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16 results on '"MESH: Pituitary Adenylate Cyclase-Activating Polypeptide"'

1. Delayed Pituitary Adenylate Cyclase–Activating Polypeptide Delivery After Brain Stroke Improves Functional Recovery by Inducing M2 Microglia/Macrophage Polarization

Author

Victor May, David Vaudry, Coralie Brifault, Marjorie Gras, Olivier Wurtz, Donovan Liot, Neuroendocrinologie cellulaire et moléculaire, Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), University of Vermont College of Medicine, University of Vermont [Burlington], International Associated laboratory Samuel de Champlain, Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), Différenciation et communication neuronale et neuroendocrine (DC2N), Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), and Normandie Université (NU)-Normandie Université (NU)

Subjects
Male, Time Factors, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, microglia, Pharmacology, [SDV.IMM.II]Life Sciences [q-bio]/Immunology/Innate immunity, Mice, Drug Delivery Systems, MESH: Animals, Stroke, Microglia, Brain, Cell Polarity, MESH: Recovery of Function, stroke, pituitary adenylate cyclase-activating polypeptide, MESH: Microglia, medicine.anatomical_structure, [SDV.IMM.IA]Life Sciences [q-bio]/Immunology/Adaptive immunology, medicine.symptom, Stem cell, MESH: Stem Cell Transplantation, MESH: Cell Polarity, MESH: Injections, Intraventricular, Cardiology and Cardiovascular Medicine, Programmed cell death, Mice, 129 Strain, MESH: Mice, Transgenic, MESH: Drug Delivery Systems, Ischemia, Adenylate kinase, Inflammation, Mice, Transgenic, Neuroprotection, MESH: Stroke, MESH: Brain, MESH: Mice, 129 Strain, medicine, Animals, MESH: Mice, Injections, Intraventricular, Advanced and Specialized Nursing, business.industry, Macrophages, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Time Factors, MESH: Macrophages, Recovery of Function, medicine.disease, MESH: Male, inflammation, Immunology, Neurology (clinical), business, Stem Cell Transplantation
Abstract

Background and Purpose— Until now, except thrombolysis, the therapeutical strategies targeting the acute phase of cerebral ischemia have been proven ineffective, and no approach is available to attenuate the delayed cell death mechanisms and the resulting functional deficits in the late phase. Then, we investigated whether a targeted and delayed delivery of pituitary adenylate cyclase–activating polypeptide (PACAP), a peptide known to exert neuroprotective activities, may dampen delayed pathophysiological processes improving functional recovery. Methods— Three days after permanent focal ischemia, PACAP-producing stem cells were transplanted intracerebro ventricularly in nonimmunosuppressed mice. At 7 and 14 days post ischemia, the effects of this stem cell–based targeted delivery of PACAP on functional recovery, volume lesions, and inflammatory processes were analyzed. Results— The delivery of PACAP in the vicinity of the infarct zone 3 days post stroke promotes fast, stable, and efficient functional recovery. This was correlated with a modulation of the postischemic inflammatory response. Transcriptomic and Ingenuity Pathway Analysis–based bioinformatic analyses identified several gene networks, functions, and key transcriptional factors, such as nuclear factor-κB, C/EBP-β, and Notch/RBP-J as PACAP’s potential targets. Such PACAP-dependent immunomodulation was further confirmed by morphometric and phenotypic analyses of microglial cells showing increased number of Arginase-1 + cells in mice treated with PACAP-expressing cells specifically, demonstrating the redirection of the microglial response toward a neuroprotective M2 phenotype. Conclusions— Our results demonstrated that immunomodulatory strategies capable of redirecting the microglial response toward a neuroprotective M2 phenotype in the late phase of brain ischemia could represent attractive options for stroke treatment in a new and unexploited therapeutical window.

Published
2015
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2. Biochemical Characterization of a Caspase-3 Far-red Fluorescent Probe for Non-invasive Optical Imaging of Neuronal Apoptosis

Author

Valérie Jolivel, Alain Fournier, Pierre-Yves Renard, Jérôme Leprince, Béatrice Botia, Heidi Ligeret, Omar Touzani, Hubert Vaudry, Bruno Delest, Anthony Romieu, David Vaudry, Marc Massonneau, Sébastien Arthaud, Pauline Noack, Christophe Portal, Guillaume Clavé, Différenciation et communication neuronale et neuroendocrine (DC2N), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institute for Research and Innovation in Biomedicine (IRIB), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), International Associated laboratory Samuel de Champlain, Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), QUantitative Imaging in Drug Development (QUIDD), QUantitative Imaging in Drug Development, Plate-Forme de Recherche en Imagerie Cellulaire de Haute-Normandie (PRIMACEN), Normandie Université (NU)-Normandie Université (NU)-Institute for Research and Innovation in Biomedicine (IRIB), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-High-tech Research Infrastructures for Life Sciences (HeRacLeS), Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Chimie Organique et Bioorganique : Réactivité et Analyse (COBRA), Institut de Chimie Organique Fine (IRCOF), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut Normand de Chimie Moléculaire Médicinale et Macromoléculaire (INC3M), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Hypoxie, physiopathologies cérébrovasculaire et tumorale (CERVOxy), Imagerie et Stratégies Thérapeutiques des pathologies Cérébrales et Tumorales (ISTCT), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Normand de Chimie Moléculaire Médicinale et Macromoléculaire (INC3M), Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie Organique Fine (IRCOF), and Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
medicine.medical_treatment, MESH: Neurons, Apoptosis, Proteomics, Imaging, Mice, [SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases, MESH: Caspase 3, MESH: Animals, Caspase, Cells, Cultured, Neurons, biology, Caspase 3, Optical Imaging, Brain, General Medicine, Carbocyanines, MESH: Fluorescent Dyes, 3. Good health, Cell biology, Stroke, Caspase-3, [SDV.TOX]Life Sciences [q-bio]/Toxicology, MESH: Oligopeptides, Pituitary Adenylate Cyclase-Activating Polypeptide, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], MESH: Carbocyanines, Oligopeptides, MESH: Cells, Cultured, Programmed cell death, MESH: Rats, MESH: Rhodamines, Cellular and Molecular Neuroscience, MESH: Brain, In vivo, MESH: Mice, Inbred C57BL, medicine, Animals, [CHIM]Chemical Sciences, Rats, Wistar, MESH: Mice, Fluorescent Dyes, MESH: Optical Imaging, Protease, Rhodamines, MESH: Apoptosis, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Rats, Wistar, Molecular biology, In vitro, Rats, Mice, Inbred C57BL, biology.protein, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology
Abstract

International audience; Apoptosis is a regulated process, leading to cell death, which is involved in several pathologies including neurodegenerative diseases and stroke. Caspase-3 is a key enzyme of the apoptotic pathway and is considered as a major target for the treatment of abnormal cell death. Sensitive and non-invasive methods to monitor caspase-3 activity in cells and in the brain of living animals are needed to test the efficiency of novel therapeutic strategies. In the present study, we have biochemically characterized a caspase-3 far-red fluorescent probe, QCASP3.2, that can be used to detect apoptosis in vivo. The specificity of cleavage of QCASP3.2 was demonstrated using recombinant caspases and protease inhibitors. The functionality of the probe was also established in cere-bellar neurons cultured in apoptotic conditions. QCASP3.2 did not exhibit any toxicity and appeared to accurately reflect the induction and inhibition of caspase activity by H 2 O 2 and PACAP, respectively, both in cell lysates and in cultured neurons. Finally, intravenous injection of the probe after cere-bral ischemia revealed activation of caspase-3 in the infarcted hemisphere. Thus, the present study demonstrates that QCASP3.2 is a suitable probe to monitor apoptosis both in vitro and in vivo and illustrates some of the possible applications of this caspase-3 fluorescent probe.

