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2017 ; 7
(1
): 5165
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English Wikipedia
Free immunoglobulin light chain (FLC) promotes murine colitis and
colitis-associated colon carcinogenesis by activating the inflammasome
#MMPMID28701727
Ma J
; Jiang D
; Gong X
; Shao W
; Zhu Z
; Xu W
; Qiu X
Sci Rep
2017[Jul]; 7
(1
): 5165
PMID28701727
show ga
Numerous studies have demonstrated that free Ig light chain (FLC), a novel
inflammation mediator, participates in many inflammatory diseases by activating
mast cells and extending the survival of neutrophils. However, it remains unclear
whether FLC is involved in colitis and colitis-associated colon carcinogenesis
(CAC). In this study, we found a significant increase in FLC in murine models of
DSS (Dextran Sulfate Sodium Salt)-induced colitis and CAC compared to controls.
Peptide F991, a functional blocker of FLC, significantly attenuated colitis
progression, which included abrogating the development of diarrhea and tumor
burden, elevating survival rate, greatly reducing the infiltration of
inflammatory cells (such as ROS(+) active neutrophils), especially reducing
tumorigenesis in CAC. Furthermore, we demonstrated that F991 inhibited the
activation of the inflammasome by reducing the expression of cleaved caspase-1
and the maturation of IL-1? and IL-18. Altogether, our findings demonstrate that
FLC can promote the pathogenesis of colitis and CAC and may be used as novel
biomarker for the diagnosis of inflammatory bowel disease. Additionally, F991 may
become a potential therapeutic option for colitis or colorectal cancer.