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Rached G, Saliba Y, Maddah D, Hajal J, Smayra V, Bakhos J, Groschner K, Birnbaumer L, Fares N. TRPC3 Regulates Islet Beta-Cell Insulin Secretion. Adv Sci (Weinh) 2023; 10:e2204846. [PMID: 36642838 PMCID: PMC9951314 DOI: 10.1002/advs.202204846] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 11/18/2022] [Indexed: 06/17/2023]
Abstract
Insulin release is tightly controlled by glucose-stimulated calcium (GSCa) through hitherto equivocal pathways. This study investigates TRPC3, a non-selective cation channel, as a critical regulator of insulin secretion and glucose control. TRPC3's involvement in glucose-stimulated insulin secretion (GSIS) is studied in human and animal islets. TRPC3-dependent in vivo insulin secretion is investigated using pharmacological tools and Trpc3-/- mice. TRPC3's involvement in islet glucose uptake and GSCa is explored using fluorescent glucose analogue 2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl) amino]-2-deoxy-D-glucose and calcium imaging. TRPC3 modulation by a small-molecule activator, GSK1702934A, is evaluated in type 2 diabetic mice. TRPC3 is functionally expressed in human and mouse islet beta cells. TRPC3-controlled insulin secretion is KATP -independent and primarily mediated by diacylglycerol channel regulation of the cytosolic calcium oscillations following glucose stimulation. Conversely, glucose uptake in islets is independent of TRPC3. TRPC3 pharmacologic inhibition and knockout in mice lead to defective insulin secretion and glucose intolerance. Subsequently, TRPC3 activation through targeted small-molecule enhances insulin secretion and alleviates diabetes hallmarks in animals. This study imputes a function for TRPC3 at the onset of GSIS. These insights strengthen one's knowledge of insulin secretion physiology and set forth the TRPC3 channel as an appealing candidate for drug development in the treatment of diabetes.
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Affiliation(s)
- Gaëlle Rached
- Physiology and Pathophysiology Research LaboratoryPole of Technology and HealthFaculty of MedicineSaint Joseph University of BeirutPOBox. 17‐5208 ‐ Mar MikhaëlBeirut1104 2020Lebanon
| | - Youakim Saliba
- Physiology and Pathophysiology Research LaboratoryPole of Technology and HealthFaculty of MedicineSaint Joseph University of BeirutPOBox. 17‐5208 ‐ Mar MikhaëlBeirut1104 2020Lebanon
| | - Dina Maddah
- Physiology and Pathophysiology Research LaboratoryPole of Technology and HealthFaculty of MedicineSaint Joseph University of BeirutPOBox. 17‐5208 ‐ Mar MikhaëlBeirut1104 2020Lebanon
| | - Joelle Hajal
- Physiology and Pathophysiology Research LaboratoryPole of Technology and HealthFaculty of MedicineSaint Joseph University of BeirutPOBox. 17‐5208 ‐ Mar MikhaëlBeirut1104 2020Lebanon
| | - Viviane Smayra
- Faculty of MedicineSaint Joseph UniversitySaint Joseph University of BeirutPOBox. 17‐5208 ‐ Mar MikhaëlBeirut1104 2020Lebanon
| | - Jules‐Joel Bakhos
- Physiology and Pathophysiology Research LaboratoryPole of Technology and HealthFaculty of MedicineSaint Joseph University of BeirutPOBox. 17‐5208 ‐ Mar MikhaëlBeirut1104 2020Lebanon
| | - Klaus Groschner
- Gottfried‐Schatz‐Research‐Centre‐BiophysicsMedical University of GrazGraz8010Austria
| | - Lutz Birnbaumer
- School of Medical SciencesInstitute of Biomedical Research (BIOMED)Catholic University of ArgentinaBuenos AiresC1107AAZArgentina
- Signal Transduction LaboratoryNational Institute of Environmental Health SciencesResearch Triangle ParkDurhamNCC1107AAZUSA
| | - Nassim Fares
- Physiology and Pathophysiology Research LaboratoryPole of Technology and HealthFaculty of MedicineSaint Joseph University of BeirutPOBox. 17‐5208 ‐ Mar MikhaëlBeirut1104 2020Lebanon
