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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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Wang Y, Zuo Z, Shi J, Fang Y, Yin Z, Wang Z, Yang Z, Jia B, Sun Y. Modulatory role of neuropeptide FF system in macrophages. Peptides 2024; 174:171164. [PMID: 38272240 DOI: 10.1016/j.peptides.2024.171164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/29/2023] [Accepted: 01/19/2024] [Indexed: 01/27/2024]
Abstract
Neuropeptide FF (NPFF) is an octapeptide that regulates various cellular processes, especially pain perception. Recently, there has been a growing interest in understanding the modulation of NPFF in neuroendocrine inflammation. This review aims to provide a thorough overview of the regulation of NPFF in macrophage-mediated biological processes. We delve into the impact of NPFF on macrophage polarization, self-renewal modulation, and the promotion of mitophagy, facilitating the transition from thermogenic fat to fat-storing adipose tissue. Additionally, we explore the NPFF-dependent regulation of the inflammatory response mediated by macrophages, its impact on the differentiation of macrophages, and its capacity to induce alterations in the transcriptome of macrophages. We also address the potential of NPFF as a therapeutic molecule in the field of neuroendocrine inflammation. Overall, our work offers an understanding of the influence of NPFF on macrophage, facilitating the exploration of its pharmacological significance in future studies.
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Affiliation(s)
- Yaxing Wang
- School of Life Sciences, Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Engineering Research Center of Chinese Ministry of Education for Biological Diagnosis, Treatment and Protection Technology and Equipment in Special Environment, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Zhuo Zuo
- School of Life Sciences, Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Engineering Research Center of Chinese Ministry of Education for Biological Diagnosis, Treatment and Protection Technology and Equipment in Special Environment, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Jiajia Shi
- School of Life Sciences, Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Engineering Research Center of Chinese Ministry of Education for Biological Diagnosis, Treatment and Protection Technology and Equipment in Special Environment, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Yanwei Fang
- School of Life Sciences, Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Engineering Research Center of Chinese Ministry of Education for Biological Diagnosis, Treatment and Protection Technology and Equipment in Special Environment, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Zhongqian Yin
- School of Life Sciences, Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Engineering Research Center of Chinese Ministry of Education for Biological Diagnosis, Treatment and Protection Technology and Equipment in Special Environment, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Zhe Wang
- School of Life Sciences, Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Engineering Research Center of Chinese Ministry of Education for Biological Diagnosis, Treatment and Protection Technology and Equipment in Special Environment, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Zhouqi Yang
- School of Life Sciences, Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Engineering Research Center of Chinese Ministry of Education for Biological Diagnosis, Treatment and Protection Technology and Equipment in Special Environment, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Bin Jia
- School of Life Sciences, Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Engineering Research Center of Chinese Ministry of Education for Biological Diagnosis, Treatment and Protection Technology and Equipment in Special Environment, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Yulong Sun
- School of Life Sciences, Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Engineering Research Center of Chinese Ministry of Education for Biological Diagnosis, Treatment and Protection Technology and Equipment in Special Environment, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China.
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Quillet R, Dickie AC, Polgár E, Gutierrez-Mecinas M, Bell AM, Goffin L, Watanabe M, Todd AJ. Characterisation of NPFF-expressing neurons in the superficial dorsal horn of the mouse spinal cord. Sci Rep 2023; 13:5891. [PMID: 37041197 PMCID: PMC10090074 DOI: 10.1038/s41598-023-32720-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 03/31/2023] [Indexed: 04/13/2023] Open
Abstract
Excitatory interneurons in the superficial dorsal horn (SDH) are heterogeneous, and include a class known as vertical cells, which convey information to lamina I projection neurons. We recently used pro-NPFF antibody to reveal a discrete population of excitatory interneurons that express neuropeptide FF (NPFF). Here, we generated a new mouse line (NPFFCre) in which Cre is knocked into the Npff locus, and used Cre-dependent viruses and reporter mice to characterise NPFF cell properties. Both viral and reporter strategies labelled many cells in the SDH, and captured most pro-NPFF-immunoreactive neurons (75-80%). However, the majority of labelled cells lacked pro-NPFF, and we found considerable overlap with a population of neurons that express the gastrin-releasing peptide receptor (GRPR). Morphological reconstruction revealed that most pro-NPFF-containing neurons were vertical cells, but these differed from GRPR neurons (which are also vertical cells) in having a far higher dendritic spine density. Electrophysiological recording showed that NPFF cells also differed from GRPR cells in having a higher frequency of miniature EPSCs, being more electrically excitable and responding to a NPY Y1 receptor agonist. Together, these findings indicate that there are at least two distinct classes of vertical cells, which may have differing roles in somatosensory processing.
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Affiliation(s)
- Raphaëlle Quillet
- School of Psychology and Neuroscience, Sir James Black Building, University of Glasgow, Glasgow, G12 8QQ, UK.
| | - Allen C Dickie
- School of Psychology and Neuroscience, Sir James Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Erika Polgár
- School of Psychology and Neuroscience, Sir James Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Maria Gutierrez-Mecinas
- School of Psychology and Neuroscience, Sir James Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Andrew M Bell
- School of Psychology and Neuroscience, Sir James Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Luca Goffin
- School of Psychology and Neuroscience, Sir James Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Masahiko Watanabe
- Department of Anatomy, Hokkaido University School of Medicine, Sapporo, 060-8638, Japan
| | - Andrew J Todd
- School of Psychology and Neuroscience, Sir James Black Building, University of Glasgow, Glasgow, G12 8QQ, UK.
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Kupcova I, Danisovic L, Grgac I, Harsanyi S. Anxiety and Depression: What Do We Know of Neuropeptides? Behav Sci (Basel) 2022; 12:bs12080262. [PMID: 36004833 PMCID: PMC9405013 DOI: 10.3390/bs12080262] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/11/2022] [Accepted: 07/27/2022] [Indexed: 12/04/2022] Open
Abstract
In modern society, there has been a rising trend of depression and anxiety. This trend heavily impacts the population’s mental health and thus contributes significantly to morbidity and, in the worst case, to suicides. Modern medicine, with many antidepressants and anxiolytics at hand, is still unable to achieve remission in many patients. The pathophysiology of depression and anxiety is still only marginally understood, which encouraged researchers to focus on neuropeptides, as they are a vast group of signaling molecules in the nervous system. Neuropeptides are involved in the regulation of many physiological functions. Some act as neuromodulators and are often co-released with neurotransmitters that allow for reciprocal communication between the brain and the body. Most studied in the past were the antidepressant and anxiolytic effects of oxytocin, vasopressin or neuropeptide Y and S, or Substance P. However, in recent years, more and more novel neuropeptides have been added to the list, with implications for the research and development of new targets, diagnostic elements, and even therapies to treat anxiety and depressive disorders. In this review, we take a close look at all currently studied neuropeptides, their related pathways, their roles in stress adaptation, and the etiology of anxiety and depression in humans and animal models. We will focus on the latest research and information regarding these associated neuropeptides and thus picture their potential uses in the future.
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Affiliation(s)
- Ida Kupcova
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 4, 811 08 Bratislava, Slovakia; (I.K.); (L.D.)
| | - Lubos Danisovic
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 4, 811 08 Bratislava, Slovakia; (I.K.); (L.D.)
| | - Ivan Grgac
- Institute of Anatomy, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 4, 811 08 Bratislava, Slovakia;
| | - Stefan Harsanyi
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 4, 811 08 Bratislava, Slovakia; (I.K.); (L.D.)
- Correspondence: ; Tel.: +421-2-59357-299
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Kaczyńska K, Wojciechowski P. Non-Opioid Peptides Targeting Opioid Effects. Int J Mol Sci 2021; 22:13619. [PMID: 34948415 PMCID: PMC8709238 DOI: 10.3390/ijms222413619] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/13/2021] [Accepted: 12/17/2021] [Indexed: 01/07/2023] Open
Abstract
Opioids are the most potent widely used analgesics, primarily, but not exclusively, in palliative care. However, they are associated with numerous side effects, such as tolerance, addiction, respiratory depression, and cardiovascular events. This, in turn, can result in their overuse in cases of addiction, the need for dose escalation in cases of developing tolerance, and the emergence of dose-related opioid toxicity, resulting in respiratory depression or cardiovascular problems that can even lead to unintentional death. Therefore, a very important challenge for researchers is to look for ways to counteract the side effects of opioids. The use of peptides and their related compounds, which have been shown to modulate the effects of opioids, may provide such an opportunity. This short review is a compendium of knowledge about the most important and recent findings regarding selected peptides and their modulatory effects on various opioid actions, including cardiovascular and respiratory responses. In addition to the peptides more commonly reported in the literature in the context of their pro- and/or anti-opioid activity-such as neuropeptide FF (NPFF), cholecystokinin (CCK), and melanocyte inhibiting factor (MIF)-we also included in the review nociceptin/orphanin (N/OFQ), ghrelin, oxytocin, endothelin, and venom peptides.
