1
|
Kundu D, Acharya S, Wang S, Kim KM. Unveiling the intracellular dynamics of α4β2 nAChR-mediated ERK activation through the interplay of arrestin, Gβγ, and PKCβII. Life Sci 2024; 355:122994. [PMID: 39163903 DOI: 10.1016/j.lfs.2024.122994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 07/28/2024] [Accepted: 08/14/2024] [Indexed: 08/22/2024]
Abstract
AIMS In contrast to G protein-coupled receptors or receptor tyrosine kinases, the mechanism underlying ERK activation through nicotine acetylcholine receptors (nAChRs), members of the ligand-gated ion channel family, remains poorly elucidated. This study aimed to delineate the signaling pathway responsible for ERK activation by the α4β2 nAChR subtype, which is implicated in nicotine addiction and various mental disorders. MATERIALS AND METHODS Loss-of-function strategies and mutants of arrestin2/PKCβII with distinct functional characteristics were employed to identify the cellular components and processes involved in ERK activation. KEY FINDINGS ERK activation via α4β2 nAChR was observed within the nucleus and necessitated the nuclear translocation of arrestin2 and PKCβII, which exhibited mutual augmentation. Activation of PKCβII by α4β2 nAChR stimulation facilitated the nuclear translocation of arrestin2 by enhancing its interaction with importin β1. Apart from scaffolding ERK activation in the nucleus, arrestin2, in cooperation with GRK2, facilitated the activation of the Src/Syk/PKCβII signaling cascade, leading to the nuclear entry of PKCβII in a Gβγ-dependent manner. Upon nuclear localization, PKCβII underwent ubiquitination by Mdm2 and interacted with MEK1, resulting in ERK activation. In summary, α4β2 nAChR-mediated ERK activation in the nucleus involves the nuclear translocation of arrestin2 and PKCβII, which is reciprocally facilitated via positive feedback augmentation. SIGNIFICANCE As α4β2 nAChRs play a pivotal role in various cellular processes including drug addiction and mental disorders, our findings will offer insights into understanding the pathogenesis of α4β2 nAChR-related disorders and may facilitate the development of targeted therapeutic interventions.
Collapse
Affiliation(s)
- Dooti Kundu
- Department of Pharmacology, College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Srijan Acharya
- Department of Pharmacology, College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Shujie Wang
- Department of Pharmacology, College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Kyeong-Man Kim
- Department of Pharmacology, College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea.
| |
Collapse
|
2
|
Pastor V, Medina JH. α7 nicotinic acetylcholine receptor in memory processing. Eur J Neurosci 2024; 59:2138-2154. [PMID: 36634032 DOI: 10.1111/ejn.15913] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 01/03/2023] [Accepted: 01/06/2023] [Indexed: 01/13/2023]
Abstract
Information storage in the brain involves different memory types and stages that are processed by several brain regions. Cholinergic pathways through acetylcholine receptors actively participate on memory modulation, and their disfunction is associated with cognitive decline in several neurological disorders. During the last decade, the role of α7 subtype of nicotinic acetylcholine receptors in different memory stages has been studied. However, the information about their role in memory processing is still scarce. In this review, we attempt to identify brain areas where α7 nicotinic receptors have an essential role in different memory types and stages. In addition, we discuss recent work implicating-or not-α7 nicotinic receptors as promising pharmacological targets for memory impairment associated with neurological disorders.
Collapse
Affiliation(s)
- Verónica Pastor
- Instituto de Biología Celular y Neurociencia "Prof. Eduardo De Robertis" (IBCN), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
- Facultad de Medicina, Departamento de Ciencias Fisiológicas, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Jorge H Medina
- Instituto de Biología Celular y Neurociencia "Prof. Eduardo De Robertis" (IBCN), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto Tecnológico de Buenos Aires (ITBA), Buenos Aires, Argentina
| |
Collapse
|
3
|
Ihnatovych I, Saddler RA, Sule N, Szigeti K. Translational implications of CHRFAM7A, an elusive human-restricted fusion gene. Mol Psychiatry 2024; 29:1020-1032. [PMID: 38200291 PMCID: PMC11176066 DOI: 10.1038/s41380-023-02389-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 12/08/2023] [Accepted: 12/15/2023] [Indexed: 01/12/2024]
Abstract
Genes restricted to humans may contribute to human-specific traits and provide a different context for diseases. CHRFAM7A is a uniquely human fusion gene and a negative regulator of the α7 nicotinic acetylcholine receptor (α7 nAChR). The α7 nAChR has been a promising target for diseases affecting cognition and higher cortical functions, however, the treatment effect observed in animal models failed to translate into human clinical trials. As CHRFAM7A was not accounted for in preclinical drug screens it may have contributed to the translational gap. Understanding the complex genetic architecture of the locus, deciphering the functional impact of CHRFAM7A on α7 nAChR neurobiology and utilizing human-relevant models may offer novel approaches to explore α7 nAChR as a drug target.
Collapse
Affiliation(s)
- Ivanna Ihnatovych
- Department of Neurology, State University of New York at Buffalo, 875 Ellicott St., Buffalo, NY, 14203, USA
| | - Ruth-Ann Saddler
- Department of Neurology, State University of New York at Buffalo, 875 Ellicott St., Buffalo, NY, 14203, USA
| | - Norbert Sule
- Roswell Park Comprehensive Cancer Center, 665 Elm St, Buffalo, NY, 14203, USA
| | - Kinga Szigeti
- Department of Neurology, State University of New York at Buffalo, 875 Ellicott St., Buffalo, NY, 14203, USA.
| |
Collapse
|
4
|
Gotti C, Clementi F, Zoli M. Auxiliary protein and chaperone regulation of neuronal nicotinic receptor subtype expression and function. Pharmacol Res 2024; 200:107067. [PMID: 38218358 DOI: 10.1016/j.phrs.2024.107067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 01/06/2024] [Accepted: 01/08/2024] [Indexed: 01/15/2024]
Abstract
Neuronal nicotinic acetylcholine receptors (nAChRs) are a family of pentameric, ligand-gated ion channels that are located on the surface of neurons and non-neuronal cells and have multiple physiological and pathophysiological functions. In order to reach the cell surface, many nAChR subtypes require the help of chaperone and/or auxiliary/accessory proteins for their assembly, trafficking, pharmacological modulation, and normal functioning in vivo. The use of powerful genome-wide cDNA screening has led to the identification and characterisation of the molecules and mechanisms that participate in the assembly and trafficking of receptor subtypes, including chaperone and auxiliary or accessory proteins. The aim of this review is to describe the latest findings concerning nAChR chaperones and auxiliary proteins and pharmacological chaperones, and how some of them control receptor biogenesis or regulate channel activation and pharmacology. Some auxiliary proteins are subtype selective, some regulate various subtypes, and some not only modulate nAChRs but also target other receptors and signalling pathways. We also discuss how changes in auxiliary proteins may be involved in nAChR dysfunctions.
Collapse
Affiliation(s)
- Cecilia Gotti
- CNR, Institute of Neuroscience, Milan, Italy; NeuroMi Milan Center for Neuroscience, University of Milano-Bicocca, Italy.
| | - Francesco Clementi
- CNR, Institute of Neuroscience, Milan, Italy; Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Milan, Italy
| | - Michele Zoli
- Department of Biomedical, Metabolic and Neural Sciences, Center for Neuroscience and Neurotechnology (CfNN), University of Modena and Reggio Emilia, Modena, Italy
| |
Collapse
|
5
|
Borkar NA, Thompson MA, Bartman CM, Khalfaoui L, Sine S, Sathish V, Prakash YS, Pabelick CM. Nicotinic receptors in airway disease. Am J Physiol Lung Cell Mol Physiol 2024; 326:L149-L163. [PMID: 38084408 PMCID: PMC11280694 DOI: 10.1152/ajplung.00268.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/27/2023] [Accepted: 11/30/2023] [Indexed: 01/26/2024] Open
Abstract
With continued smoking of tobacco products and expanded use of nicotine delivery devices worldwide, understanding the impact of smoking and vaping on respiratory health remains a major global unmet need. Although multiple studies have shown a strong association between smoking and asthma, there is a relative paucity of mechanistic understanding of how elements in cigarette smoke impact the airway. Recognizing that nicotine is a major component in both smoking and vaping products, it is critical to understand the mechanisms by which nicotine impacts airways and promotes lung diseases such as asthma. There is now increasing evidence that α7 nicotinic acetylcholine receptors (α7nAChRs) are critical players in nicotine effects on airways, but the mechanisms by which α7nAChR influences different airway cell types have not been widely explored. In this review, we highlight and integrate the current state of knowledge regarding nicotine and α7nAChR in the context of asthma and identify potential approaches to alleviate the impact of smoking and vaping on the lungs.
Collapse
Affiliation(s)
- Niyati A Borkar
- Department of Anesthesiology and Perioperative Medicine, North Dakota State University, Fargo, North Dakota, United States
| | - Michael A Thompson
- Department of Anesthesiology and Perioperative Medicine, North Dakota State University, Fargo, North Dakota, United States
| | - Colleen M Bartman
- Department of Anesthesiology and Perioperative Medicine, North Dakota State University, Fargo, North Dakota, United States
| | - Latifa Khalfaoui
- Department of Anesthesiology and Perioperative Medicine, North Dakota State University, Fargo, North Dakota, United States
| | - Steven Sine
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States
| | - Venkatachalem Sathish
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, North Dakota, United States
| | - Y S Prakash
- Department of Anesthesiology and Perioperative Medicine, North Dakota State University, Fargo, North Dakota, United States
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States
| | - Christina M Pabelick
- Department of Anesthesiology and Perioperative Medicine, North Dakota State University, Fargo, North Dakota, United States
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States
| |
Collapse
|
6
|
Arunrungvichian K, Vajragupta O, Hayakawa Y, Pongrakhananon V. Targeting Alpha7 Nicotinic Acetylcholine Receptors in Lung Cancer: Insights, Challenges, and Therapeutic Strategies. ACS Pharmacol Transl Sci 2024; 7:28-41. [PMID: 38230275 PMCID: PMC10789132 DOI: 10.1021/acsptsci.3c00138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 11/26/2023] [Accepted: 12/01/2023] [Indexed: 01/18/2024]
Abstract
Alpha7 nicotinic acetylcholine receptor (α7 nAChR) is an ion-gated calcium channel that plays a significant role in various aspects of cancer pathogenesis, particularly in lung cancer. Preclinical studies have elucidated the molecular mechanism underlying α7 nAChR-associated lung cancer proliferation, chemotherapy resistance, and metastasis. Understanding and targeting this mechanism are crucial for developing therapeutic interventions aimed at disrupting α7 nAChR-mediated cancer progression and improving treatment outcomes. Drug research and discovery have determined natural compounds and synthesized chemical antagonists that specifically target α7 nAChR. However, approved α7 nAChR antagonists for clinical use are lacking, primarily due to challenges related to achieving the desired selectivity, efficacy, and safety profiles required for effective therapeutic intervention. This comprehensive review provided insights into the molecular mechanisms associated with α7 nAChR and its role in cancer progression, particularly in lung cancer. Furthermore, it presents an update on recent evidence about α7 nAChR antagonists and addresses the challenges encountered in drug research and discovery in this field.
Collapse
Affiliation(s)
- Kuntarat Arunrungvichian
- Department
of Pharmaceutical Chemistry, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
- Unit
of Compounds Library for Drug Discovery, Mahidol University, Bangkok 10400, Thailand
| | - Opa Vajragupta
- Research
Affairs, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand
| | - Yoshihiro Hayakawa
- Institute
of Natural Medicine, University of Toyama, Toyama 930-0194, Japan
| | - Varisa Pongrakhananon
- Department
of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand
- Preclinical
Toxicity and Efficacy Assessment of Medicines and Chemicals Research
Unit, Chulalongkorn University, Bangkok 10330, Thailand
| |
Collapse
|
7
|
Sinclair P, Kabbani N. Ionotropic and metabotropic responses by alpha 7 nicotinic acetylcholine receptors. Pharmacol Res 2023; 197:106975. [PMID: 38032294 DOI: 10.1016/j.phrs.2023.106975] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/12/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023]
Abstract
Nicotinic acetylcholine receptors (nAChRs) belong to a superfamily of cys-loop receptors characterized by the assembly of five subunits into a multi-protein channel complex. Ligand binding to nAChRs activates rapid allosteric transitions of the receptor leading to channel opening and ion flux in neuronal and non-neuronal cell. Thus, while ionotropic properties of nAChRs are well recognized, less is known about ligand-mediated intracellular metabotropic signaling responses. Studies in neural and non-neural cells confirm ionotropic and metabotropic channel responses following ligand binding. In this review we summarize evidence on the existence of ionotropic and metabotropic signaling responses by homopentameric α7 nAChRs in various cell types. We explore how coordinated calcium entry through the ion channel and calcium release from nearby stores gives rise to signaling important for the modulation of cytoskeletal motility and cell growth. Amino acid residues for intracellular protein binding within the α7 nAChR support engagement in metabotropic responses including signaling through heterotrimeric G proteins in neural and immune cells. Understanding the dual properties of ionotropic and metabotropic nAChR responses is essential in advancing drug development for the treatment of various human disease.
Collapse
Affiliation(s)
| | - Nadine Kabbani
- Interdisciplinary Program in Neuroscience, Fairfax, VA, USA; School of Systems Biology, George Mason University, Fairfax, VA, USA.
| |
Collapse
|
8
|
Roa-Vidal N, Rodríguez-Aponte AS, Lasalde-Dominicci JA, Capó-Vélez CM, Delgado-Vélez M. Cholinergic Polarization of Human Macrophages. Int J Mol Sci 2023; 24:15732. [PMID: 37958716 PMCID: PMC10650439 DOI: 10.3390/ijms242115732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
Macrophages serve as vital defenders, protecting the body by exhibiting remarkable cellular adaptability in response to invading pathogens and various stimuli. These cells express nicotinic acetylcholine receptors, with the α7-nAChR being extensively studied due to its involvement in activating the cholinergic anti-inflammatory pathway. Activation of this pathway plays a crucial role in suppressing macrophages' production of proinflammatory cytokines, thus mitigating excessive inflammation and maintaining host homeostasis. Macrophage polarization, which occurs in response to specific pathogens or insults, is a process that has received limited attention concerning the activation of the cholinergic anti-inflammatory pathway and the contributions of the α7-nAChR in this context. This review aims to present evidence highlighting how the cholinergic constituents in macrophages, led by the α7-nAChR, facilitate the polarization of macrophages towards anti-inflammatory phenotypes. Additionally, we explore the influence of viral infections on macrophage inflammatory phenotypes, taking into account cholinergic mechanisms. We also review the current understanding of macrophage polarization in response to these infections. Finally, we provide insights into the relatively unexplored partial duplication of the α7-nAChR, known as dup α7, which is emerging as a significant factor in macrophage polarization and inflammation scenarios.
