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Towers EB, Williams IL, Aristidou ASK, Salako-Akande AO, Lynch WJ. Impact of SMAASH-C, a novel nutritional supplement, on drug-seeking and toxicity in female and male rats. Transl Psychiatry 2024; 14:214. [PMID: 38802366 PMCID: PMC11130171 DOI: 10.1038/s41398-024-02940-w] [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: 09/19/2023] [Revised: 05/14/2024] [Accepted: 05/16/2024] [Indexed: 05/29/2024] Open
Abstract
Relapse to drug use after abstinence is a major challenge in treating substance use disorder. Exposure to drug-associated cues during abstinence can trigger intense craving and precipitate relapse. New and more effective anti-relapse interventions are critically needed, particularly for cocaine use disorder since no effective pharmacological intervention is available. We discovered that a nutritional supplement we developed as part of a nutritional approach for managing patients with substance use disorder reduced patient reports of drug craving and relapse. The goal of this study was to determine the efficacy of this supplement, SMAASH-C, at reducing drug-craving/relapse vulnerability in males and females in rat models with cocaine. Effects were determined following extended-access cocaine self-administration (24-hr/day for 10 days) and a two-week treatment regimen at a moderate and moderate-to-high dose (0.4 and 0.8 g/kg/day) as well as a 6-week regimen at a moderate dose (0.4 g/kg/day; Experiment 2). We also determined its efficacy to offset serum markers of organ toxicity in response to chronic cocaine self-administration and abstinence (aspartate transaminase, alanine transaminase, amylase; urea nitrogen). In females, both the 2- and 6-week SMAASH-C treatment regimens reduced cocaine-seeking (extinction or cue-induced reinstatement), particularly when drug-seeking was heightened (e.g., during estrus). Despite a lack of efficacy to reduce drug-seeking in males, SMAASH-C treatment normalized cocaine/abstinence-induced increases in serum levels of aspartate transaminase and amylase, which are markers of liver and pancreatic toxicity respectively. Thus, the beneficial effects of oral SMAASH-C treatment over abstinence following chronic cocaine self-administration appears to be sex-specific.
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Affiliation(s)
- Eleanor Blair Towers
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA
- Medical Scientist Training Program, University of Virginia, Charlottesville, VA, USA
| | - Ivy L Williams
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA
| | - Ariadne S K Aristidou
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA
| | | | - Wendy J Lynch
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA.
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2
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Baslam A, Kabdy H, Chait Y, Azraida H, El Yazouli L, Aboufatima R, Chait A, Baslam M. Gut Microbiome-Mediated Mechanisms in Alleviating Opioid Addiction with Aqueous Extract of Anacyclus pyrethrum. Biomedicines 2024; 12:1152. [PMID: 38927359 PMCID: PMC11200529 DOI: 10.3390/biomedicines12061152] [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: 04/12/2024] [Revised: 05/20/2024] [Accepted: 05/21/2024] [Indexed: 06/28/2024] Open
Abstract
The escalating rates of morbidity and mortality associated with opioid use disorder (OUD) have spurred a critical need for improved treatment outcomes. This study aimed to investigate the impact of prolonged exposure to Fentanyl, a potent opioid, on behavior, biochemical markers, oxidative stress, and the composition of the gut microbiome. Additionally, we sought to explore the therapeutic potential of Anacyclus pyrethrum in mitigating the adverse effects of Fentanyl withdrawal. The study unveiled that chronic Fentanyl administration induced a withdrawal syndrome characterized by elevated cortisol levels (12.09 mg/mL, compared to 6.3 mg/mL for the control group). This was accompanied by heightened anxiety, indicated by a reduction in time spent and entries made into the open arm in the Elevated Plus Maze Test, as well as depressive-like behaviors, manifested through increased immobility time in the Forced Swim Test. Additionally, Fentanyl exposure correlated with decreased gut microbiome density and diversity, coupled with heightened oxidative stress levels, evidenced by elevated malondialdehyde (MDA) and reduced levels of catalase (CAT) and superoxide dismutase (SOD). However, both post- and co-administration of A. pyrethrum exhibited substantial improvements in these adverse effects, effectively alleviating symptoms associated with OUD withdrawal syndrome and eliciting positive influences on gut microbiota. In conclusion, this research underscores the therapeutic potential of A. pyrethrum in managing Fentanyl withdrawal symptoms. The findings indicate promising effects in alleviating behavioral impairments, reducing stress, restoring gut microbiota, and mitigating oxidative stress, offering valuable insights for addressing the challenges of OUD treatment.
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Affiliation(s)
- Abdelmounaim Baslam
- Laboratory of Pharmacology, Neurobiology, Anthropobiology and Environment, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco; (A.B.); (H.A.)
| | - Hamid Kabdy
- Laboratory of Pharmacology, Neurobiology, Anthropobiology and Environment, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco; (A.B.); (H.A.)
| | - Yassine Chait
- Agadir Souss Massa University Hospital, Faculty of Medicine and Pharmacy, Ibn Zohr University, Agadir 80000, Morocco
| | - Hajar Azraida
- Laboratory of Pharmacology, Neurobiology, Anthropobiology and Environment, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco; (A.B.); (H.A.)
| | - Loubna El Yazouli
- Laboratory of Pharmacology, Neurobiology, Anthropobiology and Environment, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco; (A.B.); (H.A.)
| | - Rachida Aboufatima
- Laboratory of Biological Engineering, Faculty of Sciences and Technology, Sultan Moulay Slimane University, Beni Mellal 23000, Morocco
| | - Abderrahman Chait
- Laboratory of Pharmacology, Neurobiology, Anthropobiology and Environment, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco; (A.B.); (H.A.)
| | - Marouane Baslam
- Center of Agrobiotechnology and Bioengineering, Research Unit Labelled CNRST (Centre AgroBiotech-URL-7 CNRST-05), Cadi Ayyad University, Marrakech 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakech 40000, Morocco
- Laboratory of Biochemistry, Department of Applied Biological Chemistry, Faculty of Agriculture, University of Niigata, Niigata 950-2181, Japan
- GrowSmart, Seoul 07516, Republic of Korea
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3
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Peart DR, Nolan CJ, Stone AP, Williams MA, Karlovcec JM, Murray JE. Disruption of positive- and negative-feature morphine interoceptive occasion setters by dopamine receptor agonism and antagonism in male and female rats. Psychopharmacology (Berl) 2024:10.1007/s00213-024-06584-y. [PMID: 38580732 DOI: 10.1007/s00213-024-06584-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 03/29/2024] [Indexed: 04/07/2024]
Abstract
RATIONALE Internally perceived stimuli evoked by morphine administration can form Pavlovian associations such that they can function as occasion setters (OSs) for externally perceived reward cues in rats, coming to modulate reward-seeking behaviour. Though much research has investigated mechanisms underlying opioid-related reinforcement and analgesia, neurotransmitter systems involved in the functioning of opioids as Pavlovian interoceptive discriminative stimuli remain to be disentangled despite documented differences in the development of tolerance to analgesic versus discriminative stimulus effects. OBJECTIVES Dopamine has been implicated in many opioid-related behaviours, so we aimed to investigate the role of this neurotransmitter in expression of morphine occasion setting. METHODS Male and female rats were assigned to positive- (FP) or negative-feature (FN) groups and received an injection of morphine or saline before each training session. A 15-s white noise conditioned stimulus (CS) was presented 8 times during every training session; offset of this stimulus was followed by 4-s access to liquid sucrose on morphine, but not saline, sessions for FP rats. FN rats learned the reverse contingency. Following stable discrimination, rats began generalization testing for expression of morphine-guided sucrose seeking after systemic pretreatment with different doses of the non-selective dopamine receptor antagonist, flupenthixol, and the non-selective dopamine receptor agonist, apomorphine, combined with training doses of morphine or saline in a Latin-square design. RESULTS The morphine discrimination was acquired under both FP and FN contingencies by males and females. Neither flupenthixol nor apomorphine at any dose substituted for morphine, but both apomorphine and flupenthixol disrupted expression of the morphine OS. This inhibition was specific to sucrose seeking during CS presentations rather than during the period before CS onset and, in the case of apomorphine more so than flupenthixol, to trials on which access to sucrose was anticipated. CONCLUSIONS Our findings lend support to a mechanism of occasion setting involving gating of CS-induced dopamine release rather than by direct dopaminergic modulation by the morphine stimulus.
