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Cabrera JT, Si R, Tsuji-Hosokawa A, Cai H, Yuan JXJ, Dillmann WH, Makino A. Restoration of coronary microvascular function by OGA overexpression in a high-fat diet with low-dose streptozotocin-induced type 2 diabetic mice. Diab Vasc Dis Res 2023; 20:14791641231173630. [PMID: 37186669 PMCID: PMC10196148 DOI: 10.1177/14791641231173630] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/17/2023] Open
Abstract
Sustained hyperglycemia results in excess protein O-GlcNAcylation, leading to vascular complications in diabetes. This study aims to investigate the role of O-GlcNAcylation in the progression of coronary microvascular disease (CMD) in inducible type 2 diabetic (T2D) mice generated by a high-fat diet with a single injection of low-dose streptozotocin. Inducible T2D mice exhibited an increase in protein O-GlcNAcylation in cardiac endothelial cells (CECs) and decreases in coronary flow velocity reserve (CFVR, an indicator of coronary microvascular function) and capillary density accompanied by increased endothelial apoptosis in the heart. Endothelial-specific O-GlcNAcase (OGA) overexpression significantly lowered protein O-GlcNAcylation in CECs, increased CFVR and capillary density, and decreased endothelial apoptosis in T2D mice. OGA overexpression also improved cardiac contractility in T2D mice. OGA gene transduction augmented angiogenic capacity in high-glucose treated CECs. PCR array analysis revealed that seven out of 92 genes show significant differences among control, T2D, and T2D + OGA mice, and Sp1 might be a great target for future study, the level of which was significantly increased by OGA in T2D mice. Our data suggest that reducing protein O-GlcNAcylation in CECs has a beneficial effect on coronary microvascular function, and OGA is a promising therapeutic target for CMD in diabetic patients.
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Affiliation(s)
- Jody Tori Cabrera
- Department of Medicine, University of California, San
Diego, La Jolla, CA, USA
| | - Rui Si
- Department of Physiology, The University of
Arizona, Tucson, AZ, USA
- Department of Cardiology, Xijing
Hospital, Fourth Military Medical
University, Shaanxi, China
| | | | - Hua Cai
- Department of Anesthesiology, University of California, Los
Angeles, Los Angeles, CA, USA
| | - Jason X-J Yuan
- Department of Medicine, University of California, San
Diego, La Jolla, CA, USA
| | - Wolfgang H Dillmann
- Department of Medicine, University of California, San
Diego, La Jolla, CA, USA
| | - Ayako Makino
- Department of Medicine, University of California, San
Diego, La Jolla, CA, USA
- Department of Physiology, The University of
Arizona, Tucson, AZ, USA
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2
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Loss of secretin results in systemic and pulmonary hypertension with cardiopulmonary pathologies in mice. Sci Rep 2019; 9:14211. [PMID: 31578376 PMCID: PMC6775067 DOI: 10.1038/s41598-019-50634-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 08/23/2019] [Indexed: 12/16/2022] Open
Abstract
More than 1 billion people globally are suffering from hypertension, which is a long-term incurable medical condition that can further lead to dangerous complications and death if left untreated. In earlier studies, the brain-gut peptide secretin (SCT) was found to be able to control blood pressure by its cardiovascular and pulmonary effects. For example, serum SCT in patients with congestive heart failure was one-third of the normal level. These observations strongly suggest that SCT has a causal role in blood pressure control, and in this report, we used constitutive SCT knockout (SCT−/−) mice and control C57BL/6N mice to investigate differences in the morphology, function, underlying mechanisms and response to SCT treatment. We found that SCT−/− mice suffer from systemic and pulmonary hypertension with increased fibrosis in the lungs and heart. Small airway remodelling and pulmonary inflammation were also found in SCT−/− mice. Serum NO and VEGF levels were reduced and plasma aldosterone levels were increased in SCT−/− mice. Elevated cardiac aldosterone and decreased VEGF in the lungs were observed in the SCT−/− mice. More interestingly, SCT replacement in SCT−/− mice could prevent the development of heart and lung pathologies compared to the untreated group. Taken together, we comprehensively demonstrated the critical role of SCT in the cardiovascular and pulmonary systems and provide new insight into the potential role of SCT in the pathological development of cardiopulmonary and cardiovascular diseases.
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3
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Sadek NB, Gamal SM, Aboulhoda BE, Rashed LA, Shawky HM, Gamal El-Din MM. The Potential Role of Undercarboxylated Osteocalcin Upregulation in Microvascular Insufficiency in a Rat Model of Diabetic Cardiomyopathy. J Cardiovasc Pharmacol Ther 2019; 25:86-97. [PMID: 31533469 DOI: 10.1177/1074248419876632] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Diabetic cardiomyopathy (DCM) is accompanied by microvascular complications that lead to myocardial dysfunction and heart failure. Most conventional therapies cannot ameliorate the microvascular insufficiency in DCM. In this study, we tested the hypothesis that undercarboxylated osteocalcin (ucOC) may be a new adjuvant therapy against the progression of DCM and its underlying microvascular pathology. MATERIALS AND METHODS Diabetes was induced in Wistar rats with a high-fat diet combined with streptozotocin injections, and ucOC was upregulated after warfarin administration in the treated group. After 8 weeks, cardiac functions were assessed using a Langendorff apparatus. Cardiac tissue samples were also extracted to assess the ucOC receptor and vascular endothelial growth factor (VEGF) for histopathological studies. RESULTS Both the systolic and the diastolic dysfunction observed in the DCM group were significantly improved after the increase in ucOC blood levels. Significant improvement in VEGF and CD31 expression after warfarin injection was associated with increased capillary density, neovascularization, and decreased myocardial fibrosis together with the reestablishment of myocardial structural and ultrastructural patterns. CONCLUSION Undercarboxylated osteocalcin may have a promising effect in improving microvascular insufficiency and myocardial dysfunction in DCM.
