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Chen YH, Kuo TT, Wang V, Cheng PW, Huang EYK, Ma KH, Greig NH, Olson L, Hoffer BJ, Tseng KY. Serotonergic Regulation of Synaptic Dopamine Levels Mitigates L-DOPA-Induced Dyskinesia in a Mouse Model of Parkinson's Disease. JOURNAL OF PARKINSON'S DISEASE 2024; 14:941-964. [PMID: 38905058 PMCID: PMC11307072 DOI: 10.3233/jpd-240080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/20/2024] [Indexed: 06/23/2024]
Abstract
Background The serotonin (5-HT) system can manipulate the processing of exogenous L-DOPA in the DA-denervated striatum, resulting in the modulation of L-DOPA-induced dyskinesia (LID). Objective To characterize the effects of the serotonin precursor 5-hydroxy-tryptophan (5-HTP) or the serotonin transporter (SERT) inhibitor, Citalopram on L-DOPA-induced behavior, neurochemical signals, and underlying protein expressions in an animal model of Parkinson's disease. Methods MitoPark (MP) mice at 20 weeks of age, subjected to a 14-day administration of L-DOPA/Carbidopa, displayed dyskinesia, referred to as LID. Subsequent investigations explored the effects of 5-HT-modifying agents, such as 5-HTP and Citalopram, on abnormal involuntary movements (AIMs), locomotor activity, neurochemical signals, serotonin transporter activity, and protein expression in the DA-denervated striatum of LID MP mice. Results 5-HTP exhibited duration-dependent suppressive effects on developing and established LID, especially related to abnormal limb movements observed in L-DOPA-primed MP mice. However, Citalopram, predominantly suppressed abnormal axial movement induced by L-DOPA in LID MP mice. We demonstrated that 5-HTP could decrease L-DOPA-upregulation of DA turnover rates while concurrently upregulating 5-HT metabolism. Additionally, 5-HTP was shown to reduce the expressions of p-ERK and p-DARPP-32 in the striatum of LID MP mice. The effect of Citalopram in alleviating LID development may be attributed to downregulation of SERT activity in the dorsal striatum of LID MP mice. Conclusions While both single injection of 5-HTP and Citalopram effectively mitigated the development of LID, the difference in mitigation of AIM subtypes may be linked to the unique effects of these two serotonergic agents on L-DOPA-derived DA and 5-HT metabolism.
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Affiliation(s)
- Yuan-Hao Chen
- Department of Neurological Surgery, Tri-Service General Hospital, Taipei, Taiwan
- National Defense Medical Center, Taipei, Taiwan
| | - Tung-Tai Kuo
- Department of Neurological Surgery, Tri-Service General Hospital, Taipei, Taiwan
- Department of Pharmacology, National Defense Medical Center, Taipei, Taiwan
| | - Vicki Wang
- Doctoral Degree Program in Translational Medicine, National Defense Medical Center and Academia Sinica, Taipei, Taiwan
| | - Pin-Wen Cheng
- Department of Neurological Surgery, Tri-Service General Hospital, Taipei, Taiwan
| | | | - Kuo-Hsing Ma
- Graduate Institute of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan
| | - Nigel H. Greig
- Drug Design & Development Section, Translational Gerontology Branch, Intramural Research Program National Institute on Aging, National Institutes of Health (NIH), Baltimore, MD, USA
| | - Lars Olson
- Department of Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Barry J. Hoffer
- Department of Neurosurgery, University Hospitals of Cleveland, Cleveland, OH, USA
| | - Kuan-Yin Tseng
- Department of Neurological Surgery, Tri-Service General Hospital, Taipei, Taiwan
- National Defense Medical Center, Taipei, Taiwan
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van Wamelen DJ, Leta V, Chaudhuri KR, Jenner P. Future Directions for Developing Non-dopaminergic Strategies for the Treatment of Parkinson's Disease. Curr Neuropharmacol 2024; 22:1606-1620. [PMID: 37526188 PMCID: PMC11284721 DOI: 10.2174/1570159x21666230731110709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/04/2023] [Accepted: 04/10/2023] [Indexed: 08/02/2023] Open
Abstract
The symptomatic treatment of Parkinson's disease (PD) has been dominated by the use of dopaminergic medication, but significant unmet need remains, much of which is related to non-motor symptoms and the involvement of non-dopaminergic transmitter systems. As such, little has changed in the past decades that has led to milestone advances in therapy and significantly improved treatment paradigms and patient outcomes, particularly in relation to symptoms unresponsive to levodopa. This review has looked at how pharmacological approaches to treatment are likely to develop in the near and distant future and will focus on two areas: 1) novel non-dopaminergic pharmacological strategies to control motor symptoms; and 2) novel non-dopaminergic approaches for the treatment of non-motor symptoms. The overall objective of this review is to use a 'crystal ball' approach to the future of drug discovery in PD and move away from the more traditional dopamine-based treatments. Here, we discuss promising non-dopaminergic and 'dirty drugs' that have the potential to become new key players in the field of Parkinson's disease treatment.
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Affiliation(s)
- Daniel J. van Wamelen
- Department of Neuroimaging, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, United Kingdom
- Department of Basic & Clinical Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, United Kingdom
- Parkinson Foundation Centre of Excellence at King’s College Hospital NHS Foundation Trust, London, United Kingdom
- Department of Neurology, Centre of Expertise for Parkinson & Movement Disorders, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Valentina Leta
- Department of Basic & Clinical Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, United Kingdom
- Parkinson Foundation Centre of Excellence at King’s College Hospital NHS Foundation Trust, London, United Kingdom
| | - K. Ray Chaudhuri
- Department of Basic & Clinical Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, United Kingdom
- Parkinson Foundation Centre of Excellence at King’s College Hospital NHS Foundation Trust, London, United Kingdom
| | - Peter Jenner
- School of Cancer & Pharmaceutical Sciences, Institute of Pharmaceutical Science, King’s College London, London, United Kingdom
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3
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Lipari N, Centner A, Glinski J, Cohen S, Manfredsson FP, Bishop C. Characterizing the relationship between L-DOPA-induced-dyskinesia and psychosis-like behaviors in a bilateral rat model of Parkinson's disease. Neurobiol Dis 2023; 176:105965. [PMID: 36526089 DOI: 10.1016/j.nbd.2022.105965] [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: 10/12/2022] [Revised: 11/30/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022] Open
Abstract
Parkinson's disease associated psychosis (PDAP) is a prevalent non-motor symptom (NMS) that significantly erodes patients' and caregivers' quality of life yet remains vastly understudied. One potential source of PDAP in late-stage Parkinson's disease (PD) is the common dopamine (DA) replacement therapy for motor symptoms, Levodopa (L-DOPA). Given the high incidence of L-DOPA-induced dyskinesia (LID) in later phases of PD, this study sought to characterize the relationship between PDAP and LID in a bilateral medial forebrain bundle 6-hydroxydopamine hydrobromide (6-OHDA) lesion rat model. To assess PDAP in this model, prepulse inhibition (PPI), a well-validated assay of sensorimotor gating, was employed. First, we tested whether a bilateral lesion alone or after chronic L-DOPA treatment was sufficient to induce PPI dysfunction. Rats were also monitored for LID development, using the abnormal involuntary movements (AIMs) test, to examine PPI and LID associations. In experiment 2, Vilazodone (VZD), a serotonin transporter (SERT) blocker and 1A receptor (5-HT1A) partial agonist was administered to test its potential efficacy in reducing LID and PPI dysfunction. Once testing was complete, tissue was collected for high performance liquid chromatography (HPLC) to examine the monoamine levels in motor and non-motor circuits. Results indicate that bilateral DA lesions produced motor deficits and that chronic L-DOPA induced moderate AIMs; importantly, rats that developed more severe AIMs were more likely to display sensorimotor gating dysfunction. In addition, VZD treatment dose-dependently reduced L-DOPA-induced AIMs without impairing L-DOPA efficacy, although VZD's effects on PPI were limited. Altogether, this project established the bilateral 6-OHDA lesion model accurately portrayed LID and PDAP-like behaviors, uncovered their potential relationship, and finally, demonstrated the utility of VZD for reducing LID.
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Affiliation(s)
- Natalie Lipari
- Department of Psychology, Binghamton University, Binghamton, NY, USA
| | - Ashley Centner
- Department of Psychology, Binghamton University, Binghamton, NY, USA
| | - John Glinski
- Department of Psychology, Binghamton University, Binghamton, NY, USA
| | - Sophie Cohen
- Department of Psychology, Binghamton University, Binghamton, NY, USA
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Lazarova M, Tancheva L, Chayrov R, Tzvetanova E, Alexandrova A, Popatanasov A, Uzunova D, Stefanova M, Stankova I, Kalfin R. Tyrosinyl-amantadine: A New Amantadine Derivative With an Ameliorative Effect in a 6-OHDA Experimental Model of Parkinson's Disease in Rats. J Mol Neurosci 2022; 72:900-909. [PMID: 35091981 DOI: 10.1007/s12031-021-01964-x] [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: 12/21/2021] [Accepted: 12/30/2021] [Indexed: 10/19/2022]
Abstract
The neuroprotective capacity of newly synthesized amantadine derivative tyrosinyl-amantadine (Tyr-Am) with expected antiparkinsonian properties was evaluated in a 6-hydroxydopamine (6-OHDA) model of Parkinson's disease. Male Wistar rats were divided into the following groups: sham-operated (SO), striatal 6-OHDA-lesioned control group, 6-OHDA-lesioned rats pretreated for 6 days with Tyr-Am (16 mg/kg administered intraperitoneally, i.p.), and 6-OHDA-lesioned rats pretreated for 6 days with amantadine (40 mg/kg i.p.), used as a referent. On the first, second and third week post-lesion, the animals were subjected to some behavioral tests (apomorphine-induced rotation, rotarod, and passive avoidance test). The acetylcholinesterase (AChE) activity and key oxidative stress parameters including lipid peroxidation levels (LPO) and superoxide dismutase (SOD) were measured in brain homogenates. The results showed that the neuroprotective effect of Tyr-Am was comparable to that of amantadine, improving neuromuscular coordination and learning and memory performance even at a 2.5-fold lower dose. Tyr-Am demonstrated significant antioxidant properties via decreased LPO levels but had no effect on AChE activity. We can conclude that the newly synthesized amantadine derivative Tyr-Am demonstrated significant antiparkinsonian activity in a 6-OHDA experimental model.
