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https://www.readbyqxmd.com/read/28108848/glucagon-like-peptide-1-is-co-localized-with-neurotensin-in-the-chicken-ileum
#1
Kei Nishimura, Kohzy Hiramatsu, Takafumi Watanabe, Kazumi Kita
Glucagon-like peptide (GLP)-1 and neurotensin (NT) are distributed throughout the chicken ileum. Here, we attempt to determine if GLP-1 and NT co-localize in the chicken ileum by using immunofluorescence, immunocytochemistry and in situ hybridization techniques. Three types of enteroendocrine cells, GLP-1(+)/NT(+), GLP-1(+)/NT(-) and GLP-1(-)/NT(+) cells, were detected in the mucosal epithelium by the double immunofluorescence method. The ratio of GLP-1(+)/NT(+) cells at the crypts in the distal ileum was significantly higher than that in the proximal ileum...
January 20, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28094875/neuroendocrinology-of-mast-cells-challenges-and-controversies
#2
REVIEW
Theoharis C Theoharides
Mast cells (MC) are hemopoietically-derived tissue immune cells that are ubiquitous in the body, including neuroendocrine organs such as the hypothalamus, pineal, pituitary, ovaries, pancreas and uterus where their action is not well understood. Mast cells have historically been associated with allergies because of their rich content of histamine and tryptase, but more recently with regulation of immunity and inflammation due their synthesis and release of numerous cytokines and chemokines. Mast cells are located perivascularly and express numerous receptors for diverse ligands such as allergens, pathogens, neurotransmitters, neuropeptides and hormones including acetylcholine, calcitonin gene-related peptide (CGRP), corticosteroids, corticotropin-releasing hormone (CRH), β-endorphin, epinephrine, 17β-estradiol, gonadotrophins, hemokinin-A (HKA), leptin, melatonin, neurotensin (NT), parathyroid hormone (PTH), substance P (SP) and vasoactive instestinal peptide (VIP)...
January 17, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28089918/cardiovascular-and-respiratory-activity-of-pk20-opioid-and-neurotensin-hybrid-peptide-in-anesthetized-and-awake-rats
#3
Katarzyna Kaczyńska, Piotr Wojciechowski, Monika Jampolska, Andrzej W Lipkowski, Patrycja Kleczkowska
AIM: Chimeric compound - PK20 despite its therapeutic activity on nociceptive and inflammatory processes may affect respiration and blood pressure. Our objective was to evaluate influence of the hybrid composed of endomorphin-2 and neurotensin fragments on ventilation, heart rate and blood pressure in anesthetized and awake rats. METHODS: The effects of PK20 (1mg/kg) were studied either after its intravenous administration in anesthetized rats or intraperitoneal injection in awake state...
January 12, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28089664/neurotensin-nts1-and-nts2-receptor-agonists-produce-anxiolytic-like-effects-in-the-22-khz-ultrasonic-vocalization-model-in-rats
#4
Floyd F Steele, Shannon C Whitehouse, Jacob S Aday, Adam J Prus
Neurotensin is a neuropeptide neurotransmitter that interacts with multiple neurotransmitter systems, including those regulating amygdalar function, via NTS1 and NTS2 receptors. Both receptors are expressed in the amygdala and agonists for NTS1 or NTS2 receptors have exhibited anxiolytic effects in animal models. Systemic adminstration of NTS1 receptor agonist PD149163 was recently shown to reduce footshock conditioned 22-kHz ultrasonic vocalizations in rats, suggesting that PD149163 produced an anxiolytic effect...
January 12, 2017: Brain Research
https://www.readbyqxmd.com/read/28032980/ligand-discovery-for-a-peptide-binding-gpcr-by-structure-based-screening-of-fragment-and-lead-like-chemical-libraries
#5
Anirudh Ranganathan, Philipp Heine, Axel Rudling, Andreas Plückthun, Lutz Kummer, Jens Carlsson
Peptide-recognizing G protein-coupled receptors (GPCRs) are promising therapeutic targets, but often resist drug discovery efforts. Determination of crystal structures for peptide-binding GPCRs has provided opportunities to explore structure-based methods in lead development. Molecular docking screens of two chemical libraries, containing either fragment- or lead-like compounds, against a Neurotensin receptor 1 crystal structure allowed for a comparison between different drug development strategies for peptide-binding GPCRs...
