1
|
Ho QV, Young MJ. Mineralocorticoid receptors, macrophages and new mechanisms for cardiovascular disease. Mol Cell Endocrinol 2024; 593:112340. [PMID: 39134137 DOI: 10.1016/j.mce.2024.112340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 08/01/2024] [Accepted: 08/05/2024] [Indexed: 08/16/2024]
Affiliation(s)
- Quoc Viet Ho
- Cardiovascular Endocrinology Laboratory, Baker Heart and Diabetes Institute, Australia
| | - Morag J Young
- Cardiovascular Endocrinology Laboratory, Baker Heart and Diabetes Institute, Australia; Department of Cardiometabolic Health, University of Melbourne, Victoria, Australia.
| |
Collapse
|
2
|
Crompton M, Skinner LJ, Satchell SC, Butler MJ. Aldosterone: Essential for Life but Damaging to the Vascular Endothelium. Biomolecules 2023; 13:1004. [PMID: 37371584 PMCID: PMC10296074 DOI: 10.3390/biom13061004] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/12/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023] Open
Abstract
The renin angiotensin aldosterone system is a key regulator of blood pressure. Aldosterone is the final effector of this pathway, acting predominantly via mineralocorticoid receptors. Aldosterone facilitates the conservation of sodium and, with it, water and acts as a powerful stimulus for potassium excretion. However, evidence for the pathological impact of excess mineralocorticoid receptor stimulation is increasing. Here, we discussed how in the heart, hyperaldosteronism is associated with fibrosis, cardiac dysfunction, and maladaptive hypertrophy. In the kidney, aldosterone was shown to cause proteinuria and fibrosis and may contribute to the progression of kidney disease. More recently, studies suggested that aldosterone excess damaged endothelial cells. Here, we reviewed how damage to the endothelial glycocalyx may contribute to this process. The endothelial glycocalyx is a heterogenous, negatively charged layer on the luminal surface of cells. Aldosterone exposure alters this layer. The resulting structural changes reduced endothelial reactivity in response to protective shear stress, altered permeability, and increased immune cell trafficking. Finally, we reviewed current therapeutic strategies for limiting endothelial damage and suggested that preventing glycocalyx remodelling in response to aldosterone exposure may provide a novel strategy, free from the serious adverse effect of hyperkalaemia seen in response to mineralocorticoid blockade.
Collapse
Affiliation(s)
| | | | | | - Matthew J. Butler
- Bristol Renal, Dorothy Hodgkin Building, University of Bristol, Whitson Street, Bristol BS1 3NY, UK
| |
Collapse
|
3
|
Wang R, Fang D, Lin T, Liang W, Qiao H. Aldosterone activates ERK phosphorylation in the nucleus tractus solitarius. Neurosci Lett 2023; 803:137188. [PMID: 36921665 DOI: 10.1016/j.neulet.2023.137188] [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: 12/30/2022] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/14/2023]
Abstract
Sodium intake effect of aldosterone has attracted much attention. In our recent study, aldosterone can play a nongenomic regulatory role on rapid sodium intake in the NTS (nucleus tractus solitarius) by activating G protein-coupled estrogen receptor (GPER), and it exhibited an obvious time-dependent and concentration-dependent regulation. However, the molecular mechanism how aldosterone regulated sodium intake rapidly, is unclear. To determine the molecular mechanism of rapid sodium intake regulation of aldosterone, rats with a stainless-steel cannula in the NTS were used (n = 6 each subgroup), and were injected different concentrations of aldosterone/G1 (GPER agonist)/G15 (GPER antagonist) at different time points, then detected ERK1/2 protein expression. The results showed that aldosterone/G1 increased the ERK1/2 protein phosphorylation, and presented a time-dependent and concentration-dependent similar to sodium intake; Meanwhile, G15 partially blocked this effect at least. Taken together, we postulate that ERK1/2 protein may influence nongenomic sodium intake regulated by aldosterone at nucleus tractus solitarius level.
Collapse
Affiliation(s)
- Rui Wang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China
| | - Dan Fang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China
| | - Tingting Lin
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China
| | - Wenhui Liang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China
| | - Hu Qiao
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China.
| |
Collapse
|
4
|
Role of high-salt diet in non-alcoholic fatty liver disease: a mini-review of the evidence. Eur J Clin Nutr 2022; 76:1053-1059. [PMID: 34773093 DOI: 10.1038/s41430-021-01044-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/11/2021] [Accepted: 10/22/2021] [Indexed: 11/08/2022]
Abstract
With the rising incidence of both obesity and diabetes, non-alcoholic fatty liver disease (NAFLD) has become the most common chronic liver disease worldwide. However, lifestyle intervention remains to be an effective approach for NAFLD due to lack of therapeutic medication. Recently, salt, an essential micronutrient free of calories, has raised a global concern owing to its wide-range healthy relevance. Accumulated evidence has suggested that a long-term high-salt diet (HSD) independently increases the risk of NAFLD. In the past decades, a number of studies have been reported regarding the mechanism of much investigation concerning HSD-induced NAFLD. Here, we review the updates in epidemiology and molecular mechanism of HSD-induced NAFLD and provide a novel insight into the role of HSD in the regulation of lipid metabolism.
Collapse
|
5
|
Cabrera D, Rao I, Raasch F, Solis N, Pizarro M, Freire M, Sáenz De Urturi D, Ramírez CA, Triantafilo N, León J, Riquelme A, Barrera F, Baudrand R, Aspichueta P, Arrese M, Arab JP. Mineralocorticoid receptor modulation by dietary sodium influences NAFLD development in mice. Ann Hepatol 2022; 24:100357. [PMID: 33940220 DOI: 10.1016/j.aohep.2021.100357] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/02/2021] [Accepted: 03/02/2021] [Indexed: 02/04/2023]
Abstract
INTRODUCTION AND OBJECTIVES Nonalcoholic-fatty-liver disease (NAFLD) is considered the hepatic manifestation of metabolic syndrome (MetS). Mineralocorticoid receptor (MR) activation is associated with increased risk of MetS but few studies have assessed the role of liver MR on NAFLD. We aimed to evaluate the effect of MR modulation by sodium intake in liver injury in experimental models of NAFLD. MATERIALS AND METHODS C57BL/6J mice were fed either a high-fat-diet (HFD) or a choline/methionine deficient (MCD) diet with different sodium concentrations. Hepatic concentration of lipid species, serum aldosterone levels, expression of MR, proinflammatory and profibrotic markers and liver histology were assessed. RESULTS Mice fed with High-Na+/HFD showed a lower MR expression in liver (p = 0.01) and less steatosis on histology (p = 0.04). Consistently, animals from this group exhibited lower levels of serum aldosterone (p = 0.028) and lower hepatic triglyceride content (p = 0.008). This associated to a reduced expression of lipogenic genes, significant changes in lipid subspecies, lower HOMA-IR (p < 0.05), and lower expression of pro-inflammatory and profibrotic markers compared to those mice fed a Low-Na+/HFD. Additionally, mice fed a High-Na+/HFD showed higher expression of salt-inducible kinase (SIK)-1 and lower expression of serum-and-glucocorticoid-inducible kinase (SGK)-1. Similar results were observed with the MCD diet model. CONCLUSION We identified in two experimental models of NAFLD that High-Na+ diet content is associated to lower serum aldosterone levels and hepatic MR downregulation, associated to decreased steatosis and reduced de novo hepatic lipogenesis, proinflammatory and profibrotic markers. Decreased activation of hepatic MR seems to generate beneficial downstream inhibition of lipogenesis in experimental NAFLD.
