Immune response against bacteria, illustration

Bildnummer 13426130
Immune response against bacteria, illustration
Illustration showing the immune response to bacteria in the gut. Bacteria and other foreign objects in the body are recognised by cells that are part of the immune system. One of these type of cells are dendritic cells (pink, centre). They are antigen-presenting cells (APCs), that is, they present pathogens or foreign molecules (antigens, blue spheres) to other cells of the immune system to be eliminated. Dendritic cells release cytokines (signalling molecules) such as interleukin-23 (IL-23, pink fog) . IL23 can stimulate another group of cells called type three innate lymphoid cells (ILC3, blue-yellow spheres). ILC3 cells can also release cytokines such as interleukin-22 (IL-22, yellow fog). IL-22 is part of the body's antimicrobial response. Type one (ILC1, lower blue spheres) and type 2 (ILC2, lower purple spheres) innate lymphoid cells are also seen. ILC1 cells activate macrophages and signal to T-lymphocyte cells. ILC2 play a role in the immune response to parasites, external toxins, venom and allergens.
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / KEITH CHAMBERS
Bildgröße: 10451 px × 8400 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
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