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Zhang J, Liu S, Ding W, Wan J, Qin JJ, Wang M. Resolution of inflammation, an active process to restore the immune microenvironment balance: A novel drug target for treating arterial hypertension. Ageing Res Rev 2024; 99:102352. [PMID: 38857706 DOI: 10.1016/j.arr.2024.102352] [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: 11/24/2023] [Revised: 05/11/2024] [Accepted: 05/27/2024] [Indexed: 06/12/2024]
Abstract
The resolution of inflammation, the other side of the inflammatory response, is defined as an active and highly coordinated process that promotes the restoration of immune microenvironment balance and tissue repair. Inflammation resolution involves several key processes, including dampening proinflammatory signaling, specialized proresolving lipid mediator (SPM) production, nonlipid proresolving mediator production, efferocytosis and regulatory T-cell (Treg) induction. In recent years, increasing attention has been given to the effects of inflammation resolution on hypertension. Furthermore, our previous studies reported the antihypertensive effects of SPMs. Therefore, in this review, we aim to summarize and discuss the detailed association between arterial hypertension and inflammation resolution. Additional, the association between gut microbe-mediated immune and hypertension is discussed. This findings suggested that accelerating the resolution of inflammation can have beneficial effects on hypertension and its related organ damage. Exploring novel drug targets by focusing on various pathways involved in accelerating inflammation resolution will contribute to the treatment and control of hypertensive diseases in the future.
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Affiliation(s)
- Jishou Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Department of Geriatrics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China; Department of Cardiology, Renmin Hospital of Wuhan University; Cardiovascular Research Institute, Wuhan University; Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Siqi Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Department of Geriatrics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China; Department of Cardiology, Renmin Hospital of Wuhan University; Cardiovascular Research Institute, Wuhan University; Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Wen Ding
- Department of Cardiology, Renmin Hospital of Wuhan University; Cardiovascular Research Institute, Wuhan University; Hubei Key Laboratory of Cardiology, Wuhan, China; Department of Radiology, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jun Wan
- Department of Cardiology, Renmin Hospital of Wuhan University, Department of Geriatrics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China; Department of Cardiology, Renmin Hospital of Wuhan University; Cardiovascular Research Institute, Wuhan University; Hubei Key Laboratory of Cardiology, Wuhan, China.
| | - Juan-Juan Qin
- Department of Cardiology, Renmin Hospital of Wuhan University, Department of Geriatrics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China; Center for Healthy Aging, Wuhan University School of Nursing, Wuhan, China.
| | - Menglong Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Department of Geriatrics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China; Department of Cardiology, Renmin Hospital of Wuhan University; Cardiovascular Research Institute, Wuhan University; Hubei Key Laboratory of Cardiology, Wuhan, China.
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2
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Harrison DG, Patrick DM. Immune Mechanisms in Hypertension. Hypertension 2024; 81:1659-1674. [PMID: 38881474 PMCID: PMC11254551 DOI: 10.1161/hypertensionaha.124.21355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
It is now apparent that immune mediators including complement, cytokines, and cells of the innate and adaptive immune system contribute not only to blood pressure elevation but also to the target organ damage that occurs in response to stimuli like high salt, aldosterone, angiotensin II, and sympathetic outflow. Alterations of vascular hemodynamic factors, including microvascular pulsatility and shear forces, lead to vascular release of mediators that affect myeloid cells to become potent antigen-presenting cells and promote T-cell activation. Research in the past 2 decades has defined specific biochemical and molecular pathways that are engaged by these stimuli and an emerging paradigm is these not only lead to immune activation, but that products of immune cells, including cytokines, reactive oxygen species, and metalloproteinases act on target cells to further raise blood pressure in a feed-forward fashion. In this review, we will discuss these molecular and pathophysiological events and discuss clinical interventions that might prove effective in quelling this inflammatory process in hypertension and related cardiovascular diseases.
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Affiliation(s)
- David G. Harrison
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232
| | - David M. Patrick
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232
- Department of Veterans Affairs, Nashville, TN 37212
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3
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Thangaraj SS, Oxlund CS, Andersen H, Svenningsen P, Stubbe J, Palarasah Y, Fonseca MPD, Ketelhuth DFJ, Enggaard C, Hansen MH, Henriksen JE, Jacobsen IA, Jensen BL. Amiloride lowers plasma TNF and interleukin-6 but not interleukin-17A in patients with hypertension and type 2 diabetes. Am J Physiol Renal Physiol 2024; 327:F37-F48. [PMID: 38779752 DOI: 10.1152/ajprenal.00268.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 04/12/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024] Open
Abstract
Interleukin (IL)-17A contributes to hypertension in preclinical models. T helper 17 and dendritic cells are activated by NaCl, which could involve the epithelial Na+ channel (ENaC). We hypothesized that the ENaC blocker amiloride reduces plasma IL-17A and related cytokines in patients with hypertension. Concentrations of IL-17A, IFN-γ, TNF, IL-6, IL-1β, and IL-10 were determined by immunoassays in plasma from two patient cohorts before and after amiloride treatment: 1) patients with type 2 diabetes mellitus (T2DM) and treatment-resistant hypertension (n = 69, amiloride 5-10 mg/day for 8 wk) and 2) patients with hypertension and type 1 diabetes mellitus (T1DM) (n = 29) on standardized salt intake (amiloride 20-40 mg/day, 2 days). Plasma and tissue from ANG II-hypertensive mice with T1DM treated with amiloride (2 mg/kg/day, 4 days) were analyzed. The effect of amiloride and benzamil on macrophage cytokines was determined in vitro. Plasma cytokines showed higher concentrations (IL-17A ∼40-fold) in patients with T2DM compared with T1DM. In patients with T2DM, amiloride had no effect on IL-17A but lowered TNF and IL-6. In patients with T1DM, amiloride had no effect on IL-17A but increased TNF. In both cohorts, blood pressure decline and plasma K+ increase did not relate to plasma cytokine changes. In mice, amiloride exerted no effect on IL-17A in the plasma, kidney, aorta, or left cardiac ventricle but increased TNF in cardiac and kidney tissues. In lipopolysaccharide-stimulated human THP-1 macrophages, amiloride and benzamil (from 1 nmol/L) decreased TNF, IL-6, IL-10, and IL-1β. In conclusion, inhibition of ENaC by amiloride reduces proinflammatory cytokines TNF and IL-6 but not IL-17A in patients with T2DM, potentially by a direct action on macrophages.NEW & NOTEWORTHY ENaC activity may contribute to macrophage-derived cytokine release, since amiloride exerts anti-inflammatory effects by suppression of TNF and IL-6 cytokines in patients with resistant hypertension and type 2 diabetes and in THP-1-derived macrophages in vitro.
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Affiliation(s)
- Sai Sindhu Thangaraj
- Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Christina S Oxlund
- Department of Cardiology, Hospital of Southwest Jutland, Esbjerg, Denmark
| | - Henrik Andersen
- Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Per Svenningsen
- Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Jane Stubbe
- Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Yaseelan Palarasah
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Micaella Pereira Da Fonseca
- Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Daniel F J Ketelhuth
- Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Camilla Enggaard
- Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Maria Høj Hansen
- Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | | | - Ib Abildgaard Jacobsen
- Research Unit for Cardiovascular and Metabolic Prevention, Department of Endocrinology, Odense University Hospital, Odense, Denmark
| | - Boye L Jensen
- Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
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Arkhipov SN, Liao TD, Potter DL, Bobbitt KR, Ivanov V, Ortiz PA, Pavlov TS. Dissociation of Hypertension and Renal Damage After Cessation of High-Salt Diet in Dahl Rats. Hypertension 2024; 81:1345-1355. [PMID: 38618734 PMCID: PMC11096017 DOI: 10.1161/hypertensionaha.123.21887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 03/29/2024] [Indexed: 04/16/2024]
Abstract
BACKGROUND Every year, thousands of patients with hypertension reduce salt consumption in an effort to control their blood pressure. However, hypertension has a self-sustaining character in a significant part of the population. We hypothesized that chronic hypertension leads to irreversible renal damage that remains after removing the trigger, causing an elevation of the initial blood pressure. METHODS Dahl salt-sensitive rat model was used for chronic, continuous observation of blood pressure. Rats were fed a high salt diet to induce hypertension, and then the diet was switched back to normal sodium content. RESULTS We found that developed hypertension was irreversible by salt cessation: after a short period of reduction, blood pressure grew even higher than in the high-salt phase. Notably, the self-sustaining phase of hypertension was sensitive to benzamil treatment due to sustaining epithelial sodium channel hyperactivity, as shown with patch-clamp analysis. Glomerular damage and proteinuria were also irreversible. In contrast, some mechanisms, contributing to the development of salt-sensitive hypertension, normalized after salt restriction. Thus, flow cytometry demonstrated that dietary salt reduction in hypertensive animals decreased the number of total CD45+, CD3+CD4+, and CD3+CD8+ cells in renal tissues. Also, we found tubular recovery and improvement of glomerular filtration rate in the postsalt period versus a high-salt diet. CONCLUSIONS Based on earlier publications and current data, poor response to salt restriction is due to the differential contribution of the factors recognized in the developmental phase of hypertension. We suggest that proteinuria or electrolyte transport can be prioritized over therapeutic targets of inflammatory response.
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Affiliation(s)
- Sergey N. Arkhipov
- Division of Hypertension and Vascular Research, Henry Ford Health
- Department of Physiology, Wayne State University
| | - Tang-Dong Liao
- Division of Hypertension and Vascular Research, Henry Ford Health
| | - D'Anna L. Potter
- Division of Hypertension and Vascular Research, Henry Ford Health
| | | | - Veniamin Ivanov
- Division of Hypertension and Vascular Research, Henry Ford Health
| | - Pablo A. Ortiz
- Division of Hypertension and Vascular Research, Henry Ford Health
- Department of Physiology, Wayne State University
| | - Tengis S. Pavlov
- Division of Hypertension and Vascular Research, Henry Ford Health
- Department of Physiology, Wayne State University
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5
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Guzik TJ, Nosalski R, Maffia P, Drummond GR. Immune and inflammatory mechanisms in hypertension. Nat Rev Cardiol 2024; 21:396-416. [PMID: 38172242 DOI: 10.1038/s41569-023-00964-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/20/2023] [Indexed: 01/05/2024]
Abstract
Hypertension is a global health problem, with >1.3 billion individuals with high blood pressure worldwide. In this Review, we present an inflammatory paradigm for hypertension, emphasizing the crucial roles of immune cells, cytokines and chemokines in disease initiation and progression. T cells, monocytes, macrophages, dendritic cells, B cells and natural killer cells are all implicated in hypertension. Neoantigens, the NLRP3 inflammasome and increased sympathetic outflow, as well as cytokines (including IL-6, IL-7, IL-15, IL-18 and IL-21) and a high-salt environment, can contribute to immune activation in hypertension. The activated immune cells migrate to target organs such as arteries (especially the perivascular fat and adventitia), kidneys, the heart and the brain, where they release effector cytokines that elevate blood pressure and cause vascular remodelling, renal damage, cardiac hypertrophy, cognitive impairment and dementia. IL-17 secreted by CD4+ T helper 17 cells and γδ T cells, and interferon-γ and tumour necrosis factor secreted by immunosenescent CD8+ T cells, exert crucial effector roles in hypertension, whereas IL-10 and regulatory T cells are protective. Effector mediators impair nitric oxide bioavailability, leading to endothelial dysfunction and increased vascular contractility. Inflammatory effector mediators also alter renal sodium and water balance and promote renal fibrosis. These mechanisms link hypertension with obesity, autoimmunity, periodontitis and COVID-19. A comprehensive understanding of the immune and inflammatory mechanisms of hypertension is crucial for safely and effectively translating the findings to clinical practice.
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Affiliation(s)
- Tomasz J Guzik
- Centre for Cardiovascular Sciences, University of Edinburgh, Edinburgh, UK.
- Department of Medicine and Omicron Medical Genomics Laboratory, Jagiellonian University, Collegium Medicum, Kraków, Poland.
- Africa-Europe Cluster of Research Excellence (CoRE) in Non-Communicable Diseases & Multimorbidity, African Research Universities Alliance ARUA & The Guild, Glasgow, UK.
| | - Ryszard Nosalski
- Centre for Cardiovascular Sciences, University of Edinburgh, Edinburgh, UK
| | - Pasquale Maffia
- Africa-Europe Cluster of Research Excellence (CoRE) in Non-Communicable Diseases & Multimorbidity, African Research Universities Alliance ARUA & The Guild, Glasgow, UK
- School of Infection & Immunity, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Grant R Drummond
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Melbourne, Victoria, Australia
- Centre for Cardiovascular Biology and Disease Research, La Trobe University, Melbourne, Victoria, Australia
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6
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Yang ZJ, Liu Y, Liu YL, Qi B, Yuan X, Shi WX, Miao L. Osteoarthritis and hypertension: observational and Mendelian randomization analyses. Arthritis Res Ther 2024; 26:88. [PMID: 38632649 PMCID: PMC11022320 DOI: 10.1186/s13075-024-03321-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 04/05/2024] [Indexed: 04/19/2024] Open
Abstract
BACKGROUND The association between osteoarthritis (OA) and hypertension is a subject of ongoing debate in observational research, and the underlying causal relationship between them remains elusive. METHODS This study retrospectively included 24,871 participants in the National Health and Nutrition Examination Survey (NHANES) from 2013 to 2020. Weighted logistic regression was performed to investigate the connection between OA and hypertension. Additionally, Mendelian randomization (MR) analysis was conducted to explore the potential causal relationship between OA and hypertension. RESULTS In the NHANES data, after adjusting for multiple confounding factors, there was no significant relationship between OA and hypertension (OR 1.30, 95% CI, 0.97-1.73, P = 0.089). However, among males, OA appeared to be associated with a higher risk of hypertension (OR 2.25, 95% CI, 1.17-4.32, P = 0.019). Furthermore, MR results indicate no relationship between multiple OA phenotypes and hypertension: knee OA (IVW, OR 1.024, 95% CI: 0.931-1.126, P = 0.626), hip OA (IVW, OR 0.990, 95% CI: 0.941-1.042, P = 0.704), knee or hip OA (IVW, OR 1.005, 95% CI: 0.915-1.105, P = 0.911), and OA from UK Biobank (IVW, OR 0.796, 95% CI: 0.233-2.714, P = 0.715). Importantly, these findings remained consistent across different genders and in reverse MR. CONCLUSIONS Our study found that OA patients had a higher risk of hypertension only among males in the observational study. However, MR analysis did not uncover any causal relationship between OA and hypertension.
