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Senior D, McCarthy M, Ahmed R, Klein S, Lee WX, Hadjiargyrou M, Komatsu D, Steiner H, Thanos PK. Chronic oral methylphenidate plus fluoxetine treatment in adolescent rats increases cocaine self-administration. Addict Neurosci 2023; 8:100127. [PMID: 38274857 PMCID: PMC10809890 DOI: 10.1016/j.addicn.2023.100127] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
Background Depression and attention deficit hyperactivity disorder are known to be comorbid. Treatment of these commonly coexisting diseases typically involves the combined prescription of methylphenidate (MP), a psychostimulant, and fluoxetine (FLX), a selective serotonin reuptake inhibitor (SSRI). MP and cocaine have similar mechanisms of action and this study examined the effects of chronic treatment of MP combined with FLX on cocaine consumption in rats. Methods Four groups of rats received access to drinking solutions of water (control), MP (30/60 mg/kg/day), FLX (20 mg/kg/day), or the combination of MP (30/60 mg/kg/day) plus FLX (20 mg/kg/day), during 8 h per day for one month. Following these drug treatments, rats were allowed to self-administer cocaine for 14 days. Results Our results showed that, during the first week of cocaine self-administration, the MP-treated rats had significantly greater numbers of active lever presses (plus 127%) and increased consumption of cocaine compared to the control rats. In contrast, during week two of cocaine self-administration, the rats treated with the MP + FLX combination showed significantly more lever presses (plus 198%) and significantly greater cocaine consumption (plus 84%) compared to the water controls. Conclusion Chronic oral treatment during adolescence with the combination of MP plus FLX resulted in increased cocaine use after 2 weeks of cocaine self-administration in rats. These novel findings suggest that the combined exposure to these two drugs chronically, during adolescence, may produce increased vulnerability towards cocaine abuse during young adulthood.
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Affiliation(s)
- Daniela Senior
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
| | - Madison McCarthy
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
| | - Rania Ahmed
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
- Department of Psychology, University at Buffalo, Buffalo, NY, 14203, USA
| | - Shannon Klein
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
| | - Wen Xuan Lee
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
| | - Michael Hadjiargyrou
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY, USA
| | - David Komatsu
- Department of Orthopedics, Stony Brook University, Stony Brook, NY, USA
| | - Heinz Steiner
- Stanson Toshok Center for Brain Function and Repair, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA
- Discipline of Cellular and Molecular Pharmacology, The Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA
| | - Panayotis K. Thanos
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
- Department of Psychology, University at Buffalo, Buffalo, NY, 14203, USA
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Debkowska M, Lynch B, Ruskin J, Komatsu D, Caradonna S, Wang E, Muhlrad S. What factors do patients consider when choosing a hand surgeon? Case Reports Plast Surg Hand Surg 2023; 10:2222802. [PMID: 37346889 PMCID: PMC10281408 DOI: 10.1080/23320885.2023.2222802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 06/04/2023] [Indexed: 06/23/2023]
Abstract
This study evaluated what patients consider in choosing a surgeon. A survey was given to 303 patients. Most found their hand surgeon through a medical or family/friend referral (p < .05). Surgeon credentials and accepted insurance were statistically more likely to be rated first (p<.001). We recommend educating referring physicians about our practices.
