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Related Concept Videos

Nitric Oxide Signaling Pathway01:28

Nitric Oxide Signaling Pathway

Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure to...
Antihypertensive Drugs: Vasodilators01:23

Antihypertensive Drugs: Vasodilators

Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
GPCRs Regulate Adenylyl Cylase Activity01:09

GPCRs Regulate Adenylyl Cylase Activity

Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of cells.
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Paracrine Signaling01:21

Paracrine Signaling

Paracrine signaling allows cells to communicate with their immediate neighbors via secretion of signaling molecules. Such a signal can only trigger a response in nearby target cells because the signal molecules degrade quickly or are inactivated if not taken up. Prominent examples of paracrine signaling include nitric oxide signaling in blood vessels, synaptic signaling of neurons, the blood clotting system, tissue repair/wound healing, and local allergic skin reactions. Nitric oxide as a...
Adrenergic Receptors: ɑ Subtype01:31

Adrenergic Receptors: ɑ Subtype

Adrenoceptors are classified into α and ꞵ classes based on their potencies to catecholamine agonists. α-adrenoceptors show the following order of catecholamine potency:
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Adrenergic Receptors: β Subtype

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Glycine Receptor α2 Mediates Vasodilation via Endothelial eNOS Signaling.

Xueya Bai1,2, Yan Wang1,3, Wenying Zhou1,4

  • 1Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease and Molecular Intervention (X.B., Y.W., W.Z., Y.Y., Y.D., J.L., H.B., Q.Y., B.J., J.B., H.Z., X.L., Xudong Zhu, Qi Chen), Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, China.

Circulation Research
|June 19, 2026
PubMed
Summary
This summary is machine-generated.

Glycine receptor alpha 2 subunit (GLRA2) in endothelial cells plays a key role in blood pressure regulation. Activating GLRA2 with glycine helps counteract hypertension by promoting nitric oxide (NO) production.

Keywords:
blood pressureendotheliumglycinehypertensionvasodilator agents

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Area of Science:

  • Vascular Biology
  • Cardiovascular Physiology
  • Molecular Medicine

Background:

  • Endothelium-derived nitric oxide (NO) is crucial for vascular homeostasis.
  • Regulation of endothelial nitric oxide synthase (eNOS) in hypertension remains incompletely understood.
  • The role of the α2 subunit of glycine receptor (GLRA2) in vascular function is under investigation.

Purpose of the Study:

  • To investigate the role of endothelial GLRA2 in blood pressure regulation.
  • To elucidate the mechanism by which GLRA2 modulates eNOS signaling.
  • To explore GLRA2 as a potential therapeutic target for hypertension.

Main Methods:

  • Generation of endothelial-specific Glra2-deficient mice.
  • Adeno-associated viral transfection for GLRA2 modulation.
  • Assessment of endothelium-dependent relaxation and whole-cell patch clamp recordings.

Main Results:

  • GLRA2 is selectively expressed in arterial endothelial cells.
  • Glycine activation of GLRA2 counteracts hypertension and promotes NO production.
  • GLRA2 activates the AKT/eNOS pathway via glycogen synthase kinase-3β phosphorylation.

Conclusions:

  • A novel endothelial GLRA2 pathway is identified.
  • This pathway is critical for NO production and blood pressure control.
  • Endothelial GLRA2 represents a promising target for hypertension management.