Collapse
Affiliation(s)
- Daniel Cabrera
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile; Facultad de Ciencias Médicas, Universidad Bernardo O Higgins, Santiago, Chile
| | - Isabel Rao
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Fabiola Raasch
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Nancy Solis
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Margarita Pizarro
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Mariela Freire
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | | | | | - Nicolás Triantafilo
- Departamento de Hematologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Jonathan León
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Arnoldo Riquelme
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile; Departamento de Ciencias de la Salud, Facultad de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Francisco Barrera
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Rene Baudrand
- Departamento de Endocrinologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Patricia Aspichueta
- Department of Physiology, University of the Basque Country UPV/EHU, Leioa, Spain; Biocruces Health Research Institute, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain
| | - Marco Arrese
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile; Centro de Envejecimiento y Regeneracion (CARE), Departamento de Biologia Celular y Molecular, Facultad de Ciencias Biologicas Pontificia Universidad Catolica de Chile, Santiago, Chile.
| | - Juan P Arab
- Departamento de Gastroenterologia, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile; Centro de Envejecimiento y Regeneracion (CARE), Departamento de Biologia Celular y Molecular, Facultad de Ciencias Biologicas Pontificia Universidad Catolica de Chile, Santiago, Chile.
| |
Collapse
|
6
|
Wouda RD, Waanders F, de Zeeuw D, Navis G, Vogt L. Diminished antiproteinuric effect of the angiotensin receptor blocker losartan during high potassium intake in patients with CKD. Clin Kidney J 2021; 14:2170-2176. [PMID: 34603695 PMCID: PMC8483678 DOI: 10.1093/ckj/sfab031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 01/11/2021] [Indexed: 11/14/2022] Open
Abstract
Background Angiotensin II type 1 receptor blockers (ARBs) lower blood pressure (BP) and proteinuria and reduce renal disease progression in many-but not all-patients. Reduction of dietary sodium intake improves these effects of ARBs. Dietary potassium intake affects BP and proteinuria. We set out to address the effect of potassium intake on BP and proteinuria response to losartan in non-diabetic proteinuric chronic kidney disease (CKD) patients. Methods We performed a post hoc analysis of a placebo-controlled interventional cross-over study in 33 non-diabetic proteinuric patients (baseline mean arterial pressure and proteinuria: 105 mmHg and 3.8 g/day, respectively). Patients were treated for 6 weeks with placebo, losartan and losartan/hydrochlorothiazide (HCT), combined with a habitual (∼200 mmol/day) and low-sodium (LS) diet (<100 mmol/day), in randomized order. To analyse the effects of potassium intake, we categorized patients based on median split of 24-h urinary potassium excretion, reflecting potassium intake. Results Mean potassium intake was stable during all six treatment periods. Losartan and losartan/HCT lowered BP and proteinuria in all treatment groups. Patients with high potassium intake showed no difference in the BP effects compared with patients with low potassium intake. The antiproteinuric response to losartan monotherapy and losartan combined with HCT during the habitual sodium diet was significantly diminished in patients with high potassium intake (20% versus 41%, P = 0.011; and 48% versus 64%, P = 0.036). These differences in antiproteinuric response abolished when shifting to the LS diet. Conclusions In proteinuric CKD patients, the proteinuria, but not BP-lowering response to losartan during a habitual high-sodium diet was hampered during high potassium intake. Differences disappeared after sodium status change by LS diet.
Collapse
Affiliation(s)
- Rosa D Wouda
- Amsterdam Cardiovascular Sciences, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | | | - Dick de Zeeuw
- University Medical Center Groningen, Groningen, The Netherlands
| | - Gerjan Navis
- University Medical Center Groningen, Groningen, The Netherlands
| | - Liffert Vogt
- Amsterdam Cardiovascular Sciences, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | | |
Collapse
|
7
|
Abstract
Steroid hormones bind receptors in the cell nucleus and in the cell membrane. The most widely studied class of steroid hormone receptors are the nuclear receptors, named for their function as ligand-dependent transcription factors in the cell nucleus. Nuclear receptors, such as estrogen receptor alpha, can also be anchored to the plasma membrane, where they respond to steroids by activating signaling pathways independent of their function as transcription factors. Steroids can also bind integral membrane proteins, such as the G protein-coupled estrogen receptor. Membrane estrogen and progestin receptors have been cloned and characterized in vitro and influence the development and function of many organ systems. Membrane androgen receptors were cloned and characterized in vitro, but their function as androgen receptors in vivo is unresolved. We review the identity and function of membrane proteins that bind estrogens, progestins, and androgens. We discuss evidence that membrane glucocorticoid and mineralocorticoid receptors exist, and whether glucocorticoid and mineralocorticoid nuclear receptors act at the cell membrane. In many cases, integral membrane steroid receptors act independently of nuclear steroid receptors, even though they may share a ligand.
Collapse
Affiliation(s)
- Lindsey S Treviño
- Department of Population Sciences, Division of Health Equities, City of Hope Comprehensive Cancer Center, Duarte, CA 91010, USA
| | - Daniel A Gorelick
- Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
- Correspondence: Daniel A Gorelick, PhD, One Baylor Plaza, Alkek Building N1317.07, Houston, TX, 77030-3411, USA.
| |
Collapse
|
8
|
Song X, Zhao Y, Wang S, Wang Y, Chen Q, Zhao H, Wang H, Tian S, Yu H, Wu Z. Zi Shen Huo Luo Formula Enhances the Therapeutic Effects of Angiotensin-Converting Enzyme Inhibitors on Hypertensive Left Ventricular Hypertrophy by Interfering With Aldosterone Breakthrough and Affecting Caveolin-1/Mineralocorticoid Receptor Colocalization and Downstream Extracellular Signal-Regulated Kinase Signaling. Front Pharmacol 2020; 11:383. [PMID: 32317965 PMCID: PMC7147343 DOI: 10.3389/fphar.2020.00383] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 03/12/2020] [Indexed: 12/24/2022] Open
Abstract
Left ventricular hypertrophy (LVH) is an important characteristic of hypertensive heart disease. Renin-angiotensin system (RAS) blockers have been shown to be effective drugs for the reversal of LVH. Clinical and experimental studies have shown that Zi Shen Huo Luo Formula (ZSHLF) can improve the efficacy of perindopril in the treatment of hypertensive LVH, but its mechanism is unclear. This study aimed to investigate the possible mechanism to improve the efficacy of perindopril. First, we identified 23 compounds in ZSHLF by ultra performance liquid chromatography/tandem mass spectrometry (UPLC-MS/MS) analysis, among which ferulic acid, caffeic acid, vanillic acid, berberine, rutin, quercetin, kaempferol, stachydrine, and tiliroside have been reported to reduce blood pressure and exhibit cardioprotective effects. Second, we treated spontaneously hypertensive rats (SHRs) with perindopril and ZSHLF for 12 continuous weeks and found that chronic use of perindopril could increase the aldosterone (ALD) levels and cause aldosterone breakthrough (ABT). ZSHLF combined with perindopril reduced the ALD levels, interfered with ABT, decreased blood pressure, improved left ventricular diastolic dysfunction, and decreased the collagen volume fraction; these effects were superior to those of perindopril alone. In vitro experiments, ALD-induced cardiomyocytes (H9c2 cells) and cardiac fibroblasts were treated with ZSHLF-containing serum, which suppressed ALD-induced cardiomyocyte hypertrophy and cardiac fibroblast proliferation, increased mineralocorticoid receptor (MR) and Cav-1 colocalization and decreased phosphorylated epidermal growth factor receptor (pEGFR) and phosphorylated extracellular signal-regulated kinase (pERK) protein expression the cells. In conclusion, ZSHLF can interfere with ABT and affect the pathological role of ALD by affecting MR and Cav-1 interactions and EGFR/ERK signaling pathway. These effects represent a possible mechanism by which ZSHLF improves the efficacy of angiotensin-converting enzyme inhibitors (ACEIs) in hypertensive LVH treatment. However, the major bioactive components or metabolites responsible for the effects and the implications of these findings in patients need further verification.
Collapse
Affiliation(s)
- Xiaotong Song
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.,Shandong Co-innovation Center of Classic TCM Formula, Shandong Provincial Education Department, Jinan, China
| | - Yue Zhao
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shijun Wang
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.,Shandong Co-innovation Center of Classic TCM Formula, Shandong Provincial Education Department, Jinan, China
| | - Yuan Wang
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.,Shandong Co-innovation Center of Classic TCM Formula, Shandong Provincial Education Department, Jinan, China
| | - Qian Chen
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.,Shandong Co-innovation Center of Classic TCM Formula, Shandong Provincial Education Department, Jinan, China
| | - Haijun Zhao
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.,Shandong Co-innovation Center of Classic TCM Formula, Shandong Provincial Education Department, Jinan, China
| | - Hua Wang
- Department of Geriatric Medicine, Hospital Affiliated to Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Sheng Tian
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.,Shandong Co-innovation Center of Classic TCM Formula, Shandong Provincial Education Department, Jinan, China
| | - Huayun Yu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.,Shandong Co-innovation Center of Classic TCM Formula, Shandong Provincial Education Department, Jinan, China
| | - Zhichun Wu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.,Shandong Co-innovation Center of Classic TCM Formula, Shandong Provincial Education Department, Jinan, China
| |
Collapse
|
9
|
Huang Y, Ting PY, Yao TM, Homma T, Brooks D, Katayama Rangel I, Adler GK, Romero JR, Williams JS, Pojoga LH, Williams GH. Histone demethylase LSD1 deficiency and biological sex: impact on blood pressure and aldosterone production. J Endocrinol 2019; 240:111-122. [PMID: 30400034 PMCID: PMC6824586 DOI: 10.1530/joe-18-0247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 10/26/2018] [Indexed: 12/15/2022]
Abstract
Human risk allele carriers of lysine-specific demethylase 1 (LSD1) and LSD1-deficient mice have salt-sensitive hypertension for unclear reasons. We hypothesized that LSD1 deficiency causes dysregulation of aldosterone's response to salt intake resulting in increased cardiovascular risk factors (blood pressure and microalbumin). Furthermore, we determined the effect of biological sex on these potential abnormalities. To test our hypotheses, LSD1 male and female heterozygote-knockout (LSD1+/-) and WT mice were assigned to two age groups: 18 weeks and 36 weeks. Plasma aldosterone levels and aldosterone production from zona glomerulosa cells studied ex vivo were greater in both male and female LSD1+/- mice consuming a liberal salt diet as compared to WT mice consuming the same diet. However, salt-sensitive blood pressure elevation and increased microalbuminuria were only observed in male LSD1+/- mice. These data suggest that LSD1 interacts with aldosterone's secretory response to salt intake. Lack of LSD1 causes inappropriate aldosterone production on a liberal salt diet; males appear to be more sensitive to this aldosterone increase as males, but not females, develop salt sensitivity of blood pressure and increased microalbuminuria. The mechanism responsible for the cardiovascular protective effect in females is uncertain but may be related to estrogen modulating the effect of mineralocorticoid receptor activation.
