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Automated DNA diagnostics using an ELISA-based oligonucleotide ligation assay
D A Nickerson1, R Kaiser, S Lappin
1Division of Biology, California Institute of Technology, Pasadena 91125.
Summary
This study presents an automated DNA diagnostics method using polymerase chain reaction (PCR) and oligonucleotide ligation assay (OLA). This rapid, nonisotopic strategy aids in diagnosing genetic diseases and forensic DNA typing.
Area of Science:
- Molecular Biology
- Medical Diagnostics
- Genetics
Background:
- The molecular basis of human diseases is increasingly understood.
- DNA diagnostics are crucial for identifying specific DNA sequences in medicine.
Purpose of the Study:
- To demonstrate an automated, nonisotopic DNA diagnostics strategy.
- To apply this strategy for diagnosing genetic diseases and for genetic linkage mapping.
Main Methods:
- Utilized polymerase chain reaction (PCR) for amplifying target DNA segments.
- Employed a colorimetric oligonucleotide ligation assay (OLA) for discriminating allelic sequence variants.
- Developed an automated PCR/OLA procedure.
Main Results:
- Successfully applied the automated PCR/OLA to diagnose sickle cell anemia and cystic fibrosis (delta F508 mutation).
- Demonstrated its utility in genetic linkage mapping of the human T-cell receptor beta-chain locus.
- Validated the system's speed and accuracy.
Conclusions:
- The automated PCR/OLA strategy offers a rapid system for diagnosing genetic, malignant, and infectious diseases.
- This approach is a powerful tool for genetic linkage mapping and forensic DNA typing.