Published
2014
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3. Induction of serpinb1a by PACAP or NGF is required for PC12 cells survival after serum withdrawal

Author

Aurélia Ravni, Tommy Seaborn, Olivier Wurtz, Ruby Au, Hubert Vaudry, Lee E. Eiden, David Vaudry, Alain Fournier, Billy K. C. Chow, Différenciation et communication neuronale et neuroendocrine (DC2N), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), International Associated laboratory Samuel de Champlain, Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), Plate-Forme de Recherche en Imagerie Cellulaire de Haute-Normandie (PRIMACEN), Normandie Université (NU)-Normandie Université (NU)-Institute for Research and Innovation in Biomedicine (IRIB), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Armand Frappier (INRS-IAF), Réseau International des Instituts Pasteur (RIIP)-Institut National de la Recherche Scientifique [Québec] (INRS), National Institutes of Health [Bethesda] (NIH), This study was supported by INSERM (U982), the National Institute of Mental Health (NIMH) Intramural Research Program, an INSERM-FRSQ program (to A. F. and D. V.), the Interreg TC2N project, and the Région Haute-Normandie., Laflamme, Nancy, Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-High-tech Research Infrastructures for Life Sciences (HeRacLeS), Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), Institut Fédératif de Recherches Multidisciplinaires sur les Peptides (IFRMP 23), CHU Rouen, Normandie Université (NU)-Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-CRLCC Henri Becquerel-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Imager Lab, Columbia University [New York], Neuroendocrinologie cellulaire et moléculaire, Différenciation et communication neuronale et neuroendocrine ( DC2N ), Université de Rouen Normandie ( UNIROUEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Institut National de la Recherche Scientifique [Québec] ( INRS ) -Université de Rouen Normandie ( UNIROUEN ), Normandie Université ( NU ) -Normandie Université ( NU ), Department of Pediatrics, Hôpital St-François d'Assise, Centre de Recherche du Centre Hospitalier Universitaire de Québec ( CRCHUQ ), Plate-Forme de Recherche en Imagerie Cellulaire de Haute-Normandie ( PRIMACEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Institute for Research and Innovation in Biomedicine ( IRIB ), Normandie Université ( NU ) -Normandie Université ( NU ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Université de Rouen Normandie ( UNIROUEN ), Normandie Université ( NU ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Department de zoology, The University of Hong Kong ( HKU ), Institut Armand Frappier ( INRS-IAF ), Institut National de la Recherche Scientifique [Québec] ( INRS ) -Réseau International des Instituts Pasteur ( RIIP ) -Institut Armand Frappier, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, and This study was supported by INSERM (U982), the National Institute of Mental Health (NIMH) Intramural Research Program, an INSERM-FRSQprogram (to A. F. and D. V.), the Interreg TC2N project, and the Région Haute-Normandie.

Subjects
[SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Tropomyosin receptor kinase A, Biochemistry, [SDV.IMM.II]Life Sciences [q-bio]/Immunology/Innate immunity, PC12 Cells, Culture Media, Serum-Free, [CHIM] Chemical Sciences, MESH: Animals, Caspase, MESH: Nerve Growth Factor, biology, Kinase, MESH: Culture Media, Serum-Free, pituitary adenylate cyclase-activating polypeptide, 3. Good health, [SDV.TOX] Life Sciences [q-bio]/Toxicology, cell death, [SDV.IMM.IA]Life Sciences [q-bio]/Immunology/Adaptive immunology, MESH: Cell Survival, [SDV.SP.PHARMA] Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, [SDV.TOX]Life Sciences [q-bio]/Toxicology, neuroprotection, hormones, hormone substitutes, and hormone antagonists, Neurotrophin, medicine.medical_specialty, Programmed cell death, endocrine system, MESH: Rats, p38 mitogen-activated protein kinases, caspase, cell survival, Article, nerve growth factor, Cellular and Molecular Neuroscience, Internal medicine, MESH: Serpins, medicine, Animals, MESH: PC12 Cells, [CHIM]Chemical Sciences, Protein kinase A, Serpins, [ SDV ] Life Sciences [q-bio], [ SDV.BC ] Life Sciences [q-bio]/Cellular Biology, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, [ SDV.BC.BC ] Life Sciences [q-bio]/Cellular Biology/Subcellular Processes [q-bio.SC], Rats, Nerve growth factor, Endocrinology, nervous system, biology.protein, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology
Abstract

Thumbnail image of graphical abstract PC12 cells are used to study the signaling mechanisms underlying the neurotrophic and neuroprotective activities of pituitary adenylate cyclase-activating polypeptide (PACAP) and nerve growth factor (NGF). Previous microarray experiments indicated that serpinb1a was the most induced gene after 6 h of treatment with PACAP or NGF. This study confirmed that serpinb1a is strongly activated by PACAP and NGF in a time-dependent manner with a maximum induction (~ 50-fold over control) observed after 6 h of treatment. Co-incubation with PACAP and NGF resulted in a synergistic up-regulation of serpinb1a expression (200-fold over control), suggesting that PACAP and NGF act through complementary mechanisms. Consistently, PACAP-induced serpinb1a expression was not blocked by TrkA receptor inhibition. Nevertheless, the stimulation of serpinb1a expression by PACAP and NGF was significantly reduced in the presence of extracellular signal-regulated kinase, calcineurin, protein kinase A, p38, and PI3K inhibitors, indicating that the two trophic factors share some common pathways in the regulation of serpinb1a. Finally, functional investigations conducted with siRNA revealed that serpinb1a is not involved in the effects of PACAP and NGF on PC12 cell neuritogenesis, proliferation or body cell volume but mediates their ability to block caspases 3/7 activity and to promote PC12 cell survival. Pituitary adenylate cyclase-activating polypeptide (PACAP) and nerve growth factor (NGF) induce a strong increase in serpinb1 a expression in PC12 cells. Functional investigations revealed that this increase in serpinb1a does not affect cell proliferation or differentiation but inhibits caspase 3 activity and promotes cell survival., link_to_OA_fulltext

Published
2014
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4. Cortical-layer-specific effects of PACAP and tPA on interneuron migration during post-natal development of the cerebellum

Author

Emilie Raoult, Magalie Bénard, Hitoshi Komuro, Denis Vivien, Hubert Vaudry, Alain Fournier, David Vaudry, Alexis Lebon, Ludovic Galas, Laflamme, Nancy, Plate-Forme de Recherche en Imagerie Cellulaire de Haute-Normandie (PRIMACEN), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institute for Research and Innovation in Biomedicine (IRIB), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-High-tech Research Infrastructures for Life Sciences (HeRacLeS), Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Différenciation et communication neuronale et neuroendocrine (DC2N), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institute for Research and Innovation in Biomedicine (IRIB), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), International Associated laboratory Samuel de Champlain, Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), Cleveland Clinic, Sérine protéases et physiopathologie de l'unité neurovasculaire, Université de Caen Normandie (UNICAEN), Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), This work was supported by the Institute for Research and Innovation in Biomedicine (IRIB), the Cell Imaging Platform of Normandy (PRIMACEN), INSERM, the FEDER (# 2517), Interreg 4A TC2N European project, the LARC-Neurosciences Network, and the Region Haute-Normandie., Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Réseau International des Instituts Pasteur (RIIP)-Institut National de la Recherche Scientifique [Québec] (INRS)

