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Mitronova GY, Quentin C, Belov VN, Wegener JW, Kiszka KA, Lehnart SE. 1,4-Benzothiazepines with Cyclopropanol Groups and Their Structural Analogues Exhibit Both RyR2-Stabilizing and SERCA2a-Stimulating Activities. J Med Chem 2023; 66:15761-15775. [PMID: 37991191 PMCID: PMC10726367 DOI: 10.1021/acs.jmedchem.3c01235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/24/2023] [Accepted: 11/07/2023] [Indexed: 11/23/2023]
Abstract
To discover new multifunctional agents for the treatment of cardiovascular diseases, we designed and synthesized a series of compounds with a cyclopropyl alcohol moiety and evaluated them in biochemical assays. Biological screening identified derivatives with dual activity: preventing Ca2+ leak through ryanodine receptor 2 (RyR2) and enhancing cardiac sarco-endoplasmic reticulum (SR) Ca2+ load by activation of Ca2+-dependent ATPase 2a (SERCA2a). The compounds that stabilize RyR2 at micro- and nanomolar concentrations are either structurally related to RyR-stabilizing drugs or Rycals or have structures similar to them. The novel compounds also demonstrate a good ability to increase ATP hydrolysis mediated by SERCA2a activity in cardiac microsomes, e.g., the half-maximal effective concentration (EC50) was as low as 383 nM for compound 12a, which is 1,4-benzothiazepine with two cyclopropanol groups. Our findings indicate that these derivatives can be considered as new lead compounds to improve cardiac function in heart failure.
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Affiliation(s)
- Gyuzel Y. Mitronova
- Department
of NanoBiophotonics, Max Planck Institute
for Multidisciplinary Sciences, Am Fassberg 11, Göttingen 37077, Germany
- German
Centre for Cardiovascular Research (DZHK), Partner Site Göttingen, Göttingen 37075, Germany
| | - Christine Quentin
- Department
of NanoBiophotonics, Max Planck Institute
for Multidisciplinary Sciences, Am Fassberg 11, Göttingen 37077, Germany
| | - Vladimir N. Belov
- Department
of NanoBiophotonics, Max Planck Institute
for Multidisciplinary Sciences, Am Fassberg 11, Göttingen 37077, Germany
| | - Jörg W. Wegener
- Department
of Cardiology & Pulmonology, Heart Research Center Göttingen, University Medical Center Göttingen, Robert-Koch-Strasse 42a, Göttingen 37075, Germany
- German
Centre for Cardiovascular Research (DZHK), Partner Site Göttingen, Göttingen 37075, Germany
| | - Kamila A. Kiszka
- Department
of NanoBiophotonics, Max Planck Institute
for Multidisciplinary Sciences, Am Fassberg 11, Göttingen 37077, Germany
| | - Stephan E. Lehnart
- Department
of Cardiology & Pulmonology, Heart Research Center Göttingen, University Medical Center Göttingen, Robert-Koch-Strasse 42a, Göttingen 37075, Germany
- German
Centre for Cardiovascular Research (DZHK), Partner Site Göttingen, Göttingen 37075, Germany
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2
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Husseiny EM, Abulkhair HS, Saleh A, Altwaijry N, Zidan RA, Abdulrahman FG. Molecular overlay-guided design of new CDK2 inhibitor thiazepinopurines: Synthesis, anticancer, and mechanistic investigations. Bioorg Chem 2023; 140:106789. [PMID: 37611530 DOI: 10.1016/j.bioorg.2023.106789] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 04/27/2023] [Revised: 08/08/2023] [Accepted: 08/14/2023] [Indexed: 08/25/2023]
Abstract
Adopting the molecular overlay approach, three novel sets of thiazepinopurines with expected cytotoxicity and CDK2 inhibition potential were designed and synthesized. This was accomplished through the heteroannelation of purines, for the first time, with thiazepine. The obtained thiazepinopurines derivatives were assessed for their cytotoxicity toward tumor cells of three different types, HepG2, MCF-7, and PC-3 as well as one normal cell (WI38). Among the studied compounds, 3b and 3c exhibited significant antiproliferative activity against tumor cells presenting IC50 range of 5.52-17.09 µM in comparison with Roscovitine (9.32-13.82 µM). Additionally, both compounds displayed superior selectivity indices (SI = 3.00-7.15) toward tested cancer cells. The 4-chlorophenyl analog 3b has shown the best selectivity index, and hence it has been subjected to additional investigations to determine its proper mechanistic effect. Accordingly, the CDK2 inhibition potential, apoptosis induction, and cell cycle analysis of MCF-7 were evaluated. Results revealed that this analog displayed a potent CDK2 inhibition potential with an IC50 value of 0.219 µM. Findings also showed that 3b was thought to arrest MCF-7 cell cycle at S phase together with apoptosis induction by the increased expression of Bax, Caspase-8, and -9 markers with a concomitant decrease in Bcl-2 expression. Besides, the probable interaction of 3b with CDK2 binding pocket was investigated by molecular docking.
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Affiliation(s)
- Ebtehal M Husseiny
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy (Girls), Al-Azhar University, Nasr City 11754, Cairo, Egypt
| | - Hamada S Abulkhair
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Nasr City 11884, Cairo, Egypt; Pharmaceutical Chemistry Department, Faculty of Pharmacy, Horus University-Egypt, International Coastal Road, New Damietta 34518, Egypt
| | - Asmaa Saleh
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
| | - Najla Altwaijry
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Riham A Zidan
- Department of Biochemistry, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo, Egypt
| | - Fatma G Abdulrahman
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy (Girls), Al-Azhar University, Nasr City 11754, Cairo, Egypt
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3
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Morais FA, Lemos IS, Matiola RT, Freitas MLS, Alano CG, Cabral J, Wessler LB, Generoso JS, Scaini G, Réus GZ, Streck EL. Coadministration of tianeptine alters behavioral parameters and levels of neurotrophins in a chronic model of Maple Syrup Urine disease. Metab Brain Dis 2022; 37:1585-1596. [PMID: 35394251 DOI: 10.1007/s11011-022-00969-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 10/21/2021] [Accepted: 03/21/2022] [Indexed: 10/18/2022]
Abstract
Maple Syrup Urine Disease (MSUD) is caused by the deficiency in the activity of the branched-chain α-ketoacid dehydrogenase complex (BCKDC), resulting in the accumulation of the branched-chain amino acids (BCAA) leucine, isoleucine, and valine, and their respective branched-chain α-keto acids. Patients with MSUD are at high risk of developing chronic neuropsychiatric disorders; however, the pathophysiology of brain damage in these patients remains unclear. We hypothesize that MSUD can cause depressive symptoms in patients. To test our hypothesis, Wistar rats were submitted to the BCAA and tianeptine (antidepressant) administration for 21 days, starting seven days postnatal. Depression-like symptoms were assessed by testing for anhedonia and forced swimming after treatments. After the last test, the brain structures were dissected for the evaluation of neutrophins. We demonstrate that chronic BCAA administration induced depressive-like behavior, increased BDNF levels, and decreased NGF levels, suggesting a relationship between BCAA toxicity and brain damage, as observed in patients with MSUD. However, the administration of tianeptine was effective in preventing behavioral changes and restoring neurotrophins levels.
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Affiliation(s)
- Fábio A Morais
- Laboratório de Doenças Neurometabólicas, Laboratório de Neurologia Experimental, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil
| | - Isabela S Lemos
- Laboratório de Doenças Neurometabólicas, Laboratório de Neurologia Experimental, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil
| | - Rafaela T Matiola
- Laboratório de Doenças Neurometabólicas, Laboratório de Neurologia Experimental, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil
| | - Maria Luísa S Freitas
- Laboratório de Doenças Neurometabólicas, Laboratório de Neurologia Experimental, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil
| | - Carolina G Alano
- Laboratório de Doenças Neurometabólicas, Laboratório de Neurologia Experimental, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil
| | - Julia Cabral
- Laboratório de Doenças Neurometabólicas, Laboratório de Neurologia Experimental, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil
| | - Leticia B Wessler
- Laboratório de Doenças Neurometabólicas, Laboratório de Neurologia Experimental, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil
| | - Jaqueline S Generoso
- Translational Psychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Giselli Scaini
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil
| | - Gislaine Z Réus
- Laboratório de Psiquiatria Translacional, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil
| | - Emilio L Streck
- Laboratório de Doenças Neurometabólicas, Laboratório de Neurologia Experimental, Programa de Pós-Graduação Em Ciências da Saúde, Universidade Do Extremo Sul Catarinense, Criciúma, SC, Brasil.
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Keilhoff G, Pinkernelle J, Fansa H. The Ryanodine receptor stabilizer S107 fails to support motor neuronal neuritogenesis in vitro. Tissue Cell 2021; 73:101625. [PMID: 34419737 DOI: 10.1016/j.tice.2021.101625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 06/11/2021] [Revised: 08/02/2021] [Accepted: 08/15/2021] [Indexed: 11/30/2022]
Abstract
Calcium homeostasis is essential for neuronal cell survival/differentiation. Imbalance of the Ca2+ homeostasis due to excessive Ca2+ overload is essential for spinal cord injury (SCI). The overload resulted from Ca2+ flux across the plasma membrane and from internal Ca2+ store release (mitochondria, endoplasmic reticulum, ER). Inositol trisphosphate receptors (IP3R) and ryanodine receptors (RyR) are involved in releasing Ca2+ from ER contributing to axonal degeneration following SCI. In turn, block of both receptors is axoprotective. The calstabin RyR subunit, stabilizing the channel in a state of reduced activity, prevents pathological Ca2+ release too. We investigated whether S107, a RyR-stabilizing compound (Rycal), is beneficial for survival and neuritogenesis of spinal cord motor neurons in vitro. We used a spinal cord slice model and the motor neuron-like NSC-34 cell line. Effects of S107 were tested by propidium iodide/fluorescein diacetate vital staining, mitotic index determination via BrdU-incorporation, and neurite sprouting parameters. Results showed that S107 (i) had no effect on gliosis resulting from slices preparation; (ii) had no effect on motor neuronal survival and proliferation; and (iii) impaired neurite sprouting, no matter whether it was a differentiation (NSC-34 cells) or regeneration (spinal cord slices) process. The results underline the need for a flexible Ca2+homeostasis provided by the ER for re-initiation of neuritogenesis.
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Affiliation(s)
- Gerburg Keilhoff
- Institute of Biochemistry and Cell Biology, Medical Faculty, University of Magdeburg, 39120, Magdeburg, Germany.
| | - Josephine Pinkernelle
- Institute of Biochemistry and Cell Biology, Medical Faculty, University of Magdeburg, 39120, Magdeburg, Germany
| | - Hisham Fansa
- Department of Plastic, Reconstructive, and Aesthetic Surgery, Hand Surgery, Klinikum Bielefeld, OWL-University, 33604, Bielefeld, Germany; Department of Plastic Surgery, and Breast Centre, Spital Zollikerberg, 8125, Zollikerberg, Switzerland
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5
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Pekarskaya EA, Holt ES, Gingrich JA, Ansorge MS, Javitch JA, Canetta SE. Tianeptine, but not fluoxetine, decreases avoidant behavior in a mouse model of early developmental exposure to fluoxetine. Sci Rep 2021; 11:22852. [PMID: 34819526 PMCID: PMC8613176 DOI: 10.1038/s41598-021-02074-9] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 10/14/2021] [Indexed: 01/12/2023] Open
Abstract
Depression and anxiety, two of the most common mental health disorders, share common symptoms and treatments. Most pharmacological agents available to treat these disorders target monoamine systems. Currently, finding the most effective treatment for an individual is a process of trial and error. To better understand how disease etiology may predict treatment response, we studied mice exposed developmentally to the selective serotonin reuptake inhibitor (SSRI) fluoxetine (FLX). These mice show the murine equivalent of anxiety- and depression-like symptoms in adulthood and here we report that these mice are also behaviorally resistant to the antidepressant-like effects of adult SSRI administration. We investigated whether tianeptine (TIA), which exerts its therapeutic effects through agonism of the mu-opioid receptor instead of targeting monoaminergic systems, would be more effective in this model. We found that C57BL/6J pups exposed to FLX from postnatal day 2 to 11 (PNFLX, the mouse equivalent in terms of brain development to the human third trimester) showed increased avoidant behaviors as adults that failed to improve, or were even exacerbated, by chronic SSRI treatment. By contrast, avoidant behaviors in these same mice were drastically improved following chronic treatment with TIA. Overall, this demonstrates that TIA may be a promising alternative treatment for patients that fail to respond to typical antidepressants, especially in patients whose serotonergic system has been altered by in utero exposure to SSRIs.
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Affiliation(s)
- Elizabeth A Pekarskaya
- Department of Neuroscience, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
- Division of Molecular Therapeutics, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
| | - Emma S Holt
- Division of Molecular Therapeutics, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
- Division of Developmental Neuroscience, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
| | - Jay A Gingrich
- Division of Developmental Neuroscience, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
- Sackler Institute for Developmental Psychobiology, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
| | - Mark S Ansorge
- Division of Developmental Neuroscience, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
- Sackler Institute for Developmental Psychobiology, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
| | - Jonathan A Javitch
- Division of Molecular Therapeutics, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA.
- Department of Molecular Pharmacology and Therapeutics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA.
| | - Sarah E Canetta
- Division of Molecular Therapeutics, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA.
- Division of Developmental Neuroscience, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA.
- Sackler Institute for Developmental Psychobiology, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA.
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6
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Perić I, Costina V, Djordjević S, Gass P, Findeisen P, Inta D, Borgwardt S, Filipović D. Tianeptine modulates synaptic vesicle dynamics and favors synaptic mitochondria processes in socially isolated rats. Sci Rep 2021; 11:17747. [PMID: 34493757 PMCID: PMC8423821 DOI: 10.1038/s41598-021-97186-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 08/09/2021] [Indexed: 11/09/2022] Open
Abstract
Deregulation of synaptic function and neurotransmission has been linked with the development of major depression disorder (MDD). Tianeptine (Tian) has been used as antidepressant with anxiolytic properties and recently as a nootropic to improve cognitive performance, but its mechanism of action is unknown. We conducted a proteomic study on the hippocampal synaptosomal fractions of adult male Wistar rats exposed to chronic social isolation (CSIS, 6 weeks), an animal model of depression and after chronic Tian treatment in controls (nootropic effect) and CSIS-exposed rats (lasting 3 weeks of 6-week CSIS) (therapeutic effect). Increased expression of Syn1 and Camk2-related neurotransmission, vesicle transport and energy processes in Tian-treated controls were found. CSIS led to upregulation of proteins associated with actin cytoskeleton, signaling transduction and glucose metabolism. In CSIS rats, Tian up-regulated proteins involved in mitochondrial energy production, mitochondrial transport and dynamics, antioxidative defense and glutamate clearance, while attenuating the CSIS-increased glycolytic pathway and cytoskeleton organization proteins expression and decreased the expression of proteins involved in V-ATPase and vesicle endocytosis. Our overall findings revealed that synaptic vesicle dynamics, specifically exocytosis, and mitochondria-related energy processes might be key biological pathways modulated by the effective nootropic and antidepressant treatment with Tian and be a potential target for therapeutic efficacy of the stress-related mood disorders.