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Affiliation(s)
- Nermeen B Sadek
- Faculty of Medicine, Department of Physiology, Cairo University, Cairo, Egypt
| | - Sarah M Gamal
- Faculty of Medicine, Department of Physiology, Cairo University, Cairo, Egypt
| | - Basma E Aboulhoda
- Faculty of Medicine, Department of Anatomy and Embryology, Cairo University, Cairo, Egypt
| | - Laila A Rashed
- Faculty of Medicine, Department of Biochemistry, Cairo University, Cairo, Egypt
| | - Heba M Shawky
- Faculty of Medicine, Department of Physiology, Cairo University, Cairo, Egypt
| | - Maha M Gamal El-Din
- Faculty of Medicine, Department of Physiology, Cairo University, Cairo, Egypt
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4
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Lother A, Deng L, Huck M, Fürst D, Kowalski J, Esser JS, Moser M, Bode C, Hein L. Endothelial cell mineralocorticoid receptors oppose VEGF-induced gene expression and angiogenesis. J Endocrinol 2019; 240:15-26. [PMID: 30400069 DOI: 10.1530/joe-18-0494] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 09/24/2018] [Indexed: 12/29/2022]
Abstract
Aldosterone is a key factor in adverse cardiovascular remodeling by acting on the mineralocorticoid receptor (MR) in different cell types. Endothelial MR activation mediates hypertrophy, inflammation and fibrosis. Cardiovascular remodeling is often accompanied by impaired angiogenesis, which is a risk factor for the development of heart failure. In this study, we evaluated the impact of MR in endothelial cells on angiogenesis. Deoxycorticosterone acetate (DOCA)-induced hypertension was associated with capillary rarefaction in the heart of WT mice but not of mice with cell type-specific MR deletion in endothelial cells. Consistently, endothelial MR deletion prevented the inhibitory effect of aldosterone on the capillarization of subcutaneously implanted silicon tubes and on capillary sprouting from aortic ring segments. We examined MR-dependent gene expression in cultured endothelial cells by RNA-seq and identified a cluster of differentially regulated genes related to angiogenesis. We found opposing effects on gene expression when comparing activation of the mineralocorticoid receptor in ECs to treatment with vascular endothelial growth factor (VEGF), a potent activator of angiogenesis. In conclusion, we demonstrate here that activation of endothelial cell MR impaired angiogenic capacity and lead to capillary rarefaction in a mouse model of MR-driven hypertension. MR activation opposed VEGF-induced gene expression leading to the dysregulation of angiogenesis-related gene networks in endothelial cells. Our findings underscore the pivotal role of endothelial cell MR in the pathophysiology of hypertension and related heart disease.
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Affiliation(s)
- Achim Lother
- A Lother, Institute of experimental and clinical Pharmacology and Toxicology, University of Freiburg, Freiburg, Germany
| | - Lisa Deng
- L Deng, Institute of experimental and clinical Pharmacology and Toxicology, University of Freiburg, Freiburg, Germany
| | - Michael Huck
- M Huck, Institute of experimental and clinical Pharmacology and Toxicology, University of Freiburg, Freiburg, Germany
| | - David Fürst
- D Fürst, Institute of experimental and clinical Pharmacology and Toxicology, University of Freiburg, Freiburg, Germany
| | - Jessica Kowalski
- J Kowalski, Institute of experimental and clinical Pharmacology and Toxicology, University of Freiburg, Freiburg, Germany
| | - Jennifer Susanne Esser
- J Esser, Heart Center, Cardiology and Angiology I, University of Freiburg, Freiburg, Germany
| | - Martin Moser
- M Moser, Heart Center, Cardiology and Angiology I, University of Freiburg, Freiburg, Germany
| | - Christoph Bode
- C Bode, Heart Center, Cardiology and Angiology I, University of Freiburg, Freiburg, Germany
| | - Lutz Hein
- L Hein, Institute of experimental and clinical Pharmacology and Toxicology, University of Freiburg, Freiburg, Germany
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5
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Willson C, Watanabe M, Tsuji-Hosokawa A, Makino A. Pulmonary vascular dysfunction in metabolic syndrome. J Physiol 2018; 597:1121-1141. [PMID: 30125956 DOI: 10.1113/jp275856] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 07/30/2018] [Indexed: 12/20/2022] Open
Abstract
Metabolic syndrome is a critically important precursor to the onset of many diseases, such as cardiovascular disease, and cardiovascular disease is the leading cause of death worldwide. The primary risk factors of metabolic syndrome include hyperglycaemia, abdominal obesity, dyslipidaemia, and high blood pressure. It has been well documented that metabolic syndrome alters vascular endothelial and smooth muscle cell functions in the heart, brain, kidney and peripheral vessels. However, there is less information available regarding how metabolic syndrome can affect pulmonary vascular function and ultimately increase an individual's risk of developing various pulmonary vascular diseases, such as pulmonary hypertension. Here, we review in detail how metabolic syndrome affects pulmonary vascular function.
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Affiliation(s)
- Conor Willson
- Department of Physiology, University of Arizona, Tucson, AZ, USA
| | - Makiko Watanabe
- Department of Physiology, University of Arizona, Tucson, AZ, USA
| | | | - Ayako Makino
- Department of Physiology, University of Arizona, Tucson, AZ, USA
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6
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Caillard A, Sadoune M, Cescau A, Meddour M, Gandon M, Polidano E, Delcayre C, Da Silva K, Manivet P, Gomez AM, Cohen-Solal A, Vodovar N, Li Z, Mebazaa A, Samuel JL. QSOX1, a novel actor of cardiac protection upon acute stress in mice. J Mol Cell Cardiol 2018; 119:75-86. [DOI: 10.1016/j.yjmcc.2018.04.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/07/2018] [Accepted: 04/27/2018] [Indexed: 12/31/2022]
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7
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Rednam CK, Wilson RL, Selvaraju V, Rishi MT, Thirunavukkarasu M, Coca-Soliz V, Lakshmanan R, Palesty JA, McFadden DW, Maulik N. Increased survivability of ischemic skin flap tissue in Flk-1 +/- mice by Pellino-1 intervention. Microcirculation 2018; 24. [PMID: 28177171 DOI: 10.1111/micc.12362] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 02/03/2017] [Indexed: 01/12/2023]
Abstract
OBJECTIVE Reduced skin flap survival due to ischemia is a serious concern during reconstructive cosmetic surgery. The absence of VEGF and its receptors during ischemia may lead to flap failure. We identified Peli1, a 46-kDa protein, as a proangiogenic molecule and is directly regulated by VEGF. Therefore, we hypothesized that Peli1 acts downstream of Flk-1/VEGFR2 and aids in skin flap survival during ischemia. METHODS Scratch and matrigel assays were performed to observe cell proliferation, migration, and tube formation in vitro. Western blot analysis was carried out to detect the phosphorylation of Akt (p-Akt) and MAPKAPK2 (p-MK2) in HUVECs. The translational potential of Peli1 pretreatment in the rescue of skin flap tissue was studied in vivo using Flk-1+/- mice. Animals underwent dorsal ischemic skin flap surgery, and the tissue was collected on day 12 for analysis. RESULTS Western blot analysis revealed a direct relationship between Peli1 and VEGF, as demonstrated by loss-of-function and gain-of-function studies. In addition, pretreatment with Ad.Peli1 restored the phosphorylation of Akt and MK2 and improved the migration potential of Flk-1-knockdown cells. Ad.Peli1 pretreatment salvaged the ischemic skin flap of Flk-1+/- mice by increasing blood perfusion and reducing the inflammatory response and the extent of necrosis. CONCLUSION Our findings reveal that Peli1 is a proangiogenic molecule that acts downstream of VEGF-Flk-1 and restores angiogenesis and enhances skin flap survivability.
