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Ye L, Li C, Jiang W, Yang Y, Wang W, Zhu H, Hu Z, Li N, Cen X, Wang H, Tian J. Subacute toxicity evaluations of LPM3480392 in rats, a full µ-opioid receptor biased agonist. Front Pharmacol 2023; 14:1218380. [PMID: 37601058 PMCID: PMC10436550 DOI: 10.3389/fphar.2023.1218380] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 07/20/2023] [Indexed: 08/22/2023] Open
Abstract
Opiates produce analgesia via G-protein signaling, and adverse effects, such as respiratory depression and decreased bowel motility, by β-arrestin pathway. Oliceridine, a G protein-biased MOR agonist, only presents modest safety advantages as compared to other opiates in clinical trials, possibly due to its limited bias. Our previous study shown that LPM3480392, a full MOR biased agonist, is selective for the Gi pathway over the β-arrestin-2. In the present article, we evaluated the subacute toxicity of LPM3480392 in rats. The rats were administered with control article or LPM3480392 0.6, 1.2 or 2.4 mg/kg/day for 4 consecutive weeks followed by a 4-week recovery phase. Intravenous infusion was conducted at tail vein at 0.2, 0.4 or 0.8 mg/kg/day with a dosing volume of 10 mL/kg and 5 min/rat/dose, three times a day with an interval of approximately 4 h. The concomitant toxicokinetics study was conducted. Two unscheduled rats at 2.4 mg/kg/day died with no clear cause. For the scheduled necropsy, the major effects were associated with the MOR agonist-related pharmacodynamic properties of LPM3480392 (e.g., increased activity, increased muscle tone; decreased food consumption and body weight gain; and clinical chemistry changes related with decreased food consumption) in three LPM3480392 groups. In addition, LPM3480392 at 2.4 mg/kg/day also induced deep respiration and histopathology changes in testis and epididymis in sporadic individual rats. However, different from other opiates, LPM3480392 presents weak/no immunosuppression and the decreased adrenal gland weight, which may be due to LPM3480392' full MOR bias. At the end of recovery phase, all findings were recovered to some extent or completely. In the toxicokinetics study, the dose-dependent elevation of drug exposure was observed, which partly explained the toxicity of high dose. In summary, LPM3480392 has exhibited good safety characteristics in this subacute toxicity study in rats.
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Affiliation(s)
- Liang Ye
- School of Public Health and Management, Binzhou Medical University, Yantai, Shandong, China
| | - Chunmei Li
- Key Laboratory of Molecular Pharmacology and Drug Evaluation, School of Pharmacy, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, Shandong, China
| | - Wanglin Jiang
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Yifei Yang
- Key Laboratory of Molecular Pharmacology and Drug Evaluation, School of Pharmacy, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, Shandong, China
| | - Wenyan Wang
- Key Laboratory of Molecular Pharmacology and Drug Evaluation, School of Pharmacy, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, Shandong, China
| | - Haibo Zhu
- School of Public Health and Management, Binzhou Medical University, Yantai, Shandong, China
| | - Zhengping Hu
- Medicine and Pharmacy Research Center, Binzhou Medical University, Yantai, Shandong, China
| | - Ning Li
- School of Public Health and Management, Binzhou Medical University, Yantai, Shandong, China
| | - Xiaobo Cen
- WestChina-Frontier PharmaTech Co., Ltd., Chengdu, Sichuan, China
| | - Hongbo Wang
- Key Laboratory of Molecular Pharmacology and Drug Evaluation, School of Pharmacy, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, Shandong, China
| | - Jingwei Tian
- Key Laboratory of Molecular Pharmacology and Drug Evaluation, School of Pharmacy, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, Shandong, China
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Amgott-Kwan AT, Zadina JE. Endomorphin analog ZH853 shows low reward, tolerance, and affective-motivational signs of withdrawal, while inhibiting opioid withdrawal and seeking. Neuropharmacology 2023; 227:109439. [PMID: 36709036 DOI: 10.1016/j.neuropharm.2023.109439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 01/09/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
Currently available μ-opioid receptor agonist pharmacotherapies for opioid use disorder possess adverse effects limiting their use and, despite treatment, rates of relapse remain high. We previously showed that endomorphin analog ZH853 had no effect in rodent models that predict abuse liability in humans. Here we extended these findings by examining dependence liability and reinforcing properties in female rats and male rats with previous opioid exposure. The potential use of ZH853 in managing opioid use disorder was evaluated by examining its effect on opioid-seeking behavior and withdrawal. We found that ZH853 did not induce locomotor activation in male and female mice and was not self-administered by female rats. Relative to morphine, ZH853 led to similar somatic signs of withdrawal, but low affective-motivational signs of withdrawal, and absent changes in ventral tegmental area K(+)-Cl(-) co-transporter expression associated with reward dysregulation. The low abuse liability of ZH853 was further supported in oxycodone self-administering male rats, where ZH853 substitution extinguished opioid-seeking behavior. ZH853 priming also did not reinstate morphine conditioned place preference. Lastly, ZH853 inhibited oxycodone-seeking behavior during relapse after forced abstinence and decreased the expression of morphine withdrawal. These findings suggest the potential use of ZH853 as a safer opioid medication for long-term treatment of pain and opioid use disorder.