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Affiliation(s)
- Ivana Perić
- Department of Molecular Biology and Endocrinology, "VINČA", Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Victor Costina
- Institute for Clinical Chemistry, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, 68159, Mannheim, Germany
| | | | - Peter Gass
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159, Mannheim, Germany
| | - Peter Findeisen
- Institute for Clinical Chemistry, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, 68159, Mannheim, Germany
| | - Dragoš Inta
- Department of Psychiatry (UPK), University of Basel, Basel, Switzerland
| | - Stefan Borgwardt
- Department of Psychiatry and Psychotherapy, University of Lübeck, Lübeck, Germany
| | - Dragana Filipović
- Department of Molecular Biology and Endocrinology, "VINČA", Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia.
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Alves-Lopes R, Montezano AC, Neves KB, Harvey A, Rios FJ, Skiba DS, Arendse LB, Guzik TJ, Graham D, Poglitsch M, Sturrock E, Touyz RM. Selective Inhibition of the C-Domain of ACE (Angiotensin-Converting Enzyme) Combined With Inhibition of NEP (Neprilysin): A Potential New Therapy for Hypertension. Hypertension 2021; 78:604-616. [PMID: 34304582 PMCID: PMC8357049 DOI: 10.1161/hypertensionaha.121.17041] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 06/25/2021] [Indexed: 12/11/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Rhéure Alves-Lopes
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (R.A.-L., A.C.M., K.B.N., A.H., F.J.R., D.S.S., T.J.G., D.G., R.M.T.)
| | - Augusto C. Montezano
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (R.A.-L., A.C.M., K.B.N., A.H., F.J.R., D.S.S., T.J.G., D.G., R.M.T.)
| | - Karla B. Neves
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (R.A.-L., A.C.M., K.B.N., A.H., F.J.R., D.S.S., T.J.G., D.G., R.M.T.)
| | - Adam Harvey
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (R.A.-L., A.C.M., K.B.N., A.H., F.J.R., D.S.S., T.J.G., D.G., R.M.T.)
| | - Francisco J. Rios
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (R.A.-L., A.C.M., K.B.N., A.H., F.J.R., D.S.S., T.J.G., D.G., R.M.T.)
| | - Dominik S. Skiba
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (R.A.-L., A.C.M., K.B.N., A.H., F.J.R., D.S.S., T.J.G., D.G., R.M.T.)
| | - Lauren B. Arendse
- Institute of Infectious Disease and Molecular Medicine and Division of Medical Biochemistry, University of Cape Town, South Africa (L.B.A., E.S.)
| | - Tomasz J. Guzik
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (R.A.-L., A.C.M., K.B.N., A.H., F.J.R., D.S.S., T.J.G., D.G., R.M.T.)
| | - Delyth Graham
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (R.A.-L., A.C.M., K.B.N., A.H., F.J.R., D.S.S., T.J.G., D.G., R.M.T.)
| | | | - Edward Sturrock
- Institute of Infectious Disease and Molecular Medicine and Division of Medical Biochemistry, University of Cape Town, South Africa (L.B.A., E.S.)
| | - Rhian M. Touyz
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (R.A.-L., A.C.M., K.B.N., A.H., F.J.R., D.S.S., T.J.G., D.G., R.M.T.)
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8
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Guo W, Zhu C, Yin Z, Zhang Y, Wang C, Walk AS, Lin Y, McKinsey TA, Woulfe KC, Ren J, Chew HG. The ryanodine receptor stabilizer S107 ameliorates contractility of adult Rbm20 knockout rat cardiomyocytes. Physiol Rep 2021; 9:e15011. [PMID: 34523260 PMCID: PMC8440945 DOI: 10.14814/phy2.15011] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 07/27/2021] [Accepted: 07/31/2021] [Indexed: 02/07/2023] Open
Abstract
RNA binding motif 20 (RBM20) cardiomyopathy has been detected in approximately 3% of populations afflicted with dilated cardiomyopathy (DCM). It is well conceived that RBM20 cardiomyopathy is provoked by titin isoform switching in combination with resting Ca2+ leaking. In this study, we characterized the cardiac function in Rbm20 knockout (KO) rats at 3-, 6-, 9-, and 12-months of age and examined the effect of the ryanodine receptor stabilizer S107 on resting intracellular levels and cardiomyocyte contractile properties. Our results revealed that even though Rbm20 depletion promoted expression of larger titin isoform and reduced myocardial stiffness in young rats (3 months of age), the established DCM phenotype required more time to embellish. S107 restored elevated intracellular Ca2+ to normal levels and ameliorated cardiomyocyte contractile properties in isolated cardiomyocytes from 6-month-old Rbm20 KO rats. However, S107 failed to preserve cardiac homeostasis in Rbm20 KO rats at 12 months of age, unexpectedly, likely due to the existence of multiple pathogenic mechanisms. Taken together, our data suggest the therapeutic promises of S107 in the management of RBM20 cardiomyopathy.
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Affiliation(s)
- Wei Guo
- Department of Animal and Dairy SciencesUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Chaoqun Zhu
- Department of Animal ScienceUniversity of WyomingLaramieWyomingUSA
- Department of PharmacologyUniversity of CaliforniaDavisCalifornia95616USA
| | - Zhiyong Yin
- Department of Animal ScienceUniversity of WyomingLaramieWyomingUSA
- Department of Cardiovascular MedicineXijing HospitalFourth Military Medical University15 Changle West RoadXi'anShanxiChina
| | - Yanghai Zhang
- Department of Animal and Dairy SciencesUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Chunyan Wang
- Department of Animal and Dairy SciencesUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | | | - Ying‐Hsi Lin
- Division of Cardiology, and Consortium for Fibrosis Research & TranslationDepartment of MedicineUniversity of Colorado Anschutz Medical CampusAuroraColoradoUSA
| | - Timothy A. McKinsey
- Division of Cardiology, and Consortium for Fibrosis Research & TranslationDepartment of MedicineUniversity of Colorado Anschutz Medical CampusAuroraColoradoUSA
| | - Kathleen C. Woulfe
- Division of Cardiology, and Consortium for Fibrosis Research & TranslationDepartment of MedicineUniversity of Colorado Anschutz Medical CampusAuroraColoradoUSA
| | - Jun Ren
- School of PharmacyUniversity of WyomingLaramieWyomingUSA
| | - Herbert G. Chew
- Department of BiologyWestern Wyoming CollegeRock SpringsWyomingUSA
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9
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Matye DJ, Li Y, Chen C, Chao X, Wang H, Ni H, Ding WX, Li T. Gut-restricted apical sodium-dependent bile acid transporter inhibitor attenuates alcohol-induced liver steatosis and injury in mice. Alcohol Clin Exp Res 2021; 45:1188-1199. [PMID: 33885179 PMCID: PMC8717856 DOI: 10.1111/acer.14619] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/05/2021] [Accepted: 04/13/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND Recent studies have shown that human and experimental alcohol-related liver disease (ALD) is robustly associated with dysregulation of bile acid homeostasis, which may in turn modulate disease severity. Pharmacological agents targeting bile acid metabolism and signaling may be potential therapeutics for ALD. METHODS The potential beneficial effects of a gut-restricted apical sodium-dependent bile acid transporter (ASBT) inhibitor were studied in a chronic-plus-binge ALD mouse model. RESULTS Blocking intestinal bile acid reabsorption by the gut-restricted ASBT inhibitor GSK2330672 attenuated hepatic steatosis and liver injury in a chronic-plus-binge ALD mouse model. Alcohol feeding is associated with intestinal bile acid accumulation but paradoxically impaired ileal farnesoid × receptor (FXR) function, and repressed hepatic cholesterol 7α-hydrolase (CYP7A1) expression despite decreased hepatic small heterodimer partner (SHP) and ileal fibroblast growth factor 15 (FGF15) expression. ASBT inhibitor treatment decreased intestinal bile acid accumulation and increased hepatic CYP7A1 expression, but further decreased ileal FXR activity. Alcohol feeding induces serum bile acid concentration that strongly correlates with a liver injury marker. However, alcohol-induced serum bile acid elevation is not due to intrahepatic bile acid accumulation but is strongly and positively associated with hepatic multidrug resistance-associated protein 3 (MRP4) and MRP4 induction but poorly associated with sodium-taurocholate cotransporting peptide (NTCP) expression. ASBT inhibitor treatment decreases serum bile acid concentration without affecting hepatocyte basolateral bile acid uptake and efflux transporters. CONCLUSION ASBT inhibitor treatment corrects alcohol-induced bile acid dysregulation and attenuates liver injury in experimental ALD.
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Affiliation(s)
- David J. Matye
- Harold Hamm Diabetes Center, Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
- Department of Pharmacology, Toxicology, Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160
| | - Yuan Li
- Department of Pharmacology, Toxicology, Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160
| | - Cheng Chen
- Harold Hamm Diabetes Center, Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
| | - Xiaojuan Chao
- Department of Pharmacology, Toxicology, Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160
| | - Huaiwen Wang
- Laboratory For Molecular Biology and Cytometry Research, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
| | - Hongmin Ni
- Department of Pharmacology, Toxicology, Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160
| | - Wen-Xing Ding
- Department of Pharmacology, Toxicology, Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160
| | - Tiangang Li
- Harold Hamm Diabetes Center, Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
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10
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Matye DJ, Wang H, Luo W, Sharp RR, Chen C, Gu L, Jones KL, Ding WX, Friedman JE, Li T. Combined ASBT Inhibitor and FGF15 Treatment Improves Therapeutic Efficacy in Experimental Nonalcoholic Steatohepatitis. Cell Mol Gastroenterol Hepatol 2021; 12:1001-1019. [PMID: 33965587 PMCID: PMC8346663 DOI: 10.1016/j.jcmgh.2021.04.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/24/2021] [Accepted: 04/26/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Pharmacologic agents targeting bile acid signaling show promise for treating nonalcoholic steatohepatitis (NASH). However, clinical findings suggest that new treatment strategies with enhanced therapeutic efficacy and minimized undesired effects are needed. This preclinical study investigates whether combining an apical sodium-bile acid transporter (ASBT) inhibitor GSK233072 (GSK672) and fibroblast growth factor-15 (FGF15) signaling activation improves anti-NASH efficacy. METHODS Mice with high fat, cholesterol, and fructose (HFCFr) diet-induced NASH and stage 2 fibrosis are used as a NASH model. GSK672 or AAV8-TBG-FGF15 interventions are administered alone or in combination to HFCFr diet-fed mice. RESULTS The combined treatment significantly enhances therapeutic efficacy against steatosis, inflammation, ballooning, and fibrosis than either single treatment. Mechanistically, the synergistic actions of GSK672 and FGF15 on inhibiting gut bile acid reuptake and hepatic bile acid synthesis achieve greater magnitude of bile acid pool reduction that not only decreases bile acid burden in NASH livers but also limits intestinal lipid absorption, which, together with FGF15 signaling activation, produces weight loss, reduction of adipose inflammation, and attenuated hepatocellular organelle stress. Furthermore, the combined treatment attenuates increased fecal bile acid excretion and repressed bile acid synthesis, which underlie diarrhea and hypercholesterolemia associated with ASBT inhibition and FGF19 analogue, respectively, in clinical settings. CONCLUSIONS Concomitant ASBT inhibition and FGF15 signaling activation produce metabolic changes that partially mimic the bariatric surgery condition whereby lipid malabsorption and increased FGF15/19 signaling synergistically mediate weight loss and metabolic improvement. Further clinical studies may be warranted to investigate whether combining ASBT inhibitor and FGF19 analogue enhances anti-NASH efficacy and reduced treatment-associated adverse events in humans.
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Affiliation(s)
- David J Matye
- Harold Hamm Diabetes Center, Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; Department of Pharmacology, Toxicology, Therapeutics, University of Kansas Medical Center, Kansas City, Kansas
| | - Huaiwen Wang
- Laboratory for Molecular Biology and Cytometry Research, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Wenyi Luo
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Rachel R Sharp
- Laboratory for Molecular Biology and Cytometry Research, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; Harold Hamm Diabetes Center, Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Cheng Chen
- Harold Hamm Diabetes Center, Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Lijie Gu
- Harold Hamm Diabetes Center, Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Kenneth L Jones
- Laboratory for Molecular Biology and Cytometry Research, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; Harold Hamm Diabetes Center, Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Wen-Xing Ding
- Department of Pharmacology, Toxicology, Therapeutics, University of Kansas Medical Center, Kansas City, Kansas
| | - Jacob E Friedman
- Harold Hamm Diabetes Center, Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Tiangang Li
- Harold Hamm Diabetes Center, Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
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Gao Y, Cao J, Xing P, Altmeyer R, Zhang Y. Evaluation of Small Molecule Combinations against Respiratory Syncytial Virus In Vitro. Molecules 2021; 26:molecules26092607. [PMID: 33946996 PMCID: PMC8125180 DOI: 10.3390/molecules26092607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/03/2021] [Accepted: 04/21/2021] [Indexed: 11/16/2022] Open
Abstract
Respiratory syncytial virus (RSV) is a major pathogen that causes severe lower respiratory tract infection in infants, the elderly and the immunocompromised worldwide. At present no approved specific drugs or vaccines are available to treat this pathogen. Recently, several promising candidates targeting RSV entry and multiplication steps are under investigation. However, it is possible to lead to drug resistance under the long-term treatment. Therapeutic combinations constitute an alternative to prevent resistance and reduce antiviral doses. Therefore, we tested in vitro two-drug combinations of fusion inhibitors (GS5806, Ziresovir and BMS433771) and RNA-dependent RNA polymerase complex (RdRp) inhibitors (ALS8176, RSV604, and Cyclopamine). The statistical program MacSynergy II was employed to determine synergism, additivity or antagonism between drugs. From the result, we found that combinations of ALS8176 and Ziresovir or GS5806 exhibit additive effects against RSV in vitro, with interaction volume of 50 µM2% and 31 µM2% at 95% confidence interval, respectively. On the other hand, all combinations between fusion inhibitors showed antagonistic effects against RSV in vitro, with volume of antagonism ranging from −50 µM2 % to −176 µM2 % at 95% confidence interval. Over all, our results suggest the potentially therapeutic combinations in combating RSV in vitro could be considered for further animal and clinical evaluations.
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12
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Wang B, Wang LR, Liu LL, Wang W, Man RJ, Zheng DJ, Deng YS, Yang YS, Xu C, Zhu HL. A novel series of benzothiazepine derivatives as tubulin polymerization inhibitors with anti-tumor potency. Bioorg Chem 2021; 108:104585. [PMID: 33508676 DOI: 10.1016/j.bioorg.2020.104585] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/18/2020] [Accepted: 12/21/2020] [Indexed: 01/12/2023]
Abstract
In this work, a series of diaryl benzo[b][1,4]thiazepine derivatives D1-D36 were synthesized and screened as tubulin polymerization inhibitors with anti-tumor potency. They were designed by introducing the seven-member ring benzothiazepine as the linker for CA-4 modification for the first time. Among them, the hit compound D8 showed potential on inhibiting the growth of several cancer cell lines (IC50 values: 1.48 μM for HeLa, 1.47 μM for MCF-7, 1.52 μM for HT29 and 1.94 μM for A549), being comparable with the positive controls Colchicine and CA-4P. The calculated IC50 value of D8 as an tubulin polymerization inhibitor was 1.20 μM. The results of the flow cytometry assay revealed that D8 could induce the mitotic catastrophe and the death of living cancer cells. D8 also indicated the anti-vascular activity. The possible binding pattern was implied by docking simulation, inferring the possibility of introducing interactions with the nearby tubulin chain. Since the novel structural trial has been conducted with preliminary discussion, this work might stimulate new ideas in further modification of tubulin-related anti-cancer agents and therapeutic approaches.