Collapse
Affiliation(s)
- Yuefei Huang
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Pei Yee Ting
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Tham M Yao
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Tsuyoshi Homma
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Danielle Brooks
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Isis Katayama Rangel
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Gail K Adler
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jose R Romero
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jonathan S Williams
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Luminita H Pojoga
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Gordon H Williams
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
10
|
The exaggerated salt-sensitive response in hypertensive transgenic rats (TGR mRen-2) fostered by a normotensive female. Hypertens Res 2018; 42:459-468. [DOI: 10.1038/s41440-018-0157-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 09/04/2018] [Accepted: 10/01/2018] [Indexed: 11/08/2022]
|
11
|
Mayurasakorn K, Hasanah N, Homma T, Homma M, Rangel IK, Garza AE, Romero JR, Adler GK, Williams GH, Pojoga LH. Caloric restriction improves glucose homeostasis, yet increases cardiometabolic risk in caveolin-1-deficient mice. Metabolism 2018; 83:92-101. [PMID: 29410348 PMCID: PMC10619427 DOI: 10.1016/j.metabol.2018.01.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 12/18/2017] [Accepted: 01/17/2018] [Indexed: 01/09/2023]
Abstract
BACKGROUND AND PURPOSE The plasma membrane protein caveolin-1 (CAV-1) has been shown to be involved in modulating glucose homeostasis and the actions of the renin-angiotensin-aldosterone system (RAAS). Caloric restriction (CR) is widely accepted as an effective therapeutic approach to improve insulin sensitivity and reduce the severity of diabetes. Recent data indicate that polymorphisms of the CAV-1 gene are strongly associated with insulin resistance, hypertension and metabolic abnormalities in non-obese individuals. Therefore, we sought to determine whether CR improves the metabolic and cardiovascular (CV) risk factors in the lean CAV-1 KO mice. MATERIALS/METHODS Twelve- to fourteen-week-old CAV-1 knockout (KO) and genetically matched wild-type (WT) male mice were randomized by genotype to one of two dietary regimens: ad libitum (ad lib) food intake or 40% CR for 4 weeks. Three weeks following the onset of dietary restriction, all groups were assessed for insulin sensitivity. At the end of the study, all groups were assessed for fasting glucose, insulin, HOMA-IR, lipids, corticosterone levels and blood pressure (BP). Aldosterone secretion was determined from acutely isolated Zona Glomerulosa cells. RESULTS We confirmed that the CAV-1 KO mice on the ad lib diet display a phenotype consistent with the cardiometabolic syndrome, as shown by higher systolic BP (SBP), plasma glucose, HOMA-IR and aldosterone levels despite lower body weight compared with WT mice on the ad lib diet. CAV-1 KO mice maintained their body weight on the ad lib diet, but had substantially greater weight loss with CR, as compared to caloric restricted WT mice. CR-mediated changes in weight were associated with dramatic improvements in glucose and insulin tolerance in both genotypes. These responses to CR, however, were more robust in CAV-1KO vs. WT mice and were accompanied by reductions in plasma glucose, insulin and HOMA-IR in CAV-1KO but not WT mice. Surprisingly, in the CAV-1 KO, but not in WT mice, CR was associated with increased SBP and aldosterone levels, suggesting that in CAV-1 KO mice CR induced an increase in some CV risk factors. CONCLUSIONS CR improved the metabolic phenotype in CAV-1 KO mice by increasing insulin sensitivity; nevertheless, this intervention also increased CV risk by inappropriate adaptive responses in the RAAS and BP.
Collapse
Affiliation(s)
- Korapat Mayurasakorn
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Nurul Hasanah
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA; Universiti Teknologi MARA, Kuala Lumpur, Malaysia
| | - Tsuyoshi Homma
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Mika Homma
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Isis Katayama Rangel
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Amanda E Garza
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Jose R Romero
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Gail K Adler
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Gordon H Williams
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Luminita H Pojoga
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
| |
Collapse
|
12
|
Leal S, Ricardo Jorge DO, Joana B, Maria S, Isabel S. Heavy Alcohol Consumption Effects on Blood Pressure and on Kidney Structure Persist After Long-Term Withdrawal. Kidney Blood Press Res 2017; 42:664-675. [DOI: 10.1159/000482022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 08/07/2017] [Indexed: 11/19/2022] Open
|
13
|
Glucocorticoid Receptor-mediated transactivation is hampered by Striatin-3, a novel interaction partner of the receptor. Sci Rep 2017; 7:8941. [PMID: 28827617 PMCID: PMC5567040 DOI: 10.1038/s41598-017-09246-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 07/19/2017] [Indexed: 12/12/2022] Open
Abstract
The transcriptional activity of the glucocorticoid receptor (GR) is co-determined by its ability to recruit a vast and varying number of cofactors. We here identify Striatin-3 (STRN3) as a novel interaction partner of GR that interferes with GR’s ligand-dependent transactivation capacity. Remarkably, STRN3 selectively affects only GR-dependent transactivation and leaves GR-dependent transrepression mechanisms unhampered. We found that STRN3 down-regulates GR transactivation by an additional recruitment of the catalytic subunit of protein phosphatase 2A (PPP2CA) to GR. We hypothesize the existence of a functional trimeric complex in the nucleus, able to dephosphorylate GR at serine 211, a known marker for GR transactivation in a target gene-dependent manner. The presence of STRN3 appears an absolute prerequisite for PPP2CA to engage in a complex with GR. Herein, the C-terminal domain of GR is essential, reflecting ligand-dependency, yet other receptor parts are also needed to create additional contacts with STRN3.
Collapse
|
14
|
Nader M, Alotaibi S, Alsolme E, Khalil B, Abu-Zaid A, Alsomali R, Bakheet D, Dzimiri N. Cardiac striatin interacts with caveolin-3 and calmodulin in a calcium sensitive manner and regulates cardiomyocyte spontaneous contraction rate. Can J Physiol Pharmacol 2017; 95:1306-1312. [PMID: 28825318 DOI: 10.1139/cjpp-2017-0155] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Impaired cardiomyocyte contraction rate is detrimental to cardiac function and often lethal. Despite advancements in the field, there is a paucity of information regarding the coordination of molecules implicated in regulating the heart rate. Striatin (STRN) is a dynamic protein with binding domains to calmodulin (CaM) and caveolin (Cav), both of which are regulators of myocardial function. However, its role in cardiomyocyte contraction is not yet determined. Herein, we show that STRN is expressed in cardiomyocytes and is more abundant in atrial myocardium than in ventricles. Cardiac expression of STRN (protein and mRNA) was developmentally regulated with the highest expression being at neonatal stage (day one) and the lowest in adult rats (13 weeks). CaM pulldown assay indicated that the interaction of cardiac STRN with CaM and caveolin-3 (Cav-3) was calcium sensitive. Interestingly, the overexpression of STRN induced an increase (∼2-fold) in the rate of the spontaneous contraction of cultured cardiomyocytes, while the knockdown of STRN reduced their contraction rate (∼40%). The expression level of STRN was inversely proportional to the interaction of Cav-3 with the CaM/STRN complex. Collectively, our data delineate a novel role for STRN in regulating cardiomyocyte spontaneous contraction rate and the dynamics of the STRN/Cav-3/CaM complex.
