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Costa RM, Cerqueira DM, Francis L, Bruder-Nascimento A, Alves JV, Sims-Lucas S, Ho J, Bruder-Nascimento T. In utero exposure to maternal diabetes exacerbates dietary sodium intake-induced endothelial dysfunction by activating cyclooxygenase 2-derived prostanoids. Am J Physiol Endocrinol Metab 2024; 326:E555-E566. [PMID: 38446637 DOI: 10.1152/ajpendo.00009.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/04/2024] [Accepted: 03/05/2024] [Indexed: 03/08/2024]
Abstract
Prenatal exposure to maternal diabetes has been recognized as a significant cardiovascular risk factor, increasing the susceptibility to the emergence of conditions such as high blood pressure, atherosclerosis, and heart disease in later stages of life. However, it is unclear if offspring exposed to diabetes in utero have worse vascular outcomes on a high-salt (HS) diet. To test the hypothesis that in utero exposure to maternal diabetes predisposes to HS-induced vascular dysfunction, we treated adult male wild-type offspring (DM_Exp, 6 mo old) of diabetic Ins2+/C96Y mice (Akita mice) with HS (8% sodium chloride, 10 days) and analyzed endothelial function via wire myograph and cyclooxygenase (COX)-derived prostanoids pathway by ELISA, quantitative PCR, and immunochemistry. On a regular diet, DM_Exp mice did not manifest any vascular dysfunction, remodeling, or inflammation. However, HS increased aortic contractility to phenylephrine and induced endothelial dysfunction (analyzed by acetylcholine-induced endothelium-dependent relaxation), vascular hydrogen peroxide production, COX2 expression, and prostaglandin E2 (PGE2) overproduction. Interestingly, ex vivo antioxidant treatment (tempol) or COX1/2 (indomethacin) or COX2 (NS398) inhibitors improved or reverted the endothelial dysfunction in DM_Exp mice fed a HS diet. Finally, DM_Exp mice fed with HS exhibited greater circulating cytokines and chemokines accompanied by vascular inflammation. In summary, our findings indicate that prenatal exposure to maternal diabetes predisposes to HS-induced vascular dysfunction, primarily through the induction of oxidative stress and the generation of COX2-derived PGE2. This supports the concept that in utero exposure to maternal diabetes is a cardiovascular risk factor in adulthood.NEW & NOTEWORTHY Using a unique mouse model of prenatal exposure to maternal type 1 diabetes, our study demonstrates the novel observation that prenatal exposure to maternal diabetes results in a predisposition to high-salt (HS) dietary-induced vascular dysfunction and inflammation in adulthood. Mechanistically, we demonstrated that in utero exposure to maternal diabetes and HS intake induces vascular oxidative stress, cyclooxygenase-derived prostaglandin E2, and inflammation.
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Affiliation(s)
- Rafael M Costa
- Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Center for Pediatrics Research in Obesity and Metabolism, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Endocrinology Division, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Institute of Health Sciences, Federal University of Jatai, Jatai, Goiás, Brazil
| | - Débora Malta Cerqueira
- Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Nephrology Division, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Lydia Francis
- Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Nephrology Division, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Ariane Bruder-Nascimento
- Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Center for Pediatrics Research in Obesity and Metabolism, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Endocrinology Division, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Institute of Health Sciences, Federal University of Jatai, Jatai, Goiás, Brazil
| | - Juliano V Alves
- Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Center for Pediatrics Research in Obesity and Metabolism, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Endocrinology Division, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Institute of Health Sciences, Federal University of Jatai, Jatai, Goiás, Brazil
| | - Sunder Sims-Lucas
- Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Nephrology Division, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Jacqueline Ho
- Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Nephrology Division, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Thiago Bruder-Nascimento
- Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Center for Pediatrics Research in Obesity and Metabolism, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Endocrinology Division, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
- Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
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2
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Thowsen IM, Reikvam T, Skogstrand T, Samuelsson AM, Müller DN, Tenstad O, Alitalo K, Karlsen T, Wiig H. Genetic Engineering of Lymphangiogenesis in Skin Does Not Affect Blood Pressure in Mouse Models of Salt-Sensitive Hypertension. Hypertension 2022; 79:2451-2462. [DOI: 10.1161/hypertensionaha.122.19777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Background:
Recent studies have indicated that sodium storage is influenced by macrophages that secrete VEGF-C (vascular endothelial growth factor) during salt stress thus stimulating lymphangiogenesis, thereby acting as a buffer against increased blood pressure (BP). We aimed to explore the role of dermal lymphatics in BP and sodium homeostasis. Our hypothesis was that mice with reduced dermal lymphatic vessels were more prone to develop salt-sensitive hypertension, and that mice with hyperplastic vessels were protected.
Methods:
Mice with either hypoplastic (Chy), absent (K14-VEGFR3 [vascular endothelial growth factor receptor 3]-Ig), or hyperplastic (K14-VEGF-C) dermal lymphatic vessels and littermate controls were given high-salt diet (4% NaCl in the chow), deoxycorticosterone acetate (DOCA)-salt diet and 1% saline to drink or nitric oxide blocker diet L-N
G
-nitro arginine methyl ester (followed by high salt diet). BP was measured by telemetric recording, and tissue sodium content by ion chromatography.
Results:
In contrast to previous studies, high salt diet did not induce an increase in BP or sodium storage in any of the mouse strains investigated. DOCA-salt, on the other hand, gave an increase in BP in Chy and K14-VEGFR3-Ig not different from their corresponding WT controls. DOCA induced salt storage in skin and muscle, but to the same extent in mice with dysfunctional lymphatic vessels and WT controls. Lymph flow as assessed by tracer washout was not affected by the diet in any of the mouse strains.
Conclusions:
Our results suggest that dermal lymphatic vessels are not involved in salt storage or blood pressure regulation in these mouse models of salt-sensitive hypertension.
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Affiliation(s)
- Irene Matre Thowsen
- Department of Biomedicine, University of Bergen, Norway (I.M.T., T.R., T.S., A.-M.S., O.T., T.K., H.W.)
| | - Tore Reikvam
- Department of Biomedicine, University of Bergen, Norway (I.M.T., T.R., T.S., A.-M.S., O.T., T.K., H.W.)
| | - Trude Skogstrand
- Department of Biomedicine, University of Bergen, Norway (I.M.T., T.R., T.S., A.-M.S., O.T., T.K., H.W.)
| | - Anne-Maj Samuelsson
- Department of Biomedicine, University of Bergen, Norway (I.M.T., T.R., T.S., A.-M.S., O.T., T.K., H.W.)