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Affiliation(s)
- Ariel T Amgott-Kwan
- Neuroscience Program, Tulane Brain Institute: 6823 St Charles Avenue, 200 Flower Hall, Tulane University, New Orleans, LA, 70118, USA.
| | - James E Zadina
- Neuroscience Program, Tulane Brain Institute: 6823 St Charles Avenue, 200 Flower Hall, Tulane University, New Orleans, LA, 70118, USA; Department of Medicine, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA; Department of Pharmacology, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA; SE Louisiana Veterans Health Care System, 2400 Canal Street, New Orleans, LA, 70119, USA.
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Yin F, Zhang J, Lu Y, Zhang Y, Liu J, Deji C, Qiao X, Gao K, Xu M, Lai J, Wang Y. Modafinil rescues repeated morphine-induced synaptic and behavioural impairments via activation of D1R-ERK-CREB pathway in medial prefrontal cortex. Addict Biol 2022; 27:e13103. [PMID: 34647651 DOI: 10.1111/adb.13103] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 06/19/2021] [Accepted: 09/13/2021] [Indexed: 11/30/2022]
Abstract
Long-term opioid abuse causes a variety of long-lasting cognitive impairments such as attention, impulsivity and working memory. These cognitive impairments undermine behavioural treatment for drug abuse and lead to poor treatment retention and outcomes. Modafinil is a wake-promoting drug that shows potential in improving attention and memory in humans and animals. However, modafinil's effect on opioid-induced cognitive impairments remains unclear, and the underlying mechanism is poorly understood. This study showed that repeated morphine administration significantly impairs attention, increases impulsivity and reduces motivation to natural rewards in mice. Systemic modafinil treatment at low dose efficiently ameliorates morphine-induced attention dysfunction and improves motivation and working memory in mice. High dose of modafinil has adverse effects on impulsive action and attention. Local infusion of D1R antagonist SCH-23390 reverses the morphine-induced synaptic abnormalities and activation of the D1R-ERK-CREB pathway in medial prefrontal cortex (mPFC). This study demonstrated a protective effect of modafinil in mPFC neurons and offered a therapeutic potential for cognitive deficits in opioid abuse.
