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J. Biol. Chem., Vol. 276, Issue 12, 8820-8824, March 23, 2001
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From the Septic shock is the most common cause of
death in intensive care units and no effective treatment is available
at present. Lipopolysaccharide (LPS) is the primary mediator of
Gram-negative sepsis by inducing the production of macrophage-derived
cytokines. Previously, we showed that apolipoprotein E (apoE), an
established modulator of lipid metabolism, can bind LPS, thereby
redirecting LPS from macrophages to hepatocytes in vivo. We
now report that intravenously administered LPS strongly increases the
serum levels of apoE. In addition, apoE can prevent the LPS-induced
production of cytokines and subsequent death in rodents. Finally,
apoE-deficient mice show a significantly higher sensitivity toward LPS
than control wild-type mice. These findings indicate that apoE
may have a physiological role in the protection against sepsis, and
recombinant apoE may be used therapeutically to protect against
LPS-induced endotoxemia.
Apolipoprotein E Protects Against Bacterial
Lipopolysaccharide-induced Lethality
A NEW THERAPEUTIC APPROACH TO TREAT GRAM-NEGATIVE SEPSIS*
§¶,
§,
,
,
,
,
, and

Division of Biopharmaceutics,
Leiden/Amsterdam Center for Drug Research, University of Leiden,
Sylvius Laboratories, P. O. Box 9503, 2300 RA Leiden, The Netherlands;
the
Research Institute Neurosciences Vrije Universiteit, Faculty
of Medicine, Department of Pharmacology, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands; and ** Bio-Technology General Ltd.,
Kiryat Weizmann, Rehovot 76326, Israel
*
This work was supported by Medical Sciences Grant 902-23-139 from The Netherlands Organization for Scientific Research, Council for
Medical Research.The costs of publication of this
article were defrayed in part by the
payment of page charges. The article must therefore be hereby marked
"advertisement" in
accordance with 18 U.S.C. Section
1734 solely to indicate this fact.

To whom correspondence should be addressed. Tel.: 31 715276040;
Fax: 31 715276032; E-mail: j.kuiper@lacdr.leidenuniv.nl.
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