how bone’s
microscale and nanoscale compositional properties were altered in the tibial
midshaft of young, adult, and elderly female C57Bl/6J mice after two weeks of
controlled in vivo compressive loading in comparison to
physiological loading. The effect of controlled loading on bone composition
varied with animal age, since it predominantly influenced the bone composition
of elderly mice. Interestingly, controlled loading led to enhanced collagen
maturity in elderly mice. In addition, although the rate of bone formation was
increased by controlled loading based on histomorphometry, the newly formed
tissue had similar material quality to new bone tissue formed during
physiological loading. Similar to previous studies, our data showed that bone
composition was animal and tissue age dependent during physiological loading.
The findings that the new tissue formed in response to controlled loading and
physiological loading had similar bone composition and that controlled loading
enhanced bone composition in elderly mice further supports the use of physical
activity as a noninvasive treatment to enhance bone quality as well as maintain
bone mass in individuals suffering from age-related bone loss.
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Affiliation(s)
- Marta Aido
- Julius Wolff Institute, Charité-Universitätsmedizin Berlin, Germany; Berlin-Brandenburg School for Regenerative Therapies (BSRT), Berlin, Germany
| | - Michael Kerschnitzki
- Berlin-Brandenburg School for Regenerative Therapies (BSRT), Berlin, Germany; Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Rebecca Hoerth
- Berlin-Brandenburg School for Regenerative Therapies (BSRT), Berlin, Germany; Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Sara Checa
- Julius Wolff Institute, Charité-Universitätsmedizin Berlin, Germany
| | | | | | - Peter Fratzl
- Berlin-Brandenburg School for Regenerative Therapies (BSRT), Berlin, Germany; Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Georg N Duda
- Julius Wolff Institute, Charité-Universitätsmedizin Berlin, Germany; Berlin-Brandenburg School for Regenerative Therapies (BSRT), Berlin, Germany; Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Berlin, Germany
| | | | - Bettina M Willie
- Julius Wolff Institute, Charité-Universitätsmedizin Berlin, Germany.
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