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Migliore M, Pontis S, Fuentes de Arriba AL, Realini N, Torrente E, Armirotti A, Romeo E, Di Martino S, Russo D, Pizzirani D, Summa M, Lanfranco M, Ottonello G, Busquet P, Jung KM, Garcia-Guzman M, Heim R, Scarpelli R, Piomelli D. Second-Generation Non-Covalent NAAA Inhibitors are Protective in a Model of Multiple Sclerosis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603746] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Marco Migliore
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Silvia Pontis
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Angel Luis Fuentes de Arriba
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Natalia Realini
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Esther Torrente
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Andrea Armirotti
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Elisa Romeo
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Simona Di Martino
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Debora Russo
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Daniela Pizzirani
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Maria Summa
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Massimiliano Lanfranco
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Giuliana Ottonello
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Perrine Busquet
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Kwang-Mook Jung
- Departments of Anatomy and Neurobiology, Pharmacology and Biological Chemistry; University of California; Irvine CA 92697-4625 USA
| | - Miguel Garcia-Guzman
- Anteana Therapeutics; 11189 Sorrento Valley Road, Suite 104 San Diego CA 92121 USA
| | - Roger Heim
- Anteana Therapeutics; 11189 Sorrento Valley Road, Suite 104 San Diego CA 92121 USA
| | - Rita Scarpelli
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
| | - Daniele Piomelli
- Department of Drug Discovery and Development; Fondazione Istituto Italiano di Tecnologia; via Morego 30 16163 Genoa Italy
- Departments of Anatomy and Neurobiology, Pharmacology and Biological Chemistry; University of California; Irvine CA 92697-4625 USA
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2
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Migliore M, Pontis S, Fuentes de Arriba AL, Realini N, Torrente E, Armirotti A, Romeo E, Di Martino S, Russo D, Pizzirani D, Summa M, Lanfranco M, Ottonello G, Busquet P, Jung KM, Garcia-Guzman M, Heim R, Scarpelli R, Piomelli D. Second-Generation Non-Covalent NAAA Inhibitors are Protective in a Model of Multiple Sclerosis. Angew Chem Int Ed Engl 2016; 55:11193-11197. [PMID: 27404798 DOI: 10.1002/anie.201603746] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 05/11/2016] [Indexed: 11/11/2022]
Abstract
Palmitoylethanolamide (PEA) and oleoylethanolamide (OEA) are endogenous lipid mediators that suppress inflammation. Their actions are terminated by the intracellular cysteine amidase, N-acylethanolamine acid amidase (NAAA). Even though NAAA may offer a new target for anti-inflammatory therapy, the lipid-like structures and reactive warheads of current NAAA inhibitors limit the use of these agents as oral drugs. A series of novel benzothiazole-piperazine derivatives that inhibit NAAA in a potent and selective manner by a non-covalent mechanism are described. A prototype member of this class (8) displays high oral bioavailability, access to the central nervous system (CNS), and strong activity in a mouse model of multiple sclerosis (MS). This compound exemplifies a second generation of non-covalent NAAA inhibitors that may be useful in the treatment of MS and other chronic CNS disorders.
