1
|
Anton EL, Fernandes D, Assreuy J, da Silva-Santos JE. Bradykinin increases BP in endotoxemic rat: functional and biochemical evidence of angiotensin II AT 1 /bradykinin B 2 receptor heterodimerization. Br J Pharmacol 2019; 176:2608-2626. [PMID: 30945263 DOI: 10.1111/bph.14685] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 03/19/2019] [Accepted: 03/21/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND AND PURPOSE Bradykinin may induce vasoconstriction in selected vessels or under specific experimental conditions. We hypothesized that inflammatory stimuli, such as endotoxin challenge, may induce the dimerization of AT1 /B2 receptors, altering the vascular effects of bradykinin. EXPERIMENTAL APPROACH Wistar rats received LPS (1 mg·kg-1 , i.p.) and were anaesthetized for assessment of BP. Mesenteric resistance arteries were used in organ baths and subjected to co-immunoprecipitation and Western blot analyses. KEY RESULTS At 24 and 48 hr after LPS, bradykinin-induced hypotension was followed by a sustained increase in BP, which was not found in non-endotoxemic animals. The B2 receptor antagonist Hoe-140 fully blocked the responses to bradykinin. The pressor effect of bradykinin was not prevented by prazosin, an α1 -adrenoceptor antagonist, but it was inhibited by the AT1 receptor antagonist losartan or the Rho-kinase inhibitor Y-27632. Endotoxemic rats also displayed enhanced pressor responses to angiotensin II, which were blocked by Hoe-140. Co-immunoprecipitation isolated using anti-B2 or anti-AT1 receptor antibodies showed that resistance arteries presented augmented levels of the AT1 /B2 receptor complexes at 24 hr after LPS injection. The presence of AT1 /B2 receptor heterodimers did correlate with the development of losartan-sensitive contractile responses to bradykinin and potentiation of angiotensin II-induced contraction, which was prevented by Hoe-140. CONCLUSIONS AND IMPLICATIONS Endotoxin challenge is a stimulus for AT1 /B2 receptor heterodimerization in native vessels and shifts the B2 receptor-dependent vascular effect of bradykinin to a more complex pathway, which also depends on AT1 receptors and their intracellular signalling pathways.
Collapse
Affiliation(s)
- Elaine Leocádia Anton
- Department of Pharmacology, Laboratory of Cardiovascular Biology, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Daniel Fernandes
- Department of Pharmacology, Laboratory of Cardiovascular Biology, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Jamil Assreuy
- Department of Pharmacology, Laboratory of Cardiovascular Biology, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - José Eduardo da Silva-Santos
- Department of Pharmacology, Laboratory of Cardiovascular Biology, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| |
Collapse
|
2
|
Sharif NA, Klimko PG. Prostaglandin FP receptor antagonists: discovery, pharmacological characterization and therapeutic utility. Br J Pharmacol 2018; 176:1059-1078. [PMID: 29679483 DOI: 10.1111/bph.14335] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Revised: 03/19/2018] [Accepted: 03/28/2018] [Indexed: 12/19/2022] Open
Abstract
In contrast to the availability of potent and selective antagonists of several prostaglandin receptor types (including DP1 , DP2 , EP and TP receptors), there has been a paucity of well-characterized, selective FP receptor antagonists. The earliest ones included dimethyl amide and dimethyl amine derivatives of PGF2α , but these have failed to gain prominence. The fluorinated PGF2α analogues, AL-8810 and AL-3138, were subsequently discovered as competitive and non-competitive FP receptor antagonists respectively. Non-prostanoid structures, such as the thiazolidinone AS604872, the D-amino acid-based oligopeptide PDC31 and its peptidomimic analogue PDC113.824 came next, but the latter two are allosteric inhibitors of FP receptor signalling. AL-8810 has a sub-micromolar in vitro potency and ≥2 log unit selectivity against most other PG receptors when tested in several cell- and tissue-based functional assays. Additionally, AL-8810 has demonstrated therapeutic efficacy as an FP receptor antagonist in animal models of stroke, traumatic brain injury, multiple sclerosis, allodynia and endometriosis. Consequently, it appears that AL-8810 has become the FP receptor antagonist of choice. LINKED ARTICLES: This article is part of a themed section on Eicosanoids 35 years from the 1982 Nobel: where are we now? To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.8/issuetoc.
