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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 PLoS+One
2016 ; 11
(10
): e0165047
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English Wikipedia
Hepatitis C virus Broadly Neutralizing Monoclonal Antibodies Isolated 25 Years
after Spontaneous Clearance
#MMPMID27776169
Merat SJ
; Molenkamp R
; Wagner K
; Koekkoek SM
; van de Berg D
; Yasuda E
; Böhne M
; Claassen YB
; Grady BP
; Prins M
; Bakker AQ
; de Jong MD
; Spits H
; Schinkel J
; Beaumont T
PLoS One
2016[]; 11
(10
): e0165047
PMID27776169
show ga
Hepatitis C virus (HCV) is world-wide a major cause of liver related morbidity
and mortality. No vaccine is available to prevent HCV infection. To design an
effective vaccine, understanding immunity against HCV is necessary. The memory B
cell repertoire was characterized from an intravenous drug user who spontaneously
cleared HCV infection 25 years ago. CD27+IgG+ memory B cells were immortalized
using BCL6 and Bcl-xL. These immortalized B cells were used to study
antibody-mediated immunity against the HCV E1E2 glycoproteins. Five E1E2 broadly
reactive antibodies were isolated: 3 antibodies showed potent neutralization of
genotype 1 to 4 using HCV pseudotyped particles, whereas the other 2 antibodies
neutralized genotype 1, 2 and 3 or 1 and 2 only. All antibodies recognized
non-linear epitopes on E2. Finally, except for antibody AT12-011, which
recognized an epitope consisting of antigenic domain C /AR2 and AR5, all other
four antibodies recognized epitope II and domain B. These data show that a
subject, who spontaneously cleared HCV infection 25 years ago, still has
circulating memory B cells that are able to secrete broadly neutralizing
antibodies. Presence of such memory B cells strengthens the argument for
undertaking the development of an HCV vaccine.