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Altered distribution of adiponectin isoforms in children with Prader-Willi syndrome (PWS): association with insulin sensitivity and circulating satiety peptide hormones.

Publication ,  Journal Article
Haqq, AM; Muehlbauer, M; Svetkey, LP; Newgard, CB; Purnell, JQ; Grambow, SC; Freemark, MS
Published in: Clin Endocrinol (Oxf)
December 2007

OBJECTIVE: Prader-Willi syndrome (PWS) is a genetic syndrome characterized by relative hypoinsulinaemia and normal or increased insulin sensitivity despite profound obesity. We hypothesized that this increased insulin sensitivity is mediated by increased levels of total and high molecular weight adiponectin and associated with changes in levels of satiety hormones. DESIGN, PATIENTS AND MEASUREMENTS: We measured total adiponectin and its isoforms [high molecular weight (HMW), middle molecular weight (MMW) and low molecular weight (LMW) adiponectin] and satiety hormones in 14 children with PWS [median age 11.35 years, body mass index (BMI) Z-score 2.15] and 14 BMI-matched controls (median age 11.97 years, BMI Z-score 2.34). RESULTS: Despite comparable BMI Z-scores and leptin levels, the PWS children exhibited lower fasting insulin and HOMA-IR (homeostasis model assessment of insulin resistance) scores compared to obese controls. For any given BMI Z-score, the PWS children showed higher concentrations of fasting total and HMW adiponectin and higher HMW/total adiponectin ratios. The HMW/total adioponectin ratio was preserved in children with PWS at high degrees of obesity. In PWS children, fasting plasma total adiponectin, HMW adiponectin and HMW/total adiponectin ratio correlated negatively with age (P < 0.05), HOMA-IR (P < 0.01), BMI Z-score (P < 0.05), insulin (P < 0.01) and leptin (P < 0.05). In addition to higher fasting ghrelin concentrations, the PWS children showed significantly higher fasting levels of total peptide YY (PYY) and gastric inhibitory polypeptide (GIP) compared to obese controls. CONCLUSIONS: Relative to controls of similar age and BMI Z-score, the PWS children had significantly higher levels of total and HMW adiponectin, and increased ratios of HMW/total adiponectin. These findings may explain in part the heightened insulin sensitivity of PWS children relative to BMI-matched controls.

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Published In

Clin Endocrinol (Oxf)

DOI

EISSN

1365-2265

Publication Date

December 2007

Volume

67

Issue

6

Start / End Page

944 / 951

Location

England

Related Subject Headings

  • Thyroxine
  • Thyrotropin
  • Protein Isoforms
  • Prader-Willi Syndrome
  • Peptide YY
  • Peptide Hormones
  • Molecular Weight
  • Male
  • Leptin
  • Insulin Resistance
 

Citation

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Haqq, A. M., Muehlbauer, M., Svetkey, L. P., Newgard, C. B., Purnell, J. Q., Grambow, S. C., & Freemark, M. S. (2007). Altered distribution of adiponectin isoforms in children with Prader-Willi syndrome (PWS): association with insulin sensitivity and circulating satiety peptide hormones. Clin Endocrinol (Oxf), 67(6), 944–951. https://doi.org/10.1111/j.1365-2265.2007.02991.x
Haqq, Andrea M., Michael Muehlbauer, Laura P. Svetkey, Christopher B. Newgard, Jonathan Q. Purnell, Steven C. Grambow, and Michael S. Freemark. “Altered distribution of adiponectin isoforms in children with Prader-Willi syndrome (PWS): association with insulin sensitivity and circulating satiety peptide hormones.Clin Endocrinol (Oxf) 67, no. 6 (December 2007): 944–51. https://doi.org/10.1111/j.1365-2265.2007.02991.x.
Haqq AM, Muehlbauer M, Svetkey LP, Newgard CB, Purnell JQ, Grambow SC, et al. Altered distribution of adiponectin isoforms in children with Prader-Willi syndrome (PWS): association with insulin sensitivity and circulating satiety peptide hormones. Clin Endocrinol (Oxf). 2007 Dec;67(6):944–51.
Haqq, Andrea M., et al. “Altered distribution of adiponectin isoforms in children with Prader-Willi syndrome (PWS): association with insulin sensitivity and circulating satiety peptide hormones.Clin Endocrinol (Oxf), vol. 67, no. 6, Dec. 2007, pp. 944–51. Pubmed, doi:10.1111/j.1365-2265.2007.02991.x.
Haqq AM, Muehlbauer M, Svetkey LP, Newgard CB, Purnell JQ, Grambow SC, Freemark MS. Altered distribution of adiponectin isoforms in children with Prader-Willi syndrome (PWS): association with insulin sensitivity and circulating satiety peptide hormones. Clin Endocrinol (Oxf). 2007 Dec;67(6):944–951.
Journal cover image

Published In

Clin Endocrinol (Oxf)

DOI

EISSN

1365-2265

Publication Date

December 2007

Volume

67

Issue

6

Start / End Page

944 / 951

Location

England

Related Subject Headings

  • Thyroxine
  • Thyrotropin
  • Protein Isoforms
  • Prader-Willi Syndrome
  • Peptide YY
  • Peptide Hormones
  • Molecular Weight
  • Male
  • Leptin
  • Insulin Resistance