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Affiliation(s)
- Katarzyna Kaczyńska
- Department of Respiration Physiology, Mossakowski Medical Research Institute, Polish Academy of Sciences, Pawińskiego 5 St., 02-106 Warsaw, Poland;
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Wojciechowski P, Andrzejewski K, Kaczyńska K. Intracerebroventricular Neuropeptide FF Diminishes the Number of Apneas and Cardiovascular Effects Produced by Opioid Receptors' Activation. Int J Mol Sci 2020; 21:ijms21238931. [PMID: 33255594 PMCID: PMC7728097 DOI: 10.3390/ijms21238931] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/23/2020] [Accepted: 11/24/2020] [Indexed: 01/23/2023] Open
Abstract
The opioid-induced analgesia is associated with a number of side effects such as addiction, tolerance and respiratory depression. The involvement of neuropeptide FF (NPFF) in modulation of pain perception, opioid-induced tolerance and dependence was well documented in contrast to respiratory depression. Therefore, the aim of the present study was to examine the potency of NPFF to block post-opioid respiratory depression, one of the main adverse effects of opioid therapy. Urethane-chloralose anaesthetized Wistar rats were injected either intravenously (iv) or intracerebroventricularly (icv) with various doses of NPFF prior to iv endomorphin-1 (EM-1) administration. Iv NPFF diminished the number of EM-1-induced apneas without affecting their length and without influence on the EM-1 induced blood pressure decline. Icv pretreatment with NPFF abolished the occurrence of post-EM-1 apneas and reduced also the maximal drop in blood pressure and heart rate. These effects were completely blocked by the NPFF receptor antagonist RF9, which was given as a mixture with NPFF before systemic EM-1 administration. In conclusion, our results showed that centrally administered neuropeptide FF is effective in preventing apnea evoked by stimulation of μ-opioid receptors and the effect was due to activation of central NPFF receptors. Our finding indicates a potential target for reversal of opioid-induced respiratory depression.
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Gibula-Tarlowska E, Kotlinska JH. Crosstalk between Opioid and Anti-Opioid Systems: An Overview and Its Possible Therapeutic Significance. Biomolecules 2020; 10:E1376. [PMID: 32998249 PMCID: PMC7599993 DOI: 10.3390/biom10101376] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/20/2020] [Accepted: 09/23/2020] [Indexed: 12/23/2022] Open
Abstract
Opioid peptides and receptors are broadly expressed throughout peripheral and central nervous systems and have been the subject of intense long-term investigations. Such studies indicate that some endogenous neuropeptides, called anti-opioids, participate in a homeostatic system that tends to reduce the effects of endogenous and exogenous opioids. Anti-opioid properties have been attributed to various peptides, including melanocyte inhibiting factor (MIF)-related peptides, cholecystokinin (CCK), nociceptin/orphanin FQ (N/OFQ), and neuropeptide FF (NPFF). These peptides counteract some of the acute effects of opioids, and therefore, they are involved in the development of opioid tolerance and addiction. In this work, the anti-opioid profile of endogenous peptides was described, mainly taking into account their inhibitory influence on opioid-induced effects. However, the anti-opioid peptides demonstrated complex properties and could show opioid-like as well as anti-opioid effects. The aim of this review is to detail the phenomenon of crosstalk taking place between opioid and anti-opioid systems at the in vivo pharmacological level and to propose a cellular and molecular basis for these interactions. A better knowledge of these mechanisms 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)
- Ewa Gibula-Tarlowska
- Department of Pharmacology and Pharmacodynamics, Medical University, 20-059 Lublin, Poland;
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Zhang R, Xu B, Zhang Q, Chen D, Zhang M, Zhao G, Xu K, Xiao J, Zhu H, Niu J, Li N, Fang Q. Spinal administration of the multi-functional opioid/neuropeptide FF agonist BN-9 produced potent antinociception without development of tolerance and opioid-induced hyperalgesia. Eur J Pharmacol 2020; 880:173169. [PMID: 32416184 DOI: 10.1016/j.ejphar.2020.173169] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 04/24/2020] [Accepted: 05/04/2020] [Indexed: 10/24/2022]
Abstract
Chronic opioids treatment is impeded by the development of analgesic tolerance and opioid-induced hyperalgesia. Recent studies have shown that multi-functional opioid compounds produce analgesic activities with limited side effects. We developed a novel multi-functional peptide targeting opioid and neuropeptide FF receptors named BN-9, which produced potent and non-tolerance forming antinociceptive effect after supraspinal and systemic administrations. In the present study, the analgesic properties and potential side effects of intrathecal BN-9 were investigated in a range of preclinical rodent models. In complete Freund's adjuvant-induced inflammatory pain model, intrathecal BN-9 dose-dependently produced analgesic effect via opioid receptors, and the spinal antinociceptive effect was augmented by the neuropeptide FF receptor antagonist RF9. In contrast, in plantar incision-induced postoperative pain model, BN-9 exhibited potent anti-allodynic effect via opioid receptors and, at least partially, neuropeptide FF receptors. In mouse models of acetic acid-induced visceral pain and formalin pain, BN-9-induced spinal antinociception was mainly mediated by opioid receptors, independent of neuropeptide FF receptors. Furthermore, at the spinal level, chronic treatments with BN-9 did not lead to analgesic tolerance and cross-tolerance to morphine. Moreover, opioid-induced hyperalgesia was observed after repeated administration of morphine, but not BN-9. Taken together, our present study suggests that intrathecal BN-9 produces potent and non-tolerance forming antinociception, and does not cause opioid-induced hyperalgesia. Thus, BN-9 might serve as a promising lead compound in the development of multi-functional opioid analgesics with minimized side effects.
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Affiliation(s)
- Run Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Biao Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Qinqin Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Dan Chen
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Mengna Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Guanghai Zhao
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Kangtai Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Jian Xiao
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Hanwen Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Jiandong Niu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China
| | - Ning Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China.
| | - Quan Fang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, PR China.
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Nguyen T, Marusich J, Li JX, Zhang Y. Neuropeptide FF and Its Receptors: Therapeutic Applications and Ligand Development. J Med Chem 2020; 63:12387-12402. [PMID: 32673481 DOI: 10.1021/acs.jmedchem.0c00643] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The endogenous neuropeptide FF (NPFF) and its two cognate G protein-coupled receptors, Neuropeptide FF Receptors 1 and 2 (NPFFR1 and NPFFR2), represent a relatively new target system for many therapeutic applications including pain regulation, modulation of opioid side effects, drug reward, anxiety, cardiovascular conditions, and other peripheral effects. Since the cloning of NPFFR1 and NPFFR2 in 2000, significant progress has been made to understand their pharmacological roles and interactions with other receptor systems, notably the opioid receptors. A variety of NPFFR ligands with different mechanisms of action (agonists or antagonists) have been discovered although with limited subtype selectivities. Differential pharmacological effects have been observed for many of these NPFFR ligands, depending on assays/models employed and routes of administration. In this Perspective, we highlight the therapeutic potentials, current knowledge gaps, and latest updates of the development of peptidic and small molecule NPFFR ligands as tool compounds and therapeutic candidates.
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Affiliation(s)
- Thuy Nguyen
- Center for Drug Discovery, Research Triangle Institute, 3040 East Cornwallis Road, Research Triangle Park, North Carolina 27709, United States
| | - Julie Marusich
- Center for Drug Discovery, Research Triangle Institute, 3040 East Cornwallis Road, Research Triangle Park, North Carolina 27709, United States
| | - Jun-Xu Li
- Department of Pharmacology and Toxicology, University at Buffalo, the State University of New York, Buffalo, New York 14203, United States
| | - Yanan Zhang
- Center for Drug Discovery, Research Triangle Institute, 3040 East Cornwallis Road, Research Triangle Park, North Carolina 27709, United States
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Zhu H, Peng B, Klausen C, Yi Y, Li Y, Xiong S, von Dadelszen P, Leung PCK. NPFF increases fusogenic proteins syncytin 1 and syncytin 2 via GCM1 in first trimester primary human cytotrophoblast cells. FASEB J 2020; 34:9419-9432. [PMID: 32501590 DOI: 10.1096/fj.201902978r] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 03/25/2020] [Accepted: 05/04/2020] [Indexed: 01/22/2023]
Abstract
Neuropeptide FF (NPFF) is well-known for its roles in the central nervous system. Despite studies demonstrating that NPFF receptor 2 (NPFFR2) mRNA is highest in placenta, nothing is known about NPFF-NPFFR2 functions in placental development. Here, we investigated the effects of NPFF-NPFFR2 on expression of syncytial [human chorionic gonadotropin (hCG) β] and fusogenic [syncytin 1, syncytin 2, and glial cells missing 1 (GCM1)] genes in first trimester primary human cytotrophoblast cells. By analyzing two publicly available microarray data sets, we found that NPFF is consistently expressed throughout gestation whereas NPFFR2 increases in first trimester and is elevated in placenta samples from women with preeclampsia. Immunohistochemistry showed that NPFFR2, syncytin 1/2, and GCM1 each displayed unique patterns of expression among different trophoblast populations in first trimester placenta. Treatment of primary human cytotrophoblast cells with NPFF increased the mRNA and protein levels of hCG β, syncytin 1, syncytin 2, and GCM1; and knockdown of NPFFR2 abolished these effects. Interestingly, GCM1 mediated NPFF-induced upregulation of syncytin 1 and syncytin 2, but not hCG β, in primary human cytotrophoblasts. Our results demonstrate that NPFF acts via NPFFR2 to enhance production of hCG β and promote GCM1-dependent expression of syncytin 1 and 2 in human cytotrophoblasts.
