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2016 ; 6
(ä): 26494
Nephropedia Template TP
gab.com Text
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English Wikipedia
ICOS(+)PD-1(+)CXCR3(+) T follicular helper cells contribute to the generation of
high-avidity antibodies following influenza vaccination
#MMPMID27231124
Bentebibel SE
; Khurana S
; Schmitt N
; Kurup P
; Mueller C
; Obermoser G
; Palucka AK
; Albrecht RA
; Garcia-Sastre A
; Golding H
; Ueno H
Sci Rep
2016[May]; 6
(ä): 26494
PMID27231124
show ga
The immune mechanism leading to the generation of protective antibody responses
following influenza trivalent inactivated vaccine (TIV) vaccinations remains
largely uncharacterized. We recently reported that TIV vaccination induced a
transient increase of circulating ICOS(+)PD-1(+)CXCR3(+) T follicular helper
(cTfh) cells in blood, which positively correlated with the induction of
protective antibody responses measured at day 28. However, whether and how these
T cells directly contribute to antibody response remains unclear. In this study,
we analyzed the changes after TIV vaccination in the amount and the avidity of
the polyclonal antibodies specific for the HA1 subunit of the pandemic H1N1
virus, and analyzed the correlation with the increase of ICOS(+)PD-1(+)CXCR3(+)
cTfh cells. We found that both the amount and the avidity of specific antibodies
rapidly increased during the first 7 days after TIV. Importantly, the increase of
ICOS(+)PD-1(+)CXCR3(+) cTfh cells strongly correlated with the increase in the
avidity of antibodies, particularly in subjects who did not have high affinity
antibodies at baseline. We propose that ICOS(+)PD-1(+)CXCR3(+) Tfh cells directly
contribute to the generation of high-avidity antibodies after TIV vaccinations by
selectively interacting with high affinity B cells at extrafollicular sites.