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Affiliation(s)
- Monika Debkowska
- Department of Orthopaedic Surgery, Stony Brook University Hospital, Stony Brook, NY, USA
| | - Brian Lynch
- Department of Orthopaedic Surgery, Stony Brook University Hospital, Stony Brook, NY, USA
| | - Jeremy Ruskin
- Department of Orthopaedic Surgery, Stony Brook University Hospital, Stony Brook, NY, USA
| | - David Komatsu
- Department of Orthopaedic Surgery, Stony Brook University Hospital, Stony Brook, NY, USA
| | - Samuel Caradonna
- Department of Orthopaedic Surgery, Stony Brook University Hospital, Stony Brook, NY, USA
| | - Edward Wang
- Department of Orthopaedic Surgery, Stony Brook University Hospital, Stony Brook, NY, USA
| | - Samantha Muhlrad
- Department of Orthopaedic Surgery, Stony Brook University Hospital, Stony Brook, NY, USA
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Thanos PK, McCarthy M, Senior D, Watts S, Connor C, Hammond N, Blum K, Hadjiargyrou M, Komatsu D, Steiner H. Combined Chronic Oral Methylphenidate and Fluoxetine Treatment During Adolescence: Effects on Behavior. Curr Pharm Biotechnol 2023; 24:1307-1314. [PMID: 36306463 DOI: 10.2174/1389201024666221028092342] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 09/14/2022] [Accepted: 09/22/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND Attention Deficit Hyperactivity Disorder (ADHD) can be comorbid with depression, often leading to the prescription of both methylphenidate (MP) and selective serotonin reuptake inhibitor (SSRI) antidepressants, such as fluoxetine (FLX). Moreover, these drugs are often misused as cognitive enhancers. This study examined the effects of chronic oral co-administration of MP and FLX on depressive- and anxiety-like behaviors. METHODS Adolescent rats received daily either water (control), MP, FLX, or the combination of MP plus FLX in their drinking water over the course of 4 weeks. RESULTS Data analysis shows a decrease in food consumption and body weight for rats exposed to FLX or the combination of MP and FLX. Sucrose consumption was significantly greater in FLX or MP+FLX groups compared to controls. FLX-treated rats showed no effect in the elevated plus maze (EPM; open arm time) and forced swim test (FST; latency to immobility). However, rats treated with the combination (MP+FLX) showed significant anxiolytic-like and anti-depressive-like behaviors (as measured by EPM and FST), as well as significant increases in overall activity (distance traveled in open field test). Finally, the combined MP+FLX treatment induced a decrease in anxiety and depressive- like behaviors significantly greater than the response from either of these drugs alone. CONCLUSION These behavioral results characterize the long-term effects of these drugs (orally administered) that are widely co-administered and co-misused and provide important insight into the potential neurobiological and neurochemical effects. Future research will determine the potential risks of the long-term use of MP and FLX together.
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Affiliation(s)
- Panayotis K Thanos
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
- Department of Psychology, University at Buffalo, Buffalo, NY, 14203, USA
| | - Madison McCarthy
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
| | - Daniela Senior
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
| | - Samantha Watts
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
| | - Carly Connor
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
| | - Nikki Hammond
- Behavioral Neuropharmacology and Neuroimaging Laboratory (BNNL), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14051, USA
| | - Kenneth Blum
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Michael Hadjiargyrou
- Department of Life Sciences, New York Institute of Technology, Old Westbury, NY, USA
| | - David Komatsu
- Department of Orthopedics, Stony Brook University, Stony Brook, NY, USA
| | - Heinz Steiner
- Stanson Toshok Center for Brain Function and Repair, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA
- Discipline of Cellular and Molecular Pharmacology, The Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA
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Arnavut E, Hamilton J, Yao R, Sajjad M, Hadjiargyrou M, Komatsu D, Thanos PK. Abstinence following intermittent methylphenidate exposure dose-dependently modifies brain glucose metabolism in the rat brain. Synapse 2022; 76:17-30. [PMID: 35730134 DOI: 10.1002/syn.22243] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 04/03/2022] [Revised: 06/01/2022] [Accepted: 06/12/2022] [Indexed: 11/10/2022]
Abstract
Methylphenidate (MP) is a psychostimulant chronically prescribed for the treatment of attention deficit hyperactivity disorder (ADHD). Additionally, MP users may take breaks from using the medication during "drug holidays," which may include short-term or long-term breaks from medication. The present study utilized fluorodeoxyglucose (FDG) positron emission tomography (PET) to analyze the effects of chronic oral MP use and abstinence on brain glucose metabolism (BGluM) in rats at two different doses: high dose (HD) and low dose (LD). The schedule of treatment was 3 weeks on-treatment and 1 week off-treatment for a period of 13 weeks, followed by an abstinence period of 4 total weeks. Results showed that chronic MP treatment using this schedule did not lead to significant changes in BGluM when comparing the control to HD MP groups. However, significant activation in BGluM was observed after periods of abstinence between control and HD MP rats in the following brain regions: the trigeminal nucleus, reticular nucleus, inferior olive, lemniscus, mesencephalic reticular formation, inferior colliculus, and several areas of the cerebellum. These brain regions and functional brain circuit play a role in facial sensory function, the auditory pathway, organizing connections between the thalamus and cortex, motor learning, auditory function, control over eye movement, auditory information integration, and both motor and cognitive functions. These results, when considered with previous studies, indicate that MP schedule of use may have differing effects on BGluM. BGluM following long-term MP use was dependent on MP dose and schedule of use in rats. This study was conducted in non-ADHD model rats with the aim to establish an understanding of the effects of MP itself, especially given the growing chronic off-label and prescribed use of MP. Further studies are needed for analysis of the drug's effects on an ADHD model.
