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Bone and fat mass in relation to postnatal levels of insulin-like growth factors in prematurely born children at 4y of age
University of Gothenburg, Sweden .
University of Gothenburg, Sweden .
University of Gothenburg, Sweden .
University of Gothenburg, Sweden .
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2014 (English)In: Pediatric Research, ISSN 0031-3998, E-ISSN 1530-0447, Vol. 75, no 4, 544-550 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Children born prematurely may be at risk of developing osteopenia. This study investigated whether insulin-like growth factors (IGFs) in the early postnatal period influence bone mass and body composition in prematurely born children. METHODS: A total of 74 control (gestational age greater than36 wk; n = 37) and preterm (gestational age less than32 wk; n = 37) infants were investigated (mean age +/- SD: 4.59 +/- 0.31 y). Bone mineral density, body composition, and markers of bone and mineral metabolism were investigated in relation to postnatal IGF levels. RESULTS: After adjusting for confounders, we found no differences in bone mass, but significantly less lean mass, increased fat mass, and increased osteocalcin levels in ex-preterm infants. Forward stepwise multiple analysis revealed that higher late postnatal IGF-II levels predict lumbar spine bone mineral content (P less than 0.05) and lean mass (P less than 0.05). When the birth weight standard deviation score was included in the analysis, higher early postnatal IGF-I levels predicted both lumbar spine bone mineral density and bone mineral content (P less than 0.05). Higher early postnatal IGF binding protein-3 (P less than 0.01) predicted increased fat mass at 4-y follow-up. CONCLUSION: Ex-preterm children have normal bone mass but different body composition compared with full-term controls. Higher early IGF-I and late postnatal IGF-II concentrations are positive predictors of lumbar spine bone mass.

Place, publisher, year, edition, pages
Nature Publishing Group: Open Access Hybrid Model Option A , 2014. Vol. 75, no 4, 544-550 p.
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Medical and Health Sciences
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URN: urn:nbn:se:liu:diva-106018DOI: 10.1038/pr.2014.4ISI: 000333139400010OAI: oai:DiVA.org:liu-106018DiVA: diva2:712948
Available from: 2014-04-17 Created: 2014-04-17 Last updated: 2017-12-05

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Magnusson, Per

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Division of Microbiology and Molecular MedicineFaculty of Health SciencesDepartment of Clinical Chemistry
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