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Affiliation(s)
- Maria Lazarova
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Block 23, Sofia,, 1113, Bulgaria.
| | - Lyubka Tancheva
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Block 23, Sofia,, 1113, Bulgaria
| | - Radoslav Chayrov
- Department of Chemistry, South-West University "Neofit Rilski", Ivan Mihailov St. 66, Blagoevgrad,, 2700, Bulgaria
| | - Elina Tzvetanova
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Block 23, Sofia,, 1113, Bulgaria
| | - Albena Alexandrova
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Block 23, Sofia,, 1113, Bulgaria
| | - Andrey Popatanasov
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Block 23, Sofia,, 1113, Bulgaria
| | - Diamara Uzunova
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Block 23, Sofia,, 1113, Bulgaria
| | - Miroslava Stefanova
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Block 23, Sofia,, 1113, Bulgaria
| | - Ivanka Stankova
- Department of Chemistry, South-West University "Neofit Rilski", Ivan Mihailov St. 66, Blagoevgrad,, 2700, Bulgaria
| | - Reni Kalfin
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Block 23, Sofia,, 1113, Bulgaria.,Faculty of Public Health, Healthcare and Sport, South-West University "Neofit Rilski", Ivan Mihailov St. 66, Blagoevgrad,, 2700, Bulgaria
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Wichit P, Thanprasertsuk S, Phokaewvarangkul O, Bhidayasiri R, Bongsebandhu-Phubhakdi S. Monoamine Levels and Parkinson's Disease Progression: Evidence From a High-Performance Liquid Chromatography Study. Front Neurosci 2021; 15:605887. [PMID: 34393700 PMCID: PMC8358115 DOI: 10.3389/fnins.2021.605887] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 06/24/2021] [Indexed: 12/03/2022] Open
Abstract
Parkinson’s disease (PD) is associated with dysfunction of monoamine neurotransmitter systems. We investigated changes in the levels of monoamine and their metabolites in PD patients, together with their association to clinical profiles. PD patients and age-matched control subjects (n = 40 per group) were enrolled. Using high-performance liquid chromatography (HPLC) with an electrochemical detector, levels of monoamines (dopamine, DA; norepinephrine, NE; epinephrine, EPI; and serotonin, 5-HT) were measured in plasma, while the metabolites (homovanillic acid, HVA; vanillylmandelic acid, VMA; and 5-hydroxyindoleacetic acid, 5-HIAA) were measured in urine. Plasma DA level was not significantly different between PD and control groups. PD patients had significantly higher plasma NE but lower EPI and 5-HT levels. PD patients had a significantly higher HVA/DA ratio and lower VMA/NE ratio than control subjects, while the 5-HIAA/5-HT ratio was not different between the groups. Regarding the association between monoamine levels and clinical profiles, the DA level had a negative relationship with disease duration and the 5-HT level had a negative relationship with severity of motor impairment. These findings emphasized the involvements of several neurotransmission systems and their association with clinical profiles in PD patients, demonstrated by quantification of monoamine levels in peripheral body fluids. This could benefit appropriate pharmacological treatment planning in respect of monoamine changes and might also help predict subsequent clinical symptoms.
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Affiliation(s)
- Patsorn Wichit
- Department of Physiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,Faculty of Physical Therapy, Huachiew Chalermprakiet University, Bang Phli, Thailand
| | - Sekh Thanprasertsuk
- Department of Physiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,Chulalongkorn Cognitive Clinical and Computational Neuroscience Special Task Force Research Group, Chulalongkorn University, Bangkok, Thailand.,Chula Neuroscience Center, King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Bangkok, Thailand
| | - Onanong Phokaewvarangkul
- Chula Neuroscience Center, King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Bangkok, Thailand.,Chulalongkorn Centre of Excellence for Parkinson's Disease & Related Disorders, King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Bangkok, Thailand.,Division of Neurology, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Roongroj Bhidayasiri
- Chula Neuroscience Center, King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Bangkok, Thailand.,Chulalongkorn Centre of Excellence for Parkinson's Disease & Related Disorders, King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Bangkok, Thailand.,Division of Neurology, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Saknan Bongsebandhu-Phubhakdi
- Department of Physiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,Chula Neuroscience Center, King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Bangkok, Thailand
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6
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Walker M, Kuebler L, Goehring CM, Pichler BJ, Herfert K. Imaging SERT Availability in a Rat Model of L-DOPA-Induced Dyskinesia. Mol Imaging Biol 2021; 22:634-642. [PMID: 31392531 DOI: 10.1007/s11307-019-01418-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
PURPOSE The development of L-DOPA-induced dyskinesia (LID) is one of the most severe side effects of chronic L-DOPA treatment in Parkinson's disease patients. [11C]DASB positron emission tomography (PET) provides a prominent tool to visualize and quantify serotonin transporter (SERT) pathology in vivo in patients and in animal models. To evaluate the effect of chronic L-DOPA treatment on SERT availability in an animal model of LID, we performed a longitudinal PET study. PROCEDURES Rats received a unilateral 6-hydroxydopamine (6-OHDA) lesion, and striatal and extrastriatal SERT expression levels were studied with [11C]DASB, a marker of SERT availability, before and after daily treatment with L-DOPA. Dyskinesias were evaluated at different time points over a period of 21 days. RESULTS [11C]DASB binding was found to be decreased after 6-OHDA lesions in the striatum, cortex, and hippocampus 5 weeks after 6-OHDA injection in the lesioned hemisphere of the rat brain. Chronic L-DOPA priming resulted in a relative preservation of SERT availability in the lesioned and healthy hemisphere compared to baseline measurements. CONCLUSIONS Our longitudinal PET data support a preservation of SERT availability after the induction of L-DOPA-induced dyskinesia, which is in line with previous reports in dyskinetic PD patients.
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Affiliation(s)
- Michael Walker
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard-Karls University of Tuebingen, Röntgenweg 13, Tuebingen, Germany
| | - Laura Kuebler
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard-Karls University of Tuebingen, Röntgenweg 13, Tuebingen, Germany
| | - Chris Marc Goehring
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard-Karls University of Tuebingen, Röntgenweg 13, Tuebingen, Germany
| | - Bernd J Pichler
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard-Karls University of Tuebingen, Röntgenweg 13, Tuebingen, Germany
| | - Kristina Herfert
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard-Karls University of Tuebingen, Röntgenweg 13, Tuebingen, Germany.