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Affiliation(s)
- Hua Zhu
- Department of Obstetrics and Gynaecology, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Bo Peng
- Department of Obstetrics and Gynaecology, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Christian Klausen
- Department of Obstetrics and Gynaecology, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Yuyin Yi
- Department of Obstetrics and Gynaecology, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Yan Li
- Department of Obstetrics and Gynaecology, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Siyuan Xiong
- Department of Obstetrics and Gynaecology, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, Canada
| | | | - Peter C K Leung
- Department of Obstetrics and Gynaecology, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, Canada
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11
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Gutierrez-Mecinas M, Bell A, Polgár E, Watanabe M, Todd AJ. Expression of Neuropeptide FF Defines a Population of Excitatory Interneurons in the Superficial Dorsal Horn of the Mouse Spinal Cord that Respond to Noxious and Pruritic Stimuli. Neuroscience 2019; 416:281-293. [PMID: 31421202 PMCID: PMC6839401 DOI: 10.1016/j.neuroscience.2019.08.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 07/15/2019] [Accepted: 08/06/2019] [Indexed: 12/16/2022]
Abstract
The great majority of neurons in the superficial dorsal horn of the spinal cord are excitatory interneurons, and these are required for the normal perception of pain and itch. We have previously identified 5 largely non-overlapping populations among these cells, based on the expression of four different neuropeptides (cholecystokinin, neurotensin, neurokinin B and substance P) and of green fluorescent protein driven by the promoter for gastrin-releasing peptide (GRP) in a transgenic mouse line. Another peptide (neuropeptide FF, NPFF) has been identified among the excitatory neurons, and here we have used an antibody against the NPFF precursor (pro-NPFF) and a probe that recognises Npff mRNA to identify and characterise these cells. We show that they are all excitatory interneurons, and are separate from the five populations listed above, accounting for ~ 6% of the excitatory neurons in laminae I-II. By examining phosphorylation of extracellular signal-regulated kinases, we show that the NPFF cells can respond to different types of noxious and pruritic stimulus. Ablation of somatostatin-expressing dorsal horn neurons has been shown to result in a dramatic reduction in mechanical pain sensitivity, while somatostatin released from these neurons is thought to contribute to itch. Since the great majority of the NPFF cells co-expressed somatostatin, these cells may play a role in the perception of pain and itch. NPFF is expressed by around 6% of the excitatory interneurons in the superficial dorsal horn of the mouse spinal cord. NPFF cells differ from those that express substance P, cholecystokinin, neurotensin or neurokinin B. Although some NPFF cells express gastrin-releasing peptide (GRP), they do not express GFP in a GRP-GFP mouse line. Some NPFF cells are activated by noxious or pruritic stimuli.
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Affiliation(s)
- Maria Gutierrez-Mecinas
- Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Andrew Bell
- Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Erika Polgár
- Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Masahiko Watanabe
- Department of Anatomy, Hokkaido University School of Medicine, Sapporo 060-8638, Japan
| | - Andrew J Todd
- Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK.
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12
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Malin DH, Henceroth MM, Elayoubi J, Campbell JR, Anderson A, Goyarzu P, Izygon J, Madison CA, Ward CP, Burstein ES. A subtype-specific neuropeptide FF receptor antagonist attenuates morphine and nicotine withdrawal syndrome in the rat. Neurosci Lett 2018; 684:98-103. [DOI: 10.1016/j.neulet.2018.06.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 06/21/2018] [Accepted: 06/28/2018] [Indexed: 02/01/2023]
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13
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Abdellah N, van Remoortel S, Mohey-Elsaeed O, Mustafa MN, Ahmed YA, Timmermans JP, Buckinx R. Neuropeptide AF Induces Piecemeal Degranulation in Murine Mucosal Mast Cells: A New Mediator in Neuro-Immune Communication in the Intestinal Lamina Propria? Anat Rec (Hoboken) 2018; 301:1103-1114. [DOI: 10.1002/ar.23780] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/25/2017] [Accepted: 12/11/2017] [Indexed: 12/30/2022]
Affiliation(s)
- Nada Abdellah
- Histology Department, Faculty of Veterinary Medicine; Sohag University; Sohag Egypt
- Laboratory of Cell Biology & Histology, University of Antwerp; Antwerp Belgium
| | | | - Omnia Mohey-Elsaeed
- Laboratory of Cell Biology & Histology, University of Antwerp; Antwerp Belgium
- Department of Cytology and Histology, Faculty of Veterinary Medicine; Cairo University; Giza 12122 Egypt
| | - Mohamed-Nabil Mustafa
- Department of Anatomy and Histology, Faculty of Veterinary Medicine; Assiut University; Assiut Egypt
| | - Yasser A. Ahmed
- Department of Histology, Faculty of Veterinary Medicine; South Valley University; Qena Egypt
| | | | - Roeland Buckinx
- Laboratory of Cell Biology & Histology, University of Antwerp; Antwerp Belgium
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14
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Nguyen T, Decker AM, Langston TL, Mathews KM, Siemian JN, Li JX, Harris DL, Runyon SP, Zhang Y. Discovery of Novel Proline-Based Neuropeptide FF Receptor Antagonists. ACS Chem Neurosci 2017; 8:2290-2308. [PMID: 28737888 DOI: 10.1021/acschemneuro.7b00219] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The neuropeptide FF (NPFF) system has been implicated in a number of physiological processes including modulating the pharmacological activity of opioid analgesics and several other classes of drugs of abuse. In this study, we report the discovery of a novel proline scaffold with antagonistic activity at the NPFF receptors through a high throughput screening campaign using a functional calcium mobilization assay. Focused structure-activity relationship studies on the initial hit 1 have resulted in several analogs with calcium mobilization potencies in the submicromolar range and modest selectivity for the NPFF1 receptor. Affinities and potencies of these compounds were confirmed in radioligand binding and functional cAMP assays. Two compounds, 16 and 33, had good solubility and blood-brain barrier permeability that fall within the range of CNS permeant candidates without the liability of being a P-glycoprotein substrate. Finally, both compounds reversed fentanyl-induced hyperalgesia in rats when administered intraperitoneally. Together, these results point to the potential of these proline analogs as promising NPFF receptor antagonists.
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Affiliation(s)
- Thuy Nguyen
- Research Triangle Institute, Research Triangle Park, North Carolina 27709, United States
| | - Ann M. Decker
- Research Triangle Institute, Research Triangle Park, North Carolina 27709, United States
| | - Tiffany L. Langston
- Research Triangle Institute, Research Triangle Park, North Carolina 27709, United States
| | - Kelly M. Mathews
- Research Triangle Institute, Research Triangle Park, North Carolina 27709, United States
| | - Justin N. Siemian
- Department of Pharmacology and Toxicology, University at Buffalo, the State University of New York, Buffalo, New York 14214, United States
| | - Jun-Xu Li
- Department of Pharmacology and Toxicology, University at Buffalo, the State University of New York, Buffalo, New York 14214, United States
| | - Danni L. Harris
- Research Triangle Institute, Research Triangle Park, North Carolina 27709, United States
| | - Scott P. Runyon
- Research Triangle Institute, Research Triangle Park, North Carolina 27709, United States
| | - Yanan Zhang
- Research Triangle Institute, Research Triangle Park, North Carolina 27709, United States
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15
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Zhang R, Xu B, Zhang MN, Zhang T, Wang ZL, Zhao G, Zhao GH, Li N, Fang Q, Wang R. Peripheral and central sites of action for anti-allodynic activity induced by the bifunctional opioid/NPFF receptors agonist BN-9 in inflammatory pain model. Eur J Pharmacol 2017; 813:122-129. [DOI: 10.1016/j.ejphar.2017.07.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 07/04/2017] [Accepted: 07/26/2017] [Indexed: 10/19/2022]
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16
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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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17
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Wang ZL, Pan JX, Song JJ, Tang HH, Yu HP, Li XH, Li N, Zhang T, Zhang R, Zhang MN, Xu B, Fang Q, Wang R. Structure-Based Optimization of Multifunctional Agonists for Opioid and Neuropeptide FF Receptors with Potent Nontolerance Forming Analgesic Activities. J Med Chem 2016; 59:10198-10208. [PMID: 27798836 DOI: 10.1021/acs.jmedchem.6b01181] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Zi-Long Wang
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Jia-Xin Pan
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Jing-Jing Song
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Hong-Hai Tang
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Hong-Ping Yu
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Xu-Hui Li
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Ning Li
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Ting Zhang
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Run Zhang
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Meng-Na Zhang
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Biao Xu
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Quan Fang
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
| | - Rui Wang
- Key Laboratory of Preclinical
Study for New Drugs of Gansu Province, and Institute of Physiology,
School of Basic Medical Sciences, Lanzhou University, 199 Donggang
West Road, Lanzhou, 730000, PR China
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18
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Buffel I, Meurs A, Portelli J, Raedt R, De Herdt V, Poppe L, De Meulenaere V, Wadman W, Bihel F, Schmitt M, Vonck K, Bourguignon JJ, Simonin F, Smolders I, Boon P. The effect of neuropeptide FF in the amygdala kindling model. Acta Neurol Scand 2016; 134:181-8. [PMID: 26503695 DOI: 10.1111/ane.12526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2015] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Neuropeptide FF (NPFF) and its receptors (NPFF1 R and NPFF2 R) are differentially distributed throughout the central nervous system. NPFF reduces cortical excitability in rats when administered intracerebroventricularly (i.c.v.), and both NPFF and NPFF1 R antagonists attenuate pilocarpine-induced limbic seizures. In this study, our aim was to determine whether NPFF exerts anticonvulsant or anti-epileptogenic effects in the rat amygdala kindling model for temporal lobe seizures. METHODS Male Wistar rats were implanted with a recording/stimulation electrode in the right amygdala and a cannula in the left lateral ventricle. In a first group of animals, the afterdischarge threshold (ADT) was determined after a single i.c.v. infusion of saline (n = 8) or NPFF (1 nmol/h for 2 h; n = 10). Subsequently, daily infusion of saline (n = 8) or NPFF (1 nmol/h for 2 h; i.c.v.; n = 9) was performed, followed by a kindling stimulus (ADT+200 μA). Afterdischarge duration and seizure severity were evaluated after every kindling stimulus. A second group of rats (n = 7) were fully kindled, and the effect of saline or a high dose of NPFF (10 nmol/h for 2 h, i.c.v.) on ADT and the generalized seizure threshold (GST) was subsequently determined. RESULTS In naive rats, NPFF significantly increased the ADT compared to control (435 ± 72 μA vs 131 ± 23 μA [P < 0.05]). When rats underwent daily stimulations above the ADT, NPFF did not delay or prevent kindling acquisition. Furthermore, a high dose of NPFF did not alter ADT or GST in fully kindled rats. CONCLUSIONS I.c.v. administration of NPFF reduced excitability in the amygdala in naive, but not in fully kindled rats, and had no effect on kindling acquisition.
