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ORIGINAL ARTICLES |
dem Atayar1,
Anke van den Berg1,
Tjasso Blokzijl1,
Marcel Boot1,
Randy D Gascoyne2,
Lydia Visser1,
Sibrand Poppema1
1 Department of Pathology & Laboratory Medicine, University of Groningen and University Medical Centre Groningen, The Netherlands
2 Department of Pathology, University of British Columbia and British Columbia Cancer Agency, Vancouver, BC, Canada
Correspondence to:
Professor Sibrand Poppema, Department of Pathology & Laboratory Medicine, University Medical Centre Groningen, Hanzeplein 1, PO Box 30.001, 9700 RB Groningen The Netherlands; s.poppema{at}rvb.umcg.nl
Background: Hodgkins lymphoma (HL) is characterised by an ineffective immune response that is predominantly mediated by CD4+ T-cells.
Aims: To analyse the expression of the key regulatory T-cell transcription factors (TFs) in the T-cells of HL involved tissues in order to assess the nature of the TH immune response in HL.
Methods and results: By immunohistochemistry, GATA3 was strongly and T-bet exclusively expressed in a subset of interfollicular lymphocytes in the reactive lymphoid tissues. In classical HL (CHL), which is generally located in the interfollicular zones, a predominance of T-bet+ T-cells and lesser amounts of GATA3+ and c-Maf+ T-cells was found, concordant with the pattern of the normal interfollicular compartment. In reactive lymphoid tissues, c-Maf was observed mostly in T-lymphocytes within the germinal centres (GCs). Nodular lymphocyte predominance type of Hodgkins lymphoma (NLPHL) and progressively transformed germinal centres cases, showed a majority of c-Maf+ T-cells, consistent with the pattern in normal GCs. NLPHL cases uniformly showed c-Maf+/CD57+ T-cell rosettes around the neoplastic cells; these rosettes were absent in "paragranuloma-type" T-cell/histiocyte rich B-cell lymphoma.
Conclusions: T-cell TF expression profiles of the reactive T-cells in both subtypes of HL are in accordance with the expression profile observed in the distinct lymphoid compartments.
Abbreviations: CHL, classical Hodgkins lymphoma; GC, germinal centre; HL, Hodgkins lymphoma; HRBCL, histiocyte rich B-cell lymphoma; HRS, Hodgkin and Reed–Sternberg; L&H, lymphocytic and/or histiocytic; NLPHL, nodular lymphocyte predominance type of Hodgkins lymphoma; PTGC, progressively transformed germinal centre; TF, transcription factor; TH, T-helper
Keywords: Hodgkins lymphoma; nodular lymphocyte predominance type of Hodgkins lymphoma; progressive transformation of germinal centres; T-cell transcription factors; T-helper cells
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