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Fu JF, Matarazzo M, McKenzie J, Neilson N, Vafai N, Dinelle K, Felicio AC, McKeown MJ, Stoessl AJ, Sossi V. Serotonergic System Impacts Levodopa Response in Early Parkinson's and Future Risk of Dyskinesia. Mov Disord 2020; 36:389-397. [PMID: 33090574 DOI: 10.1002/mds.28340] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/31/2020] [Accepted: 10/03/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The serotonergic system is known to contribute to levodopa-derived dopamine release in advanced Parkinson's disease. OBJECTIVE We investigated the role of the serotonergic system in determining response to treatment in early disease and risk for complications concurrently with dopaminergic alterations. METHODS Eighteen patients with early and stable Parkinson's disease underwent multitracer positron emission tomography using [11 C]dihydrotetrabenazine (vesicular monoamine transporter 2 marker), [11 C]methylphenidate (dopamine transporter marker), [11 C]-3-amino-4-(2-dimethylaminomethylphenylsulfanyl)-benzonitrile (DASB, serotonin transporter marker), and [11 C]raclopride (D2 marker) to investigate relationships between striatal dopaminergic and serotonergic alterations and levodopa-induced dopamine release, related to motor response to treatment and risk for dyskinesias, using a novel joint pattern analysis. RESULTS The joint pattern analysis revealed correlated spatial patterns conceptually related to abnormal dopamine turnover in the putamen (higher dopamine release associated with dopaminergic and serotonergic denervation); response to treatment significantly inversely correlated with turnover-related dopamine release (P < 10-5 ). Patterns identified without inclusion of the DASB data showed no correlation with clinical data, indicating an important contribution from the serotonergic system to a clinically relevant abnormal dopamine release in early disease. Subjects who experienced dyskinesia 3 years after baseline scans showed higher turnover-related dopamine release compared with subjects who remained stable (P < 0.01). CONCLUSIONS Joint analysis of dopaminergic and serotonergic data identified a turnover-related dopamine release component, strongly related to motor response to levodopa in early disease and contributing to higher risk for dyskinesia. These findings suggest that the contribution of the serotonergic system to dopamine release not only increases the risk for motor complications but also fails to provide sustained therapeutic advantage in early disease. © 2020 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Jessie F Fu
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada
| | - Michele Matarazzo
- Djavad Mowafaghian Centre for Brain Health, Pacific Parkinson's Research Centre, University of British Columbia & Vancouver Coastal Health, Vancouver, British Columbia, Canada
| | - Jessamyn McKenzie
- Djavad Mowafaghian Centre for Brain Health, Pacific Parkinson's Research Centre, University of British Columbia & Vancouver Coastal Health, Vancouver, British Columbia, Canada
| | - Nicole Neilson
- Djavad Mowafaghian Centre for Brain Health, Pacific Parkinson's Research Centre, University of British Columbia & Vancouver Coastal Health, Vancouver, British Columbia, Canada
| | - Nasim Vafai
- Djavad Mowafaghian Centre for Brain Health, Pacific Parkinson's Research Centre, University of British Columbia & Vancouver Coastal Health, Vancouver, British Columbia, Canada
| | - Katie Dinelle
- Djavad Mowafaghian Centre for Brain Health, Pacific Parkinson's Research Centre, University of British Columbia & Vancouver Coastal Health, Vancouver, British Columbia, Canada
| | - Andre C Felicio
- Department of Neurology, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Martin J McKeown
- Djavad Mowafaghian Centre for Brain Health, Pacific Parkinson's Research Centre, University of British Columbia & Vancouver Coastal Health, Vancouver, British Columbia, Canada.,Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - A Jon Stoessl
- Djavad Mowafaghian Centre for Brain Health, Pacific Parkinson's Research Centre, University of British Columbia & Vancouver Coastal Health, Vancouver, British Columbia, Canada.,Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Vesna Sossi
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada.,Djavad Mowafaghian Centre for Brain Health, Pacific Parkinson's Research Centre, University of British Columbia & Vancouver Coastal Health, Vancouver, British Columbia, Canada
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8
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Globus pallidus, but not entopeduncular nucleus, 6-OHDA-induced lesion attenuates L-Dopa-induced dyskinesia in the rat model of Parkinson's disease. Pharmacol Biochem Behav 2020; 197:173013. [DOI: 10.1016/j.pbb.2020.173013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/31/2020] [Accepted: 08/01/2020] [Indexed: 12/27/2022]
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9
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Striatal Nurr1 Facilitates the Dyskinetic State and Exacerbates Levodopa-Induced Dyskinesia in a Rat Model of Parkinson's Disease. J Neurosci 2020; 40:3675-3691. [PMID: 32238479 DOI: 10.1523/jneurosci.2936-19.2020] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 03/13/2020] [Accepted: 03/19/2020] [Indexed: 12/23/2022] Open
Abstract
The transcription factor Nurr1 has been identified to be ectopically induced in the striatum of rodents expressing l-DOPA-induced dyskinesia (LID). In the present study, we sought to characterize Nurr1 as a causative factor in LID expression. We used rAAV2/5 to overexpress Nurr1 or GFP in the parkinsonian striatum of LID-resistant Lewis or LID-prone Fischer-344 (F344) male rats. In a second cohort, rats received the Nurr1 agonist amodiaquine (AQ) together with l-DOPA or ropinirole. All rats received a chronic DA agonist and were evaluated for LID severity. Finally, we performed single-unit recordings and dendritic spine analyses on striatal medium spiny neurons (MSNs) in drug-naïve rAAV-injected male parkinsonian rats. rAAV-GFP injected LID-resistant hemi-parkinsonian Lewis rats displayed mild LID and no induction of striatal Nurr1 despite receiving a high dose of l-DOPA. However, Lewis rats overexpressing Nurr1 developed severe LID. Nurr1 agonism with AQ exacerbated LID in F344 rats. We additionally determined that in l-DOPA-naïve rats striatal rAAV-Nurr1 overexpression (1) increased cortically-evoked firing in a subpopulation of identified striatonigral MSNs, and (2) altered spine density and thin-spine morphology on striatal MSNs; both phenomena mimicking changes seen in dyskinetic rats. Finally, we provide postmortem evidence of Nurr1 expression in striatal neurons of l-DOPA-treated PD patients. Our data demonstrate that ectopic induction of striatal Nurr1 is capable of inducing LID behavior and associated neuropathology, even in resistant subjects. These data support a direct role of Nurr1 in aberrant neuronal plasticity and LID induction, providing a potential novel target for therapeutic development.SIGNIFICANCE STATEMENT The transcription factor Nurr1 is ectopically induced in striatal neurons of rats exhibiting levodopa-induced dyskinesia [LID; a side-effect to dopamine replacement strategies in Parkinson's disease (PD)]. Here we asked whether Nurr1 is causing LID. Indeed, rAAV-mediated expression of Nurr1 in striatal neurons was sufficient to overcome LID-resistance, and Nurr1 agonism exacerbated LID severity in dyskinetic rats. Moreover, we found that expression of Nurr1 in l-DOPA naïve hemi-parkinsonian rats resulted in the formation of morphologic and electrophysiological signatures of maladaptive neuronal plasticity; a phenomenon associated with LID. Finally, we determined that ectopic Nurr1 expression can be found in the putamen of l-DOPA-treated PD patients. These data suggest that striatal Nurr1 is an important mediator of the formation of LID.
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10
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Purcaro C, Vanacore N, Moret F, Di Battista ME, Rubino A, Pierandrei S, Lucarelli M, Meco G, Fattapposta F, Pascale E. DAT gene polymorphisms (rs28363170, rs393795) and levodopa-induced dyskinesias in Parkinson's disease. Neurosci Lett 2018; 690:83-88. [PMID: 30316985 DOI: 10.1016/j.neulet.2018.10.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/09/2018] [Accepted: 10/10/2018] [Indexed: 01/19/2023]
Abstract
L-dopa-induced dyskinesias (LID) is a common motor side effect of levodopa therapy of Parkinson's disease (PD). The identified predictors may only partially account for the risk of developing LID and genetic factors may contribute to this variability. The present study is aimed to investigate whether polymorphisms in the dopamine transporter gene (DAT) are associated with the risk of developing LID. Genotyping of the 40-bp VNTR (rs28363170) and rs393795 (A/C) polymorphisms of the DAT gene was performed in a well-characterized cohort of 181 Italian PD patients in treatment with L-DOPA for 3 years or more. The results of our study show that there is no difference in dyskinesias prevalence among carriers of the two DAT gene polymorphisms. However, the combination of the two genotypes 10R/10R (rs28363170) and A carrier (rs393795) of the DAT gene reduces the risk of LID occurrence during long-term therapy with l-DOPA with respect to the PD subjects who did not carry these alleles (OR = 0.31; 95% CI, 0.09-0.88). Also based on a logistic regression analysis, the 10R/10R and the A carrier allele of the rs393795 polymorphisms of the DAT gene, could reduce the susceptibility to develop LID during levodopa therapy adjusted by demographical and clinical variables (OR = 0.19; 95% CI, 0.05-0.69). Additional studies further investigating the rs28363170 and rs393795 polymorphisms with LID in PD are needed to clarify their role in different ethnicities.
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Affiliation(s)
- Carlo Purcaro
- Department of Human Neurosciences, Sapienza University, Rome, Italy
| | - Nicola Vanacore
- National Center for Disease Prevention and Health Promotion, National Institute of Health, Rome, Italy
| | - Federica Moret
- Department of Human Neurosciences, Sapienza University, Rome, Italy
| | | | - Alfonso Rubino
- Department of Human Neurosciences, Sapienza University, Rome, Italy
| | - Silvia Pierandrei
- Department of Cellular Biotechnologies and Hematology, Sapienza University, Rome, Italy
| | - Marco Lucarelli
- Department of Cellular Biotechnologies and Hematology, Sapienza University, Rome, Italy
| | - Giuseppe Meco
- Research Centre of Social Diseases (CIMS), Sapienza University, Rome, Italy
| | | | - Esterina Pascale
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University, Rome, Italy.
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Gagnon D, Eid L, Coudé D, Whissel C, Di Paolo T, Parent A, Parent M. Evidence for Sprouting of Dopamine and Serotonin Axons in the Pallidum of Parkinsonian Monkeys. Front Neuroanat 2018; 12:38. [PMID: 29867377 PMCID: PMC5963193 DOI: 10.3389/fnana.2018.00038] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 04/25/2018] [Indexed: 12/25/2022] Open
Abstract
This light and electron microscopie immunohistochemical quantitative study aimed at determining the state of the dopamine (DA) and serotonin (5-HT) innervations of the internal (GPi) and external (GPe) segments of the pallidum in cynomolgus monkeys (Macaca fascicularis) rendered parkinsonian by systemic injections of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). In contrast to the prominent DA denervation of striatum, the GPi in MPTP monkeys was found to be markedly enriched in DA (TH+) axon varicosities. The posterior sensorimotor region of this major output structure of the basal ganglia was about 8 times more intensely innervated in MPTP monkeys (0.71 ± 0.08 × 106 TH+ axon varicosities/mm3) than in controls (0.09 ± 0.01 × 106). MPTP intoxication also induced a two-fold increase in the density of 5-HT (SERT+) axon varicosities in both GPe and GPi. This augmentation was particularly pronounced anteriorly in the so-called associative and limbic pallidal territories. The total length of the labeled pallidal axons was also significantly increased in MPTP monkeys compared to controls, but the number of DA and 5-HT axon varicosities per axon length unit remained the same in the two groups, indicating that the DA and 5-HT pallidal hyperinnervations seen in MPTP monkeys result from axon sprouting rather than from the appearance of newly formed axon varicosities on non-growing axons. At the ultrastructural level, pallidal TH+ and SERT+ axons were morphologically similar in MPTP and controls, and their synaptic incidence was very low suggesting a volumic mode of transmission. Altogether, our data reveal a significant sprouting of DA and 5-HT pallidal afferents in parkinsonian monkeys, the functional significance of which remains to be determined. We suggest that the marked DA hyperinnervation of the GPi represents a neuroadaptive change designed to normalize pallidal firing patterns associated with the delayed appearance of motor symptoms, whereas the 5-HT hyperinnervation might be involved in the early expression of non-motor symptoms in Parkinson's disease.