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Affiliation(s)
- Bin Wang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Li-Ren Wang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Lu-Lu Liu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Wei Wang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Ruo-Jun Man
- Guangxi Biological Polysaccharide Separation, Purification and Modification Research Platform, Guangxi University for Nationalities, Nanning 530006, China
| | - Da-Jun Zheng
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Yu-Shan Deng
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Yu-Shun Yang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China.
| | - Chen Xu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China.
| | - Hai-Liang Zhu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China.
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13
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Lee SH, Lutz D, Drexler D, Frotscher M, Shen J. Differential modulation of short-term plasticity at hippocampal mossy fiber and Schaffer collateral synapses by mitochondrial Ca2. PLoS One 2020; 15:e0240610. [PMID: 33049001 PMCID: PMC7553293 DOI: 10.1371/journal.pone.0240610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 09/29/2020] [Indexed: 11/19/2022] Open
Abstract
Presynaptic mitochondrial Ca2+ plays a critical role in the regulation of synaptic transmission and plasticity. The presynaptic bouton of the hippocampal mossy fiber (MF) is much larger in size than that of the Schaffer collateral (SC) synapse. Here we compare the structural and physiological characteristics of MF and SC presynaptic boutons to reveal functional and mechanistic differences between these two synapses. Our quantitative ultrastructural analysis using electron microscopy show many more mitochondria in MF presynaptic bouton cross-section profiles compared to SC boutons. Consistent with these results, post-tetanic potentiation (PTP), a form of presynaptic short-term plasticity dependent on mitochondrial Ca2+, is reduced by inhibition of mitochondrial Ca2+ release at MF synapses but not at SC synapses. However, blockade of mitochondrial Ca2+ release results in reduction of PTP at SC synapses by disynaptic MF stimulation. Furthermore, inhibition of mitochondrial Ca2+ release selectively decreases frequency facilitation evoked by short trains of presynaptic stimulation at MF synapses, while having no effect at SC synapses. Moreover, depletion of ER Ca2+ stores leads to reduction of PTP at MF synapses, but PTP is unaffected by ER Ca2+ depletion at SC synapses. These findings show that MF and SC synapses differ in presynaptic mitochondrial content as well as mitochondrial Ca2+ dependent synaptic plasticity, highlighting differential regulatory mechanisms of presynaptic plasticity at MF and SC synapses.
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Affiliation(s)
- Sang Hun Lee
- Department of Neurology, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - David Lutz
- Institute for Structural Neurobiology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Dagmar Drexler
- Institute for Structural Neurobiology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Michael Frotscher
- Institute for Structural Neurobiology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jie Shen
- Department of Neurology, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Program in Neuroscience, Harvard Medical School, Boston, Massachusetts, United States of America
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Li F, Janussen D, Tasdemir D. New Discorhabdin B Dimers with Anticancer Activity from the Antarctic Deep-Sea Sponge Latrunculia biformis. Mar Drugs 2020; 18:md18020107. [PMID: 32054048 PMCID: PMC7074271 DOI: 10.3390/md18020107] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/05/2020] [Accepted: 02/07/2020] [Indexed: 12/25/2022] Open
Abstract
Latrunculia sponges represent a rich source of discorhabdin-type pyrroloiminoquinone alkaloids, a few of which comprise a dimeric structure. The anticancer-activity-guided isolation of the n-hexane subextract of the Antarctic deep-sea sponge Latrunculia biformis yielded the known compound (-)-(1R,2R,6R,8S,6'S)-discorhabdin B dimer (1) and two new derivatives, (-)-(1S,2R,6R,8S,6'S)-discorhabdin B dimer (2) and (-)-(1R,2R,6R,8S,6'S)-16',17'-dehydrodiscorhabdin B dimer (3). The chemical structures of compounds 1-3 were elucidated by means of HR-ESIMS, NMR, [], ECD spectroscopy, and a comparison with the previously reported discorhabdin analogs. Compounds 1 and 2 showed significant in vitro anticancer activity against the human colon cancer cell line (HCT-116), with IC50 values of 0.16 and 2.01 µM, respectively. Compared to monomeric discorhabdins, dimeric discorhabdins are very rare in Nature. This study adds two new discorhabdin dimers (2 and 3) to this small pyrroloiminoquinone subfamily. This is also the first report of compound 1 as a natural product and the first assessment of its in vitro anticancer activity.
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Affiliation(s)
- Fengjie Li
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany;
| | - Dorte Janussen
- Senckenberg Research Institute and Natural History Museum, Senckenberganlage 25, D-60325 Frankfurt, Germany;
| | - Deniz Tasdemir
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany;
- Faculty of Mathematics and Natural Sciences, Kiel University, Christian-Albrechts-Platz 4, 24118 Kiel, Germany
- Correspondence: ; Tel.: +49-431-600-4430
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Gawliński D, Smaga I, Zaniewska M, Gawlińska K, Faron-Górecka A, Filip M. Adaptive mechanisms following antidepressant drugs: Focus on serotonin 5-HT 2A receptors. Pharmacol Rep 2019; 71:994-1000. [PMID: 31546158 DOI: 10.1016/j.pharep.2019.05.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 01/29/2019] [Revised: 04/16/2019] [Accepted: 05/20/2019] [Indexed: 12/24/2022]
Abstract
BACKGROUND There is a strong support for the role of serotonin (5-HT) neurotransmission in depression and in the mechanism of action of antidepressants. Among 5-HT receptors, 5-HT2A receptor subtype seems to be an important target implicated in the above disorder. METHODS The aim of the study was to investigate the effects of antidepressants, such as imipramine (15 mg/kg), escitalopram (10 mg/kg) and tianeptine (10 mg/kg) as well as drugs with antidepressant activity, including N-acetylcysteine (100 mg/kg) and URB597 (a fatty acid amide hydrolase inhibitor, 0.3 mg/kg) on the 5-HT2A receptor labeling pattern in selected rat brain regions. Following acute or chronic (14 days) drug administration, rat brains were analyzed by using autoradiography with the 5-HT2A receptor antagonist [3H]ketanserin. RESULTS Single dose or chronic administration of imipramine decreased the radioligand binding in the claustrum and cortical subregions. The [3H]ketanserin binding either increased or decreased in cortical areas after acute N-acetylcysteine and URB597 administration, respectively. A similar shift towards reduction of the [3H]ketanserin binding was detected in the nucleus accumbens shell following either acute treatment with imipramine, escitalopram, N-acetylcysteine and URB597 or repeated administration of imipramine, tianeptine and URB597. CONCLUSIONS In conclusion, the present result indicate different sensitivity of brain 5-HT2A receptors to antidepressant drugs depending on schedule of drug administration and rat brain regions. The decrease of accumbal shell 5-HT2A receptor labeling by antidepressant drugs exhibiting different primary mechanism of action seems to be a common targeting mechanism associated with the outcome of depression treatment.
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Affiliation(s)
- Dawid Gawliński
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Drug Addiction Pharmacology, Kraków, Poland.
| | - Irena Smaga
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Drug Addiction Pharmacology, Kraków, Poland
| | - Magdalena Zaniewska
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Drug Addiction Pharmacology, Kraków, Poland
| | - Kinga Gawlińska
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Drug Addiction Pharmacology, Kraków, Poland
| | - Agata Faron-Górecka
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Pharmacology, Laboratory of Biochemical Pharmacology, Kraków, Poland
| | - Małgorzata Filip
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Drug Addiction Pharmacology, Kraków, Poland
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Park SJ, Kim Y, Yang SM, Henderson MJ, Yang W, Lindahl M, Urano F, Chen YM. Discovery of endoplasmic reticulum calcium stabilizers to rescue ER-stressed podocytes in nephrotic syndrome. Proc Natl Acad Sci U S A 2019; 116:14154-14163. [PMID: 31235574 PMCID: PMC6628787 DOI: 10.1073/pnas.1813580116] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [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] [Indexed: 01/01/2023] Open
Abstract
Emerging evidence has established primary nephrotic syndrome (NS), including focal segmental glomerulosclerosis (FSGS), as a primary podocytopathy. Despite the underlying importance of podocyte endoplasmic reticulum (ER) stress in the pathogenesis of NS, no treatment currently targets the podocyte ER. In our monogenic podocyte ER stress-induced NS/FSGS mouse model, the podocyte type 2 ryanodine receptor (RyR2)/calcium release channel on the ER was phosphorylated, resulting in ER calcium leak and cytosolic calcium elevation. The altered intracellular calcium homeostasis led to activation of calcium-dependent cytosolic protease calpain 2 and cleavage of its important downstream substrates, including the apoptotic molecule procaspase 12 and podocyte cytoskeletal protein talin 1. Importantly, a chemical compound, K201, can block RyR2-Ser2808 phosphorylation-mediated ER calcium depletion and podocyte injury in ER-stressed podocytes, as well as inhibit albuminuria in our NS model. In addition, we discovered that mesencephalic astrocyte-derived neurotrophic factor (MANF) can revert defective RyR2-induced ER calcium leak, a bioactivity for this ER stress-responsive protein. Thus, podocyte RyR2 remodeling contributes to ER stress-induced podocyte injury. K201 and MANF could be promising therapies for the treatment of podocyte ER stress-induced NS/FSGS.
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Affiliation(s)
- Sun-Ji Park
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Yeawon Kim
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Shyh-Ming Yang
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, MD 20850
| | - Mark J Henderson
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, MD 20850
| | - Wei Yang
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110
| | - Maria Lindahl
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland 00014
| | - Fumihiko Urano
- Division of Endocrinology, Metabolism, and Lipid Research, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Ying Maggie Chen
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110;
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Abstract
INTRODUCTION Chronic idiopathic constipation (CC) is highly prevalent worldwide. A subset of patients with CC have reduced fecal (and by inference, intra-colonic) bile acids (BA). Elobixibat, a locally-acting ileal bile acid transporter (IBAT) inhibitor, leads to increased BA delivery to the colon and represents a new class of treatment for CC. BAs accelerate colonic transit and increase colonic secretion. Therefore, IBAT inhibitors have potential to treat patients with CC. Areas covered: Rationale for IBAT inhibitor in therapeutics, and preclinical and clinical pharmacology of elobixibat: In vitro, elobixibat is a highly potent, selective IBAT inhibitor. In humans, elobixibat accelerated colonic transit. In phase 2A, 2B and 3 studies in CC, elobixibat was efficacious, well tolerated and safe. An open-label, phase 3 trial (52 weeks) confirmed the safety of elobixibat. Elobixibat reduces LDL cholesterol, increases serum GLP-1, and has potential in metabolic syndrome. Expert commentary: Uniquely among current treatments of CC, elobixibat stimulates both motor and secretory functions in the colon. These dual effects suggest that, when approved, elobixibat may be a first-line choice for constipation associated with colonic BA deficiency and a second-line treatment for all patients with CC and constipation-predominant irritable bowel syndrome. Further studies are required to confirm efficacy for relief of CC. Once approved, elobixibat will likely become a second-line choice for treatment of CC.
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Affiliation(s)
- Victor Chedid
- a Division of Gastroenterology and Hepatology , Mayo Clinic , Rochester , MN , USA
| | - Priya Vijayvargiya
- a Division of Gastroenterology and Hepatology , Mayo Clinic , Rochester , MN , USA
| | - Michael Camilleri
- a Division of Gastroenterology and Hepatology , Mayo Clinic , Rochester , MN , USA
- b Pharmacology, and Physiology , Mayo Clinic College of Medicine and Science, ConsultantDivision of Gastroenterology and Hepatology, Mayo Clinic , Rochester , MN , USA
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Drumm BT, Sung TS, Zheng H, Baker SA, Koh SD, Sanders KM. The effects of mitochondrial inhibitors on Ca 2+ signalling and electrical conductances required for pacemaking in interstitial cells of Cajal in the mouse small intestine. Cell Calcium 2018; 72:1-17. [PMID: 29748128 DOI: 10.1016/j.ceca.2018.01.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/26/2018] [Accepted: 01/27/2018] [Indexed: 01/16/2023]
Abstract
Interstitial cells of Cajal (ICC-MY) are pacemakers that generate and propagate electrical slow waves in gastrointestinal (GI) muscles. Slow waves appear to be generated by the release of Ca2+ from intracellular stores and activation of Ca2+-activated Cl- channels (Ano1). Conduction of slow waves to smooth muscle cells coordinates rhythmic contractions. Mitochondrial Ca2+ handling is currently thought to be critical for ICC pacemaking. Protonophores, inhibitors of the electron transport chain (FCCP, CCCP or antimycin) or mitochondrial Na+/Ca2+ exchange blockers inhibited slow waves in several GI muscles. Here we utilized Ca2+ imaging of ICC in small intestinal muscles in situ to determine the effects of mitochondrial drugs on Ca2+ transients in ICC. Muscles were obtained from mice expressing a genetically encoded Ca2+ indicator (GCaMP3) in ICC. FCCP, CCCP, antimycin, a uniporter blocker, Ru360, and a mitochondrial Na+/Ca2+ exchange inhibitor, CGP-37157 inhibited Ca2+ transients in ICC-MY. Effects were not due to depletion of ATP, as oligomycin did not affect Ca2+ transients. Patch-clamp experiments were performed to test the effects of the mitochondrial drugs on key pacemaker conductances, Ano1 and T-type Ca2+ (CaV3.2), in HEK293 cells. Antimycin blocked Ano1 and reduced CaV3.2 currents. CCCP blocked CaV3.2 current but did not affect Ano1 current. Ano1 and Cav3.2 currents were inhibited by CGP-37157. Inhibitory effects of mitochondrial drugs on slow waves and Ca2+ signalling in ICC can be explained by direct antagonism of key pacemaker conductances in ICC that generate and propagate slow waves. A direct obligatory role for mitochondria in pacemaker activity is therefore questionable.
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Affiliation(s)
- Bernard T Drumm
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Tae S Sung
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Haifeng Zheng
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Salah A Baker
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Sang D Koh
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Kenton M Sanders
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA.
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Pollano A, Trujillo V, Suárez MM. How does early maternal separation and chronic stress in adult rats affect the immunoreactivity of serotonergic neurons within the dorsal raphe nucleus? Stress 2018; 21:59-68. [PMID: 29157077 DOI: 10.1080/10253890.2017.1401062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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] [Indexed: 12/27/2022] Open
Abstract
Vulnerability to emotional disorders like depression derives from interactions between early and late environments, including stressful conditions. The serotonin (5HT) system is strongly affected by stress and chronic unpredictable stress can alter the 5HT system. We evaluated the distribution of active serotonergic neurons in the dorsal raphe nucleus (DR) through immunohistochemistry in maternally separated and chronically stressed rats treated with an antidepressant, tianeptine, whose mechanism of action is still under review. Male Wistar rats were subjected to daily maternal separation (MS) for 4.5 h between postnatal days (PND) 1-21, or to animal facility rearing (AFR). Between (PND) days 50-74, rats were exposed to chronic unpredictable stress and were treated daily with tianeptine (10 mg/kg) or vehicle. We found an interaction between the effects of MS and chronic unpredictable stress on Fos-5HT immunoreactive cells at mid-caudal level of the DR. MS-chronically stressed rats showed an increase of Fos-5HT immunoreactive cells compared with AFR-chronically stressed rats. The ventrolateral (DRL/VLPAG) and dorsal (DRD) subdivisions of the DR were significantly more active than the ventral part (DRV). At the rostral level of the DR, tianeptine decreased the number of Fos-5HT cells in DR in the AFR groups, both unstressed and stressed. Overall, our results support the idea of a match in phenotype exhibited when the early and the adult environment correspond.
