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Updated: Sep 27, 2025

Microfluidic Tools for Probing Fungal-Microbial Interactions at the Cellular Level
Published on: June 23, 2022
Fungus packs a punch in the gut
1Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Abstract:
The impact of intestinal fungi on host physiology and their mechanisms of interaction are incompletely understood. In a recent issue of Cell, Leonardi et al. (2022) showed that mucosal fungi induce intestinal Th17 cells to produce IL-22 and IL-17A. IL-22 acts on the gut epithelium to protect barrier integrity, whereas IL-17 acts on IL-17RA+ neurons to enhance sociability.
Insights
Intestinal fungi influence host physiology by activating specific immune cells. These fungi trigger T helper 17 (Th17) cells to release cytokines that maintain gut barrier function and modulate social behavior.
Area of Science:
- Microbiology
- Immunology
- Neuroscience
Background:
- The role of the gut microbiome, including fungi, in host health is an emerging area of research.
- Mechanisms by which intestinal fungi interact with the host immune system are not fully elucidated.
Purpose of the Study:
- To investigate the impact of mucosal fungi on host physiology.
- To understand the specific immune pathways involved in fungal-host interactions within the intestine.
Main Methods:
- Analysis of immune cell responses to mucosal fungi.
- Measurement of cytokine production by T helper 17 (Th17) cells.
- Assessment of the effects of specific cytokines on gut epithelium and neuronal function.
Main Results:
- Mucosal fungi were shown to induce intestinal Th17 cells to produce interleukin-22 (IL-22) and interleukin-17A (IL-17A).
- IL-22 was found to act on the gut epithelium, promoting barrier integrity.
- IL-17A was observed to act on IL-17RA-positive neurons, enhancing sociability.
Conclusions:
- Intestinal fungi play a significant role in modulating host immunity and physiology.
- The study identifies specific cytokine-mediated pathways linking gut fungi to barrier function and behavior.
- These findings open new avenues for understanding the complex interplay between the gut mycobiome and host health.
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