Collapse
Affiliation(s)
- Natalia Roa-Vidal
- Medical Sciences Campus, University of Puerto Rico, San Juan, PR 00936, USA;
| | - Adriana S. Rodríguez-Aponte
- Department of Biology, Rio Piedras Campus, University of Puerto Rico, San Juan, PR 00931, USA; (A.S.R.-A.); (C.M.C.-V.)
| | - José A. Lasalde-Dominicci
- Department of Biology, Rio Piedras Campus, University of Puerto Rico, San Juan, PR 00931, USA; (A.S.R.-A.); (C.M.C.-V.)
- Molecular Sciences Research Center, Clinical Bioreagent Center, University of Puerto Rico, San Juan, PR 00926, USA
- Department of Chemistry, Rio Piedras Campus, University of Puerto Rico, San Juan, PR 00931, USA
- Institute of Neurobiology, Medical Science Campus, University of Puerto Rico, San Juan, PR 00901, USA
| | - Coral M. Capó-Vélez
- Department of Biology, Rio Piedras Campus, University of Puerto Rico, San Juan, PR 00931, USA; (A.S.R.-A.); (C.M.C.-V.)
| | - Manuel Delgado-Vélez
- Department of Biology, Rio Piedras Campus, University of Puerto Rico, San Juan, PR 00931, USA; (A.S.R.-A.); (C.M.C.-V.)
- Molecular Sciences Research Center, Clinical Bioreagent Center, University of Puerto Rico, San Juan, PR 00926, USA
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Puerto Rico, San Juan, PR 00936, USA
| |
Collapse
|
9
|
Rodríguez-Vega A, Dutra-Tavares AC, Souza TP, Semeão KA, Filgueiras CC, Ribeiro-Carvalho A, Manhães AC, Abreu-Villaça Y. Nicotine Exposure in a Phencyclidine-Induced Mice Model of Schizophrenia: Sex-Selective Medial Prefrontal Cortex Protein Markers of the Combined Insults in Adolescent Mice. Int J Mol Sci 2023; 24:14634. [PMID: 37834084 PMCID: PMC10572990 DOI: 10.3390/ijms241914634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/15/2023] Open
Abstract
Tobacco misuse as a comorbidity of schizophrenia is frequently established during adolescence. However, comorbidity markers are still missing. Here, the method of label-free proteomics was used to identify deregulated proteins in the medial prefrontal cortex (prelimbic and infralimbic) of male and female mice modelled to schizophrenia with a history of nicotine exposure during adolescence. Phencyclidine (PCP), used to model schizophrenia (SCHZ), was combined with an established model of nicotine minipump infusions (NIC). The combined insults led to worse outcomes than each insult separately when considering the absolute number of deregulated proteins and that of exclusively deregulated ones. Partially shared Reactome pathways between sexes and between PCP, NIC and PCPNIC groups indicate functional overlaps. Distinctively, proteins differentially expressed exclusively in PCPNIC mice reveal unique effects associated with the comorbidity model. Interactome maps of these proteins identified sex-selective subnetworks, within which some proteins stood out: for females, peptidyl-prolyl cis-trans isomerase (Fkbp1a) and heat shock 70 kDa protein 1B (Hspa1b), both components of the oxidative stress subnetwork, and gamma-enolase (Eno2), a component of the energy metabolism subnetwork; and for males, amphiphysin (Amph), a component of the synaptic transmission subnetwork. These are proposed to be further investigated and validated as markers of the combined insult during adolescence.
Collapse
Affiliation(s)
- Andrés Rodríguez-Vega
- Laboratório de Neurofisiologia, Departamento de Ciências Fisiológicas, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-170, RJ, Brazil; (A.R.-V.); (A.C.D.-T.); (T.P.S.); (K.A.S.); (C.C.F.); (A.C.M.)
| | - Ana Carolina Dutra-Tavares
- Laboratório de Neurofisiologia, Departamento de Ciências Fisiológicas, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-170, RJ, Brazil; (A.R.-V.); (A.C.D.-T.); (T.P.S.); (K.A.S.); (C.C.F.); (A.C.M.)
| | - Thainá P. Souza
- Laboratório de Neurofisiologia, Departamento de Ciências Fisiológicas, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-170, RJ, Brazil; (A.R.-V.); (A.C.D.-T.); (T.P.S.); (K.A.S.); (C.C.F.); (A.C.M.)
| | - Keila A. Semeão
- Laboratório de Neurofisiologia, Departamento de Ciências Fisiológicas, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-170, RJ, Brazil; (A.R.-V.); (A.C.D.-T.); (T.P.S.); (K.A.S.); (C.C.F.); (A.C.M.)
| | - Claudio C. Filgueiras
- Laboratório de Neurofisiologia, Departamento de Ciências Fisiológicas, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-170, RJ, Brazil; (A.R.-V.); (A.C.D.-T.); (T.P.S.); (K.A.S.); (C.C.F.); (A.C.M.)
| | - Anderson Ribeiro-Carvalho
- Departamento de Ciências, Faculdade de Formação de Professores da Universidade do Estado do Rio de Janeiro, São Gonçalo 24435-005, RJ, Brazil;
| | - Alex C. Manhães
- Laboratório de Neurofisiologia, Departamento de Ciências Fisiológicas, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-170, RJ, Brazil; (A.R.-V.); (A.C.D.-T.); (T.P.S.); (K.A.S.); (C.C.F.); (A.C.M.)
| | - Yael Abreu-Villaça
- Laboratório de Neurofisiologia, Departamento de Ciências Fisiológicas, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro 20550-170, RJ, Brazil; (A.R.-V.); (A.C.D.-T.); (T.P.S.); (K.A.S.); (C.C.F.); (A.C.M.)
| |
Collapse
|
10
|
Nimgampalle M, Chakravarthy H, Sharma S, Shree S, Bhat AR, Pradeepkiran JA, Devanathan V. Neurotransmitter systems in the etiology of major neurological disorders: Emerging insights and therapeutic implications. Ageing Res Rev 2023; 89:101994. [PMID: 37385351 DOI: 10.1016/j.arr.2023.101994] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 06/21/2023] [Accepted: 06/25/2023] [Indexed: 07/01/2023]
Abstract
Neurotransmitters serve as chemical messengers playing a crucial role in information processing throughout the nervous system, and are essential for healthy physiological and behavioural functions in the body. Neurotransmitter systems are classified as cholinergic, glutamatergic, GABAergic, dopaminergic, serotonergic, histaminergic, or aminergic systems, depending on the type of neurotransmitter secreted by the neuron, allowing effector organs to carry out specific functions by sending nerve impulses. Dysregulation of a neurotransmitter system is typically linked to a specific neurological disorder. However, more recent research points to a distinct pathogenic role for each neurotransmitter system in more than one neurological disorder of the central nervous system. In this context, the review provides recently updated information on each neurotransmitter system, including the pathways involved in their biochemical synthesis and regulation, their physiological functions, pathogenic roles in diseases, current diagnostics, new therapeutic targets, and the currently used drugs for associated neurological disorders. Finally, a brief overview of the recent developments in neurotransmitter-based therapeutics for selected neurological disorders is offered, followed by future perspectives in that area of research.
Collapse
Affiliation(s)
- Mallikarjuna Nimgampalle
- Department of Biology, Indian Institute of Science Education and Research Tirupati (IISER T), Transit campus, Karakambadi Road, Mangalam, Tirupati 517507, Andhra Pradesh, India
| | - Harshini Chakravarthy
- Department of Biology, Indian Institute of Science Education and Research Tirupati (IISER T), Transit campus, Karakambadi Road, Mangalam, Tirupati 517507, Andhra Pradesh, India.
| | - Sapana Sharma
- Department of Biology, Indian Institute of Science Education and Research Tirupati (IISER T), Transit campus, Karakambadi Road, Mangalam, Tirupati 517507, Andhra Pradesh, India
| | - Shruti Shree
- Department of Biology, Indian Institute of Science Education and Research Tirupati (IISER T), Transit campus, Karakambadi Road, Mangalam, Tirupati 517507, Andhra Pradesh, India
| | - Anoop Ramachandra Bhat
- Department of Biology, Indian Institute of Science Education and Research Tirupati (IISER T), Transit campus, Karakambadi Road, Mangalam, Tirupati 517507, Andhra Pradesh, India
| | | | - Vasudharani Devanathan
- Department of Biology, Indian Institute of Science Education and Research Tirupati (IISER T), Transit campus, Karakambadi Road, Mangalam, Tirupati 517507, Andhra Pradesh, India.
| |
Collapse
|
11
|
Mashimo M, Fujii T, Ono S, Moriwaki Y, Misawa H, Azami T, Kasahara T, Kawashima K. GTS-21 Enhances Regulatory T Cell Development from T Cell Receptor-Activated Human CD4 + T Cells Exhibiting Varied Levels of CHRNA7 and CHRFAM7A Expression. Int J Mol Sci 2023; 24:12257. [PMID: 37569633 PMCID: PMC10418795 DOI: 10.3390/ijms241512257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/22/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
Immune cells such as T cells and macrophages express α7 nicotinic acetylcholine receptors (α7 nAChRs), which contribute to the regulation of immune and inflammatory responses. Earlier findings suggest α7 nAChR activation promotes the development of regulatory T cells (Tregs) in mice. Using human CD4+ T cells, we investigated the mRNA expression of the α7 subunit and the human-specific dupα7 nAChR subunit, which functions as a dominant-negative regulator of ion channel function, under resting conditions and T cell receptor (TCR)-activation. We then explored the effects of the selective α7 nAChR agonist GTS-21 on proliferation of TCR-activated T cells and Treg development. Varied levels of mRNA for both the α7 and dupα7 nAChR subunits were detected in resting human CD4+ T cells. mRNA expression of the α7 nAChR subunit was profoundly suppressed on days 4 and 7 of TCR-activation as compared to day 1, whereas mRNA expression of the dupα7 nAChR subunit remained nearly constant. GTS-21 did not alter CD4+ T cell proliferation but significantly promoted Treg development. These results suggest the potential ex vivo utility of GTS-21 for preparing Tregs for adoptive immunotherapy, even with high expression of the dupα7 subunit.
Collapse
Affiliation(s)
- Masato Mashimo
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Doshisha Women’s College of Liberal Arts, Kyotanabe 610-0395, Japan; (M.M.); (T.F.)
| | - Takeshi Fujii
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Doshisha Women’s College of Liberal Arts, Kyotanabe 610-0395, Japan; (M.M.); (T.F.)
| | - Shiro Ono
- Laboratory of Immunology, Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi 584-8540, Japan;
| | - Yasuhiro Moriwaki
- Department of Pharmacology, Faculty of Pharmacy, Keio University, Minato-ku, Tokyo 105-8512, Japan; (Y.M.); (H.M.)
| | - Hidemi Misawa
- Department of Pharmacology, Faculty of Pharmacy, Keio University, Minato-ku, Tokyo 105-8512, Japan; (Y.M.); (H.M.)
| | - Tetsushi Azami
- Division of Gastroenterology, Department of Internal Medicine, Showa University Fujigaoka Hospital, Yokohama 227-8502, Japan;
| | - Tadashi Kasahara
- Division of Inflammation Research, Jichi Medical University, Shimotsukeshi 324-0498, Japan;
| | - Koichiro Kawashima
- Department of Molecular Pharmacology, Kitasato University School of Pharmaceutical Sciences, Minato-ku, Tokyo 108-8641, Japan
| |
Collapse
|
12
|
Oz M, King JR, Yang KHS, Khushaish S, Tchugunova Y, Khajah MA, Luqmani YA, Kabbani N. α7 nicotinic acetylcholine receptor interaction with G proteins in breast cancer cell proliferation, motility, and calcium signaling. PLoS One 2023; 18:e0289098. [PMID: 37490473 PMCID: PMC10368273 DOI: 10.1371/journal.pone.0289098] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/11/2023] [Indexed: 07/27/2023] Open
Abstract
Chronic smoking is a primary risk factor for breast cancer due to the presence of various toxins and carcinogens within tobacco products. Nicotine is the primary addictive component of tobacco products and has been shown to promote breast cancer cell proliferation and metastases. Nicotine activates nicotinic acetylcholine receptors (nAChRs) that are expressed in cancer cell lines. Here, we examine the role of the α7 nAChR in coupling to heterotrimeric G proteins within breast cancer MCF-7 cells. Pharmacological activation of the α7 nAChR using choline or nicotine was found to increase proliferation, motility, and calcium signaling in MCF-7 cells. This effect of α7 nAChR on cell proliferation was abolished by application of Gαi/o and Gαq protein blockers. Specifically, application of the Gαi/o inhibitor pertussis toxin was found to abolish choline-mediated cell proliferation and intracellular calcium transient response. These findings were corroborated by expression of a G protein binding dominant negative nAChR subunit (α7345-348A), which resulted in significantly attenuating calcium signaling and cellular proliferation in response to choline. Our study shows a new role for G protein signaling in the mechanism of α7 nAChR-associated breast cancer growth.