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Affiliation(s)
- I. Buffel
- Laboratory for Clinical and Experimental Neurophysiology; Neurobiology and Neuropsychology; Department of Neurology; Ghent University; Ghent University Hospital; Ghent Belgium
| | - A. Meurs
- Laboratory for Clinical and Experimental Neurophysiology; Neurobiology and Neuropsychology; Department of Neurology; Ghent University; Ghent University Hospital; Ghent Belgium
| | - J. Portelli
- Laboratory for Clinical and Experimental Neurophysiology; Neurobiology and Neuropsychology; Department of Neurology; Ghent University; Ghent University Hospital; Ghent Belgium
- Center for Neurosciences; Department of Pharmaceutical Chemistry; Drug Analysis & Drug information; University of Brussels; Brussels Belgium
| | - R. Raedt
- Laboratory for Clinical and Experimental Neurophysiology; Neurobiology and Neuropsychology; Department of Neurology; Ghent University; Ghent University Hospital; Ghent Belgium
| | - V. De Herdt
- Laboratory for Clinical and Experimental Neurophysiology; Neurobiology and Neuropsychology; Department of Neurology; Ghent University; Ghent University Hospital; Ghent Belgium
| | - L. Poppe
- Laboratory for Clinical and Experimental Neurophysiology; Neurobiology and Neuropsychology; Department of Neurology; Ghent University; Ghent University Hospital; Ghent Belgium
| | - V. De Meulenaere
- Laboratory for Clinical and Experimental Neurophysiology; Neurobiology and Neuropsychology; Department of Neurology; Ghent University; Ghent University Hospital; Ghent Belgium
| | - W. Wadman
- Swammerdam Institute of Life Sciences; Department of Neurobiology; University of Amsterdam; Amsterdam The Netherlands
| | - F. Bihel
- Therapeuthic Innovation Laboratory; Faculty of Pharmacy; UMR 7200; CNRS; University of Strasbourg; Illkirch Graffenstaden France
| | - M. Schmitt
- Therapeuthic Innovation Laboratory; Faculty of Pharmacy; UMR 7200; CNRS; University of Strasbourg; Illkirch Graffenstaden France
| | - K. Vonck
- Laboratory for Clinical and Experimental Neurophysiology; Neurobiology and Neuropsychology; Department of Neurology; Ghent University; Ghent University Hospital; Ghent Belgium
| | - J.-J. Bourguignon
- Therapeuthic Innovation Laboratory; Faculty of Pharmacy; UMR 7200; CNRS; University of Strasbourg; Illkirch Graffenstaden France
| | - F. Simonin
- Research Institute of ESBS; CNRS; UMR7242; University of Strasbourg; Illkirch France
| | - I. Smolders
- Center for Neurosciences; Department of Pharmaceutical Chemistry; Drug Analysis & Drug information; University of Brussels; Brussels Belgium
| | - P. Boon
- Laboratory for Clinical and Experimental Neurophysiology; Neurobiology and Neuropsychology; Department of Neurology; Ghent University; Ghent University Hospital; Ghent Belgium
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19
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Wang ZL, Li N, Wang P, Tang HH, Han ZL, Song JJ, Li XH, Yu HP, Zhang T, Zhang R, Xu B, Zhang MN, Fang Q, Wang R. Pharmacological characterization of EN-9, a novel chimeric peptide of endomorphin-2 and neuropeptide FF that produces potent antinociceptive activity and limited tolerance. Neuropharmacology 2016; 108:364-72. [DOI: 10.1016/j.neuropharm.2016.03.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 03/08/2016] [Accepted: 03/08/2016] [Indexed: 01/19/2023]
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20
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Li N, Han ZL, Wang ZL, Xing YH, Sun YL, Li XH, Song JJ, Zhang T, Zhang R, Zhang MN, Xu B, Fang Q, Wang R. BN-9, a chimeric peptide with mixed opioid and neuropeptide FF receptor agonistic properties, produces nontolerance-forming antinociception in mice. Br J Pharmacol 2016; 173:1864-80. [PMID: 27018797 DOI: 10.1111/bph.13489] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 03/16/2016] [Accepted: 03/22/2016] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND AND PURPOSE Neuropeptide FF (NPFF) behaves as an endogenous opioid-modulating peptide. In the present study, the opioid and NPFF pharmacophore-containing chimeric peptide BN-9 was synthesized and pharmacologically characterized. EXPERIMENTAL APPROACH Agonist activities of BN-9 at opioid and NPFF receptors were characterized in in vitro cAMP assays. Antinociceptive activities of BN-9 were evaluated in the mouse tail-flick and formalin tests. Furthermore, its side effects were investigated in rotarod, antinociceptive tolerance, reward and gastrointestinal transit tests. KEY RESULTS BN-9 acted as a novel multifunctional agonist at μ, δ, κ, NPFF1 and NPFF2 receptors in cAMP assays. In the tail-flick test, BN-9 produced dose-related antinociception and was approximately equipotent to morphine; this antinociception was blocked by μ and κ receptor antagonists, but not by the δ receptor antagonist. In the formalin test, supraspinal administration of BN-9 produced significant analgesia. Notably, repeated administration of BN-9 produced analgesia without loss of potency over 8 days. In contrast, repeated i.c.v. co-administration of BN-9 with the NPFF receptor antagonist RF9 produced significant antinociceptive tolerance. Furthermore, i.c.v. BN-9 induced conditioned place preference. When given by the same routes, BN-9 had a more than eightfold higher ED50 value for gastrointestinal transit inhibition compared with the ED50 values for antinociception. CONCLUSIONS AND IMPLICATIONS BN-9 produced a robust, nontolerance-forming analgesia with limited inhibition of gastrointestinal transit. As BN-9 is able to activate both opioid and NPFF systems, this provides an interesting approach for the development of novel analgesics with minimal side effects.