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Affiliation(s)
- Marco Migliore
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Silvia Pontis
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Angel Luis Fuentes de Arriba
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Natalia Realini
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Esther Torrente
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Andrea Armirotti
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Elisa Romeo
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Simona Di Martino
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Debora Russo
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Daniela Pizzirani
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Maria Summa
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Massimiliano Lanfranco
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Giuliana Ottonello
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Perrine Busquet
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Kwang-Mook Jung
- Departments of Anatomy and Neurobiology, Pharmacology and Biological Chemistry, University of California, Irvine, CA 92697-4625, USA
| | - Miguel Garcia-Guzman
- Anteana Therapeutics, 11189 Sorrento Valley Road, Suite 104, San Diego CA 92121, USA
| | - Roger Heim
- Anteana Therapeutics, 11189 Sorrento Valley Road, Suite 104, San Diego CA 92121, USA
| | - Rita Scarpelli
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
| | - Daniele Piomelli
- Department of Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy.,Departments of Anatomy and Neurobiology, Pharmacology and Biological Chemistry, University of California, Irvine, CA 92697-4625, USA
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3
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Morizot G, Kendjo E, Mouri O, Thellier M, Pérignon A, Foulet F, Cordoliani F, Bourrat E, Laffitte E, Alcaraz I, Bodak N, Ravel C, Vray M, Grogl M, Mazier D, Caumes E, Lachaud L, Buffet PA, El Samad Y, Salle V, Gounod N, Dallot A, Belot G, Pelletier-Cunat S, Belon M, Verdon R, Rogeaux O, Grossetête G, Lesens O, Clabaut A, Maus E, Jouy L, Gener G, Perrin P, Roch N, Herve A, Le Duc D, Cuchet E, Maubon D, Hillion B, Menot E, Guillemot F, Beneton-Benhard N, Celerier P, Dupuis De Fonclare AL, Carre D, Bourgeois A, Marty P, Pomares C, Meunier L, Abergel H, Timsit F, Amoric JC, Busquet P, Karam S, Moisson YF, Mouly F, Ortoli JC, Consigny PH, Jouan M, Caby F, Datry A, Hochedez P, Rozembaum F, Dumortier C, Ancelle T, Dupin N, Paugam A, Ranque B, Bougnoux ME, Canestri A, Galezowsky MF, Hadj Rabia S, Hamel D, Schneider P, Wolter-Desfosses M, Janier M, Baccard M, Bezier M, Broissin M, Colin De Verdiere N, Durupt F, Hope Rapp E, Juillard C, Levy A, Moraillon I, Petit A, Regner S, Barthelme D, Tamarin JM, Begon E, Strady C, Gangneux JP, Carpentier O, Mechai F, Kieffer C, Dellestable P, Rebauder S. Travelers With Cutaneous Leishmaniasis Cured Without Systemic Therapy. Clin Infect Dis 2013; 57:370-80. [DOI: 10.1093/cid/cit269] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- G. Morizot
- Unité d'Immunologie Moléculaire des Parasites, Institut Pasteur de Paris
| | | | - O. Mouri
- Service de Parasitologie-Mycologie
| | | | - A. Pérignon
- Service de Maladies Infectieuses et Tropicales, Hôpital Pitié-Salpêtrière, Paris
| | - F. Foulet
- Service de Parasitologie-Mycologie, Hôpital Henri Mondor, Créteil
| | | | - E. Bourrat
- Service de Dermatologie, Hôpital Saint-Louis, Paris
- Service de Pédiatrie générale, Hôpital Robert Debré, Paris, France
| | - E. Laffitte
- Clinique de Dermatologie, Hôpitaux Universitaires de Genève, Switzerland
| | - I. Alcaraz
- Service de Maladies Infectieuses et Pathologie du voyageur, Hôpital Gustave Dron, Tourcoing
| | - N. Bodak
- Service de Dermatologie, Hôpital Necker, Paris
| | - C. Ravel
- French Reference Centre on Leishmaniasis, Montpellier
| | - M. Vray
- Unité de Recherche et d'Expertise Épidémiologie des Maladies Émergentes, Institut Pasteur de Paris/INSERM, France
| | - M. Grogl
- Walter Reed Army Institute of Research, Silver Spring, Maryland
| | | | - E. Caumes
- Service de Maladies Infectieuses et Tropicales, Hôpital Pitié-Salpêtrière, Paris
| | - L. Lachaud
- French Reference Centre on Leishmaniasis, Montpellier
| | - P. A. Buffet
- Unité d'Immunologie Moléculaire des Parasites, Institut Pasteur de Paris
- Service de Parasitologie-Mycologie
- UMRs 945 INSERM–Paris 6 University, France
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Capurro V, Busquet P, Lopes JP, Bertorelli R, Tarozzo G, Bolognesi ML, Piomelli D, Reggiani A, Cavalli A. Pharmacological characterization of memoquin, a multi-target compound for the treatment of Alzheimer's disease. PLoS One 2013; 8:e56870. [PMID: 23441223 PMCID: PMC3575497 DOI: 10.1371/journal.pone.0056870] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [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: 11/20/2012] [Accepted: 01/15/2013] [Indexed: 11/18/2022] Open
Abstract
