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Serum concentrations of insulin-like growth factor-I, insulin-like growth factor binding protein-3 and cardiovascular risk factors in adolescents.
MedLine Citation:
PMID:  21478207     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: The risk association between the insulin like growth factor-I (IGF-I) system and cardiovascular risk is inconclusive in adults and under-explored in adolescents. We aimed to investigate the associations between serum concentrations of IGF-I and IGF binding protein-3 (IGFBP-3) and cardiovascular risk factors in adolescents. METHODS: This was a cross-sectional, population-based, observational study in a school setting with 2102 Hong Kong Chinese adolescents aged 12-19 years. Serum IGF-I and IGFBP-3 concentrations were measured by chemiluminescence immunoassays. Anthropometric indices and traditional cardiovascular risk factors were assessed. RESULTS: After excluding participants with abnormal thyroid and liver test results, 765 boys and 877 girls, mean (±SD) age of 15.3 (±2.0) and 15.7 (±2.0) years, respectively, were included in the analysis. Multivariable regression analyses revealed that both IGF-I and IGFBP-3 concentrations were independently associated with waist circumference, fasting insulin and haemoglobin concentrations in boys (all P < 0.05), systolic blood pressure, serum creatinine, fasting insulin and haemoglobin concentrations in girls (all P < 0.05). In girls, IGF-I was also associated with C-reactive protein concentration (P < 0.001) and IGFBP-3 was associated with fasting triglyceride concentration (P < 0.001). Compared with adolescents with the lowest tertile, the top tertile of both IGF-I and IGFBP-3 concentrations were associated with increased odds of having overweight/obesity, top tertiles of insulin and haemoglobin in both boys and girls (P for trend, all <0.05). CONCLUSIONS: The associations between serum IGF-I, IGFBP-3, obesity, cardiovascular risk factors, insulin and haemoglobin suggest that dysregulation of the IGF system may play a linking role for the clustering of cardiovascular risk factors.
Authors:
Alice P S Kong; Kai-Chow Choi; Gary W K Wong; Gary T C Ko; Chung-Shun Ho; Michael H M Chan; Risa Ozaki; Ronald C W Ma; Joseph T F Lau; Juliana C N Chan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-8
Journal Detail:
Title:  Annals of clinical biochemistry     Volume:  -     ISSN:  1758-1001     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0324055     Medline TA:  Ann Clin Biochem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Medicine and Therapeutics.
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