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2014 ; 7
(5
): 2319-23
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Overexpression of IL-9 induced by STAT6 activation promotes the pathogenesis of
chronic lymphocytic leukemia
#MMPMID24966942
Chen N
; Lu K
; Li P
; Lv X
; Wang X
Int J Clin Exp Pathol
2014[]; 7
(5
): 2319-23
PMID24966942
show ga
Chronic lymphocytic leukemia (CLL) is a common leukemia in adults, but its
pathogenesis is still poorly understood. Recently, extensive evidence suggests
that the malignant cells of CLL patients secrete a range of cytoprotective
cytokines including interleukin-4 (IL-4). IL-4 induced the rapid
phosphorylation(p) and activation of the signal transducer and activator of
transcription (STAT)-6 transcription factor in CLL cells in vitro. Interleukin-9
(IL-9) is not expressed by Th2 and Th9 cells in the absence of STAT6 expression.
To elucidate whether there was a function link between IL-9 and STAT6 in CLL,
MEC-1 cells were analyzed using RT-PCR, and western blot. Interestingly, when
added with recombinant human IL-4 (rIL-4) in culturing MEC-1 cells, expressions
of p-STAT6 and IL-9 in MEC-1 cells increased at a time-dependent manner and their
expressions could be inhibited by STAT6 inhibitor. Our data indicated that the
upregulation of IL-9 induced by pSTAT6 may be involved in the pathogenesis of
CLL.