Alzheimer's disease (AD) is characterized by progressive loss of cognitive function, dementia and altered behavior. Over 30 million people worldwide suffer from AD and available therapies are still palliative rather than curative. Recently, Memoquin (MQ), a quinone-bearing polyamine compound, has emerged as a promising anti-AD lead candidate, mainly thanks to its multi-target profile. MQ acts as an acetylcholinesterase and β-secretase-1 inhibitor, and also possesses anti-amyloid and anti-oxidant properties. Despite this potential interest, in vivo behavioral studies with MQ have been limited. Here, we report on in vivo studies with MQ (acute and sub-chronic treatments; 7–15 mg/kg per os) carried out using two different mouse models: i) scopolamine- and ii) beta-amyloid peptide- (Aβ-) induced amnesia. Several aspects related to memory were examined using the T-maze, the Morris water maze, the novel object recognition, and the passive avoidance tasks. At the dose of 15 mg/kg, MQ was able to rescue all tested aspects of cognitive impairment including spatial, episodic, aversive, short and long-term memory in both scopolamine- and Aβ-induced amnesia models. Furthermore, when tested in primary cortical neurons, MQ was able to fully prevent the Aβ-induced neurotoxicity mediated by oxidative stress. The results support the effectiveness of MQ as a cognitive enhancer, and highlight the value of a multi-target strategy to address the complex nature of cognitive dysfunction in AD.
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Affiliation(s)
- Valeria Capurro
- Drug Discovery and Development, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Perrine Busquet
- Drug Discovery and Development, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Joao Pedro Lopes
- Drug Discovery and Development, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Rosalia Bertorelli
- Drug Discovery and Development, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Glauco Tarozzo
- Drug Discovery and Development, Istituto Italiano di Tecnologia, Genoa, Italy
| | | | - Daniele Piomelli
- Drug Discovery and Development, Istituto Italiano di Tecnologia, Genoa, Italy
- Departments of Anatomy and Neurobiology, Pharmacology and Biological Chemistry, University of California Irvine, Irvine, United States of America
| | - Angelo Reggiani
- Drug Discovery and Development, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Andrea Cavalli
- Drug Discovery and Development, Istituto Italiano di Tecnologia, Genoa, Italy
- Department of Pharmacy and Biotechnology, Bologna University, Bologna, Italy
- * E-mail:
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Busquet P, Capurro V, Cavalli A, Piomelli D, Reggiani A, Bertorelli R. Synergistic Effects of Galantamine and Memantine in Attenuating Scopolamine-Induced Amnesia in Mice. J Pharmacol Sci 2012; 120:305-9. [DOI: 10.1254/jphs.12166sc] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Bock G, Gebhart M, Scharinger A, Jangsangthong W, Busquet P, Poggiani C, Sartori S, Mangoni ME, Sinnegger-Brauns MJ, Herzig S, Striessnig J, Koschak A. Functional properties of a newly identified C-terminal splice variant of Cav1.3 L-type Ca2+ channels. J Biol Chem 2011; 286:42736-42748. [PMID: 21998310 PMCID: PMC3234942 DOI: 10.1074/jbc.m111.269951] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
An intramolecular interaction between a distal (DCRD) and a proximal regulatory domain (PCRD) within the C terminus of long Ca(v)1.3 L-type Ca(2+) channels (Ca(v)1.3(L)) is a major determinant of their voltage- and Ca(2+)-dependent gating kinetics. Removal of these regulatory domains by alternative splicing generates Ca(v)1.3(42A) channels that activate at a more negative voltage range and exhibit more pronounced Ca(2+)-dependent inactivation. Here we describe the discovery of a novel short splice variant (Ca(v)1.3(43S)) that is expressed at high levels in the brain but not in the heart. It lacks the DCRD but, in contrast to Ca(v)1.3(42A), still contains PCRD. When expressed together with α2δ1 and β3 subunits in tsA-201 cells, Ca(v)1.3(43S) also activated at more negative voltages like Ca(v)1.3(42A) but Ca(2+)-dependent inactivation was less pronounced. Single channel recordings revealed much higher channel open probabilities for both short splice variants as compared with Ca(v)1.3(L). The presence of the proximal C terminus in Ca(v)1.3(43S) channels preserved their modulation by distal C terminus-containing Ca(v)1.3- and Ca(v)1.2-derived C-terminal peptides. Removal of the C-terminal modulation by alternative splicing also induced a faster decay of Ca(2+) influx during electrical activities mimicking trains of neuronal action potentials. Our findings extend the spectrum of functionally diverse Ca(v)1.3 L-type channels produced by tissue-specific alternative splicing. This diversity may help to fine tune Ca(2+) channel signaling and, in the case of short variants lacking a functional C-terminal modulation, prevent excessive Ca(2+) accumulation during burst firing in neurons. This may be especially important in neurons that are affected by Ca(2+)-induced neurodegenerative processes.
