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Insulin-like growth factor-I and mineral metabolism markers in children with idiopathic decrease in bone mass

Agnieszka Rusińska1, Danuta Chlebna-Sokół

  • 1Department of Paediatric Propedeutics and Bone Metabolic Diseases, Medical University of Łódź 36/50 Sporna St., 91-738 Łódź, Poland.

Clinica Chimica Acta; International Journal of Clinical Chemistry
|December 7, 2005
PubMed

Insights

Children with osteoporosis and osteopenia have lower insulin-like growth factor-I (IGF-I) levels, indicating its role in idiopathic bone mass loss. This finding highlights IGF-I as a potential marker for pediatric bone health.

Area of Science:

  • Pediatric Endocrinology
  • Bone Metabolism
  • Growth Factors

Background:

  • Idiopathic decrease in bone mass is a concern in children.
  • Insulin-like growth factor-I (IGF-I) and IGF-binding protein-3 (IGFBP-3) are crucial for bone development.
  • The relationship between IGF-I, IGFBP-3, and mineral metabolism in pediatric bone disorders requires further elucidation.

Purpose of the Study:

  • To investigate the correlation between serum IGF-I and IGFBP-3 concentrations and mineral metabolism markers.
  • To assess the role of IGF-I in children with idiopathic osteoporosis and osteopenia.

Main Methods:

  • Serum IGF-I and IGFBP-3 levels were measured in 62 children (aged 6-18) with idiopathic osteoporosis/osteopenia and 20 controls.
  • Bone mineral density was assessed using densitometry.
  • Urinary markers of bone resorption (pyridinoline and deoxypyridinoline) were analyzed.

Main Results:

  • Children with osteoporosis and osteopenia exhibited significantly lower mean IGF-I concentrations compared to controls.
  • IGF-I levels positively correlated with total and spinal bone mineral density.
  • In osteoporotic children, IGF-I showed a significant relationship with urinary pyridinoline and deoxypyridinoline.

Conclusions:

  • Reduced serum IGF-I concentrations are associated with decreased bone mineral density and increased bone resorption in children.
  • These findings suggest that IGF-I plays a significant role in the pathogenesis of idiopathic bone mass reduction in pediatric populations.
Abstract

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