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Esaki H, Izumi S, Nishikawa K, Nagayasu K, Kaneko S, Nishitani N, Deyama S, Kaneda K. Role of medial prefrontal cortex voltage-dependent potassium 4.3 channels in nicotine-induced enhancement of object recognition memory in male mice. Eur J Pharmacol 2024; 978:176790. [PMID: 38942263 DOI: 10.1016/j.ejphar.2024.176790] [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: 06/05/2024] [Accepted: 06/26/2024] [Indexed: 06/30/2024]
Abstract
Nicotine has been shown to enhance object recognition memory in the novel object recognition (NOR) test by activating excitatory neurons in the medial prefrontal cortex (mPFC). However, the exact neuronal mechanisms underlying the nicotine-induced activation of mPFC neurons and the resultant memory enhancement remain poorly understood. To address this issue, we performed brain-slice electrophysiology and the NOR test in male C57BL/6J mice. Whole-cell patch-clamp recordings from layer V pyramidal neurons in the mPFC revealed that nicotine augments the summation of evoked excitatory postsynaptic potentials (eEPSPs) and that this effect was suppressed by N-[3,5-Bis(trifluoromethyl)phenyl]-N'-[2,4-dibromo-6-(2H-tetrazol-5-yl)phenyl]urea (NS5806), a voltage-dependent potassium (Kv) 4.3 channel activator. In line with these findings, intra-mPFC infusion of NS5806 suppressed systemically administered nicotine-induced memory enhancement in the NOR test. Additionally, miRNA-mediated knockdown of Kv4.3 channels in mPFC pyramidal neurons enhanced object recognition memory. Furthermore, inhibition of A-type Kv channels by intra-mPFC infusion of 4-aminopyridine was found to enhance object recognition memory, while this effect was abrogated by prior intra-mPFC NS5806 infusion. These results suggest that nicotine augments the summation of eEPSPs via the inhibition of Kv4.3 channels in mPFC layer V pyramidal neurons, resulting in the enhancement of object recognition memory.
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Affiliation(s)
- Hirohito Esaki
- Laboratory of Molecular Pharmacology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Shoma Izumi
- Laboratory of Molecular Pharmacology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Keisuke Nishikawa
- Laboratory of Molecular Pharmacology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Kazuki Nagayasu
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida-Shimoadachi-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shuji Kaneko
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida-Shimoadachi-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Naoya Nishitani
- Laboratory of Molecular Pharmacology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Satoshi Deyama
- Laboratory of Molecular Pharmacology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Katsuyuki Kaneda
- Laboratory of Molecular Pharmacology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan.
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Giner P, Ortegon S, Bagdas D, O'Dell LE. The influence of ovarian hormones on the putative mechanisms that promote female nicotine use. Curr Opin Neurobiol 2024; 88:102900. [PMID: 39153250 DOI: 10.1016/j.conb.2024.102900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 07/16/2024] [Accepted: 07/22/2024] [Indexed: 08/19/2024]
Abstract
Nicotine use is driven by pleasurable effects, but following chronic exposure, nicotine use becomes largely driven by the desire need to avoid withdrawal symptoms. Current cessation strategies focusing on alleviating withdrawal, but current cessation interventions are less effective for women than men. Also, hormone fluctuations across the menstrual cycle appear to impact use patterns, withdrawal severity, and treatment efficacy. This raises important questions regarding optimal quit dates and the application of hormone interventions to alleviate withdrawal in women. This review surveys the existing literature assessing the impact of ovarian hormones on nicotine withdrawal severity. This is an important issue because women seeking cessation treatments may be using hormone-based contraceptives or hormone replacement post-menopause. Hormone interventions may also offer a novel treatment avenue that is more effective than current cessation approaches. Future work in this area is important for reducing health disparities produced by excessive nicotine use in women.
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Affiliation(s)
- Priscilla Giner
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79902, USA
| | - Sebastian Ortegon
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79902, USA
| | - Deniz Bagdas
- Department of Psychiatry, Yale School of Medicine, New Haven, CT, 06511, USA; Yale Tobacco Center of Regulatory Science, Yale School of Medicine, New Haven, CT, 06511, USA.
| | - Laura E O'Dell
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79902, USA.
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3
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Liu C, Filbey FM. Unlocking the age-old secrets of reward and substance use. Pharmacol Biochem Behav 2024; 239:173766. [PMID: 38604456 DOI: 10.1016/j.pbb.2024.173766] [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: 01/31/2024] [Revised: 03/25/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Although substance use is widespread across the lifespan from early adolescence to older adulthood, the prevalence of substance use disorder (SUD) differs between age groups. These age differences in SUD rates necessitate an investigation into how age moderates reward sensitivity, and consequently influences the risks and consequences related to substance use. This theoretical review integrates evidence from the literature to address the dynamic interplay between age and reward in the context of substance use. Overall, increasing evidence demonstrates that age moderates reward sensitivity and underlying reward system neurobiology. Reward sensitivity undergoes a non-linear trajectory across the lifespan. Low levels of reward sensitivity are associated with childhood and late adulthood. In contrast, high levels are associated with early to late adolescence, followed by a decline in the twenties. These fluctuations in reward sensitivity across the lifespan contribute to complex associations with substance use. This lends support to adolescence and young adulthood as vulnerable periods for the risk of subsequent SUD. More empirical research is needed to investigate reward sensitivity during SUD maintenance and recovery. Future research should also involve larger sample sizes and encompass a broader range of age groups, including older adults.
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Affiliation(s)
- Che Liu
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, TX 75235, United States of America.
| | - Francesca M Filbey
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, TX 75235, United States of America
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4
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Renda B, Andrade AK, Wylie IR, Stone AP, Antenos M, Leri F, Murray JE. Adolescent restraint stress enhances adult nicotine reinforcement in male and female rats. Psychoneuroendocrinology 2024; 161:106927. [PMID: 38113767 DOI: 10.1016/j.psyneuen.2023.106927] [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: 07/02/2023] [Revised: 10/16/2023] [Accepted: 12/10/2023] [Indexed: 12/21/2023]
Abstract
Adolescent stress is a risk factor for the initiation of nicotine use, but whether adolescent stress can enhance nicotine reinforcement when it is initiated later in adulthood is unknown, and it is unclear whether males and females are equally impacted. Therefore, this study assessed physiological responses (body weight and blood serum corticosterone - CORT) to restraint stress (RS) during adolescence (P28-55) or during adulthood (P70-96) in male and female Sprague-Dawley rats. When all subjects reached adulthood (P69 or 110; 2 weeks after termination of stress exposure), they were tested on sucrose preference and intravenous single-dose nicotine (0.03 mg/kg/infusion) self-administration. It was found that all rats displayed a significant CORT response to RS. Importantly, stress during adolescence, but not during adulthood, enhanced subsequent acquisition of nicotine intake tested in adulthood. Although this effect was observed in both sexes, only males displayed reduced body weight gain and adult sucrose preference. Moreover, regardless of stress exposure, females were more stimulated by nicotine, consumed more nicotine overall, and displayed enhanced nicotine seeking. These results suggest that adolescence is a period of heightened sensitivity to the enhancing effect of repeated stress on the susceptibility to develop nicotine dependence later in life in both sexes.
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Affiliation(s)
- Briana Renda
- Department of Psychology, University of Guelph, Guelph, ON, Canada; Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada
| | - Allyson K Andrade
- Department of Psychology, University of Guelph, Guelph, ON, Canada; Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada
| | - Isabella R Wylie
- Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Adiia P Stone
- Department of Psychology, University of Guelph, Guelph, ON, Canada; Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada
| | - Monica Antenos
- Department of Biomedical Sciences, University of Guelph, Guelph, ON, Canada
| | - Francesco Leri
- Department of Psychology, University of Guelph, Guelph, ON, Canada; Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada
| | - Jennifer E Murray
- Department of Psychology, University of Guelph, Guelph, ON, Canada; Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada.
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5
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Javadi-Paydar M, Kerr TM, Taffe MA. Hyperactivity Induced By Vapor Inhalation of Nicotine in Male and Female Rats. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.12.579996. [PMID: 38405720 PMCID: PMC10888868 DOI: 10.1101/2024.02.12.579996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Rationale Preclinical models of electronic nicotine delivery system (ENDS; "e-cigarette") use have been rare, so there is an urgent need to develop experimental approaches to evaluate their effects. Objective To contrast the impact of inhaled nicotine across sex. Methods Male and female Wistar rats were exposed to vapor from a propylene glycol vehicle (PG), nicotine (NIC; 1-30 mg/mL in PG), or were injected with NIC (0.1-0.8 mg/kg, s.c.), and then assessed for changes in temperature and activity. The antagonist mecamylamine (2 mg/kg) was administered prior to NIC to verify pharmacological specificity. Plasma levels of nicotine and cotinine were determined after inhalation and injection. Results Activity increased in females for ~60 minutes after nicotine inhalation, and this was blocked by mecamylamine. A similar magnitude of hyperlocomotion was observed after s.c. administration. Body temperature was reduced after nicotine inhalation by female rats but mecamylamine increased this hypothermia. Increased locomotor activity was observed in male rats if inhalation was extended to 40 minutes or when multiple inhalation epochs were used per session. The temperature of male rats was not altered by nicotine. Plasma nicotine concentrations were slightly lower in male rats than in female rats after 30-minute nicotine vapor inhalation and slightly higher after nicotine injection (1.0 mg/kg, s.c.). Conclusions Nicotine inhalation increases locomotor activity in male and female rats to a similar or greater extent than by subcutaneous injection. Sex differences were observed, which may be related to lower nicotine plasma levels, lower baseline activity and/or a higher vehicle response in males.
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Affiliation(s)
| | - Tony M. Kerr
- Department of Neuroscience; The Scripps Research Institute; La Jolla, CA, USA
| | - Michael A. Taffe
- Department of Neuroscience; The Scripps Research Institute; La Jolla, CA, USA
- Department of Psychiatry, University of California, San Diego; La Jolla, CA, USA
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Ahmed R, Zyla S, Hammond N, Blum K, Thanos PK. The Role of Estrogen Signaling and Exercise in Drug Abuse: A Review. Clin Pract 2024; 14:148-163. [PMID: 38248436 PMCID: PMC10801537 DOI: 10.3390/clinpract14010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/13/2023] [Accepted: 12/21/2023] [Indexed: 01/23/2024] Open
Abstract
BACKGROUND Discovering how sex differences impact the efficacy of exercise regimens used for treating drug addiction is becoming increasingly important. Estrogen is a hormone believed to explain a large portion of sex differences observed during drug addiction, and why certain exercise regimens are not equally effective between sexes in treatment. Addiction is currently a global hindrance to millions, many of whom are suffering under the influence of their brain's intrinsic reward system coupled with external environmental factors. Substance abuse disorders in the U.S. alone cost billions of dollars annually. REVIEW SUMMARY Studies involving the manipulation of estrogen levels in female rodents, primarily via ovariectomy, highlight its impact regarding drug addiction. More specifically, female rodents with higher estrogen levels during the estrus phase increase cocaine consumption, whereas those in the non-estrus phase (low estrogen levels) decrease cocaine consumption. If estrogen is reintroduced, self-administration increases once again. Exercise has been proven to decrease relapse tendency, but its effect on estrogen levels is not fully understood. CONCLUSIONS Such findings and results discussed in this review suggest that estrogen influences the susceptibility of females to relapse. Therefore, to improve drug-abuse-related treatment, exercise regimens for females should be generated based on key sex differences with respect to males.
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Affiliation(s)
- Rania Ahmed
- Department of Psychology, University at Buffalo, Buffalo, NY 14203, USA;
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY 14203, USA; (S.Z.); (N.H.)
| | - Samuel Zyla
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY 14203, USA; (S.Z.); (N.H.)
| | - Nikki Hammond
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY 14203, USA; (S.Z.); (N.H.)
| | - Kenneth Blum
- Division of Addiction Research Education, Center for Sports, Exercise and Mental Health, Western University Health Sciences, Pomona, CA 91766, USA;
| | - Panayotis K. Thanos
- Department of Psychology, University at Buffalo, Buffalo, NY 14203, USA;
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY 14203, USA; (S.Z.); (N.H.)
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Martínez M, Espinoza VE, Garcia V, Uribe KP, Negishi K, Estevao IL, Carcoba LM, O'Dell LE, Khan AM, Mendez IA. Withdrawal from repeated nicotine vapor exposure increases somatic signs of physical dependence, anxiety-like behavior, and brain reward thresholds in adult male rats. Neuropharmacology 2023; 240:109681. [PMID: 37611823 PMCID: PMC11253717 DOI: 10.1016/j.neuropharm.2023.109681] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/25/2023]
Abstract
Nicotine vapor consumption via electronic nicotine delivery systems has increased over the last decade. While prior work has shed light on the health effects of nicotine vapor inhalation, its unique effects on the brain and behavior have not been thoroughly explored. In this study we assessed markers of withdrawal following 14 days of nicotine vapor exposure. For Experiment 1, 21 adult male rats were exposed to ambient air or 6, 12, or 24 mg/mL nicotine vapor for 14 consecutive days. Following exposure on day 14, rats were injected with the nicotinic receptor antagonist mecamylamine (3.0 mg/mL) and assessed for somatic withdrawal signs and anxiety-like behavior in the elevated plus maze. For Experiment 2, 12 adult male rats were tested for intracranial self-stimulation (ICSS) immediately following exposure to vehicle vapor (50%/50%, vegetable glycerin/propylene glycol) or 24 mg/mL nicotine vapor, for 14 consecutive days. ICSS behavior was assessed for an additional 14 days, following cessation of repeated vapor exposure. Results reveal that rats with repeated nicotine vapor exposure display an increase in behavioral indicators of withdrawal following injection of mecamylamine (precipitated withdrawal). Additionally, increases in ICSS stimulation thresholds, indicative of reduced brain reward sensitivity, persist following cessation of repeated nicotine vapor exposure (spontaneous withdrawal). These data suggest that repeated e-cigarette use leads to nicotine dependence and withdrawal that affects behavior and brain reward function. Further characterization of the health effects of nicotine vapor is necessary to improve treatment strategies for nicotine use disorder and public health policies related to novel nicotine delivery systems.
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Affiliation(s)
- Michelle Martínez
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Veronika E Espinoza
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Valeria Garcia
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Kevin P Uribe
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Kenichiro Negishi
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Igor L Estevao
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Luis M Carcoba
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Laura E O'Dell
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA; Interdisciplinary Group for Neuroscience Investigation, Training and Education (IGNITE), The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Arshad M Khan
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX, 79968, USA; Interdisciplinary Group for Neuroscience Investigation, Training and Education (IGNITE), The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Ian A Mendez
- School of Pharmacy, Department of Pharmaceutical Sciences, The University of Texas at El Paso, El Paso, TX, 79968, USA; Interdisciplinary Group for Neuroscience Investigation, Training and Education (IGNITE), The University of Texas at El Paso, El Paso, TX, 79968, USA.
