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Kovács A, Szabó E, László K, Kertes E, Zagorácz O, Mintál K, Tóth A, Gálosi R, Berta B, Lénárd L, Hormay E, László B, Zelena D, Tóth ZE. Brain RFamide Neuropeptides in Stress-Related Psychopathologies. Cells 2024; 13:1097. [PMID: 38994950 PMCID: PMC11240450 DOI: 10.3390/cells13131097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/21/2024] [Accepted: 06/22/2024] [Indexed: 07/13/2024] Open
Abstract
The RFamide peptide family is a group of proteins that share a common C-terminal arginine-phenylalanine-amide motif. To date, the family comprises five groups in mammals: neuropeptide FF, LPXRFamides/RFamide-related peptides, prolactin releasing peptide, QRFP, and kisspeptins. Different RFamide peptides have their own cognate receptors and are produced by different cell populations, although they all can also bind to neuropeptide FF receptors with different affinities. RFamide peptides function in the brain as neuropeptides regulating key aspects of homeostasis such as energy balance, reproduction, and cardiovascular function. Furthermore, they are involved in the organization of the stress response including modulation of pain. Considering the interaction between stress and various parameters of homeostasis, the role of RFamide peptides may be critical in the development of stress-related neuropathologies. This review will therefore focus on the role of RFamide peptides as possible key hubs in stress and stress-related psychopathologies. The neurotransmitter coexpression profile of RFamide-producing cells is also discussed, highlighting its potential functional significance. The development of novel pharmaceutical agents for the treatment of stress-related disorders is an ongoing need. Thus, the importance of RFamide research is underlined by the emergence of peptidergic and G-protein coupled receptor-based therapeutic targets in the pharmaceutical industry.
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Affiliation(s)
- Anita Kovács
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Evelin Szabó
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Kristóf László
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Erika Kertes
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Olga Zagorácz
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Kitti Mintál
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Attila Tóth
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Rita Gálosi
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Bea Berta
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - László Lénárd
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Edina Hormay
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Bettina László
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Dóra Zelena
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (A.K.); (E.S.); (K.L.); (E.K.); (O.Z.); (K.M.); (A.T.); (R.G.); (B.B.); (L.L.); (E.H.); (B.L.)
| | - Zsuzsanna E. Tóth
- Department of Anatomy, Histology and Embryology, Semmelweis University, H1094 Budapest, Hungary
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2
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Elhabazi K, Humbert JP, Bertin I, Quillet R, Utard V, Schneider S, Schmitt M, Bourguignon JJ, Laboureyras E, Ben Boujema M, Simonnet G, Ancel C, Simonneaux V, Beltramo M, Bucher B, Sorg T, Meziane H, Schneider E, Petit-Demoulière B, Ilien B, Bihel F, Simonin F. RF313, an orally bioavailable neuropeptide FF receptor antagonist, opposes effects of RF-amide-related peptide-3 and opioid-induced hyperalgesia in rodents. Neuropharmacology 2017; 118:188-198. [DOI: 10.1016/j.neuropharm.2017.03.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 02/27/2017] [Accepted: 03/06/2017] [Indexed: 02/08/2023]
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3
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Kim JS. What's in a Name? Roles of RFamide-Related Peptides Beyond Gonadotrophin Inhibition. J Neuroendocrinol 2016; 28. [PMID: 27369805 DOI: 10.1111/jne.12407] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/21/2016] [Accepted: 06/23/2016] [Indexed: 12/29/2022]
Abstract
RFamide-related peptides (RFRPs) have been heavily implicated in the control of reproductive function subsequent to their discovery more than 16 years ago. However, recent studies using genetic and pharmacological tools have challenged their importance in regulating the hypothalamic-pituitary-gonadal axis. It is generally accepted that RFRPs act as part of a wider RFamide system, which involves two receptors, called the neuropeptide FF receptors (NPFFR1 and R2), and includes the closely-related neuropeptide NPFF. NPFF has been studied ever since the 1980s and many of the functions of NPFF are also shared by RFRPs. The current review questions whether these functions of NPFF are indeed specific to just NPFF alone and presents evidence from both neuroendocrine and pharmacological perspectives. Furthermore, recently emerging new functions of RFRPs are discussed with the overall goal of clarifying the functions of RFRPs beyond the hypothalamic-pituitary-gonadal axis.
