Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\29104545
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Physiol
2017 ; 8
(ä): 824
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The Adenosine Hypothesis Revisited: Modulation of Coupling between Myocardial
Perfusion and Arterial Compliance
#MMPMID29104545
Dobson GP
; Arsyad A
; Letson HL
Front Physiol
2017[]; 8
(ä): 824
PMID29104545
show ga
For over four decades the thoracic aortic ring model has become one of the most
widely used methods to study vascular reactivity and electromechanical coupling.
A question that is rarely asked, however, is what function does a drug-mediated
relaxation (or contraction) in this model serve in the intact system? The
physiological significance of adenosine relaxation in rings isolated from large
elastic conduit arteries from a wide range of species remains largely unknown. We
propose that adenosine relaxation increases aortic compliance in acute stress
states and facilitates ventricular-arterial (VA) coupling, and thereby links
compliance and coronary artery perfusion to myocardial energy metabolism. In 1963
Berne argued that adenosine acts as a local negative feedback regulator between
oxygen supply and demand in the heart during hypoxic/ischemic stress. The
adenosine VA coupling hypothesis extends and enhances Berne's "adenosine
hypothesis" from a local regulatory scheme in the heart to include conduit
arterial function. In multicellular organisms, evolution may have selected
adenosine, nitric oxide, and other vascular mediators, to modulate VA coupling
for optimal transfer of oxygen (and nutrients) from the lung, heart, large
conduit arteries, arterioles and capillaries to respiring mitochondria. Finally,
a discussion of the potential clinical significance of adenosine modulation of VA
coupling is extended to vascular aging and disease, including hypertension,
diabetes, obesity, coronary artery disease and heart failure.