Subjects
Male, Cerebellum, PACAP, Biochemistry, Tissue plasminogen activator, MESH: Plasminogen Activator Inhibitor 1, Interneuron migration, chemistry.chemical_compound, 0302 clinical medicine, Cell Movement, MESH: Tissue Plasminogen Activator, [CHIM] Chemical Sciences, MESH: Plasminogen, MESH: Animals, MESH: Cell Movement, 0303 health sciences, interneuron migration, Immunohistochemistry, MESH: Interneurons, Cell biology, [SDV.TOX] Life Sciences [q-bio]/Toxicology, medicine.anatomical_structure, Tissue Plasminogen Activator, Plasminogen activator inhibitor-1, [SDV.SP.PHARMA] Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, [SDV.TOX]Life Sciences [q-bio]/Toxicology, Pituitary Adenylate Cyclase-Activating Polypeptide, basket and stellate cells, Female, medicine.drug, Interneuron, Internal granular layer, cerebellum, MESH: Rats, MESH: Cytoplasmic Granules, Cytoplasmic Granules, Cerebellar Cortex, 03 medical and health sciences, Cellular and Molecular Neuroscience, Organ Culture Techniques, Interneurons, Plasminogen Activator Inhibitor 1, medicine, Animals, [CHIM]Chemical Sciences, tPA, Rats, Wistar, 030304 developmental biology, MESH: Cerebellar Cortex, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, granule neurons, Plasminogen, MESH: Immunohistochemistry, MESH: Rats, Wistar, MESH: Cerebellum, MESH: Male, MESH: Organ Culture Techniques, Rats, chemistry, nervous system, Hepatic stellate cell, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, Neuroscience, Plasminogen activator, MESH: Female, 030217 neurology & neurosurgery
Abstract

International audience; During early post-natal development of the cerebellum, granule neurons (GN) execute a centripetal migration toward the internal granular layer, whereas basket and stellate cells (B/SC) migrate centrifugally to reach their final position in the molecular layer (ML). We have previously shown that pituitary adenylate cyclase-activating polypeptide (PACAP) stimulates in vitro the expression and release of the serine protease tissue-type plasminogen activator (tPA) from GN, but the coordinated role of PACAP and tPA during interneuron migration has not yet been investigated. Here, we show that endogenous PACAP is responsible for the transient arrest phase of GN at the level of the Purkinje cell layer (PCL) but has no effect on B/SC. tPA is devoid of direct effect on GN motility in vitro, although it is widely distributed along interneuron migratory routes in the ML, PCL, and internal granular layer. Interestingly, plasminogen activator inhibitor 1 reduces the migration speed of GN in the ML and PCL, and that of B/SC in the ML. Taken together, these results reveal for the first time that tPA facilitates the migration of both GN and fast B/SC at the level of their intersection in the ML through degradation of the extracellular matrix. Crucial role of tissue plasminogen activator (tPA) in interneuron migration. Interneuron migration is a critical step for normal establishment of neuronal network. This study indicates that, in the post-natal cerebellum, tPA facilitates the opposite migration of immature excitatory granule neurons (GN) and immature inhibitory basket/stellate cells (B/SC) along the same migratory route. These data show that tPA exerts a pivotal role in neurodevelopment.

Published
2014
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5. The PACAP-regulated gene selenoprotein T is highly induced in nervous, endocrine, and metabolic tissues during ontogenetic and regenerative processes

Author

Destiny-Love Manecka, Jean Lesage, Youssef Anouar, Salah Elias, Loubna Boukhzar, Abdeslam Chagraoui, Sébastien Arthaud, Isabelle Lihrmann, Gaëtan Prévost, Isabelle Dorval-Coiffec, Bernard Jégou, Yannick Tanguy, Didier Vieau, Anthony Falluel-Morel, Différenciation et communication neuronale et neuroendocrine (DC2N), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Groupe d'Etude de la Reproduction Chez l'Homme et les Mammiferes (GERHM), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Unité Neurosciences et Physiologie Adaptative, Université de Lille, Sciences et Technologies, INSERM (U982), University of Rouen, the Conseil Régional de Haute-Normandie, Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Brébion, Alice

Subjects
Male, Pituitary gland, Cerebellum, Thyroid Gland, PC12 Cells, MESH: Selenoproteins, 0302 clinical medicine, Endocrinology, MESH: Pituitary Gland, Testis, MESH: Animals, Selenoproteins, chemistry.chemical_classification, [SDV.MHEP.EM] Life Sciences [q-bio]/Human health and pathology/Endocrinology and metabolism, 0303 health sciences, MESH: Testis, Thyroid, MESH: Regeneration, Brain, Selenoprotein T, [SDV.MHEP.EM]Life Sciences [q-bio]/Human health and pathology/Endocrinology and metabolism, 3. Good health, medicine.anatomical_structure, Liver, Pituitary Gland, Pituitary Adenylate Cyclase-Activating Polypeptide, medicine.medical_specialty, MESH: Rats, Neuropeptide, Biology, 03 medical and health sciences, MESH: Brain, Internal medicine, medicine, Endocrine system, Animals, Regeneration, MESH: PC12 Cells, Progenitor cell, Rats, Wistar, 030304 developmental biology, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Rats, Wistar, MESH: Male, Rats, MESH: Thyroid Gland, chemistry, Selenoprotein, 030217 neurology & neurosurgery, MESH: Liver
Abstract

International audience; Selenoproteins contain the essential trace element selenium whose deficiency leads to major disorders including cancer, male reproductive system failure, or autoimmune thyroid disease. Up to now, 25 selenoprotein-encoding genes were identified in mammals, but the spatiotemporal distribution, regulation, and function of some of these selenium-containing proteins remain poorly documented. Here, we found that selenoprotein T (SelT), a new thioredoxin-like protein, is regulated by the trophic neuropeptide pituitary adenylate cyclase-activating polypeptide (PACAP) in differentiating but not mature adrenomedullary cells. In fact, our analysis revealed that, in rat, SelT is highly expressed in most embryonic structures, and then its levels decreased progressively as these organs develop, to vanish in most adult tissues. In the brain, SelT was abundantly expressed in neural progenitors in various regions such as the cortex and cerebellum but was undetectable in adult nervous cells except rostral migratory-stream astrocytes and Bergmann cells. In contrast, SelT expression was maintained in several adult endocrine tissues such as pituitary, thyroid, or testis. In the pituitary gland, SelT was found in secretory cells of the anterior lobe, whereas in the testis, the selenoprotein was present only in spermatogenic and Leydig cells. Finally, we found that SelT expression is strongly stimulated in liver cells during the regenerative process that occurs after partial hepatectomy. Taken together, these data show that SelT induction is associated with ontogenesis, tissue maturation, and regenerative mechanisms, indicating that this PACAP-regulated selenoprotein may play a crucial role in cell growth and activity in nervous, endocrine, and metabolic tissues.

Published
2011
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6. Pituitary adenylate cyclase-activating polypeptide protects astroglial cells against oxidative stress-induced apoptosis

Author

Masmoudi-Kouki, Olfa, Douiri, Salma, Hamdi, Yosra, Kaddour, Hadhemi, Bahdoudi, Saima, Vaudry, David, Basille, Magali, Leprince, Jérôme, Fournier, Alain, Vaudry, Hubert, Tonon, Marie-Christine, Amri, Mohamed, Université de Tunis El Manar (UTM), Différenciation et communication neuronale et neuroendocrine (DC2N), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Fédératif de Recherches Multidisciplinaires sur les Peptides (IFRMP 23), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre de Lutte Contre le Cancer Henri Becquerel Normandie Rouen (CLCC Henri Becquerel)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-CHU Rouen, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Plate-Forme de Recherche en Imagerie Cellulaire de Haute-Normandie (PRIMACEN), Normandie Université (NU)-Normandie Université (NU)-Institute for Research and Innovation in Biomedicine (IRIB), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Armand Frappier (INRS-IAF), and Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP)

Subjects
MESH: Signal Transduction, endocrine system, MESH: Rats, MESH: Mitochondria, MESH: Drug Interactions, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, MESH: Neurons, Apoptosis, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, MESH: Animals, Newborn, Cerebellum, MESH: Caspase 3, [SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB], Animals, Drug Interactions, MESH: Animals, Rats, Wistar, Cells, Cultured, Cerebral Cortex, Neurons, MESH: Glutathione, MESH: Oxidative Stress, MESH: Culture Media, Conditioned, Caspase 3, MESH: Apoptosis, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Reactive Oxygen Species, Hydrogen Peroxide, MESH: Rats, Wistar, Glutathione, MESH: Cerebellum, MESH: Cerebral Cortex, Mitochondria, Rats, MESH: Astrocytes, Oxidative Stress, Animals, Newborn, Astrocytes, Culture Media, Conditioned, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Hydrogen Peroxide, Reactive Oxygen Species, hormones, hormone substitutes, and hormone antagonists, Signal Transduction, MESH: Cells, Cultured
Abstract

