Cited by 33Spaceflight effects on biologyBone health and osteoporosis researchBone Metabolism and Diseases

Effects of Spaceflight on Bone Microarchitecture in the Axial and Appendicular Skeleton in Growing Ovariectomized Rats

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Keune, Jessica A., Branscum, Adam J., Iwaniec, Urszula T., Turner, Russell T.·2015·Scientific Reports

Abstract

This study investigated the effects of a 14-day spaceflight on bone mass, density and microarchitecture in weight bearing (femur and humerus) and non-weight bearing (2 nd lumbar vertebra and calvarium) bones in the context of ovarian hormone insufficiency. 12-week-old Fisher 344 rats were ovariectomized 2 weeks before flight and randomized into one of three groups: 1) baseline (n = 6), 2) ground control (n = 12) or 3) spaceflight (n = 12). Additional ground-based ovary-intact rats provided age-matched reference values at baseline (n = 8) and landing (n = 10). Ovariectomy resulted in bone- and bone compartment-specific deficits in cancellous bone volume fraction. Spaceflight resulted in lower cortical bone accrual in the femur but had no effect on cortical bone in the humerus or calvarium. Cancellous bone volume fraction was lower in flight animals compared to ground control animals in lumbar vertebra and distal femur metaphysis and epiphysis; significant differences were not detected in the distal humerus. Bone loss (compared to baseline controls) in the femur metaphysis was associated with lower trabecular number, whereas trabecular thickness and number were lower in the epiphysis. In summary, the effect of spaceflight on bone microarchitecture in ovariectomized rats was bone-and bone compartment-specific but not strictly related to weight bearing.

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  1. Morey E., Turner R. & Baylink D. The effect of spaceflight on selected bone parameters. (Neuka Press, 1979).

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Authors
Keune, J. A., Branscum, A. J., Iwaniec, U. T., & Turner, R. T.
Affiliations
Oregon State University (US)
Corresponding author
Turner, Russell T.
Venue
Scientific Reports
Published
2015-12-22
Volume
5
Issue
1
Pages
18671-18671
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2400856411
Cited by
33
References
55
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 6 · 2021: 3 · 2020: 4 · 2019: 5 · 2018: 5 · 2017: 2 · 2016: 1
FWCI
1.96
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation
  • National Aeronautics and Space Administration (NNX12AL24G)
Topics
  • Health Sciences › Medicine › Physiology › Spaceflight effects on biology
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
Keywords
spaceflight, bone microarchitecture, ovariectomy, bone loss, trabecular bone, axial skeleton, appendicular skeleton, weight-bearing bones, lumbar vertebrae, calvarium, femur, humerus
MeSH terms
Animals, Bone and Bones, Female, Organ Size, Ovariectomy, Ovary, Rats, Inbred F344, Space Flight, Bone Density, Diaphyses, Growth and Development, X-Ray Microtomography

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