- Department of Medicine, Haukeland University Hospital, Bergen, Norway (A.-M.S.)
| | - Dominik N. Müller
- Experimental and Clinical Research Center, a cooperation of Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany (D.N.M.)
| | - Olav Tenstad
- Department of Biomedicine, University of Bergen, Norway (I.M.T., T.R., T.S., A.-M.S., O.T., T.K., H.W.)
| | - Kari Alitalo
- Wihuri Research Institute and Translational Cancer Medicine Program, Biomedicum Helsinki, University of Helsinki, Finland (K.A.)
| | - Tine Karlsen
- Department of Biomedicine, University of Bergen, Norway (I.M.T., T.R., T.S., A.-M.S., O.T., T.K., H.W.)
| | - Helge Wiig
- Department of Biomedicine, University of Bergen, Norway (I.M.T., T.R., T.S., A.-M.S., O.T., T.K., H.W.)
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Clozel M. Aprocitentan and the endothelin system in resistant hypertension. Can J Physiol Pharmacol 2022; 100:573-583. [PMID: 35245103 DOI: 10.1139/cjpp-2022-0010] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Endothelin has emerged as a target for therapeutic intervention in systemic hypertension. As a vasoconstrictor, co-mitogenic agent, linking pulse pressure and vascular remodeling, and mediator of aldosterone and catecholamine release, endothelin is a key player in hypertension and end-organ damage. In 10-20% of the hypertensive population, the high blood pressure is resistant to administration of antihypertensive drugs of different classes in combination. Because endothelin is not targeted by the current antihypertensive drugs this may suggest that this resistance is due, in part at least, to a dependence on endothelin. This hypothesis is supported by the observation that this form of hypertension is often salt-sensitive, and that the endothelin system is stimulated by salt. In addition, the endothelin system is activated in subjects at risk of developing resistant hypertension, such as African-Americans or patients with obesity or obstructive sleep apnea. Aprocitentan is a novel, potent, dual endothelin receptor antagonist (ERA) currently in phase 3 development for the treatment of difficult-to-treat hypertension. This article discusses the research which underpinned the discovery of this ERA and the choice of its first clinical indication for patients with forms of hypertension which cannot be well controlled with classical antihypertensive drugs.
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Affiliation(s)
- Martine Clozel
- Idorsia Pharmaceuticals Ltd, 510456, Allschwil, Basel-Landschaft, Switzerland;
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4
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Gohar EY, De Miguel C, Obi IE, Daugherty EM, Hyndman KA, Becker BK, Jin C, Sedaka R, Johnston JG, Liu P, Speed JS, Mitchell T, Kriegel AJ, Pollock JS, Pollock DM. Acclimation to a High-Salt Diet Is Sex Dependent. J Am Heart Assoc 2022; 11:e020450. [PMID: 35191321 PMCID: PMC9075092 DOI: 10.1161/jaha.120.020450] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 08/03/2021] [Indexed: 01/01/2023]
Abstract
Background Premenopausal women are less likely to develop hypertension and salt-related complications than are men, yet the impact of sex on mechanisms regulating Na+ homeostasis during dietary salt challenges is poorly defined. Here, we determined whether female rats have a more efficient capacity to acclimate to increased dietary salt intake challenge. Methods and Results Age-matched male and female Sprague Dawley rats maintained on a normal-salt (NS) diet (0.49% NaCl) were challenged with a 5-day high-salt diet (4.0% NaCl). We assessed serum, urinary, skin, and muscle electrolytes; total body water; and kidney Na+ transporters during the NS and high-salt diet phases. During the 5-day high-salt challenge, natriuresis increased more rapidly in females, whereas serum Na+ and body water concentration increased only in males. To determine if females are primed to handle changes in dietary salt, we asked the question whether the renal endothelin-1 natriuretic system is more active in female rats, compared with males. During the NS diet, female rats had a higher urinary endothelin-1 excretion rate than males. Moreover, Ingenuity Pathway Analysis of RNA sequencing data identified the enrichment of endothelin signaling pathway transcripts in the inner medulla of kidneys from NS-fed female rats compared with male counterparts. Notably, in human subjects who consumed an Na+-controlled diet (3314-3668 mg/day) for 3 days, women had a higher urinary endothelin-1 excretion rate than men, consistent with our findings in NS-fed rats. Conclusions These results suggest that female sex confers a greater ability to maintain Na+ homeostasis during acclimation to dietary Na+ challenges and indicate that the intrarenal endothelin-1 natriuretic pathway is enhanced in women.
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Affiliation(s)
- Eman Y. Gohar
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
- Present address:
Division of Nephrology and HypertensionVanderbilt University Medical CenterNashvilleTN
| | - Carmen De Miguel
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - Ijeoma E. Obi
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - Elizabeth M. Daugherty
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - Kelly A. Hyndman
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - Bryan K. Becker
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - Chunhua Jin
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - Randee Sedaka
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - Jermaine G. Johnston
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - Pengyuan Liu
- Department of PhysiologyMedical College of WisconsinMilwaukeeWI
| | - Joshua S. Speed
- Department of PhysiologyUniversity of Mississippi Medical CenterJacksonMS
| | | | | | - Jennifer S. Pollock
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - David M. Pollock
- Section of Cardio‐Renal Physiology & MedicineDivision of NephrologyDepartment of MedicineUniversity of Alabama at BirminghamAL
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5
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Ertuglu LA, Elijovich F, Laffer CL, Kirabo A. Salt-Sensitivity of Blood Pressure and Insulin Resistance. Front Physiol 2021; 12:793924. [PMID: 34966295 PMCID: PMC8711096 DOI: 10.3389/fphys.2021.793924] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 11/18/2021] [Indexed: 12/20/2022] Open
Abstract
Salt sensitivity of blood pressure (SSBP) is an independent risk factor for cardiovascular morbidity and mortality that is seen in both hypertensive and normotensive populations. Insulin resistance (IR) strongly correlates with SSBP and affects nearly 50% of salt sensitive people. While the precise mechanism by which IR and SSBP relate remains elusive, several common pathways are involved in the genesis of both processes, including vascular dysfunction and immune activation. Vascular dysfunction associated with insulin resistance is characterized by loss of nitric oxide (NO)-mediated vasodilation and heightened endothelin-1 induced vasoconstriction, as well as capillary rarefaction. It manifests with increased blood pressure (BP) in salt sensitive murine models. Another common denominator in the pathogenesis of insulin resistance, hypertension, and salt sensitivity (SS) is immune activation involving pro-inflammatory cytokines like tumor necrosis factor (TNF)-α, IL-1β, and IL-6. In the last decade, a new understanding of interstitial sodium storage in tissues such as skin and muscle has revolutionized traditional concepts of body sodium handling and pathogenesis of SS. We have shown that interstitial Na+ can trigger a T cell mediated inflammatory response through formation of isolevuglandin protein adducts in antigen presenting cells (APCs), and that this response is implicated in salt sensitive hypertension. The peroxisome proliferator-activated receptor γ (PPARγ) is a transcription factor that modulates both insulin sensitivity and BP. PPARγ agonists increase insulin sensitivity and ameliorate salt sensitivity, whereas deficiency of PPARγ results in severe insulin resistance and hypertension. These findings suggest that PPARγ plays a role in the common pathogenesis of insulin sensitivity and salt sensitivity, perhaps via effects on the immune system and vascular function. The goal of this review is to discuss those mechanisms that may play a role in both SSBP and in insulin resistance.
