Related Experiment Video
Updated: Jul 12, 2025
07:48
Intravenous Endotoxin Challenge in Healthy Humans: An Experimental Platform to Investigate and Modulate Systemic Inflammation
Published on: May 16, 2016
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Endotoxin Tolerance Creates Favourable Conditions for Cancer Development
Konkonika Roy1, Henryk Mikołaj Kozłowski1,2, Tomasz Jędrzejewski1
1Department of Immunology, Faculty of Biology and Veterinary Sciences, Nicolaus Copernicus University, 1 Lwowska Street, 87-100 Torun, Poland.
Cancers
|October 28, 2023
Summary
Endotoxin tolerance (ET) reprograms macrophages, promoting cancer cell growth and motility. This immune adaptation creates a tumor microenvironment conducive to cancer progression, suggesting ET as a therapeutic target.
Area of Science:
- Immunology
- Cancer Biology
- Cellular Biology
Background:
- Endotoxin tolerance (ET) is an immune adaptation protecting against endotoxin exposure.
- ET involves macrophage reprogramming and immunosuppression.
- The impact of ET on the tumor microenvironment and cancer progression is unclear.
Purpose of the Study:
- To investigate if endotoxin tolerance influences cancer progression.
- To determine how endotoxin-tolerant macrophages affect the tumor microenvironment.
Main Methods:
- Endotoxin-tolerant macrophages (MoET) were generated.
- MoET were co-cultured with breast and colon cancer cells or exposed to conditioned media.
- Cancer cell behavior (viability, clonogenicity, motility) was assessed using various assays.
Main Results:
- MoET-derived factors enhanced cancer cell viability, motility, and clonogenicity.
- MoET exhibited M1 polarization despite reduced TNFα and IL-6 levels.
- These findings suggest a pro-tumorigenic microenvironment induced by ET.
Conclusions:
- ET-associated macrophage reprogramming fosters a tumor microenvironment that supports cancer progression.
- Targeting endotoxin tolerance may offer a novel strategy for cancer therapy and prevention.
Keywords:
cancercytokinesendotoxin toleranceimmunosuppressionmacrophage polarization M1/M2pro-cancerogenic conditionstumour microenvironmentMore Related Videos
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