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Affiliation(s)
- Fangyuan Yin
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Jinyu Zhang
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Ye Lu
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yulei Zhang
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Jincen Liu
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Cuola Deji
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xiaomeng Qiao
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China
| | - Keqiang Gao
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Min Xu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jianghua Lai
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yunpeng Wang
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, Shaanxi, China
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Langlois LD, Berman RY, Shepard RD, Simmons SC, Tsuda MC, Gouty S, Choi KH, Nugent FS. Potentiation of glutamatergic synaptic transmission onto lateral habenula neurons following early life stress and intravenous morphine self-administration in rats. Addict Biol 2022; 27:e13064. [PMID: 34036710 PMCID: PMC8613295 DOI: 10.1111/adb.13064] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 01/06/2023]
Abstract
Early life stress presents an important risk factor for drug addiction and comorbid depression and anxiety through persistent effects on the mesolimbic dopamine pathways. Using an early life stress model for child neglect (a single 24 h episode of maternal deprivation, MD) in rats, recent published works from our lab show that MD induces dysfunction in the ventral tegmental area and its negative controller, the lateral habenula (LHb). MD-induced potentiation of glutamatergic synaptic transmission onto LHb neurons shifts the coordination of excitation/inhibition (E/I) balance towards excitation, resulting in an increase in the overall spontaneous neuronal activity with elevation in bursting and tonic firing, and in the intrinsic excitability of LHb neurons in early adolescent male rats. Here, we explored how MD affects intravenous morphine self-administration (MSA) acquisition and sucrose preference as well as glutamatergic synaptic function in LHb neurons of adult male rats self-administering morphine. We found that MD-induced increases in LHb neuronal and glutamatergic synaptic activity and E/I ratio persisted into adulthood. Moreover, MD significantly reduced morphine intake, triggered anhedonia-like behaviour in the sucrose preference test and was associated with persistent glutamatergic potentiation 24 h after the last MSA session. MSA also altered the decay time kinetics of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor (AMPAR) currents in LHb neurons of control rats during this time period. Our data highlight that early life stress-induced glutamatergic plasticity in LHb may dampen the positive reinforcing and motivational properties of both natural rewards and opioids, and may contribute to the development of anhedonia and dysphoric states associated with opioids.
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Affiliation(s)
- Ludovic D. Langlois
- Uniformed Services University of the Health Sciences, Edward Hebert School of Medicine, Department of Pharmacology, Bethesda, Maryland 20814, USA
| | - Rina Y. Berman
- Uniformed Services University of the Health Sciences, Edward Hebert School of Medicine, Department of Psychiatry, Bethesda, Maryland 20814, USA
| | - Ryan D. Shepard
- Uniformed Services University of the Health Sciences, Edward Hebert School of Medicine, Department of Pharmacology, Bethesda, Maryland 20814, USA
| | - Sarah C. Simmons
- Uniformed Services University of the Health Sciences, Edward Hebert School of Medicine, Department of Pharmacology, Bethesda, Maryland 20814, USA
| | - Mumeko C. Tsuda
- Uniformed Services University of the Health Sciences, Edward Hebert School of Medicine, Rat Behavior Core, Bethesda, Maryland 20814, USA
| | - Shawn Gouty
- Uniformed Services University of the Health Sciences, Edward Hebert School of Medicine, Department of Pharmacology, Bethesda, Maryland 20814, USA
| | - Kwang H. Choi
- Uniformed Services University of the Health Sciences, Edward Hebert School of Medicine, Department of Psychiatry, Bethesda, Maryland 20814, USA
| | - Fereshteh S. Nugent
- Uniformed Services University of the Health Sciences, Edward Hebert School of Medicine, Department of Pharmacology, Bethesda, Maryland 20814, USA
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Indices of dentate gyrus neurogenesis are unaffected immediately after or following withdrawal from morphine self-administration compared to saline self-administering control male rats. Behav Brain Res 2019; 381:112448. [PMID: 31870778 DOI: 10.1016/j.bbr.2019.112448] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 12/01/2019] [Accepted: 12/19/2019] [Indexed: 12/16/2022]
Abstract
Opiates - including morphine - are powerful analgesics with high abuse potential. In rodents, chronic opiate exposure or self-administration negatively impacts hippocampal-dependent function, an effect perhaps due in part to the well-documented opiate-induced inhibition of dentate gyrus (DG) precursor proliferation and neurogenesis. Recently, however, intravenous (i.v.) morphine self-administration (MSA) was reported to enhance the survival of new rat DG neurons. To reconcile these disparate results, we used rat i.v. MSA to assess 1) whether a slightly-higher dose MSA paradigm also increases new DG neuron survival; 2) how MSA influences cells in different stages of DG neurogenesis, particularly maturation and survival; and 3) if MSA-induced changes in DG neurogenesis persist through a period of abstinence. To label basal levels of proliferation, rats received the S-phase marker bromodeoxyuridine (BrdU, i.p.) 24 -h prior to 21 days (D) of i.v. MSA or saline self-administration (SSA). Either immediately after SA (0-D) or after 4 weeks in the home cage (28-D withdrawal), stereology was used to quantify DG proliferating precursors (or cells in cell cycle; Ki67+ cells), neuroblast/immature neurons (DCX+ cells), and surviving DG granule cells (BrdU+ cells). Analysis revealed the number of DG cells immunopositive for these neurogenesis-relevant markers was similar between MSA and SSA rats at the 0-D or 28-D timepoints. These negative data highlight the impact experimental parameters, timepoint selection, and quantification approach have on neurogenesis results, and are discussed in the context of the large literature showing the negative impact of opiates on DG neurogenesis.