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Affiliation(s)
- Lale A Ertuglu
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Fernando Elijovich
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Cheryl L Laffer
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Annet Kirabo
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
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6
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The Causal Relationship between Endothelin-1 and Hypertension: Focusing on Endothelial Dysfunction, Arterial Stiffness, Vascular Remodeling, and Blood Pressure Regulation. Life (Basel) 2021; 11:life11090986. [PMID: 34575135 PMCID: PMC8472034 DOI: 10.3390/life11090986] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/13/2021] [Accepted: 09/17/2021] [Indexed: 12/01/2022] Open
Abstract
Hypertension (HTN) is one of the most prevalent diseases worldwide and is among the most important risk factors for cardiovascular and cerebrovascular complications. It is currently thought to be the result of disturbances in a number of neural, renal, hormonal, and vascular mechanisms regulating blood pressure (BP), so crucial importance is given to the imbalance of a number of vasoactive factors produced by the endothelium. Decreased nitric oxide production and increased production of endothelin-1 (ET-1) in the vascular wall may promote oxidative stress and low-grade inflammation, with the development of endothelial dysfunction (ED) and increased vasoconstrictor activity. Increased ET-1 production can contribute to arterial aging and the development of atherosclerotic changes, which are associated with increased arterial stiffness and manifestation of isolated systolic HTN. In addition, ET-1 is involved in the complex regulation of BP through synergistic interactions with angiotensin II, regulates the production of catecholamines and sympathetic activity, affects renal hemodynamics and water–salt balance, and regulates baroreceptor activity and myocardial contractility. This review focuses on the relationship between ET-1 and HTN and in particular on the key role of ET-1 in the pathogenesis of ED, arterial structural changes, and impaired vascular regulation of BP. The information presented includes basic concepts on the role of ET-1 in the pathogenesis of HTN without going into detailed analyses, which allows it to be used by a wide range of specialists. Also, the main pathological processes and mechanisms are richly illustrated for better understanding.
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7
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Jenkins HN, Rivera-Gonzalez O, Gibert Y, Speed JS. Endothelin-1 in the pathophysiology of obesity and insulin resistance. Obes Rev 2020; 21:e13086. [PMID: 32627269 PMCID: PMC7669671 DOI: 10.1111/obr.13086] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/07/2020] [Accepted: 05/23/2020] [Indexed: 12/29/2022]
Abstract
The association between plasma endothelin-1 (ET-1) and obesity has been documented for decades, yet the contribution of ET-1 to risk factors associated with obesity is not fully understood. In 1994, one of first papers to document this association also noted a positive correlation between plasma insulin and ET-1, suggesting a potential contribution of ET-1 to the development of insulin resistance. Both endogenous receptors for ET-1, ETA and ETB are present in all insulin-sensitive tissues including adipose, liver and muscle, and ET-1 actions within these tissues suggest that ET-1 may be playing a role in the pathogenesis of insulin resistance. Further, antagonists for ET-1 receptors are clinically approved making these sites attractive therapeutic targets. This review focuses on known mechanisms through which ET-1 affects plasma lipid profiles and insulin signalling in these metabolically important tissues and also identifies gaps in our understanding of ET-1 in obesity-related pathophysiology.
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Affiliation(s)
- Haley N Jenkins
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Osvaldo Rivera-Gonzalez
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Yann Gibert
- Department of Cell and Molecular Biology, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Joshua S Speed
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi, USA
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8
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Rivera-Gonzalez OJ, Kasztan M, Johnston JG, Hyndman KA, Speed JS. Loss of endothelin type B receptor function improves insulin sensitivity in rats. Can J Physiol Pharmacol 2020; 98:604-610. [PMID: 32083942 PMCID: PMC7442597 DOI: 10.1139/cjpp-2019-0666] [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: 01/01/2023]
Abstract
High salt intake (HS) is associated with obesity and insulin resistance. ET-1, a peptide released in response to HS, inhibits the actions of insulin on cultured adipocytes through ET-1 type B (ETB) receptors; however, the in vivo implications of ETB receptor activation on lipid metabolism and insulin resistance is unknown. We hypothesized that activation of ETB receptors in response to HS intake promotes dyslipidemia and insulin resistance. In normal salt (NS) fed rats, no significant difference in body mass or epididymal fat mass was observed between control and ETB deficient rats. After 2 weeks of HS, ETB-deficient rats had significantly lower body mass and epididymal fat mass compared to controls. Nonfasting plasma glucose was not different between genotypes; however, plasma insulin concentration was significantly lower in ETB-deficient rats compared to controls, suggesting improved insulin sensitivity. In addition, ETB-deficient rats had higher circulating free fatty acids in both NS and HS groups, with no difference in plasma triglycerides between genotypes. In a separate experiment, ETB-deficient rats had significantly lower fasting blood glucose and improved glucose and insulin tolerance compared to controls. These data suggest that ET-1 promotes adipose deposition and insulin resistance via the ETB receptor.