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Achkar A, Naous E, Gannage-Yared MH, Sleilaty G, Smayra V, Hajj G. Effect of Age, Gender, and Body Mass Index on Thyroid Bethesda Classification: A Retrospective Study. J Endocrinol Metab 2022. [DOI: 10.14740/jem806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Maalouly G, Hajal J, Noujeim C, Choueiry M, Nassereddine H, Smayra V, Saliba Y, Fares N. New insights in gut-liver axis in wild-type murine imiquimod-induced lupus. Lupus 2021; 30:926-936. [PMID: 33596715 DOI: 10.1177/0961203321995254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Intestinal and hepatic manifestations of lupus seem to be underestimated in comparison to other major organ lesions. Although recent data point to gut-liver axis involvement in lupus, gut permeability dysfunction and liver inflammation need to be more investigated. OBJECTIVE This study aims to assess fecal calprotectin, intestinal tight junction proteins and liver inflammation pathway in wild-type murine imiquimod- induced lupus. METHODS C57BL/6 mice were topically treated on their right ears with 1.25 mg of 5% imiquimod cream, three times per week for six weeks. Fecal calprotectin was collected at day 0, 22 and 45. Renal, liver and intestinal pathology, as well as inflammatory markers, intestinal tight junction proteins, and E. coli protein in liver were assessed at sacrifice. RESULTS At six weeks, lupus nephritis was confirmed on histopathology and NGAL and KIM-1 expression. Calprotectin rise started at day 22 and persists at day 45. Protein expression of Claudine, ZO-1 and occludin was significantly decreased. E. coli protein was significantly increased in liver with necro-inflammation and increased TLR4, TLR7, and pNFκB/NFκB liver expression. CONCLUSION This study is the first to demonstrate early fecal calprotectin increase and liver activation of TLR4- NFκB pathway in wild-type murine imiquimod-induced lupus.
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Affiliation(s)
- Georges Maalouly
- Faculty of Medicine, CHU Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
| | - Joelle Hajal
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Charbel Noujeim
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Michel Choueiry
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Hussein Nassereddine
- Faculty of Medicine, CHU Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
| | - Viviane Smayra
- Faculty of Medicine, CHU Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
| | - Youakim Saliba
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Nassim Fares
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
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Maalouly G, Hajal J, Noujeim C, Choueiry M, Nassereddine H, Smayra V, Saliba Y, Fares N. Axe intestin-foie dans un modèle murin de lupus induit par un agoniste TLR-7. Rev Med Interne 2020. [DOI: 10.1016/j.revmed.2020.10.244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Maalouly G, Hajal J, Saliba Y, Rached G, Layoun H, Smayra V, Sleilaty G, Irani C, Fares N. Beneficial role of simvastatin in experimental autoimmune myositis. Int Immunopharmacol 2019; 79:106051. [PMID: 31863923 DOI: 10.1016/j.intimp.2019.106051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/08/2019] [Accepted: 11/11/2019] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Statins have immunomodulatory potential in autoimmune diseases but had not been studied as a disease-modifying agent in inflammatory myopathies. The objective of this study is to assess the effect of simvastatin in an experimental model of autoimmune myositis in mice on muscle strength and histopathology. METHODS Four groups of mice (n = 5 per group) were selected for experimentally induced myositis. Mice were immunized with 1.5 mg myosin in complete Freund's adjuvant weekly for two times and injected with 500 ng pertussis toxin twice immediately after each immunization. From day 1 before immunization to 10 days after the last immunization, mice were treated with oral simvastatin (10 or 20 or 40 mg/kg) diluted in DMSO. The control group mice were injected with complete Freund's adjuvant weekly for two times and did not receive treatment. Non-immunized mice (n = 5 per group) were treated either with simvastatin (5 mg/kg or 20 mg/kg or 40 mg/kg of simvastatin diluted in DMSO) or with DMSO. RESULTS Inflammation was observed in myositis groups with positive myositis-specific antibodies. Muscle strength dropped significantly after immunization. Immunized simvastatin 20 mg/kg treated group had significantly higher muscle strength versus non-treated myositis mice and versus other simvastatin doses. Besides, a trend toward higher serum Th17 percentage population was found in immunized non-treated mice, versus immunized simvastatin- treated mice, without significant difference. CONCLUSION Simvastatin at 20 mg/kg decreases the severity of myositis in experimental autoimmune myositis and is a candidate of being a disease-modifying agent in inflammatory myopathies.