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Affiliation(s)
- Dave Gagnon
- Department of Psychiatry and Neuroscience, Faculty of Medicine, CERVO Brain Research Centre, Université Laval, Quebec City, QC, Canada
| | - Lara Eid
- Department of Psychiatry and Neuroscience, Faculty of Medicine, CERVO Brain Research Centre, Université Laval, Quebec City, QC, Canada
| | - Dymka Coudé
- Department of Psychiatry and Neuroscience, Faculty of Medicine, CERVO Brain Research Centre, Université Laval, Quebec City, QC, Canada
| | - Carl Whissel
- Department of Psychiatry and Neuroscience, Faculty of Medicine, CERVO Brain Research Centre, Université Laval, Quebec City, QC, Canada
| | - Thérèse Di Paolo
- Faculty of Pharmacy, Centre de Recherche du CHU de Québec, Université Laval, Quebec City, QC, Canada
| | - André Parent
- Department of Psychiatry and Neuroscience, Faculty of Medicine, CERVO Brain Research Centre, Université Laval, Quebec City, QC, Canada
| | - Martin Parent
- Department of Psychiatry and Neuroscience, Faculty of Medicine, CERVO Brain Research Centre, Université Laval, Quebec City, QC, Canada
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Tronci E, Francardo V. Animal models of L-DOPA-induced dyskinesia: the 6-OHDA-lesioned rat and mouse. J Neural Transm (Vienna) 2017; 125:1137-1144. [PMID: 29242978 DOI: 10.1007/s00702-017-1825-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 12/05/2017] [Indexed: 12/17/2022]
Abstract
Appearance of L-DOPA-induced dyskinesia (LID) represents a major limitation in the pharmacological therapy with the dopamine precursor L-DOPA. Indeed, the vast majority of parkinsonian patients develop dyskinesia within 9-10 years of L-DOPA oral administration. This makes the discovery of new therapeutic strategies an important need. In the last decades, several animal models of Parkinson's disease (PD) have been developed, to both study mechanisms underlying PD pathology and treatment-induced side effects (i.e., LID) and to screen for new potential anti-parkinsonian and anti-dyskinetic treatments. Among all the models developed, the 6-OHDA-lesioned rodents represent the models of choice to mimic PD motor symptoms and LID, thanks to their reproducibility and translational value. Under L-DOPA treatment, rodents sustaining 6-OHDA lesions develop abnormal involuntary movements with dystonic and hyperkinetic features, resembling what seen in dyskinetic PD patients. These models have been extensively validated by the evidence that dyskinetic behaviors are alleviated by compounds reducing dyskinesia in patients and non-human primate models of PD. This article will focus on the translational value of the 6-OHDA rodent models of LID, highlighting their main features, advantages and disadvantages in preclinical research.
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Affiliation(s)
- Elisabetta Tronci
- Department of Biomedical Sciences, Section of Physiology, University of Cagliari, Cittadella Universitaria, SS554 Km 4.5, 09042, Monserrato, Italy.
| | - Veronica Francardo
- Basal Ganglia Pathophysiology Unit, Department of Experimental Medical Science, Lund University, Lund, Sweden
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13
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Ko WKD, Li Q, Cheng LY, Morelli M, Carta M, Bezard E. A preclinical study on the combined effects of repeated eltoprazine and preladenant treatment for alleviating L-DOPA-induced dyskinesia in Parkinson's disease. Eur J Pharmacol 2017; 813:10-16. [DOI: 10.1016/j.ejphar.2017.07.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 07/15/2017] [Accepted: 07/17/2017] [Indexed: 12/23/2022]
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14
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Huot P, Sgambato-Faure V, Fox SH, McCreary AC. Serotonergic Approaches in Parkinson's Disease: Translational Perspectives, an Update. ACS Chem Neurosci 2017; 8:973-986. [PMID: 28460160 DOI: 10.1021/acschemneuro.6b00440] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Parkinson's disease (PD) has long been seen as a disorder caused by degeneration of the dopaminergic system, leading to the classic motor manifestations of the disease. However, there is now overwhelming evidence that PD is more than a disease merely caused by dopamine depletion. It is well-known that a myriad of other neurotransmitters are affected by the disease process. One such neurotransmitter is serotonin (5-HT). 5-HT has been shown to play a role in several motor and nonmotor manifestations of PD, including tremor, cognition, depression and psychosis. 5-HT also seems to play a critical role in L-3,4-dihydroxyphenylalanine (L-DOPA)-induced dyskinesia. A breadth of preclinical studies and clinical trials have been conducted that aimed at modulating the 5-HT system in order to alleviate depression, cognitive deficits, psychosis, and dyskinesia. In this Review, we summarize recent advances in the 5-HT field in PD, but with a translational emphasis. We start by presenting a novel nonhuman primate model of PD that presents with dual dopamine and 5-HT lesions. We then present preclinical and clinical data that introduce new concepts, such as the use of biased and partial agonists, as well as molecules recently introduced to the field of PD, such as eltoprazine, pimavanserin, nelotanserin, and SYN-120, to enhance therapeutic benefit while minimizing adverse events, notably on parkinsonian disability.
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Affiliation(s)
- Philippe Huot
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montreal, QC H2X 0A9, Canada
- Department
of Pharmacology, Université de Montréal, Montreal, QC H3T 1J4, Canada
- Unité
des Troubles du Mouvement André Barbeau, Centre Hospitalier de l’Université de Montréal, Montreal, QC H2L 4M1, Canada
- Division
of Neurology, Centre Hospitalier de l’Université de Montréal, Montreal, QC, Canada
| | - Véronique Sgambato-Faure
- Institute of Cognitive
Neuroscience Marc Jeannerod, UMR 5229 CNRS, 69 675 Cedex Bron, France
- University Lyon 1, 69100 Villeurbanne, France
| | - Susan H. Fox
- Movement
Disorder Clinic, Toronto Western Hospital, University of Toronto, Toronto, ON M5T2S8, Canada
| | - Andrew C. McCreary
- Janssen Vaccines & Prevention B.V., Archimedesweg 4, 2333 CN Leiden, The Netherlands
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McCreary AC, Varney MA, Newman-Tancredi A. The novel 5-HT 1A receptor agonist, NLX-112 reduces l -DOPA-induced abnormal involuntary movements in rat: A chronic administration study with microdialysis measurements. Neuropharmacology 2016; 105:651-660. [DOI: 10.1016/j.neuropharm.2016.01.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 01/06/2016] [Accepted: 01/07/2016] [Indexed: 01/20/2023]
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Inhibiting Lateral Habenula Improves L-DOPA-Induced Dyskinesia. Biol Psychiatry 2016; 79:345-353. [PMID: 25442003 DOI: 10.1016/j.biopsych.2014.08.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 08/27/2014] [Accepted: 08/29/2014] [Indexed: 11/21/2022]
Abstract
BACKGROUND A systematic search of brain nuclei putatively involved in L-3,4-dihydroxyphenylalanine (L-DOPA)-induced dyskinesia (LID) in Parkinson's disease shed light, notably, upon the lateral habenula (LHb), which displayed an overexpression of the ∆FosB, ARC, and Zif268 immediate-early genes only in rats experiencing abnormal involuntary movements (AIMs). We thus hypothesized that LHb might play a role in LID. METHODS ∆FosB immunoreactivity, 2-deoxyglucose uptake, and firing activity of LHb were studied in experimental models of Parkinson's disease and LID. ΔFosB-expressing LHb neurons were then targeted using the Daun02-inactivation method. A total of 18 monkeys and 55 rats were used. RESULTS LHb was found to be metabolically modified in dyskinetic monkeys and its neuronal firing frequency significantly increased in ON L-DOPA dyskinetic 6-hydroxydopamine-lesioned rats, suggesting that increased LHb neuronal activity in response to L-DOPA is related to AIM manifestation. Therefore, to mechanistically test if LHb neuronal activity might affect AIM severity, following induction of AIMs, 6-hydroxydopamine rats were injected with Daun02 in the LHb previously transfected with ß-galactosidase under control of the FosB promoter. Three days after Daun02 administration, animals were tested daily with L-DOPA to assess LID and L-DOPA-induced rotations. Inactivation of ∆FosB-expressing neurons significantly reduced AIM severity and also increased rotations. Interestingly, the dopaminergic D1 receptor was overexpressed only on the lesioned side of dyskinetic rats in LHb and co-localized with ΔFosB, suggesting a D1 receptor-mediated mechanism supporting the LHb involvement in AIMs. CONCLUSIONS This study highlights the role of LHb in LID, offering a new target to innovative treatments of LID.
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Gagnon D, Gregoire L, Di Paolo T, Parent M. Serotonin hyperinnervation of the striatum with high synaptic incidence in parkinsonian monkeys. Brain Struct Funct 2015; 221:3675-91. [DOI: 10.1007/s00429-015-1125-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 09/29/2015] [Indexed: 12/23/2022]
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18
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Iderberg H, McCreary A, Varney M, Kleven M, Koek W, Bardin L, Depoortère R, Cenci M, Newman-Tancredi A. NLX-112, a novel 5-HT 1A receptor agonist for the treatment of l -DOPA-induced dyskinesia: Behavioral and neurochemical profile in rat. Exp Neurol 2015; 271:335-50. [DOI: 10.1016/j.expneurol.2015.05.021] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 05/22/2015] [Accepted: 05/27/2015] [Indexed: 01/05/2023]
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19
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Bastide MF, Meissner WG, Picconi B, Fasano S, Fernagut PO, Feyder M, Francardo V, Alcacer C, Ding Y, Brambilla R, Fisone G, Jon Stoessl A, Bourdenx M, Engeln M, Navailles S, De Deurwaerdère P, Ko WKD, Simola N, Morelli M, Groc L, Rodriguez MC, Gurevich EV, Quik M, Morari M, Mellone M, Gardoni F, Tronci E, Guehl D, Tison F, Crossman AR, Kang UJ, Steece-Collier K, Fox S, Carta M, Angela Cenci M, Bézard E. Pathophysiology of L-dopa-induced motor and non-motor complications in Parkinson's disease. Prog Neurobiol 2015. [PMID: 26209473 DOI: 10.1016/j.pneurobio.2015.07.002] [Citation(s) in RCA: 347] [Impact Index Per Article: 38.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Involuntary movements, or dyskinesia, represent a debilitating complication of levodopa (L-dopa) therapy for Parkinson's disease (PD). L-dopa-induced dyskinesia (LID) are ultimately experienced by the vast majority of patients. In addition, psychiatric conditions often manifested as compulsive behaviours, are emerging as a serious problem in the management of L-dopa therapy. The present review attempts to provide an overview of our current understanding of dyskinesia and other L-dopa-induced dysfunctions, a field that dramatically evolved in the past twenty years. In view of the extensive literature on LID, there appeared a critical need to re-frame the concepts, to highlight the most suitable models, to review the central nervous system (CNS) circuitry that may be involved, and to propose a pathophysiological framework was timely and necessary. An updated review to clarify our understanding of LID and other L-dopa-related side effects was therefore timely and necessary. This review should help in the development of novel therapeutic strategies aimed at preventing the generation of dyskinetic symptoms.