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Affiliation(s)
- Osvaldo J Rivera-Gonzalez
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Malgorzata Kasztan
- Cardio-Renal Physiology and Medicine, Department of Medicine, Division of Nephrology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Jermaine G Johnston
- Cardio-Renal Physiology and Medicine, Department of Medicine, Division of Nephrology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Kelly A Hyndman
- Cardio-Renal Physiology and Medicine, Department of Medicine, Division of Nephrology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Joshua S Speed
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, USA
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9
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Jenkins HN, Williams LJ, Dungey A, Vick KD, Grayson BE, Speed JS. Elevated plasma endothelin-1 is associated with reduced weight loss post vertical sleeve gastrectomy. Surg Obes Relat Dis 2019; 15:1044-1050. [PMID: 31147283 DOI: 10.1016/j.soard.2019.03.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/19/2019] [Accepted: 03/28/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Obesity and insulin resistance are positively correlated with plasma endothelin-1 (ET-1) levels; however, the mechanisms leading to increased ET-1 are not understood. Similarly, the full physiological complexity of ET-1 has yet to be described, especially in obesity. To date, one of the best treatments available for morbid obesity is bariatric surgery to quickly reduce body fat and the factors associated with obesity-related disease; however, the effects of vertical sleeve gastrectomy (SG) on plasma ET-1 have not been described. OBJECTIVES To determine if SG will reduce plasma ET-1 levels and to determine if plasma ET-1 concentration is associated with weight loss after surgery. SETTING The studies were undertaken at a University Hospital. METHODS This was tested by measuring plasma ET-1 levels from 12 obese patients before and after SG. All data were collected from clinic visits before SG, 6 weeks after SG, and 6 months after surgery. RESULTS At 6 weeks after SG, plasma ET-1 levels increased by 24%; however, after 6 months, there was a 27% decrease compared with presurgery. Average weight loss in this cohort was 11.3% ± 2.4% body weight after 6 weeks and 21.4% ± 5.7% body weight after 6 months. Interestingly, we observed an inverse relationship between baseline plasma ET-1 and percent body weight loss (R2 = .49, P = .01) and change in body mass index 6 months (R2 = .45, P = .011) post bariatric surgery. CONCLUSIONS Our results indicate that SG reduces plasma ET-1 levels, a possible mechanism for improved metabolic risk in these patients. These data also suggest that ET-1 may serve as a predictor of weight loss after bariatric surgery.
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Affiliation(s)
- Haley N Jenkins
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - London J Williams
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Adam Dungey
- Department of Surgery, University of Mississippi Medical Center, Jackson, Mississippi
| | - Kenneth D Vick
- Department of Surgery, University of Mississippi Medical Center, Jackson, Mississippi
| | - Bernadette E Grayson
- Department of Neurobiology and Anatomical Sciences, University of Mississippi Medical Center, Jackson, Mississippi
| | - Joshua S Speed
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi.
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10
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Lakshmipathi J, Wheatley W, Kumar A, Mercenne G, Rodan AR, Kohan DE. Identification of NFAT5 as a transcriptional regulator of the EDN1 gene in collecting duct. Am J Physiol Renal Physiol 2019; 316:F481-F487. [PMID: 30623723 DOI: 10.1152/ajprenal.00509.2018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The inner medullary collecting duct (IMCD) produces very high levels of endothelin-1 (ET-1) that acts as an autocrine inhibitor of IMCD Na+ and water reabsorption. Recent studies suggest that IMCD ET-1 production is enhanced by extracellular hypertonicity as can occur during high salt intake. Although NFAT5 has been implicated in the IMCD ET-1 hypertonicity response, no studies in any cell type have identified NFAT5 as a transcriptional regulator of the EDN1 gene; the current study examined this using a mouse IMCD cell line (IMCD3). Media hypertonicity increased IMCD3 ET-1 mRNA in a dose- and time-dependent manner associated with increased NFAT5 nuclear localization. Knockdown of NFAT5 using small-interfering RNA or by CRISPR/Cas9-mediated targeting of exon 4 of the NFAT5 gene reduced the ET-1 hypertonicity response. Chromatin immunoprecipitation using an NFAT5 antibody pulled down ET-1 promoter regions containing NFAT5 consensus binding sequences. Transfected ET-1 promoter reporter constructs revealed maximal hypertonicity-induced reporter activity in the proximal 1-kb region; mutation of the two NFAT5 consensus-binding sites in this region abolished hypertonicity-induced reporter activity. The 1-kb ET-1 promoter-reporter construct lost hypertonicity responsiveness when transfected in CRISPR/Cas9-induced NFAT5-deficient cells. In summary, these findings represent the first description that NFAT5 is a direct transcriptional regulator of the EDN1 gene in IMCD cells and point to a potentially important mechanism by which body Na+ homeostasis is maintained.
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Affiliation(s)
| | - Will Wheatley
- Division of Nephrology, University of Utah Health Sciences Center , Salt Lake City, Utah
| | - Anil Kumar
- Metabolic Phenotyping Core, University of Utah Health Sciences Center , Salt Lake City, Utah
| | - Gaelle Mercenne
- Division of Nephrology, University of Utah Health Sciences Center , Salt Lake City, Utah.,Molecular Medicine Program, University of Utah Health Sciences Center , Salt Lake City, Utah
| | - Aylin R Rodan
- Division of Nephrology, University of Utah Health Sciences Center , Salt Lake City, Utah.,Molecular Medicine Program, University of Utah Health Sciences Center , Salt Lake City, Utah.,Salt Lake City Veterans Affairs Medical Center , Salt Lake City, Utah
| | - Donald E Kohan
- Division of Nephrology, University of Utah Health Sciences Center , Salt Lake City, Utah.,Salt Lake City Veterans Affairs Medical Center , Salt Lake City, Utah
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Qian Q. Salt, water and nephron: Mechanisms of action and link to hypertension and chronic kidney disease. Nephrology (Carlton) 2018; 23 Suppl 4:44-49. [PMID: 30298656 PMCID: PMC6221012 DOI: 10.1111/nep.13465] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2018] [Indexed: 12/27/2022]
Abstract
Our knowledge on sodium and water homeostasis and regulation continues to evolve. A considerable amount of new information in this area has emerged in recent years. This review summarizes existing and new literature and discusses complex multi-organ effects of high-salt and low-water intake and role of arginine vasopressin in this process, as well as the potential clinical significance of non-osmotic sodium storage pool and rhythmicity of urine sodium excretion. It has become clear that sodium and water dysregulation can exert profound effects on kidney and vascular health, far greater than previously recognized. Maladaptation to a combined high-salt and low-water intake can be linked to the growing epidemic of hypertension and chronic kidney disease.