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Affiliation(s)
- Ning Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Zheng-Lan Han
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Zi-Long Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Yan-Hong Xing
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Yu-Long Sun
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Xu-Hui Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Jing-Jing Song
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Ting Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Run Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Meng-Na Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Biao Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Quan Fang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
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Mudgal A, Kumar K, Mollereau C, Pasha S. NPYFa, A Chimeric Peptide of Met-Enkephalin, and NPFF Induces Tolerance-Free Analgesia. Chem Biol Drug Des 2016; 87:885-94. [DOI: 10.1111/cbdd.12721] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 11/30/2015] [Accepted: 12/30/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Annu Mudgal
- Peptide Synthesis Laboratory; CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB); New Delhi India
- Academy of Scientific and Innovative Research (AcSIR); CSIR-IGIB Campus; New Delhi India
| | - Krishan Kumar
- Peptide Synthesis Laboratory; CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB); New Delhi India
- Department of Chemistry; Motilal Nehru College; University of Delhi; Delhi 110021 India
| | - Catherine Mollereau
- Institut de Pharmacologie et Biologie Structurale; Toulouse Cedex France
- Laboratoire Anthropologie Moléculaire et Imagerie de Synthèse; Toulouse Cedex France
| | - Santosh Pasha
- Peptide Synthesis Laboratory; CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB); New Delhi India
- Academy of Scientific and Innovative Research (AcSIR); CSIR-IGIB Campus; New Delhi India
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22
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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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Reversal of morphine tolerance by a compound with NPFF receptor subtype-selective actions. Neurosci Lett 2015; 584:141-5. [DOI: 10.1016/j.neulet.2014.10.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 10/08/2014] [Accepted: 10/09/2014] [Indexed: 01/28/2023]
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Journigan VB, Mésangeau C, Vyas N, Eans SO, Cutler SJ, McLaughlin JP, Mollereau C, McCurdy CR. Nonpeptide small molecule agonist and antagonist original leads for neuropeptide FF1 and FF2 receptors. J Med Chem 2014; 57:8903-27. [PMID: 25268943 PMCID: PMC4234442 DOI: 10.1021/jm500989n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Neuropeptide FF1 and FF2 receptors (NPFF1-R and NPFF2-R), and their endogenous ligand NPFF, are one of only several systems responsible for mediating opioid-induced hyperalgesia, tolerance, and dependence. Currently, no small molecules displaying good affinity or selectivity for either subtype have been reported, to decipher the role of NPFF2-R as it relates to opioid-mediated analgesia, for further exploration of NPFF1-R, or for medication development for either subtype. We report the first nonpeptide small molecule scaffold for NPFF1,2-R, the guanidino-piperidines, and SAR studies resulting in the discovery of a NPFF1 agonist (7b, K(i) = 487 ± 117 nM), a NPFF1 antagonist (46, K(i) = 81 ± 17 nM), and a NPFF2 partial antagonist (53a, K(i) = 30 ± 5 nM), which serve as leads for the development of pharmacological probes and potential therapeutic agents. Testing of 46 alone was without effect in the mouse 48 °C warm-water tail-withdrawal test, but pretreatment with 46 prevented NPFF-induced hyperalgesia.
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Affiliation(s)
- V Blair Journigan
- Department of BioMolecular Sciences, School of Pharmacy, The University of Mississippi , University, Mississippi 38677, United States
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Wang ZL, Fang Q, Han ZL, Pan JX, Li XH, Li N, Tang HH, Wang P, Zheng T, Chang XM, Wang R. Opposite effects of neuropeptide FF on central antinociception induced by endomorphin-1 and endomorphin-2 in mice. PLoS One 2014; 9:e103773. [PMID: 25090615 PMCID: PMC4121275 DOI: 10.1371/journal.pone.0103773] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 07/02/2014] [Indexed: 11/18/2022] Open
Abstract
Neuropeptide FF (NPFF) is known to be an endogenous opioid-modulating peptide. Nevertheless, very few researches focused on the interaction between NPFF and endogenous opioid peptides. In the present study, we have investigated the effects of NPFF system on the supraspinal antinociceptive effects induced by the endogenous µ-opioid receptor agonists, endomorphin-1 (EM-1) and endomorphin-2 (EM-2). In the mouse tail-flick assay, intracerebroventricular injection of EM-1 induced antinociception via µ-opioid receptor while the antinociception of intracerebroventricular injected EM-2 was mediated by both µ- and κ-opioid receptors. In addition, central administration of NPFF significantly reduced EM-1-induced central antinociception, but enhanced EM-2-induced central antinociception. The results using the selective NPFF1 and NPFF2 receptor agonists indicated that the EM-1-modulating action of NPFF was mainly mediated by NPFF2 receptor, while NPFF potentiated EM-2-induecd antinociception via both NPFF1 and NPFF2 receptors. To further investigate the roles of µ- and κ-opioid systems in the opposite effects of NPFF on central antinociception of endomprphins, the µ- and κ-opioid receptors selective agonists DAMGO and U69593, respectively, were used. Our results showed that NPFF could reduce the central antinociception of DAMGO via NPFF2 receptor and enhance the central antinociception of U69593 via both NPFF1 and NPFF2 receptors. Taken together, our data demonstrate that NPFF exerts opposite effects on central antinociception of endomorphins and provide the first evidence that NPFF potentiate antinociception of EM-2, which might result from the interaction between NPFF and κ-opioid systems.
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Affiliation(s)
- Zi-long Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Quan Fang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Zheng-lan Han
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Jia-xin Pan
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Xu-hui Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Ning Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Hong-hai Tang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Pei Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Ting Zheng
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Xue-mei Chang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, PR China
- * E-mail:
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Sun YL, Zhang XY, He N, Sun T, Zhuang Y, Fang Q, Wang KR, Wang R. Neuropeptide FF activates ERK and NF kappa B signal pathways in differentiated SH-SY5Y cells. Peptides 2012; 38:110-7. [PMID: 22981806 DOI: 10.1016/j.peptides.2012.08.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 08/30/2012] [Accepted: 08/30/2012] [Indexed: 12/27/2022]
Abstract
Neuropeptide FF (NPFF) has been reported to play important roles in regulating diverse biological processes. However, little attention has been focused on the downstream signal transduction pathway of NPFF. Here, we used the differentiated neuroblastoma cell line, dSH-SY5Y, which endogenously expresses hNPFF2 receptor, to investigate the signal transduction downstream of NPFF. In particular we investigated the regulation of the extracellular signal-regulated protein kinase (ERK) and the nuclear factor kappa B (NF-κB) pathways by NPFF in these cells. NPFF rapidly and transiently stimulated ERK. H89, a selective inhibitor of cyclic AMP-dependent protein kinase A (PKA), inhibited the NPFF-activated ERK pathway, indicating the involvement of PKA in the NPFF-induced ERK activation. Down-regulation of nitric oxide synthases also attenuated NPFF-induced ERK activation, suggesting that a nitric oxide synthase-dependent pathway is involved. Moreover, the core upstream components of the NF-κB pathway were also significantly activated in response to NPFF, suggesting that the NF-κB pathway is involved in the signal transduction pathway of NPFF. Collectively, these data demonstrate that nitric oxide synthases are involved in the signal transduction pathway of NPFF, and provide the first evidence for the interaction between NPFF and the NF-κB pathway. These advances in our interpretation of the NPFF pathway mechanism will aid the comprehensive understanding of its function and provide novel molecular insight for further study of the NPFF system.
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Affiliation(s)
- Yu-long Sun
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, PR China
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Li M, Zhou L, Ma G, Dong S. Analgesic properties of chimeric peptide based on morphiceptin and PFRTic-amide. ACTA ACUST UNITED AC 2012; 179:23-8. [DOI: 10.1016/j.regpep.2012.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2012] [Revised: 06/29/2012] [Accepted: 08/27/2012] [Indexed: 11/29/2022]
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Kotlinska JH, Gibula-Bruzda E, Suder P, Wasielak M, Bray L, Raoof H, Bodzon-Kulakowska A, Silberring J. Crypteins derived from the mouse neuropeptide FF (NPFF)A precursor display NPFF-like effects in nociceptive tests in mice. Peptides 2012; 36:17-22. [PMID: 22580381 DOI: 10.1016/j.peptides.2012.04.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 04/25/2012] [Accepted: 04/25/2012] [Indexed: 12/11/2022]
Abstract
NPFF precursor, pro-NPFF(A) contains three known bioactive sequences: NPFF (FLFQPQRF-NH(2)), neuropeptide AF (NPAF; AGEGLSSPFWSLAAPQRF-NH(2)) and neuropeptide SF (NPSF; SLAAPQRF-NH(2)). The key-feature of these fragments is their common PQRF-amidated sequence at their C termini. Here, we evaluated the biological activity of two other sequences derived from the mouse NPFF(A) precursor, that does not have PQRF-amidated C-terminus. One peptide was residing between positions 85 and 99 in the mice pro-NPFF(A). This peptide was referred to as neuropeptide SA (NPSA; SAWGSWSKEQLNPQA), assigned due to its flanking amino acids. Another sequence used in the experiments was N-terminal fragment of NPSA, here referred to as neuropeptide SS (NPSS; SAWGSWS). These two peptides, classified as crypteins, were synthesized and tested in the hot-plate and tail immersion tests in mice for their pharmacological activity in morphine-induced antinociception. The effects of both crypteins were compared to NPFF. Our experiments indicated that both crypteins inhibited morphine antinociception and their effects were reversed by RF9, an antagonist of NPFF receptors. These data show that NPSA and NPSS possess NPFF-like anti-opioid activity in these behavioral tests.
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Affiliation(s)
- Jolanta H Kotlinska
- Department of Pharmacology and Pharmacodynamics, Medical University, Lublin, Poland.
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Findeisen M, Rathmann D, Beck-Sickinger AG. RFamide Peptides: Structure, Function, Mechanisms and Pharmaceutical Potential. Pharmaceuticals (Basel) 2011. [PMCID: PMC4058657 DOI: 10.3390/ph4091248] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Different neuropeptides, all containing a common carboxy-terminal RFamide sequence, have been characterized as ligands of the RFamide peptide receptor family. Currently, five subgroups have been characterized with respect to their N-terminal sequence and hence cover a wide pattern of biological functions, like important neuroendocrine, behavioral, sensory and automatic functions. The RFamide peptide receptor family represents a multiligand/multireceptor system, as many ligands are recognized by several GPCR subtypes within one family. Multireceptor systems are often susceptible to cross-reactions, as their numerous ligands are frequently closely related. In this review we focus on recent results in the field of structure-activity studies as well as mutational exploration of crucial positions within this GPCR system. The review summarizes the reported peptide analogs and recently developed small molecule ligands (agonists and antagonists) to highlight the current understanding of the pharmacophoric elements, required for affinity and activity at the receptor family. Furthermore, we address the biological functions of the ligands and give an overview on their involvement in physiological processes. We provide insights in the knowledge for the design of highly selective ligands for single receptor subtypes to minimize cross-talk and to eliminate effects from interactions within the GPCR system. This will support the drug development of members of the RFamide family.
