Abstract
Two different molecular genetic methods were compared for their suitability for monitoring minimal residual disease in patients with follicular lymphoma (FL) treated with high-dose therapy and autologous stem cell transplantation. Fifteen patients were selected because of a specific PCR-amplifiable t(14;18) mbr translocation. PCR amplification of rearrangements of the complementary region III (CDRIII) of the immunoglobulin heavy chain gene was also carried out. After autologous stem cell transplantation, patients were prospectively monitored with both molecular genetic methods. Seven of the 15 patients with detectable t(14;18) prior to transplantation were persistently negative during follow-up to 32 months post transplant. None of these patients relapsed, whereas four of eight patients with positive PCR signals post transplant relapsed. Comparing t(14;18) and PAGE results, we observed six patients showing clonal signals in CDRIII PAGE in spite of persistent negativity of t(14;18) PCR. We concluded that in patients with FL, t(14;18) PCR is superior to CDRIII PCR in terms of sensitivity and specificity. A positive t(14;18) PCR during the first year post transplant is highly predictive for disease recurrence. CDRIII PCR may be used for monitoring in t(14;18) negative lymphomas. However, due to the poor specificity of conventional gel electrophoresis PCR, the use of clone-specific probes is highly desirable.
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von Neuhoff, N., Dreger, P., Suttorp, M. et al. Comparison of different strategies of molecular genetic monitoring following autologous stem cell transplantation in patients with follicular lymphoma. Bone Marrow Transplant 22, 161–166 (1998). https://doi.org/10.1038/sj.bmt.1701300
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DOI: https://doi.org/10.1038/sj.bmt.1701300
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