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Affiliation(s)
- J S Kim
- Centre for Neuroendocrinology and Department of Anatomy, University of Otago, Dunedin, New Zealand
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4
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Quillet R, Ayachi S, Bihel F, Elhabazi K, Ilien B, Simonin F. RF-amide neuropeptides and their receptors in Mammals: Pharmacological properties, drug development and main physiological functions. Pharmacol Ther 2016; 160:84-132. [PMID: 26896564 DOI: 10.1016/j.pharmthera.2016.02.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
RF-amide neuropeptides, with their typical Arg-Phe-NH2 signature at their carboxyl C-termini, belong to a lineage of peptides that spans almost the entire life tree. Throughout evolution, RF-amide peptides and their receptors preserved fundamental roles in reproduction and feeding, both in Vertebrates and Invertebrates. The scope of this review is to summarize the current knowledge on the RF-amide systems in Mammals from historical aspects to therapeutic opportunities. Taking advantage of the most recent findings in the field, special focus will be given on molecular and pharmacological properties of RF-amide peptides and their receptors as well as on their implication in the control of different physiological functions including feeding, reproduction and pain. Recent progress on the development of drugs that target RF-amide receptors will also be addressed.
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Affiliation(s)
- Raphaëlle Quillet
- Biotechnologie et Signalisation Cellulaire, UMR 7242 CNRS, Université de Strasbourg, Illkirch, France
| | - Safia Ayachi
- Biotechnologie et Signalisation Cellulaire, UMR 7242 CNRS, Université de Strasbourg, Illkirch, France
| | - Frédéric Bihel
- Laboratoire Innovation Thérapeutique, UMR 7200 CNRS, Université de Strasbourg, Illkirch, France
| | - Khadija Elhabazi
- Biotechnologie et Signalisation Cellulaire, UMR 7242 CNRS, Université de Strasbourg, Illkirch, France
| | - Brigitte Ilien
- Biotechnologie et Signalisation Cellulaire, UMR 7242 CNRS, Université de Strasbourg, Illkirch, France
| | - Frédéric Simonin
- Biotechnologie et Signalisation Cellulaire, UMR 7242 CNRS, Université de Strasbourg, Illkirch, France.
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5
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Lin Y, Kao S, Day Y, Chang C, Chen J. Altered nociception and morphine tolerance in neuropeptide FF receptor type 2 over-expressing mice. Eur J Pain 2015; 20:895-906. [DOI: 10.1002/ejp.814] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Y.T. Lin
- Department of Physiology and Pharmacology; Graduate Institute of Biomedical Sciences; Chang Gung University; Tao-Yuan Taiwan
| | - S.C. Kao
- Department of Anesthesiology; Chang Gung Memorial Hospital; Tao-Yuan Taiwan
| | - Y.J. Day
- Department of Anesthesiology; Chang Gung Memorial Hospital; Tao-Yuan Taiwan
| | - C.C. Chang
- Department of Chemistry; Fu Jen Catholic University; New Taipei City Taiwan
| | - J.C. Chen
- Department of Physiology and Pharmacology; Graduate Institute of Biomedical Sciences; Chang Gung University; Tao-Yuan Taiwan
- Healthy Aging Research Center; Chang Gung University; Tao-Yuan Taiwan
- Neuroscience Research Center; Chang Gung Memorial Hospital; Tao-Yuan Taiwan
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Fanelli R, Besserer-Offroy É, René A, Côté J, Tétreault P, Collerette-Tremblay J, Longpré JM, Leduc R, Martinez J, Sarret P, Cavelier F. Synthesis and Characterization in Vitro and in Vivo of (l)-(Trimethylsilyl)alanine Containing Neurotensin Analogues. J Med Chem 2015; 58:7785-95. [DOI: 10.1021/acs.jmedchem.5b00841] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Roberto Fanelli
- Institut des Biomolécules
Max Mousseron, IBMM, UMR-5247, CNRS, Université Montpellier,
ENSCM, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Élie Besserer-Offroy
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Adeline René
- Institut des Biomolécules
Max Mousseron, IBMM, UMR-5247, CNRS, Université Montpellier,
ENSCM, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Jérôme Côté
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Pascal Tétreault
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Jasmin Collerette-Tremblay
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Jean-Michel Longpré