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Findeisen M, Rathmann D, Beck-Sickinger AG. Structure-activity studies of RFamide peptides reveal subtype-selective activation of neuropeptide FF1 and FF2 receptors. ChemMedChem 2011; 6:1081-93. [PMID: 21548099 DOI: 10.1002/cmdc.201100089] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2011] [Revised: 03/19/2011] [Indexed: 12/18/2022]
Abstract
Selectivity is a major issue in closely related multiligand/multireceptor systems. In this study we investigated the RFamide systems of hNPFF₁R and hNPFF₂R that bind the endogenous peptide hormones NPFF, NPAF, NPVF, and NPSF. By use of a systematic approach, we characterized the role of the C-terminal dipeptide with respect to agonistic properties using synthesized [Xaa 7]NPFF and [Xaa 8]NPFF analogues. We were able to identify only slight differences in potency upon changing the position of Arg 7, as all modifications resulted in identical behavior at the NPFF₁R and NPFF₂R. However, the C-terminal Phe 8 was able to be replaced by Trp or His with only a minor loss in potency at the NPFF₂R relative to the NPFF₁R. Analogues with shorter side chains, such as α-amino-4-guanidino butyric acid ([Agb 7]NPFF) or phenylglycine ([Phg 8]NPFF), decreased efficacy for the NPFF₁ R to 25-31 % of the maximal response, suggesting that these agonist-receptor complexes are more susceptible to structural modifications. In contrast, mutations to the conserved Asp 6.59 residue in the third extracellular loop of both receptors revealed a higher sensitivity toward the hNPFF₂R receptor than toward hNPFF₁R. These data provide new insight into the subtype-specific agonistic activation of the NPFF₁ and NPFF(2) receptors that are necessary for the development of selective agonists.
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Affiliation(s)
- Maria Findeisen
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, Leipzig University, Brüderstraße 34, 04103 Leipzig, Germany
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31
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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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32
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Iijima N, Takumi K, Sawai N, Ozawa H. An Immunohistochemical Study on the Expressional Dynamics of Kisspeptin Neurons Relevant to GnRH Neurons Using a Newly Developed Anti-kisspeptin Antibody. J Mol Neurosci 2010; 43:146-54. [DOI: 10.1007/s12031-010-9433-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2010] [Accepted: 07/07/2010] [Indexed: 10/19/2022]
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Wu CH, Tao PL, Huang EYK. Distribution of neuropeptide FF (NPFF) receptors in correlation with morphine-induced reward in the rat brain. Peptides 2010; 31:1374-82. [PMID: 20381562 DOI: 10.1016/j.peptides.2010.03.036] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 03/31/2010] [Accepted: 03/31/2010] [Indexed: 11/29/2022]
Abstract
Neuropeptide FF (NPFF) exhibited anti-/pro-opioid effects when centrally injected. It was proved to bind to its own receptors, namely NPFF(1) and NPFF(2) receptors, but did not bind to opioid receptors. In our previous study, we found that i.c.v. injected NPFF suppressed morphine-induced conditioned place preference (CPP) in rats, which indicated that NPFF may play a role in the modulation of morphine-induced reward. In the present study, we further investigated the action site of NPFF to attenuate morphine-induced reward. Bilateral intra-VTA (ventral tegmental area) and intra-NAc (nucleus accumbens) injections of NPFF both blocked the CPP caused by morphine in rats. This suggests that NPFF may act at both VTA and NAc to inhibit the sensitization of the mesocorticolimbic dopaminergic pathway. Neurochemical analyses support that NPFF could be acting through the inhibition of the mesocorticolimbic dopaminergic activity increased by morphine. We also determined the distribution of NPFF receptors in rat brains. Our results showed that both NPFF receptors were abundantly expressed in VTA but with less content in NAc. In fluorescent immunohistochemical staining, our results revealed that NPFF(1) and NPFF(2) receptors could be expressed at the TH (tyrosine hydroxylase)- or GAD67 (glutamic acid decarboxylase-67)-positive neurons in VTA, whereas some of them were present in the negative neurons. This implied a possible function of NPFF to modulate dopaminergic neurons directly and a possible indirect action of NPFF on GABAergic neurons to modulate dopamine release. Taken together, our study should be helpful for clarifying the possible mechanisms of NPFF system to modulate morphine-induced reward.
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Affiliation(s)
- Chun-Hung Wu
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan, ROC
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Vats ID, Chaudhary S, Sharma A, Nath M, Pasha S. Rationally designed chimeric peptide of met-enkephalin and FMRFa-[D-Ala2, p-Cl-Phe4]YFa induce multiple opioid receptors mediated antinociception and up-regulate their expression. Eur J Pharmacol 2010; 638:54-60. [DOI: 10.1016/j.ejphar.2010.02.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2009] [Revised: 02/02/2010] [Accepted: 02/24/2010] [Indexed: 10/19/2022]
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35
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Vats ID, Snehlata, Nath M, Pasha MAQ, Pasha S. Effect of chronic intra-peritoneally administered chimeric peptide of met-enkephalin and FMRFa-[D-Ala2]YFa-on antinociception and opioid receptor regulation. Eur J Pain 2009; 14:295.e1-9. [PMID: 19560378 DOI: 10.1016/j.ejpain.2009.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2009] [Revised: 05/16/2009] [Accepted: 05/23/2009] [Indexed: 11/29/2022]
Abstract
The physiological role of NPFF/FMRFa family of peptides is complex and exact mechanism of action of these peptides is not yet completely understood. In same line of scrutiny, previously we reported an enzymatically stable chimeric analog of YGGFMKKKFMRFamide (YFa) i.e., [D-Ala(2)]YAGFMKKKFMRFamide ([D-Ala(2)]YFa) which have a role in antinociception and modulatory effect on opioid analgesia. In continuation, presently we investigated using tail-flick test whether [D-Ala(2)]YFa on systemic administration induced any antinociception in rats and if so then which specific opioid receptor(s) mu, delta or kappa mediated it. Further, the antinociceptive effect of [D-Ala(2)]YFa on 6 days chronic intra-peritoneal (i.p.) treatment in rats was examined and finally, effect of this chronic treatment on the differential expression of opioid receptors was assessed. [D-Ala(2)]YFa on i.p. administration induced dose dependent antinociception which was mainly mediated by delta (DOR) and partially by mu (MOR) and kappa (KOR) opioid receptors. Moreover, its antinociceptive effect remained comparable throughout the chronic treatment even during insufficient availability of DOR1. Importantly, during this treatment the mRNA expression of all three opioid receptors (MOR1, KOR1 and DOR1) was increased as assessed by real-time RTPCR though subsequent western blot analysis revealed a selective increase in the protein level of DOR1, only. Thus, pharmacological behavior of [d-Ala(2)]YFa suggests that competency of an opioid agonist to bind with multiple opioid receptors may enhance its potency to induce tolerance free analgesia.
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Affiliation(s)
- Ishwar Dutt Vats
- Peptide Synthesis Laboratory, Institute of Genomics and Integrative Biology, Delhi, India
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36
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Gupta K, Vats ID, Gupta YK, Saleem K, Pasha S. Lack of tolerance and morphine-induced cross-tolerance to the analgesia of chimeric peptide of Met-enkephalin and FMRFa. Peptides 2008; 29:2266-75. [PMID: 18930087 DOI: 10.1016/j.peptides.2008.09.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Revised: 09/18/2008] [Accepted: 09/18/2008] [Indexed: 12/20/2022]
Abstract
Chimeric peptide of Met-enkephalin and FMRFa (YGGFMKKKFMRFa-YFa), a kappa-opioid receptor specific peptide, did not induce tolerance and cross-tolerance effects to its analgesic action on day 5 after pretreatment with either YFa or morphine for 4 days. However, pretreatment with YFa for 4 days led to the development of cross-tolerance to the analgesic effects of morphine and also 4 days of pretreatment of morphine resulted in the expression of tolerance to its own analgesic effects. Similar expression of tolerance and cross-tolerance were also observed when YFa was compared with the kappa receptor agonist peptide dynorphin A(1-13) [DynA(1-13)]. Cross-tolerance effects between YFa and DynA(1-13) analgesia were also not observed on day 5. Interestingly, when YFa and DynA(1-13) were tested for their analgesic effects for 5 days, reduction in analgesia on day 3 was observed in case of DynA(1-13) whereas YFa maintained its analgesia for 5 days. Thus, chimeric peptide YFa may serve as a useful probe to understand pain modulation and expression of tolerance and cross-tolerance behavior with other opioids.