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Affiliation(s)
- G Maalouly
- Faculty of Medicine, CHU Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
| | - J Hajal
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Y Saliba
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - G Rached
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - H Layoun
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - V Smayra
- Faculty of Medicine, CHU Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
| | - G Sleilaty
- Faculty of Medicine, CHU Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
| | - C Irani
- Faculty of Medicine, CHU Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
| | - N Fares
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon.
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Amara J, Saliba Y, Hajal J, Smayra V, Bakhos JJ, Sayegh R, Fares N. Circadian Rhythm Disruption Aggravates DSS-Induced Colitis in Mice with Fecal Calprotectin as a Marker of Colitis Severity. Dig Dis Sci 2019; 64:3122-3133. [PMID: 31115725 DOI: 10.1007/s10620-019-05675-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 05/15/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Inflammatory bowel disease (IBD) is a chronic immunologically mediated pathology that remains a major health burden. Circadian rhythm disruption leads to a deregulation in the immune system which is a major risk factor for IBD. AIMS Since fecal calprotectin (FC) has been a useful tool for monitoring IBD, we aimed to evaluate the effect of circadian rhythm alteration on gut inflammation status and whether FC is associated with the severity of colitis. METHODS C57BL/6J mice were exposed to circadian shifts for 3 months, and then colitis was induced by 2% dextran sulfate sodium (DSS). Colitis was evaluated according to clinical symptoms and histological scoring. Plasma and intestinal inflammatory and permeability markers as well as fecal and intestinal calprotectin were assessed. RESULTS Circadian shifts aggravated DSS-induced colitis with increased diarrhea, flatulence, and fecal blood associated with decreased colon length. In addition, intestinal cryptic architecture was lost with the presence of increased inflammation, mucosal muscle thickening, and cryptic abscesses. Plasma tumor necrosis factor alpha, interleukin 1 beta, interleukin 6, and C-reactive protein upregulations were paralleled by the deterioration of intestinal permeability. Calprotectin expression and distribution increased in the intestines and feces of shifted animals, and levels highly correlated with the increases in intestinal inflammation and permeability. CONCLUSIONS Circadian rhythm disruption aggravates DSS-induced colitis, whereas fecal and intestinal calprotectin associates with the severity of disease. Calprotectin might be a useful marker and tool for assessing patients at risk of IBD due to lifestyles with disruptive sleep patterns.
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Affiliation(s)
- Joseph Amara
- Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Youakim Saliba
- Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Joelle Hajal
- Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Viviane Smayra
- Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Jules-Joel Bakhos
- Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Raymond Sayegh
- Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Nassim Fares
- Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon.
