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2016 ; 5
(6
): e1160188
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CD137 signaling in Hodgkin and Reed-Sternberg cell lines induces IL-13 secretion,
immune deviation and enhanced growth
#MMPMID27471634
Rajendran S
; Ho WT
; Schwarz H
Oncoimmunology
2016[Jun]; 5
(6
): e1160188
PMID27471634
show ga
CD137 and its ligand, CD137L, are expressed on activated T cells and
antigen-presenting cells (APC), respectively, and are powerful inducers of
cellular, type 1 immune responses. CD137 is ectopically expressed by Hodgkin and
Reed-Sternberg (HRS) cells, the malignant cells in Hodgkin lymphoma (HL). Here we
report that CD137 transmits signals into HRS cells, which induce the secretion of
IL-13. IL-13 in conditioned supernatants of HRS cell lines inhibits the secretion
of IFN? by peripheral blood mononuclear cells (PBMC). Since IFN? is essential for
the development of a type 1 immune response, CD137-induced IL-13 secretion
facilitates escape from immune surveillance. Further, CD137-induced IL-13
enhances the growth of HRS cell lines. CD137, IL-13 double-positive cells could
be detected in the majority (58%) of HL patient samples, providing clinical
evidence for a role of IL-13 induction by CD137 during HL pathogenesis. This
study validates CD137 as a candidate target for immunotherapy of HL.