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Salim C, Batsaikhan E, Kan AK, Chen H, Jee C. Nicotine Motivated Behavior in C. elegans. Int J Mol Sci 2024; 25:1634. [PMID: 38338915 PMCID: PMC10855306 DOI: 10.3390/ijms25031634] [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: 01/04/2024] [Revised: 01/20/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024] Open
Abstract
To maximize the advantages offered by Caenorhabditis elegans as a high-throughput (HTP) model for nicotine dependence studies, utilizing its well-defined neuroconnectome as a robust platform, and to unravel the genetic basis of nicotine-motivated behaviors, we established the nicotine conditioned cue preference (CCP) paradigm. Nicotine CCP enables the assessment of nicotine preference and seeking, revealing a parallel to fundamental aspects of nicotine-dependent behaviors observed in mammals. We demonstrated that nicotine-elicited cue preference in worms is mediated by nicotinic acetylcholine receptors and requires dopamine for CCP development. Subsequently, we pinpointed nAChR subunits associated with nicotine preference and validated human GWAS candidates linked to nicotine dependence involved in nAChRs. Functional validation involves assessing the loss-of-function strain of the CACNA2D3 ortholog and the knock-out (KO) strain of the CACNA2D2 ortholog, closely related to CACNA2D3 and sharing human smoking phenotypes. Our orthogonal approach substantiates the functional conservation of the α2δ subunit of the calcium channel in nicotine-motivated behavior. Nicotine CCP in C. elegans serves as a potent affirmation of the cross-species functional relevance of GWAS candidate genes involved in nicotine seeking associated with tobacco abuse, providing a streamlined yet comprehensive system for investigating intricate behavioral paradigms within a simplified and reliable framework.
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Affiliation(s)
| | | | | | | | - Changhoon Jee
- Department of Pharmacology, Addiction Science and Toxicology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA; (C.S.)
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Kaikai NE, Ba-M'hamed S, Ghanima A, Bennis M. Exposure to metam sodium-based pesticide impaired cognitive performances in adult mice: Involvement of oxidative damage and glial activation. Toxicol Appl Pharmacol 2023; 477:116677. [PMID: 37678439 DOI: 10.1016/j.taap.2023.116677] [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: 05/27/2023] [Revised: 07/28/2023] [Accepted: 09/04/2023] [Indexed: 09/09/2023]
Abstract
Cognitive integrity is a critical aspect of neurological function, and a decline in cognitive function is a hallmark of neurotoxicity. Oxidative stress is a significant pathological feature contributing to cognitive deficits that can arise from exposure to environmental pollutants such as pesticides. Among these, Metam sodium-based pesticides (MS-BP) are an emergent type of pesticide widely used in the agriculture and public health sectors for controlling pests and diseases. Our prior research has shown that animals exposed to MS-BP during the early stages of brain development caused cognitive impairments. In the present study, we tested whether exposure to this compound in a fully matured brain would affect cognitive performance and induce oxidative damage to the central nervous system. In this context, adult mice received chronic treatment with increasing doses of MS-BP and subjected to a set of behavioral paradigms. Following behavioral assessment, oxidative stress and glial activation were evaluated. Our main findings showed that MS-BP chronic exposure impaired recognition and short- and long-term memory. These alterations were accompanied by increased superoxide dismutase activity and malondialdehyde level and a marked decrease in catalase activity in specific brain areas. Moreover, exposure to MS-BP is associated with a significant rise in the density of astrocytic and microglial markers, indicating a possible glial cell response within the prefrontal cortex and hippocampus. The present work demonstrated that MS-BP altered cognitive performance likely through oxidative damage to the brain.
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Affiliation(s)
- Nour-Eddine Kaikai
- Laboratory of Pharmacology, Neurobiology, Anthropology, and Environment, Cadi Ayyad University, Faculty of Sciences, Marrakech, Morocco; Department of Biology, Higher Normal School, Cadi Ayyad University, 4000 Marrakech, Morocco
| | - Saadia Ba-M'hamed
- Laboratory of Pharmacology, Neurobiology, Anthropology, and Environment, Cadi Ayyad University, Faculty of Sciences, Marrakech, Morocco
| | - Abderrazzak Ghanima
- Research Laboratory for Sustainable Development and Health, Cadi Ayyad University, Faculty of Sciences and Techniques, Marrakech, Morocco
| | - Mohamed Bennis
- Laboratory of Pharmacology, Neurobiology, Anthropology, and Environment, Cadi Ayyad University, Faculty of Sciences, Marrakech, Morocco.