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Chen YC, Rindner DJ, Fowler JP, Lallai V, Mogul A, Demuro A, Lur G, Fowler CD. Extracellular ATP Neurotransmission and Nicotine Sex-Specifically Modulate Habenular Neuronal Activity in Adolescence. J Neurosci 2023; 43:8259-8270. [PMID: 37821229 PMCID: PMC10697394 DOI: 10.1523/jneurosci.1290-23.2023] [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: 06/26/2023] [Revised: 09/20/2023] [Accepted: 09/29/2023] [Indexed: 10/13/2023] Open
Abstract
The recent increase in the use of nicotine products by teenagers has revealed an urgent need to better understand the impact of nicotine on the adolescent brain. Here, we sought to examine the actions of extracellular ATP as a neurotransmitter and to investigate whether ATP and nicotinic signaling interact during adolescence. With the GRABATP (G-protein-coupled receptor activation-based ATP sensor), we first demonstrated that nicotine induces extracellular ATP release in the medial habenula, a brain region involved in nicotine aversion and withdrawal. Using patch-clamp electrophysiology, we then demonstrated that activation of the ATP receptors P2X or P2Y1 increases the neuronal firing of cholinergic neurons. Surprisingly, contrasting interactive effects were observed with nicotine exposure. For the P2X receptor, activation had no observable effect on acute nicotine-mediated activity, but during abstinence after 10 d of nicotine exposure, coexposure to nicotine and the P2X agonist potentiated neuronal activity in female, but not male, neurons. For P2Y1 signaling, a potentiated effect of the agonist and nicotine was observed with acute exposure, but not following extended nicotine exposure. These data reveal a complex interactive effect between nicotinic and ATP signaling in the adolescent brain and provide mechanistic insights into extracellular ATP signaling with sex-specific alterations of neuronal responses based on prior drug exposure.SIGNIFICANCE STATEMENT In these studies, it was discovered that nicotine induces extracellular ATP release in the medial habenula and subsequent activation of the ATP purinergic receptors increases habenular cholinergic neuronal firing in the adolescent brain. Interestingly, following extended nicotine exposure, nicotine was found to alter the interplay between purinergic and nicotinic signaling in a sex-specific manner. Together, these studies provide a novel understanding for the role of extracellular ATP in mediating habenular activity and reveal how nicotine exposure during adolescence alters these signaling mechanisms, which has important implications given the high incidence of e-cigarette/vape use by youth.
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Affiliation(s)
- Yen-Chu Chen
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - Daniel Jun Rindner
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - James P Fowler
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - Valeria Lallai
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - Allison Mogul
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - Angelo Demuro
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - Gyorgy Lur
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - Christie D Fowler
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
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Kuebler IRK, Liu Y, Bueno Álvarez BS, Huber NM, Jolton JA, Dasari R, Wakabayashi KT. Melanin-concentrating hormone receptor antagonism differentially attenuates nicotine experience-dependent locomotor behavior in female and male rats. Pharmacol Biochem Behav 2023; 232:173649. [PMID: 37793486 PMCID: PMC10985048 DOI: 10.1016/j.pbb.2023.173649] [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: 07/18/2023] [Revised: 09/14/2023] [Accepted: 09/27/2023] [Indexed: 10/06/2023]
Abstract
Nicotine is a significant public health concern because it is the primary pharmacological agent in tobacco use disorder. One neural system that has been implicated in the symptoms of several substance use disorders is the melanin-concentrating hormone (MCH) system. MCH regulates various motivated behaviors depending on sex, yet little is known of how this interaction affects experience with drugs of abuse, particularly nicotine. The goal of this study was to determine the effect of MCH receptor antagonism on experience-dependent nicotine-induced locomotion after chronic exposure, particularly on the expression of locomotor sensitization. Adult female and male Wistar rats were given saline then cumulative doses of nicotine (0.1, 0.32, 0.56, and 1.0 mg/kg) intraperitoneally to determine the acute effects of nicotine (day 1). Next, rats were treated with 1.0 mg/kg nicotine for 6 days, given an identical series of cumulative doses (day 8), and then kept in a drug-free state for 6 days. On day 15, rats were pretreated with vehicle or the MCH receptor antagonist GW803430 (10 or 30 mg/kg) before another series of cumulative doses to assess response to chronic nicotine. After vehicle, male rats increased nicotine locomotor activation from day 1 to day 15, and both sexes showed a sensitized response when normalized to saline. The lower dose of GW803430 decreased locomotion compared to vehicle in females, while the higher dose decreased locomotion in males. Both sexes showed nicotine dose-dependent effects of GW803430, strongest at lower doses of nicotine. Controlling for sex-based locomotor differences revealed that females are more sensitive to GW803430. The high dose of GW803430 also decreased saline locomotion in males. Together, the results of our study suggest that MCH is involved in the expression of nicotine locomotor sensitization, and that MCH regulates these nicotine behavioral symptoms differently across sex.
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Affiliation(s)
- Isabel R K Kuebler
- Neurocircuitry of Motivated Behavior Laboratory, Department of Psychology, University of Nebraska-Lincoln, 1220 T St., Lincoln, NE 68588, United States of America
| | - Youxi Liu
- Neurocircuitry of Motivated Behavior Laboratory, Department of Psychology, University of Nebraska-Lincoln, 1220 T St., Lincoln, NE 68588, United States of America
| | - Bárbara S Bueno Álvarez
- Neurocircuitry of Motivated Behavior Laboratory, Department of Psychology, University of Nebraska-Lincoln, 1220 T St., Lincoln, NE 68588, United States of America
| | - Noah M Huber
- Neurocircuitry of Motivated Behavior Laboratory, Department of Psychology, University of Nebraska-Lincoln, 1220 T St., Lincoln, NE 68588, United States of America
| | - Joshua A Jolton
- Neurocircuitry of Motivated Behavior Laboratory, Department of Psychology, University of Nebraska-Lincoln, 1220 T St., Lincoln, NE 68588, United States of America
| | - Raaga Dasari
- Neurocircuitry of Motivated Behavior Laboratory, Department of Psychology, University of Nebraska-Lincoln, 1220 T St., Lincoln, NE 68588, United States of America
| | - Ken T Wakabayashi
- Neurocircuitry of Motivated Behavior Laboratory, Department of Psychology, University of Nebraska-Lincoln, 1220 T St., Lincoln, NE 68588, United States of America; Rural Drug Addiction Research Center, University of Nebraska-Lincoln, 660 N 12th St., Lincoln, NE 68588, United States of America.
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10
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Quintanilla ME, Rivera-Meza M, Berríos-Cárcamo P, Cassels BK. Reduction of nicotine and ethanol intake in alcohol-preferring (UChB) female rats by the α4β2 nicotinic acetylcholine receptor partial agonists 5-bromocytisine and cytisine. Drug Alcohol Depend 2023; 250:110900. [PMID: 37515828 DOI: 10.1016/j.drugalcdep.2023.110900] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 06/25/2023] [Accepted: 07/11/2023] [Indexed: 07/31/2023]
Abstract
RATIONALE Neuronal nicotinic acetylcholine receptors (nAChRs) are implicated in the reinforcing effects of nicotine and ethanol. Previous studies have shown that cytisine and its 5-bromo derivative are partial agonists at the α4β2 nAChRs and that the parent molecule cytisine is effective in reducing both nicotine- and ethanol-self-administration in rats. However, whether 5-bromocytisine affects nicotine or ethanol self-administration was unknown. OBJECTIVES The present study compared the effects of 5-bromocytisine and cytisine on nicotine self-administration and further assessed the effect of daily drug injection on voluntary ethanol consumption in alcohol-preferring female rats. Animals were administered a 1.5mg/kg i.p. dose of 5-bromocytisine or cytisine every day for 15-16 days. RESULTS The initial efficacy of 5-bromocytisine and cytisine in reducing nicotine intake was similar (-80%) while for voluntary ethanol intake 5-bromocytisine was a superior inhibitor over cytisine (-78% and -40% respectively). The efficacy of cytisine began to diminish after 10 days of daily administration, which was attributed to tolerance development to its inhibitory effects both on nicotine and ethanol self-administration. Tolerance did not develop for 5-bromocytisine. CONCLUSION 5-Bromocytisine, a weaker α4β2 nAChR partial agonist than cytisine, also produces a sustained inhibition of both nicotine and ethanol self-administration, and unlike cytisine, it does not develop tolerance.
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Affiliation(s)
- María Elena Quintanilla
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Science, Faculty of Medicine, University of Chile, Santiago, Chile.
| | - Mario Rivera-Meza
- Department of Pharmacological and Toxicological Chemistry, Faculty of Chemical and Pharmaceutical Sciences, University of Chile, Santiago, Chile.
| | - Pablo Berríos-Cárcamo
- Center for Regenerative Medicine, Faculty of Medicine Clínica Alemana-Universidad del Desarrollo, Santiago 7710162, Chile.
| | - Bruce K Cassels
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago 7800003, Chile.
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Xiang S, Jia T, Xie C, Cheng W, Chaarani B, Banaschewski T, Barker GJ, Bokde ALW, Büchel C, Desrivières S, Flor H, Grigis A, Gowland PA, Brühl R, Martinot JL, Martinot MLP, Nees F, Orfanos DP, Poustka L, Hohmann S, Fröhner JH, Smolka MN, Vaidya N, Walter H, Whelan R, Garavan H, Schumann G, Sahakian BJ, Robbins TW, Feng J. Association between vmPFC gray matter volume and smoking initiation in adolescents. Nat Commun 2023; 14:4684. [PMID: 37582920 PMCID: PMC10427673 DOI: 10.1038/s41467-023-40079-2] [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: 10/06/2022] [Accepted: 07/12/2023] [Indexed: 08/17/2023] Open
Abstract
Smoking of cigarettes among young adolescents is a pressing public health issue. However, the neural mechanisms underlying smoking initiation and sustenance during adolescence, especially the potential causal interactions between altered brain development and smoking behaviour, remain elusive. Here, using large longitudinal adolescence imaging genetic cohorts, we identify associations between left ventromedial prefrontal cortex (vmPFC) gray matter volume (GMV) and subsequent self-reported smoking initiation, and between right vmPFC GMV and the maintenance of smoking behaviour. Rule-breaking behaviour mediates the association between smaller left vmPFC GMV and smoking behaviour based on longitudinal cross-lagged analysis and Mendelian randomisation. In contrast, smoking behaviour associated longitudinal covariation of right vmPFC GMV and sensation seeking (especially hedonic experience) highlights a potential reward-based mechanism for sustaining addictive behaviour. Taken together, our findings reveal vmPFC GMV as a possible biomarker for the early stages of nicotine addiction, with implications for its prevention and treatment.
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Affiliation(s)
- Shitong Xiang
- Institute for Science and Technology of Brain-inspired Intelligence (ISTBI), Fudan University, Shanghai, China
- Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence (Fudan University), Ministry of Education, Shanghai, China
| | - Tianye Jia
- Institute for Science and Technology of Brain-inspired Intelligence (ISTBI), Fudan University, Shanghai, China.
- Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence (Fudan University), Ministry of Education, Shanghai, China.
- Centre for Population Neuroscience and Stratified Medicine (PONS Centre), ISTBI, Fudan University, Shanghai, China.
- Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.
| | - Chao Xie
- Institute for Science and Technology of Brain-inspired Intelligence (ISTBI), Fudan University, Shanghai, China
- Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence (Fudan University), Ministry of Education, Shanghai, China
| | - Wei Cheng
- Institute for Science and Technology of Brain-inspired Intelligence (ISTBI), Fudan University, Shanghai, China
- Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence (Fudan University), Ministry of Education, Shanghai, China
| | - Bader Chaarani
- Departments of Psychiatry and Psychology, University of Vermont, Burlington, VT, USA
| | - Tobias Banaschewski
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Gareth J Barker
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Arun L W Bokde
- Discipline of Psychiatry, School of Medicine and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland
| | | | - Sylvane Desrivières
- Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Herta Flor
- Institute of Cognitive and Clinical Neuroscience, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- Department of Psychology, School of Social Sciences, University of Mannheim, Mannheim, Germany
| | - Antoine Grigis
- NeuroSpin, C.E.A., Université Paris-Saclay, Gif-sur-Yvette, France
| | - Penny A Gowland
- Sir Peter Mansfield Imaging Centre School of Physics and Astronomy, University of Nottingham, Nottingham, UK
| | - Rüdiger Brühl
- Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany
| | - Jean-Luc Martinot
- Institut National de la Santé et de la Recherche Médicale, INSERM U1299 'Trajectoires développementales en psychiatrie', Université Paris-Saclay, Ecole Normale supérieure Paris-Saclay, CNRS UMR9010, Centre Borelli, Gif-sur-Yvette, France
| | - Marie-Laure Paillère Martinot
- Institut National de la Santé et de la Recherche Médicale, INSERM U1299 'Trajectoires développementales en psychiatrie', Université Paris-Saclay, Ecole Normale supérieure Paris-Saclay, CNRS UMR9010, Centre Borelli, Gif-sur-Yvette, France
- AP-HP, Sorbonne Université, Department of Child and Adolescent Psychiatry, Pitié-Salpêtrière Hospital, Paris, France
| | - Frauke Nees
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- Institute of Cognitive and Clinical Neuroscience, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- Institute of Medical Psychology and Medical Sociology, University Medical Center Schleswig-Holstein, Kiel University, Kiel, Germany
| | | | - Luise Poustka
- Department of Child and Adolescent Psychiatry, Center for Psychosocial Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Sarah Hohmann
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Juliane H Fröhner
- Department of Psychiatry and Psychotherapy, Technische Universität Dresden, Dresden, Germany
| | - Michael N Smolka
- Department of Psychiatry and Psychotherapy, Technische Universität Dresden, Dresden, Germany
| | - Nilakshi Vaidya
- Department of Psychiatry and Neurosciences, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität BerlinHumboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Henrik Walter
- Department of Psychiatry and Neurosciences, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität BerlinHumboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Robert Whelan
- School of Psychology and Global Brain Health Institute, Trinity College Dublin, Dublin, Ireland
| | - Hugh Garavan
- Departments of Psychiatry and Psychology, University of Vermont, Burlington, VT, USA
| | - Gunter Schumann
- Institute for Science and Technology of Brain-inspired Intelligence (ISTBI), Fudan University, Shanghai, China
- Centre for Population Neuroscience and Stratified Medicine (PONS Centre), ISTBI, Fudan University, Shanghai, China
- Department of Psychiatry and Neurosciences, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität BerlinHumboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Centre for Population Neuroscience and Stratified Medicine (PONS Centre), Charité University Medicine Berlin, Berlin, Germany
| | - Barbara J Sahakian
- Institute for Science and Technology of Brain-inspired Intelligence (ISTBI), Fudan University, Shanghai, China
- Department of Psychiatry and Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - Trevor W Robbins
- Institute for Science and Technology of Brain-inspired Intelligence (ISTBI), Fudan University, Shanghai, China.
- Department of Psychology and Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK.
| | - Jianfeng Feng
- Institute for Science and Technology of Brain-inspired Intelligence (ISTBI), Fudan University, Shanghai, China.
- Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence (Fudan University), Ministry of Education, Shanghai, China.
- Department of Computer Science, University of Warwick, Coventry, United Kingdom.
