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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+Biomed+Sci
2018 ; 25
(1
): 56
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IL-33 receptor (ST2) deficiency downregulates myeloid precursors, inflammatory NK
and dendritic cells in early phase of sepsis
#MMPMID30001716
Babic ZM
; Zunic FZ
; Pantic JM
; Radosavljevic GD
; Jovanovic IP
; Arsenijevic NN
; Lukic ML
J Biomed Sci
2018[Jul]; 25
(1
): 56
PMID30001716
show ga
BACKGROUND: Sepsis is a life-threatening disease mediated by profound
disturbances in systemic inflammatory response to infection. IL-33 is
multifunctional regulator of numerous aspects of innate and adaptive immune
response. The aim of this article was to further evaluate the role of IL-33
receptor (ST2) in different pathways of innate immunity during early
polymicrobial sepsis. METHODS: Polymicrobial sepsis was induced using cecal
ligation and puncture (CLP) model in ST2 deficient (ST2(-/-)) and wild type
BALB/c mice. Peritoneal and spleen cells were isolated for further phenotyping.
Apoptosis was determined by immunohistochemistry and flow cytometry. RESULTS:
Deletion of ST2 leads to increased susceptibility to early manifestations of
sepsis as evaluated by clinical signs and survival. These are accompanied by
decrease in the total number of neutrophils, eosinophils and mast cells in
peritoneal cavity 12 h after CLP. In early sepsis there was also low number of
precursors of myeloid cells in particular CD11b(+)Ly6G(+)Ly6C(low) cells in
spleen of ST2(-/-) mice. Although the number of NK cells in the spleen was
similar, there were significant differences in the presence of inflammatory IFN-?
and IL-17 producing NK cells. Further, ST2 deletion affects the phenotype and
maturation of dendritic cell in sepsis. The total number of dendritic cells in
the spleen was lower as well as IL-12 expressing dendritic cells. Finally, there
was higher frequency of active caspase-3 positive and early apoptotic cells, in
particular CD11c positive cells, in spleen of septic ST2(-/-) mice. CONCLUSION:
Taken together, our data provide the evidence that ST2 deficiency in early phase
of sepsis downregulates myeloid precursors, inflammatory NK and dendritic cells.