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Saliba Y, Jebara V, Hajal J, Maroun R, Chacar S, Smayra V, Abramowitz J, Birnbaumer L, Farès N. Transient Receptor Potential Canonical 3 and Nuclear Factor of Activated T Cells C3 Signaling Pathway Critically Regulates Myocardial Fibrosis. Antioxid Redox Signal 2019; 30:1851-1879. [PMID: 30318928 PMCID: PMC6486676 DOI: 10.1089/ars.2018.7545] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AIMS Cardiac fibroblasts (CFs) are emerging as major contributors to myocardial fibrosis (MF), a final common pathway of many etiologies of heart disease. Here, we studied the functional relevance of transient receptor potential canonical 3 (TRPC3) channels and nuclear factor of activated T cells c3 (NFATc3) signaling in rodent and human ventricular CFs, and whether their modulation would limit MF. RESULTS A positive feedback loop between TRPC3 and NFATc3 drove a rat ventricular CF fibrotic phenotype. In these cells, polyphenols (extract of grape pomace polyphenol [P.E.]) decreased basal and angiotensin II-mediated Ca2+ entries through a direct modulation of TRPC3 channels and subsequently NFATc3 signaling, abrogating myofibroblast differentiation, fibrosis and inflammation, as well as an oxidative stress-associated phenotype. N(ω)-nitro-l-arginine methyl ester (l-NAME) hypertensive rats developed coronary perivascular, sub-epicardial, and interstitial fibrosis with induction of embryonic epicardial progenitor transcription factors in activated CFs. P.E. treatment reduced ventricular CF activation by modulating the TRPC3-NFATc3 pathway, and it ameliorated echocardiographic parameters, cardiac stress markers, and MF in l-NAME hypertensive rats independently of blood pressure regulation. Further, genetic deletion (TRPC3-/-) and pharmacological channel blockade with N-[4-[3,5-Bis(trifluoromethyl)-1H-pyrazol-1-yl]phenyl]-4-methyl-benzenesulfonamide (Pyr10) blunted ventricular CF activation and MF in l-NAME hypertensive mice. Finally, TRPC3 was present in human ventricular CFs and upregulated in MF, whereas pharmacological modulation of TRPC3-NFATc3 decreased proliferation and collagen secretion. Innovation and Conclusion: We demonstrate that TRPC3-NFATc3 signaling is modulated by P.E. and critically regulates ventricular CF phenotype and MF. These findings strongly argue for P.E., through TRPC3 targeting, as potential and interesting therapeutics for MF management.
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Affiliation(s)
- Youakim Saliba
- Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Victor Jebara
- Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Joelle Hajal
- Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Richard Maroun
- Unité de Recherche Technologie et Valorisation Alimentaire, Centre d'Analyses et de Recherche, Faculté des Sciences, Université Saint-Joseph, Beirut, Lebanon
| | - Stéphanie Chacar
- Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
- Unité de Recherche Technologie et Valorisation Alimentaire, Centre d'Analyses et de Recherche, Faculté des Sciences, Université Saint-Joseph, Beirut, Lebanon
| | - Viviane Smayra
- Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Joel Abramowitz
- Neurobiology Laboratory, National Institute of Environmental Health Sciences, Durham, North Carolina
| | - Lutz Birnbaumer
- Neurobiology Laboratory, National Institute of Environmental Health Sciences, Durham, North Carolina
- Institute of Biomedical Research (BIOMED), School of Medicine, Catholic University of Argentina, Buenos Aires, Argentina
| | - Nassim Farès
- Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
- Address correspondence to: Prof. Nassim Farès, Laboratoire de Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine, Université Saint Joseph, Damascus Street, BP 11-5076 - Riad El Solh, Beirut 1107 2180, Lebanon
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Beaini S, Saliba Y, Hajal J, Smayra V, Bakhos JJ, Joubran N, Chelala D, Fares N. VEGF-C attenuates renal damage in salt-sensitive hypertension. J Cell Physiol 2018; 234:9616-9630. [PMID: 30378108 DOI: 10.1002/jcp.27648] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 10/02/2018] [Indexed: 12/18/2022]
Abstract
