Lipopolysaccharide Infusion as a Porcine Endotoxemic Shock Model
December 8th, 2023
We provide a protocol for an experimental endotoxemic shock model in pigs by infusion of lipopolysaccharide.
With this protocol, we induce experimental endotoxemic shock in pigs. We were able to reliably cause symptoms of endotoxemia, such as hemodynamic instability and respiratory failure. Lipopolysaccharide is a toxic substance.
When working with lipopolysaccharide, it is essential always to wear gloves, protective goggles, a mask, and a lab coat. This protocol provides an easy and reliable way to induce endotoxemia. Because of their similar anatomy and physiology, pigs are particularly well-suited for this kind of research as standard medical equipment may be used.
Using this protocol, we will be able to study the effects of different ventilation strategies in respiratory failure and lung damage during endotoxemic shock.
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Overview
This protocol describes the induction of experimental endotoxemic shock in pigs through the infusion of lipopolysaccharide. The model reliably produces symptoms such as hemodynamic instability and respiratory failure, making it suitable for research.
Key Study Components
Area of Science
- Neuroscience
- Biology
- Experimental Medicine
Background
- Endotoxemia is a serious condition characterized by systemic inflammation.
- Pigs are often used in research due to their anatomical and physiological similarities to humans.
- Understanding endotoxemia can help in developing treatments for related conditions.
- Safety precautions are crucial when handling lipopolysaccharide.
Purpose of Study
- To establish a reliable model of endotoxemic shock in pigs.
- To study the physiological responses to endotoxemia.
- To facilitate research into potential therapeutic interventions.
Methods Used
- Infusion of lipopolysaccharide to induce shock.
- Monitoring of hemodynamic and respiratory parameters.
- Use of standard medical equipment for assessment.
- Implementation of safety measures during the procedure.
Main Results
- Successful induction of endotoxemic shock with observable symptoms.
- Demonstrated hemodynamic instability in the subjects.
- Respiratory failure was reliably observed following treatment.
- Protocol proved to be straightforward and reproducible.
Conclusions
- The protocol provides a valuable tool for studying endotoxemia.
- Pigs serve as an effective model for human-related research.
- Future studies can build on this model to explore therapeutic options.
Frequently Asked Questions
Executive Industry Relevance
Reliable porcine endotoxemic shock models are critical for translational research on sepsis pathophysiology and therapeutic evaluation. This protocol enables reproducible induction of clinically relevant shock states, supporting predictive confidence in preclinical studies. The model's physiological fidelity to human sepsis enhances its value for portfolio triage and mechanistic de-risking in early-stage drug development.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Enables interrogation of immune and hemodynamic pathways implicated in septic shock.
- Supports biological de-risking by modeling human-relevant systemic responses.
- Facilitates functional target validation for anti-inflammatory and organ-supportive interventions.
Screening & Assay Development
- Provides a standardized in vivo system for evaluating candidate therapeutics under controlled endotoxemic conditions.
- Supports reproducible measurement of hemodynamic and respiratory endpoints for quantitative assessment.
- Enables assay standardization for cross-study and cross-team comparability.
Translational & Preclinical Research
- Aligns with disease-relevant endpoints observed in human sepsis, such as respiratory failure and acidosis.
- Supports continuity from discovery through preclinical validation of new interventions.
- Enables risk-adjusted advancement decisions based on translationally predictive data.
Pipeline & Workflow Integration
This porcine model integrates into the preclinical workflow from early discovery through lead identification and translational research.
- Discovery Biology: Facilitates hypothesis testing on immune dysregulation and organ dysfunction mechanisms.
- Screening: Provides a platform for quantitative evaluation of therapeutic efficacy and safety in a complex biological system.
- Analytics: Enables collection of hemodynamic, respiratory, and metabolic readouts for robust statistical comparison.
- Translational Research: Bridges preclinical findings to clinical relevance by modeling human-like responses.
- Enterprise Reuse: Offers a reusable, standardized model for ongoing and future sepsis-related R&D initiatives.
Operational & Enterprise Impact
- Scientific Value: Increases predictive confidence and reduces mechanistic ambiguity in sepsis research.
- Operational Value: Delivers reproducibility and standardization across studies and teams.
- Strategic Value: Informs go/no-go decisions and optimizes resource allocation in early development.
- Portfolio Impact: Supports risk-adjusted prioritization of sepsis and shock-related therapeutic programs.
Implementation Considerations
- Requires expertise in large animal handling and critical care monitoring.
- Demands access to standard medical equipment and analytical infrastructure for physiological measurements.
- Necessitates cross-team standardization of protocols and endpoints for comparability.
- Adaptation may be needed for specific therapeutic classes or mechanistic studies.
- Safety protocols for handling lipopolysaccharide are essential to ensure operator protection.
Biopharma FAQs
Chapters in this video
0:00
Introduction
0:59
Instrumentation and Monitoring Techniques in Femoral Vascular Access for Hemodynamic Assessment in a Porcine Model
3:36
Shock Induction and Treatment of Hemodynamic Instability in a Porcine Model Using LPS Infusion and PiCCO Monitoring
