Abstract

Distinction between benign and malignant T-cell lymphoproliferative diseases can be difficult using morphological criteria. Using multiplex polymerase chain reaction system we have tested a series of patients with various lymphoproliferative disorders to detect clonal T-lymphocyte populations.

Results show that clonal amplification products were obtained from all 10 patients with T-cell lymphoproliferative disorders while the amplification of DNA samples from B-cell neoplasms and normal individuals revealed polyclonal amplification products.

By splitting the multiplex primer mix, the patient specific T-cell receptor γ rearrangement was determined: five out of ten patients showed the exclusive presence of a single T-cell receptor γ gene rearrangement. Three patients exhibited two rearranged T-cell receptor γ genes, while in two patients positive reactions were obtained with three pairs of primers for variable and joining segments.

Molecular analysis of rearranged T-cell receptor genes by multiplex polymerase chain reaction represents a useful and rapid tool for confirming diagnosis, to determine the extent of disease and to monitor the response to therapy.