Protein kinase CK2 is widely expressed in follicular, Burkitt and diffuse large B-cell lymphomas and propels malignant B-cell growth

Oncotarget
Marco PizziStefano A Pileri

Abstract

Serine-threonine kinase CK2 is highly expressed and pivotal for survival and proliferation in multiple myeloma, chronic lymphocytic leukemia and mantle cell lymphoma. Here, we investigated the expression of α catalytic and β regulatory CK2 subunits by immunohistochemistry in 57 follicular (FL), 18 Burkitt (BL), 52 diffuse large B-cell (DLBCL) non-Hodgkin lymphomas (NHL) and in normal reactive follicles. In silico evaluation of available Gene Expression Profile (GEP) data sets from patients and Western blot (WB) analysis in NHL cell-lines were also performed. Moreover, the novel, clinical-grade, ATP-competitive CK2-inhibitor CX-4945 (Silmitasertib) was assayed on lymphoma cells. CK2 was detected in 98.4% of cases with a trend towards a stronger CK2α immunostain in BL compared to FL and DLBCL. No significant differences were observed between Germinal Center B (GCB) and non-GCB DLBCL types. GEP data and WB confirmed elevated CK2 mRNA and protein levels as well as active phosphorylation of specific targets in NHL cells. CX-4945 caused a dose-dependent growth-arresting effect on GCB, non-GCB DLBCL and BL cell-lines and it efficiently shut off phosphorylation of NF-κB RelA and CDC37 on CK2 target sites. Thus, CK2 is highly expressed ...Continue Reading

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Nov 12, 2015·BioMed Research International·Giorgio CozzaLorenzo A Pinna
Apr 5, 2016·Oncogene·E MandatoF Piazza
Jan 31, 2017·Pharmaceuticals·Melissa M J ChuaIsabel Dominguez
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May 1, 2021·International Journal of Molecular Sciences·Zaira SpinelloSabrina Manni
Jul 25, 2021·The Journal of Immunology : Official Journal of the American Association of Immunologists·Hairong WeiEtty N Benveniste

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Methods Mentioned

BETA
biopsy
fluorescence activated cell sorting
FCS

Software Mentioned

CellQuest

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