Related Experiment Videos
The effect of nematode infection upon intestinal smooth muscle function
1Division of Gastroenterology, McMaster University Medical Center, Hamilton, Ontario, Canada.
Parasite Immunology
|July 4, 1998
Summary
Nematode infections trigger immune responses that alter intestinal muscle function, primarily via CD4+ T lymphocytes. This immune-driven muscle change may help expel parasites but can persist, impacting clinical gastroenterology.
Area of Science:
- Immunology
- Gastroenterology
- Parasitology
Background:
- Nematode infections induce changes in intestinal physiology, including heightened muscle contraction.
- Understanding immune and inflammatory mediators is crucial for modulating intestinal muscle function during infection.
Purpose of the Study:
- To investigate the role of immune cells and mediators in the immunomodulation of intestinal smooth muscle function during Trichinella spiralis infection.
- To explore the adaptive significance of altered muscle function in parasite expulsion and its potential long-term consequences.
Main Methods:
- Infection of various immunodeficient mouse strains with T. spiralis.
- Gene transfer techniques to study T lymphocyte involvement.
- Analysis of intestinal muscle function and propulsion in infected mice.
Main Results:
- CD4+ T lymphocytes, particularly the CD4+ve subset, were identified as key mediators altering smooth muscle function.
- Eosinophils and interleukin-4 may also play a role in this immunomodulation.
- Impaired intestinal propulsion or immunodeficiency in mutant mice led to reduced muscle function changes and prolonged infections.
Conclusions:
- Increased intestinal muscle function during nematode infection appears to be an adaptive host response for parasite expulsion.
- The mechanisms underlying immune-mediated intestinal muscle changes warrant further investigation for their clinical relevance in gastroenterology, especially concerning motility disturbances post-infection.