3-Hydroxy-3-methylglutaryl coenzyme A reductase inhibitors (statins) may exert pleiotropic effects on vascular cells independent of lowering plasma cholesterol. To elucidate the molecular mechanisms involved in these effects, we investigated the impact of statins on production of reactive oxygen species (ROS) in rat aortic vascular smooth muscle cells (VSMC). Exposure of VSMC to angiotensin II ...

Impairment of health after overcoming the acute phase COVID-19 is being observed more and frequently. Here different symptoms neurological and/or cardiological origin have been reported. With symptoms, which are very similar to ones reported but not caused by SARS-CoV-2, occurrence functionally active autoantibodies (fAABs) targeting G-protein coupled receptors (GPCR-fAABs) has discussed be inv...

AIM To determine the role of AT1 receptor in the rostral ventrolateral medulla (RVLM) in mediating the blunted baroreceptor reflex in spontaneously hypertensive rats (SHR). METHODS Intravenous injections of graded doses of phenylephrine (1, 5, 10, 20, and 40 microg/kg) increased the blood pressure to elicit the baroreceptor reflex in both SHR and normotensive Wistar rats anesthetized with ure...

Biased agonism on the type I angiotensin receptor (AT1-R) can achieve different outcomes via activation of G protein-dependent and -independent cellular responses. In this study, we investigated whether the biased activation of AT1-R can lead to different regulation and intracellular processing of the receptor. We analyzed β-arrestin binding, endocytosis, and subsequent trafficking steps, such ...

Du, Yong, Jingxin Qiu, Sharon H. Nelson, and Donna H. Wang. Regulation of type 1 ANG II receptor in vascular tissue: role of a1-adrenoreceptor. Am. J. Physiol. 273 (Regulatory Integrative Comp. Physiol. 42): R1224–R1229, 1997.— Angiotensin II (ANG II) and norepinephrine (NE) are important regulators of vascular function and structure. Recent studies showed that there are multiple interactions b...

Immune mechanisms and the renin-angiotensin system are implicated in preeclampsia. We investigated 25 preeclamptic patients and compared them with 12 normotensive pregnant women and 10 pregnant patients with essential hypertension. Antibodies were detected by the chronotropic responses to AT1 receptor-mediated stimulation of cultured neonatal rat cardiomyocytes coupled with receptor-specific an...

Coronaviruses (CoVs) are a group of viruses that induce infection in the respiratory and other systems in the human body. There are two coronaviruses that transmitted from animals to humans including severe acute respiratory syndrome (SARS) and the Middle East respiratory syndrome (MERS) (1). The novel coronavirus that appeared at first in Wuhan, China, in December 2019 was named as severe acut...

The renin-angiotensin and endothelin systems regulate blood pressure, in part, by affecting renal tubular sodium transport. In rodents, ETB receptors decrease proximal tubular reabsorption, whereas AT1 receptors produce the opposite effect. We hypothesize that ETB and AT1 receptors interact at the receptor level, and that the interaction is altered in spontaneously hypertensive rats (SHRs). In ...

The dopaminergic and renin-angiotensin systems interact to regulate blood pressure. Disruption of the D4 dopamine receptor gene in mice produces hypertension that is associated with increased renal angiotensin type 1 (AT1) receptor expression. We hypothesize that the D4 receptor can inhibit AT1 receptor expression and function in renal proximal tubule cells from Wistar-Kyoto (WKY) rats, but the...

Strehlow, Kerstin, Georg Nickenig, Jörg Roeling, Sven Wassmann, Oliver Zolk, Andreas Knorr, and Michael Böhm. AT1 receptor regulation in salt-sensitive hypertension. Am. J. Physiol. 277 (Heart Circ. Physiol. 46): H1701– H1707, 1999.—The molecular events governing salt-sensitive hypertension are currently unknown. Because the reninANG system plays a central role in blood pressure regulation and ...