Biomimetic bone mechanotransduction modeling in neonatal rat femur organ cultures: structural verification of proof of concept |
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Authors: | Marnie M Saunders Linda A Simmerman Gretchen L Reed Neil A Sharkey Amanda F Taylor |
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Institution: | (1) Department of Bone and Joint Disease, National Center for Geriatrics and Gerontology (NCGG), 35 Gengo, Morioka, Obu Aichi, 474-8511, Japan |
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Abstract: | The goal of this work was to develop and validate a whole bone organ culture model to be utilized in biomimetic mechanotransduction
research. Femurs harvested from 2-day-old neonatal rat pups were maintained in culture for 1 week post-harvest and assessed
for growth and viability. For stimulation studies, femurs were physiologically stimulated for 350 cycles 24 h post-harvest
then maintained in culture for 1 week at which time structural tests were conducted. Comparing 1 and 8 days in culture, bones
grew significantly in size over the 7-day culture period. In addition, histology supported adequate diffusion and organ viability
at 2 weeks in culture. For stimulation studies, 350 cycles of physiologic loading 24 h post-harvest resulted in increased
bone strength over the 7-day culture period. In this work, structural proof of concept was established for the use of whole
bone organ cultures as mechanotransduction models. Specifically, this work established that these cultures grow and remain
viable in culture, are adequately nourished via diffusion and are capable of responding to a brief bout of mechanical stimulation
with an increase in strength. |
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