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Affiliation(s)
- Gabriella Bock
- Institute of Pharmacy, Pharmacology and Toxicology and Center of Molecular Biosciences Innsbruck, Peter-Mayr-Strasse 1/I, A-6020 Innsbruck, Austria
| | - Mathias Gebhart
- Institute of Pharmacy, Pharmacology and Toxicology and Center of Molecular Biosciences Innsbruck, Peter-Mayr-Strasse 1/I, A-6020 Innsbruck, Austria
| | - Anja Scharinger
- Institute of Pharmacy, Pharmacology and Toxicology and Center of Molecular Biosciences Innsbruck, Peter-Mayr-Strasse 1/I, A-6020 Innsbruck, Austria
| | - Wanchana Jangsangthong
- Department of Pharmacology and Center for Molecular Medicine, University of Cologne, Gleueler Strasse 24 and Robert-Koch-Strasse 21, D-50931 Cologne, Germany
| | - Perrine Busquet
- Institute of Pharmacy, Pharmacology and Toxicology and Center of Molecular Biosciences Innsbruck, Peter-Mayr-Strasse 1/I, A-6020 Innsbruck, Austria
| | - Chiara Poggiani
- Institute of Pharmacy, Pharmacology and Toxicology and Center of Molecular Biosciences Innsbruck, Peter-Mayr-Strasse 1/I, A-6020 Innsbruck, Austria
| | - Simone Sartori
- Institute of Pharmacy, Pharmacology and Toxicology and Center of Molecular Biosciences Innsbruck, Peter-Mayr-Strasse 1/I, A-6020 Innsbruck, Austria
| | - Matteo E Mangoni
- Département de Physiologie, CNRS, UMR-5203, Institut de Génomique Fonctionnelle, F-34000 Montpellier, France; INSERM, U661, F-34000 Montpellier, France; Universités de Montpellier 1 & 2, UMR-5203, F-34000 Montpellier, France; INSERM, U637, Montpellier, France
| | - Martina J Sinnegger-Brauns
- Institute of Pharmacy, Pharmacology and Toxicology and Center of Molecular Biosciences Innsbruck, Peter-Mayr-Strasse 1/I, A-6020 Innsbruck, Austria
| | - Stefan Herzig
- Department of Pharmacology and Center for Molecular Medicine, University of Cologne, Gleueler Strasse 24 and Robert-Koch-Strasse 21, D-50931 Cologne, Germany
| | - Jörg Striessnig
- Institute of Pharmacy, Pharmacology and Toxicology and Center of Molecular Biosciences Innsbruck, Peter-Mayr-Strasse 1/I, A-6020 Innsbruck, Austria.
| | - Alexandra Koschak
- Institute of Pharmacy, Pharmacology and Toxicology and Center of Molecular Biosciences Innsbruck, Peter-Mayr-Strasse 1/I, A-6020 Innsbruck, Austria.