International audience; Oxidative stress, associated with a variety of disorders including neurodegenerative diseases, results from accumulation of reactive oxygen species (ROS). Oxidative stress is not only responsible for neuron apoptosis, but can also provoke astroglial cell death. Numerous studies indicate that pituitary adenylate cyclase-activating polypeptide (PACAP) promotes neuron survival, but nothing is known regarding the action of PACAP on astroglial cell survival. Thus, the purpose of the present study was to investigate the potential glioprotective effect of PACAP on H(2)O(2)-induced astrocyte death. Pre-treatment of cultured rat astrocytes with nanomolar concentrations of PACAP prevented cell death provoked by H(2)O(2) (300 μM), whereas vasoactive intestinal polypeptide was devoid of protective activity. The effect of PACAP on astroglial cell survival was abolished by the type 1 PACAP receptor antagonist, PACAP6-38. The protective action of PACAP was blocked by the protein kinase A inhibitor H89, the protein kinase C inhibitor chelerythrine and the mitogen-activated protein (MAP)-kinase kinase (MEK) inhibitor U0126. PACAP stimulated glutathione formation, and blocked H(2)O(2)-evoked ROS accumulation and glutathione content reduction. In addition, PACAP prevented the decrease of mitochondrial activity and caspase 3 activation induced by H(2)O(2). Taken together, these data indicate for the first time that PACAP, acting through type 1 PACAP receptor, exerts a potent protective effect against oxidative stress-induced astrocyte death. The anti-apoptotic activity of PACAP on astrocytes is mediated through the protein kinase A, protein kinase C and MAPK transduction pathways, and can be accounted for by inhibition of ROS-induced mitochondrial dysfunctions and caspase 3 activation.

Published
2011
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7. Neuroprotective effects of PACAP against ethanol-induced toxicity in the developing rat cerebellum

Author

Vadim Le Joncour, Alain Fournier, Magalie Bénard, Vincent Roy, Mickaël Naassila, Hubert Vaudry, Valérie Jolivel, Béatrice Botia, David Vaudry, Delphine Burel, Différenciation et communication neuronale et neuroendocrine ( DC2N ), Université de Rouen Normandie ( UNIROUEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Institut Fédératif de Recherches Multidisciplinaires sur les Peptides ( IFRMP 23 ), CHU Rouen-Université Le Havre Normandie ( ULH ), Normandie Université ( NU ) -Normandie Université ( NU ) -Université de Rouen Normandie ( UNIROUEN ), Normandie Université ( NU ) -CRLCC Henri Becquerel-Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ), International Associated laboratory Samuel de Champlain, Institut National de la Recherche Scientifique [Québec] ( INRS ) -Université de Rouen Normandie ( UNIROUEN ), Neuroendocrinologie cellulaire et moléculaire, Psychologie et Neurosciences de la Cognition et de l'affectivité ( PSY-NCA ), Normandie Université ( NU ) -Normandie Université ( NU ), Alcoolisation précoce et vulnerabilité à la dépendance, Université de Picardie Jules Verne ( UPJV ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Institut Armand Frappier ( INRS-IAF ), Institut National de la Recherche Scientifique [Québec] ( INRS ) -Réseau International des Instituts Pasteur ( RIIP ) -Institut Armand Frappier, Naassila, Mickael, Différenciation et communication neuronale et neuroendocrine (DC2N), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Fédératif de Recherches Multidisciplinaires sur les Peptides (IFRMP 23), CHU Rouen, Normandie Université (NU)-Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre de Lutte Contre le Cancer Henri Becquerel Normandie Rouen (CLCC Henri Becquerel)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), Psychologie et Neurosciences de la Cognition et de l'affectivité (PSY-NCA), Normandie Université (NU)-Normandie Université (NU), Groupe de Recherche sur l'alcool et les pharmacodépendances - UMR INSERM_S 1247 (GRAP), Université de Picardie Jules Verne (UPJV)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre de Lutte Contre le Cancer Henri Becquerel Normandie Rouen (CLCC Henri Becquerel)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-CHU Rouen, and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Cerebellum, MESH : Cerebellum, Cellular differentiation, Toxicology, MESH : Ethanol, MESH: Animals, Newborn, 0302 clinical medicine, MESH : Neuroprotective Agents, MESH: Animals, 0303 health sciences, MESH : Rats, General Neuroscience, MESH : Animals, Newborn, Neurogenesis, MESH: Neuroprotective Agents, MESH: Motor Activity, MESH : Pituitary Adenylate Cyclase-Activating Polypeptide, medicine.anatomical_structure, Neuroprotective Agents, Toxicity, Pituitary Adenylate Cyclase-Activating Polypeptide, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], hormones, hormone substitutes, and hormone antagonists, medicine.medical_specialty, Programmed cell death, endocrine system, MESH: Ethanol, MESH: Rats, Neuropeptide, Biology, Motor Activity, MESH : Rats, Wistar, Neuroprotection, 03 medical and health sciences, Internal medicine, medicine, Animals, [SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Rats, Wistar, 030304 developmental biology, Ethanol, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Rats, Wistar, Granule cell, MESH: Cerebellum, Rats, Endocrinology, Animals, Newborn, [ SDV.NEU ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], MESH : Animals, MESH : Motor Activity, 030217 neurology & neurosurgery
Abstract

International audience; The developing rat cerebellum is particularly sensitive to alcohol at the end of the first postnatal week, a period of intense neurogenesis. The neuropeptide Pituitary adenylate cyclase-activating polypeptide (PACAP) has previously been shown to prevent the death of cultured neurons in vitro. We have thus investigated the capacity of PACAP to counteract ethanol toxicity in 8-day-old rats. Behavioral studies revealed that PACAP reduces the deleterious action of alcohol in the negative geotaxis test. Administration of ethanol induced a transient increase of the expression of pro-apoptotic genes including c-jun or caspase-3 , which could be partially blocked by PACAP. Alcohol inhibited the expression of the α6 GABA ( A ) subunit while PACAP increased neuroD2 mRNA level, two markers of neuronal differentiation. Although gene regulations occurred rapidly, a third injection of ethanol was required to strongly reduce the number of granule cells in the internal granule cell layer, an effect which was totally blocked by PACAP. The action of PACAP was mimicked by D-JNKi1 and Z-VAD-FMK, indicating the involvement of the jun and caspase-3 pathways in alcohol toxicity. The present data demonstrate that PACAP can counteract in vivo the deleterious effect of ethanol. The beneficial action of PACAP on locomotor activity precedes its activity on cell survival, indicating that PACAP can block the detrimental action of ethanol on cell differentiation.

