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Postgenomic medicine. Presymptomatic testing for prediction and prevention
1Departments of Human Genetics and Pediatrics, UCLA School of Medicine, Los Angeles, California, USA.
Clinics in Perinatology
|August 14, 2001
Summary
Genetic screening is shifting from traditional methods to molecular genetic testing (DNA/RNA), impacting family dynamics and raising privacy concerns. This evolution necessitates careful consideration of predictive testing, clinical validity, and intervention efficacy for public health advancement.
Area of Science:
- Genetics and genomics
- Public health
- Medical ethics
Background:
- Genetic screening paradigms are evolving from traditional analytes to molecular genetic testing.
- This shift impacts family units, raising concerns about privacy, confidentiality, and potential discrimination.
Observation:
- Screening is transitioning from Mendelian disease identification to predictive testing for adult-onset and complex disorders.
- Genotype-phenotype correlations are complex, influenced by genetic and environmental factors, impacting genetic counseling.
- Molecular genetic testing is rapidly moving from research to clinical application.
Findings:
- Interpreting genetic test results for single-gene disorders is often straightforward, but complex diseases require careful consideration of population demographics for accurate counseling.
- The efficacy of interventions following genetic testing and the appropriate age for predictive testing are critical considerations.
- Newborn screening exemplifies the value of population-based predictive testing.
Implications:
- The Human Genome Project provides tools for presymptomatic disease prediction and prevention, significantly impacting public health.
- Ethical frameworks must adapt to address the implications of genetic information on individuals and families.
- Further research is needed to refine the clinical validity and utility of genetic testing for complex diseases.