1
|
Andrew PM, Feng W, Calsbeek JJ, Antrobus SP, Cherednychenko GA, MacMahon JA, Bernardino PN, Liu X, Harvey DJ, Lein PJ, Pessah IN. The α4 Nicotinic Acetylcholine Receptor Is Necessary for the Initiation of Organophosphate-Induced Neuronal Hyperexcitability. TOXICS 2024; 12:263. [PMID: 38668486 PMCID: PMC11054284 DOI: 10.3390/toxics12040263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/20/2024] [Accepted: 03/27/2024] [Indexed: 04/29/2024]
Abstract
Acute intoxication with organophosphorus (OP) cholinesterase inhibitors can produce seizures that rapidly progress to life-threatening status epilepticus. Significant research effort has been focused on investigating the involvement of muscarinic acetylcholine receptors (mAChRs) in OP-induced seizure activity. In contrast, there has been far less attention on nicotinic AChRs (nAChRs) in this context. Here, we address this data gap using a combination of in vitro and in vivo models. Pharmacological antagonism and genetic deletion of α4, but not α7, nAChR subunits prevented or significantly attenuated OP-induced electrical spike activity in acute hippocampal slices and seizure activity in mice, indicating that α4 nAChR activation is necessary for neuronal hyperexcitability triggered by acute OP exposures. These findings not only suggest that therapeutic strategies for inhibiting the α4 nAChR subunit warrant further investigation as prophylactic and immediate treatments for acute OP-induced seizures, but also provide mechanistic insight into the role of the nicotinic cholinergic system in seizure generation.
Collapse
Affiliation(s)
- Peter M. Andrew
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| | - Wei Feng
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| | - Jonas J. Calsbeek
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| | - Shane P. Antrobus
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| | - Gennady A. Cherednychenko
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| | - Jeremy A. MacMahon
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| | - Pedro N. Bernardino
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| | - Xiuzhen Liu
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| | - Danielle J. Harvey
- Department of Public Health Sciences, UC Davis School of Medicine, Davis, CA 95616, USA;
| | - Pamela J. Lein
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| | - Isaac N. Pessah
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA; (P.M.A.); (W.F.); (J.J.C.); (S.P.A.); (G.A.C.); (J.A.M.); (P.N.B.); (X.L.)
| |
Collapse
|
2
|
Laikowski MM, Reisdorfer F, Moura S. NAChR α4β2 Subtype and their Relation with Nicotine Addiction, Cognition, Depression and Hyperactivity Disorder. Curr Med Chem 2019; 26:3792-3811. [PMID: 29637850 DOI: 10.2174/0929867325666180410105135] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 12/27/2017] [Accepted: 04/05/2018] [Indexed: 01/07/2023]
Abstract
BACKGROUND Neuronal α4β2 nAChRs are receptors involved in the role of neurotransmitters regulation and release, and this ionic channel participates in biological process of memory, learning and attention. This work aims to review the structure and functioning of the α4β2 nAChR emphasizing its role in the treatment of associated diseases like nicotine addiction and underlying pathologies such as cognition, depression and attention-deficit hyperactivity disorder. METHODS The authors realized extensive bibliographic research using the descriptors "Nicotine Receptor α4β2" and "cognition", "depression", "attention-deficit hyperactivity disorder", besides cross-references of the selected articles and after analysis of references in the specific literature. RESULTS As results, it was that found 179 relevant articles presenting the main molecules with affinity to nAChR α4β2 related to the cited diseases. The α4β2 nAChR subtype is a remarkable therapeutic target since this is the most abundant receptor in the central nervous system. CONCLUSION In summary, this review presents perspectives on the pharmacology and therapeutic targeting of α4β2 nAChRs for the treatment of cognition and diseases like nicotine dependence, depression and attention-deficit hyperactivity disorder.
Collapse
Affiliation(s)
- Manuela M Laikowski
- Laboratory of Natural and Synthetics Products, University of Caxias do Sul, Caxias do Sul, Brazil
| | - Fávero Reisdorfer
- Laboratory of Drug Development and Quality Control, University Federal of Pampa, Brazil
| | - Sidnei Moura
- Laboratory of Natural and Synthetics Products, University of Caxias do Sul, Caxias do Sul, Brazil
| |
Collapse
|
3
|
Zambrano CA, Escobar D, Ramos-Santiago T, Bollinger I, Stitzel J. Serine residues in the α4 nicotinic acetylcholine receptor subunit regulate surface α4β2 * receptor expression and clustering. Biochem Pharmacol 2018; 159:64-73. [PMID: 30414940 DOI: 10.1016/j.bcp.2018.11.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 11/07/2018] [Indexed: 11/18/2022]
Abstract
BACKGROUND AND PURPOSE Chronic nicotine exposure upregulates α4β2* nicotinic acetylcholine receptors (nAChRs) in the brain. The goal of this study was to examine the role of three serine residues in the large cytoplasmic loop of the α4 subunit on α4β2* upregulation in neurons. EXPERIMENTAL APPROACH Serine residues S336, S470 and S530 in mouse α4 were mutated to alanine and then re-expressed in primary neurons from cortex, hippocampus and subcortex of α4 KO mice. Mutant and wild type α4 expressing neurons were treated with nicotine (0.1, 1 and 10 μM) and assessed for α4β2* upregulation. KEY RESULTS α4β2* nAChRs expressing S336A or S470A mutants were deficient at cell surface upregulation in both subcortex and hippocampal neurons. S530A α4β2* mutants exhibited aberrant surface upregulation in subcortical neurons. None of the mutants affected surface upregulation in cortical neurons or upregulation of total α4β2* binding sites in any region. Further, dense domains or clusters of α4β2* nAChRs were observed in the neuronal surface. The impact of nicotine exposure on the intensity, area, and density of these clusters was dependent upon individual mutations. CONCLUSIONS AND IMPLICATIONS Effects of α4 nAChR mutants on surface upregulation varied among brain regions, suggesting that the cellular mechanism of α4β2* upregulation is complex and involves cellular identity. We also report for the first time that α4β2* nAChRs form clusters on the neuronal surface and that nicotine treatment alters the characteristics of the clusters in an α4 mutant-dependent manner. This finding adds a previously unknown layer of complexity to the effects of nicotine on α4β2* expression and function.
