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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 Clin+Transl+Immunology
2015 ; 4
(10
): e42
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Immunological evidence and regulatory potential for cell-penetrating antibodies
in intravenous immunoglobulin
#MMPMID26682050
Sali AD
; Karakasiliotis I
; Evangelidou M
; Avrameas S
; Lymberi P
Clin Transl Immunology
2015[Oct]; 4
(10
): e42
PMID26682050
show ga
Anti-DNA cell-penetrating autoantibodies have been extensively studied in
autoimmune but not in normal sera. We investigated herein the presence and
properties of cell-penetrating antibodies (CPAbs) in intravenous immunoglobulin
(IVIg), a blood product of pooled normal human IgG. IVIg cell penetration was
observed into various cell lines, as well as cells from several organs of mice
injected intravenously with IVIg therapeutic dose. In all cell types examined in
vitro and in vivo, intracellular IgG localized in the cytoplasm, in contrast to
the nuclear accumulation of disease-related CPAbs. IVIg was found to rapidly
enter cells via an energy-independent mode. The CPAb-fraction was isolated and
found to be polyreactive to nuclear and cytoplasmic components; although it
corresponded to ~2% of IVIg, it accounted for its inhibitory effect on splenocyte
activation. Investigation of IVIg cell penetration capacity provides insight into
its mechanisms of action and may account for some of its beneficial effects in
numerous diseases.