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Lu C, Zhang L, Chen X, Wan H, Dong H. Cl - induces endothelium-dependent mesenteric arteriolar vasorelaxation through the NKCC1/TRPV4/NCX axis. Life Sci 2023; 330:121942. [PMID: 37451399 DOI: 10.1016/j.lfs.2023.121942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/10/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
AIMS Although absorbed NaCl increases intestinal blood flow to facilitate absorption and transportation, it is unclear if it can directly mediate mesenteric arterial relaxation. We aimed to investigate and test our hypothesis that Cl- induces mesenteric arterial vasorelaxation via endothelium-dependent hyperpolarization (EDH). MAIN METHODS We used wire myograph to study NaCl-induced vasorelaxation of mesenteric arteries isolated from mice. Cl-, Ca2+ and K+ imaging was performed in human vascular endothelial cells pre-treated with pharmacological agents. KEY FINDINGS The Cl- concentration-dependently induced vasorelaxation of mesenteric arteries likely through EDH. The Cl--induced vasorelaxation was attenuated in TRPV4 KO mice and inhibited by selective blockers of Na+-K+-2Cl- cotransporter 1 (NKCC1) (bumetanide, 10 μM), transient receptor potential vanilloid 4 (TRPV4) (RN-1734, 40 μM), and small conductance Ca2+-activated K+ channels (SKCa) (apamin, 3 μM)/ intermediate conductance Ca2+-activated K+ channels (IKCa) (TRAM-34, 10 μM) and myoendothelial gap junction (18α-glycyrrhetinic acid, 10 μM), but enhanced by a selective activator of IKCa/SKCa (SKA-31, 0.3 μM). Cl- decreased intracellular K+ concentrations in endothelial cells, which was reversed by apamin (200 nM) plus TRAM-34 (500 nM). Extracellular Cl- raised intracellular Cl- concentrations in endothelial cells, which was attenuated by bumetanide (10 μM). Finally, Cl- induced a transient Ca2+ signaling via TRPV4 in endothelial cells, which became sustained when the Ca2+ exit mode of Na+-Ca2+ exchanger (NCX) was blocked. SIGNIFICANCE Cl- induces a pure EDH-mediated vasorelaxation of mesenteric arteries through activation of endothelial NKCC1/TRPV4/NCX axis. We have provided a novel insight into the role of Cl--induced vasorelaxation via EDH mechanism.
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Affiliation(s)
- Cheng Lu
- Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, #1 Ningde Road, Qingdao 266073, China; Department of Gastroenterology, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Luyun Zhang
- Department of Pediatric Intensive Care Unit, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
| | - Xiongying Chen
- Department of Pediatric Intensive Care Unit, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
| | - Hanxing Wan
- Department of Gastroenterology, Xinqiao Hospital, Army Medical University, Chongqing 400037, China.
| | - Hui Dong
- Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, #1 Ningde Road, Qingdao 266073, China; Department of Gastroenterology, Xinqiao Hospital, Army Medical University, Chongqing 400037, China.
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Dos Reis Costa DEF, de Araújo NF, Nóbrega NRC, de Assis Rabelo Ribeiro N, de Oliveira ACC, Dos Santos Aggum Capettini L, Ferreira AVM, Bonaventura D. Contribution of RAS, ROS and COX-1-derived prostanoids to the contractile profile of perivascular adipose tissue in cafeteria diet-induced obesity. Life Sci 2022; 309:120994. [PMID: 36155180 DOI: 10.1016/j.lfs.2022.120994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/08/2022] [Accepted: 09/20/2022] [Indexed: 12/01/2022]
Abstract
AIMS Obesity can lead to the loss of the anticontractile properties of perivascular adipose tissue (PVAT). Given that cafeteria (CAF) diet reflects the variety of highly calorie and easily accessible foods in Western societies, contributing to obesity and metabolic disorders, we sought to investigate the impact of CAF diet on PVAT vasoactive profile and the involvement of renin-angiotensin system, oxidative stress, and cyclooxygenase pathway. MAIN METHODS Male Balb/c mice received standard or CAF diet for 4 weeks. Oral glucose tolerance and insulin sensitivity tests were performed, and fasting serum glucose, cholesterol and triglyceride parameters were determined. Vascular reactivity, fluorescence and immunofluorescence analyzes were carried out in intact thoracic aorta in the presence or absence of PVAT. KEY FINDINGS CAF diet was effective in inducing obesity and metabolic disorders, as demonstrated by increased body weight gain and adiposity index, hyperlipidemia, hyperglycemia, glucose intolerance and insulin insensitivity. Importantly, CAF diet led to a significant decrease in aortic contractility which was restored in the presence of PVAT, exhibiting therefore a contractile profile. The contractile effect of PVAT was associated with the activation of AT1 receptor, reactive oxygen species, cyclooxygenase-1, thromboxane A2 and prostaglandin E2 receptors. SIGNIFICANCE These findings suggest that the contractile profile of PVAT involving the renin-angiotensin system activation, reactive oxygen species and cyclooxygenase-1 metabolites may be a protective compensatory adaptive response during early stage of CAF diet-induced obesity as an attempt to restore the impaired vascular contraction observed in the absence of PVAT, contributing to the maintenance of vascular tone.
