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Title: Reduced bone formation markers, and altered trabecular and cortical bone mineral densities of non-paretic femurs observed in rats with ischemic stroke: A randomized controlled pilot study.
Austin Authors: Borschmann, Karen N;Rewell, Sarah S J;Iuliano, Sandra ;Ghasem-Zadeh, Ali ;Davey, Rachel A;Ho, Heidi;Skeers, Peta N;Bernhardt, Julie;Howells, David W
Affiliation: Endocrinology
Medicine (University of Melbourne)
University of Tasmania, School of Medicine, Faculty of Health, Hobart, Australia
The Florey Institute of Neuroscience and Mental Health
School of Allied Health, La Trobe University, Bundoora, Australia
NHMRC Centre for Research Excellence in Stroke Rehabilitation and Recovery, Melbourne, Australia
Issue Date: 9-Mar-2017
Date: 2017-03-09
Publication information: PLoS One 2017; 12(3): e0172889
Abstract: Immobility and neural damage likely contribute to accelerated bone loss after stroke, and subsequent heightened fracture risk in humans. To investigate the skeletal effect of middle cerebral artery occlusion (MCAo) stroke in rats and examine its utility as a model of human post-stroke bone loss. Twenty 15-week old spontaneously hypertensive male rats were randomized to MCAo or sham surgery controls. Primary outcome: group differences in trabecular bone volume fraction (BV/TV) measured by Micro-CT (10.5 micron istropic voxel size) at the ultra-distal femur of stroke affected left legs at day 28. Neurological impairments (stroke behavior and foot-faults) and physical activity (cage monitoring) were assessed at baseline, and days 1 and 27. Serum bone turnover markers (formation: N-terminal propeptide of type 1 procollagen, PINP; resorption: C-terminal telopeptide of type 1 collagen, CTX) were assessed at baseline, and days 7 and 27. No effect of stroke was observed on BV/TV or physical activity, but PINP decreased by -24.5% (IQR -34.1, -10.5, p = 0.046) at day 27. In controls, cortical bone volume (5.2%, IQR 3.2, 6.9) and total volume (6.4%, IQR 1.2, 7.6) were higher in right legs compared to left legs, but these side-to-side differences were not evident in stroke animals. MCAo may negatively affect bone formation. Further investigation of limb use and physical activity patterns after MCAo is required to determine the utility of this current model as a representation of human post-stroke bone loss.
DOI: 10.1371/journal.pone.0172889
ORCID: 0000-0001-5364-2718
Journal: PLoS One
PubMed URL: 28278253
Type: Journal Article
Appears in Collections:Journal articles

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