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Affiliation(s)
- Zhi-Jie Yang
- Departments of Cardiology, Liuzhou People's Hospital, 8 Wenchang Road, Liuzhou, Guangxi, 545006, People's Republic of China
| | - Yuan Liu
- Departments of Cardiology, Liuzhou People's Hospital, 8 Wenchang Road, Liuzhou, Guangxi, 545006, People's Republic of China
| | - Yan-Li Liu
- Departments of Cardiology, Liuzhou People's Hospital, 8 Wenchang Road, Liuzhou, Guangxi, 545006, People's Republic of China
| | - Bin Qi
- Departments of Cardiology, Liuzhou People's Hospital, 8 Wenchang Road, Liuzhou, Guangxi, 545006, People's Republic of China
| | - Xin Yuan
- Departments of Cardiology, Liuzhou People's Hospital, 8 Wenchang Road, Liuzhou, Guangxi, 545006, People's Republic of China
| | - Wan-Xin Shi
- Departments of Cardiology, Liuzhou People's Hospital, 8 Wenchang Road, Liuzhou, Guangxi, 545006, People's Republic of China
| | - Liu Miao
- Departments of Cardiology, Liuzhou People's Hospital, 8 Wenchang Road, Liuzhou, Guangxi, 545006, People's Republic of China.
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7
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Matsuoka T, Abe M, Kobayashi H. Iron Metabolism and Inflammatory Mediators in Patients with Renal Dysfunction. Int J Mol Sci 2024; 25:3745. [PMID: 38612557 PMCID: PMC11012052 DOI: 10.3390/ijms25073745] [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: 01/31/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Chronic kidney disease (CKD) affects around 850 million people worldwide, posing significant challenges in healthcare due to complications like renal anemia, end-stage kidney disease, and cardiovascular diseases. This review focuses on the intricate interplay between iron metabolism, inflammation, and renal dysfunction in CKD. Renal anemia, prevalent in CKD, arises primarily from diminished erythropoietin (EPO) production and iron dysregulation, which worsens with disease progression. Functional and absolute iron deficiencies due to impaired absorption and chronic inflammation are key factors exacerbating erythropoiesis. A notable aspect of CKD is the accumulation of uremic toxins, such as indoxyl sulfate (IS), which hinder iron metabolism and worsen anemia. These toxins directly affect renal EPO synthesis and contribute to renal hypoxia, thus playing a critical role in the pathophysiology of renal anemia. Inflammatory cytokines, especially TNF-α and IL-6, further exacerbate CKD progression and disrupt iron homeostasis, thereby influencing anemia severity. Treatment approaches have evolved to address both iron and EPO deficiencies, with emerging therapies targeting hepcidin and employing hypoxia-inducible factor (HIF) stabilizers showing potential. This review underscores the importance of integrated treatment strategies in CKD, focusing on the complex relationship between iron metabolism, inflammation, and renal dysfunction to improve patient outcomes.
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Affiliation(s)
| | | | - Hiroki Kobayashi
- Division of Nephrology, Hypertension and Endocrinology, Department of Medicine, Nihon University School of Medicine, Tokyo 173-8610, Japan
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Hao XM, Liu Y, Hailaiti D, Gong Y, Zhang XD, Yue BN, Liu JP, Wu XL, Yang KZ, Wang J, Liu QG. Mechanisms of inflammation modulation by different immune cells in hypertensive nephropathy. Front Immunol 2024; 15:1333170. [PMID: 38545112 PMCID: PMC10965702 DOI: 10.3389/fimmu.2024.1333170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 02/15/2024] [Indexed: 04/10/2024] Open
Abstract
Hypertensive nephropathy (HTN) is the second leading cause of end-stage renal disease (ESRD) and a chronic inflammatory disease. Persistent hypertension leads to lesions of intrarenal arterioles and arterioles, luminal stenosis, secondary ischemic renal parenchymal damage, and glomerulosclerosis, tubular atrophy, and interstitial fibrosis. Studying the pathogenesis of hypertensive nephropathy is a prerequisite for diagnosis and treatment. The main cause of HTN is poor long-term blood pressure control, but kidney damage is often accompanied by the occurrence of immune inflammation. Some studies have found that the activation of innate immunity, inflammation and acquired immunity is closely related to the pathogenesis of HTN, which can cause damage and dysfunction of target organs. There are more articles on the mechanism of diabetic nephropathy, while there are fewer studies related to immunity in hypertensive nephropathy. This article reviews the mechanisms by which several different immune cells and inflammatory cytokines regulate blood pressure and renal damage in HTN. It mainly focuses on immune cells, cytokines, and chemokines and inhibitors. However, further comprehensive and large-scale studies are needed to determine the role of these markers and provide effective protocols for clinical intervention and treatment.
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Affiliation(s)
- Xiao-Min Hao
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Yu Liu
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | | | - Yu Gong
- School of Acupuncture-Moxibustion and Tuina, Beijing University of Chinese Medicine, Beijing, China
| | - Xu-Dong Zhang
- Department of Chinese Medicine, Beijing Jishuitan Hospital, Beijing, China
| | - Bing-Nan Yue
- School of Acupuncture-Moxibustion and Tuina, Beijing University of Chinese Medicine, Beijing, China
| | - Ji-Peng Liu
- School of Acupuncture-Moxibustion and Tuina, Beijing University of Chinese Medicine, Beijing, China
| | - Xiao-Li Wu
- School of Acupuncture-Moxibustion and Tuina, Beijing University of Chinese Medicine, Beijing, China
| | - Ke-Zhen Yang
- Department of Rehabilitation Medicine, Sir Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jun Wang
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Qing-Guo Liu
- School of Acupuncture-Moxibustion and Tuina, Beijing University of Chinese Medicine, Beijing, China
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9
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Benson LN, Mu S. Interferon gamma in the pathogenesis of hypertension - recent insights. Curr Opin Nephrol Hypertens 2024; 33:154-160. [PMID: 38164939 PMCID: PMC10842676 DOI: 10.1097/mnh.0000000000000966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
PURPOSE OF REVIEW The mounting body of evidence underscores the pivotal role of interferon gamma (IFNγ) in the pathogenesis of hypertension, prompting exploration of the mechanisms by which this cytokine fosters a pro-inflammatory immune milieu, subsequently exacerbating hypertension. In this review, we delve into recent preclinical and clinical studies from the past two years to elucidate how IFNγ participates in the progression of hypertension. RECENT FINDINGS IFNγ promotes renal CD8 + T cell accumulation by upregulating tubular PDL1 and MHC-I, intensifying cell-to-cell interaction. Intriguingly, a nucleotide polymorphism in LNK, predisposing towards hypertension, correlates with augmented T cell IFNγ production. Additionally, anti-IFNγ treatment exhibits protective effects against T cell-mediated inflammation during angiotensin II infusion or transverse aortic constriction. Moreover, knockout of the mineralocorticoid receptor in T cells protects against cardiac dysfunction induced by myocardial infarction, correlating with reduced IFNγ and IL-6, decreased macrophage recruitment, and attenuated fibrosis. Interestingly, increased IFNγ production correlates with elevated blood pressure, impacting individuals with type 2 diabetes, nondiabetics, and obese hypertensive patients. SUMMARY These revelations spotlight IFNγ as the critical mediator bridging the initial phase of blood pressure elevation with the sustained and exacerbated pathology. Consequently, blocking IFNγ signaling emerges as a promising therapeutic target to improve the management of this 'silent killer.'
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Affiliation(s)
- Lance N. Benson
- Heersink School of Medicine: Department of CardioRenal Physiology and Medicine, Division of Nephrology University of Alabama at Birmingham, Birmingham, Alabama
| | - Shengyu Mu
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
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10
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Gan L, Ye D, Feng Y, Pan H, Lu X, Wan J, Ye J. Immune cells and hypertension. Immunol Res 2024; 72:1-13. [PMID: 38044398 DOI: 10.1007/s12026-023-09414-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 08/10/2023] [Indexed: 12/05/2023]
Abstract
Hypertension is one of the leading causes of death due to target organ injury from cardiovascular disease. Although there are many treatments, only one-sixth of hypertensive patients effectively control their blood pressure. Therefore, further understanding the pathogenesis of hypertension is essential for the treatment of hypertension. Much research shows that immune cells play an important role in the pathogenesis of hypertension. Here, we discuss the roles of different immune cells in hypertension. Many immune cells participate in innate and adaptive immune responses, such as monocytes/macrophages, neutrophils, dendritic cells, NK cells, and B and T lymphocytes. Immune cells infiltrate the blood vessels, kidneys, and hearts and cause damage. The mechanism is that immune cells secrete cytokines such as interleukin, interferon, and tumor necrosis factor, which affect the inflammatory reaction, oxidative stress, and kidney sodium water retention, and finally aggravate or reduce the dysfunction, remodeling, and fibrosis of the blood vessel, kidney, and heart to participate in blood pressure regulation. This article reviews the research progress on immune cells and hypertension.
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Affiliation(s)
- Liren Gan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Di Ye
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Yongqi Feng
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Heng Pan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Xiyi Lu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Jun Wan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China.
- Hubei Key Laboratory of Cardiology, Wuhan, China.
| | - Jing Ye
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China.
- Hubei Key Laboratory of Cardiology, Wuhan, China.
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11
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Nagarajan M, Maadurshni GB, Manivannan J. Exposure to low dose of Bisphenol A (BPA) intensifies kidney oxidative stress, inflammatory factors expression and modulates Angiotensin II signaling under hypertensive milieu. J Biochem Mol Toxicol 2024; 38:e23533. [PMID: 37718616 DOI: 10.1002/jbt.23533] [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: 03/24/2023] [Revised: 07/18/2023] [Accepted: 09/01/2023] [Indexed: 09/19/2023]
Abstract
Humans are constantly exposed to low concentrations of ubiquitous environmental pollutant, Bisphenol A (BPA). Due to the prevalence of hypertension (one of the major risk factors of cardiovascular disease [CVD]) in the population, it is necessary to explore the adverse effect of BPA under hypertension associated pathogenic milieu. The current study exposed the Nω-nitro-l-arginine methyl ester (L-NAME) induced hypertensive Wistar rats to low dose BPA (50 μg/kg) for 30 days period. In tissue samples immunohistochemistry, real-time quantitative polymerase chain reaction and enzymatic assays were conducted. Moreover, studies on primary kidney cell culture were employed to explore the impact of low dose of BPA exposure at nanomolar level (20-80 nM range) on renal cells through various fluorescence assays. The observed results illustrate that BPA exposure potentiates/aggravates hypertension induced tissue abnormalities (renal fibrosis), oxidative stress (ROS generation), elevated angiotensin-converting enzyme activity, malfunction of the antioxidant and tricarboxylic acid cycle enzymes, tissue lipid abnormalities and inflammatory factor expression (both messenger RNA and protein level of TNF-α and IL-6). Further, in vitro exposure of nM levels of BPA to primary kidney cells modulates oxidative stress (both superoxide and total ROS), mitochondrial physiology (reduced mitochondrial transmembrane potential-∆ψm) and lipid peroxidation in a dose dependent manner. In addition, angiotensin II induced ROS generation was aggravated further by BPA during coexposure in kidney cells. Therefore, during risk assessment, a precise investigation on BPA exposure in hypertensive (CVD vulnerable) populations is highly suggested.
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Affiliation(s)
- Manigandan Nagarajan
- Environmental Health and Toxicology Laboratory, Department of Environmental Sciences, School of Life Sciences, Bharathiar University, Coimbatore, Tamil Nadu, India
| | | | - Jeganathan Manivannan
- Environmental Health and Toxicology Laboratory, Department of Environmental Sciences, School of Life Sciences, Bharathiar University, Coimbatore, Tamil Nadu, India
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12
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Bello II, Omigbodun A, Morhason-Bello I. Common salt aggravated pathology of testosterone-induced benign prostatic hyperplasia in adult male Wistar rat. BMC Urol 2023; 23:207. [PMID: 38082261 PMCID: PMC10712029 DOI: 10.1186/s12894-023-01371-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 11/20/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Benign prostatic hyperplasia (BPH) is a major health concern associated with lower urinary tract symptoms and sexual dysfunction in men. Recurrent inflammation, decreased apoptotic rate and oxidative stress are some of the theories that explain the pathophysiology of BPH. Common salt, a food additive, is known to cause systemic inflammation and redox imbalance, and may serve as a potential risk factor for BPH development or progression. This study examined the effect of common salt intake on the pathology of testosterone-induced BPH. METHODS Forty male Wistar rats were randomly divided into four equal groups of 10: a control and three salt diet groups-low-salt diet (LSD), standard-salt diet (SSD) and high-salt diet (HSD). The rats were castrated, allowed to recuperate and placed on salt-free diet (control), 0.25% salt diet (LSD), 0.5% salt diet (SSD) and 1.25% salt diet (HSD) for 60 days ad libitum. On day 33, BPH was induced in all the rats with daily injections of testosterone propionate-Testost® (3 mg/kg body weight) for 28 days. The rats had overnight fast (12 h) on day 60 and were euthanized the following day in order to collect blood and prostate samples for biochemical, molecular and immunohistochemistry (IHC) analyses. Mean ± SD values were calculated for each group and compared for significant difference with ANOVA followed by post hoc test (Tukey HSD) at p < 0.05. RESULTS This study recorded a substantially higher level of IL-6, IL-8 and COX-2 in salt diet groups and moderate IHC staining of COX-2 in HSD group. The prostatic level of IL-17, IL-1β, PGE2, relative prostate weight and serum PSA levels were not statistically different. The concentrations of IGF-1, TGF-β were similar in all the groups but there were multiple fold increase in Bcl-2 expression in salt diet groups-LSD (13.2), SSD (9.5) and HSD (7.9) and multiple fold decrease in VEGF expression in LSD (-6.3), SSD (-5.1) and HSD (-14.1) compared to control. Activity of superoxide dismutase (SOD) and concentration of nitric oxide rose in LSD and SSD groups, and SSD and HSD groups respectively. Activities of glutathione peroxidase and catalase, and concentration of NADPH and hydrogen peroxide were not significantly different. IHC showed positive immunostaining for iNOS expression in all the groups while histopathology revealed moderate to severe prostatic hyperplasia in salt diet groups. CONCLUSIONS These findings suggest that low, standard and high salt diets aggravated the pathology of testosterone-induced BPH in Wistar rats by promoting inflammation, oxidative stress, while suppressing apoptosis and angiogenesis.
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Affiliation(s)
- Idris Idowu Bello
- Department of Reproductive Health Sciences, Pan African University Life and Earth Sciences Institute (including Health and Agriculture), PAULESI, University of Ibadan, Ibadan, Nigeria.