Published
2011
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8. Molecular and conformational determinants of pituitary adenylate cyclase-activating polypeptide (PACAP) for activation of the PAC1 receptor

Author

David Vaudry, Steve Bourgault, Marc Laburthe, Isabelle Ségalas-Milazzo, Alain Couvineau, Laure Guilhaudis, Alain Fournier, Hubert Vaudry, Neuroendocrinologie cellulaire et moléculaire, Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Fédératif de Recherches Multidisciplinaires sur les Peptides (IFRMP 23), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre de Lutte Contre le Cancer Henri Becquerel Normandie Rouen (CLCC Henri Becquerel)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-CHU Rouen, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), International Associated laboratory Samuel de Champlain, Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU), Chimie Organique et Bioorganique : Réactivité et Analyse (COBRA), Institut Normand de Chimie Moléculaire Médicinale et Macromoléculaire (INC3M), Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie Organique Fine (IRCOF), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Equipe de Chimie Organique et Biologie Structurale (ECOBS), Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU), Centre de recherche biomédicale Bichat-Beaujon (CRB3), Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM), and This work was supported by the Institut National de la Recherche Scientifique, the Institut National de la Santé et de la Recherche Médicale (INSERM U413), the Conseil Régional de Haute-Normandie, the IREB, the IRME, the ANR, and a scientific exchange program from INSERM and the Fonds de la Recherche en Sante' du Que'bec (FRSQ). Parts of these studies were performed with the support of the Platform for Cell Imaging of Haute-Normandie (PRIMACEN). NMR and molecular modeling software facilities were provided by the Centre de Ressources Informatiques de Haute-Normandie

Subjects
Agonist, Magnetic Resonance Spectroscopy, MESH: Amino Acids, Protein Conformation, medicine.drug_class, Adenylate kinase, MESH: Cricetinae, CHO Cells, Cyclase, Turn (biochemistry), Structure-Activity Relationship, 03 medical and health sciences, chemistry.chemical_compound, Cricetulus, 0302 clinical medicine, MESH: Structure-Activity Relationship, MESH: Protein Conformation, MESH: Cricetulus, MESH: CHO Cells, Cricetinae, Drug Discovery, Peptide synthesis, medicine, Animals, MESH: Protein Binding, MESH: Animals, Amino Acids, 030304 developmental biology, G protein-coupled receptor, 0303 health sciences, MESH: Magnetic Resonance Spectroscopy, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, Pituitary adenylate cyclase-activating peptide, chemistry, Biochemistry, [SDV.TOX]Life Sciences [q-bio]/Toxicology, MESH: Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Type I, Pituitary Adenylate Cyclase-Activating Polypeptide, Molecular Medicine, Pharmacophore, 030217 neurology & neurosurgery, Protein Binding, Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Type I
Abstract

International audience; PAC1 receptor is abundant in the CNS and plays an important role in neuronal survival. To identify the molecular determinants and the conformational components responsible for the activation of the PAC1 receptor, we performed a SAR study focusing on the N-terminal domain of its endogenous ligand, PACAP. This approach revealed that residues Asp(3) and Phe(6) are key elements of the pharmacophore of the PAC1 receptor. This study, supported by NMR structural analyses, suggests that the N-terminal tail of PACAP (residues 1 to 4) adopts a specific conformation similar to a turn when it activates the PAC1 receptor. Moreover, the integrity of the alpha-helix conformation observed at positions 5 to 7 appears crucial to allow the binding of PACAP. Characterization of analogues led to the identification of several superagonists, such as [Bip(6)]PACAP27, and of a new potent PAC1 receptor antagonist, [Sar(4)]PACAP38. The bioactive conformation inferred from this SAR study could constitute an appropriate molecular scaffold supporting the design of nonpeptidic PAC1 receptor agonists.

Published
2009
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9. Distribution and functional characterization of pituitary adenylate cyclase-activating polypeptide receptors in the brain of non-human primates

Author

Nicolas Aubert, Marc Massonneau, M. Basille, J. F. Le Bigot, Alain Fournier, S. de Jouffrey, David Vaudry, Hubert Vaudry, Pauline Noack, Valérie Jolivel, Philippe Ancian, Bruno J. Gonzalez, Neuroendocrinologie cellulaire et moléculaire, Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Quantitative Imaging in Drug Development (QUIDD), QUantitative Imaging in Drug Development, International Associated laboratory Samuel de Champlain, Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU), Centre International de Toxicologie (CIT), Centre International de Toxicologie, Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), Ce travail a été financé par l'Institut National de la Santé et de la Recherche Médicale (INSERM U-413), the Institut pour la Recherche sur la Moelle épinière et l'Encéphale (IRME), the Institut de Recherches Scientifiques sur les Boissons (IREB, and 2007/29), the Institut National de la Santé et de la Recherche Médicale and Fondation de la Recherche en Santé du Québec (INSERM/FRSQ

Subjects
Male, Vasoactive intestinal peptide, MESH: Callithrix, Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, 0302 clinical medicine, Tissue Distribution, MESH: Animals, Receptor, MESH: Brain Mapping, Brain Mapping, 0303 health sciences, General Neuroscience, Brain, Marmoset, Callithrix, Cell biology, Pituitary adenylate cyclase-activating peptide, medicine.anatomical_structure, Cerebral cortex, Hypothalamus, [SDV.TOX]Life Sciences [q-bio]/Toxicology, MESH: Habenula, Pituitary Adenylate Cyclase-Activating Polypeptide, Female, medicine.medical_specialty, Adenylate kinase, In situ hybridization, Biology, 03 medical and health sciences, MESH: Brain, Species Specificity, Internal medicine, biology.animal, medicine, Animals, MESH: Species Specificity, RNA, Messenger, MESH: Tissue Distribution, 030304 developmental biology, MESH: RNA, Messenger, Habenula, MESH: Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Septum of Brain, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Hypothalamus, MESH: Male, Macaca fascicularis, Endocrinology, MESH: Macaca fascicularis, Septum of Brain, MESH: Female, 030217 neurology & neurosurgery
Abstract

International audience; The distribution and density of pituitary adenylate cyclase-activating polypeptide (PACAP) binding sites have been investigated in the brain of the primates Jacchus callithrix (marmoset) and Macaca fascicularis (macaque) using [(125)I]-PACAP27 as a radioligand. PACAP binding sites were widely expressed in the brain of these two species with particularly high densities in the septum, hypothalamus and habenula. A moderate density of recognition sites was seen in all subdivisions of the cerebral cortex with a heterogenous distribution, the highest concentrations occurring in layers I and VI while the underlying white matter was almost devoid of binding sites. Reverse transcriptase-polymerase chain reaction (RT-PCR) analysis revealed intense expression of the mRNAs encoding the short and hop-1 variants of pituitary adenylate cyclase-activating polypeptide-specific receptor (PAC1-R) in the cortex of both marmoset and macaque, whereas vasoactive intestinal polypeptide/pituitary adenylate cyclase-activating polypeptide mutual receptor, subtype 1 (VPAC1-R) and vasoactive intestinal polypeptide/pituitary adenylate cyclase-activating polypeptide mutual receptor, subtype 2 (VPAC2-R) mRNAs were expressed at a much lower level. In situ hybridization histochemistry showed intense expression of PAC1-R and weak expression of VPAC1-R mRNAs in layer IV of the cerebral cortex. Incubation of cortical tissue slices with PACAP induced a dose-dependent stimulation of cyclic AMP formation, indicating that PACAP binding sites correspond to functional receptors. Moreover, treatment of primate cortical slices with 100 nM PACAP significantly reduced the activity of caspase-3, a key enzyme of the apoptotic cascade. The present results indicate that PACAP should exert the same neuroprotective effect in the brain of primates as in rodents and suggest that PAC1-R agonists may have a therapeutic value to prevent neuronal cell death after stroke or in specific neurodegenerative diseases.

