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Paradox of a better test for Huntington's disease
A Maat-Kievit1, M Vegter-van der Vlis, M Zoeteweij
1Department of Clinical Genetics, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands. J.A.Maat@KGC.AZL.NL
Journal of Neurology, Neurosurgery, and Psychiatry
|October 14, 2000
Summary
The identification of the Huntington's disease (HD) mutation improved predictive testing but led to lower-than-expected uptake and new psychological challenges for at-risk individuals.
Area of Science:
- Genetics
- Neurology
- Medical Ethics
Background:
- The identification of the Huntington's disease (HD) mutation revolutionized genetic testing.
- Predictive and prenatal testing became available for individuals at risk of inheriting HD.
Purpose of the Study:
- To evaluate the impact of the HD mutation identification on predictive and prenatal testing uptake and outcomes.
- To describe the consequences and emerging challenges associated with HD genetic testing.
Main Methods:
- A retrospective study analyzed 1032 individuals at risk for HD in The Netherlands.
- Data on test applicants, procedures, and results were compared before and after the mutation identification (1987-1997).
- Uptake rates, sociodemographic variables, and test results were examined.
Main Results:
- Predictive test uptake was 24%, and prenatal test uptake was 2%, falling short of expectations.
- No significant changes in sociodemographic data were observed between periods.
- Post-mutation identification, there was an initial increase in applicants, followed by a decrease after 1995, alongside new reproductive choices and uncertainties.
Conclusions:
- Despite reliable predictive testing, uptake for both predictive and prenatal testing did not meet expectations.
- The identification of the HD mutation introduced new psychological issues and uncertainties for individuals and families.
- Further research is needed to address the evolving needs of HD-affected families.