Potentiation of NO-dependent activation of soluble guanylyl cyclase by 5-nitroisatin and antiviral preparatation arbidol

Severina I.S.1, Schegolev A.Yu.1, Medvedev A.E.1

1. Institute of Biomedical Chemistry, Russian Academy of Medical Sciences
Section: Experimental/Clinical Study
DOI: 10.18097/pbmc20135903295      UDK: 616.155.16.615.9      PubMed Id: 23987067
Year: 2013  Volume: 59  Issue: 3  Pages: 295-304
Isatin (indole-dione) is an endogenous indole that exibits a wide range of biological and physiological activity. The influence of isatin derivatives 5-nitroisatin and arbidol (an antiviral preparatation) on spermine NONO-induced activation of human platelet soluble guanylyl cyclase was investigated. 5-nitroistnin and arbidol had no effect on basal activity, but synergistically increased in a concentration-dependent manner the spermine NONO-induced activation of this enzyme. 5-Nitroisatin and arbidol, like YC-1, sensitized guanylyl cyclase towards nitric oxide (NO) and produced a leftward shift of the spermine NONO concentration response curve. At the same time both compounds used did not influence the activation of guanylyl cyclase by YC-1 and did not change the synergistic increase of spermine NONO-induced activation of soluble guanylyl cyclase in the presence of YC-1. This suggests that 5-nitroisanin and arbidol did not compete with YC-1. Addition of isatin did not change the synergistic increase in the spermine NONO-induced guanylyl cyclase activation by 5-nitroisatin and arbidol and did not influence a leftward shift of spermine NONO concentration response curve produced by these compounds. These data suggest lack of competitive interaction between isatin and both its derivatives used.
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Severina I.S., Schegolev A.Yu., Medvedev A.E. (2013) Biomeditsinskaya khimiya, 59(3), 295-304.
This paper is also available as the English translation:10.1134/S1990750813040070
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