Published
2009
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10. Role of PACAP and VIP in astroglial functions

Author

Jérôme Leprince, Alain Fournier, Pierrick Gandolfo, Hélène Castel, Marie-Christine Tonon, Agnieszka Dejda, Olfa Masmoudi-Kouki, Hubert Vaudry, Neuroendocrinologie cellulaire et moléculaire, Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Fédératif de Recherches Multidisciplinaires sur les Peptides (IFRMP 23), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre de Lutte Contre le Cancer Henri Becquerel Normandie Rouen (CLCC Henri Becquerel)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-CHU Rouen, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Faculté des Sciences Mathématiques, Physiques et Naturelles de Tunis (FST), Université de Tunis El Manar (UTM), International Associated laboratory Samuel de Champlain, Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), and Polish Academy of Sciences (PAN)

Subjects
Physiology, MESH: Receptors, Vasoactive Intestinal Peptide, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Vasoactive intestinal peptide, MESH: Glycogen, Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Neuropeptide, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, Biology, Biochemistry, Neuroprotection, Models, Biological, 03 medical and health sciences, Cellular and Molecular Neuroscience, 0302 clinical medicine, Endocrinology, Neurotrophic factors, MESH: Cell Proliferation, [SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB], medicine, Animals, Humans, MESH: Animals, 030304 developmental biology, Cell Proliferation, 0303 health sciences, MESH: Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Humans, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Vasoactive Intestinal Peptide, MESH: Models, Biological, MESH: Astrocytes, Pituitary adenylate cyclase-activating peptide, medicine.anatomical_structure, Astrocytes, Synaptic plasticity, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, Neuroglia, Pituitary Adenylate Cyclase-Activating Polypeptide, Receptors, Vasoactive Intestinal Peptide, Neuroscience, 030217 neurology & neurosurgery, Glycogen, hormones, hormone substitutes, and hormone antagonists, Astrocyte, Vasoactive Intestinal Peptide
Abstract

International audience; Astrocytes represent at least 50% of the volume of the human brain. Besides their roles in various supportive functions, astrocytes are involved in the regulation of stem cell proliferation, synaptic plasticity and neuroprotection. Astrocytes also influence neuronal physiology by responding to neurotransmitters and neuropeptides and by releasing regulatory factors termed gliotransmitters. In particular, astrocytes express the PACAP-specific receptor PAC1-R and the PACAP/VIP mutual receptors VPAC1-R and VPAC2-R during development and/or in the adult. There is now clear evidence that PACAP and VIP modulate a number of astrocyte activities such as proliferation, plasticity, glycogen production, and biosynthesis of neurotrophic factors and gliotransmitters.

Published
2007
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11. VIP and PACAP stimulate TSH release from the bullfrog pituitary

Author

Alain Fournier, Kazutoshi Yamamoto, Sakae Kikuyama, Reiko Okada, Marie Christine Tonon, Jérôme Leprince, Hubert Vaudry, Hiroshi Mochida, Yoichi Ito, Waseda University, Saitama University, University of Shizuoka, Neuroendocrinologie cellulaire et moléculaire, Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), International Associated laboratory Samuel de Champlain, Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Recherche Scientifique [Québec] (INRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU), Institut Armand Frappier (INRS-IAF), and Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP)

Subjects
Pituitary gland, Physiology, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Vasoactive intestinal peptide, Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Thyrotropin, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, PACAP, Biochemistry, MESH: Dose-Response Relationship, Drug, 0302 clinical medicine, Endocrinology, Thyrotropic cell, Bullfrog, MESH: Pituitary Gland, [SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB], MESH: Animals, Cells, Cultured, 0303 health sciences, Rana catesbeiana, Chemistry, MESH: Vasoactive Intestinal Peptide, PAC1-receptor, Pituitary adenylate cyclase-activating peptide, medicine.anatomical_structure, Pituitary Gland, MESH: Thyrotropin, Pituitary Adenylate Cyclase-Activating Polypeptide, Frog TSH, hormones, hormone substitutes, and hormone antagonists, Endocrine gland, Vasoactive Intestinal Peptide, MESH: Cells, Cultured, medicine.medical_specialty, endocrine system, 03 medical and health sciences, Cellular and Molecular Neuroscience, Thyroid-stimulating hormone, Internal medicine, medicine, Animals, 030304 developmental biology, MESH: Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Dose-Response Relationship, Drug, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, Antagonist, MESH: Rana catesbeiana, VIP, VPAC2-receptor, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, 030217 neurology & neurosurgery
Abstract

International audience; We have recently shown that corticotropin-releasing hormone (CRH) is a major thyrotropin (TSH)-releasing factor in amphibians, but we have also found that, besides CRH, other hypothalamic substances stimulate TSH secretion in frog. In order to characterize novel TSH secretagogues, we have investigated the effect of frog (Rana ridibunda) vasoactive intestinal polypeptide (VIP) (fVIP) and pituitary adenylate cyclase-activating polypeptide (PACAP) (fPACAP38 and PACAP27) on TSH release from bullfrog (Rana catesbeiana) pituitary cells in primary culture. Incubation of pituitary cells for 24h with graded concentrations of fVIP, fPACAP38 and PACAP27 (10(-9) to 10(-6)M) induced a dose-dependent stimulation of TSH release with minimum effective doses of 10(-9)M for fVIP and 10(-8)M for fPACAP38 and PACAP27. The PAC1-R/VPAC2-R antagonist PACAP(6-38) (10(-7) and 10(-6)M) dose-dependently suppressed the stimulatory effects of fVIP and fPACAP38 (10(-7)M each). Likewise, this antagonist (10(-6) and 10(-5)M) dose-dependently attenuated the stimulatory effect of PACAP27 (10(-7)M). On the other hand, the VPAC1-R/VPAC2-R antagonist [d-pCl-Phe(6), Leu(17)]VIP (10(-6) and 10(-5)M) dose-dependently inhibited the stimulatory effect of fVIP (10(-9)M) and PACAP27 (10(-8)M), but did not affect the response to fPACAP38 (10(-8)M). These data indicate that, in amphibians, the activity of thyrotrophs can be regulated by VIP and PACAP acting likely through VPAC2-R and PAC1-R.

Published
2007
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12. PACAP and C2-ceramide generate different AP-1 complexes through a MAP-kinase-dependent pathway: involvement of c-Fos in PACAP-induced Bcl-2 expression

Author

Cecile Fisch, Xavier Xifró, Jean‐François Lebigot, Nicolas Aubert, Bruno J. Gonzalez, Alain Fournier, Hubert Vaudry, Stephane De Jouffrey, José Rodríguez-Alvarez, David Vaudry, Anthony Falluel-Morel, Neuroendocrinologie cellulaire et moléculaire, Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), CIT (CIT), CIT, Laboratory of Biochemistry and Molecular Biology, Neuroscience Institute-Autonomous University of Barcelona, Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), and This work was supported by INSERM (U413), the CIT, a France-Quebec exchange program (INSERM-FRSQ), the Regional Platform for Cell Imaging, and the Conseil Régional de Haute-Normandie

Subjects
Proto-Oncogene Proteins c-jun, MESH: Neurons, Apoptosis, Biochemistry, c-Fos, MESH: Animals, Newborn, MESH: Down-Regulation, MESH: Dose-Response Relationship, Drug, 0302 clinical medicine, Sphingosine, Gene expression, Phosphoprotein Phosphatases, MESH: Animals, Protein Phosphatase 2, Enzyme Inhibitors, Phosphorylation, Cells, Cultured, Neurons, 0303 health sciences, Kinase, MESH: Proto-Oncogene Proteins c-fos, MESH: Protein Phosphatase 2, MESH: Gene Expression Regulation, MESH: Transcription Factor AP-1, 3. Good health, DNA-Binding Proteins, Proto-Oncogene Proteins c-bcl-2, MESH: Cell Survival, MESH: Enzyme Inhibitors, Mitogen-activated protein kinase, [SDV.TOX]Life Sciences [q-bio]/Toxicology, Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Sphingosine, Proto-Oncogene Proteins c-fos, hormones, hormone substitutes, and hormone antagonists, MESH: Cells, Cultured, Transcriptional Activation, endocrine system, MESH: Rats, Cell Survival, MAP Kinase Signaling System, Down-Regulation, Adenylate kinase, Biology, Cerebellar Cortex, 03 medical and health sciences, Cellular and Molecular Neuroscience, MESH: Phosphoprotein Phosphatases, Animals, Rats, Wistar, Protein kinase A, 030304 developmental biology, MESH: Cerebellar Cortex, Dose-Response Relationship, Drug, MESH: Phosphorylation, MESH: Proto-Oncogene Proteins c-jun, MESH: MAP Kinase Signaling System, MESH: Apoptosis, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, Protein phosphatase 2, MESH: Rats, Wistar, Molecular biology, Rats, Transcription Factor AP-1, Animals, Newborn, Gene Expression Regulation, MESH: Proto-Oncogene Proteins c-bcl-2, biology.protein, MESH: Transcriptional Activation, 030217 neurology & neurosurgery, MESH: DNA-Binding Proteins
Abstract