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Nicotine's effect on cognition, a friend or foe? Prog Neuropsychopharmacol Biol Psychiatry 2023; 124:110723. [PMID: 36736944 DOI: 10.1016/j.pnpbp.2023.110723] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/27/2023] [Accepted: 01/29/2023] [Indexed: 02/04/2023]
Abstract
Tobacco smoking is a preventable cause of morbidity and mortality throughout the world. Smoking comes in form of absorption of many compounds, among which nicotine is the main psychoactive component of tobacco and its positive and negative reinforcement effects are proposed to be the key mechanism for the initiation and maintenance of smoking. Growing evidence suggests that the cognitive enhancement effects of nicotine may also contribute to the difficulty of quitting smoking, especially in individuals with psychiatric disorders. In this review, we first introduce the beneficial effect of nicotine on cognition including attention, short-term memory and long-term memory. We next summarize the beneficial effect of nicotine on cognition under pathological conditions, including Alzheimer's disease, Parkinson's disease, Schizophrenia, Stress-induced Anxiety, Depression, and drug-induced memory impairment. The possible mechanism underlying nicotine's effect is also explored. Finally, nicotine's detrimental effect on cognition is discussed, including in the prenatal and adolescent periods, and high-dose nicotine- and withdrawal-induced memory impairment is emphasized. Therefore, nicotine serves as both a friend and foe. Nicotine-derived compounds could be a promising strategy to alleviate neurological disease-associated cognitive deficit, however, due to nicotine's detrimental effect, continued educational programs and public awareness campaigns are needed to reduce tobacco use among pregnant women and smoking should be quitted even if it is e-cigarette, especially for the adolescents.
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Kaikai NE, Ba-M'hamed S, Ghanima A, Bennis M. Metam sodium exposure during pregnancy and lactation in mice caused behavioral abnormalities and oxidative stress in offspring. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2021; 85:103630. [PMID: 33711515 DOI: 10.1016/j.etap.2021.103630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 03/03/2021] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
Metam sodium (MS) is a widespread biocide with a broad-spectrum activity. Here, we addressed the behavioral impact of MS by exposing female mice to 50, 100 and 150 mg/kg of MS during both pregnancy and lactation, and evaluated the oxidative stress as a potential mechanism of MS-induced neurotoxicity. The results showed that MS affected fertility and reproduction parameters as well as some aspects of maternal behavior, especially at high doses. In offspring, MS caused a significant delay in the ontogeny of sensorimotor functions. In addition, treated mice exhibited during adulthood an increase of anxiety-like, depression-like behaviors as well as learning and memory impairment. These alterations were accompanied by an increase of the superoxide dismutase activity, and a significant decreased catalase and malondialdehyde activities in specific brain areas. The present work revealed that early exposure to MS induced sensorimotor and behavioral impairments in offspring likely associated with onset of oxidative stress.
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Affiliation(s)
- Nour-Eddine Kaikai
- Laboratory of Pharmacology, Neurobiology, Anthropology and Environment, Cadi Ayyad University, Faculty of Sciences, Marrakech, Morocco; Research Laboratory for Sustainable Development and Health, Cadi Ayyad University, Faculty of Sciences and Techniques, Marrakech, Morocco
| | - Saadia Ba-M'hamed
- Laboratory of Pharmacology, Neurobiology, Anthropology and Environment, Cadi Ayyad University, Faculty of Sciences, Marrakech, Morocco
| | - Abderrazzak Ghanima
- Research Laboratory for Sustainable Development and Health, Cadi Ayyad University, Faculty of Sciences and Techniques, Marrakech, Morocco.
