Characterization of genetic changes in MCL by interphase FISH on tissue sections
Birgitta Sander1, Ann Wallblom, Andrea Ekroth
1Department of Laboratory Medicine, Division of Pathology, Karolinska Institutet and Karolinska University Hospital Huddinge, Stockholm, Sweden. brigitta.sander@ki.se
Leukemia & Lymphoma
|July 7, 2007
Summary
Genetic aberrations in mantle cell lymphoma (MCL) were analyzed. Some MCL cases lacking additional genetic changes showed lower proliferation and longer survival, indicating potential prognostic value.
Area of Science:
- Hematology
- Oncology
- Genetics
Background:
- Mantle cell lymphoma (MCL) is a heterogeneous lymphoid malignancy.
- Understanding its pathogenetic mechanisms and prognostic factors is crucial for patient management.
Purpose of the Study:
- To investigate genetic aberrations in MCL using interphase FISH.
- To correlate these genetic findings with tumor proliferation and clinical outcome.
Main Methods:
- Interphase fluorescence in situ hybridization (FISH) was performed on 38 MCL samples.
- Genetic aberrations including ATM deletions, p53 deletions, c-myc aberrations, and del16 were analyzed.
- Findings were correlated with proliferation markers and patient survival.
Main Results:
- The t(11;14) translocation was detected in most MCL cases.
- Additional cytogenetic changes, such as ATM deletions and p53 deletions, were observed in a significant subset of patients.
- MCL cases with low cyclin D1 3'UTR often had additional genetic changes, but no specific aberration was uniquely associated with this variant.
- Approximately one-fourth of MCL cases lacked investigated additional aberrations; these showed lower proliferation and some patients had prolonged survival.
Conclusions:
- Genetic aberrations play a role in the heterogeneity of mantle cell lymphoma.
- The absence of certain genetic changes may indicate a less proliferative tumor and potentially better prognosis in some MCL patients.