International audience; The neuropeptide pituitary adenylate cyclase-activating polypeptide (PACAP) inhibits C2-ceramide-induced cell death through blockade of the mitochondrial apoptotic pathway in rat cerebellar granule neurones. However, the gene induction processes and transcription factors involved in the anti-apoptotic effect of PACAP remain unknown. Here, we show that PACAP and C2-ceramide activate activator protein-1 (AP-1) DNA binding in a dose- and time-dependent manner, but generate different AP-1 dimers. Thus, PACAP increased the proportion of c-Fos and Jun D while C2-ceramide increased c-Jun and reduced c-Fos in AP-1 complexes. In addition, PACAP strongly activated c-Fos gene expression while C2-ceramide markedly increased c-Jun phosphorylation. The effect of PACAP on c-Fos expression was blocked by the mitogen-activated protein kinase/extracellular signal-regulated kinase (MEK) inhibitor, U0126, while phosphorylation of c-Jun induced by C2-ceramide was abrogated by the protein phosphatase 2A (PP2A) inhibitor, okadaic acid. Transfection of immature granule cells with c-Fos siRNA, which strongly reduced basal and PACAP-stimulated levels of the protein, totally prevented the stimulatory effect of PACAP on Bcl-2 expression. The present study demonstrates that AP-1 complexes containing c-Fos mediate the effect of PACAP on Bcl-2 gene expression in cerebellar granule neurones. Our data also indicate that different AP-1 dimers are associated with the pro-apoptotic effect of C2-ceramide and the anti-apoptotic effect of PACAP.

Published
2006
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13. Identification of Proteins Regulated by PACAP in PC12 Cells by 2D Gel Electrophoresis Coupled to Mass Spectrometry

Author

Jérôme Leprince, Alexis Lebon, Laurent Coquet, Thierry Jouenne, Alain Fournier, Damien Seyer, Bruno J. Gonzalez, Pascal Cosette, David Vaudry, Hubert Vaudry, Philippe Chan, Plate-Forme de Recherche en Imagerie Cellulaire de Haute-Normandie (PRIMACEN), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institute for Research and Innovation in Biomedicine (IRIB), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Equipe de recherche sur les relations matrice extracellulaire-cellules (ERRMECe), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Polymères Biopolymères Surfaces (PBS), Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Institut Normand de Chimie Moléculaire Médicinale et Macromoléculaire (INC3M), Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Polymères, biopolymères, membranes (PBM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Neuroendocrinologie cellulaire et moléculaire, Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Différenciation et communication neuronale et neuroendocrine (DC2N), Montreal Heart Institute (MONTREAL HEART INSTITUTE), Endothélium microcirculatoire cérébral et lésions du système nerveux central au cours du développement (Néovasc), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Neurite, MESH: Rats, Protein subunit, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Protein Array Analysis, PC12 cell line, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, Proteomics, PC12 Cells, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, History and Philosophy of Science, Hsp27, [SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB], Animals, MESH: PC12 Cells, Electrophoresis, Gel, Two-Dimensional, MESH: Animals, MESH: Proteins, 030304 developmental biology, Gel electrophoresis, 0303 health sciences, Two-dimensional gel electrophoresis, biology, MESH: Protein Array Analysis, General Neuroscience, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, Proteins, MESH: Electrophoresis, Gel, Two-Dimensional, Molecular biology, Rats, Cell biology, Tubulin, chemistry, MESH: Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, biology.protein, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, Pituitary Adenylate Cyclase-Activating Polypeptide, 030217 neurology & neurosurgery
Abstract

International audience; The rat pheochromocytoma PC12 cell line has been widely used as a model to study neuronal differentiation. In particular, after serum depletion, PC12 cells stop to proliferate and undergo apoptosis. Under such conditions, treatment with pituitary adenylate cyclase-activating polypeptide (PACAP) promotes cell survival and induces neurite outgrowth. The identification of the proteins regulated by PACAP in PC12 cells under apoptotic conditions should provide valuable information concerning the mechanisms controlling neuronal cell survival and differentiation. To this aim, PC12 cells cultured in serum-free medium were treated with PACAP (10(-7) M), proteins were extracted, separated by two-dimensional gel electrophoresis (2-DE), and identified by MALDI-ToF mass spectrometry. The comparison between 16 2-DE maps led to the characterization of 110 proteins regulated by PACAP among which 22 have been identified by automatic query of the Mascot, Aldente, and Profound servers with the ProGeR-CDD database. Seventy-six percent of these proteins, including the p17 subunit of caspase-3, the heat shock protein hsp60, and the GTPase ran were found to be repressed whereas the others notably hsp27, tubulin beta-5, and calmodulin were overexpressed. Investigation of the putative functions indicated that some of the proteins regulated by PACAP and identified in the present article could control cell survival or differentiation.

Published
2006
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14. Effects of pituitary adenylate cyclase-activating polypeptide, vasoactive intestinal polypeptide, and somatostatin on the release of thyrotropin from the bullfrog pituitary

Author

Sakae Kikuyama, Jérôme Leprince, Hubert Vaudry, Kazutoshi Yamamoto, Reiko Okada, Yoichi Ito, Alain Fournier, Nicolas Chartrel, Department of Biology, School of Education, Waseda University, Institut Fédératif de Recherches Multidisciplinaires sur les Peptides (IFRMP 23), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre de Lutte Contre le Cancer Henri Becquerel Normandie Rouen (CLCC Henri Becquerel)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-CHU Rouen, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), and This work was supported by Inamori Foundation (H17) JSPS (16370031, 15207007), Waseda University (2004B-839, 2003C-009), INSERM (U413), the European Institute for Peptide Research (IFRMP 23), and the Conseil Régional de Haute-Normandie.

Subjects
medicine.medical_specialty, endocrine system, endocrine system diseases, MESH: Somatostatin, Vasoactive intestinal peptide, Thyrotropin, Adenylate kinase, Neuropeptide, 030209 endocrinology & metabolism, Stimulation, somatostatin, PACAP, amphibia, General Biochemistry, Genetics and Molecular Biology, Cortistatin (neuropeptide), 03 medical and health sciences, 0302 clinical medicine, History and Philosophy of Science, Bullfrog, MESH: Pituitary Gland, Internal medicine, medicine, Animals, MESH: Animals, Cells, Cultured, 030304 developmental biology, 0303 health sciences, Rana catesbeiana, Chemistry, TSH, General Neuroscience, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, MESH: Vasoactive Intestinal Peptide, 3. Good health, MESH: Rana catesbeiana, VIP, Endocrinology, Somatostatin, Pituitary Gland, MESH: Thyrotropin, [SDV.TOX]Life Sciences [q-bio]/Toxicology, Pituitary Adenylate Cyclase-Activating Polypeptide, hormones, hormone substitutes, and hormone antagonists, Vasoactive Intestinal Peptide, Hormone, MESH: Cells, Cultured
Abstract

The recent development of a specific radioimmunoassay for amphibian (bullfrog, Rana catesbeiana) thyrotropin (TSH) has made it possible to study the effects of various neuropeptides on the release of TSH from the pituitary in vitro. Up to now, corticotropin-releasing factor of bullfrog origin has been shown to have a potent TSH-releasing activity, whereas gonadotropin-releasing hormone and TSH-releasing hormone exhibit a moderate TSH-releasing effect on the adult, but not larval, pituitary. In the present study, the effects of pituitary adenylate cyclase-activating polypeptide (PACAP), vasoactive intestinal polypeptide (VIP), and somatostatin (SS) on the in vitro release of TSH from the bullfrog pituitary were investigated. Both frog (R. ridibunda) PACAP-38 and PACAP-27 caused a concentration-dependent stimulation of the release of TSH from dispersed pituitary cells during a 24-h culture. The PACAP-38- and PACAP-27-induced TSH release was suppressed by a simultaneous application of PACAP6-38. Application of high concentrations of PACAP6-38 alone caused a slight but significant stimulatory effect on the release of TSH. Frog VIP also stimulated TSH release from pituitary cells concentration-dependently. Frog SS1 (homologous to mammalian somatostatin-14) and SS2 (homologous to mammalian cortistatin) did not affect the basal release of TSH but caused a concentration-dependent suppression of the PACAP-38-induced release of TSH. These results suggest the involvement of multiple neuropeptides in the regulation of the release of TSH from the amphibian pituitary.