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Richard Leduc
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Jean Martinez
- Institut des Biomolécules
Max Mousseron, IBMM, UMR-5247, CNRS, Université Montpellier,
ENSCM, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Philippe Sarret
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Florine Cavelier
- Institut des Biomolécules
Max Mousseron, IBMM, UMR-5247, CNRS, Université Montpellier,
ENSCM, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
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Ayachi S, Simonin F. Involvement of Mammalian RF-Amide Peptides and Their Receptors in the Modulation of Nociception in Rodents. Front Endocrinol (Lausanne) 2014; 5:158. [PMID: 25324831 PMCID: PMC4183120 DOI: 10.3389/fendo.2014.00158] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 09/17/2014] [Indexed: 01/04/2023] Open
Abstract
Mammalian RF-amide peptides, which all share a conserved carboxyl-terminal Arg-Phe-NH2 sequence, constitute a family of five groups of neuropeptides that are encoded by five different genes. They act through five G-protein-coupled receptors and each group of peptide binds to and activates mostly one receptor: RF-amide related peptide group binds to NPFFR1, neuropeptide FF group to NPFFR2, pyroglutamylated RF-amide peptide group to QRFPR, prolactin-releasing peptide group to prolactin-releasing peptide receptor, and kisspeptin group to Kiss1R. These peptides and their receptors have been involved in the modulation of several functions including reproduction, feeding, and cardiovascular regulation. Data from the literature now provide emerging evidence that all RF-amide peptides and their receptors are also involved in the modulation of nociception. This review will present the current knowledge on the involvement in rodents of the different mammalian RF-amide peptides and their receptors in the modulation of nociception in basal and chronic pain conditions as well as their modulatory effects on the analgesic effects of opiates.
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Affiliation(s)
- Safia Ayachi
- UMR 7242 CNRS, Laboratory of Excellence Medalis, Biotechnologie et Signalisation Cellulaire, Université de Strasbourg, Illkirch, France
| | - Frédéric Simonin
- UMR 7242 CNRS, Laboratory of Excellence Medalis, Biotechnologie et Signalisation Cellulaire, Université de Strasbourg, Illkirch, France
- *Correspondence: Frédéric Simonin, UMR 7242 CNRS, Laboratory of Excellence Medalis, Biotechnologie et Signalisation Cellulaire, Université de Strasbourg, 300 Boulevard Sébastien Brant, Illkirch 67412, France e-mail:
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Jászberényi M, Bagosi Z, Csabafi K, Palotai M, Telegdy G. The actions of neuropeptide SF on the hypothalamic-pituitary-adrenal axis and behavior in rats. ACTA ACUST UNITED AC 2013; 188:46-51. [PMID: 24316399 DOI: 10.1016/j.regpep.2013.11.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 11/26/2013] [Accepted: 11/29/2013] [Indexed: 12/26/2022]
Abstract
Present experiments focused on measuring the effect of neuropeptide SF (NPSF) on the hypothalamus-pituitary-adrenal (HPA) axis and behavior. The peptide was administered in different doses (0.25, 0.5, 1, 2 μg) intracerebroventricularly to rats, and the behavior of which was then observed by telemetry and open-field test. Effect of NPSF on core temperature was also measured via telemetry. Plasma ACTH and corticosterone concentrations were measured to assess the influence of NPSF on the HPA activation. In addition, the changes in corticotrophin-releasing hormone (CRH) level in the hypothalamic paraventricular nucleus were continuously monitored by means of intracerebral microdialysis. Our results showed that NPSF augmented paraventricular CRH release and increased ACTH and corticosterone levels in the plasma. The release of corticosterone was successfully blocked by the pre-treatment of the CRH antagonist α-helical CRH9-41. Spontaneous and exploratory locomotor activity was also stimulated according to the telemetric and open-field studies. However, NPSF only tended to alter stereotyped behavior in the open-field experiments. These results demonstrate that NPSF may play a physiologic role in the regulation of such circadian functions as the activity of motor centers and the HPA axis, through the release of CRH.