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Affiliation(s)
- Antonella Pollano
- a Laboratorio de Fisiología Animal , Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba , Córdoba , Argentina
| | - Verónica Trujillo
- a Laboratorio de Fisiología Animal , Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba , Córdoba , Argentina
| | - Marta M Suárez
- a Laboratorio de Fisiología Animal , Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba , Córdoba , Argentina
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20
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Rondini EA, Mladenovic-Lucas L, Roush WR, Halvorsen GT, Green AE, Granneman JG. Novel Pharmacological Probes Reveal ABHD5 as a Locus of Lipolysis Control in White and Brown Adipocytes. J Pharmacol Exp Ther 2017; 363:367-376. [PMID: 28928121 PMCID: PMC5698943 DOI: 10.1124/jpet.117.243253] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 09/09/2017] [Indexed: 12/30/2022] Open
Abstract
Current knowledge regarding acute regulation of adipocyte lipolysis is largely based on receptor-mediated activation or inhibition of pathways that influence intracellular levels of cAMP, thereby affecting protein kinase A (PKA) activity. We recently identified synthetic ligands of α-β-hydrolase domain containing 5 (ABHD5) that directly activate adipose triglyceride lipase (ATGL) by dissociating ABHD5 from its inhibitory regulator, perilipin-1 (PLIN1). In the current study, we used these novel ligands to determine the direct contribution of ABHD5 to various aspects of lipolysis control in white (3T3-L1) and brown adipocytes. ABHD5 ligands stimulated adipocyte lipolysis without affecting PKA-dependent phosphorylation on consensus sites of PLIN1 or hormone-sensitive lipase (HSL). Cotreatment of adipocytes with synthetic ABHD5 ligands did not alter the potency or maximal lipolysis efficacy of the β-adrenergic receptor (ADRB) agonist isoproterenol (ISO), indicating that both target a common pool of ABHD5. Reducing ADRB/PKA signaling with insulin or desensitizing ADRB suppressed lipolysis responses to a subsequent challenge with ISO, but not to ABHD5 ligands. Lastly, despite strong treatment differences in PKA-dependent phosphorylation of HSL, we found that ligand-mediated activation of ABHD5 led to complete triglyceride hydrolysis, which predominantly involved ATGL, but also HSL. These results indicate that the overall pattern of lipolysis controlled by ABHD5 ligands is similar to that of isoproterenol, and that ABHD5 plays a central role in the regulation of adipocyte lipolysis. As lipolysis is critical for adaptive thermogenesis and in catabolic tissue remodeling, ABHD5 ligands may provide a means of activating these processes under conditions where receptor signaling is compromised.
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Affiliation(s)
- Elizabeth A Rondini
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan (E.A.R., L.M.-L., J.G.G.); Department of Chemistry, Scripps Research Institute, Jupiter, Florida (W.R.R., G.T.H.); and Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada (A.E.G.)
| | - Ljiljana Mladenovic-Lucas
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan (E.A.R., L.M.-L., J.G.G.); Department of Chemistry, Scripps Research Institute, Jupiter, Florida (W.R.R., G.T.H.); and Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada (A.E.G.)
| | - William R Roush
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan (E.A.R., L.M.-L., J.G.G.); Department of Chemistry, Scripps Research Institute, Jupiter, Florida (W.R.R., G.T.H.); and Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada (A.E.G.)
| | - Geoff T Halvorsen
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan (E.A.R., L.M.-L., J.G.G.); Department of Chemistry, Scripps Research Institute, Jupiter, Florida (W.R.R., G.T.H.); and Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada (A.E.G.)
| | - Alex E Green
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan (E.A.R., L.M.-L., J.G.G.); Department of Chemistry, Scripps Research Institute, Jupiter, Florida (W.R.R., G.T.H.); and Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada (A.E.G.)
| | - James G Granneman
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan (E.A.R., L.M.-L., J.G.G.); Department of Chemistry, Scripps Research Institute, Jupiter, Florida (W.R.R., G.T.H.); and Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada (A.E.G.)
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21
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Han SM, Kim YH, Jo HU, Kwak JA, Park HJ. Tianeptine Reduces Mechanical Allodynia in Spinal Nerve-ligated and Chemotherapy-induced Neuropathic Mice. Pain Physician 2017; 20:E593-E600. [PMID: 28535568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND Spinal nerve-ligated neuropathy and chemotherapy-induced neuropathy produce a persistent tactile allodynia in mice. Tianeptine is an antidepressant that exhibits structural similarities to tricyclic antidepressants but has distinct neurochemical properties. OBJECTIVE Here we examined the effects of intraperitoneal (i.p.) tianeptine on allodynia in spinal nerve-ligated and chemotherapy-induced neuropathic mice. STUDY DESIGN A randomized, experimental trial. SETTING Laboratory animal study. METHODS Spinal nerve-ligated neuropathy was induced in a Chung model made by ligating the L5 spinal nerve. Chemotherapy-induced neuropathy was induced by injecting vincristine (0.1 mg/kg/day; i.p.) on the following schedule: 5 days on, 2 days off, for14 days. Tianeptine (10, 30, and 50 mg/kg) and saline were administered, respectively, to both groups of neuropathic mice (n = 5 for each group). We evaluated mechanical allodynia using von Frey hairs prior to drug injections and at 30, 60, 90, 120, 180, and 240 minutes, and 24 hours after injections. We also measured the changes in activate transcription factor 3 (ATF3) level in the dorsal root ganglion (DRG) in each group in order to understand the analgesic mechanism of tianeptine. RESULTS Both spinal nerve-ligated and chemotherapy-induced neuropathic mice showed prominent allodynia. The control group showed no differences in mechanically induced allodynia compared to the experimental groups. For the tianeptine groups, paw-withdrawal thresholds in response to mechanical stimuli were significantly lower than the pre-administration values and values from the control group (P < 0.05). The increase in DRG ATF3 in neuropathic mice was reduced by tianeptine (P < 0.05). LIMITATIONS Less is known about the transcription factors that affect inflammation signaling. CONCLUSIONS Tianeptine administered i.p. reduces mechanical allodynia in spinal nerve-ligated and chemotherapy-induced neuropathic mice models. These effects were confirmed by attenuation of previously increased DRG ATF3.
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Affiliation(s)
- Seong Min Han
- Department of Anesthesiology and Pain Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Young Hoon Kim
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea
| | - Hyeon Uk Jo
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jung Ah Kwak
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hue Jung Park
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea
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22
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Grois L, Hupf J, Reinders J, Schröder J, Dietl A, Schmid PM, Jungbauer C, Resch M, Maier LS, Luchner A, Birner C. Combined Inhibition of the Renin-Angiotensin System and Neprilysin Positively Influences Complex Mitochondrial Adaptations in Progressive Experimental Heart Failure. PLoS One 2017; 12:e0169743. [PMID: 28076404 PMCID: PMC5226780 DOI: 10.1371/journal.pone.0169743] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 12/21/2016] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Inhibitors of the renin angiotensin system and neprilysin (RAS-/NEP-inhibitors) proved to be extraordinarily beneficial in systolic heart failure. Furthermore, compelling evidence exists that impaired mitochondrial pathways are causatively involved in progressive left ventricular (LV) dysfunction. Consequently, we aimed to assess whether RAS-/NEP-inhibition can attenuate mitochondrial adaptations in experimental heart failure (HF). METHODS AND RESULTS By progressive right ventricular pacing, distinct HF stages were induced in 15 rabbits, and 6 animals served as controls (CTRL). Six animals with manifest HF (CHF) were treated with the RAS-/NEP-inhibitor omapatrilat. Echocardiographic studies and invasive blood pressure measurements were undertaken during HF progression. Mitochondria were isolated from LV tissue, respectively, and further worked up for proteomic analysis using the SWATH technique. Enzymatic activities of citrate synthase and the electron transfer chain (ETC) complexes I, II, and IV were assessed. Ultrastructural analyses were performed by transmission electron microscopy. During progression to overt HF, intricate expression changes were mainly detected for proteins belonging to the tricarboxylic acid cycle, glucose and fat metabolism, and the ETC complexes, even though ETC complex I, II, or IV enzymatic activities were not significantly influenced. Treatment with a RAS-/NEP-inhibitor then reversed some maladaptive metabolic adaptations, positively influenced the decline of citrate synthase activity, and altered the composition of each respiratory chain complex, even though this was again not accompanied by altered ETC complex enzymatic activities. Finally, ultrastructural evidence pointed to a reduction of autophagolytic and degenerative processes with omapatrilat-treatment. CONCLUSIONS This study describes complex adaptations of the mitochondrial proteome in experimental tachycardia-induced heart failure and shows that a combined RAS-/NEP-inhibition can beneficially influence mitochondrial key pathways.
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Affiliation(s)
- Laura Grois
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Julian Hupf
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Jörg Reinders
- Institute of Functional Genomics, University Regensburg, Regensburg, Germany
| | - Josef Schröder
- Electron Microscopy Core Facility, Institute for Pathology, University Hospital Regensburg, Regensburg, Germany
| | - Alexander Dietl
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Peter M. Schmid
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Carsten Jungbauer
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Markus Resch
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Lars S. Maier
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Andreas Luchner
- Department of Internal Medicine I, Clinic St. Marien, Amberg, Germany
| | - Christoph Birner
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
- * E-mail:
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23
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Sánchez García JJ, Toledano-Magaña Y, Flores-Alamo M, Martínez-Klimova E, Galindo-Murillo R, Hernández-Ayala LF, Ortiz-Frade L, García-Ramos JC, Klimova EI. Polycyclic ferrocenyl(dihydro)thiazepine derivatives: Diastereo-selective synthesis, characterization, electrochemical behavior, theoretical and biological investigation. J Inorg Biochem 2016; 166:141-149. [PMID: 27863300 DOI: 10.1016/j.jinorgbio.2016.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 05/03/2016] [Revised: 08/27/2016] [Accepted: 09/13/2016] [Indexed: 11/19/2022]
Abstract
The reaction of E-2-ferrocenylmethylidenetetralones and E,E-2,6-bis-(ferrocenylmethylidene)-cyclohexanone with 2-aminothiophenol proceed with high diastereoselectivity, forming the ~4.5:1 mixture of trans- and cis-isomers of polycyclic ferrocenylthiazepines, respectively. The reactions of E,E-2,5-bis-(ferrocenylmethylidene)cyclopentanone and E,E-3,5-bis-(ferrocenylmethylidene)-1-methyl-4-piperidone with 2-aminothiophenol take place stereo specifically to form the diastereomeric tricyclic thiazepines of cis- and trans-configuration, respectively. The structures of the obtained compounds were established by IR, 1H and 13C NMR spectroscopy and mass-spectrometry. The structures of the trans-tetralino[1,2a]-, trans-5,7-dimethyltetralino[1,2a]-2-ferrocenyl [1,5]benzo-2,3-dihydrothiazepines and cis-5-ferrocenyl-methylidenecyclopentano[1,2a]-2-ferrocenyl- [1,5]benzo-2,3-dihydrothiazepine were confirmed by X-ray diffraction analysis. An electrochemical study reveals that the diferrocenyl derivatives belong to a Class I compounds of the Robin-Day classification. This behavior is explained by the analysis of frontier orbitals as calculated by density functional theory, showing that only one ferrocenyl unit participates in the generation of HOMO and LUMO orbitals. Compounds 4a and 4c showed similar capacity to inhibit the proliferation of HM1: IMSS trophozoite cultures than the first choice drug for human amoebiasis treatment, metronidazole. Morphological changes induced in the trophozoites after drug exposure suggest a redox in balance as the probable mechanism of the parasite death.
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Affiliation(s)
| | | | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, CD.MX, 04510, Mexico
| | | | | | | | - Luis Ortiz-Frade
- Departamento de Electroquímica, Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C., Querétaro, 76703, Mexico
| | - Juan C García-Ramos
- Departamento de Fisicoquímica, Instituto de Química, Universidad Nacional Autónoma de México, CD. MX, 04510, Mexico.
| | - Elena I Klimova
- Facultad de Química, Universidad Nacional Autónoma de México, CD.MX, 04510, Mexico.
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24
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Sasaki K, Makiyama T, Yoshida Y, Wuriyanghai Y, Kamakura T, Nishiuchi S, Hayano M, Harita T, Yamamoto Y, Kohjitani H, Hirose S, Chen J, Kawamura M, Ohno S, Itoh H, Takeuchi A, Matsuoka S, Miura M, Sumitomo N, Horie M, Yamanaka S, Kimura T. Patient-Specific Human Induced Pluripotent Stem Cell Model Assessed with Electrical Pacing Validates S107 as a Potential Therapeutic Agent for Catecholaminergic Polymorphic Ventricular Tachycardia. PLoS One 2016; 11:e0164795. [PMID: 27764147 PMCID: PMC5072719 DOI: 10.1371/journal.pone.0164795] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 09/30/2016] [Indexed: 12/21/2022] Open
Abstract
Introduction Human induced pluripotent stem cells (hiPSCs) offer a unique opportunity for disease modeling. However, it is not invariably successful to recapitulate the disease phenotype because of the immaturity of hiPSC-derived cardiomyocytes (hiPSC-CMs). The purpose of this study was to establish and analyze iPSC-based model of catecholaminergic polymorphic ventricular tachycardia (CPVT), which is characterized by adrenergically mediated lethal arrhythmias, more precisely using electrical pacing that could promote the development of new pharmacotherapies. Method and Results We generated hiPSCs from a 37-year-old CPVT patient and differentiated them into cardiomyocytes. Under spontaneous beating conditions, no significant difference was found in the timing irregularity of spontaneous Ca2+ transients between control- and CPVT-hiPSC-CMs. Using Ca2+ imaging at 1 Hz electrical field stimulation, isoproterenol induced an abnormal diastolic Ca2+ increase more frequently in CPVT- than in control-hiPSC-CMs (control 12% vs. CPVT 43%, p<0.05). Action potential recordings of spontaneous beating hiPSC-CMs revealed no significant difference in the frequency of delayed afterdepolarizations (DADs) between control and CPVT cells. After isoproterenol application with pacing at 1 Hz, 87.5% of CPVT-hiPSC-CMs developed DADs, compared to 30% of control-hiPSC-CMs (p<0.05). Pre-incubation with 10 μM S107, which stabilizes the closed state of the ryanodine receptor 2, significantly decreased the percentage of CPVT-hiPSC-CMs presenting DADs to 25% (p<0.05). Conclusions We recapitulated the electrophysiological features of CPVT-derived hiPSC-CMs using electrical pacing. The development of DADs in the presence of isoproterenol was significantly suppressed by S107. Our model provides a promising platform to study disease mechanisms and screen drugs.
