Helping to defend those tissues are innate lymphoid cells, or ILCs, which when faced with a threat, stimulate proteins called cytokines that further activate the immune system and control the intestinal microbiome.
These cells naturally diminish with aging or can be depleted by certain medical conditions.
ILCs are made inside bone marrow and circulate in the blood. But how are they activated to mobilize and travel to their target sites to replenish the depleted pool of tissue ILCs?
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