- Zhangjiang Fudan International Innovation Center, Shanghai, China.
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12
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Manke HN, Rice KC, Riley AL. Effects of Methylone Pre-Exposure on Fluoxetine-Induced Conditioned Taste Avoidance in Male and Female Sprague-Dawley Rats. Brain Sci 2023; 13:brainsci13040585. [PMID: 37190550 DOI: 10.3390/brainsci13040585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023] Open
Abstract
Background: Prior work has reported that a drug’s aversive effects (as indexed by taste avoidance conditioning) are attenuated when the pre-exposure and conditioning drugs are the same or different. The latter, otherwise known as cross-drug pre-exposure, is especially interesting as it has been used as a tool to assess mechanisms underlying the aversive effects of drugs. We previously reported that methylone pre-exposure differentially impacted the aversive effects of MDPV and MDMA (MDPV > MDMA), a difference consistent with the dopaminergic mediation of methylone’s aversive effects. To examine the possible role of serotonin (5-HT) in methylone’s aversive effects, the present study assessed the effects of methylone pre-exposure on taste avoidance induced by the 5-HT reuptake inhibitor fluoxetine. Methods: Male and female Sprague-Dawley rats were exposed to 10 mg/kg of methylone every 4th day (for a total of 5 injections) prior to taste avoidance training with 10 mg/kg of fluoxetine. Results: Fluoxetine induced significant taste avoidance (each p < 0.05) that was independent of sex. Methylone pre-exposure had no impact on avoidance produced by fluoxetine in either males or females (each p > 0.05). Conclusions: Methylone pre-exposure had no impact on fluoxetine-induced avoidance. These findings suggest that it is unlikely that 5-HT mediates the aversive effects of methylone. The implications of the present results for the mechanisms mediating methylone’s aversive effects were discussed. Understanding such mechanisms is important in predictions relevant to drug history and abuse liability as a variety of subject and experiential factors known to affect (reduce) a drug’s aversive effects may increase its use and potential for abuse.
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Affiliation(s)
- Hayley N. Manke
- Psychopharmacology Laboratory, Center for Neuroscience and Behavior, Department of Neuroscience, American University, 4400 Massachusetts Ave, NW, Washington, DC 20016, USA
| | - Kenner C. Rice
- Drug Design and Synthesis Section, National Institute on Drug Abuse (NIDA), National Institute on Alcohol Abuse and Alcoholism (NIAAA), Bethesda, MD 20892, USA
| | - Anthony L. Riley
- Psychopharmacology Laboratory, Center for Neuroscience and Behavior, Department of Neuroscience, American University, 4400 Massachusetts Ave, NW, Washington, DC 20016, USA
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Colyer-Patel K, Kuhns L, Weidema A, Lesscher H, Cousijn J. Age-dependent effects of tobacco smoke and nicotine on cognition and the brain: A systematic review of the human and animal literature comparing adolescents and adults. Neurosci Biobehav Rev 2023; 146:105038. [PMID: 36627063 DOI: 10.1016/j.neubiorev.2023.105038] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/21/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023]
Abstract
Cigarette smoking is often initiated during adolescence and an earlier age of onset is associated with worse health outcomes later in life. Paradoxically, the transition towards adulthood also marks the potential for recovery, as the majority of adolescents are able to quit smoking when adulthood emerges. This systematic review aimed to evaluate the evidence from both human and animal studies for the differential impact of adolescent versus adult repeated and long-term tobacco and nicotine exposure on cognitive and brain outcomes. The limited human studies and more extensive yet heterogeneous animal studies, provide preliminary evidence of heightened fear learning, anxiety-related behaviour, reward processing, nicotinic acetylcholinergic receptors expression, dopamine expression and serotonin functioning after adolescent compared to adult exposure. Effects of nicotine or tobacco use on impulsivity were comparable across age groups. These findings provide novel insights into the mechanisms underlying adolescents' vulnerability to tobacco and nicotine. Future research is needed to translate animal to human findings, with a focus on directly linking a broader spectrum of brain and behavioural outcomes.
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Affiliation(s)
- Karis Colyer-Patel
- Neuroscience of Addiction (NofA) Lab, Department of Psychology, Education & Child Studies, Erasmus University Rotterdam, the Netherlands.
| | - Lauren Kuhns
- Department of Psychology, University of Amsterdam, Amsterdam, the Netherlands
| | - Alix Weidema
- Neuroscience of Addiction (NofA) Lab, Department of Psychology, Education & Child Studies, Erasmus University Rotterdam, the Netherlands
| | - Heidi Lesscher
- Department Population Health Sciences, Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Janna Cousijn
- Neuroscience of Addiction (NofA) Lab, Department of Psychology, Education & Child Studies, Erasmus University Rotterdam, the Netherlands; Department of Psychology, University of Amsterdam, Amsterdam, the Netherlands
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14
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Towers EB, Williams IL, Qillawala EI, Rissman EF, Lynch WJ. Sex/Gender Differences in the Time-Course for the Development of Substance Use Disorder: A Focus on the Telescoping Effect. Pharmacol Rev 2023; 75:217-249. [PMID: 36781217 PMCID: PMC9969523 DOI: 10.1124/pharmrev.121.000361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 10/05/2022] [Accepted: 10/25/2022] [Indexed: 12/14/2022] Open
Abstract
Sex/gender effects have been demonstrated for multiple aspects of addiction, with one of the most commonly cited examples being the "telescoping effect" where women meet criteria and/or seek treatment of substance use disorder (SUD) after fewer years of drug use as compared with men. This phenomenon has been reported for multiple drug classes including opioids, psychostimulants, alcohol, and cannabis, as well as nonpharmacological addictions, such as gambling. However, there are some inconsistent reports that show either no difference between men and women or opposite effects and a faster course to addiction in men than women. Thus, the goals of this review are to evaluate evidence for and against the telescoping effect in women and to determine the conditions/populations for which the telescoping effect is most relevant. We also discuss evidence from preclinical studies, which strongly support the validity of the telescoping effect and show that female animals develop addiction-like features (e.g., compulsive drug use, an enhanced motivation for the drug, and enhanced drug-craving/vulnerability to relapse) more readily than male animals. We also discuss biologic factors that may contribute to the telescoping effect, such as ovarian hormones, and its neurobiological basis focusing on the mesolimbic dopamine reward pathway and the corticomesolimbic glutamatergic pathway considering the critical roles these pathways play in the rewarding/reinforcing effects of addictive drugs and SUD. We conclude with future research directions, including intervention strategies to prevent the development of SUD in women. SIGNIFICANCE STATEMENT: One of the most widely cited gender/sex differences in substance use disorder (SUD) is the "telescoping effect," which reflects an accelerated course in women versus men for the development and/or seeking treatment for SUD. This review evaluates evidence for and against a telescoping effect drawing upon data from both clinical and preclinical studies. We also discuss the contribution of biological factors and underlying neurobiological mechanisms and highlight potential targets to prevent the development of SUD in women.
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Affiliation(s)
- Eleanor Blair Towers
- Psychiatry and Neurobehavioral Sciences (E.B.T., I.L.W., E.I.Q., W.J.L.) and Medical Scientist Training Program (E.B.T.), University of Virginia, Charlottesville, Virginia, and Center for Human Health and the Environment and Program in Genetics, North Carolina State University, Raleigh, North Carolina (E.F.R.)
| | - Ivy L Williams
- Psychiatry and Neurobehavioral Sciences (E.B.T., I.L.W., E.I.Q., W.J.L.) and Medical Scientist Training Program (E.B.T.), University of Virginia, Charlottesville, Virginia, and Center for Human Health and the Environment and Program in Genetics, North Carolina State University, Raleigh, North Carolina (E.F.R.)
| | - Emaan I Qillawala
- Psychiatry and Neurobehavioral Sciences (E.B.T., I.L.W., E.I.Q., W.J.L.) and Medical Scientist Training Program (E.B.T.), University of Virginia, Charlottesville, Virginia, and Center for Human Health and the Environment and Program in Genetics, North Carolina State University, Raleigh, North Carolina (E.F.R.)
| | - Emilie F Rissman
- Psychiatry and Neurobehavioral Sciences (E.B.T., I.L.W., E.I.Q., W.J.L.) and Medical Scientist Training Program (E.B.T.), University of Virginia, Charlottesville, Virginia, and Center for Human Health and the Environment and Program in Genetics, North Carolina State University, Raleigh, North Carolina (E.F.R.)
| | - Wendy J Lynch
- Psychiatry and Neurobehavioral Sciences (E.B.T., I.L.W., E.I.Q., W.J.L.) and Medical Scientist Training Program (E.B.T.), University of Virginia, Charlottesville, Virginia, and Center for Human Health and the Environment and Program in Genetics, North Carolina State University, Raleigh, North Carolina (E.F.R.)
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15
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Dai HD, Doucet GE, Wang Y, Puga T, Samson K, Xiao P, Khan AS. Longitudinal Assessments of Neurocognitive Performance and Brain Structure Associated With Initiation of Tobacco Use in Children, 2016 to 2021. JAMA Netw Open 2022; 5:e2225991. [PMID: 35947383 PMCID: PMC9366547 DOI: 10.1001/jamanetworkopen.2022.25991] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
IMPORTANCE The landscape of tobacco use is changing. However, information about the association between early-age tobacco use and cognitive performances is limited, especially for emerging tobacco products such as electronic cigarettes (e-cigarettes). OBJECTIVE To assess the association between early-age initiation of tobacco use and cognitive performances measured by the National Institutes of Health (NIH) Toolbox Cognitive Battery and to examine whether initiation is associated with differences in brain morphometry. DESIGN, SETTING, AND PARTICIPANTS This observational cohort study examined the longitudinal associations of initiation of tobacco use with neurocognition using multivariate linear mixed models. Children aged 9 to 10 years from 21 US sites were enrolled in wave 1 (October 1, 2016, to October 31, 2018 [n = 11 729]) and the 2-year follow-up (August 1, 2018, to January 31, 2021 [n = 10 081]) of the Adolescent Brain Cognitive Development (ABCD) Study. EXPOSURES Ever use (vs none) of any tobacco products at wave 1, including e-cigarettes, cigarettes, cigars, smokeless tobacco, hookah, pipes, and nicotine replacement. MAIN OUTCOMES AND MEASURES Neurocognition measured by the NIH Toolbox Cognition Battery and morphometric measures of brain structure and region of interest analysis for the cortex from structural magnetic resonance imaging. RESULTS Among 11 729 participants at wave 1 (mean [SE] age, 9.9 [0.6] years; 47.9% girls and 52.1% boys; 20.3% Hispanic; 14.9% non-Hispanic Black; and 52.1% non-Hispanic White), 116 children reported ever use of tobacco products. Controlling for confounders, tobacco ever users vs nonusers exhibited lower scores in the Picture Vocabulary Tests at wave 1 (b [SE] = -2.9 [0.6]; P < .001) and 2-year follow-up (b [SE] = -3.0 [0.7]; P < .001). The crystalized cognition composite score was lower among tobacco ever users than nonusers both at wave 1 (b [SE] = -2.4 [0.5]; P < .001) and 2-year follow-up (b [SE] = -2.7 [0.8]; P = .005). In structural magnetic resonance imaging, the whole-brain measures in cortical area and volume were significantly lower among tobacco users than nonusers, including cortical area (b [SE] = -5014.8 [1739.8] mm2; P = .004) at wave 1 and cortical volume at wave 1 (b [SE] = -174 621.0 [5857.7] mm3; P = .003) and follow-up (b [SE] = -21 790.8 [7043.9] mm3; P = .002). Further region of interest analysis revealed smaller cortical area and volume in multiple regions across frontal, parietal, and temporal lobes at both waves. CONCLUSIONS AND RELEVANCE In this cohort study, initiating tobacco use in late childhood was associated with inferior cognitive performance and reduced brain structure with sustained effects at 2-year follow-up. These findings suggest that youths vulnerable to e-cigarettes and tobacco products should be treated as a priority population in tobacco prevention.
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Affiliation(s)
| | - Gaelle E. Doucet
- Brain Architecture, Imaging and Cognition Laboratory, Boys Town National Research Hospital, Omaha, Nebraska
| | - Yingying Wang
- Neuroimaging for Language, Literacy & Learning Laboratory, University of Nebraska at Lincoln
| | - Troy Puga
- College of Public Health, University of Nebraska Medical Center, Omaha
| | - Kaeli Samson
- College of Public Health, University of Nebraska Medical Center, Omaha
| | - Peng Xiao
- Bioinformatics and Systems Biology Core, University of Nebraska Medical Center, Omaha
| | - Ali S. Khan
- College of Public Health, University of Nebraska Medical Center, Omaha
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16
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Sex Differences in Psychostimulant Abuse: Implications for Estrogen Receptors and Histone Deacetylases. Genes (Basel) 2022; 13:genes13050892. [PMID: 35627277 PMCID: PMC9140379 DOI: 10.3390/genes13050892] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/11/2022] [Accepted: 05/13/2022] [Indexed: 02/04/2023] Open
Abstract
Substance abuse is a chronic pathological disorder that negatively affects many health and neurological processes. A growing body of literature has revealed gender differences in substance use. Compared to men, women display distinct drug-use phenotypes accompanied by recovery and rehabilitation disparities. These observations have led to the notion that sex-dependent susceptibilities exist along the progression to addiction. Within this scope, neuroadaptations following psychostimulant exposure are thought to be distinct for each sex. This review summarizes clinical findings and animal research reporting sex differences in the subjective and behavioral responses to cocaine, methamphetamine, and nicotine. This discussion is followed by an examination of epigenetic and molecular alterations implicated in the addiction process. Special consideration is given to histone deacetylases and estrogen receptor-mediated gene expression.
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17
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Espinoza VE, Giner P, Liano I, Mendez IA, O'Dell LE. Sex and age differences in approach behavior toward a port that delivers nicotine vapor. J Exp Anal Behav 2022; 117:532-542. [PMID: 35338651 DOI: 10.1002/jeab.756] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 03/04/2022] [Accepted: 03/07/2022] [Indexed: 01/14/2023]
Abstract
The goal of our laboratory is to study the mechanisms that promote nicotine use, particularly in vulnerable populations. To more closely mimic human use patterns, the present study employed nicotine vapor methods involving passive exposure for 14 days in adolescent and adult female and male rats. Age and sex differences in approach behavior (nosepokes) were assessed in a port that delivered nicotine plumes on Day 1 and 14 of our exposure regimen. Controls received ambient air in exposure chambers. After the final session, rats received a nicotinic receptor antagonist to precipitate withdrawal. Then, physical signs, anxiety-like behavior, and plasma levels of cotinine (a nicotine metabolite) were assessed. Over time, females displayed a larger increase in approach behavior to the nicotine port than males, an effect that was larger in adolescents. Nosepoke responses in adolescent females were correlated with anxiety-like behavior, but not physical signs of withdrawal. Adolescents gained more weight than adults regardless of treatment, and the weight gain was larger in male adolescents. Female adolescents also displayed the highest levels of cotinine than all other groups. These findings suggest that nicotine vapor produces greater motivational effects in adolescent females as compared to their adult and male counterparts.