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Affiliation(s)
| | - Zsolt Bagosi
- Department of Pathophysiology, University of Szeged, Szeged, Hungary
| | - Krisztina Csabafi
- Department of Pathophysiology, University of Szeged, Szeged, Hungary
| | - Miklós Palotai
- Department of Pathophysiology, University of Szeged, Szeged, Hungary
| | - Gyula Telegdy
- Department of Pathophysiology, University of Szeged, Szeged, Hungary; MTA-SZTE Neuroscience Research Group of the Hungarian Academy of Sciences Szeged, Szeged, Hungary.
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Kovács A, László K, Gálosi R, Tóth K, Ollmann T, Péczely L, Lénárd L. Microinjection of RFRP-1 in the central nucleus of amygdala decreases food intake in the rat. Brain Res Bull 2012; 88:589-95. [PMID: 22691952 DOI: 10.1016/j.brainresbull.2012.06.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 05/31/2012] [Accepted: 06/01/2012] [Indexed: 10/28/2022]
Abstract
Several members of the RFamide peptide family are known to have role in the regulation of feeding. For example, neuropeptide FF and prolactin-releasing peptide cause anorexigenic, while 26RFa and QRFP result in orexigenic effects in rodents. I.c.v. microinjection of neuropeptide RFRP-1 significantly reduced food and water intake in chicks. However, feeding related effects of RFRP-1 have not been studied in mammals yet. The central part of amygdala (CeA) is essentially involved in the regulation of feeding and body weight. RFRP-1 positive nerve cells were detected in the rat hypothalamus and RFRP-1 immunoreactive fibers were identified in the CeA. RFRP analogs bind with relatively high affinity to the NPFF1 and NPFF2 receptors (NPFF-R). RFRP-1 has potent activity for NPFF1. Significant expression of NPFF1 was detected in the CeA. To evaluate the role of RFRP-1 in feeding regulation rats were microinjected with different doses of RFRP-1 and their food intake were quantified over a 60min period. Liquid food intake of male Wistar rats was measured after bilateral intraamygdaloid administration of RFRP-1 (25, 50 or 100ng/side, RFRP-1 dissolved in 0.15M sterile NaCl/0.4μl, respectively). The 50ng dose of RFRP-1 microinjections resulted in significant decrease of food intake. The 25 and 100ng had no effect. Action of 50ng (37.8pmol) RFRP-1 was eliminated by 20ng (41.4pmol) RF9 NPFF-R antagonist pretreatment. In open-field test 50ng RFRP-1 did not modify spontaneous locomotor activity and general behavior of animals did not change. Our results are the first reporting that RFRP-1 injected to the CeA result in a decrease of liquid food consumption. This is a receptor-linked effect because it was eliminated by a NPFF-R selective antagonist.