Published
2006
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15. Pituitary adenylate cyclase-activating polypeptide (PACAP) stimulates endozepine release from cultured rat astrocytes via a PKA-dependent mechanism

Author

Christine Patte-Mensah, Pierrick Gandolfo, Hubert Vaudry, Olfa Masmoudi, Marie-Christine Tonon, Jérôme Leprince, David Vaudry, Alain Fournier, Neuroendocrinologie cellulaire et moléculaire, Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Fédératif de Recherches Multidisciplinaires sur les Peptides (IFRMP 23), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre de Lutte Contre le Cancer Henri Becquerel Normandie Rouen (CLCC Henri Becquerel)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-CHU Rouen, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Institut Armand Frappier (INRS-IAF), and Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP)

Subjects
MESH: Signal Transduction, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, MESH: Neuropeptides, Biochemistry, MESH: Dose-Response Relationship, Drug, chemistry.chemical_compound, 0302 clinical medicine, Phosphatidylinositol Phosphates, [SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB], Cyclic AMP, MESH: Animals, MESH: Peptide Fragments, Cells, Cultured, MESH: Cyclic AMP, Diazepam Binding Inhibitor, 0303 health sciences, MESH: Kinetics, hemic and immune systems, respiratory system, MESH: Phosphatidylinositol Phosphates, 3. Good health, MESH: Calcium, Pituitary Adenylate Cyclase-Activating Polypeptide, hormones, hormone substitutes, and hormone antagonists, Signal Transduction, Biotechnology, MESH: Cells, Cultured, medicine.medical_specialty, endocrine system, Endozepine, MESH: Rats, Neuropeptide, Adenylate kinase, MESH: Cyclic AMP-Dependent Protein Kinases, Biology, Cyclase, 03 medical and health sciences, Internal medicine, Genetics, medicine, Animals, Secretion, Molecular Biology, Protein kinase C, 030304 developmental biology, Dose-Response Relationship, Drug, Neuropeptides, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, Antagonist, Cyclic AMP-Dependent Protein Kinases, Peptide Fragments, Rats, MESH: Astrocytes, Kinetics, Endocrinology, Chelerythrine, chemistry, Astrocytes, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, MESH: Diazepam Binding Inhibitor, Calcium, 030217 neurology & neurosurgery
Abstract

International audience; Astroglial cells synthesize and release endozepines, neuropeptides that are related to the octadecaneuropeptide ODN. Glial cells also express PACAP/VIP receptors. We have investigated the possible effect of PACAP on the release of ODN-like immunoreactivity (ODN-LI) by cultured rat astrocytes. Administration of PACAP27 and PACAP38 induced a concentration-dependent increase in secretion of ODN-LI whereas VIP was approximately 1000-fold less potent. The maximum effect of PACAP38 occurred after 5 min, then gradually declined during the next 10 min. The stimulatory effects of PACAP and VIP were abrogated by the PACAP antagonist PACAP6-38. PACAP38 stimulated cAMP formation, activated polyphosphoinositide turnover, and provoked calcium mobilization from IP3-sensitive pools. The PKA inhibitor H89 suppressed PACAP-induced secretion of ODN-LI, whereas PLC inhibitor U73122 and the PKC inhibitor chelerythrine had no effect. In contrast, U73122 restored the stimulatory action of PACAP on ODN-LI release and cAMP formation during prolonged (15 min) incubation with the peptide, and this effect was prevented by PMA. The present results demonstrate that PACAP stimulates endozepine release through activation of PAC1 receptors coupled to the AC/PKA pathway. Our data also show that activation of the PLC/PKC pathway down-regulates the effect of PACAP on endozepine release.

Published
2003
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16. Pituitary growth hormone secretion in the turbot, a phylogenetically recent teleost, is regulated by a species-specific pattern of neuropeptides

Author

Nadine Le Belle, Gilles Boeuf, Billy K. C. Chow, J. Marchelidon, Karine Rousseau, Sylvie Dufour, Karine Pichavant, Biologie des organismes marins et écosystèmes (BOME), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN), Optimisation des régulations physiologiques (ORPHY (EA 4324)), Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO)-Université de Brest (UBO)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest), Littoral, Environnement, Télédétection, Géomatique (LETG - Rennes), Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN), Université de Nantes (UN)-Université de Nantes (UN)-Université de Caen Normandie (UNICAEN), Université de Nantes (UN)-Université de Nantes (UN), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Université de Brest (UBO)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest)-Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO), Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN), and Guerrero, François

Subjects
MESH: Signal Transduction, MESH: Eels, [SDV.MHEP.PHY] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Endocrinology, Diabetes and Metabolism, MESH: Somatostatin, MESH: Neuropeptides, Culture Media, Serum-Free, MESH: Drug Synergism, MESH: Dose-Response Relationship, Drug, chemistry.chemical_compound, 0302 clinical medicine, Endocrinology, MESH: Pituitary Gland, MESH: Animals, Cells, Cultured, 0303 health sciences, Eels, Forskolin, MESH: Pituitary Gland, Anterior, Drug Synergism, Growth hormone–releasing hormone, MESH: Culture Media, Serum-Free, MESH: Flatfishes, Somatostatin, Pituitary Gland, Flatfishes, Pituitary Adenylate Cyclase-Activating Polypeptide, Tetradecanoylphorbol Acetate, MESH: Forskolin, hormones, hormone substitutes, and hormone antagonists, Signal Transduction, MESH: Cells, Cultured, medicine.medical_specialty, endocrine system, Somatotropic cell, Growth-hormone-releasing hormone receptor, 030209 endocrinology & metabolism, In Vitro Techniques, Gonadotropic cell, 03 medical and health sciences, Cellular and Molecular Neuroscience, Species Specificity, Pituitary Gland, Anterior, Thyrotropin-releasing hormone receptor, Internal medicine, medicine, [SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Animals, MESH: Species Specificity, MESH: Tetradecanoylphorbol Acetate, 030304 developmental biology, Dose-Response Relationship, Drug, Endocrine and Autonomic Systems, Colforsin, Neuropeptides, MESH: Pituitary Adenylate Cyclase-Activating Polypeptide, chemistry, Growth Hormone, MESH: Growth Hormone, Corticotropic cell
Abstract

In mammals, growth hormone (GH) is under a dual hypothalamic control exerted by growth hormone-releasing hormone (GHRH) and somatostatin (SRIH). We investigated GH release in a pleuronectiform teleost, the turbot (Psetta maxima), using a serum-free primary culture of dispersed pituitary cells. Cells released GH for up to 12 days in culture, indicating that turbot somatotropes do not require releasing hormone for their regulation. SRIH dose-dependently inhibited GH release up to a maximal inhibitory effect of 95%. None of the potential stimulators tested induced any change in basal GH release. Also, neither forskolin, an activator of adenylate cyclase, nor phorbol ester (TPA), an activator of protein kinase C, were able to modify GH release, suggesting that spontaneous basal release already represents the maximal secretory capacity of turbot somatotropes. In contrast, forskolin and TPA were able to increase GH release in the presence of SRIH. In this condition (coincubation with SRIH), pituitary adenylate cyclase-activating polypeptide (PACAP) stimulated GH release, whereas none of the other neuropeptides tested (GHRHs; sea bream or salmon or chicken II GnRHs; TRH; CRH) had any significant effect. These data indicate that inhibitory control by SRIH may be the basic control of GH production in teleosts and lower vertebrates, while PACAP may represent the ancestral growth hormone-releasing factor in teleosts, a role taken over in higher vertebrates by GHRH.

Published
2001

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