Interaction between human platelets and platelet plasma membrane with apparent bacterial endotoxin was studied in vitro attempts at repair, pseudopod formation, with transmission and scanning electron and centralization of platelet organdIes. microscopy. Washed human platelets, Copper appeared to potentiate these phewhose aggregation was blocked with nomena, since neither Cu2+ at low concenapyr...

Escherichia coli endotoxin (lipopolysaccharide) was shown to increase glycogenolysis in the perfused liver 2-3-fold. In isolated parenchymal liver cells, however, endotoxin did not influence glycogenolysis, whereas stimulation by endotoxin of glycogenolysis in the perfused liver could be blocked by aspirin. This suggests that the effect of endotoxin on liver glycogenolysis is mediated by eicosa...

Endotoxin contamination of protein solutions was reduced by a phase separation technique using the detergent, Triton X-114. Protein solutions containing endotoxin were treated with Triton X-114 on ice. The solution was then warmed to 37 degrees C, whereupon two phases formed. The Triton X-114 phase, containing the endotoxin, was precipitated by centrifugation. The first cycle of phase separatio...

septicaemia caused by gram-negative pathogens is a dangerous infection which is associated with high incidence of liver dysfunction. the severe and acute hepatotoxicity is presumably due to massive release of endotoxin into systemic circulation after bacterial killing. the direct toxic effect of endotoxin is probably due to the increased production of reactive oxygen intermediates as o 2 - , pe...

Endotoxin induces many profound vascular effects, including venous pooling, changes in resistance to blood flow in many organs, and circulatory collapse leading to death. Prominent among the early vascular effects of endotoxin is the rapid development of hepatic and intestinal congestion (2-4). One apparent mechanism of splanchnic blood pooling in endotoxin shock is hepatic venoconstriction. Li...

In experimental animals and humans, intravenous (i.v.) injection of endotoxin induces large increases in circulating plasminogen activator inhibitor type-1 (PAI-1), a major inhibitor of blood fibrinolysis. A similar increase is seen after the injection of interleukin-1 (IL-1) or of tumor necrosis factor-alpha (TNF-alpha), suggesting that these cytokines mediate the induction, by endotoxin, of P...

Rifkind, David (University of Colorado Medical Center, Denver), and John D. Palmer. Neutralization of endotoxin toxicity in chick embryos by antibiotics. J. Bacteriol. 92:815-819. 1966.-Three cationic cyclic polypeptide antibiotics, polymyxin B sulfate colistin sulfate, and tyrocidine hydrochloride, were shown to neutralize endotoxin lethality in chick embryos. The neutralizing potency of these...

Applicability of the endotoxin test to diphtheria-tetanus-acellular pertussis combined (DTaP) vaccines was examined. We found some DTaP vaccines that strongly interfered with Limulus amoebocyte lysate (LAL) activity of endotoxin without affecting lethal activity of endotoxin in D-galactosamine-treated mice. LAL activity that was interfered in such vaccines increased apparently after the treatme...

The supernatants taken from Pseudomonas aeruginosa and Escherichia coli cultures in human sera or chemically defined M9 medium in the presence of ceftazidime (CAZ) contained high levels of endotoxin, while those taken from the same cultures in the presence of imipenem (IPM) yielded a very low level of endotoxin. The biological activities of endotoxin in the supernatants were compared with those...