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Affiliation(s)
- Anita Kovács
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
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Moulédous L, Mollereau C, Zajac JM. Opioid-modulating properties of the neuropeptide FF system. Biofactors 2010; 36:423-9. [PMID: 20803521 DOI: 10.1002/biof.116] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 06/30/2010] [Indexed: 12/21/2022]
Abstract
Opioid receptors are involved in the control of pain perception in the central nervous system together with endogenous neuropeptides, termed opioid-modulating peptides, participating in a homeostatic system. Neuropeptide FF (NPFF) and related peptides possess anti-opioid properties, the cellular mechanisms of which are still unclear. The purpose of this review is to detail the phenomenon of cross-talk taking place between opioid and NPFF systems at the in vivo pharmacological level and to propose cellular and molecular models of functioning. A better knowledge of the mechanisms underlying opioid-modulating properties of NPFF has potential therapeutic interest for the control of opioid functions, notably for alleviating pain and/or for the treatment of opioid abuse.
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Affiliation(s)
- Lionel Moulédous
- Institut de Pharmacologie et de Biologie Structurale, CNRS UMR5089, Université de Toulouse, 205 route de Narbonne, Toulouse CEDEX 04, France
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Newmyer BA, Siegel PB, Cline MA. Neuropeptide AF differentially affects anorexia in lines of chickens selected for high or low body weight. J Neuroendocrinol 2010; 22:593-8. [PMID: 20236226 DOI: 10.1111/j.1365-2826.2010.01991.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The recently discovered anorectic effect of neuropeptide AF (NPAF) has not been studied in hypo-and hyperphagia animal models. The present study was designed to examine possible differences in appetite-related effects after central NPAF administration in lines of chickens that had undergone long-term divergent selection for low (LWS) or high (HWS) body weight and exhibit hypo- and hyperphagia, respectively. LWS chicks responded at a similar magnitude of food intake reduction to all doses of NPAF tested at all observation times. HWS chicks had an increased latency (150 min versus 30 min post injection) and an increased dose threshold of response (8 nmol versus 2 nmol) than LWS chicks. Water intake of LWS chicks was reduced in all doses tested at all observation times, whereas HWS chicks responded to the three doses of NPAF tested up to 60 min post injection, after which the decrease was sustained only at a dose of 8 nmol. In a comprehensive behaviour analysis, exploratory pecks, food pecks and locomotion were significantly reduced in both lines by NPAF, whereas sit time was increased in both lines. Other behaviours, including stand time, deep rest time and escape attempts, were not affected. These data suggest that the threshold of NPAF-induced anorexia is lower in LWS than HWS chicks and that NPAF-induced anorexia is a primary effect in both lines, and also support the hypothesis that differences exist in the central NPAF system between hypo- and hyperphagic individuals.
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Affiliation(s)
- B A Newmyer
- Department of Biology, Radford University, Radford, VA 24142, USA
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Talmont F, Moulédous L, Piedra-Garcia L, Schmitt M, Bihel F, Bourguignon JJ, Zajac JM, Mollereau C. Pharmacological characterization of the mouse NPFF2 receptor. Peptides 2010; 31:215-20. [PMID: 19944730 DOI: 10.1016/j.peptides.2009.11.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 11/05/2009] [Accepted: 11/10/2009] [Indexed: 10/20/2022]
Abstract
This study presents the binding and functional properties of the mouse NPFF(2) (mNPFF(2)) receptor, in comparison with its human counterpart (hNPFF(2)). Binding experiments were performed by using the NPFF(2) selective radioligand [(3)H]-EYF in membranes from CHO cells transfected with mouse and human NPFF(2) receptors and compared to membranes from mouse olfactory bulb, the brain region expressing the highest density of NPFF(2) receptors in mouse. mNPFF(2) receptors exhibited a high affinity (Kd=0.2-0.4 nM) for [(3)H]-EYF, comparable to that of hNPFF(2) receptors. Also, the binding selectivity profile of mNPFF(2) receptors was comparable to that of hNPFF(2) receptors, except for three ligands (NPSF, NPVF, RF9) that were about tenfold more potent and active on mouse receptors than on human receptors. In particular, compared to hNPFF(2) receptors, mNPFF(2) receptors were less discriminative towards the proNPFF(B)-derived peptide. This suggests some species-related differences in the binding properties of NPFF(2) receptors that could have repercussion when evaluating the pharmacological properties of drugs in vivo.
