Sex-specific regulation of body size and bone slenderness by the acid labile subunit

Hayden William Courtland, Victoria DeMambro, Jane Maynard, Hui (Herb) Sun, Sebastien Elis, Clifford Rosen, Shoshana Yakar

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Insulin-like growth factor 1 (IGF-1) is a crucial mediator of body size and bone mass during growth and development. In serum, IGF-1 is stabilized by several IGF-1-binding proteins (IGFBPs) and the acid labile subunit (ALS). Previous research using ALS knockout (ALSKO) mice indicated a growth retardation phenotype, and clinical reports of humans have indicated short stature and low bone mineral density (BMD) in patients with ALS deficiency. To determine the temporal and sex-specific effects of ALS deficiency on body size and skeletal development during growth, we characterized control and ALSKO mice from 4 to 16 weeks of age. We found that female ALSKO mice had an earlier-onset reduction in body size (4 weeks) but that both female and male ALSKO mice were consistently smaller than control mice. Interestingly, skeletal analyses at multiple ages showed increased slenderness of ALSKO femurs that was more severe in females than in males. Both male and female ALSKO mice appeared to compensate for their more slender bones through increased bone formation on their endosteal surfaces during growth, but ALSKO females had increased endosteal bone formation compared with ALSKO males. This study revealed age- and sex-specific dependencies of body size and bone size on the ALS. These findings may explain the heterogeneity in growth and BMD measurements reported in human ALS-deficient patients.

Original languageEnglish (US)
Pages (from-to)2059-2068
Number of pages10
JournalJournal of Bone and Mineral Research
Volume25
Issue number9
DOIs
StatePublished - Sep 2010
Externally publishedYes

Fingerprint

Body Size
Knockout Mice
Bone and Bones
Acids
Somatomedins
Growth and Development
Osteogenesis
Bone Density
Growth
Femur
Phenotype
Serum
Research

Keywords

  • Bone
  • Endocrine
  • IGF-1
  • Mechanical Properties
  • Micro-computed Tomography
  • Sex
  • Transgenic Mice

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Endocrinology, Diabetes and Metabolism

Cite this

Sex-specific regulation of body size and bone slenderness by the acid labile subunit. / Courtland, Hayden William; DeMambro, Victoria; Maynard, Jane; Sun, Hui (Herb); Elis, Sebastien; Rosen, Clifford; Yakar, Shoshana.

In: Journal of Bone and Mineral Research, Vol. 25, No. 9, 09.2010, p. 2059-2068.

Research output: Contribution to journalArticle

Courtland, HW, DeMambro, V, Maynard, J, Sun, HH, Elis, S, Rosen, C & Yakar, S 2010, 'Sex-specific regulation of body size and bone slenderness by the acid labile subunit', Journal of Bone and Mineral Research, vol. 25, no. 9, pp. 2059-2068. https://doi.org/10.1002/jbmr.94
Courtland, Hayden William ; DeMambro, Victoria ; Maynard, Jane ; Sun, Hui (Herb) ; Elis, Sebastien ; Rosen, Clifford ; Yakar, Shoshana. / Sex-specific regulation of body size and bone slenderness by the acid labile subunit. In: Journal of Bone and Mineral Research. 2010 ; Vol. 25, No. 9. pp. 2059-2068.
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