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Saklani P, Khan H, Gupta S, Kaur A, Singh TG. Neuropeptides: Potential neuroprotective agents in ischemic injury. Life Sci 2022; 288:120186. [PMID: 34852271 DOI: 10.1016/j.lfs.2021.120186] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 12/24/2022]
Abstract
AIM Ischemic damage to the brain is linked to an increased rate of morbidity and mortality worldwide. In certain parts of the world, it remains a leading cause of mortality and the primary cause of long-term impairment. Ischemic injury is exacerbated when particular neuropeptides are removed, or their function in the brain is blocked, whereas supplying such neuropeptides lowers ischemic harm. Here, we have discussed the role of neuropeptides in ischemic injury. MATERIALS & METHODS Numerous neuropeptides had their overexpression following cerebral ischemia. Neuropeptides such as NPY, CGRP, CART, SP, BK, PACAP, oxytocin, nociception, neurotensin and opioid peptides act as transmitters, documented in several "in vivo" and "in vitro" studies. Neuropeptides provide neuroprotection by activating the survival pathways or inhibiting the death pathways, i.e., MAPK, BDNF, Nitric Oxide, PI3k/Akt and NF-κB. KEY FINDINGS Neuropeptides have numerous beneficial effects in ischemic models, including antiapoptotic, anti-inflammatory, and antioxidant actions that provide a powerful protective impact in neurons when combined. These innovative therapeutic substances have the potential to treat ischemia injury due to their pleiotropic modes of action. SIGNIFICANCE This review emphasizes the neuroprotective role of neuropeptides in ischemic injury via modulation of various signalling pathways i.e., MAPK, BDNF, Nitric Oxide, PI3k/Akt and NF-κB.
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Affiliation(s)
- Priyanka Saklani
- Chitkara College of Pharmacy, Chitkara University, 140401, Punjab, India
| | - Heena Khan
- Chitkara College of Pharmacy, Chitkara University, 140401, Punjab, India
| | - Saurabh Gupta
- Chitkara College of Pharmacy, Chitkara University, 140401, Punjab, India
| | - Amarjot Kaur
- Chitkara College of Pharmacy, Chitkara University, 140401, Punjab, India
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2
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Sánchez ML, Coveñas R. The Neurotensinergic System: A Target for Cancer Treatment. Curr Med Chem 2021; 29:3231-3260. [PMID: 34711154 DOI: 10.2174/0929867328666211027124328] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 08/19/2021] [Accepted: 08/26/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND The scientific interest regarding the involvement of peptides in cancer has increased in the last years. In tumor cells the overexpression of peptides and their receptors is known and new therapeutic targets for the treatment of cancer have been suggested. The overexpression of the neurotensinergic system has been associated with poor prognosis, tumor size, higher tumor aggressiveness, increased relapse risk and worse sensitivity to chemotherapy agents. OBJECTIVE The aim of this review is to update the findings regarding the involvement of the neurotensinergic system in cancer to suggest anticancer therapeutic strategies targeting this system. The neurotensin (NT) precursor, NT and its receptors (NTR) and the involvement of the neurotensinergic system in lung, breast, prostate, gastric, colon, liver and pancreatic cancers, glioblastoma, neuroendocrine tumors and B-cell leukemia will be mentioned and discussed as well as the signaling pathways mediated by NT. Some research lines to be developed in the future will be suggested such as: molecules regulating the expression of the NT precursor, influence of the diet in the development of tumors, molecules and signaling pathways activated by NT and antitumor therapeutic strategies targeting the neurotensinergic system. CONCLUSION NT, via the NTR, exerts oncogenic (tumor cell proliferation, invasion, migration, angiogenesis) and antiapoptotic effects, whereas NTR antagonists inhibit these effects. NTR expression can be used as a diagnostic tool/therapeutic target and the administration of NTR antagonists as antitumor drugs could be a therapeutic strategy to treat tumors overexpressing NTR.
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Affiliation(s)
- Manuel Lisardo Sánchez
- University of Salamanca, Laboratory of Neuroanatomy of the Peptidergic Systems (Lab. 14), Institute of Neurosciences of Castilla y León (INCYL), Salamanca. Spain
| | - Rafael Coveñas
- University of Salamanca, Laboratory of Neuroanatomy of the Peptidergic Systems (Lab. 14), Institute of Neurosciences of Castilla y León (INCYL), Salamanca. Spain
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3
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Campbell GE, Bender HR, Parker GA, Curry TE, Duffy DM. Neurotensin: A novel mediator of ovulation? FASEB J 2021; 35:e21481. [PMID: 33710668 PMCID: PMC8314182 DOI: 10.1096/fj.202002547rr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 02/11/2021] [Accepted: 02/12/2021] [Indexed: 12/16/2022]
Abstract
The midcycle luteinizing hormone (LH) surge initiates a cascade of events within the ovarian follicle which culminates in ovulation. Only mural granulosa cells and theca cells express large numbers of LH receptors, and LH-stimulated paracrine mediators communicate the ovulatory signal within the follicle. Recent reports identified the neuropeptide neurotensin (NTS) as a product of granulosa cells. Here, we demonstrate that granulosa cells were the primary site of NTS expression in macaque ovulatory follicles. Granulosa cell NTS mRNA and protein increased after human chorionic gonadotropin (hCG) administration, which substitutes for the LH surge. To identify ovulatory actions of NTS, a NTS-neutralizing antibody was injected into preovulatory macaque follicles. hCG administration immediately followed, and ovaries were removed 48 hours later to evaluate ovulatory events. Follicles injected with control IgG ovulated normally. In contrast, 75% of NTS antibody-injected follicles failed to ovulate, containing oocytes trapped within unruptured, hemorrhagic follicles. Serum progesterone was unchanged. Of the three NTS receptors, SORT1 was highly expressed in follicular granulosa, theca, and endothelial cells; NTSR1 and NTSR2 were expressed at lower levels. Excessive blood cells in NTS antibody-injected follicles indicated vascular anomalies, so the response of monkey ovarian endothelial cells to NTS was evaluated in vitro. NTS stimulated endothelial cell migration and capillary sprout formation, consistent with a role for NTS in vascular remodeling associated with ovulation. In summary, we identified NTS as a possible paracrine mediator of ovulation. Further investigation of the NTS synthesis/response pathway may lead to improved treatments for infertility and novel targets for contraception.
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Affiliation(s)
- Genevieve E. Campbell
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Hannah R. Bender
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Grace A. Parker
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Thomas E. Curry
- Department of Obstetrics and Gynecology, University of Kentucky, Lexington, KY, USA
| | - Diane M. Duffy
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
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4
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Campbell GE, Jones EL, Comizzoli P, Duffy DM. Neurotensin stimulates the sperm acrosome reaction and reduces percentages of fertilization in vitro. F&S SCIENCE 2020; 1:27-35. [PMID: 35559737 PMCID: PMC10034862 DOI: 10.1016/j.xfss.2020.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/02/2020] [Accepted: 03/13/2020] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To determine the impact of neurotensin (NTS), a naturally occurring peptide, on the function of human and nonhuman primate sperm. DESIGN Experimental study. SETTING University-based research laboratory. PATIENT(S)/ANIMAL(S) Consenting normozoospermic human donors and cynomolgus macaques. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Sperm acrosome status was assessed. Computer-assisted semen analysis assessed sperm motility, progression, and velocity. Immunocytochemistry and receptor selective agonists were used to identify specific NTS receptors on sperm. Monkey oocytes were obtained after ovarian stimulation, and NTS-treated monkey sperm were used for in vitro fertilization. RESULTS Neurotensin treatment of human sperm stimulated the acrosome reaction in both a dose-dependent (0.1-10 μmol/L) and time-dependent (5-30 minutes) manner. Neurotensin treatment did not alter sperm motility or progression. Both a general NTS receptor antagonist (SR142948) and a NTSR1 selective antagonist (SR48692) reduced the ability of NTS to stimulate the acrosome reaction. The neurotensin receptor NTSR1, but not NTSR2 or SORT1, was detected in monkey sperm using immunostaining. Neurotensin treatment also compromised the ability of sperm to fertilize an oocyte. Percentage of fertilization with untreated monkey sperm and monkey oocytes was 72%. Sperm pre-treated with NTS yielded a significantly lower fertilization rate of 18%. CONCLUSION(S) Neurotensin effectively stimulates the acrosome reaction in human and monkey sperm. Neurotensin produced by the oviduct or cumulus cells may promote natural fertilization. Pretreatment of sperm with NTS significantly reduces fertilization. Exposure of sperm to NTS prior to reaching the oviduct has the potential for contraceptive development. Identification of NTSR1 as the mediator of NTS action provides a specific target for future studies.
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Affiliation(s)
- Genevieve E Campbell
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, Virginia
| | - Estella L Jones
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, Virginia; Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk, Virginia
| | - Pierre Comizzoli
- Smithsonian Conservation Biology Institute, Front Royal, Virginia, and Washington, District of Columbia
| | - Diane M Duffy
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, Virginia.