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Affiliation(s)
- Franck Talmont
- CNRS/IPBS (Institut de Pharmacologie et Biologie Structurale), 205 route de Narbonne, 31077 Toulouse Cedex, France
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Neuropeptide SF is associated with reduced food intake in chicks. Behav Brain Res 2009; 205:311-4. [DOI: 10.1016/j.bbr.2009.06.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2009] [Revised: 06/05/2009] [Accepted: 06/09/2009] [Indexed: 01/23/2023]
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Dylag T, Pachuta A, Raoof H, Kotlinska J, Silberring J. A novel cryptic peptide derived from the rat neuropeptide FF precursor reverses antinociception and conditioned place preference induced by morphine. Peptides 2008; 29:473-8. [PMID: 17980934 DOI: 10.1016/j.peptides.2007.09.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2007] [Revised: 09/20/2007] [Accepted: 09/21/2007] [Indexed: 12/21/2022]
Abstract
Neuropeptide FF (NPFF) precursors from different species contain at least three known neuropeptides, i.e. FF (FLFQPQRF-NH(2)), AF (AGEGLSSPFWSLAAPQR-NH(2)) and SF (SLAAPQRF-NH(2)). We demonstrate that the rat NPFF precursor contains another bioactive sequence, NAWGPWSKEQLSPQA, spanning between positions 85 and 99. Synthetic NPFF precursor (85-99) (10 and 20 nmol, i.c.v.) blocked the expression of conditioned place preference induced by morphine (5 mg/kg, s.c.). This peptide alone (10 and 20 nmol, i.c.v.) had no influence on the baseline latency of a nociceptive reaction but reversed the antinociceptive activity of morphine (5 mg/kg, s.c.) in the tail-immersion test in rats. These data suggest the existence of a novel bioactive cryptic peptide within an already known NPFF precursor.
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Affiliation(s)
- Tomasz Dylag
- Faculty of Chemistry and Regional Laboratory, Jagiellonian University, Ingardena 3, Krakow, Poland
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Yang HYT, Tao T, Iadarola MJ. Modulatory role of neuropeptide FF system in nociception and opiate analgesia. Neuropeptides 2008; 42:1-18. [PMID: 17854890 DOI: 10.1016/j.npep.2007.06.004] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2007] [Accepted: 06/14/2007] [Indexed: 10/22/2022]
Abstract
The tetra-peptide FMRF-NH(2) is a cardioexcitatory peptide in the clam. Using the antibody against this peptide, FMRF-NH(2)-like immunoreactive material was detected in mammalian CNS. Subsequently, mammalian FMRF-NH(2) immunoreactive peptides were isolated from bovine brain and characterized to be FLFQPQRF-NH(2) (NPFF) and AGEGLSSPFWSLAAPQRF-NH(2) (NPAF). The genes encoding NPFF precursor proteins and NPFF receptors 1 and 2 are expressed in all vertebrate species examined to date and are highly conserved. Among many biological roles suggested for the NPFF system, the possible modulatory role of NPFF in nocicetion and opiate analgesia has been most widely investigated. Pharmacologically, NPFF-related peptides were found to exhibit analgesia and also potentiate the analgesic activity of opiates when administered intrathecally but attenuate the opiate induced analgesia when administered intracerebroventricularly. RF-NH(2) peptides including NPFF-related peptides were found to delay the rate of acid sensing ion channels (ASIC) desensitization resulting in enhancing acid gated currents, raising the possibility that NPFF also may have a pain modulatory role through ASIC. The genes for NPFF as well as NPFF-R2, preferred receptor for NPFF, are highly unevenly expressed in the rat CNS with the highest levels localized to the superficial layers of the dorsal spinal cord. These two genes are also present in the dorsal root ganglia (DRG), though at low levels in normal rats. NPFF and NPFF-R2 mRNAs were found to be coordinately up-regulated in spinal cord and DRG of rats with peripheral inflammation. In addition, NPFF-R2 immunoreactivity in the primary afferents was increased by peripheral inflammation. The findings from the early studies on the analgesic and morphine modulating activities suggested a role for NPFF in pain modulation and this possibility is further supported by the distribution of NPFF and its receptor and the regulation of the NPFF system in vivo.