- Department of Animal Health Technology, Oyo State College of Agriculture and Technology, Igboora, Oyo State, Nigeria.
| | - Akinyinka Omigbodun
- Department of Obstetrics and Gynaecology, Faculty of Clinical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Imran Morhason-Bello
- Department of Obstetrics and Gynaecology, Faculty of Clinical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
- Institute for Advanced Medical Research and Training, College of Medicine, University of Ibadan, Ibadan, Nigeria
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13
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Copur S, Peltek IB, Mutlu A, Tanriover C, Kanbay M. A new immune disease: systemic hypertension. Clin Kidney J 2023; 16:1403-1419. [PMID: 37664577 PMCID: PMC10469084 DOI: 10.1093/ckj/sfad059] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Indexed: 09/05/2023] Open
Abstract
Systemic hypertension is the most common medical comorbidity affecting the adult population globally, with multiple associated outcomes including cerebrovascular diseases, cardiovascular diseases, vascular calcification, chronic kidney disease, metabolic syndrome and mortality. Despite advancements in the therapeutic field approximately one in every five adult patients with hypertension is classified as having treatment-resistant hypertension, indicating the need for studies to provide better understanding of the underlying pathophysiology and the need for more therapeutic targets. Recent pre-clinical studies have demonstrated the role of the innate and adaptive immune system including various cell types and cytokines in the pathophysiology of hypertension. Moreover, pre-clinical studies have indicated the potential beneficial effects of immunosuppressant medications in the control of hypertension. Nevertheless, it is unclear whether such pathophysiological mechanisms and therapeutic alternatives are applicable to human subjects, while this area of research is undoubtedly a rapidly growing field.
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Affiliation(s)
- Sidar Copur
- Department of Medicine, Koc University School of Medicine, Istanbul, Turkey
| | - Ibrahim B Peltek
- Department of Medicine, Koc University School of Medicine, Istanbul, Turkey
| | - Ali Mutlu
- Department of Medicine, Koc University School of Medicine, Istanbul, Turkey
| | - Cem Tanriover
- Department of Medicine, Koc University School of Medicine, Istanbul, Turkey
| | - Mehmet Kanbay
- Department of Medicine, Section of Nephrology, Koc University School of Medicine, Istanbul, Turkey
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14
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Wu O, Yuan C, Leng J, Zhang X, Liu W, Yang F, Zhang H, Li J, Khederzadeh S, Jiang Z, Fang H, Liu X, Lu X, Xia J. Colorable role of interleukin (IL)-6 in obesity hypertension: A hint from a Chinese adult case-control study. Cytokine 2023; 168:156226. [PMID: 37235887 DOI: 10.1016/j.cyto.2023.156226] [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: 01/14/2023] [Revised: 04/10/2023] [Accepted: 05/04/2023] [Indexed: 05/28/2023]
Abstract
BACKGROUND Obesity and hypertension are major risk factors for cardiovascular diseases that affect millions of people worldwide. Both conditions are associated with chronic low-grade inflammation, which is mediated by cytokines such as interleukin-6 (IL-6). IL-6 is a multifunctional cytokine that can have pro-inflammatory or anti-inflammatory effects depending on the context. The exact role of IL-6 in obesity-associated hypertension is unclear. OBJECTIVE To investigate how IL-6 affects blood pressure, inflammation, and metabolic function in obesity-hypertension using a Chinese adult case-control study. METHODS A total of 153 participants were sorted into four subgroups according to their body mass index (BMI) and blood pressure (BP): normal healthy group (NH), just obesity group (JO), just-hypertension group (JH), and obesity-hypertension group (OH). Serum IL-6 concentrations were measured by Enzyme-linked Immunosorbent Assay (ELISA) and their correlations with anthropometric and laboratory parameters and their differences across the subgroups were examined. Multiple linear regression analysis was performed to identify the predictors of serum IL-6 concentrations in each group. RESULTS Serum IL-6 concentrations were higher in NH group than in JO group and correlated positively with diastolic blood pressure in NH and JO groups, but not in JH and OH groups. Serum IL-6 concentrations also correlated with albumin in NH group, alkaline phosphatase in JO group, serum creatinine and fasting blood glucose in JH group. The influencing factors of serum IL-6 concentrations varied among the four groups, with gender, diastolic blood pressure and albumin being significant predictors in NH group, alkaline phosphatase in JO group, age and serum creatinine in JH group, and none in OH group. CONCLUSIONS These results suggest that IL-6 may play diverse effects in the pathogenesis of obesity- hypertension, depending on the presence or absence of obesity and hypertension. Further studies are needed to elucidate the underlying mechanisms of IL-6 signaling and function in these diseases.
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Affiliation(s)
- Ou Wu
- Shulan International Medical College, Zhejiang Shuren University, Zhejiang, China.
| | - Chengda Yuan
- Department of Dermatology, Hangzhou Hospital of Traditional Chinese Medicine, Hangzhou 310007, China
| | - Jianhang Leng
- Department of Central Laboratory/Medical examination center of Hangzhou, The Frist People's Hospital of Hangzhou, 310003, Zhejiang, China
| | - Xingyu Zhang
- Thomas E. Starzl Transplantation Institute, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Wei Liu
- JFIntelligent Healthcare Technology Co. Ltd, Building No.5-7, No.699 Tianxiang Avenue, Hi-Tech Zone, Nanchang, Jiangxi Province, China
| | - Fenfang Yang
- Department of Central Laboratory/Medical examination center of Hangzhou, The Frist People's Hospital of Hangzhou, 310003, Zhejiang, China
| | - Hu Zhang
- Department of Thoracic Surgery, Sir Run Run Shaw Hospital Affiliated with Medical College of Zhejiang University, Zhejiang, China
| | - Jiajia Li
- Department of Central Laboratory, the First Affiliated Hospital of Anhui Medical University, Anhui, China
| | - Saber Khederzadeh
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China; Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, China
| | - Zhizhi Jiang
- ZhaNongKou Street Community Health Service Center, Hangzhou, Zhejiang, China
| | - Hangyan Fang
- Hangzhou Linping District Center for Disease Prevention and Control, zhejiang, China
| | - Xiaodong Liu
- Hangzhou center for disease control and prevention, Zhejiang, China
| | - Xi Lu
- Hangzhou Vocational and Technical College, Zhejiang, China.
| | - Jiangwei Xia
- Department of Neurology, Xuanwu Hospital, National Center for Neurological Disorders, Capital Medical University, Beijing, China; Beijing Municipal Geriatric Medical Research Center, Beijing, China.
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15
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Afsar B, Afsar RE. Hypoxia-inducible factors and essential hypertension: narrative review of experimental and clinical data. Pharmacol Rep 2023:10.1007/s43440-023-00497-x. [PMID: 37210694 DOI: 10.1007/s43440-023-00497-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 05/22/2023]
Abstract
Hypoxia-inducible factor (HIFs) is a new class of drug developed for the management of anemia in chronic kidney disease (CKD) patients. HIFs increase the production of erythropoietin in the kidney and liver, enhance the absorption and utilization of iron, and stimulate the maturation and proliferation of erythroid progenitor cells. Besides, HIFs regulate many physiologic processes by orchestrating the transcription of hundreds of genes. Essential hypertension (HT) is an epidemic worldwide. HIFs play a role in many biological processes involved in the regulation of blood pressure (BP). In the current review, we summarize pre-clinical and clinical studies investigating the relationship between HIFs and BP regulation in patients with CKD, conflicting issues, and discuss future potential strategies.
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Affiliation(s)
- Baris Afsar
- Department of Nephrology, School of Medicine, Suleyman Demirel University, Isparta, Turkey.
| | - Rengin Elsurer Afsar
- Department of Nephrology, School of Medicine, Suleyman Demirel University, Isparta, Turkey
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16
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Alieva AM, Butenko AV, Teplova NV, Reznik EV, Valiev RK, Skripnichenko EА, Sozykin AV, Nikitin IG. The role of interleukin-6 in the development of cardiovascular diseases: A review. CONSILIUM MEDICUM 2023. [DOI: 10.26442/20751753.2022.12.201948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
Currently, the search and study of new biological markers that can provide early diagnosis of cardiovascular diseases, serve as a laboratory tool for assessing the effectiveness of treatment, or be used as prognostic markers and risk stratification criteria is ongoing. Our literature review indicates the potentially important diagnostic and prognostic value of assessing members of the interleukin-6 family. It is expected that further scientific and clinical studies will demonstrate the possibility of using members of the interleukin-6 family as an additional laboratory tool for the diagnosis, risk stratification and prediction of cardiovascular events in cardiac patients. It is necessary to evaluate in detail the possibilities of blockade of these interleukin-6 molecules in patients with cardiovascular diseases in vitro and in vivo.
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17
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Chivers JM, Whiles SA, Miles CB, Biederman BE, Ellison MF, Lovingood CW, Wright MH, Hoover DB, Raafey MA, Youngberg GA, Venkatachalam MA, Zheleznova NN, Yang C, Liu P, Kriegel AJ, Cowley AW, O'Connor PM, Picken MM, Polichnowski AJ. Brown-Norway chromosome 1 mitigates the upregulation of proinflammatory pathways in mTAL cells and subsequent age-related CKD in Dahl SS/JrHsdMcwi rats. Am J Physiol Renal Physiol 2023; 324:F193-F210. [PMID: 36475869 PMCID: PMC9886360 DOI: 10.1152/ajprenal.00145.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 11/23/2022] [Accepted: 11/25/2022] [Indexed: 12/13/2022] Open
Abstract
Chronic kidney disease (CKD) has a strong genetic component; however, the underlying pathways are not well understood. Dahl salt-sensitive (SS)/Jr rats spontaneously develop CKD with age and are used to investigate the genetic determinants of CKD. However, there are currently several genetically diverse Dahl SS rats maintained at various institutions and the extent to which some exhibit age-related CKD is unclear. We assessed glomerulosclerosis (GS) and tubulointerstitial fibrosis (TIF) in 3- and 6-mo-old male and female SS/JrHsdMcwi, BN/NHsd/Mcwi [Brown-Norway (BN)], and consomic SS-Chr 1BN/Mcwi (SS.BN1) rats, in which chromosome 1 from the BN rat was introgressed into the genome of the SS/JrHsdMcwi rat. Rats were fed a 0.4% NaCl diet. GS (31 ± 3% vs. 7 ± 1%) and TIF (2.3 ± 0.2 vs. 0.5 ± 0.1) were significantly greater in 6-mo-old compared with 3-mo-old SS/JrHsdMcwi rats, and CKD was exacerbated in males. GS was minimal in 6- and 3-mo-old BN (3.9 ± 0.6% vs. 1.2 ± 0.4%) and SS.BN1 (2.4 ± 0.5% vs. 1.0 ± 0.3%) rats, and neither exhibited TIF. In SS/JrHsdMcwi and SS.BN1 rats, mean arterial blood pressure was significantly greater in 6-mo-old compared with 3-mo-old SS/JrHsdMcwi (162 ± 4 vs. 131 ± 2 mmHg) but not SS.BN1 (115 ± 2 vs. 116 ± 1 mmHg) rats. In 6-mo-old SS/JrHsdMcwi rats, blood pressure was significantly greater in females. RNA-sequencing analysis revealed that inflammatory pathways were upregulated in isolated medullary thick ascending tubules in 7-wk-old SS/JrHsdMcwi rats, before the development of tubule pathology, compared with SS.BN1 rats. In summary, SS/JrHsdMcwi rats exhibit robust age-related progression of medullary thick ascending limb abnormalities, CKD, and hypertension, and gene(s) on chromosome 1 have a major pathogenic role in such changes.NEW & NOTEWORTHY This study shows that the robust age-related progression of kidney disease in Dahl SS/JrHsdMcw rats maintained on a normal-salt diet is abolished in consomic SS.BN1 rats. Evidence that medullary thick ascending limb segments of SS/JrHsdMcw rats are structurally abnormal and enriched in proinflammatory pathways before the development of protein casts provides new insights into the pathogenesis of kidney disease in this model.
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Affiliation(s)
- Jacqueline M Chivers
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee
| | - Shannon A Whiles
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee
| | - Conor B Miles
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee
| | - Brianna E Biederman
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee
| | - Megan F Ellison
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee
| | - Connor W Lovingood
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee
| | - Marie H Wright
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee
| | - Donald B Hoover
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee
- Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson City, Tennessee
| | - Muhammad A Raafey
- Department of Pathology, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - George A Youngberg
- Department of Pathology, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | | | | | - Chun Yang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Pengyuan Liu
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Alison J Kriegel
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Allen W Cowley
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Paul M O'Connor
- Department of Physiology, Augusta University, Augusta, Georgia
| | - Maria M Picken
- Department of Pathology, Loyola University Medical Center, Maywood, Illinois
| | - Aaron J Polichnowski
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee
- Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson City, Tennessee
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18
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Hagagy N, Abdel-Mawgoud M, Akhtar N, Selim S, AbdElgawad H. The new isolated Archaea strain improved grain yield, metabolism and quality of wheat plants under Co stress conditions. JOURNAL OF PLANT PHYSIOLOGY 2023; 280:153876. [PMID: 36444822 DOI: 10.1016/j.jplph.2022.153876] [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: 05/21/2022] [Revised: 10/23/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
Heavy metal (e.g. cobalt) pollution causes a serious of environmental and agricultural problems. On the other hand, plant growth-promoting microorganisms enhance plant growth and mitigate heavy metal stress. Herein, we isolated and identified the unclassified species strain NARS9, belong to Haloferax,. Cobalt (Co, 200 mg/kg soil) stress mitigating impact of the identified on wheat grains yield, primary and secondary metabolism and grain quality was investigated. Co alone significantly induced Co accumulation in wheat grain (260%), and consequently reduced wheat yield (130%) and quality. Haloferax NARS9 alone significantly enhanced grain chemicals composition (i.e., total sugars (89%) and organic acids (e.g., oxalic and isobutyric acids), essential amino acids (e.g., threonine, lysine, and histidine) and unsaturated fatty acids (e.g. eicosenoic, erucic and tetracosenoic acids). Interestingly, Co stress induced wheat grain yield, reduction were significantly mitigated by Haloferax NARS9 treatment by 26% compared to Co stress alone. Under Co stress, Haloferax NARS9 significantly increased sugar metabolism including sucrose and starch levels and their metabolic enzymes (i.e. invertases, sucrose synthase, starch synthase). This in turn increased organic acid (e.g. oxalic (70%) and malic acids (60%)) and amino acids. levels and biosynthetic enzymes, e.g. glutamine synthetase and threonine synthase. Increased sugars levels by Haloferax NARS9 under Co treatment also provided a route for the biosynthesis of saturated fatty acids, particularly palmitic and stearic acids. Furthermore, Haloferax NARS9 treatment supported the wheat nutritive value through increasing minerals (Ca, Fe, Mn, Zn) and antioxidants i.e., polyphenol, flavonoids, ASC and GSH and total polyamines by 50%, 110%, 400%, 30%, and 90% respectively). These in parallel with the increase in the activity of (phenylalanine ammonia-lyase (110%) in phenolic metabolism). Overall, this study demonstrates the potentiality of Haloferax NARS9 in harnessing carbon and nitrogen metabolism differentially in wheat plants to cope with Co toxicity. Our results also suggested that the use of Haloferax NARS9 in agricultural fields can improve growth and nutritional value of wheat grains.