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Affiliation(s)
| | - Priscilla Giner
- Department of Psychology, The University of Texas at El Paso
| | - Isabella Liano
- Department of Psychology, The University of Texas at El Paso
| | - Ian A Mendez
- Department of Pharmaceutical Sciences, The University of Texas at El Paso
| | - Laura E O'Dell
- Department of Psychology, The University of Texas at El Paso
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18
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Barker AM, Moore HN, Buffalari D. Sex Differences in Nicotine Enhancement of Conditioned Place Avoidance Driven by Foot-shock In Male and Female Rats. Nicotine Tob Res 2022; 24:1689-1692. [PMID: 35439811 DOI: 10.1093/ntr/ntac109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 03/29/2022] [Accepted: 04/18/2022] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Tobacco use is driven by nicotine, which can enhance the ability of non-nicotine stimuli, including aversive stimuli, to alter behavior. Sex differences exist in the reinforcement enhancement properties of nicotine, but the degree to which this extends to nicotine's ability to enhance behavior driven by aversive stimuli is unclear. METHODS The current study used adult male and female Sprague-Dawley rats to explore sex differences in nicotine enhancement of footshock-conditioned place avoidance. Footshock-conditioned and control rats were tested for conditioned avoidance of footshock- or control-paired chambers after injections of saline or nicotine (0.3mg/kg, s.c). RESULTS Footshock supported place avoidance in both male and female rats, and nicotine enhanced avoidance. Females showed more avoidance after nicotine than males, even in nonconditioned control rats. CONCLUSIONS These results support the idea that sex differences do exist in nicotine enhancement of aversive stimuli, and suggests the mechanisms through which nicotine supports tobacco dependence in males and females may differ. IMPLICATIONS Nicotine enhancement of non-drug stimuli is thought to play a role in tobacco dependence. Yet previous research of enhancement has overwhelmingly used male subjects and appetitive stimuli. Our findings confirm that nicotine also enhances behavior driven by aversive stimuli, and suggests that females may be more susceptible to nicotine enhancement. Such sex differences suggest sex may be an important factor to consider in treating dependence.
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Affiliation(s)
- Ashley M Barker
- Department of Neuroscience and Psychology, Westminster College, New Wilmington, PA
| | - Haley N Moore
- Department of Neuroscience and Psychology, Westminster College, New Wilmington, PA
| | - Deanne Buffalari
- Department of Neuroscience and Psychology, Westminster College, New Wilmington, PA
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19
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Sex- and Genotype-Dependent Nicotine-Induced Behaviors in Adolescent Rats with a Human Polymorphism (rs2304297) in the 3'-UTR of the CHRNA6 Gene. Int J Mol Sci 2022; 23:ijms23063145. [PMID: 35328565 PMCID: PMC8948824 DOI: 10.3390/ijms23063145] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 12/04/2022] Open
Abstract
In human adolescents, a single nucleotide polymorphism (SNP), rs2304297, in the 3′-UTR of the nicotinic receptor subunit gene, CHRNA6, has been associated with increased smoking. To study the effects of the human CHRNA6 3′-UTR SNP, our lab generated knock-in rodent lines with either C or G SNP alleles. The objective of this study was to determine if the CHRNA6 3′-UTR SNP is functional in the knock-in rat lines. We hypothesized that the human CHRNA6 3′-UTR SNP knock-in does not impact baseline but enhances nicotine-induced behaviors. For baseline behaviors, rats underwent food self-administration at escalating schedules of reinforcement followed by a locomotor assay and a series of anxiety tests (postnatal day (PN) 25-39). In separate cohorts, adolescent rats underwent 1- or 4-day nicotine pretreatment (2×, 30 μg/kg/0.1 mL, i.v.). After the last nicotine injection (PN 31), animals were assessed behaviorally in an open-field chamber, and brain tissue was collected. We show the human CHRNA6 3′-UTR SNP knock-in does not affect food reinforcement, locomotor activity, or anxiety. Further, 4-day, but not 1-day, nicotine exposure enhances locomotion and anxiolytic behavior in a genotype- and sex-specific manner. These findings demonstrate that the human CHRNA6 3′-UTR SNP is functional in our in vivo model.
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20
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Chellian R, Behnood-Rod A, Wilson R, Bruijnzeel AW. Rewarding Effects of Nicotine Self-administration Increase Over Time in Male and Female Rats. Nicotine Tob Res 2021; 23:2117-2126. [PMID: 33987656 DOI: 10.1093/ntr/ntab097] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 05/11/2021] [Indexed: 11/14/2022]
Abstract
INTRODUCTION Smoking and the use of other nicotine-containing products is rewarding in humans. The self-administration of nicotine is also rewarding in male rats. However, it is unknown if there are sex differences in the reward-enhancing effects of nicotine self-administration and if the rewarding effects of nicotine change over time. METHODS Rats were prepared with catheters and intracranial self-stimulation (ICSS) electrodes to investigate the effects of nicotine and saline self-administration on reward function. A decrease in thresholds in the ICSS procedure reflects an enhancement of reward function. The ICSS parameters were determined before and after the self-administration sessions from days 1 to 10, and after the self-administration sessions from days 11 to 15. RESULTS During the first 10 days, there was no sex difference in nicotine intake, but during the last 5 days, the females took more nicotine than the males. During the first 10 days, nicotine self-administration did not lower the brain reward thresholds but decreased the response latencies. During the last 5 days, nicotine lowered the reward thresholds and decreased the response latencies. An analysis with the 5-day averages (days 1-5, 6-10, and 11-15) showed that the reward enhancing and stimulatory effects of nicotine increased over time. There were no sex differences in the reward-enhancing and stimulatory effects of nicotine. The nicotinic receptor antagonist mecamylamine diminished the reward-enhancing and stimulatory effects of nicotine. CONCLUSION These findings indicate that the rewarding effects of nicotine self-administration increase over time, and there are no sex differences in the reward-enhancing effects of nicotine self-administration in rats. IMPLICATIONS This study investigated the rewarding effect of nicotine and saline self-administration in male and female rats. The self-administration of nicotine, but not saline, enhanced brain reward function and had stimulatory effects. The rewarding effects of nicotine increased over time in the males and the females. Despite that the females had a higher level of nicotine intake than the males, the reward-enhancing effects of nicotine self-administration were the same. These findings suggest that in new tobacco and e-cigarette users, nicotine's rewarding effects might increase quickly, and a higher level of nicotine use in females might not translate into greater rewarding effects.
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Affiliation(s)
| | - Azin Behnood-Rod
- Department of Psychiatry, University of Florida, Gainesville, FL, USA
| | - Ryann Wilson
- Department of Psychiatry, University of Florida, Gainesville, FL, USA
| | - Adriaan W Bruijnzeel
- Department of Psychiatry, University of Florida, Gainesville, FL, USA.,Department of Neuroscience, University of Florida, Gainesville, FL, USA
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21
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Lallai V, Chen YC, Roybal MM, Kotha ER, Fowler JP, Staben A, Cortez A, Fowler CD. Nicotine e-cigarette vapor inhalation and self-administration in a rodent model: Sex- and nicotine delivery-specific effects on metabolism and behavior. Addict Biol 2021; 26:e13024. [PMID: 33624410 PMCID: PMC8380743 DOI: 10.1111/adb.13024] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 01/25/2021] [Accepted: 01/30/2021] [Indexed: 01/01/2023]
Abstract
E-cigarettes, which deliver vaporized nicotine, have dramatically risen in popularity in recent years, despite many unanswered questions about safety, efficacy in reducing dependence, and overall impact on public health. Other factors, such as sex, also play an important role in determining behavioral and neurochemical responses to drugs of abuse. In these studies, we sought to develop a protocol for vaporized e-cigarette nicotine self-administration in rats, as a foundation to better understand the differing effects of nicotine exposure routes on behavior and physiological function. We report a novel method that elicits robust nicotine vapor self-administration in male and female rats. Our findings indicate that 5-mg/ml nicotine vape solution provides a high level of consistency in lever-pressing behavior for both males and females. Moreover, in male rats, we find that such e-cigarette nicotine vapor induces similar blood levels of nicotine's main metabolite, cotinine, as that found with intravenous nicotine self-administration. Therefore, the breathing pattern during vapor exposure in males leads to similar levels of titrated nicotine intake as with intravenous nicotine self-administration. Interestingly, a differential effect was found in the females, in which the same conditions of vapor exposure led to decreased cotinine levels with vapor compared to intravenous self-administration. Finally, differences in nicotine-mediated locomotion provide further support of the physiological effects of e-cigarette vapor inhalation. Taken together, our findings reveal important sex differences in nicotine intake based on the route of exposure, and we further establish a protocol for nicotine vapor self-administration in rats.
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Affiliation(s)
- Valeria Lallai
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, California, USA
| | - Yen-Chu Chen
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, California, USA
| | - Mikayla M Roybal
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, California, USA
| | - Eashan R Kotha
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, California, USA
| | - James P Fowler
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, California, USA
| | - Andres Staben
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, California, USA
| | - Angelique Cortez
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, California, USA
| | - Christie D Fowler
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, California, USA
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22
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Cardenas A, Lotfipour S. Age- and Sex-Dependent Nicotine Pretreatment Effects on the Enhancement of Methamphetamine Self-Administration in Sprague-Dawley Rats. Nicotine Tob Res 2021; 24:1186-1192. [PMID: 34669941 DOI: 10.1093/ntr/ntab218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 10/18/2021] [Indexed: 11/12/2022]
Abstract
INTRODUCTION Initiation of tobacco products typically occurs in adolescence. Adolescence is a critical period in development where the maturation of brain neurocircuitry is vulnerable to nicotine. Nicotine-containing products and psychostimulants, such as methamphetamine (METH), are often co-abused. Rodent studies have shown that nicotine exposure in early adolescence increases subsequent drug intake and reward. Given the exponential increase in e-cigarette use among adolescents, there is a pressing need to understand whether adolescent nicotine exposure impacts concurrent increased methamphetamine use. The objective of this study is to evaluate age, sex, and longitudinal effects of nicotine pretreatment on methamphetamine reinforcement. METHODS Male and female Sprague-Dawley rats were pretreated with a sub-chronic, low dose nicotine (2x, 30 μg/kg/0.1 mL, intravenous) or saline during early adolescence (postnatal days 28-31) or adulthood (postnatal days 86-89). Following nicotine pretreatment, on postnatal day 32 or postnatal day 90, animals underwent operant intravenous self-administration for methamphetamine (20 μg/kg/inf) over a 2-hour period for five consecutive days. RESULTS Early adolescent nicotine exposure enhances intravenous methamphetamine self-administration in male, but not female adolescents. Male adult rats self-administer methamphetamine over the 5-day testing period, independent of nicotine exposure. In contrast, nicotine exposure increases methamphetamine self-administration in female adults during the later sessions of the 5-day testing period. CONCLUSIONS Taken together, our data highlight age- and sex-dependent effects of low dose, sub-chronic nicotine pretreatment on subsequent intravenous methamphetamine self-administration. IMPLICATIONS A majority of polysubstance users begin smoking before the age of 18. Mounting evidence highlights adolescent susceptibility to nicotine exposure on brain and behavior. With the escalation in nicotine-containing products and stimulant use among adolescents, it is important to identify the consequences from adolescent nicotine use, including polysubstance use. Our study provides evidence that adolescent nicotine exposure enhances subsequent methamphetamine use, with important sex- and age-dependent effects.
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Affiliation(s)
- Anjelica Cardenas
- Department of Pharmaceutical Sciences, College of Health Sciences, University of California, Irvine, Irvine CA, USA
| | - Shahrdad Lotfipour
- Department of Pharmaceutical Sciences, College of Health Sciences, University of California, Irvine, Irvine CA, USA.,Pathology and Laboratory Medicine, School of Medicine, University of California, Irvine, Irvine CA, USA.,Department of Emergency Medicine, School of Medicine, University of California, Irvine, Irvine, CA, USA
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23
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Lee AM, Mansuri MS, Wilson RS, Lam TT, Nairn AC, Picciotto MR. Sex Differences in the Ventral Tegmental Area and Nucleus Accumbens Proteome at Baseline and Following Nicotine Exposure. Front Mol Neurosci 2021; 14:657064. [PMID: 34335180 PMCID: PMC8317211 DOI: 10.3389/fnmol.2021.657064] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 06/09/2021] [Indexed: 12/20/2022] Open
Abstract
Sex differences in behaviors relevant to nicotine addiction have been observed in rodent models and human subjects. Behavioral, imaging, and epidemiological studies also suggest underlying sex differences in mesolimbic dopamine signaling pathways. In this study we evaluated the proteome in the ventral tegmental area (VTA) and nucleus accumbens (NAc) shell in male and female mice. Experimental groups included two mouse strains (C3H/HeJ and C57BL/6J) at baseline, a sub-chronic, rewarding regimen of nicotine in C3H/HeJ mice, and chronic nicotine administration and withdrawal in C57BL/6J mice. Isobaric labeling with a TMT 10-plex system, sample fractionation, and tandem mass spectrometry were used to quantify changes in protein abundance. In C3H/HeJ mice, similar numbers of proteins were differentially regulated between sexes at baseline compared with within each sex after sub-chronic nicotine administration. In C57BL/6J mice, there were significantly greater numbers of proteins differentially regulated between sexes at baseline compared with within each sex after chronic nicotine administration and withdrawal. Despite differences by sex, strain, and nicotine exposure parameters, glial fibrillary acidic protein (GFAP) and dopamine and cAMP-regulated phosphoprotein of 32 kDa (DARPP-32, Ppp1r1b) were repeatedly identified as significantly altered proteins, especially in the VTA. Further, network analyses showed sex- and nicotine-dependent regulation of a number of signaling pathways, including dopaminergic signaling. Sub-chronic nicotine exposure in female mice increased proteins related to dopaminergic signaling in the NAc shell but decreased them in the VTA, whereas the opposite pattern was observed in male mice. In contrast, dopaminergic signaling pathways were similarly upregulated in both male and female VTA after chronic nicotine and withdrawal. Overall, this study identifies significant sex differences in the proteome of the mesolimbic system, at baseline and after nicotine reward or withdrawal, which may help explain differential trajectories and susceptibility to nicotine addiction in males and females.