Collapse
Affiliation(s)
- Murat Oz
- Department of Pharmacology and Therapeutics, College of Pharmacy, Kuwait University, Safat, Kuwait
| | - Justin R King
- Interdisciplinary Program in Neuroscience, George Mason University, Fairfax, Virginia, United States of America
| | - Keun-Hang Susan Yang
- Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, Orange, California, United States of America
| | - Sarah Khushaish
- Department of Pharmacology and Therapeutics, College of Pharmacy, Kuwait University, Safat, Kuwait
| | - Yulia Tchugunova
- Department of Pharmacology and Therapeutics, College of Pharmacy, Kuwait University, Safat, Kuwait
| | - Maitham A Khajah
- Department of Pharmacology and Therapeutics, College of Pharmacy, Kuwait University, Safat, Kuwait
| | - Yunus A Luqmani
- Department of Pharmacology and Therapeutics, College of Pharmacy, Kuwait University, Safat, Kuwait
| | - Nadine Kabbani
- Interdisciplinary Program in Neuroscience, George Mason University, Fairfax, Virginia, United States of America
- School of Systems Biology George Mason University, Fairfax, Virginia, United States of America
| |
Collapse
|
13
|
Graur A, Sinclair P, Schneeweis AK, Pak DT, Kabbani N. The human acetylcholinesterase C-terminal T30 peptide activates neuronal growth through alpha 7 nicotinic acetylcholine receptors and the mTOR pathway. Sci Rep 2023; 13:11434. [PMID: 37454238 PMCID: PMC10349870 DOI: 10.1038/s41598-023-38637-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023] Open
Abstract
Acetylcholinesterase (AChE) is a highly conserved enzyme responsible for the regulation of acetylcholine signaling within the brain and periphery. AChE has also been shown to participate in non-enzymatic activity and contribute to cellular development and aging. In particular, enzymatic cleavage of the synaptic AChE isoform, AChE-T, is shown to generate a bioactive T30 peptide that binds to the ⍺7 nicotinic acetylcholine receptor (nAChR) at synapses. Here, we explore intracellular mechanisms of T30 signaling within the human cholinergic neural cell line SH-SY5Y using high performance liquid chromatography (HPLC) coupled to electrospray ionization mass spectrometry (ESI-MS/MS). Proteomic analysis of cells exposed to (100 nM) T30 for 3-days reveals significant changes within proteins important for cell growth. Specifically, bioinformatic analysis identifies proteins that converge onto the mammalian target of rapamycin (mTOR) pathway signaling. Functional experiments confirm that T30 regulates neural cell growth via mTOR signaling and ⍺7 nAChR activation. T30 was found promote mTORC1 pro-growth signaling through an increase in phosphorylated elF4E and S6K1, and a decrease in the autophagy LC3B-II protein. These findings are corroborated in hippocampal neurons and show that T30 promotes dendritic arborization. Taken together, our findings define mTOR as a novel pathway activated by T30 interaction with the nAChR and suggest a role for this process in human disease.
Collapse
Affiliation(s)
- Alexandru Graur
- School of Systems Biology, George Mason University, 4400 University Drive, Fairfax, VA, 22030, USA
| | - Patricia Sinclair
- Interdiscplinary Program in Neuroscience, George Mason University, Fairfax, VA, 22030, USA
| | - Amanda K Schneeweis
- Department of Pharmacology and Physiology, Georgetown University Medical Center, Washington, DC, USA
| | - Daniel T Pak
- Department of Pharmacology and Physiology, Georgetown University Medical Center, Washington, DC, USA
| | - Nadine Kabbani
- School of Systems Biology, George Mason University, 4400 University Drive, Fairfax, VA, 22030, USA.
| |
Collapse
|
14
|
Ivanov IA, Siniavin AE, Palikov VA, Senko DA, Shelukhina IV, Epifanova LA, Ojomoko LO, Belukhina SY, Prokopev NA, Landau MA, Palikova YA, Kazakov VA, Borozdina NA, Bervinova AV, Dyachenko IA, Kasheverov IE, Tsetlin VI, Kudryavtsev DS. Analogs of 6-Bromohypaphorine with Increased Agonist Potency for α7 Nicotinic Receptor as Anti-Inflammatory Analgesic Agents. Mar Drugs 2023; 21:368. [PMID: 37367693 DOI: 10.3390/md21060368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/03/2023] [Accepted: 06/14/2023] [Indexed: 06/28/2023] Open
Abstract
Hypaphorines, tryptophan derivatives, have anti-inflammatory activity, but their mechanism of action was largely unknown. Marine alkaloid L-6-bromohypaphorine with EC50 of 80 μM acts as an agonist of α7 nicotinic acetylcholine receptor (nAChR) involved in anti-inflammatory regulation. We designed the 6-substituted hypaphorine analogs with increased potency using virtual screening of their binding to the α7 nAChR molecular model. Fourteen designed analogs were synthesized and tested in vitro by calcium fluorescence assay on the α7 nAChR expressed in neuro 2a cells, methoxy ester of D-6-iodohypaphorine (6ID) showing the highest potency (EC50 610 nM), being almost inactive toward α9α10 nAChR. The macrophages cytometry revealed an anti-inflammatory activity, decreasing the expression of TLR4 and increasing CD86, similarly to the action of PNU282987, a selective α7 nAChR agonist. 6ID administration in doses 0.1 and 0.5 mg/kg decreased carrageenan-induced allodynia and hyperalgesia in rodents, in accord with its anti-inflammatory action. Methoxy ester of D-6-nitrohypaphorine demonstrated anti-oedemic and analgesic effects in arthritis rat model at i.p. doses 0.05-0.26 mg/kg. Tested compounds showed excellent tolerability with no acute in vivo toxicity in dosages up to 100 mg/kg i.p. Thus, combining molecular modelling and natural product-inspired drug design improved the desired activity of the chosen nAChR ligand.
Collapse
Affiliation(s)
- Igor A Ivanov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Andrei E Siniavin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
- N.F. Gamaleya National Research Center for Epidemiology and Microbiology, Ivanovsky Institute of Virology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia
| | - Victor A Palikov
- The Branch of the Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia
| | - Dmitry A Senko
- Center Neurobiology and Brain Restoration, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia
| | - Irina V Shelukhina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Lyubov A Epifanova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Lucy O Ojomoko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Svetlana Y Belukhina
- Center of Life Sciences, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia
| | - Nikita A Prokopev
- Department of Biology, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Mariia A Landau
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Yulia A Palikova
- The Branch of the Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia
| | - Vitaly A Kazakov
- The Branch of the Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia
| | - Natalia A Borozdina
- The Branch of the Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia
| | - Arina V Bervinova
- The Branch of the Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia
| | - Igor A Dyachenko
- The Branch of the Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia
| | - Igor E Kasheverov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Victor I Tsetlin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Denis S Kudryavtsev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| |
Collapse
|
15
|
Botticelli E, Guerriero C, Fucile S, De Stefano ME, Matera C, Dallanoce C, De Amici M, Tata AM. α7 Nicotinic Acetylcholine Receptors May Improve Schwann Cell Regenerating Potential via Metabotropic Signaling Pathways. Cells 2023; 12:1494. [PMID: 37296615 PMCID: PMC10253098 DOI: 10.3390/cells12111494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 05/15/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023] Open
Abstract
BACKGROUND Schwann cells (SCs) are glial cells involved in peripheral axon myelination. SCs also play a strategic role after peripheral nerve injury, regulating local inflammation and axon regeneration. Our previous studies demonstrated the presence of cholinergic receptors in SCs. In particular, the α7 nicotinic acetylcholine receptors (nAChRs) are expressed in SCs after peripheral axotomy, suggesting their involvement in the regulation of SC-regenerating properties. To clarify the role that α7 nAChRs may play after peripheral axon damage, in this study we investigated the signal transduction pathways triggered by receptor activation and the effects produced by their activation. METHODS Both ionotropic and metabotropic cholinergic signaling were analyzed by calcium imaging and Western blot analysis, respectively, following α7 nAChR activation. In addition, the expression of c-Jun and α7 nAChRs was evaluated by immunocytochemistry and Western blot analysis. Finally, the cell migration was studied by a wound healing assay. RESULTS Activation of α7 nAChRs, activated by the selective partial agonist ICH3, did not induce calcium mobilization but positively modulated the PI3K/AKT/mTORC1 axis. Activation of the mTORC1 complex was also supported by the up-regulated expression of its specific p-p70 S6KThr389 target. Moreover, up-regulation of p-AMPKThr172, a negative regulator of myelination, was also observed concomitantly to an increased nuclear accumulation of the transcription factor c-Jun. Cell migration and morphology analyses proved that α7 nAChR activation also promotes SC migration. CONCLUSIONS Our data demonstrate that α7 nAChRs, expressed by SCs only after peripheral axon damage and/or in an inflammatory microenvironment, contribute to improve the SCs regenerating properties. Indeed, α7 nAChR stimulation leads to an upregulation of c-Jun expression and promotes Schwann cell migration by non-canonical pathways involving the mTORC1 activity.
Collapse
Affiliation(s)
- Elisabetta Botticelli
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Rome, Italy; (E.B.); (C.G.); (M.E.D.S.)
| | - Claudia Guerriero
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Rome, Italy; (E.B.); (C.G.); (M.E.D.S.)
| | - Sergio Fucile
- IRCCS Neuromed, 86077 Pozzilli, Italy;
- Department of Physiology and Pharmacology “V. Erspamer”, Sapienza University of Rome, 00185 Rome, Italy
| | - Maria Egle De Stefano
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Rome, Italy; (E.B.); (C.G.); (M.E.D.S.)
- Research Centre of Neurobiology “Daniel Bovet”, Sapienza University of Rome, 00185 Rome, Italy
| | - Carlo Matera
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy; (C.M.); (C.D.)
| | - Clelia Dallanoce
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy; (C.M.); (C.D.)
| | - Marco De Amici
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy; (C.M.); (C.D.)
| | - Ada Maria Tata
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Rome, Italy; (E.B.); (C.G.); (M.E.D.S.)
- Research Centre of Neurobiology “Daniel Bovet”, Sapienza University of Rome, 00185 Rome, Italy
| |
Collapse
|
16
|
Barrantes FJ. Structure and function meet at the nicotinic acetylcholine receptor-lipid interface. Pharmacol Res 2023; 190:106729. [PMID: 36931540 DOI: 10.1016/j.phrs.2023.106729] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/08/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023]
Abstract
The nicotinic acetylcholine receptor (nAChR) is a transmembrane protein that mediates fast intercellular communication in response to the endogenous neurotransmitter acetylcholine. It is the best characterized and archetypal molecule in the superfamily of pentameric ligand-gated ion channels (pLGICs). As a typical transmembrane macromolecule, it interacts extensively with its vicinal lipid microenvironment. Experimental evidence provides a wealth of information on receptor-lipid crosstalk: the nAChR exerts influence on its immediate membrane environment and conversely, the lipid moiety modulates ligand binding, affinity state transitions and gating of ion translocation functions of the receptor protein. Recent cryogenic electron microscopy (cryo-EM) studies have unveiled the occurrence of sites for phospholipids and cholesterol on the lipid-exposed regions of neuronal and electroplax nAChRs, confirming early spectroscopic and affinity labeling studies demonstrating the close contact of lipid molecules with the receptor transmembrane segments. This new data provides structural support to the postulated "lipid sensor" ability displayed by the outer ring of M4 transmembrane domains and their modulatory role on nAChR function, as we postulated a decade ago. Borrowing from the best characterized nAChR, the electroplax (muscle-type) receptor, and exploiting new structural information on the neuronal nAChR, it is now possible to achieve an improved depiction of these sites. In combination with site-directed mutagenesis, single-channel electrophysiology, and molecular dynamics studies, the new structural information delivers a more comprehensive portrayal of these lipid-sensitive loci, providing mechanistic explanations for their ability to modulate nAChR properties and raising the possibility of targetting them in disease.
Collapse
Affiliation(s)
- Francisco J Barrantes
- Laboratory of Molecular Neurobiology, Biomedical Research Institute, Faculty of Medical Sciences, Pontifical Catholic University of Argentina (UCA) - Argentine Scientific & Technol. Research Council (CONICET), Av. Alicia Moreau de Justo 1600, C1107AAZ Buenos Aires, Argentina.
| |
Collapse
|
17
|
CHRNA1 and its correlated-myogenesis/cell cycle genes are prognosis-related markers of metastatic melanoma. Biochem Biophys Rep 2023; 33:101425. [PMID: 36654921 PMCID: PMC9841360 DOI: 10.1016/j.bbrep.2023.101425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 01/04/2023] [Accepted: 01/05/2023] [Indexed: 01/11/2023] Open
Abstract
Nicotinic acetylcholine receptors (CHRNs) expression and their critical role in various types of cancer have been reported. However, it is still unclear which CHRNs and their associated genes play essential roles in metastasis in melanoma patients. Here, we performed bioinformatics analyses on publicly available bulk RNA sequencing (RNA-seq) data of patients with melanoma to identify the CHRNs highly expressed in metastatic melanoma. We found that CHRNA1 was highly expressed in metastatic melanoma samples compared to primary melanoma samples and was strongly associated with CHRNB1 and CHRNG. These muscle-type CHRNs (CHRNA1, CHRNB1, and CHRNG) were correlated with the ZEB1 and Rho/ROCK pathway-related genes in metastatic melanoma samples. Pairwise correlations and enrichment analyses revealed that CHRNA1 was significantly associated with myogenesis/muscle contraction and cell cycle genes. Kaplan-Meier curves illustrated the involvement of CHRNA1, four of its correlated genes (DES, FLNC, CDK1, and CDC20), and the myogenesis gene signature in the prognosis of melanoma patients. Following the bulk RNA-seq analysis, single-cell RNA-seq (scRNA-seq) analysis showed that the CHRNA1-expressing melanoma cells are primarily metastatic and had high expression levels of CHRNB1, CHRNG, and myogenesis/cell cycle-related genes. Our bioinformatics analyses of the bulk RNA-seq and scRNA-seq data of patients with melanoma revealed that CHRNA1 and its correlated myogenesis/cell-related cycle genes are critical prognosis-related markers of metastatic melanoma.
Collapse
|
18
|
Sinclair P, Kabbani N. Nicotinic receptor components of amyloid beta 42 proteome regulation in human neural cells. PLoS One 2022; 17:e0270479. [PMID: 35960729 PMCID: PMC9374227 DOI: 10.1371/journal.pone.0270479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 06/12/2022] [Indexed: 11/30/2022] Open
Abstract
Alzheimer’s disease (AD) is associated with chronic neurodegeneration often accompanied by elevated levels of the neurotoxic peptide amyloid-beta 1–42 (Aβ42) in the brain. Studies show that extracellular Aβ42 binds to various cell surface receptors including the human α7 nicotinic acetylcholine receptor (nAChR) and activates pathways of neurotoxicity leading to cell death. The α7 nAChR is thus considered a promising drug target for therapy against neurodegenerative disease such as AD. In this study, we use mass spectrometry-based label-free precursor ion quantification to identify proteins and pathways that are changed by a 72-hour treatment with Aβ42 or Aβ42 in the presence of the α7 nAChR blocker, α-bungarotoxin (Bgtx) in the human neuroblastoma SH-SY5Y cell line. Bioinformatic gene ontology enrichment analysis was used to identify and characterize proteins and pathways altered by Aβ42 presentation. The results support evidence on the involvement of mitochondrial proteins in Aβ42 responses and define potential mechanisms of α7 nAChR mediated amyloid toxicity. These findings can inform pharmacological strategies for drug design and treatment against amyloid disease.
