Faculty Collaboration Database

EMD 52692 (bimakalim), a new potassium channel opener, attenuates luminol-enhanced chemiluminescence and superoxide anion radical formation by zymosan-activated polymorphonuclear leukocytes. Immunopharmacology 1992;23(3):191-7

Date

05/01/1992

Pubmed ID

1323556

DOI

10.1016/0162-3109(92)90025-8

Scopus ID

2-s2.0-0026650533 (requires institutional sign-in at Scopus site)   25 Citations

Abstract

We investigated the relationship of potassium channel activation on modulation of oxidative respiratory bursts in canine neutrophils. Generation of superoxide anion radicals in opsonized zymosan-activated cells was determined using the technique of ferricytochrome c reduction. Preincubation of cells with the selective potassium channel opener, EMD 52692 (1-100 microM), attenuated superoxide anion radical production. Furthermore, EMD 52692 also produced a concentration-dependent inhibition of luminol-enhanced chemiluminescence by activated neutrophils. Glyburide, a selective antagonist of ATP-sensitive potassium channels, prevented the modulatory effect of EMD 52692 on both superoxide anion generation and luminol-enhanced chemiluminescence. The results suggest that ATP-sensitive potassium channels may play a significant role in regulating oxygen-derived free radical production in neutrophil-induced tissue injury.

Author List

Pieper GM, Gross GJ

MESH terms used to index this publication - Major topics in bold

Animals
Benzopyrans
Dihydropyridines
Dogs
Luminescent Measurements
Neutrophils
Oxidation-Reduction
Potassium Channels
Superoxides
Vasodilator Agents
Zymosan