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Affiliation(s)
- Chandra K Rednam
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT, USA
| | - Rickesha L Wilson
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT, USA
| | - Vaithinathan Selvaraju
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT, USA
| | - Muhammad T Rishi
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT, USA.,Stanley J. Dudrick, Department of Surgery, Saint Mary's Hospital, Waterbury, CT, USA
| | - Mahesh Thirunavukkarasu
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT, USA
| | - Vladimir Coca-Soliz
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT, USA.,Stanley J. Dudrick, Department of Surgery, Saint Mary's Hospital, Waterbury, CT, USA
| | - Rajesh Lakshmanan
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT, USA
| | - John A Palesty
- Stanley J. Dudrick, Department of Surgery, Saint Mary's Hospital, Waterbury, CT, USA
| | - David W McFadden
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT, USA
| | - Nilanjana Maulik
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT, USA
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8
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Pan M, Han Y, Basu A, Dai A, Si R, Willson C, Balistrieri A, Scott BT, Makino A. Overexpression of hexokinase 2 reduces mitochondrial calcium overload in coronary endothelial cells of type 2 diabetic mice. Am J Physiol Cell Physiol 2018. [PMID: 29513568 DOI: 10.1152/ajpcell.00350.2017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Coronary microvascular rarefaction, due to endothelial cell (EC) dysfunction, is one of the causes of increased morbidity and mortality in diabetes. Coronary ECs in diabetes are more apoptotic due partly to mitochondrial calcium overload. This study was designed to investigate the role of hexokinase 2 (HK2, an endogenous inhibitor of voltage-dependent anion channel) in coronary endothelial dysfunction in type 2 diabetes. We used mouse coronary ECs (MCECs) isolated from type 2 diabetic mice and human coronary ECs (HCECs) from type 2 diabetic patients to examine protein levels and mitochondrial function. ECs were more apoptotic and capillary density was lower in the left ventricle of diabetic mice than the control. MCECs from diabetic mice exhibited significant increase in mitochondrial Ca2+ concentration ([Ca2+]mito) compared with the control. Among several regulatory proteins for [Ca2+]mito, hexokinase 1 (HK1) and HK2 were significantly lower in MCECs from diabetic mice than control MCECs. We also found that the level of HK2 ubiquitination was higher in MCECs from diabetic mice than in control MCECs. In line with the data from MCECs, HCECs from diabetic patients showed lower HK2 protein levels than HCECs from nondiabetic patients. High-glucose treatment, but not high-fat treatment, significantly decreased HK2 protein levels in MCECs. HK2 overexpression in MCECs of diabetic mice not only lowered the level of [Ca2+]mito, but also reduced mitochondrial reactive oxygen species production toward the level seen in control MCECs. These data suggest that HK2 is a potential therapeutic target for coronary microvascular disease in diabetes by restoring mitochondrial function in coronary ECs.
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Affiliation(s)
- Minglin Pan
- Department of Medicine, University of Illinois at Chicago , Chicago, Illinois.,The Second Affiliated Hospital of Nanjing Medical University , Nanjing , China
| | - Ying Han
- Department of Physiology, University of Arizona , Tucson, Arizona.,Department of Medicine, University of Illinois at Chicago , Chicago, Illinois
| | - Aninda Basu
- Department of Medicine, University of Illinois at Chicago , Chicago, Illinois
| | - Anzhi Dai
- Department of Medicine, University of Illinois at Chicago , Chicago, Illinois
| | - Rui Si
- Department of Physiology, University of Arizona , Tucson, Arizona
| | - Conor Willson
- Department of Physiology, University of Arizona , Tucson, Arizona
| | - Angela Balistrieri
- Department of Physiology, University of Arizona , Tucson, Arizona.,Department of Pharmacology, University of California, San Diego, La Jolla, California
| | - Brian T Scott
- Department of Medicine, University of California, San Diego, La Jolla, California
| | - Ayako Makino
- Department of Physiology, University of Arizona , Tucson, Arizona.,Department of Medicine, University of Arizona , Tucson, Arizona.,Department of Medicine, University of Illinois at Chicago , Chicago, Illinois
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9
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Jaisser F, Farman N. Emerging Roles of the Mineralocorticoid Receptor in Pathology: Toward New Paradigms in Clinical Pharmacology. Pharmacol Rev 2016; 68:49-75. [PMID: 26668301 DOI: 10.1124/pr.115.011106] [Citation(s) in RCA: 197] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The mineralocorticoid receptor (MR) and its ligand aldosterone are the principal modulators of hormone-regulated renal sodium reabsorption. In addition to the kidney, there are several other cells and organs expressing MR, in which its activation mediates pathologic changes, indicating potential therapeutic applications of pharmacological MR antagonism. Steroidal MR antagonists have been used for decades to fight hypertension and more recently heart failure. New therapeutic indications are now arising, and nonsteroidal MR antagonists are currently under development. This review is focused on nonclassic MR targets in cardiac, vascular, renal, metabolic, ocular, and cutaneous diseases. The MR, associated with other risk factors, is involved in organ fibrosis, inflammation, oxidative stress, and aging; for example, in the kidney and heart MR mediates hormonal tissue-specific ion channel regulation. Genetic and epigenetic modifications of MR expression/activity that have been documented in hypertension may also present significant risk factors in other diseases and be susceptible to MR antagonism. Excess mineralocorticoid signaling, mediated by aldosterone or glucocorticoids binding, now appears deleterious in the progression of pathologies that may lead to end-stage organ failure and could therefore benefit from the repositioning of pharmacological MR antagonists.
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Affiliation(s)
- F Jaisser
- INSERM UMR 1138 Team 1, Cordeliers Research Center, Pierre et Marie Curie University, Paris, France (F.J., N.F); and University Paris-Est Creteil, Creteil, France (F.J.)
| | - N Farman
- INSERM UMR 1138 Team 1, Cordeliers Research Center, Pierre et Marie Curie University, Paris, France (F.J., N.F); and University Paris-Est Creteil, Creteil, France (F.J.)
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10
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Epidermal Mineralocorticoid Receptor Plays Beneficial and Adverse Effects in Skin and Mediates Glucocorticoid Responses. J Invest Dermatol 2016; 136:2417-2426. [PMID: 27464843 DOI: 10.1016/j.jid.2016.07.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 06/30/2016] [Accepted: 07/11/2016] [Indexed: 12/20/2022]
Abstract
Glucocorticoids (GCs) regulate skin homeostasis and combat cutaneous inflammatory diseases; however, adverse effects of chronic GC treatments limit their therapeutic use. GCs bind and activate the GC receptor and the mineralocorticoid receptor (MR), transcription factors that recognize identical hormone responsive elements. Whether epidermal MR mediates beneficial or deleterious GC effects is of great interest for improving GC-based skin therapies. MR epidermal knockout mice exhibited increased keratinocyte proliferation and differentiation and showed resistance to GC-induced epidermal thinning. However, crucially, loss of epidermal MR rendered mice more sensitive to inflammatory stimuli and skin damage. MR epidermal knockout mice showed increased susceptibility to phorbol 12-myristate 13-acetate-induced inflammation with higher cytokine induction. Likewise, cultured MR epidermal knockout keratinocytes had increased phorbol 12-myristate 13-acetate-induced NF-κB activation, highlighting an anti-inflammatory function for MR. GC-induced transcription was reduced in MR epidermal knockout keratinocytes, at least partially due to decreased recruitment of GC receptor to hormone responsive element-containing sequences. Our results support a role for epidermal MR in adult skin homeostasis and demonstrate nonredundant roles for MR and GC receptor in mediating GC actions.