Collapse
Affiliation(s)
- Patricia Sinclair
- Interdisciplinary Program in Neuroscience, George Mason University, Fairfax, VA, United States of America
| | - Nadine Kabbani
- Interdisciplinary Program in Neuroscience, George Mason University, Fairfax, VA, United States of America
- School of System Biology, George Mason University, Fairfax, VA, United States of America
- * E-mail:
| |
Collapse
|
19
|
Mashimo M, Kawashima K, Fujii T. Non-neuronal Cholinergic Muscarinic Acetylcholine Receptors in the Regulation of Immune Function. Biol Pharm Bull 2022; 45:675-683. [PMID: 35650095 DOI: 10.1248/bpb.b21-01005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Immune cells such as T and B cells, monocytes and macrophages all express most of the cholinergic components of the nervous system, including acetylcholine (ACh), choline acetyltransferase (ChAT), high affinity choline transporter, muscarinic and nicotinic ACh receptors (mAChRs and nAChRs, respectively), and acetylcholinesterase (AChE). Because of its efficient cleavage by AChE, ACh synthesized and released from immune cells acts only locally in an autocrine and/or paracrine fashion at mAChRs and nAChRs on themselves and other immune cells located in close proximity, leading to modification of immune function. Immune cells generally express all five mAChR subtypes (M1-M5) and neuron type nAChR subunits α2-α7, α9, α10, β2-β4. The expression pattern and levels of mAChR subtypes and nAChR subunits vary depending on the tissue involved and its immunological status. Immunological activation of T cells via T-cell receptor-mediated pathways and cell adhesion molecules upregulates ChAT expression, which facilitates the synthesis and release of ACh. At present, α7 nAChRs expressed in macrophages are receiving much attention because they play a central role in anti-inflammatory cholinergic pathways. However, it now appears that through modification of cytokine synthesis, Gq/11-coupled mAChRs play a prominent role in regulation of T cell proliferation and differentiation and B cell immunoglobulin class switching. It is anticipated that greater understanding of Gq/11-coupled mAChRs on immune cells will provide an opportunity to develop new and effective treatments for immunological disorders.
Collapse
Affiliation(s)
- Masato Mashimo
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts
| | - Koichiro Kawashima
- Department of Molecular Pharmacology, Kitasato University School of Pharmaceutical Sciences
| | - Takeshi Fujii
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts
| |
Collapse
|
20
|
Pucci S, Zoli M, Clementi F, Gotti C. α9-Containing Nicotinic Receptors in Cancer. Front Cell Neurosci 2022; 15:805123. [PMID: 35126059 PMCID: PMC8814915 DOI: 10.3389/fncel.2021.805123] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 12/29/2021] [Indexed: 12/21/2022] Open
Abstract
Neuronal nicotinic acetylcholine receptors containing the α9 or the α9 and α10 subunits are expressed in various extra-neuronal tissues. Moreover, most cancer cells and tissues highly express α9-containing receptors, and a number of studies have shown that they are powerful regulators of responses that stimulate cancer processes such as proliferation, inhibition of apoptosis, and metastasis. It has also emerged that their modulation is a promising target for drug development. The aim of this review is to summarize recent data showing the involvement of these receptors in controlling the downstream signaling cascades involved in the promotion of cancer.
Collapse
Affiliation(s)
- Susanna Pucci
- Institute of Neuroscience, National Research Council (CNR), Milan, Italy
- NeuroMi Milan Center for Neuroscience, University of Milano Bicocca, Milan, Italy
| | - Michele Zoli
- Department of Biomedical, Metabolic and Neural Sciences, Center for Neuroscience and Neurotechnology (CfNN), University of Modena and Reggio Emilia, Modena, Italy
| | - Francesco Clementi
- Institute of Neuroscience, National Research Council (CNR), Milan, Italy
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Milan, Italy
| | - Cecilia Gotti
- Institute of Neuroscience, National Research Council (CNR), Milan, Italy
- NeuroMi Milan Center for Neuroscience, University of Milano Bicocca, Milan, Italy
- *Correspondence: Cecilia Gotti
| |
Collapse
|
21
|
Hollenhorst MI, Krasteva-Christ G. Nicotinic Acetylcholine Receptors in the Respiratory Tract. Molecules 2021; 26:6097. [PMID: 34684676 PMCID: PMC8539672 DOI: 10.3390/molecules26206097] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/01/2021] [Accepted: 10/06/2021] [Indexed: 02/07/2023] Open
Abstract
Nicotinic acetylcholine receptors (nAChR) are widely distributed in neuronal and non-neuronal tissues, where they play diverse physiological roles. In this review, we highlight the recent findings regarding the role of nAChR in the respiratory tract with a special focus on the involvement of nAChR in the regulation of multiple processes in health and disease. We discuss the role of nAChR in mucociliary clearance, inflammation, and infection and in airway diseases such as asthma, chronic obstructive pulmonary disease, and cancer. The subtype diversity of nAChR enables differential regulation, making them a suitable pharmaceutical target in many diseases. The stimulation of the α3β4 nAChR could be beneficial in diseases accompanied by impaired mucociliary clearance, and the anti-inflammatory effect due to an α7 nAChR stimulation could alleviate symptoms in diseases with chronic inflammation such as chronic obstructive pulmonary disease and asthma, while the inhibition of the α5 nAChR could potentially be applied in non-small cell lung cancer treatment. However, while clinical studies targeting nAChR in the airways are still lacking, we suggest that more detailed research into this topic and possible pharmaceutical applications could represent a valuable tool to alleviate the symptoms of diverse airway diseases.
Collapse
|
22
|
Borroni V, Barrantes FJ. Homomeric and Heteromeric α7 Nicotinic Acetylcholine Receptors in Health and Some Central Nervous System Diseases. MEMBRANES 2021; 11:membranes11090664. [PMID: 34564481 PMCID: PMC8465519 DOI: 10.3390/membranes11090664] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/24/2021] [Accepted: 08/24/2021] [Indexed: 11/22/2022]
Abstract
Nicotinic acetylcholine receptors (nAChRs) are pentameric ligand-gated ion channels involved in the modulation of essential brain functions such as memory, learning, and attention. Homomeric α7 nAChR, formed exclusively by five identical α7 subunits, is involved in rapid synaptic transmission, whereas the heteromeric oligomers composed of α7 in combination with β subunits display metabotropic properties and operate in slower time frames. At the cellular level, the activation of nAChRs allows the entry of Na+ and Ca2+; the two cations depolarize the membrane and trigger diverse cellular signals, depending on the type of nAChR pentamer and neurons involved, the location of the intervening cells, and the networks of which these neuronal cells form part. These features make the α7 nAChR a central player in neurotransmission, metabolically associated Ca2+-mediated signaling, and modulation of diverse fundamental processes operated by other neurotransmitters in the brain. Due to its ubiquitous distribution and the multiple functions it displays in the brain, the α7 nAChR is associated with a variety of neurological and neuropsychiatric disorders whose exact etiopathogenic mechanisms are still elusive.
Collapse
Affiliation(s)
- Virginia Borroni
- Instituto de Tecnología en Polímeros y Nanotecnología (ITPN-UBA-CONICET), Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires C1127AAR, Argentina;
| | - Francisco J. Barrantes
- Laboratory of Molecular Neurobiology, Institute for Biomedical Research, UCA–CONICET, Faculty of Medical Sciences, Catholic University of Argentina, Av. Alicia Moreau de Justo 1600, Buenos Aires C1107AAZ, Argentina
- Correspondence:
| |
Collapse
|
23
|
Zhao X, Wilson K, Uteshev V, He JJ. Activation of α7 nicotinic acetylcholine receptor ameliorates HIV-associated neurology and neuropathology. Brain 2021; 144:3355-3370. [PMID: 34196664 PMCID: PMC8677536 DOI: 10.1093/brain/awab251] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 03/28/2021] [Accepted: 06/03/2021] [Indexed: 11/16/2022] Open
Abstract
HIV-associated neurocognitive disorders (HAND) in the era of combination antiretroviral therapy are primarily manifested as impaired behaviours, glial activation/neuroinflammation and compromised neuronal integrity, for which there are no effective treatments currently available. In the current study, we used doxycycline-inducible astrocyte-specific HIV Tat transgenic mice (iTat), a surrogate HAND model, and determined effects of PNU-125096, a positive allosteric modulator of α7 nicotinic acetylcholine receptor (α7 nAChR) on Tat-induced behavioural impairments and neuropathologies. We showed that PNU-125096 treatment significantly improved locomotor, learning and memory deficits of iTat mice while inhibited glial activation and increased PSD-95 expression in the cortex and hippocampus of iTat mice. Using α7 nAChR knockout mice, we showed that α7 nAChR knockout eliminated the protective effects of PNU-125096 on iTat mice. In addition, we showed that inhibition of p38 phosphorylation by SB239063, a p38 MAPK-specific inhibitor exacerbated Tat neurotoxicity in iTat mice. Last, we used primary mouse cortical individual cultures and neuron-astrocytes co-cultures and in vivo staining of iTat mouse brain tissues and showed that glial activation was directly involved in the interplay among Tat neurotoxicity, α7 nAChR activation and the p38 MAPK signalling pathway. Taken together, these findings demonstrated for the first time that α7 nAChR activation led to protection against HAND and suggested that α7 nAChR modulator PNU-125096 holds significant promise for development of therapeutics for HAND.
Collapse
Affiliation(s)
- Xiaojie Zhao
- Department of Microbiology and Immunology, Rosalind Franklin University, Chicago Medical School, North Chicago, IL 60064, USA.,Center for Cancer Cell Biology, Immunology and Infection, Rosalind Franklin University, North Chicago, IL 60064, USA
| | - Kelly Wilson
- Department of Microbiology and Immunology, Rosalind Franklin University, Chicago Medical School, North Chicago, IL 60064, USA.,Center for Cancer Cell Biology, Immunology and Infection, Rosalind Franklin University, North Chicago, IL 60064, USA
| | - Victor Uteshev
- Department of Pharmacology and Neuroscience, Graduate School of Biomedical Sciences of University of North Texas Health Science Center, Fort Worth, TX 76107, USA
| | - Johnny J He
- Department of Microbiology and Immunology, Rosalind Franklin University, Chicago Medical School, North Chicago, IL 60064, USA.,Center for Cancer Cell Biology, Immunology and Infection, Rosalind Franklin University, North Chicago, IL 60064, USA.,School of Graduate and Postdoctoral Studies, Rosalind Franklin University, North Chicago, IL 60064, USA
| |
Collapse
|
24
|
Piovesana R, Salazar Intriago MS, Dini L, Tata AM. Cholinergic Modulation of Neuroinflammation: Focus on α7 Nicotinic Receptor. Int J Mol Sci 2021; 22:ijms22094912. [PMID: 34066354 PMCID: PMC8125157 DOI: 10.3390/ijms22094912] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/29/2021] [Accepted: 05/04/2021] [Indexed: 12/15/2022] Open
Abstract
All nervous system pathologies (e.g., neurodegenerative/demyelinating diseases and brain tumours) develop neuroinflammation, a beneficial process during pathological events, aimed at removing damaged cells, toxic agents, and/or pathogens. Unfortunately, excessive inflammation frequently occurs during nervous system disorders, becoming a detrimental event capable of enhancing neurons and myelinating glial cell impairment, rather than improving their survival and activity. Consequently, targeting the neuroinflammation could be relevant for reducing brain injury and rescuing neuronal and glial cell functions. Several studies have highlighted the role of acetylcholine and its receptors in the regulation of central and peripheral inflammation. In particular, α7 nicotinic receptor has been described as one of the main regulators of the “brain cholinergic anti-inflammatory pathway”. Its expression in astrocytes and microglial cells and the ability to modulate anti-inflammatory cytokines make this receptor a new interesting therapeutic target for neuroinflammation regulation. In this review, we summarize the distribution and physiological functions of the α7 nicotinic receptor in glial cells (astrocytes and microglia) and its role in the modulation of neuroinflammation. Moreover, we explore how its altered expression and function contribute to the development of different neurological pathologies and exacerbate neuroinflammatory processes.
Collapse
Affiliation(s)
- Roberta Piovesana
- Département de Neurosciences, Université de Montréal, Montréal, QC H3C 3J7, Canada;
- Groupe de Recherche sur le Système Nerveux Central, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | | | - Luciana Dini
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza, University of Rome, 00185 Rome, Italy; (M.S.S.I.); (L.D.)
| | - Ada Maria Tata
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza, University of Rome, 00185 Rome, Italy; (M.S.S.I.); (L.D.)
- Research Centre of Neurobiology “Daniel Bovet”, Sapienza, University of Rome, 00185 Rome, Italy
- Correspondence: ; Tel.: +39-06-4991-2822
| |
Collapse
|
25
|
Potasiewicz A, Faron-Gorecka A, Popik P, Nikiforuk A. Repeated treatment with alpha 7 nicotinic acetylcholine receptor ligands enhances cognitive processes and stimulates Erk1/2 and Arc genes in rats. Behav Brain Res 2021; 409:113338. [PMID: 33940049 DOI: 10.1016/j.bbr.2021.113338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 04/02/2021] [Accepted: 04/28/2021] [Indexed: 10/21/2022]
Abstract
The α7 nicotinic acetylcholine receptor (α7 nAChR) is a potential target for the treatment of cognitive decline in patients with schizophrenia, Alzheimer's disease, and attention-deficit/hyperactivity disorder. Here we examined the promnesic activity of the α7 nAChR agonist (A582941), the type I (CCMI), and the type II (PNU120596) positive allosteric modulators (PAMs) in rats following single and repeated (once daily for seven days) treatment. To determine the neuronal mechanisms underlying the procognitive activity of the tested compounds, levels of the extracellular signal-regulated kinases (Erk1/2) and the activity-regulated cytoskeleton-associated protein (Arc) mRNAs were assessed in the frontal cortical and hippocampal brain regions. Using the novel object recognition test, we demonstrate that the lower doses of A582941 (0.1 mg/kg), CCMI (1 mg/kg), and PNU120596 (0.3 mg/kg) improved recognition memory after repeated but not single administration, suggesting a cumulative effect of repeated dosing. In contrast, the higher doses of A582941 (0.3 mg/kg), CCMI (3 mg/kg) and PNU120596 (1 mg/kg) demonstrated promnesic efficacy following both single and repeated administration. Subsequent in situ hybridization revealed that repeated treatment with A582941 and CCMI, but not PNU120596 enhanced mRNA expression of the Erk1/2 and Arc in the frontal cortex and hippocampus. Present data suggest that both the α7 nAChR agonist and PAMs exhibit procognitive effects after single and repeated administration. The increased level of the Erk1/2 and Arc genes is likely to be at least partially involved in this effect.