Salt-sensitive hypertension is a major risk factor for renal impairment leading to chronic kidney disease. High-salt diet leads to hypertonic skin interstitial volume retention enhancing the activation of the tonicity-responsive enhancer-binding protein (TonEBP) within macrophages leading to vascular endothelial growth factor C (VEGF-C) secretion and NOS3 modulation. This promotes skin lymphangiogenesis and blood pressure regulation. Whether VEGF-C administration enhances renal and skin lymphangiogenesis and attenuates renal damage in salt-sensitive hypertension remains to be elucidated. Hypertension was induced in BALB/c mice by a high-salt diet. VEGF-C was administered subcutaneously to high-salt-treated mice as well as control animals. Analyses of kidney injury, inflammation, fibrosis, and biochemical markers were performed in vivo. VEGF-C reduced plasma inflammatory markers in salt-treated mice. In addition, VEGF-C exhibited a renal anti-inflammatory effect with the induction of macrophage M2 phenotype, followed by reductions in interstitial fibrosis. Antioxidant enzymes within the kidney as well as urinary RNA/DNA damage markers were all revelatory of abolished oxidative stress under VEGF-C. Furthermore, VEGF-C decreased the urinary albumin/creatinine ratio and blood pressure as well as glomerular and tubular damages. These improvements were associated with enhanced TonEBP, NOS3, and lymphangiogenesis within the kidney and skin. Our data show that VEGF-C administration plays a major role in preserving renal histology and reducing blood pressure. VEGF-C might constitute an interesting potential therapeutic target for improving renal remodeling in salt-sensitive hypertension.
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Affiliation(s)
- Shadia Beaini
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Youakim Saliba
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Joelle Hajal
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Viviane Smayra
- Divisions of Nephrology and Anatomopathology, Faculty of Medicine, Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
| | - Jules-Joel Bakhos
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Najat Joubran
- Division of Nephrology, Faculty of Medicine and Medical Sciences, Saint Georges Hospital, Balamand University, Beirut, Lebanon
| | - Dania Chelala
- Divisions of Nephrology and Anatomopathology, Faculty of Medicine, Hotel Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
| | - Nassim Fares
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
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Bou Khalil R, Smayra V, Saliba Y, Hajal J, Bakhos JJ, Souaiby L, Richa S, Tamraz J, Farès N. Mifepristone reduces hypothalamo-pituitary-adrenal axis activation and restores weight loss in rats subjected to dietary restriction and methylphenidate administration. Neurosci Res 2017; 135:46-53. [PMID: 29288690 DOI: 10.1016/j.neures.2017.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 12/16/2017] [Accepted: 12/22/2017] [Indexed: 11/16/2022]
Abstract
This study evaluates the efficacy of mifepristone on weight restoration in rats subjected to dietary restriction and methylphenidate administration. 25 female rats aged between 9 and 12 months were divided into 2 groups: 5 controls (exposed only to dietary restriction) and 20 rats that were administered 5 mg/kg/d of methylphenidate before meal exposure, for 36 days. Among rats who responded to methylphenidate (weight loss of 15-25%) weeks after its administration, a group of 6 rats continued to receive only methylphenidate ("Met" group), and another group received 10 mg/kg/d of mifepristone in addition to methylphenidate for 18 days ("Met+Mif" group; n = 6). The mean weight of the "Met+Mif" group remained significantly lower when compared to the control group (87.63 ± 2.83% vs 96.29 ± 3.26%; p < 0.001 respectively) but was significantly higher than that of the "Met" group (87.63 ± 2.83% vs. 80.61 ± 3.52%; p < 0.001 respectively). Plasma concentrations of adiponectin and gene expression of its receptors in rats brain were significantly higher in the "Met" group as compared to the "Met+Mif" and control groups (p < 0.01). Accordingly, mifepristone reduces HPA axis activation and restores weight through adipose tissue recovering. It might be considered a promising treatment for anorexia nervosa patients in future studies.