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Affiliation(s)
- Eliz Arnavut
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Department of Pharmacology and Toxicology, Clinical Research Institute on Addictions, Jacobs School of Medicine and Biomedical Sciences, State University at Buffalo, Buffalo, New York
| | - John Hamilton
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Department of Pharmacology and Toxicology, Clinical Research Institute on Addictions, Jacobs School of Medicine and Biomedical Sciences, State University at Buffalo, Buffalo, New York
| | - Rutao Yao
- Department of Nuclear Medicine, State University of New York at Buffalo, Buffalo, New York, USA
| | - Munawwar Sajjad
- Department of Nuclear Medicine, State University of New York at Buffalo, Buffalo, New York, USA
| | - Michael Hadjiargyrou
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, New York, USA
| | - David Komatsu
- Department of Orthopedics, Stony Brook University, Stony Brook, New York, USA
| | - Panayotis K Thanos
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Department of Pharmacology and Toxicology, Clinical Research Institute on Addictions, Jacobs School of Medicine and Biomedical Sciences, State University at Buffalo, Buffalo, New York.,Department of Psychology, State University at Buffalo, Buffalo, New York, USA
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Lynch B, Duke A, Komatsu D, Wang E. Risk of Posterior Interosseous Nerve Injury During Distal Biceps Tendon Repair Using a Cortical Button. Journal of Hand Surgery Global Online 2022; 4:14-18. [PMID: 35415600 PMCID: PMC8991717 DOI: 10.1016/j.jhsg.2021.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 09/28/2021] [Indexed: 12/04/2022] Open
Abstract
Purpose To evaluate the possibility of posterior interosseous nerve (PIN) injury during cortical button deployment and seating associated with bicortical drilling and passage of the cortical button across the distal cortex when repairing a distal biceps rupture in a cadaveric model. Methods Each cadaver was placed in the supine position with the arm extended. A single 4 cm transverse incision was made in the region of the radial tuberosity, 3–4 cm distal to the antecubital fossa flexion crease, and dissected down to the radial tuberosity. A #2 looped nonabsorbable suture was used to baseball stitch the musculotendinous junction to the distal 2.5 cm end of the tendon. A 3.2 mm cannulated drill bit (Arthrex) was used to create a bicortical drill hole in the center of the radial tuberosity aiming 30° ulnar to maximize the distance from the PIN. Fluoroscopy was used to confirm drill placement in the radial tuberosity for all specimens. The posterior aspect of the elbow in all cadavers was subsequently dissected out to directly visualize how far the cannulated drill was from the PIN. Results Twelve cadavers, average age 57.4 years (range, 27–83 years), were dissected. During deployment, the cortical button contacted the PIN directly in 6 extremities. The cortical button came within 6 mm of the PIN in eleven extremities. In 8 specimens, the cortical button was within 2 mm of the PIN. The PIN was caught directly under the cortical button in one specimen. Conclusions Placement of a biceps cortical button bicortically when repairing a distal biceps tendon may increase the risk of injury to the PIN during cortical button deployment and seating. Type of study/level of evidence Therapeutic IV.