Collapse
Affiliation(s)
| | - Peter G Klimko
- Novartis Pharmaceuticals Corporation, Fort Worth, TX, 76134, USA
| |
Collapse
|
3
|
Song K, Li L, Sun G, Wei Y. MicroRNA-381 regulates the occurrence and immune responses of coronary atherosclerosis via cyclooxygenase-2. Exp Ther Med 2018; 15:4557-4563. [PMID: 29725388 DOI: 10.3892/etm.2018.5947] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 06/05/2017] [Indexed: 01/08/2023] Open
Abstract
The present study aimed to measure the levels of microRNA-381 (miR-381) in the plaque tissues, peripheral blood mononuclear cells (PBMCs) and serum of patients with coronary atherosclerosis. In addition, the regulatory mechanisms of miR-381 and cyclooxygenase (COX)-2 in coronary atherosclerosis were investigated. A total of 36 patients with coronary atherosclerosis who received coronary endarterectomy at Linyi People's Hospital and Junan Hospital of Traditional Chinese Medicine (Linyi, China) between January 2013 and June 2016 were enrolled into the present study, while 39 healthy subjects were included as the control group. Peripheral blood was collected form all patients and healthy subjects. Plaque tissues were resected from patients with coronary atherosclerosis and adjacent artery intimal tissues were resected as the control tissues. Using quantitative polymerase chain reaction, the levels of miR-381 and COX-2 mRNA in the plaque tissues, PBMCs and serum were determined. In addition, COX-2 protein expression in the plaque tissues and PBMCs was measured by western blotting, while enzyme-linked immunosorbent assay was utilized to examine the protein content in the serum. To identify the direct interaction between miR-381 and COX-2 mRNA, dual-luciferase reporter assay was also conducted. The levels of COX-2 mRNA and protein in the plaque tissues, PBMCs and serum of patients with coronary atherosclerosis were significantly elevated compared with those in the corresponding control groups. However, the expression of miR-381 was significantly reduced in the coronary atherosclerosis patients. Dual-luciferase reporter assay revealed that miR-381 was able to directly target the 3'-untranslated region of COX-2 mRNA to regulate the expression of COX-2. Therefore, the present study demonstrated that enhanced levels of COX-2 expression in patients with coronary atherosclerosis are associated with the downregulation of miR-381 expression, while miR-381 may regulate the occurrence and immune responses of coronary atherosclerosis via COX-2.
Collapse
Affiliation(s)
- Kaiyou Song
- Department of Cardiology, Linyi People's Hospital, Linyi, Shandong 276003, P.R. China
| | - Lianting Li
- Department of Cardiology, Linyi People's Hospital, Linyi, Shandong 276003, P.R. China.,Department of Internal Medicine, Junan Hospital of Traditional Chinese Medicine, Linyi, Shandong 276600, P.R. China
| | - Guiling Sun
- Department of Cardiology, Linyi People's Hospital, Linyi, Shandong 276003, P.R. China
| | - Yanjin Wei
- Department of Cardiology, Linyi People's Hospital, Linyi, Shandong 276003, P.R. China
| |
Collapse
|
4
|
Pál É, Hadjadj L, Fontányi Z, Monori-Kiss A, Mezei Z, Lippai N, Magyar A, Heinzlmann A, Karvaly G, Monos E, Nádasy G, Benyó Z, Várbíró S. Vitamin D deficiency causes inward hypertrophic remodeling and alters vascular reactivity of rat cerebral arterioles. PLoS One 2018; 13:e0192480. [PMID: 29408903 PMCID: PMC5800593 DOI: 10.1371/journal.pone.0192480] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 01/24/2018] [Indexed: 02/07/2023] Open
Abstract
Background and purpose Vitamin D deficiency (VDD) is a global health problem, which can lead to several pathophysiological consequences including cardiovascular diseases. Its impact on the cerebrovascular system is not well understood. The goal of the present work was to examine the effects of VDD on the morphological, biomechanical and functional properties of cerebral arterioles. Methods Four-week-old male Wistar rats (n = 11 per group) were either fed with vitamin D deficient diet or received conventional rat chow with per os vitamin D supplementation. Cardiovascular parameters and hormone levels (testosterone, androstenedione, progesterone and 25-hydroxyvitamin D) were measured during the study. After 8 weeks of treatment anterior cerebral artery segments were prepared and their morphological, biomechanical and functional properties were examined using pressure microangiometry. Resorcin-fuchsin and smooth muscle actin staining were used to detect elastic fiber density and smooth muscle cell counts in the vessel wall, respectively. Sections were immunostained for eNOS and COX-2 as well. Results VDD markedly increased the wall thickness, the wall-to-lumen ratio and the wall cross-sectional area of arterioles as well as the number of smooth muscle cells in the tunica media. As a consequence, tangential wall stress was significantly lower in the VDD group. In addition, VDD increased the myogenic as well as the uridine 5’-triphosphate-induced tone and impaired bradykinin-induced relaxation. Decreased eNOS and increased COX-2 expression were also observed in the endothelium of VDD animals. Conclusions VDD causes inward hypertrophic remodeling due to vascular smooth muscle cell proliferation and enhances the vessel tone probably because of increased vasoconstrictor prostanoid levels in young adult rats. In addition, the decreased eNOS expression results in endothelial dysfunction. These morphological and functional alterations can potentially compromise the cerebral circulation and lead to cerebrovascular disorders in VDD.
