Genetic Testing for Health Risks
Predictive Power: Genetic testing can predict disease risks, guide preventive measures, and tailor treatments based on individual genetic profiles.
Polygenic Risk Scores (PRS): These scores quantify genetic liability by aggregating the effects of numerous genetic variants, improving prediction for conditions like cancer, coronary artery disease, obesity, and diabetes compared to single-gene testing.
Population Screening: This approach efficiently identifies carriers of autosomal dominant conditions like BRCA-related cancers and Lynch syndrome that are often missed in routine care.
Supplement to Family History: Genetic testing can identify increased risks for inherited diseases even when family health history is incomplete or non-corroborative.
Personalized Medicine Applications: Testing enhances disease diagnosis and classification (particularly for complex conditions like hematological malignancies and epilepsy), guides treatment selection in oncology and informs early interventions for conditions with strong genetic components.
Pharmacogenomics: Genetic information helps prescribe the safest and most effective drugs, minimizing adverse reactions and optimizing therapeutic outcomes for various conditions.
Precision Medicine Advances: Functional precision medicine, combining genomic profiling with drug sensitivity testing, identifies novel treatment options for relapsed or refractory cancers.
Lifestyle Interventions: Nutrigenomics uses genetic information for personalized nutrition recommendations, though effectiveness varies, and more robust evidence is needed.
Clinical Integration: PRS scores have been incorporated into screening programs in some European countries, particularly for breast cancer, aiding the identification of high-risk individuals who may benefit from enhanced surveillance.
Ethical Considerations: Major concerns include informed consent, privacy, genetic discrimination by insurers or employers, impacts on family dynamics, and potential “genetic fatalism,” where individuals feel predetermined by their genetic makeup.
