Related Experiment Video
Updated: Jan 13, 2026
Studying the Effects of Tumor-Secreted Paracrine Ligands on Macrophage Activation using Co-Culture with Permeable Membrane Supports
Published on: November 28, 2019
Microbial-Derived Metabolites and Their Impact on Cancer Immunotherapy
Jessica Jeong1, Kelly J Baines2, Saman Maleki Vareki2,3,4,5,6
1Department of Biochemistry, Western University, London, Canada.
Abstract:
The gut microbiome has emerged as a modulator of both cancer progression and patient responses to therapies like immune checkpoint inhibitors (ICI). Recent evidence highlights microbially derived metabolites as key regulators of immune response and tumor microenvironment dynamics. This review explores the role of four prominent classes of bacterial metabolites-inosine, indole, bile acids, and short-chain fatty acids-in shaping antitumor immunity and modulating ICI efficacy. Each of these metabolites and their derivatives demonstrate complex and context-dependent effects on immune cells. The duality of exerting both pro- and anti-inflammatory effects underscores the therapeutic potential and challenges of metabolite-targeted interventions. By examining current preclinical findings and ongoing clinical trials, we identify promising avenues for enhancing immunotherapy through microbiome modulation and call for further mechanistic insights to inform precision treatment strategies.
Insights
The gut microbiome influences cancer treatment. Bacterial metabolites like inosine and indole can impact immune responses and effectiveness of therapies such as immune checkpoint inhibitors (ICI).
Area of Science:
- Immunology
- Oncology
- Microbiome research
Background:
- The gut microbiome significantly impacts cancer progression and response to immunotherapies.
- Microbially derived metabolites are increasingly recognized as critical regulators of the tumor immune microenvironment.
Purpose of the Study:
- To review the role of prominent bacterial metabolites in antitumor immunity.
- To explore how these metabolites modulate the efficacy of immune checkpoint inhibitors (ICI).
Main Methods:
- Literature review of preclinical findings.
- Analysis of ongoing clinical trials.
- Examination of the immunomodulatory effects of specific metabolites.
Main Results:
- Four key metabolite classes (inosine, indole, bile acids, SCFAs) have complex, context-dependent effects on immune cells.
- These metabolites can exert both pro- and anti-inflammatory actions.
- Their influence on antitumor immunity and ICI efficacy is multifaceted.
Conclusions:
- Metabolite-targeted interventions offer therapeutic potential for enhancing immunotherapy.
- Understanding these microbial metabolites is crucial for developing precision treatment strategies.
- Further mechanistic studies are needed to fully harness microbiome modulation for cancer therapy.
More Related Videos
Related Concept Videos
01:27Tumor Immunotherapy
02:17The Tumor Microenvironment
02:57Targeted Cancer Therapies
There are several types of targeted therapies against...
02:49Cancer Therapies
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
01:29Microorganisms in Medicine and Therapeutics
02:50Combination Therapies and Personalized Medicine
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...