Merck, B3259-5MG, Bradykinin acetate salt

Application
Bradykinin acetate salt has been used:
to stimulate the contraction of guinea pig ileum
as a contractile agent in fibroblasts
In the stimulation of endothelium of human subcutaneous artery
To evoke Ca2+ signals in neuroblastoma-glioma hybrid cell line, NG108-15

Biochem/physiol Actions
Activates pain receptors; induces smooth muscle contraction; activates Ca2+-dependent nitric oxide synthetase; increases capillary permeability.
Bradykinin is a pro-inflammatory peptide that acts through G-protein-coupled receptors. It activates sphingolipid metabolism. Fibroblasts treated with bradykinin produce a rapid and important increase in ceramide which is followed by a transient rise in sphingosine content. The peptide also increases ceramide cellular content by rapidly mobilizing neutral glycolipids. Bradykinin plays an important role in the regulation of fluid and electrolyte balance, smooth muscle contraction, vasodilation and capillary permeability. The bradykinin potentiators, which possess no bradykinin activity themselves, enhance the activity of bradykinin.