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Affiliation(s)
| | - Natália Ferreira de Araújo
- Laboratory of Vascular Pharmacology, Department of Pharmacology, Biological Sciences Institute, Federal University of Minas Gerais, Brazil
| | - Natália Ribeiro Cabacinha Nóbrega
- Laboratory of Vascular Pharmacology, Department of Pharmacology, Biological Sciences Institute, Federal University of Minas Gerais, Brazil
| | - Naiara de Assis Rabelo Ribeiro
- Laboratory of Vascular Pharmacology, Department of Pharmacology, Biological Sciences Institute, Federal University of Minas Gerais, Brazil
| | - Amanda Carla Clemente de Oliveira
- Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Biological Sciences Institute, Federal University of Minas Gerais, Brazil
| | | | - Adaliene Versiani Matos Ferreira
- Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Biological Sciences Institute, Federal University of Minas Gerais, Brazil
| | - Daniella Bonaventura
- Laboratory of Vascular Pharmacology, Department of Pharmacology, Biological Sciences Institute, Federal University of Minas Gerais, Brazil.
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Westhoff J, Weismüller K, Koch C, Mann V, Weigand MA, Henrich M. Vasomotion of mice mesenteric arteries during low oxygen levels. Eur J Med Res 2018; 23:38. [PMID: 30144829 PMCID: PMC6109325 DOI: 10.1186/s40001-018-0335-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 08/18/2018] [Indexed: 12/16/2022] Open
Abstract
Background Ischemia of intestinal organs is a main cause of complications in surgical intensive care patients. Changes in the tonus of arteries contributing to vascular resistance play an important role in the determination of blood flow and thus oxygen supply of various abdominal organs. It is generally acknowledged that hypoxia itself is able to alter arterial tonus and thus blood flow. Methods The present study compared the effects of various degrees of hypoxia on second-order mesenteric arteries from male C57BL/6J mice. After vessel isolation and preparation, we assessed vessel diameter using an arteriograph perfusion chamber. Investigating mechanisms promoting hypoxia-induced vasodilatation, we performed experiments in Ca2+-containing and Ca2+-free solutions, and furthermore, Ca2+-influx was inhibited by NiCl2, eNOS−/−-, and TASK1−/−-mice were investigated too. Results Mild hypoxia 14.4% O2 induced, in 50% of mesenteric artery segments from wild-type (wt) mice, a vasodilatation; severe hypoxia recruited further segments responding with vasodilatation reaching 80% under anoxia. However, the extension of dilatation of luminal arterial diameter reduced from 1.96% ± 0.55 at 14.4% O2 to 0.68% ± 0.13 under anoxia. Arteries exposed to hypoxia in Ca2+-free solution responded to lower oxygen levels with increasing degree of vasodilatation (0.85% ± 0.19 at 14.4% O2 vs. 1.53% ± 0.42 at 2.7% O2). Inhibition of voltage-gated Ca2+-influx using NiCl2 completely diminished hypoxia-induced vasodilatation. Instead, all arterial segments investigated constricted. Furthermore, we did not observe altered hypoxia-induced vasomotion in eNOS−/−- or TASK1−/− mice compared to wt animals. Conclusions The present study demonstrated that hypoxic vasodilatation in mice mesenteric arteries is mediated by a NO-independent mechanism. In this experimental setting, we found evidence for Ca2+-mediated activation of ion channels causing hypoxic vasodilatation. Electronic supplementary material The online version of this article (10.1186/s40001-018-0335-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- J Westhoff
- Department of Anesthesiology and Intensive Care Medicine, Justus-Liebig University Giessen, Rudolph-Buchheimstr. 7, 35392, Giessen, Germany
| | - K Weismüller
- Department of Anesthesiology and Intensive Care Medicine, Justus-Liebig University Giessen, Rudolph-Buchheimstr. 7, 35392, Giessen, Germany
| | - C Koch
- Department of Anesthesiology and Intensive Care Medicine, Justus-Liebig University Giessen, Rudolph-Buchheimstr. 7, 35392, Giessen, Germany
| | - V Mann
- Department of Anesthesiology and Intensive Care Medicine, Justus-Liebig University Giessen, Rudolph-Buchheimstr. 7, 35392, Giessen, Germany
| | - M A Weigand
- Department of Anesthesiology and Intensive Care Medicine, Heidelberg University Hospital, Im Neuenheimer Feld 110, 69120, Heidelberg, Germany
| | - M Henrich
- Department of Anesthesiology and Intensive Care Medicine, Justus-Liebig University Giessen, Rudolph-Buchheimstr. 7, 35392, Giessen, Germany. .,Department of Anesthesiology and Intensive Care Medicine, St. Vincentius Clinic Karlsruhe, Steinhaeuserstr. 18, 76135, Karlsruhe, Germany.
