[Molecular-genetic evaluation of translocation of bcl-2 gene and locus bcl-1 in selected lymphoproliferative changes]

Abstract

In the work it has been decided to evaluate the occurrence of locus bcl-1 rearrangement in type B chronic lymphatic leukemia and that of gene bcl-2 in non-Hodgkin's lymphoma with diffuse morphology, as well as in reactive lymph nodes. The study material comprised DNA isolated from fragments of lymph nodes sent for routine diagnostic examinations at the Institute of Pathology--Pomeranian Medical Academy. Southern's method was used to examine DNA having been cut with restrictive enzymes, estimating the distribution of gene bcl-2 and locus bcl-1. Resorting to Polymerase Chain Reaction (PCR) translocation t (14;18) was assessed by means of short nucleotides hybridizing with 14 and 18 chromosome sequences restricting this translocation. The amplification product was subsequently studied by Southern's method with probe bcl-2. In 1 out of 18 examined cases of type B chronic lymphocyte leukemia it was disclosed that locus bcl-1 had been rearranged. In 45 cases of non-Hodgkin's lymphoma with diffuse morphology the gen bcl-2 was found to display germline arrangement. Germline position of gen bcl-2 was also revealed in 60 cases of reactive lymph nodes.