Serum IGF-1 affects skeletal acquisition in a temporal and compartment-specific manner - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles PLoS ONE Year : 2011

Serum IGF-1 affects skeletal acquisition in a temporal and compartment-specific manner

Abstract

Insulin-like growth factor-1 (IGF-1) plays a critical role in the development of the growing skeleton by establishing both longitudinal and transverse bone accrual. IGF-1 has also been implicated in the maintenance of bone mass during late adulthood and aging, as decreases in serum IGF-1 levels appear to correlate with decreases in bone mineral density (BMD). Although informative, mouse models to date have been unable to separate the temporal effects of IGF-1 depletion on skeletal development. To address this problem, we performed a skeletal characterization of the inducible LID mouse (iLID), in which serum IGF-1 levels are depleted at selected ages. We found that depletion of serum IGF-1 in male iLID mice prior to adulthood (4 weeks) decreased trabecular bone architecture and significantly reduced transverse cortical bone properties (Ct.Ar, Ct.Th) by 16 weeks (adulthood). Likewise, depletion of serum IGF-1 in iLID males at 8 weeks of age, resulted in significantly reduced transverse cortical bone properties (Ct.Ar, Ct.Th) by 32 weeks (late adulthood), but had no effect on trabecular bone architecture. In contrast, depletion of serum IGF-1 after peak bone acquisition (at 16 weeks) resulted in enhancement of trabecular bone architecture, but no significant changes in cortical bone properties by 32 weeks as compared to controls. These results indicate that while serum IGF-1 is essential for bone accrual during the postnatal growth phase, depletion of IGF-1 after peak bone acquisition (16 weeks) is compartment-specific and does not have a detrimental effect on cortical bone mass in the older adult mouse.
Fichier principal
Vignette du fichier
2011_Courtland_PlosOne_1.pdf (953.25 Ko) Télécharger le fichier
Origin Files produced by the author(s)
Loading...

Dates and versions

hal-02646360 , version 1 (29-05-2020)

Identifiers

Cite

Hayden-William Courtland, Sébastien Elis, Yingjie Wu, Hui Sun, Clifford J Rosen, et al.. Serum IGF-1 affects skeletal acquisition in a temporal and compartment-specific manner. PLoS ONE, 2011, 6 (3), pp.1-10. ⟨10.1371/journal.pone.0014762⟩. ⟨hal-02646360⟩

Collections

INRAE
8 View
27 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More