December 29, 2016: ACS Chemical Biology
https://www.readbyqxmd.com/read/28028605/neuropeptide-systems-and-new-treatments-for-nicotine-addiction
#6
REVIEW
Adriaan W Bruijnzeel
RATIONALE: The mildly euphoric and cognitive enhancing effects of nicotine play a role in the initiation of smoking, while dysphoria and anxiety associated with smoking cessation contribute to relapse. After the acute withdrawal phase, smoking cues, a few cigarettes (i.e., lapse), and stressors can cause relapse. Human and animal studies have shown that neuropeptides play a critical role in nicotine addiction. OBJECTIVES: The goal of this paper is to describe the role of neuropeptide systems in the initiation of nicotine intake, nicotine withdrawal, and the reinstatement of extinguished nicotine seeking...
December 28, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/27995402/does-the-ileal-brake-contribute-to-delayed-gastric-emptying-after-pancreatoduodenectomy
#7
REVIEW
Savio G Barreto, John A Windsor
Delayed gastric emptying (DGE) represents a significant cause for morbidity following pancreatoduodenectomy (PD). At a time when no specific and universally effective therapy exists to treat these patients, elucidating other potential (preventable or treatable) mechanisms for DGE is important. The aim of the manuscript was to test the hypothesis that ileal brake contributes to DGE in PD patients receiving jejunal tube feeding by systematically reviewing experimental and clinical literature. A series of clinically relevant questions were framed related to the potential role of the ileal brake in development of DGE post-PD and formed the basis of targeted literature searches...
December 19, 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/27932946/increased-brain-neurotensin-and-ntsr2-lead-to-weak-nociception-in-ntsr3-sortilin-knockout-mice
#8
Christelle Devader, Sébastien Moreno, Morgane Roulot, Emmanuel Deval, Thomas Dix, Carlos R Morales, Jean Mazella
The neuropeptide neurotensin (NT) elicits numerous pharmacological effects through three different receptors (NTSR1, NTSR2, and NTSR3 also called sortilin). Pharmacological approaches and generation of NTSR1 and NTSR2-deficient mice allowed to determine the NT-induced antipsychotic like behavior, the inhibitory of weak fear memory and the nociceptive signaling in a rat formalin tonic pain model to NTSR1. Conversely, the effects of NT on thermal and tonic nociceptions were mediated by NTSR2. However, the role of NTSR3/sortilin on the neurotensinergic system was not investigated...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27924846/structure-and-dynamics-of-a-constitutively-active-neurotensin-receptor
#9
Brian E Krumm, Sangbae Lee, Supriyo Bhattacharya, Istvan Botos, Courtney F White, Haijuan Du, Nagarajan Vaidehi, Reinhard Grisshammer
Many G protein-coupled receptors show constitutive activity, resulting in the production of a second messenger in the absence of an agonist; and naturally occurring constitutively active mutations in receptors have been implicated in diseases. To gain insight into mechanistic aspects of constitutive activity, we report here the 3.3 Å crystal structure of a constitutively active, agonist-bound neurotensin receptor (NTSR1) and molecular dynamics simulations of agonist-occupied and ligand-free receptor. Comparison with the structure of a NTSR1 variant that has little constitutive activity reveals uncoupling of the ligand-binding domain from conserved connector residues, that effect conformational changes during GPCR activation...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27914862/neurotensin-regulation-induces-overexpression-and-activation-of-egfr-in-hcc-and-restores-response-to-erlotinib-and-sorafenib
#10
Zherui Wu, Antoine Galmiche, Jin Liu, Nicolas Stadler, Dominique Wendum, Evelyne Segal-Bendirdjian, Valerie Paradis, Patricia Forgez
Hepatocellular carcinoma (HCC) is the third leading cause of death from cancer due to the combination of late diagnosis and a lack of curative treatments. The identification of factors which promote tumor aggressiveness, and those that predict treatment responses, are a means to optimize the management of HCC patients. The complex of Neurotensin (NTS) and its high affinity receptor (NTSR1) has been shown to induce tumor growth and metastasis process in various cancers. In this paper, we propose that NTS and NTSR1 can assist in the management of HCC...
