Effects of carbon monoxide on trout and lamprey vessels

Ryan A. Dombkowski, Nathan L. Whitfield, Roberto Motterlini, Yan Gao, Kenneth Olson

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Carbon monoxide (CO) is endogenously produced by heme oxygenase (HO) and is involved in vascular, neural, and inflammatory responses in mammals. However, the biological activities of CO in nonmammalian vertebrates is unknown. To this extent, we used smooth muscle myography to investigate the effects of exogenously applied CO (delivered via a water-soluble CO-releasing molecule, CORM-3) on isolated lamprey (Petromyzon marinus) dorsal aortas and examined its mechanisms of action on trout (Oncorhynchus mykiss) efferent branchial (EBA) and celiacomesenteric (CMA) arteries. CORM-3 dose-dependently relaxed all vessels examined. Trout EBA were twofold more sensitive to CORM-3 when precontracted with norepinephrine (NE) than KCl and CORM-3 relaxed five-fold more of the NE- than KCl-induced tension. Glybenclamide (10 μM), an ATP-sensitive potassium channel inhibitor, inhibited NE-induced contraction, but did not affect CORM-3-induced relaxation. NS-2028 (10 μM), a soluble guanylyl cyclase inhibitor, had no effect on a NEcontraction, but inhibited a subsequent CORM-3-induced relaxation. Zinc protopophyrin-IX (ZnPP-IX, 0.3-30 μM), a HO inhibitor, elicited a small, yet dose-dependent and significant, increase in baseline tension but did not have any effect on subsequent NE-induced contractions or a nitric oxide-induced relaxation (via sodium nitroprusside). [ZnPP-IX] greater than 3 μM, however, significantly reduced the predominant vasodilatory response of trout EBA to hydrogen sulfide. These results implicate an active HO/CO pathway in trout vessels having an impact on resting vessel tone and CO-induced vasoactivity that is at least partially mediated by soluble guanylyl cyclase.

Original languageEnglish
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Volume296
Issue number1
DOIs
StatePublished - Jan 2009

Fingerprint

Lampreys
Trout
Carbon Monoxide
Heme Oxygenase (Decyclizing)
Norepinephrine
Myography
Petromyzon
KATP Channels
Hydrogen Sulfide
Glyburide
Oncorhynchus mykiss
Nitroprusside
Smooth Muscle
Blood Vessels
Aorta
Vertebrates
Zinc
Mammals
Nitric Oxide
Arteries

Keywords

  • Gasotransmitters
  • Guanylyl cyclase
  • Hydrogen sulfide
  • Vasodilator

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

Effects of carbon monoxide on trout and lamprey vessels. / Dombkowski, Ryan A.; Whitfield, Nathan L.; Motterlini, Roberto; Gao, Yan; Olson, Kenneth.

In: American Journal of Physiology - Regulatory Integrative and Comparative Physiology, Vol. 296, No. 1, 01.2009.

Research output: Contribution to journalArticle

Dombkowski, Ryan A. ; Whitfield, Nathan L. ; Motterlini, Roberto ; Gao, Yan ; Olson, Kenneth. / Effects of carbon monoxide on trout and lamprey vessels. In: American Journal of Physiology - Regulatory Integrative and Comparative Physiology. 2009 ; Vol. 296, No. 1.
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