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Rafique Y, AlBader M, Oriowo M. Attenuation of the anti-contractile effect of cooling in the rat aorta by perivascular adipose tissue. AUTONOMIC & AUTACOID PHARMACOLOGY 2017; 37:52-60. [PMID: 28869322 DOI: 10.1111/aap.12058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 06/07/2017] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
In addition to providing mechanical support for blood vessels, the perivascular adipose tissue (PVAT) secretes a number of vasoactive substances and exerts an anticontractile effect. The main objective of this study was to find out whether the anticontractile effect of cooling in the rat aorta is affected by PVAT. Our hypothesis was that PVAT would enhance the anticontractile effect of cooling in the rat aorta. Aorta segments, with or without PVAT, were used in this investigation. Cumulative concentration-response curves were established for phenylephrine at 37°C or 24°C. Phenylephrine (10-9 M - 10-5 M) induced concentration-dependent contractions of aorta segments with or without PVAT at 37°C. The maximum response, but not pD2 value, was reduced in aorta segments with PVAT. Cooling the tissues to 24 °C resulted in a significant reduction in the maximum response in aorta segments without PVAT with no change in pD2 values. However, the anticontractile effect of cooling was attenuated in the presence of PVAT with no significant (p > 0.05) change in either the maximum response or pD2 value. L-NAME potentiated PE-induced contractions and this was greater in aorta segments without PVAT at both temperatures. The expression of eNOS protein and basal tissue level of nitric oxide (NO) were greater in aorta segments with PVAT at both temperatures. However, PE significantly increased tissue levels of NO only in aorta segments without PVAT. We concluded that PVAT-induced loss of anticontractile effect of cooling against PE-induced contractions could be due to impaired generation of NO in aorta segments with PVAT.
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Affiliation(s)
- Y Rafique
- Pharmacology & Toxicology Department, Health Sciences Centre, Kuwait University, Kuwait, Kuwait
| | - M AlBader
- Pharmacology & Toxicology Department, Health Sciences Centre, Kuwait University, Kuwait, Kuwait
| | - M Oriowo
- Pharmacology & Toxicology Department, Health Sciences Centre, Kuwait University, Kuwait, Kuwait
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Van de Voorde J, Pauwels B, Boydens C, Decaluwé K. Adipocytokines in relation to cardiovascular disease. Metabolism 2013; 62:1513-21. [PMID: 23866981 DOI: 10.1016/j.metabol.2013.06.004] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 06/05/2013] [Accepted: 06/06/2013] [Indexed: 01/22/2023]
Abstract
Adipose tissue can be considered as a huge gland producing paracrine and endocrine hormones, the adipo(cyto)kines. There is growing evidence that these adipo(cyto)kines may link obesity to cardiovascular diseases. The excessive adipocyte hypertrophy in obesity induces hypoxia in adipose tissue. This leads to adiposopathy, the process that converts "healthy" adipose tissue to "sick" adipose tissue. This is accompanied by a change in profile of adipo(cyto)kines released, with less production of the "healthy" adipo(cyto)kines such as adiponectin and omentin and more release of the "unhealthy" adipo(cyto)kines, ultimately leading to the development of cardiovascular diseases. The present review provides a concise and general overview of the actual concepts of the role of adipo(cyto)kines in endothelial dysfunction, hypertension, atherosclerosis and heart diseases. The knowledge of these concepts may lead to new tools to improve health in the next generations.
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Affiliation(s)
- Johan Van de Voorde
- Department of Pharmacology, Vascular Research Unit, Ghent University, Belgium.
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Affiliation(s)
- M. Nikinmaa
- Department of Biology; University of Turku; Turku; Finland
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Affiliation(s)
- P. B. Persson and
- Institute of Vegetative Physiology; Charité-Universitaetsmedizin Berlin; Berlin; Germany
| | - A. Bondke Persson
- Institute of Vegetative Physiology; Charité-Universitaetsmedizin Berlin; Berlin; Germany
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Abstract
Adipokines secreted by visceral, subcutaneous, and perivascular adipocytes are involved in the regulation of vascular tone by acting as circulatory hormones (leptin, adiponectin, omentin, visfatin, angiotensin II, resistin, tumor necrosis factor-α, interleukin-6, apelin) and/or via local paracrine factors (perivascular adipocyte-derived relaxing and contractile factors). Vascular tone regulation by adipokines is compromised in obesitas and obesity-related disorders. Hypoxia created in growing adipose tissue dysregulates synthesis of vasoactive adipokines in favor of harmful proinflammatory adipokines, while the levels of the cardioprotective adipokines adiponectin and omentin decrease. Considering the potential of the role of adipokines in obesity-related vascular diseases, strategies to counter these diseases by targeting the adipokines are discussed.
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