| | - Mohamed Bennis
- Laboratory of Pharmacology, Neurobiology, Anthropology and Environment, Cadi Ayyad University, Faculty of Sciences, Marrakech, Morocco
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Sadigh-Eteghad S, Vatandoust SM, Mahmoudi J, Rahigh Aghsan S, Majdi A. Cotinine ameliorates memory and learning impairment in senescent mice. Brain Res Bull 2020; 164:65-74. [PMID: 32818583 DOI: 10.1016/j.brainresbull.2020.08.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 07/29/2020] [Accepted: 08/10/2020] [Indexed: 10/23/2022]
Abstract
This study aimed to assess the effects of cotinine on age-induced memory and learning impairment and related downstream pathways in mice. Thirty aged (18-month old) and 10 young mice (8-week old) were randomly divided into 4 groups (n = 10 each) and subjected to cotinine at 5 mg/kg dose and/or methyllycaconitine (MLA) at 1 mg/kg, i.p. dose (α7 nAChRs antagonist) for 4 weeks. Morris water maze (MWM) and novel object recognition (NOR) tasks were used to assess spatial and recognition learning and memories of the mice, respectively. Levels of oxidative stress, apoptosis, neuroinflammation, and structural synaptic plasticity, and also neurotrophic factors and α7 nAChRs were assessed in the hippocampus using either ELISA or Western blotting. Aging was associated with learning and memory disabilities and dysregulation of the assessed pathways in the hippocampus of mice. Chronic cotinine treatment improved learning and memory in aged animals, indicated by decreased latency time, and increased time spent in the target quadrant and discrimination index (DI) in the MWM and NOR tasks. Also, chronic cotinine injection increased total antioxidant capacity (TAC), SOD and GSH-px activity, PSD-95, GAP-43, SYN, brain-derived neurotrophic factor, and neural growth factor levels and decreased malondialdehyde, TNF-α, and IL-1β in the hippocampus of aged mice. Conversely, MLA treatment reversed most of the mentioned effects via the blockade of α7 nAChRs. Cotinine improves age-induced memory and learning impairment via its modulatory effects on α7 nAChRs and subsequent activation/deactivation of the mentioned pathways in the hippocampus of aged mice.
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Affiliation(s)
- Saeed Sadigh-Eteghad
- Neurosciences Research Center (NSRC), Tabriz University of Medical Sciences, Tabriz, Iran
| | - Seyed Mehdi Vatandoust
- Neurosciences Research Center (NSRC), Tabriz University of Medical Sciences, Tabriz, Iran
| | - Javad Mahmoudi
- Neurosciences Research Center (NSRC), Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sepideh Rahigh Aghsan
- Department of Clinical Pharmacy, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Majdi
- Neurosciences Research Center (NSRC), Tabriz University of Medical Sciences, Tabriz, Iran.
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Yadegary A, Nazari-Serenjeh F, Darbandi N. Synergistic improvement effect of nicotine-ghrelin co-injection into the anterior ventral tegmental area on morphine-induced amnesia. Neuropeptides 2020; 80:102025. [PMID: 32029269 DOI: 10.1016/j.npep.2020.102025] [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: 06/06/2019] [Revised: 01/15/2020] [Accepted: 01/29/2020] [Indexed: 11/15/2022]
Abstract
In the present study the effect of ghrelin or ghrelin/nicotine injection into the anterior ventral tegmental area (aVTA) on morphine-induced amnesia in passive avoidance learning have been evaluated. Also, the role of the aVTA nicotinic receptors in possible ghrelin-induced effects has been investigated. All animals were bilaterally implanted with chronic cannulas in the aVTA. A step-through type passive avoidance task was used for measurement of memory. We found that post-training subcutaneous (s.c.) injection of morphine (0.5-7.5 mg/kg) dose-dependently reduced the step-through latency, indicating morphine-induced amnesia. Post-training bilateral infusion of ghrelin (0.3, 1.5 and 3 nmol/μl) in a dose-dependent manner reversed amnesia induced by morphine (7.5 mg/kg, s.c.). Furthermore, reversal effect of ghrelin (3 nmol/μl) was blocked by pre-treatment of intra-aVTA administration of mecamylamine (1-3 μg/rat), a nicotinic acetylcholine receptor antagonist. Intra-aVTA administration of the higher dose of mecamylamine (3 μg/rat) into the aVTA by itself decreased the step-through latency and induced amnesia. In addition, post-training intra-aVTA administration of nicotine (0.25, 0.5, 1 μg/rat) which alone cannot affect memory consolidation, decreased significantly the amnesia induced by morphine (7.5 mg/kg, s.c.). Co-treatment of an ineffective dose of ghrelin (0.3 nmol/μl) with an ineffective dose of nicotine (0.25 μg/rat) significantly increased step-through latency of morphine (7.5 mg/kg, s.c.) treated animals, indicating the synergistic effect of the drugs. Taken together, our results suggest that intra-aVTA administration of ghrelin reversed morphine-induced amnesia and that ghrelin interacts synergistically with nicotine to mitigate morphine-induced amnesia.
