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Titolo:
THE ROLE OF THE MEMBRANE-POTENTIAL OF ENDOTHELIAL AND SMOOTH-MUSCLE CELLS IN THE REGULATION OF CORONARY BLOOD-FLOW
Autore:
DAUT J; STANDEN NB; NELSON MT;
Indirizzi:
TECH UNIV MUNICH,INST PHYSIOL,BIEDERSTEINER STR 29 D-80802 MUNICH GERMANY UNIV LEICESTER,DEPT PHYSIOL LEICESTER LEICS ENGLAND UNIV VERMONT,DEPT PHARMACOL COLCHESTER VT 00000
Titolo Testata:
Journal of cardiovascular electrophysiology
fascicolo: 2, volume: 5, anno: 1994,
pagine: 154 - 181
SICI:
1045-3873(1994)5:2<154:TROTMO>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTIVATED POTASSIUM CHANNELS; SENSITIVE K+ CHANNELS; RABBIT MESENTERIC-ARTERY; GUINEA-PIG HEART; NONSELECTIVE CATION CHANNEL; STIMULATED CALCIUM INFLUX; FROG SKELETAL-MUSCLE; RAT PORTAL-VEIN; PORCINE CORONARY; NITRIC-OXIDE;
Keywords:
CORONARY ARTERIES; VASODILATATION; CALCIUM CHANNELS; POTASSIUM CHANNELS; MYOGENIC TONE;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
232
Recensione:
Indirizzi per estratti:
Citazione:
J. Daut et al., "THE ROLE OF THE MEMBRANE-POTENTIAL OF ENDOTHELIAL AND SMOOTH-MUSCLE CELLS IN THE REGULATION OF CORONARY BLOOD-FLOW", Journal of cardiovascular electrophysiology, 5(2), 1994, pp. 154-181

Abstract

In the mammalian heart the supply of oxygen and energy-rich substrates through the coronary arterioles is continuously adapted to the variations of cardiac work. The coronary resistance arteries and the surrounding myocardium form a functional unit with multiple interactions between coronary endothelial cells, smooth muscle cells, perivascular nerves, and cardiac muscle cells. We describe the mechanisms underlying the electrical and chemical communication between the different cell types, the ionic channels contributing to the resting potential of endothelial and smooth muscle cells, and the mechanisms responsible for modulation of the resting potential. The main conclusion of our analysis is that the membrane potential of coronary endothelial and smooth muscle cells is one of the major determinants of coronary blood flow, and that modulation of the membrane potential provides a way to dilate or constrict coronary resistance arteries. It is proposed that the membrane potential of the myo-endothelial regulatory unit, i.e., of the endothelial cells and the underlying smooth muscle cells in the terminal arterioles, may function as an integrator of the numerous local and global vasodilator and constrictor signals that provide for the adaptation of coronary blood flow to the metabolic demands of the heart.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 18:04:28