RT-PCR — oncology-focused definition
RT-PCR (Reverse Transcription Polymerase Chain Reaction) is a molecular laboratory technique used to detect and quantify RNA sequences by first converting RNA into complementary DNA (cDNA) using reverse transcriptase, followed by amplification with PCR.
Oncology relevance:
- Widely used to detect fusion gene transcripts, oncogene expression, and minimal residual disease (MRD).
- Highly sensitive and specific, capable of detecting one malignant cell among tens of thousands of normal cells.
Applications in cancer diagnostics and therapy monitoring
| Use | Example | Clinical Relevance |
|---|---|---|
| Fusion gene detection | BCR–ABL1 in CML / Ph+ ALL | Confirms diagnosis and guides TKI therapy |
| MRD monitoring | BCR–ABL1 transcript levels over time | Monitors treatment response, early relapse |
| Other oncogenic transcripts | PML–RARA in APL | Confirms diagnosis and tracks therapy effectiveness |
Key takeaway:
RT-PCR is a critical molecular tool in oncology for diagnosis, prognosis, and treatment monitoring, particularly for cancers driven by fusion genes or specific oncogene transcripts.
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