Related Experiment Video
Updated: Mar 29, 2026

Establishment of a Co-culture System of Patient-Derived Colorectal Tumor Organoids and Tumor-Infiltrating Lymphocytes (TILs)
Published on: June 27, 2025
Beating Cancer with a Gut Feeling
Sayeh Gorjifard1, Romina S Goldszmid1
1Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA.
Abstract:
Blockade of immune checkpoint molecules, a group of molecules normally involved in maintaining self-tolerance and limiting T cell responses, has emerged as a breakthrough in cancer therapy. Two recent studies published in Science show that, in mice, gut commensal microbes promote antitumor immunity and may determine therapy efficacy.
Insights
Gut microbes enhance cancer immunity and immunotherapy effectiveness in mice. These findings highlight the role of the gut microbiome in cancer treatment responses.
Area of Science:
- Immunology
- Microbiology
- Oncology
Background:
- Immune checkpoint molecules regulate T cell responses and self-tolerance.
- Blockade of immune checkpoints is a significant advancement in cancer therapy.
- The influence of the gut microbiome on cancer immunity is an emerging area of research.
Purpose of the Study:
- To investigate the role of gut commensal microbes in antitumor immunity.
- To determine if gut microbes influence the efficacy of cancer therapies.
Main Methods:
- Studies were conducted in mouse models.
- The research focused on the interplay between gut commensal microbes and the host immune system.
Main Results:
- Gut commensal microbes were shown to promote antitumor immunity in mice.
- The presence and type of gut microbes were found to correlate with therapy efficacy.
Conclusions:
- Gut microbes play a crucial role in modulating the immune response against cancer.
- Targeting the gut microbiome could be a strategy to improve cancer immunotherapy outcomes.
Related Concept Videos
Tumor Immunotherapy
The Tumor Microenvironment
The Tumor Microenvironment
Functions of the Gut Microbiota
Cancer Vaccines
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
Microorganisms in Medicine and Therapeutics