Collapse
Affiliation(s)
- Moni Nader
- a Department of Physiological Sciences, College of Medicine, Alfaisal University, Riyadh 11533, Kingdom of Saudi Arabia.,b Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| | - Shahd Alotaibi
- a Department of Physiological Sciences, College of Medicine, Alfaisal University, Riyadh 11533, Kingdom of Saudi Arabia.,b Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| | - Ebtehal Alsolme
- a Department of Physiological Sciences, College of Medicine, Alfaisal University, Riyadh 11533, Kingdom of Saudi Arabia.,b Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| | - Bariaa Khalil
- a Department of Physiological Sciences, College of Medicine, Alfaisal University, Riyadh 11533, Kingdom of Saudi Arabia.,b Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| | - Ahmed Abu-Zaid
- a Department of Physiological Sciences, College of Medicine, Alfaisal University, Riyadh 11533, Kingdom of Saudi Arabia.,b Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| | - Rahmah Alsomali
- b Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| | - Dana Bakheet
- b Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| | - Nduna Dzimiri
- b Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| |
Collapse
|
15
|
Ruhs S, Nolze A, Hübschmann R, Grossmann C. 30 YEARS OF THE MINERALOCORTICOID RECEPTOR: Nongenomic effects via the mineralocorticoid receptor. J Endocrinol 2017; 234:T107-T124. [PMID: 28348113 DOI: 10.1530/joe-16-0659] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 03/27/2017] [Indexed: 12/12/2022]
Abstract
The mineralocorticoid receptor (MR) belongs to the steroid hormone receptor family and classically functions as a ligand-dependent transcription factor. It is involved in water-electrolyte homeostasis and blood pressure regulation but independent from these effects also furthers inflammation, fibrosis, hypertrophy and remodeling in cardiovascular tissues. Next to genomic effects, aldosterone elicits very rapid actions within minutes that do not require transcription or translation and that occur not only in classical MR epithelial target organs like kidney and colon but also in nonepithelial tissues like heart, vasculature and adipose tissue. Most of these effects can be mediated by classical MR and its crosstalk with different signaling cascades. Near the plasma membrane, the MR seems to be associated with caveolin and striatin as well as with receptor tyrosine kinases like EGFR, PDGFR and IGF1R and G protein-coupled receptors like AT1 and GPER1, which then mediate nongenomic aldosterone effects. GPER1 has also been named a putative novel MR. There is a close interaction and functional synergism between the genomic and the nongenomic signaling so that nongenomic signaling can lead to long-term effects and support genomic actions. Therefore, understanding nongenomic aldosterone/MR effects is of potential relevance for modulating genomic aldosterone effects and may provide additional targets for intervention.
Collapse
Affiliation(s)
- Stefanie Ruhs
- Julius Bernstein Institute of PhysiologyMartin Luther University Halle-Wittenberg, Halle, Germany
| | - Alexander Nolze
- Julius Bernstein Institute of PhysiologyMartin Luther University Halle-Wittenberg, Halle, Germany
| | - Ralf Hübschmann
- Julius Bernstein Institute of PhysiologyMartin Luther University Halle-Wittenberg, Halle, Germany
| | - Claudia Grossmann
- Julius Bernstein Institute of PhysiologyMartin Luther University Halle-Wittenberg, Halle, Germany
| |
Collapse
|
16
|
Baudrand R, Gupta N, Garza AE, Vaidya A, Leopold JA, Hopkins PN, Jeunemaitre X, Ferri C, Romero JR, Williams J, Loscalzo J, Adler GK, Williams GH, Pojoga LH. Caveolin 1 Modulates Aldosterone-Mediated Pathways of Glucose and Lipid Homeostasis. J Am Heart Assoc 2016; 5:JAHA.116.003845. [PMID: 27680666 PMCID: PMC5121487 DOI: 10.1161/jaha.116.003845] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background Overactivation of the aldosterone and mineralocorticoid receptor (MR) pathway is associated with hyperglycemia and dyslipidemia. Caveolin 1 (cav‐1) is involved in glucose/lipid homeostasis and may modulate MR signaling. We investigated the interplay between cav‐1 and aldosterone signaling in modulating insulin resistance and dyslipidemia in cav‐1–null mice and humans with a prevalent variant in the CAV1 gene. Methods and Results In mouse studies, cav‐1 knockout mice exhibited higher levels of homeostatic model assessment of insulin resistance, cholesterol, and resistin and lower ratios of high‐ to low‐density lipoprotein (all P<0.001 versus wild type). Moreover, cav‐1 knockout mice displayed hypertriglyceridemia and higher mRNA levels for resistin, retinol binding protein 4, NADPH oxidase 4, and aldose reductase in liver and/or fat tissues. MR blockade with eplerenone significantly decreased glycemia (P<0.01), total cholesterol (P<0.05), resistin (P<0.05), and described enzymes, with no effect on insulin or triglycerides. In the human study, we analyzed the CAV1 gene polymorphism rs926198 in 556 white participants; 58% were minor allele carriers and displayed higher odds of insulin resistance (odds ratio 2.26 [95% CI 1.40–3.64]) and low high‐density lipoprotein (odds ratio 1.54 [95% CI 1.01–3.37]). Aldosterone levels correlated with higher homeostatic model assessment of insulin resistance and resistin and lower high‐density lipoprotein only in minor allele carriers. CAV1 gene expression quantitative trait loci data revealed lower cav‐1 expression in adipose tissues by the rs926198 minor allele. Conclusions Our findings in mice and humans suggested that decreased cav‐1 expression may activate the effect of aldosterone/MR signaling on several pathways of glycemia, dyslipidemia, and resistin. In contrast, hyperinsulinemia and hypertriglyceridemia are likely mediated by MR‐independent mechanisms. Future human studies will elucidate the clinical relevance of MR blockade in patients with genotype‐mediated cav‐1 deficiency.
Collapse
Affiliation(s)
- Rene Baudrand
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA Department of Endocrinology, School of Medicine, Pontificia Universidad Catolica De Chile, Santiago, Chile
| | - Nidhi Gupta
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Amanda E Garza
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Anand Vaidya
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Jane A Leopold
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Paul N Hopkins
- Cardiovascular Genetics, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT
| | - Xavier Jeunemaitre
- Centre d'Investigation Clinique Inserm/AP, Departement de Genetique, Hȏpital European Georges Pompidou, Paris, France
| | - Claudio Ferri
- Department MeSVA, San Salvatore Hospital, University of L'Aquila, Italy
| | - Jose R Romero
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Jonathan Williams
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Joseph Loscalzo
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Gail K Adler
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Gordon H Williams
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Luminita H Pojoga
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| |
Collapse
|
17
|
Murfitt L, Whiteley G, Iqbal MM, Kitmitto A. Targeting caveolin-3 for the treatment of diabetic cardiomyopathy. Pharmacol Ther 2015; 151:50-71. [PMID: 25779609 DOI: 10.1016/j.pharmthera.2015.03.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 03/09/2015] [Indexed: 12/21/2022]
Abstract
Diabetes is a global health problem with more than 550 million people predicted to be diabetic by 2030. A major complication of diabetes is cardiovascular disease, which accounts for over two-thirds of mortality and morbidity in diabetic patients. This increased risk has led to the definition of a diabetic cardiomyopathy phenotype characterised by early left ventricular dysfunction with normal ejection fraction. Here we review the aetiology of diabetic cardiomyopathy and explore the involvement of the protein caveolin-3 (Cav3). Cav3 forms part of a complex mechanism regulating insulin signalling and glucose uptake, processes that are impaired in diabetes. Further, Cav3 is key for stabilisation and trafficking of cardiac ion channels to the plasma membrane and so contributes to the cardiac action potential shape and duration. In addition, Cav3 has direct and indirect interactions with proteins involved in excitation-contraction coupling and so has the potential to influence cardiac contractility. Significantly, both impaired contractility and rhythm disturbances are hallmarks of diabetic cardiomyopathy. We review here how changes to Cav3 expression levels and altered relationships with interacting partners may be contributory factors to several of the pathological features identified in diabetic cardiomyopathy. Finally, the review concludes by considering ways in which levels of Cav3 may be manipulated in order to develop novel therapeutic approaches for treating diabetic cardiomyopathy.
