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Manuszak M, Harding W, Gadhiya S, Ranaldi R. (-)-Stepholidine reduces cue-induced reinstatement of cocaine seeking and cocaine self-administration in rats. Drug Alcohol Depend 2018; 189:49-54. [PMID: 29879681 PMCID: PMC6062455 DOI: 10.1016/j.drugalcdep.2018.04.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 04/18/2018] [Accepted: 04/20/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND Dopamine receptors are implicated in cocaine reward and seeking. We hypothesize that (-)-stepholidine, a dopamine D1/D2/D3 multi-receptor agent, would be effective in reducing cocaine reward and seeking in an animal model. We investigated the effects of (-)-stepholidine in cue-induced reinstatement of cocaine seeking and cocaine self-administration (reward). METHODS Cue-induced reinstatement experiment: Rats were trained to press a lever reinforced by cocaine (1 mg/kg/injection) for 15 consecutive daily sessions, after which the response was extinguished by withholding cocaine and cocaine-paired cues (light and pump activation). This was followed by a cue-induced reinstatement test where subjects were exposed to two cocaine cue presentations and presses on the active lever produced cues. Subjects were treated with one of four (-)-stepholidine doses prior to the reinstatement test. Cocaine self-administration (reward) experiment: Rats were trained to self-administer cocaine under a progressive ratio schedule of reinforcement. After stable breakpoints were established, rats were injected with four doses of (-)-stepholidine prior to testing; each dose was injected prior to a separate test session with no-treatment sessions intervening to re-establish break points. RESULTS (-)-Stepholidine significantly reduced cue-induced reinstatement of cocaine seeking in a dose-related manner. Additionally, (-)-stepholidine significantly reduced break points for cocaine reward. (-)-Stepholidine did not significantly affect locomotor activity. CONCLUSIONS (-)-Stepholidine reduces cue-induced reinstatement of cocaine seeking and cocaine reward, suggesting that it may be useful in treating relapse in cocaine addiction.
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Affiliation(s)
- M. Manuszak
- Department of Psychology, Queens College, City University of New York, 65-30 Kissena Blvd, Flushing NY 11367, USA
| | - W. Harding
- Department of Chemistry, Hunter College, City University of New York, 695 Park Avenue, NY 10065, USA,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY 10016, USA,Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York, New York, NY 10016
| | - S. Gadhiya
- Angion Biomedica Corp., 51 Charles Linndbergh Blvd, Uniondale, NY 11553, USA
| | - R. Ranaldi
- Department of Psychology, Queens College, City University of New York, 65-30 Kissena Blvd, Flushing NY 11367, USA,The Graduate Center of the City University of New York, New York, NY 10016, USA
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Galaj E, Shukur A, Manuszak M, Newman K, Ranaldi R. No evidence that environmental enrichment during rearing protects against cocaine behavioral effects but as an intervention reduces an already established cocaine conditioned place preference. Pharmacol Biochem Behav 2017; 156:56-62. [DOI: 10.1016/j.pbb.2017.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 04/12/2017] [Accepted: 04/14/2017] [Indexed: 12/13/2022]
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Galaj E, Manuszak M, Ranaldi R. Environmental enrichment as a potential intervention for heroin seeking. Drug Alcohol Depend 2016; 163:195-201. [PMID: 27125660 DOI: 10.1016/j.drugalcdep.2016.04.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 04/08/2016] [Accepted: 04/14/2016] [Indexed: 12/25/2022]
Abstract
BACKGROUND Heroin-related cues can trigger craving and relapse in addicts or heroin seeking in rats. In the present study we investigated whether environmental enrichment (EE) implemented after heroin exposure can reduce cue-induced reinstatement of heroin seeking and expression of heroin conditioned place preference. METHODS In Experiment 1, male Long Evans rats that already acquired a heroin self-administration habit, were housed in enriched or non-enriched environments, underwent extinction training and later were tested for cue-induced reinstatement of heroin seeking. In Experiment 2, rats were conditioned with heroin in one compartment of a CPP apparatus and saline in the other, exposed to 30days of enrichment or no enrichment and were later tested for heroin CPP. RESULTS The results showed that exposure to EE significantly reduced responding during the reinstatement test (Experiment 1) and prevented the expression of heroin CPP (Experiment 2). CONCLUSION Our findings suggest that EE can be an effective behavioral approach to diminish the effects of conditioned cues on heroin seeking.
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Affiliation(s)
- E Galaj
- CUNY, The Graduate Center, United States
| | - M Manuszak
- Queens College of the City University of New York, Department of Psychology, United States
| | - R Ranaldi
- CUNY, The Graduate Center, United States; Queens College of the City University of New York, Department of Psychology, United States.
