Abstract
The antiallergic and antiasthmatic drug, azelastine, interacts strongly with calmodulin (but not bovine serum albumin) as determined by an indirect assay; it also moderately inhibited the Ca2+-calmodulin-dependent enzyme bovine brain phosphodiesterase. Ketotifen was less active than azelastine in both assays of calmodulin reactivity and both drugs were less active than the recognized calmodulin inhibitor, W-7. Neither azelastine nor ketotifen had any inhibitory effect on the Ca2+- and phospholipid-dependent protein kinase C. A number of other commonly employed antiallergic and antiasthmatic drugs were essentially inactive in the calmodulin assays and had no or marginal inhibitory effect on protein kinase C.
MeSH Terms
3',5'-Cyclic-AMP Phosphodiesterases/antagonists & inhibitors
Animals
Brain/enzymology
Calcium/pharmacology
Calmodulin/antagonists & inhibitors,pharmacology
Fluorescent Dyes
Histamine H1 Antagonists/pharmacology
Ketotifen/pharmacology
Phosphodiesterase Inhibitors
Phthalazines/pharmacology
Protein Kinase C/antagonists & inhibitors
Pyridazines/pharmacology
Rats
Serum Albumin, Bovine/metabolism
Spectrometry, Fluorescence
Sulfonamides/pharmacology
Chemicals
Calmodulin
Fluorescent Dyes
Histamine H1 Antagonists
Phosphodiesterase Inhibitors
Phthalazines
Pyridazines
Sulfonamides
Serum Albumin, Bovine
W 7
Protein Kinase C
3',5'-Cyclic-AMP Phosphodiesterases
Calcium
Ketotifen
azelastine
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Middleton E
Department of Medicine State University of New York, Buffalo 14214.
Ferriola P
Drzewiecki G
Sofia R D
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