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Affiliation(s)
- Nashwa Hagagy
- Department of Biology, College of Science and Arts at Khulis, University of Jeddah, Jeddah, 21959, Saudi Arabia.
| | | | - Nosheen Akhtar
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, 46000, Pakistan
| | - Samy Selim
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka, 72341, Saudi Arabia
| | - Hamada AbdElgawad
- Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt
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19
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Wynne BM, Samson TK, Moyer HC, van Elst HJ, Moseley AS, Hecht G, Paul O, Al-Khalili O, Gomez-Sanchez C, Ko B, Eaton DC, Hoover RS. Interleukin 6 mediated activation of the mineralocorticoid receptor in the aldosterone-sensitive distal nephron. Am J Physiol Cell Physiol 2022; 323:C1512-C1523. [PMID: 35912993 PMCID: PMC9662807 DOI: 10.1152/ajpcell.00272.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 06/28/2022] [Accepted: 07/11/2022] [Indexed: 11/22/2022]
Abstract
Hypertension is characterized by increased sodium (Na+) reabsorption along the aldosterone-sensitive distal nephron (ASDN) as well as chronic systemic inflammation. Interleukin-6 (IL-6) is thought to be a mediator of this inflammatory process. Interestingly, increased Na+ reabsorption within the ASDN does not always correlate with increases in aldosterone (Aldo), the primary hormone that modulates Na+ reabsorption via the mineralocorticoid receptor (MR). Thus, understanding how increased ASDN Na+ reabsorption may occur independent of Aldo stimulation is critical. Here, we show that IL-6 can activate the MR by activating Rac1 and stimulating the generation of reactive oxygen species (ROS) with a consequent increase in thiazide-sensitive Na+ uptake. Using an in vitro model of the distal convoluted tubule (DCT2), mDCT15 cells, we observed nuclear translocation of eGFP-tagged MR after IL-6 treatment. To confirm the activation of downstream transcription factors, mDCT15 cells were transfected with mineralocorticoid response element (MRE)-luciferase reporter constructs; then treated with vehicle, Aldo, or IL-6. Aldosterone or IL-6 treatment increased luciferase activity that was reversed with MR antagonist cotreatment, but IL-6 treatment was reversed by Rac1 inhibition or ROS reduction. In both mDCT15 and mpkCCD cells, IL-6 increased amiloride-sensitive transepithelial Na+ current. ROS and IL-6 increased 22Na+ uptake via the thiazide-sensitive sodium chloride cotransporter (NCC). These results are the first to demonstrate that IL-6 can activate the MR resulting in MRE activation and that IL-6 increases NCC-mediated Na+ reabsorption, providing evidence for an alternative mechanism for stimulating ASDN Na+ uptake during conditions where Aldo-mediated MR stimulation may not occur.
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Affiliation(s)
- Brandi M Wynne
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
- Department of Internal Medicine, Nephrology & Hypertension, University of Utah, Salt Lake City, Utah
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
- Immunology, Inflammation and Infectious Disease Initiative, University of Utah, Salt Lake City, Utah
| | - Trinity K Samson
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
| | - Hayley C Moyer
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
| | - Henrieke J van Elst
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
- Department of Physiology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Auriel S Moseley
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
| | - Gillian Hecht
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
| | - Oishi Paul
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
| | - Otor Al-Khalili
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
| | - Celso Gomez-Sanchez
- G.V. (Sonny) Montgomery VA Medical Center, Jackson, Mississippi
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Mississippi
| | - Benjamin Ko
- Department of Medicine, Nephrology, University of Chicago, Chicago, Illinois
| | - Douglas C Eaton
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
| | - Robert S Hoover
- Department of Medicine, Nephrology, Emory University, Atlanta, Georgia
- Research Service, Atlanta Veterans Affairs Medical Center, Atlanta, Georgia
- Section of Nephrology and Hypertension, Deming Department of Medicine, Tulane University, New Orleans, Louisiana
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20
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Lansdell TA, Chambers LC, Dorrance AM. Endothelial Cells and the Cerebral Circulation. Compr Physiol 2022; 12:3449-3508. [PMID: 35766836 DOI: 10.1002/cphy.c210015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Endothelial cells form the innermost layer of all blood vessels and are the only vascular component that remains throughout all vascular segments. The cerebral vasculature has several unique properties not found in the peripheral circulation; this requires that the cerebral endothelium be considered as a unique entity. Cerebral endothelial cells perform several functions vital for brain health. The cerebral vasculature is responsible for protecting the brain from external threats carried in the blood. The endothelial cells are central to this requirement as they form the basis of the blood-brain barrier. The endothelium also regulates fibrinolysis, thrombosis, platelet activation, vascular permeability, metabolism, catabolism, inflammation, and white cell trafficking. Endothelial cells regulate the changes in vascular structure caused by angiogenesis and artery remodeling. Further, the endothelium contributes to vascular tone, allowing proper perfusion of the brain which has high energy demands and no energy stores. In this article, we discuss the basic anatomy and physiology of the cerebral endothelium. Where appropriate, we discuss the detrimental effects of high blood pressure on the cerebral endothelium and the contribution of cerebrovascular disease endothelial dysfunction and dementia. © 2022 American Physiological Society. Compr Physiol 12:3449-3508, 2022.
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Affiliation(s)
- Theresa A Lansdell
- Department of Pharmacology and Toxicology, College of Osteopathic Medicine, Michigan State University, East Lansing, MI, 48824, USA
| | - Laura C Chambers
- Department of Pharmacology and Toxicology, College of Osteopathic Medicine, Michigan State University, East Lansing, MI, 48824, USA
| | - Anne M Dorrance
- Department of Pharmacology and Toxicology, College of Osteopathic Medicine, Michigan State University, East Lansing, MI, 48824, USA
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21
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Su S, Chen R, Zhang S, Shu H, Luo J. Immune system changes in those with hypertension when infected with SARS-CoV-2. Cell Immunol 2022; 378:104562. [PMID: 35901625 PMCID: PMC9183242 DOI: 10.1016/j.cellimm.2022.104562] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 06/01/2022] [Accepted: 06/06/2022] [Indexed: 01/08/2023]
Abstract
The coronavirus disease 2019 (COVID-19) outbreak has become an evolving global health crisis. With an increasing incidence of primary hypertension, there is greater awareness of the relationship between primary hypertension and the immune system [including CD4+, CD8+ T cells, interleukin-17 (IL-17)/T regulatory cells (Treg) balance, macrophages, natural killer (NK) cells, neutrophils, B cells, and cytokines]. Hypertension is associated with an increased risk of various infections, post-infection complications, and increased mortality from severe infections. Despite ongoing reports on the epidemiological and clinical features of COVID-19, no articles have systematically addressed the role of primary hypertension in COVID-19 or how COVID-19 affects hypertension or specific treatment in these high-risk groups. Here, we synthesize recent advances in understanding the relationship between primary hypertension and COVID-19 and its underlying mechanisms and provide specific treatment guidelines for these high-risk groups.
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22
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Interleukin 17A infusion has no acute or long-term hypertensive action in conscious unrestrained male mice. Pflugers Arch 2022; 474:709-719. [DOI: 10.1007/s00424-022-02705-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 04/03/2022] [Accepted: 05/05/2022] [Indexed: 11/26/2022]
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23
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Hengel FE, Benitah JP, Wenzel UO. Mosaic theory revised: inflammation and salt play central roles in arterial hypertension. Cell Mol Immunol 2022; 19:561-576. [PMID: 35354938 PMCID: PMC9061754 DOI: 10.1038/s41423-022-00851-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 02/21/2022] [Indexed: 02/06/2023] Open
Abstract
The mosaic theory of hypertension was advocated by Irvine Page ~80 years ago and suggested that hypertension resulted from the close interactions of different causes. Increasing evidence indicates that hypertension and hypertensive end-organ damage are not only mediated by the proposed mechanisms that result in hemodynamic injury. Inflammation plays an important role in the pathophysiology and contributes to the deleterious consequences of arterial hypertension. Sodium intake is indispensable for normal body function but can be detrimental when it exceeds dietary requirements. Recent data show that sodium levels also modulate the function of monocytes/macrophages, dendritic cells, and different T-cell subsets. Some of these effects are mediated by changes in the microbiome and metabolome due to high-salt intake. The purpose of this review is to propose a revised and extended version of the mosaic theory by summarizing and integrating recent advances in salt, immunity, and hypertension research. Salt and inflammation are placed in the middle of the mosaic because both factors influence each of the remaining pieces.
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Lu X, Zhang J, Wen Y, Ren J, Griffiths R, Rudemiller NP, Ide S, Souma T, Crowley SD. Type 1 Angiotensin Receptors on CD11c-Expressing Cells Protect Against Hypertension by Regulating Dendritic Cell-Mediated T Cell Activation. Hypertension 2022; 79:1227-1236. [PMID: 35430875 DOI: 10.1161/hypertensionaha.121.18734] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Type 1 angiotensin (AT1) receptors are expressed on immune cells, and we previously found that bone marrow-derived AT1 receptors protect against Ang (angiotensin) II-induced hypertension. CD11c is expressed on myeloid cells derived from the bone marrow, including dendritic cells (DCs) that activate T lymphocytes. Here, we examined the role of AT1 receptors on CD11c+ cells in hypertension pathogenesis. METHODS Mice lacking the dominant murine AT1 receptor isoform, AT1a, on CD11c+ cells (dendritic cell [DC] AT1aR knockout [KO]) and wild-type (WT) littermates were subjected to Ang II-induced hypertension. Blood pressures were measured by radiotelemetry. RESULTS DC AT1aR KO mice had exaggerated hypertensive responses to chronic Ang II infusion with enhanced renal accumulation of effector memory T cells and CD40+ DCs. CCL5 (C-C motif chemokine ligand 5) recruits T cells into injured tissues, and CCR7 (C-C motif chemokine receptor 7) facilitates DC and T cell interactions in the kidney lymph node to allow T cell activation. DCs from the hypertensive DC AT1aR KO kidneys expressed higher levels of CCL5 and CCR7. mRNA expressions for CCR7 and tumor necrosis factor-α were increased in CD4+ T cells from the renal lymph nodes of DC AT1aR KO mice. During the second week of Ang II infusion when blood pressures between groups diverged, DC AT1aR KO mice excreted less sodium than WTs. Expressions for epithelial sodium channel subunits were increased in DC AT1aR KO kidneys. CONCLUSIONS Following activation of the renin angiotensin system, AT1aR stimulation on DCs suppresses renal DC maturation and T cell activation with consequent protection from sodium retention and blood pressure elevation.
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Affiliation(s)
- Xiaohan Lu
- Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., Y.W., J.R., R.G., N.P.R., S.I., T.S., S,D.C.)
| | - Jiandong Zhang
- Division of Cardiology, Department of Medicine, University of North Carolina at Chapel Hill (J.Z.)
| | - Yi Wen
- Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., Y.W., J.R., R.G., N.P.R., S.I., T.S., S,D.C.)
| | - Jiafa Ren
- Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., Y.W., J.R., R.G., N.P.R., S.I., T.S., S,D.C.)
| | - Robert Griffiths
- Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., Y.W., J.R., R.G., N.P.R., S.I., T.S., S,D.C.)
| | - Nathan P Rudemiller
- Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., Y.W., J.R., R.G., N.P.R., S.I., T.S., S,D.C.)
| | - Shintaro Ide
- Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., Y.W., J.R., R.G., N.P.R., S.I., T.S., S,D.C.)
| | - Tomokazu Souma
- Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., Y.W., J.R., R.G., N.P.R., S.I., T.S., S,D.C.)
| | - Steven D Crowley
- Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., Y.W., J.R., R.G., N.P.R., S.I., T.S., S,D.C.)
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Feng Y, Ye D, Wang Z, Pan H, Lu X, Wang M, Xu Y, Yu J, Zhang J, Zhao M, Xu S, Pan W, Yin Z, Ye J, Wan J. The Role of Interleukin-6 Family Members in Cardiovascular Diseases. Front Cardiovasc Med 2022; 9:818890. [PMID: 35402550 PMCID: PMC8983865 DOI: 10.3389/fcvm.2022.818890] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 02/11/2022] [Indexed: 12/12/2022] Open
Abstract
Cardiovascular disease is one of the main causes of human mortality. Cytokines play crucial roles in the development of cardiovascular disease. Interleukin (IL)-6 family members are a series of cytokines, including IL-6, IL-11, IL-30, IL-31, OSM, LIF, CNTF, CT-1, CT-2, and CLC, that regulate multiple biological effects. Experimental and clinical evidence shows that IL-6 family members are closely related to cardiovascular diseases such as atherosclerosis, hypertension, aortic dissection, cardiac fibrosis, and cardiomyopathy. This review mainly discusses the role of IL-6 family members in cardiovascular disease for the sake of identifying possible intervention targets for cardiovascular disease prevention and treatment.
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Affiliation(s)
- Yongqi Feng
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Di Ye
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Zhen Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Heng Pan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Xiyi Lu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Menglong Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Yao Xu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Junping Yu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Jishou Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Mengmeng Zhao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Shuwan Xu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Wei Pan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Zheng Yin
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Jing Ye
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
- Jing Ye
| | - Jun Wan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
- *Correspondence: Jun Wan
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26
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Role of Oxidative Stress in Vascular Low-Grade Inflammation Initiation Due to Acute Salt Loading in Young Healthy Individuals. Antioxidants (Basel) 2022; 11:antiox11030444. [PMID: 35326095 PMCID: PMC8944840 DOI: 10.3390/antiox11030444] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/20/2022] [Accepted: 02/21/2022] [Indexed: 02/01/2023] Open
Abstract
This study aimed to investigate the effect of 7-day high-salt (HS) and the specific role of oxidative stress on vascular low-grade inflammation initiation in young salt-resistant healthy individuals. 30 young healthy individuals adhered to a 7-day low-salt (LS) diet (3.5 g salt/day), followed by a 7-day high-salt (HS) diet (~14.7 g salt/day) protocol. Pro- and anti-inflammatory cytokines, frequencies of peripheral blood Th17 and Treg cells, Th17/Treg ratio, enzymes SGK1, and p38/MAP kinase, as well as biomarkers of endothelial activation and oxidative stress, were measured before and after the 7-day HS diet protocol. Short-term HS diet significantly increased serum level of pro-inflammatory cytokines INF-γ, TNF-α, IL-9, and IL-17A levels, but also of anti-inflammatory cytokines IL-10 and TGF-β1. Relative amount of total SGK1 significantly increased, following the 7-day HS diet. Increased oxidative stress level, following HS diet, was negatively associated with the frequency of Treg cells. The increase in relative amount of total SGK1 in peripheral mononuclear cells following 7-day HS diet suggests lymphocyte (re)activation, in response to HS intake, resulting in enhanced production of pro-inflammatory (IL-17, INF-γ), but also anti-inflammatory cytokines (IL-10 and TGF-β1). Increased oxidative stress, due to HS loading, alters immune regulatory mechanisms, presumably via effects on Treg cells.