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MESH Headings
- Action Potentials/drug effects
- Adult
- Animals
- Anti-Asthmatic Agents/chemistry
- Anti-Asthmatic Agents/pharmacology
- Anti-Asthmatic Agents/therapeutic use
- Calcium/metabolism
- Calreticulin/genetics
- Calreticulin/metabolism
- Calsequestrin/genetics
- Calsequestrin/metabolism
- Cell Differentiation/drug effects
- Cells, Cultured
- Electric Stimulation
- Fibroblasts/cytology
- Fibroblasts/metabolism
- Humans
- Induced Pluripotent Stem Cells/cytology
- Induced Pluripotent Stem Cells/metabolism
- Isoproterenol/pharmacology
- Mice
- Mice, Inbred NOD
- Mice, SCID
- Models, Biological
- Myocytes, Cardiac/cytology
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/transplantation
- Ryanodine/pharmacology
- Ryanodine Receptor Calcium Release Channel/chemistry
- Ryanodine Receptor Calcium Release Channel/genetics
- Ryanodine Receptor Calcium Release Channel/metabolism
- Sarcoplasmic Reticulum Calcium-Transporting ATPases/genetics
- Sarcoplasmic Reticulum Calcium-Transporting ATPases/metabolism
- Tachycardia, Ventricular/drug therapy
- Tachycardia, Ventricular/pathology
- Tachycardia, Ventricular/therapy
- Thiazepines/chemistry
- Thiazepines/pharmacology
- Thiazepines/therapeutic use
- Transplantation, Heterologous
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Affiliation(s)
- Kenichi Sasaki
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takeru Makiyama
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
- * E-mail: (TM); (Y. Yoshida)
| | - Yoshinori Yoshida
- Kyoto University iPS Cell Research and Application, Kyoto, Japan
- * E-mail: (TM); (Y. Yoshida)
| | - Yimin Wuriyanghai
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Tsukasa Kamakura
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Suguru Nishiuchi
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Mamoru Hayano
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takeshi Harita
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yuta Yamamoto
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hirohiko Kohjitani
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Sayako Hirose
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Jiarong Chen
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Mihoko Kawamura
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Seiko Ohno
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Hideki Itoh
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Ayako Takeuchi
- Department of Integrative and Systems Physiology, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Satoshi Matsuoka
- Department of Integrative and Systems Physiology, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Masaru Miura
- Division of Cardiology, Tokyo Metropolitan Children’s Medical Center, Tokyo, Japan
| | - Naokata Sumitomo
- Department of Pediatric Cardiology, Saitama Medical University International Medical Center, Saitama, Japan
| | - Minoru Horie
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Shinya Yamanaka
- Kyoto University iPS Cell Research and Application, Kyoto, Japan
| | - Takeshi Kimura
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Seo MK, McIntyre RS, Cho HY, Lee CH, Park SW, Mansur RB, Kim GM, Baek JH, Woo YS, Lee JG, Kim YH. Tianeptine induces mTORC1 activation in rat hippocampal neurons under toxic conditions. Psychopharmacology (Berl) 2016; 233:2617-27. [PMID: 27129862 DOI: 10.1007/s00213-016-4309-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 12/16/2015] [Accepted: 04/22/2016] [Indexed: 12/23/2022]
Abstract
RATIONALE Recent studies have demonstrated that mTORC1 activation may be related to antidepressant action. However, the relationship between mTORC1 signaling activation and currently prescribed antidepressants remains unclear. OBJECTIVE The aim of the present study was to determine whether alterations in mTORC1 signaling are observable following treatment with tianeptine under toxic conditions induced by B27 deprivation. Additionally, we investigated whether this drug affects synaptic proteins, neurite outgrowth, and spine density via mTORC1 signaling. METHODS Using Western blotting, we measured the phosphorylation levels of mTORC1, 4E-BP-1, p70S6K, Akt, and ERK in rat primary hippocampal neurons. Changes in BDNF, dendritic outgrowth, spine density, and synaptic proteins (PSD-95, synaptophysin, and GluR1) were measured. RESULTS Tianeptine significantly increased the phosphorylation of mTORC1, 4E-BP-1, p70S6K, Akt, and ERK. The increase in mTOR phosphorylation was blocked by the PI3K, MEK, and mTORC1 inhibitors. Tianeptine increased BDNF, dendritic outgrowth, spine density, and synaptic proteins; all of these effects were blocked by the mTORC1 inhibitor. CONCLUSIONS In this study, we demonstrated that tianeptine activates the mTORC1 signaling pathway and increases dendritic outgrowth, spine density, and synaptic proteins through mTORC1 signaling under toxic conditions in rat primary hippocampal neurons.
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Affiliation(s)
- Mi Kyoung Seo
- Paik Institute for Clinical Research, Inje University, Busan, Republic of Korea
| | - Roger S McIntyre
- Mood Disorders Psychopharmacology Unit, University Health Network, University of Toronto, Toronto, ON, Canada
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Hye Yeon Cho
- Paik Institute for Clinical Research, Inje University, Busan, Republic of Korea
| | - Chan Hong Lee
- Paik Institute for Clinical Research, Inje University, Busan, Republic of Korea
| | - Sung Woo Park
- Paik Institute for Clinical Research, Inje University, Busan, Republic of Korea
- Department of Health Science and Technology, Graduate School, Inje University, Busan, Republic of Korea
| | - Rodrigo B Mansur
- Mood Disorders Psychopharmacology Unit, University Health Network, University of Toronto, Toronto, ON, Canada
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Gyung-Mee Kim
- Department of Psychiatry, School of Medicine, Haeundae Paik Hospital, Inje University, Busan, Republic of Korea
| | - Jun Hyung Baek
- Department of Psychiatry, School of Medicine, Haeundae Paik Hospital, Inje University, Busan, Republic of Korea
| | - Young Sup Woo
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jung Goo Lee
- Paik Institute for Clinical Research, Inje University, Busan, Republic of Korea.
- Mood Disorders Psychopharmacology Unit, University Health Network, University of Toronto, Toronto, ON, Canada.
- Department of Health Science and Technology, Graduate School, Inje University, Busan, Republic of Korea.
- Department of Psychiatry, School of Medicine, Haeundae Paik Hospital, Inje University, Busan, Republic of Korea.
- Department of Psychiatry, Inje University Haeundae Paik Hospital, 1435, Jwa-dong, Haeundae-gu, Busan, 612-030, Republic of Korea.
| | - Young Hoon Kim
- Paik Institute for Clinical Research, Inje University, Busan, Republic of Korea.
- Department of Health Science and Technology, Graduate School, Inje University, Busan, Republic of Korea.
- Department of Psychiatry, School of Medicine, Haeundae Paik Hospital, Inje University, Busan, Republic of Korea.
- Department of Psychiatry, Inje University Haeundae Paik Hospital, 1435, Jwa-dong, Haeundae-gu, Busan, 612-030, Republic of Korea.
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26
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Nunez DJ, Yao X, Lin J, Walker A, Zuo P, Webster L, Krug-Gourley S, Zamek-Gliszczynski MJ, Gillmor DS, Johnson SL. Glucose and lipid effects of the ileal apical sodium-dependent bile acid transporter inhibitor GSK2330672: double-blind randomized trials with type 2 diabetes subjects taking metformin. Diabetes Obes Metab 2016; 18:654-62. [PMID: 26939572 DOI: 10.1111/dom.12656] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [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: 12/13/2015] [Revised: 01/10/2016] [Accepted: 02/27/2016] [Indexed: 12/15/2022]
Abstract
AIMS To investigate the pharmacodynamics, pharmacokinetics and safety/tolerability of blocking reuptake of bile acids using the inhibitor GSK2330672 (GSK672) in patients with type 2 diabetes (T2D). METHODS Subjects with T2D taking metformin were enrolled in two studies in which they took metformin 850 mg twice daily for 2 weeks prior to and during the randomized treatment periods. In the first crossover study (n = 15), subjects received GSK672 45 mg, escalating to 90 mg, twice daily, or placebo for 7 days. The second parallel-group study (n = 75) investigated GSK672 10-90 mg twice daily, placebo or sitagliptin for 14 days. RESULTS In both studies, GSK672 reduced circulating bile acids and increased serum 7-α-hydroxy-4-cholesten-3-one (C4), an intermediate in the hepatic synthesis of bile acids. Compared with placebo, in the parallel-group study 90 mg GSK672 twice daily reduced fasting plasma glucose [FPG; -1.21 mmol/l; 95% confidence interval (CI) -2.14, -0.28] and weighted-mean glucose area under the curve (AUC)0-24 h (-1.33 mmol/l; 95% CI -2.30, -0.36), as well as fasting and weighted-mean insulin AUC0 -24 h . GSK672 also reduced cholesterol (LDL, non-HDL and total cholesterol) and apolipoprotein B concentrations; the maximum LDL cholesterol reduction was ∼40%. There was no change in HDL cholesterol but there was a trend towards increased fasting triglyceride levels in the GSK672 groups compared with placebo. In both studies, the most common adverse events associated with GSK672 were gastrointestinal, mostly diarrhoea (22-100%), which appeared to be independent of dose. CONCLUSIONS In subjects with T2D on metformin, GSK672 improved glucose and lipids, but there was a high incidence of gastrointestinal adverse events.
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Affiliation(s)
- D J Nunez
- GlaxoSmithKline plc, Research Triangle Park, NC and Collegeville, PA, USA
| | - X Yao
- Alexion Pharmaceuticals, Inc., Cambridge, MA, USA
| | - J Lin
- Grifols Therapeutics Inc., Research Triangle Park, NC, USA
| | - A Walker
- GlaxoSmithKline plc, Research Triangle Park, NC and Collegeville, PA, USA
| | - P Zuo
- Parexel International, Durham, NC, USA
| | | | - S Krug-Gourley
- GlaxoSmithKline plc, Research Triangle Park, NC and Collegeville, PA, USA
| | | | - D S Gillmor
- Pharmaceutical Product Development LLC, Morrisville, NC, USA
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Türker-Kaya S, Mutlu O, Çelikyurt İK, Akar F, Ulak G. Tianeptine, olanzapine and fluoxetine show similar restoring effects on stress induced molecular changes in mice brain: An FT-IR study. Spectrochim Acta A Mol Biomol Spectrosc 2016; 161:178-185. [PMID: 26952787 DOI: 10.1016/j.saa.2016.02.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 01/29/2016] [Accepted: 02/28/2016] [Indexed: 06/05/2023]
Abstract
Chronic stress which can cause a variety of disorders and illness ranging from metabolic and cardiovascular to mental leads to alterations in content, structure and dynamics of biomolecules in brain. The determination of stress-induced changes along with the effects of antidepressant treatment on these parameters might bring about more effective therapeutic strategies. In the present study, we investigated unpredictable chronic mild stress (UCMS)-induced changes in biomolecules in mouse brain and the restoring effects of tianeptine (TIA), olanzapine (OLZ) and fluoxetine (FLX) on these variations, by Fourier transform infrared (FT-IR) spectroscopy. The results revealed that chronic stress causes different membrane packing and an increase in lipid peroxidation, membrane fluidity. A significant increment for lipid/protein, C=O/lipid, CH3/lipid, CH2/lipid, PO(-)2/lipid, COO(-)/lipid and RNA/protein ratios but a significant decrease for lipid/protein ratios were also obtained. Additionally, altered protein secondary structure components were estimated, such as increment in random coils and beta structures. The administration of TIA, OLZ and FLX drugs restored these stress-induced variations except for alterations in protein structure and RNA/protein ratio. This may suggest that these drugs have similar restoring effects on the consequences of stress activity in brain, in spite of the differences in their action mechanisms. All findings might have importance in understanding molecular mechanisms underlying chronic stress and contribute to studies aimed for drug development.
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Affiliation(s)
- Sevgi Türker-Kaya
- Department of Biology, Faculty of Arts and Sciences, 41380, Kocaeli, Turkey.
| | - Oğuz Mutlu
- Department of Pharmacology, Faculty of Medicine, 41380, Kocaeli, Turkey
| | - İpek K Çelikyurt
- Department of Pharmacology, Faculty of Medicine, 41380, Kocaeli, Turkey
| | - Furuzan Akar
- Department of Pharmacology, Faculty of Medicine, 41380, Kocaeli, Turkey
| | - Güner Ulak
- Department of Pharmacology, Faculty of Medicine, 41380, Kocaeli, Turkey
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Trujillo V, Durando PE, Suárez MM. Maternal separation in early life modifies anxious behavior and Fos and glucocorticoid receptor expression in limbic neurons after chronic stress in rats: effects of tianeptine. Stress 2016; 19:91-103. [PMID: 26452320 DOI: 10.3109/10253890.2015.1105958] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [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] [Indexed: 11/13/2022] Open
Abstract
Early-life adversity can lead to long-term consequence persisting into adulthood. Here, we assess the implications of an adverse early environment on vulnerability to stress during adulthood. We hypothesized that the interplay between early and late stress would result in a differential phenotype regarding the number of neurons immunoreactive for glucocorticoid receptor (GR-ir) and neuronal activity as assessed by Fos immunoreactivity (Fos-ir) in brain areas related to stress responses and anxiety-like behavior. We also expected that the antidepressant tianeptine could correct some of the alterations induced in our model. Male Wistar rats were subjected to daily maternal separation (MS) for 4.5 h during the first 3 weeks of life. As adults, the rats were exposed to chronic stress for 24 d and they were treated daily with tianeptine (10 mg/kg intraperitoneal) or vehicle (isotonic saline). Fos-ir was increased by MS in all structures analyzed. Chronic stress reduced Fos-ir in the hippocampus, but increased it in the paraventricular nucleus. Furthermore, chronic stress increased GR-ir in hippocampus (CA1) and amygdala in control non-MS rats. By contrast, when MS and chronic stress were combined, GR-ir was decreased in these structures. Additionally, whereas tianeptine did not affect Fos-ir, it regulated GR-ir in a region-dependent manner, in hippocampus and amygdala opposing in some cases the stress or MS effects. Furthermore, tianeptine reversed the MS- or stress-induced anxious behavior. The interplay between MS and chronic stress observed indicates that MS rats have a modified phenotype, which is expressed when they are challenged by stress in later life.
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Affiliation(s)
- Verónica Trujillo
- a Laboratorio De Fisiología Animal , Facultad De Ciencias Exactas, Físicas Y Naturales, Universidad Nacional De Córdoba , Córdoba , Argentina
| | - Patricia E Durando
- a Laboratorio De Fisiología Animal , Facultad De Ciencias Exactas, Físicas Y Naturales, Universidad Nacional De Córdoba , Córdoba , Argentina
| | - Marta M Suárez
- a Laboratorio De Fisiología Animal , Facultad De Ciencias Exactas, Físicas Y Naturales, Universidad Nacional De Córdoba , Córdoba , Argentina
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Jayasooriya RGPT, Dilshara MG, Choi YH, Moon SK, Kim WJ, Kim GY. Tianeptine sodium salt suppresses TNF-α-induced expression of matrix metalloproteinase-9 in human carcinoma cells via suppression of the PI3K/Akt-mediated NF-κB pathway. Environ Toxicol Pharmacol 2014; 38:502-9. [PMID: 25168152 DOI: 10.1016/j.etap.2014.07.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 07/18/2014] [Accepted: 07/31/2014] [Indexed: 05/12/2023]
Abstract
Tianeptine sodium salt (TSS) is a selective facilitator of serotonin, but there are no reports regarding anti-invasive effects of TSS. Therefore, we investigated the effect of TSS on the expression of matrix metalloproteinase-9 (MMP-9) and invasion in three different human carcinoma cell lines. Our findings showed that MMP-9 activity was significantly increased in response to tumor necrosis factor-α (TNF-α), and that TSS reduced TNF-α-induced MMP-9 activity in a dose-dependent manner. TSS also downregulated both MMP-9 expression and TNF-α-induced MMP-9 promoter activity. Using a matrigel invasion assay, we showed that TSS significantly attenuated invasive rates in TNF-α-stimulated LNCaP prostate carcinoma cells. Furthermore, TSS suppressed TNF-α-induced NF-κB activity, which is a potential transcriptional factor for regulating many invasive genes, including MMP-9, by suppressing IκB degradation and nuclear translocation of NF-κB subunits in LNCaP prostate carcinoma cells. TSS also downregulated TNF-α-induced phosphorylation of phosphatidyl-inositol 3 kinase (PI3K) and Akt, and a selective PI3K/Akt inhibitor, LY294002, diminished TNF-α-induced NF-κB activation followed by levels of MMP-9, suggesting that TSS also reduces MMP-9 expression by inhibiting the PI3K/Akt-mediated NF-κB pathway. These results indicate that TSS is a potential anti-invasive agent by suppression of TNF-α-induced MMP-9 expression via inhibition of PI3K/Akt-mediated NF-κB activity.