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Affiliation(s)
- Matthieu F Bastide
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Wassilios G Meissner
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; Department of Neurology, University Hospital Bordeaux, France
| | - Barbara Picconi
- Laboratory of Neurophysiology, Fondazione Santa Lucia, IRCCS, Rome, Italy
| | - Stefania Fasano
- Division of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Pierre-Olivier Fernagut
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Michael Feyder
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Veronica Francardo
- Basal Ganglia Pathophysiology Unit, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Cristina Alcacer
- Basal Ganglia Pathophysiology Unit, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Yunmin Ding
- Department of Neurology, Columbia University, New York, USA
| | - Riccardo Brambilla
- Division of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Gilberto Fisone
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - A Jon Stoessl
- Pacific Parkinson's Research Centre and National Parkinson Foundation Centre of Excellence, University of British Columbia, Vancouver, Canada
| | - Mathieu Bourdenx
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Michel Engeln
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Sylvia Navailles
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Philippe De Deurwaerdère
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Wai Kin D Ko
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Nicola Simola
- Department of Biomedical Sciences, Section of Neuropsychopharmacology, Cagliari University, 09124 Cagliari, Italy
| | - Micaela Morelli
- Department of Biomedical Sciences, Section of Neuropsychopharmacology, Cagliari University, 09124 Cagliari, Italy
| | - Laurent Groc
- Univ. de Bordeaux, Institut Interdisciplinaire de neurosciences, UMR 5297, 33000 Bordeaux, France; CNRS, Institut Interdisciplinaire de neurosciences, UMR 5297, 33000 Bordeaux, France
| | - Maria-Cruz Rodriguez
- Department of Neurology, Hospital Universitario Donostia and Neuroscience Unit, Bio Donostia Research Institute, San Sebastian, Spain
| | - Eugenia V Gurevich
- Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Maryka Quik
- Center for Health Sciences, SRI International, CA 94025, USA
| | - Michele Morari
- Department of Medical Sciences, Section of Pharmacology, University of Ferrara, Ferrara, Italy
| | - Manuela Mellone
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, 20133 Milano, Italy
| | - Fabrizio Gardoni
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, 20133 Milano, Italy
| | - Elisabetta Tronci
- Department of Biomedical Sciences, Physiology Section, Cagliari University, Cagliari, Italy
| | - Dominique Guehl
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - François Tison
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; Department of Neurology, University Hospital Bordeaux, France
| | | | - Un Jung Kang
- Basal Ganglia Pathophysiology Unit, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Kathy Steece-Collier
- Michigan State University, College of Human Medicine, Department of Translational Science and Molecular Medicine & The Udall Center of Excellence in Parkinson's Disease Research, 333 Bostwick Ave NE, Grand Rapids, MI 49503, USA
| | - Susan Fox
- Morton & Gloria Shulman Movement Disorders Center, Toronto Western Hospital, Toronto, Ontario M4T 2S8, Canada
| | - Manolo Carta
- Department of Biomedical Sciences, Physiology Section, Cagliari University, Cagliari, Italy
| | - M Angela Cenci
- Basal Ganglia Pathophysiology Unit, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Erwan Bézard
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; Motac Neuroscience Ltd, Manchester, UK.
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20
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Iderberg H, McCreary A, Varney M, Cenci M, Newman-Tancredi A. Activity of serotonin 5-HT1A receptor ‘biased agonists’ in rat models of Parkinson's disease and l-DOPA-induced dyskinesia. Neuropharmacology 2015; 93:52-67. [DOI: 10.1016/j.neuropharm.2015.01.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 01/08/2015] [Accepted: 01/13/2015] [Indexed: 10/24/2022]
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21
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Fidalgo C, Ko WKD, Tronci E, Li Q, Stancampiano R, Chuan Q, Bezard E, Carta M. Effect of serotonin transporter blockade on L-DOPA-induced dyskinesia in animal models of Parkinson's disease. Neuroscience 2015; 298:389-96. [PMID: 25907446 DOI: 10.1016/j.neuroscience.2015.04.027] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 04/13/2015] [Accepted: 04/13/2015] [Indexed: 12/18/2022]
Abstract
Serotonin transporter blockade with selective serotonin reuptake inhibitors (SSRIs) was recently shown to counteract L-DOPA-induced dyskinesia in 6-hydroxydopamine (6-OHDA)-lesioned rats. However, this effect has never been described in Parkinson's disease (PD) patients, despite that they often receive SSRIs for the treatment of depression. In the present study, we investigated the efficacy of the SSRI citalopram against dyskinesia in two experimental models of PD, the 6-OHDA-lesioned rat and 1-methyl-4-phenyl 1,2,3,6-tetrahydropyridine (MPTP)-treated macaque. First, we studied the acute and chronic effect of citalopram, given at different time points before L-DOPA, in L-DOPA-primed parkinsonian rats. Moreover, the acute effect of citalopram was also evaluated in dyskinetic MPTP-treated macaques. In L-DOPA-primed rats, a significant and long-lasting reduction of L-DOPA-induced dyskinesia (LID) was observed only when citalopram was given 30 min before L-DOPA, suggesting that the time of injection relative to L-DOPA is a key factor for the efficacy of the treatment. Interestingly, an acute challenge with the 5-HT1A/1B receptor agonist eltoprazine, given at the end of the chronic study, was equally effective in reducing LID in rats previously chronically treated with L-DOPA or L-DOPA plus citalopram, suggesting that no auto-receptor desensitization was induced by chronic citalopram treatment. In MPTP-treated macaques, citalopram produced a striking suppression of LID but at the expense of L-DOPA therapeutic efficacy, which represents a concern for possible clinical application.
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Affiliation(s)
- C Fidalgo
- Department of Biomedical Sciences, Section of Physiology, University of Cagliari, University Campus, SS554 km 4.5, 09042 Monserrato, Italy
| | - W K D Ko
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; Motac Neuroscience, Manchester, UK
| | - E Tronci
- Department of Biomedical Sciences, Section of Physiology, University of Cagliari, University Campus, SS554 km 4.5, 09042 Monserrato, Italy
| | - Q Li
- Motac Neuroscience, Manchester, UK; Institute of Lab Animal Sciences, China Academy of Medical Sciences, Beijing, China
| | - R Stancampiano
- Department of Biomedical Sciences, Section of Physiology, University of Cagliari, University Campus, SS554 km 4.5, 09042 Monserrato, Italy
| | - Q Chuan
- Institute of Lab Animal Sciences, China Academy of Medical Sciences, Beijing, China
| | - E Bezard
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; Motac Neuroscience, Manchester, UK; Institute of Lab Animal Sciences, China Academy of Medical Sciences, Beijing, China
| | - M Carta
- Department of Biomedical Sciences, Section of Physiology, University of Cagliari, University Campus, SS554 km 4.5, 09042 Monserrato, Italy.
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22
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Huot P, Fox SH, Brotchie JM. Monoamine reuptake inhibitors in Parkinson's disease. PARKINSON'S DISEASE 2015; 2015:609428. [PMID: 25810948 PMCID: PMC4355567 DOI: 10.1155/2015/609428] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 12/26/2014] [Indexed: 12/13/2022]
Abstract
The motor manifestations of Parkinson's disease (PD) are secondary to a dopamine deficiency in the striatum. However, the degenerative process in PD is not limited to the dopaminergic system and also affects serotonergic and noradrenergic neurons. Because they can increase monoamine levels throughout the brain, monoamine reuptake inhibitors (MAUIs) represent potential therapeutic agents in PD. However, they are seldom used in clinical practice other than as antidepressants and wake-promoting agents. This review article summarises all of the available literature on use of 50 MAUIs in PD. The compounds are divided according to their relative potency for each of the monoamine transporters. Despite wide discrepancy in the methodology of the studies reviewed, the following conclusions can be drawn: (1) selective serotonin transporter (SERT), selective noradrenaline transporter (NET), and dual SERT/NET inhibitors are effective against PD depression; (2) selective dopamine transporter (DAT) and dual DAT/NET inhibitors exert an anti-Parkinsonian effect when administered as monotherapy but do not enhance the anti-Parkinsonian actions of L-3,4-dihydroxyphenylalanine (L-DOPA); (3) dual DAT/SERT inhibitors might enhance the anti-Parkinsonian actions of L-DOPA without worsening dyskinesia; (4) triple DAT/NET/SERT inhibitors might exert an anti-Parkinsonian action as monotherapy and might enhance the anti-Parkinsonian effects of L-DOPA, though at the expense of worsening dyskinesia.