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27
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Thangaraj SS, Oxlund CS, Fonseca MPD, Svenningsen P, Stubbe J, Palarasah Y, Ketelhuth DFJ, Jacobsen IA, Jensen BL. The mineralocorticoid receptor blocker spironolactone lowers plasma interferon-γ and interleukin-6 in patients with type 2 diabetes and treatment-resistant hypertension. J Hypertens 2022; 40:153-162. [PMID: 34843183 DOI: 10.1097/hjh.0000000000002990] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND The mineralocorticoid receptor antagonist spironolactone lowers blood pressure in patients with resistant hypertension despite antihypertensive treatment with angiotensin-converting inhibitors (ACEi) and angiotensin-II receptor blockers (ARB). In preclinical studies, spironolactone suppresses pro-hypertensive interleukin 17A (IL-17A). OBJECTIVES Plasma samples were analysed from a randomized, double-blind placebo-controlled trial with spironolactone given to patients with type 2 diabetes mellitus (T2DM) and resistant hypertension on three antihypertensive drugs. We tested the hypothesis that spironolactone-induced antihypertensive effects are associated with suppression of IL-17A and related cytokines. METHODS Interferon-γ (IFN-γ), IL-17A, tumor necrosis factor-α (TNF-α), IL-6, IL-1β and IL-10 were assessed in plasma with immunoassay in samples before and after 16 weeks of treatment with placebo or spironolactone (12.5-25-50 mg/day). RESULTS Spironolactone significantly reduced plasma IFN-γ and IL-6 while IL-17A, TNF-α, IL-1β and IL-10 were unchanged. IL-6 was more sensitive to higher doses of spironolactone. At baseline, serum aldosterone correlated positively with diastolic night blood pressure. Urine albumin/creatinine-ratios correlated positively with plasma IL-6 at baseline. There were no relations between aldosterone and cytokine concentrations at baseline; between cytokine concentration and blood pressure at baseline; and between cytokine concentration decrease and blood pressure decrease, except for IFN-γ, after treatment. The spironolactone-induced elevation in plasma potassium related inversely to blood pressure but not to changes in cytokines. In macrophages in vitro, spironolactone suppressed lipopolysaccharide (LPS)-induced TNF-α, IL-6, IL-1β and IL-10 levels. CONCLUSION The antihypertensive action of spironolactone in resistant hypertensive patients is associated with suppressed IFN-γ and IL-6 and not IL-17A. Spironolactone exerts anti-inflammatory actions in vivo on macrophages and T-cells.
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Affiliation(s)
- Sai Sindhu Thangaraj
- Department of Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, Odense
| | | | - Micaella Pereira Da Fonseca
- Department of Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, Odense
| | - Per Svenningsen
- Department of Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, Odense
| | - Jane Stubbe
- Department of Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, Odense
| | - Yaseelan Palarasah
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark
| | - Daniel F J Ketelhuth
- Department of Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, Odense
| | - Ib Abildgaard Jacobsen
- Research Unit for Cardiovascular and Metabolic Prevention, Department of Endocrinology, Odense University Hospital, Odense C, Denmark
| | - Boye L Jensen
- Department of Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, Odense
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28
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Mas-Bargues C, Alique M, Barrús-Ortiz MT, Borrás C, Rodrigues-Díez R. Exploring New Kingdoms: The Role of Extracellular Vesicles in Oxi-Inflamm-Aging Related to Cardiorenal Syndrome. Antioxidants (Basel) 2021; 11:78. [PMID: 35052582 PMCID: PMC8773353 DOI: 10.3390/antiox11010078] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 12/20/2021] [Accepted: 12/23/2021] [Indexed: 12/12/2022] Open
Abstract
The incidence of age associated chronic diseases has increased in recent years. Although several diverse causes produce these phenomena, abundant evidence shows that oxidative stress plays a central role. In recent years, numerous studies have focused on elucidating the role of oxidative stress in the development and progression of both aging and chronic diseases, opening the door to the discovery of new underlying mechanisms and signaling pathways. Among them, senolytics and senomorphics, and extracellular vesicles offer new therapeutic strategies to slow the development of aging and its associated chronic diseases by decreasing oxidative stress. In this review, we aim to discuss the role of extracellular vesicles in human cardiorenal syndrome development and their possible role as biomarkers, targets, or vehicles of drugs to treat this syndrome.
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Affiliation(s)
- Cristina Mas-Bargues
- Grupo de Investigación Freshage, Departmento de Fisiología, Facultad de Medicina, Universidad de Valencia, 46010 Valencia, Spain; (C.M.-B.); (C.B.)
- Instituto Sanitario de Investigación INCLIVA, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red Fragilidad y Envejecimiento Saludable, Instituto de Salud Carlos III (CIBERFES, ISCIII), 28029 Madrid, Spain
| | - Matilde Alique
- Departamento de Biología de Sistemas, Universidad de Alcalá, 28871 Madrid, Spain;
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034 Madrid, Spain
| | - María Teresa Barrús-Ortiz
- Área de Fisiología, Departamento de Ciencias Básicas de la Salud, Facultad de Ciencias de la Salud, Univesidad Rey Juan Carlos, Avenida de Atenas s/n, 28922 Madrid, Spain
| | - Consuelo Borrás
- Grupo de Investigación Freshage, Departmento de Fisiología, Facultad de Medicina, Universidad de Valencia, 46010 Valencia, Spain; (C.M.-B.); (C.B.)
- Instituto Sanitario de Investigación INCLIVA, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red Fragilidad y Envejecimiento Saludable, Instituto de Salud Carlos III (CIBERFES, ISCIII), 28029 Madrid, Spain
| | - Raquel Rodrigues-Díez
- Departamento de Farmacología, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain;
- Instituto de Investigación Hospital La Paz (IdiPAZ), 28046 Madrid, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Cardiovasculares (CIBERCV), 08036 Barcelona, Spain
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29
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Murray EC, Nosalski R, MacRitchie N, Tomaszewski M, Maffia P, Harrison DG, Guzik TJ. Therapeutic targeting of inflammation in hypertension: from novel mechanisms to translational perspective. Cardiovasc Res 2021; 117:2589-2609. [PMID: 34698811 PMCID: PMC9825256 DOI: 10.1093/cvr/cvab330] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 10/14/2021] [Accepted: 10/21/2021] [Indexed: 01/18/2023] Open
Abstract
Both animal models and human observational and genetic studies have shown that immune and inflammatory mechanisms play a key role in hypertension and its complications. We review the effects of immunomodulatory interventions on blood pressure, target organ damage, and cardiovascular risk in humans. In experimental and small clinical studies, both non-specific immunomodulatory approaches, such as mycophenolate mofetil and methotrexate, and medications targeting T and B lymphocytes, such as tacrolimus, cyclosporine, everolimus, and rituximab, lower blood pressure and reduce organ damage. Mechanistically targeted immune interventions include isolevuglandin scavengers to prevent neo-antigen formation, co-stimulation blockade (abatacept, belatacept), and anti-cytokine therapies (e.g. secukinumab, tocilizumab, canakinumab, TNF-α inhibitors). In many studies, trial designs have been complicated by a lack of blood pressure-related endpoints, inclusion of largely normotensive study populations, polypharmacy, and established comorbidities. Among a wide range of interventions reviewed, TNF-α inhibitors have provided the most robust evidence of blood pressure lowering. Treatment of periodontitis also appears to deliver non-pharmacological anti-hypertensive effects. Evidence of immunomodulatory drugs influencing hypertension-mediated organ damage are also discussed. The reviewed animal models, observational studies, and trial data in humans, support the therapeutic potential of immune-targeted therapies in blood pressure lowering and in hypertension-mediated organ damage. Targeted studies are now needed to address their effects on blood pressure in hypertensive individuals.
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Affiliation(s)
- Eleanor C Murray
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, G12 8TA Glasgow, UK
| | - Ryszard Nosalski
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, G12 8TA Glasgow, UK,Department of Internal Medicine, Collegium Medicum, Jagiellonian University, 31-008 Kraków, Poland
| | - Neil MacRitchie
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, G12 8TA Glasgow, UK
| | - Maciej Tomaszewski
- Division of Cardiovascular Sciences, Faculty of Medicine, Biology and Health, University of Manchester, M13 9PL Manchester, UK,Manchester Heart Centre and Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, M13 9WL Manchester, UK
| | - Pasquale Maffia
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, G12 8TA Glasgow, UK,Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, G12 8TA Glasgow, UK,Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy
| | - David G Harrison
- Division of Clinical Pharmacology, Department of Medicine, Vanderbildt University Medical Centre, Nashville, 37232 TN, USA
| | - Tomasz J Guzik
- Corresponding author. Tel: +44 141 3307590; fax: +44 141 3307590, E-mail:
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30
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Abais-Battad JM, Saravia FL, Lund H, Dasinger JH, Fehrenbach DJ, Alsheikh AJ, Zemaj J, Kirby JR, Mattson DL. Dietary influences on the Dahl SS rat gut microbiota and its effects on salt-sensitive hypertension and renal damage. Acta Physiol (Oxf) 2021; 232:e13662. [PMID: 33866692 PMCID: PMC9835005 DOI: 10.1111/apha.13662] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 04/07/2021] [Accepted: 04/11/2021] [Indexed: 01/14/2023]
Abstract
AIM Our previous studies have demonstrated the importance of dietary factors in the determination of hypertension in Dahl salt-sensitive (SS) rats. Since the gut microbiota has been implicated in chronic diseases like hypertension, we hypothesized that dietary alterations shift the microbiota to mediate the development of salt-sensitive hypertension and renal disease. METHODS This study utilized SS rats from the Medical College of Wisconsin (SS/MCW) maintained on a purified, casein-based diet (0.4% NaCl AIN-76A, Dyets) and from Charles River Laboratories (SS/CRL) fed a whole grain diet (0.75% NaCl 5L79, LabDiet). Faecal 16S rDNA sequencing was used to phenotype the gut microbiota. Directly examining the contribution of the gut microbiota, SS/CRL rats were administered faecal microbiota transfer (FMT) experiments with either SS/MCW stool or vehicle (Vehl) in conjunction with the HS AIN-76A diet. RESULTS SS/MCW rats exhibit renal damage and inflammation when fed high salt (HS, 4.0% NaCl AIN-76A), which is significantly attenuated in SS/CRL. Gut microbiota phenotyping revealed distinct profiles that correlate with disease severity. SS/MCW FMT worsened the SS/CRL response to HS, evidenced by increased albuminuria (67.4 ± 6.9 vs 113.7 ± 25.0 mg/day, Vehl vs FMT, P = .007), systolic arterial pressure (158.6 ± 5.8 vs 177.8 ± 8.9 mmHg, Vehl vs FMT, P = .09) and renal T-cell infiltration (1.9-fold). Amplicon sequence variant (ASV)-based analysis of faecal 16S rDNA sequencing data revealed taxa that significantly shifted with FMT: Erysipelotrichaceae_2, Parabacteroides gordonii, Streptococcus alactolyticus, Bacteroidales_1, Desulfovibrionaceae_2, Ruminococcus albus. CONCLUSIONS These data demonstrate that dietary modulation of the gut microbiota directly contributes to the development of Dahl SS hypertension and renal injury.
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Affiliation(s)
- Justine M. Abais-Battad
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Fatima L. Saravia
- Department of Microbiology & Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Hayley Lund
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - John Henry Dasinger
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Daniel J. Fehrenbach
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Ammar J. Alsheikh
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Jeylan Zemaj
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - John R. Kirby
- Department of Microbiology & Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - David L. Mattson
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
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31
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Veiras LC, Shen JZY, Bernstein EA, Regis GC, Cao D, Okwan-Duodu D, Khan Z, Gibb DR, Dominici FP, Bernstein KE, Giani JF. Renal Inflammation Induces Salt Sensitivity in Male db/db Mice through Dysregulation of ENaC. J Am Soc Nephrol 2021; 32:1131-1149. [PMID: 33731332 PMCID: PMC8259671 DOI: 10.1681/asn.2020081112] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 01/21/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Hypertension is considered a major risk factor for the progression of diabetic kidney disease. Type 2 diabetes is associated with increased renal sodium reabsorption and salt-sensitive hypertension. Clinical studies show that men have higher risk than premenopausal women for the development of diabetic kidney disease. However, the renal mechanisms that predispose to salt sensitivity during diabetes and whether sexual dimorphism is associated with these mechanisms remains unknown. METHODS Female and male db/db mice exposed to a high-salt diet were used to analyze the progression of diabetic kidney disease and the development of hypertension. RESULTS Male, 34-week-old, db/db mice display hypertension when exposed to a 4-week high-salt treatment, whereas equivalently treated female db/db mice remain normotensive. Salt-sensitive hypertension in male mice was associated with no suppression of the epithelial sodium channel (ENaC) in response to a high-salt diet, despite downregulation of several components of the intrarenal renin-angiotensin system. Male db/db mice show higher levels of proinflammatory cytokines and more immune-cell infiltration in the kidney than do female db/db mice. Blocking inflammation, with either mycophenolate mofetil or by reducing IL-6 levels with a neutralizing anti-IL-6 antibody, prevented the development of salt sensitivity in male db/db mice. CONCLUSIONS The inflammatory response observed in male, but not in female, db/db mice induces salt-sensitive hypertension by impairing ENaC downregulation in response to high salt. These data provide a mechanistic explanation for the sexual dimorphism associated with the development of diabetic kidney disease and salt sensitivity.