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11
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Suresh SC, Selvaraju V, Thirunavukkarasu M, Goldman JW, Husain A, Alexander Palesty J, Sanchez JA, McFadden DW, Maulik N. Thioredoxin-1 (Trx1) engineered mesenchymal stem cell therapy increased pro-angiogenic factors, reduced fibrosis and improved heart function in the infarcted rat myocardium. Int J Cardiol 2015; 201:517-28. [PMID: 26322599 DOI: 10.1016/j.ijcard.2015.08.117] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 07/15/2015] [Accepted: 08/11/2015] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Engraftment of mesenchymal stem cells (MSCs) has emerged as a powerful candidate for mediating myocardial repair. In this study, we genetically modified MSCs with an adenovector encoding thioredoxin-1 (Ad.Trx1). Trx1 has been described as a growth regulator, a transcription factor regulator, a cofactor, and a powerful antioxidant. We explored whether engineered MSCs, when transplanted, are capable of improving cardiac function and angiogenesis in a rat model of myocardial infarction (MI). METHODS Rat MSCs were cultured and divided into MSC, MSC+Ad.LacZ, and MSC+Ad.Trx1 groups. The cells were assayed for proliferation, and differentiation potential. In addition, rats were divided into control-sham (CS), control-MI (CMI), MSC+Ad.LacZ-MI (MLZMI), and MSC+Ad.Trx1-MI (MTrxMI) groups. MI was induced by left anterior descending coronary artery (LAD) ligation, and MSCs preconditioned with either Ad.LacZ or Ad.Trx1 were immediately administered to four sites in the peri-infarct zone. RESULTS The MSC+Ad.Trx1 cells increased the proliferation capacity and maintained pluripotency, allowing them to divide into cardiomyocytes, smooth muscle, and endothelial cells. Western blot analysis, 4 days after treatment showed increased vascular endothelial growth factor (VEGF), heme oxygenase-1 (HO-1), and C-X-C chemokine receptor type 4 (CXCR4). Also capillary density along with myocardial function as examined by echocardiography was found to be increased. Fibrosis was reduced in the MTrxMI group compared to MLZMI and CMI. Visualization of Connexin-43 by immunohistochemistry confirmed increased intercellular connections in the MTrxMI rats compared to MLZMI. CONCLUSION Engineering MSCs to express Trx1 may prove to be a strategic therapeutic modality in the treatment of cardiac failure.
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Affiliation(s)
- Sumanth C Suresh
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington Avenue, Farmington 06032, CT, USA
| | - Vaithinathan Selvaraju
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington Avenue, Farmington 06032, CT, USA
| | - Mahesh Thirunavukkarasu
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington Avenue, Farmington 06032, CT, USA
| | - Joshua W Goldman
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington Avenue, Farmington 06032, CT, USA
| | - Aaftab Husain
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington Avenue, Farmington 06032, CT, USA
| | - J Alexander Palesty
- Stanley J. Dudrick Department of Surgery, Saint Mary's Hospital, Waterbury 06706, CT, USA
| | - Juan A Sanchez
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington Avenue, Farmington 06032, CT, USA
| | - David W McFadden
- Department of Surgery, University of Connecticut School of Medicine, Farmington Avenue, Farmington 06032, CT, USA
| | - Nilanjana Maulik
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington Avenue, Farmington 06032, CT, USA.
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12
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Gravez B, Tarjus A, Pelloux V, Ouvrard‐Pascaud A, Delcayre C, Samuel J, Clément K, Farman N, Jaisser F, Messaoudi S. Aldosterone promotes cardiac endothelial cell proliferation in vivo. J Am Heart Assoc 2015; 4:e001266. [PMID: 25564371 PMCID: PMC4330055 DOI: 10.1161/jaha.114.001266] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 11/20/2014] [Indexed: 01/08/2023]
Abstract
BACKGROUND Experimentally, aldosterone in association with NaCl induces cardiac fibrosis, oxidative stress, and inflammation through mineralocorticoid receptor activation; however, the biological processes regulated by aldosterone alone in the heart remain to be identified. METHODS AND RESULTS Mice were treated for 7 days with aldosterone, and then cardiac transcriptome was analyzed. Aldosterone regulated 60 transcripts (51 upregulated and 9 downregulated) in the heart (fold change ≥1.5, false discovery rate <0.01). To identify the biological processes modulated by aldosterone, a gene ontology analysis was performed. The majority of aldosterone-regulated genes were involved in cell division. The cardiac Ki-67 index (an index of proliferation) of aldosterone-treated mice was higher than that of nontreated mice, confirming microarray predictions. Costaining of Ki-67 with vinculin, CD68, α-smooth muscle actin, CD31, or caveolin 1 revealed that the cycling cells were essentially endothelial cells. Aldosterone-induced mineralocorticoid receptor-dependent proliferation was confirmed ex vivo in human endothelial cells. Moreover, pharmacological-specific blockade of mineralocorticoid receptor by eplerenone inhibited endothelial cell proliferation in a preclinical model of heart failure (transverse aortic constriction). CONCLUSIONS Aldosterone modulates cardiac gene expression and induces the proliferation of cardiac endothelial cells in vivo.
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Affiliation(s)
- Basile Gravez
- Inserm U1138, Team 1, 15 rue de l'école de médecine, Paris, France (B.G., A.T., N.F., F.J., S.M.)
| | - Antoine Tarjus
- Inserm U1138, Team 1, 15 rue de l'école de médecine, Paris, France (B.G., A.T., N.F., F.J., S.M.)
| | - Véronique Pelloux
- INSERM‐UMR 1166 Team 6‐ GH Pitié‐Salpêtrière, 83 Bd de l'hôpital, Paris, France (P., K.C.)
| | | | - Claude Delcayre
- Inserm U942, 41 Boulevard de la chapelle, Paris, France (C.D., J.S.)
| | - Janelise Samuel
- Inserm U942, 41 Boulevard de la chapelle, Paris, France (C.D., J.S.)
| | - Karine Clément
- INSERM‐UMR 1166 Team 6‐ GH Pitié‐Salpêtrière, 83 Bd de l'hôpital, Paris, France (P., K.C.)
| | - Nicolette Farman
- Inserm U1138, Team 1, 15 rue de l'école de médecine, Paris, France (B.G., A.T., N.F., F.J., S.M.)
| | - Fréderic Jaisser
- Inserm U1138, Team 1, 15 rue de l'école de médecine, Paris, France (B.G., A.T., N.F., F.J., S.M.)
| | - Smail Messaoudi
- Inserm U1138, Team 1, 15 rue de l'école de médecine, Paris, France (B.G., A.T., N.F., F.J., S.M.)
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Meinel S, Gekle M, Grossmann C. Mineralocorticoid receptor signaling: crosstalk with membrane receptors and other modulators. Steroids 2014; 91:3-10. [PMID: 24928729 DOI: 10.1016/j.steroids.2014.05.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 05/16/2014] [Accepted: 05/28/2014] [Indexed: 12/30/2022]
Abstract
The mineralocorticoid receptor (MR) belongs to the steroid receptor superfamily. Classically, it acts as a ligand-bound transcription factor in epithelial tissues, where it regulates water and electrolyte homeostasis and controls blood pressure. Additionally, the MR has been shown to elicit pathophysiological effects including inflammation, fibrosis and remodeling processes in the cardiovascular system and the kidneys and MR antagonists have proven beneficial for patients with certain cardiovascular and renal disease. The underlying molecular mechanisms that mediate MR effects have not been fully elucidated but very likely rely on interactions with other signaling pathways in addition to genomic actions at hormone response elements. In this review we will focus on interactions of MR signaling with different membrane receptors, namely receptor tyrosine kinases and the angiotensin II receptor because of their potential relevance for disease. In addition, GPR30 is discussed as a new aldosterone receptor. To gain insights into the problem why the MR only seems to mediate pathophysiological effects in the presence of additional permissive factors we will also briefly discuss factors that lead to modulation of MR activity as well. Overall, MR signaling is part of an intricate network that still needs to be investigated further.