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Affiliation(s)
- Davin R Peart
- Department of Psychology, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
- Collaborative Neurosciences Graduate Program, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Caitlin J Nolan
- Collaborative Neurosciences Graduate Program, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
- Department of Biomedical Sciences, University of Guelph, Guelph, ON, Canada
| | - Adiia P Stone
- Department of Psychology, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
- Collaborative Neurosciences Graduate Program, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Mckenna A Williams
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, Canada
| | - Jessica M Karlovcec
- Department of Psychology, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
- Collaborative Neurosciences Graduate Program, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Jennifer E Murray
- Department of Psychology, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada.
- Collaborative Neurosciences Graduate Program, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada.
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Pickens CL, Hougham A, Kim J, Wang C, Leder J, Line C, McDaniel K, Micek L, Miller J, Powell K, Waren O, Brenneman E, Erdley B. Impairments in expression of devaluation in a Pavlovian goal-tracking task, but not a free operant devaluation task, after fentanyl exposure in female rats. Behav Brain Res 2024; 458:114761. [PMID: 37977341 PMCID: PMC10842184 DOI: 10.1016/j.bbr.2023.114761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/25/2023] [Accepted: 11/13/2023] [Indexed: 11/19/2023]
Abstract
In laboratory animals, there are numerous demonstrations that past exposure to drugs of abuse can lead to devaluation impairments weeks after the final drug exposure, with the majority of these demonstrations examining effects of exposure to psychostimulants. There has been minimal investigation into whether prior exposure to opiates can lead to devaluation impairments. Here, we first trained female rats that two separate cuelights predicted two different foods and measured Pavlovian goal-tracking responses (Experiment 1) or trained female rats to press two levers to earn two different foods and measured this operant response (Experiment 2). In both experiments, we subsequently gave the rats injections of fentanyl twice daily for 6 days, and then tested rats for conditioned responses after satiation on one of the foods 48-h after the final injection. We found that rats were impaired in the expression of devaluation in the Pavlovian task after fentanyl exposure, but were unimpaired in the expression of devaluation in the operant task. The pattern of results is most consistent with an impairment in lateral orbitofrontal cortex function, but additional research is needed to determine the neurobiological cause of this pattern of results.
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Affiliation(s)
- Charles L Pickens
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA.
| | - Alyssa Hougham
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Jihyeon Kim
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Chuhan Wang
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Jendaya Leder
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Chelsea Line
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Kathleen McDaniel
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Lydia Micek
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Jadyn Miller
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Kendall Powell
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Olivia Waren
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Ellie Brenneman
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Brooke Erdley
- Department of Psychological Sciences, Kansas State University, Manhattan, KS 66506, USA
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Illenberger JM, Flores-Ramirez FJ, Pascasio G, Matzeu A, Martin-Fardon R. Daily treatment with the dual orexin receptor antagonist DORA-12 during oxycodone abstinence decreases oxycodone conditioned reinstatement. Neuropharmacology 2023; 239:109685. [PMID: 37579870 PMCID: PMC10529002 DOI: 10.1016/j.neuropharm.2023.109685] [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: 04/20/2023] [Revised: 08/02/2023] [Accepted: 08/07/2023] [Indexed: 08/16/2023]
Abstract
Chronic opioid use disturbs circadian rhythm and sleep, encouraging opioid use and relapse. The orexin (OX) system is recruited by opioids and regulates physiological processes including sleep. Dual OX receptor antagonists (DORAs), developed for insomnia treatment, may relieve withdrawal-associated sleep disturbances. This study investigated whether DORA-12, a recently developed DORA, reduces physiological activity disturbances during oxycodone abstinence and consequently prevents oxycodone-seeking behavior. Male and female Wistar rats were trained to intravenously self-administer oxycodone (0.15 mg/kg, 21 sessions; 8 h/session) in the presence of a contextual/discriminative stimulus (SD). The rats were subsequently housed individually (22 h/day) to monitor activity, food and water intake. They received DORA-12 (0-30 mg/kg, p.o.) after undergoing daily 1-h extinction training (14 days). After extinction, the rats were tested for oxycodone-seeking behavior elicited by the SD. Hypothalamus sections were processed to assess oxycodone- or DORA-12-associated changes to the OX cell number. In males, oxycodone-associated increases in activity during the light-phase, reinstatement, and decreases in the number of OX cells observed in the vehicle-treated group were not observed with DORA-12-treatment. Oxycodone-associated increases in light-phase food and water intake were not observed by day 14 of 3 mg/kg DORA-12-treatment and dark-phase water intake was increased across treatment days. In females, OX cell number was unaffected by oxycodone or DORA-12. Three and 30 mg/kg DORA-12 increased females' day 7 dark-phase activity and decreased reinstatement. Thirty mg/kg DORA-12 reduced oxycodone-associated increases in light-phase food and water intake. The results suggest that DORA-12 improves oxycodone-induced disruptions to physiological activities and reduces relapse.
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Affiliation(s)
- Jessica M Illenberger
- The Scripps Research Institute, 10550 North Torrey Pines Road, SR-107, La Jolla, CA, 92037, USA.
| | | | - Glenn Pascasio
- The Scripps Research Institute, 10550 North Torrey Pines Road, SR-107, La Jolla, CA, 92037, USA
| | - Alessandra Matzeu
- The Scripps Research Institute, 10550 North Torrey Pines Road, SR-107, La Jolla, CA, 92037, USA
| | - Rémi Martin-Fardon
- The Scripps Research Institute, 10550 North Torrey Pines Road, SR-107, La Jolla, CA, 92037, USA
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Little KM, Kosten TA. Focus on fentanyl in females: Sex and gender differences in the physiological and behavioral effects of fentanyl. Front Neuroendocrinol 2023; 71:101096. [PMID: 37597668 DOI: 10.1016/j.yfrne.2023.101096] [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: 03/30/2023] [Revised: 08/08/2023] [Accepted: 08/16/2023] [Indexed: 08/21/2023]
Abstract
The prevalence of opioid use disorder and overdose continues to harm the U.S. population and is further exacerbated by the use of the synthetic opioid, fentanyl, and its analogs. Gender differences in the effects of fentanyl are not well understood. The present article reviews evidence for gender and sex differences in the physiological and behavioral effects of fentanyl in humans and animals. Biological sex seems to be a foundational driver in addiction vulnerability and affects mechanisms related to opioid use including fentanyl. Fentanyl has distinct pharmacodynamics and enhanced efficacy relative to other opioids that highlights the need to investigate how females may be uniquely altered by its use. Behavioral and physiological responses to fentanyl are found to differ by sex and gender in many cases, including outputs like affective symptoms, analgesia, tolerance, and withdrawal emphasizing the need for further research about the role of biological sex on fentanyl use.
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Affiliation(s)
- Kaitlyn M Little
- Department of Psychology, University of Houston, Houston, TX, United States
| | - Therese A Kosten
- Department of Psychology, University of Houston, Houston, TX, United States.
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7
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Knauss ZT, Hearn CJ, Hendryx NC, Aboalrob FS, Mueller-Figueroa Y, Damron DS, Lewis SJ, Mueller D. Fentanyl-induced reward seeking is sex and dose dependent and is prevented by D-cysteine ethylester. Front Pharmacol 2023; 14:1241578. [PMID: 37795030 PMCID: PMC10546209 DOI: 10.3389/fphar.2023.1241578] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 09/06/2023] [Indexed: 10/06/2023] Open
Abstract
Introduction: Despite their inclination to induce tolerance, addictive states, and respiratory depression, synthetic opioids are among the most effective clinically administered drugs to treat severe acute/chronic pain and induce surgical anesthesia. Current medical interventions for opioid-induced respiratory depression (OIRD), wooden chest syndrome, and opioid use disorder (OUD) show limited efficacy and are marked by low success in the face of highly potent synthetic opioids such as fentanyl. D-Cysteine ethylester (D-CYSee) prevents OIRD and post-treatment withdrawal in male/female rats and mice with minimal effect on analgesic status. However, the potential aversive or rewarding effects of D-CYSee have yet to be fully characterized and its efficacy could be compromised by interactions with opioid-reward pathology. Methods: Using a model of fentanyl-induced conditioned place preference (CPP), this study evaluated 1) the dose and sex dependent effects of fentanyl to induce rewarding states, and 2) the extent to which D-CYSee alters affective state and the acquisition of fentanyl-induced seeking behaviors. Results: Fentanyl reward-related effects were found to be dose and sex dependent. Male rats exhibited a range-bound dose response centered at 5 µg/kg. Female rats exhibited a CPP only at 50 µg/kg. This dose was effective in 25% of females with the remaining 75% showing no significant CPP at any dose. Pretreatment with 100 mg/kg, but not 10 mg/kg, D-CYSee prevented acquisition of fentanyl seeking in males while both doses were effective at preventing acquisition in females. Discussion: These findings suggest that D-CYSee is an effective co-treatment with prescribed opioids to reduce the development of OUD.
