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Molecular methods for detecting t(11;14) translocations in mantle-cell lymphomas
H Fan1, M L Gulley, R D Gascoyne
1Department of Pathology, University of Texas Health Science Center at San Antonio, 78284-7750, USA.
Summary
Detecting the t(11;14) translocation in mantle-cell lymphoma (MCL) is crucial. This study compared Southern blot and PCR methods, finding both effective for diagnosing MCL and detecting minimal residual disease.
Area of Science:
- Hematology
- Molecular Biology
- Oncology
Background:
- The t(11;14) translocation and its molecular correlate, bcl1/JH, are hallmarks of mantle-cell lymphoma (MCL).
- Molecular detection of this translocation aids in MCL diagnosis, classification, and minimal residual disease (MRD) assessment.
Purpose of the Study:
- To compare the detection frequency of the bcl1/JH translocation using polymerase chain reaction (PCR) versus Southern blot analysis.
- To evaluate these molecular methods in MCL cases with confirmed t(11;14) by cytogenetics.
Main Methods:
- Southern blot analysis using probes for the major translocation cluster (MTC) and p94 region.
- Polymerase chain reaction (PCR) employing two distinct bcl1 MTC primer sets.
- Analysis of 18 MCL cases with known t(11;14) cytogenetic findings.
Main Results:
- Southern blot detected bcl1 rearrangement in 72% (13/18) of cases, with most at MTC breakpoints.
- The 2.1-kb MTC probe 'b' demonstrated superior sensitivity over the 700-bp probe 'a'.
- PCR identified the MTC translocation in 10 of 12 cases, with both primer sets performing comparably.
Conclusions:
- Both Southern blot and PCR are valuable molecular techniques for detecting t(11;14) in MCL.
- These findings can guide clinical laboratories in optimizing molecular detection of bcl1 translocations for diagnosis and MRD monitoring in MCL.