Cited by 217Nitric Oxide and Endothelin EffectsHemoglobin structure and functionMetal-Catalyzed Oxygenation Mechanisms

Dinitrosyl iron complexes with thiolate ligands: physico-chemistry, biochemistry and physiology

Vanin, Anatoly F.·2009·Nitric Oxide

Abstract

Some present-day concepts on the origin and functional activities of dinitrosyl iron complexes (DNIC) with thiolate ligands are considered. Nitric oxide (NO) including to DNIC increases its stability and ensures effective targeting of NO to organs and tissues. DNIC have a square-planar structure; unpaired electron is localized on the d(z2) orbital of the d(7) iron atom. The formula of DNIC appears as [(RS(-))(2)Fe(+)(NO(+))(2)....((-)SR)(2)](-); electron spin is S=1/2. Conversion of an originally diamagnetic group, Fe(2+)(NO)(2) with electron configuration d(8), into a paramagnetic Fe(+)(NO(+))(2) group is a result of disproportionation of NO ligands and substitution of newly generated NO(-) for NO. The nitrosonium ions present in DNIC impart to them high nitrosylating activity, e.g., ability to induce S-nitrosylation of thiols. The ability of S-nitrosothiols to form DNIC in a direct reaction with bivalent iron is a prerequisite to effective mutual conversions of DNIC and S-nitrosothiols. In this work, I consider some mechanisms of destructive effects of low-molecular DNIC on active centers of iron-sulfur proteins, ability of DNIC to express certain genes, to activate guanylate cyclase, to exert hypotensive, vasodilator effects, to inhibit platelet aggregation, to accelerate wound healing and to produce potent erective action. Recently a stabilized powder-like polymeric composition based on dimeric glutathione DNIC the water-soluble polymer in which was used as a filling agent was designed. The advantages of this stable DNIC-glutathione preparation include their ability to retain their physico-chemical and functional activities within at least one year. At present, the preparation undergo testing as a base for the design of a wide variety of broad-spectrum drugs.

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Crossref · 10.1016/j.niox.2009.03.005

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  • DNICs are formed in the vasculature from nitrosothiols and are in equilibrium with the nitrosothiol pool.

    “It was proposed that DNICs are formed in the vasculature from nitrosothiols and that they are in equilibrium with the nitrosothiol pool [103,104].”

    From On the chemical biology of the nitrite/sulfide interaction (2015) · cites this paper as [103]

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Authors
Vanin, A. F.
Affiliations
Russian Academy of Sciences (RU)
Corresponding author
Vanin, Anatoly F.
Venue
Nitric Oxide
Publisher
Elsevier BV
Published
2009-08
Volume
21
Issue
1
Pages
1-13
ISSN
1089-8603 (ISSN-L)
OpenAlex
W2044091187
Cited by
217
References
126
Citations by year
2026: 2 · 2025: 3 · 2024: 2 · 2023: 9 · 2022: 10 · 2021: 11 · 2020: 12 · 2019: 9 · 2018: 15 · 2017: 15 · 2016: 13 · 2015: 16 · 2014: 28 · 2013: 21 · 2012: 19
FWCI
1.87
Type
journal article
Language
en
Open access
closed
Locations
  • Nitric Oxide (publishedVersion)
  • PubMed (publishedVersion)
Funders
Russian Foundation for Basic Research
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
Keywords
dinitrosyl iron complexes, thiolate ligands, nitrosonium ion, S-nitrosylation, S-nitrosothiols, iron-sulfur proteins, guanylate cyclase activation, platelet aggregation inhibition, wound healing, erectile function, glutathione, polymeric drug delivery
MeSH terms
Animals, Electron Spin Resonance Spectroscopy, Iron, Liver, Nitric Oxide, Nitrogen Oxides, Sulfhydryl Compounds, Chemical Phenomena

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