Collapse
Affiliation(s)
- Lucy Murfitt
- Institute of Cardiovascular Sciences, Faculty of Medical and Human Sciences, University of Manchester, M13 9NT, UK
| | - Gareth Whiteley
- Institute of Cardiovascular Sciences, Faculty of Medical and Human Sciences, University of Manchester, M13 9NT, UK
| | - Mohammad M Iqbal
- Institute of Cardiovascular Sciences, Faculty of Medical and Human Sciences, University of Manchester, M13 9NT, UK
| | - Ashraf Kitmitto
- Institute of Cardiovascular Sciences, Faculty of Medical and Human Sciences, University of Manchester, M13 9NT, UK.
| |
Collapse
|
18
|
Ashton AW, Le TYL, Gomez-Sanchez CE, Morel-Kopp MC, McWhinney B, Hudson A, Mihailidou AS. Role of Nongenomic Signaling Pathways Activated by Aldosterone During Cardiac Reperfusion Injury. Mol Endocrinol 2015; 29:1144-55. [PMID: 26121234 DOI: 10.1210/me.2014-1410] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Aldosterone (Aldo) activates both genomic and nongenomic signaling pathways in the cardiovascular system. Activation of genomic signaling pathways contributes to the adverse cardiac actions of Aldo during reperfusion injury; however, the extent nongenomic signaling pathways contribute has been difficult to identify due to lack of a specific ligand that activates only nongenomic signaling pathways. Using a pegylated aldosterone analog, aldosterone-3-carboxymethoxylamine-TFP ester conjugated to methoxypegylated amine (Aldo-PEG), we are able for the first time to distinguish between nongenomic and genomic cardiac actions of Aldo. We confirm Aldo-PEG activates phosphorylation of ERK1/2 in rat cardiomyocyte H9c2 cells similar to Aldo and G protein-coupled receptor 30 (GPR30 or GPER) agonist G1. GPER antagonist, G36, but not mineralocorticoid receptor (MR) antagonist spironolactone, prevented ERK1/2 phosphorylation by Aldo, Aldo-PEG, and G1. The selective nongenomic actions of Aldo-PEG are confirmed, with Aldo-PEG increasing superoxide production in H9c2 cells to similar levels as Aldo but having no effect on subcellular localization of MR. Striatin serves as a scaffold for GPER and MR, with GPER antagonist G36, but not spironolactone, restoring MR-striatin complexes. Aldo-PEG had no effect on MR-dependent transcriptional activation, whereas Aldo increased transcript levels of serum-regulated kinase 1 and plasminogen activator inhibitor-1. Using our ex vivo experimental rat model of myocardial infarction, we found aggravated infarct size and apoptosis by Aldo but not Aldo-PEG. Our studies confirm that in the heart, activation of nongenomic signaling pathways alone are not sufficient to trigger the deleterious effects of aldosterone during myocardial reperfusion injury.
Collapse
Affiliation(s)
- Anthony W Ashton
- Cardiovascular and Hormonal Research Laboratory, Department of Cardiology (T.Y.L.L., A.S.M.), Division of Perinatal Research (A.W.A.), Northern Blood Research Centre and Department of Haematology and Transfusion Medicine (M.-C.M.-K.), Sydney Neuro-Oncology Group and Bill Walsh Translational Cancer Research Laboratory (A.H.), Royal North Shore Hospital and Kolling Institute (A.W.A., T.Y.L.L., M.-C.M.-K., A.H., A.S.M.), Royal North Shore Hospital and The University of Sydney, Sydney 2065, Australia; Division of Endocrinology, G. V. (Sonny) Montgomery Veterans Affairs Medical Center and University of Mississippi Medical Center (C.E.G.-S.), Jackson, Mississippi 39216; and Analytical Chemistry Unit (B.M.), Pathology Queensland, Health Services Support Agency, Royal Brisbane and Women's Hospital, Brisbane, Queensland 4029, Australia
| | - Thi Y L Le
- Cardiovascular and Hormonal Research Laboratory, Department of Cardiology (T.Y.L.L., A.S.M.), Division of Perinatal Research (A.W.A.), Northern Blood Research Centre and Department of Haematology and Transfusion Medicine (M.-C.M.-K.), Sydney Neuro-Oncology Group and Bill Walsh Translational Cancer Research Laboratory (A.H.), Royal North Shore Hospital and Kolling Institute (A.W.A., T.Y.L.L., M.-C.M.-K., A.H., A.S.M.), Royal North Shore Hospital and The University of Sydney, Sydney 2065, Australia; Division of Endocrinology, G. V. (Sonny) Montgomery Veterans Affairs Medical Center and University of Mississippi Medical Center (C.E.G.-S.), Jackson, Mississippi 39216; and Analytical Chemistry Unit (B.M.), Pathology Queensland, Health Services Support Agency, Royal Brisbane and Women's Hospital, Brisbane, Queensland 4029, Australia
| | - Celso E Gomez-Sanchez
- Cardiovascular and Hormonal Research Laboratory, Department of Cardiology (T.Y.L.L., A.S.M.), Division of Perinatal Research (A.W.A.), Northern Blood Research Centre and Department of Haematology and Transfusion Medicine (M.-C.M.-K.), Sydney Neuro-Oncology Group and Bill Walsh Translational Cancer Research Laboratory (A.H.), Royal North Shore Hospital and Kolling Institute (A.W.A., T.Y.L.L., M.-C.M.-K., A.H., A.S.M.), Royal North Shore Hospital and The University of Sydney, Sydney 2065, Australia; Division of Endocrinology, G. V. (Sonny) Montgomery Veterans Affairs Medical Center and University of Mississippi Medical Center (C.E.G.-S.), Jackson, Mississippi 39216; and Analytical Chemistry Unit (B.M.), Pathology Queensland, Health Services Support Agency, Royal Brisbane and Women's Hospital, Brisbane, Queensland 4029, Australia
| | - Marie-Christine Morel-Kopp
- Cardiovascular and Hormonal Research Laboratory, Department of Cardiology (T.Y.L.L., A.S.M.), Division of Perinatal Research (A.W.A.), Northern Blood Research Centre and Department of Haematology and Transfusion Medicine (M.-C.M.-K.), Sydney Neuro-Oncology Group and Bill Walsh Translational Cancer Research Laboratory (A.H.), Royal North Shore Hospital and Kolling Institute (A.W.A., T.Y.L.L., M.-C.M.-K., A.H., A.S.M.), Royal North Shore Hospital and The University of Sydney, Sydney 2065, Australia; Division of Endocrinology, G. V. (Sonny) Montgomery Veterans Affairs Medical Center and University of Mississippi Medical Center (C.E.G.-S.), Jackson, Mississippi 39216; and Analytical Chemistry Unit (B.M.), Pathology Queensland, Health Services Support Agency, Royal Brisbane and Women's Hospital, Brisbane, Queensland 4029, Australia
| | - Brett McWhinney
- Cardiovascular and Hormonal Research Laboratory, Department of Cardiology (T.Y.L.L., A.S.M.), Division of Perinatal Research (A.W.A.), Northern Blood Research Centre and Department of Haematology and Transfusion Medicine (M.-C.M.-K.), Sydney Neuro-Oncology Group and Bill Walsh Translational Cancer Research Laboratory (A.H.), Royal North Shore Hospital and Kolling Institute (A.W.A., T.Y.L.L., M.-C.M.-K., A.H., A.S.M.), Royal North Shore Hospital and The University of Sydney, Sydney 2065, Australia; Division of Endocrinology, G. V. (Sonny) Montgomery Veterans Affairs Medical Center and University of Mississippi Medical Center (C.E.G.-S.), Jackson, Mississippi 39216; and Analytical Chemistry Unit (B.M.), Pathology Queensland, Health Services Support Agency, Royal Brisbane and Women's Hospital, Brisbane, Queensland 4029, Australia
| | - Amanda Hudson
- Cardiovascular and Hormonal Research Laboratory, Department of Cardiology (T.Y.L.L., A.S.M.), Division of Perinatal Research (A.W.A.), Northern Blood Research Centre and Department of Haematology and Transfusion Medicine (M.-C.M.-K.), Sydney Neuro-Oncology Group and Bill Walsh Translational Cancer Research Laboratory (A.H.), Royal North Shore Hospital and Kolling Institute (A.W.A., T.Y.L.L., M.-C.M.-K., A.H., A.S.M.), Royal North Shore Hospital and The University of Sydney, Sydney 2065, Australia; Division of Endocrinology, G. V. (Sonny) Montgomery Veterans Affairs Medical Center and University of Mississippi Medical Center (C.E.G.-S.), Jackson, Mississippi 39216; and Analytical Chemistry Unit (B.M.), Pathology Queensland, Health Services Support Agency, Royal Brisbane and Women's Hospital, Brisbane, Queensland 4029, Australia
| | - Anastasia S Mihailidou
- Cardiovascular and Hormonal Research Laboratory, Department of Cardiology (T.Y.L.L., A.S.M.), Division of Perinatal Research (A.W.A.), Northern Blood Research Centre and Department of Haematology and Transfusion Medicine (M.-C.M.-K.), Sydney Neuro-Oncology Group and Bill Walsh Translational Cancer Research Laboratory (A.H.), Royal North Shore Hospital and Kolling Institute (A.W.A., T.Y.L.L., M.-C.M.-K., A.H., A.S.M.), Royal North Shore Hospital and The University of Sydney, Sydney 2065, Australia; Division of Endocrinology, G. V. (Sonny) Montgomery Veterans Affairs Medical Center and University of Mississippi Medical Center (C.E.G.-S.), Jackson, Mississippi 39216; and Analytical Chemistry Unit (B.M.), Pathology Queensland, Health Services Support Agency, Royal Brisbane and Women's Hospital, Brisbane, Queensland 4029, Australia