Collapse
Affiliation(s)
- Agnieszka Potasiewicz
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Behavioral Neuroscience and Drug Development, Krakow, Poland.
| | - Agata Faron-Gorecka
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Pharmacology, Krakow, Poland
| | - Piotr Popik
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Behavioral Neuroscience and Drug Development, Krakow, Poland
| | - Agnieszka Nikiforuk
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Behavioral Neuroscience and Drug Development, Krakow, Poland
| |
Collapse
|
26
|
Caton M, Ochoa ELM, Barrantes FJ. The role of nicotinic cholinergic neurotransmission in delusional thinking. NPJ SCHIZOPHRENIA 2020; 6:16. [PMID: 32532978 PMCID: PMC7293341 DOI: 10.1038/s41537-020-0105-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 05/15/2020] [Indexed: 02/07/2023]
Abstract
Delusions are a difficult-to-treat and intellectually fascinating aspect of many psychiatric illnesses. Although scientific progress on this complex topic has been challenging, some recent advances focus on dysfunction in neural circuits, specifically in those involving dopaminergic and glutamatergic neurotransmission. Here we review the role of cholinergic neurotransmission in delusions, with a focus on nicotinic receptors, which are known to play a part in some illnesses where these symptoms appear, including delirium, schizophrenia spectrum disorders, bipolar disorder, Parkinson, Huntington, and Alzheimer diseases. Beginning with what we know about the emergence of delusions in these illnesses, we advance a hypothesis of cholinergic disturbance in the dorsal striatum where nicotinic receptors are operative. Striosomes are proposed to play a central role in the formation of delusions. This hypothesis is consistent with our current knowledge about the mechanism of action of cholinergic drugs and with our abstract models of basic cognitive mechanisms at the molecular and circuit levels. We conclude by pointing out the need for further research both at the clinical and translational levels.
Collapse
Affiliation(s)
- Michael Caton
- The Permanente Medical Group, Kaiser Santa Rosa Department of Psychiatry, 2235 Mercury Way, Santa Rosa, CA, 95047, USA
- Heritage Oaks Hospital, 4250 Auburn Boulevard, Sacramento, CA, 95841, USA
| | - Enrique L M Ochoa
- Heritage Oaks Hospital, 4250 Auburn Boulevard, Sacramento, CA, 95841, USA
- Volunteer Clinical Faculty, Department of Psychiatry and Behavioral Sciences, University of California at Davis, 2230 Stockton Boulevard, Sacramento, CA, 95817, USA
| | - Francisco J Barrantes
- Laboratory of Molecular Neurobiology, Institute for Biomedical Research (BIOMED), Faculty of Medical Sciences, UCA-CONICET, Av. Alicia Moreau de Justo 1600, C1107AFF, Buenos Aires, Argentina.
| |
Collapse
|
27
|
Mussina K, Toktarkhanova D, Filchakova O. Nicotinic Acetylcholine Receptors of PC12 Cells. Cell Mol Neurobiol 2020; 41:17-29. [PMID: 32335772 DOI: 10.1007/s10571-020-00846-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Accepted: 04/09/2020] [Indexed: 12/18/2022]
Abstract
Nicotinic acetylcholine receptors (nAChRs) have gained much attention in the scientific community since they play a significant role in multiple physiological and pathophysiological processes. Multiple approaches to study the receptors exist, with characterization of the receptors' functionality at a single cellular level using cell culturing being one of them. Derived from an adrenal medulla tumor, PC12 cells express nicotinic receptor subunits and form functional nicotinic receptors. Thus, the cells offer a convenient environment to address questions related to the functionality of the receptors. The review summarizes the findings on nicotinic receptors' expression and functions which were conducted using PC12 cells. Specific focus is given to α3-containing receptors as well as α7 receptor. Critical evaluation of findings is provided alongside insights into what can still be learned about nAChRs, using PC12 cells.
Collapse
Affiliation(s)
- Kamilla Mussina
- Biology Department, School of Sciences and Humanities, Nazarbayev University, NurSultan, Republic of Kazakhstan
| | - Dana Toktarkhanova
- Biology Department, School of Sciences and Humanities, Nazarbayev University, NurSultan, Republic of Kazakhstan
| | - Olena Filchakova
- Biology Department, School of Sciences and Humanities, Nazarbayev University, NurSultan, Republic of Kazakhstan.
| |
Collapse
|
28
|
Pseudo-Symmetric Assembly of Protodomains as a Common Denominator in the Evolution of Polytopic Helical Membrane Proteins. J Mol Evol 2020; 88:319-344. [PMID: 32189026 PMCID: PMC7162841 DOI: 10.1007/s00239-020-09934-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 02/16/2020] [Indexed: 11/05/2022]
Abstract
The polytopic helical membrane proteome is dominated by proteins containing seven transmembrane helices (7TMHs). They cannot be grouped under a monolithic fold or superfold. However, a parallel structural analysis of folds around that magic number of seven in distinct protein superfamilies (SWEET, PnuC, TRIC, FocA, Aquaporin, GPCRs) reveals a common homology, not in their structural fold, but in their systematic pseudo-symmetric construction during their evolution. Our analysis leads to guiding principles of intragenic duplication and pseudo-symmetric assembly of ancestral transmembrane helical protodomains, consisting of 3 (or 4) helices. A parallel deconstruction and reconstruction of these domains provides a structural and mechanistic framework for their evolutionary paths. It highlights the conformational plasticity inherent to fold formation itself, the role of structural as well as functional constraints in shaping that fold, and the usefulness of protodomains as a tool to probe convergent vs divergent evolution. In the case of FocA vs. Aquaporin, this protodomain analysis sheds new light on their potential divergent evolution at the protodomain level followed by duplication and parallel evolution of the two folds. GPCR domains, whose function does not seem to require symmetry, nevertheless exhibit structural pseudo-symmetry. Their construction follows the same protodomain assembly as any other pseudo-symmetric protein suggesting their potential evolutionary origins. Interestingly, all the 6/7/8TMH pseudo-symmetric folds in this study also assemble as oligomeric forms in the membrane, emphasizing the role of symmetry in evolution, revealing self-assembly and co-evolution not only at the protodomain level but also at the domain level.
Collapse
|
29
|
Noronha-Matos JB, Oliveira L, Peixoto AR, Almeida L, Castellão-Santana LM, Ambiel CR, Alves-do Prado W, Correia-de-Sá P. Nicotinic α7 receptor-induced adenosine release from perisynaptic Schwann cells controls acetylcholine spillover from motor endplates. J Neurochem 2020; 154:263-283. [PMID: 32011735 DOI: 10.1111/jnc.14975] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 01/01/2020] [Accepted: 01/30/2020] [Indexed: 12/17/2022]
Abstract
Acetylcholine (ACh) spillover from motor endplates occurs after neuronal firing bursts being potentiated by cholinesterase inhibitors (e.g., neostigmine). Nicotinic α7 receptors (α7nAChR) on perisynaptic Schwann cells (PSCs) can control ACh spillover by unknown mechanisms. We hypothesized that adenosine might be the gliotransmitter underlying PSCs-nerve terminal communication. Rat isolated hemidiaphragm preparations were used to measure (1) the outflow of [3 H]ACh, (2) real-time transmitter exocytosis by video-microscopy with the FM4-64 fluorescent dye, and (3) skeletal muscle contractions during high-frequency (50 Hz) nerve stimulation bursts in the presence of a selective α7nAChR agonist, PNU 282987, or upon inhibition of cholinesterase activity with neostigmine. To confirm our prediction that α7nAChR-mediated effects require direct activation of PSCs, we used fluorescence video-microscopy in the real-time mode to measure PNU 282987-induced [Ca2+ ]i transients from Fluo-4 NW loaded PSCs in non-stimulated preparations. The α7nAChR agonist, PNU 282987, decreased nerve-evoked diaphragm tetanic contractions. PNU 282987-induced inhibition was mimicked by neostigmine and results from the reduction of ACh exocytosis measured as decreases in [3 H]ACh release and FM4-64 fluorescent dye unloading. Methyllycaconitine blockage of α7nAChR and the fluoroacetate gliotoxin both prevented inhibition of nerve-evoked ACh release and PSCs [Ca2+ ]i transients triggered by PNU 282987 and neostigmine. Adenosine deamination, inhibition of the ENT1 nucleoside outflow, and blockage of A1 receptors prevented PNU 282987-induced inhibition of transmitter release. Data suggest that α7nAChR controls tetanic-induced ACh spillover from the neuromuscular synapse by promoting adenosine outflow from PSCs via ENT1 transporters and retrograde activation of presynaptic A1 inhibitory receptors.
Collapse
Affiliation(s)
- José B Noronha-Matos
- Laboratório de Farmacologia e Neurobiologia, Centro de Investigação Farmacológica e Inovação Medicamentosa (MedInUP), ICBAS, Universidade do Porto, Porto, Portugal
| | - Laura Oliveira
- Laboratório de Farmacologia e Neurobiologia, Centro de Investigação Farmacológica e Inovação Medicamentosa (MedInUP), ICBAS, Universidade do Porto, Porto, Portugal
| | - Ana R Peixoto
- Laboratório de Farmacologia e Neurobiologia, Centro de Investigação Farmacológica e Inovação Medicamentosa (MedInUP), ICBAS, Universidade do Porto, Porto, Portugal
| | - Liliana Almeida
- Laboratório de Farmacologia e Neurobiologia, Centro de Investigação Farmacológica e Inovação Medicamentosa (MedInUP), ICBAS, Universidade do Porto, Porto, Portugal
| | | | - Célia R Ambiel
- Departamento de Ciências Fisiológicas, Universidade Estadual de Maringá, Paraná, Brazil
| | - Wilson Alves-do Prado
- Departamento de Farmacologia e Terapêutica, Universidade Estadual de Maringá, Paraná, Brazil
| | - Paulo Correia-de-Sá
- Laboratório de Farmacologia e Neurobiologia, Centro de Investigação Farmacológica e Inovação Medicamentosa (MedInUP), ICBAS, Universidade do Porto, Porto, Portugal
| |
Collapse
|
30
|
α7 nAChRs expressed on antigen presenting cells are insensitive to the conventional antagonists α-bungarotoxin and methyllycaconitine. Int Immunopharmacol 2020; 81:106276. [PMID: 32044666 DOI: 10.1016/j.intimp.2020.106276] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/30/2020] [Accepted: 01/31/2020] [Indexed: 11/22/2022]
Abstract
Expression of α7 nicotinic acetylcholine receptors (nAChRs) on antigen presenting cells (APCs), such as macrophages and dendritic cells, is now well established. We have shown that GTS-21, a selective α7 nAChR agonist, downregulates APC-dependent CD4+ T cell differentiation into regulatory T cells (Tregs) and effector Th1, Th2 and Th17 cells by inhibiting antigen processing, thereby interfering with antigen presentation. α7 nAChRs on Jurkat human leukemic T cells require functional T cell receptors (TCRs)/CD3 and leukocyte-specific tyrosine kinase to mediate nicotine-induced Ca2+-signaling via Ca2+ release from intracellular stores, and are insensitive to two conventional α7 nAChR antagonists, α-bungarotoxin (α-BTX) and methyllycaconitine (MLA). We investigated the effects of GTS-21, α-BTX and MLA on ovalbumin (OVA)-induced Th cytokine release from spleen cells isolated from OVA-specific TCR transgenic DO11.10 mice. We found that: (1) GTS-21 dose-dependently suppresses OVA-induced IFN-γ, IL-4 and IL-17 release, but neither α-BTX nor MLA alone affected the OVA-induced cytokine release. (2) Neither α-BTX nor MLA abolished the suppressive effects of GTS-21 on IFN-γ and IL-17 release from OVA-activated DO11.10 spleen cells. (3) GTS-21 significantly suppressed OVA-induced APC-dependent CD4+ T cell differentiation into Tregs. Neither MLA nor mecamylamine, a non-specific nAChR antagonist, abolished the suppressive effect of GTS-21 on Treg differentiation. These results suggest that α7 nAChRs on APCs involved in cytokine synthesis and T cell differentiation are insensitive to the conventional α7 nAChR antagonists, α-BTX and MLA, and that α7 nAChRs on APCs differ pharmacologically from those in neurons.
Collapse
|
31
|
Liu W, Li MD. Insights Into Nicotinic Receptor Signaling in Nicotine Addiction: Implications for Prevention and Treatment. Curr Neuropharmacol 2018; 16:350-370. [PMID: 28762314 PMCID: PMC6018190 DOI: 10.2174/1570159x15666170801103009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 06/18/2017] [Accepted: 07/28/2017] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Nicotinic acetylcholine receptors (nAChRs) belong to the Cys-loop ligandgated ion-channel (LGIC) superfamily, which also includes the GABA, glycine, and serotonin receptors. Many nAChR subunits have been identified and shown to be involved in signal transduction on binding to them of either the neurotransmitter acetylcholine or exogenous ligands such as nicotine. The nAChRs are pentameric assemblies of homologous subunits surrounding a central pore that gates cation flux, and they are expressed at neuromuscular junctions throughout the nervous system. METHODS AND RESULTS Because different nAChR subunits assemble into a variety of pharmacologically distinct receptor subtypes, and different nAChRs are implicated in various physiological functions and pathophysiological conditions, nAChRs represent potential molecular targets for drug addiction and medical therapeutic research. This review intends to provide insights into recent advances in nAChR signaling, considering the subtypes and subunits of nAChRs and their roles in nicotinic cholinergic systems, including structure, diversity, functional allosteric modulation, targeted knockout mutations, and rare variations of specific subunits, and the potency and functional effects of mutations by focusing on their effects on nicotine addiction (NA) and smoking cessation (SC). Furthermore, we review the possible mechanisms of action of nAChRs in NA and SC based on our current knowledge. CONCLUSION Understanding these cellular and molecular mechanisms will lead to better translational and therapeutic operations and outcomes for the prevention and treatment of NA and other drug addictions, as well as chronic diseases, such as Alzheimer's and Parkinson's. Finally, we put forward some suggestions and recommendations for therapy and treatment of NA and other chronic diseases.