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Affiliation(s)
- Angela M Lee
- Department of Psychiatry, Yale University, New Haven, CT, United States.,Yale Interdepartmental Neuroscience Program, New Haven, CT, United States
| | - Mohammad Shahid Mansuri
- Yale/NIDA Neuroproteomics Center, New Haven, CT, United States.,Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, CT, United States
| | - Rashaun S Wilson
- Yale/NIDA Neuroproteomics Center, New Haven, CT, United States.,Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, CT, United States.,W.M Keck Biotechnology Resource Laboratory, Yale University School of Medicine, New Haven, CT, United States
| | - TuKiet T Lam
- Yale/NIDA Neuroproteomics Center, New Haven, CT, United States.,Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, CT, United States.,W.M Keck Biotechnology Resource Laboratory, Yale University School of Medicine, New Haven, CT, United States
| | - Angus C Nairn
- Department of Psychiatry, Yale University, New Haven, CT, United States.,Yale/NIDA Neuroproteomics Center, New Haven, CT, United States
| | - Marina R Picciotto
- Department of Psychiatry, Yale University, New Haven, CT, United States.,Yale Interdepartmental Neuroscience Program, New Haven, CT, United States
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24
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Chellian R, Wilks I, Levin B, Xue S, Behnood-Rod A, Wilson R, McCarthy M, Ravula A, Chandasana H, Derendorf H, Bruijnzeel AW. Tobacco smoke exposure enhances reward sensitivity in male and female rats. Psychopharmacology (Berl) 2021; 238:845-855. [PMID: 33410984 PMCID: PMC7914215 DOI: 10.1007/s00213-020-05736-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 11/25/2020] [Indexed: 12/14/2022]
Abstract
RATIONALE Systemic administration of the tobacco smoke constituent nicotine stimulates brain reward function in rats. However, it is unknown if the inhalation of tobacco smoke affects brain reward function. OBJECTIVES These experiments investigated if exposure to smoke from high-nicotine SPECTRUM research cigarettes increases reward function and affects the rewarding effects of nicotine in adult male and female Wistar rats. METHODS Reward function after smoke or nicotine exposure was investigated using the intracranial self-stimulation (ICSS) procedure. A decrease in reward thresholds reflects an increase in reward function. In the first experiment, the rats were exposed to tobacco smoke for 40 min/day for 9 days, and the rewarding effects of nicotine (0.03-0.6 mg/kg) were investigated 3 weeks later. In the second experiment, the dose effects of tobacco smoke exposure (40-min sessions, 1-4 cigarettes burnt simultaneously) on reward function were investigated. RESULTS Tobacco smoke exposure did not affect the nicotine-induced decrease in reward thresholds or response latencies in male and female rats. Smoke exposure lowered the brain reward thresholds to a similar degree in males and females and caused a greater decrease in latencies in females. There was a positive relationship between plasma nicotine and cotinine levels and the nicotine content of the SPECTRUM research cigarettes. Similar smoke exposure conditions led to higher plasma nicotine and cotinine levels in female than male rats. CONCLUSION These findings indicate that tobacco smoke exposure enhances brain reward function but does not potentiate the rewarding effects of nicotine in male and female rats.
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Affiliation(s)
- Ranjithkumar Chellian
- Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA
| | - Isaac Wilks
- Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA
| | - Brandon Levin
- Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA
| | - Song Xue
- Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA
| | - Azin Behnood-Rod
- Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA
| | - Ryann Wilson
- Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA
| | - Megan McCarthy
- Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA
| | - Abhigyan Ravula
- Department of Pharmaceutics, University of Florida, Gainesville, USA
| | - Hardik Chandasana
- Department of Pharmaceutics, University of Florida, Gainesville, USA
| | - Hartmut Derendorf
- Department of Pharmaceutics, University of Florida, Gainesville, USA
| | - Adriaan W Bruijnzeel
- Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA.
- Department of Neuroscience, University of Florida, Gainesville, FL, USA.
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25
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Quintanilla ME, Morales P, Ezquer F, Ezquer M, Herrera-Marschitz M, Israel Y. Administration of N-acetylcysteine Plus Acetylsalicylic Acid Markedly Inhibits Nicotine Reinstatement Following Chronic Oral Nicotine Intake in Female Rats. Front Behav Neurosci 2021; 14:617418. [PMID: 33633548 PMCID: PMC7902020 DOI: 10.3389/fnbeh.2020.617418] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 12/31/2020] [Indexed: 12/13/2022] Open
Abstract
Background Nicotine is the major addictive component of cigarette smoke and the prime culprit of the failure to quit smoking. Common elements perpetuating the use of addictive drugs are (i) cues associated with the setting in which drug was used and (ii) relapse/reinstatement mediated by an increased glutamatergic tone (iii) associated with drug-induced neuroinflammation and oxidative stress. Aims The present study assessed the effect of the coadministration of the antioxidant N-acetylcysteine (NAC) plus the anti-inflammatory acetylsalicylic acid (ASA) on oral nicotine reinstatement intake following a post-deprivation re-access in female rats that had chronically and voluntarily consumed a nicotine solution orally. The nicotine-induced oxidative stress and neuroinflammation in the hippocampus and its effects on the glutamate transporters GLT-1 and XCT mRNA levels in prefrontal cortex were also analyzed. Results The oral coadministration of NAC (40 mg/kg/day) and ASA (15 mg/kg/day) inhibited by 85% of the oral nicotine reinstatement intake compared to control (vehicle), showing an additive effect of both drugs. Acetylsalicylic acid and N-acetylcysteine normalized hippocampal oxidative stress and blunted the hippocampal neuroinflammation observed upon oral nicotine reinstatement. Nicotine downregulated GLT-1 and xCT gene expression in the prefrontal cortex, an effect reversed by N-acetylcysteine, while acetylsalicylic acid reversed the nicotine-induced downregulation of GLT-1 gene expression. The inhibitory effect of N-acetylcysteine on chronic nicotine intake was blocked by the administration of sulfasalazine, an inhibitor of the xCT transporter. Conclusion Nicotine reinstatement, following post-deprivation of chronic oral nicotine intake, downregulates the mRNA levels of GLT-1 and xCT transporters, an effect reversed by the coadministration of N-acetylcysteine and acetylsalicylic acid, leading to a marked inhibition of nicotine intake. The combination of these drugs may constitute a valuable adjunct in the treatment of nicotine-dependent behaviors.
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Affiliation(s)
- María Elena Quintanilla
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Paola Morales
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.,Department of Neuroscience, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Fernando Ezquer
- Centro de Medicina Regenerativa, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Marcelo Ezquer
- Centro de Medicina Regenerativa, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Mario Herrera-Marschitz
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Yedy Israel
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
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26
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Baumbach JL, McCormick CM. Nicotine sensitization (part 1): estradiol or tamoxifen is required during the induction phase and not the expression phase to enable locomotor sensitization to nicotine in female rats. Psychopharmacology (Berl) 2021; 238:355-370. [PMID: 33130925 DOI: 10.1007/s00213-020-05685-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/19/2020] [Indexed: 11/30/2022]
Abstract
RATIONALE Nicotine sensitization involves two functionally distinct phases: induction and expression. Estradiol enhances nicotine sensitization in female rats, but it is not known whether this enhancement is specific to one or both phases. OBJECTIVES We investigated the effects of estradiol selectively during the induction and the expression of nicotine sensitization. METHODS Ovariectomy (OVX) rats were administered E2 during the induction (2 injection days) and/or the expression phase (9 days later) of nicotine sensitization. The selective estrogen receptor modulator tamoxifen (agonist of ERα and ERß, agonist of the g-coupled estradiol receptor GPER1) also was used to elucidate receptor candidates for the effects of E2 on nicotine sensitization. RESULTS Gonadally intact female rats exhibited expression of nicotine sensitization after a 9-day delay, whereas OVX females did not. Administration of E2 limited to the induction phase of nicotine sensitization rescued expression of nicotine sensitization in OVX females. Tamoxifen during induction did not alter expression of sensitization in gonadally intact female rats, and, like E2, was sufficient to reverse the dampening effects of OVX on expression of sensitization. CONCLUSIONS The enhancing effects of E2 on nicotine sensitization occur during the induction phase of nicotine sensitization, although require a delay to produce the effects on locomotor activity to nicotine, and may involve non-canonical estrogen pathways (e.g., activation of GPER1).
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Affiliation(s)
- Jennet L Baumbach
- Department of Psychology, Centre for Neuroscience, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada
| | - Cheryl M McCormick
- Department of Psychology, Centre for Neuroscience, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada.
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27
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Lkhagvadorj K, Zeng Z, Meyer KF, Verweij LP, Kooistra W, Reinders-Luinge M, Dijkhuizen HW, de Graaf IAM, Plösch T, Hylkema MN. Postnatal Smoke Exposure Further Increases the Hepatic Nicotine Metabolism in Prenatally Smoke Exposed Male Offspring and Is Linked with Aberrant Cyp2a5 Methylation. Int J Mol Sci 2020; 22:ijms22010164. [PMID: 33375250 PMCID: PMC7795156 DOI: 10.3390/ijms22010164] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 12/16/2022] Open
Abstract
Prenatal smoke exposure (PreSE) is a risk factor for nicotine dependence, which is further enhanced by postnatal smoke exposure (PostSE). One susceptibility gene to nicotine dependence is Cytochrome P450 (CYP) 2A6, an enzyme responsible for the conversion of nicotine to cotinine in the liver. Higher CYP2A6 activity is associated with nicotine dependence and could be regulated through DNA methylation. In this study we investigated whether PostSE further impaired PreSE-induced effects on nicotine metabolism, along with Cyp2a5, orthologue of CYP2A6, mRNA expression and DNA methylation. Using a mouse model where prenatally smoke-exposed adult offspring were exposed to cigarette smoke for 3 months, enzyme activity, mRNA levels, and promoter methylation of hepatic Cyp2a5 were evaluated. We found that in male offspring, PostSE increased PreSE-induced cotinine levels and Cyp2a5 mRNA expression. In addition, both PostSE and PreSE changed Cyp2a5 DNA methylation in male groups. PreSE however decreased cotinine levels whereas it had no effect on Cyp2a5 mRNA expression or methylation. These adverse outcomes of PreSE and PostSE were most prominent in males. When considered in the context of the human health aspects, the combined effect of prenatal and adolescent smoke exposure could lead to an accelerated risk for nicotine dependence later in life.
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Affiliation(s)
- Khosbayar Lkhagvadorj
- University Medical Center Groningen, Department of Pathology and Medical Biology, University of Groningen, 9713 GZ Groningen, The Netherlands; (K.L.); (Z.Z.); (K.F.M.); (L.P.V.); (W.K.); (M.R.-L.)
- GRIAC Research Institute, University of Groningen, 9713 AV Groningen, The Netherlands
- Department of Pulmonology and Allergology, Mongolian National University of Medical Sciences, Ulaanbaatar 14210, Mongolia
| | - Zhijun Zeng
- University Medical Center Groningen, Department of Pathology and Medical Biology, University of Groningen, 9713 GZ Groningen, The Netherlands; (K.L.); (Z.Z.); (K.F.M.); (L.P.V.); (W.K.); (M.R.-L.)
- GRIAC Research Institute, University of Groningen, 9713 AV Groningen, The Netherlands
| | - Karolin F. Meyer
- University Medical Center Groningen, Department of Pathology and Medical Biology, University of Groningen, 9713 GZ Groningen, The Netherlands; (K.L.); (Z.Z.); (K.F.M.); (L.P.V.); (W.K.); (M.R.-L.)
- GRIAC Research Institute, University of Groningen, 9713 AV Groningen, The Netherlands
| | - Laura P. Verweij
- University Medical Center Groningen, Department of Pathology and Medical Biology, University of Groningen, 9713 GZ Groningen, The Netherlands; (K.L.); (Z.Z.); (K.F.M.); (L.P.V.); (W.K.); (M.R.-L.)
- GRIAC Research Institute, University of Groningen, 9713 AV Groningen, The Netherlands
| | - Wierd Kooistra
- University Medical Center Groningen, Department of Pathology and Medical Biology, University of Groningen, 9713 GZ Groningen, The Netherlands; (K.L.); (Z.Z.); (K.F.M.); (L.P.V.); (W.K.); (M.R.-L.)
- GRIAC Research Institute, University of Groningen, 9713 AV Groningen, The Netherlands
| | - Marjan Reinders-Luinge
- University Medical Center Groningen, Department of Pathology and Medical Biology, University of Groningen, 9713 GZ Groningen, The Netherlands; (K.L.); (Z.Z.); (K.F.M.); (L.P.V.); (W.K.); (M.R.-L.)
- GRIAC Research Institute, University of Groningen, 9713 AV Groningen, The Netherlands
| | - Henk W. Dijkhuizen
- Faculty of Science and Engineering, University of Groningen, 9713 GZ Groningen, The Netherlands;
| | - Inge A. M. de Graaf
- Department of Pharmacokinetics, Toxicology and Targeting, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV Groningen, The Netherlands;
| | - Torsten Plösch
- University Medical Center Groningen, Department of Obstetrics and Gynecology, University of Groningen, 9713 GZ Groningen, The Netherlands;
| | - Machteld N. Hylkema
- University Medical Center Groningen, Department of Pathology and Medical Biology, University of Groningen, 9713 GZ Groningen, The Netherlands; (K.L.); (Z.Z.); (K.F.M.); (L.P.V.); (W.K.); (M.R.-L.)
- GRIAC Research Institute, University of Groningen, 9713 AV Groningen, The Netherlands
- Correspondence:
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28
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Lkhagvadorj K, Meyer KF, Verweij LP, Kooistra W, Reinders-Luinge M, Dijkhuizen HW, de Graaf IAM, Plösch T, Hylkema MN. Prenatal smoke exposure induces persistent Cyp2a5 methylation and increases nicotine metabolism in the liver of neonatal and adult male offspring. Epigenetics 2020; 15:1370-1385. [PMID: 32573327 PMCID: PMC7678918 DOI: 10.1080/15592294.2020.1782655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/12/2020] [Accepted: 05/15/2020] [Indexed: 02/08/2023] Open
Abstract
Prenatal smoke exposure (PSE) is a risk factor for nicotine dependence. One susceptibility gene for nicotine dependence is Cytochrome P450 (CYP) 2A6, an enzyme responsible for the conversion of nicotine to cotinine and nicotine clearance in the liver. Higher activity of the CYP2A6 enzyme is associated with nicotine dependence, but no research has addressed the PSE effects on the CYP2A6 gene or its mouse homologue Cyp2a5. We hypothesized that PSE affects Cyp2a5 promoter methylation, Cyp2a5 mRNA levels, and nicotine metabolism in offspring. We used a smoke-exposed pregnant mouse model. RNA, DNA, and microsomal protein were isolated from liver tissue of foetal, neonatal, and adult offspring. Enzyme activity, Cyp2a5 mRNA levels, and Cyp2a5 methylation status of six CpG sites within the promoter region were analysed via HPLC, RT-PCR, and bisulphite pyrosequencing. Our data show that PSE induced higher cotinine levels in livers of male neonatal and adult offspring compared to controls. PSE-induced cotinine levels in neonates correlated with Cyp2a5 mRNA expression and promoter methylation at CpG-7 and CpG+45. PSE increased methylation in almost all CpG sites in foetal offspring, and this effect persisted at CpG-74 in male neonatal and adult offspring. Our results indicate that male offspring of mothers which were exposed to cigarette smoke during pregnancy have a higher hepatic nicotine metabolism, which could be regulated by DNA methylation. Given the detected persistence into adulthood, extrapolation to the human situation suggests that sons born from smoking mothers could be more susceptible to nicotine dependence later in life.
