The gut mucosa is the largest and most dynamic immunological environment of the body. It hosts the body's largest population of immune cells. It is often the first point of pathogen exposure and many microbes use it as a beachhead into the rest of the body.
The gut immune system therefore needs to be ready to respond to pathogens but at the same time it is constantly exposed to innocuous environmental antigens, food particles and commensal microflora which need to be tolerated.
Misdirected immune responses to harmless antigens are the underlying cause of food allergies and debilitating conditions such as inflammatory bowel disease. This animation introduces the key cells and molecular players involved in gut immunohomeostasis and disease.
Nature Immunology in collaboration with Arkitek Studios have produced an animation unraveling the complexities of mucosal immunology in health and disease:
T helper cells (click to enlarge the image).
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FoodAllergySupport @FASupport: More fun than Magic School Bus!