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Affiliation(s)
- Rami Bou Khalil
- Saint Joseph University, Hôtel Dieu de France Hospital, Department of Psychiatry, Beirut, Lebanon; Saint Joseph University, Research Laboratory in Physiology and Physiopathology, LRPP, Beirut, Lebanon; Saint Joseph University, Faculty of Medicine, Beirut, Lebanon.
| | - Viviane Smayra
- Saint Joseph University, Faculty of Medicine, Beirut, Lebanon
| | - Youakim Saliba
- Saint Joseph University, Research Laboratory in Physiology and Physiopathology, LRPP, Beirut, Lebanon
| | - Joelle Hajal
- Saint Joseph University, Research Laboratory in Physiology and Physiopathology, LRPP, Beirut, Lebanon
| | - Jules-Joël Bakhos
- Saint Joseph University, Research Laboratory in Physiology and Physiopathology, LRPP, Beirut, Lebanon
| | - Lama Souaiby
- National mental health program, Ministry of public health, Beirut, Lebanon
| | - Sami Richa
- Saint Joseph University, Hôtel Dieu de France Hospital, Department of Psychiatry, Beirut, Lebanon; Saint Joseph University, Faculty of Medicine, Beirut, Lebanon; Saint Joseph University, Head of department of Psychiatry, Beirut, Lebanon
| | - Jean Tamraz
- Saint Joseph University, Faculty of Medicine, Beirut, Lebanon; Saint Joseph University, Hôtel Dieu de France Hospital, Department of Neuroimaging, Beirut, Lebanon
| | - Nassim Farès
- Saint Joseph University, Research Laboratory in Physiology and Physiopathology, LRPP, Beirut, Lebanon; Saint Joseph University, Faculty of Medicine, Beirut, Lebanon
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Maalouly G, Ward C, Smayra V, Saliba Y, Aftimos G, Haddad F, Farès N. Fish oil attenuates neurologic severity of antiphospholipid syndrome in a mice experimental model. Nutr Neurosci 2016; 20:563-570. [PMID: 27426873 DOI: 10.1080/1028415x.2016.1206165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
INTRODUCTION Murine experimental models of antiphospholipid syndrome (eAPLS) showed neurologic dysfunction and therapeutic effect of the anticoagulant enoxaparin is well established. Omega-3 fatty acids and curcumin, tested in neuroinflammation and auto-immunity diseases, might be interesting therapeutic candidates. The aim of this study was to evaluate the effects of these candidates on neurologic severity in eAPLS. METHODS One month after immunization of BALB/c mice with beta-2-glycoprotein I, daily treatments were initiated with enoxaparin (1 mg/kg), omega-3 fatty acids (0.5 g/kg), and curcumin (200 mg/kg) for 3 months. RESULTS Mortality was significantly decreased by enoxaparin and omega-3 treatments. Fish oil and curcumin group exhibited the highest mean of swimming behavior in forced swim test in surviving mice. Mice under omega-3 fatty acids or curcumin presented low anxiety-like behavior in the elevated plus-maze test. Cerebral histopathology revealed heavy inflammatory infiltrates in cortical and subcortical regions with vacuolization, swelling, and degeneration of astrocytes in the control group, with aggravation under curcumin; no infiltrate was retrieved in enoxaparin and omega-3 groups. CONCLUSION Our study is the first to demonstrate a potential therapeutic effect of omega-3 fatty acids in eAPLS. Enoxaparin and omega-3 fatty acids combination would be interesting for further investigation.