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5
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Dongiovanni P, Meroni M, Petta S, Longo M, Alisi A, Soardo G, Valenti L, Miele L, Grimaudo S, Pennisi G, Antonio G, Consonni D, Fargion S, Fracanzani AL. Neurotensin up-regulation is associated with advanced fibrosis and hepatocellular carcinoma in patients with MAFLD. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158765. [PMID: 32663609 DOI: 10.1016/j.bbalip.2020.158765] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/24/2020] [Accepted: 07/07/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS Neurotensin (NTS), a 13-aminoacid peptide localized in central nervous system and gastrointestinal tract, is involved in lipid metabolism and promotes various cancers onset mainly by binding to neurotensin receptor 1 (NTSR1). Increased plasma levels of pro-NTS, the stable NTS precursor, have been associated with type 2 diabetes (T2D), cardiovascular diseases and metabolic associated fatty liver disease (MAFLD). We aimed to evaluate 1) the impact of NTS rs1800832 and NTSR1 rs6090453 genetic variants on liver damage in 1166 MAFLD European individuals, 2) the relation between NTS variant and circulating pro-NTS and 3) the hepatic NTS expression by RNAseq transcriptomic analysis in 125 bariatric patients. RESULTS The NTS rs1800832 G allele was associated with hepatic fibrosis (OR 1.27, 95% confidence interval (CI). 1.02-1.58; p = 0.03), even more in carriers of both NTS and NTSR1 G risk alleles (OR 1.17, 95% CI. 1.03-1.34; p = 0.01), with cirrhosis (OR 1.58, 95% CI. 1.07-2.34; p = 0.02) and HCC (OR 1.98, 95% CI. 1.24-3.2; p = 0.004). Pro-NTS circulating levels were correlated with T2D (p = 0.005), BMI, (p = 0.04), age (p = 0.0016), lobular inflammation (p = 0.0025), fibrosis>2 (p < 0.0001), cirrhosis (p = 0.0009) and HCC (p < 0.0001) and more so after stratification for the NTS G allele. Transcriptomic data showed that hepatic NTS expression correlated with that of fibrogenic genes (p < 0.05). CONCLUSIONS NTS rs1800832 variant is associated with advanced fibrosis and HCC in MAFLD patients likely affecting NTS protein activity. The rs6090453 NTSR1 gene variant synergizes with NTS rs1800832 mutation to promote liver damage. Prospective studies are necessary to confirm NTS role in liver disease progression.
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Affiliation(s)
- Paola Dongiovanni
- General Medicine and Metabolic Diseases, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Marica Meroni
- General Medicine and Metabolic Diseases, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy; Departments of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Salvatore Petta
- Sezione di Gastroenterologia e Epatologia, PROMISE, University of Palermo, Italy
| | - Miriam Longo
- General Medicine and Metabolic Diseases, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Anna Alisi
- Research Unit of Molecular Genetics of Complex Phenotypes, "Bambino Gesù" Children's Hospital IRCCS, Rome, Italy
| | - Giorgio Soardo
- Department of Medical Area (DAME), University of Udine and Italian Liver Foundation, Bldg Q AREA Science Park - Basovizza Campus, Trieste, Italy
| | - Luca Valenti
- Translational Medicine, University of Milan, Fondazione IRCCS Cà Granda Pad Marangoni, Milan, Italy
| | - Luca Miele
- Area Medicina Interna, Gastroenterologia e Oncologia Medica, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Stefania Grimaudo
- Sezione di Gastroenterologia e Epatologia, PROMISE, University of Palermo, Italy
| | - Grazia Pennisi
- Sezione di Gastroenterologia e Epatologia, PROMISE, University of Palermo, Italy
| | - Grieco Antonio
- Area Medicina Interna, Gastroenterologia e Oncologia Medica, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Dario Consonni
- Epidemiology Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Silvia Fargion
- General Medicine and Metabolic Diseases, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Anna Ludovica Fracanzani
- General Medicine and Metabolic Diseases, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy; Departments of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy.
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Plach M, Schäfer T, Borroto-Escuela DO, Weikert D, Gmeiner P, Fuxe K, Friedland K. Differential allosteric modulation within dopamine D 2R - neurotensin NTS1R and D 2R - serotonin 5-HT 2AR receptor complexes gives bias to intracellular calcium signalling. Sci Rep 2019; 9:16312. [PMID: 31704949 PMCID: PMC6841725 DOI: 10.1038/s41598-019-52540-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 10/15/2019] [Indexed: 12/11/2022] Open
Abstract
Proceeding investigations of G protein-coupled receptor (GPCR) heterocomplexes have demonstrated that the dopamine D2 receptor (D2R), one of the hub receptors in the physiology of schizophrenia, interacts with both the neurotensin NTS1 (NTS1R) and the serotonin 5-HT2A receptor (5-HT2AR) in cell lines and rodent brain tissue. In situ proximity ligation assay and BRET-based saturation experiments confirmed interacting receptor assemblies in HEK293T and neuronal HT22 cells. The NTS1R agonist NT(8-13) reduces the Gαq-mediated calcium signal in the NTS1R-D2R complex compared to the NTS1R monomer which could be reversed by D2R antagonists. The bivalent ligand CS148 (NTS1R-agonistic, D2R-antagonistic) increased the calcium response addressing the dimer, consistent with the effect of the monovalent ligands suggesting an allosteric D2R-mediated modulation. In contrast, the 5-HT2AR-D2R heteromer did not show a calcium-altering receptor-receptor interaction. Despite their common coupling-preference for Gαq, 5-HT2AR and NTS1R supposedly interact with D2R each in a unique mode. This remarkably diverse ligand-mediated signalling in two different D2R heteroreceptor complexes illustrates the complexity of receptor-receptor interactions and their potential of modifying cell responses to external stimuli. Therefore, GPCR heteromers may provide a very promising novel target for the therapy of neuropsychiatric disorders.
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Affiliation(s)
- Michael Plach
- Department of Chemistry and Pharmacy, Molecular and Clinical Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Thorsten Schäfer
- Department of Chemistry and Pharmacy, Molecular and Clinical Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | | | - Dorothée Weikert
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Peter Gmeiner
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Kjell Fuxe
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Kristina Friedland
- Department of Chemistry and Pharmacy, Molecular and Clinical Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany. .,Pharmacology and Toxicology, Institute of Pharmacy and Biochemistry, Johannes-Gutenberg-Universität, Mainz, Germany.
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7
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Umezu K, Yajima R, Hiradate Y, Yanai R, Numabe T, Hara K, Oikawa T, Tanemura K. Improvement in blastocyst quality by neurotensin signaling via its receptors in bovine spermatozoa during in vitro fertilization. J Reprod Dev 2019; 65:147-153. [PMID: 30662011 PMCID: PMC6473113 DOI: 10.1262/jrd.2018-147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Previously, we reported that neurotensin (NT), which is expressed in the uterus and oviduct, enhanced bovine sperm capacitation and acrosome reactions. As NT mRNA expression in bovine
oviducts increases dramatically in the follicular phase, we hypothesized that NT modulates fertilization and subsequent conception in cattle. The objective of this study was to evaluate the
effect of NT on embryo development and blastocyst quality. The rate of embryo cleavage was significantly increased by the addition of NT to the fertilization medium. Furthermore, the total
number of cells and numbers of cells in the inner cell mass of blastocysts were significantly increased by NT during in vitro fertilization (IVF). These results suggested
that NT enhanced the efficiency of early bovine embryo development and blastocyst quality. The expression of NT receptors (NTRs) in sperm, testes, oocytes, and cumulus cells was evaluated to
determine whether NT acted via NTRs in sperm alone or in both male and female reproductive cells during IVF. Immunocytochemistry and reverse transcription polymerase chain reaction revealed
that NTR1 and NTR2 were expressed in sperm and testes, but not in oocytes and cumulus cells. We propose that NT selectively acts upon sperm via NTR1 and NTR2 during IVF to improve the
cleavage rate and quality of blastocysts, which are important determinants of sperm quality for successful conception. This research supports our hypothesis that NT acts as a key modulator
of fertilization and conception in cattle. Further studies are necessary to apply our findings to the industrial framework of bovine reproduction.
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Affiliation(s)
- Kohei Umezu
- Laboratory of Animal Reproduction and Development, Graduate School of Agricultural Science, Tohoku University, Miyagi 980-0845, Japan
| | - Risa Yajima
- Miyagi Prefectural Livestock Experiment Station, Miyagi 989-6445, Japan
| | - Yuuki Hiradate
- Laboratory of Animal Reproduction and Development, Graduate School of Agricultural Science, Tohoku University, Miyagi 980-0845, Japan
| | - Rin Yanai
- Laboratory of Animal Reproduction and Development, Graduate School of Agricultural Science, Tohoku University, Miyagi 980-0845, Japan
| | - Takashi Numabe
- Miyagi Agricultural Development Corporation, Miyagi 981-0914, Japan
| | - Kenshiro Hara
- Laboratory of Animal Reproduction and Development, Graduate School of Agricultural Science, Tohoku University, Miyagi 980-0845, Japan
| | - Toshinori Oikawa
- Miyagi Prefectural Livestock Experiment Station, Miyagi 989-6445, Japan
| | - Kentaro Tanemura
- Laboratory of Animal Reproduction and Development, Graduate School of Agricultural Science, Tohoku University, Miyagi 980-0845, Japan
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8
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Rejwan Ali M, Sadoqi M, Boutajangout A, Mezei M. Virtual screening of a natural compound library at orthosteric and allosteric binding sites of the neurotensin receptor. J Biomol Struct Dyn 2019; 37:4494-4506. [DOI: 10.1080/07391102.2018.1552200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- M. Rejwan Ali
- Department of Physics, St John’s University, Queens, NY, USA
| | - Mostafa Sadoqi
- Department of Physics, St John’s University, Queens, NY, USA
- Department of Pharmaceutical Sciences, St John’s University, Queens, NY, USA
| | - Allal Boutajangout
- Department of Neurology and Neuroscience & Physiology and Psychiatry, New York University Langone Medical Center, New York, NY, USA
| | - Mihaly Mezei
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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9
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Choi JH, Yarishkin O, Kim E, Bae Y, Kim A, Kim SC, Ryoo K, Cho CH, Hwang EM, Park JY. TWIK-1/TASK-3 heterodimeric channels contribute to the neurotensin-mediated excitation of hippocampal dentate gyrus granule cells. Exp Mol Med 2018; 50:1-13. [PMID: 30416196 PMCID: PMC6230555 DOI: 10.1038/s12276-018-0172-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 07/16/2018] [Accepted: 07/23/2018] [Indexed: 01/15/2023] Open
Abstract
Two-pore domain K+ (K2P) channels have been shown to modulate neuronal excitability. The physiological role of TWIK-1, the first identified K2P channel, in neuronal cells is largely unknown, and we reported previously that TWIK-1 contributes to the intrinsic excitability of dentate gyrus granule cells (DGGCs) in mice. In the present study, we investigated the coexpression of TWIK-1 and TASK-3, another K2P member, in DGGCs. Immunohistochemical staining data showed that TASK-3 proteins were highly localized in the proximal dendrites and soma of DGGCs, and this localization is similar to the expression pattern of TWIK-1. TWIK-1 was shown to associate with TASK-3 in DGGCs of mouse hippocampus and when both genes were overexpressed in COS-7 cells. shRNA-mediated gene silencing demonstrated that TWIK-1/TASK-3 heterodimeric channels displayed outwardly rectifying currents and contributed to the intrinsic excitability of DGGCs. Neurotensin-neurotensin receptor 1 (NT-NTSR1) signaling triggered the depolarization of DGGCs by inhibiting TWIK-1/TASK-3 heterodimeric channels, causing facilitated excitation of DGGCs. Taken together, our study clearly showed that TWIK-1/TASK-3 heterodimeric channels contribute to the intrinsic excitability of DGGCs and that their activities are regulated by NT-NTSR1 signaling.