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Affiliation(s)
- Hsiu-Ying T Yang
- Neurobiology and Pain Therapeutics Section, National Institute of Dental and Craniofacial Research, NIH, Bethesda, MD 20892-4410, USA.
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Abstract
This paper is the 29th consecutive installment of the annual review of research concerning the endogenous opioid system, now spanning 30 years of research. It summarizes papers published during 2006 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurological disorders (Section 11); electrical-related activity and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); and immunological responses (Section 17).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, CUNY, 65-30 Kissena Blvd., Flushing, NY 11367, United States.
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Abul-Husn NS, Sutak M, Milne B, Jhamandas K. Augmentation of spinal morphine analgesia and inhibition of tolerance by low doses of mu- and delta-opioid receptor antagonists. Br J Pharmacol 2007; 151:877-87. [PMID: 17502848 PMCID: PMC2014123 DOI: 10.1038/sj.bjp.0707277] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE Ultralow doses of naltrexone, a non-selective opioid antagonist, have previously been found to augment acute morphine analgesia and block the development of tolerance to this effect. Since morphine tolerance is dependent on the activity of micro and delta receptors, the present study investigated the effects of ultralow doses of antagonists selective for these receptor types on morphine analgesia and tolerance in tests of thermal and mechanical nociception. EXPERIMENTAL APPROACH Effects of intrathecal administration of mu-receptor antagonists, CTOP (0.01 ng) or CTAP (0.001 ng), or a delta-receptor antagonist, naltrindole (0.01 ng), on spinal morphine analgesia and tolerance were evaluated using the tail-flick and paw-pressure tests in rats. KEY RESULTS Both micro and delta antagonists augmented analgesia produced by a sub-maximal (5 microg) or maximal (15 microg) dose of morphine. Administration of the antagonists with morphine (15 microg) for 5 days inhibited the progressive decline of analgesia and prevented the loss of morphine potency. In animals exhibiting tolerance to morphine, administration of the antagonists with morphine produced a recovery of the analgesic response and restored morphine potency. CONCLUSIONS AND IMPLICATIONS Combining ultralow doses of micro- or delta-receptor antagonists with spinal morphine augmented the acute analgesic effects, inhibited the induction of chronic tolerance and reversed established tolerance. The remarkably similar effects of micro- and delta-opioid receptor antagonists on morphine analgesia and tolerance are interpreted in terms of blockade of the latent excitatory effects of the agonist that limit expression of its full activity.