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Shafiei F, Afarinesh MR, Golshan F, Haghpanah T, Sabzalizadeh M, Zangiabadi I, Sheibani V. Comparison of pre-pulse inhibition, tactile discrimination learning and barrel cortical neural response in adult male rats following chronic exposure to morphine, methadone and buprenorphine. Physiol Behav 2019; 212:112694. [PMID: 31622612 DOI: 10.1016/j.physbeh.2019.112694] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 09/14/2019] [Accepted: 09/27/2019] [Indexed: 12/01/2022]
Abstract
Chronic exposure to opioids is the most common treatment plan to reduce the pain. In this study, the stereotyped behaviors and cognitive functions related to different types of tactile and auditory inputs were investigated in the rats following chronic exposure to the morphine, methadone, and buprenorphine. Here, three addicted groups received morphine, methadone, and buprenorphine while the control rats received saline for 21 days. Our results demonstrated that the opioid-treated groups showed stereotyped behaviors including grooming and rearing. In the behavioral level, prepulse inhibition and preference indices were not changed significantly in the opioids-treated groups compared to those of the saline group as two criteria for acoustic startle reflex and tactile discrimination, respectively. In the neuronal level, chronic morphine and methadone treatment changed the response properties of the barrel cortical neurons to the whisker deflections in the experimental groups compared to the saline group. Thus, it was concluded that the excitatory receptive fields of neurons in the barrel cortex can be changed as a result of chronic exposure to morphine and methadone.
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Affiliation(s)
- Faezeh Shafiei
- Kerman Neuroscience Research Center, Institute of Neuropharmachology, Kerman University of Medical Sciences, Kerman, Iran; Kerman Cognitive Neuroscience Research Center, Institute of Neuropharmachology, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Reza Afarinesh
- Kerman Neuroscience Research Center, Institute of Neuropharmachology, Kerman University of Medical Sciences, Kerman, Iran; Kerman Cognitive Neuroscience Research Center, Institute of Neuropharmachology, Kerman University of Medical Sciences, Kerman, Iran.
| | - Fatemeh Golshan
- Kerman Neuroscience Research Center, Institute of Neuropharmachology, Kerman University of Medical Sciences, Kerman, Iran
| | - Tahereh Haghpanah
- Department of Anatomy, School of Afzalipour Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mansoureh Sabzalizadeh
- Kerman Neuroscience Research Center, Institute of Neuropharmachology, Kerman University of Medical Sciences, Kerman, Iran
| | - Iman Zangiabadi
- Department of Anatomy, School of Afzalipour Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Vahid Sheibani
- Kerman Neuroscience Research Center, Institute of Neuropharmachology, Kerman University of Medical Sciences, Kerman, Iran; Kerman Cognitive Neuroscience Research Center, Institute of Neuropharmachology, Kerman University of Medical Sciences, Kerman, Iran
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7
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Eklund KE, Nishida KS, Barry ES, Choi KH, Grunberg NE. Examination of the Gateway Hypothesis in a rat model. Pharmacol Biochem Behav 2019; 179:89-97. [PMID: 30797762 DOI: 10.1016/j.pbb.2019.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 02/01/2019] [Accepted: 02/18/2019] [Indexed: 01/08/2023]
Abstract
The Gateway Hypothesis is based on epidemiological data and states there is a progression of drug use from use of a softer drug (e.g., nicotine) to use of a harder drug (e.g., morphine). It has been suggested that this sequence is causal and is relevant to drug prevention policies and programs. The present experiment used an animal model to investigate whether the Gateway Hypothesis involves a causal progression. Subjects were 16 female and 16 male Sprague-Dawley rats with ages comparable to late adolescence/emerging adulthood in humans. Subjects received nicotine (6 mg/kg/day) or saline for 21 days SC via osmotic minipump and subsequently were allowed to self-administer IV morphine (0.5 mg/kg/injection, 3 h/day) for 10 days. Results did not confirm the Gateway Hypothesis. In fact, rats pre-exposed to nicotine self-administered significantly less morphine than did rats pre-exposed to saline. These findings may be relevant to future drug use prevention policies and programs.
