Abstract:
:Nodular lymphocyte predominant Hodgkin lymphoma (NLPHL)-a subtype of Hodgkin lymphoma (HL)-is characterized by a low content of tumor cells, the lymphocyte predominant (LP) cells. Transformation into diffuse large B-cell lymphoma (DLBCL) occurs in about 10% of patients. We performed whole-genome mutation analysis of the DLBCL components from two composite lymphomas consisting of clonally related NLPHL and DLBCL as a means to identify candidate tumor suppressor genes and oncogenes in NLPHL. The analysis of LP cells for selected mutations of the DLBCL revealed that most mutations are also present in the LP cells, indicating a close relationship between the two components. The analysis of 62 selected genes in NLPHL by targeted ultra-deep sequencing revealed three novel highly recurrently mutated genes (each mutated in ~50% of cases), that is, DUSP2, SGK1 and JUNB. SGK1 was expressed in the LP cells of primary NLPHL cases and in the NLPHL cell line DEV. Administration of an SGK1 inhibitor induced apoptosis in the NLPHL cell line DEV and the DLBCL cell line Farage, suggesting a pathogenetic role of SGK1 in the LP and DLBCL cells. In summary, the present study identifies SGK1, DUSP2 and JUNB as novel key players in the pathogenesis of NLPHL.
journal_name
Leukemiajournal_title
Leukemiaauthors
Hartmann S,Schuhmacher B,Rausch T,Fuller L,Döring C,Weniger M,Lollies A,Weiser C,Thurner L,Rengstl B,Brunnberg U,Vornanen M,Pfreundschuh M,Benes V,Küppers R,Newrzela S,Hansmann MLdoi
10.1038/leu.2015.328subject
Has Abstractpub_date
2016-04-01 00:00:00pages
844-53issue
4eissn
0887-6924issn
1476-5551pii
leu2015328journal_volume
30pub_type
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