Origins of variation in conducted vasomotor responses

Research output: Contribution to journalJournal articleResearchpeer-review

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Origins of variation in conducted vasomotor responses. / Hald, Bjørn Olav; Welsh, Donald G.; Holstein-Rathlou, Niels-Henrik; Jacobsen, Jens Christian Brings.

In: Pflügers Archiv - European Journal of Physiology, Vol. 467, No. 10, 10.2015, p. 2055-2067.

Research output: Contribution to journalJournal articleResearchpeer-review

Harvard

Hald, BO, Welsh, DG, Holstein-Rathlou, N-H & Jacobsen, JCB 2015, 'Origins of variation in conducted vasomotor responses', Pflügers Archiv - European Journal of Physiology, vol. 467, no. 10, pp. 2055-2067. https://doi.org/10.1007/s00424-014-1649-1

APA

Hald, B. O., Welsh, D. G., Holstein-Rathlou, N-H., & Jacobsen, J. C. B. (2015). Origins of variation in conducted vasomotor responses. Pflügers Archiv - European Journal of Physiology, 467(10), 2055-2067. https://doi.org/10.1007/s00424-014-1649-1

Vancouver

Hald BO, Welsh DG, Holstein-Rathlou N-H, Jacobsen JCB. Origins of variation in conducted vasomotor responses. Pflügers Archiv - European Journal of Physiology. 2015 Oct;467(10):2055-2067. https://doi.org/10.1007/s00424-014-1649-1

Author

Hald, Bjørn Olav ; Welsh, Donald G. ; Holstein-Rathlou, Niels-Henrik ; Jacobsen, Jens Christian Brings. / Origins of variation in conducted vasomotor responses. In: Pflügers Archiv - European Journal of Physiology. 2015 ; Vol. 467, No. 10. pp. 2055-2067.

Bibtex

@article{67d6415a54ba481ab1e10e5937dbda22,
title = "Origins of variation in conducted vasomotor responses",
abstract = "Regulation of blood flow in the microcirculation depends on synchronized vasomotor responses. The vascular conducted response is a synchronous dilatation or constriction, elicited by a local electrical event that spreads along the vessel wall. Despite the underlying electrical nature, however, the efficacy of conducted responses varies significantly between different initiating stimuli within the same vascular bed as well as between different vascular beds following the same stimulus. The differences have stimulated proposals of different mechanisms to account for the experimentally observed variation. Using a computational approach that allows for introduction of structural and electrophysiological heterogeneity, we systematically tested variations in both arteriolar electrophysiology and modes of stimuli. Within the same vessel, our simulations show that conduction efficacy is influenced by the type of cell being stimulated and, in case of depolarization, by the stimulation strength. Particularly, simultaneous stimulation of both endothelial and vascular smooth muscle cells augments conduction. Between vessels, the specific electrophysiology determines membrane resistance and conduction efficiency-notably depolarization or radial currents reduce electrical spread. Random cell-cell variation, ubiquitous in biological systems, only cause small or no reduction in conduction efficiency. Collectively, our simulations can explain why CVRs from hyperpolarizing stimuli tend to conduct longer than CVRs from depolarizing stimuli and why agonists like acetylcholine induce CVRs that tend to conduct longer than electrical injections. The findings demonstrate that although substantial heterogeneity is observed in conducted responses, it can be largely ascribed to the origin of electrical stimulus combined with the specific electrophysiological properties of the arteriole. We conclude by outlining a set of {"}principles of electrical conduction{"} in the microcirculation.",
author = "Hald, {Bj{\o}rn Olav} and Welsh, {Donald G.} and Niels-Henrik Holstein-Rathlou and Jacobsen, {Jens Christian Brings}",
year = "2015",
month = "10",
doi = "10.1007/s00424-014-1649-1",
language = "English",
volume = "467",
pages = "2055--2067",
journal = "Pfl{\"u}gers Archiv - European Journal of Physiology",
issn = "0031-6768",
publisher = "Springer",
number = "10",

}

RIS

TY - JOUR

T1 - Origins of variation in conducted vasomotor responses

AU - Hald, Bjørn Olav

AU - Welsh, Donald G.