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Affiliation(s)
| | - Matharage Gayani Dilshara
- Laboratory of Immunobiology, Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Republic of Korea
| | - Yung Hyun Choi
- Department of Biochemistry, College of Oriental Medicine, Dongeui University, Busan 614-051, Republic of Korea
| | - Sung-Kwon Moon
- School of Food Science and Technology, Chung-Ang University, Ansung 456-756, Republic of Korea
| | - Wun-Jae Kim
- Department of Urology, College of Medicine, Chungbuk National University, Chungbuk, Cheongju 361-763, Republic of Korea
| | - Gi-Young Kim
- Laboratory of Immunobiology, Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Republic of Korea.
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Smaga I, Bystrowska B, Gawliński D, Pomierny B, Stankowicz P, Filip M. Antidepressants and changes in concentration of endocannabinoids and N-acylethanolamines in rat brain structures. Neurotox Res 2014; 26:190-206. [PMID: 24652522 PMCID: PMC4067538 DOI: 10.1007/s12640-014-9465-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 02/26/2014] [Accepted: 03/06/2014] [Indexed: 12/26/2022]
Abstract
The endocannabinoid (eCB) system has recently been implicated in both the pathogenesis of depression and the action of antidepressants. Here, we investigated the effect of acutely or chronically administering antidepressants [imipramine (IMI) (15 mg/kg), escitalopram (ESC) (10 mg/kg), and tianeptine (10 mg/kg)] on the levels of both eCBs [anandamide (AEA) and 2-arachidonoylglycerol (2-AG)] and N-acylethanolamines (NAEs) [palmitoylethanolamide (PEA) and oleoylethanolamide (OEA)] in various rat brain regions. We also examined the ability of the acute and chronic administration of N-acetylcysteine (NAC) (a mucolytic drug; 100 mg/kg) or URB597 (a fatty acid amide hydrolase inhibitor; 0.3 mg/kg), which have both elicited antidepressant activity in preclinical studies, to affect eCB and NAE levels. Next, we determined whether the observed effects are stable 10 days after the chronic administration of these drugs was halted. We report that the chronic administration of all investigated drugs increased AEA levels in the hippocampus and also increased both AEA and 2-AG levels in the dorsal striatum. NAE levels in limbic regions also increased after treatment with IMI (PEA/OEA), ESC (PEA), and NAC (PEA/OEA). Removing chronic ESC treatment for 10 days affected eCB and NAE levels in the frontal cortex, hippocampus, dorsal striatum, and cerebellum, while a similar tianeptine-free period enhanced accumbal NAE levels. All other drugs maintained their effects after the 10-day washout period. Therefore, the eCB system appears to play a significant role in the mechanism of action of clinically effective and potential antidepressants and may serve as a target for drug design and discovery.
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Affiliation(s)
- Irena Smaga
- Department of Toxicology, Faculty of Pharmacy, College of Medicum, Jagiellonian University, 9, Medyczna Street, 30-688, Kraków, Poland,
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Kozlovskiĭ VL, Kenunen OG. [Studying the development of imipramine tolerance and prospects of its overcoming with the aid of tianeptine]. Eksp Klin Farmakol 2014; 77:10-14. [PMID: 25033565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Reaction of two groups of mice to sub-chronic imipramine administration has been studied in a series of experiments, where one (control) group received physiological saline instead of imipramine. Then, both groups were randomly divided to receive either tianeptine (two groups) or physiological saline (two groups) for three days. After this period, the reaction of mice to imipramine was assessed again by measuring the immobilization duration in the tail suspension test. It was found that sub-chronic administration of imipramine (6 days) did not reduce sensitivity of the mice to this medication. Tianeptine showed "pro-depressive" action in the tail suspension test, but the administration of tianeptine increased the sensitivity of rodents to imipramine.
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Makani V, Hall J, Qamar K, Jain P, Jang Y, Hensley K, Park JJ. Tianeptine interferes with microtubule organization and hormone secretion of pheochromocytoma cells. Mol Cell Endocrinol 2013; 381:175-87. [PMID: 23933152 PMCID: PMC3796025 DOI: 10.1016/j.mce.2013.07.033] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 07/23/2013] [Accepted: 07/31/2013] [Indexed: 10/26/2022]
Abstract
Pheochromocytoma originates from chromaffin cells in the adrenal medulla and sympathetic paraganglia. 36-53% of pheochromocytoma becomes malignant and, thereafter, resistant to conventional treatments. Pheochromocytoma also causes hyper-secretion of catecholamines that cause severe hypertension. We found that an antidepressant, tianeptine, interfered with normal life cycle of pheochromocytoma cells at its clinical doses. Treatment with tianeptine caused microtubule bundling and specific degradation of cytoplasmic dynein, a retrograde microtubule motor that mediates various microtubule-dependent processes during interphase and mitosis, in the rat pheochromocytoma PC12 cells. Tianeptine also increased the levels of pro-apoptotic proteins, slowed cell cycle progression, and increased apoptosis in PC12 cells. Importantly, tianeptine treatment decreased high K(+)-stimulated secretion of norepinephrine and chromogranin A in PC12 cells and of epinephrine in the mouse pheochromocytoma MPC cells. Our study demonstrates, for the first time, that tianeptine interferes with normal life cycle of pheochromocytoma cells.
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Affiliation(s)
- Vishruti Makani
- Department of Neurosciences, University of Toledo, College of Medicine and Life Science, Toledo, Ohio 43614
| | - James Hall
- Department of Neurosciences, University of Toledo, College of Medicine and Life Science, Toledo, Ohio 43614
| | - Khola Qamar
- Department of Neurosciences, University of Toledo, College of Medicine and Life Science, Toledo, Ohio 43614
| | - Priyanka Jain
- Department of Neurosciences, University of Toledo, College of Medicine and Life Science, Toledo, Ohio 43614
| | - Yonggil Jang
- Department of Neurosciences, University of Toledo, College of Medicine and Life Science, Toledo, Ohio 43614
| | - Kenneth Hensley
- Department of Pathology, University of Toledo, College of Medicine and Life Science, Toledo, Ohio 43614
| | - Joshua J. Park
- Department of Neurosciences, University of Toledo, College of Medicine and Life Science, Toledo, Ohio 43614
- To whom correspondence should be addressed., Department of Neurosciences, University of Toledo College of Medicine, Toledo, Ohio 43614, , Phone: (419) 383-4085, Fax: (419) 383-3008
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Breckner A, Ganz M, Marcellin D, Richter J, Gerwin N, Rausch M. Effect of Calstabin1 depletion on calcium transients and energy utilization in muscle fibers and treatment opportunities with RyR1 stabilizers. PLoS One 2013; 8:e81277. [PMID: 24303040 PMCID: PMC3841141 DOI: 10.1371/journal.pone.0081277] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 10/21/2013] [Indexed: 11/29/2022] Open
Abstract
Depletion of calstabin1 (FKBP12) from the RyR1 channel and consequential calcium leakage from the sarcoplasmic reticulum (SR) is found in certain disease conditions such as dystrophy, aging or muscle overuse. Here, we first assessed the effect of calstabin1 depletion on resting Ca2+ levels and transients. We found that depletion of calstabin1 with the calstabin1-dissociation compound FK506 increased the release of calcium from the SR by 14 % during tetanic stimulation (50 Hz, 300 ms) and delayed cytosolic calcium removal. However, we did not find a significant increase in resting cytosolic Ca2+ levels. Therefore, we tested if increased SERCA activity could counterbalance calcium leakage. By measuring the energy utilization of muscle fibers with and without FK506 treatment, we observed that FK506-treatment increased oxygen consumption by 125% compared to baseline levels. Finally, we found that pretreatment of muscle fibers with the RyR1 stabilizer JTV-519 led to an almost complete normalization of calcium flux dynamics and energy utilization. We conclude that cytosolic calcium levels are mostly preserved in conditions with leaky RyR1 channels due to increased SERCA activity. Therefore, we suggest that RyR1 leakiness might lead to chronic metabolic stress, followed by cellular damage, and RyR1 stabilizers could potentially protect diseased muscle tissue.
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Affiliation(s)
- Anke Breckner
- Global Imaging Group, Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Magdalena Ganz
- Bioimaging Center, University of Konstanz, Konstanz, Germany
| | - David Marcellin
- Global Imaging Group, Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Jens Richter
- Global Imaging Group, Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Nicole Gerwin
- Musculoskeletal Disease Area, Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Martin Rausch
- Global Imaging Group, Novartis Institutes for BioMedical Research, Basel, Switzerland
- * E-mail:
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Jantas D, Krawczyk S, Lason W. The predominant protective effect of tianeptine over other antidepressants in models of neuronal apoptosis: the effect blocked by inhibitors of MAPK/ERK1/2 and PI3-K/Akt pathways. Neurotox Res 2013; 25:208-25. [PMID: 24105645 PMCID: PMC3889694 DOI: 10.1007/s12640-013-9430-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 08/24/2013] [Accepted: 09/25/2013] [Indexed: 11/25/2022]
Abstract
Tianeptine (Tian) possesses neuroprotective potential, however, little is known about the effect of this drug in models of neuronal apoptosis. In the present study, we aimed (1) to compare the neuroprotective capacities of some antidepressants (ADs) in the models of staurosporine (St)- and doxorubicin (Dox)-evoked cell death, activating the intracellular and the extracellular apoptotic pathway, respectively; (2) to identify the Tian-modulated steps underlying its neuroprotective action; (3) to test the effect of various ADs against Dox-evoked cell damage in glia cells. Primary neuronal and glia cell cultures and retinoic acid-differentiated human neuroblastoma SH-SY5Y (RA-SH-SY5Y) cells were co-treated with imipramine, fluoxetine, citalopram, reboxetine, mirtazapine or Tian and St or Dox. The data showed the predominant neuroprotective effect of Tian over other tested ADs against St- and Dox-induced cell damage in primary neurons and in RA-SH-SY5Y cells. This effect was shown to be caspase-3-independent but connected with attenuation of DNA fragmentation. Moreover, neuroprotection elicited by Tian was blocked by pharmacological inhibitors of MAPK/ERK1/2 and PI3-K/Akt signaling pathways as well by inhibitor of necroptosis, necrostatin-1. Interestingly, the protective effects of all tested ADs were demonstrated in primary glia cells against the Dox-evoked cell damage. The obtained data suggests the glial cells as a common target for protective action of various ADs whereas in relation to neuronal cells only Tian possesses such properties, at least against St- and Dox-induced cell damage. Moreover, this neuroprotective effect of Tian is caspase-3-independent and engages the regulation of survival pathways (MAPK/ERK1/2 and PI3-K/Akt).
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Affiliation(s)
- D Jantas
- Department of Experimental Neuroendocrinology, Institute of Pharmacology, Polish Academy of Sciences, Smetna 12, 31-343, Kraków, PL, Poland,
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Zoladz PR, Fleshner M, Diamond DM. Differential effectiveness of tianeptine, clonidine and amitriptyline in blocking traumatic memory expression, anxiety and hypertension in an animal model of PTSD. Prog Neuropsychopharmacol Biol Psychiatry 2013; 44:1-16. [PMID: 23318688 DOI: 10.1016/j.pnpbp.2013.01.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 12/22/2012] [Accepted: 01/04/2013] [Indexed: 12/21/2022]
Abstract
Individuals exposed to life-threatening trauma are at risk for developing post-traumatic stress disorder (PTSD), a debilitating condition that involves persistent anxiety, intrusive memories and several physiological disturbances. Current pharmacotherapies for PTSD manage only a subset of these symptoms and typically have adverse side effects which limit their overall effectiveness. We evaluated the effectiveness of three different pharmacological agents to ameliorate a broad range of PTSD-like symptoms in our established predator-based animal model of PTSD. Adult male Sprague-Dawley rats were given 1-h cat exposures on two occasions that were separated by 10 days, in conjunction with chronic social instability. Beginning 24 h after the first cat exposure, rats received daily injections of amitriptyline, clonidine, tianeptine or vehicle. Three weeks after the second cat exposure, all rats underwent a battery of behavioral and physiological tests. The vehicle-treated, psychosocially stressed rats demonstrated a robust fear memory for the two cat exposures, as well as increased anxiety expressed on the elevated plus maze, an exaggerated startle response, elevated heart rate and blood pressure, reduced growth rate and increased adrenal gland weight, relative to the vehicle-treated, non-stressed (control) rats. Neither amitriptyline nor clonidine was effective at blocking the entire cluster of stress-induced sequelae, and each agent produced adverse side effects in control subjects. Only the antidepressant tianeptine completely blocked the effects of psychosocial stress on all of the physiological and behavioral measures that were examined. These findings illustrate the differential effectiveness of these three treatments to block components of PTSD-like symptoms in rats, and in particular, reveal the profile of tianeptine as the most effective of all three agents.
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Affiliation(s)
- Phillip R Zoladz
- Department of Psychology, Sociology & Criminal Justice, Ohio Northern University, Ada, OH, USA
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Burghardt NS, Sigurdsson T, Gorman JM, McEwen BS, LeDoux JE. Chronic antidepressant treatment impairs the acquisition of fear extinction. Biol Psychiatry 2013; 73:1078-86. [PMID: 23260230 PMCID: PMC3610782 DOI: 10.1016/j.biopsych.2012.10.012] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [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] [Received: 02/13/2012] [Revised: 10/15/2012] [Accepted: 10/15/2012] [Indexed: 01/08/2023]
Abstract
BACKGROUND Like fear conditioning, the acquisition phase of extinction involves new learning that is mediated by the amygdala. During extinction training, the conditioned stimulus is repeatedly presented in the absence of the unconditioned stimulus, and the expression of previously learned fear gradually becomes suppressed. Our previous study revealed that chronic treatment with a selective serotonin reuptake inhibitor (SSRI) impairs the acquisition of auditory fear conditioning. To gain further insight into how SSRIs affect fear learning, we tested the effects of chronic SSRI treatment on the acquisition of extinction. METHODS Rats were treated chronically (22 days) or subchronically (9 days) with the SSRI citalopram (10 mg/kg/day) before extinction training. The results were compared with those after chronic and subchronic treatment with tianeptine (10 mg/kg/day), an antidepressant with a different method of action. The expression of the NR2B subunit of the N-methyl-D-aspartate receptor in the amygdala was examined after behavioral testing. RESULTS Chronic but not subchronic administration of citalopram impaired the acquisition of extinction and downregulated the NR2B subunit of the N-methyl-D-aspartate receptor in the lateral and basal nuclei of the amygdala. Similar behavioral and molecular changes were found with tianeptine treatment. CONCLUSIONS These results provide further evidence that chronic antidepressant treatment can impair amygdala-dependent learning. Our findings are consistent with a role for glutamatergic neurotransmission in the final common pathway of antidepressant treatment.
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Affiliation(s)
- Nesha S Burghardt
- Department of Neuroscience, Columbia University, New York, NY 10032-2695, USA.
