Study of Smith-Lemli-Opitz Syndrome
Launched by EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH AND HUMAN DEVELOPMENT (NICHD) · Nov 3, 1999
Trial Information
Current as of May 09, 2025
Completed
Keywords
ClinConnect Summary
Smith-Lemli-Opitz syndrome (SLOS) is an autosomal recessive multiple congenital anomaly/mental retardation syndrome. Typical clinical features include a distinctive facial appearance, mental retardation, autistic behavior, hypotonia, failure to feed, poor growth, decreased life span, and variable structural anomalies of the heart, lungs, brain, gastrointestinal tract, limbs, genitalia and kidneys. The SLOS phenotypic spectrum is broad and variable. At the severe end of the spectrum SLOS is a lethal disorder with multiple major congenital anomalies; whereas, mild cases of SLOS present with a...
Gender
ALL
Eligibility criteria
- * INCLUSION CRITERIA:
- • Any patient with biochemically confirmed SLOS will be accepted into this study. Patients of any age, either gender, or any ethnicity will be accepted into this study. No exclusions will be made based on race or gender. Historically, more males than females have been diagnosed as having SLOS. This bias was likely a result of the fact that genital hypoplasia is readily apparent in a male, and therefore the clinical diagnosis is easier to make in a male patient. SLOS syndrome appears more commonly in individuals of Northern European ancestry. Out of 150 biochemically proven cases, only one was an African American and no patients of Asian descent were reported. One SLOS mutant allele (R404C) appears to be present in individuals of French Canadian and Creole heritage. This likely represents a founder effect. One puzzling finding is that the carrier rate of the most common SLOS mutant allele in Black Canadians from Ontario and African Americans from Pennsylvania appears to be approximately 0.7%. However, clinical cases appear to be rare. The predominance of Caucasians reported in the literature may represent a bias of ascertainment of the disorder, variable presentation in different ethnic groups, or a founder effect in some ethnic groups. Because we function as a referral center with respect to recruitment, the ethnic background of our population is likely going to reflect the overall population of diagnosed cases.
- EXCLUSION CRITERIA:
- • Patients will be excluded if they cannot travel to the NIH because of their medical condition.
- • Pregnant women will be excluded, and a negative urine pregnancy test will be required of menstruating women. This protocol focuses on biosampling. Increasing blood draws during pregnancy for research is not appropriate. Fetuses will be excluded since the proposed evaluations are not possible during fetal life.
About Eunice Kennedy Shriver National Institute Of Child Health And Human Development (Nichd)
The Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) is a prominent research agency within the National Institutes of Health (NIH), dedicated to advancing the health and well-being of children, families, and individuals across the lifespan. NICHD supports a wide range of clinical trials and research initiatives aimed at understanding the complex biological, behavioral, and environmental factors that influence human development and health. By fostering innovative research and facilitating collaboration among scientists, healthcare professionals, and communities, NICHD plays a vital role in translating scientific discoveries into effective interventions and policies that enhance child health, reproductive health, and the prevention of diseases.
Contacts
Jennifer Cobb
Immunology at National Institute of Allergy and Infectious Diseases (NIAID)
Locations
Bethesda, Maryland, United States
Bethesda, Maryland, United States
Patients applied
Trial Officials
Samar N Rahhal, M.D.
Principal Investigator
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Timeline
First submit
Trial launched
Trial updated
Estimated completion
Not reported
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