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Doany M, Garcia A, Komatsu D, Divaris N, Kottmeier S, Paulus M. Avulsion Fractures of the Calcaneal Tuberosity: A Single-Center Review of Outcomes and Complications. J Am Acad Orthop Surg Glob Res Rev 2021; 5:01979360-202112000-00003. [PMID: 34860733 DOI: 10.5435/jaaosglobal-d-21-00172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 10/18/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVES The goal of this investigation was to determine the incidence of complications and revision surgery after calcaneal tuberosity avulsion fractures, to describe experience with different fixation constructs, and to compare revision surgery rates between tuberosity and tongue-type fractures of the calcaneus. DESIGN This was a retrospective study at a single level 1 trauma center between 2001 and 2019, including patients with calcaneal tuberosity avulsion fractures compared with patients with calcaneal tongue-type fractures. RESULTS Twenty-nine tuberosity fractures (23 surgical and six nonsurgical) and 37 tongue-type fractures (29 surgical and eight nonsurgical) were treated during the study period. Revision surgery was more common in the tuberosity group (26% versus 7%, P = 0.013). In the tuberosity group, 35% experienced some degree of implant failure, with 13% catastrophic loss of reduction and 22% loss of initial reduction with eventual union. Fragment size and initial displacement were not associated with revision surgery. No patients with implant failure noted in the tongue-type group. DISCUSSION Calcaneal tuberosity fractures showed significantly higher rate of revision surgery and failure of fixation compared with tongue-type fractures.
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Affiliation(s)
- Michael Doany
- From the Department of Orthopaedic Surgery, Stony Brook University Hospital, Stony Brook, NY
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Connor C, Hamilton J, Robison L, Hadjiargyrou M, Komatsu D, Thanos P. Abstinence from chronic methylphenidate exposure modifies cannabinoid receptor 1 levels in the brain in a dose-dependent manner. Curr Pharm Des 2021; 28:331-338. [PMID: 33504296 DOI: 10.2174/1381612827666210127120411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 08/06/2020] [Accepted: 12/06/2020] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Methylphenidate (MP) is a widely used psychostimulant prescribed for Attention Deficit Hyperactivity Disorder, and is also used illicitly by healthy individuals. Chronic exposure to MP has been shown to affect physiology, behavior, and neurochemistry. METHODS The present study examined its effect on the endocannabinoid system. Adolescent rats had daily oral access to either water (control), low dose MP (4/10 mg/kg), or high dose MP (30/60 mg/kg). After 13 weeks of exposure, half of the rats in each group were euthanized, however the remaining rats underwent a four-week long abstinence period. Cannabinoid receptor 1 binding (CB1) was measured with in vitro autoradiography using [3H] SR141716A. RESULTS Rats who underwent a 4-week abstinence period after exposure to chronic HD MP showed increased binding compared to rats with no abstinence period in several cortical and basal ganglia regions of the brain. In contrast to this, rats who underwent a 4-week abstinence period after exposure to chronic LD MP showed lower binding compared to rats with no abstinence period in mainly the basal ganglia regions and in the hindlimb region of the somatosensory cortex. Following 4 weeks of drug abstinence, rats who were previously given HD MP showed higher [ 3H] SR141716A binding than rats given LD MP in many of the cortical and basal ganglia regions examined. These results highlight biphasic effects of MP treatment on cannabinoid receptor levels. Abstinence from HD MP seemed to increase CB1 receptor levels while abstinence from LD MP seemed to decrease CB1 levels. CONCLUSION Given the prolific expression of cannabinoid receptors throughout the brain, many types of behaviors may be affected as a result of MP abstinence. Further research will be needed to help identify these behavioral changes.