| |
Collapse
|
19
|
Martín-Fernández B, de las Heras N, Valero-Muñoz M, Ballesteros S, Yao YZ, Stanton PG, Fuller PJ, Lahera V. Beneficial effects of proanthocyanidins in the cardiac alterations induced by aldosterone in rat heart through mineralocorticoid receptor blockade. PLoS One 2014; 9:e111104. [PMID: 25353961 PMCID: PMC4212985 DOI: 10.1371/journal.pone.0111104] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 09/26/2014] [Indexed: 01/01/2023] Open
Abstract
Aldosterone administration in rats results in several cardiac alterations. Previous studies have demonstrated that proanthocyanidins, phenolic bioactive compounds, have cardioprotective effects. We studied the potential beneficial effects of the proanthocyanidin-rich almond skin extract (PASE) on the cardiac alterations induced by aldosterone-salt treatment, their effects in mineralocorticoid receptor activity and we sought to confirm proanthocyanidins as the specific component of the extract involved in the beneficial cardiac effects. Male Wistar rats received aldosterone (1 mg/Kg/day) +1% NaCl for 3 weeks. Half of the animals in each group were simultaneously treated with either PASE (100 mg/Kg/day) or spironolactone (200 mg/Kg/day). The ability of PASE to act as an antagonist of the mineralocorticoid receptor was examined using a transactivation assay. High performance liquid chromatography was used to identify and to isolate proanthocyanidins. Hypertension and diastolic dysfunction induced by aldosterone were abolished by treatment with PASE. Expression of the aldosterone mediator SGK-1, together with fibrotic, inflammatory and oxidative mediators were increased by aldosterone-salt treatment; these were reduced by PASE. Aldosterone-salt induced transcriptional activity of the mineralocorticoid receptor was reduced by PASE. HPLC confirmed proanthocyanidins as the compound responsible for the beneficial effects of PASE. The effects of PASE were comparable to those seen with the mineralocorticoid antagonist, spironolactone. The observed responses in the aldosterone-salt treated rats together with the antagonism of transactivation at the mineralocorticoid receptor by PASE provides evidence that the beneficial effect of this proanthocyanidin-rich almond skin extract is via as a mineralocorticoid receptor antagonist with proanthocyanidins identified as the compounds responsible for the beneficial effects of PASE.
Collapse
Affiliation(s)
- Beatriz Martín-Fernández
- Department of Physiology, School of Medicine, Universidad Complutense, Madrid, Spain
- Prince Henry’s Institute of Medical Research, Clayton, Victoria, Australia
| | - Natalia de las Heras
- Department of Physiology, School of Medicine, Universidad Complutense, Madrid, Spain
| | - María Valero-Muñoz
- Department of Physiology, School of Medicine, Universidad Complutense, Madrid, Spain
| | - Sandra Ballesteros
- Department of Physiology, School of Medicine, Universidad Complutense, Madrid, Spain
| | - Yi-Zhou Yao
- Prince Henry’s Institute of Medical Research, Clayton, Victoria, Australia
| | - Peter G. Stanton
- Prince Henry’s Institute of Medical Research, Clayton, Victoria, Australia
| | - Peter J. Fuller
- Prince Henry’s Institute of Medical Research, Clayton, Victoria, Australia
| | - Vicente Lahera
- Department of Physiology, School of Medicine, Universidad Complutense, Madrid, Spain
| |
Collapse
|
20
|
Deliyanti D, Armani R, Casely D, Figgett WA, Agrotis A, Wilkinson-Berka JL. Retinal vasculopathy is reduced by dietary salt restriction: involvement of Glia, ENaCα, and the renin-angiotensin-aldosterone system. Arterioscler Thromb Vasc Biol 2014; 34:2033-41. [PMID: 25012132 DOI: 10.1161/atvbaha.114.303792] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
OBJECTIVE Neovascularization and vaso-obliteration are vision-threatening events that develop by interactions between retinal vascular and glial cells. A high-salt diet is causal in cardiovascular and renal disease, which is linked to modulation of the renin-angiotensin-aldosterone system. However, it is not known whether dietary salt influences retinal vasculopathy and if the renin-angiotensin-aldosterone system is involved. We examined whether a low-salt (LS) diet influenced vascular and glial cell injury and the renin-angiotensin-aldosterone system in ischemic retinopathy. APPROACH AND RESULTS Pregnant Sprague Dawley rats were fed LS (0.03% NaCl) or normal salt (0.3% NaCl) diets, and ischemic retinopathy was induced in the offspring. An LS diet reduced retinal neovascularization and vaso-obliteration, the mRNA and protein levels of the angiogenic factors, vascular endothelial growth factor, and erythropoietin. Microglia, which influence vascular remodeling in ischemic retinopathy, were reduced by LS as was tumor necrosis factor-α. Macroglial Müller cells maintain the integrity of the blood-retinal barrier, and in ischemic retinopathy, LS reduced their gliosis and also vascular leakage. In retina, LS reduced mineralocorticoid receptor, angiotensin type 1 receptor, and renin mRNA levels, whereas, as expected, plasma levels of aldosterone and renin were increased. The aldosterone/mineralocorticoid receptor-sensitive epithelial sodium channel alpha (ENaCα), which is expressed in Müller cells, was increased in ischemic retinopathy and reduced by LS. In cultured Müller cells, high salt increased ENaCα, which was prevented by mineralocorticoid receptor and angiotensin type 1 receptor blockade. Conversely, LS reduced ENaCα, angiotensin type 1 receptor, and mineralocorticoid receptor expression. CONCLUSIONS An LS diet reduced retinal vasculopathy, by modulating glial cell function and the retinal renin-angiotensin-aldosterone system.
Collapse
Affiliation(s)
- Devy Deliyanti
- From the Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia (D.D., R.A., W.A.F., A.A., J.L.W.-B.); and Prosearch International, Malvern, Victoria, Australia (D.C.)
| | - Roksana Armani
- From the Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia (D.D., R.A., W.A.F., A.A., J.L.W.-B.); and Prosearch International, Malvern, Victoria, Australia (D.C.)
| | - David Casely
- From the Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia (D.D., R.A., W.A.F., A.A., J.L.W.-B.); and Prosearch International, Malvern, Victoria, Australia (D.C.)
| | - William A Figgett
- From the Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia (D.D., R.A., W.A.F., A.A., J.L.W.-B.); and Prosearch International, Malvern, Victoria, Australia (D.C.)
| | - Alex Agrotis
- From the Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia (D.D., R.A., W.A.F., A.A., J.L.W.-B.); and Prosearch International, Malvern, Victoria, Australia (D.C.)
| | - Jennifer L Wilkinson-Berka
- From the Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia (D.D., R.A., W.A.F., A.A., J.L.W.-B.); and Prosearch International, Malvern, Victoria, Australia (D.C.).
| |
Collapse
|
21
|
Abstract
The primary adrenal cortical steroid hormones, aldosterone, and the glucocorticoids cortisol and corticosterone, act through the structurally similar mineralocorticoid (MR) and glucocorticoid receptors (GRs). Aldosterone is crucial for fluid, electrolyte, and hemodynamic homeostasis and tissue repair; the significantly more abundant glucocorticoids are indispensable for energy homeostasis, appropriate responses to stress, and limiting inflammation. Steroid receptors initiate gene transcription for proteins that effect their actions as well as rapid non-genomic effects through classical cell signaling pathways. GR and MR are expressed in many tissues types, often in the same cells, where they interact at molecular and functional levels, at times in synergy, others in opposition. Thus the appropriate balance of MR and GR activation is crucial for homeostasis. MR has the same binding affinity for aldosterone, cortisol, and corticosterone. Glucocorticoids activate MR in most tissues at basal levels and GR at stress levels. Inactivation of cortisol and corticosterone by 11β-HSD2 allows aldosterone to activate MR within aldosterone target cells and limits activation of the GR. Under most conditions, 11β-HSD1 acts as a reductase and activates cortisol/corticosterone, amplifying circulating levels. 11β-HSD1 and MR antagonists mitigate inappropriate activation of MR under conditions of oxidative stress that contributes to the pathophysiology of the cardiometabolic syndrome; however, MR antagonists decrease normal MR/GR functional interactions, a particular concern for neurons mediating cognition, memory, and affect.
