Cited by 49Nitric Oxide and Endothelin EffectsCardiovascular Health and Disease PreventionEicosanoids and Hypertension Pharmacology

N‐substituted analogues of S‐nitroso‐N‐acetyl‐D,L‐penicillamine: chemical stability and prolonged nitric oxide mediated vasodilatation in isolated rat femoral arteries

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Megson, I L, Morton, S, Greig, I R, Mazzei, F A, Field, R A, Butler, A R, Caron, G, Gasco, A +2 more·1999·British Journal of Pharmacology

Abstract

Previous studies show that linking acetylated glucosamine to S‐nitroso‐N‐acetyl‐D,L‐penicillamine (SNAP) stabilizes the molecule and causes it to elicit unusually prolonged vasodilator effects in endothelium‐denuded, isolated rat femoral arteries. Here we studied the propanoyl (SNPP; 3 carbon side‐chain), valeryl (SNVP; 5C) and heptanoyl (SNHP; 7C) N‐substituted analogues of SNAP (2C), to further investigate other molecular characteristics that might influence chemical stability and duration of vascular action of S‐nitrosothiols. Spectrophotometric analysis revealed that SNVP was the most stable analogue in solution. Decomposition of all four compounds was accelerated by Cu(II) and cysteine, and neocuproine, a specific Cu(I) chelator, slowed decomposition of SNHP. Generation of NO from the compounds was confirmed by electrochemical detection at 37°C. Bolus injections of SNAP (10 μl; 10−8–10−3 M) into the perfusate of precontracted, isolated rat femoral arteries taken from adult male Wistar rats (400–500 g), caused concentration‐dependent, transient vasodilatations irrespective of endothelial integrity. Equivalent vasodilatations induced by SNVP and SNHP were transient in endothelium‐intact vessels but failed to recover to pre‐injection pressures at moderate and high concentrations (10−6–10−3 M) in those denuded of endothelium. This sustained effect (>1 h) was most prevalent with SNHP and was largely reversed by the NO scavenger, haemoglobin. We suggest that increased lipophilicity of SNAP analogues with longer sidechains facilitates their retention by endothelium‐denuded vessels; subsequent slow decomposition within the tissue generates sufficient NO to cause prolonged vasodilatation. This is a potentially useful characteristic for targeting NO delivery to areas of endothelial damage. British Journal of Pharmacology (1999) 126, 639–648; doi:10.1038/sj.bjp.0702346

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  1. MONCADA, S., REES, D.D., SCHULZ, R. & PALMER, R.M.J. (1991). Development and mechanism of a speci®c supersensitivity to nitrovasodilators following inhibition of nitric oxide synthase in vivo. Proc. Natl. Acad. Sci. U.S.A., 88, 2166 ± 2170.
  2. SWIFT, H. (1989). PhD Thesis. Department of Chemistry, University of Durham, Durham, U.K.
  3. Pliska, V., Testa, B. & van de Waterbeemd, H. pp. 49 ± 71. Weinheim: VCH Publishers.

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Authors
Megson, I. L., Morton, S., Greig, I. R., Mazzei, F. A., Field, R. A., Butler, A. R., Caron, G., Gasco, A., Fruttero, R., & Webb, D. J.
Affiliations
  • Western General Hospital (GB)
  • University of St Andrews (GB)
  • University of Turin (IT)
Corresponding author
Megson, I L
Venue
British Journal of Pharmacology
Publisher
Wiley
Published
1999-02
Volume
126
Issue
3
Pages
639-648
ISSN
  • 0007-1188 (ISSN-L)
  • 1476-5381
OpenAlex
W2013635851
Cited by
49
References
48
Citations by year
2022: 1 · 2021: 1 · 2020: 1 · 2019: 3 · 2017: 2 · 2016: 6 · 2015: 1 · 2014: 2 · 2013: 2
FWCI
2.08
Type
journal article
Language
en
Open access
Locations
  • British Journal of Pharmacology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Research Explorer (The University of Manchester) (submittedVersion)
  • UEA Digital Repository (University of East Anglia) (submittedVersion)
Funders
Wellcome Trust
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
Keywords
S-nitrosothiols, nitric oxide, vasodilation, chemical stability, lipophilicity, side chain length, cysteine, femoral artery
MeSH terms
Animals, Endothelium, Vascular, Femoral Artery, Hydrogen-Ion Concentration, Male, Nitric Oxide, Penicillamine, Solubility, Vasodilation, Water, Rats, Wistar, 1-Octanol, Nitric Oxide Donors, Rats, In Vitro Techniques

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