Nitric-oxide mediated effects of transdermal capsaicin patches on the ischemic threshold in patients with stable coronary disease

Gabriele Fragasso, Altin Palloshi, Pier Marco Piatti, Lucilla Monti, Enrico Rossetti, Emanuela Setola, Chiara Montano, Giorgio Bassanelli, Giliola Calori, Alberto Margonato

Research output: Contribution to journalArticle

Abstract

Background: Capsaicin has been shown to exert direct vasodilating effects through increased calcitonin gene-related peptide (CGRP) release. However, no data exist on its effect following systemic administration in humans. Methods: Twelve male patients with stable coronary disease and a persistently positive exercise were selected for study. According to a double blind, placebo-controlled, cross-over study, patients were randomized to placebo or 3 g oleic capsaicin-containing patches, on 2 different days and with a 2-day interval between treatments. Patients performed treadmill exercise testing according to the Bruce protocol. Time to 1 mm ST segment depression and to peak exercise, maximal ST segment depression, and the number of ECG leads showing diagnostic changes were also measured. Blood samples for nitric oxide (NO) and CGRP were drawn at baseline, 2, 6, and 24 hours after exercise. Results: On placebo, all patients had a positive ECG during exercise test. Only 1 patient experienced angina, on both treatments. With capsaicin, 1 patient had a negative exercise, while 8 patients significantly increased time to 1 mm ST depression from 328 ± 167 to 401 ± 174 seconds (P = 0.01). Of the remaining patients, 1 did not show any changes and 2 showed a worse ischemic threshold when on capsaicin. CGRP levels were not significantly different between placebo and capsaicin treatment. Conversely, when on capsaicin, NO significantly increased at 6 hours. Conclusions: Transdermal capsaicin may improve ischemic threshold in patients with stable coronary disease, probably through arteriolar vasodilation. Increased capsaicin-induced NO availability could represent the principal mechanism of action.

Original languageEnglish
Pages (from-to)340-347
Number of pages8
JournalJournal of Cardiovascular Pharmacology
Volume44
Issue number3
DOIs
Publication statusPublished - Sep 2004

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Keywords

  • Calcitonin gene-related peptide
  • Capsaicin
  • Coronary disease
  • Exercise testing
  • Myocardial ischemia
  • Nitric oxide

ASJC Scopus subject areas

  • Pharmacology
  • Cardiology and Cardiovascular Medicine

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