Daily red wine consumption improves vascular function by a soluble guanylyl cyclase-dependent pathway

Area of Science:

• Cardiovascular Physiology
• Nutraceutical Research
• Endothelial Function

Background:

• Polyphenols in red wine are theorized to enhance endothelial function.
• This study investigated red wine's effect on in-vivo vascular function and endothelin-1 (ET-1) levels.
• Porcine coronary arteries (PCAs) were used to explore underlying mechanisms.

Purpose of the Study:

• To determine if daily red wine consumption improves vascular function.
• To assess the role of endothelin-1 (ET-1) in mediating red wine's vascular effects.
• To investigate additional pathways involved in red wine's impact on vascular function using PCAs.

Main Methods:

• Eighteen healthy women consumed red wine daily for three weeks.
• Vascular function was assessed via forearm blood flow (FBF) responses to acetylcholine (ACh) and sodium nitroprusside (SNP).
• PCAs were studied in organ baths with various vasodilators and red wine extract (RWE).

Main Results:

• Forearm blood flow (FBF) responses to ACh and SNP were enhanced after three weeks of red wine intake.
• Plasma ET-1 levels did not decrease after three weeks but showed an acute drop post-consumption.
• Red wine extract (RWE) induced relaxation in PCAs via an endothelium-, nitric oxide (NO)-, and soluble guanylyl cyclase (sGC)/guanosine-3',5'-cyclic monophosphate (cGMP)-dependent pathway.

Conclusions:

• Enhanced FBF response after three weeks of red wine consumption suggests a change in smooth muscle sensitivity.
• Alterations in sGC responsiveness/activity appear to be the primary mechanism, not changes in ET-1.
• The immediate effect of red wine on vascular function differs from the chronic effects observed after sustained consumption.