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Affiliation(s)
- Khosbayar Lkhagvadorj
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Pulmonology and Allergology, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Karolin F. Meyer
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Laura P. Verweij
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Wierd Kooistra
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Marjan Reinders-Luinge
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Henk W. Dijkhuizen
- Faculty of Science and Engineering, University of Groningen, Groningen, The Netherlands
| | - Inge A. M. de Graaf
- Department of Pharmacokinetics, Toxicology, and Targeting, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, The Netherlands
| | - Torsten Plösch
- Department of Obstetrics and Gynecology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Machteld N. Hylkema
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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Íbias J, Nazarian A. Sex differences in nicotine-induced impulsivity and its reversal with bupropion in rats. J Psychopharmacol 2020; 34:1382-1392. [PMID: 32684065 PMCID: PMC7708527 DOI: 10.1177/0269881120937543] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Enhancement in cognitive impulsivity and the resulting alterations in decision making serve as a contributing factor for the development and maintenance of substance-use disorders. Nicotine-induced increases in impulsivity has been previously reported in male humans and rodents. Although the potential for sex differences in nicotine-induced impulsivity has not been examined. AIMS AND METHODS In the present study, male and female Sprague Dawley rats were submitted to a delay discounting task, in which several consecutive measures of self-control were taken. Firstly, rats were tested with vehicle, and next with nicotine doses of 0.4 and 0.8 mg/kg. Thereafter, chronic treatment with bupropion started, and the animals were tested again. Half the animals continued to receive 0.8 mg/kg of nicotine, while the rest received nicotine and also a daily dose of 30 mg/kg of bupropion. RESULTS When the animals were first tested with nicotine, female rats showed a significant nicotine dose dependent increase of impulsive behaviour, whereas male rats only showed a decrease on their elections of the larger but delayed reward under the highest dose of 0.8 mg/kg of nicotine. Treatment with bupropion blocked the effect of nicotine on decision making in female rats, as they showed results close to their baseline levels. On the other hand, bupropion did not affect the nicotine-induced delay discounting in male rats. CONCLUSION These findings demonstrate sexually dimorphic effects of nicotine on cognitive impulsivity which may help to shed light on nicotine use vulnerabilities observed in women.
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Affiliation(s)
| | - Arbi Nazarian
- Correspondence: Arbi Nazarian, Ph.D., Department of Pharmaceutical Sciences, Western University of Health Sciences, 309 E. Second Street, Pomona, CA 91766, USA. , (909) 469-5424
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OpenVape: An Open-Source E-Cigarette Vapor Exposure Device for Rodents. eNeuro 2020; 7:ENEURO.0279-20.2020. [PMID: 32859723 PMCID: PMC7598908 DOI: 10.1523/eneuro.0279-20.2020] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 07/30/2020] [Accepted: 08/18/2020] [Indexed: 12/20/2022] Open
Abstract
The prevalence of “vaping” has recently seen significant increases in North America, especially in adolescents. However, the behavioral correlates of vaping are largely unexplored. The uptake of existing technologies meant for rodent vapor inhalation remains limited because of a lack of affordability and versatility (ability to be used with a variety of vaporizers). The OpenVape (OV) offers an open-source, low-cost solution that can be used in a variety of research contexts. Here, we present a specific use case, combining the OV apparatus with JUUL e-cigarettes. This apparatus consists of Arduino-operated vacuum pumps that deliver vapor directly from e-cigarettes to exposure chambers. The OV is easy to build and customize for any type of vaporizer (e.g., nicotine pod or tank; cannabis flower or concentrates). To test the OV, we performed biochemical verification and behavioral studies. The behavioral test (conditioned place preference, CPP) was conducted using adolescent and adult animals to assess developmental differences in the rewarding effects of nicotine vapor, as previously observed with injected nicotine. These findings demonstrate that even after brief exposures to nicotine vapor, pharmacologically relevant nicotine and cotinine levels could be detected in plasma, and significant CPP was observed, especially in adolescent rats which showed preference at shorter puff delivery durations (lower nicotine doses) compared with adults. Together, these findings suggest that OV provides an affordable, open-source option for preclinical behavioral research into the effects of vaping.
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Flores RJ, Cruz B, Uribe KP, Correa VL, Arreguin MC, Carcoba LM, Mendez IA, O'Dell LE. Estradiol promotes and progesterone reduces anxiety-like behavior produced by nicotine withdrawal in female rats. Psychoneuroendocrinology 2020; 119:104694. [PMID: 32540678 PMCID: PMC7423767 DOI: 10.1016/j.psyneuen.2020.104694] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 03/17/2020] [Accepted: 04/11/2020] [Indexed: 12/15/2022]
Abstract
This study assessed sex differences and the role of ovarian hormones in nicotine withdrawal. Study 1 compared physical signs, anxiety-like behavior, and corticosterone levels in male, intact female, and ovariectomized (OVX) female rats during nicotine withdrawal. Estradiol (E2) and progesterone levels were also assessed in intact females that were tested during different phases of the 4-day estrous cycle. Study 2 assessed the role of ovarian hormones in withdrawal by comparing the same measures in OVX rats that received vehicle, E2, or E2+progesterone prior to testing. Briefly, rats received a sham surgery or an ovariectomy procedure. Fifteen days later, rats were prepared with a pump that delivered nicotine for 14 days. On the test day, rats received saline or the nicotinic receptor antagonist, mecamylamine to precipitate withdrawal. Physical signs and anxiety-like behavior were assessed on the elevated plus maze (EPM) and light-dark transfer (LDT) tests. During withdrawal, intact females displayed greater anxiety-like behavior and increases in corticosterone levels as compared to male and OVX rats. Females tested in the estrus phase (when E2 is relatively low) displayed less anxiety-like behavior and had lower corticosterone levels versus all other phases. Anxiety-like behavior and corticosterone levels were positively correlated with E2 and negatively correlated with progesterone levels. Intact females displaying high E2/low progesterone showed greater anxiety-like behavior and corticosterone levels as compared to females displaying low E2/high progesterone. Lastly, OVX-E2 rats displayed greater anxiety-like behavior than OVX-E2+progesterone rats. These data suggest that E2 promotes and progesterone reduces anxiety-like behavior produced by nicotine withdrawal.
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Affiliation(s)
- Rodolfo J Flores
- Department of Psychology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Bryan Cruz
- Department of Psychology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Kevin P Uribe
- Department of Psychology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Victor L Correa
- Department of Psychology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Montserrat C Arreguin
- Department of Psychology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Luis M Carcoba
- Department of Psychology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Ian A Mendez
- School of Pharmacy, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Laura E O'Dell
- Department of Psychology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA.
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Xue S, Behnood-Rod A, Wilson R, Wilks I, Tan S, Bruijnzeel AW. Rewarding Effects of Nicotine in Adolescent and Adult Male and Female Rats as Measured Using Intracranial Self-stimulation. Nicotine Tob Res 2020; 22:172-179. [PMID: 30452710 DOI: 10.1093/ntr/nty249] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 11/14/2018] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Tobacco is highly addictive, and after the development of dependence, it is difficult to quit smoking. Therefore, it is important to understand the factors that play a role in the initiation of smoking. The rewarding effects of nicotine play a role in the initiation of smoking and the goal of the present study was to determine the rewarding effects of nicotine in adolescent and adult male and female rats. METHODS Male and female Wistar rats were prepared with intracranial self-stimulation (ICSS) electrodes between postnatal day (P) 23 and 33. They were then trained on the ICSS procedure and the effect of nicotine (0, 0.03, 0.1, 0.3 mg/kg) on the reward thresholds and response latencies was investigated during adolescence (P40-59) or adulthood (>P75). RESULTS Nicotine lowered the brain reward thresholds of the adult and adolescent male and female rats. The nicotine-induced decrease in the reward thresholds was the same in the adult male and adult female rats. However, nicotine induced a greater decrease in the reward thresholds of the adolescent female rats than the adolescent male rats. Nicotine decreased the response latencies of all groups and there was no effect of age or sex. CONCLUSIONS Nicotine enhances reward function and psychomotor performance in adolescent and adult male and female rats. Adolescent female rats are more sensitive to the acute rewarding effects of nicotine than adolescent male rats. Therefore, the rewarding effects of nicotine might play a greater role in the initiation of smoking in adolescent females than in adolescent males. IMPLICATIONS The great majority of people start smoking during adolescence. The present studies suggest that during this period female rats are more sensitive to the acute rewarding effects of low and intermediate doses of nicotine than male rats. The rewarding properties of nicotine play a role in the initiation of smoking and establishing habitual smoking. Therefore, the present findings might explain why adolescent females are at a higher risk for becoming nicotine dependent than adolescent males.
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Affiliation(s)
- Song Xue
- Department of Psychiatry, University of Florida, Gainesville, FL
| | - Azin Behnood-Rod
- Department of Psychiatry, University of Florida, Gainesville, FL
| | - Ryann Wilson
- Department of Psychiatry, University of Florida, Gainesville, FL
| | - Isaac Wilks
- Department of Psychiatry, University of Florida, Gainesville, FL
| | - Sijie Tan
- Department of Psychiatry, University of Florida, Gainesville, FL.,Department of Histology and Embryology, University of South China, Hengyang, Hunan, China
| | - Adriaan W Bruijnzeel
- Department of Psychiatry, University of Florida, Gainesville, FL.,Department of Neuroscience, University of Florida, Gainesville, FL
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Leslie FM. Unique, long-term effects of nicotine on adolescent brain. Pharmacol Biochem Behav 2020; 197:173010. [PMID: 32738256 DOI: 10.1016/j.pbb.2020.173010] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/23/2020] [Accepted: 07/28/2020] [Indexed: 01/20/2023]
Abstract
Adolescence is a time of major plasticity of brain systems that regulate motivated behavior and cognition, and is also the age of peak onset of nicotine use. Although there has been a decline in teen use of cigarettes in recent years, there has been a huge increase in nicotine vaping. It is therefore critically important to understand the impact of nicotine on this critical phase of brain development. Animal studies have shown that nicotine has unique effects on adolescent brain. The goal of this review is therefore to systematically evaluate age- and sex-differences in the effects of nicotine on brain and behavior. Both acute and chronic effects of nicotine on brain biochemistry and behavior, particularly drug reward, aversion, cognition and emotion, are evaluated. Gaps in our current knowledge that need to be addressed are also highlighted. This review compares and integrates human and animals findings. Although there can be no experimental studies in humans to confirm similar behavioral effects of teen nicotine exposure, an emerging observational literature suggests similarities across species. Given the substantial evidence for long-term negative impact of adolescent nicotine exposure on brain and behavior, further longitudinal assessment of health outcomes in teen and young adult e-cigarette users is warranted.
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Affiliation(s)
- Frances M Leslie
- University of California, Irvine, Department of Pharmaceutical Sciences, 367 Med Surge II, Irvine, CA 92697, United States of America.
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Cepeda-Benito A. Nicotine Effects, Body Weight Concerns and Smoking: A Literature Review. Curr Pharm Des 2020; 26:2316-2326. [PMID: 32233995 DOI: 10.2174/1381612826666200401083040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 02/12/2020] [Indexed: 12/23/2022]
Abstract
How people become addicted to cigarette smoking and remain addicted despite repeated attempts to quit requires piecing together a rather complex puzzle. The present review contextualizes the role of nicotine and smoking sensory stimulation on maintaining smoking, describes nicotine's effects on feeding behavior and body weight, and explores the impact of smoking outcome expectancies, including the belief that nicotine suppresses appetite and body weight, on the decision to smoke or vape (use of e-cigarettes). The analysis concludes with a review of rat models of human nicotine intake that attempt to isolate the effects of nicotine on appetite and weight gain. Animal research replicates with relative closeness phenomena observed in smokers, but the rat model falls short of replicating the long-term weight gain observed post-smoking cessation.
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Affiliation(s)
- Antonio Cepeda-Benito
- Department of Psychological Science, Department of Medicine, University of Vermont Cancer Center, University of Vermont, Vermont, United States
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35
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Riley AL, Nelson KH, To P, López-Arnau R, Xu P, Wang D, Wang Y, Shen HW, Kuhn DM, Angoa-Perez M, Anneken JH, Muskiewicz D, Hall FS. Abuse potential and toxicity of the synthetic cathinones (i.e., “Bath salts”). Neurosci Biobehav Rev 2020; 110:150-173. [DOI: 10.1016/j.neubiorev.2018.07.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 06/14/2018] [Accepted: 07/24/2018] [Indexed: 01/22/2023]
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Lee AM, Calarco CA, McKee SA, Mineur YS, Picciotto MR. Variability in nicotine conditioned place preference and stress-induced reinstatement in mice: Effects of sex, initial chamber preference, and guanfacine. GENES, BRAIN, AND BEHAVIOR 2020; 19:e12601. [PMID: 31364813 PMCID: PMC8045136 DOI: 10.1111/gbb.12601] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/25/2019] [Accepted: 07/27/2019] [Indexed: 12/24/2022]
Abstract
Relapse to smoking occurs at higher rates in women compared with men, especially when triggered by stress. Studies suggest that sex-specific interactions between nicotine reward and stress contribute to these sex differences. Accordingly, novel treatment options targeting stress pathways, such as guanfacine, an α2-adrenergic receptor agonist, may provide sex-sensitive therapeutic effects. Preclinical studies are critical for elucidating neurobiological mechanisms of stress-induced relapse and potential therapies, but rodent models of nicotine addiction are often hindered by large behavioral variability. In this study, we used nicotine conditioned place preference to investigate stress-induced reinstatement of nicotine preference in male and female mice, and the effects of guanfacine on this behavior. Our results showed that overall, nicotine induced significant place preference acquisition and swim stress-induced reinstatement in both male and female mice, but with different nicotine dose-response patterns. In addition, we explored the variability in nicotine-dependent behaviors with median split analyses and found that initial chamber preference in each sex differentially accounted for variability in stress-induced reinstatement. In groups that showed significant stress-induced reinstatement, pretreatment with guanfacine attenuated this behavior. Finally, we evaluated neuronal activation by Arc immunoreactivity in the infralimbic cortex, prelimbic cortex, anterior insula, basolateral amygdala, lateral central amygdala and nucleus accumbens core and shell. Guanfacine induced sex-dependent changes in Arc immunoreactivity in the infralimbic cortex and anterior insula. This study demonstrates sex-dependent relationships between initial chamber preference and stress-induced reinstatement of nicotine conditioned place preference, and the effects of guanfacine on both behavior and neurobiological mechanisms.