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Affiliation(s)
- Kathryn E Eklund
- Department Medical and Clinical Psychology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD, United States of America.
| | - Kevin S Nishida
- Department of Psychiatry, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD, United States of America
| | - Erin S Barry
- Department of Military & Emergency Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD, United States of America.
| | - Kwang H Choi
- Department of Psychiatry, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD, United States of America.
| | - Neil E Grunberg
- Department Medical and Clinical Psychology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD, United States of America; Department of Military & Emergency Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD, United States of America.
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8
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Brolin E, Zelleroth S, Jonsson A, Hallberg M, Grönbladh A, Nyberg F. Chronic administration of morphine using mini-osmotic pumps affects spatial memory in the male rat. Pharmacol Biochem Behav 2018; 167:1-8. [DOI: 10.1016/j.pbb.2018.01.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 12/19/2017] [Accepted: 01/31/2018] [Indexed: 11/30/2022]
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9
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Park TY, Nishida KS, Wilson CM, Jaiswal S, Scott J, Hoy AR, Selwyn RG, Dardzinski BJ, Choi KH. Effects of isoflurane anesthesia and intravenous morphine self-administration on regional glucose metabolism ([ 18 F]FDG-PET) of male Sprague-Dawley rats. Eur J Neurosci 2017; 45:922-931. [PMID: 28196306 DOI: 10.1111/ejn.13542] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 02/07/2017] [Accepted: 02/08/2017] [Indexed: 01/22/2023]
Abstract
Although certain drugs of abuse are known to disrupt brain glucose metabolism (BGluM), the effects of opiates on BGluM are not well characterized. Moreover, preclinical positron emission tomography (PET) studies anesthetize animals during the scan, which limits clinical applications. We investigated the effects of (i) isoflurane anesthesia and (ii) intravenous morphine self-administration (MSA) on BGluM in rats. Jugular vein cannulated adult male Sprague-Dawley rats self-administered either saline (SSA) or morphine (0.5 mg/kg/infusion, 4 h/day for 12 days). All animals were scanned twice with [18 F]-fluoro-deoxy-glucose (FDG)-PET/CT at a baseline and at 2-day withdrawal from self-administration. After the IV injection of FDG, one batch of animals (n = 14) was anesthetized with isoflurane and the other batch (n = 16) was kept awake during the FDG uptake (45 min). After FDG uptake, all animals were anesthetized in order to perform a PET/CT scan (30 min). Isoflurane anesthesia, as compared to the awake condition, reduced BGluM in the olfactory, cortex, thalamus, and basal ganglia, while increasing BGluM in the midbrain, hypothalamus, hippocampus, and cerebellum. Morphine self-administered animals exhibited withdrawal signs (piloerection and increased defecation), drug seeking, and locomotor stimulation to morphine (0.5 mg/kg) during the 2 day withdrawal. The BGluM in the striatum was increased in the MSA group as compared to the SSA group; this effect was observed only in the isoflurane anesthesia, not the awake condition. These findings suggest that the choice of the FDG uptake condition may be important in preclinical PET studies and increased BGluM in the striatum may be associated with opiate seeking in withdrawal.
