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Related Experiment Video

Updated: May 27, 2026

Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice
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Published on: April 2, 2013

Platelet-endotoxin interaction: a review

N Semeraro, D Fumarola, P Telesforo

    Bollettino Dell'Istituto Sieroterapico Milanese
    |January 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Bacterial endotoxins cause animal platelets to aggregate and release substances, a process likely immune-mediated. In humans, endotoxins also affect platelets, contributing to endotoxemia during sepsis.

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    11:18

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    Published on: April 2, 2013

    Intravenous Endotoxin Challenge in Healthy Humans: An Experimental Platform to Investigate and Modulate Systemic Inflammation
    07:48

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    Published on: May 16, 2016

    Endotoxin Activity Assay for the Detection of Whole Blood Endotoxemia in Critically Ill Patients
    06:28

    Endotoxin Activity Assay for the Detection of Whole Blood Endotoxemia in Critically Ill Patients

    Published on: June 24, 2019

    Area of Science:

    • Immunology
    • Hematology
    • Microbiology

    Background:

    • Bacterial endotoxins are potent stimulators of inflammatory responses.
    • Platelets play a crucial role in hemostasis, inflammation, and immune responses.
    • Endotoxemia, often caused by Gram-negative bacterial infections, can lead to severe clinical manifestations.

    Purpose of the Study:

    • To review the effects of bacterial endotoxins on human and animal platelets.
    • To elucidate the mechanisms underlying endotoxin-platelet interactions.
    • To understand the role of platelets in the pathogenesis of endotoxemia.

    Main Methods:

    • Review of in vivo and in vitro studies on endotoxin-platelet interactions in animals and humans.
    • Analysis of platelet aggregation, serotonin release, platelet factor 3 availability, and procoagulant activity.
    • Examination of the immunological and complement-dependent nature of these interactions.

    Main Results:

    • In animals, endotoxin administration leads to thrombocytopenia, platelet aggregation in blood vessels, serotonin release, and increased platelet factor 3 availability.
    • In vitro, endotoxin aggregates platelets, induces release of vasoactive amines and adenine nucleotides, and activates platelet factor 3.
    • Human studies show thrombocytopenia in endotoxemia, and in vitro experiments reveal endotoxin enhances human platelet procoagulant activity.
    • Animal platelet-endotoxin interactions appear to be immunological and complement-dependent.

    Conclusions:

    • Bacterial endotoxins significantly impact platelet function in both animals and humans.
    • Platelet activation and aggregation are key mechanisms in endotoxin-induced pathology.
    • Platelets are critically involved in the biological effects of endotoxins, particularly in Gram-negative sepsis.