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Affiliation(s)
- S Meinel
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Germany
| | - M Gekle
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Germany
| | - C Grossmann
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Germany.
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14
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Rishi MT, Selvaraju V, Thirunavukkarasu M, Shaikh IA, Takeda K, Fong GH, Palesty JA, Sanchez JA, Maulik N. Deletion of prolyl hydroxylase domain proteins (PHD1, PHD3) stabilizes hypoxia inducible factor-1 alpha, promotes neovascularization, and improves perfusion in a murine model of hind-limb ischemia. Microvasc Res 2014; 97:181-8. [PMID: 25446011 DOI: 10.1016/j.mvr.2014.10.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 09/25/2014] [Accepted: 10/24/2014] [Indexed: 01/04/2023]
Abstract
BACKGROUND There is an emerging focus on investigating innovative therapeutic molecules that can potentially augment neovascularization in order to treat peripheral arterial disease (PAD). Although prolyl hydroxylase domain proteins 1 and 3 (PHD1 and PHD3) may modulate angiogenesis via regulation of hypoxia inducible factor-1α (HIF-1α), there has been no study directly addressing their roles in ischemia-induced vascular growth. We hypothesize that PHD1(-/-) or PHD3(-/-) deficiency might promote angiogenesis in the murine hind-limb ischemia (HLI) model. STUDY DESIGN Wild type (WT), PHD1(-/-) and PHD3(-/-) male mice aged 8-12weeks underwent right femoral artery ligation. Post-procedurally, motor function assessment and laser Doppler imaging were periodically performed. The mice were euthanized after 28days and muscles were harvested. Immunohistochemical analysis was performed to determine the extent of angiogenesis by measuring capillary and arteriolar density. VEGF expression was quantified by enzyme-linked immunosorbent assay (ELISA). Bcl-2 and HIF-1α were analyzed by immunofluorescence. Fibrosis was measured by picrosirius red staining. RESULTS PHD1(-/-) and PHD3(-/-) mice showed significantly improved recovery of perfusion and motor function score when compared to WT after femoral artery ligation. These mice also exhibited increased capillary and arteriolar density, capillary/myocyte ratio along with decreased fibrosis compared to WT. VEGF, Bcl-2 and HIF-1α expression increased in PHD1(-/-) and PHD3(-/-) mice compared to WT. CONCLUSIONS Taken together these results suggest that PHD1 and PHD3 deletions promote angiogenesis in ischemia-injured tissue, and may present a promising therapeutic strategy in treating PAD.
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Affiliation(s)
- Muhammad T Rishi
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut Health Center, Farmington, CT, USA; Stanley J. Dudrick Department of Surgery, Saint Mary's Hospital, Waterbury, CT, USA
| | - Vaithinathan Selvaraju
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut Health Center, Farmington, CT, USA
| | - Mahesh Thirunavukkarasu
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut Health Center, Farmington, CT, USA
| | - Inam A Shaikh
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut Health Center, Farmington, CT, USA; Stanley J. Dudrick Department of Surgery, Saint Mary's Hospital, Waterbury, CT, USA
| | - Kotaro Takeda
- Department of Cell Biology, University of Connecticut Health Center, Farmington, CT, USA
| | - Guo-Hua Fong
- Department of Cell Biology, University of Connecticut Health Center, Farmington, CT, USA
| | - J Alexander Palesty
- Stanley J. Dudrick Department of Surgery, Saint Mary's Hospital, Waterbury, CT, USA
| | - Juan A Sanchez
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut Health Center, Farmington, CT, USA
| | - Nilanjana Maulik
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut Health Center, Farmington, CT, USA.
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15
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High-throughput phenotypic assessment of cardiac physiology in four commonly used inbred mouse strains. J Comp Physiol B 2014; 184:763-75. [PMID: 24788387 DOI: 10.1007/s00360-014-0830-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 03/25/2014] [Accepted: 04/01/2014] [Indexed: 01/19/2023]
Abstract
Mice with genetic alterations are used in heart research as model systems of human diseases. In the last decade there was a marked increase in the recognition of genetic diversity within inbred mouse strains. Increasing numbers of inbred mouse strains and substrains and analytical variation of cardiac phenotyping methods require reproducible, high-throughput methods to standardize murine cardiovascular physiology. We describe methods for non-invasive, reliable, easy and fast to perform echocardiography and electrocardiography on awake mice. This method can be used for primary screening of the murine cardiovascular system in large-scale analysis. We provide insights into the physiological divergence of C57BL/6N, C57BL/6J, C3HeB/FeJ and 129P2/OlaHsd mouse hearts and define the expected normal values. Our report highlights that compared to the other three strains tested C57BL/6N hearts reveal features of heart failure such as hypertrophy and reduced contractile function. We found several features of the mouse ECG to be under genetic control and obtained several strain-specific differences in cardiac structure and function.
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16
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Fazal L, Azibani F, Bihry N, Coutance G, Polidano E, Merval R, Vodovar N, Launay J, Delcayre C, Samuel J. Akt‐mediated cardioprotective effects of aldosterone in type 2 diabetic mice. FASEB J 2014; 28:2430-40. [DOI: 10.1096/fj.13-239822] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Loubina Fazal
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
- Paris Diderot UniversityParisFrance
| | - Feriel Azibani
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
| | - Nicolas Bihry
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
- Assistance Publique–Hôpitaux de Paris (AP‐HP)Biochemistry DepartmentLariboisiere HospitalParisFrance
| | - Guillaume Coutance
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
- Paris Diderot UniversityParisFrance
| | - Evelyne Polidano
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
| | - Régine Merval
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
| | - Nicolas Vodovar
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
| | - Jean‐Marie Launay
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
- Assistance Publique–Hôpitaux de Paris (AP‐HP)Biochemistry DepartmentLariboisiere HospitalParisFrance
- Paris Descartes UniversityParisFrance
| | - Claude Delcayre
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
- Paris Diderot UniversityParisFrance
| | - Jane‐Lise Samuel
- Unité Mixte de Recherche en Santé (UMR‐S) 942Institut National de la Santé et de la Recherche Médicale (INSERM)Biochemistry DepartmentLariboisiere HospitalParisFrance
- Assistance Publique–Hôpitaux de Paris (AP‐HP)Biochemistry DepartmentLariboisiere HospitalParisFrance
- Paris Diderot UniversityParisFrance
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17
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Lagrange J, Li Z, Fassot C, Bourhim M, Louis H, Nguyen Dinh Cat A, Parlakian A, Wahl D, Lacolley P, Jaisser F, Regnault V. Endothelial mineralocorticoid receptor activation enhances endothelial protein C receptor and decreases vascular thrombosis in mice. FASEB J 2014; 28:2062-72. [PMID: 24451386 DOI: 10.1096/fj.13-238188] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Previous studies have shown that aldosterone, which activates the mineralocorticoid receptor (MR), promotes thrombosis in animal models. Our objective was to determine whether MR activation/expression in the vascular endothelium could modify thrombotic risk in vivo and to examine thrombin generation at the surface of aortic endothelial cells (HAECs). MR was conditionally overexpressed in vivo in vascular endothelial cells in mice (MR-EC mice) or stimulated with aldosterone in HAECs. Thrombosis after ferric chloride injury was delayed in MR-EC mice compared with controls as well as in wild-type FVB/NRj mice treated with aldosterone (60 μg/kg/d for 21 d). Thrombin generation in platelet-poor plasma did not differ between MR-EC mice and controls. In MR-EC mice, aortic endothelial cell protein C receptor (EPCR) expression was increased. Aldosterone (10(-8) M) attenuated thrombin generation at the surface of cultured HAECs, and this effect was associated with up-regulation of expression of EPCR, which promotes formation of activated protein C. Aldosterone increases EPCR expression via a transcriptional mechanism involving interaction of MR with the specificity protein 1 site. These findings demonstrate that MR activation acts on endothelial cells to protect against thrombosis in physiological conditions and that MR-mediated EPCR overexpression drives this antithrombotic property through enhancing protein C activation.