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Affiliation(s)
- Zackery T. Knauss
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Caden J. Hearn
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Nathan C. Hendryx
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Fanan S. Aboalrob
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | | | - Derek S. Damron
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Stephen J. Lewis
- Department of Pediatrics, Division of Pulmonology, Allergy, and Immunology, Case Western Reserve University, Cleveland, OH, United States
| | - Devin Mueller
- Department of Biological Sciences, Kent State University, Kent, OH, United States
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8
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Babb JA, Constantino NJ, Kaplan GB, Chartoff EH. Estrous cycle dependent expression of oxycodone conditioned reward in rats. Sci Rep 2023; 13:13946. [PMID: 37626154 PMCID: PMC10457365 DOI: 10.1038/s41598-023-40971-3] [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: 05/03/2023] [Accepted: 08/19/2023] [Indexed: 08/27/2023] Open
Abstract
Oxycodone is one of the most widely prescribed and misused opioid painkillers in the United States. Evidence suggests that biological sex and hormonal status can impact drug reward in humans and rodents, but the extent to which these factors can influence the rewarding effects of oxycodone is unclear. The purpose of this study was to utilize place conditioning to determine the effects of sex and female hormonal status on the expression of oxycodone conditioned reward in rats. Gonadally intact adult Sprague-Dawley male and female rats were used to test: (1) whether both sexes express conditioned reward to oxycodone at similar doses, (2) the impact of conditioning session length on oxycodone conditioned reward expression in both sexes, and (3) the influence of female estrous cycle stage on oxycodone conditioned reward expression. Both sexes expressed conditioned reward at the same doses of oxycodone. Increasing the length of conditioning sessions did not reveal an effect of sex and resulted in lower magnitude conditioned reward expression. Importantly however, female stage of estrous cycle significantly influenced oxycodone conditioned reward expression. These results suggest that female hormonal status can impact the rewarding effects of opioids and thus have important implications for prescription opioid treatment practices.
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Affiliation(s)
- Jessica A Babb
- Research and Mental Health Services, VA Boston Healthcare System, Boston, Massachusetts, USA.
- Department of Psychiatry, Harvard Medical School, Boston, Massachusetts, USA.
| | | | - Gary B Kaplan
- Research and Mental Health Services, VA Boston Healthcare System, Boston, Massachusetts, USA
- Department of Psychiatry, Harvard Medical School, Boston, Massachusetts, USA
- Department of Psychiatry, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Elena H Chartoff
- Department of Psychiatry, Harvard Medical School, Boston, Massachusetts, USA
- Division of Basic Neuroscience, McLean Hospital, Belmont, Massachusetts, USA
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Hinds NM, Wojtas ID, Gallagher CA, Corbett CM, Manvich DF. Effects of sex and estrous cycle on intravenous oxycodone self-administration and the reinstatement of oxycodone-seeking behavior in rats. Front Behav Neurosci 2023; 17:1143373. [PMID: 37465001 PMCID: PMC10350507 DOI: 10.3389/fnbeh.2023.1143373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 06/09/2023] [Indexed: 07/20/2023] Open
Abstract
Introduction The increasing misuse of both prescription and illicit opioids has culminated in a national healthcare crisis in the United States. Oxycodone is among the most widely prescribed and misused opioid pain relievers and has been associated with a high risk for transition to compulsive opioid use. Here, we sought to examine potential sex differences and estrous cycle-dependent effects on the reinforcing efficacy of oxycodone, as well as on stress-induced or cue-induced oxycodone-seeking behavior, using intravenous (IV) oxycodone self-administration and reinstatement procedures. Methods In experiment 1, adult male and female Long-Evans rats were trained to self-administer 0.03 mg/kg/inf oxycodone according to a fixed-ratio 1 schedule of reinforcement in daily 2-h sessions, and a dose-response function was subsequently determined (0.003-0.03 mg/kg/inf). In experiment 2, a separate group of adult male and female Long-Evans rats were trained to self-administer 0.03 mg/kg/inf oxycodone for 8 sessions, followed by 0.01 mg/kg/inf oxycodone for 10 sessions. Responding was then extinguished, followed by sequential footshock-induced and cue-induced reinstatement tests. Results In the dose-response experiment, oxycodone produced a typical inverted U-shape function with 0.01 mg/kg/inf representing the maximally effective dose in both sexes. No sex differences were detected in the reinforcing efficacy of oxycodone. In the second experiment, the reinforcing effects of 0.01-0.03 mg//kg/inf oxycodone were significantly attenuated in females during proestrus/estrus as compared to metestrus/diestrus phases of the estrous cycle. Neither males nor females displayed significant footshock-induced reinstatement of oxycodone seeking, but both sexes exhibited significant cue-induced reinstatement of oxycodone seeking at magnitudes that did not differ either by sex or by estrous cycle phase. Discussion These results confirm and extend previous work suggesting that sex does not robustly influence the primary reinforcing effects of oxycodone nor the reinstatement of oxycodone-seeking behavior. However, our findings reveal for the first time that the reinforcing efficacy of IV oxycodone varies across the estrous cycle in female rats.
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Affiliation(s)
- Nicole M. Hinds
- Graduate School of Biomedical Sciences, Rowan University School of Osteopathic Medicine, Stratford, NJ, United States
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, United States
| | - Ireneusz D. Wojtas
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, United States
| | - Corinne A. Gallagher
- Graduate School of Biomedical Sciences, Rowan University School of Osteopathic Medicine, Stratford, NJ, United States
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, United States
| | - Claire M. Corbett
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, United States
| | - Daniel F. Manvich
- Graduate School of Biomedical Sciences, Rowan University School of Osteopathic Medicine, Stratford, NJ, United States
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, United States
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10
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Barattini AE, Montanari C, Edwards KN, Edwards S, Gilpin NW, Pahng AR. Chronic inflammatory pain promotes place preference for fentanyl in male rats but does not change fentanyl self-administration in male and female rats. Neuropharmacology 2023; 231:109512. [PMID: 36948356 PMCID: PMC10786182 DOI: 10.1016/j.neuropharm.2023.109512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/06/2023] [Accepted: 03/18/2023] [Indexed: 03/24/2023]
Abstract
The current opioid epidemic is a national health crisis marked by skyrocketing reports of opioid misuse and overdose deaths. Despite the risks involved, prescription opioid analgesics are the most powerful and effective medications for treating pain. There is a clear need to investigate the risk of opioid misuse liability in male and female adults experiencing chronic pain. In the present study, we tested the hypothesis that chronic inflammatory pain would increase fentanyl intake, motivation to acquire fentanyl, and drug seeking in the absence of fentanyl in rats. Fentanyl intake, motivation for fentanyl, and drug seeking were tested under limited and extended access conditions using intravenous fentanyl self-administration. Fos activity in ventral tegmental area (VTA) dopamine neurons following intravenous fentanyl challenge (35 μg/kg) was examined using immunohistochemistry. Finally, we tested whether low-dose fentanyl supports development of conditioned place preference under an inflammatory pain state in rats. Contrary to our hypothesis, fentanyl self-administration and VTA Fos activity were unaffected by inflammatory pain status. During acquisition, males exhibited increased fentanyl intake compared to females. Animals given extended access to fentanyl escalated fentanyl intake over time, while animals given limited access did not. Males given extended access to fentanyl demonstrated a greater increase in fentanyl intake over time compared to females. During the dose-response test, females given limited access to fentanyl demonstrated increased motivation to acquire fentanyl compared to males. Both sexes displayed significant increases in responding for fentanyl as unit fentanyl doses were lowered. Following fentanyl challenge, females exhibited higher numbers of Fos-positive non-dopaminergic VTA neurons compared to males. Using conditioned place preference, we found that chronic inflammatory pain promotes fentanyl preference in males, but not females. These findings suggest that established fentanyl self-administration is resistant to change by inflammatory pain manipulation in both sexes, but chronic inflammatory pain increases the rewarding properties of low-dose fentanyl in males.
