English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The pharmacological and biochemical mechanisms of contractile responses to the protein kinase C (PKC) activator phorbol-12, 13-diacetate (PDA) were investigated in canine basilar arteries, In the normal medium, PDA elicited a strong, dose-related, and slow-developing sustained contraction, Among the constrictors examined, including serotonin, prostaglandin F 2α  and endothelin, only PDA yielded contractions in a 2 Ca 2+  -free medium, In both media, the PDA-induced contractions were virtually inhibited by either staurosporine, H-7, or quinacrine, while neither neurotransmitter blockades nor R24571 (calmidazolium) exerted significant effects, In addition, it was shown that 8-bromocyclic GMP, but not 8-bromocyclic AMP, markedly curtailed the PDA-induced contractions, Biochemical analysis, furthermore, showed that PDA induced increased phosphorylations of 27- and 96-kDa and proteins other than the myosin light chain (MLC) 20-kDa protein, Thus, the present results open up a novel mechanism of sustained cerebral artery contractions, where PKC activation rather than Ca 2+ /calmodulin/MLC system plays a key role that is regulated both by phospholipase A 2 and by cyclic GMP.

Phorbol 12,13-Diacetate-Induced Contraction of the Canine Basilar Artery: Role of Protein Kinase C