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Affiliation(s)
- Jae Hyouk Choi
- Korea Institute of Science and Technology (KIST), Center for Functional Connectomics, Seoul, 02792, Republic of Korea.,Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seoul, 02792, Republic of Korea
| | - Oleg Yarishkin
- Korea Institute of Science and Technology (KIST), Center for Functional Connectomics, Seoul, 02792, Republic of Korea
| | - Eunju Kim
- Korea Institute of Science and Technology (KIST), Center for Functional Connectomics, Seoul, 02792, Republic of Korea.,School of Biosystem and Biomedical Science, College of Health Science, Korea University, Seoul, 02841, Republic of Korea
| | - Yeonju Bae
- School of Biosystem and Biomedical Science, College of Health Science, Korea University, Seoul, 02841, Republic of Korea
| | - Ajung Kim
- Korea Institute of Science and Technology (KIST), Center for Functional Connectomics, Seoul, 02792, Republic of Korea.,KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Seung-Chan Kim
- Korea Institute of Science and Technology (KIST), Center for Functional Connectomics, Seoul, 02792, Republic of Korea.,School of Biosystem and Biomedical Science, College of Health Science, Korea University, Seoul, 02841, Republic of Korea
| | - Kanghyun Ryoo
- School of Biosystem and Biomedical Science, College of Health Science, Korea University, Seoul, 02841, Republic of Korea
| | - Chang-Hoon Cho
- School of Biosystem and Biomedical Science, College of Health Science, Korea University, Seoul, 02841, Republic of Korea
| | - Eun Mi Hwang
- Korea Institute of Science and Technology (KIST), Center for Functional Connectomics, Seoul, 02792, Republic of Korea. .,Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seoul, 02792, Republic of Korea. .,KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, 02447, Republic of Korea.
| | - Jae-Yong Park
- School of Biosystem and Biomedical Science, College of Health Science, Korea University, Seoul, 02841, Republic of Korea.
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10
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Sundberg SC, Granseth B. Cre-expressing neurons in the cortical white matter of Ntsr1-Cre GN220 mice. Neurosci Lett 2018; 675:36-40. [PMID: 29580883 DOI: 10.1016/j.neulet.2018.03.053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/21/2018] [Accepted: 03/22/2018] [Indexed: 12/13/2022]
Abstract
Genetically modified mouse strains that express Cre-recombinase in specific neuronal sub-populations have become widely used tools for investigating neuronal function. The Ntsr1-Cre GN220 mouse expresses this enzyme in corticothalamic neurons in layer 6 of cerebral cortex. We observed that about 7% of Cre-expressing cells in the primary visual cortex are found within the white matter bordering layer 6. By using the immunohistochemical marker for layer 6 neurons, Forkhead box protein 2 (FoxP2), and fluorescently conjugated latex beads injected into the dorsal lateral geniculate nucleus, we show that about half of these cells are similar to and could belong to the layer 6 corticothalamic neuron population. The other half seems to be a distinct white matter (WM) neuron sub-population that we estimate to constitute 2-4% of the total cortical Cre-expressing population. Staining for the neuronal marker Neuronal nuclei (NeuN) revealed that about 15-40% of WM neurons are Cre-expressing. Thus, the potential contribution from WM neurons needs to be considered when interpreting the results from experiments using the Ntsr1-Cre GN220 mouse for investigating corticothalamic neuronal function.
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Affiliation(s)
- Sofie C Sundberg
- Department of Clinical and Experimental Medicine, Linköping University, Sweden
| | - Björn Granseth
- Department of Clinical and Experimental Medicine, Linköping University, Sweden.
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11
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Tschumi CW, Beckstead MJ. Diverse actions of the modulatory peptide neurotensin on central synaptic transmission. Eur J Neurosci 2018; 49:784-793. [PMID: 29405480 DOI: 10.1111/ejn.13858] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 01/29/2018] [Accepted: 01/30/2018] [Indexed: 12/27/2022]
Abstract
Neurotensin (NT) is a 13 amino acid neuropeptide that is expressed throughout the central nervous system and is implicated in the etiology of multiple diseases and disorders. Many primary investigations of NT-induced modulation of neuronal excitability at the level of the synapse have been conducted, but they have not been summarized in review form in nearly 30 years. Therefore, the goal of this review is to discuss the many actions of NT on neuronal excitability across brain regions as well as NT circuit architecture. In the basal ganglia as well as other brain nuclei, NT can act through diverse intracellular signaling cascades to enhance or depress neuronal activity by modulating activity of ion channels, ionotropic and metabotropic neurotransmitter receptors, and presynaptic release of neurotransmitters. Further, NT can produce indirect effects by evoking endocannabinoid release, and recently has itself been identified as a putative retrograde messenger. In the basal ganglia, the diverse actions and circuit architecture of NT signaling allow for input-specific control of reward-related behaviors.
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Affiliation(s)
- Christopher W Tschumi
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104-5005, USA
| | - Michael J Beckstead
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104-5005, USA
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12
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Ye Y, Long X, Zhang L, Chen J, Liu P, Li H, Wei F, Yu W, Ren X, Yu J. NTS/NTR1 co-expression enhances epithelial-to-mesenchymal transition and promotes tumor metastasis by activating the Wnt/β-catenin signaling pathway in hepatocellular carcinoma. Oncotarget 2018; 7:70303-70322. [PMID: 27611941 PMCID: PMC5342554 DOI: 10.18632/oncotarget.11854] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 08/23/2016] [Indexed: 01/07/2023] Open
Abstract
Neurotensin (NTS) is a neuropeptide distributed in central nervous and digestive systems. In this study, the significant association between ectopic NTS expression and tumor invasion was confirmed in hepatocellular carcinoma (HCC). In primary HCC tissues, the NTS and neurotensin receptor 1 (NTR1) co-expression (NTS+NTR1+) is a poor prognostic factor correlated with aggressive biological behaviors and poor clinical prognosis. Enhanced epithelial-to-mesenchymal transition (EMT) features, including decreased E-cadherin, increased β-catenin translocation and N-cadherin expression, were identified in NTS+NTR1+ HCC tissues. Varied NTS-responsible HCC cell lines were established using NTR1 genetically modified Hep3B and HepG2 cells which were used to elucidate the molecular mechanisms regulating NTS-induced EMT and tumor invasion in vitro. Results revealed that inducing exogenous NTS stimulation and enhancing NTR1 expression promoted tumor invasion rather than proliferation by accelerating EMT in HCC cells. The NTS-induced EMT was correlated with the remarkable increase in Wnt1, Wnt3, Wnt5, Axin, and p-GSK3β expression and was significantly reversed by blocking the NTS signaling via the NTR1 antagonist SR48692 or by inhibiting the activation of the Wnt/β-catenin pathway via specific inhibitors, such as TSW119 and DKK-1. SR48692 also inhibited the metastases of NTR1-overexpressing HCC xenografts in the lungs in vivo. This finding implied that NTS may be an important stimulus to promote HCC invasion and metastasis both in vitro and in vivo, and NTS signaling enhanced the tumor EMT and invasion potentials by activating the canonical Wnt/β-catenin signaling pathway. Therefore, NTS may be a valuable therapeutic target to prevent tumor progression in HCC.