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Affiliation(s)
- Atena Yadegary
- Department of Biology, Faculty of Science, Arak University, Arak, Iran
| | | | - Niloufar Darbandi
- Department of Biology, Faculty of Science, Arak University, Arak, Iran
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Wei C, Fan J, Sun X, Yao J, Guo Y, Zhou B, Shang Y. Acetyl-11-keto-β-boswellic acid ameliorates cognitive deficits and reduces amyloid-β levels in APPswe/PS1dE9 mice through antioxidant and anti-inflammatory pathways. Free Radic Biol Med 2020; 150:96-108. [PMID: 32109514 DOI: 10.1016/j.freeradbiomed.2020.02.022] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 02/16/2020] [Accepted: 02/20/2020] [Indexed: 02/07/2023]
Abstract
Alzheimer's disease (AD) is a complex disease involved oxidative stress and inflammation in its pathogenesis. Acetyl-11-keto-β-boswellic acid (AKBA) is an active triterpenoid compound from extracts of Boswellia serrata, which has been widely used as an antioxidant and anti-inflammatory agent. The present study was to determine whether AKBA, a novel candidate, could protect against cognitive and neuropathological impairments in AD. We found that AKBA treatment resulted in a significant improvement of learning and memory deficits, a dramatic decrease in cerebral amyloid-β (Aβ) levels and plaque burden, a profound alleviation in oxidative stress and inflammation, and a marked reduction in activated glial cells and synaptic defects in the APPswe/PS1dE9 mice. Furthermore, amyloid precursor protein (APP) processing was remarkably suppressed with AKBA treatment by inhibiting beta-site APP cleaving enzyme 1 (BACE1) protein expression to produce Aβ in the APPswe/PS1dE9 mice brains. Mechanistically, AKBA modulated antioxidant and anti-inflammatory pathways via increasing nuclear erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) expression, and via declining phosphorylation of inhibitor of nuclear factor-kappa B alpha (IκBα) and p65. Collectively, our findings provide evidence that AKBA protects neurons against oxidative stress and inflammation in AD, and this neuroprotective effect involves the Nrf2/HO-1 and nuclear factor-kappa B (NF-κB) signaling pathways.
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Affiliation(s)
- Chao Wei
- Department of Neurology, The Second Medical Center, Chinese PLA General Hospital, Beijing, 100853, China.
| | - Jiao Fan
- Institute of Geriatrics, National Clinical Research Center of Geriatrics Disease, Chinese PLA General Hospital, Beijing, 100853, China
| | - Xuan Sun
- Department of Neurology, The Second Medical Center, Chinese PLA General Hospital, Beijing, 100853, China
| | - Jiarui Yao
- Department of Neurology, The Second Medical Center, Chinese PLA General Hospital, Beijing, 100853, China
| | - Yane Guo
- Department of Neurology, The Second Medical Center, Chinese PLA General Hospital, Beijing, 100853, China
| | - Bo Zhou
- Department of Neurology, The Second Medical Center, Chinese PLA General Hospital, Beijing, 100853, China
| | - Yanchang Shang
- Department of Neurology, The Second Medical Center, Chinese PLA General Hospital, Beijing, 100853, China
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Kaikai NE, Ba-M'hamed S, Bennis M, Ghanima A. Prenatal exposure to the pesticide metam sodium induces sensorimotor and neurobehavioral abnormalities in mice offspring. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2020; 74:103309. [PMID: 31835201 DOI: 10.1016/j.etap.2019.103309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 11/22/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Abstract
The present study has investigated developmental neurotoxicity of Metam sodium (MS), from gestational day 6 and throughout the gestation period until delivery. Therefore, mated female mice were orally exposed on a daily basis to 0 (control), 50, 100 or 150 mg of MS/kg of body weight and their standard fertility and reproductive parameters were assessed. The offspring were examined for their sensorimotor development, depression and cognitive performance. Our results showed that MS exposure during pregnancy led to one case of mortality, two cases of abortion and disturbed fertility and reproductive parameters in pregnant dams. In offspring, MS induced an overall delay in innate reflexes and sensorimotor performances. Furthermore, all prenatally treated animals showed an increased level of depression-like behavior as well as a pronounced cognitive impairment in adulthood. These results demonstrated that prenatal exposure to MS causes a long-lasting developmental neurotoxicity and alters a wide range of behavioral functions in mice.
