Overview: DNA Profiling TestIntroduction: The DNA Profiling Test analyzes DNA to establish paternity or kinship, confirming biological relationships. Aligned with 2023 AABB guidelines, it uses PCR for high specificity, aiding in genetic screening. This test is critical for guiding legal, familial, or medical decisions and improving outcomes in molecular pathology for individuals seeking relationship confirmation.
Other Names: Paternity Test, Kinship DNA Assay.
FDA Status: Laboratory-developed test (LDT), meeting molecular pathology standards for diagnostic accuracy.
Historical Milestone: DNA profiling began in the 1980s with forensic genetics. PCR-based profiling emerged in the 1990s, and by the 2000s, STR analysis improved accuracy.
Purpose: Confirms biological relationships, guides legal or medical decisions, and monitors DNA profiles for paternity or kinship.
Test Parameters: 1. DNA Profile
Pretest Condition: No fasting required. Collect whole blood, buccal swab, or saliva at any time. Report purpose of testing (e.g., paternity, kinship) and relevant family history.
Specimen: 2-5 mL whole blood (EDTA), 1-2 buccal swabs (sterile swab), or 1-2 mL saliva (sterile container). Transport in a biohazard bag within 24 hours.
Sample Stability at Room Temperature: 24 hours
Sample Stability at Refrigeration: 48 hours
Sample Stability at Frozen: Not frozen
Medical History: Document purpose of testing and family relationships. Include any prior genetic testing results.
Consent: Written consent required, detailing the tests purpose, legal implications, and potential impact on familial relationships.
Procedural Considerations: Uses PCR with STR analysis to generate DNA profiles. Results are available in 3-5 days, supporting legal or medical decisions.
Factors Affecting Result Accuracy: Contamination or low DNA yield can affect results. Improper sample collection may reduce accuracy.
Clinical Significance: Matching DNA profiles confirm biological relationships, supporting paternity or kinship claims. Non-matching profiles rule out relationships.
Specialist Consultation: Consult a genetic counselor or forensic geneticist for result interpretation.
Additional Supporting Tests: Additional DNA markers or family member testing to confirm complex relationships.
Test Limitations: Results depend on sample quality and reference profiles. Clinical correlation is required.
References: AABB DNA Testing Guidelines, 2023; Forensic Science International, Butler JM, 2022.
