Question 1

What is Prader-Willi Syndrome?

Accepted Answer

Prader-Willi Syndrome results from loss of function of paternal genes on chromosome 15, either through deletion, maternal uniparental disomy, or imprinting defects. In infancy, affected individuals typically present with poor muscle tone, weak cry, and feeding difficulties that may require specialized feeding techniques. Between ages 1 and 6, a dramatic change occurs, with development of hyperphagia—an insatiable appetite and obsession with food. Without strict environmental controls and dietary management, rapid weight gain and severe obesity develop. Individuals with PWS often have distinctive facial features including a narrow forehead, almond-shaped eyes, and downturned mouth. Behavioral and psychiatric issues, including obsessive-compulsive behaviors and anxiety, frequently occur. Growth hormone therapy is often used to address short stature and poor muscle development.

Question 2

What are the symptoms of Prader-Willi Syndrome?

Accepted Answer

Common symptoms include: Poor muscle tone (hypotonia) in infancy, Weak cry and poor feeding in newborns, Excessive hunger and rapid weight gain in childhood, Short stature and slow growth, Underdeveloped sexual organs and incomplete sexual development, Intellectual disability and learning challenges. Severity and presentation can vary between individuals.

Question 3

How can I find clinical trials for Prader-Willi Syndrome?

Accepted Answer

Active research in Prader-Willi Syndrome focuses on gene therapy approaches, targeted treatments for hyperphagia, and metabolic interventions. Clinical trials are investigating oxytocin therapy, gene replacement strategies, and pharmacological approaches to appetite regulation. Growth hormone therapy remains a cornerstone treatment, and newer trials explore its optimization alongside other interventions. Families should contact their endocrinologist or the Prader-Willi Syndrome Association to learn about trial opportunities and genetic counseling.

Question 4

What phase are Prader-Willi Syndrome clinical trials in?

Accepted Answer

Trial Friend shows a visual trial pipeline for Prader-Willi Syndrome organized by phase (Phase 1 through Phase 4). Each trial is displayed on a timeline showing its start date, current progress, and estimated completion date. You can see which trials are actively recruiting versus opening soon, and track when each trial was last updated.

Question 5

Who are the leading researchers studying Prader-Willi Syndrome?

Accepted Answer

Trial Friend identifies principal investigators, study directors, and study chairs from active Prader-Willi Syndrome clinical trials on ClinicalTrials.gov. Researchers are ranked by the number of active trials they are involved in, with their institutional affiliations displayed.

Question 6

How do I know if a Prader-Willi Syndrome clinical trial is still active?

Accepted Answer

Each trial on Trial Friend shows a freshness indicator based on when it was last updated on ClinicalTrials.gov. Trials updated within the last 3 months show "Recently updated." Trials without updates for over 6 months are flagged so you can focus on the most active studies. Each trial also shows a progress bar with its start date, estimated completion, and how far along it is.

Prader-Willi Syndrome

About Prader-Willi Syndrome

Common Symptoms

Who It Affects

Getting Involved in Clinical Trials

Trusted Sources

Active Clinical Trials for Prader-Willi Syndrome

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