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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.
Clin Endocrinol (Oxf) 2007; 67(6):944-51CE

Abstract

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.

Authors+Show Affiliations

Department of Pediatrics, Division of Pediatric Endocrinology, Duke University Medical Center, Durham, NC 27710, USA. haqq0001@mc.duke.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17666087

Citation

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." Clinical Endocrinology, vol. 67, no. 6, 2007, pp. 944-51.
Haqq AM, Muehlbauer M, Svetkey LP, 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;67(6):944-51.
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. Clinical Endocrinology, 67(6), pp. 944-51.
Haqq AM, 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;67(6):944-51. PubMed PMID: 17666087.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Altered distribution of adiponectin isoforms in children with Prader-Willi syndrome (PWS): association with insulin sensitivity and circulating satiety peptide hormones. AU - Haqq,Andrea M, AU - Muehlbauer,Michael, AU - Svetkey,Laura P, AU - Newgard,Christopher B, AU - Purnell,Jonathan Q, AU - Grambow,Steven C, AU - Freemark,Michael S, Y1 - 2007/07/30/ PY - 2007/8/2/pubmed PY - 2012/4/25/medline PY - 2007/8/2/entrez SP - 944 EP - 51 JF - Clinical endocrinology JO - Clin. Endocrinol. (Oxf) VL - 67 IS - 6 N2 - 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. SN - 1365-2265 UR - https://www.unboundmedicine.com/medline/citation/17666087/Altered_distribution_of_adiponectin_isoforms_in_children_with_Prader_Willi_syndrome__PWS_:_association_with_insulin_sensitivity_and_circulating_satiety_peptide_hormones_ L2 - https://doi.org/10.1111/j.1365-2265.2007.02991.x DB - PRIME DP - Unbound Medicine ER -