Bradykinin-induced changes in Inositol trisphosphate mass in MDCK cells

D. Portilla, A. R. Morrison

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Bradykinin produces increases in cytosolic calcium in MDCK cells. We have extracted and separated Inositol 1,4,5 trisphosphate by HPLC and after-acid hydrolysis and conversion to the hexatrifluro-acetyl derivative quantitated by negative ion chemical ionization mass spectrometry the mass of inositol trisphosphate in MDCK cells. Bradykinin causes an increase in the mass of Inositol trisphosphate from basal levels of 152 pmoles/mg cell protein to 537 pmoles/mg cell protein by 10 secs of stimulation. We conclude that bradykinin stimulates PLC hydrolysis of PIP2 with rapid release of IP3 in sufficient amount to account for the increase in cytosolic Ca++.

Original languageEnglish
Pages (from-to)644-649
Number of pages6
JournalBiochemical and Biophysical Research Communications
Issue number2
StatePublished - Oct 30 1986


Dive into the research topics of 'Bradykinin-induced changes in Inositol trisphosphate mass in MDCK cells'. Together they form a unique fingerprint.

Cite this