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Affiliation(s)
- Qi Qian
- Division of Nephrology and Hypertension, Department of Medicine, Mayo ClinicCollege of MedicineRochesterUSA
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12
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Kittikulsuth W, Hyndman KA, Pollock JS, Pollock DM. Natriuretic response to renal medullary endothelin B receptor activation is impaired in Dahl-salt sensitive rats on a high-fat diet. Physiol Res 2018; 67:S149-S154. [PMID: 29947535 DOI: 10.33549/physiolres.933858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Renal medullary endothelin B receptors (ET(B)) mediate sodium excretion and blood pressure (BP) control. Several animal models of hypertension have impaired renal medullary ET(B) function. We found that 4-week high-caloric diet elevated systolic BP in Dahl salt-sensitive (Dahl S) rats (126+/-2 vs. 143+/-3 mm Hg, p<0.05). We hypothesized that renal medullary ET(B) function is dysfunctional in DS rats fed a high-caloric diet. We compared the diuretic and natriuretic response to intramedullary infusion of ET(B) agonist sarafotoxin 6c (S6c) in DS rats fed either a normal or high-caloric diet for 4 weeks. Urine was collected during intramedullary infusion of saline for baseline collection followed by intramedullary infusion of either saline or S6c. We first examined the ET(B) function in DS rats fed a normal diet. S6c increased urine flow (2.7+/-0.3 microl/min during baseline vs. 5.1+/-0.6 microl/min after S6c; p<0.05; n=5) and sodium excretion (0.28+/-0.05 vs. 0.81+/-0.17 micromol/min; p<0.05), suggesting that DS rats have renal medullary ET(B) function. However, DS rats fed a high-caloric diet displayed a significant increase in urine flow (2.7+/-0.4 vs. 4.2+/-0.4 microl/min, baseline vs. S6c infusion, respectively; p<0.05, n=6), but no significant change in sodium excretion in response to S6c (0.32+/-0.06 vs. 0.45+/-0.10 micromol/min). These data demonstrate that renal medullary ET(B) function is impaired in DS rats fed a high-caloric diet, which may be contributed to the elevation of blood pressure during high-caloric feeding in this model.
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Affiliation(s)
- W Kittikulsuth
- Section of Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
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13
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Gumz ML. Clocking skin sodium. Am J Physiol Regul Integr Comp Physiol 2018; 314:R542-R543. [DOI: 10.1152/ajpregu.00453.2017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Michelle L. Gumz
- Department of Medicine, Division of Nephrology, Hypertension, and Renal Transplantation, University of Florida, Gainesville, Florida
- Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida
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14
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Fox BM, Becker BK, Loria AS, Hyndman KA, Jin C, Clark H, Johns R, Yanagisawa M, Pollock DM, Pollock JS. Acute Pressor Response to Psychosocial Stress Is Dependent on Endothelium-Derived Endothelin-1. J Am Heart Assoc 2018; 7:JAHA.117.007863. [PMID: 29453306 PMCID: PMC5850198 DOI: 10.1161/jaha.117.007863] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Background Acute psychosocial stress provokes increases in circulating endothelin‐1 (ET‐1) levels in humans and animal models. However, key questions about the physiological function and cellular source of stress‐induced ET‐1 remain unanswered. We hypothesized that endothelium‐derived ET‐1 contributes to the acute pressor response to stress via activation of the endothelin A receptor. Methods and Results Adult male vascular endothelium‐specific ET‐1 knockout mice and control mice that were homozygous for the floxed allele were exposed to acute psychosocial stress in the form of cage switch stress (CSS), with blood pressure measured by telemetry. An acute pressor response was elicited by CSS in both genotypes; however, this response was significantly blunted in vascular endothelium‐specific ET‐1 knockout mice compared with control mice that were homozygous for the floxed allele. In mice pretreated for 3 days with the endothelin A antagonist, ABT‐627, or the dual endothelin A/B receptor antagonist, A‐182086, the pressor response to CSS was similar between genotypes. CSS significantly increased plasma ET‐1 levels in control mice that were homozygous for the floxed allele. CSS failed to elicit an increase in plasma ET‐1 in vascular endothelium‐specific ET‐1 knockout mice. Telemetry frequency domain analyses suggested similar autonomic responses to stress between genotypes, and isolated resistance arteries demonstrated similar sensitivity to α1‐adrenergic receptor‐mediated vasoconstriction. Conclusions These findings specify that acute stress‐induced activation of endothelium‐derived ET‐1 and subsequent endothelin A receptor activation is a novel mediator of the blood pressure response to acute psychosocial stress.
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Affiliation(s)
- Brandon M Fox
- Cardio-Renal Physiology and Medicine Section, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, AL
| | - Bryan K Becker
- Cardio-Renal Physiology and Medicine Section, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, AL
| | - Analia S Loria
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY
| | - Kelly A Hyndman
- Cardio-Renal Physiology and Medicine Section, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, AL
| | - Chunhua Jin
- Cardio-Renal Physiology and Medicine Section, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, AL
| | | | - Robin Johns
- College of Nursing, Augusta University, Augusta, GA
| | - Masashi Yanagisawa
- International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Japan
| | - David M Pollock
- Cardio-Renal Physiology and Medicine Section, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, AL.,Medical College of Georgia, Augusta University, Augusta, GA
| | - Jennifer S Pollock
- Cardio-Renal Physiology and Medicine Section, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, AL .,Medical College of Georgia, Augusta University, Augusta, GA
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15
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Pandey AK, Singhi EK, Arroyo JP, Ikizler TA, Gould ER, Brown J, Beckman JA, Harrison DG, Moslehi J. Mechanisms of VEGF (Vascular Endothelial Growth Factor) Inhibitor-Associated Hypertension and Vascular Disease. Hypertension 2017; 71:e1-e8. [PMID: 29279311 DOI: 10.1161/hypertensionaha.117.10271] [Citation(s) in RCA: 177] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Arvind K Pandey
- From the Division of Cardiovascular Medicine (A.K.P., E.K.S., J.B., J.A.B., J.M.), Division of Nephrology (J.P.A., T.A.I., E.R.G.), Vanderbilt Center for Kidney Disease (T.A.I.), Division of Clinical Pharmacology (D.G.H.) and Cardio-Oncology Program (J.M.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Eric K Singhi
- From the Division of Cardiovascular Medicine (A.K.P., E.K.S., J.B., J.A.B., J.M.), Division of Nephrology (J.P.A., T.A.I., E.R.G.), Vanderbilt Center for Kidney Disease (T.A.I.), Division of Clinical Pharmacology (D.G.H.) and Cardio-Oncology Program (J.M.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Juan Pablo Arroyo
- From the Division of Cardiovascular Medicine (A.K.P., E.K.S., J.B., J.A.B., J.M.), Division of Nephrology (J.P.A., T.A.I., E.R.G.), Vanderbilt Center for Kidney Disease (T.A.I.), Division of Clinical Pharmacology (D.G.H.) and Cardio-Oncology Program (J.M.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Talat Alp Ikizler
- From the Division of Cardiovascular Medicine (A.K.P., E.K.S., J.B., J.A.B., J.M.), Division of Nephrology (J.P.A., T.A.I., E.R.G.), Vanderbilt Center for Kidney Disease (T.A.I.), Division of Clinical Pharmacology (D.G.H.) and Cardio-Oncology Program (J.M.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Edward R Gould
- From the Division of Cardiovascular Medicine (A.K.P., E.K.S., J.B., J.A.B., J.M.), Division of Nephrology (J.P.A., T.A.I., E.R.G.), Vanderbilt Center for Kidney Disease (T.A.I.), Division of Clinical Pharmacology (D.G.H.) and Cardio-Oncology Program (J.M.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Jonathan Brown
- From the Division of Cardiovascular Medicine (A.K.P., E.K.S., J.B., J.A.B., J.M.), Division of Nephrology (J.P.A., T.A.I., E.R.G.), Vanderbilt Center for Kidney Disease (T.A.I.), Division of Clinical Pharmacology (D.G.H.) and Cardio-Oncology Program (J.M.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Joshua A Beckman
- From the Division of Cardiovascular Medicine (A.K.P., E.K.S., J.B., J.A.B., J.M.), Division of Nephrology (J.P.A., T.A.I., E.R.G.), Vanderbilt Center for Kidney Disease (T.A.I.), Division of Clinical Pharmacology (D.G.H.) and Cardio-Oncology Program (J.M.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - David G Harrison
- From the Division of Cardiovascular Medicine (A.K.P., E.K.S., J.B., J.A.B., J.M.), Division of Nephrology (J.P.A., T.A.I., E.R.G.), Vanderbilt Center for Kidney Disease (T.A.I.), Division of Clinical Pharmacology (D.G.H.) and Cardio-Oncology Program (J.M.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Javid Moslehi
- From the Division of Cardiovascular Medicine (A.K.P., E.K.S., J.B., J.A.B., J.M.), Division of Nephrology (J.P.A., T.A.I., E.R.G.), Vanderbilt Center for Kidney Disease (T.A.I.), Division of Clinical Pharmacology (D.G.H.) and Cardio-Oncology Program (J.M.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN.