December 1, 2016: Cancer Letters
https://www.readbyqxmd.com/read/27902570/preprotachykinin-a-ppta-is-expressed-by-a-distinct-population-of-excitatory-neurons-in-the-mouse-superficial-spinal-dorsal-horn-including-cells-that-respond-to-noxious-and-pruritic-stimuli
#11
Maria Gutierrez-Mecinas, Andrew M Bell, Alina Marin, Rebecca Taylor, Kieran A Boyle, Takahiro Furuta, Masahiko Watanabe, Erika Polgár, Andrew J Todd
The superficial dorsal horn, which is the main target for nociceptive and pruritoceptive primary afferents, contains a high density of excitatory interneurons. Our understanding of their roles in somatosensory processing has been restricted by the difficulty of distinguishing functional populations among these cells. We recently defined three non-overlapping populations among the excitatory neurons, based on the expression of neurotensin, neurokinin B (NKB) and gastrin-releasing peptide (GRP). Here we identify and characterise another population: neurons that express the tachykinin peptide substance P...
November 25, 2016: Pain
https://www.readbyqxmd.com/read/27891817/preliminary-study-of-personality-traits-in-chinese-lung-cancer-patients-modification-by-neurotensin-receptor-1-polymorphisms
#12
Hui Ma, Zhengtu Cong, Hongyu Zhang, Jiangang Tao, Chao Yang, Zhijie Song
This study recruited 148 lung cancer patients and 157 healthy Chinese individuals to evaluate the personality traits of Chinese lung cancer patients using the Tridimensional Personality Questionnaire and to investigate the associations between these traits and the rs6090453C/G and rs6011914C/G polymorphisms of the neurotensin receptor 1 gene. The results demonstrated significant differences in the Tridimensional Personality Questionnaire total and subscale scores between the 2 groups. Significant differences were found in the reward dependence 2 (RD2) score between the rs6090453C/G genotypes and in the total harm avoidance (HA), HA1, HA2, HA4, and RD2 scores between the rs6011914C/G genotypes...
November 28, 2016: Asia-Pacific Psychiatry: Official Journal of the Pacific Rim College of Psychiatrists
https://www.readbyqxmd.com/read/27844204/analysis-of-enteroendocrine-cell-populations-in-the-human-colon
#13
Patricia Martins, Josiane Fakhry, Enio Chaves de Oliveira, Billie Hunne, Linda J Fothergill, Mitchell Ringuet, Débora d'Ávila Reis, Jens F Rehfeld, Brid Callaghan, John B Furness
Recent studies have shown that patterns of colocalisation of hormones in enteroendocrine cells are more complex than previously appreciated and that the patterns differ substantially between species. In this study, the human sigmoid colon is investigated by immunohistochemistry for the presence of gastrointestinal hormones and their colocalisation. The segments of colon were distant from the pathology that led to colectomy and appeared structurally normal. Only four hormones, 5-hydroxytryptamine (5-HT), glucagon-like peptide 1 (GLP-1), peptide YY (PYY) and somatostatin, were common in enteroendocrine cells of the human colon...
November 14, 2016: Cell and Tissue Research
https://www.readbyqxmd.com/read/27842797/nts2-selective-neurotensin-mimetics-with-tetrahydrofuran-amino-acids
#14
Nadja A Simeth, Manuel Bause, Michael Dobmeier, Ralf C Kling, Daniel Lachmann, Harald Hübner, Jürgen Einsiedel, Peter Gmeiner, Burkhard König
Stimulation of the NTS2 neurotensin receptor causes antipsychotic effects and leads to a promotion of the μ-opioid-independent antinociception, which is important in the modulation of tonic pain sensitivity. We report the synthesis and properties of a small library of peptidic agonists based on the active neurotensin fragment NT(8-13). Two tetrahydrofuran amino acid derivatives were synthesized to replace Tyr(11) in NT(8-13). Additionally, Arg(8), Arg(9), and Ile(12) of the lead peptide were exchanged by Lys, Lys, and Gly, respectively...
January 1, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/27834811/focal-adhesion-kinase-dependent-role-of-the-soluble-form-of-neurotensin-receptor-3-sortilin-in-colorectal-cancer-cell-dissociation
#15
REVIEW
Sophie Béraud-Dufour, Chistelle Devader, Fabienne Massa, Morgane Roulot, Thierry Coppola, Jean Mazella
The aim of the present review is to unravel the mechanisms of action of the soluble form of the neurotensin (NT) receptor-3 (NTSR3), also called Sortilin, in numerous physiopathological processes including cancer development, cardiovascular diseases and depression. Sortilin/NTSR3 is a transmembrane protein thought to exert multiple functions both intracellularly and at the level of the plasma membrane. The Sortilin/NTSR3 extracellular domain is released by shedding from all the cells expressing the protein...