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Lautenschläger J, Prell T, Ruhmer J, Weidemann L, Witte OW, Grosskreutz J. Overexpression of human mutated G93A SOD1 changes dynamics of the ER mitochondria calcium cycle specifically in mouse embryonic motor neurons. Exp Neurol 2013; 247:91-100. [PMID: 23578819 DOI: 10.1016/j.expneurol.2013.03.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [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: 01/05/2013] [Revised: 03/14/2013] [Accepted: 03/28/2013] [Indexed: 12/14/2022]
Abstract
Motor neurons vulnerable to the rapidly progressive deadly neurodegenerative disease amyotrophic lateral sclerosis (ALS) inherently express low amounts of calcium binding proteins (CaBP), likely to allow physiological motor neuron firing frequency modulation. At the same time motor neurons are susceptible to AMPA receptor mediated excitotoxicity and internal calcium deregulation which is not fully understood. We analysed ER mitochondria calcium cycle (ERMCC) dynamics with subsecond resolution in G93A hSOD1 overexpressing motor neurons as a model of ALS using fluorescent calcium imaging. When comparing vulnerable motor neurons and non-motor neurons from G93A hSOD1 mice and their non-transgenic littermates, we found a decelerated cytosolic calcium clearance in the presence of G93A hSOD1. While both non-transgenic as well as G93A hSOD1 motor neurons displayed large mitochondrial calcium uptake by the mitochondrial uniporter (mUP), the mitochondrial calcium extrusion system was altered in the presence of G93A hSOD1. In addition, ER calcium uptake by the sarco-/endoplasmic reticulum ATPase (SERCA) was increased in G93A hSOD1 motor neurons. In survival assays, blocking the mitochondrial sodium calcium exchanger (mNCE) by CGP37157 as well as inhibiting SERCA by cyclopiazonic acid showed protective effects against kainate induced excitotoxicity. Thus, our study shows for the first time that the functional consequence of G93A hSOD1 overexpression in intact motor neurons is indeed a disturbance of the ER mitochondria calcium cycle, and identified two promising targets for therapeutic intervention in the pathology of ALS.
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Affiliation(s)
- Janin Lautenschläger
- Hans Berger Department of Neurology, Jena University Hospital, Erlanger Allee 101, 07747 Jena, Germany.
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Chojnacki C, Walecka-Kapica E, Mokwinska M, Romanowski M, Pawlowicz M, Chojnacki J, Klupinska G. Influence of tianeptine on melatonin homeostasis and psychosomatic symptoms in patients with irritable bowel syndrome. J Physiol Pharmacol 2013; 64:177-183. [PMID: 23756392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 04/15/2013] [Indexed: 06/02/2023]
Abstract
UNLABELLED Selective serotonin reuptake inhibitors (SSRIs) exert beneficial effect on gastrointestinal tract (GIT), but its mechanism has not been recognized. One of the hypothesis assumes, that fluoxetine increases indirectly melatonin production. For this reason it can be hypothesized, that administration of drugs of opposite effect, for example tianepine (selective serotonin reuptake enhancer (SSRE), can reduce melatonin production resulting in harmful effects as regards GIT. The aim of the study was to confirm or reject this hypothesis. The study included 100 patients, aged 21-58 years, with irritable bowel syndrome (IBS). Basing on the Rome III Criteria patients with constipation-predominant (IBS-C, n=50) and with diarrhoea-predominant (IBS-D, n=50) and 25 health volunteers (control group C) were distinguished. Visual Analog Scale (VAS) and Hamilton Depression Rating Scale (HDRS) were used to determine the severity of somatic and psychic symptoms. The concentration of 6-sultatoxymelatonin (6-HMS) in the urine was measured by ELISA method. In both groups the patients were administrated tianeptine 12.5 mg three times daily or placebo for 8 weeks. After 8 weeks of tianeptine therapy no significant changes were found in urinary 6-HMS excretion both in IBS-C group (9.9±3.2 versus 11.5±3.5 μg/24 h) and in IBS-D group (11.8±3.3 versus 12.2±3.5 μg/24 h). Eight-week tianeptine therapy resulted in significant decrease of somatic and psychic symptoms in both investigated groups. The improvement in the quality of life indices was obtained in 76.5% of IBS-C and in 63.3% of IBS-D patients. CONCLUSIONS tianeptine does not impair melatonin homeostasis in patients with IB, diminishes IBS symptoms and improves the patients' quality of life.
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Affiliation(s)
- C Chojnacki
- Department of Clinical Nutrition, Medical University of Lodz, Lodz, Poland.
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Della FP, Abelaira HM, Réus GZ, Santos MABD, Tomaz DB, Antunes AR, Scaini G, Morais MOS, Streck EL, Quevedo J. Treatment with tianeptine induces antidepressive-like effects and alters the neurotrophin levels, mitochondrial respiratory chain and cycle Krebs enzymes in the brain of maternally deprived adult rats. Metab Brain Dis 2013; 28:93-105. [PMID: 23325329 DOI: 10.1007/s11011-012-9375-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 12/28/2012] [Indexed: 10/27/2022]
Abstract
Maternally deprived rats were treated with tianeptine (15 mg/kg) once a day for 14 days during their adult phase. Their behavior was then assessed using the forced swimming and open field tests. The BDNF, NGF and energy metabolism were assessed in the rat brain. Deprived rats increased the immobility time, but tianeptine reversed this effect and increased the swimming time; the BDNF levels were decreased in the amygdala of the deprived rats treated with saline and the BDNF levels were decreased in the nucleus accumbens within all groups; the NGF was found to have decreased in the hippocampus, amygdala and nucleus accumbens of the deprived rats; citrate synthase was increased in the hippocampus of non-deprived rats treated with tianeptine and the creatine kinase was decreased in the hippocampus and amygdala of the deprived rats; the mitochondrial complex I and II-III were inhibited, and tianeptine increased the mitochondrial complex II and IV in the hippocampus of the non-deprived rats; the succinate dehydrogenase was increased in the hippocampus of non-deprived rats treated with tianeptine. So, tianeptine showed antidepressant effects conducted on maternally deprived rats, and this can be attributed to its action on the neurochemical pathways related to depression.
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Affiliation(s)
- Franciela P Della
- Laboratório de Neurociências, Instituto Nacional de Ciência e Tecnologia Translacional em Medicina, and Núcleo de Excelência em Neurociências Aplicadas de Santa Catarina, Programa de Pós-Graduação em Ciências da Saúde, Unidade Acadêmica de Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil
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40
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Mei Y, Xu L, Kramer HF, Tomberlin GH, Townsend C, Meissner G. Stabilization of the skeletal muscle ryanodine receptor ion channel-FKBP12 complex by the 1,4-benzothiazepine derivative S107. PLoS One 2013; 8:e54208. [PMID: 23349825 PMCID: PMC3547879 DOI: 10.1371/journal.pone.0054208] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 12/10/2012] [Indexed: 12/12/2022] Open
Abstract
Activation of the skeletal muscle ryanodine receptor (RyR1) complex results in the rapid release of Ca2+ from the sarcoplasmic reticulum and muscle contraction. Dissociation of the small FK506 binding protein 12 subunit (FKBP12) increases RyR1 activity and impairs muscle function. The 1,4-benzothiazepine derivative JTV519, and the more specific derivative S107 (2,3,4,5,-tetrahydro-7-methoxy-4-methyl-1,4-benzothiazepine), are thought to improve skeletal muscle function by stabilizing the RyR1-FKBP12 complex. Here, we report a high degree of nonspecific and specific low affinity [3H]S107 binding to SR vesicles. SR vesicles enriched in RyR1 bound ∼48 [3H]S107 per RyR1 tetramer with EC50 ∼52 µM and Hillslope ∼2. The effects of S107 and FKBP12 on RyR1 were examined under conditions that altered the redox state of RyR1. S107 increased FKBP12 binding to RyR1 in SR vesicles in the presence of reduced glutathione and the NO-donor NOC12, with no effect in the presence of oxidized glutathione. Addition of 0.15 µM FKBP12 to SR vesicles prevented FKBP12 dissociation; however, in the presence of oxidized glutathione and NOC12, FKBP12 dissociation was observed in skeletal muscle homogenates that contained 0.43 µM myoplasmic FKBP12 and was attenuated by S107. In single channel measurements with FKBP12-depleted RyR1s, in the absence and presence of NOC12, S107 augmented the FKBP12-mediated decrease in channel activity. The data suggest that S107 can reverse the harmful effects of redox active species on SR Ca2+ release in skeletal muscle by binding to RyR1 low affinity sites.
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Affiliation(s)
- Yingwu Mei
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Le Xu
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Henning F. Kramer
- GlaxoSmithKline Research and Development, Research Triangle Park, North Carolina, United States of America
| | - Ginger H. Tomberlin
- GlaxoSmithKline Research and Development, Research Triangle Park, North Carolina, United States of America
| | - Claire Townsend
- GlaxoSmithKline Research and Development, Research Triangle Park, North Carolina, United States of America
| | - Gerhard Meissner
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
- * E-mail:
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Bagmetova VV, Chernysheva IV, Merkushenkova OV, Berestovitskaia VM, Tiurenkov IN. [Antidepressant properties of beta-phenylglutamic acid hydrochloride (RGPU-135, glutarone) in comparison to imipramine, tianeptine, and fluoxetine]. Eksp Klin Farmakol 2013; 76:7-9. [PMID: 23767095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The new glutamic acid derivative--beta-phenylglutamic acid hydrochloride (RGPU-135, glutarone) (in a dose of 26 mg/kg), imipramine (15 mg/kg), tianeptine (2.5 mg/kg) and fluoxetine (20 mg/kg), show antidepressant action in the tail suspension test and Porsolt swim test. All these drugs cause reduction in the intensity of depressive behavior and lead to increase in the rate of active behavior of avoidance of aversive situation with animals. The RGPU-135 compound shows antidepressant activity equal to that of imipramine, which is statistically significantly more pronounced than that of fluoxetine and tianeptine.
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Chang Y, Huang SK, Wang SJ. Coenzyme Q10 inhibits the release of glutamate in rat cerebrocortical nerve terminals by suppression of voltage-dependent calcium influx and mitogen-activated protein kinase signaling pathway. J Agric Food Chem 2012; 60:11909-11918. [PMID: 23167655 DOI: 10.1021/jf302875k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study investigates the effects and possible mechanism of coenzyme Q10 (CoQ10) on endogenous glutamate release in the cerebral cortex nerve terminals of rats. CoQ10 inhibited the release of glutamate evoked by the K+ channel blocker 4-aminopyridine (4-AP). CoQ10 reduced the depolarization-induced increase in cytosolic [Ca2+]c but did not alter the 4-AP-mediated depolarization. The effect of CoQ10 on evoked glutamate release was abolished by blocking the Cav2.2 (N-type) and Cav2.1 (P/Q-type) Ca2+ channels and mitogen-activated protein kinase kinase (MEK). In addition, CoQ10 decreased the 4-AP-induced phosphorylation of extracellular signal-regulated kinase 1 and 2 (ERK1/2) and synaptic vesicle-associated protein synapsin I, a major presynaptic substrate for ERK. Moreover, the inhibition of glutamate release by CoQ10 was strongly attenuated in mice without synapsin I. These results suggest that CoQ10 inhibits glutamate release from cortical synaptosomes in rats through the suppression of the presynaptic voltage-dependent Ca2+ entry and ERK/synapsin I signaling pathway.
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Affiliation(s)
- Yi Chang
- School of Medicine, Fu Jen Catholic University, and Department of Anesthesiology, Far-EAstern Memorial Hospital, No. 510 Zhongzheng Road, Xinzhuang District, New Taipei City, Taiwan 24205
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Upadhyay K, Manvar A, Rawal K, Joshi S, Trivedi J, Chaniyara R, Shah A. Evaluation of structurally diverse benzoazepines clubbed with coumarins as Mycobacterium tuberculosis agents. Chem Biol Drug Des 2012; 80:1003-8. [PMID: 22726534 DOI: 10.1111/j.1747-0285.2012.01436.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tuberculosis caused by Mycobacterium tuberculosis remains a leading cause of mortality worldwide into 21st century. In continuation with our anti-tuberculosis research programme, in this work, we have prepared molecularly diverse coumarins clubbed with benzothiazepines as well as its aza-analogues-benzodiazepines by molecular hybridization. The resulting compounds were screened for their M. tuberculosis activity against H(37) Rv strains using microplate alamar blue assay. Among the designed diversity, the compounds 5k, 5n and 5o were found significantly active in primary anti-tuberculosis assay at minimum inhibitory concentration <6.25 μm. Moreover, the IC(50) values of 5k and 5o in level-2 screening were observed as >10 μg/mL and 3.63 μg/mL, respectively. Design and synthesis of more focused library and its three-dimensional quantitative structure activity relationship analysis are underway.
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Vidal-Infer A, Roger-Sánchez C, Daza-Losada M, Aguilar MA, Miñarro J, Rodríguez-Arias M. Role of the dopaminergic system in the acquisition, expression and reinstatement of MDMA-induced conditioned place preference in adolescent mice. PLoS One 2012; 7:e43107. [PMID: 22916213 PMCID: PMC3420895 DOI: 10.1371/journal.pone.0043107] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Accepted: 07/19/2012] [Indexed: 12/16/2022] Open
Abstract
Background The rewarding effects of 3,4-methylenedioxy-metamphetamine (MDMA) have been demonstrated in conditioned place preference (CPP) procedures, but the involvement of the dopaminergic system in MDMA-induced CPP and reinstatement is poorly understood. Methodology/Principal Findings In this study, the effects of the DA D1 antagonist SCH 23390 (0.125 and 0.250 mg/kg), the DA D2 antagonist Haloperidol (0.1 and 0.2 mg/kg), the D2 antagonist Raclopride (0.3 and 0.6 mg/kg) and the dopamine release inhibitor CGS 10746B (3 and 10 mg/kg) on the acquisition, expression and reinstatement of a CPP induced by 10 mg/kg of MDMA were evaluated in adolescent mice. As expected, MDMA significantly increased the time spent in the drug-paired compartment during the post-conditioning (Post-C) test, and a priming dose of 5 mg/kg reinstated the extinguished preference. The higher doses of Haloperidol, Raclopride and CGS 10746B and both doses of SCH 23390 blocked acquisition of the MDMA-induced CPP. However, only Haloperidol blocked expression of the CPP. Reinstatement of the extinguished preference was not affected by any of the drugs studied. Analysis of brain monoamines revealed that the blockade of CPP acquisition was accompanied by an increase in DA concentration in the striatum, with a concomitant decrease in DOPAC and HVA levels. Administration of haloperidol during the Post-C test produced increases in striatal serotonin, DOPAC and HVA concentrations. In mice treated with the higher doses of haloperidol and CGS an increase in SERT concentration in the striatum was detected during acquisition of the CPP, but no changes in DAT were observed. Conclusions/Significance These results demonstrate that, in adolescent mice, the dopaminergic system is involved in the acquisition and expression of MDMA-induced CPP, but not in its reinstatement.
