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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Biol+Chem
2016 ; 291
(27
): 14356-14362
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Reprogramming Nurse-like Cells with Interferon ? to Interrupt Chronic Lymphocytic
Leukemia Cell Survival
#MMPMID27226587
Gautam S
; Fatehchand K
; Elavazhagan S
; Reader BF
; Ren L
; Mo X
; Byrd JC
; Tridandapani S
; Butchar JP
J Biol Chem
2016[Jul]; 291
(27
): 14356-14362
PMID27226587
show ga
Nurse-like cells (NLCs) play a central role in chronic lymphocytic leukemia (CLL)
because they promote the survival and proliferation of CLL cells. NLCs are
derived from the monocyte lineage and are driven toward their phenotype via
contact-dependent and -independent signals from CLL cells. Because of the central
role of NLCs in promoting disease, new strategies to eliminate or reprogram them
are needed. Successful reprogramming may be of extra benefit because NLCs express
Fc? receptors (Fc?Rs) and thus could act as effector cells within the context of
antibody therapy. IFN? is known to promote the polarization of macrophages toward
an M1-like state that is no longer tumor-supportive. In an effort to reprogram
the phenotype of NLCs, we found that IFN? up-regulated the M1-related markers
CD86 and HLA-DR as well as Fc?RIa. This corresponded to enhanced Fc?R-mediated
cytokine production as well as rituximab-mediated phagocytosis of CLL cells. In
addition, IFN? down-regulated the expression of CD31, resulting in withdrawal of
the survival advantage on CLL cells. These results suggest that IFN? can
re-educate NLCs and shift them toward an effector-like state and that therapies
promoting local IFN? production may be effective adjuvants for antibody therapy
in CLL.