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Affiliation(s)
- Thomas Y Park
- Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, 20814, USA.,Center for the Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Kevin S Nishida
- Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, 20814, USA.,Center for the Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Colin M Wilson
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Radiology, University of New Mexico, Albuquerque, NM, USA
| | - Shalini Jaiswal
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Jessica Scott
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Andrew R Hoy
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Reed G Selwyn
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Radiology, University of New Mexico, Albuquerque, NM, USA.,Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Bernard J Dardzinski
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Kwang H Choi
- Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, 20814, USA.,Center for the Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Program in Neuroscience, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
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Abstract
This paper is the thirty-eighth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2015 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior, and the roles of these opioid peptides and receptors in pain and analgesia, stress and social status, tolerance and dependence, learning and memory, eating and drinking, drug abuse and alcohol, sexual activity and hormones, pregnancy, development and endocrinology, mental illness and mood, seizures and neurologic disorders, electrical-related activity and neurophysiology, general activity and locomotion, gastrointestinal, renal and hepatic functions, cardiovascular responses, respiration and thermoregulation, and immunological responses.
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, Flushing, NY 11367, United States.
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11
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Radford KD, Park TY, Lee BH, Moran S, Osborne LA, Choi KH. Dose-response characteristics of intravenous ketamine on dissociative stereotypy, locomotion, sensorimotor gating, and nociception in male Sprague-Dawley rats. Pharmacol Biochem Behav 2016; 153:130-140. [PMID: 28024909 DOI: 10.1016/j.pbb.2016.12.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 12/22/2016] [Accepted: 12/22/2016] [Indexed: 11/25/2022]
Abstract
Clinicians administer subanesthetic intravenous (IV) ketamine infusions for treatment of refractory depression, chronic pain, and post-traumatic stress disorder in humans. However, ketamine is administered via the subcutaneous (SC) or intraperitoneal (IP) routes to rodents in most pre-clinical research, which may limit translational application. The present study characterized the dose-response of a subanesthetic IV ketamine bolus (2 and 5mg/kg) and 1-h infusion (5, 10, and 20mg/kg/h) on dissociative stereotypy, locomotion, sensorimotor gating, and thermal nociception in male Sprague-Dawley rats. The secondary aim was to measure ketamine and norketamine plasma concentrations following IV ketamine bolus at 1, 20, and 50min and at the conclusion of the 1-h infusion using liquid chromatography/mass spectrometry. The results showed that ketamine bolus and infusions produced dose-dependent dissociative stereotypy. Bolus (2 and 5mg/kg) and 20mg/kg/h infusion increased locomotor activity while 5mg/kg/h infusion decreased locomotor activity. Both 10 and 20mg/kg/h infusions reduced the acoustic startle reflex, while 5mg/kg bolus and 20mg/kg/h infusion impaired pre-pulse inhibition. Ketamine 5mg/kg bolus and the 10 and 20mg/kg/h infusions induced significant and prolonged antinociception to the hotplate test. Plasma concentrations of ketamine decreased quickly after bolus while norketamine levels increased from 1 to 20min and plateaued from 20 to 50min. The peak ketamine plasma concentrations [ng/ml] were similar between 5mg/kg bolus [4100] vs. 20mg/kg/h infusion [3900], and 2mg/kg bolus [1700] vs. 10mg/kg/h infusion [1500]. These results support the findings from previous ketamine injection studies and further validate the feasibility of administering subanesthetic doses of IV ketamine infusion to rats for neuropharmacological studies.