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Affiliation(s)
- Angela E Barattini
- Department of Physiology, LSU Health Sciences Center, New Orleans, LA, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health Sciences Center, New Orleans, LA, United States; Southeast Louisiana Veterans Health Care System, New Orleans, LA, United States
| | - Christian Montanari
- Department of Physiology, LSU Health Sciences Center, New Orleans, LA, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health Sciences Center, New Orleans, LA, United States; Southeast Louisiana Veterans Health Care System, New Orleans, LA, United States
| | - Kimberly N Edwards
- Department of Physiology, LSU Health Sciences Center, New Orleans, LA, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health Sciences Center, New Orleans, LA, United States
| | - Scott Edwards
- Department of Physiology, LSU Health Sciences Center, New Orleans, LA, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health Sciences Center, New Orleans, LA, United States; Neuroscience Center of Excellence, LSU Health Sciences Center, New Orleans, LA, United States; Comprehensive Alcohol-HIV/AIDS Research Center, LSU Health Sciences Center, New Orleans, LA, United States
| | - Nicholas W Gilpin
- Department of Physiology, LSU Health Sciences Center, New Orleans, LA, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health Sciences Center, New Orleans, LA, United States; Neuroscience Center of Excellence, LSU Health Sciences Center, New Orleans, LA, United States; Southeast Louisiana Veterans Health Care System, New Orleans, LA, United States
| | - Amanda R Pahng
- Department of Physiology, LSU Health Sciences Center, New Orleans, LA, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health Sciences Center, New Orleans, LA, United States; Southeast Louisiana Veterans Health Care System, New Orleans, LA, United States.
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11
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Hinds NM, Wojtas ID, Gallagher CA, Corbett CM, Manvich DF. Effects of sex and estrous cycle on intravenous oxycodone self-administration and the reinstatement of oxycodone-seeking behavior in rats. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.02.543393. [PMID: 37333293 PMCID: PMC10274722 DOI: 10.1101/2023.06.02.543393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
The increasing misuse of both prescription and illicit opioids has culminated in a national healthcare crisis in the United States. Oxycodone is among the most widely prescribed and misused opioid pain relievers and has been associated with a high risk for transition to compulsive opioid use. Here, we sought to examine potential sex differences and estrous cycle-dependent effects on the reinforcing efficacy of oxycodone, as well as on stress-induced or cue-induced oxycodone-seeking behavior, using intravenous (IV) oxycodone self-administration and reinstatement procedures. In experiment 1, adult male and female Long-Evans rats were trained to self-administer 0.03 mg/kg/inf oxycodone according to a fixed-ratio 1 schedule of reinforcement in daily 2-hr sessions, and a dose-response function was subsequently determined (0.003-0.03 mg/kg/inf). In experiment 2, a separate group of adult male and female Long-Evans rats were trained to self-administer 0.03 mg/kg/inf oxycodone for 8 sessions, followed by 0.01 mg/kg/inf oxycodone for 10 sessions. Responding was then extinguished, followed by sequential footshock-induced and cue-induced reinstatement tests. In the dose-response experiment, oxycodone produced a typical inverted U-shape function with 0.01 mg/kg/inf representing the maximally effective dose in both sexes. No sex differences were detected in the reinforcing efficacy of oxycodone. In the second experiment, the reinforcing effects of 0.01-0.03 mg//kg/inf oxycodone were significantly attenuated in females during proestrus/estrus as compared to metestrus/diestrus phases of the estrous cycle. Neither males nor females displayed significant footshock-induced reinstatement of oxycodone seeking, but both sexes exhibited significant cue-induced reinstatement of oxycodone seeking at magnitudes that did not differ either by sex or by estrous cycle phase. These results confirm and extend previous work suggesting that sex does not robustly influence the primary reinforcing effects of oxycodone nor the reinstatement of oxycodone-seeking behavior. However, our findings reveal for the first time that the reinforcing efficacy of IV oxycodone varies across the estrous cycle in female rats.
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Oleinichenko D, Ahn S, Song R, Snutch TP, Phillips AG. Morphine Withdrawal-Induced Hyperalgesia in Models of Acute and Extended Withdrawal Is Attenuated by l-Tetrahydropalmatine. Int J Mol Sci 2023; 24:ijms24108872. [PMID: 37240217 DOI: 10.3390/ijms24108872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/11/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023] Open
Abstract
Effective pain control is an underappreciated aspect of managing opioid withdrawal, and its absence presents a significant barrier to successful opioid detoxification. Accordingly, there is an urgent need for effective non-opioid treatments to facilitate opioid detoxification. l-Tetrahydropalmatine (l-THP) possesses powerful analgesic properties and is an active ingredient in botanical formulations used in Vietnam for the treatment of opioid withdrawal syndrome. In this study, rats receiving morphine (15 mg/kg, i.p.) for 5 days per week displayed a progressive increase in pain thresholds during acute 23 h withdrawal as assessed by an automated Von Frey test. A single dose of l-THP (5 or 7.5 mg/kg, p.o.) administered during the 4th and 5th weeks of morphine treatment significantly improves pain tolerance scores. A 7-day course of l-THP treatment in animals experiencing extended withdrawal significantly attenuates hyperalgesia and reduces the number of days to recovery to baseline pain thresholds by 61% when compared to vehicle-treated controls. This indicates that the efficacy of l-THP on pain perception extends beyond its half-life. As a non-opioid treatment for reversing a significant hyperalgesic state during withdrawal, l-THP may be a valuable addition to the currently limited arsenal of opioid detoxification treatments.
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Affiliation(s)
- Daria Oleinichenko
- Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2A1, Canada
- Djavad Mowafaghian Centre for Brain Research, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Soyon Ahn
- Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2A1, Canada
- Djavad Mowafaghian Centre for Brain Research, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Ru Song
- Djavad Mowafaghian Centre for Brain Research, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Terrance P Snutch
- Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2A1, Canada
- Djavad Mowafaghian Centre for Brain Research, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Anthony G Phillips
- Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2A1, Canada
- Djavad Mowafaghian Centre for Brain Research, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
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13
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Gregoriou GC, Patel SD, Pyne S, Winters BL, Bagley EE. Opioid Withdrawal Abruptly Disrupts Amygdala Circuit Function by Reducing Peptide Actions. J Neurosci 2023; 43:1668-1681. [PMID: 36781220 PMCID: PMC10010477 DOI: 10.1523/jneurosci.1317-22.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 10/18/2022] [Accepted: 11/21/2022] [Indexed: 02/15/2023] Open
Abstract
While the physical signs of opioid withdrawal are most readily observable, withdrawal insidiously drives relapse and contributes to compulsive drug use, by disrupting emotional learning circuits. How these circuits become disrupted during withdrawal is poorly understood. Because amygdala neurons mediate relapse, and are highly opioid sensitive, we hypothesized that opioid withdrawal would induce adaptations in these neurons, opening a window of disrupted emotional learning circuit function. Under normal physiological conditions, synaptic transmission between the basolateral amygdala (BLA) and the neighboring main island (Im) of GABAergic intercalated cells (ITCs) is strongly inhibited by endogenous opioids. Using patch-clamp electrophysiology in brain slices prepared from male rats, we reveal that opioid withdrawal abruptly reduces the ability of these peptides to inhibit neurotransmission, a direct consequence of a protein kinase A (PKA)-driven increase in the synaptic activity of peptidases. Reduced peptide control of neurotransmission in the amygdala shifts the excitatory/inhibitory balance of inputs onto accumbens-projecting amygdala cells involved in relapse. These findings provide novel insights into how peptidases control synaptic activity within the amygdala and presents restoration of endogenous peptide activity during withdrawal as a viable option to mitigate withdrawal-induced disruptions in emotional learning circuits and rescue the relapse behaviors exhibited during opioid withdrawal and beyond into abstinence.SIGNIFICANCE STATEMENT We find that opioid withdrawal dials down inhibitory neuropeptide activity in the amygdala. This disrupts both GABAergic and glutamatergic transmission through amygdala circuits, including reward-related outputs to the nucleus accumbens. This likely disrupts peptide-dependent emotional learning processes in the amygdala during withdrawal and may direct behavior toward compulsive drug use.