Collapse
Affiliation(s)
- Elise Gomez-Sanchez
- G.V.(Sonny) Montgomery V.A. Medical Center and Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| | - Celso E. Gomez-Sanchez
- G.V.(Sonny) Montgomery V.A. Medical Center and Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| |
Collapse
|
22
|
Coutinho P, Vega C, Pojoga LH, Rivera A, Prado GN, Yao TM, Adler G, Torres-Grajales M, Maldonado ER, Ramos-Rivera A, Williams JS, Williams G, Romero JR. Aldosterone's rapid, nongenomic effects are mediated by striatin: a modulator of aldosterone's effect on estrogen action. Endocrinology 2014; 155:2233-43. [PMID: 24654783 PMCID: PMC4020933 DOI: 10.1210/en.2013-1834] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The cellular responses to steroids are mediated by 2 general mechanisms: genomic and rapid/nongenomic effects. Identification of the mechanisms underlying aldosterone (ALDO)'s rapid vs their genomic actions is difficult to study, and these mechanisms are not clearly understood. Recent data suggest that striatin is a mediator of nongenomic effects of estrogen. We explored the hypothesis that striatin is an intermediary of the rapid/nongenomic effects of ALDO and that striatin serves as a novel link between the actions of the mineralocorticoid and estrogen receptors. In human and mouse endothelial cells, ALDO promoted an increase in phosphorylated extracellular signal-regulated protein kinases 1/2 (pERK) that peaked at 15 minutes. In addition, we found that striatin is a critical intermediary in this process, because reducing striatin levels with small interfering RNA (siRNA) technology prevented the rise in pERK levels. In contrast, reducing striatin did not significantly affect 2 well-characterized genomic responses to ALDO. Down-regulation of striatin with siRNA produced similar effects on estrogen's actions, reducing nongenomic, but not some genomic, actions. ALDO, but not estrogen, increased striatin levels. When endothelial cells were pretreated with ALDO, the rapid/nongenomic response to estrogen on phosphorylated endothelial nitric oxide synthase (peNOS) was enhanced and accelerated significantly. Importantly, pretreatment with estrogen did not enhance ALDO's nongenomic response on pERK. In conclusion, our results indicate that striatin is a novel mediator for both ALDO's and estrogen's rapid and nongenomic mechanisms of action on pERK and phosphorylated eNOS, respectively, thereby suggesting a unique level of interactions between the mineralocorticoid receptor and the estrogen receptor in the cardiovascular system.
Collapse
Affiliation(s)
- Patricia Coutinho
- Division of Endocrinology, Diabetes and Hypertension (P.C., C.V., L.H.P., G.N.P., T.M.Y., G.A., M.T.-G., E.R.M., A.R.-R., J.S.W., G.W., J.R.R.), Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, and Department of Laboratory Medicine (C.V., A.R., G.N.P., E.R.M.), Boston Children's Hospital and Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Kotliar C, Kempny P, Gonzalez S, Castellaro C, Forcada P, Obregon S, Cavanagh E, Chiabaut Svane J, Casarini MJ, Rojas M, Inserra F. Lack of RAAS inhibition by high-salt intake is associated with arterial stiffness in hypertensive patients. J Renin Angiotensin Aldosterone Syst 2014; 15:498-504. [DOI: 10.1177/1470320313503692] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Carol Kotliar
- Centre of Hypertension, Cardiology Service, Hospital Universitario Austral, Argentina
| | - Pablo Kempny
- Centre of Hypertension, Cardiology Service, Hospital Universitario Austral, Argentina
| | - Sergio Gonzalez
- Centre of Hypertension, Cardiology Service, Hospital Universitario Austral, Argentina
| | - Carlos Castellaro
- Centre of Hypertension, Cardiology Service, Hospital Universitario Austral, Argentina
| | - Pedro Forcada
- Centre of Hypertension, Cardiology Service, Hospital Universitario Austral, Argentina
| | - Sebastián Obregon
- Centre of Hypertension, Cardiology Service, Hospital Universitario Austral, Argentina
| | - Elena Cavanagh
- Biomedical School of Medicine, Universidad Austral, Argentina
| | - Jorge Chiabaut Svane
- Centre of Hypertension, Cardiology Service, Hospital Universitario Austral, Argentina
| | - Maria Jesus Casarini
- Centre of Hypertension, Cardiology Service, Hospital Universitario Austral, Argentina
| | - Mercedes Rojas
- Biochemical Central Laboratory, Hospital Universitario Austral, Argentina
| | - Felipe Inserra
- Biomedical School of Medicine, Universidad Austral, Argentina
| |
Collapse
|
24
|
Baudrand R, Campino C, Carvajal CA, Olivieri O, Guidi G, Faccini G, Vöhringer PA, Cerda J, Owen G, Kalergis AM, Fardella CE. High sodium intake is associated with increased glucocorticoid production, insulin resistance and metabolic syndrome. Clin Endocrinol (Oxf) 2014; 80:677-84. [PMID: 23594269 DOI: 10.1111/cen.12225] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 12/27/2012] [Accepted: 04/11/2013] [Indexed: 01/27/2023]
Abstract
OBJECTIVE High sodium (HS) diet is associated with hypertension (HT) and insulin resistance (IR). We evaluated whether HS diet was associated with a dysregulation of cortisol production and metabolic syndrome (MetS). PATIENTS AND MEASUREMENTS We recruited 370 adults (18-85 years, BMI 29·3 ± 4·4 kg/m(2) , 70% women, 72% HT, 61% MetS). HS diet (urinary sodium >150 mEq/day) was observed in 70% of subjects. We measured plasma hormones, lipid profile, urinary free cortisol (UFC) and cortisol tetrahydrometabolites (THM). RESULTS Urinary sodium was correlated with UFC (r = +0·45, P < 0·001), cortisol THM (r = +0·41, P < 0·001) and inversely with adiponectin, HDL and aldosterone, after adjusting by age, gender and BMI. Subjects with high, compared with adequate sodium intake (50-149 mEq/day) had higher UFC (P < 0·001), THM (P < 0·001), HOMA-IR (P = 0·04), HT (81% vs 50%, P < 0·001), MetS (69% vs 41%, P < 0·001) and lower adiponectin (P = 0·003). A multivariate predictive model adjusted by confounders showed a high discriminative capacity for MetS (ROC curve 0·878) using four clinical variables: HS intake [OR = 5·6 (CI 2·3-15·3)], HOMA-IR [OR 1·7 (1·3-2·2)] cortisol THM [OR 1·2 (1·1-1·4)] and adiponectin [OR = 0·9 (0·8-0·9)], the latter had a protective effect. CONCLUSIONS High sodium diet was associated with increased urinary cortisol and its metabolites. Also, HS diet was associated with HT, insulin resistance, dyslipidaemia and hypoadiponectinaemia, even when adjusting by confounding variables. Further, we observed that high salt intake, IR and higher cortisol metabolites, alone or combined in a clinical simple model, accurately predicted MetS status, suggesting an additive mechanism in obesity-related metabolic disorders.
Collapse
Affiliation(s)
- R Baudrand
- Department of Endocrinology, School of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Hwang J, Pallas DC. STRIPAK complexes: structure, biological function, and involvement in human diseases. Int J Biochem Cell Biol 2014; 47:118-48. [PMID: 24333164 PMCID: PMC3927685 DOI: 10.1016/j.biocel.2013.11.021] [Citation(s) in RCA: 170] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Revised: 11/18/2013] [Accepted: 11/28/2013] [Indexed: 12/31/2022]
Abstract
The mammalian striatin family consists of three proteins, striatin, S/G2 nuclear autoantigen, and zinedin. Striatin family members have no intrinsic catalytic activity, but rather function as scaffolding proteins. Remarkably, they organize multiple diverse, large signaling complexes that participate in a variety of cellular processes. Moreover, they appear to be regulatory/targeting subunits for the major eukaryotic serine/threonine protein phosphatase 2A. In addition, striatin family members associate with germinal center kinase III kinases as well as other novel components, earning these assemblies the name striatin-interacting phosphatase and kinase (STRIPAK) complexes. Recently, there has been a great increase in functional and mechanistic studies aimed at identifying and understanding the roles of STRIPAK and STRIPAK-like complexes in cellular processes of multiple organisms. These studies have identified novel STRIPAK and STRIPAK-like complexes and have explored their roles in specific signaling pathways. Together, the results of these studies have sparked increased interest in striatin family complexes because they have revealed roles in signaling, cell cycle control, apoptosis, vesicular trafficking, Golgi assembly, cell polarity, cell migration, neural and vascular development, and cardiac function. Moreover, STRIPAK complexes have been connected to clinical conditions, including cardiac disease, diabetes, autism, and cerebral cavernous malformation. In this review, we discuss the expression, localization, and protein domain structure of striatin family members. Then we consider the diverse complexes these proteins and their homologs form in various organisms, emphasizing what is known regarding function and regulation. Finally, we explore possible roles of striatin family complexes in disease, especially cerebral cavernous malformation.
