Prader-Willi Syndrome Supportive Care Protocol

Prader-Willi Syndrome (PWS) is a complex genetic disorder caused by loss of function of genes on chromosome 15. It occurs in about 1 in 15,000 births and affects multiple body systems.

KEY FEATURES:

Infancy:

•Severe hypotonia (floppy baby)

•Feeding difficulties and poor weight gain

•Developmental delays

Childhood and beyond:

•Insatiable appetite (hyperphagia) - the hallmark feature

•Obesity if food access not controlled

•Short stature

•Intellectual disability (usually mild-moderate)

•Behavioral problems (tantrums, obsessive behaviors)

•Hypogonadism (incomplete puberty)

MAJOR CHALLENGES:

1. Food-seeking behavior: Constant drive to eat; requires strict environmental control

2. Obesity complications: Type 2 diabetes, sleep apnea, heart disease

3. Behavioral issues: Emotional instability, stubbornness, perseveration

CRITICAL: PWS requires comprehensive, multidisciplinary care. This protocol is SUPPORTIVE ONLY.

MANAGEMENT:

•Nutrition: Strict calorie control; food security (locked access)

•Growth hormone therapy: Standard of care; improves height, body composition, strength

•Physical activity: Regular exercise essential

•Behavioral support: Consistent routines, behavioral therapy

•Monitor for: Sleep apnea, scoliosis, diabetes, osteoporosis

CALORIC NEEDS:

•Much lower than typical: ~8-11 kcal/cm height for weight maintenance

•Supervised meal times; controlled portions

* Vitamin D and Calcium are essential for bone health (osteoporosis common).

* Fiber and probiotics help with chronic constipation.

* CoQ10 and carnitine may support energy metabolism.

Expected timeline: PWS is lifelong. Management focuses on preventing obesity, optimizing development, and quality of life.

Clinical Perspective

Prader-Willi Syndrome: Genomic imprinting disorder from loss of paternally-expressed genes at 15q11-q13. Mechanisms: deletion (70%), maternal uniparental disomy (25%), imprinting defect (5%). Prevalence ~1:15,000. Phases: infantile hypotonia/failure to thrive, then hyperphagia onset (usually age 2-8) leading to obesity. Complications: T2DM, sleep apnea, scoliosis, osteoporosis, behavioral issues.

CRITICAL: Growth hormone therapy is standard of care - improves height, body composition, bone density, strength. Strict caloric restriction essential - lock food access ("food security"). Nutritional needs: ~8-11 kcal/cm height for maintenance; ~7-8 kcal/cm for weight loss. Monitor: sleep apnea, diabetes, scoliosis, osteoporosis. Supplements address common deficiencies and complications but don't treat underlying syndrome.

* Vitamin D (B-grade): Bone health. Systematic review: (PMID: 28750270). 1000-2000 IU daily. Deficiency common.

* Calcium (B-grade): Osteoporosis prevention. Guidelines: (PMID: 28332116). 1000-1200mg daily.

* CoQ10 (C-grade): Energy metabolism. Review: (PMID: 24268541). 50-100mg daily.

* Omega-3 (C-grade): Brain health. Review: (PMID: 27840029). 1-2g EPA+DHA daily.

* Carnitine (C-grade): Fatty acid metabolism. Review: (PMID: 23597877). 500-1000mg daily.

* Probiotics (C-grade): Constipation. Review: (PMID: 29882905). 10-20 billion CFU daily.

* Fiber (C-grade): Constipation; satiety. Guidelines: (PMID: 28332116). Age-appropriate.

Assessment targets: Weight, BMI, body composition, bone density, glucose/HbA1c, sleep study, scoliosis screening, developmental progress.

Protocol notes: Growth hormone: start early (infancy if possible); improves nearly all features; continue into adulthood; monitor for scoliosis progression, sleep apnea. Nutrition: the most challenging aspect; food-seeking is compulsive/neurological, not willful; strict control of food access is not cruel - it's medically necessary. Exercise: daily activity essential; may need encouragement due to low energy. Sleep apnea: very common; CPAP may be needed; can be central or obstructive. Behavioral: consistent routines; minimize transitions; therapies help but behavior is largely neurological. Education: special education services; many can work in supported employment. Hypogonadism: sex hormone replacement at puberty; affects bone health. Skin picking: common; keep nails short; behavioral strategies. Temperature: abnormal thermoregulation; may not feel pain normally. Surgery: anesthesia risks; inform team of diagnosis. Transition: adult care planning important. Support: Prader-Willi Syndrome Association resources.

View All Protocols