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16
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Speed JS, Hyndman KA, Kasztan M, Johnston JG, Roth KJ, Titze JM, Pollock DM. Diurnal pattern in skin Na + and water content is associated with salt-sensitive hypertension in ET B receptor-deficient rats. Am J Physiol Regul Integr Comp Physiol 2017; 314:R544-R551. [PMID: 29351432 DOI: 10.1152/ajpregu.00312.2017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Impairment in the ability of the skin to properly store Na+ nonosmotically (without water) has recently been hypothesized as contributing to salt-sensitive hypertension. Our laboratory has shown that endothelial production of endothelin-1 (ET-1) is crucial to skin Na+ handling. Furthermore, it is well established that loss of endothelin type B receptor (ETB) receptor function impairs Na+ excretion by the kidney. Thus we hypothesized that rats lacking functional ETB receptors (ETB-def) will have a reduced capacity of the skin to store Na+ during chronic high-salt (HS) intake. We observed that ETB-def rats exhibited salt-sensitive hypertension with an approximate doubling in the diurnal amplitude of mean arterial pressure compared with genetic control rats on a HS diet. Two weeks of HS diet significantly increased skin Na+ content relative to water; however, there was no significant difference between control and ETB-def rats. Interestingly, HS intake led to a 19% increase in skin Na+ and 16% increase in water content (relative to dry wt.) during the active phase (zeitgeber time 16) versus inactive phase (zeitgeber time 4, P < 0.05) in ETB-def rats. There was no significant circadian variation in total skin Na+ or water content of control rats fed normal or HS. These data indicate that ETB receptors have little influence on the ability to store Na+ nonosmotically in the skin during long-term HS intake but, rather, appear to regulate diurnal rhythms in skin Na+ content and circadian blood pressure rhythms associated with a HS diet.
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Affiliation(s)
- Joshua S Speed
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Kelly A Hyndman
- Cardio-Renal Physiology and Medicine, Department of Medicine, Division of Nephrology, University of Alabama at Birmingham , Birmingham, Alabama
| | - Malgorzata Kasztan
- Cardio-Renal Physiology and Medicine, Department of Medicine, Division of Nephrology, University of Alabama at Birmingham , Birmingham, Alabama
| | - Jermaine G Johnston
- Cardio-Renal Physiology and Medicine, Department of Medicine, Division of Nephrology, University of Alabama at Birmingham , Birmingham, Alabama
| | - Kaehler J Roth
- Cardio-Renal Physiology and Medicine, Department of Medicine, Division of Nephrology, University of Alabama at Birmingham , Birmingham, Alabama
| | - Jens M Titze
- Cardiovasular and Metabolic Disorders, National University of Singapore Medical School, Singapore
| | - David M Pollock
- Cardio-Renal Physiology and Medicine, Department of Medicine, Division of Nephrology, University of Alabama at Birmingham , Birmingham, Alabama
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17
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Lankhorst S, Severs D, Markó L, Rakova N, Titze J, Müller DN, Danser AHJ, van den Meiracker AH. Salt Sensitivity of Angiogenesis Inhibition-Induced Blood Pressure Rise: Role of Interstitial Sodium Accumulation? Hypertension 2017; 69:919-926. [PMID: 28320855 DOI: 10.1161/hypertensionaha.116.08565] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 10/31/2016] [Accepted: 12/27/2016] [Indexed: 01/22/2023]
Abstract
In response to salt loading, Na+ and Cl- accumulate in the skin in excess of water, stimulating skin lymphangiogenesis via activation of the mononuclear phagocyte system cell-derived vascular endothelial growth factor-C-vascular endothelial growth factor type 3 receptor signaling pathway. Inhibition of this pathway results in salt-sensitive hypertension. Sunitinib is an antiangiogenic, anticancer agent that blocks all 3 vascular endothelial growth factor receptors and increases blood pressure. We explored the salt dependency of sunitinib-induced hypertension and whether impairment of skin lymphangiogenesis is an underlying mechanism. Normotensive Wistar-Kyoto rats were exposed to a normal or high salt with or without sunitinib administration. Sunitinib induced a 15 mm Hg rise in telemetrically measured blood pressure, which was aggravated by a high-salt diet (HSD), resulting in a decline of the slope of the pressure-natriuresis curve. Without affecting body weight, plasma Na+ concentration or renal function, Na+ and Cl- skin content increased by 31% and 32% with the high salt and by 49% and 50% with the HSD plus sunitinib, whereas skin water increased by 17% and 24%, respectively. Skin mononuclear phagocyte system cell density increased both during sunitinib and a HSD, but no further increment was seen when HSD and sunitinib were combined. HSD increased skin lymphangiogenesis, while sunitinib tended to decrease lymphangiogenesis, both during a normal-salt diet and HSD. We conclude that sunitinib induces hypertension that is aggravated by high salt intake and not accompanied by impaired skin lymphangiogenesis.