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Affiliation(s)
- Luciana C. Veiras
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California
| | - Justin Z. Y. Shen
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California
| | - Ellen A. Bernstein
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California
| | - Giovanna C. Regis
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California
| | - DuoYao Cao
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California
| | - Derick Okwan-Duodu
- Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Zakir Khan
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California
| | - David R. Gibb
- Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Fernando P. Dominici
- Department of Biological Chemistry, School of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina
| | - Kenneth E. Bernstein
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California,Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Jorge F. Giani
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California,Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, California
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Gao H, Bigalke J, Jiang E, Fan Y, Chen B, Chen QH, Shan Z. TNFα Triggers an Augmented Inflammatory Response in Brain Neurons from Dahl Salt-Sensitive Rats Compared with Normal Sprague Dawley Rats. Cell Mol Neurobiol 2021; 42:1787-1800. [PMID: 33625627 PMCID: PMC8382783 DOI: 10.1007/s10571-021-01056-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 02/04/2021] [Indexed: 12/23/2022]
Abstract
Tumor Necrosis Factor (TNF)-α is a proinflammatory cytokine (PIC) and has been implicated in a variety of illness including cardiovascular disease. The current study investigated the inflammatory response trigged by TNFα in both cultured brain neurons and the hypothalamic paraventricular nucleus (PVN), a key cardiovascular relevant brain area, of the Sprague Dawley (SD) rats. Our results demonstrated that TNFα treatment induces a dose- and time-dependent increase in mRNA expression of PICs including Interleukin (IL)-1β and Interleukin-6 (IL6); chemokines including C-C Motif Chemokine Ligand 5 (CCL5) and C-C Motif Chemokine Ligand 12 (CCL12), inducible nitric oxide synthase (iNOS), as well as transcription factor NF-kB in cultured brain neurons from neonatal SD rats. Consistent with this finding, immunostaining shows that TNFα treatment increases immunoreactivity of IL1β, CCL5, iNOS and stimulates activation or expression of NF-kB, in both cultured brain neurons and the PVN of adult SD rats. We further compared mRNA expression of the aforementioned genes in basal level as well as in response to TNFα challenge between SD rats and Dahl Salt-sensitive (Dahl-S) rats, an animal model of salt-sensitive hypertension. Dahl-S brain neurons presented higher baseline levels as well as greater response to TNFα challenge in mRNA expression of CCL5, iNOS and IL1β. Furthermore, central administration of TNFα caused significant higher response in CCL12 in the PVN of Dahl-S rats. The increased inflammatory response to TNFα in Dahl-S rats may be indicative of an underlying mechanism for enhanced pressor reactivity to salt intake in the Dahl-S rat model.
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Affiliation(s)
- Huanjia Gao
- Department of Kinesiology & Integrative Physiology, Michigan Technological University, Houghton, MI, 49931, USA.,The Second Clinical College of Guangzhou, University of Chinese Medicine, Guangzhou, China
| | - Jeremy Bigalke
- Department of Kinesiology & Integrative Physiology, Michigan Technological University, Houghton, MI, 49931, USA
| | - Enshe Jiang
- Department of Kinesiology & Integrative Physiology, Michigan Technological University, Houghton, MI, 49931, USA.,Institute of Nursing and Health, Henan University, Henan, China.,Henan International Joint Laboratory of Nuclear Protein Regulation, Henan University, Henan, China
| | - Yuanyuan Fan
- Department of Kinesiology & Integrative Physiology, Michigan Technological University, Houghton, MI, 49931, USA.,School of Life Sciences, Henan University, Henan, China
| | - Bojun Chen
- Department of Emergency, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qing-Hui Chen
- Department of Kinesiology & Integrative Physiology, Michigan Technological University, Houghton, MI, 49931, USA.,Health Research Institute, Michigan Technological University, Houghton, MI, 49931, USA
| | - Zhiying Shan
- Department of Kinesiology & Integrative Physiology, Michigan Technological University, Houghton, MI, 49931, USA. .,Health Research Institute, Michigan Technological University, Houghton, MI, 49931, USA.
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Mattson DL, Dasinger JH, Abais-Battad JM. Amplification of Salt-Sensitive Hypertension and Kidney Damage by Immune Mechanisms. Am J Hypertens 2021; 34:3-14. [PMID: 32725162 PMCID: PMC7891248 DOI: 10.1093/ajh/hpaa124] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/27/2020] [Accepted: 07/23/2020] [Indexed: 12/13/2022] Open
Abstract
Humans with salt-sensitive (SS) hypertension demonstrate increased morbidity, increased mortality, and renal end-organ damage when compared with normotensive subjects or those with salt-resistant hypertension. Increasing evidence indicates that immune mechanisms play an important role in the full development of SS hypertension and associated renal damage. Recent experimental advances and studies in animal models have permitted a greater understanding of the mechanisms of activation and action of immunity in this disease process. Evidence favors a role of both innate and adaptive immune mechanisms that are triggered by initial, immune-independent alterations in blood pressure, sympathetic activity, or tissue damage. Activation of immunity, which can be enhanced by a high-salt intake or by alterations in other components of the diet, leads to the release of cytokines, free radicals, or other factors that amplify renal damage and hypertension and mediate malignant disease.
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Affiliation(s)
- David L Mattson
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - John Henry Dasinger
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Justine M Abais-Battad
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
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34
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Uremic Toxins in the Progression of Chronic Kidney Disease and Cardiovascular Disease: Mechanisms and Therapeutic Targets. Toxins (Basel) 2021; 13:toxins13020142. [PMID: 33668632 PMCID: PMC7917723 DOI: 10.3390/toxins13020142] [Citation(s) in RCA: 130] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 12/24/2022] Open
Abstract
Chronic kidney disease (CKD) is a progressive loss of renal function. The gradual decline in kidney function leads to an accumulation of toxins normally cleared by the kidneys, resulting in uremia. Uremic toxins are classified into three categories: free water-soluble low-molecular-weight solutes, protein-bound solutes, and middle molecules. CKD patients have increased risk of developing cardiovascular disease (CVD), due to an assortment of CKD-specific risk factors. The accumulation of uremic toxins in the circulation and in tissues is associated with the progression of CKD and its co-morbidities, including CVD. Although numerous uremic toxins have been identified to date and many of them are believed to play a role in the progression of CKD and CVD, very few toxins have been extensively studied. The pathophysiological mechanisms of uremic toxins must be investigated further for a better understanding of their roles in disease progression and to develop therapeutic interventions against uremic toxicity. This review discusses the renal and cardiovascular toxicity of uremic toxins indoxyl sulfate, p-cresyl sulfate, hippuric acid, TMAO, ADMA, TNF-α, and IL-6. A focus is also placed on potential therapeutic targets against uremic toxicity.
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35
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Petreski T, Piko N, Ekart R, Hojs R, Bevc S. Review on Inflammation Markers in Chronic Kidney Disease. Biomedicines 2021; 9:182. [PMID: 33670423 PMCID: PMC7917900 DOI: 10.3390/biomedicines9020182] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/04/2021] [Accepted: 02/09/2021] [Indexed: 02/07/2023] Open
Abstract
Chronic kidney disease (CKD) is one of the major health problems of the modern age. It represents an important public health challenge with an ever-lasting rising prevalence, which reached almost 700 million by the year 2017. Therefore, it is very important to identify patients at risk for CKD development and discover risk factors that cause the progression of the disease. Several studies have tackled this conundrum in recent years, novel markers have been identified, and new insights into the pathogenesis of CKD have been gained. This review summarizes the evidence on markers of inflammation and their role in the development and progression of CKD. It will focus primarily on cytokines, chemokines, and cell adhesion molecules. Nevertheless, further large, multicenter studies are needed to establish the role of these markers and confirm possible treatment options in everyday clinical practice.
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Affiliation(s)
- Tadej Petreski
- Department of Nephrology, Clinic for Internal Medicine, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia; (T.P.); (N.P.); (R.H.)
- Department of Internal Medicine and Department of Pharmacology, Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia
| | - Nejc Piko
- Department of Nephrology, Clinic for Internal Medicine, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia; (T.P.); (N.P.); (R.H.)
- Department of Dialysis, Clinic for Internal Medicine, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia;
| | - Robert Ekart
- Department of Internal Medicine and Department of Pharmacology, Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia
- Department of Dialysis, Clinic for Internal Medicine, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia;
| | - Radovan Hojs
- Department of Nephrology, Clinic for Internal Medicine, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia; (T.P.); (N.P.); (R.H.)
- Department of Internal Medicine and Department of Pharmacology, Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia
| | - Sebastjan Bevc
- Department of Nephrology, Clinic for Internal Medicine, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia; (T.P.); (N.P.); (R.H.)
- Department of Internal Medicine and Department of Pharmacology, Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia
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36
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Liu YS, Yang Q, Li S, Luo L, Liu HY, Li XY, Gao ZN. Luteolin attenuates angiotensin II‑induced renal damage in apolipoprotein E‑deficient mice. Mol Med Rep 2020; 23:157. [PMID: 33355379 PMCID: PMC7789115 DOI: 10.3892/mmr.2020.11796] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 11/26/2020] [Indexed: 12/12/2022] Open
Abstract
Renal damage is a common and severe condition encountered in the clinic. Luteolin (Lut) exhibits anti-inflammatory, anti-fibrotic and anti-apoptotic effects. Thus, the present study aimed to investigate the pharmacological effects of Lut on angiotensin II (AngII)-induced renal damage in apolipoprotein E-deficient (ApoE−/−) mice. Male ApoE−/− mice (age, 8 weeks) were randomly divided into the following three groups: i) Control group (n=6); ii) AngII group (n=6); and iii) AngII + Lut group (n=6). Lut was administered by gavage (100 mg/kg/d). ApoE−/− mice were implanted with Alzet osmotic minipumps, filled with either saline vehicle or AngII solution for a maximum period of 4 weeks. After 4 weeks, metabolic characteristics were measured and the histopathological alterations in the kidney tissue were observed. The metabolic characteristics of blood creatinine (CRE) levels were lower in the AngII + Lut group compared with in the AngII group. The expression levels of collagen I and III were lower in the kidney tissues of the AngII + Lut group compared with the corresponding tissues of the AngII group. The gene expression levels of IL-1β, IL-6, TNF-α and IL-10 were also suppressed in the kidney tissues of the AngII + Lut group compared with those in the corresponding tissues of the AngII group. Furthermore, the AngII + Lut group exhibited markedly increased LC3 protein expression and notably decreased p62 protein expression in the kidney tissues compared with the expression levels in the AngII group. The data demonstrated that Lut attenuated AngII-induced collagen deposition and inflammation, while inducing autophagy. Collectively, the results suggested that Lut treatment exhibited a exerted effect on AngII-induced renal injury in ApoE−/− mice.
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Affiliation(s)
- Ying-Shu Liu
- Department of Endocrinology, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian, Liaodong 116011, P.R. China
| | - Qin Yang
- Department of Internal Medicine, The Affiliated Zhong Shan Hospital of Dalian University, Dalian, Liaodong 116011, P.R. China
| | - Shen Li
- Department of Endocrinology, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian, Liaodong 116011, P.R. China
| | - Lan Luo
- Department of Endocrinology, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian, Liaodong 116011, P.R. China
| | - Hong-Yang Liu
- Department of Heart Intensive Care Unit, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaodong 116011, P.R. China
| | - Xin-Yu Li
- Department of Endocrinology, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian, Liaodong 116011, P.R. China
| | - Zheng-Nan Gao
- Department of Endocrinology, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian, Liaodong 116011, P.R. China
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37
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Fehrenbach DJ, Abais-Battad JM, Dasinger JH, Lund H, Keppel T, Zemaj J, Cherian-Shaw M, Gundry RL, Geurts AM, Dwinell MR, Mattson DL. Sexual Dimorphic Role of CD14 (Cluster of Differentiation 14) in Salt-Sensitive Hypertension and Renal Injury. Hypertension 2020; 77:228-240. [PMID: 33249861 DOI: 10.1161/hypertensionaha.120.14928] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Genomic sequence and gene expression association studies in animals and humans have identified genes that may be integral in the pathogenesis of various diseases. CD14 (cluster of differentiation 14)-a cell surface protein involved in innate immune system activation-is one such gene associated with cardiovascular and hypertensive disease. We previously showed that this gene is upregulated in renal macrophages of Dahl salt-sensitive animals fed a high-salt diet; here we test the hypothesis that CD14 contributes to the elevated pressure and renal injury observed in salt-sensitive hypertension. Using CRISPR/Cas9 (clustered regularly interspaced short palindromic repeats/clustered regularly interspaced short palindromic repeat-associated 9), we created a targeted mutation in the CD14 gene on the Dahl SS (SS/JrHSDMcwi) background and validated the absence of CD14 peptides via mass spectrometry. Radiotelemetry was used to monitor blood pressure in wild-type and CD14-/- animals challenged with high salt and identified infiltrating renal immune cells via flow cytometry. Germline knockout of CD14 exacerbated salt-sensitive hypertension and renal injury in female animals but not males. CD14-/- females demonstrated increased infiltrating macrophages but no difference in infiltrating lymphocytes. Transplant of CD14+/+ or CD14-/- bone marrow was used to isolate the effects of CD14 knockout to hematopoietic cells and confirmed that the differential phenotype observed was due to knockout of CD14 in hematopoietic cells. Ovariectomy was used to remove the influence of female sex hormones, which completely abrogated the effect of CD14 knockout. These studies provide a novel treatment target and evidence of a new dichotomy in immune activation between sexes within the context of hypertensive disease where CD14 regulates immune cell activation and renal injury.
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Affiliation(s)
- Daniel J Fehrenbach
- Department of Physiology (D.J.F., H.L., J.Z., A.M.G., M.R.D.), Medical College of Wisconsin, Wauwatosa, WI.,Department of Physiology, Augusta University and the Medical College of Georgia, Augusta, GA (D.J.F., J.M.A.-B., J.H.D., M.C.-S., D.L.M.)
| | - Justine M Abais-Battad
- Department of Physiology, Augusta University and the Medical College of Georgia, Augusta, GA (D.J.F., J.M.A.-B., J.H.D., M.C.-S., D.L.M.)
| | - John Henry Dasinger
- Department of Physiology, Augusta University and the Medical College of Georgia, Augusta, GA (D.J.F., J.M.A.-B., J.H.D., M.C.-S., D.L.M.)
| | - Hayley Lund
- Department of Physiology (D.J.F., H.L., J.Z., A.M.G., M.R.D.), Medical College of Wisconsin, Wauwatosa, WI
| | - Theodore Keppel
- Center for Biomedical Mass Spectrometry Research (T.K., R.L.G.), Medical College of Wisconsin, Wauwatosa, WI
| | - Jeylan Zemaj
- Department of Physiology (D.J.F., H.L., J.Z., A.M.G., M.R.D.), Medical College of Wisconsin, Wauwatosa, WI
| | - Mary Cherian-Shaw
- Department of Physiology, Augusta University and the Medical College of Georgia, Augusta, GA (D.J.F., J.M.A.-B., J.H.D., M.C.-S., D.L.M.)
| | - Rebekah L Gundry
- Center for Biomedical Mass Spectrometry Research (T.K., R.L.G.), Medical College of Wisconsin, Wauwatosa, WI.,CardiOmics Program, Center for Heart and Vascular Research (R.L.G.), University of Nebraska Medical Center, Omaha, NE.,Division of Cardiovascular Medicine (R.L.G.), University of Nebraska Medical Center, Omaha, NE.,Department of Cellular and Integrative Physiology (R.L.G.), University of Nebraska Medical Center, Omaha, NE
| | - Aron M Geurts
- Department of Physiology (D.J.F., H.L., J.Z., A.M.G., M.R.D.), Medical College of Wisconsin, Wauwatosa, WI.,Genomic Sciences and Precision Medicine Center (A.M.G., M.R.D.), Medical College of Wisconsin, Wauwatosa, WI
| | - Melinda R Dwinell
- Department of Physiology (D.J.F., H.L., J.Z., A.M.G., M.R.D.), Medical College of Wisconsin, Wauwatosa, WI.,Genomic Sciences and Precision Medicine Center (A.M.G., M.R.D.), Medical College of Wisconsin, Wauwatosa, WI
| | - David L Mattson
- Department of Physiology, Augusta University and the Medical College of Georgia, Augusta, GA (D.J.F., J.M.A.-B., J.H.D., M.C.-S., D.L.M.)