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Affiliation(s)
- Yingnan Ye
- Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy, Tianjin, P. R. China
| | - Xinxin Long
- Department of Immunology, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, P. R. China
| | - Lijie Zhang
- Department of Immunology, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, P. R. China
| | - Jieying Chen
- Department of Immunology, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, P. R. China
| | - Pengpeng Liu
- Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy, Tianjin, P. R. China
| | - Hui Li
- Department of Immunology, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, P. R. China.,Department of Gastrointestinal Cancer Biology, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy, Tianjin, P. R. China
| | - Feng Wei
- Department of Immunology, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, P. R. China
| | - Wenwen Yu
- Department of Immunology, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, P. R. China
| | - Xiubao Ren
- Department of Immunology, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, P. R. China
| | - Jinpu Yu
- Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy, Tianjin, P. R. China.,Department of Immunology, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, P. R. China
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13
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Lénárd L, László K, Kertes E, Ollmann T, Péczely L, Kovács A, Kállai V, Zagorácz O, Gálosi R, Karádi Z. Substance P and neurotensin in the limbic system: Their roles in reinforcement and memory consolidation. Neurosci Biobehav Rev 2018; 85:1-20. [DOI: 10.1016/j.neubiorev.2017.09.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 08/24/2017] [Accepted: 09/02/2017] [Indexed: 12/18/2022]
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14
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Emrarian I, Sadeghzadeh N, Abedi SM, Abediankenari S. New neurotensin analogue radiolabeled by 99m-technetium as a potential agent for tumor identification. Chem Biol Drug Des 2017; 91:304-313. [DOI: 10.1111/cbdd.13082] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/24/2017] [Accepted: 07/27/2017] [Indexed: 01/20/2023]
Affiliation(s)
- Iman Emrarian
- Department of Radiopharmacy; Faculty of Pharmacy; Mazandaran University of Medical Sciences; Sari Iran
| | - Nourollah Sadeghzadeh
- Department of Radiopharmacy; Faculty of Pharmacy; Mazandaran University of Medical Sciences; Sari Iran
| | - Seyed Mohammad Abedi
- Department of Radiology; Faculty of Medicine; Mazandaran University of Medical Sciences; Sari Iran
| | - Saeid Abediankenari
- Immunogenetics Research Center; Mazandaran University of Medical Sciences; Sari Iran
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15
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Besserer-Offroy É, Brouillette RL, Lavenus S, Froehlich U, Brumwell A, Murza A, Longpré JM, Marsault É, Grandbois M, Sarret P, Leduc R. The signaling signature of the neurotensin type 1 receptor with endogenous ligands. Eur J Pharmacol 2017; 805:1-13. [DOI: 10.1016/j.ejphar.2017.03.046] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/15/2017] [Accepted: 03/21/2017] [Indexed: 12/17/2022]
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16
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Simeth NA, Bause M, Dobmeier M, Kling RC, Lachmann D, Hübner H, Einsiedel J, Gmeiner P, König B. NTS2-selective neurotensin mimetics with tetrahydrofuran amino acids. Bioorg Med Chem 2017; 25:350-359. [DOI: 10.1016/j.bmc.2016.10.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/20/2016] [Accepted: 10/31/2016] [Indexed: 01/10/2023]
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17
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Zhang G, Wang K, Li XD, Zhang DL, Xu F. Discovery of novel antagonists of human neurotensin receptor 1 on the basis of ligand and protein structure. Biomed Pharmacother 2016; 84:147-157. [DOI: 10.1016/j.biopha.2016.09.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 09/08/2016] [Accepted: 09/08/2016] [Indexed: 12/25/2022] Open
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18
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19
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Bolivar JH, Muñoz-García JC, Castro-Dopico T, Dijkman PM, Stansfeld PJ, Watts A. Interaction of lipids with the neurotensin receptor 1. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:1278-87. [DOI: 10.1016/j.bbamem.2016.02.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 02/02/2016] [Accepted: 02/24/2016] [Indexed: 10/22/2022]
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20
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Umezu K, Hiradate Y, Oikawa T, Ishiguro H, Numabe T, Hara K, Tanemura K. Exogenous neurotensin modulates sperm function in Japanese Black cattle. J Reprod Dev 2016; 62:409-14. [PMID: 27210588 PMCID: PMC5004797 DOI: 10.1262/jrd.2016-055] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Recently, the conception rates after artificial insemination have been pointed out
to decline continuously. To overcome this problem, the control of frozen and thawed
sperm quality is required. However, the mechanism of bovine sperm functional
regulation is still largely unknown. In mammals, the ejaculated sperm are capable of
showing fertilizing ability during migration in the female reproductive organs. It is
well known that these female organs secrete several factors contributing to sperm
capacitation. We previously reported that neurotensin (NT) secreted from the oviduct
and cumulus cells enhanced sperm capacitation and acrosome reaction in mice. In this
study, we confirmed the expression of the NT receptor (NTR1) in the bovine sperm neck
region and the secretion of NT in the bovine uterus and oviduct. The similar
expression patterns of NT and NTR1 suggests a conserved mechanism of sperm functional
regulation between mouse and cattle. Thus, we examined the effects of exogenous NT on
the bovine sperm functions. First, we showed that NT induced sperm protein tyrosine
phosphorylation in a dose-dependent manner, suggesting that NT enhances sperm
capacitation. Second, we showed that NT induced acrosome reactions of capacitated
sperm in a dose-dependent manner, suggesting that NT facilitates acrosome reaction.
Finally, we used a computer-aided sperm analysis system to show that NT did not have
a great effect on sperm motility. These results suggest that NT acts as a facilitator
of sperm capacitation and acrosome reaction in the female reproductive tracts in
cattle, highlighting the importance of NT-mediated signaling to regulate sperm
functions.
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Affiliation(s)
- Kohei Umezu
- Laboratory of Animal Reproduction and Development, Graduate School of Agricultural Science, Tohoku University, Miyagi 981-8555, Japan
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21
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Ferraro L, Tiozzo Fasiolo L, Beggiato S, Borelli AC, Pomierny-Chamiolo L, Frankowska M, Antonelli T, Tomasini MC, Fuxe K, Filip M. Neurotensin: A role in substance use disorder? J Psychopharmacol 2016; 30:112-27. [PMID: 26755548 DOI: 10.1177/0269881115622240] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Neurotensin is a tridecapeptide originally identified in extracts of bovine hypothalamus. This peptide has a close anatomical and functional relationship with the mesocorticolimbic and nigrostriatal dopamine system. Neural circuits containing neurotensin were originally proposed to play a role in the mechanism of action of antipsychotic agents. Additionally, neurotensin-containing pathways were demonstrated to mediate some of the rewarding and/or sensitizing properties of drugs of abuse.This review attempts to contribute to the understanding of the role of neurotensin and its receptors in drug abuse. In particular, we will summarize the potential relevance of neurotensin, its related compounds and neurotensin receptors in substance use disorders, with a focus on the preclinical research.
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Affiliation(s)
- Luca Ferraro
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy
| | - Laura Tiozzo Fasiolo
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Sarah Beggiato
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Andrea C Borelli
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | | | - Malgorzata Frankowska
- Laboratory of Drug Addiction Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Tiziana Antonelli
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Maria C Tomasini
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Kjell Fuxe
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Malgorzata Filip
- Laboratory of Drug Addiction Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
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22
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Dijkman PM, Watts A. Lipid modulation of early G protein-coupled receptor signalling events. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:2889-97. [DOI: 10.1016/j.bbamem.2015.08.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 07/20/2015] [Accepted: 08/10/2015] [Indexed: 11/29/2022]
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23
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Fanelli R, Besserer-Offroy É, René A, Côté J, Tétreault P, Collerette-Tremblay J, Longpré JM, Leduc R, Martinez J, Sarret P, Cavelier F. Synthesis and Characterization in Vitro and in Vivo of (l)-(Trimethylsilyl)alanine Containing Neurotensin Analogues. J Med Chem 2015; 58:7785-95. [DOI: 10.1021/acs.jmedchem.5b00841] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Roberto Fanelli
- Institut des Biomolécules
Max Mousseron, IBMM, UMR-5247, CNRS, Université Montpellier,
ENSCM, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Élie Besserer-Offroy
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Adeline René
- Institut des Biomolécules
Max Mousseron, IBMM, UMR-5247, CNRS, Université Montpellier,
ENSCM, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Jérôme Côté
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Pascal Tétreault
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Jasmin Collerette-Tremblay
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Jean-Michel Longpré
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Richard Leduc
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Jean Martinez
- Institut des Biomolécules
Max Mousseron, IBMM, UMR-5247, CNRS, Université Montpellier,
ENSCM, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Philippe Sarret
- Department
of Pharmacology and Physiology, Institut de Pharmacologie de Sherbrooke,
Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Florine Cavelier
- Institut des Biomolécules
Max Mousseron, IBMM, UMR-5247, CNRS, Université Montpellier,
ENSCM, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
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24
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Osadchii OE. Emerging role of neurotensin in regulation of the cardiovascular system. Eur J Pharmacol 2015; 762:184-92. [DOI: 10.1016/j.ejphar.2015.05.025] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 04/29/2015] [Accepted: 05/11/2015] [Indexed: 10/23/2022]
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25
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Zhang H, Dong H, Lei S. Neurotensinergic augmentation of glutamate release at the perforant path-granule cell synapse in rat dentate gyrus: Roles of L-Type Ca²⁺ channels, calmodulin and myosin light-chain kinase. Neuropharmacology 2015; 95:252-60. [PMID: 25842242 DOI: 10.1016/j.neuropharm.2015.03.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 03/23/2015] [Accepted: 03/24/2015] [Indexed: 01/12/2023]
Abstract
Neurotensin (NT) serves as a neuromodulator in the brain where it is involved in modulating a variety of physiological functions including nociception, temperature, blood pressure and cognition, and many neurological diseases such as Alzheimer's disease, schizophrenia and Parkinson's disease. Whereas there is compelling evidence demonstrating that NT facilitates cognitive processes, the underlying cellular and molecular mechanisms have not been fully determined. Because the dentate gyrus expresses high densities of NT and NT receptors, we examined the effects of NT on the synaptic transmission at the synapse formed between the perforant path (PP) and granule cells (GC) in the rats. Our results demonstrate that NT persistently increased the amplitude of the AMPA receptor-mediated EPSCs at the PP-GC synapse. NT-induced increases in AMPA EPSCs were mediated by presynaptic NTS1 receptors. NT reduced the coefficient of variation and paired-pulse ratio of AMPA EPSCs suggesting that NT facilitates presynaptic glutamate release. NT increased the release probability and the number of readily releasable vesicles with no effects on the rate of recovery from vesicle depletion. NT-mediated augmentation of glutamate release required the influx of Ca(2+) via L-type Ca(2+) channels and the functions of calmodulin and myosin light chain kinase. Our results provide a cellular and molecular mechanism to explain the roles of NT in the hippocampus.