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Affiliation(s)
- Jérémy Lagrange
- 2INSERM U1116, Faculté de Médecine, 9 Avenue de la Forêt de Haye, 54500 Vandoeuvre-les-Nancy, France.
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18
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Zeng H, He X, Hou X, Li L, Chen JX. Apelin gene therapy increases myocardial vascular density and ameliorates diabetic cardiomyopathy via upregulation of sirtuin 3. Am J Physiol Heart Circ Physiol 2013; 306:H585-97. [PMID: 24363305 DOI: 10.1152/ajpheart.00821.2013] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Microvascular insufficiency contributes to cardiac hypertrophy and worsens heart dysfunction in diabetic cardiomyopathy. Our recent study shows that apelin may protect ischemic heart failure via upregulation of sirtuin 3 (Sirt3) and angiogenesis. This study investigated whether apelin promotes angiogenesis and ameliorates diabetic cardiomyopathy via activation of Sirt3. Wild-type (WT) and diabetic db/db mice were administrated with adenovirus-apelin to overexpressing apelin. In WT mice, overexpression of apelin increased Sirt3, VEGF/VEGFR2, and angiopoietin-1 (Ang-1)/Tie-2 expression in the heart. In vitro, treatment of endothelial cells (EC) with apelin increased VEGF and Ang-1 expression. In EC isolated from Sirt3KO mice, however, apelin treatment did not upregulate VEGF and Ang-1 expression. Moreover, apelin-induced angiogenesis was diminished in Sirt3KO mice. In db/db mice, the basal levels of apelin and Sirt3 expression were significantly reduced in the heart. This was accompanied by a significant reduction of capillary and arteriole densities in the heart. Overexpression of apelin increased Sirt3, VEGF/VEGFR2, and Ang-1/Tie-2 expression together with improved vascular density in db/db mice. Overexpression of apelin further improved cardiac function in db/db mice. Treatment with apelin significantly attenuated high glucose (HG)-induced reactive oxygen species (ROS) formation and EC apoptosis. The protection of apelin against HG-induced ROS formation and EC apoptosis was diminished in Sirt3KO-EC. We conclude that apelin gene therapy increases vascular density and alleviates diabetic cardiomyopathy by a mechanism involving activation of Sirt3 and upregulation of VEGF/VEGFR2 and Ang-1/Tie-2 expression.
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Affiliation(s)
- Heng Zeng
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
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19
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Khorram O, Ghazi R, Chuang TD, Han G, Naghi J, Ni Y, Pearce WJ. Excess maternal glucocorticoids in response to in utero undernutrition inhibit offspring angiogenesis. Reprod Sci 2013; 21:601-11. [PMID: 24155066 DOI: 10.1177/1933719113508819] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
To test the hypothesis that inhibition of offspring angiogenesis by maternal undernutrition (MUN) is mediated by maternal glucocorticoids, 3 groups of dams were studied: controls received ad libitum food; MUN dams were food restricted by 50% from day 10 of gestation; and metyrapone (MET) dams were food restricted and treated with 0.5 mg/mL of MET, a glucocorticoid synthesis inhibitor. The MUN reduced birth weights, reduced vascular endothelial growth factor (VEGF) abundance in P1 aortas, reduced VEGF and VEGF-R2 abundances in P1 mesenteric arterioles, reduced arteriolar endothelial nitric oxide synthase abundance, reduced microvessel density in the anterior tibialis, reduced endothelial cell branching in culture, reduced arteriolar immunoreactivity for proliferating cell nuclear antigen (PCNA), increased active caspase 3 in P1 mesenteric arterioles, and decreased matrix metalloproteinase (MMP)-2 and MMP-9 abundances in lysates of P1 aortas. All of these effects were prevented by treatment with metyrapone. Collectively, these findings suggest that reduced angiogenesis in MUN offspring involves direct inhibitory effects of maternal glucorticoid on fetal VEGF and its receptors.
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Affiliation(s)
- Omid Khorram
- 1Department of Obstetrics and Gynecology, La Biomedical Institute, Harbor-UCLA Medical Center, Torrance, CA, USA
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20
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Bousquet E, Zhao M, Ly A, Leroux les Jardins G, Goldenberg B, Naud MC, Jonet L, Besson-Lescure B, Jaisser F, Farman N, De Kozak Y, Behar-Cohen F. The aldosterone-mineralocorticoid receptor pathway exerts anti-inflammatory effects in endotoxin-induced uveitis. PLoS One 2012; 7:e49036. [PMID: 23152847 PMCID: PMC3494666 DOI: 10.1371/journal.pone.0049036] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 10/03/2012] [Indexed: 01/09/2023] Open
Abstract
We have previously shown that the eye is a mineralocorticoid-sensitive organ and we now question the role of mineralocorticoid receptor (MR) in ocular inflammation. The endotoxin-induced uveitis (EIU), a rat model of human intraocular inflammation, was induced by systemic administration of lipopolysaccharide (LPS). Evaluations were made 6 and 24 hours after intraocular injection of aldosterone (simultaneous to LPS injection). Three hours after onset of EIU, the MR and the glucocorticoid metabolizing enzyme 11-beta hydroxysteroid dehydrogenase type 2 (11β-HSD2) expression were down-regulated in iris/ciliary body and the corticosterone concentration was increased in aqueous humor, altering the normal MR/glucocorticoid receptor (GR) balance. At 24 hours, the GR expression was also decreased. In EIU, aldosterone reduced the intensity of clinical inflammation in a dose-dependent manner. The clinical benefit of aldosterone was abrogated in the presence of the MR antagonist (RU26752) and only partially with the GR antagonist (RU38486). Aldosterone reduced the release of inflammatory mediators (6 and 24 hours: TNF-α, IFN-γ, MIP-1α) in aqueous humor and the number of activated microglia/macrophages. Aldosterone partly prevented the uveitis-induced MR down-regulation. These results suggest that MR expression and activation in iris/ciliary body could protect the ocular structures against damages induced by EIU.