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Affiliation(s)
- Stephanie Lankhorst
- From the Division of Pharmacology and Vascular Medicine, Department of Internal Medicine (S.L., A.H.J.D., A.H.v.d.M.), Department of Nephrology & Transplantation (D.S.), Erasmus Medical Center, Rotterdam, The Netherlands; Experimental and Clinical Research Center, a Joint Cooperation of Max-Delbrück Center for Molecular Medicine and Charité University Medicine Berlin, Germany (L.M., N.R., D.N.M.); Department of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (J.T.); Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (D.N.M.); and Department of Nephrology and Hypertension, Friedrich-Alexander-University, Erlangen-Nürnberg, Germany (N.R.)
| | - David Severs
- From the Division of Pharmacology and Vascular Medicine, Department of Internal Medicine (S.L., A.H.J.D., A.H.v.d.M.), Department of Nephrology & Transplantation (D.S.), Erasmus Medical Center, Rotterdam, The Netherlands; Experimental and Clinical Research Center, a Joint Cooperation of Max-Delbrück Center for Molecular Medicine and Charité University Medicine Berlin, Germany (L.M., N.R., D.N.M.); Department of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (J.T.); Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (D.N.M.); and Department of Nephrology and Hypertension, Friedrich-Alexander-University, Erlangen-Nürnberg, Germany (N.R.)
| | - Lajos Markó
- From the Division of Pharmacology and Vascular Medicine, Department of Internal Medicine (S.L., A.H.J.D., A.H.v.d.M.), Department of Nephrology & Transplantation (D.S.), Erasmus Medical Center, Rotterdam, The Netherlands; Experimental and Clinical Research Center, a Joint Cooperation of Max-Delbrück Center for Molecular Medicine and Charité University Medicine Berlin, Germany (L.M., N.R., D.N.M.); Department of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (J.T.); Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (D.N.M.); and Department of Nephrology and Hypertension, Friedrich-Alexander-University, Erlangen-Nürnberg, Germany (N.R.)
| | - Natalia Rakova
- From the Division of Pharmacology and Vascular Medicine, Department of Internal Medicine (S.L., A.H.J.D., A.H.v.d.M.), Department of Nephrology & Transplantation (D.S.), Erasmus Medical Center, Rotterdam, The Netherlands; Experimental and Clinical Research Center, a Joint Cooperation of Max-Delbrück Center for Molecular Medicine and Charité University Medicine Berlin, Germany (L.M., N.R., D.N.M.); Department of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (J.T.); Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (D.N.M.); and Department of Nephrology and Hypertension, Friedrich-Alexander-University, Erlangen-Nürnberg, Germany (N.R.)
| | - Jens Titze
- From the Division of Pharmacology and Vascular Medicine, Department of Internal Medicine (S.L., A.H.J.D., A.H.v.d.M.), Department of Nephrology & Transplantation (D.S.), Erasmus Medical Center, Rotterdam, The Netherlands; Experimental and Clinical Research Center, a Joint Cooperation of Max-Delbrück Center for Molecular Medicine and Charité University Medicine Berlin, Germany (L.M., N.R., D.N.M.); Department of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (J.T.); Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (D.N.M.); and Department of Nephrology and Hypertension, Friedrich-Alexander-University, Erlangen-Nürnberg, Germany (N.R.)
| | - Dominik N Müller
- From the Division of Pharmacology and Vascular Medicine, Department of Internal Medicine (S.L., A.H.J.D., A.H.v.d.M.), Department of Nephrology & Transplantation (D.S.), Erasmus Medical Center, Rotterdam, The Netherlands; Experimental and Clinical Research Center, a Joint Cooperation of Max-Delbrück Center for Molecular Medicine and Charité University Medicine Berlin, Germany (L.M., N.R., D.N.M.); Department of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (J.T.); Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (D.N.M.); and Department of Nephrology and Hypertension, Friedrich-Alexander-University, Erlangen-Nürnberg, Germany (N.R.)
| | - A H Jan Danser
- From the Division of Pharmacology and Vascular Medicine, Department of Internal Medicine (S.L., A.H.J.D., A.H.v.d.M.), Department of Nephrology & Transplantation (D.S.), Erasmus Medical Center, Rotterdam, The Netherlands; Experimental and Clinical Research Center, a Joint Cooperation of Max-Delbrück Center for Molecular Medicine and Charité University Medicine Berlin, Germany (L.M., N.R., D.N.M.); Department of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (J.T.); Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (D.N.M.); and Department of Nephrology and Hypertension, Friedrich-Alexander-University, Erlangen-Nürnberg, Germany (N.R.)
| | - Anton H van den Meiracker
- From the Division of Pharmacology and Vascular Medicine, Department of Internal Medicine (S.L., A.H.J.D., A.H.v.d.M.), Department of Nephrology & Transplantation (D.S.), Erasmus Medical Center, Rotterdam, The Netherlands; Experimental and Clinical Research Center, a Joint Cooperation of Max-Delbrück Center for Molecular Medicine and Charité University Medicine Berlin, Germany (L.M., N.R., D.N.M.); Department of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, TN (J.T.); Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (D.N.M.); and Department of Nephrology and Hypertension, Friedrich-Alexander-University, Erlangen-Nürnberg, Germany (N.R.).
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Abouelkheir GR, Upchurch BD, Rutkowski JM. Lymphangiogenesis: fuel, smoke, or extinguisher of inflammation's fire? Exp Biol Med (Maywood) 2017; 242:884-895. [PMID: 28346012 DOI: 10.1177/1535370217697385] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Lymphangiogenesis is a recognized hallmark of inflammatory processes in tissues and organs as diverse as the skin, heart, bowel, and airways. In clinical and animal models wherein the signaling processes of lymphangiogenesis are manipulated, most studies demonstrate that an expanded lymphatic vasculature is necessary for the resolution of inflammation. The fundamental roles that lymphatics play in fluid clearance and immune cell trafficking from the periphery make these results seemingly obvious as a mechanism of alleviating locally inflamed environments: the lymphatics are simply providing a drain. Depending on the tissue site, lymphangiogenic mechanism, or induction timeframe, however, evidence shows that inflammation-associated lymphangiogenesis (IAL) may worsen the pathology. Recent studies have identified lymphatic endothelial cells themselves to be local regulators of immune cell activity and its consequential phenotypes - a more active role in inflammation regulation than previously thought. Indeed, results focusing on the immunocentric roles of peripheral lymphatic function have revealed that the basic drainage task of lymphatic vessels is a complex balance of locally processed and transported antigens as well as interstitial cytokine and immune cell signaling: an interplay that likely defines the function of IAL. This review will summarize the latest findings on how IAL impacts a series of disease states in various tissues in both preclinical models and clinical studies. This discussion will serve to highlight some emerging areas of lymphatic research in an attempt to answer the question relevant to an array of scientists and clinicians of whether IAL helps to fuel or extinguish inflammation. Impact statement Inflammatory progression is present in acute and chronic tissue pathologies throughout the body. Lymphatic vessels play physiological roles relevant to all medical fields as important regulators of fluid balance, immune cell trafficking, and immune identity. Lymphangiogenesis is often concurrent with inflammation and can potentially aide or worsen disease progression. How new lymphatic vessels impact inflammation and by which mechanism is an important consideration in current and future clinical therapies targeting inflammation and/or vasculogenesis. This review identifies, across a range of tissue-specific pathologies, the current understanding of inflammation-associated lymphangiogenesis in the progression or resolution of inflammation.