Collapse
Affiliation(s)
| | - Daniela Escobar
- Institute for Behavioral Genetics, University of Colorado Boulder, USA
| | - Tania Ramos-Santiago
- Institute for Behavioral Genetics, University of Colorado Boulder, USA; University of Puerto Rico, Rio Piedras
| | - Ian Bollinger
- Institute for Behavioral Genetics, University of Colorado Boulder, USA
| | - Jerry Stitzel
- Institute for Behavioral Genetics, University of Colorado Boulder, USA; Department of Integrative Physiology, University of Colorado Boulder, USA
| |
Collapse
|
4
|
Mammalian Susceptibility to a Neonicotinoid Insecticide after Fetal and Early Postnatal Exposure. Sci Rep 2018; 8:16639. [PMID: 30413779 PMCID: PMC6226530 DOI: 10.1038/s41598-018-35129-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 10/29/2018] [Indexed: 12/05/2022] Open
Abstract
Neonicotinoids have become the most widely used class of insecticides world-wide. Although numerous studies have documented neonicotinoid toxicity in bees and other insects, the effects of exposure during early development in mammals remain largely unexplored. We assessed the effects of the neonicotinoid imidacloprid (IMI) in adult male and female mice after in utero and early postnatal exposure. Pregnant mice were infused with IMI (0.5 mg/kg/day) from gestational day 4 to the end of nursing at postnatal day 21. The young adult offspring were studied in a series of biochemical and behavioral tests. To assess reproducibility, the behavioral analyses were conducted in three separate studies using multiple exposed litters. Exposure to IMI reduced fecundity, and in adult offspring, decreased body weight in male but not female pups. Offspring from IMI-treated mothers displayed lower triglycerides, elevated motor activity, enhanced social dominance, reduced depressive-like behavior, and a diminution in social aggression compared to vehicle treated controls. Low levels of IMI were detected in the brains and livers of the treated mothers, while trace levels were detected in some offspring. Our results demonstrate that transient exposure to a neonicotinoid over the early developmental period induces long-lasting changes in behavior and brain function in mice.
Collapse
|
5
|
Le Foll B, Chefer SI, Kimes AS, Stein EA, Goldberg SR, Mukhin AG. Impact of short access nicotine self-administration on expression of α4β2* nicotinic acetylcholine receptors in non-human primates. Psychopharmacology (Berl) 2016; 233:1829-35. [PMID: 26911381 PMCID: PMC4846528 DOI: 10.1007/s00213-016-4250-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 02/16/2016] [Indexed: 10/22/2022]
Abstract
RATIONALE Although nicotine exposure upregulates the α4β2* subtype of nicotinic acetylcholine receptors (nAChRs), the upregulation of nAChRs in non-human primates voluntarily self-administering nicotine has never been demonstrated. OBJECTIVES The objective of the study is to determine if short access to nicotine in a non-human primate model of nicotine self-administration is sufficient to induce nAChRs upregulation. METHODS We combined a nicotine self-administration paradigm with in vivo measure of α4β2* nAChRs using 2-[(18)F]fluoro-A-85380 (2-FA) and positron emission tomography (PET) in six squirrel monkeys. PET measurement was performed before and after intravenous nicotine self-administration (unit dose 10 μg/kg per injection). Monkeys were trained to self-administer nicotine under a fixed-ratio (FR) schedule of reinforcement. Intermittent access (1 h daily per weekday) to nicotine was allowed for 4 weeks and levels of α4β2* nAChRs were measured 4 days later. RESULTS This intermittent access was sufficient to induce upregulation of α4β2* receptors in the whole brain (31 % upregulation) and in specific brain areas (+36 % in amygdala and +62 % in putamen). CONCLUSIONS These results indicate that intermittent nicotine exposure is sufficient to produce change in nAChRs expression.
