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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 Front+Immunol
2017 ; 8
(ä): 141
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
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English Wikipedia
Human Lymph Node-Derived Fibroblastic and Double-Negative Reticular Cells Alter
Their Chemokines and Cytokines Expression Profile Following Inflammatory Stimuli
#MMPMID28261205
Severino P
; Palomino DT
; Alvarenga H
; Almeida CB
; Pasqualim DC
; Cury A
; Salvalaggio PR
; De Vasconcelos Macedo AL
; Andrade MC
; Aloia T
; Bromberg S
; Rizzo LV
; Rocha FA
; Marti LC
Front Immunol
2017[]; 8
(ä): 141
PMID28261205
show ga
Lymph node (LN) is a secondary lymphoid organ with highly organized and
compartmentalized structure. LNs harbor B, T, and other cells among fibroblastic
reticular cells (FRCs). FRCs are characterized by both podoplanin (PDPN/gp38)
expression and by the lack of CD31 expression. FRCs are involved in several
immune response processes but mechanisms underlying their function are still
under investigation. Double-negative cells (DNCs), another cell population within
LNs, are even less understood. They do not express PDPN or CD31, their
localization within the LN is unknown, and their phenotype and function remain to
be elucidated. This study evaluates the gene expression and cytokines and
chemokines profile of human LN-derived FRCs and DNCs during homeostasis and
following inflammatory stimuli. Cytokines and chemokines secreted by human FRCs
and DNCs partially diverged from those identified in murine models that used
similar stimulation. Cytokine and chemokine secretion and their receptors
expression levels differed between stimulated DNCs and FRCs, with FRCs expressing
a broader range of chemokines. Additionally, dendritic cells demonstrated
increased migration toward FRCs, possibly due to chemokine-induced chemotaxis
since migration was significantly decreased upon neutralization of secreted CCL2
and CCL20. Our study contributes to the understanding of the biology and
functions of FRCs and DNCs and, accordingly, of the mechanisms involving them in
immune cells activation and migration.