Saeid Ghorbian1. 1. Department of Molecular Biology, Ahar Branch, Islamic Azad University, Ahar, Iran. Electronic address: ghorbian20@yahoo.com.
Abstract
BACKGROUND: Clonality testing for immunoglobulin gene rearrangement analysis could be implemented effectively as a useful technique for conventional diagnosis of lymphoma. The European Biomedicine and Health Concerted Action Project BMH4-CT98-3936 (BIOMED-2) have been suggested a gold standard method to clonality detection. OBJECTIVES: We tested empirically clonality rearrangements of IGH and incomplete IGH D-J, on formalin-fixed, paraffin embedded (FFPE) tissue of patients with diffuse large B cell lymphoma (DLBCL). MATERIAL AND METHODS: This appraisal was conveyed on 50 sequential FFPE specimens of patients with DLBCL. We carried out a standard multiplex PCR and heteroduplex techniques to analysis of IGH and incomplete IGH D-J clonal gene rearrangements. RESULTS: In our investigation, we were identified a total positive monoclonality of 96% (48/50) for IGH and 58% (29/50) for incomplete IGH D-J. The percentage of positive clonality was detected in three frameworks (FRI, II, III) of IGH revealed 50% (25/50), 28% (14/50) and 18% (9/50) to FRIII, FRII and FRI, respectively. Analysis of incomplete IGH D-J showed 34% (17/50) and 24% (12/50) rates of positive clonality for DH1-6-JH and DH7-JH, respectively. In the 4% (2/50) of cases was no detected any gene rearrangements in both of IGH and incomplete IGH D-J genes. CONCLUSIONS: Analysis of molecular clonality gene rearrangements on FFPE tissues disclosed that using BIOMED-2 protocols, could be improvement significant clinicopathological diagnosis of DLBCL. Clonality testing is believable that to suggest as a helpful and credible technique for clonality detection in the routine diagnosis of DLBCL and other lymphoproliferative disorders.
BACKGROUND: Clonality testing for immunoglobulin gene rearrangement analysis could be implemented effectively as a useful technique for conventional diagnosis of lymphoma. The European Biomedicine and Health Concerted Action Project BMH4-CT98-3936 (BIOMED-2) have been suggested a gold standard method to clonality detection. OBJECTIVES: We tested empirically clonality rearrangements of IGH and incomplete IGH D-J, on formalin-fixed, paraffin embedded (FFPE) tissue of patients with diffuse large B cell lymphoma (DLBCL). MATERIAL AND METHODS: This appraisal was conveyed on 50 sequential FFPE specimens of patients with DLBCL. We carried out a standard multiplex PCR and heteroduplex techniques to analysis of IGH and incomplete IGH D-J clonal gene rearrangements. RESULTS: In our investigation, we were identified a total positive monoclonality of 96% (48/50) for IGH and 58% (29/50) for incomplete IGH D-J. The percentage of positive clonality was detected in three frameworks (FRI, II, III) of IGH revealed 50% (25/50), 28% (14/50) and 18% (9/50) to FRIII, FRII and FRI, respectively. Analysis of incomplete IGH D-J showed 34% (17/50) and 24% (12/50) rates of positive clonality for DH1-6-JH and DH7-JH, respectively. In the 4% (2/50) of cases was no detected any gene rearrangements in both of IGH and incomplete IGH D-J genes. CONCLUSIONS: Analysis of molecular clonality gene rearrangements on FFPE tissues disclosed that using BIOMED-2 protocols, could be improvement significant clinicopathological diagnosis of DLBCL. Clonality testing is believable that to suggest as a helpful and credible technique for clonality detection in the routine diagnosis of DLBCL and other lymphoproliferative disorders.