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Lu J, Bai Z, Kuang X, Li L. [High-salt exposure induces macrophage polarization to promote proliferation and phenotypic transformation of co-cultured renal fibroblasts]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2020; 40:1472-1479. [PMID: 33118503 DOI: 10.12122/j.issn.1673-4254.2020.10.13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To investigate high-salt exposure-induced polarization of mononuclear macrophages and the changes in proliferation and phenotypic transformation of renal fibroblasts in a co-culture system. METHODS Cultured mononuclear macrophages were exposed to high salt (161 mmol/L Na +) for 2 h and the surface markers of M0, M1 and M2-type macrophages were detected with RT-qPCR. The culture medium of the macrophages in normal and high-salt groups was collected for detection of the mRNA and protein levels of IL-6 and TGF-β1 using RT-qPCR and ELISA. A co-culture system of high salt-exposed macrophages and renal fibroblasts (NRK-49F) was established using a Transwell chamber, and the changes in proliferation and migration of NRK-49F cells were examined using EdU assay and Transwell assay, respectively. Western blotting was performed to detect the expressions of collagen I, collagen III and collagen α-SMA in NRK-49F cells. RESULTS The high salt-exposed macrophages showed significantly increased mRNA levels of M2-type macrophage surface markers mannose receptor and arginase (P < 0.05). The results of EdU and Transwell assays showed that NRK-49F cells co-cultured with high salt-exposed macrophages exhibited significantly increased proliferation and migration ability (P < 0.05). Co-culture with high salt-exposed macrophages resulted in significantly enhanced protein expressions of collagen I, collagen III and α-SMA in NRK-49F cells (P < 0.05) and significantly increased levels of IL-6 and TGF-β1 in the culture medium (P < 0.05). CONCLUSIONS High-salt exposure induces polarization of mononuclear macrophages into M2-type macrophages and promotes secretion of IL-6 and TGF-β1 by the macrophages to induce the proliferation and phenotypic transformation of NRK-49F cells.
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Affiliation(s)
- Jing Lu
- Department of Pathology, Zunyi Medical and Pharmaceutical College, Zunyi 563000, China
| | - Zhixun Bai
- Department of Nephrology, Second Affiliated Hospital of Zunyi Medical University, Zunyi 563000, China
| | - Xiaoyan Kuang
- Department of Pathology, Zunyi Medical and Pharmaceutical College, Zunyi 563000, China
| | - Ling Li
- Department of Pathology, Zunyi Medical and Pharmaceutical College, Zunyi 563000, China
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Gavriliouk EV, Evsegneeva IV, Mikhin VP. Antihypertensive Pharmacotherapy in Correcting the Indicators of Innate Immunity in Patients with Essential Arterial Hypertension. RESEARCH RESULTS IN PHARMACOLOGY 2020. [DOI: 10.3897/rrpharmacology.6.58787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Introduction: The study of indicators of innate immunity in patients with arterial hypertension in clinical trials makes it necessary to correct them in order to reduce vascular inflammation in arterial hypertension to prevent damage to target organs and development of cardiovascular complications. The aim of the study was to assess the effectiveness of antihypertensive therapy to correct indicators of innate immunity in patients with essential arterial hypertension.
Materials and methods: Patients with essential arterial hypertension (EAH) (II stage, 3rd degree) were divided into 3 groups: the 1st group included the patients with hypertrophy of the left ventricular myocardium; the 2nd group included the patients with atherosclerotic vascular lesions; the 3rd group included the patients with chronic kidney disease. As an initial antihypertensive pharmacotherapy, all the patients with essential arterial hypertension were prescribed perindopril (5–10 mg/day) and amlodipine (5–10 mg/day).
Results and discussion: Changes in innate immunity indices in patients with essential arterial hypertension (II stage, 3rd degree) are differentiated depending on the affected target organ. The antihypertensive pharmacotherapy with perindopril and amlodipine in patients with essential arterial hypertension has various corrective effects on impaired innate immunity, depending on the nature of target organ damage. Regardless of target organ damage, ноу antihypertensive therapy with perindopril and amlodipine does not affect the reduced functional and increased metabolic activities of peripheral blood neutrophils.
Conclusion: The results obtained dictate the need for further clinical studies of other classes of antihypertensive drugs and their combinations in the correction of innate immunity indices in order to effectively prevent the progression of target organ damage.
Graphical abstract
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Salt-dependent hypertension and inflammation: targeting the gut-brain axis and the immune system with Brazilian green propolis. Inflammopharmacology 2020; 28:1163-1182. [PMID: 32785827 PMCID: PMC8826348 DOI: 10.1007/s10787-020-00742-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 07/30/2020] [Indexed: 01/22/2023]
Abstract
Systemic arterial hypertension (SAH) is a major health problem around the world and its development has been associated with exceeding salt consumption by the modern society. The mechanisms by which salt consumption increase blood pressure (BP) involve several homeostatic systems but many details have not yet been fully elucidated. Evidences accumulated over the last 60 decades raised the involvement of the immune system in the hypertension development and opened a range of possibilities for new therapeutic targets. Green propolis is a promising natural product with potent anti-inflammatory properties acting on specific targets, most of them participating in the gut-brain axis of the sodium-dependent hypertension. New anti-hypertensive products reinforce the therapeutic arsenal improving the corollary of choices, especially in those cases where patients are resistant or refractory to conventional therapy. This review sought to bring the newest advances in the field articulating evidences that show a cross-talking between inflammation and the central mechanisms involved with the sodium-dependent hypertension as well as the stablished actions of green propolis and some of its biologically active compounds on the immune cells and cytokines that would be involved with its anti-hypertensive properties.
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Sucedaram Y, Johns EJ, Husain R, Sattar MA, Abdulla M, Khalilpourfarshbafi M, Abdullah NA. Comparison of high-fat style diet-induced dysregulation of baroreflex control of renal sympathetic nerve activity in intact and ovariectomized female rats: Renal sympathetic nerve activity in high-fat style diet fed intact and ovariectomized female rats. Exp Biol Med (Maywood) 2020; 245:761-776. [PMID: 32212858 DOI: 10.1177/1535370220915673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
IMPACT STATEMENT Over activation of renal sensory nerve in obesity blunts the normal regulation of renal sympathetic nerve activity. To date, there is no investigation that has been carried out on baroreflex regulation of renal sympathetic nerve activity in obese ovarian hormones deprived rat model, and the effect of renal denervation on the baroreflex regulation of renal sympathetic nerve activity. Thus, we investigated the role of renal innervation on baroreflex regulation of renal sympathetic nerve activity in obese intact and ovariectomized female rats. Our data demonstrated that in obese states, the impaired baroreflex control is indistinguishable between ovarian hormones deprived and non-deprived states. This study will be of substantial interest to researchers working on the impact of diet-induced hypertension in pre- and postmenopausal women. This study provides insight into health risks amongst obese women regardless of their ovarian hormonal status and may be integrated in preventive health strategies.
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Affiliation(s)
- Yamuna Sucedaram
- Department of Pharmacology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Edward James Johns
- Department of Physiology, University College Cork, Cork T12 K8AF, Ireland
| | - Ruby Husain
- Department of Physiology, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Munavvar Abdul Sattar
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, USM Pulau Pinang 11800, Malaysia.,Faculty of Pharmacy, MAHSA University, Jenjarom 42610, Malaysia
| | - Mohammed Abdulla
- Department of Physiology, University College Cork, Cork T12 K8AF, Ireland
| | | | - Nor Azizan Abdullah
- Department of Pharmacology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur 50603, Malaysia
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Jörns A, Ishikawa D, Teraoku H, Yoshimoto T, Wedekind D, Lenzen S. Remission of autoimmune diabetes by anti-TCR combination therapies with anti-IL-17A or/and anti-IL-6 in the IDDM rat model of type 1 diabetes. BMC Med 2020; 18:33. [PMID: 32106855 PMCID: PMC7047363 DOI: 10.1186/s12916-020-1503-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 01/27/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The cytokine IL-17 is a key player in autoimmune processes, while the cytokine IL-6 is responsible for the chronification of inflammation. However, their roles in type 1 diabetes development are still unknown. METHODS Therefore, therapies for 5 days with anti-IL-17A or anti-IL-6 in combination with a T cell-specific antibody, anti-TCR, or in a triple combination were initiated immediately after disease manifestation to reverse the diabetic metabolic state in the LEW.1AR1-iddm (IDDM) rat, a model of human type 1 diabetes. RESULTS Monotherapies with anti-IL-6 or anti-IL-17 showed no sustained anti-diabetic effects. Only the combination therapy of anti-TCR with anti-IL-6 or anti-IL-17 at starting blood glucose concentrations up to 12 mmol/l restored normoglycaemia. The triple antibody combination therapy was effective even up to very high initial blood glucose concentrations (17 mmol/l). The β cell mass was raised to values of around 6 mg corresponding to those of normoglycaemic controls. In parallel, the apoptosis rate of β cells was reduced and the proliferation rate increased as well as the islet immune cell infiltrate was strongly reduced in double and abolished in triple combination therapies. CONCLUSIONS The anti-TCR combination therapy with anti-IL-17 preferentially raised the β cell mass as a result of β cell proliferation while anti-IL-6 strongly reduced β cell apoptosis and the islet immune cell infiltrate with a modest increase of the β cell mass only. The triple combination therapy achieved both goals in a complimentary anti-autoimmune and anti-inflammatory action resulting in sustained normoglycaemia with normalized serum C-peptide concentrations.
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Affiliation(s)
- Anne Jörns
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
| | - Daichi Ishikawa
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
- Institute of Experimental Diabetes Research, Hannover Medical School, 30623, Hannover, Germany
| | - Hiroki Teraoku
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
- Institute of Experimental Diabetes Research, Hannover Medical School, 30623, Hannover, Germany
| | - Toshiaki Yoshimoto
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
- Institute of Experimental Diabetes Research, Hannover Medical School, 30623, Hannover, Germany
| | - Dirk Wedekind
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Sigurd Lenzen
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany.
- Institute of Experimental Diabetes Research, Hannover Medical School, 30623, Hannover, Germany.
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Lu X, Rudemiller NP, Privratsky JR, Ren J, Wen Y, Griffiths R, Crowley SD. Classical Dendritic Cells Mediate Hypertension by Promoting Renal Oxidative Stress and Fluid Retention. Hypertension 2019; 75:131-138. [PMID: 31786985 DOI: 10.1161/hypertensionaha.119.13667] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
FLT3L (Fms-like tyrosine kinase 3 ligand) stimulates the development of classical dendritic cells (DCs). Here we tested the hypothesis that classical DCs drive blood pressure elevation by promoting renal fluid retention. FLT3L-deficient (FLT3L-/-) mice that lack classical DCs in the kidney had mean arterial pressures similar to wild-types (WTs) at baseline but had blunted hypertensive responses during 4 weeks of chronic Ang II (angiotensin II) infusion. In FLT3L-/- mice, the proportions of effector memory T cells in the kidney were similar to those in WTs at baseline. However, after Ang II infusion, proportions of effector memory T cells were dramatically lower in the FLT3L-/- kidneys versus WTs, indicating that classical DCs augment the renal accumulation of effector T cells after renin-angiotensin system activation. Consistent with their lower blood pressures, the Ang II-infused FLT3L-/- mice had attenuated cardiac hypertrophy and lower renal mRNA expression for pro-hypertensive cytokines. Moreover, the Ang II-infused FLT3L-/- mice had lower urinary excretion of the oxidative stress marker 8-isoprostane and lower renal mRNA levels of nicotinamide adenine dinucleotide phosphate oxidase 2. In an intraperitoneal saline challenge test at day 7 of Ang II, FLT3L-/- mice excreted higher proportions of the injected volume and sodium than WTs. Consistent with this enhanced diuresis, mRNA expressions for the sodium chloride cotransporter and all 3 subunits of the epithelial sodium channel were diminished by >40% in FLT3L-/- kidneys compared with the WTs. Thus, classical FLT3L-dependent DCs promote renal T-cell activation with consequent oxidative stress, fluid retention, and blood pressure elevation.
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Affiliation(s)
- Xiaohan Lu
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., J.R.P., J.R., Y.W., R.G., S.D.C.)
| | - Nathan P Rudemiller
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., J.R.P., J.R., Y.W., R.G., S.D.C.)
| | - Jamie R Privratsky
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., J.R.P., J.R., Y.W., R.G., S.D.C.)
| | - Jiafa Ren
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., J.R.P., J.R., Y.W., R.G., S.D.C.)
| | - Yi Wen
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., J.R.P., J.R., Y.W., R.G., S.D.C.)
| | - Robert Griffiths
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., J.R.P., J.R., Y.W., R.G., S.D.C.)
| | - Steven D Crowley
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., J.R.P., J.R., Y.W., R.G., S.D.C.).,Department of Immunology, Duke University School of Medicine, Durham, NC (S.D.C.)