Collapse
Affiliation(s)
- Juyeon Hwang
- Department of Biochemistry and Winship Cancer Institute, and Biochemistry, Cell, Developmental Biology Graduate Program, Emory University School of Medicine, 1510 Clifton Road, Atlanta, GA 30322, USA.
| | - David C Pallas
- Department of Biochemistry and Winship Cancer Institute, and Biochemistry, Cell, Developmental Biology Graduate Program, Emory University School of Medicine, 1510 Clifton Road, Atlanta, GA 30322, USA.
| |
Collapse
|
26
|
|
27
|
Baudrand R, Lian CG, Lian BQ, Ricchiuti V, Yao TM, Li J, Williams GH, Adler GK. Long-term dietary sodium restriction increases adiponectin expression and ameliorates the proinflammatory adipokine profile in obesity. Nutr Metab Cardiovasc Dis 2014; 24:34-41. [PMID: 24418377 PMCID: PMC4405158 DOI: 10.1016/j.numecd.2013.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 07/08/2013] [Accepted: 07/25/2013] [Indexed: 01/08/2023]
Abstract
BACKGROUND/AIM Obesity is associated with changes in adiponectin and pro-inflammatory adipokines. Sodium intake can affect adipokine secretion suggesting a role in cardiovascular dysfunction. We tested if long-term dietary sodium restriction modifies the expression of adiponectin and ameliorates the pro-inflammatory profile of obese, diabetic mice. METHODS/RESULTS Db/db mice were randomized to high sodium (HS 1.6% Na+, n = 6) or low sodium (LS 0.03% Na+, n = 8) diet for 16 weeks and compared with lean, db/+ mice on HS diet (n = 8). Insulin levels were 50% lower in the db/db mice on LS diet when compared with HS db/db (p < 0.05). LS diet increased cardiac adiponectin mRNA levels in db/db mice by 5-fold when compared with db/db mice on HS diet and by 2-fold when compared with HS lean mice (both p < 0.01). LS diet increased adiponectin in adipose tissue compared with db/db mice on HS diet, achieving levels similar to those of lean mice. MCP-1, IL-6 and TNF-α expression were reduced more than 50% in adipose tissue of db/db mice on LS diet when compared with HS db/db mice (all p < 0.05), to levels observed in the HS lean mice. Further, LS db/db mice had significantly reduced circulating MCP-1 and IL-6 levels when compared with HS db/db mice (both p < 0.01). CONCLUSION In obese-diabetic mice, long-term LS diet increases adiponectin in heart and adipose tissue and reduces pro-inflammatory factors in adipose tissue and plasma. These additive mechanisms may contribute to the potential cardioprotective benefits of LS diet in obesity-related metabolic disorders.
Collapse
Affiliation(s)
- R Baudrand
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Avenue, Boston, MA 02115, USA; Department of Endocrinology, School of Medicine, Pontificia Universidad Catolica de Chile, Santiago 8330074, Chile
| | - C G Lian
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Avenue, Boston, MA 02115, USA; Division of Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - B Q Lian
- Department of Medicine, University of Massachusetts, Worcester, MA 01605, USA
| | - V Ricchiuti
- Department of Pathology and Medicine, University of Cincinnati, Cincinnati, OH 45219, USA
| | - T M Yao
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Avenue, Boston, MA 02115, USA
| | - J Li
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Avenue, Boston, MA 02115, USA
| | - G H Williams
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Avenue, Boston, MA 02115, USA
| | - G K Adler
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Avenue, Boston, MA 02115, USA.
| |
Collapse
|
28
|
Abstract
PURPOSE OF REVIEW Aldosterone is now recognized as an increasingly important contributor to cardiometabolic pathology via inflammatory and fibrosis-related pathways in addition to its classically described role in sodium and volume regulation. Consequently, much effort has been directed towards characterizing the molecular pathways involved in aldosterone-mediated fibrosis and inflammation. What was once viewed as straightforward steroid hormone biology is now appreciated as a highly complex and tightly regulated series of pathways and interactions. These recognitions have fuelled a multidisciplinary effort to identify precisely how aldosterone mediates intracellular activation of both genomic (latent) and nongenomic (rapid) mechanisms of influence. This review will explore recent novel pathways regulating aldosterone action, focusing on the nongenomic pathways. RECENT FINDINGS Several recent discoveries have redefined our understanding of aldosterone interactions at the cellular level. This includes activation of the mineralocorticoid receptor at the plasma membrane instead of via classical nuclear hormone receptor interaction, and identification of novel cofactor scaffolding proteins that modify aldosterone influence at the cellular level. In addition, aldosterone activation of secondary messenger system cascades can occur directly and independent of mineralocorticoid receptor interaction. SUMMARY Substantial progress in detailing the molecular biology of aldosterone regulation and action should facilitate study of how it exerts detrimental effects in cardiometabolic diseases. However, to date, the clinical impact of these discoveries has not been validated. Translational efforts are now required to determine if novel therapeutic targets can be developed.
Collapse
Affiliation(s)
- Jonathan S Williams
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital/Harvard Medical School, Boston, MA 02115, USA.
| |
Collapse
|
29
|
Seto SW, Krishna SM, Yu H, Liu D, Khosla S, Golledge J. Impaired acetylcholine-induced endothelium-dependent aortic relaxation by caveolin-1 in angiotensin II-infused apolipoprotein-E (ApoE-/-) knockout mice. PLoS One 2013; 8:e58481. [PMID: 23469284 PMCID: PMC3587590 DOI: 10.1371/journal.pone.0058481] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 02/05/2013] [Indexed: 11/26/2022] Open
Abstract
Objective The angiotensin II (AngII)-infused apolipoprotein E-deficient (ApoE−/−) mouse model is widely used to study atherosclerosis and abdominal aortic aneurysm. An increase in blood pressure has been reported in this model however the underlying mechanism has not been fully explored. In this study, we investigated whether vasomotor dysfunction develops in AngII-infused ApoE−/− mice and the underlying mechanism involved. Methods ApoE−/− mice were infused with vehicle (distilled water) or AngII subcutaneously for 14 days. Blood pressure and heart rate were measured using the non-invasive tail cuff method. Aortic vascular reactivity and expression of key proteins (endothelial nitric oxide synthase (eNOS), phospho-eNOS and caveolin-1) were assessed using tension myography and Western blotting respectively. Plasma nitric oxide (NO) level was estimated using a colorimetric assay. Results AngII infusion caused a time-dependent increase in blood pressure (P<0.001). Aortas from AngII-infused mice were significantly less responsive to acetylcholine-induced endothelium-dependent relaxation when compared to aortas from mice infused with vehicle control (P<0.05). Contractile responses to phenylephrine (P<0.01) and potassium chloride (P<0.001) were significantly enhanced in aortas from AngII-infused mice. eNOS phosphorylation was significantly decreased in the aorta of AngII-infused mice (P<0.05). Aortic caveolin-1 protein expression was significantly increased in AngII-infused mice (P<0.05). Plasma nitrate/nitrite level was significantly reduced in AngII-infused mice (P<0.05). Pharmacological disruption of caveolae using methyl-β-cyclodextrin (MβCD) in isolated aortas from AngII-infused mice caused a significant leftward shift of the acetylcholine-induced relaxation concentration-response curve when compared to vehicle control (P<0.05). Conclusion Upregulation of caveolin-1 protein expression and reduced NO bioavailability contributes to aortic endothelial dysfunction in AngII-infused ApoE−/− mice.
Collapse
Affiliation(s)
- Sai Wang Seto
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, School of Medicine and Dentistry, James Cook University, Townsville, Queensland, Australia
| | - Smriti M. Krishna
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, School of Medicine and Dentistry, James Cook University, Townsville, Queensland, Australia
| | - Hongyou Yu
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, School of Medicine and Dentistry, James Cook University, Townsville, Queensland, Australia
| | - David Liu
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, School of Medicine and Dentistry, James Cook University, Townsville, Queensland, Australia
| | - Surabhi Khosla
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, School of Medicine and Dentistry, James Cook University, Townsville, Queensland, Australia
| | - Jonathan Golledge
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, School of Medicine and Dentistry, James Cook University, Townsville, Queensland, Australia
- * E-mail:
| |
Collapse
|