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Affiliation(s)
- Nour-Eddine Kaikai
- Laboratory of Pharmacology, Neurobiology and Behavior (URAC-37), Cadi Ayyad University, Marrakech, Morocco; Laboratory of Bioorganic and Macromolecular Chemistry. Cadi Ayyad University, Faculty of Sciences and Techniques, Marrakech, Morocco
| | - Saadia Ba-M'hamed
- Laboratory of Pharmacology, Neurobiology and Behavior (URAC-37), Cadi Ayyad University, Marrakech, Morocco
| | - Mohamed Bennis
- Laboratory of Pharmacology, Neurobiology and Behavior (URAC-37), Cadi Ayyad University, Marrakech, Morocco
| | - Abderrazzak Ghanima
- Laboratory of Bioorganic and Macromolecular Chemistry. Cadi Ayyad University, Faculty of Sciences and Techniques, Marrakech, Morocco.
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Activation of PPARγ Attenuates the Expression of Physical and Affective Nicotine Withdrawal Symptoms through Mechanisms Involving Amygdala and Hippocampus Neurotransmission. J Neurosci 2019; 39:9864-9875. [PMID: 31685649 DOI: 10.1523/jneurosci.1922-19.2019] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 09/18/2019] [Indexed: 12/31/2022] Open
Abstract
An isoform of peroxisome proliferator-activated receptors (PPARs), PPARγ, is the receptor for the thiazolidinedione class of anti-diabetic medications including pioglitazone. Neuroanatomical data indicate PPARγ localization in brain areas involved in drug addiction. Preclinical and clinical data have shown that pioglitazone reduces alcohol and opioid self-administration, relapse to drug seeking, and plays a role in emotional responses. Here, we investigated the behavioral effect of PPARγ manipulation on nicotine withdrawal in male Wistar rats and in male mice with neuron-specific PPARγ deletion (PPARγ(-/-)) and their littermate wild-type (PPARγ(+/+)) controls. Real-time quantitative RT-PCR and RNAscope in situ hybridization assays were used for assessing the levels of expression and cell-type localization of PPARγ during nicotine withdrawal. Brain site-specific microinjections of the PPARγ agonist pioglitazone were performed to explore the role of this system on nicotine withdrawal at a neurocircuitry level. Results showed that activation of PPARγ by pioglitazone abolished the expression of somatic and affective nicotine withdrawal signs in rats and in (PPARγ(+/+)) mice. This effect was blocked by the PPARγ antagonist GW9662. During early withdrawal and protracted abstinence, the expression of PPARγ increased in GABAergic and glutamatergic cells of the amygdala and hippocampus, respectively. Hippocampal microinjections of pioglitazone reduced the expression of the physical signs of withdrawal, whereas excessive anxiety associated with protracted abstinence was prevented by pioglitazone microinjection into the amygdala. Our results demonstrate the implication of the neuronal PPARγ in nicotine withdrawal and indicates that activation of PPARγ may offer an interesting strategy for smoking cessation.SIGNIFICANCE STATEMENT Smoking cessation leads the occurrence of physical and affective withdrawal symptoms representing a major burden to quit tobacco use. Here, we show that activation of PPARγ prevents the expression of both somatic and affective signs of nicotine withdrawal. At molecular levels results show that PPARγ expression increases in GABAergic cells in the hippocampus and in GABA- and glutamate-positive cells in the basolateral amygdala. Hippocampal microinjections of pioglitazone reduce the insurgence of the physical withdrawal signs, whereas anxiety linked to protracted abstinence is attenuated by pioglitazone injected into the amygdala. Our results demonstrate the implication of neuronal PPARγ in nicotine withdrawal and suggest that PPARγ agonism may represent a promising treatment to aid smoking cessation.