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Affiliation(s)
- Philippe Huot
- Toronto Western Research Institute, Toronto Western Hospital, University Health Network, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
- Division of Neurology, Movement Disorder Clinic, Toronto Western Hospital, University Health Network, University of Toronto, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
- Department of Pharmacology and Division of Neurology, Faculty of Medicine, Université de Montréal and Centre Hospitalier de l'Université de Montréal, Montréal, QC, Canada
| | - Susan H. Fox
- Toronto Western Research Institute, Toronto Western Hospital, University Health Network, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
- Division of Neurology, Movement Disorder Clinic, Toronto Western Hospital, University Health Network, University of Toronto, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
| | - Jonathan M. Brotchie
- Toronto Western Research Institute, Toronto Western Hospital, University Health Network, 399 Bathurst Street, Toronto, ON, Canada M5T 2S8
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23
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Abstract
Progressive loss of nigrostriatal dopamine (DA) neurons is the neuropathological hallmark of Parkinson's disease (PD). Symptoms of the disease can often be treated by DA D2 agonists and thus seem related to disinhibition of the indirect striatal pathway. However, there is no evidence that symptoms arise by low extracellular DA concentration or are associated with reduced D2 receptor binding. Here I provide a theoretical analysis of the pathophysiology and postsynaptic adaptation resulting from striatal DA denervation. I found that progressive denervation may alter DA signaling by three independent mechanisms depending on degree of denervation and macroscopic morphology of the lesion. As long as the remaining innervation stays anatomically coherent, denervation reduces phasic variations in extracellular DA, but the DA tone is not changed. The reduction of phasic signaling can be partially compensated by upregulating postsynaptic signaling cascades. However, changes in DA dynamics evade compensation. With 80-99% denervation, a persistent aberrant signal develops in D2-regulated pathways caused by random fluctuations in tonic DA release. Permanent low DA levels occur in regions completely void of innervation. Simulation of l-dopa therapy reduced the aberrant D2 signal. With a high degree of denervation, l-dopa enhanced another aberrant signal, this time in the D1 pathway. This analysis provides a quantitative, physiologically consistent view of the early and late stages of PD, the effect of main therapeutic medications, and potential side effects. The mechanisms described here may also provide an explanation to currently inexplicable pathological phenomena such as psycho stimulant-induced contraversive rotations in animal models.
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Functional correlates of exaggerated oscillatory activity in basal ganglia output in hemiparkinsonian rats. Exp Neurol 2014; 261:563-77. [PMID: 25084518 DOI: 10.1016/j.expneurol.2014.07.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 07/08/2014] [Accepted: 07/20/2014] [Indexed: 11/23/2022]
Abstract
Exaggerated beta range (13-30Hz) synchronized activity is observed in the basal ganglia of Parkinson's disease (PD) patients during implantation of deep brain stimulation electrodes and is thought to contribute to the motor symptoms of this disorder. To explore the translational potential of similar activity observed in a rat model of PD, local field potentials (LFPs) and spiking activity in basal ganglia output were characterized in rats with unilateral dopamine cell lesion during a range of behaviors. A circular treadmill was used to assess activity during walking; hemiparkinsonian rats could maintain a steady gait when oriented ipsiversive to the lesioned hemisphere, but were less effective at walking when oriented contraversive to lesion. Dramatic increases in substantia nigra pars reticulata (SNpr) LFP oscillatory activity and spike-LFP synchronization were observed within the beta/low gamma range (12-40Hz) in the lesioned hemisphere, relative to the non-lesioned hemisphere, with the dominant frequency of spike-LFP entrainment and LFP power varying with behavioral state. At 3weeks postlesion, the mean dominant entrainment frequency during ipsiversive treadmill walking and grooming was 34Hz. Other behaviors were associated with lower mean entrainment frequencies: 27-28Hz during alert non-walking and REM, 17Hz during rest and 21Hz during urethane anesthesia with sensory stimulation. SNpr spike-LFP entrainment frequency was stable during individual treadmill walking epochs, but increased gradually over weeks postlesion. In contrast, SNpr LFP power in the 25-40Hz range was greatest at the initiation of each walking epoch, and decreased during walking to stabilize by 6min at 49% of initial values. Power was further modulated in conjunction with the 1.5s stepping rhythm. Administration of l-dopa improved contraversive treadmill walking in correlation with a reduction in SNpr 25-40Hz LFP power and spike synchronization in the dopamine cell lesioned hemisphere. These effects were reversed by the serotonergic 1A agonist, 8-OH-DPAT. While the prominent spike-LFP phase locking observed during ongoing motor activity in the hemiparkinsonian rats occurs at frequencies intriguingly higher than in PD patients, the synchronized activity in the SNpr of this animal model has much in common with oscillatory activity recorded from the basal ganglia of the PD patients. Results support the potential of this model for providing insight into relationships between synchronization of basal ganglia output induced by loss of dopamine and motor symptoms in PD.
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Mahmoudi J, Farhoudi M, Reyhani-Rad S, Sadigh-Eteghad S. Dampening of Serotonergic System through 5HT1A Receptors is a Promising Target for Treatment of Levodopa Induced Motor Problems. Adv Pharm Bull 2013; 3:439-41. [PMID: 24312874 DOI: 10.5681/apb.2013.071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 02/25/2013] [Accepted: 02/26/2013] [Indexed: 11/17/2022] Open
Abstract
During long-term treatment with Levodopa, majority of patients with Parkinson's disease experience some abnormal motor problems including of Levodopa induced dyskinesia (LID) and wearing off. Incredible evidences suggest that serotonergic neurons compensate some functions of lost dopaminergic neurons in Parkinson's disease especially in advanced disease stages. Therefore, it has been postulated that serotonergic neurons are the major source for development of these unwanted effects. 5HT1A receptors are located on the serotonergic neurons and are involved in regulation of normal motor functions. With respect to the role of serotonergic projection in Parkinson's disease and importance of 5HT1A receptors in motor activity it seems that inactivation of these neurons by stimulation of 5HT1A receptors could provide benefits in treatment of Levodopa induced motor impairments.
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Affiliation(s)
- Javad Mahmoudi
- Neurosciences Research Center (NSRC), Tabriz University of Medical Sciences, Tabriz, Iran
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Bastide MF, Dovero S, Charron G, Porras G, Gross CE, Fernagut PO, Bézard E. Immediate-early gene expression in structures outside the basal ganglia is associated to l-DOPA-induced dyskinesia. Neurobiol Dis 2013; 62:179-92. [PMID: 24103779 DOI: 10.1016/j.nbd.2013.09.020] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 09/27/2013] [Indexed: 01/20/2023] Open
Abstract
Long-term l-3,4-dihydroxyphenylalanine (l-DOPA) treatment in Parkinson's disease (PD) leads to l-DOPA-induced dyskinesia (LID), a condition thought to primarily involve the dopamine D1 receptor-expressing striatal medium spiny neurons. Activation of the D1 receptor results in increased expression of several molecular markers, in particular the members of the immediate-early gene (IEG) family, a class of genes rapidly transcribed in response to an external stimulus. However, several dopaminoceptive structures in the brain that are likely to be affected by the exogenously produced DA have received little attention although they might play a key role in mediating those l-DOPA-induced abnormal behaviours. ΔFosB, ARC, FRA2 and Zif268 IEGs expression patterns were thus characterised, using unbiased stereological methods, in the whole brain of dyskinetic and non-dyskinetic rats to identify brain nuclei displaying a transcriptional response specifically related to LID. Within the basal ganglia, the striatum and the substantia nigra pars reticulata showed an increased expression of all four IEGs in dyskinetic compared to non-dyskinetic rats. Outside the basal ganglia, there was a striking increased expression of the four IEGs in the motor cortex, the bed nucleus of the stria terminalis, the dorsal hippocampus, the pontine nuclei, the cuneiform nucleus and the pedunculopontine nuclei. Moreover, the zona incerta and the lateral habenula displayed an overexpression of ΔFosB, ARC and Zif268. Among these structures, the IEG expression in the striatum, the bed nucleus of the stria terminalis, the lateral habenula, the pontine nuclei and the cuneiform nucleus correlate with LID severity. These results illustrate a global transcriptional response to a dyskinetic state in the whole brain suggesting the possible involvement of these structures in LID.
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Affiliation(s)
- Matthieu F Bastide
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Sandra Dovero
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Giselle Charron
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Gregory Porras
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Christian E Gross
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Pierre-Olivier Fernagut
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France
| | - Erwan Bézard
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, 33000 Bordeaux, France.
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Dominguez-Meijide A, Villar-Cheda B, Garrido-Gil P, Sierrra-Paredes G, Guerra MJ, Labandeira-Garcia JL. Effect of chronic treatment with angiotensin type 1 receptor antagonists on striatal dopamine levels in normal rats and in a rat model of Parkinson's disease treated with L-DOPA. Neuropharmacology 2013; 76 Pt A:156-68. [PMID: 23973568 DOI: 10.1016/j.neuropharm.2013.07.016] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 06/20/2013] [Accepted: 07/17/2013] [Indexed: 01/08/2023]
Abstract
Beneficial effects of angiotensin type-1 receptor (AT1) inhibition have been observed in a number of brain processes mediated by oxidative stress and neuroinflammation, including Parkinson's disease. However, important counterregulatory interactions between dopamine and angiotensin systems have recently been demonstrated in several peripheral tissues, and it is possible that a decrease in dopamine levels due to AT1 inhibition may interfere with neuroprotective strategies. The present experiments involving rats with normal dopaminergic innervation indicate that chronic treatment with the AT1 antagonist candesartan does not significantly affect striatal levels of dopamine, serotonin or metabolites, as does not significantly affect motor behavior, as evaluated by the rotarod test. Interestingly, chronic administration of candesartan to normal rats induced a marked increase in dopamine D1 and a decrease in dopamine D2 receptor expression. In a rat model of Parkinson's disease treated with L-DOPA, no differences in striatal dopamine and serotonin levels were observed between candesartan-treated rats and untreated, which suggests that chronic treatment with candesartan does not significantly affect the process of L-DOPA decarboxylation and dopamine release in Parkinson's disease patients. Candesartan did not induce any differences in the striatal expression of dopamine D1 and D2 and serotonin 5-HT1B receptors in 6ydroxydopamine-lesioned rats treated with L-DOPA. The results suggest that chronic treatment with AT1 antagonists as a neuroprotective strategy does not significantly affect striatal dopamine release or motor behavior. This article is part of the Special Issue entitled 'The Synaptic Basis of Neurodegenerative Disorders'.
