Techniques of Physician-Modified Endovascular Grafts (PMEGs) for Incorporation of Renal Mesenteric Arteries

2017 ◽  
pp. 671-688
Author(s):  
Gustavo S. Oderich ◽  
Mauricio S. Ribeiro
Keyword(s):  
Mesenteric Arteries ◽  
Endovascular Grafts

scholarly journals Oxygen-Sensitivity and Pulmonary Selectivity of Vasodilators as Potential Drugs for Pulmonary Hypertension

Antioxidants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 155
Author(s):  
Daniel Morales-Cano ◽  
Bianca Barreira ◽  
Beatriz De Olaiz Navarro ◽  
María Callejo ◽  
Gema Mondejar-Parreño ◽  
...  
Keyword(s):  
Pulmonary Hypertension ◽  
Gas Exchange ◽  
Pulmonary Circulation ◽  
Pulmonary Arteries ◽  
Blood Perfusion ◽  
Mesenteric Arteries ◽  
Oxygen Sensitivity ◽  
Low Oxygen ◽  
Oxygen Selectivity

Current approved therapies for pulmonary hypertension (PH) aim to restore the balance between endothelial mediators in the pulmonary circulation. These drugs may exert vasodilator effects on poorly oxygenated vessels. This may lead to the derivation of blood perfusion towards low ventilated alveoli, i.e., producing ventilation-perfusion mismatch, with detrimental effects on gas exchange. The aim of this study is to analyze the oxygen-sensitivity in vitro of 25 drugs currently used or potentially useful for PH. Additionally, the study analyses the effectiveness of these vasodilators in the pulmonary vs. the systemic vessels. Vasodilator responses were recorded in pulmonary arteries (PA) and mesenteric arteries (MA) from rats and in human PA in a wire myograph under different oxygen concentrations. None of the studied drugs showed oxygen selectivity, being equally or more effective as vasodilators under conditions of low oxygen as compared to high oxygen levels. The drugs studied showed low pulmonary selectivity, being equally or more effective as vasodilators in systemic than in PA. A similar behavior was observed for the members within each drug family. In conclusion, none of the drugs showed optimal vasodilator profile, which may limit their therapeutic efficacy in PH.

scholarly journals Differential Deleterious Impact of Highly Saturated Versus Monounsaturated Fat Intake on Vascular Function, Structure, and Mechanics in Mice

Nutrients ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 1003
Author(s):  
Elena Vega-Martín ◽  
Marta Gil-Ortega ◽  
Raquel González-Blázquez ◽  
Sara Benedito ◽  
Jesús Fernández-Felipe ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Arterial Stiffness ◽  
Thoracic Aorta ◽  
Vascular Function ◽  
Saturated Fatty Acids ◽  
Vascular Wall ◽  
Monounsaturated Fatty Acids ◽  
Mesenteric Arteries ◽  
Monounsaturated Fat ◽  
The Impact

Vegetable oils such as palm oil (enriched in saturated fatty acids, SFA) and high-oleic-acid sunflower oil (HOSO, containing mainly monounsaturated fatty acids, MUFA) have emerged as the most common replacements for trans-fats in the food industry. The aim of this study is to analyze the impact of SFA and MUFA-enriched high-fat (HF) diets on endothelial function, vascular remodeling, and arterial stiffness compared to commercial HF diets. Five-week-old male C57BL6J mice were fed a standard (SD), a HF diet enriched with SFA (saturated oil-enriched Food, SOLF), a HF diet enriched with MUFA (unsaturated oil-enriched Food, UOLF), or a commercial HF diet for 8 weeks. Vascular function was analyzed in the thoracic aorta. Structural and mechanical parameters were assessed in mesenteric arteries by pressure myography. SOLF, UOLF, and HF diet reduced contractile responses to phenylephrine and induced endothelial dysfunction in the thoracic aorta. A significant increase in the β-index, and thus in arterial stiffness, was also detected in mesenteric arteries from the three HF groups, due to enhanced deposition of collagen in the vascular wall. SOLF also induced hypotrophic inward remodeling. In conclusion, these data demonstrate a deleterious effect of HF feeding on obesity-related vascular alterations that is exacerbated by SFA.

Mechanisms of agonist-induced constriction in isolated human mesenteric arteries

2006 ◽  
Vol 44 (6) ◽  
pp. 427-433 ◽  
Author(s):  
Joanne Hall ◽  
T. Hugh Jones ◽  
Kevin S. Channer ◽  
Richard D. Jones
Keyword(s):  
Mesenteric Arteries

Endothelial dysfunction and arterial pressure regulation during early diabetes in mice: roles for nitric oxide and endothelium-derived hyperpolarizing factor

2007 ◽  
Vol 293 (2) ◽  
pp. R707-R713 ◽  
Author(s):  
Sharyn M. Fitzgerald ◽  
Barbara K. Kemp-Harper ◽  
Helena C. Parkington ◽  
Geoffrey A. Head ◽  
Roger G. Evans
Keyword(s):  
Nitric Oxide ◽  
Endothelial Dysfunction ◽  
Arterial Pressure ◽  
Early Stage ◽  
Mesenteric Arteries ◽  
No Production ◽  
Wild Type ◽  
Early Diabetes ◽  
Diabetes In Mice ◽  
Vehicle Treatment

We determined whether nitric oxide (NO) counters the development of hypertension at the onset of diabetes in mice, whether this is dependent on endothelial NO synthase (eNOS), and whether non-NO endothelium-dependent vasodilator mechanisms are altered in diabetes in mice. Male mice were instrumented for chronic measurement of mean arterial pressure (MAP). In wild-type mice, MAP was greater after 5 wk of Nω-nitro-l-arginine methyl ester (l-NAME; 100 mg·kg−1·day−1 in drinking water; 97 ± 3 mmHg) than after vehicle treatment (88 ± 3 mmHg). MAP was also elevated in eNOS null mice (113 ± 4 mmHg). Seven days after streptozotocin treatment (200 mg/kg iv) MAP was further increased in l-NAME-treated mice (108 ± 5 mmHg) but not in vehicle-treated mice (88 ± 3 mmHg) nor eNOS null mice (104 ± 3 mmHg). In wild-type mice, maximal vasorelaxation of mesenteric arteries to acetylcholine was not altered by chronic l-NAME or induction of diabetes but was reduced by 42 ± 6% in l-NAME-treated diabetic mice. Furthermore, the relative roles of NO and endothelium-derived hyperpolarizing factor (EDHF) in acetylcholine-induced vasorelaxation were altered; the EDHF component was enhanced by l-NAME and blunted by diabetes. These data suggest that NO protects against the development of hypertension during early-stage diabetes in mice, even in the absence of eNOS. Furthermore, in mesenteric arteries, diabetes is associated with reduced EDHF function, with an apparent compensatory increase in NO function. Thus, prior inhibition of NOS results in endothelial dysfunction in early diabetes, since the diabetes-induced reduction in EDHF function cannot be compensated by increases in NO production.

scholarly journals Neurogenic Contraction Induced by the Antiarrhythmic Compound, AVE 0118, in Rat Small Mesenteric Arteries

2014 ◽  
Vol 115 (4) ◽  
pp. 315-320 ◽  
Author(s):  
Attila Kun ◽  
György Seprényi ◽  
András Varró ◽  
Julius Gy. Papp ◽  
János Pataricza
Keyword(s):  
Mesenteric Arteries
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