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Affiliation(s)
- Gabrielle C Gregoriou
- Sydney Pharmacy School, Faculty of Medicine and Health and Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia, 2111
| | - Sahil D Patel
- Sydney Pharmacy School, Faculty of Medicine and Health and Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia, 2111
| | - Sebastian Pyne
- Sydney Pharmacy School, Faculty of Medicine and Health and Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia, 2111
| | - Bryony L Winters
- Sydney Pharmacy School, Faculty of Medicine and Health and Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia, 2111
| | - Elena E Bagley
- Sydney Pharmacy School, Faculty of Medicine and Health and Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia, 2111
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Towers EB, Setaro B, Lynch WJ. Estradiol Enhances the Development of Addiction-Like Features in a Female Rat Model of Opioid Use Disorder. Neuroendocrinology 2023; 113:1099-1111. [PMID: 36878201 PMCID: PMC10644281 DOI: 10.1159/000529997] [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: 12/16/2022] [Accepted: 02/27/2023] [Indexed: 03/08/2023]
Abstract
INTRODUCTION Women are more vulnerable than men in many aspects of opioid use disorder (OUD); a major theory of sex differences in substance use disorders is that these differences are due to ovarian hormones with estradiol enhancing vulnerability in females. However, most of this evidence is for psychostimulants and alcohol; evidence with opioids is sparse. Thus, the goal of this study was to determine the impact of estradiol on vulnerability in females in a rat model of OUD. METHOD Following self-administration training, ovariectomized (OVX) females with (E) or without (V) estradiol replacement were given extended (24 h/day), intermittent access (2, 5-min trials/h) to fentanyl for 10 days. Then, the development of three key features of OUD were assessed, including physical dependence, defined by the magnitude and time course of weight loss during withdrawal; an enhanced motivation for fentanyl, assessed using a progressive-ratio schedule; and relapse vulnerability, assessed using an extinction/cue-induced reinstatement procedure. These later two characteristics were examined following 14 days of withdrawal when the phenotypes are known to be highly expressed. RESULTS OVX+E females self-administered markedly higher levels of fentanyl under extended, intermittent-access conditions and showed a longer time course of physical dependence, a greater increase in motivation for fentanyl, and an enhanced sensitivity to the reinstating effects of fentanyl-associated cues compared to OVX+V rats. Severe health complications were also observed in OVX+E, but not OVX+V females, during withdrawal. CONCLUSION These results indicate that, as with findings with psychostimulants and alcohol, estradiol enhances vulnerability in females to developing opioid addiction-like features and serious opioid-related health complications.
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Affiliation(s)
- Eleanor Blair Towers
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA
- Medical Scientist Training Program, University of Virginia, Charlottesville, VA, USA
| | - Ben Setaro
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA
| | - Wendy J. Lynch
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA
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15
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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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Raff H, Glaeser BL, Szabo A, Olsen CM, Everson CA. Sleep restriction during opioid abstinence affects the hypothalamic-pituitary-adrenal (HPA) axis in male and female rats. Stress 2023; 26:2185864. [PMID: 36856367 PMCID: PMC10339708 DOI: 10.1080/10253890.2023.2185864] [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: 12/13/2022] [Accepted: 02/23/2023] [Indexed: 03/02/2023] Open
Abstract
Hypothalamic-pituitary-adrenal (HPA) axis dynamics are disrupted by opioids and may be involved in substance abuse; this persists during withdrawal and abstinence and is associated with co-morbid sleep disruption leading to vulnerability to relapse. We hypothesized that chronic sleep restriction (SR) alters the HPA axis diurnal rhythm and the sexually dimorphic response to acute stressor during opioid abstinence. We developed a rat model to evaluate the effect of persistent sleep loss during opioid abstinence on HPA axis dynamics in male and female rats. Plasma ACTH and corticosterone were measured diurnally and in response to acute restraint stress in rats Before (control) compared to During subsequent opioid abstinence without or with SR. Abstinence, regardless of sleep state, led to an increase in plasma ACTH and corticosterone in the morning in males. There was a tendency for higher PM plasma ACTH during abstinence in SR males (p = 0.076). ACTH and corticosterone responses to restraint were reduced in male SR rats whereas there was a failure to achieve the post-restraint nadir in female SR rats. There was no effect of the treatments or interventions on adrenal weight normalized to body weight. SR resulted in a dramatic increase in hypothalamic PVN AVP mRNA and plasma copeptin in male but not female rats. This corresponded to the attenuation of the HPA axis stress response in SR males during opioid abstinence. We have identified a potentially unique, sexually dimorphic role for magnocellular vasopressin in the control of the HPA axis during opioid abstinence and sleep restriction.
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Affiliation(s)
- Hershel Raff
- Department of Medicine (Endocrinology and Molecular Medicine), Surgery, and Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
- Endocrine Research Laboratory, Aurora St. Luke’s Medical Center, Advocate Aurora Research Institute, Milwaukee, Wisconsin, USA
| | - Breanna L. Glaeser
- Department of Pharmacology & Toxicology and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Aniko Szabo
- Division of Biostatistics, Institute for Health & Equity, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Christopher M. Olsen
- Departments of Pharmacology & Toxicology and Neurosurgery, Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Carol A. Everson
- Department of Medicine (Endocrinology and Molecular Medicine) and Cell Biology, Neurobiology & Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
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Opioid replacement therapy with methadone or buprenorphine effects on male mice reproduction. Psychopharmacology (Berl) 2023; 240:77-86. [PMID: 36385208 PMCID: PMC9668397 DOI: 10.1007/s00213-022-06274-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/01/2022] [Indexed: 11/18/2022]
Abstract
RATIONALE Opioid use disorders are commonly treated by long-acting agonist opioids including methadone and buprenorphine which could affect various aspects of male reproduction especially spermatogenesis. OBJECTIVES We aimed to determine whether detoxification with methadone or buprenorphine was associated with reproductive disorders in male mice. METHODS We orally induced morphine dependence in NMRI male mice, and then performed detoxification programs using either methadone or buprenorphine. Testis architecture and sperm parameters including sperm nuclear DNA integrity, mitochondrial activity, oxidative stress in seminal plasma, and routine sperm parameters were assessed to find the involved mechanisms. RESULTS The number of Leydig cells and the thickness of germinal epithelium reduced following morphine use and increased differently after detoxification with methadone or buprenorphine. Morphine dependence and detoxification with methadone and buprenorphine had different effects on sperm parameters. Morphine altered chromatin integrity, mitochondrial activity, and oxidative stress in sperm. Detoxification with methadone improved mitochondrial activity but worsened chromatin integrity, whereas detoxification with buprenorphine improved neither chromatin integrity nor mitochondrial activity. Seminal plasma oxidative stress was higher in the treated groups compared to control groups but was comparable among treatment groups. Our study revealed that long-term morphine use followed by detoxification with methadone or buprenorphine impairs testis structure and sperm parameters. Detoxification from morphine use with methadone and buprenorphine led to different preclinical outcomes in semen quality parameters, including chromatin integrity. Therefore, clinical detoxification protocols should be performed more cautiously, considering the desire of the individuals to reproduce.
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Guha SK, Alonso-Caraballo Y, Driscoll GS, Babb JA, Neal M, Constantino NJ, Lintz T, Kinard E, Chartoff EH. Ranking the contribution of behavioral measures comprising oxycodone self-administration to reinstatement of drug-seeking in male and female rats. Front Behav Neurosci 2022; 16:1035350. [PMID: 36505730 PMCID: PMC9731098 DOI: 10.3389/fnbeh.2022.1035350] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 11/04/2022] [Indexed: 11/26/2022] Open
Abstract
Introduction Rates of relapse to drug use during abstinence are among the highest for opioid use disorder (OUD). In preclinical studies, reinstatement to drug-seeking has been extensively studied as a model of relapse-but the work has been primarily in males. We asked whether biological sex contributes to behaviors comprising self-administration of the prescription opioid oxycodone in rats, and we calculated the relative contribution of these behavioral measures to reinstatement in male and female rats. Materials and methods Rats were trained to self-administer oxycodone (8 days, training phase), after which we examined oxycodone self-administration behaviors for an additional 14 days under three conditions in male and female rats: short access (ShA, 1 h/d), long access (LgA, 6 h/d), and saline self-administration. All rats were then tested for cue-induced reinstatement of drug-seeking after a 14-d forced abstinence period. We quantified the # of infusions, front-loading of drug intake, non-reinforced lever pressing, inter-infusion intervals, escalation of intake, and reinstatement responding on the active lever. Results Both male and female rats in LgA and ShA conditions escalated oxycodone intake to a similar extent. However, males had higher levels of non-reinforced responding than females under LgA conditions, and females had greater levels of reinstatement responding than males. We then correlated each addiction-related measure listed above with reinstatement responding in males and females and ranked their respective relative contributions. Although the majority of behavioral measures associated with oxycodone self-administration did not show sex differences on their own, when analyzed together using partial least squares regression, their relative contributions to reinstatement were sex-dependent. Front-loading behavior was calculated to have the highest relative contribution to reinstatement in both sexes, with long and short inter-infusion intervals having the second greatest contribution in females and males, respectively. Discussion Our results demonstrate sex differences in some oxycodone self-administration measures. More importantly, we demonstrate that a sex- dependent constellation of self-administration behaviors can predict the magnitude of reinstatement, which holds great promise for relapse prevention in people.