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Affiliation(s)
- Antonio Dominguez-Meijide
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, Faculty of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain; Networking Research Center on Neurodegenerative Diseases (CIBERNED), Spain
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Quik M, Campos C, Bordia T, Strachan JP, Zhang J, McIntosh JM, Letchworth S, Jordan K. α4β2 Nicotinic receptors play a role in the nAChR-mediated decline in L-dopa-induced dyskinesias in parkinsonian rats. Neuropharmacology 2013; 71:191-203. [PMID: 23583932 DOI: 10.1016/j.neuropharm.2013.03.038] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 03/25/2013] [Accepted: 03/28/2013] [Indexed: 12/26/2022]
Abstract
L-Dopa-induced dyskinesias are a serious long-term side effect of dopamine replacement therapy for Parkinson's disease for which there are few treatment options. Our previous studies showed that nicotine decreased l-dopa-induced abnormal involuntary movements (AIMs). Subsequent work with knockout mice demonstrated that α6β2* nicotinic receptors (nAChRs) play a key role. The present experiments were done to determine if α4β2* nAChRs are also involved in l-dopa-induced dyskinesias. To approach this, we took advantage of the finding that α6β2* nAChRs are predominantly present on striatal dopaminergic nerve terminals, while a significant population of α4β2* nAChRs are located on other neurons. Thus, a severe dopaminergic lesion would cause a major loss in α6β2*, but not α4β2* nAChRs. Experiments were therefore done in which rats were unilaterally lesioned with 6-hydroxydopamine, at a dose that led to severe nigrostriatal damage. The dopamine transporter, a dopamine nerve terminal marker, was decreased by >99%. This lesion also decreased striatal α6β2* nAChRs by 97%, while α4β2* nAChRs were reduced by only 12% compared to control. A series of β2* nAChR compounds, including TC-2696, TI-10165, TC-8831, TC-10600 and sazetidine reduced l-dopa-induced AIMs in these rats by 23-32%. TC-2696, TI-10165, TC-8831 were also tested for parkinsonism, with no effect on this behavior. Tolerance did not develop with up to 3 months of treatment. Since α4α5β2 nAChRs are also predominantly on striatal dopamine terminals, these data suggest that drugs targeting α4β2 nAChRs may reduce l-dopa-induced dyskinesias in late stage Parkinson's disease.
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Affiliation(s)
- Maryka Quik
- Center for Health Sciences, SRI International, 333 Ravenswood Ave., Menlo Park, CA 94025, USA.
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Huot P, Johnston TH, Koprich JB, Fox SH, Brotchie JM. The Pharmacology of l-DOPA-Induced Dyskinesia in Parkinson’s Disease. Pharmacol Rev 2013; 65:171-222. [DOI: 10.1124/pr.111.005678] [Citation(s) in RCA: 233] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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Lanciego JL, Luquin N, Obeso JA. Functional neuroanatomy of the basal ganglia. Cold Spring Harb Perspect Med 2012; 2:a009621. [PMID: 23071379 DOI: 10.1101/cshperspect.a009621] [Citation(s) in RCA: 421] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The "basal ganglia" refers to a group of subcortical nuclei responsible primarily for motor control, as well as other roles such as motor learning, executive functions and behaviors, and emotions. Proposed more than two decades ago, the classical basal ganglia model shows how information flows through the basal ganglia back to the cortex through two pathways with opposing effects for the proper execution of movement. Although much of the model has remained, the model has been modified and amplified with the emergence of new data. Furthermore, parallel circuits subserve the other functions of the basal ganglia engaging associative and limbic territories. Disruption of the basal ganglia network forms the basis for several movement disorders. This article provides a comprehensive account of basal ganglia functional anatomy and chemistry and the major pathophysiological changes underlying disorders of movement. We try to answer three key questions related to the basal ganglia, as follows: What are the basal ganglia? What are they made of? How do they work? Some insight on the canonical basal ganglia model is provided, together with a selection of paradoxes and some views over the horizon in the field.
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Affiliation(s)
- José L Lanciego
- Department of Neuroscience, Center for Applied Medical Research (CIMA & CIBERNED), University of Navarra Medical College, Pamplona, Spain
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Lettfuss NY, Fischer K, Sossi V, Pichler BJ, von Ameln-Mayerhofer A. Imaging DA release in a rat model of L-DOPA-induced dyskinesias: A longitudinal in vivo PET investigation of the antidyskinetic effect of MDMA. Neuroimage 2012; 63:423-33. [DOI: 10.1016/j.neuroimage.2012.06.051] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 06/03/2012] [Accepted: 06/26/2012] [Indexed: 01/04/2023] Open
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The monoamine re-uptake inhibitor UWA-101 improves motor fluctuations in the MPTP-lesioned common marmoset. PLoS One 2012; 7:e45587. [PMID: 23029119 PMCID: PMC3447761 DOI: 10.1371/journal.pone.0045587] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Accepted: 08/23/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The wearing-OFF phenomenon is a common motor complication of chronic L-3,4-dihydroxyphenylalanine (L-DOPA) therapy for Parkinson's disease. We recently described the discovery of UWA-101, a dual serotonin (SERT) and dopamine (DAT) transporter inhibitor, which increases the duration of "good quality" ON-time provided by L-DOPA in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned primate. Here, we further characterise the effects of UWA-101 on this extension of ON-time in terms of L-DOPA-induced side-effects in the MPTP-lesioned common marmoset. METHODS Marmosets were rendered parkinsonian by MPTP injection and "primed" by repeated L-DOPA administration, to exhibit dyskinesia and psychosis-like behaviours. Animals were then administered acute challenges of L-DOPA in combination with UWA-101 (1, 3, 6 and 10 mg/kg) or vehicle. RESULTS In combination with L-DOPA, UWA-101 (3, 6 and 10 mg/kg) significantly increased duration of ON-time (by 28%, 28%, and 33%, respectively; all P<0.05). UWA-101 (10 mg/kg) significantly extended duration of ON-time without disabling dyskinesia (by 62%, P<0.01). UWA-101 did not exacerbate the severity of dyskinesia (P>0.05). However, at the highest doses (6 and 10 mg/kg), UWA-101 increased the severity of psychosis-like behaviours (P<0.05). CONCLUSIONS Our results demonstrate that dual SERT/ DAT inhibitors can effectively enhance L-DOPA anti-parkinsonian action, without exacerbating dyskinesia and, as such, represent a promising new therapeutic class for wearing-OFF. However, at higher doses, dual SERT/ DAT inhibitors may exacerbate dopaminergic psychosis.
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Quik M, Wonnacott S. α6β2* and α4β2* nicotinic acetylcholine receptors as drug targets for Parkinson's disease. Pharmacol Rev 2012; 63:938-66. [PMID: 21969327 DOI: 10.1124/pr.110.003269] [Citation(s) in RCA: 147] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Parkinson's disease is a debilitating movement disorder characterized by a generalized dysfunction of the nervous system, with a particularly prominent decline in the nigrostriatal dopaminergic pathway. Although there is currently no cure, drugs targeting the dopaminergic system provide major symptomatic relief. As well, agents directed to other neurotransmitter systems are of therapeutic benefit. Such drugs may act by directly improving functional deficits in these other systems, or they may restore aberrant motor activity that arises as a result of a dopaminergic imbalance. Recent research attention has focused on a role for drugs targeting the nicotinic cholinergic systems. The rationale for such work stems from basic research findings that there is an extensive overlap in the organization and function of the nicotinic cholinergic and dopaminergic systems in the basal ganglia. In addition, nicotinic acetylcholine receptor (nAChR) drugs could have clinical potential for Parkinson's disease. Evidence for this proposition stems from studies with experimental animal models showing that nicotine protects against neurotoxin-induced nigrostriatal damage and improves motor complications associated with l-DOPA, the "gold standard" for Parkinson's disease treatment. Nicotine interacts with multiple central nervous system receptors to generate therapeutic responses but also produces side effects. It is important therefore to identify the nAChR subtypes most beneficial for treating Parkinson's disease. Here we review nAChRs with particular emphasis on the subtypes that contribute to basal ganglia function. Accumulating evidence suggests that drugs targeting α6β2* and α4β2* nAChR may prove useful in the management of Parkinson's disease.
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Affiliation(s)
- Maryka Quik
- Center for Health Sciences, SRI International, Menlo Park, CA 94025, USA.
