The interaction of [3H]nitrendipine with receptors for calcium antagonists in the cerebral cortex and heart of rats

Frederick J. Ehlert, Eiko Itoga, William R. Roeske, Henry I. Yamamura

Research output: Contribution to journalArticle

151 Scopus citations

Abstract

The binding properties of the calcium antagonist, [3H]nitrendipine, were investigated in homogenates of the rat cerebral cortex and myocardium. The specific component of [3H]nitrendipine binding was consistent with mass action behavior and was described by a high affinity dissociation constant in the range of 0.1 - 0.3 nM. [3H]nitrendipine binding was sensitive to inhibition by other calcium antagonists and by the cations Ca+2 and La+3. The inhibition of [3H]nitrendipine binding by verapamil was not of the simple competitive type but resembled allosteric inhibition, suggesting that there are at least two binding sites for calcium antagonists.

Original languageEnglish (US)
Pages (from-to)937-943
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume104
Issue number3
DOIs
StatePublished - Feb 11 1982
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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