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Affiliation(s)
- Gabriella R Abouelkheir
- 1 Division of Lymphatic Biology, Department of Medical Physiology, Texas A&M College of Medicine, College Station, TX 77843, USA
| | - Bradley D Upchurch
- 1 Division of Lymphatic Biology, Department of Medical Physiology, Texas A&M College of Medicine, College Station, TX 77843, USA
| | - Joseph M Rutkowski
- 1 Division of Lymphatic Biology, Department of Medical Physiology, Texas A&M College of Medicine, College Station, TX 77843, USA
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19
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Clinical value of non-HLA antibodies in kidney transplantation: Still an enigma? Transplant Rev (Orlando) 2016; 30:195-202. [DOI: 10.1016/j.trre.2016.06.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 04/22/2016] [Accepted: 06/01/2016] [Indexed: 12/14/2022]
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20
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Affiliation(s)
- John E Hall
- From the Department of Physiology and Biophysics, Mississippi Center for Obesity Research, University of Mississippi Medical Center, Jackson.
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21
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Hyndman KA, Dugas C, Arguello AM, Goodchild TT, Buckley KM, Burch M, Yanagisawa M, Pollock JS. High salt induces autocrine actions of ET-1 on inner medullary collecting duct NO production via upregulated ETB receptor expression. Am J Physiol Regul Integr Comp Physiol 2016; 311:R263-71. [PMID: 27280426 DOI: 10.1152/ajpregu.00016.2015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 05/24/2016] [Indexed: 12/22/2022]
Abstract
The collecting duct endothelin-1 (ET-1), endothelin B (ETB) receptor, and nitric oxide synthase-1 (NOS1) pathways are critical for regulation of fluid-electrolyte balance and blood pressure control during high-salt feeding. ET-1, ETB receptor, and NOS1 are highly expressed in the inner medullary collecting duct (IMCD) and vasa recta, suggesting that there may be cross talk or paracrine signaling between the vasa recta and IMCD. The purpose of this study was to test the hypothesis that endothelial cell-derived ET-1 (paracrine) and collecting duct-derived ET-1 (autocrine) promote IMCD nitric oxide (NO) production through activation of the ETB receptor during high-salt feeding. We determined that after 7 days of a high-salt diet (HS7), there was a shift to 100% ETB expression in IMCDs, as well as a twofold increase in nitrite production (a metabolite of NO), and this increase could be prevented by acute inhibition of the ETB receptor. ETB receptor blockade or NOS1 inhibition also prevented the ET-1-dependent decrease in ion transport from primary IMCDs, as determined by transepithelial resistance. IMCD were also isolated from vascular endothelial ET-1 knockout mice (VEETKO), collecting duct ET-1 KO (CDET-1KO), and flox controls. Nitrite production by IMCD from VEETKO and flox mice was similarly increased twofold with HS7. However, IMCD NO production from CDET-1KO mice was significantly blunted with HS7 compared with flox control. Taken together, these data indicate that during high-salt feeding, the autocrine actions of ET-1 via upregulation of the ETB receptor are critical for IMCD NO production, facilitating inhibition of ion reabsorption.
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Affiliation(s)
- Kelly Anne Hyndman
- Section of Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Courtney Dugas
- Section of Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Alexandra M Arguello
- Section of Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Traci T Goodchild
- Pharmacology and Experimental Therapeutics, Louisiana State University Health Science Center, New Orleans, Louisiana; and
| | | | - Mariah Burch
- Section of Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; Department of Medicine, Augusta University, Augusta, Georgia
| | - Masashi Yanagisawa
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, Texas; and International Institute for Integrative Sleep Medicine, University of Tsukuba, Tsukuba, Japan
| | - Jennifer S Pollock
- Section of Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; Department of Medicine, Augusta University, Augusta, Georgia;
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Palygin O, Miller B, Ilatovskaya DV, Sorokin A, Staruschenko A. Two-photon imaging of endothelin-1-mediated intracellular Ca(2+) handling in smooth muscle cells of rat renal resistance arteries. Life Sci 2015; 159:140-143. [PMID: 26682937 DOI: 10.1016/j.lfs.2015.12.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 11/19/2015] [Accepted: 12/09/2015] [Indexed: 02/05/2023]
Abstract
AIMS Endothelin-1 (ET-1) is a potent vasoconstrictor which regulates the physiology of cardiorenal system. The aim of this study was to evaluate ET-1-mediated elevation of intracellular Ca(2+) in smooth muscle cells (SMC) of renal resistance arteries. MAIN METHODS In in vitro studies of primary SMC, which were isolated from rat renal microvessels, the levels of intracellular Ca(2+) were calculated from the ratio of emissions at 340 and 380nm after loading cells with Fura 2-AM dye. In ex vivo studies we used two-photon imaging of renal resistance arteries excised from rat kidneys and loaded with fluorescent Ca(2+) indicator Fluo-4 AM. KEY FINDINGS The two-photon imaging demonstrates that treatment of isolated rat renal resistance arteries with ET-1 causes a rapid increase of intracellular Ca(2+) concentration in smooth muscle vasculature of these vessels. These ex vivo observations are in accordance with in vitro findings indicating that ET-1 mediates activation of TRPC channels and increases the level of intracellular Ca(2+) in cultured SMC to 510±83nM. SIGNIFICANCE ET-1-mediated elevation of intracellular Ca(2+) is strongly linked to renal microvascular contraction and is crucial for ET-1-induced contraction of SMC. The two-photon imaging of intracellular Ca(2+) in intact SMC of rat renal resistance arteries is a powerful technique which allows the detailed ex vivo analysis of intracellular Ca(2+) handling by ET-1, an important player in hypertension-related kidney diseases.
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Affiliation(s)
- Oleg Palygin
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Bradley Miller
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Daria V Ilatovskaya
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Andrey Sorokin
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA; Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Alexander Staruschenko
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
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