Collapse
Affiliation(s)
- Éva Pál
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
- * E-mail:
| | - Leila Hadjadj
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Zoltán Fontányi
- 2 Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Zsuzsanna Mezei
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Norbert Lippai
- Department of Pathology, Jász-Nagykun-Szolnok County Hetényi Géza Hospital, Szolnok, Hungary
| | - Attila Magyar
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Andrea Heinzlmann
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Gellért Karvaly
- Department of Laboratory Medicine, Semmelweis University, Budapest, Hungary
- Bionics Innovation Center, Budapest, Hungary
| | - Emil Monos
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - György Nádasy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Zoltán Benyó
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Szabolcs Várbíró
- 2 Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| |
Collapse
|
5
|
Lin X, Bernloehr C, Hildebrandt T, Stadler FJ, Doods H, Wu D. Kinin B1 receptor blockade and ACE inhibition attenuate cardiac postinfarction remodeling and heart failure in rats. Toxicol Appl Pharmacol 2016; 305:153-160. [PMID: 27288733 DOI: 10.1016/j.taap.2016.06.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 05/18/2016] [Accepted: 06/06/2016] [Indexed: 10/21/2022]
Abstract
INTRODUCTION The aim of the present study was to evaluate the effects of the novel kinin B1 receptor antagonist BI113823 on postinfarction cardiac remodeling and heart failure, and to determine whether B1 receptor blockade alters the cardiovascular effects of an angiotensin 1 converting enzyme (ACE) inhibitor in rats. METHODS AND RESULTS Sprague Dawley rats were subjected to permanent occlusion of the left coronary artery. Cardiovascular function was determined at 6weeks postinfarction. Treatment with either B1 receptor antagonist (BI113823) or an ACE inhibitor (lisinopril) alone or in combination significantly reduced the heart weight-to-body weight and lung weight-to-body weight ratios, and improved postinfarction cardiac function as evidenced by greater cardiac output, the maximum rate of left ventricular pressure rise (±dP/dtmax), left ventricle ejection fraction, fractional shorting, better wall motion, and attenuation of elevated left ventricular end diastolic pressure (LVEDP). Furthermore, all three treatment groups exhibited significant reduction in cardiac interstitial fibrosis, collagen deposition, CD68 positive macrophages, neutrophils, and proinflammatory cytokine production (TNF-α and IL-1β), compared to vehicle controls. CONCLUSION The present study shows that treatment with the novel kinin B1 receptor antagonist, BI113823, reduces postinfarction cardiac remodeling and heart failure, and does not influence the cardiovascular effects of the ACE inhibitor.
Collapse
Affiliation(s)
- Xinchun Lin
- Department of Research, Mount Sinai Medical Center, Miami Beach, FL 33140, USA
| | | | | | - Florian J Stadler
- Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Shenzhen 518060, PR China.
| | - Henri Doods
- Boehringer Ingelheim Pharma GmbH & Co.KG, Biberach, Germany
| | - Dongmei Wu
- Department of Research, Mount Sinai Medical Center, Miami Beach, FL 33140, USA; Department of BIN Convergence Technology, Chonbuk National University, South Korea.
| |
Collapse
|
6
|
More AS, Kim HM, Khang G, Hildebrandt T, Bernlöhr C, Doods H, Vanhoutte PM, Wu D. Des-Arg9-bradykinin causes kinin B1 receptor mediated endothelium-independent contractions in endotoxin-treated porcine coronary arteries. Pharmacol Res 2014; 90:18-24. [DOI: 10.1016/j.phrs.2014.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 09/12/2014] [Accepted: 09/12/2014] [Indexed: 10/24/2022]
|