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Affiliation(s)
- Angela M. Lee
- Department of Psychiatry, Yale University, 34 Park Street, 3rd Floor Research, New Haven, CT 06508, USA
- Yale Interdepartmental Neuroscience Program
| | - Cali A. Calarco
- Department of Psychiatry, Yale University, 34 Park Street, 3rd Floor Research, New Haven, CT 06508, USA
- Yale Interdepartmental Neuroscience Program
| | - Sherry A. McKee
- Department of Psychiatry, Yale University, 34 Park Street, 3rd Floor Research, New Haven, CT 06508, USA
| | - Yann S. Mineur
- Department of Psychiatry, Yale University, 34 Park Street, 3rd Floor Research, New Haven, CT 06508, USA
| | - Marina R. Picciotto
- Department of Psychiatry, Yale University, 34 Park Street, 3rd Floor Research, New Haven, CT 06508, USA
- Yale Interdepartmental Neuroscience Program
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Upadhya MA, Upadhya HM, Borkar CD, Choudhary AG, Singh U, Chavan P, Sakharkar A, Singru P, Subhedar NK, Kokare DM. Nicotine-induced Brain Stimulation Reward is Modulated by Melanocortin-4 Receptors in Ovariectomized Rats. Neuroscience 2020; 431:205-221. [PMID: 32035118 DOI: 10.1016/j.neuroscience.2020.01.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 01/24/2020] [Accepted: 01/28/2020] [Indexed: 11/29/2022]
Abstract
Apart from reproduction, estrogen influences a multitude of processes. Increase in estrogen levels in women is known to promote reward probably mediated via the melanocortin and dopamine systems. Reduced estrogen in post-menopausal women attenuates reward, evoking the need for stimulation with greater rewarding salience. This is reflected in the well-recognized phenomena of difficulty in quitting and increased craving for nicotine in women following the onset of menopause. The present study aims at understanding the role of melanocortin receptors (MC-R) in nicotine-induced reward behavior following ovariectomy in rats. The MC4-R mRNA level was increased in ipsilateral nucleus accumbens (Acb) of the intact rats implanted with electrode in medial forebrain bundle and trained in intracranial self-stimulation (ICSS) paradigm. Additional groups of ICSS trained rats were ovariectomized (OVX) and subjected to reward evaluation. Trained OVX rats revealed a significant increase in threshold frequency and rightward shift in rate frequency curve, suggesting reward deficit behavior. However, pre-administration with nicotine, alpha-melanocyte stimulating hormone (α-MSH) or NDP-MSH (MC4-R agonist) to OVX animals restored the rewarding activity in ICSS protocol; HS014 (MC4-R antagonist) suppressed the lever press activity. Prior treatment with sub-effective doses of α-MSH or NDP-MSH potentiated the reward effect of nicotine, but was attenuated by HS014. Alpha-MSH-immunoreactivity was decreased in the Acb shell, arcuate and paraventricular nucleus of hypothalamus, and ventral bed nucleus of stria terminalis in the OVX rats, while nicotine treatment restored the same. We suggest a role for the endogenous MC system, perhaps acting via MC4-R, in the nicotine-induced reward in OVX rats.
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Affiliation(s)
- Manoj A Upadhya
- Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pashan, Pune 411 008, Maharashtra, India; Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur 440 033, India
| | - Harshita M Upadhya
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur 440 033, India
| | - Chandrashekhar D Borkar
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur 440 033, India
| | - Amit G Choudhary
- Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pashan, Pune 411 008, Maharashtra, India; Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur 440 033, India
| | - Uday Singh
- School of Biological Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Jatni, Odisha 752 050, India
| | - Priyanka Chavan
- Department of Biotechnology, Savitribai Phule Pune University, Pune 411 007, India
| | - Amul Sakharkar
- Department of Biotechnology, Savitribai Phule Pune University, Pune 411 007, India
| | - Praful Singru
- School of Biological Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Jatni, Odisha 752 050, India
| | - Nishikant K Subhedar
- Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pashan, Pune 411 008, Maharashtra, India
| | - Dadasaheb M Kokare
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur 440 033, India.
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Goenaga J, Powell GL, Leyrer-Jackson JM, Piña J, Phan S, Prakapenka AV, Koebele SV, Namba MD, McClure EA, Bimonte-Nelson HA, Gipson CD. N-acetylcysteine yields sex-specific efficacy for cue-induced reinstatement of nicotine seeking. Addict Biol 2020; 25:e12711. [PMID: 30734439 PMCID: PMC6685767 DOI: 10.1111/adb.12711] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 11/05/2018] [Accepted: 11/29/2018] [Indexed: 12/28/2022]
Abstract
Women report greater craving during certain phases of the menstrual cycle. As well, research indicates that pharmacotherapies for smoking may be less efficacious in women compared with men, which may be due to interactions with natural fluctuations in ovarian hormone levels. N-Acetylcysteine (NAC) is a glutamatergic compound that has shown some efficacy in treating substance use disorders and aids in the prevention of relapse. However, it is unclear whether NAC has sex-specific effectiveness for nicotine relapse treatment. Given that NAC has shown promise to reduce nicotine reinstatement in preclinical models using male rats, the exploration of potential sex differences in the efficacy of NAC is warranted. Using a rat model, we first investigated the ability of NAC treatment (100 mg/kg, ip) during nicotine withdrawal with extinction training to reduce cue-induced nicotine seeking in male and female rats. Next, we assessed whether NAC's effects were estrous cycle-dependent for female rats. Results show that following NAC treatment during extinction, reinstatement of nicotine seeking was significantly decreased in males but not females, indicating a sex-specific effect of NAC. Furthermore, for females, both vehicle- and NAC-treated groups significantly reinstated nicotine-seeking behavior compared with extinction, regardless of estrous cycle phase. These results suggest that NAC is inefficacious in reducing nicotine relapse in females regardless of estrous cycle phase at the dose evaluated here. These collective findings could have important clinical implications for use and efficacy of NAC as a pharmacotherapy for freely cycling women smokers.
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Affiliation(s)
| | | | | | - Jose Piña
- Department of Psychology, Arizona State University, Tempe, AZ
| | - Sandy Phan
- Department of Psychology, Arizona State University, Tempe, AZ
| | - Alesia V. Prakapenka
- Department of Psychology, Arizona State University, Tempe, AZ
- Arizona Alzheimer’s Consortium, Phoenix, AZ
| | - Stephanie V. Koebele
- Department of Psychology, Arizona State University, Tempe, AZ
- Arizona Alzheimer’s Consortium, Phoenix, AZ
| | - Mark D. Namba
- Department of Psychology, Arizona State University, Tempe, AZ
| | - Erin A. McClure
- Department of Psychiatry, Medical University of South Carolina, Charleston, SC
| | - Heather A. Bimonte-Nelson
- Department of Psychology, Arizona State University, Tempe, AZ
- Arizona Alzheimer’s Consortium, Phoenix, AZ
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Uribe KP, Correa VL, Pinales BE, Flores RJ, Cruz B, Shan Z, Bruijnzeel AW, Khan AM, O'Dell LE. Overexpression of corticotropin-releasing factor in the nucleus accumbens enhances the reinforcing effects of nicotine in intact female versus male and ovariectomized female rats. Neuropsychopharmacology 2020; 45:394-403. [PMID: 31614362 PMCID: PMC6901467 DOI: 10.1038/s41386-019-0543-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 10/01/2019] [Accepted: 10/07/2019] [Indexed: 12/18/2022]
Abstract
This study assessed the role of stress systems in the nucleus accumbens (NAc) in promoting sex differences in the reinforcing effects of nicotine. Intravenous self-administration (IVSA) of various doses of nicotine was compared following overexpression of corticotropin-releasing factor (CRF) in the NAc of female and male rats. Ovariectomized (OVX) females were also included to assess the role of ovarian hormones in promoting nicotine reinforcement. Rats received intra-NAc administration of an adeno-associated vector that overexpressed CRF (AAV2/5-CRF) or green fluorescent protein (AAV2/5-GFP). All rats were then given extended access (23 h/day) to an inactive and an active lever that delivered nicotine. Separate groups of rats received intra-NAc AAV2/5-CRF and saline IVSA. Rats were also allowed to nose-poke for food and water during IVSA testing. At the end of the study, the NAc was dissected and rt-qPCR methods were used to estimate CRF overexpression and changes in CRF receptors (CRFr1, CRFr2) and the CRF receptor internalizing protein, β-arrestin2 (Arrb2). Overexpression of CRF in the NAc increased nicotine IVSA to a larger extent in intact female versus male and OVX females. Food intake was increased to a larger extent in intact and OVX females as compared to males. The increase in CRF gene expression was similar across all groups; however, in females, overexpression of CRF resulted in a larger increase in CRFr1 and CRFr2 relative to males. In males, overexpression of CRF produced a larger increase in Arrb2 than females, suggesting greater CRF receptor internalization. Our results suggest that stress systems in the NAc promote the reinforcing effectiveness of nicotine in female rats in an ovarian hormone-dependent manner.
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Affiliation(s)
- Kevin P Uribe
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Victor L Correa
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Briana E Pinales
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Rodolfo J Flores
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Bryan Cruz
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Zhiying Shan
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, MI, 49931, USA
| | | | - Arshad M Khan
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX, 79968, USA
- Border Biomedical Research Center, The University of Texas at El Paso, El Paso, TX, 79968, USA
| | - Laura E O'Dell
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, 79968, USA.
- Border Biomedical Research Center, The University of Texas at El Paso, El Paso, TX, 79968, USA.
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40
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Thorpe HHA, Hamidullah S, Jenkins BW, Khokhar JY. Adolescent neurodevelopment and substance use: Receptor expression and behavioral consequences. Pharmacol Ther 2019; 206:107431. [PMID: 31706976 DOI: 10.1016/j.pharmthera.2019.107431] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/30/2019] [Indexed: 12/18/2022]
Abstract
Adolescence is the transitional period between childhood and adulthood, during which extensive brain development occurs. Since this period also overlaps with the initiation of drug use, it is important to consider how substance use during this time might produce long-term neurobiological alterations, especially against the backdrop of developmental changes in neurotransmission. Alcohol, cannabis, nicotine, and opioids all produce marked changes in the expression and function of the neurotransmitter and receptor systems with which they interact. These acute and chronic alterations also contribute to behavioral consequences ranging from increased addiction risk to cognitive or neuropsychiatric behavioral dysfunctions. The current review provides an in-depth overview and update of the developmental changes in neurotransmission during adolescence, as well as the impact of drug exposure during this neurodevelopmental window. While most of these factors have been studied in animal models, which are the focus of this review, future longitudinal studies in humans that assess neural function and behavior will help to confirm pre-clinical findings. Furthermore, the neural changes induced by each drug should also be considered in the context of other contributing factors, such as sex. Further understanding of these consequences can help in the identification of novel approaches for preventing and reversing the neurobiological effects of adolescent substance use.
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Affiliation(s)
- Hayley H A Thorpe
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Ontario, Canada
| | - Shahnaza Hamidullah
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Ontario, Canada
| | - Bryan W Jenkins
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Ontario, Canada
| | - Jibran Y Khokhar
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Ontario, Canada.
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41
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Íbias J, O'Dell LE, Nazarian A. Insulin dependent and independent normalization of blood glucose levels reduces the enhanced rewarding effects of nicotine in a rodent model of diabetes. Behav Brain Res 2018; 351:75-82. [PMID: 29803655 PMCID: PMC6026546 DOI: 10.1016/j.bbr.2018.05.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 05/02/2018] [Accepted: 05/17/2018] [Indexed: 01/19/2023]
Abstract
The rewarding effects of nicotine have been previously shown to be enhanced in rodent models of diabetes. It is presently unclear whether the enhanced nicotine reward observed in the diabetes models are mediated via an insulin or glucose mechanism. This study examined whether the enhanced rewarding effects of nicotine observed in streptozotocin (STZ)-treated rats are insulin-mediated. Male and female rats were treated with STZ and the rewarding effects of nicotine (0.2 mg/kg) were measured using the conditioned place preference (CPP) procedure. Some STZ-treated animals received insulin supplementation via subcutaneous pellets immediately after STZ administration, while other rats received daily injections of dapagliflozin (10 mg/kg), a sodium-glucose cotransporter-2 inhibitor. Both male and female STZ-treated rats displayed hyperglycemia, and their blood glucose levels (BGLs) were normalized to control levels following insulin supplementation or dapagliflozin administration. STZ-treated male rats displayed higher nicotine CPP relative to vehicle-treated controls. This effect was abolished in rats that received insulin supplementation or dapagliflozin administration. STZ-treated female rats displayed reduced levels of nicotine CPP as compared to male rats, regardless of treatment condition. These results suggest that glucose plays a major role in modulating the rewarding effects of nicotine in male rats treated with STZ.
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Affiliation(s)
- Javier Íbias
- Department of Pharmaceutical Sciences, Western University of Health Sciences, Pomona, CA, USA
| | - Laura E O'Dell
- Department of Psychology, University of Texas at El Paso, El Paso, TX, USA
| | - Arbi Nazarian
- Department of Pharmaceutical Sciences, Western University of Health Sciences, Pomona, CA, USA.
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42
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Jandíková H, Dušková M, Stárka L. The influence of smoking and cessation on the human reproductive hormonal balance. Physiol Res 2018; 66:S323-S331. [PMID: 28948816 DOI: 10.33549/physiolres.933724] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Smoking is the most widespread substance dependence in the world. Nicotine and some other components of the cigarette smoke cause various endocrine imbalances, and have negative effects on pituitary, thyroid, adrenal, testicular and ovarian functions. Here, we examined studies that describe the influence of smoking and smoking cessation on the male and female reproductive systems. We also focused on studies providing an account of differences in cessation success rates between men and women. In men, the most common effects associated with smoking are erectile dysfunction and decreasing spermiogram quality. Several groups have studied the effects of cigarette smoking on testosterone levels in men. However, the results have been conflicting. In women, nicotine has an anti-estrogen effect and increases the ratio of androgens to estrogens throughout life. Beside nicotine, other cigarette toxins also cause dysregulation of reproductive and hormonal system, and essentially influence the probability of a successful pregnancy not only in cases of assisted reproduction but also in healthy women. Tobacco addiction is one of the forms of addiction that are generally thought to be different for men and for women. Women are less successful than men in quitting smoking, and nicotine replacement therapy is less effective in female smokers. We also summarize recent studies that have indicated possible reasons.
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Affiliation(s)
- H Jandíková
- Third Medical Department - First Faculty of Medicine, Charles University and General Faculty Hospital in Prague, Prague, Czech Republic, Institute of Endocrinology, Prague, Czech Republic.
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43
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Sex differences in nicotine intravenous self-administration: A meta-analytic review. Physiol Behav 2017; 203:42-50. [PMID: 29158125 DOI: 10.1016/j.physbeh.2017.11.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 11/04/2017] [Accepted: 11/12/2017] [Indexed: 11/22/2022]
Abstract
OBJECTIVE This report reflects a meta-analysis that systematically reviewed the literature on intravenous self-administration (IVSA) of nicotine in female and male rats. The goal was to determine if sex differences in nicotine IVSA exist, estimate the magnitude of the effect, and identify potential moderators of the relationship between sex differences and nicotine consumption. METHODS Extensive search procedures identified 20 studies that met the inclusion criteria of employing both female and male rats in nicotine IVSA procedures. The meta-analysis was conducted on effect size values that were calculated from mean total intake or nicotine deliveries using the Hedges' unbiased gu statistic. RESULTS A random effects analysis revealed that overall females self-administered more nicotine than males (weighted gu=0.18, 95% CI [0.003, 0.34]). Subsequent moderator variable analyses revealed that certain procedural conditions influenced the magnitude of sex differences in nicotine IVSA. Specifically, higher reinforcement requirements (>FR1) and extended-access sessions (23h) were associated with greater nicotine IVSA in females versus males. Females also displayed higher nicotine intake than males when the experiment included a light cue that signaled nicotine delivery. Sex differences were not influenced by the diurnal phase of testing, dose of nicotine, or prior operant training. CONCLUSION Overall, the results revealed that female rats display higher levels of nicotine IVSA than males, suggesting that the strong reinforcing effects of nicotine promote tobacco use in women.