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Affiliation(s)
- Suman K. Guha
- Basic Neuroscience Division, McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, United States
| | - Yanaira Alonso-Caraballo
- Basic Neuroscience Division, McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, United States
| | - Gillian S. Driscoll
- Basic Neuroscience Division, McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, United States
| | - Jessica A. Babb
- Research Service, VA Boston Healthcare System, Department of Psychiatry, Harvard Medical School, Boston, MA, United States
| | - Megan Neal
- Basic Neuroscience Division, McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, United States
| | - Nicholas J. Constantino
- Basic Neuroscience Division, McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, United States
| | - Tania Lintz
- Basic Neuroscience Division, McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, United States
| | - Elizabeth Kinard
- Basic Neuroscience Division, McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, United States
| | - Elena H. Chartoff
- Basic Neuroscience Division, McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, United States,*Correspondence: Elena H. Chartoff,
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Lynch WJ, Bakhti-Suroosh A, Abel JM. Impact of high-access exercise prior to and during early adolescence on later vulnerability to opioid use and relapse in male rats. Transl Psychiatry 2022; 12:425. [PMID: 36192388 PMCID: PMC9529880 DOI: 10.1038/s41398-022-02180-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 09/07/2022] [Accepted: 09/13/2022] [Indexed: 11/15/2022] Open
Abstract
Middle- and high-school athletes participating in certain team sports are at greater risk of opioid misuse and addiction than those who do not. While this risk is thought to be due to increased access to opioids, in this study we explored the possibility that the sensitizing effects of discontinued high-intensity exercise may also contribute. Specifically, using male rat models with fentanyl, we tested the hypothesis that high-access exercise (24 h/day access to a running wheel) during pre/early adolescence (two weeks, postnatal-day 24-37) would enhance vulnerability to opioid use and relapse during late adolescence/adulthood. Rats with a history of high-access exercise showed stronger fentanyl-associated lever discrimination during acquisition, greater motivation to obtain infusions of fentanyl following acquisition, and had an enhanced sensitivity to the reinstating effects of fentanyl-associated cues following extended (24 h/day), intermittent-access self-administration and protracted abstinence (14 days) compared to sedentary controls. In contrast, sedentary rats had greater overall responding (active- and inactive-lever) during acquisition and greater non-specific (inactive-lever) responding during extended-access self-administration. Molecular markers associated with opioid seeking/relapse were also differentially expressed in the nucleus accumbens core of rats with versus without a history of high-access exercise following relapse testing (e.g., Bdnf-IV and Drd2 expression). Together, these findings demonstrate that high-access exercise prior to and throughout early-adolescence enhances vulnerability to the reinforcing and cue-induced reinstating effects of opioids during later adolescence/adulthood. Thus, it is possible that the discontinuation of high intensity exercise contributes to the enhanced vulnerability observed in middle- and high-school athletes.
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Affiliation(s)
- Wendy J Lynch
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, 22904, USA.
| | - Anousheh Bakhti-Suroosh
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, 22904, USA
| | - Jean M Abel
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, 22904, USA
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20
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Towers EB, Setaro B, Lynch WJ. Sex- and Dose-Dependent Differences in the Development of an Addiction-Like Phenotype Following Extended-Access Fentanyl Self-Administration. Front Pharmacol 2022; 13:841873. [PMID: 35370634 PMCID: PMC8968863 DOI: 10.3389/fphar.2022.841873] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 01/24/2022] [Indexed: 12/26/2022] Open
Abstract
Opioid use disorder (OUD) is a major epidemic in the United States, and fentanyl is a major culprit. The National Institute on Drug Abuse has highlighted an urgent need for research on the risks and outcomes of OUD with fentanyl; a better understanding of sex/gender differences is also critically needed given that the opioid epidemic has been particularly impactful on women. In response to this need, we developed a rat model of OUD with fentanyl and showed that sex impacts relapse vulnerability following extended-access self-administration under a low fentanyl dose. Here, our goal was to determine sex differences across a broad dose range, including high doses expected to maximize the expression of addiction-like features (e.g., vulnerability to relapse and physical dependence). Male and female rats were assigned to self-administer one of four fentanyl doses (0.25, 0.75, 1.5, and 3.0 µg/kg/infusion), and once they acquired, they were given extended (24-h/day), intermittent access (2, 5 min trials/h, fixed-ratio 1) to fentanyl for 10 days. Physical dependence (spontaneous weight loss) was assessed during early withdrawal, and relapse vulnerability was assessed on withdrawal day 15 using an extinction/cue-induced reinstatement procedure. Despite markedly higher intake in the high- versus low-dose groups, each group responded similarly during relapse testing (extinction and cue-induced reinstatement). However, number of infusions, or frequency of use, during extended access was predictive of later vulnerability to relapse, whereas total intake impacted physical dependence given that weight loss only occurred following the discontinuation of fentanyl self-administration at the three highest doses. Females self-administered more fentanyl each day and within each binge (active trial), and had longer lasting weight loss during withdrawal than males. Relapse vulnerability was also higher in females than males and highest in females tested during estrus. These findings indicate that sex is an important risk factor for patterns and levels of fentanyl intake, relapse, and physical dependence, and while fentanyl intake predicts physical dependence, frequency of use predicts relapse.
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Affiliation(s)
- Eleanor Blair Towers
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, United States
| | - Ben Setaro
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, United States
| | - Wendy J Lynch
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, United States
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21
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Nicolas C, Zlebnik NE, Farokhnia M, Leggio L, Ikemoto S, Shaham Y. Sex Differences in Opioid and Psychostimulant Craving and Relapse: A Critical Review. Pharmacol Rev 2022; 74:119-140. [PMID: 34987089 PMCID: PMC11060335 DOI: 10.1124/pharmrev.121.000367] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 08/15/2021] [Indexed: 01/11/2023] Open
Abstract
A widely held dogma in the preclinical addiction field is that females are more vulnerable than males to drug craving and relapse. Here, we first review clinical studies on sex differences in psychostimulant and opioid craving and relapse. Next, we review preclinical studies on sex differences in psychostimulant and opioid reinstatement of drug seeking after extinction of drug self-administration, and incubation of drug craving (time-dependent increase in drug seeking during abstinence). We also discuss ovarian hormones' role in relapse and craving in humans and animal models and speculate on brain mechanisms underlying their role in cocaine craving and relapse in rodent models. Finally, we discuss imaging studies on brain responses to cocaine cues and stress in men and women.The results of the clinical studies reviewed do not appear to support the notion that women are more vulnerable to psychostimulant and opioid craving and relapse. However, this conclusion is tentative because most of the studies reviewed were correlational, not sufficiently powered, and not a priori designed to detect sex differences. Additionally, imaging studies suggest sex differences in brain responses to cocaine cues and stress. The results of the preclinical studies reviewed provide evidence for sex differences in stress-induced reinstatement and incubation of cocaine craving but not cue- or cocaine-induced reinstatement of cocaine seeking. These sex differences are modulated in part by ovarian hormones. In contrast, the available data do not support the notion of sex differences in craving and relapse/reinstatement for methamphetamine or opioids in rodent models. SIGNIFICANCE STATEMENT: This systematic review summarizes clinical and preclinical studies on sex differences in psychostimulant and opioid craving and relapse. Results of the clinical studies reviewed do not appear to support the notion that women are more vulnerable to psychostimulant and opioid craving and relapse. Results of preclinical studies reviewed provide evidence for sex differences in reinstatement and incubation of cocaine seeking but not for reinstatement or incubation of methamphetamine or opioid seeking.