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Affiliation(s)
- Elodie Bousquet
- INSERM U872, Université René Descartes Sorbonne Paris Cité, Team 17, Centre de Recherche des Cordeliers, Paris, France
- Université René Descartes Sorbonne, Paris Cité, France
| | - Min Zhao
- INSERM U872, Université René Descartes Sorbonne Paris Cité, Team 17, Centre de Recherche des Cordeliers, Paris, France
- Université René Descartes Sorbonne, Paris Cité, France
| | - André Ly
- INSERM U872, Université René Descartes Sorbonne Paris Cité, Team 17, Centre de Recherche des Cordeliers, Paris, France
- Université René Descartes Sorbonne, Paris Cité, France
| | - Guillaume Leroux les Jardins
- INSERM U872, Université René Descartes Sorbonne Paris Cité, Team 17, Centre de Recherche des Cordeliers, Paris, France
- Université René Descartes Sorbonne, Paris Cité, France
- Assistance Publique des Hôpitaux de Paris, Hôtel-Dieu, Paris, France
| | - Brigitte Goldenberg
- INSERM U872, Université René Descartes Sorbonne Paris Cité, Team 17, Centre de Recherche des Cordeliers, Paris, France
- Université René Descartes Sorbonne, Paris Cité, France
| | - Marie-Christine Naud
- INSERM U872, Université René Descartes Sorbonne Paris Cité, Team 17, Centre de Recherche des Cordeliers, Paris, France
- Université René Descartes Sorbonne, Paris Cité, France
| | - Laurent Jonet
- INSERM U872, Université René Descartes Sorbonne Paris Cité, Team 17, Centre de Recherche des Cordeliers, Paris, France
- Université René Descartes Sorbonne, Paris Cité, France
| | - Bernadette Besson-Lescure
- Plateforme technologique de phénotypage du petit animal et microdosages. IFR65/IRSSA, Hôpital Saint-Antoine, Paris, France
| | - Frederic Jaisser
- INSERM U872, Université Pierre et Marie Curie, Team 1, Centre de Recherche des Cordeliers, Paris, France
| | - Nicolette Farman
- INSERM U872, Université Pierre et Marie Curie, Team 1, Centre de Recherche des Cordeliers, Paris, France
| | - Yvonne De Kozak
- INSERM U872, Université René Descartes Sorbonne Paris Cité, Team 17, Centre de Recherche des Cordeliers, Paris, France
- Université René Descartes Sorbonne, Paris Cité, France
| | - Francine Behar-Cohen
- INSERM U872, Université René Descartes Sorbonne Paris Cité, Team 17, Centre de Recherche des Cordeliers, Paris, France
- Université René Descartes Sorbonne, Paris Cité, France
- Assistance Publique des Hôpitaux de Paris, Hôtel-Dieu, Paris, France
- * E-mail:
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21
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Azibani F, Devaux Y, Coutance G, Schlossarek S, Polidano E, Fazal L, Merval R, Carrier L, Solal AC, Chatziantoniou C, Launay JM, Samuel JL, Delcayre C. Aldosterone inhibits the fetal program and increases hypertrophy in the heart of hypertensive mice. PLoS One 2012; 7:e38197. [PMID: 22666483 PMCID: PMC3364229 DOI: 10.1371/journal.pone.0038197] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 05/01/2012] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Arterial hypertension (AH) induces cardiac hypertrophy and reactivation of "fetal" gene expression. In rodent heart, alpha-Myosin Heavy Chain (MyHC) and its micro-RNA miR-208a regulate the expression of beta-MyHC and of its intronic miR-208b. However, the role of aldosterone in these processes remains unclear. METHODOLOGY/PRINCIPAL FINDINGS RT-PCR and western-blot were used to investigate the genes modulated by arterial hypertension and cardiac hyperaldosteronism. We developed a model of double-transgenic mice (AS-Ren) with cardiac hyperaldosteronism (AS mice) and systemic hypertension (Ren). AS-Ren mice had increased (x2) angiotensin II in plasma and increased (x2) aldosterone in heart. Ren and AS-Ren mice had a robust and similar hypertension (+70%) versus their controls. Anatomical data and echocardiography showed a worsening of cardiac hypertrophy (+41%) in AS-Ren mice (P<0.05 vs Ren). The increase of ANP (x 2.5; P<0.01) mRNA observed in Ren mice was blunted in AS-Ren mice. This non-induction of antitrophic natriuretic peptides may be involved in the higher trophic cardiac response in AS-Ren mice, as indicated by the markedly reduced cardiac hypertrophy in ANP-infused AS-Ren mice for one month. Besides, the AH-induced increase of ßMyHC and its intronic miRNA-208b was prevented in AS-Ren. The inhibition of miR 208a (-75%, p<0.001) in AS-Ren mice compared to AS was associated with increased Sox 6 mRNA (x 1.34; p<0.05), an inhibitor of ßMyHC transcription. Eplerenone prevented all aldosterone-dependent effects. CONCLUSIONS/SIGNIFICANCE Our results indicate that increased aldosterone in heart inhibits the induction of atrial natriuretic peptide expression, via the mineralocorticoid receptor. This worsens cardiac hypertrophy without changing blood pressure. Moreover, this work reveals an original aldosterone-dependent inhibition of miR-208a in hypertension, resulting in the inhibition of β-myosin heavy chain expression through the induction of its transcriptional repressor Sox6. Thus, aldosterone inhibits the fetal program and increases cardiac hypertrophy in hypertensive mice.