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44
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Cross SJ, Linker KE, Leslie FM. Sex-dependent effects of nicotine on the developing brain. J Neurosci Res 2017; 95:422-436. [PMID: 27870426 DOI: 10.1002/jnr.23878] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 07/08/2016] [Accepted: 07/14/2016] [Indexed: 02/06/2023]
Abstract
The use of tobacco products represents a major public health concern, especially among women. Epidemiological data have consistently demonstrated that women have less success quitting tobacco use and a higher risk for developing tobacco-related diseases. The deleterious effects of nicotine are not restricted to adulthood, as nicotinic acetylcholine receptors regulate critical aspects of neural development. However, the exact mechanisms underlying the particular sensitivity of women to develop tobacco dependence have not been well elucidated. In this mini-review, we show that gonadal hormone-mediated sexual differentiation of the brain may be an important determinant of sex differences in the effects of nicotine. We highlight direct interactions between sex steroid hormones and ligand-gated ion channels critical for brain maturation, and discuss the extended and profound sexual differentiation of the brain. We emphasize that nicotine exposure during the perinatal and adolescent periods interferes with normal sexual differentiation and can induce long-lasting, sex-dependent alterations in neuronal structure, cognitive and executive function, learning and memory, and reward processing. We stress important age and sex differences in nicotine's effects and emphasize the importance of including these factors in preclinical research that models tobacco dependence. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Sarah J Cross
- Department of Anatomy and Neurobiology, School of Medicine, University of California, Irvine, California
| | - Kay E Linker
- Department of Anatomy and Neurobiology, School of Medicine, University of California, Irvine, California
| | - Frances M Leslie
- Department of Anatomy and Neurobiology, School of Medicine, University of California, Irvine, California.,Department of Pharmacology, School of Medicine, University of California, Irvine, California
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45
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Pogun S, Yararbas G, Nesil T, Kanit L. Sex differences in nicotine preference. J Neurosci Res 2017; 95:148-162. [PMID: 27870459 DOI: 10.1002/jnr.23858] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 06/29/2016] [Accepted: 07/11/2016] [Indexed: 01/01/2023]
Abstract
Smoking is the major cause of preventable deaths worldwide, and although there is a decline in overall smoking prevalence in developed countries, the decline in women is less pronounced than in men. Women become dependent faster and experience greater difficulties in quitting. Similar trends have been observed in animal models of nicotine/tobacco addiction. Individual differences in vulnerability to drug abuse are also observed in nicotine/tobacco addiction and point to the importance of sex differences. This Review, summarizes findings from three experimental approaches used to depict nicotine preference in animal models, intravenous and oral nicotine self-administration and nicotine-induced conditioned place preference. Nicotine preference is considered to be reflected in the animal's motivation to administer the drug (intravenously or orally) or to prefer an environment paired with the presence of the drug (conditioned place preference). These approaches all point to the importance of sex and age of the subjects; the preference of females and adolescents appear to be more pronounced than that of males and adults, respectively. A closer look at these factors will help us understand the mechanisms that underlie nicotine addiction and develop strategies to cope. Ignoring sex differences and reaching conclusions based only on studies using male subjects has resulted in erroneous generalizations in the past. Sex differences in nicotine preference have been clearly documented, and awareness on this aspect of nicotine dependence will significantly impact our success in translational research. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Sakire Pogun
- Center for Brain Research, Ege University, Izmir, Turkey
| | - Gorkem Yararbas
- Institute on Drug Abuse, Toxicology and Pharmaceutical Science, Ege University, Izmir, Turkey
| | - Tanseli Nesil
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, Virginia
| | - Lutfiye Kanit
- Center for Brain Research, Ege University, Izmir, Turkey.,Physiology Department, School of Medicine, Ege University, Izmir, Turkey
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46
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Leventhal AM, Urman R, Barrington-Trimis JL, Goldenson NI, Gallegos K, Chou CP, Wang K, Berhane K, Cruz TB, Pentz MA, Unger J, McConnell RS. Perceived stress and poly-tobacco product use across adolescence: Patterns of association and gender differences. J Psychiatr Res 2017; 94:172-179. [PMID: 28738287 PMCID: PMC5634516 DOI: 10.1016/j.jpsychires.2017.07.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 06/09/2017] [Accepted: 07/13/2017] [Indexed: 10/19/2022]
Abstract
Perceived stress-an endophenotype indicative of the tendency to appraise stress as frequent, unpredictable and unmanageable-is associated with adolescent cigarette smoking. It is unclear whether this association: (1) extends to alternative tobacco products, like electronic cigarettes and hookah (tobacco water pipe), which are increasingly popular among youth, and (2) differs by gender. In this report, data were drawn from a population-based longitudinal cohort of youth in Southern California. Perceived stress was assessed at baseline (7th or 8th grade; 2010). Electronic cigarette, hookah, combustible cigarette, and cigar use were assessed at a 4-year follow-up (11th or 12th grade; 2014). After adjusting for confounders, polytomous logistic regressions showed that a standardized baseline perceived stress score (M = 0, SD = 1) predicted electronic cigarette, hookah, combustible cigarette, and cigar use and a poly-tobacco use index at the 4-year follow-up in the overall sample. Interactions between perceived stress and gender were also observed (Interaction Ps < 0.05), which demonstrated that the association of perceived stress with tobacco product use and poly-use were stronger in females (ORs for current use range: 1.47 to 1.72) than males (ORs range: 0.93 to 1.31). Adjusting for baseline perceived stress, the change in perceived stress from baseline to follow-up was also positively associated with use and poly-use of most tobacco products in females and in males to some extent. In the current era in which teen use of alternative tobacco products is increasingly common, adolescent tobacco use and poly-use research and prevention strategies should address gender-specific origins of tobacco product use risk and consider perceived stress and other emotional endophenotypes in such risk pathways.
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Affiliation(s)
- Adam M Leventhal
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States; Department of Psychology, University of Southern California, Los Angeles, CA, United States.
| | - Robert Urman
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Jessica L Barrington-Trimis
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Nicholas I Goldenson
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Katia Gallegos
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Chih Ping Chou
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Kejia Wang
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Kiros Berhane
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Tess Boley Cruz
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Mary Ann Pentz
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Jennifer Unger
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
| | - Rob S McConnell
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, United States
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47
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Riley AL, Hempel BJ, Clasen MM. Sex as a biological variable: Drug use and abuse. Physiol Behav 2017; 187:79-96. [PMID: 29030249 DOI: 10.1016/j.physbeh.2017.10.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 09/15/2017] [Accepted: 10/07/2017] [Indexed: 01/11/2023]
Abstract
The study of sex as a biological variable is a necessary emphasis across a wide array of endpoints, including basic neuroscience, medicine, mental health, physiology and behavior. The present review summarizes work from clinical and preclinical populations on sex differences in drug use and abuse, ranging from initiation to escalation/dysregulation and from drug cessation/abstinence to relapse. These differences are analyzed in the context of the addiction cycle conceptualization of Koob and his colleagues and address patterns of drug use (binge/intoxication), motivation underlying its use (withdrawal/negative affect) and likelihood and causes of craving and relapse of drug taking (preoccupation/anticipation). Following this overview, an assessment of the basis for the reported sex differences is discussed in the context of the affective (rewarding and aversive) properties of drugs of abuse and how such properties and their balance vary with sex and contribute to drug intake. Finally, the interaction of sex with several experiential (drug history) and subject (age) factors and how these interactions affect reward and aversion are discussed to highlight the importance of understanding such interactions in predicting drug use and abuse. We note that sex as a biological variable remains one of critical evaluation and that such investigations of sex differences in drug use and abuse continue and be expanded to assess all facets of their mediation, including these affective properties, how their balance may be impacted by the multiple conditions under which drugs are taken and how this overall balance affects drug use and addiction vulnerability.
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Affiliation(s)
- Anthony L Riley
- Psychopharmacology Laboratory, Center for Behavioral Neuroscience, American University, 4400 Massachusetts Ave, NW, Washington, D.C. 20016, USA.
| | - Briana J Hempel
- Psychopharmacology Laboratory, Center for Behavioral Neuroscience, American University, 4400 Massachusetts Ave, NW, Washington, D.C. 20016, USA
| | - Matthew M Clasen
- Psychopharmacology Laboratory, Center for Behavioral Neuroscience, American University, 4400 Massachusetts Ave, NW, Washington, D.C. 20016, USA
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48
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Madayag AC, Czarnecki KS, Wangler LM, Robinson DL. Chronic Nicotine Exposure Initiated in Adolescence and Unpaired to Behavioral Context Fails to Enhance Sweetened Ethanol Seeking. Front Behav Neurosci 2017; 11:153. [PMID: 28860980 PMCID: PMC5562684 DOI: 10.3389/fnbeh.2017.00153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Accepted: 08/02/2017] [Indexed: 01/01/2023] Open
Abstract
Nicotine use in adolescence is pervasive in the United States and, according to the Gateway Hypothesis, may lead to progression towards other addictive substances. Given the prevalence of nicotine and ethanol comorbidity, it is difficult to ascertain if nicotine is a gateway drug for ethanol. Our study investigated the relationship between adolescent exposure to nicotine and whether this exposure alters subsequent alcohol seeking behavior. We hypothesized that rats exposed to nicotine beginning in adolescence would exhibit greater alcohol seeking behavior than non-exposed siblings. To test our hypothesis, beginning at P28, female rats were initially exposed to once daily nicotine (0.4 mg/kg, SC) or saline for 5 days. Following these five initial injections, animals were trained to nose-poke for sucrose reinforcement (10%, w/v), gradually increasing to sweetened ethanol (10% sucrose; 10% ethanol, w/v) on an FR5 reinforcement schedule. Nicotine injections were administered after the behavioral sessions to minimize acute effects of nicotine on operant self-administration. We measured the effects of nicotine exposure on the following aspects of ethanol seeking: self-administration, naltrexone (NTX)-induced decreases, habit-directed behavior, motivation, extinction and reinstatement. Nicotine exposure did not alter self-administration or the effectiveness of NTX to reduce alcohol seeking. Nicotine exposure blocked habit-directed ethanol seeking. Finally, nicotine did not alter extinction learning or cue-induced reinstatement to sweetened ethanol seeking. Our findings suggest that nicotine exposure outside the behavioral context does not escalate ethanol seeking. Further, the Gateway Hypothesis likely applies to scenarios in which nicotine is either self-administered or physiologically active during the behavioral session.
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Affiliation(s)
- Aric C Madayag
- Bowles Center for Alcohol Studies, University of North CarolinaChapel Hill, NC, United States.,Department of Pharmacology, University of North CarolinaChapel Hill, NC, United States
| | - Kyle S Czarnecki
- Bowles Center for Alcohol Studies, University of North CarolinaChapel Hill, NC, United States
| | - Lynde M Wangler
- Bowles Center for Alcohol Studies, University of North CarolinaChapel Hill, NC, United States
| | - Donita L Robinson
- Bowles Center for Alcohol Studies, University of North CarolinaChapel Hill, NC, United States.,Department of Psychiatry, University of North CarolinaChapel Hill, NC, United States
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49
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Singh PK, Lutfy K. Nicotine pretreatment reduced cocaine-induced CPP and its reinstatement in a sex- and dose-related manner in adult C57BL/6J mice. Pharmacol Biochem Behav 2017; 159:84-89. [PMID: 28735686 DOI: 10.1016/j.pbb.2017.07.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 11/15/2022]
Abstract
Previous preclinical studies have shown that nicotine pretreatment during adolescence increases the reinforcing actions of cocaine. However, little is known about the effect of prior nicotine administration on cocaine-induced conditioned place preference (CPP) and its reinstatement in adult mice. Besides, little information is available regarding the role of sex in this cross-talk between nicotine and cocaine. Thus, we examined if nicotine administration during adulthood would differentially alter cocaine-induced CPP, its extinction and reinstatement in male versus female mice and if the dose of nicotine was important in this regard. To this end, mice were pretreated with saline or nicotine (0.25 or 1mg/kg; twice daily for seven days) and then tested for place preference before and after single and repeated conditioning with cocaine (15mg/kg). Mice were then exposed to extinction training and tested for reinstatement of CPP. Our results showed that male and female mice pretreated with saline and conditioned with cocaine each exhibited a robust CPP after a single cocaine conditioning. However, this response was blunted in mice pretreated with the lower but not higher dose of nicotine. Female mice pretreated with the lower dose nicotine also failed to show CPP after repeated conditioning. Reinstatement of cocaine-induced CPP was also blunted in these mice compared to their respective controls. Together, these results suggest that nicotine administration during adulthood exerts differential effects on cocaine-induced CPP and its reinstatement in male and female mice and the dose of nicotine is important in this regard.
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Affiliation(s)
- Prableen K Singh
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, 309 East 2nd Street, Pomona, CA 91766, United States
| | - Kabirullah Lutfy
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, 309 East 2nd Street, Pomona, CA 91766, United States.
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50
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Effects of chronic inhalation of electronic cigarettes containing nicotine on glial glutamate transporters and α-7 nicotinic acetylcholine receptor in female CD-1 mice. Prog Neuropsychopharmacol Biol Psychiatry 2017; 77:1-8. [PMID: 28347687 PMCID: PMC5466499 DOI: 10.1016/j.pnpbp.2017.03.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 02/06/2017] [Accepted: 03/23/2017] [Indexed: 01/13/2023]
Abstract
Alteration in glutamate neurotransmission has been found to mediate the development of drug dependence, including nicotine. We and others, through using western blotting, have reported that exposure to drugs of abuse reduced the expression of glutamate transporter-1 (GLT-1) as well as cystine/glutamate antiporter (xCT), which consequently increased extracellular glutamate concentrations in the mesocorticolimbic area. However, our previous studies did not reveal any changes in glutamate/aspartate transporter (GLAST) following exposure to drugs of abuse. In the present study, for the first time, we investigated the effect of chronic exposure to electronic (e)-cigarette vapor containing nicotine, for one hour daily for six months, on GLT-1, xCT, and GLAST expression in frontal cortex (FC), striatum (STR), and hippocampus (HIP) in outbred female CD1 mice. In this study, we also investigated the expression of alpha-7 nicotinic acetylcholine receptor (α-7 nAChR), a major pre-synaptic nicotinic receptor in the glutamatergic neurons, which regulates glutamate release. We found that inhalation of e-cigarette vapor for six months increased α-7 nAChR expression in both FC and STR, but not in the HIP. In addition, chronic e-cigarette exposure reduced GLT-1 expression only in STR. Moreover, e-cigarette vapor inhalation induced downregulation of xCT in both the STR and HIP. We did not find any significant changes in GLAST expression in any brain region. Finally, using liquid chromatography-tandem mass spectrometry (LC-MS/MS) techniques, we detected high concentrations of nicotine and cotinine, a major metabolite of nicotine, in the FC tissues of e-cigarette exposed mice. These data provide novel evidence about the effects of chronic nicotine inhalation on the expression of key glial glutamate transporters as well as α-7 nAChR. Our work may suggest that nicotine exposure via chronic inhalation of e-cigarette vapor may be mediated in part by alterations in the glutamatergic system.
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