Collapse
Affiliation(s)
- Wuyi Liu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University School of Medicine, Hangzhou, China.,School of Biological Sciences and Food Engineering, Fuyang Normal University, Fuyang, Anuhi 236041, China
| | - Ming D Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University School of Medicine, Hangzhou, China.,Research Center for Air Pollution and Health, Zhejiang University, Hangzhou, China.,Institute of NeuroImmune Pharmacology, Seton Hall University, South Orange, NJ, United States
| |
Collapse
|
32
|
Zoli M, Pucci S, Vilella A, Gotti C. Neuronal and Extraneuronal Nicotinic Acetylcholine Receptors. Curr Neuropharmacol 2018; 16:338-349. [PMID: 28901280 PMCID: PMC6018187 DOI: 10.2174/1570159x15666170912110450] [Citation(s) in RCA: 159] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 08/08/2017] [Accepted: 09/03/2017] [Indexed: 02/08/2023] Open
Abstract
Neuronal nicotinic acetylcholine receptors (nAChRs) belong to a super-family of Cys-loop ligand-gated ion chan-nels that respond to endogenous acetylcholine (ACh) or other cholinergic ligands. These receptors are also the targets of drugs such as nicotine (the main addictive agent delivered by cigarette smoke) and are involved in a variety of physiological and pathophysiological processes. Numerous studies have shown that the expression and/or function of nAChRs is com-promised in many neurological and psychiatric diseases. Furthermore, recent studies have shown that neuronal nAChRs are found in a large number of non-neuronal cell types in-cluding endothelial cells, glia, immune cells, lung epithelia and cancer cells where they regulate cell differentiation, prolifera-tion and inflammatory responses. The aim of this review is to describe the most recent findings concerning the structure and function of native nAChRs inside and outside the nervous system.
Collapse
Affiliation(s)
- Michele Zoli
- Department of Biomedical, Metabolic and Neural Sciences, Center for Neuroscience and Neurotechnology, University of Modena and Reggio Emilia, Modena, Italy
| | - Susanna Pucci
- CNR, Neuroscience Institute-Milano, Biometra University of Milan, Milan, Italy
| | - Antonietta Vilella
- Department of Biomedical, Metabolic and Neural Sciences, Center for Neuroscience and Neurotechnology, University of Modena and Reggio Emilia, Modena, Italy
| | - Cecilia Gotti
- CNR, Neuroscience Institute-Milano, Biometra University of Milan, Milan, Italy
| |
Collapse
|
33
|
Alzarea S, Rahman S. Effects of alpha-7 nicotinic allosteric modulator PNU 120596 on depressive-like behavior after lipopolysaccharide administration in mice. Prog Neuropsychopharmacol Biol Psychiatry 2018; 86:218-228. [PMID: 29800595 DOI: 10.1016/j.pnpbp.2018.05.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/19/2018] [Accepted: 05/21/2018] [Indexed: 01/08/2023]
Abstract
Evidence suggests that α7 nicotinic acetylcholine receptor (α7 nAChR) in the central nervous system has a critical role in the regulation of microglial function and neuroinflammation associated with the pathophysiology of major depressive disorder. The objectives of the present study were to determine the effects of PNU 120596, an α7 nAChR positive allosteric modulator (PAM), on depressive-like behavior and expression of ionized calcium binding adaptor molecule 1 (Iba-1), a microglial marker, in male C57BL/6J mice following lipopolysaccharide (LPS) administration, an animal model for depressive-like behavior. Forced swim test (FST), tail suspension test (TST), and sucrose preference test were used to determine the effects of PNU 120596 on depressive-like behavior, measured by increased immobility time or decreased sucrose preference. We also examined the effects of PNU 120596 on Iba-1 expression by using Western blot analysis and immunofluorescence staining in the hippocampus and prefrontal cortex, the brain regions implicated in major depressive disorder. Administration of LPS (1 mg/kg, i.p.) significantly increased immobility time during FST and TST and decreased sucrose preference. The PNU 120596 (1 or 4 mg/kg, i.p.) dose-dependently prevented LPS-induced depressive-like behavior during FST, TST, and sucrose preference test. The PNU 120596 (1 or 4 mg/kg) alone did not show any significant alteration on immobility time and sucrose preference. Pretreatment of methyllycaconitine (3 mg/kg, i.p.), an α7 nAChR antagonist, significantly prevented the antidepressant-like effects of PNU (4 mg/kg). Similarly, the PNU 120596 (4 mg/kg, i.p.) significantly reduced LPS-induced increased expression of Iba-1 in the hippocampus or prefrontal cortex. Overall, these results suggest that PNU 120596 reduces LPS-induced depressive-like behavior and microglial activation in the hippocampus and prefrontal cortex in mice. Therefore, α7 nAChR PAMs could be developed as potential therapeutic utility for the treatment of major depressive disorder in humans.
Collapse
Affiliation(s)
- Sami Alzarea
- Department of Pharmaceutical Sciences, College of Pharmacy, South Dakota State University, Brookings, SD 57007, USA
| | - Shafiqur Rahman
- Department of Pharmaceutical Sciences, College of Pharmacy, South Dakota State University, Brookings, SD 57007, USA.
| |
Collapse
|
34
|
Jackson A, Papke RL, Damaj MI. Pharmacological modulation of the α7 nicotinic acetylcholine receptor in a mouse model of mecamylamine-precipitated nicotine withdrawal. Psychopharmacology (Berl) 2018; 235:1897-1905. [PMID: 29549391 PMCID: PMC6015775 DOI: 10.1007/s00213-018-4879-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 03/08/2018] [Indexed: 12/26/2022]
Abstract
RATIONALE Recent preclinical data has implicated the α7 nicotinic acetylcholine receptor (nAChR) as a target in modulating nicotine reward. However, the role of the channel properties of the α7 nAChR in nicotine withdrawal is unknown. OBJECTIVES This study aimed to investigate the impact of α7 nAChR pharmacological modulation on mecamylamine-precipitated nicotine withdrawal behaviors in mice by using positive allosteric modulators (PAMs). METHODS The effect of the orthosteric α7 nAChR full agonist PNU282987 (1, 3, 9 mg/kg, s.c.), type I α7 PAM NS1738 (1 and 10 mg/kg; i.p.) and the type II α7 PAM PNU120596 (3 and 9 mg/kg, i.p.) on anxiety-like behavior, somatic signs, and hyperalgesia was measured in mice undergoing mecamylamine-precipitated nicotine withdrawal. Mice were infused with 24 mg/kg/day nicotine or saline for 14 days using s.c. osmotic minipumps. Nicotine withdrawal signs were precipitated upon administration of the non-selective nAChR antagonist mecamylamine (3.5 mg/kg, i.p.). RESULTS Anxiety-like behavior in nicotine withdrawn mice was only attenuated by PNU282987 in a dose-related fashion. Somatic signs were reduced by PNU282987 and NS1738. PNU120596 was the only compound that reversed precipitated nicotine withdrawal-induced hyperalgesia. CONCLUSIONS Taken together, our results suggest that modulation of the α7 nAChR can play important roles in mecamylamine-precipitated nicotine withdrawal behaviors in mice. In addition, the effects of PAMs in this study suggest that endogenous acetylcholine/choline tone is sufficient to attenuate some aspects of precipitated nicotine withdrawal. These findings highlight a beneficial effect of using α7 nAChR PAMs in some aspects of precipitated nicotine withdrawal.
Collapse
Affiliation(s)
- Asti Jackson
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.
| | - Roger L. Papke
- Department of Pharmacology and Therapeutics, University of Florida, PO Box 100267 Gainesville, FL 32610-0267
| | - M. Imad Damaj
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond VA, USA
| |
Collapse
|
35
|
King JR, Ullah A, Bak E, Jafri MS, Kabbani N. Ionotropic and Metabotropic Mechanisms of Allosteric Modulation of α7 Nicotinic Receptor Intracellular Calcium. Mol Pharmacol 2018; 93:601-611. [PMID: 29588343 PMCID: PMC11033947 DOI: 10.1124/mol.117.111401] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 03/23/2018] [Indexed: 12/13/2022] Open
Abstract
The pharmacological targeting of the α7 nicotinic acetylcholine receptor (α7) is a promising strategy in the development of new drugs for neurologic diseases. Because α7 receptors regulate cellular calcium, we investigated how the prototypical type II-positive allosteric modulator PNU120596 affects α7-mediated calcium signaling. Live imaging experiments show that PNU120596 augments ryanodine receptor-driven calcium-induced calcium release (CICR), inositol-induced calcium release (IICR), and phospholipase C activation by the α7 receptor. Both influx of calcium through the α7 nicotinic acetylcholine receptor (nAChR) channel as well as the binding of intracellular G proteins were involved in the effect of PNU120596 on intracellular calcium. This is evidenced by the findings that chelation of extracellular calcium, expression of α7D44A or α7345-348A mutant subunits, or blockade of calcium store release compromised the ability of PNU120596 to increase intracellular calcium transients generated by α7 ligand activation. Spatiotemporal stochastic modeling of calcium transient responses corroborates these results and indicates that α7 receptor activation enables calcium microdomains locally and to lesser extent in the distant cytosol. From the model, allosteric modulation of the receptor activates CICR locally via ryanodine receptors and augments IICR through enhanced calcium influx due to prolonged α7 nAChR opening. These findings provide a new mechanistic framework for understanding the effect of α7 receptor allosteric modulation on both local and global calcium dynamics.
Collapse
Affiliation(s)
- Justin R King
- Interdisciplinary Program in Neuroscience (J.R.K., M.S.J., N.K.) and School of Systems Biology (A.U., E.B., M.S.J., N.K.), George Mason University, Fairfax, Virginia
| | - Aman Ullah
- Interdisciplinary Program in Neuroscience (J.R.K., M.S.J., N.K.) and School of Systems Biology (A.U., E.B., M.S.J., N.K.), George Mason University, Fairfax, Virginia
| | - Ellen Bak
- Interdisciplinary Program in Neuroscience (J.R.K., M.S.J., N.K.) and School of Systems Biology (A.U., E.B., M.S.J., N.K.), George Mason University, Fairfax, Virginia
| | - M Saleet Jafri
- Interdisciplinary Program in Neuroscience (J.R.K., M.S.J., N.K.) and School of Systems Biology (A.U., E.B., M.S.J., N.K.), George Mason University, Fairfax, Virginia
| | - Nadine Kabbani
- Interdisciplinary Program in Neuroscience (J.R.K., M.S.J., N.K.) and School of Systems Biology (A.U., E.B., M.S.J., N.K.), George Mason University, Fairfax, Virginia
| |
Collapse
|
36
|
Delgado-Vélez M, Lasalde-Dominicci JA. The Cholinergic Anti-Inflammatory Response and the Role of Macrophages in HIV-Induced Inflammation. Int J Mol Sci 2018; 19:ijms19051473. [PMID: 29772664 PMCID: PMC5983673 DOI: 10.3390/ijms19051473] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/11/2018] [Accepted: 04/29/2018] [Indexed: 12/20/2022] Open
Abstract
Macrophages are phagocytic immune cells that protect the body from foreign invaders and actively support the immune response by releasing anti- and proinflammatory cytokines. A seminal finding revolutionized the way macrophages are seen. The expression of the neuronal alpha7 nicotinic acetylcholine receptor (α7-nAChR) in macrophages led to the establishment of the cholinergic anti-inflammatory response (CAR) in which the activation of this receptor inactivates macrophage production of proinflammatory cytokines. This novel neuroimmune response soon began to emerge as a potential target to counteract inflammation during illness and infection states. Human immunodeficiency virus (HIV)-infected individuals suffer from chronic inflammation that persists even under antiretroviral therapy. Despite the CAR’s importance, few studies involving macrophages have been performed in the HIV field. Evidence demonstrates that monocyte-derived macrophages (MDMs) recovered from HIV-infected individuals are upregulated for α7-nAChR. Moreover, in vitro studies demonstrate that addition of an HIV viral constituent, gp120IIIB, to uninfected MDMs also upregulates the α7-nAChR. Importantly, contrary to what was expected, activation of upregulated α7-nAChRs in macrophages does not reduce inflammation, suggesting a CAR disruption. Although it is reasonable to consider this receptor as a pharmacological target, additional studies are necessary since its activity seems to differ from that observed in neurons.
Collapse
Affiliation(s)
- Manuel Delgado-Vélez
- Molecular Sciences Research Center, University of Puerto Rico, San Juan 00926, Puerto Rico.
| | - José A Lasalde-Dominicci
- Molecular Sciences Research Center, University of Puerto Rico, San Juan 00926, Puerto Rico.
- Department of Biology, University of Puerto Rico, Río Piedras Campus, San Juan 00931, Puerto Rico.
- Department of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan 00931, Puerto Rico.
| |
Collapse
|
37
|
King JR, Kabbani N. Alpha 7 nicotinic receptors attenuate neurite development through calcium activation of calpain at the growth cone. PLoS One 2018; 13:e0197247. [PMID: 29768467 PMCID: PMC5955587 DOI: 10.1371/journal.pone.0197247] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 04/30/2018] [Indexed: 11/18/2022] Open
Abstract
The α7 nicotinic acetylcholine receptor (nAChR) is a ligand-gated ion channel that plays an important role in cellular calcium signaling contributing to synaptic development and plasticity, and is a key drug target for the treatment of neurodegenerative conditions such as Alzheimer's disease. Here we show that α7 nAChR mediated calcium signals in differentiating PC12 cells activate the proteolytic enzyme calpain leading to spectrin breakdown, microtubule retraction, and attenuation in neurite growth. Imaging in growth cones confirms that α7 activation decreases EB3 comet motility in a calcium dependent manner as demonstrated by the ability of α7 nAChR, ryanodine, or IP3 receptor antagonists to block the effect of α7 nAChR on growth. α7 nAChR mediated EB3 comet motility, spectrin breakdown, and neurite growth was also inhibited by the addition of the selective calpain blocker calpeptin and attenuated by the expression of an α7 subunit unable to bind Gαq and activate calcium store release. The findings indicate that α7 nAChRs regulate cytoskeletal dynamics through local calcium signals for calpain protease activity.
