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Recombinant IGF-1 Induces Sex-Specific Changes in Bone Composition and Remodeling in Adult Mice with Deficiency. | LitMetric

Recombinant IGF-1 Induces Sex-Specific Changes in Bone Composition and Remodeling in Adult Mice with Deficiency.

Int J Mol Sci

Departamento de Anatomía Humana, Medicina Legal e Historia de la Ciencia, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, 29071 Málaga, Spain.

Published: April 2021

AI Article Synopsis

Article Abstract

Deficiency of pregnancy-associated plasma protein-A2 (PAPP-A2), an IGF-1 availability regulator, causes postnatal growth failure and dysregulation of bone size and density. The present study aimed to determine the effects of recombinant murine IGF-1 (rmIGF-1) on bone composition and remodeling in constitutive knock-out (ko/ko) mice. To address this challenge, X-ray diffraction (XRD), attenuated total reflection-fourier transform infra-red (ATR-FTIR) spectroscopy and gene expression analysis of members of the IGF-1 system and bone resorption/formation were performed. mice (both sexes) had reduced body and bone length. Male mice had specific alterations in bone composition (mineral-to-matrix ratio, carbonate substitution and mineral crystallinity), but not in bone remodeling. In contrast, decreases in collagen maturity and increases in , (resorption) and (formation) characterized the bone of females. A single rmIGF-1 administration (0.3 mg/kg) induced short-term changes in bone composition in mice (both sexes). rmIGF-1 treatment in females also increased collagen maturity, and , , and expression. In summary, acute IGF-1 treatment modifies bone composition and local IGF-1 response to bone remodeling in mice with deficiency. These effects depend on sex and provide important insights into potential IGF-1 therapy for growth failure and bone loss and repair.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8070906PMC
http://dx.doi.org/10.3390/ijms22084048DOI Listing

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