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Affiliation(s)
- Kshitij Gupta
- Peptide Synthesis Laboratory, Institute of Genomics and Integrative Biology, Mall Road, Delhi 110007, India
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37
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Muñoz M, Smeets W, López J, Moreno N, Morona R, Domínguez L, González A. Immunohistochemical localization of neuropeptide FF-like in the brain of the turtle: Relation to catecholaminergic structures. Brain Res Bull 2008; 75:256-60. [DOI: 10.1016/j.brainresbull.2007.10.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2007] [Accepted: 10/17/2007] [Indexed: 10/22/2022]
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38
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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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39
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Kotlinska J, Pachuta A, Dylag T, Silberring J. Neuropeptide FF (NPFF) reduces the expression of morphine- but not of ethanol-induced conditioned place preference in rats. Peptides 2007; 28:2235-42. [PMID: 17884254 DOI: 10.1016/j.peptides.2007.08.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2007] [Revised: 08/10/2007] [Accepted: 08/10/2007] [Indexed: 10/22/2022]
Abstract
Neuropeptide FF (NPFF) has been described as an anti-opioid peptide. It plays a role in opioid antinociception, dependence and tolerance. Previous study has indicated that 1DMe ([D-Tyr(1), (NMe)Phe(3)]NPFF), a stable analog of NPFF, inhibits acquisition of the rewarding effect of morphine but not of ethanol in mice. The rewarding effects of these drugs were measured in the unbiased paradigm of conditioned place preference (CPP). The present study examines the influence of NPFF on the expression of morphine- and ethanol-induced CPP in the biased procedure in rats. Our experiments showed that NPFF, given intracerebroventricularly (i.c.v.) at the doses of 5, 10 and 20 nmol, inhibited the expression of morphine-induced CPP. NPFF gave itself, neither induced place preference nor aversion, although a tendency to aversive effect was seen at the highest dose of 20 nmol. NPFF did not indicate fear behavior in the elevated plus maze test, and did not disturb locomotor activity of rats. However, NPFF was unable to inhibit the expression of ethanol-induced CPP. Probably this effect is due to the fact that ethanol reward is a more complex process and apart from the role of opioids, there are other neurotransmitters also involved in this mechanism. These results suggest that NPFF is involved in the expression of morphine reward. Moreover, our study supports an anti-opioid character of this peptide.
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Affiliation(s)
- Jolanta Kotlinska
- Department of Pharmacology and Pharmacodynamics, Medical University School, Staszica 4, 20-081 Lublin, Poland.
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40
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Greenwood K, Williams T, Geary T. Nematode neuropeptide receptors and their development as anthelmintic screens. Parasitology 2007; 131 Suppl:S169-77. [PMID: 16569288 DOI: 10.1017/s003118200500819x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This review addresses the potential use of neuropeptide receptors for the discovery of anthelmintic agents, and particularly for the identification of non-peptide ligands. It outlines which nematode neuropeptides are known and have been characterized, the published information on drug discovery around these targets, information about existing high- and low-throughput screening systems and finally the likely safety of neuropeptide mimetics.
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Affiliation(s)
- K Greenwood
- Pfizer Animal Health, Ramsgate Road, Sandwich, Kent CT13 9NJ.
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41
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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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Pryor SC, Nieto F, Henry S, Sarfo J. The effect of opiates and opiate antagonists on heat latency response in the parasitic nematode Ascaris suum. Life Sci 2007; 80:1650-5. [PMID: 17363006 DOI: 10.1016/j.lfs.2007.01.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2006] [Revised: 01/03/2007] [Accepted: 01/06/2007] [Indexed: 11/30/2022]
Abstract
The effects of the opiates morphine and morphine-6-glucuronide (M6G), the mu opioid receptor specific antagonist D-Phe-Cys-Tyr-D-Trp-Om-Thr-Pen-Thr-NH(2) (CTOP), and the general opiate antagonist naloxone on the latency of response to thermal stimulation were determined in the parasitic nematode Ascaris suum. Thermal detection and avoidance behaviors of the worms were evaluated with a tail flick analgesia meter using a modification of a technique employed for nociception experiments in rodents. Morphine and M6G were shown to have a dose dependent analgesic effect on A. suum's latency of response to heat with morphine being the most potent. The analgesic effect of morphine was reversed by naloxone but not CTOP. Neither naloxone nor CTOP was able to block the analgesia of M6G. CTOP but not naloxone had significant analgesic effects on its own. These findings are generally consistent with previous results on the effects of opiates and nitric oxide release from A. suum tissue. Apparently these nematodes possess opioid receptors that effect nociception.
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Affiliation(s)
- Stephen C Pryor
- Neuroscience Research Institute, State University of New York at Old Westbury, Old Westbury, NY 11568, USA.
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43
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Kotlinska J, Pachuta A, Dylag T, Silberring J. The role of neuropeptide FF (NPFF) in the expression of sensitization to hyperlocomotor effect of morphine and ethanol. Neuropeptides 2007; 41:51-8. [PMID: 17107711 DOI: 10.1016/j.npep.2006.09.048] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2006] [Revised: 09/15/2006] [Accepted: 09/15/2006] [Indexed: 11/24/2022]
Abstract
Neuropeptide FF (NPFF) has been characterized as an endogenous anti-opioid peptide because its intraventricular injection (icv) reversed morphine- and stress-induced analgesia, and precipitates withdrawal syndrome in morphine-dependent rats. The role of NPFF in other aspects of drug dependence is unknown. Therefore, the aim of this study was to determine NPFF influence on the expression of sensitization to the morphine-induced hyperlocomotion. As the opioid system plays a role in ethanol effects, the influence of NPFF on the expression of sensitization to hyperlocomotor effect of ethanol was also investigated. Our study indicated that acute administration of NPFF (5, 10, 20nmol, icv) inhibited the expression of morphine-induced sensitization at doses of 10 (P<0.05) and 20nmol (P<0.01), and also inhibited ethanol-induced sensitization at a dose of 20nmol (P<0.01). Furthermore, NPFF inhibited the acute locomotor effect of morphine (10 and 20nmol) but not that of ethanol. NPFF, given alone, did not change the locomotor activity of mice and did not disturb motor coordination of animals in the rotarod test. In conclusion, our experiments indicated that NPFF attenuated the acute morphine locomotion and the expression of sensitization to locomotion. We anticipate that NPFF may be involved in both of these effects.
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Affiliation(s)
- Jolanta Kotlinska
- Department of Pharmacology and Pharmacodynamics, Medical University, Staszica Str. 4, 20-081 Lublin, Poland.
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44
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Yudin YK, Tamarova ZA, Krishtal OA. Peripherally applied neuropeptide SF is equally algogenic in wild type and ASIC3−/− mice. Neurosci Res 2006; 55:421-5. [PMID: 16730827 DOI: 10.1016/j.neures.2006.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2005] [Revised: 04/18/2006] [Accepted: 04/21/2006] [Indexed: 11/18/2022]
Abstract
RFa-related peptides play a significant role in the processing of pain in the CNS of mammals. Recently it has been found that, when applied subcutaneously, these peptides elicit a powerful algogenic effect. The question arises whether this peripheral effect can be connected with the ability of RFa-related peptides to decrease the rate of desensitization of acid sensing ionic channels (ASICs) expressed in primary sensory neurons. We have addressed this question by comparing the effects of neuropeptide SF (NPSF), mammalian RFa peptide, in ASIC3-/- and wild-type C57BL/6J mice. Knockout of ASIC3 gene results in the changes in some of the behavioral parameters. However, subcutaneous injections of the NPSF into the n.saphenous innervation area result in a clearly nociceptive behavior in both strains of mice. There is no significant difference in the total time of licking of injected paw in the ASIC3-/- (194+/-22s) and C57BL/6J (227+/-25s) animals. Thus peripheral algogenic effects of NPSF cannot be explained only in terms of their action on the ASIC3 channels and involves some other, still unidentified mechanism.
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Affiliation(s)
- Yevgen K Yudin
- Bogomoletz Institute of Physiology, Bogomoletz Str. 4, 01024 Kiev, Ukraine.
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45
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Hanif K, Gupta K, Gupta S, Gupta YK, Maiti S, Pasha S. Chimeric peptide of met-enkephalin and FMRFa: Effect of chlorination on conformation and analgesia. Neurosci Lett 2006; 403:131-5. [PMID: 16764989 DOI: 10.1016/j.neulet.2006.04.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2006] [Revised: 04/20/2006] [Accepted: 04/20/2006] [Indexed: 11/26/2022]
Abstract
In our previous study YFa (YGGFMKKKFMRFa), a chimeric peptide of met-enkephalin and FMRFa, not only produced analgesia but also did not let the tolerance develop. In the continuation of the same study, Phe4 is chlorinated so as to assess the effect of chlorination on the conformation, lipophilicity and analgesia of chimeric peptide [p-Cl Phe(4)] YFa. Not only does the chlorination increase the lipophilicity but also enhances the propensity of [p-Cl Phe(4)] YFa to form alpha helix in comparison of YFa in presence of membrane mimicking solvent trifluoroethanol (TFE). This increase in lipophilicity and helix-forming ability results in more bioavailability and naloxone-reversible analgesia by [p-Cl Phe(4)] YFa. Though analgesia produced by [p-Cl Phe(4)] YFa is more than YFa at all doses, there is sudden decrease in analgesia at 45 and 60 min at 60 mg/kg. This sudden decrease of analgesia seems to be due to desensitization of opioid receptors.