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Affiliation(s)
- Céline Nicolas
- Neurocentre Magendie, University of Bordeaux, Bordeaux, France (C.N.); Department of Anatomy & Neurobiology, University of Maryland School of Medicine, Baltimore, MD, Present address: Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, CA (N.E.Z.); Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD (M.F., L.L., S.I., Y.S.); and Division of Intramural Clinical and Biological Research, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD (M.F., L.L.)
| | - Natalie E Zlebnik
- Neurocentre Magendie, University of Bordeaux, Bordeaux, France (C.N.); Department of Anatomy & Neurobiology, University of Maryland School of Medicine, Baltimore, MD, Present address: Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, CA (N.E.Z.); Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD (M.F., L.L., S.I., Y.S.); and Division of Intramural Clinical and Biological Research, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD (M.F., L.L.)
| | - Mehdi Farokhnia
- Neurocentre Magendie, University of Bordeaux, Bordeaux, France (C.N.); Department of Anatomy & Neurobiology, University of Maryland School of Medicine, Baltimore, MD, Present address: Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, CA (N.E.Z.); Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD (M.F., L.L., S.I., Y.S.); and Division of Intramural Clinical and Biological Research, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD (M.F., L.L.)
| | - Lorenzo Leggio
- Neurocentre Magendie, University of Bordeaux, Bordeaux, France (C.N.); Department of Anatomy & Neurobiology, University of Maryland School of Medicine, Baltimore, MD, Present address: Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, CA (N.E.Z.); Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD (M.F., L.L., S.I., Y.S.); and Division of Intramural Clinical and Biological Research, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD (M.F., L.L.)
| | - Satoshi Ikemoto
- Neurocentre Magendie, University of Bordeaux, Bordeaux, France (C.N.); Department of Anatomy & Neurobiology, University of Maryland School of Medicine, Baltimore, MD, Present address: Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, CA (N.E.Z.); Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD (M.F., L.L., S.I., Y.S.); and Division of Intramural Clinical and Biological Research, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD (M.F., L.L.)
| | - Yavin Shaham
- Neurocentre Magendie, University of Bordeaux, Bordeaux, France (C.N.); Department of Anatomy & Neurobiology, University of Maryland School of Medicine, Baltimore, MD, Present address: Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, CA (N.E.Z.); Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD (M.F., L.L., S.I., Y.S.); and Division of Intramural Clinical and Biological Research, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD (M.F., L.L.)
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22
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Gaulden AD, Burson N, Sadik N, Ghosh I, Khan S, Brummelte S, Kallakuri S, Perrine SA. Effects of fentanyl on acute locomotor activity, behavioral sensitization, and contextual reward in female and male rats. Drug Alcohol Depend 2021; 229:109101. [PMID: 34628096 PMCID: PMC8671359 DOI: 10.1016/j.drugalcdep.2021.109101] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 09/05/2021] [Accepted: 09/20/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND Although fentanyl has gained widespread prominence, there remains a lack of knowledge on this opioid synthetic agonist, particularly related to sex effects. Therefore, we conducted behavioral tests in female and male rats to measure drug abuse-related responses to fentanyl hypothesizing sex-specific responses. METHODS Using female and male rats, we measured the effects of acute or repeated administration of fentanyl (20 μg/kg) on locomotor activity (LMA) and behavioral sensitization in an open field test. We further measured contextual-reward and associated locomotor activity during training in a conditioned place preference (CPP) paradigm using a low (4 μg/kg) or high (16 μg/kg) dose of fentanyl. Vaginal lavage samples were collected from female rats in the CPP study, and the estrous phase was determined based on the cytological characterization. RESULTS Female, but not male, rats showed elevated LMA in response to acute fentanyl and behavioral sensitization to repeated administration of fentanyl. Fentanyl produced significant CPP in both sexes, but it was more potent in males. Finally, our secondary investigation of the estrous cycle on fentanyl-CPP suggests that non-estrus phases, likely reflecting high estradiol, may predict the degree of fentanyl preference in females. CONCLUSIONS Fentanyl was more potent and/or effective to produce LMA and LMA sensitization in females but more potent to produce CPP in males. Furthermore, the role of sex in fentanyl responses varied across endpoints, and sex differences in LMA were not predictive of sex differences in CPP.
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Affiliation(s)
- Andrew D. Gaulden
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI.,Translational Neuroscience Program, Wayne State University School of Medicine, Detroit, MI
| | - Nicole Burson
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI
| | - Nareen Sadik
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI.,Research Services, John D. Dingell VA Medical Center, Detroit, MI
| | - Ishita Ghosh
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI
| | - Sabrina Khan
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI
| | - Susanne Brummelte
- Translational Neuroscience Program, Wayne State University School of Medicine, Detroit, MI.,Department of Psychology, Wayne State University, Detroit, MI
| | - Srinivasu Kallakuri
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI.,Research Services, John D. Dingell VA Medical Center, Detroit, MI
| | - Shane A. Perrine
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI.,Translational Neuroscience Program, Wayne State University School of Medicine, Detroit, MI.,Research Services, John D. Dingell VA Medical Center, Detroit, MI
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23
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Azzam AAH, Lambert DG. Preclinical Discovery and Development of oliceridine (Olinvyk®) for the Treatment of Post-Operative Pain. Expert Opin Drug Discov 2021; 17:215-223. [PMID: 34817313 DOI: 10.1080/17460441.2022.2008903] [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] [Indexed: 01/30/2023]
Abstract
INTRODUCTION Opioids acting at the MOP(mu:µ) receptor produce analgesia but also side-effects. There is debate suggesting opioid receptors produce analgesia via G-protein and side-effects via β-arrestin-2 pathways. Opioids targeting G-proteins over the arrestins (bias) offer potential therapeutic advantages. Oliceridine is a putative MOP, G-protein biased agonist. AREAS COVERED Oliceridine is selective for MOP receptors with greater activity at G-proteins over arrestins. A substantial body of evidence now points to a simpler pharmacological descriptor of partial agonist. Pre-clinical in vivo data indicates a robust antinociceptive response of shorter duration than morphine. Apollo trials (Phase-III RCT-bunionectomy/abdominoplasty) describe good analgesic efficacy that was non-inferior to morphine with good tolerability and side-effect profile. There is evidence for improved respiratory safety profile. Oliceridine is approved by the FDA. EXPERT OPINION Oliceridine will be an important addition to the clinical armamentarium for use for the management of acute pain severe enough to require an intravenous opioid analgesic and for whom alternative treatments are inadequate. Respiratory advantage and the possibility of reduced abuse potential are possible advantages over the use of traditional opioids. Based on a number of excellent, highly detailed studies, oliceridine should be described as a partial agonist; this 'label' does not matter.
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Affiliation(s)
- Ammar A H Azzam
- Department of Cardiovascular Sciences, University of Leicester, Anaesthesia, Critical Care and Pain Management, Hodgkin Building, Leicester, LE1 9HN. UK
| | - David G Lambert
- Department of Cardiovascular Sciences, University of Leicester, Anaesthesia, Critical Care and Pain Management, Hodgkin Building, Leicester, LE1 9HN. UK
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24
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Timmerman BM, Mooney-Leber SM, Brummelte S. The effects of neonatal procedural pain and maternal isolation on hippocampal cell proliferation and reelin concentration in neonatal and adult male and female rats. Dev Psychobiol 2021; 63:e22212. [PMID: 34813104 DOI: 10.1002/dev.22212] [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: 04/05/2021] [Revised: 10/04/2021] [Accepted: 10/13/2021] [Indexed: 11/11/2022]
Abstract
Preterm births accounted for over 10% of all U.S. live births in 2019 and the rate is rising. Neonatal stressors, especially procedural pain, experienced by preterm infants in the neonatal intensive care unit (NICU) have been associated with neurodevelopmental impairments. Parental care can alleviate stress during stressful or painful procedures; however, infants in the NICU often receive reduced parental care compared with their peers. Animal studies suggest that decreased maternal care similarly impairs neurodevelopment but also influences the effects of neonatal pain. It is important to mimic both stressors in animal models of neonatal stress exposure. In this study, researchers investigated the individual and combined impact of neonatal pain and maternal isolation on reelin protein levels and cellular proliferation in the hippocampal dentate gyrus of 8 days old and adult rats. Exposure to either stressor individually, but not both, increased reelin levels in the dentate gyrus of adult females without significantly altering reelin levels in adult males. However, cell proliferation levels at either age were unaffected by the early-life stressors. These results suggest that each early-life stressor has a unique effect on markers of brain development and more research is needed to further investigate their distinct influences.