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Lu X, Rudemiller NP, Wen Y, Ren J, Hammer GE, Griffiths R, Privratsky JR, Yang B, Sparks MA, Crowley SD. A20 in Myeloid Cells Protects Against Hypertension by Inhibiting Dendritic Cell-Mediated T-Cell Activation. Circ Res 2019; 125:1055-1066. [PMID: 31630621 DOI: 10.1161/circresaha.119.315343] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
RATIONALE The ubiquitin-editing protein A20 in dendritic cells (DCs) suppresses NF-κB (nuclear factor-κB) signaling and constrains DC-mediated T-cell stimulation, but the role of A20 in modulating the hypertensive response requires elucidation. OBJECTIVE Here, we tested the hypothesis that A20 in CD11c-expressing myeloid cells mitigates Ang II (angiotensin II)-induced hypertension by limiting renal T-cell activation. METHODS AND RESULTS Mice with heterozygous deletion of A20 in CD11c-expressing myeloid cells (DC ACT[Cd11c-Cre+ A20flox/wt]) have spontaneous DC activation but have normal baseline blood pressures. In response to low-dose chronic Ang II infusion, DC ACT mice compared with WT (wild type) controls had an exaggerated hypertensive response and augmented proportions of CD62LloCD44hi effector memory T lymphocytes in the kidney lymph node. After 10 days of Ang II, DC ACT kidneys had increased numbers of memory effector CD8+, but not CD4+ T cells, compared with WTs. Moreover, the expressions of TNF-α (tumor necrosis factor-α) and IFN-γ (interferon-γ) were upregulated in the DC ACT renal CD8+ T cells but not CD4+ T cells. Saline challenge testing revealed enhanced renal fluid retention in the DC ACT mice. DC ACT kidneys showed augmented protein expression of γ-epithelial sodium channel and NHE3 (sodium-hydrogen antiporter 3). DC ACT mice also had greater reductions in renal blood flow following acute injections with Ang II and enhanced oxidant stress in the vasculature as evidenced by higher circulating levels of malondialdehyde compared with WT controls. To directly test whether enhanced T-cell activation in the DC ACT cohort was responsible for their exaggerated hypertensive response, we chronically infused Ang II into lymphocyte-deficient DC ACT Rag1 (recombination activating protein 1)-deficient (Rag1-/-) mice and WT (Cd11c-Cre- A20flox/wt) Rag1-/- controls. The difference in blood pressure elevation accruing from DC activation was abrogated on the Rag1-/- strain. CONCLUSIONS Following stimulation of the renin-angiotensin system, A20 suppresses DC activation and thereby mitigates T-cell-dependent blood pressure elevation.
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Affiliation(s)
- Xiaohan Lu
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., Y.W., J.R., R.G., J.R.P., B.Y., M.A.S., S.D.C.)
| | - Nathan P Rudemiller
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., Y.W., J.R., R.G., J.R.P., B.Y., M.A.S., S.D.C.)
| | - Yi Wen
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., Y.W., J.R., R.G., J.R.P., B.Y., M.A.S., S.D.C.)
| | - Jiafa Ren
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., Y.W., J.R., R.G., J.R.P., B.Y., M.A.S., S.D.C.)
| | - Gianna E Hammer
- Department of Immunology, Duke University School of Medicine, Durham, NC (G.E.H.).,Department of Molecular Genetics and Microbiology, Durham, NC (G.E.H.)
| | - Robert Griffiths
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., Y.W., J.R., R.G., J.R.P., B.Y., M.A.S., S.D.C.)
| | - Jamie R Privratsky
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., Y.W., J.R., R.G., J.R.P., B.Y., M.A.S., S.D.C.)
| | - Bo Yang
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., Y.W., J.R., R.G., J.R.P., B.Y., M.A.S., S.D.C.)
| | - Matthew A Sparks
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., Y.W., J.R., R.G., J.R.P., B.Y., M.A.S., S.D.C.)
| | - Steven D Crowley
- From the Division of Nephrology, Department of Medicine, Duke University and Durham VA Medical Centers, NC (X.L., N.P.R., Y.W., J.R., R.G., J.R.P., B.Y., M.A.S., S.D.C.)
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Wenzel P. Monocytes as immune targets in arterial hypertension. Br J Pharmacol 2019; 176:1966-1977. [PMID: 29885051 PMCID: PMC6534790 DOI: 10.1111/bph.14389] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 05/25/2018] [Accepted: 05/30/2018] [Indexed: 12/11/2022] Open
Abstract
The role of myelomonocytic cells appears to be critical for the initiation, progression and manifestation of arterial hypertension. Monocytes can induce vascular inflammation as well as tissue remodelling and (mal)adaptation by secreting chemokines and cytokines, producing ROS, expressing coagulation factors and transforming into macrophages. A multitude of adhesion molecules promote the infiltration and accumulation of monocytes into the kidney, heart, brain and vasculature in hypertension. All these facets offer the possibility to pharmacologically target monocytes and may represent novel therapeutic ways to treat hypertension, attenuate hypertension-associated end organ damage or prevent the development or worsening of high blood pressure. LINKED ARTICLES: This article is part of a themed section on Immune Targets in Hypertension. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.12/issuetoc.
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Affiliation(s)
- Philip Wenzel
- Center for Cardiology ‐ Cardiology IUniversity Medical Center MainzMainzGermany
- Center for Thrombosis and HemostasisUniversity Medical Center MainzMainzGermany
- German Center for Cardiovascular Research (DZHK), partner site Rhine‐Main
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Bomfim GF, Cau SBA, Bruno AS, Fedoce AG, Carneiro FS. Hypertension: a new treatment for an old disease? Targeting the immune system. Br J Pharmacol 2019; 176:2028-2048. [PMID: 29969833 PMCID: PMC6534786 DOI: 10.1111/bph.14436] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/14/2018] [Accepted: 06/24/2018] [Indexed: 12/22/2022] Open
Abstract
Arterial hypertension represents a serious public health problem, being a major cause of morbidity and mortality worldwide. The availability of many antihypertensive therapeutic strategies still fails to adequately treat around 20% of hypertensive patients, who are considered resistant to conventional treatment. In the pathogenesis of hypertension, immune system mechanisms are activated and both the innate and adaptive immune responses play a crucial role. However, what, when and how the immune system is triggered during hypertension development is still largely undefined. In this context, this review highlights scientific advances in the manipulation of the immune system in order to attenuate hypertension and end-organ damage. Here, we discuss the potential use of immunosuppressants and immunomodulators as pharmacological tools to control the activation of the immune system, by non-specific and specific mechanisms, to treat hypertension and improve end-organ damage. Nevertheless, more clinical trials should be performed with these drugs to establish their therapeutic efficacy, safety and risk-benefit ratio in hypertensive conditions. LINKED ARTICLES: This article is part of a themed section on Immune Targets in Hypertension. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.12/issuetoc.
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Affiliation(s)
| | - Stefany Bruno Assis Cau
- Department of Pharmacology, Institute of Biological ScienceFederal University of Minas GeraisBelo HorizonteMGBrazil
| | - Alexandre Santos Bruno
- Department of Pharmacology, Institute of Biological ScienceFederal University of Minas GeraisBelo HorizonteMGBrazil
| | - Aline Garcia Fedoce
- Department of Pharmacology, Ribeirão Preto Medical SchoolUniversity of São PauloSão PauloBrazil
| | - Fernando S Carneiro
- Department of Pharmacology, Ribeirão Preto Medical SchoolUniversity of São PauloSão PauloBrazil
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Abstract
PURPOSE OF REVIEW Despite enhanced screening and therapeutic management, hypertension remains the most prevalent chronic disease in the United States and the leading cause of heart disease, chronic kidney disease, and stroke in both men and women. It is widely accepted that hypertension is a pro-inflammatory disease and that the immune system plays a vital role in mediating hypertensive outcomes and end organ damage. Despite known discrepancies in the risk of hypertension development between men and women, preclinical models of immune-mediated hypertension were historically developed solely in male animals, leading to a lack of sex-specific clinical practice guidelines or therapeutic targets. RECENT FINDINGS Following the NIH policy on the consideration of sex as a biological variable in 2015, significant advancements have been made into sex-specific disease mechanisms in inflammation and hypertension. This review article serves to critically evaluate recent advancements in the field of sex-specific immune-mediated hypertension.
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Affiliation(s)
- Megan A Sylvester
- Department of Physiology, College of Medicine, University of Arizona, 1656 E. Mabel St/Rm 417, P.O. Box 245218, Tucson, AZ, 85724-5218, USA
| | - Heddwen L Brooks
- Department of Physiology, College of Medicine, University of Arizona, 1656 E. Mabel St/Rm 417, P.O. Box 245218, Tucson, AZ, 85724-5218, USA. .,Sarver Heart Center, University of Arizona, Tucson, AZ, USA.
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Fernandes R, Garver H, Harkema JR, Galligan JJ, Fink GD, Xu H. Sex Differences in Renal Inflammation and Injury in High-Fat Diet-Fed Dahl Salt-Sensitive Rats. Hypertension 2019; 72:e43-e52. [PMID: 30354819 DOI: 10.1161/hypertensionaha.118.11485] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We examined the impact of sex on high-fat diet (HFD)-induced renal alterations in Dahl salt-sensitive and Sprague Dawley rats. In Dahl rats, HFD (60% kcal from fat for 24-26 weeks starting at weaning) significantly and equally increased blood pressure in males and females when compared with rats fed a control diet (10% kcal from fat). Male Dahl rats on HFD exhibited progressive renal histological injury and moderately increased renal macrophage infiltration at 10 and 24 weeks of feeding when compared with males on control diet. Female Dahl rats had lower grade renal injury and less macrophage infiltration (except at 17 weeks) than males regardless of diet. Male Dahl rats on both diets showed progressively increasing numbers of renal T-cells, a pattern not observed in females. HFD per se did not significantly affect renal T-cell number. Male Dahl rats had lower renal regulatory T-cells cell ratio than females at 24 weeks. Renal macrophage and T-cell infiltrations were highly correlated to final mean arterial pressure levels in males but not in females. Sprague Dawley rats fed HFD were normotensive without significant renal injury/inflammation after 24 weeks of feeding. In summary, HFD feeding fails to increase arterial blood pressure in Sprague Dawley rats but strongly promotes hypertension in both male and female Dahl salt-sensitive rats. Only Dahl males, however, exhibited blood pressure-associated renal inflammation and injury. Maintenance of regulatory T-cells ratio may protect against hypertension-associated renal injury/inflammation but not HFD-induced hypertension.
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Affiliation(s)
- Roxanne Fernandes
- From the Department of Pharmacology and Toxicology, Michigan State University, East Lansing (R.F., H.G., J.J.G., G.D.F., H.X.)
| | - Hannah Garver
- From the Department of Pharmacology and Toxicology, Michigan State University, East Lansing (R.F., H.G., J.J.G., G.D.F., H.X.)
| | - Jack R Harkema
- Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing (J.R.H.)
| | - James J Galligan
- From the Department of Pharmacology and Toxicology, Michigan State University, East Lansing (R.F., H.G., J.J.G., G.D.F., H.X.).,Neuroscience Program, Michigan State University, East Lansing (J.J.G., G.D.F., H.X.)
| | - Gregory D Fink
- From the Department of Pharmacology and Toxicology, Michigan State University, East Lansing (R.F., H.G., J.J.G., G.D.F., H.X.).,Neuroscience Program, Michigan State University, East Lansing (J.J.G., G.D.F., H.X.)
| | - Hui Xu
- From the Department of Pharmacology and Toxicology, Michigan State University, East Lansing (R.F., H.G., J.J.G., G.D.F., H.X.).,Neuroscience Program, Michigan State University, East Lansing (J.J.G., G.D.F., H.X.)
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Regal JF, Laule CF, McCutcheon L, Root KM, Lund H, Hashmat S, Mattson DL. The complement system in hypertension and renal damage in the Dahl SS rat. Physiol Rep 2019; 6:e13655. [PMID: 29595916 PMCID: PMC5875537 DOI: 10.14814/phy2.13655] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/25/2018] [Accepted: 02/26/2018] [Indexed: 11/24/2022] Open
Abstract
Evidence indicates the immune system is important in development of hypertension and kidney disease. In the Dahl Salt-Sensitive (SS) rat model, lymphocytes play a role in development of hypertension and kidney damage after increased sodium intake. Recent transcriptomic analyses demonstrate upregulation of the innate immune complement system in the kidney of Dahl SS rat fed a high-salt diet, leading us to hypothesize that inhibition of complement activation would attenuate development of hypertension and kidney damage. Male Dahl SS rats on a low salt (0.4% NaCl) diet were instrumented with telemeters for continuous monitoring of arterial blood pressure. Animals received saline vehicle (Control) or sCR1, a soluble form of endogenous Complement Receptor 1 (CR1; CD35) that inhibits complement activation. At Day 0, rats were switched to high salt (4.0% NaCl) diet and assigned to sCR1 (15 mg/kg per day) or Control groups with daily ip injections either days 1-7 or days 14-18. Urine was collected overnight for determination of albumin excretion. Treatment with sCR1, either immediately after high-salt diet was initiated, or at days 14-18, did not alter development of hypertension or albuminuria. The sCR1 dose effectively inhibited total hemolytic complement activity as well as C3a generation. High salt caused an increase in message for complement regulator Cd59, with minimal change in Crry that controls the C3 convertase. Thus, innate immune complement activation in the circulation is not critical for development of hypertension and kidney damage due to increased sodium intake, and therapeutic manipulation of the complement system is not indicated in salt-sensitive hypertension.
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Affiliation(s)
- Jean F Regal
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Connor F Laule
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Luke McCutcheon
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Kate M Root
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Hayley Lund
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Shireen Hashmat
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - David L Mattson
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
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Abstract
PURPOSE OF REVIEW Low-grade inflammation drives elevations in blood pressure (BP) and consequent target organ damage in diverse experimental models of hypertension. Here, we discuss recent advances elucidating immune-mediated mechanisms of BP elevation and associated target organ damage. RECENT FINDINGS Inflammatory mediators produced by immune cells or target organs act on the kidney, vasculature, skin, and nervous system to modulate hypertension. For example, cells of the innate immune system, including monocytes, neutrophils, and dendritic cells (DCs), can all promote BP elevation via actions in the vasculature and kidney. Macrophages expressing VEGF-C impact non-osmotic sodium storage in the skin that in turn regulates salt sensitivity. Within the adaptive immune system, activated T cells can secrete tumor necrosis factor-alpha (TNF-α), interleukin-17a (IL-17a), and interferon-gamma (IFN-γ), each of which has augmented BP and renal damage in pre-clinical models. Inversely, deficiency of IL-17a in mice blunts the hypertensive response and attenuates renal sodium retention via a serum- and glucocorticoid-regulated kinase 1 (SGK1)-dependent pathway. Linking innate and adaptive immune responses, dendritic cells activated by augmented extracellular sodium concentrations stimulate T lymphocytes to produce pro-hypertensive cytokines. By contrast, regulatory T cells (Tregs) can protect against hypertension and associated kidney injury. Rodent studies reveal diverse mechanisms via which cells of the innate and adaptive immune systems drive blood pressure elevation by altering the inflammatory milieu in the kidney, vasculature, and brain.
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