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LightCycler technology for the quantitation of bcr/abl fusion transcripts
1Abteilung für Innere Medizin und Poliklinik m.S. Hämatologie und Onkologie, Medizinische Fakultät Charité der Humboldt-Universität zu Berlin, Germany.
Cancer Research
|July 9, 1999
Summary
Quantifying bcr/abl fusion transcripts using LightCycler RT-PCR offers a safe and reproducible alternative for monitoring chronic myelogenous leukemia. This method provides comparable results to existing systems, aiding standardization in clinical diagnostics.
Area of Science:
- Molecular Biology
- Oncology
- Biotechnology
Background:
- Quantifying bcr/abl fusion transcripts is crucial for monitoring chronic myelogenous leukemia (CML).
- Real-time fluorescence reverse transcriptase-PCR (RT-PCR) systems, such as ABI PRISM 7700 SDS, are established for this purpose.
- LightCycler technology presents a potential alternative detection system.
Purpose of the Study:
- To establish and evaluate bcr/abl LightCycler RT-PCR for quantifying major and minor fusion transcripts.
- To compare the performance of LightCycler RT-PCR with the ABI PRISM 7700 SDS system.
- To assess the suitability of TaqMan chemistry in the LightCycler system for clinical applications.
Main Methods:
- Development of bcr/abl LightCycler RT-PCR assays for major and minor fusion transcripts.
- Utilizing TaqMan RT-PCR chemistry and fluorescent probe design.
- Comparison of results with the ABI PRISM 7700 SDS system for quantitation of bcr/abl fusion RNA.
Main Results:
- The developed LightCycler RT-PCR method demonstrated high sensitivity, detecting as few as 10 bcr/abl copies.
- The assay was found to be safe, reproducible, and comparable to the ABI PRISM 7700 SDS.
- A single RT-PCR assay was established to simultaneously detect multiple bcr/abl fusion types (b2a3, b2a2, b3a2, b3a3) with high specificity and sensitivity.
- Absolute quantitation of bcr/abl showed no significant differences between the two systems, with a linear correlation observed.
Conclusions:
- TaqMan chemistry is effectively applicable to the LightCycler system for reliable bcr/abl fusion RNA quantitation.
- Both ABI PRISM 7700 SDS and LightCycler systems meet the criteria for safe and reliable quantitative bcr/abl RT-PCR.
- This standardization facilitates the comparison of results across different laboratories and investigators in CML monitoring.