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Affiliation(s)
- Brian M Timmerman
- Department of Psychology, Wayne State University, Detroit, Michigan, USA
| | - Sean M Mooney-Leber
- Department of Psychology, University of Wisconsin-Stevens Points, Stevens Point, Wisconsin, USA
| | - Susanne Brummelte
- Department of Psychology, Wayne State University, Detroit, Michigan, USA.,Translational Neuroscience Program, Wayne State University, Detroit, Michigan, USA
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25
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Towers EB, Lynch WJ. The importance of examining sex differences in animal models validated to induce an addiction-like phenotype. Pharmacol Biochem Behav 2021; 209:173255. [PMID: 34416219 PMCID: PMC8456716 DOI: 10.1016/j.pbb.2021.173255] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 08/11/2021] [Indexed: 11/22/2022]
Affiliation(s)
- Eleanor Blair Towers
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, United States of America.
| | - Wendy J Lynch
- Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, United States of America
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26
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Bossert JM, Townsend EA, Altidor LKP, Fredriksson I, Shekara A, Husbands S, Sulima A, Rice KC, Banks ML, Shaham Y. Sex differences in the effect of chronic delivery of the buprenorphine analogue BU08028 on heroin relapse and choice in a rat model of opioid maintenance. Br J Pharmacol 2021; 179:227-241. [PMID: 34505281 DOI: 10.1111/bph.15679] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND AND PURPOSE Maintenance treatment with opioid agonists (buprenorphine, methadone) decreases opioid use and relapse. We recently modelled maintenance treatment in rats and found that chronic delivery of buprenorphine or the μ opioid receptor partial agonist TRV130 decreased relapse to oxycodone seeking and taking. Here, we tested the buprenorphine analogue BU08028 on different heroin relapse-related measures and heroin versus food choice. EXPERIMENTAL APPROACH For relapse assessment, we trained male and female rats to self-administer heroin (6 h·day-1 , 14 days) in Context A and then implanted osmotic minipumps containing BU08028 (0, 0.03 or 0.1 mg·kg-1 ·d-1 ). Effects of chronic BU08028 delivery were tested on (1) incubation of heroin-seeking in a non-drug Context B, (2) extinction responding reinforced by heroin-associated discrete cues in Context B, (3) reinstatement of heroin-seeking induced by re-exposure to Context A and (4) re-acquisition of heroin self-administration in Context A. For choice assessment, we tested the effect of chronic BU08028 delivery on heroin versus food choice. KEY RESULTS Chronic BU08028 delivery decreased incubation of heroin seeking. Unexpectedly, BU08028 increased re-acquisition of heroin self-administration selectively in females. Chronic BU08028 had minimal effects on context-induced reinstatement and heroin versus food choice in both sexes. Finally, exploratory post hoc analyses suggest that BU08028 decreased extinction responding selectively in males. CONCLUSIONS AND IMPLICATIONS Chronic BU08028 delivery had both beneficial and detrimental, sex-dependent, effects on different triggers of heroin relapse and minimal effects on heroin choice in both sexes. Results suggest that BU08028 would not be an effective opioid maintenance treatment in humans.
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Affiliation(s)
| | - E Andrew Townsend
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, Virginia, USA
| | | | - Ida Fredriksson
- Behavioral Neuroscience Branch, IRP/NIDA/NIH, Baltimore, Maryland, USA
| | - Aniruddha Shekara
- Behavioral Neuroscience Branch, IRP/NIDA/NIH, Baltimore, Maryland, USA
| | - Stephen Husbands
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
| | - Agnieszka Sulima
- Molecular Targets and Medications Discovery Branch, IRP/NIDA/NIH, Baltimore, Maryland, USA.,Chemical Biology Research Branch, IRP/NIAAA/NIH, Rockville, Maryland, USA
| | - Kenner C Rice
- Molecular Targets and Medications Discovery Branch, IRP/NIDA/NIH, Baltimore, Maryland, USA.,Chemical Biology Research Branch, IRP/NIAAA/NIH, Rockville, Maryland, USA
| | - Matthew L Banks
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Yavin Shaham
- Behavioral Neuroscience Branch, IRP/NIDA/NIH, Baltimore, Maryland, USA
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27
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Townsend EA, Kim RK, Robinson HL, Marsh SA, Banks ML, Hamilton PJ. Opioid withdrawal produces sex-specific effects on fentanyl-vs.-food choice and mesolimbic transcription. BIOLOGICAL PSYCHIATRY GLOBAL OPEN SCIENCE 2021; 1:112-122. [PMID: 34458885 DOI: 10.1016/j.bpsgos.2021.04.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Background Opioid withdrawal is a key driver of opioid addiction and an obstacle to recovery. However, withdrawal effects on opioid reinforcement and mesolimbic neuroadaptation are understudied and the role of sex is largely unknown. Methods Male (n=13) and female (n=12) rats responded under a fentanyl-vs.-food "choice" procedure during daily 2h sessions. In addition to the daily choice sessions, rats were provided extended access to fentanyl during 12h self-administration sessions. After two weeks of this self-administration regimen, the nucleus accumbens (NAc) and ventral tegmental area (VTA) of a subset of rats were subjected to RNA sequencing. In the remaining rats, a third week of this self-administration regimen was conducted, during which methadone effects on fentanyl-vs.-food choice were determined. Results Prior to opioid dependence, male and female rats similarly allocated responding between fentanyl and food. Abstinence from extended fentanyl access elicited similar increases in somatic withdrawal signs in both sexes. Despite similar withdrawal signs and extended access fentanyl intake, opioid withdrawal was accompanied by a maladaptive increase in fentanyl choice in males, but not females. Behavioral sex differences corresponded with a greater number of differentially expressed genes in the NAc and VTA of opioid-withdrawn females relative to males. Methadone blocked withdrawal-associated increases in fentanyl choice in males, but failed to further decrease fentanyl choice in females. Conclusions These results provide foundational evidence of sex-specific neuroadaptations to opioid withdrawal, which may be relevant to the female-specific resilience to withdrawal-associated increases in opioid choice and aid in the identification of novel therapeutic targets.
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Affiliation(s)
- E Andrew Townsend
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - R Kijoon Kim
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - Hannah L Robinson
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - Samuel A Marsh
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - Matthew L Banks
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - Peter J Hamilton
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
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28
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Doyle MR, Sulima A, Rice KC, Collins GT. Influence of Contingent and Noncontingent Drug Histories on the Development of High Levels of MDPV Self-Administration. J Pharmacol Exp Ther 2021; 379:108-116. [PMID: 34413199 DOI: 10.1124/jpet.121.000655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 08/16/2021] [Indexed: 11/22/2022] Open
Abstract
A subset of rats that self-administer 3,4-methylenedioxypyrovalerone (MDPV) develop unusually high levels of drug taking. A history of responding maintained by cocaine, but not food, prevents the development of this high-responder phenotype; however, it is unclear how histories of noncontingent cocaine exposure or self-administering drugs from other pharmacological classes would affect its development. In the current studies, 5 groups of male Sprague-Dawley rats were used to determine whether histories of responding maintained by drugs from different pharmacological classes (e.g., MDPV, cocaine, fentanyl, nicotine, or ketamine) would differentially impact the development of the high-responder phenotype when MDPV was available for self-administration. Two additional groups were used to determine whether noncontingent exposure to cocaine would prevent the development of the high-responder phenotype when MDPV was available for self-administration, and whether noncontingent exposure to MDPV would facilitate the development of the high-responder phenotype when cocaine was available for self-administration. Consistent with previous reports, a history of response-contingent cocaine, and to a lesser extent noncontingent cocaine, prevented the MDPV high-responder phenotype; however, when responding was initially maintained by fentanyl, nicotine, or ketamine, the MDPV high-responder phenotype developed in ∼45% of rats. By manipulating behavioral and pharmacological histories prior to evaluating MDPV self-administration, the current studies provide additional evidence that a history of response-contingent (or noncontingent) cocaine can prevent the transition from well regulated to aberrant drug-taking when responding is maintained by MDPV. Although the mechanism(s) that underlies this novel high-responder phenotype are unknown, elucidation may provide insight into individual differences relating to substance use disorder. SIGNIFICANCE STATEMENT: A subset of outbred Sprague-Dawley rats self-administer high levels of the synthetic cathinone 3,4-methylenedioxypyrovalerone (MDPV). Understanding the behavioral and/or pharmacological factors that can prevent the development of dysregulated MDPV self-administration may provide insight into individual differences in vulnerability to develop a substance use disorder.
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Affiliation(s)
- Michelle R Doyle
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, NIDA and NIAAA, Bethesda, Maryland (A.S., K.C.R.)
| | - Agnieszka Sulima
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, NIDA and NIAAA, Bethesda, Maryland (A.S., K.C.R.)
| | - Kenner C Rice
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, NIDA and NIAAA, Bethesda, Maryland (A.S., K.C.R.)
| | - Gregory T Collins
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, NIDA and NIAAA, Bethesda, Maryland (A.S., K.C.R.)
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