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Affiliation(s)
- Feriel Azibani
- Unit 942 INSERM and Université Paris-Diderot, Paris, France
| | - Yvan Devaux
- Centre de Recherche Public de la Santé, Luxembourg, Luxembourg
| | | | - Saskia Schlossarek
- Department of Experimental Pharmacology and Toxicology and University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Loubina Fazal
- Unit 942 INSERM and Université Paris-Diderot, Paris, France
| | - Regine Merval
- Unit 942 INSERM and Université Paris-Diderot, Paris, France
| | - Lucie Carrier
- Department of Experimental Pharmacology and Toxicology and University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- UPMC, INSERM UMR-S974, CNRS UMR7215, Institut de Myologie, Paris, France
| | - Alain Cohen Solal
- Unit 942 INSERM and Université Paris-Diderot, Paris, France
- Lariboisière Hospital AP-HP, Paris, France
| | | | - Jean-Marie Launay
- Unit 942 INSERM and Université Paris-Diderot, Paris, France
- Lariboisière Hospital AP-HP, Paris, France
| | - Jane-Lise Samuel
- Unit 942 INSERM and Université Paris-Diderot, Paris, France
- Lariboisière Hospital AP-HP, Paris, France
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22
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Azibani F, Benard L, Schlossarek S, Merval R, Tournoux F, Fazal L, Polidano E, Launay JM, Carrier L, Chatziantoniou C, Samuel JL, Delcayre C. Aldosterone inhibits antifibrotic factors in mouse hypertensive heart. Hypertension 2012; 59:1179-87. [PMID: 22547442 DOI: 10.1161/hypertensionaha.111.190512] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The renin-angiotensin-aldosterone system is involved in the arterial hypertension-associated cardiovascular remodeling. In this context, the development of cardiac fibrosis results from an imbalance between profibrotic and antifibrotic pathways, in which the role of aldosterone is yet not established. To determine the role of intracardiac aldosterone in the development of myocardial fibrosis during hypertension, we used a double transgenic model (AS-Ren) of cardiac hyperaldosteronism (AS) and systemic hypertension (Ren). The 9-month-old hypertensive mice had cardiac fibrosis, and hyperaldosteronism enhanced the fibrotic level. The mRNA levels of connective tissue growth factor and transforming growth factor-β1 were similarly increased in Ren and AS-Ren mice compared with wild-type and AS mice, respectively. Hyperaldosteronism combined with hypertension favored the macrophage infiltration (CD68(+) cells) in heart, and enhanced the mRNA level of monocyte chemoattractant protein 1, osteopontin, and galectin 3. Interestingly, in AS-Ren mice the hypertension-induced increase in bone morphogenetic protein 4 mRNA and protein levels was significantly inhibited, and B-type natriuretic peptide expression was blunted. The mineralocorticoid receptor antagonist eplerenone restored B-type natriuretic peptide and bone morphogenetic protein 4 levels and decreased CD68 and galectin 3 levels in AS-Ren mice. Finally, when hypertension was induced by angiotensin II infusion in wild-type and AS mice, the mRNA profiles did not differ from those observed in Ren and AS-Ren mice, respectively. The aldosterone-induced inhibition of B-type natriuretic peptide and bone morphogenetic protein 4 expression was confirmed in vitro in neonatal mouse cardiomyocytes. Altogether, we demonstrate that, at the cardiac level, hyperaldosteronism worsens hypertension-induced fibrosis through 2 mineralocorticoid receptor-dependent mechanisms, activation of inflammation/galectin 3-induced fibrosis and inhibition of antifibrotic factors (B-type natriuretic peptide and bone morphogenetic protein 4).
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Affiliation(s)
- Feriel Azibani
- Institut National de la Santé et de la Recherche Médicale U942 and Université Paris-Diderot, Paris, France
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23
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Chen JX, Zeng H, Reese J, Aschner JL, Meyrick B. Overexpression of angiopoietin-2 impairs myocardial angiogenesis and exacerbates cardiac fibrosis in the diabetic db/db mouse model. Am J Physiol Heart Circ Physiol 2011; 302:H1003-12. [PMID: 22180648 DOI: 10.1152/ajpheart.00866.2011] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The angiopoietins/Tie-2 system is essential for the maintenance of vascular integrity and angiogenesis. The functional role of angiopoietin-2 (Ang-2) in the regulation of angiogenesis is dependent on other growth factors such as VEGF and a given physiopathological conditions. This study investigates the potential role of Ang-2 in myocardial angiogenesis and fibrosis formation in the diabetic db/db mouse. Diabetic db/db mice received intramyocardial administration of either adenovirus Ang-2 (Ad-CMV-Ang-2) or Ad-β-gal. The levels of Tie-2, VEGF, caspase-3, Wnt7b, fibroblast-specific protein-1 (FSP-1), and adhesion molecules (ICAM-1 and VCAM-1) expression were measured. Apoptosis, capillary density, and cardiac fibrosis were also analyzed in the db/db mouse hearts. Overexpression of Ang-2 suppressed Tie-2 and VEGF expression in db/db mouse hearts together with significant upregulation of Wnt7b expression. Overexpression of Ang-2 also sensitizes ICAM-1 and VCAM-1 expression in db/db mouse hearts. Immunohistochemical analysis revealed that overexpression of Ang-2 resulted in a gradual apoptosis as well as interstitial fibrosis formation, these leading to a significant loss of capillary density. Data from these studies were confirmed in cultured mouse heart microvascular endothelial cells (MHMEC) exposed to excessive Ang-2. Exposure of MHMEC to Ang-2 resulted in increased caspase-3 activity and endothelial apoptosis. Knockdown of Ang-2 attenuated high glucose-induced endothelial cell apoptosis. Further, counterbalance of Ang-2 by overexpression of Ang-1 reversed loss of capillary density and fibrosis formation in db/db mouse hearts. Our data demonstrate that Ang-2 increases endothelial apoptosis, sensitizes myocardial microvascular inflammation, and promotes cardiac fibrosis and thus contributes to loss of capillary density in diabetic diseases.
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Affiliation(s)
- Jian-Xiong Chen
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS 39216, USA.
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Lother A, Berger S, Gilsbach R, Rösner S, Ecke A, Barreto F, Bauersachs J, Schütz G, Hein L. Ablation of mineralocorticoid receptors in myocytes but not in fibroblasts preserves cardiac function. Hypertension 2011; 57:746-54. [PMID: 21321305 DOI: 10.1161/hypertensionaha.110.163287] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Antagonists of the mineralocorticoid receptor improve morbidity and mortality in patients with severe heart failure. However, the cell types involved in these beneficial effects are only partially known. The aim of this work was to evaluate whether genetic deletion of mineralocorticoid receptors in mouse cardiomyocytes or fibroblasts in vivo is cardioprotective after chronic left ventricular pressure overload. After transverse aortic constriction, mice deficient in myocyte mineralocorticoid receptors but not those deficient in fibroblast mineralocorticoid receptors were protected from left ventricular dilatation and dysfunction. After pressure overload, left ventricular ejection fraction was significantly higher in mice lacking myocyte mineralocorticoid receptors (70.2±4.4%) as compared with control mice (54.3±2.5%; P<0.01). Myocyte mineralocorticoid receptor-deficient mice showed mild cardiac hypertrophy at baseline, contributing to reduced left ventricular wall tension at baseline and after pressure overload. Cardiac levels of phospho-extracellular signal-regulated kinase 1/2 were higher in myocyte mineralocorticoid receptor-deficient mice than in control mice after pressure overload. Neither fibroblast nor myocyte mineralocorticoid receptor ablation altered the development of cardiac hypertrophy or fibrosis after pressure overload. Both mineralocorticoid receptor mutant mouse strains developed similar degrees of myocyte apoptosis, proinflammatory gene expression, and macrophage infiltration after pressure overload. Thus, mineralocorticoid receptors in cardiac myocytes but not in fibroblasts protect from cardiac dilatation and failure after chronic pressure overload.
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Affiliation(s)
- Achim Lother
- Institute of Experimental and Clinical Pharmacology and Toxicology, University of Freiburg, Albertstrasse 29, 79104 Freiburg, Germany
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Eplerenone administration has beneficial effect on hepatic paraoxonase 1 activity in diabetic mice. Atherosclerosis 2009; 208:26-7. [PMID: 19651407 DOI: 10.1016/j.atherosclerosis.2009.06.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2009] [Revised: 06/22/2009] [Accepted: 06/22/2009] [Indexed: 11/24/2022]
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