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Affiliation(s)
- Kennett D Radford
- Daniel K. Inouye Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Thomas Y Park
- Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, USA; The Center for Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Bong Hyo Lee
- Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, USA; Department of Acupuncture, Moxibustion and Acupoint, College of Korean Medicine, Daegu Haany University, Daegu 42158, Republic of Korea
| | - Sean Moran
- Department of Biochemistry and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Lisa A Osborne
- Daniel K. Inouye Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Kwang H Choi
- Daniel K. Inouye Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD, USA; Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, USA; The Center for Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
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Lee BH, Park TY, Lin E, Li H, Yang CH, Choi KH. Altered Acoustic Startle Reflex, Prepulse Inhibition, and Peripheral Brain-Derived Neurotrophic Factor in Morphine Self-Administered Rats. Int J Neuropsychopharmacol 2016; 20:383-391. [PMID: 27927738 PMCID: PMC5417055 DOI: 10.1093/ijnp/pyw107] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 11/23/2016] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Previous studies suggested that opiate withdrawal may increase anxiety and disrupt brain-derived neurotrophic factor function, but the effects of i.v. morphine self-administration on these measures remain unclear. METHODS Adult male Sprague-Dawley rats were implanted with a catheter in the jugular vein. After 1 week of recovery, the animals were allowed to self-administer either i.v. morphine (0.5 mg/kg per infusion, 4 h/d) or saline in the operant conditioning chambers. The acoustic startle reflex and prepulse inhibition were measured at a baseline and on self-administration days 1, 3, 5, and 7 (1- and 3-hour withdrawal). Blood samples were collected on self-administration days 3, 5, and 7 from separate cohorts of animals, and the levels of brain-derived neurotrophic factor and corticosterone were assayed using the enzyme-linked immunosorbent assay method. RESULTS Compared with the saline group, the morphine self-administration group showed hyper-locomotor activity and reduced defecation during the self-administration. The morphine self-administration increased acoustic startle reflex at 1-hour but not 3-hour withdrawal from morphine and disrupted prepulse inhibition at 3-hour but not 1-hour withdrawal. The blood brain-derived neurotrophic factor levels were decreased in the morphine self-administration group at self-administration days 3 and 5, while the corticosterone levels remained unchanged throughout the study. CONCLUSIONS The current findings suggest that spontaneous withdrawal from i.v. morphine self-administration may have transient effects on acoustic startle, sensorimotor gating, and peripheral brain-derived neurotrophic factor levels, and these changes may contribute to the adverse effects of opiate withdrawal.
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Affiliation(s)
- Bong Hyo Lee
- Department of Acupuncture, Moxibustion and Acupoint, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Lee); Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Lee, Mr Park, Ms Lin, Dr Li, and Dr Choi); Center for Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD (Mr Park, Dr Li, and Dr Choi); Department of Physiology, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Yang); Daniel K. Inouye Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Choi)
| | - Thomas Y. Park
- Department of Acupuncture, Moxibustion and Acupoint, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Lee); Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Lee, Mr Park, Ms Lin, Dr Li, and Dr Choi); Center for Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD (Mr Park, Dr Li, and Dr Choi); Department of Physiology, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Yang); Daniel K. Inouye Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Choi)
| | - Erica Lin
- Department of Acupuncture, Moxibustion and Acupoint, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Lee); Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Lee, Mr Park, Ms Lin, Dr Li, and Dr Choi); Center for Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD (Mr Park, Dr Li, and Dr Choi); Department of Physiology, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Yang); Daniel K. Inouye Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Choi)
| | - He Li
- Department of Acupuncture, Moxibustion and Acupoint, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Lee); Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Lee, Mr Park, Ms Lin, Dr Li, and Dr Choi); Center for Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD (Mr Park, Dr Li, and Dr Choi); Department of Physiology, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Yang); Daniel K. Inouye Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Choi)
| | - Chae Ha Yang
- Department of Acupuncture, Moxibustion and Acupoint, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Lee); Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Lee, Mr Park, Ms Lin, Dr Li, and Dr Choi); Center for Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD (Mr Park, Dr Li, and Dr Choi); Department of Physiology, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Yang); Daniel K. Inouye Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Choi)
| | - Kwang H. Choi
- Department of Acupuncture, Moxibustion and Acupoint, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Lee); Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Lee, Mr Park, Ms Lin, Dr Li, and Dr Choi); Center for Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD (Mr Park, Dr Li, and Dr Choi); Department of Physiology, College of Korean Medicine, Daegu Haany University, Daegu, Republic of Korea (Dr Yang); Daniel K. Inouye Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD (Dr Choi)
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Individual differences in initial morphine sensitivity as a predictor for the development of opiate addiction in rats. Behav Brain Res 2016; 313:315-323. [DOI: 10.1016/j.bbr.2016.07.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 07/09/2016] [Accepted: 07/21/2016] [Indexed: 12/14/2022]
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