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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 Front+Immunol
2017 ; 8
(ä): 1093
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Targeted Delivery of Neutralizing Anti-C5 Antibody to Renal Endothelium Prevents
Complement-Dependent Tissue Damage
#MMPMID28932227
Durigutto P
; Sblattero D
; Biffi S
; De Maso L
; Garrovo C
; Baj G
; Colombo F
; Fischetti F
; Di Naro AF
; Tedesco F
; Macor P
Front Immunol
2017[]; 8
(ä): 1093
PMID28932227
show ga
Complement activation is largely implicated in the pathogenesis of several
clinical conditions and its therapeutic neutralization has proven effective in
preventing tissue and organ damage. A problem that still needs to be solved in
the therapeutic control of complement-mediated diseases is how to avoid side
effects associated with chronic neutralization of the complement system, in
particular, the increased risk of infections. We addressed this issue developing
a strategy based on the preferential delivery of a C5 complement inhibitor to the
organ involved in the pathologic process. To this end, we generated Ergidina, a
neutralizing recombinant anti-C5 human antibody coupled with a cyclic-RGD
peptide, with a distinctive homing property for ischemic endothelial cells and
effective in controlling tissue damage in a rat model of renal
ischemia/reperfusion injury (IRI). As a result of its preferential localization
on renal endothelium, the molecule induced complete inhibition of complement
activation at tissue level, and local protection from complement-mediated tissue
damage without affecting circulating C5. The ex vivo binding of Ergidina to
surgically removed kidney exposed to cold ischemia supports its therapeutic use
to prevent posttransplant IRI leading to delay of graft function. Moreover, the
finding that the ex vivo binding of Ergidina was not restricted to the kidney,
but was also seen on ischemic heart, suggests that this RGD-targeted anti-C5
antibody may represent a useful tool to treat organs prior to transplantation.
Based on this evidence, we propose preliminary data showing that Ergidina is a
novel targeted drug to prevent complement activation on the endothelium of
ischemic kidney.