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Affiliation(s)
- Haopeng Zhang
- Department of Basic Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA; Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, PR China
| | - Hailong Dong
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, PR China
| | - Saobo Lei
- Department of Basic Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA.
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26
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Egloff P, Deluigi M, Heine P, Balada S, Plückthun A. A cleavable ligand column for the rapid isolation of large quantities of homogeneous and functional neurotensin receptor 1 variants from E. coli. Protein Expr Purif 2015; 108:106-114. [DOI: 10.1016/j.pep.2014.10.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 10/03/2014] [Accepted: 10/10/2014] [Indexed: 12/29/2022]
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27
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Comprehensive analysis of heterotrimeric G-protein complex diversity and their interactions with GPCRs in solution. Proc Natl Acad Sci U S A 2015; 112:E1181-90. [PMID: 25733868 DOI: 10.1073/pnas.1417573112] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Agonist binding to G-protein-coupled receptors (GPCRs) triggers signal transduction cascades involving heterotrimeric G proteins as key players. A major obstacle for drug design is the limited knowledge of conformational changes upon agonist binding, the details of interaction with the different G proteins, and the transmission to movements within the G protein. Although a variety of different GPCR/G protein complex structures would be needed, the transient nature of this complex and the intrinsic instability against dissociation make this endeavor very challenging. We have previously evolved GPCR mutants that display higher stability and retain their interaction with G proteins. We aimed at finding all G-protein combinations that preferentially interact with neurotensin receptor 1 (NTR1) and our stabilized mutants. We first systematically analyzed by coimmunoprecipitation the capability of 120 different G-protein combinations consisting of αi1 or αsL and all possible βγ-dimers to form a heterotrimeric complex. This analysis revealed a surprisingly unrestricted ability of the G-protein subunits to form heterotrimeric complexes, including βγ-dimers previously thought to be nonexistent, except for combinations containing β5. A second screen on coupling preference of all G-protein heterotrimers to NTR1 wild type and a stabilized mutant indicated a preference for those Gαi1βγ combinations containing γ1 and γ11. Heterotrimeric G proteins, including combinations believed to be nonexistent, were purified, and complexes with the GPCR were prepared. Our results shed new light on the combinatorial diversity of G proteins and their coupling to GPCRs and open new approaches to improve the stability of GPCR/G-protein complexes.
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28
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Lee HK, Zhang L, Smith MD, Walewska A, Vellore NA, Baron R, McIntosh JM, White HS, Olivera BM, Bulaj G. A marine analgesic peptide, Contulakin-G, and neurotensin are distinct agonists for neurotensin receptors: uncovering structural determinants of desensitization properties. Front Pharmacol 2015; 6:11. [PMID: 25713532 PMCID: PMC4322620 DOI: 10.3389/fphar.2015.00011] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 01/12/2015] [Indexed: 11/13/2022] Open
Abstract
Neurotensin receptors have been studied as molecular targets for the treatment of pain, schizophrenia, addiction, or cancer. Neurotensin (NT) and Contulakin-G, a glycopeptide isolated from a predatory cone snail Conus geographus, share a sequence similarity at the C-terminus, which is critical for activation of neurotensin receptors. Both peptides are potent analgesics, although affinity and agonist potency of Contulakin-G toward neurotensin receptors are significantly lower, as compared to those for NT. In this work, we show that the weaker agonist properties of Contulakin-G result in inducing significantly less desensitization of neurotensin receptors and preserving their cell-surface density. Structure-activity relationship (SAR) studies suggested that both glycosylation and charged amino acid residues in Contulakin-G or NT played important roles in desensitizing neurotensin receptors. Computational modeling studies of human neurotensin receptor NTS1 and Contulakin-G confirmed the role of glycosylation in weakening interactions with the receptors. Based on available SAR data, we designed, synthesized, and characterized an analog of Contulakin-G in which the glycosylated amino acid residue, Gal-GalNAc-Thr10, was replaced by memantine-Glu10 residue. This analog exhibited comparable agonist potency and weaker desensitization properties as compared to that of Contulakin-G, while producing analgesia in the animal model of acute pain following systemic administration. We discuss our study in the context of feasibility and safety of developing NT therapeutic agents with improved penetration across the blood-brain barrier. Our work supports engineering peptide-based agonists with diverse abilities to desensitize G-protein coupled receptors and further emphasizes opportunities for conotoxins as novel pharmacological tools and drug candidates.
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Affiliation(s)
- Hee-Kyoung Lee
- Department of Medicinal Chemistry, College of Pharmacy, Skaggs Research Institute, University of Utah Salt Lake City, UT, USA
| | - Liuyin Zhang
- Department of Medicinal Chemistry, College of Pharmacy, Skaggs Research Institute, University of Utah Salt Lake City, UT, USA
| | - Misty D Smith
- Department of Pharmacology and Toxicology, University of Utah Salt Lake City, UT, USA
| | - Aleksandra Walewska
- Department of Medicinal Chemistry, College of Pharmacy, Skaggs Research Institute, University of Utah Salt Lake City, UT, USA ; Faculty of Chemistry, University of Gdansk Gdansk, Poland
| | - Nadeem A Vellore
- Department of Medicinal Chemistry, College of Pharmacy, Skaggs Research Institute, University of Utah Salt Lake City, UT, USA
| | - Riccardo Baron
- Department of Medicinal Chemistry, College of Pharmacy, Skaggs Research Institute, University of Utah Salt Lake City, UT, USA
| | - J Michael McIntosh
- Department of Biology, University of Utah Salt Lake City, UT, USA ; Department of Psychiatry, University of Utah Salt Lake City, UT, USA
| | - H Steve White
- Department of Pharmacology and Toxicology, University of Utah Salt Lake City, UT, USA
| | | | - Grzegorz Bulaj
- Department of Medicinal Chemistry, College of Pharmacy, Skaggs Research Institute, University of Utah Salt Lake City, UT, USA
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29
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Zhang H, Dong H, Cilz NI, Kurada L, Hu B, Wada E, Bayliss DA, Porter JE, Lei S. Neurotensinergic Excitation of Dentate Gyrus Granule Cells via Gαq-Coupled Inhibition of TASK-3 Channels. Cereb Cortex 2014; 26:977-90. [PMID: 25405940 DOI: 10.1093/cercor/bhu267] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Neurotensin (NT) is a 13-amino acid peptide and serves as a neuromodulator in the brain. Whereas NT has been implicated in learning and memory, the underlying cellular and molecular mechanisms are ill-defined. Because the dentate gyrus receives profound innervation of fibers containing NT and expresses high density of NT receptors, we examined the effects of NT on the excitability of dentate gyrus granule cells (GCs). Our results showed that NT concentration dependently increased action potential (AP) firing frequency of the GCs by the activation of NTS1 receptors resulting in the depolarization of the GCs. NT-induced enhancement of AP firing frequency was not caused indirectly by releasing glutamate, GABA, acetylcholine, or dopamine, but due to the inhibition of TASK-3 K(+) channels. NT-mediated excitation of the GCs was G protein dependent, but independent of phospholipase C, intracellular Ca(2+) release, and protein kinase C. Immunoprecipitation experiment demonstrates that the activation of NTS1 receptors induced the association of Gαq/11 and TASK-3 channels suggesting a direct coupling of Gαq/11 to TASK-3 channels. Endogenously released NT facilitated the excitability of the GCs contributing to the induction of long-term potentiation at the perforant path-GC synapses. Our results provide a cellular mechanism that helps to explain the roles of NT in learning and memory.
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Affiliation(s)
- Haopeng Zhang
- Department of Basic Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, People's Republic of China
| | - Hailong Dong
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, People's Republic of China
| | - Nicholas I Cilz
- Department of Basic Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA
| | - Lalitha Kurada
- Department of Basic Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA
| | - Binqi Hu
- Department of Basic Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA
| | - Etsuko Wada
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, Tokyo, Japan
| | - Douglas A Bayliss
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - James E Porter
- Department of Basic Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA
| | - Saobo Lei
- Department of Basic Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA
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Adamson RJ, Watts A. Kinetics of the early events of GPCR signalling. FEBS Lett 2014; 588:4701-7. [PMID: 25447525 PMCID: PMC4266533 DOI: 10.1016/j.febslet.2014.10.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 10/10/2014] [Accepted: 10/27/2014] [Indexed: 11/28/2022]
Abstract
Little is known of the kinetics of interactions between GPCRs and their signalling partners. NTS1 binds Gαi1 and Gαs with affinities of 15 ± 6 nM and 31 ± 18 nM (SE), respectively. This SPR assay may be applicable to multiple partners in the signalling cascade. We provide the first direct evidence for GPCR-G protein coupling in nanodiscs.
