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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+Clin+Cell+Immunol
2016 ; 7
(5
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
TIR-Domain-Containing Adapter-Inducing Interferon-? (TRIF) Regulates CXCR5+ T
helper Cells in the Intestine
#MMPMID27853628
Kanagavelu S
; Flores C
; Hagiwara S
; Ruiz J
; Hyun J
; Cho EE
; Sun F
; Romero L
; Shih DQ
; Fukata M
J Clin Cell Immunol
2016[Oct]; 7
(5
): ä PMID27853628
show ga
OBJECTIVE: Establishing an effective humoral immunity is an important host
defense mechanism in intestinal mucosa. T follicular helper (Tfh) cells are a
spectrum of CXCR5 expressing T helper cells that induce antigen-specific B cell
differentiation. Because the differentiation of T helper cells is largely
regulated by innate immunity, we addressed whether TRIF signaling regulates Tfh
cell differentiation and its ability to trigger humoral immune responses in the
intestine. METHOD: CD4(+)CXCR5(+) T cells, B cells, and plasma cells in the
Peyer's patches (PPs) of WT and TRIF-deficient (Trif(LPS2)) mice were analyzed by
flow cytometry at the baseline, 9 days post primary infection, and 7 days
post-secondary infection with Y. enterocolitica. Y. enterocolitica-specific
CD4(+)CXCR5(+) T cells were generated in vitro by co-culturing peritoneal
macrophages with splenic naïve T cells in the presence of Y. enterocolitica
lysate. WT and Trif(LPS2) mice received CD4(+)CXCR5(+) T cells isolated either
from Y. enterocolitica-primed WT mice or generated in vitro. These mice were
infected with Y. enterocolitica and followed up to 4 weeks. Y.
enterocolitica-specific IgA and IgG were measured in stool and serum samples,
respectively. RESULTS: At baseline, CD4(+)CXCR5(+) T cell proportion was higher
but the proportion of B cells and plasma cells was lower in the PPs of Trif(LPS2)
mice compared to WT mice. After infection, the proportion of plasma cells also
became higher in the PPs of Trif(LPS2) mice compared to WT mice. Corresponding
increase of Y. enterocolitica-specific stool IgA but not serum IgG was found in
Trif(LPS2) mice compared to WT mice. Both in vivo isolated and in vitro generated
CD4(+)CXCR5(+) T cells induced protective immunity against Y. enterocolitica
infection. CONCLUSION: Our results reveal a novel role of TRIF in the regulation
of humoral immunity in the intestine that can be utilized as a basis for a unique
vaccine strategy.