Study discovers T cells in human blood secrete a substance that affects blood pressure and inflammation

Acetylcholine regulates blood flow, but the source of blood acetylcholine has been unclear. Now, researchers at Karolinska Institutet have discovered that certain T cells in human blood can produce acetylcholine, which may help regulate blood pressure and inflammation. The study, which is published in PNAS, also demonstrates a possible association between these immune cells in seriously ill patients and the risk of death.

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