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Juhasz-Vedres G, Scharinger A, Gebhart M, Busquet P, Poggiani C, Sartori SB, Sinnegger-Brauns MJ, Koschak A, Striessnig J. Identification of a new C-terminal splice variant of CaV1.3 L-type calcium channels with unique functional properties. BMC Pharmacol 2011. [PMCID: PMC3194279 DOI: 10.1186/1471-2210-11-s2-a44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
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Busquet P, Nguyen NK, Schmid E, Tanimoto N, Seeliger MW, Ben-Yosef T, Mizuno F, Akopian A, Singewald N, Striessnig J. CaV1.3 L-type calcium channels modulate depression-like behavior in mice independent of deaf phenotype. BMC Pharmacol 2009. [PMCID: PMC2778891 DOI: 10.1186/1471-2210-9-s2-a21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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9
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Busquet P, Hetzenauer A, Sinnegger-Brauns MJ, Striessnig J, Singewald N. Role of L-type Ca2+ channel isoforms in the extinction of conditioned fear. Learn Mem 2008; 15:378-86. [PMID: 18441296 PMCID: PMC2364608 DOI: 10.1101/lm.886208] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [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: 12/18/2007] [Accepted: 02/15/2008] [Indexed: 11/24/2022]
Abstract
Dihydropyridine (DHP) L-type Ca(2+) channel (LTCC) antagonists, such as nifedipine, have been reported to impair the extinction of conditioned fear without interfering with its acquisition. Identification of the LTCC isoforms mediating this DHP effect is an essential basis to reveal their role as potential drug targets for the treatment of specific anxiety disorders. Ca(V)1.2 and Ca(V)1.3 are the predominant LTCCs in the mammalian brain. However, since no isoform-selective DHP blockers are available, their individual contribution to fear memory extinction is unknown. We used a novel mouse model expressing DHP-insensitive Ca(V)1.2 LTCCs (Ca(V)1.2DHP(-/-) mice) to address this question. In line with previous studies, wild-type (WT) mice treated with systemic nifedipine displayed markedly impaired fear extinction. This DHP effect was completely abolished in Ca(V)1.2DHP(-/-) mice, indicating that it is mediated by Ca(V)1.2, but not by Ca(V)1.3 LTCCs. Supporting this conclusion, Ca(V)1.3-deficient mice (Ca(V)1.3(-/-)) showed extinction identical to the respective WT mice. The inhibition of fear extinction was not observed after intracerebroventricular (i.c.v.) application of different doses of nifedipine, suggesting that this effect is secondary to inhibition of peripheral Ca(V)1.2 channels. The LTCC activator BayK, which lacks neurotoxic effects in Ca(V)1.2DHP(-/-) mice, did not influence the extinction time course. In summary, we demonstrate that LTCC signaling through the Ca(V)1.2 isoform of LTCCs interferes with fear memory extinction, presumably via a peripherally mediated mechanism. Activation of other LTCC isoforms (predominantly Ca(V)1.3) is not sufficient to accelerate extinction of conditioned fear in mice.
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Affiliation(s)
- Perrine Busquet
- Department of Pharmacology and Toxicology, Institute of Pharmacy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, A-6020 Innsbruck, Austria
| | - Alfred Hetzenauer
- Department of Pharmacology and Toxicology, Institute of Pharmacy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, A-6020 Innsbruck, Austria
| | - Martina J. Sinnegger-Brauns
- Department of Pharmacology and Toxicology, Institute of Pharmacy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, A-6020 Innsbruck, Austria
| | - Jörg Striessnig
- Department of Pharmacology and Toxicology, Institute of Pharmacy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, A-6020 Innsbruck, Austria
| | - Nicolas Singewald
- Department of Pharmacology and Toxicology, Institute of Pharmacy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, A-6020 Innsbruck, Austria
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Striessnig J, Koschak A, Sinnegger-Brauns MJ, Hetzenauer A, Nguyen NK, Busquet P, Pelster G, Singewald N. Role of voltage-gated L-type Ca2+ channel isoforms for brain function. Biochem Soc Trans 2006; 34:903-9. [PMID: 17052224 DOI: 10.1042/bst0340903] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.4] [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] [Indexed: 11/17/2022]
Abstract
Voltage-gated LTCCs (L-type Ca2+ channels) are established drug targets for the treatment of cardiovascular diseases. LTCCs are also expressed outside the cardiovascular system. In the brain, LTCCs control synaptic plasticity in neurons, and DHP (dihydropyridine) LTCC blockers such as nifedipine modulate brain function (such as fear memory extinction and depression-like behaviour). Voltage-sensitive Ca2+ channels Cav1.2 and Cav1.3 are the predominant brain LTCCs. As DHPs and other classes of organic LTCC blockers inhibit both isoforms, their pharmacological distinction is impossible and their individual contributions to defined brain functions remain largely unknown. Here, we summarize our recent experiments with two genetically modified mouse strains, which we generated to explore the individual biophysical features of Cav1.2 and Cav1.3 LTCCs and to determine their relative contributions to various physiological peripheral and neuronal functions. The results described here also allow predictions about the pharmacotherapeutic potential of isoform-selective LTCC modulators.