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Affiliation(s)
- Antonio Vidal-Infer
- Unit of Research on Psychobiology of Drug Dependence, University of Valencia, Valencia, Spain
| | | | - Manuel Daza-Losada
- Unit of Research on Psychobiology of Drug Dependence, University of Valencia, Valencia, Spain
| | - María A. Aguilar
- Unit of Research on Psychobiology of Drug Dependence, University of Valencia, Valencia, Spain
| | - José Miñarro
- Unit of Research on Psychobiology of Drug Dependence, University of Valencia, Valencia, Spain
| | - Marta Rodríguez-Arias
- Unit of Research on Psychobiology of Drug Dependence, University of Valencia, Valencia, Spain
- * E-mail:
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Oreščanin-Dušić Z, Miljević CD, Slavić M, Nikolić-Kokić A, Paskulin R, Blagojević D, Lečić-Toševski D, Spasić MB. Tianeptine's effects on spontaneous and Ca2+-induced uterine smooth muscle contraction. Acta Physiol Hung 2012; 99:140-147. [PMID: 22849838 DOI: 10.1556/aphysiol.99.2012.2.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Tianeptine is a novel anti-depressant with an efficacy equivalent to that of classical anti-depressants. Additional beneficial effects include neuroprotection, anti-stress and anti-ulcer properties whose molecular mechanisms are still not completely understood but may involve changes in the anti-oxidant defence system. Herein, we have studied the effects of tianeptine on both contractile activity of isolated rat uteri and components of the endogenous anti-oxidative defence system. Tianeptine-induced dose-dependent inhibition of both spontaneous and Ca2+-induced contraction of uterine smooth muscle. The effect was more pronounced in the latter. Tianeptine treatment increased glutathione peroxidase (GSH-Px) and catalase (CAT) activities in spontaneous and Ca2+-stimulated uteri. A significant decrease in glutathione-reductase (GR) activity in both spontaneous and Ca2+-induced uterine contractions after tianeptine treatment indicated a reduction in reduced glutathione and consequently a shift toward a more oxidised state in the treated uteri. In spontaneously contracting uteri, tianeptine caused a decrease in copper-zinc SOD (CuZnSOD) activity. Tianeptine's anti-depressant effects may be accomplished by triggering a cascade of cellular adaptations including inhibition of smooth muscle contractility and an adequate anti-oxidative protection response.
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Affiliation(s)
- Zorana Oreščanin-Dušić
- Department of Physiology, Institute for Biological Research, University of Belgrade, Despota Stefana 142 11000, [corrected] Belgrade, Serbia.
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Yaniv Y, Spurgeon HA, Lyashkov AE, Yang D, Ziman BD, Maltsev VA, Lakatta EG. Crosstalk between mitochondrial and sarcoplasmic reticulum Ca2+ cycling modulates cardiac pacemaker cell automaticity. PLoS One 2012; 7:e37582. [PMID: 22666369 PMCID: PMC3362629 DOI: 10.1371/journal.pone.0037582] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 04/22/2012] [Indexed: 01/02/2023] Open
Abstract
Background Mitochondria dynamically buffer cytosolic Ca2+ in cardiac ventricular cells and this affects the Ca2+ load of the sarcoplasmic reticulum (SR). In sinoatrial-node cells (SANC) the SR generates periodic local, subsarcolemmal Ca2+ releases (LCRs) that depend upon the SR load and are involved in SANC automaticity: LCRs activate an inward Na+-Ca2+ exchange current to accelerate the diastolic depolarization, prompting the ensemble of surface membrane ion channels to generate the next action potential (AP). Objective To determine if mitochondrial Ca2+ (Ca2+m), cytosolic Ca2+ (Ca2+c)-SR-Ca2+ crosstalk occurs in single rabbit SANC, and how this may relate to SANC normal automaticity. Results Inhibition of mitochondrial Ca2+ influx into (Ru360) or Ca2+ efflux from (CGP-37157) decreased [Ca2+]m to 80±8% control or increased [Ca2+]m to 119±7% control, respectively. Concurrent with inhibition of mitochondrial Ca2+ influx or efflux, the SR Ca2+ load, and LCR size, duration, amplitude and period (imaged via confocal linescan) significantly increased or decreased, respectively. Changes in total ensemble LCR Ca2+ signal were highly correlated with the change in the SR Ca2+ load (r2 = 0.97). Changes in the spontaneous AP cycle length (Ru360, 111±1% control; CGP-37157, 89±2% control) in response to changes in [Ca2+]m were predicted by concurrent changes in LCR period (r2 = 0.84). Conclusion A change in SANC Ca2+m flux translates into a change in the AP firing rate by effecting changes in Ca2+c and SR Ca2+ loading, which affects the characteristics of spontaneous SR Ca2+ release.
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Affiliation(s)
- Yael Yaniv
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
| | - Harold A. Spurgeon
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
| | - Alexey E. Lyashkov
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
| | - Dongmei Yang
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
| | - Bruce D. Ziman
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
| | - Victor A. Maltsev
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
| | - Edward G. Lakatta
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
- * E-mail:
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Hong Q, Qi K, Feng Z, Huang Z, Cui S, Wang L, Fu B, Ding R, Yang J, Chen X, Wu D. Hyperuricemia induces endothelial dysfunction via mitochondrial Na+/Ca2+ exchanger-mediated mitochondrial calcium overload. Cell Calcium 2012; 51:402-10. [PMID: 22361139 DOI: 10.1016/j.ceca.2012.01.003] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Revised: 12/20/2011] [Accepted: 01/09/2012] [Indexed: 02/04/2023]
Abstract
BACKGROUND Uric acid (UA) has proven to be a causal agent in endothelial dysfunction in which ROS production plays an important role. Calcium overload in mitochondria can promote the mitochondrial production of ROS. We hypothesize that calcium transduction in mitochondria contributes to UA-induced endothelial dysfunction. METHODS AND RESULTS We first demonstrated that high concentrations of UA cause endothelial dysfunction, marked by a reduction in eNOS protein expression and NO release in vitro. We further found that a high concentration of UA increased levels of [Ca2+]mito, total intracellular ROS, H2O2, and mitochondrial O2·-, and Δψmito but not the [Ca2+]cyt level. When the mitochondrial calcium channels NCXmito and MCU were blocked by CGP-37157 and Ru360, respectively, the UA-induced increases in the levels of [Ca2+]mito and total intracellular ROS were significantly reduced. Mitochondrial levels of O2·- and Δψmito were reduced by inhibition of NCXmito but not of MCU. Moreover, inhibition of NCXmito, but not of MCU, blocked the UA-induced reductions in eNOS protein expression and NO release. CONCLUSIONS The increased generation of mitochondrial O2·- induced by a high concentration of UA is triggered by mitochondrial calcium overload and ultimately leads to endothelial dysfunction. In this process, the activation of NCXmito is the major cause of the influx of calcium into mitochondria. Our results provide a new pathophysiological mechanism for UA-induced endothelial dysfunction and may offer a new therapeutic target for clinicians.
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Affiliation(s)
- Quan Hong
- Department of Nephrology, State Key Laboratory of Kidney Disease, Chinese PLA General Hospital, 2011DAV00088, Beijing 100853, PR China
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Bilge SS, Bozkurt A, Ilkaya F, Ciftcioğlu E, Kesim Y, Uzbay TI. The antinociceptive effects of intravenous tianeptine in colorectal distension-induced visceral pain in rats: the role of 5-HT₃ receptors. Eur J Pharmacol 2012; 681:44-9. [PMID: 22348811 DOI: 10.1016/j.ejphar.2012.01.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Revised: 01/20/2012] [Accepted: 01/28/2012] [Indexed: 11/18/2022]
Abstract
Tianeptine is an unusual tricyclic antidepressant drug. In this study, we aimed to investigate the antinociceptive effect of tianeptine on visceral pain in rats and to determine whether possible antinociceptive effect of tianeptine is mediated by serotonergic (5-HT(2,3)) and noradrenergic (α(1,2)) receptor subtypes. Male Sprague Dawley rats (250-300 g) were supplied with a venous catheter, for drug administrations, and enameled nichrome electrodes, for electromyography, at external oblique musculature. Colorectal distension (CRD) was employed as the noxious visceral stimulus and the visceromotor response (VMR) to CRD was quantified electromyographically before and 5, 15, 30, 60, 90 and 120 min after tianeptine administration. Antagonists were administered 10 min before tianeptine for their ability to change tianeptine antinociception. Intravenous administration of tianeptine (2.5-20 mg/kg) produced a dose-dependent reduction in VMR. Administration of 5-HT(3) receptor antagonist ondansetron (0.5, 1 and 2 mg/kg), but not 5-HT(2) receptor antagonist ketanserine (0.5, 1 and 2 mg/kg), reduced the antinociceptive effect of tianeptine (10mg/kg). In addition, administration of α(1)-adrenoceptor antagonist prazosin (1 mg/kg) or α(2)-adrenoceptor antagonist yohimbine (1 mg/kg) did not cause any significant effect on the tianeptine-induced antinociception. Our data indicate that intravenous tianeptine exerts a pronounced antinociception against CRD-induced visceral pain in rats, and suggests that the antinociceptive effect of tianeptine appears to be mediated in part by 5-HT(3) receptors, but does not involve 5-HT(2) receptors or α-adrenoceptors.
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MESH Headings
- Analgesics/administration & dosage
- Analgesics/pharmacology
- Animals
- Antidepressive Agents, Tricyclic/administration & dosage
- Antidepressive Agents, Tricyclic/pharmacology
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Electromyography
- Injections, Intravenous
- Male
- Rats
- Rats, Sprague-Dawley
- Receptors, Adrenergic, alpha/drug effects
- Receptors, Adrenergic, alpha/metabolism
- Receptors, Serotonin, 5-HT2/drug effects
- Receptors, Serotonin, 5-HT2/metabolism
- Receptors, Serotonin, 5-HT3/drug effects
- Receptors, Serotonin, 5-HT3/metabolism
- Thiazepines/administration & dosage
- Thiazepines/pharmacology
- Time Factors
- Visceral Pain/drug therapy
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Affiliation(s)
- S Sırrı Bilge
- Ondokuz Mayıs University, School of Medicine, Department of Pharmacology, Samsun, Turkey.
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Liu W, Shu XJ, Chen FY, Zhu C, Sun XH, Liu LJ, Ai YX, Li YG, Zhao H. Tianeptine reverses stress-induced asymmetrical hippocampal volume and N-acetylaspartate loss in rats: an in vivo study. Psychiatry Res 2011; 194:385-392. [PMID: 22047727 DOI: 10.1016/j.pscychresns.2011.02.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 01/30/2011] [Accepted: 02/10/2011] [Indexed: 02/05/2023]
Abstract
Stress-induced hippocampal volume loss and decrease in N-acetylaspartate (NAA) level have been reported to be associated with impaired neural plasticity and neuronal damage in adults. Accordingly, reversing structural and metabolite damage in the hippocampus may be a desirable goal for antidepressant therapy. The present study investigated the effects of tianeptine on chronic stress-induced hippocampal volume loss and metabolite alterations in vivo in 24 Sprague-Dawley rats. Rats were subjected to a consecutive 28-day forced swimming test stress. Tianeptine (50mg/kg) or saline was administered intragastrically 4h after swimming each day. Spontaneous behaviors, serum corticosterone concentration, hippocampal volume and NAA level were evaluated after stress. Chronic tianeptine treatment counteracted the chronic stress-induced suppression of spontaneous behaviors, elevated serum corticosterone concentration, reduced hippocampal volume and decreased NAA level. Moreover, we found asymmetrical right-left hippocampal volume loss in stressed rats, with the left hippocampus more sensitive to chronic stress than the right hippocampus. In addition, stressed rats showed a decreased level of hippocampal metabolites, without significant loss of hippocampal volume. These findings provide experimental evidence for impaired structural plasticity of the brain being an important feature of depressive illness and suggest that prophylactic tianeptine treatments could reverse structural changes in brain. The structural and neurochemical alterations in the hippocampus may be valuable indexes for evaluating the prophylactic and curative effect of antidepressant treatments in depressive and stress-related disorders.
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Affiliation(s)
- Wei Liu
- Department of Pathology and Pathophysiology, Shantou University Medical College, Shantou, 515041, Guangdong, China; Department of Pathology and Pathophysiology, Medical School, Jianghan University, Wuhan, 430056, Hubei, China
| | - Xi-Ji Shu
- Department of Pathology and Pathophysiology, Medical School, Jianghan University, Wuhan, 430056, Hubei, China
| | - Fu-Yin Chen
- Department of Forensic Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Cheng Zhu
- Department of Forensic Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Xiao-Hai Sun
- Department of Forensic Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Li-Jiang Liu
- Department of Pathology and Pathophysiology, Medical School, Jianghan University, Wuhan, 430056, Hubei, China
| | - Yong-Xun Ai
- Department of Pathology and Pathophysiology, Medical School, Jianghan University, Wuhan, 430056, Hubei, China
| | - Yu-Guang Li
- Department of Pathology and Pathophysiology, Shantou University Medical College, Shantou, 515041, Guangdong, China; Department of Cardiology, the First Affiliated Hospital of Shantou University Medical College, Shantou 515041, Guangdong, China.
| | - Hu Zhao
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China.
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Elliott EB, Hasumi H, Otani N, Matsuda T, Matsuda R, Kaneko N, Smith GL, Loughrey CM. K201 (JTV-519) alters the spatiotemporal properties of diastolic Ca(2+) release and the associated diastolic contraction during β-adrenergic stimulation in rat ventricular cardiomyocytes. Basic Res Cardiol 2011; 106:1009-22. [PMID: 21901290 PMCID: PMC3228956 DOI: 10.1007/s00395-011-0218-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 07/24/2011] [Accepted: 08/20/2011] [Indexed: 11/25/2022]
Abstract
K201 has previously been shown to reduce diastolic contractions in vivo during β-adrenergic stimulation and elevated extracellular calcium concentration ([Ca2+]o). The present study characterised the effect of K201 on electrically stimulated and spontaneous diastolic sarcoplasmic reticulum (SR)-mediated Ca2+ release and contractile events in isolated rat cardiomyocytes during β-adrenergic stimulation and elevated [Ca2+]o. Parallel experiments using confocal microscopy examined spontaneous diastolic Ca2+ release events at an enhanced spatiotemporal resolution. 1.0 μmol/L K201 in the presence of 150 nmol/L isoproterenol (ISO) and 4.75 mmol/L [Ca2+]o significantly decreased the amplitude of diastolic contractions to ~16% of control levels. The stimulated free Ca2+ transient amplitude was significantly reduced, but stimulated cell shortening was not significantly altered. When intracellular buffering was taken into account, K201 led to an increase in action potential-induced SR Ca2+ release. Myofilament sensitivity to Ca2+ was not changed by K201. Confocal microscopy revealed diastolic events composed of multiple Ca2+ waves (2–3) originating at various points along the cardiomyocyte length during each diastolic period. 1.0 μmol/L K201 significantly reduced the (a) frequency of diastolic events and (b) initiation points/diastolic interval in the remaining diastolic events to 61% and 71% of control levels respectively. 1.0 μmol/L K201 can reduce the probability of spontaneous diastolic Ca2+ release and their associated contractions which may limit the propensity for the contractile dysfunction observed in vivo.
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Affiliation(s)
- E. B. Elliott
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, University Place, Glasgow, G12 8TA UK
| | - H. Hasumi
- Department of Cardiovascular Medicine, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi Japan
| | - N. Otani
- Department of Cardiovascular Medicine, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi Japan
| | - T. Matsuda
- Department of Cardiovascular Medicine, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi Japan
| | - R. Matsuda
- Department of Preventative Medical Sciences for the Heart, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi Japan
| | - N. Kaneko
- Utsunomiya Memorial Hospital, Utsunomiya, Japan
| | - G. L. Smith
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, University Place, Glasgow, G12 8TA UK
| | - Christopher M. Loughrey
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, University Place, Glasgow, G12 8TA UK
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