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Influence of human anti-lipopolysaccharide immunoglobulins on tissue distribution and clearance of lipopolysaccharide in rats
Nys, Monique; Damas, Jacques; Damas, Pierre et al.
1999In Medical Microbiology and Immunology, 188 (2), p. 65-71
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Abstract :
[en] To examine the influence of passive immunization on the biological fate of injected lipopolysaccharide (LPS), we used a human IgG preparation (anti-LPS IgG) rich in antibodies to a large panel of smooth and rough purified LPS extracts as well as a normal IgG preparation (standard IgG). Our approach was to compare the uptake of 125I-labeled LPS by the tissues of saline or IgG-treated rats. After intravenous injection, one fraction of 125I-labeled Escherichia coli O55:B5 LPS is rapidly taken up by tissues, while another fraction remained in the blood. Uptake of 125I-labeled LPS was principally observed into the liver and spleen. In rats treated prophylactically with standard IgG, these tissues accumulated significantly larger amount of LPS than the tissues of rats treated with anti-LPS IgG. Nevertheless, both IgG preparations increased the specific binding of LPS by the liver and spleen. High levels of homologous unlabeled LPS decreased the uptake of LPS by the liver, presumably by occupying tissue receptors, whereas in the presence of E. coli O127:B8 LPS, an increase of the uptake of 125I-labeled LPS by the liver and lungs was observed. The pharmacokinetics and tissue distribution of LPS-IgG complexes pre-formed in vitro were compared. In the presence of standard IgG, a unexpected increase of the uptake of LPS by the tissues was recorded, whereas LPS-anti-LPS IgG complexes decreased the binding of 125I-labeled LPS to the tissues. On the other hand, the vascular effects induced by LPS did not appear to be modified in rats pretreated with either IgG preparation. In conclusion, although passive immunization against LPS slightly modified the uptake and clearance of LPS, neither in vitro nor in vivo formation of LPS-anti-LPS IgG complexes afforded a very significant protection against the toxic effects of LPS.
Disciplines :
Anesthesia & intensive care
Author, co-author :
Nys, Monique ;  Centre Hospitalier Universitaire de Liège - CHU > Soins intensifs
Damas, Jacques ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Département des sciences biomédicales et précliniques
Damas, Pierre ;  Université de Liège - ULiège > Soins intensifs
Laub, R.
Lamy, Maurice ;  Université de Liège - ULiège > Département des sciences cliniques > Anesthésie et réanimation
Language :
English
Title :
Influence of human anti-lipopolysaccharide immunoglobulins on tissue distribution and clearance of lipopolysaccharide in rats
Publication date :
November 1999
Journal title :
Medical Microbiology and Immunology
ISSN :
0300-8584
eISSN :
1432-1831
Publisher :
Springer, Germany
Volume :
188
Issue :
2
Pages :
65-71
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 February 2011

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