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Mohammadi S, Oryan S, Komaki A, Eidi A, Zarei M. Effects of Hippocampal Microinjection of Irisin, an Exercise-Induced Myokine, on Spatial and Passive Avoidance Learning and Memory in Male Rats. Int J Pept Res Ther 2019. [DOI: 10.1007/s10989-019-09842-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Michalak A, Pekala K, Budzynska B, Kruk-Slomka M, Biala G. The role of verapamil and SL-327 in morphine- and ethanol-induced state-dependent and cross state-dependent memory. Eur J Pharmacol 2018; 834:318-326. [DOI: 10.1016/j.ejphar.2018.07.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 07/20/2018] [Accepted: 07/26/2018] [Indexed: 11/24/2022]
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Jurek B, Neumann ID. The Oxytocin Receptor: From Intracellular Signaling to Behavior. Physiol Rev 2018; 98:1805-1908. [DOI: 10.1152/physrev.00031.2017] [Citation(s) in RCA: 408] [Impact Index Per Article: 68.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The many facets of the oxytocin (OXT) system of the brain and periphery elicited nearly 25,000 publications since 1930 (see FIGURE 1 , as listed in PubMed), which revealed central roles for OXT and its receptor (OXTR) in reproduction, and social and emotional behaviors in animal and human studies focusing on mental and physical health and disease. In this review, we discuss the mechanisms of OXT expression and release, expression and binding of the OXTR in brain and periphery, OXTR-coupled signaling cascades, and their involvement in behavioral outcomes to assemble a comprehensive picture of the central and peripheral OXT system. Traditionally known for its role in milk let-down and uterine contraction during labor, OXT also has implications in physiological, and also behavioral, aspects of reproduction, such as sexual and maternal behaviors and pair bonding, but also anxiety, trust, sociability, food intake, or even drug abuse. The many facets of OXT are, on a molecular basis, brought about by a single receptor. The OXTR, a 7-transmembrane G protein-coupled receptor capable of binding to either Gαior Gαqproteins, activates a set of signaling cascades, such as the MAPK, PKC, PLC, or CaMK pathways, which converge on transcription factors like CREB or MEF-2. The cellular response to OXT includes regulation of neurite outgrowth, cellular viability, and increased survival. OXTergic projections in the brain represent anxiety and stress-regulating circuits connecting the paraventricular nucleus of the hypothalamus, amygdala, bed nucleus of the stria terminalis, or the medial prefrontal cortex. Which OXT-induced patterns finally alter the behavior of an animal or a human being is still poorly understood, and studying those OXTR-coupled signaling cascades is one initial step toward a better understanding of the molecular background of those behavioral effects.