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Affiliation(s)
- Carly Connor
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biosciences, University at Buffalo, Buffalo, NY. United States
| | - John Hamilton
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biosciences, University at Buffalo, Buffalo, NY. United States
| | - Lisa Robison
- Department of Neuroscience and Experimental Techniques, Albany Medical College, Albany, NY. United States
| | - Michael Hadjiargyrou
- Department of Life Sciences, New York Institute of Technology, Old Westbury, NY. United States
| | - David Komatsu
- Department of Orthopedics, Stony Brook University, Stony Brook, NY. United States
| | - Panayotis Thanos
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biosciences, University at Buffalo, Buffalo, NY. United States
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Jalloh K, Roeder N, Hamilton J, Delis F, Hadjiargyrou M, Komatsu D, Thanos PK. Chronic oral methylphenidate treatment in adolescent rats promotes dose-dependent effects on NMDA receptor binding. Life Sci 2021; 264:118708. [PMID: 33186568 DOI: 10.1016/j.lfs.2020.118708] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/21/2020] [Accepted: 10/29/2020] [Indexed: 11/17/2022]
Abstract
AIM Examine the effects of chronic oral Methylphenidate (MP) treatment on the N-Methyl-D-aspartic acid (NMDA) glutamate receptor binding in the rat brain using a previously established drinking paradigm that has been shown to deliver MP with similar pharmacokinetic profile as observed clinically. MAIN METHODS Briefly, rats were divided into three treatment groups of water, low dose MP (LD; 4/10 mg/kg), or high dose MP (HD; 30/60 mg/kg). Following a 3-month treatment period, some rats were sacrificed while others went through an additional 1-month abstinence period before they were sacrificed. In vitro autoradiography (ARG) was carried out using [3H] MK801 to examine NMDA receptor binding in the brain. KEY FINDINGS The dose-dependent effects of MP following 13 weeks of treatment on [3H] MK-801 binding were seen across the brain in the following regions: prelimbic, insular, secondary motor, primary motor, retrosplenial, rhinal, piriform, auditory, visual, dorsolateral striatum, nucleus accumbens core, hippocampus, amygdala, and thalamic regions. No differences were observed in [3H] MK-801 binding levels in animals that underwent the same treatment followed by a 4 week abstinence. SIGNIFICANCE These results demonstrate that chronic MP treatment altered NMDA receptor expression throughout the brain, which in turn may impact an individual's drug-seeking behavior, fear memory formation and overall activity. However, these effects of chronic MP were eliminated following cessation of treatment.
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Affiliation(s)
- Khadija Jalloh
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Nicole Roeder
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA; Department of Psychology, University at Buffalo, Buffalo, NY, USA
| | - John Hamilton
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA; Department of Psychology, University at Buffalo, Buffalo, NY, USA
| | - Foteini Delis
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece
| | - Michael Hadjiargyrou
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY, USA
| | - David Komatsu
- Department of Orthopedics, Stony Brook University, Stony Brook, NY, USA
| | - Panayotis K Thanos
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA; Department of Psychology, University at Buffalo, Buffalo, NY, USA.
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Carias E, Hamilton J, Robison LS, Delis F, Eiden R, Quattrin T, Hadjiargyrou M, Komatsu D, Thanos PK. Chronic oral methylphenidate treatment increases microglial activation in rats. J Neural Transm (Vienna) 2018; 125:1867-1875. [PMID: 30238340 DOI: 10.1007/s00702-018-1931-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 07/17/2018] [Accepted: 09/17/2018] [Indexed: 12/18/2022]
Abstract
Methylphenidate (MP) is a widely prescribed psychostimulant used to treat attention deficit hyperactivity disorder. Previously, we established a drinking paradigm to deliver MP to rats at doses that result in pharmacokinetic profiles similar to treated patients. In the present study, adolescent male rats were assigned to one of three groups: control (water), low-dose MP (LD; 4/10 mg/kg), and high dose MP (HD; 30/60 mg/kg). Following 3 months of treatment, half of the rats in each group were euthanized, and the remaining rats received only water throughout a 1-month-long abstinence phase. In vitro autoradiography using [3H] PK 11195 was performed to measure microglial activation. HD MP rats showed increased [3H] PK 11195 binding compared to control rats in several cerebral cortical areas: primary somatosensory cortex including jaw (68.6%), upper lip (80.1%), barrel field (88.9%), and trunk (78%) regions, forelimb sensorimotor area (87.3%), secondary somatosensory cortex (72.5%), motor cortices 1 (73.2%) and 2 (69.3%), insular cortex (59.9%); as well as subcortical regions including the thalamus (62.9%), globus pallidus (79.4%) and substantia nigra (22.7%). Additionally, HD MP rats showed greater binding compared to LD MP rats in the hippocampus (60.6%), thalamus (59.6%), substantia nigra (38.5%), and motor 2 cortex (55.3%). Following abstinence, HD MP rats showed no significant differences compared to water controls; however, LD MP rats showed increased binding in pre-limbic cortex (78.1%) and ventromedial caudate putamen (113.8%). These findings indicate that chronic MP results in widespread microglial activation immediately after treatment and following the cessation of treatment in some brain regions.
