title: Bcl-6 and c-Myc are rarely co-expressed in adult diffuse large B-cell lymphoma.
abstract: Bcl-6 is expressed in germinal centre derived B-cell non-Hodgkin lymphomas including diffuse large B-cell lymphoma (DLBCL) and is likely to play a major role in driving proliferation of a subset of DLBCLs, especially those of germinal centre B-cell subtype, but the role of c-Myc, which is important for proliferation in various lineages is not known. We used the highly standardised staining conditions of a tissue microarray to characterise co-expression of c-Myc and Bcl-6 in DLBCL. We carried out immunohistochemistry of 73 arrayed cases. The majority (62/73) did not express c-Myc, but 11 cases (15%) showed nuclear staining. 5/53 (9%) of Bcl-6 expressing cases co-expressed c-Myc, whereas a much higher proportion, 6/20 (30%), of Bcl-6 negative cases were positive for c-Myc. Overall survival of c-Myc expressing cases was the same as those that had absent expression. There was no significant correlation between c-Myc expression and DLBCL subtype (germinal centre or non-germinal centre subtypes).
authors: Department of Haematology, Division of Investigative Sciences, Imperial College London, Hammersmith Hospital, Du Cna Road, London W12 0NN, UK.
authors: Simon D
authors: SD
authors: Wagner
authors: Furrat
authors: F
authors: Amen
authors: Pritesh S
authors: PS
authors: Trivedi
authors: Donna
authors: D
authors: Horncastle
authors: Kay
authors: K
authors: Elderfield
authors: Kikkeri N
authors: KN
authors: Naresh
mesh_terms: D000328:Adult; D018858:Germinal Center / Q000378:metabolism* / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D016393:Lymphoma, B-Cell / Q000378:metabolism* / Q000473:pathology; D016403:Lymphoma, Large B-Cell, Diffuse / Q000378:metabolism* / Q000473:pathology; D051560:Proto-Oncogene Proteins c-bcl-6 / Q000378:metabolism*; D016271:Proto-Oncogene Proteins c-myc / Q000378:metabolism*; D046888:Tissue Array Analysis
chemical_list: D051560:Proto-Oncogene Proteins c-bcl-6; D016271:Proto-Oncogene Proteins c-myc