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High unacylated ghrelin levels support the concept of anorexia in infants with prader-willi syndrome.

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Beauloye, Véronique [UCL] Diene, Gwenaelle Kuppens, Renske Zech, Francis [UCL] Winandy, Coralie [UCL] Beckers, Dominique [UCL] Tauber, Maithé

(eng) BACKGROUND: Prader-Willi syndrome (PWS) is a rare genetic neurodevelopmental disorder with different nutritional phases from suckling deficit with failure to thrive to early onset of obesity. Hyperghrelinemia has been described in PWS long before the development of obesity. Ghrelin is found in both acylated (AG) and unacylated (UAG) forms in the circulation. In contrast to AG, UAG has been shown to inhibit food intake and to be elevated in anorexia nervosa. The present project is aiming to determine the underlying mechanisms driving the different nutritional phases in PWS. METHODS: Measurement of at least 4 h-fasting plasma acylated and unacylated ghrelin in 37 infants with a genetic diagnosis of PWS aged from 1 month to 4 years and in 100 age-matched controls without endocrine disorder recruited prior to minor surgery. One blood sampling was analysed for each patient/control and clinical data were recorded. Eleven PWS infants underwent repetitive blood samples at 3 or 6-month intervals during routine visits. RESULTS: In infants with PWS, AG is not elevated (p = 0.45), UAG is significantly higher (p = 0.0044; confidence interval 1.06;1.33) resulting in a low AG/UAG ratio (p = 0.0056; confidence interval 0.76;0.95) compared to controls. CONCLUSION: Unlike children and adults with PWS that have high AG and AG/UAG ratio, infants with PWS have elevated UAG that supports the concept of anorexia in the early phases of the disease. The change in AG/UAG ratio possibly drives the switch from failure to thrive to obesity. CLINICAL TRIAL REGISTRATION: NCT02529085 .

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès libre
Publication date 2016
Language Anglais
Journal information "Orphanet Journal of Rare Diseases" - Vol. 11, no. 1, p. 56 [1-8] (2016)
Peer reviewed yes
Publisher BioMed Central Ltd. ((United Kingdom) London)
e-issn 1750-1172
Publication status Publié
Affiliations UCL - (MGD) Service de pédiatrie
UCL - SSS/IREC/EDIN - Pôle d'endocrinologie, diabète et nutrition
UCL - SSS/IREC/PEDI - Pôle de Pédiatrie
UCL - (SLuc) Service d'endocrinologie et diabétologie pédiatrique
UCL - (SLuc) Service de médecine interne et maladies infectieuses (MIMI)
Keywords Anorexia ; Ghrelin ; Infants ; Nutrition ; Obesity ; Prader-Willi syndrome
Links
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Bibliographic reference Beauloye, Véronique ; Diene, Gwenaelle ; Kuppens, Renske ; Zech, Francis ; Winandy, Coralie ; et. al. High unacylated ghrelin levels support the concept of anorexia in infants with prader-willi syndrome.. In: Orphanet Journal of Rare Diseases, Vol. 11, no. 1, p. 56 [1-8] (2016)
Permanent URL http://hdl.handle.net/2078.1/173905