Neurotensin receptor type 1 (NTS1) is a G protein-coupled receptor (GPCR) that affects cellular responses by initiating a cascade of interactions through G proteins. The kinetic details for these interactions are not well-known. Here, NTS1-nanodisc-Gαs and Gαi1 interactions were studied. The binding affinities of Gαi1 and Gαs to NTS1 were directly measured by surface plasmon resonance (SPR) and determined to be 15 ± 6 nM and 31 ± 18 nM, respectively. This SPR configuration permits the kinetics of early events in signalling pathways to be explored and can be used to initiate descriptions of the GPCR interactome.
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Affiliation(s)
- Roslin J Adamson
- Biomembrane Structure Unit, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Anthony Watts
- Biomembrane Structure Unit, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.
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Vadnie CA, Park JH, Abdel Gawad N, Ho AMC, Hinton DJ, Choi DS. Gut-brain peptides in corticostriatal-limbic circuitry and alcohol use disorders. Front Neurosci 2014; 8:288. [PMID: 25278825 PMCID: PMC4166902 DOI: 10.3389/fnins.2014.00288] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 08/26/2014] [Indexed: 12/22/2022] Open
Abstract
Peptides synthesized in endocrine cells in the gastrointestinal tract and neurons are traditionally considered regulators of metabolism, energy intake, and appetite. However, recent work has demonstrated that many of these peptides act on corticostriatal-limbic circuitry and, in turn, regulate addictive behaviors. Given that alcohol is a source of energy and an addictive substance, it is not surprising that increasing evidence supports a role for gut-brain peptides specifically in alcohol use disorders (AUD). In this review, we discuss the effects of several gut-brain peptides on alcohol-related behaviors and the potential mechanisms by which these gut-brain peptides may interfere with alcohol-induced changes in corticostriatal-limbic circuitry. This review provides a summary of current knowledge on gut-brain peptides focusing on five peptides: neurotensin, glucagon-like peptide 1, ghrelin, substance P, and neuropeptide Y. Our review will be helpful to develop novel therapeutic targets for AUD.
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Affiliation(s)
- Chelsea A Vadnie
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine Rochester, MN, USA ; Neurobiology of Disease Program, Mayo Clinic College of Medicine Rochester, MN, USA
| | - Jun Hyun Park
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine Rochester, MN, USA ; Department of Psychiatry, Sanggye Paik Hospital, College of Medicine, InJe University Seoul, South Korea
| | - Noha Abdel Gawad
- Department of Psychiatry and Psychology, Mayo Clinic College of Medicine Rochester, MN, USA
| | - Ada Man Choi Ho
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine Rochester, MN, USA ; Department of Psychiatry and Psychology, Mayo Clinic College of Medicine Rochester, MN, USA
| | - David J Hinton
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine Rochester, MN, USA ; Neurobiology of Disease Program, Mayo Clinic College of Medicine Rochester, MN, USA
| | - Doo-Sup Choi
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine Rochester, MN, USA ; Neurobiology of Disease Program, Mayo Clinic College of Medicine Rochester, MN, USA ; Department of Psychiatry and Psychology, Mayo Clinic College of Medicine Rochester, MN, USA
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Ye Y, Liu P, Wang Y, Li H, Wei F, Cheng Y, Han L, Yu J. Neurotensin, a Novel Messenger to Cross-Link Inflammation and Tumor Invasion via Epithelial-Mesenchymal Transition Pathway. Int Rev Immunol 2014; 35:340-350. [PMID: 25215420 DOI: 10.3109/08830185.2014.952412] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Multiple cytokines and growth factors are critical for the prognosis of cancer which has been regarded as a worldwide health problem. Recently, neuropeptides, soluble factors regulating a series of functions in the central nervous system, have also been demonstrated to stimulate the proliferation and migration of tumor cells. Among these signaling peptides, the role of neurotensin (NTS) on malignancy procession has become a hot topic. The effects of NTS on tumor growth and its antiapoptosis role have already been identified. Subsequently, studies demonstrated the impact of NTS on the migration and invasion, but the molecular mechanisms involved are still unclear at present. Recently, some reports indicated that NTS could induce expression and secretion of interleukin-8 (IL-8) to promote local imflammatory response which might participate in epithelial-mesenchymal transition (EMT)-related tumor migration. In present review, we highlight the process of tumor EMT induced by NTS through stimulating IL-8 and the significance of NTS/IL-8 pathway in clinical application prospect.
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Affiliation(s)
- Yingnan Ye
- a Department of Immunology , Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy , Tianjin , P. R. China
| | - Pengpeng Liu
- b Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy , Tianjin , P. R. China
| | - Yue Wang
- a Department of Immunology , Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy , Tianjin , P. R. China
| | - Hui Li
- a Department of Immunology , Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy , Tianjin , P. R. China
| | - Feng Wei
- a Department of Immunology , Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy , Tianjin , P. R. China
| | - Yanan Cheng
- b Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy , Tianjin , P. R. China
| | - Lei Han
- b Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy , Tianjin , P. R. China
| | - Jinpu Yu
- a Department of Immunology , Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy , Tianjin , P. R. China.,b Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy , Tianjin , P. R. China.,c Biotherapy Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center of Caner, Key Laboratory of Cancer Immunology and Biotherapy , Tianjin , P. R. China
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Bai B, Cai X, Jiang Y, Karteris E, Chen J. Heterodimerization of apelin receptor and neurotensin receptor 1 induces phosphorylation of ERK(1/2) and cell proliferation via Gαq-mediated mechanism. J Cell Mol Med 2014; 18:2071-81. [PMID: 25164432 PMCID: PMC4244021 DOI: 10.1111/jcmm.12404] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 07/18/2014] [Indexed: 01/25/2023] Open
Abstract
Dimerization of G protein-coupled receptors (GPCRs) is crucial for receptor function including agonist affinity, efficacy, trafficking and specificity of signal transduction, including G protein coupling. Emerging data suggest that the cardiovascular system is the main target of apelin, which exerts an overall neuroprotective role, and is a positive regulator of angiotensin-converting enzyme 2 (ACE2) in heart failure. Moreover, ACE2 cleaves off C-terminal residues of vasoactive peptides including apelin-13, and neurotensin that activate the apelin receptor (APJ) and neurotensin receptor 1 (NTSR1) respectively, that belong to the A class of GPCRs. Therefore, based on the similar mode of modification by ACE2 at peptide level, the homology at amino acid level and the capability of forming dimers with other GPCRs, we have been suggested that APJ and NTSR1 can form a functional heterodimer. Using co-immunoprecipitation, BRET and FRET, we provided conclusive evidence of heterodimerization between APJ and NTSR1 in a constitutive and induced form. Upon agonist stimulation, hetrodimerization enhanced ERK1/2 activation and increased proliferation via activation of Gq α-subunits. These novel data provide evidence for a physiological role of APJ/NTSR1 heterodimers in terms of ERK1/2 activation and increased intracellular calcium and induced cell proliferation and provide potential new pharmaceutical targets for cardiovascular disease.
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Affiliation(s)
- Bo Bai
- Neurobiology Institute, Jining Medical University, Jining, Shandong, China
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Chanawanno K, Caporoso J, Kondeti V, Paruchuri S, Leeper TC, Herrick RS, Ziegler CJ. Facile solid phase peptide synthesis with a Re-lysine conjugate generated via a one-pot procedure. Dalton Trans 2014; 43:11452-5. [PMID: 24875597 DOI: 10.1039/c4dt01129e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We have synthesized a Re(CO)3-modified lysine via a one-pot Schiff base formation reaction that can be used in the solid phase peptide synthesis. To demonstrate its potential use, we have attached it to a neurotensin fragment and observed uptake into human umbilical vascular endothelial cells.
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Affiliation(s)
- Kullapa Chanawanno
- Department of Chemistry, University of Akron, Akron, OH 44325-3601, USA.
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Gagnon A, Walsh M, Okuda T, Choe KY, Zaelzer C, Bourque CW. Modulation of spike clustering by NMDA receptors and neurotensin in rat supraoptic nucleus neurons. J Physiol 2014; 592:4177-86. [PMID: 25063824 DOI: 10.1113/jphysiol.2014.275602] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Magnocellular neurosecretory cells (MNCs) in the rat supraoptic nucleus display clustered firing during hyperosmolality or dehydration. This response is beneficial because this type of activity potentiates vasopressin secretion from axon terminals in the neurohypophysis and thus promotes homoeostatic water reabsorption from the kidney. However, the mechanisms which lead to the generation of clustering activity in MNCs remain unknown. Previous work has shown that clustered firing can be induced in these neurons through the pharmacological activation of NMDA receptors (NMDARs) and that silent pauses observed during this activity are mediated by apamin-sensitive calcium activated potassium (SK) channels. However, it remains unknown if clustered firing can be induced in situ by endogenous glutamate release from axon terminals. Here we show that electrical stimulation of glutamatergic osmosensory afferents in the organum vasculosum lamina terminalis (OVLT) can promote clustering in MNCs via NMDARs and apamin-sensitive channels.We also show that the rate of spike clustering induced by NMDA varies as a bell-shaped function of voltage, and that partial inhibition of SK channels can increase cluster duration and reduce the rate of clustering. Finally,we show that MNCs express neurotensin type 2 receptors, and that activation of these receptors can simultaneously depolarize MNCs and suppress clustered firing induced by bath application of NMDA or by repetitive stimulation of glutamate afferents. These studies reveal that spike clustering can be induced in MNCs by glutamate release from afferent nerve terminals and that that this type of activity can be fine-tuned by neuromodulators such as neurotensin.