AU - Holstein-Rathlou, Niels-Henrik

AU - Jacobsen, Jens Christian Brings

PY - 2015/10

Y1 - 2015/10

N2 - Regulation of blood flow in the microcirculation depends on synchronized vasomotor responses. The vascular conducted response is a synchronous dilatation or constriction, elicited by a local electrical event that spreads along the vessel wall. Despite the underlying electrical nature, however, the efficacy of conducted responses varies significantly between different initiating stimuli within the same vascular bed as well as between different vascular beds following the same stimulus. The differences have stimulated proposals of different mechanisms to account for the experimentally observed variation. Using a computational approach that allows for introduction of structural and electrophysiological heterogeneity, we systematically tested variations in both arteriolar electrophysiology and modes of stimuli. Within the same vessel, our simulations show that conduction efficacy is influenced by the type of cell being stimulated and, in case of depolarization, by the stimulation strength. Particularly, simultaneous stimulation of both endothelial and vascular smooth muscle cells augments conduction. Between vessels, the specific electrophysiology determines membrane resistance and conduction efficiency-notably depolarization or radial currents reduce electrical spread. Random cell-cell variation, ubiquitous in biological systems, only cause small or no reduction in conduction efficiency. Collectively, our simulations can explain why CVRs from hyperpolarizing stimuli tend to conduct longer than CVRs from depolarizing stimuli and why agonists like acetylcholine induce CVRs that tend to conduct longer than electrical injections. The findings demonstrate that although substantial heterogeneity is observed in conducted responses, it can be largely ascribed to the origin of electrical stimulus combined with the specific electrophysiological properties of the arteriole. We conclude by outlining a set of "principles of electrical conduction" in the microcirculation.

AB - Regulation of blood flow in the microcirculation depends on synchronized vasomotor responses. The vascular conducted response is a synchronous dilatation or constriction, elicited by a local electrical event that spreads along the vessel wall. Despite the underlying electrical nature, however, the efficacy of conducted responses varies significantly between different initiating stimuli within the same vascular bed as well as between different vascular beds following the same stimulus. The differences have stimulated proposals of different mechanisms to account for the experimentally observed variation. Using a computational approach that allows for introduction of structural and electrophysiological heterogeneity, we systematically tested variations in both arteriolar electrophysiology and modes of stimuli. Within the same vessel, our simulations show that conduction efficacy is influenced by the type of cell being stimulated and, in case of depolarization, by the stimulation strength. Particularly, simultaneous stimulation of both endothelial and vascular smooth muscle cells augments conduction. Between vessels, the specific electrophysiology determines membrane resistance and conduction efficiency-notably depolarization or radial currents reduce electrical spread. Random cell-cell variation, ubiquitous in biological systems, only cause small or no reduction in conduction efficiency. Collectively, our simulations can explain why CVRs from hyperpolarizing stimuli tend to conduct longer than CVRs from depolarizing stimuli and why agonists like acetylcholine induce CVRs that tend to conduct longer than electrical injections. The findings demonstrate that although substantial heterogeneity is observed in conducted responses, it can be largely ascribed to the origin of electrical stimulus combined with the specific electrophysiological properties of the arteriole. We conclude by outlining a set of "principles of electrical conduction" in the microcirculation.

U2 - 10.1007/s00424-014-1649-1

DO - 10.1007/s00424-014-1649-1

M3 - Journal article

VL - 467

SP - 2055

EP - 2067

JO - Pflügers Archiv - European Journal of Physiology

JF - Pflügers Archiv - European Journal of Physiology

SN - 0031-6768

IS - 10

ER -

ID: 135658716