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2014 ; 143
(2
): 300-9
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Fc receptor is not required for inducing antibodies but plays a critical role in
conferring protection after influenza M2 vaccination
#MMPMID24773389
Lee YN
; Lee YT
; Kim MC
; Hwang HS
; Lee JS
; Kim KH
; Kang SM
Immunology
2014[Oct]; 143
(2
): 300-9
PMID24773389
show ga
The ectodomain of matrix protein 2 (M2e) of influenza virus is considered a
rational target for a universal influenza A vaccine. To better understand M2e
immune-mediated protection, Fc receptor common ? chain deficient (FcR?(-/-) ) and
wild-type mice were immunized with a tandem repeat of M2e presented on virus-like
particles (M2e5x VLP). Levels of M2e-specific antibodies that were induced in
FcR?(-/-) mice after immunization with M2e5x VLP were similar to those in
wild-type mice. In addition, M2e antibodies induced in FcR?(-/-) mice were found
to be equally protective as those induced in wild-type mice. However, M2e5x
VLP-immunized FcR?(-/-) mice were not well protected, as shown by severe weight
loss, higher lung viral titres and interleukin-6 inflammatory cytokine production
upon influenza virus challenge compared with M2e5x VLP-immunized wild-type mice.
Importantly, FcR?(-/-) mice that were immunized with inactivated influenza virus
induced haemagglutination inhibition activity and were well protected without a
significant weight loss. Interestingly, interferon-?-producing CD4 T and CD8 T
cells were found to be prevalent in lungs from M2e5x VLP-immunized FcR?(-/-)
mice, which appeared to be correlated with a faster recovery after infection.
These results indicate that Fc receptors play a primary role in conferring
M2e-specific antibody-mediated protection whereas T cells may contribute to the
recovery at later stages of infection.