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Affiliation(s)
- Ariane Gagnon
- Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre, Montreal QC, Canada H3G 1A4
| | - Michael Walsh
- Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre, Montreal QC, Canada H3G 1A4
| | - Tika Okuda
- Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre, Montreal QC, Canada H3G 1A4
| | - Katrina Y Choe
- Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre, Montreal QC, Canada H3G 1A4
| | - Cristian Zaelzer
- Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre, Montreal QC, Canada H3G 1A4
| | - Charles W Bourque
- Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre, Montreal QC, Canada H3G 1A4
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Hiradate Y, Inoue H, Kobayashi N, Shirakata Y, Suzuki Y, Gotoh A, Roh SG, Uchida T, Katoh K, Yoshida M, Sato E, Tanemura K. Neurotensin enhances sperm capacitation and acrosome reaction in mice. Biol Reprod 2014; 91:53. [PMID: 25031361 DOI: 10.1095/biolreprod.113.112789] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Neurotensin (NT) has multiple functions, ranging from acting as a neurotransmitter to regulating intestinal movement. However, its function in reproductive physiology is unknown. Here, we confirmed the expression and localization of NT receptors (NTR1) in mouse epididymal spermatozoa and investigated the effect of NT on sperm function. Sperm protein tyrosine phosphorylation, one of the indices of sperm capacitation, was facilitated dose-dependently by NT administration. In addition, the acrosome reaction was promoted in capacitated spermatozoa, and addition of a selective antagonist of NTR1 and NTR2 blocked the induction. Furthermore, intracellular calcium mobilization by NT addition was observed. This showed that NT was an accelerator of sperm function via its functional receptors. The presence of NT was confirmed by immunohistochemistry and its localization was observed in epithelia of the uterus and oviduct isthmus and ampulla, which correspond to the fertilization route of spermatozoa. The NT mRNA level in ovulated cumulus cell was remarkably increased by treatment with human chorionic gonadotropin (hCG). Using an in vitro maturation model, we analyzed the effects of FSH, epidermal growth factor (EGF), estradiol, and progesterone in NT production in cumulus cells. We found that FSH and EGF upregulated NT release and mRNA expression. Both FSH- and EGF-induced upregulation were inhibited by U0126, an MAPK kinase inhibitor, indicating that FSH and EGF regulate NT expression via a MAPK-dependent pathway. This evidence suggests that NT can act as a promoter of sperm capacitation and the acrosome reaction in the female reproductive tract.
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Affiliation(s)
- Yuuki Hiradate
- Laboratory of Animal Reproduction, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Hiroki Inoue
- Laboratory of Animal Reproduction, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Norio Kobayashi
- Laboratory of Animal Reproduction, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Yoshiki Shirakata
- Laboratory of Animal Reproduction, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Yutaka Suzuki
- Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Aina Gotoh
- Laboratory of Enzymology, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Sang-Gun Roh
- Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Takafumi Uchida
- Laboratory of Enzymology, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Kazuo Katoh
- Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Manabu Yoshida
- Misaki Marine Biological Station, Graduate School of Science, University of Tokyo, Kanagawa, Japan
| | - Eimei Sato
- National Livestock Breeding, Fukushima, Japan
| | - Kentaro Tanemura
- Laboratory of Animal Reproduction, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
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Ishii J, Oda A, Togawa S, Fukao A, Fujiwara T, Ogino C, Kondo A. Microbial fluorescence sensing for human neurotensin receptor type 1 using Gα-engineered yeast cells. Anal Biochem 2014; 446:37-43. [DOI: 10.1016/j.ab.2013.10.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Revised: 10/04/2013] [Accepted: 10/10/2013] [Indexed: 12/12/2022]
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Baxendale IR, Cheung S, Kitching MO, Ley SV, Shearman JW. The synthesis of neurotensin antagonist SR 48692 for prostate cancer research. Bioorg Med Chem 2013; 21:4378-87. [PMID: 23721919 DOI: 10.1016/j.bmc.2013.04.075] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2013] [Revised: 04/18/2013] [Accepted: 04/20/2013] [Indexed: 01/03/2023]
Abstract
An improved synthesis of the molecule SR 48692 is presented and its use as a neurotensin antagonist biological probe for use in cancer research is described. The preparation includes an number of enhanced chemical conversions and strategies to overcome some of the limiting synthetic transformations in the original chemical route.
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Affiliation(s)
- I R Baxendale
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom.
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Khatun UL, Goswami SK, Mukhopadhyay C. Modulation of the neurotensin solution structure in the presence of ganglioside GM1 bicelle. Biophys Chem 2012; 168-169:48-59. [DOI: 10.1016/j.bpc.2012.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 06/25/2012] [Accepted: 06/26/2012] [Indexed: 01/16/2023]
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40
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Rosin C, López Ordieres MG, Rodríguez de Lores Arnaiz G. Neurotensin decreases high affinity [3H]-ouabain binding to cerebral cortex membranes. ACTA ACUST UNITED AC 2011; 172:35-40. [DOI: 10.1016/j.regpep.2011.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 07/01/2011] [Accepted: 08/15/2011] [Indexed: 01/07/2023]
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da Silva L, Neves BM, Moura L, Cruz MT, Carvalho E. Neurotensin downregulates the pro-inflammatory properties of skin dendritic cells and increases epidermal growth factor expression. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2011; 1813:1863-71. [PMID: 21767580 DOI: 10.1016/j.bbamcr.2011.06.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Revised: 06/07/2011] [Accepted: 06/29/2011] [Indexed: 10/18/2022]
Abstract
In the last decades some reports reveal the neuropeptide neurotensin (NT) as an immune mediator in the Central Nervous System and in the gastrointestinal tract, however its effects on skin immunity were not identified. The present study investigates the effect of NT on signal transduction and on pro/anti-inflammatory function of skin dendritic cells. Furthermore, we investigated how neurotensin can modulate the inflammatory responses triggered by LPS in skin dendritic cells. We observed that fetal-skin dendritic cells (FSDCs) constitutively express NTR1 and NTR3 (neurotensin receptors) and that LPS treatment induces neurotensin expression. In addition, NT downregulated the activation of the inflammatory signaling pathways NF-κB and JNK, as well as, the expression of the cytokines IL-6, TNF-α, IL-10 and the vascular endothelial growth factor (VEGF), while the survival pathway ERK and epidermal growth factor (EGF) were upregulated. Simultaneous dendritic cells exposure to LPS and NT induced a similar cytokine profile to that one induced by NT alone. However, cells pre-treated with NT and then incubated with LPS, completely changed their cytokine profile, upregulating the cytokines tested, without changes on growth factor expression. Overall, our results could open new perspectives in the design of new therapies for skin diseases, like diabetic wound healing, where neuropeptide exposure seems to be beneficial.
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Affiliation(s)
- Lucília da Silva
- Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Coimbra, Portugal
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Azriel Y, Liu L, Burcher E, Bucher E. Complex actions of neurotensin in ascending and sigmoid colonic muscle: Involvement of enteric mediators. Eur J Pharmacol 2010; 644:195-202. [PMID: 20615399 DOI: 10.1016/j.ejphar.2010.06.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 06/11/2010] [Accepted: 06/24/2010] [Indexed: 01/07/2023]
Abstract
The brain-gut peptide neurotensin has complex effects on gastrointestinal smooth muscle. Our objective was to elucidate the mechanisms underlying neurotensin contractions in human colon. Discrete concentration response curves to neurotensin were obtained in strips of circular muscle and taenia coli from "normal" ascending and sigmoid colon segments, in the presence and absence of various pharmacological inhibitors. Potency of neurotensin in all regions was similar (pD(2) ~7). Atropine and the selective muscarinic receptor antagonists, methoctramine and darifenacin, had no effect on neurotensin contractions. In ascending colon circular muscle, responses were enhanced by indomethacin (indicating inhibitory prostaglandin mechanisms) and by tetrodotoxin (TTX), hexamethonium and L-NAME, suggesting nicotinic and enteric inhibitory neurotransmission, with involvement of nitric oxide. In sigmoid circular muscle, neurotensin responses were also enhanced by TTX and hexamethonium, but were attenuated in the presence of mepyramine, MEN10627 and CP99994, suggesting inhibitory neuronal mechanisms and involvement of histamine and tachykinins, respectively; L-NAME and the GABA(B) receptor antagonist, CGP36742, were without effect. The transcripts of NTS1 and NTS3 receptors, but not NTS2 receptors, were detected in sigmoid colon circular muscle and taenia coli. No age and gender differences in NTS1 mRNA expression were found. In conclusion, neurotensin contracts circular muscle strips from ascending and sigmoid regions of the human colon via direct (muscle) and indirect (neuronal/non-neuronal mechanisms). The enteric mediators influenced by neurotensin are regionally specific. In taenia coli strips from both ascending and sigmoid colon, neurotensin contractions were unchanged in the presence of inhibitors, suggesting direct actions only.
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Affiliation(s)
- Yael Azriel
- Department of Pharmacology, School of Medical Sciences, University of New South Wales, Sydney, Australia
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Feifel D, Pang Z, Shilling PD, Melendez G, Schreiber R, Button D. Effects of neurotensin-2 receptor deletion on sensorimotor gating and locomotor activity. Behav Brain Res 2010; 212:174-8. [PMID: 20399236 DOI: 10.1016/j.bbr.2010.04.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 04/02/2010] [Accepted: 04/07/2010] [Indexed: 12/13/2022]
Abstract
Endogenous neurotensin (NT) has been implicated in brain processes relevant to schizophrenia as well as the therapeutic effects of antipsychotic drugs (APDs) used to treat this disorder. Converging evidence suggests that NT1 receptors mediate the antipsychotic-like effects of NT, such as prepulse inhibition (PPI) elevation. However, the role of NT2 receptors in these effects is not known. To investigate the contribution of NT2 receptors to the regulation of PPI, we measured baseline PPI and acoustic startle response (ASR), in male and female wild type (WT) and NT2 knockout (KO) mice. For comparison, we also measured locomotor activity. Baseline PPI was significantly elevated in both male (P<0.01) and female (P<0.01) NT2 KO compared to WT mice, while ASR was significantly decreased in KO mice of both genders (P<0.01). In contrast, female but not male KO mice exhibited significantly less baseline ambulations (P<0.05). These data support the regulation of baseline PPI, ASR and locomotor activity by endogenous NT acting at the NT2 receptor. Further studies investigating the role of NT2 receptors in the modulation of APD-like effects are warranted.
