Cigarette smoke impairs endothelium-dependent relaxation in rabbit superficial femoral veins

Julie A. Freischlag, Dawn Johnson, Michael M. Farooq, Jonathan Doty, Robert A. Cambria, Gary R. Seabrook, Jonathan B. Towne

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Background. The use of autogenous vein for arterial reconstruction provides the optimal conduit for limb salvage. Cigarette smoking is a risk factor for vascular disease and may adversely affect graft patency and limb preservation rates of extremities reconstructed with autogenous vein. This study was performed in order to determine the effects of cigarette smoke on venous endothelium-dependent relaxation which is mediated by nitric oxide. Materials and methods. New Zealand white rabbits were exposed to cigarette smoke in a 240-ft3 air-flow chamber for 3 h per day, 5 days per week, for 8 weeks. A control group was treated similarly without infusion of smoke into the chamber. Elevated serum cotinine and carboxyhemoglobin levels comparable to those of chronic smokers were observed in the experimental group. After 8 weeks, the superficial femoral veins were explanted, cut into 3-mm segments, and studied in organ chambers. Results. No difference in contractile response to KCl (80 mM) (control, 0.10 ± 0.06; smoke, 0.17 ± 0.04) or norepinephrine (EC50) (control, 0.78 ± 0.18; smoke, 0.87 ± 0.11) was seen. A significant decrease in relaxation was noted with all doses of acetylcholine (M) (control, 10-8 50.35 ± 8.37, 3 x 10-8 - 71.20 ± 9.05, 10-7 - 88.32 ± 13.72, 3 x 10-7 - 92.86 ± 13.69; and smoke, 10-9 - 8.25 ± 1.83*, 3 x 10-8 - 19.11 ± 5.11*, 10-7 - 31.84 ± 7.90*, 3 x 10-7 39.74 ± 8.65*; *P < 0.05). Both control and smoke veins relaxed completely with sodium nitroprusside. Conclusions. Superficial femoral veins, when exposed to cigarette smoke, demonstrated a significant decrease in endothelium-dependent relaxation in response to acetylcholine without smooth muscle injury. This loss of vasomotor tone could be detrimental overtime in veins which have been placed as arterial conduits.

Original languageEnglish (US)
Pages (from-to)77-80
Number of pages4
JournalJournal of Surgical Research
Volume81
Issue number1
DOIs
StatePublished - Jan 1999
Externally publishedYes

Keywords

  • Cigarette smoke
  • Endothelium
  • Nitric oxide

ASJC Scopus subject areas

  • Surgery

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  • Cite this

    Freischlag, J. A., Johnson, D., Farooq, M. M., Doty, J., Cambria, R. A., Seabrook, G. R., & Towne, J. B. (1999). Cigarette smoke impairs endothelium-dependent relaxation in rabbit superficial femoral veins. Journal of Surgical Research, 81(1), 77-80. https://doi.org/10.1006/jsre.1998.5440