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Affiliation(s)
- Benjamin Jurek
- Department of Behavioural and Molecular Neurobiology, Institute of Zoology, University of Regensburg, Regensburg, Germany
| | - Inga D. Neumann
- Department of Behavioural and Molecular Neurobiology, Institute of Zoology, University of Regensburg, Regensburg, Germany
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Lu C, Wang Y, Lv J, Jiang N, Fan B, Qu L, Li Y, Chen S, Wang F, Liu X. Ginsenoside Rh2 reverses sleep deprivation-induced cognitive deficit in mice. Behav Brain Res 2018; 349:109-115. [PMID: 29544964 DOI: 10.1016/j.bbr.2018.03.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/01/2018] [Accepted: 03/02/2018] [Indexed: 12/29/2022]
Abstract
Sleep deprivation (SD) negatively caused cognitive deficit, which was associated with oxidative stress induced damage. Ginsenoside Rh2 had the ability to protect against damage caused by reactive oxygen species in vitro, showing antioxidant property. Therefore, it was hypothesized that Ginsenoside Rh2 could prevent SD-induced cognitive deficit via its antioxidant properties. In this study, the effect of Ginsenoside Rh2 on memory impairment induced by sleep deprivation was investigated. The mice were sleep deprived continuously for 14 days using our self-made Sleep Interruption Apparatus (SIA). Ginsenoside Rh2 was administered intraperitoneally at two doses (20 and 40 μmol/kg) for 20 days. Thereafter, behavioral studies were conducted to test the learning and memory ability using object location recognition (OLR) experiment and passive avoidance (PA) test. Additionally, the oxidative stress parameters in the serum and the brain tissues (cortex and hippocampus) were assessed, including the superoxide dismutase (SOD) enzyme activity, the total antioxidant reactivity (TAR), the malondialdehyde (MDA) level, the glutathione (GSH) level, and the lipid peroxidation (LPO) content. The results revealed that SD impaired both spatial and non-spatial memory (P < 0.05). Treatment with Ginsenoside Rh2 at both doses prevented memory impairment induced by SD. Moreover, Ginsenoside Rh2 normalized the reduction of SOD and TAR activities in the serum (P < 0.01) and the decrease of GSH content in both the cortex and hippocampus (P < 0.05) induced by SD. Furthermore, Ginsenoside Rh2 significantly decreased the MDA level in the serum (P < 0.05) and the LPO content in both the cortex and hippocampus (P < 0.05) compared to SD group. In conclusion, sleep deprivation impaired both spatial and non-spatial memory and Ginsenoside Rh2 reversed this impairment, probably by preventing the oxidative stress damage in the body, including the serum and brain during sleep deprivation.
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Affiliation(s)
- Cong Lu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Yan Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China
| | - Jingwei Lv
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Ning Jiang
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Bei Fan
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China
| | - Lina Qu
- National Laboratory of Human Factors Engineering, The State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing 100094, China
| | - Yinghui Li
- National Laboratory of Human Factors Engineering, The State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing 100094, China
| | - Shanguang Chen
- National Laboratory of Human Factors Engineering, The State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing 100094, China
| | - Fengzhong Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China.
| | - Xinmin Liu
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
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Lu C, Lv J, Dong L, Jiang N, Wang Y, Wang Q, Li Y, Chen S, Fan B, Wang F, Liu X. Neuroprotective effects of 20(S)-protopanaxatriol (PPT) on scopolamine-induced cognitive deficits in mice. Phytother Res 2018; 32:1056-1063. [DOI: 10.1002/ptr.6044] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 01/05/2018] [Accepted: 01/10/2018] [Indexed: 01/16/2023]
Affiliation(s)
- Cong Lu
- Research Center for Pharmacology and Toxicology; Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences (CAMS), and Peking Union Medical College (PUMC); Beijing 100193 China
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS); Beijing 100193 China
| | - Jingwei Lv
- Research Center for Pharmacology and Toxicology; Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences (CAMS), and Peking Union Medical College (PUMC); Beijing 100193 China
| | - Liming Dong
- Research Center for Pharmacology and Toxicology; Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences (CAMS), and Peking Union Medical College (PUMC); Beijing 100193 China
| | - Ning Jiang
- Research Center for Pharmacology and Toxicology; Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences (CAMS), and Peking Union Medical College (PUMC); Beijing 100193 China
| | - Yan Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS); Beijing 100193 China
| | - Qiong Wang
- Affiliated TCM Hospital/School of Pharmacy/Sino-Portugal TCM International Cooperation Center; Southwest Medical University; Luzhou 646000 China
| | - Yinghui Li
- National Laboratory of Human Factors Engineering/The State Key Laboratory of Space Medicine Fundamentals and Application; China Astronaut Research and Training Center; Beijing 100094 China