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Affiliation(s)
- David Feifel
- Department of Psychiatry, University of California, San Diego, La Jolla, CA 92093, USA.
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Gandou C, Ohtani A, Senzaki K, Shiga T. Neurotensin promotes the dendrite elongation and the dendritic spine maturation of the cerebral cortex in vitro. Neurosci Res 2010; 66:246-55. [DOI: 10.1016/j.neures.2009.11.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Revised: 11/16/2009] [Accepted: 11/17/2009] [Indexed: 01/07/2023]
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Intermolecular cross-talk between NTR1 and NTR2 neurotensin receptor promotes intracellular sequestration and functional inhibition of NTR1 receptors. Biochem Biophys Res Commun 2010; 391:1007-13. [DOI: 10.1016/j.bbrc.2009.12.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 12/01/2009] [Indexed: 12/31/2022]
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Myers RM, Shearman JW, Kitching MO, Ramos-Montoya A, Neal DE, Ley SV. Cancer, chemistry, and the cell: molecules that interact with the neurotensin receptors. ACS Chem Biol 2009; 4:503-25. [PMID: 19462983 DOI: 10.1021/cb900038e] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The literature covering neurotensin (NT) and its signalling pathways, receptors, and biological profile is complicated by the fact that the discovery of three NT receptor subtypes has come to light only in recent years. Moreover, a lot of this literature explores NT in the context of the central nervous system and behavioral studies. However, there is now good evidence that the up-regulation of NT is intimately involved in cancer development and progression. This Review aims to summarize the isolation, cloning, localization, and binding properties of the accepted receptor subtypes (NTR1, NTR2, and NTR3) and the molecules known to bind at these receptors. The growing role these targets are playing in cancer research is also discussed. We hope this Review will provide a useful overview and a one-stop resource for new researchers engaged in this field at the chemistry-biology interface.
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Affiliation(s)
- Rebecca M. Myers
- Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - James W. Shearman
- Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Matthew O. Kitching
- Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Antonio Ramos-Montoya
- CRUK-Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, United Kingdom
| | - David E. Neal
- CRUK-Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, United Kingdom
| | - Steven V. Ley
- Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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Feifel D, Goldenberg J, Melendez G, Shilling PD. The acute and subchronic effects of a brain-penetrating, neurotensin-1 receptor agonist on feeding, body weight and temperature. Neuropharmacology 2009; 58:195-8. [PMID: 19596358 DOI: 10.1016/j.neuropharm.2009.07.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Revised: 06/30/2009] [Accepted: 07/02/2009] [Indexed: 12/27/2022]
Abstract
The neurotensin-1 (NT1) receptor has been implicated in mediating a number of important neurotensin effects. We have found that PD149163, a selective, brain-penetrating, NT1 receptor agonist, produces a number of therapeutic-like preclinical effects after peripheral administration including pro-cognitive, antipsychotic and anxiolytic effects. In this study, we investigated PD149163's effect on food intake and thermal regulation, two physiological processes thought to be mediated by NT1 receptors. Brown Norway rats and leptin-deficient mice (ob/ob) mice were administered subcutaneous PD149163 (0, 0.1, 0.25, or 1 mg/kg) for ten consecutive days. Weight and 24-h food intake were measured in mice and rats and core body temperature was also measured in rats. PD149163 significantly decreased food intake in rats and ob/ob mice and no tolerance was demonstrated to this effect over the course of the study. PD149163-treated animals exhibited weight loss compared to saline-treated animals. PD149163 produced hypothermia as expected but this effect did show tolerance over the course of the study, unlike feeding. The results suggest that NT1 receptor agonists are candidates for treatment of obesity and that somewhat different mechanisms are involved in NT1-induced feeding regulation and temperature regulation.
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Affiliation(s)
- David Feifel
- Department of Psychiatry, University of California, San Diego Medical Center, 200 West Arbor Drive, San Diego, CA 92103-8218, USA.
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Clozapine administration modifies neurotensin effect on synaptosomal membrane Na+, K+ -ATPase activity. Neurochem Res 2009; 34:2226-32. [PMID: 19562485 DOI: 10.1007/s11064-009-0018-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2009] [Indexed: 10/20/2022]
Abstract
Na+, K+-ATPase is inhibited by neurotensin, an effect which involves the peptide high affinity receptor (NTS1). Neurotensin effect on cerebral cortex synaptosomal membrane Na+, K+-ATPase activity of rats injected i.p. with antipsychotic clozapine was studied. Whereas 3.5 x 10(-6) M neurotensin decreased 44% Na+, K+-ATPase activity in the controls, the peptide failed to modify enzyme activity 30 min after a single 3.0, 10.0 and 30.0 mg/kg clozapine dose. Neurotensin decreased Na+, K+-ATPase activity 40 or 20% 18 h after 3.0 or 5.6 mg/kg clozapine administration, respectively, and lacked inhibitory effect 18 h after 17.8 and 30.0 mg/kg clozapine doses. Results indicated that the clozapine treatment differentially modifies the further effect of neurotensin on synaptosomal membrane Na+, K+-ATPase activity according to time and dose conditions employed. Taken into account that clozapine blocks the dopaminergic D2 receptor, findings obtained favor the view of an interplay among neurotensinergic receptor, dopaminergic D2 receptor and Na+, K+-ATPase at synaptic membranes.
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Ramos-Ortolaza DL, Negrón A, Cruz D, Falcón E, Iturbe MC, Cajigas MH, Maldonado-Vlaar CS. Intra-accumbens shell injections of SR48692 enhanced cocaine self-administration intake in rats exposed to an environmentally-elicited reinstatement paradigm. Brain Res 2009; 1280:124-36. [PMID: 19442653 DOI: 10.1016/j.brainres.2009.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2008] [Revised: 04/29/2009] [Accepted: 05/06/2009] [Indexed: 02/08/2023]
Abstract
Neurotensin (NT) is a neuropeptide involved in cocaine reward, and in learning and memory processes related to drug use within the mesolimbic dopamine (DA) system. Studies have demonstrated that NT receptor antagonists have potential as pharmacotherapeutical tools for cocaine abuse. Therefore, it is important to understand the molecular profile of NT within mesolimbic neurons and the behavioral effects of NT receptor inhibitors on environmentally-elicited cocaine seeking behavior. To address this issue, male Sprague Dawley rats were trained to self-administer cocaine and to discriminate between environmental cues signaling cocaine vs. saline availability. Then, following extinction, these cues were used to induce reinstatement of cocaine seeking behavior. A differential expression profile was observed throughout the experiment. Particularly, a significant increase of NT levels was observed within the nucleus accumbens (NAc) shell subregion during the acquisition phase of training. To further examine the implications of this increase, separate groups of animals received intra NAc shell injections of one of three doses (25, 50, 100 nM) of the NT1 receptor antagonist SR48692 after reaching stable self-administration. Animals were injected prior to placement in the operant conditioning chambers for four consecutive sessions. An increase in lever pressing was observed following antagonist treatment, whereas no major changes in locomotor activity were observed. We propose that the observed increase in lever pressing may be a compensatory response to a decrease in reinforcement, possibly due to decreased DA release, as previous studies show that chronic SR48692 decreases basal DA release in the NAc shell.
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Heakal Y, Kester M. Nanoliposomal short-chain ceramide inhibits agonist-dependent translocation of neurotensin receptor 1 to structured membrane microdomains in breast cancer cells. Mol Cancer Res 2009; 7:724-34. [PMID: 19435815 DOI: 10.1158/1541-7786.mcr-08-0322] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Neurotensin (NTS) receptor 1 (NTSR1) is a G protein-coupled receptor that has been recently identified as a mediator of tumorigenicity and metastasis. NTSR1, as well as its endogenous ligand, NTS, are coexpressed in several breast cancer cell lines and breast cancer tumor samples but not in normal breast tissue. We have previously published that ceramide mimetics could inhibit breast cancer growth in vitro and in vivo. Thus, understanding the biochemical and biophysical regulation of NTSR1 by ceramide can help further define NTSR1 as a novel target in breast cancer. Our results show that nanoliposomal formulations of ceramide inhibit NTSR1-mediated MDA-MB-231 breast cancer progression (mitogenesis, migration, and matrix metalloproteinase-9 activity). In addition, liposomal ceramide inhibited NTSR1-mediated, but not phorbol 12-myristate 13-acetate-mediated, activation of the mitogen-activated protein kinase pathway. Mechanistically, nanoliposomal short-chain ceramide reduces NTSR1 interaction with Galphaq/11 subunits within structured membrane microdomains, consistent with diminished NTS-induced translocation of NTSR1 into membrane microdomains. Collectively, our findings suggest that exogenous short-chain ceramide has the potential to be used as an adjuvant therapy to inhibit NTS-dependent breast cancer progression.
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Affiliation(s)
- Yasser Heakal
- Department of Pharmacology, The Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA 17033, USA
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