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Fragile X syndrome and selective mutism
R J Hagerman1, J Hills, S Scharfenaker
1Child Development Unit, The Children's Hospital, JFK Center for Developmental Disabilities, University of Colorado Health Sciences Center, Denver, USA.
American Journal of Medical Genetics
|April 20, 1999
Summary
This study reports a link between fragile X syndrome (FXS) and selective mutism (SM). The FMR1 gene mutation may be the first genetic cause identified for SM, warranting further research.
Area of Science:
- Neurogenetics
- Child Psychiatry
- Developmental Neuroscience
Background:
- Selective mutism (SM) is an anxiety disorder characterized by a consistent failure to speak in specific social situations.
- Fragile X syndrome (FXS) is a genetic disorder caused by a mutation in the FMR1 gene, often leading to intellectual disability and behavioral issues.
Observation:
- A case study of a 12-year-old girl with FXS (FMR1 full mutation) presenting with SM, social anxiety, and shyness.
- The patient's sister, also with the FMR1 full mutation, had a history of SM that resolved during adolescence.
Findings:
- This report details the first observed association between FXS and SM.
- The FMR1 mutation is proposed as the first identified gene mutation linked to SM.
- The patient showed positive response to fluoxetine and psychotherapy.
Implications:
- The findings suggest a potential genetic basis for SM, specifically implicating the FMR1 gene.
- Further research is recommended to determine the prevalence of the FMR1 mutation in SM patients.
- This discovery could pave the way for targeted genetic screening and therapeutic interventions for SM.