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Affiliation(s)
- J Striessnig
- Department of Pharmacology and Toxicology, Institute for Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Peter-Mayrstr. 1/I, A-6020 Innsbruck, Austria.
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Nadjar A, Combe C, Busquet P, Dantzer R, Parnet P. Signaling pathways of interleukin-1 actions in the brain: anatomical distribution of phospho-ERK1/2 in the brain of rat treated systemically with interleukin-1beta. Neuroscience 2005; 134:921-32. [PMID: 16039791 DOI: 10.1016/j.neuroscience.2005.04.035] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [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: 01/28/2005] [Revised: 04/15/2005] [Accepted: 04/16/2005] [Indexed: 11/28/2022]
Abstract
Interleukin-1beta is released at the periphery during infection and acts on the nervous system to induce fever, neuroendocrine activation, and behavioral changes. These effects are mediated by brain type I IL-1 receptors. In vitro studies have shown the ability of interleukin-1beta to activate mitogen-activated protein kinase signaling pathways including p38, c-Jun N-terminal kinase and extracellular signal-regulated protein kinase 1 and 2 (ERK1/2). In contrast to other mitogen-activated protein kinases, little is known about ERK1/2 activation in the rat brain in response to interleukin-1beta. The aim of the present study was therefore to investigate spatial and temporal activation of ERK1/2 in the rat brain after peripheral administration of interleukin-1beta using immunohistochemistry to detect the phosphorylated form of the kinase. In non-stimulated conditions, phosphorylated ERK1/2 immunoreactivity was observed in neurons throughout the brain. Administration of interleukin-1beta (60 microg/kg, i.p.) induced the phosphorylation of ERK1/2 in areas at the interface between brain and blood or cerebrospinal fluid: meninges, circumventricular organs, endothelial like cells of the blood vessels, and in brain nuclei involved in behavioral depression, fever and neuroendocrine activation: paraventricular nucleus of the hypothalamus, supraoptic nucleus, central amygdala and arcuate nucleus. Double labeling of phosphorylated ERK1/2 and cell markers revealed the expression of phosphorylated ERK1/2 in neurons, astrocytes and microglia. Since phosphorylated ERK1/2 was found in structures in which type I IL-1 receptor has already been identified as well as in structures lacking this receptor, activation of ERK1/2 is likely to occur in response to both direct and indirect action of interleukin-1beta on its target cells.
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Affiliation(s)
- A Nadjar
- INRA UMR1244, CNRS FRE2723, rue C. Saint-Saëns, Institut Francois Magendie, Universite Victor Segalen Bordeaux 2, 33077 Bordeaux Cedex, France.
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12
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Himbert C, Lascault G, Tonet J, Coutte R, Busquet P, Frank R, Grosgogeat Y. [Ventricular tachycardia in a patient with rate-responsive cardiac pacemaker]. Arch Mal Coeur Vaiss 1992; 85:1605-8. [PMID: 1300959] [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] [Indexed: 12/26/2022]
Abstract
The authors report a case of syncopal ventricular tachycardia in a patient with a respiratory-dependent rate responsive pacemaker, followed-up for valvular heart disease with severe left ventricular dysfunction and sustained atrial and ventricular arrhythmias. The introduction of low dose betablocker therapy with reinforcement of the treatment of cardiac failure controlled the ventricular arrhythmia, after suppression of the data responsive function had been shown to be ineffective. The authors discuss the role of the rate responsive function in the triggering of the ventricular tachycardias.
