Longitudinal study of physiologic insulin resistance and metabolic changes of puberty

Tamara Hannon, Janine Janosky, Silva A. Arslanian

Research output: Contribution to journalArticle

170 Citations (Scopus)

Abstract

Cross-sectional studies have shown that 1) adolescents are insulin resistant compared with prepubertal children and adults, 2) pubertal insulin resistance is likely mediated by growth hormone (GH), and 3) pubertal insulin resistance is associated with increased fat oxidation and decreased glucose oxidation. The aim of this study was to assess the validity of these cross-sectional observations by performing a longitudinal study in normal children during the prepubertal and pubertal periods. Nine healthy, normal weight, prepubertal children underwent hyperinsulinemic-euglycemic and hyperglycemic clamp studies for evaluation of insulin sensitivity and insulin secretion. Children had repeat evaluations during puberty. Consistent with cross-sectional observations, this longitudinal study demonstrated that during puberty: 1) insulin sensitivity decreased by ∼50%, 2) the decrease in insulin sensitivity was compensated by a doubling in insulin secretion, and 3) the decrease in insulin sensitivity was independent of changes in percentage of body fat. Puberty was associated with increased total body lipolysis and decreased glucose oxidation. A novel observation is the demonstration of ∼50% decrease in adiponectin levels at the pubertal time point. These metabolic changes are proposed to be partially mediated by increased GH secretion and are consistent with the Randle cycle of competition between glucose and fat oxidation.

Original languageEnglish (US)
Pages (from-to)759-763
Number of pages5
JournalPediatric Research
Volume60
Issue number6
DOIs
StatePublished - Dec 2006
Externally publishedYes

Fingerprint

Puberty
Longitudinal Studies
Insulin Resistance
Insulin
Glucose
Growth Hormone
Fats
Glucose Clamp Technique
Lipolysis
Adiponectin
Adipose Tissue
Cross-Sectional Studies
Observation
Weights and Measures

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

Cite this

Longitudinal study of physiologic insulin resistance and metabolic changes of puberty. / Hannon, Tamara; Janosky, Janine; Arslanian, Silva A.

In: Pediatric Research, Vol. 60, No. 6, 12.2006, p. 759-763.

Research output: Contribution to journalArticle

Hannon, Tamara ; Janosky, Janine ; Arslanian, Silva A. / Longitudinal study of physiologic insulin resistance and metabolic changes of puberty. In: Pediatric Research. 2006 ; Vol. 60, No. 6. pp. 759-763.
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