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Protective Effects of Controlled Mechanical Loading of Bone in C57BL6/J Mice Subject to Disuse.


ABSTRACT: Prolonged reduction in weightbearing causes bone loss. Disuse of bone is associated with recovery from common musculoskeletal injury and trauma, bed rest resulting from various medical conditions, and spaceflight. The hindlimb-suspension rodent model is popular for simulating unloading and disuse. We hypothesized that controlled mechanical loading of the tibia would protect against bone loss occurring from concurrent disuse. Additionally, we hypothesized that areas of high mechanical peak strains (midshaft) would provide more protection than areas of lower strain (distal shaft). Adult C57BL6/J mice were suspended for 3?weeks, with one limb subjected to tibial compression four times per week. ?CT imaging was completed at days 0, 11, and 21, in addition to serum analysis. Significant bone loss caused by hindlimb suspension was detected in trabecular bone by day 11 and worsened by day 21 (p?

SUBMITTER: DeLong A 

PROVIDER: S-EPMC7059829 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Protective Effects of Controlled Mechanical Loading of Bone in C57BL6/J Mice Subject to Disuse.

DeLong Alex A   Friedman Michael A MA   Tucker Scott M SM   Krause Andrew R AR   Kunselman Allen A   Donahue Henry J HJ   Lewis Gregory S GS  

JBMR plus 20191227 3


Prolonged reduction in weightbearing causes bone loss. Disuse of bone is associated with recovery from common musculoskeletal injury and trauma, bed rest resulting from various medical conditions, and spaceflight. The hindlimb-suspension rodent model is popular for simulating unloading and disuse. We hypothesized that controlled mechanical loading of the tibia would protect against bone loss occurring from concurrent disuse. Additionally, we hypothesized that areas of high mechanical peak strain  ...[more]

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