Collapse
Affiliation(s)
- Justin R. King
- School of Systems Biology, George Mason University, Fairfax, Virginia, United States of America
| | - Nadine Kabbani
- School of Systems Biology, George Mason University, Fairfax, Virginia, United States of America
- * E-mail:
| |
Collapse
|
38
|
Gielen M, Corringer P. The dual-gate model for pentameric ligand-gated ion channels activation and desensitization. J Physiol 2018; 596:1873-1902. [PMID: 29484660 PMCID: PMC5978336 DOI: 10.1113/jp275100] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 01/17/2018] [Accepted: 01/17/2018] [Indexed: 12/15/2022] Open
Abstract
Pentameric ligand-gated ion channels (pLGICs) mediate fast neurotransmission in the nervous system. Their dysfunction is associated with psychiatric, neurological and neurodegenerative disorders such as schizophrenia, epilepsy and Alzheimer's disease. Understanding their biophysical and pharmacological properties, at both the functional and the structural level, thus holds many therapeutic promises. In addition to their agonist-elicited activation, most pLGICs display another key allosteric property, namely desensitization, in which they enter a shut state refractory to activation upon sustained agonist binding. While the activation mechanisms of several pLGICs have been revealed at near-atomic resolution, the structural foundation of desensitization has long remained elusive. Recent structural and functional data now suggest that the activation and desensitization gates are distinct, and are located at both sides of the ion channel. Such a 'dual gate mechanism' accounts for the marked allosteric effects of channel blockers, a feature illustrated herein by theoretical kinetics simulations. Comparison with other classes of ligand- and voltage-gated ion channels shows that this dual gate mechanism emerges as a common theme for the desensitization and inactivation properties of structurally unrelated ion channels.
Collapse
Affiliation(s)
- Marc Gielen
- Channel Receptors UnitInstitut PasteurCNRS UMR 3571ParisFrance
| | | |
Collapse
|
39
|
Siebers K, Fink B, Zakrzewicz A, Agné A, Richter K, Konzok S, Hecker A, Zukunft S, Küllmar M, Klein J, McIntosh JM, Timm T, Sewald K, Padberg W, Aggarwal N, Chamulitrat W, Santoso S, Xia W, Janciauskiene S, Grau V. Alpha-1 Antitrypsin Inhibits ATP-Mediated Release of Interleukin-1β via CD36 and Nicotinic Acetylcholine Receptors. Front Immunol 2018; 9:877. [PMID: 29922281 PMCID: PMC5996888 DOI: 10.3389/fimmu.2018.00877] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 04/09/2018] [Indexed: 12/30/2022] Open
Abstract
While interleukin (IL)-1β is a potent pro-inflammatory cytokine involved in host defense, high levels can cause life-threatening sterile inflammation including systemic inflammatory response syndrome. Hence, the control of IL-1β secretion is of outstanding biomedical importance. In response to a first inflammatory stimulus such as lipopolysaccharide, pro-IL-1β is synthesized as a cytoplasmic inactive pro-form. Extracellular ATP originating from injured cells is a prototypical second signal for inflammasome-dependent maturation and release of IL-1β. The human anti-protease alpha-1 antitrypsin (AAT) and IL-1β regulate each other via mechanisms that are only partially understood. Here, we demonstrate that physiological concentrations of AAT efficiently inhibit ATP-induced release of IL-1β from primary human blood mononuclear cells, monocytic U937 cells, and rat lung tissue, whereas ATP-independent IL-1β release is not impaired. Both, native and oxidized AAT are active, suggesting that the inhibition of IL-1β release is independent of the anti-elastase activity of AAT. Signaling of AAT in monocytic cells involves the lipid scavenger receptor CD36, calcium-independent phospholipase A2β, and the release of a small soluble mediator. This mediator leads to the activation of nicotinic acetylcholine receptors, which efficiently inhibit ATP-induced P2X7 receptor activation and inflammasome assembly. We suggest that AAT controls ATP-induced IL-1β release from human mononuclear blood cells by a novel triple-membrane-passing signaling pathway. This pathway may have clinical implications for the prevention of sterile pulmonary and systemic inflammation.
Collapse
Affiliation(s)
- Kathrin Siebers
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus Liebig University Giessen, German Centre for Lung Research, Giessen, Germany
| | - Bijan Fink
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus Liebig University Giessen, German Centre for Lung Research, Giessen, Germany
| | - Anna Zakrzewicz
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus Liebig University Giessen, German Centre for Lung Research, Giessen, Germany
| | - Alisa Agné
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus Liebig University Giessen, German Centre for Lung Research, Giessen, Germany
| | - Katrin Richter
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus Liebig University Giessen, German Centre for Lung Research, Giessen, Germany
| | - Sebastian Konzok
- Fraunhofer Institute for Toxicology and Experimental Medicine, German Centre for Lung Research, Hannover, Germany
| | - Andreas Hecker
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus Liebig University Giessen, German Centre for Lung Research, Giessen, Germany
| | - Sven Zukunft
- Institute of Vascular Signalling, Centre for Molecular Medicine, Goethe University, Frankfurt, Germany
| | - Mira Küllmar
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus Liebig University Giessen, German Centre for Lung Research, Giessen, Germany
| | - Jochen Klein
- Department of Pharmacology, Goethe University College of Pharmacy, Frankfurt, Germany
| | - J Michael McIntosh
- Department of Biology, University of Utah, Salt Lake City, UT, United States.,George E. Wahlen Veterans Affairs Medical Center, Salt Lake City, UT, United States.,Department of Psychiatry, University of Utah, Salt Lake City, UT, United States
| | - Thomas Timm
- Protein Analytics, Institute of Biochemistry, Justus Liebig University Giessen, Giessen, Germany
| | - Katherina Sewald
- Fraunhofer Institute for Toxicology and Experimental Medicine, German Centre for Lung Research, Hannover, Germany
| | - Winfried Padberg
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus Liebig University Giessen, German Centre for Lung Research, Giessen, Germany
| | - Nupur Aggarwal
- Department of Respiratory Medicine, Hannover Medical School, German Centre for Lung Research, Hannover, Germany
| | - Walee Chamulitrat
- Department of Internal Medicine IV, University Heidelberg Hospital, Heidelberg, Germany
| | - Sentot Santoso
- Institute for Clinical Immunology and Transfusion Medicine, Justus Liebig University Giessen, Giessen, Germany
| | - Wendy Xia
- Institute of Blood Transfusion, Guangzhou Blood Centre, Guangzhou, China
| | - Sabina Janciauskiene
- Department of Respiratory Medicine, Hannover Medical School, German Centre for Lung Research, Hannover, Germany
| | - Veronika Grau
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus Liebig University Giessen, German Centre for Lung Research, Giessen, Germany
| |
Collapse
|
40
|
Kabbani N, Nichols RA. Beyond the Channel: Metabotropic Signaling by Nicotinic Receptors. Trends Pharmacol Sci 2018; 39:354-366. [PMID: 29428175 DOI: 10.1016/j.tips.2018.01.002] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 01/05/2018] [Accepted: 01/08/2018] [Indexed: 01/01/2023]
Abstract
The α7 nicotinic acetylcholine receptor (nAChR) is a ligand-gated ion channel (LGIC) that plays an important role in cellular calcium signaling and contributes to several neurological diseases. Agonist binding to the α7 nAChR induces fast channel activation followed by inactivation and prolonged desensitization while triggering long-lasting calcium signaling. These activities foster neurotransmitter release, synaptic plasticity, and somatodendritic regulation in the brain. We discuss here the ability of α7 nAChRs to operate in ionotropic (α7i) and metabotropic (α7m) modes, leading to calcium-induced calcium release (CICR) and G protein-associated inositol trisphosphate (IP3)-induced calcium release (IICR), respectively. Metabotropic activity extends the spatial and temporal aspects of calcium signaling by the α7 channel beyond its ionotropic limits, persisting into the desensitized state. Delineation of the ionotropic and metabotropic properties of the α7 nAChR will provide definitive indicators of moment-to-moment receptor functional status that will, in turn, spearhead new drug development.
Collapse
Affiliation(s)
- Nadine Kabbani
- School of Systems Biology, George Mason University, Manassas, VA 20110, USA.
| | - Robert A Nichols
- Department of Cell and Molecular Biology, University of Hawai'i at Manoa, Honolulu, HI 96813, USA
| |
Collapse
|
41
|
Sherman SP, Bang AG. High-throughput screen for compounds that modulate neurite growth of human induced pluripotent stem cell-derived neurons. Dis Model Mech 2018; 11:dmm.031906. [PMID: 29361516 PMCID: PMC5894944 DOI: 10.1242/dmm.031906] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 12/29/2017] [Indexed: 01/01/2023] Open
Abstract
Development of technology platforms to perform compound screens of human induced pluripotent stem cell (hiPSC)-derived neurons with relatively high throughput is essential to realize their potential for drug discovery. Here, we demonstrate the feasibility of high-throughput screening of hiPSC-derived neurons using a high-content, image-based approach focused on neurite growth, a process that is fundamental to formation of neural networks and nerve regeneration. From a collection of 4421 bioactive small molecules, we identified 108 hit compounds, including 37 approved drugs, that target molecules or pathways known to regulate neurite growth, as well as those not previously associated with this process. These data provide evidence that many pathways and targets known to play roles in neurite growth have similar activities in hiPSC-derived neurons that can be identified in an unbiased phenotypic screen. The data also suggest that hiPSC-derived neurons provide a useful system to study the mechanisms of action and off-target activities of the approved drugs identified as hits, leading to a better understanding of their clinical efficacy and toxicity, especially in the context of specific human genetic backgrounds. Finally, the hit set we report constitutes a sublibrary of approved drugs and tool compounds that modulate neurites. This sublibrary will be invaluable for phenotypic analyses and interrogation of hiPSC-based disease models as probes for defining phenotypic differences and cellular vulnerabilities in patient versus control cells, as well as for investigations of the molecular mechanisms underlying human neurite growth in development and maintenance of neuronal networks, and nerve regeneration. Summary: High-throughput, small molecule screening of hiPSC-derived neurons using a high-content, image-based approach focused on neurite growth identified hit compounds, including approved drugs, which target molecules or pathways known to regulate neurite growth.
Collapse
Affiliation(s)
- Sean P Sherman
- Conrad Prebys Center for Chemical Genomics, Sanford Burnham Prebys Medical Discovery Institute La Jolla, CA 92037, USA
| | - Anne G Bang
- Conrad Prebys Center for Chemical Genomics, Sanford Burnham Prebys Medical Discovery Institute La Jolla, CA 92037, USA
| |
Collapse
|
42
|
Bagdas D, Gurun MS, Flood P, Papke RL, Damaj MI. New Insights on Neuronal Nicotinic Acetylcholine Receptors as Targets for Pain and Inflammation: A Focus on α7 nAChRs. Curr Neuropharmacol 2018; 16:415-425. [PMID: 28820052 PMCID: PMC6018191 DOI: 10.2174/1570159x15666170818102108] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/20/2017] [Accepted: 08/16/2017] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Nicotine and nicotinic acetylcholine receptors (nAChRs) have been explored for the past three decades as targets for pain control. The aim of this review is to introduce readers particularly to α7 nAChRs in a perspective of pain and its modulation. METHODS Developments for α7 nAChR modulators and recent animal studies related to pain are reviewed. RESULTS Accumulating evidences suggest that selective ligands for α7 nAChRs hold promise in the treatment of chronic pain conditions as they lack many of side effects associated with other nicotinic receptor types. CONCLUSION This review provides the reader recent insights on α7 nAChRs from structure and function to the latest findings on the pharmacology and therapeutic targeting of these receptors for the treatment of pain and inflammation.
Collapse
Affiliation(s)
- Deniz Bagdas
- Address correspondence to this author at the Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA 23298-0613; Tel/Fax: +1-804-828-9256; E-mail:
| | | | | | | | | |
Collapse
|
43
|
Lacivita E, Perrone R, Margari L, Leopoldo M. Targets for Drug Therapy for Autism Spectrum Disorder: Challenges and Future Directions. J Med Chem 2017; 60:9114-9141. [PMID: 29039668 DOI: 10.1021/acs.jmedchem.7b00965] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by persistent deficits in social communication and interaction and restricted, repetitive patterns of behavior, interests, and activities. Various factors are involved in the etiopathogenesis of ASD, including genetic factors, environmental toxins and stressors, impaired immune responses, mitochondrial dysfunction, and neuroinflammation. The heterogeneity in the phenotype among ASD patients and the complex etiology of the condition have long impeded the advancement of the development of pharmacological therapies. In the recent years, the integration of findings from mouse models to human genetics resulted in considerable progress toward the understanding of ASD pathophysiology. Currently, strategies to treat core symptoms of ASD are directed to correct synaptic dysfunctions, abnormalities in central oxytocin, vasopressin, and serotonin neurotransmission, and neuroinflammation. Here, we present a survey of the studies that have suggested molecular targets for drug development for ASD and the state-of-the-art of medicinal chemistry efforts in related areas.
Collapse
Affiliation(s)
- Enza Lacivita
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro , via Orabona 4, 70125, Bari, Italy
| | - Roberto Perrone
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro , via Orabona 4, 70125, Bari, Italy
| | - Lucia Margari
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Unità di Neuropsichiatria Infantile, Università degli Studi di Bari Aldo Moro , Piazza Giulio Cesare 11, 70124 Bari, Italy
| | - Marcello Leopoldo
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro , via Orabona 4, 70125, Bari, Italy
| |
Collapse
|
44
|
Effects of α-conotoxin ImI on TNF-α, IL-8 and TGF-β expression by human macrophage-like cells derived from THP-1 pre-monocytic leukemic cells. Sci Rep 2017; 7:12742. [PMID: 28986583 PMCID: PMC5630575 DOI: 10.1038/s41598-017-11586-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 08/25/2017] [Indexed: 12/16/2022] Open
Abstract
α7 nicotinic acetylcholine receptors (nAChRs) are ubiquitous in the nervous system and ensure important neurophysiological functionality for many processes. However, they are also found in cells of the immune system, where their role has been less studied. Here we report the pro-inflammatory effect of ImI, a well characterized conotoxin that inhibits α7 nAChRs, on differentiated THP-1 pre-monocyte macrophages (MDM) obtained by phorbol 12-myristate 13 acetate (PMA) treatment. Enzyme-linked immunosorbent assay (ELISA) performed on supernatant fluids of LPS challenged MDM showed ImI-mediated upregulation of pro-inflammatory cytokine TNF-α in an ImI concentration-dependent manner from 0.5 to 5.0 µmol/L and for IL-8 up to 1.0 µmol/L. Levels of anti-inflammatory cytokine TGF-β remained practically unaffected in ImI treated MDMs. Nicotine at 10 µmol/L significantly downregulated the release of TNF-α, but showed a lesser effect on IL-8 secretion and no effect on TGF-β. Fluorescent competitive assays involving ImI, α-bungarotoxin and nicotine using MDM and the murine macrophage RAW 264.7 suggest a common binding site in the α7 receptor. This work extends the application of conotoxins as molecular probes to non-excitatory cells, such as macrophages and supports the involvement of the α7 nAChR in regulating the inflammatory response via the cholinergic anti-inflammatory pathway (CAP).