Collapse
Affiliation(s)
- Bernard Le Foll
- Translational Addiction Research Laboratory, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), 33 Russell Street, Toronto, ON, Canada, M5S 2S1. .,Departments of Family and Community Medicine, Pharmacology, Psychiatry, Institute of Medical Sciences, University of Toronto, Toronto, Canada. .,Ambulatory Care and Structured Treatment Program, Centre for Addiction and Mental Health, Toronto, Canada. .,Preclinical Pharmacology Section, Intramural Research Program, National Institute on Drug Abuse, NIH, DHHS, Baltimore, MD, 21224, USA.
| | - Svetlana I. Chefer
- Neuroimaging Research Branch, Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224,The Integrated Research Facility, Division of Clinical Research, National Institute of Allergy and Infectious Disease, NIH, Fort. Detrick, Frederick, MD, 21702
| | - Alane S. Kimes
- Neuroimaging Research Branch, Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224,Office of the Clinical Director (retired), Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224
| | - Elliot A. Stein
- Neuroimaging Research Branch, Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224
| | - Steven R. Goldberg
- Preclinical Pharmacology Section, Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224
| | - Alexey G. Mukhin
- Neuroimaging Research Branch, Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224,Department Psychiatry and Behavioral Sciences and Center for Smoking Cessation, Duke University Medical Center, 2424 Erwin Road, Suite 201, Durham, NC 27705
| |
Collapse
|
6
|
HIF-1α Plays a Critical Role in the Gestational Sidestream Smoke-Induced Bronchopulmonary Dysplasia in Mice. PLoS One 2015; 10:e0137757. [PMID: 26361040 PMCID: PMC4567349 DOI: 10.1371/journal.pone.0137757] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 08/20/2015] [Indexed: 11/24/2022] Open
Abstract
Rationale Smoking during pregnancy increases the risk of bronchopulmonary dysplasia (BPD) and, in mice, gestational exposure to sidestream cigarette smoke (SS) induces BPD-like condition characterized by alveolar simplification, impaired angiogenesis, and suppressed surfactant protein production. Normal fetal development occurs in a hypoxic environment and nicotinic acetylcholine receptors (nAChRs) regulate the hypoxia-inducible factor (HIF)-1α that controls apoptosis and angiogenesis. To understand SS-induced BPD, we hypothesized that gestational SS affected alveolar development through HIF-1α. Methods Pregnant BALB/c mice were exposed to air (control) or SS throughout the gestational period and the 7-day-old lungs of the progeny were examined. Results Gestational SS increased apoptosis of alveolar and airway epithelial cells. This response was associated with increased alveolar volumes, higher levels of proapoptotic factors (FOXO3a, HIPK2, p53, BIM, BIK, and BAX) and the antiangiogenic factor (GAX), and lower levels of antiapoptotic factors (Akt-PI3K, NF-κB, HIF-1α, and Bcl-2) in the lung. Although gestational SS increased the cells containing the proangiogenic bombesin-like-peptide, it markedly decreased the expression of its receptor GRPR in the lung. The effects of SS on apoptosis were attenuated by the nAChR antagonist mecamylamine. Conclusions Gestational SS-induced BPD is potentially regulated by nAChRs and associated with downregulation of HIF-1α, increased apoptosis of epithelial cells, and increased alveolar volumes. Thus, in mice, exposure to sidestream tobacco smoke during pregnancy promotes BPD-like condition that is potentially mediated through the nAChR/HIF-1α pathway.
Collapse
|
7
|
Jaikhan P, Boonyarat C, Arunrungvichian K, Taylor P, Vajragupta O. Design and Synthesis of Nicotinic Acetylcholine Receptor Antagonists and their Effect on Cognitive Impairment. Chem Biol Drug Des 2015; 87:39-56. [DOI: 10.1111/cbdd.12627] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 07/03/2015] [Accepted: 07/15/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Pattaporn Jaikhan
- Center of Excellence for Innovation in Drug Design and Discovery; Faculty of Pharmacy; Mahidol University; 447 Sri-Ayudya Road Bangkok 10400 Thailand
| | - Chantana Boonyarat
- Department of Pharmaceutical Chemistry; Faculty of Pharmaceutical Science; KhonKaen University; KhonKaen 4000 Thailand
| | - Kuntarat Arunrungvichian
- Center of Excellence for Innovation in Drug Design and Discovery; Faculty of Pharmacy; Mahidol University; 447 Sri-Ayudya Road Bangkok 10400 Thailand
- Department of Pharmacology; Skaggs School of Pharmacy and Pharmaceutical Sciences; University of California; San Diego 9500 Gilman Drive La Jolla CA 92093-0657 USA
| | - Palmer Taylor
- Department of Pharmacology; Skaggs School of Pharmacy and Pharmaceutical Sciences; University of California; San Diego 9500 Gilman Drive La Jolla CA 92093-0657 USA
| | - Opa Vajragupta
- Center of Excellence for Innovation in Drug Design and Discovery; Faculty of Pharmacy; Mahidol University; 447 Sri-Ayudya Road Bangkok 10400 Thailand
| |
Collapse
|