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Affiliation(s)
- C Himbert
- Centre de stimulation cardiaque et de rythmologie, hôpital Jean-Rostand, Ivry-sur-Seine
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Montalescot G, Thomas D, Drobinski G, Evans JI, Vicaut E, Chatellier G, Whyte RI, Busquet P, Bejean-Lebuisson A, Grosgogeat Y. Clinical and ultrasound results after aortic valve replacement: intermediate-term follow-up with the St. Jude Medical prosthesis. Am Heart J 1989; 118:104-13. [PMID: 2741777 DOI: 10.1016/0002-8703(89)90079-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [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] [Indexed: 01/02/2023]
Abstract
Mortality, morbidity, quality of life, and left ventricular (LV) function were evaluated in 49 patients after aortic valve replacement with the St. Jude prosthesis. Total follow-up was 2577 patient-months; survivors were followed-up for 4 to 7 years by clinical examination and echocardiography. The actuarial survival rate at 6 years was 79.6%, and there were no valve-related deaths. The linearized rates for thromboembolism and hemorrhage were 0.93% and 3.26% per patient-year, respectively. In 34% of the survivors the quality of life was poor. In the first three postoperative months, patients with aortic stenosis (n = 12) had a significant decrease in the muscle cross-sectional area (p less than 0.01) and patients with aortic regurgitation (n = 11) had decreases in both LV end-diastolic diameter (p less than 0.05) and cross-sectional area (p less than 0.001). All of these results were maintained at 5 years without modification of LV systolic function. Despite the good overall results, six patients deteriorated and had major LV dilatation. Multivariate logistic regression analysis identified two independent preoperative variables associated with a poor outcome defined as death of LV dysfunction (p less than 0.05): age and end-diastolic diameter. Thus meticulous follow-up showed a high incidence of hemorrhage and a poor quality of life in many of the survivors. It was concluded that in high-risk patients (age and end-diastolic diameter) surgery should probably be considered earlier.
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Affiliation(s)
- G Montalescot
- Service de Cardiologie, Hôpital Pitié-Salpétrière, Paris, France
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Kalotka-Bratek H, Drobinski G, Klimczak K, Busquet P, Fraysse JB, Bejean-Lebuisson A, Grosgogeat Y. [Doppler ultrasound evaluation of aortic insufficiency using half-pressure time. Absence of arterial rigidity influence]. Arch Mal Coeur Vaiss 1989; 82:215-9. [PMID: 2500082] [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] [Indexed: 01/01/2023]
Abstract
In 20 patients with pure aortic regurgitation we studied the relationship between the severity of regurgitation, as assessed haemodynamically by the percentage of leakage (%L), and the half-pressure (T 1/2 P) and half-velocity (T 1/2 V) times, as obtained from doppler aortic blood velocity curves, taking into account the rigidity of the systemic vascular circuit characterized by the pressure wave propagation velocity (PWPV). The systemic arterial circuit was supple in 14 patients (PWPV less than 7.5 m/sec) and rigid in 6 patients (PWPV greater than 7.5 m/sec). The regression slopes between %L and T 1/2 P and between %L and T 1/2 V were calculated with their confidence limits in the 14 patients with supple arteries. The 6 patients with rigid arteries fitted into this nomogram, thus demonstrating that systemic arterial rigidity makes no difference in the relationship between %L and doppler indices. The half-velocity and half-pressure times measured by doppler ultrasound were acquired from a velocity signal directly determined by the aortic regurgitation, without any detectable effect of vascular circuit rigidity. Being equivalent by nature to the signal decrease time constant, they are independent of the absolute protodiastolic value of diastolic pressure gradient or blood flow velocity. For this reason these two doppler parameters are reliable to evaluate the severity of aortic regurgitation.
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Affiliation(s)
- H Kalotka-Bratek
- CSK académie médicale, service de cardiologie, Varsovie, Pologne
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