Specificity of Early Childhood Hyperphagia Profiles in Neurogenetic Conditions

Area of Science:

• Neurogenetics
• Pediatric Psychology
• Behavioral Science

Background:

• Hyperphagia is a hallmark of Prader-Willi syndrome (PWS).
• Increasing reports suggest hyperphagia in other neurogenetic conditions (NGC).
• Early identification of hyperphagia's specific characteristics in NGCs is crucial.

Purpose of the Study:

• To compare hyperphagic symptoms in young children with PWS, Angelman syndrome (AS), Williams syndrome (WS), and low-risk controls (LRC).
• To investigate the differentiating features of hyperphagia across these neurogenetic conditions.

Main Methods:

• Caregivers of 4-8-year-olds completed the Hyperphagia Questionnaire (HQ).
• Participants included children with PWS, AS, WS, and LRC.
• Statistical analyses compared HQ scores across groups, controlling for externalizing behaviors.

Main Results:

• All NGC groups exhibited elevated total and behavioral hyperphagia scores compared to LRC.
• Angelman syndrome and Williams syndrome showed higher Drive domain scores.
• Prader-Willi syndrome uniquely showed elevated Severity domain scores.
• After controlling for externalizing behaviors, PWS had significantly higher total HQ scores than other NGCs.

Conclusions:

• Hyperphagic symptoms in early childhood may not reliably distinguish PWS from other NGCs.
• However, hyperphagic phenotypes appear most severe in PWS.
• Further research into these distinct profiles can guide etiology and targeted treatments for NGCs.