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Direct Vascular Effects of Angiotensin II (A Systematic Short Review).
Int J Mol Sci
December 2024
Department of Physiology, Faculty of Medicine, Semmelweis University, 37-47 Tűzoltó Street, 1094 Budapest, Hungary.
The octapeptide angiotensin II (Ang II) is a circulating hormone as well as a locally formed agonist synthesized by the angiotensin-converting enzyme (ACE) of endothelial cells. It forms a powerful mechanism to control the amount and pressure of body fluids. All main effects are directed to save body salt and water and ensure blood pressure under basic conditions and in emergencies.
View Article and Find Full Text PDFA case of renovascular hypertension due to polyarteritis nodosa.
J Hypertens
January 2025
Hypertension Clinic of the Internal Medicine Department, Unidade Local de Saúde de São João.
In renal vasculitis, luminal narrowing can reduce blood flow and activate the renin-angiotensin-aldosterone system, causing renovascular hypertension. We present the case of a 47-year-old man with previous intestinal tuberculosis and episodes of lumbar pain, tender erythematous nodules and arthralgias. He had grade 3 hypertension, unresponsive to treatment, with left ventricular concentric hypertrophy and chronic kidney disease.
View Article and Find Full Text PDFVascular injury in glomerulopathies: the role of the endothelium.
Front Nephrol
December 2024
Renal Pathophysiology Laboratory, Hospital das Clínicas, University of São Paulo School of Medicine, São Paulo, Brazil.
In glomerulopathies, endothelial dysfunction and the presence of histological vascular lesions such as thrombotic microangiopathy, arteriolar hyalinosis, and arteriosclerosis are related to a severe clinical course and worse renal prognosis. The endothelial cell, which naturally has anti-inflammatory and anti-thrombotic regulatory mechanisms, is particularly susceptible to damage caused by various etiologies and can become dysfunctional due to direct/indirect injury or a deficiency of protective factors. In addition, endothelial regulation and protection involve participation of the complement system, factors related to angiogenesis, the renin-angiotensin system (RAS), endothelin, the glycocalyx, the coagulation cascade, interaction between these pathways, interactions between glomerular structures (the endothelium, mesangium, podocyte, and basement membrane) and interstitial structures (tubules, arterioles and small vessels).
View Article and Find Full Text PDFVasculo-Protective Effects of Standardized Black Chokeberry Extracts in Mice Aorta.
Int J Mol Sci
December 2024
Department III Functional Sciences-Pathophysiology, Faculty of Medicine, "Victor Babeș" University of Medicine and Pharmacy of Timișoara, E. Murgu Sq., No. 2, 300041 Timisoara, Romania.
Black chokeberry (
Alantolactone mitigates the elevation of blood pressure in mice induced by angiotensin II by inhibiting calcium channel activation.
BMC Cardiovasc Disord
January 2025
Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China.
Background: The dried root of Inula helenium L., known as Inulae Radix in Mongolian medicine, is a widely used heat-clearing plant drug within the Asteraceae family. Alantolactone (ATL), a compound derived from Inulae Radix, is a sesquiterpene lactone with a range of biological activities.
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