Molecular Analysis of Igh and Incomplete Igh D-J Clonality Gene Rearrangements in Hodgkin Lymphoma Malignancies Publisher Pubmed



Ghorbian S¹ ; Jahanzad I² ; Estiar MA³ ; Ziae JE⁴ ; Asvadikermani I⁴ ; Andalib S⁵ ; Javadi GR¹ ; Sakhinia E⁶
Source: Clinical Laboratory Published:2015

Abstract

Background: We evaluated molecular clonality in immunoglobulin heavy chain (IGH) and incomplete IGH D-J genes for improvement of clinical diagnosis of Hodgkin's lymphoma (HL). We applied BIOMED-2 protocols in HL cases, which were previously approved by clonality detection in non-Hodgkin lymphoma (NHL) cases. Methods: We investigated 50 consecutive FFPE samples of classical HL (cHL) patients to assess IGH and IGH D-J clonal gene rearrangements by multiplex PCR protocols, which were provided by the European Biomedicine and Health (BIOMED-2) Concerted Action Project BMH4-CT98-3936. Results: In the present study, there was a monoclonality of 86% (43/50) including a clonality of 74% (37/50) for IGH and a clonality of 42% (21/50) in IGH D-J. In addition, a lack of clonality was detected in 14% (7/50) of cases. Frequent gene rearrangements were detected in framework (FR) HI (54%) and FRII (20%), whereas no clonality was seen in FRI. Furthermore, a monoclonality of 28% and 14% was detected in the DHI-6-JH and DH7-JH gene rearrangements, respectively. Conclusions: The present study suggests that the complete IGH and incomplete IGH D-J clonality gene rearrangement assays using BIOMED-2 protocols could be considered a valuable method for detection of clonal gene rearrangements, especially in HL cases.