Collapse
|
45
|
King JR, Gillevet TC, Kabbani N. A G protein-coupled α7 nicotinic receptor regulates signaling and TNF-α release in microglia. FEBS Open Bio 2017; 7:1350-1361. [PMID: 28904864 PMCID: PMC5586346 DOI: 10.1002/2211-5463.12270] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 07/14/2017] [Indexed: 11/21/2022] Open
Abstract
Acetylcholine activation of α7 nicotinic acetylcholine receptors (α7 nAChRs) in microglia attenuates neuroinflammation and regulates TNF‐α release. We used lipopolysaccharide to model inflammation in the microglial cell line EOC20 and examined signaling by the α7 nAChR. Co‐immunoprecipitation experiments confirm that α7 nAChRs bind heterotrimeric G proteins in EOC20 cells. Interaction with Gαi mediates α7 nAChR signaling via enhanced intracellular calcium release and a decrease in cAMP, p38 phosphorylation, and TNF‐α release. These α7 nAChR effects were blocked by the inhibition of Gαi signaling via pertussis toxin, PLC activity with U73122, and α7 nAChR channel activity with the selective antagonist α‐bungarotoxin. Moreover, α7 nAChR signaling in EOC20 cells was significantly diminished by the expression of a dominant‐negative α7 nAChR, α7345‐8A, shown to be impaired in G protein binding. These findings indicate an essential role for G protein coupling in α7 nAChR function in microglia leading to the regulation of inflammation in the nervous system.
Collapse
Affiliation(s)
- Justin R King
- Interdisciplinary Program in Neuroscience Krasnow Institute for Advanced Study George Mason University Fairfax VA USA
| | - Trudy C Gillevet
- Interdisciplinary Program in Neuroscience Krasnow Institute for Advanced Study George Mason University Fairfax VA USA
| | - Nadine Kabbani
- School of Systems Biology Krasnow Institute for Advanced Study George Mason University Fairfax VA USA
| |
Collapse
|
46
|
Zakrzewicz A, Richter K, Agné A, Wilker S, Siebers K, Fink B, Krasteva-Christ G, Althaus M, Padberg W, Hone AJ, McIntosh JM, Grau V. Canonical and Novel Non-Canonical Cholinergic Agonists Inhibit ATP-Induced Release of Monocytic Interleukin-1β via Different Combinations of Nicotinic Acetylcholine Receptor Subunits α7, α9 and α10. Front Cell Neurosci 2017; 11:189. [PMID: 28725182 PMCID: PMC5496965 DOI: 10.3389/fncel.2017.00189] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 06/20/2017] [Indexed: 12/22/2022] Open
Abstract
Recently, we discovered a cholinergic mechanism that inhibits the adenosine triphosphate (ATP)-dependent release of interleukin-1β (IL-1β) by human monocytes via nicotinic acetylcholine receptors (nAChRs) composed of α7, α9 and/or α10 subunits. Furthermore, we identified phosphocholine (PC) and dipalmitoylphosphatidylcholine (DPPC) as novel nicotinic agonists that elicit metabotropic activity at monocytic nAChR. Interestingly, PC does not provoke ion channel responses at conventional nAChRs composed of subunits α9 and α10. The purpose of this study is to determine the composition of nAChRs necessary for nicotinic signaling in monocytic cells and to test the hypothesis that common metabolites of phosphatidylcholines, lysophosphatidylcholine (LPC) and glycerophosphocholine (G-PC), function as nAChR agonists. In peripheral blood mononuclear cells from nAChR gene-deficient mice, we demonstrated that inhibition of ATP-dependent release of IL-1β by acetylcholine (ACh), nicotine and PC depends on subunits α7, α9 and α10. Using a panel of nAChR antagonists and siRNA technology, we confirmed the involvement of these subunits in the control of IL-1β release in the human monocytic cell line U937. Furthermore, we showed that LPC (C16:0) and G-PC efficiently inhibit ATP-dependent release of IL-1β. Of note, the inhibitory effects mediated by LPC and G-PC depend on nAChR subunits α9 and α10, but only to a small degree on α7. In Xenopuslaevis oocytes heterologously expressing different combinations of human α7, α9 or α10 subunits, ACh induced canonical ion channel activity, whereas LPC, G-PC and PC did not. In conclusion, we demonstrate that canonical nicotinic agonists and PC elicit metabotropic nAChR activity in monocytes via interaction of nAChR subunits α7, α9 and α10. For the metabotropic signaling of LPC and G-PC, nAChR subunits α9 and α10 are needed, whereas α7 is virtually dispensable. Furthermore, molecules bearing a PC group in general seem to regulate immune functions without perturbing canonical ion channel functions of nAChR.
Collapse
Affiliation(s)
- Anna Zakrzewicz
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University GiessenGiessen, Germany
| | - Katrin Richter
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University GiessenGiessen, Germany
| | - Alisa Agné
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University GiessenGiessen, Germany
| | - Sigrid Wilker
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University GiessenGiessen, Germany
| | - Kathrin Siebers
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University GiessenGiessen, Germany
| | - Bijan Fink
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University GiessenGiessen, Germany
| | - Gabriela Krasteva-Christ
- Institute of Anatomy and Cell Biology, Justus-Liebig-University GiessenGiessen, Germany.,Institute of Anatomy and Cell Biology, Saarland UniversityHomburg, Germany.,Member of the German Centre for Lung ResearchGiessen, Germany
| | - Mike Althaus
- Institute of Animal Physiology, Justus-Liebig-University GiessenGiessen, Germany.,School of Biology, Newcastle UniversityNewcastle upon Tyne, United Kingdom
| | - Winfried Padberg
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University GiessenGiessen, Germany
| | - Arik J Hone
- Department of Biology, University of UtahSalt Lake City, UT, United States
| | - J Michael McIntosh
- Department of Biology, University of UtahSalt Lake City, UT, United States.,George E. Wahlen Veterans Affairs Medical CenterSalt Lake City, UT, United States.,Department of Psychiatry, University of UtahSalt Lake City, UT, United States
| | - Veronika Grau
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University GiessenGiessen, Germany.,Member of the German Centre for Lung ResearchGiessen, Germany
| |
Collapse
|
47
|
The interaction between alpha 7 nicotinic acetylcholine receptor and nuclear peroxisome proliferator-activated receptor-α represents a new antinociceptive signaling pathway in mice. Exp Neurol 2017; 295:194-201. [PMID: 28606623 DOI: 10.1016/j.expneurol.2017.06.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Revised: 05/16/2017] [Accepted: 06/08/2017] [Indexed: 12/24/2022]
Abstract
Recently, α7 nicotinic acetylcholine receptors (nAChRs), primarily activated by binding of orthosteric agonists, represent a target for anti-inflammatory and analgesic drug development. These receptors may also be modulated by positive allosteric modulators (PAMs), ago-allosteric ligands (ago-PAMs), and α7-silent agonists. Activation of α7 nAChRs has been reported to increase the brain levels of endogenous ligands for nuclear peroxisome proliferator-activated receptors type-α (PPAR-α), palmitoylethanolamide (PEA) and oleoylethanolamide (OEA), in a Ca2+-dependent manner. Here, we investigated potential crosstalk between α7 nAChR and PPAR-α, using the formalin test, a mouse model of tonic pain. Using pharmacological and genetic approaches, we found that PNU282987, a full α7 agonist, attenuated formalin-induced nociceptive behavior in α7-dependent manner. Interestingly, the selective PPAR-α antagonist GW6471 blocked the antinociceptive effects of PNU282987, but did not alter the antinociceptive responses evoked by the α7 nAChR PAM PNU120596, ago-PAM GAT107, and silent agonist NS6740. Moreover, GW6471 administered systemically or spinally, but not via the intraplantar surface of the formalin-injected paw blocked PNU282987-induced antinociception. Conversely, exogenous administration of the naturally occurring PPAR-α agonist PEA potentiated the antinociceptive effects of PNU282987. In contrast, the cannabinoid CB1 antagonist rimonabant and the CB2 antagonist SR144528 failed to reverse the antinociceptive effects of PNU282987. These findings suggest that PPAR-α plays a key role in a putative antinociceptive α7 nicotinic signaling pathway.
Collapse
|
48
|
Ravelli KG, Ramos ADT, Gonçalves LB, Magnoli FC, Troncone LRP. Phoneutria nigriventer spider toxin Tx2-6 induces priapism in mice even after cavernosal denervation. Toxicon 2017; 130:29-34. [DOI: 10.1016/j.toxicon.2017.02.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 01/27/2017] [Accepted: 02/23/2017] [Indexed: 01/11/2023]
|
49
|
Crespi A, Colombo SF, Gotti C. Proteins and chemical chaperones involved in neuronal nicotinic receptor expression and function: an update. Br J Pharmacol 2017; 175:1869-1879. [PMID: 28294298 DOI: 10.1111/bph.13777] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 02/26/2017] [Accepted: 03/04/2017] [Indexed: 01/03/2023] Open
Abstract
Neuronal nicotinic ACh receptors (nAChRs) are a family of ACh-gated cation channels, and their homeostasis or proteostasis is essential for the correct physiology of the central and peripheral nervous systems. The proteostasis network regulates the folding, assembly, degradation and trafficking of nAChRs in order to ensure their efficient and functional expression at the cell surface. However, as nAChRs are multi-subunit, multi-span, integral membrane proteins, the folding and assembly is a very inefficient process, and only a small proportion of subunits can form functional pentamers. Moreover, the efficiency of assembly and trafficking varies widely depending on the nAChR subtypes and the cell type in which they are expressed. A detailed understanding of the mechanisms that regulate the functional expression of nAChRs in neurons and non-neuronal cells is therefore important. The purpose of this short review is to describe more recent findings concerning the chaperone proteins and target-specific and target-nonspecific pharmacological chaperones that modulate the expression of nAChR subtypes, and the possible mechanisms that underlie the dynamic changes of cell surface nAChRs. LINKED ARTICLES This article is part of a themed section on Nicotinic Acetylcholine Receptors. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v175.11/issuetoc.
Collapse
|
50
|
Lyukmanova EN, Shulepko MA, Shenkarev ZO, Bychkov ML, Paramonov AS, Chugunov AO, Kulbatskii DS, Arvaniti M, Dolejsi E, Schaer T, Arseniev AS, Efremov RG, Thomsen MS, Dolezal V, Bertrand D, Dolgikh DA, Kirpichnikov MP. Secreted Isoform of Human Lynx1 (SLURP-2): Spatial Structure and Pharmacology of Interactions with Different Types of Acetylcholine Receptors. Sci Rep 2016; 6:30698. [PMID: 27485575 PMCID: PMC4971505 DOI: 10.1038/srep30698] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 07/06/2016] [Indexed: 11/12/2022] Open
Abstract
Human-secreted Ly-6/uPAR-related protein-2 (SLURP-2) regulates the growth and differentiation of epithelial cells. Previously, the auto/paracrine activity of SLURP-2 was considered to be mediated via its interaction with the α3β2 subtype of the nicotinic acetylcholine receptors (nAChRs). Here, we describe the structure and pharmacology of a recombinant analogue of SLURP-2. Nuclear magnetic resonance spectroscopy revealed a 'three-finger' fold of SLURP-2 with a conserved β-structural core and three protruding loops. Affinity purification using cortical extracts revealed that SLURP-2 could interact with the α3, α4, α5, α7, β2, and β4 nAChR subunits, revealing its broader pharmacological profile. SLURP-2 inhibits acetylcholine-evoked currents at α4β2 and α3β2-nAChRs (IC50 ~0.17 and >3 μM, respectively) expressed in Xenopus oocytes. In contrast, at α7-nAChRs, SLURP-2 significantly enhances acetylcholine-evoked currents at concentrations <1 μM but induces inhibition at higher concentrations. SLURP-2 allosterically interacts with human M1 and M3 muscarinic acetylcholine receptors (mAChRs) that are overexpressed in CHO cells. SLURP-2 was found to promote the proliferation of human oral keratinocytes via interactions with α3β2-nAChRs, while it inhibited cell growth via α7-nAChRs. SLURP-2/mAChRs interactions are also probably involved in the control of keratinocyte growth. Computer modeling revealed possible SLURP-2 binding to the 'classical' orthosteric agonist/antagonist binding sites at α7 and α3β2-nAChRs.
Collapse
Affiliation(s)
- E. N. Lyukmanova
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya Street 16/10, Moscow 117997, Russian Federation
| | - M. A. Shulepko
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya Street 16/10, Moscow 117997, Russian Federation
| | - Z. O. Shenkarev
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya Street 16/10, Moscow 117997, Russian Federation
- Moscow Institute of Physics and Technology, Institutskiy Pereulok 9, Dolgoprudny, Moscow Region 141700, Russian Federation
| | - M. L. Bychkov
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya Street 16/10, Moscow 117997, Russian Federation
| | - A. S. Paramonov
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya Street 16/10, Moscow 117997, Russian Federation
| | - A. O. Chugunov
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya Street 16/10, Moscow 117997, Russian Federation
| | - D. S. Kulbatskii
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya Street 16/10, Moscow 117997, Russian Federation
| | - M. Arvaniti
- Department of Drug Design and Pharmacology, University of Copenhagen, Jagtvej 160, DK-2100 Copenhagen, Denmark
| | - Eva Dolejsi
- Institute of Physiology, Academy of Sciences of the Czech Republic (public research institution), Prague, 14220, Czech Republic
| | - T. Schaer
- HiQScreen Sàrl, 6 rte de Compois, 1222, Vésenaz, Geneva, Switzerland
| | - A. S. Arseniev
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Moscow Institute of Physics and Technology, Institutskiy Pereulok 9, Dolgoprudny, Moscow Region 141700, Russian Federation
| | - R. G. Efremov
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- National Research University Higher School of Economics, Myasnitskaya ul. 20, 101000 Moscow, Russia
| | - M. S. Thomsen
- Department of Drug Design and Pharmacology, University of Copenhagen, Jagtvej 160, DK-2100 Copenhagen, Denmark
| | - V. Dolezal
- Institute of Physiology, Academy of Sciences of the Czech Republic (public research institution), Prague, 14220, Czech Republic
| | - D. Bertrand
- HiQScreen Sàrl, 6 rte de Compois, 1222, Vésenaz, Geneva, Switzerland
| | - D. A. Dolgikh
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya Street 16/10, Moscow 117997, Russian Federation
| | - M. P. Kirpichnikov
- Lomonosov Moscow State University, Leninskie Gori 1, Moscow 119234, Russian Federation
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya Street 16/10, Moscow 117997, Russian Federation
| |
Collapse
|