November 8, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27805786/neurotensin-conjugated-reduced-graphene-oxide-with-multi-stage-near-infrared-triggered-synergic-targeted-neuron-gene-transfection-in-vitro-and-in-vivo-for-neurodegenerative-disease-therapy
#16
Tsung-Ying Hsieh, Wei-Chen Huang, Yi-Da Kang, Chao-Yi Chu, Wen-Lin Liao, You-Yin Chen, San-Yuan Chen
Delivery efficiency with gene transfection is a pivotal point in achieving maximized therapeutic efficacy and has been an important challenge with central nervous system (CNS) diseases. In this study, neurotensin (NT, a neuro-specific peptide)-conjugated polyethylenimine (PEI)-modified reduced graphene oxide (rGO) nanoparticles with precisely controlled two-stage near-infrared (NIR)-laser photothermal treatment to enhance the ability to target neurons and achieve high gene transfection in neurons. First-stage NIR laser irradiation on the cells with nanoparticles attached on the surface can increase the permeability of the cell membrane, resulting in an apparent increase in cellular uptake compared to untreated cells...
December 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27803332/correction-for-patel-et-al-neurotensin-stimulates-sortilin-and-mtor-in-human-microglia-inhibitable-by-methoxyluteolin-a-potential-therapeutic-target-for-autism
#17
(no author information available yet)
No abstract text is available yet for this article.
November 1, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27767183/molecular-characterization-of-thy1-expressing-fear-inhibiting-neurons-within-the-basolateral-amygdala
#18
Kenneth M McCullough, Dennis Choi, Jidong Guo, Kelsey Zimmerman, Jordan Walton, Donald G Rainnie, Kerry J Ressler
Molecular characterization of neuron populations, particularly those controlling threat responses, is essential for understanding the cellular basis of behaviour and identifying pharmacological agents acting selectively on fear-controlling circuitry. Here we demonstrate a comprehensive workflow for identification of pharmacologically tractable markers of behaviourally characterized cell populations. Thy1-eNpHR-, Thy1-Cre- and Thy1-eYFP-labelled neurons of the BLA consistently act as fear inhibiting or 'Fear-Off' neurons during behaviour...
October 21, 2016: Nature Communications
https://www.readbyqxmd.com/read/27765644/binge-like-intake-of-hfd-attenuates-alcohol-intake-in-rats
#19
Sunil Sirohi, Arriel Van Cleef, Jon F Davis
Binge eating and binge alcohol intake are behavioral manifestations of pathological feeding and alcohol use disorder (AUD), respectively. Binge-feeding and AUD have high comorbidity with other psychiatric disorders such as depression, which could have important implications for the management of these conditions. Importantly, these behaviors share many common features suggesting a singular etiology. However, the nature by which binge-feeding affects the development or maintenance of AUD is unclear. The present study examined the impact of a binge-feeding from a nutritionally complete high-fat diet (HFD) on initiation and maintenance of alcohol intake, anxiolytic behavior and central genetic changes in brain regions that control alcohol-reinforced behaviors...
October 17, 2016: Physiology & Behavior
https://www.readbyqxmd.com/read/27666481/phosphatidylinositol-3-4-5-trisphosphate-binds-to-sortilin-and-competes-with-neurotensin-implications-for-very-low-density-lipoprotein-binding
#20
Robert P Sparks, Jermaine L Jenkins, Gregory E Miner, Yan Wang, Wayne C Guida, Charles E Sparks, Rutilio A Fratti, Janet D Sparks
Sortilin is a multi-ligand sorting receptor that interacts with B100-containing VLDL and LDL as well as other ligands including neurotensin (NT). The current study investigates the hypothesis that phosphatidylinositol (3,4,5)-trisphosphate (PIP3) generated downstream of insulin action can directly bind to sortilin. NT binds to sortilin at a well characterized site via its carboxy terminus (C-term). Using a crystal structure of human sortilin (hsortilin), PIP3 is predicted to bind at this C-term site. Binding of PIP3 to hsortilin is demonstrated using surface plasmon resonance (SPR) flowing PIP3 nanodiscs over immobilized hsortilin...
October 21, 2016: Biochemical and Biophysical Research Communications
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