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Affiliation(s)
- N S Abul-Husn
- Department of Pharmacology and Toxicology, Queen's University Kingston, Ontario, Canada
| | - M Sutak
- Department of Pharmacology and Toxicology, Queen's University Kingston, Ontario, Canada
- Department of Anesthesiology, Queen's University Kingston, Ontario, Canada
| | - B Milne
- Department of Pharmacology and Toxicology, Queen's University Kingston, Ontario, Canada
- Department of Anesthesiology, Queen's University Kingston, Ontario, Canada
| | - K Jhamandas
- Department of Pharmacology and Toxicology, Queen's University Kingston, Ontario, Canada
- Department of Anesthesiology, Queen's University Kingston, Ontario, Canada
- Author for correspondence:
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Kriegsfeld LJ. Driving reproduction: RFamide peptides behind the wheel. Horm Behav 2006; 50:655-66. [PMID: 16876801 PMCID: PMC3427797 DOI: 10.1016/j.yhbeh.2006.06.004] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2006] [Revised: 06/06/2006] [Accepted: 06/06/2006] [Indexed: 11/20/2022]
Abstract
The availability of tools for probing the genome and proteome more efficiently has allowed for the rapid discovery of novel genes and peptides that play important, previously uncharacterized roles in neuroendocrine regulation. In this review, the role of a class of neuropeptides containing the C-terminal Arg-Phe-NH(2) (RFamide) in regulating the reproductive axis will be highlighted. Neuropeptides containing the C-terminal Phe-Met-Arg-Phe-NH(2) (FMRFamide) were first identified as cardioregulatory elements in the bi-valve mollusk Macrocallista nimbosa. During the past two decades, numerous studies have shown the presence of structurally similar peptides sharing the RFamide motif across taxa. In vertebrates, RFamide peptides have pronounced influences on opiatergic regulation and neuroendocrine function. Two key peptides in this family are emerging as important regulators of the reproductive axis, kisspeptin and gonadotropin-inhibitory hormone (GnIH). Kisspeptin acts as the accelerator, directly driving gonadotropin-releasing hormone (GnRH) neurons, whereas GnIH acts as the restraint. Recent evidence suggests that both peptides play a role in mediating the negative feedback effects of sex steroids. This review presents the hypothesis that these peptides share complementary roles by responding to internal and external stimuli with opposing actions to precisely regulate the reproductive axis.
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Affiliation(s)
- Lance J Kriegsfeld
- Department of Psychology and Helen Wills Neuroscience Institute, 3210 Tolman Hall, # 1650, University of California, Berkeley, CA 94720-1650, USA.
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Gouardères C, Mazarguil H, Mollereau C, Chartrel N, Leprince J, Vaudry H, Zajac JM. Functional differences between NPFF1 and NPFF2 receptor coupling: high intrinsic activities of RFamide-related peptides on stimulation of [35S]GTPgammaS binding. Neuropharmacology 2006; 52:376-86. [PMID: 17011599 DOI: 10.1016/j.neuropharm.2006.07.034] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2006] [Revised: 07/28/2006] [Accepted: 07/28/2006] [Indexed: 11/30/2022]
Abstract
By using an optimized [(35)S]GTPgammaS binding assay, the functional activities (potency and efficacy) of peptides belonging to three members of the RFamide family; Neuropeptide FF (NPFF), prolactin-releasing peptide (PrRP) and 26RFamide, were investigated on NPFF(1) and NPFF(2) receptors stably expressed in Chinese Hamster Ovary (CHO) cells. Despite their large differences in affinity and selectivity, all analogues tested behaved as agonists toward NPFF(1) and NPFF(2) receptors. High NaCl concentration in the assay strongly increased the efficacy toward NPFF(2) receptors and augmented differences among agonists. In low sodium conditions, whereas the potencies of agonists correlated with their affinities for NPFF(1) receptors, NPFF(2) receptors exhibited an extraordinary activity since all compounds tested displayed EC(50) values of GTPgammaS binding lower than their K(I) values. Comparisons of functional values between NPFF(1) and NPFF(2) receptors revealed unexpected potent selective NPFF(2) agonists especially for the PLRFamide and the VGRFamide sequences. By using blocker peptides, we also show that Galpha(i3) and Galpha(s) are the main transducers of NPFF(1) receptors while NPFF(2) are probably coupled with Galpha(i2), Galpha(i3), Galpha(o) and Galpha(s) proteins. Our data indicate that NPPF(1) and NPFF(2) receptors are differently coupled to G proteins in CHO cells.
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Affiliation(s)
- C Gouardères
- Institut de Pharmacologie et de Biologie Structurale, CNRS UMR 5089, 205 Route de Narbonne, 31077 Toulouse Cedex, France
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