| | - Shanguang Chen
- National Laboratory of Human Factors Engineering/The State Key Laboratory of Space Medicine Fundamentals and Application; China Astronaut Research and Training Center; Beijing 100094 China
| | - Bei Fan
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS); Beijing 100193 China
| | - Fengzhong Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS); Beijing 100193 China
| | - Xinmin Liu
- Research Center for Pharmacology and Toxicology; Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences (CAMS), and Peking Union Medical College (PUMC); Beijing 100193 China
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15
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Giménez De Béjar V, Caballero Bleda M, Popović N, Popović M. Verapamil Blocks Scopolamine Enhancement Effect on Memory Consolidation in Passive Avoidance Task in Rats. Front Pharmacol 2017; 8:566. [PMID: 28878678 PMCID: PMC5572412 DOI: 10.3389/fphar.2017.00566] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 08/09/2017] [Indexed: 12/20/2022] Open
Abstract
Our recent data have indicated that scopolamine, a non-selective muscarinic receptor antagonist, improves memory consolidation, in a passive avoidance task, tested in rats. It has been found that verapamil, a phenylalkylamine class of the L-type voltage-dependent calcium channel antagonist, inhibits [3H] N-methyl scopolamine binding to M1 muscarinic receptors. However, there are no data about the effect of verapamil on memory consolidation in the passive avoidance task, in rats. The purpose of the present study was to examine the effects of verapamil (0.5, 1.0, 2.5, 5.0, 10, or 20 mg/kg i.p.) as well as the interaction between scopolamine and verapamil on memory consolidation in the step-through passive avoidance task, in Wistar rats. Our results showed that verapamil (1.0 and 2.5 mg/kg) administered immediately after the acquisition task significantly increased the latency of the passive avoidance response, on the 48 h retested trial, improving memory consolidation. On the other hand, verapamil in a dose of 5 mg/kg, that per se does not affect memory consolidation, significantly reversed the memory consolidation improvement induced by scopolamine (1 mg/kg, i.p., administered immediately after verapamil treatment) but did not change the passive avoidance response in rats treated by an ineffective dose of scopolamine (30 mg/kg). In conclusion, the present data suggest that (1) the post-training administration of verapamil, dose-dependently, improves the passive avoidance response; (2) verapamil, in ineffective dose, abolished the improvement of memory consolidation effect of scopolamine; and (3) exists interaction between cholinergic muscarinic receptors and calcium homeostasis-related mechanisms in the consolidation of emotional memory.
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Affiliation(s)
- Verónica Giménez De Béjar
- Department of Neurology, Hospital Quirónsalud MurciaMurcia, Spain.,Instituto Murciano de Investigación Biosanitaria Virgen de la ArrixacaMurcia, Spain
| | - María Caballero Bleda
- Instituto Murciano de Investigación Biosanitaria Virgen de la ArrixacaMurcia, Spain.,Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of MurciaMurcia, Spain
| | - Natalija Popović
- Instituto Murciano de Investigación Biosanitaria Virgen de la ArrixacaMurcia, Spain.,Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of MurciaMurcia, Spain
| | - Miroljub Popović
- Instituto Murciano de Investigación Biosanitaria Virgen de la ArrixacaMurcia, Spain.,Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of MurciaMurcia, Spain
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16
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Compound Schisandra-Ginseng-Notoginseng-Lycium Extract Ameliorates Scopolamine-Induced Learning and Memory Disorders in Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2017:8632016. [PMID: 28814961 PMCID: PMC5549506 DOI: 10.1155/2017/8632016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 05/05/2017] [Accepted: 06/07/2017] [Indexed: 12/14/2022]
Abstract
Schisandra, Ginseng, Notoginseng, and Lycium barbarum are traditional Chinese medicinal plants sharing cognitive-enhancing properties. To design a functional food to improve memory, we prepared a compound Schisandra-Ginseng-Notoginseng-Lycium (CSGNL) extract and investigated its effect on scopolamine-induced learning and memory loss in mice. To optimize the dose ratios of the four herbal extracts in CSGNL, orthogonal experiments were performed. Mice were administered CSGNL by gavage once a day for 30 days and then mouse learning and memory were evaluated by Morris water maze and step-through tests. The mechanisms of CSGNL improving learning and memory were investigated by assaying acetylcholine (ACh) levels and choline acetyltransferase (ChAT) and acetylcholinesterase (AChE) activities in the brain tissues of treated mice. The results showed that CSGNL significantly ameliorated scopolamine-induced learning and memory impairment, at least in part, by modulating ACh levels and ChAT and AChE activities in the mouse brain. Our data support the use of CSGNL as a functional food for learning and memory enhancement.
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