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Affiliation(s)
- Emily Carias
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, 1021 Main St., Buffalo, NY, USA
| | - John Hamilton
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, 1021 Main St., Buffalo, NY, USA
| | - Lisa S Robison
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, 47 New Scotland Ave., Albany, NY, USA
| | - Foteini Delis
- Department of Pharmacology, Medical School, University of Ioannina, 45110, Ioannina, Greece
| | - Rina Eiden
- Department of Psychology, University at Buffalo, 1021 Main St., Buffalo, NY, USA
| | - Teresa Quattrin
- Women and Children's Hospital of Buffalo, Department of Pediatrics, School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Michael Hadjiargyrou
- Department of Life Sciences, New York Institute of Technology, Northern Blvd., Old Westbury, NY, USA
| | - David Komatsu
- Department of Orthopedics, Stony Brook University, 100 Nicolls Rd., Stony Brook, NY, USA
| | - Panayotis K Thanos
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, 1021 Main St., Buffalo, NY, USA.
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Nonomura K, Komatsu D, Yoshida T, Minoura H, Schlettwein D. Dependence of the photoelectrochemical performance of sensitised ZnO on the crystalline orientation in electrodeposited ZnO thin films. Phys Chem Chem Phys 2007; 9:1843-9. [PMID: 17415497 DOI: 10.1039/b617986j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The influence of the crystal orientation in porous crystalline films of ZnO electrodeposited on the photoelectrochemical characteristics of the films is studied. For differently oriented ZnO thin films following removal of the respective structure-directing agent (SDA) and adsorption of a sensitiser, time-resolved photocurrent measurements, intensity modulated photocurrent spectroscopy (IMPS), intensity modulated photovoltage spectroscopy (IMVS) and current-voltage curves were measured in acetonitrile-based electrolytes containing I(3)(-)/I(-) as the redox electrolyte. The crystal orientation has a significant influence on the charge transport across such films and hence is reflected in the observed electrode kinetics. Films originally grown in the presence of, e.g., Coumarin 343 as a SDA, showed a significantly faster response to illumination. Increased electron diffusion coefficients and diffusion lengths were calculated from the results of IMPS and IMVS, caused by a faster electron movement in the films. Implications of these findings on further improvements of sensitised ZnO films prepared by electrochemical deposition are discussed.
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Affiliation(s)
- K Nonomura
- Institute of Applied Physics, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany
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Lombardo F, Komatsu D, Hadjiargyrou M. Molecular cloning and characterization of Mustang, a novel nuclear protein expressed during skeletal development and regeneration. FASEB J 2004; 18:52-61. [PMID: 14718386 DOI: 10.1096/fj.03-0521com] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Bone regeneration occurs as a series of events that requires temporal and spatial orchestration of numerous cell types guided by the transcriptional activity of thousands of genes, as recently demonstrated by our laboratory. Using the rat femoral fracture model, bioinformatics, cloning, expression assays, fusion proteins, and transfection, we report on the identification and characterization of one such differentially expressed gene, termed Mustang (musculoskeletal temporally activated novel gene). Mustang encodes for an 82 amino acid nuclear protein with no homology to any known protein family. However, other species homologues (mouse, human, cow) were identified within EST (expressed sequence tag) databases. Nuclear localization was confirmed using a GFP-Mustang fusion protein. Using in situ hybridization, Mustang expression was localized to differentiating periosteal osteogenic cells, proliferating chondrocytes, and osteoblasts of the fracture callus. Unlike adult tissues, developing embryos abundantly express Mustang, especially in mesenchymal condensations of limbs, vertebral perichondrium, and mesenchymal cells of the intervertebral discs. Although the precise function of Mustang is unknown, its unique pattern of expression during bone development and regeneration, absence in adult tissues (except skeletal muscle and tendon), and nuclear localization suggest that Mustang is involved in the development and regeneration of the mammalian musculoskeletal system.
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Affiliation(s)
- Frank Lombardo
- Department of Biomedical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794-2580, USA
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