Purinergic Signalling

, Volume 5, Issue 3, pp 343–349

Myogenic tone in mouse mesenteric arteries: evidence for P2Y receptor-mediated, Na+, K+, 2Cl cotransport-dependent signaling

  • Svetlana V. Koltsova
  • Georgy V. Maximov
  • Sergei V. Kotelevtsev
  • Julie L. Lavoie
  • Johanne Tremblay
  • Ryszard Grygorczyk
  • Pavel Hamet
  • Sergei N. Orlov
Original Paper

DOI: 10.1007/s11302-009-9160-4

Cite this article as:
Koltsova, S.V., Maximov, G.V., Kotelevtsev, S.V. et al. Purinergic Signalling (2009) 5: 343. doi:10.1007/s11302-009-9160-4

Abstract

This study examines the action of agonists and antagonists of P2 receptors on mouse mesenteric artery contractions and the possible involvement of these signaling pathways in myogenic tone (MT) evoked by elevated intraluminal pressure. Both ATP and its non-hydrolyzed analog α,β-ATP triggered transient contractions that were sharply decreased in the presence of NF023, a potent antagonist of P2X1 receptors. In contrast, UTP and UDP elicited sustained contractions which were suppressed by MRS2567, a selective antagonist of P2Y6 receptors. Inhibition of Na+, K+, 2Cl cotransport (NKCC) with bumetanide led to attenuation of contractions in UTP- but not ATP-treated arteries. Both UTP-induced contractions and MT were suppressed by MRS2567 and bumetanide but were insensitive to NF023. These data implicate a P2Y6-mediated, NKCC-dependent mechanism in MT of mesenteric arteries. The action of heightened intraluminal pressure on UTP release from mesenteric arteries and its role in the triggering of P2Y6-mediated signaling should be examined further.

Keywords

Mesenteric arteries Myogenic tone P2Y receptors Na+, K+, 2Cl cotransport 

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Svetlana V. Koltsova
    • 1
    • 2
  • Georgy V. Maximov
    • 3
  • Sergei V. Kotelevtsev
    • 3
  • Julie L. Lavoie
    • 1
  • Johanne Tremblay
    • 1
  • Ryszard Grygorczyk
    • 1
  • Pavel Hamet
    • 1
  • Sergei N. Orlov
    • 1
    • 2
    • 3
    • 4
  1. 1.Research CentreUniversity of Montreal Hospital Centre (CRCHUM)MoscowRussia
  2. 2.Institute of General Pathology and PathophysiologyRussian Academy of Medical SciencesMoscowRussia
  3. 3.Faculty of BiologyM.V. Lomonosov Moscow State UniversityMoscowRussia
  4. 4.Centre de recherche, CRCHUM—Technopôle AngusMontrealCanada

Personalised recommendations