Cited by 91Nitric Oxide and Endothelin EffectsFolate and B Vitamins ResearchCardiovascular Health and Disease Prevention

Chronic oral supplementation with sepiapterin prevents endothelial dysfunction and oxidative stress in small mesenteric arteries from diabetic (db/db) mice

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Pannirselvam, Malarvannan, Simon, Valerie, Verma, Subodh, Anderson, Todd, Triggle, Chris R·2003·British Journal of Pharmacology

Abstract

We previously reported that acute incubation with tetrahydrobiopterin (BH 4) or sepiapterin, a cofactor for endothelial nitric oxide synthase and a stable precursor of BH 4, respectively, enhanced the acetylcholine (Ach)‐induced relaxation of isolated small mesenteric arteries (SMA) from diabetic (db/db) mice. In this study, we investigated the effect of chronic oral supplementation of sepiapterin (10 mg kg−1 day−1) to db/db mice on endothelium function, biopterin levels and lipid peroxidation in SMA. Oral dietary supplementation with sepiapterin had no effect on glucose, triglyceride, cholesterol levels and body weight. SMA from db/db mice showed enhanced vascular reactivity to phenylephrine, which was corrected with sepiapterin supplementation. Furthermore, Ach, but not sodium nitroprusside‐induced relaxation, was improved with sepiapterin supplementation in db/db mice. BH 4 levels and guanosine triphosphate cyclohydrolase I activity in SMA were similar in db/+ and db/db mice. Sepiapterin treatment had no effects on BH 4 or guanosine triphosphate cyclohydrolase I activity. However, the level of dihydrobiopterin+biopterin was higher in SMA from db/db mice, which was corrected following sepiapterin treatment. Thiobarbituric acid reactive substance, malondialdehyde, a marker of lipid peroxidation, was higher in SMA from db/db mice, and was normalized by sepiapterin treatment. These results indicate that sepiapterin improves endothelial dysfunction in SMA from db/db mice by reducing oxidative stress. Furthermore, these results suggest that decreased biosynthesis of BH 4 may not be the basis for endothelial dysfunction in SMA from db/db mice. British Journal of Pharmacology (2003) 140, 701–706. doi:10.1038/sj.bjp.0705476

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Authors
Pannirselvam, M., Simon, V., Verma, S., Anderson, T., & Triggle, C. R.
Affiliations
  • University of Calgary (CA)
  • Toronto General Hospital (CA)
Corresponding author
Triggle, Chris R
Venue
British Journal of Pharmacology
Publisher
Wiley
Published
2003-10
Volume
140
Issue
4
Pages
701-706
ISSN
  • 0007-1188 (ISSN-L)
  • 1476-5381
OpenAlex
W2107293885
Cited by
91
References
30
Citations by year
2025: 1 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 2 · 2020: 3 · 2019: 2 · 2018: 4 · 2017: 5 · 2016: 5 · 2015: 1 · 2014: 4 · 2013: 1 · 2012: 6
FWCI
2.30
Type
journal article
Language
en
Open access
Locations
  • British Journal of Pharmacology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Rheumatology › Folate and B Vitamins Research
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
Keywords
sepiapterin, tetrahydrobiopterin, endothelial dysfunction, oxidative stress, lipid peroxidation, diabetic vascular disease, db/db mice, mesenteric small arteries, endothelial nitric oxide synthase, acetylcholine-induced relaxation, phenylephrine vasoconstriction, dietary supplementation
MeSH terms
Acetylcholine, Administration, Oral, Animals, Biopterins, Diabetes Mellitus, Disease Models, Animal, Drug Administration Schedule, Drug Therapy, Combination, Endothelium, Vascular, GTP Cyclohydrolase, Male, Malondialdehyde, Mice, Inbred C57BL, Phenylephrine, Pterins, Vasoconstriction, Vasodilation, Lipid Peroxidation, Mesenteric Artery, Inferior, Oxidative Stress, Neopterin, Mice

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