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Affiliation(s)
- Georges Maalouly
- a Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine , Université Saint Joseph , Beirut , Lebanon
| | - Céline Ward
- b Faculté de Médecine , Université Saint Joseph , Beirut , Lebanon
| | - Viviane Smayra
- c Faculté de Médecine, service d'anatomopathologie , Université Saint Joseph , Beirut , Lebanon
| | - Youakim Saliba
- a Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine , Université Saint Joseph , Beirut , Lebanon
| | | | - Fadi Haddad
- e Faculté de Médecine, Département de Médecine interne , Université Saint Joseph , Beirut , Lebanon
| | - Nassim Farès
- a Laboratoire de Recherche en Physiologie et Physiopathologie, Pôle Technologie Santé, Faculté de Médecine , Université Saint Joseph , Beirut , Lebanon
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Saliba Y, Karam R, Smayra V, Aftimos G, Abramowitz J, Birnbaumer L, Farès N. Evidence of a Role for Fibroblast Transient Receptor Potential Canonical 3 Ca2+ Channel in Renal Fibrosis. J Am Soc Nephrol 2015; 26:1855-76. [PMID: 25479966 PMCID: PMC4520158 DOI: 10.1681/asn.2014010065] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 09/23/2014] [Indexed: 01/04/2023] Open
Abstract
Transient receptor potential canonical (TRPC) Ca(2+)-permeant channels, especially TRPC3, are increasingly implicated in cardiorenal diseases. We studied the possible role of fibroblast TRPC3 in the development of renal fibrosis. In vitro, a macromolecular complex formed by TRPC1/TRPC3/TRPC6 existed in isolated cultured rat renal fibroblasts. However, specific blockade of TRPC3 with the pharmacologic inhibitor pyr3 was sufficient to inhibit both angiotensin II- and 1-oleoyl-2-acetyl-sn-glycerol-induced Ca(2+) entry in these cells, which was detected by fura-2 Ca(2+) imaging. TRPC3 blockade or Ca(2+) removal inhibited fibroblast proliferation and myofibroblast differentiation by suppressing the phosphorylation of extracellular signal-regulated kinase (ERK1/2). In addition, pyr3 inhibited fibrosis and inflammation-associated markers in a noncytotoxic manner. Furthermore, TRPC3 knockdown by siRNA confirmed these pharmacologic findings. In adult male Wistar rats or wild-type mice subjected to unilateral ureteral obstruction, TRPC3 expression increased in the fibroblasts of obstructed kidneys and was associated with increased Ca(2+) entry, ERK1/2 phosphorylation, and fibroblast proliferation. Both TRPC3 blockade in rats and TRPC3 knockout in mice inhibited ERK1/2 phosphorylation and fibroblast activation as well as myofibroblast differentiation and extracellular matrix remodeling in obstructed kidneys, thus ameliorating tubulointerstitial damage and renal fibrosis. In conclusion, TRPC3 channels are present in renal fibroblasts and control fibroblast proliferation, differentiation, and activation through Ca(2+)-mediated ERK signaling. TRPC3 channels might constitute important therapeutic targets for improving renal remodeling in kidney disease.
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Affiliation(s)
- Youakim Saliba
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine and
| | - Ralph Karam
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine and
| | - Viviane Smayra
- Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Georges Aftimos
- Department of Anatomopathology, National Institute of Pathology, Baabda, Lebanon; and
| | - Joel Abramowitz
- Laboratory of Neurobiology, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Lutz Birnbaumer
- Laboratory of Neurobiology, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Nassim Farès
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine and
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Slim R, Hachem N, Smayra V, Yaghi C, Daniel F, Boujaoude J, Honein K, Sayegh R, Ghosn M. Education and Imaging. Hepatobiliary and pancreatic: peliosis hepatis associated with multiple myeloma. J Gastroenterol Hepatol 2014; 29:5. [PMID: 24354992 DOI: 10.1111/jgh.12469] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- R Slim
- Department of Gastroenterology, Hotel-Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon
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Nader L, Smayra V, Jebara V, Bois P, Potreau D, Fares N. Brain natriuretic peptide secretion in adult rat heart muscle cells: The role of calcium channels. Arch Cardiovasc Dis 2008; 101:459-63. [DOI: 10.1016/j.acvd.2008.05.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2008] [Revised: 05/14/2008] [Accepted: 05/19/2008] [Indexed: 11/26/2022]
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