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Inan M, Zhao M, Manuszak M, Karakaya C, Rajadhyaksha AM, Pickel VM, Schwartz TH, Goldstein PA, Manfredi G. Energy deficit in parvalbumin neurons leads to circuit dysfunction, impaired sensory gating and social disability. Neurobiol Dis 2016; 93:35-46. [PMID: 27105708 DOI: 10.1016/j.nbd.2016.04.004] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 04/13/2016] [Accepted: 04/15/2016] [Indexed: 12/17/2022] Open
Abstract
Parvalbumin-expressing, fast spiking interneurons have high-energy demands, which make them particularly susceptible to energy impairment. Recent evidence suggests a link between mitochondrial dysfunction in fast spiking cortical interneurons and neuropsychiatric disorders. However, the effect of mitochondrial dysfunction restricted to parvalbumin interneurons has not been directly addressed in vivo. To investigate the consequences of mitochondrial dysfunction in parvalbumin interneurons in vivo, we generated conditional knockout mice with a progressive decline in oxidative phosphorylation by deleting cox10 gene selectively in parvalbumin neurons (PV-Cox10 CKO). Cox10 ablation results in defective assembly of cytochrome oxidase, the terminal enzyme of the electron transfer chain, and leads to mitochondrial bioenergetic dysfunction. PV-Cox10 CKO mice showed a progressive loss of cytochrome oxidase in cortical parvalbumin interneurons. Cytochrome oxidase protein levels were significantly reduced starting at postnatal day 60, and this was not associated with a change in parvalbumin interneuron density. Analyses of intrinsic electrophysiological properties in layer 5 primary somatosensory cortex revealed that parvalbumin interneurons could not sustain their typical high frequency firing, and their overall excitability was enhanced. An increase in both excitatory and inhibitory input onto parvalbumin interneurons was observed in PV-Cox10 CKO mice, resulting in a disinhibited network with an imbalance of excitation/inhibition. Investigation of network oscillations in PV-Cox10 CKO mice, using local field potential recordings in anesthetized mice, revealed significantly increased gamma and theta frequency oscillation power in both medial prefrontal cortex and hippocampus. PV-Cox10 CKO mice did not exhibit muscle strength or gross motor activity deficits in the time frame of the experiments, but displayed impaired sensory gating and sociability. Taken together, these data reveal that mitochondrial dysfunction in parvalbumin interneurons can alter their intrinsic physiology and network connectivity, resulting in behavioral alterations similar to those observed in neuropsychiatric disorders, such as schizophrenia and autism.
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Affiliation(s)
- Melis Inan
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, United States
| | - Mingrui Zhao
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, United States; Department of Neurological Surgery, Weill Cornell Medical College, New York, NY, United States
| | - Monica Manuszak
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, United States
| | - Cansu Karakaya
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, United States
| | - Anjali M Rajadhyaksha
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, United States; Department of Pediatric Neurology, Weill Cornell Medical College, New York, NY, United States; Department of Anesthesiology, Weill Cornell Medical College, New York, NY, United States
| | - Virginia M Pickel
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, United States
| | - Theodore H Schwartz
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, United States; Department of Neurological Surgery, Weill Cornell Medical College, New York, NY, United States
| | - Peter A Goldstein
- Department of Anesthesiology, Weill Cornell Medical College, New York, NY, United States; Department of Medicine, Weill Cornell Medical College, New York, NY, United States.
| | - Giovanni Manfredi
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, United States.
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Galaj E, Manuszak M, Arastehmanesh D, Ranaldi R. Microinjections of a dopamine D1 receptor antagonist into the ventral tegmental area block the expression of cocaine conditioned place preference in rats. Behav Brain Res 2014; 272:279-85. [PMID: 25017572 DOI: 10.1016/j.bbr.2014.07.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 06/11/2014] [Accepted: 07/03/2014] [Indexed: 11/17/2022]
Abstract
Stimulation of dopamine (DA) D1 receptors in the ventral tegmental area (VTA) is involved in primary rewards. In the current study we investigated whether VTA D1 receptor stimulation likewise plays a role in mediating the rewarding effects of cocaine-associated stimuli, using the cocaine conditioned place preference (CPP) paradigm. Rats were prepared with cannulae so as to allow microinjections in the VTA and later conditioned to a cocaine-associated environment using the CPP paradigm. Prior to each conditioning session rats were injected with either saline or cocaine (10mg/kg, intraperitoneally) and then placed in one of the two sides of the CPP apparatus. Sessions lasted 30min a day over a period of eight days, such that rats alternated daily between consistently experiencing cocaine in one side and saline in the other. On the test day, which was conducted one day after conditioning, rats were given bilateral microinjections of one of four doses of the D1 antagonist, SCH 23390, (0, 2, 4 or 8μg/0.5μl) directly into the VTA and allowed free access to both sides of the apparatus. Preference for either side was measured as time spent in each side and compared to the same measures taken before conditioning. The D1 antagonist produced a dose-related, significant reduction in the preference for the cocaine-paired side compared to vehicle. These data suggest that the expression of cocaine conditioned place preference requires stimulation of VTA D1 receptors and, as such, are the first to suggest a role for VTA dendritically released DA in cocaine-, or other reward-, related learning.
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Affiliation(s)
- E Galaj
- Graduate Center of City University of New York, NY, United States
| | | | | | - R Ranaldi
- Graduate Center of City University of New York, NY, United States; Queens College, NY, United States.
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