Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 215.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 249.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 249.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 249.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 249.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 249.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 249.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\24825864
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Blood
2014 ; 124
(10
): 1659-68
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Suppression of inhibitor formation against FVIII in a murine model of hemophilia
A by oral delivery of antigens bioencapsulated in plant cells
#MMPMID24825864
Sherman A
; Su J
; Lin S
; Wang X
; Herzog RW
; Daniell H
Blood
2014[Sep]; 124
(10
): 1659-68
PMID24825864
show ga
Hemophilia A is the X-linked bleeding disorder caused by deficiency of
coagulation factor VIII (FVIII). To address serious complications of inhibitory
antibody formation in current replacement therapy, we created tobacco
transplastomic lines expressing FVIII antigens, heavy chain (HC) and C2, fused
with the transmucosal carrier, cholera toxin B subunit. Cholera toxin B-HC and
cholera toxin B-C2 fusion proteins expressed up to 80 or 370 µg/g in fresh
leaves, assembled into pentameric forms, and bound to GM1 receptors. Protection
of FVIII antigen through bioencapsulation in plant cells and oral delivery to the
gut immune system was confirmed by immunostaining. Feeding of HC/C2 mixture
substantially suppressed T helper cell responses and inhibitor formation against
FVIII in mice of 2 different strain backgrounds with hemophilia A. Prolonged oral
delivery was required to control inhibitor formation long-term. Substantial
reduction of inhibitor titers in preimmune mice demonstrated that the protocol
could also reverse inhibitor formation. Gene expression and flow cytometry
analyses showed upregulation of immune suppressive cytokines (transforming growth
factor ? and interleukin 10). Adoptive transfer experiments confirmed an active
suppression mechanism and revealed induction of CD4(+)CD25(+) and CD4(+)CD25(-) T
cells that potently suppressed anti-FVIII formation. In sum, these data support
plant cell-based oral tolerance for suppression of inhibitor formation against
FVIII.