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Affiliation(s)
- Kashif Hanif
- Peptide Synthesis Laboratory, Institute of Genomics and Integrative Biology, Mall Road, Delhi 110007, India
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46
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Jhamandas K, Milne B, Sutak M, Gouarderes C, Zajac JM, Yang HYT. Facilitation of spinal morphine analgesia in normal and morphine tolerant animals by neuropeptide SF and related peptides. Peptides 2006; 27:953-63. [PMID: 16515821 DOI: 10.1016/j.peptides.2005.09.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2005] [Accepted: 09/16/2005] [Indexed: 11/24/2022]
Abstract
Neuropeptide FF and related synthetic amidated peptides have been shown to elicit sustained anti-nociceptive responses and potently augment spinal anti-nociceptive actions of spinal morphine in tests of thermal and mechanical nociception. Recent studies have described the occurrence of another octapeptide, neuropeptide SF (NPSF) in the spinal cord and the cerebrospinal fluid and demonstrated its affinity for the NPFF receptors. This study examined the effects of NPSF and two putative precursor peptides, EFW-NPSF and NPAF, on the spinal actions of morphine in normal and opioid tolerant rats using the tailflick and pawpressure tests. In normal rats, NPSF demonstrated weak intrinsic activity but sub-effective doses of the peptide significantly increased the magnitude and duration of spinal morphine anti-nociception in both tests. A low-dose of NPSF also augmented the spinal actions of a delta receptor agonist, deltorphin. The morphine-potentiating effect of NPSF was shared by EFW-NPSF and the octadecapeptide NPAF. In animal rendered tolerant by continuous intrathecal infusion of morphine for 6 days, low dose NPSF itself elicited a significant anti-nociceptive response and potently increased morphine-induced response in both tests. In animals made tolerant by repeated injections of intrathecal morphine, administration of NPSF, EFW-NPSF, and NPAF with morphine reversed the loss of the anti-nociceptive effect and restored the agonist potency. The results demonstrate that in normal animals NPSF and related peptides exert strong potentiating effect on morphine anti-nociception at the spinal level and in tolerant animals these agents can reverse the loss of morphine potency.
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Affiliation(s)
- K Jhamandas
- Department of Pharmacology and Toxicology and Department of Anesthesiology, Faculty of Health Sciences, Queen's University, Kingston, Ont., Canada K7L 3N6.
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Kersanté F, Mollereau C, Zajac JM, Roumy M. Anti-opioid activities of NPFF1 receptors in a SH-SY5Y model. Peptides 2006; 27:980-9. [PMID: 16488058 DOI: 10.1016/j.peptides.2005.07.025] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2005] [Accepted: 07/04/2005] [Indexed: 11/28/2022]
Abstract
In order to elucidate the mechanisms of the neuronal anti-opioid activity of Neuropeptide FF, we have transfected the SH-SY5Y neuroblastoma cell line, which expresses mu- and delta-opioid receptors, with the human NPFF1 receptor. The SH1-C7 clone expresses high affinity NPFF1 receptors in the same range order of density as opioid receptors. Similarly to the opioids, acute stimulation with the NPFF1 agonist NPVF inhibits adenylyl cyclase activity and voltage-gated (N-type) Ca2+ currents and enhances the intracellular Ca2+ release triggered by muscarinic receptors activation. In contrast, preincubation of cells with NPVF decreases the response to opioids on both calcium signaling, thus reproducing the cellular anti-opioid activity described in neurons. SH1-C7 cells are therefore a suitable model to investigate the interactions between NPFF and opioid receptors.
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Affiliation(s)
- Flavie Kersanté
- Institut de Pharmacologie et de Biologie Structurale, CNRS, UMR 5089, 205 route de Narbonne, 31077 Toulouse cedex 04, France
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Vyas N, Mollereau C, Chevé G, McCurdy CR. Structure-activity relationships of neuropeptide FF and related peptidic and non-peptidic derivatives. Peptides 2006; 27:990-6. [PMID: 16490282 DOI: 10.1016/j.peptides.2005.07.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2005] [Accepted: 07/13/2005] [Indexed: 10/25/2022]
Abstract
Neuropeptide FF, a member of the RFamide family of peptides, has demonstrated an interesting array of pharmacological effects. To date however, little information has been obtained as to the exact pharmacological roles of the individual NPFF1 and NPFF2 receptors. Through peptide analogs of NPFF and related peptides, the essential pharmacophore has emerged somewhat. Yet, the field is lacking small molecule ligands selective for each receptor. This review of the structure-activity relationships of the reported NPFF peptide analogs and some non-selective small molecule ligands highlights the current understanding of the pharmacophoric elements required for affinity and activity at the NPFF receptors. The lack of mutagenesis data on the receptor as well as a crystal structure has also hindered the understanding of ligand recognition at the receptor level. If the targets can be further investigated as to their requirements for ligand recognition, the successful development of highly selective ligands should follow.
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Affiliation(s)
- Neha Vyas
- Laboratory for Applied Drug Design and Synthesis, Department of Medicinal Chemistry, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
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49
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Yang HYT, Iadarola MJ. Modulatory roles of the NPFF system in pain mechanisms at the spinal level. Peptides 2006; 27:943-52. [PMID: 16443306 DOI: 10.1016/j.peptides.2005.06.030] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2005] [Accepted: 06/29/2005] [Indexed: 11/29/2022]
Abstract
The possible roles of the NPFF system in pain processing are summarized from the viewpoints of (1) biological activities of NPFF, (2) anatomical distribution of NPFF and its receptor(s) and (3) the regulation of NPFF and receptor(s) in animal models of pain. NPFF and NPFF analogues were found to have analgesic, pronociceptive and morphine modulating activities. Since the isolation of NPFF, several other RF-NH2 peptides have been identified and some of them were found to have nociceptive or morphine modulating activity. Depending on the pharmacological doses and locations of administration, NPFF may exhibit the biological activities of other structurally related RF-NH2 peptides thus complicating NPFF bioactivity studies and their interpretation. Acid sensing ion channels were found to respond to RF-NH2 peptides including NPFF, raising the possibility that interaction of NPFF and acid sensing ion channels can modulate nociceptive activity. NPFF and NPFF receptor mRNAs are highly expressed and localized in the superficial layers of the dorsal cord, the two genes are also in dorsal root ganglia though at much lower level. The spinal NPFF system is up-regulated by peripheral inflammation in the rat. Furthermore, immunohistochemically, NPFF receptor 2-protein was demonstrated to be increased in the primary afferents in the spinal cord of rats with peripheral inflammation. Regulation and localization of spinal NPFF systems, taken together with the analgesic bioactivity of intrathecally administered NPFF, strongly suggest involvement of spinal NPFF system in pain processing.
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Affiliation(s)
- Hsiu-Ying T Yang
- Neuronal Gene Expression Section, Pain and Neurosensory Mechanisms Branch, National Institute of Dental and Craniofacial Research, National Institute of Health, Bethesda, MD 20892-4410, USA.
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Pombal MA, López JM, de Arriba MC, Megías M, González A. Distribution of neuropeptide FF-like immunoreactive structures in the lamprey central nervous system and its relation to catecholaminergic neuronal structures. Peptides 2006; 27:1054-72. [PMID: 16487629 DOI: 10.1016/j.peptides.2005.06.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2005] [Accepted: 06/22/2005] [Indexed: 11/16/2022]
Abstract
The neuropeptide FF (NPFF) is an octapeptide of the RFamide-related peptides (FaRPs) that was primarily isolated from the bovine brain. Its distribution in the CNS has been reported in several mammalian species, as well as in some amphibians. Therefore, in order to gain insight in the evolution on the expression pattern of this neuropeptide in vertebrates, we carried out an immunohistochemical study in the sea lamprey, Petromyzon marinus. The distribution of NPFF-like-immunoreactive (NPFF-ir) structures in the lamprey brain is, in general, comparable to that previously described in other vertebrate species. In lamprey, most of the NPFF-ir cells were found in the hypothalamus, particularly in two large populations, the bed nucleus of the tract of the postoptic commissure and the tuberomammillary area. Numerous NPFF-ir cells were also observed in the rostral rhombencephalon, including a population in the dorsal isthmic gray and the reticular formation. Additional labeled neurons were found inside the preoptic region, the parapineal vesicle, the periventricular mesencephalic tegmentum, the descending trigeminal tract, the nucleus of the solitary tract, as well as in the gray matter of the spinal cord. The NPFF-ir fibers were widely distributed in the brain and the spinal cord, being, in general, more concentrated throughout the basal plate. The presence of NPFF-ir fibers in the lamprey neurohypophysis suggests that the involvement of NPFF-like substances in the hypothalamo-hypophyseal system had emerged early during evolution.
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Affiliation(s)
- Manuel A Pombal
- Neurolam Group, Department of Functional Biology and Health Sciences, Faculty of Biology, University of Vigo, 36310 Vigo, Spain.
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