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Mahmoudi J, Mohajjel Nayebi A, Reyhani-Rad S, Samini M. Fluoxetine improves the effect of levodopa on 6-hydroxy dopamine-induced motor impairments in rats. Adv Pharm Bull 2012; 2:149-55. [PMID: 24312786 PMCID: PMC3846000 DOI: 10.5681/apb.2012.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Accepted: 06/10/2012] [Indexed: 11/17/2022] Open
Abstract
PURPOSE Long term L-DOPA therapy in Parkinson's disease is associated with troublesome motor fluctuations such as L -DOPA Induced dyskinesia and wearing off effect. Our recent study showed that activation of 5-HT1A receptors could improve the anti-cataleptic effect of L-DOPA in parkinsonian rats. In this study we investigated the effect of fluoxetine on anti-parkinsonian effect of L-DOPA in 6-hydroxydopamine (6-OHDA)-lesioned rats. METHODS Catalepsy and motor incoordination were induced by unilateral injection of 6-OHDA (8μg/2μl/rat) into the central region of the sabstantia nigra pars compacta (SNc). After 3 weeks as a recovery period, these rats injected intraperitoneally (i.p.) L-DOPA (15 mg/kg) twice daily for 20 consecutive days, and anti-parkinsonian effect of L-DOPA was investigated by bar-test and rotarod on days 5, 10, 15 and 20. RESULTS The results showed that L-DOPA is able to improve motor coordination in rotarod only until day 15 and these effects of L-DOPA were abolished on the day 20. On day 21, rats were co-injected with fluoxetine (0.1, 0.5 and 1mg/kg, i.p.) and L-DOPA (15 mg/kg, i.p.). Fluoxetine increased anti-cataleptic effect of L-DOPA at the dose of 1 mg/kg, while fluoxetine had not any impact on the effect of L-DOPA in rotarod test. The effect of fluoxetine (1 mg/kg, i.p.) on anti-cataleptic effect of L-DOPA (15 mg/kg, i.p.) was reversed by 1-(2-methoxyphenyl)-4-(4-phthalimidobutyl) piperazine hydrobromide (NAN-190; 0.5 mg/kg, i.p.), as a 5-HT1A receptor antagonist. CONCLUSION According to the results, it may be concluded that fluoxetine improves 6-OHDA-induced catalepsy and motor imbalance in L-DOPA- treated rats through activation of 5-HT1A. Further studies should be designed to clarify the precise mechanism of interaction between 5-HT1A and dopaminergic neurons.
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Affiliation(s)
- Javad Mahmoudi
- Department of Pharmacology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Alireza Mohajjel Nayebi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tabriz University of Medical Science, Tabriz 51664, Iran
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz 51664, Iran
| | - Siyamak Reyhani-Rad
- Department of laboratory sciences, Marand Branch, Islamic Azad University, Marand, Iran
| | - Morteza Samini
- Department of Pharmacology, Science and Research Branch, Islamic Azad University, Tehran, Iran
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Understanding and prevention of "therapy-" induced dyskinesias. PARKINSONS DISEASE 2012; 2012:640815. [PMID: 22685687 PMCID: PMC3366244 DOI: 10.1155/2012/640815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 03/09/2012] [Accepted: 03/26/2012] [Indexed: 11/18/2022]
Abstract
L-dopa is the most effective, currently available treatment for Parkinson's disease (PD), but it leads to the development of involuntary movements known as L-dopa-induced dyskinesia (LID) in the majority of patients after long-term use. Both gene and cell therapy approaches are the subject of multiple ongoing studies as potential ways of relieving symptoms of PD without the complication of dyskinesia. However, the spectre of dyskinesia in the absence of L-dopa, the so-called "off-phase" or graft-induced dyskinesia (GID), remains a major obstacle particularly in the further development of cell therapy in PD, but it is also a concern for proponents of gene therapy approaches. LID results from nonphysiological dopamine release, supersensitivity of dopamine receptors, and consequent abnormal signalling through mechanisms of synaptic plasticity. Restoration of physiological circuitry within the basal ganglia loops is ultimately the aim of all cell and gene therapy approaches but each using distinctive strategies and accompanied by risks of exacerbation of LID or development of "off-phase"/GID. In this paper we discuss the details of what is understood regarding the development of dyskinesias with relevance to cell and gene therapy and potential strategies to minimize their occurrence.
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Mahmoudi J, Nayebi AM, Samini M, Reyhani-Rad S, Babapour V. Buspirone improves the anti-cataleptic effect of levodopa in 6-hydroxydopamine-lesioned rats. Pharmacol Rep 2012; 63:908-14. [PMID: 22001978 DOI: 10.1016/s1734-1140(11)70606-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 02/11/2011] [Indexed: 10/25/2022]
Abstract
In Parkinson's disease (PD), prolonged exposure to L-3,4-dihydroxyphenylalanine (L-DOPA) results in motor fluctuations, such as the on-off phenomenon, and L-DOPA-induced dyskinesia. Previously, we found that activation of 5-HT(1A) in the substantia nigra pars compacta (SNc) decreased catalepsy in parkinsonian rats. In the current investigation, we attempted to evaluate the effect of buspirone on the anti-cataleptic effect of L-DOPA in 6-hydroxydopamine (6-OHDA)-lesioned male Wistar rats. Catalepsy was induced by the unilateral infusion of 6-OHDA (8 μg/2 μl/rat) into the central region of the SNc. After a 3-week recovery period, rats received L-DOPA intraperitoneally (ip; 15 mg/kg) twice daily for 20 days, and the anti-cataleptic effect of L-DOPA was assessed by the bar test at days 5, 10, 15 and 20. The results showed that L-DOPA had an anti-cataleptic effect only until day 15, and its effect was abolished on day 20. On day 21, these rats were co-treated with three different doses of buspirone (0.1, 0.5 and 2.5 mg/kg, ip) and L-DOPA (15 mg/kg, ip). At a dose of 0.5 mg/kg, buspirone improved the anti-cataleptic effect of L-DOPA. Furthermore, the effect of buspirone (0.5 mg/kg, ip) on the anti-cataleptic effect of L-DOPA (15 mg/kg, ip) was reversed by 1-(2-methoxyphenyl)-4-(4-phthalimidobutyl)piperazine hydrobromide (NAN-190; 0.5 mg/kg, ip), a 5-HT(1A) receptor antagonist. From these results, it may be concluded that buspirone improves the anti-cataleptic effect of L-DOPA in a 6-OHDA-induced animal model of PD through the activation of 5-HT(1A) receptors. In this regard, further investigations should be undertaken to clarify the exact mechanism of the interaction between 5-HT(1A) and dopaminergic neurons.
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Affiliation(s)
- Javad Mahmoudi
- Department of Pharmacology, Science and Research Branch, Islamic Azad University, Tehran, Iran
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Huot P, Johnston TH, Koprich JB, Winkelmolen L, Fox SH, Brotchie JM. Regulation of cortical and striatal 5-HT1A receptors in the MPTP-lesioned macaque. Neurobiol Aging 2012; 33:207.e9-19. [DOI: 10.1016/j.neurobiolaging.2010.09.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2010] [Revised: 08/31/2010] [Accepted: 09/14/2010] [Indexed: 11/15/2022]
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Lane EL, Winkler C. l-DOPA- and graft-induced dyskinesia following transplantation. PROGRESS IN BRAIN RESEARCH 2012. [DOI: 10.1016/b978-0-444-59575-1.00007-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Chronic 5-HT transporter blockade reduces DA signaling to elicit basal ganglia dysfunction. J Neurosci 2011; 31:15742-50. [PMID: 22049417 DOI: 10.1523/jneurosci.2989-11.2011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Serotonin (5-HT)-selective reuptake inhibitors (SSRIs) are widely administered for the treatment of depression, anxiety, and other neuropsychiatric disorders, but response rates are low, and side effects often lead to discontinuation. Side effect profiles suggest that SSRIs inhibit dopaminergic activity, but mechanistic insight remains scarce. Here we show that in mice, chronic 5-HT transporter (5-HTT) blockade during adulthood but not during development impairs basal ganglia-dependent behaviors in a dose-dependent and reversible fashion. Furthermore, chronic 5-HTT blockade reduces striatal dopamine (DA) content and metabolism. A causal relationship between reduced DA signaling and impaired basal ganglia-dependent behavior is indicated by the reversal of behavioral deficits through L-DOPA administration. Our data suggest that augmentation of DA signaling would reduce side effects and increase efficacies of SSRI-based therapy.
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Martinez A, Macheda T, Morgese MG, Trabace L, Giuffrida A. The cannabinoid agonist WIN55212-2 decreases L-DOPA-induced PKA activation and dyskinetic behavior in 6-OHDA-treated rats. Neurosci Res 2011; 72:236-42. [PMID: 22192465 DOI: 10.1016/j.neures.2011.12.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 11/16/2011] [Accepted: 12/08/2011] [Indexed: 12/11/2022]
Abstract
Chronic Levodopa (L-DOPA), the gold standard therapy for Parkinson's disease (PD), causes disabling motor complications (dyskinesias) that are associated with changes in the activity of striatal protein kinase A (PKA) and cAMP-regulated phosphoprotein of 32 kDa (DARPP-32). In this study, we showed that systemic administration of the cannabinoid agonist WIN55212-2 ameliorated L-DOPA-induced abnormal involuntary movements (AIMs) in the 6-OHDA rat model of PD and reversed L-DOPA-induced PKA hyperactivity via a CB(1)-mediated mechanism. This effect was accompanied by increased phosphorylation of DARPP-32 at threonine 34, which was partially blocked by CB(1) antagonism. Striatal PKA activity was positively correlated with the severity of L-DOPA-induced axial and limb dyskinesias, suggesting a role for the cAMP/PKA signaling pathway in the expression of these motor disturbances. Our results indicate that activation of CB(1) receptors, as well as reduction of striatal PKA hyperactivity, might be an effective strategy for the treatment of L-DOPA-induced dyskinesias.
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Affiliation(s)
- Alex Martinez
- Department of Pharmacology, University of Texas Health Science Center, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA
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Huot P, Fox SH, Brotchie JM. The serotonergic system in Parkinson's disease. Prog Neurobiol 2011; 95:163-212. [PMID: 21878363 DOI: 10.1016/j.pneurobio.2011.08.004] [Citation(s) in RCA: 135] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 08/05/2011] [Accepted: 08/15/2011] [Indexed: 01/23/2023]
Abstract
Although the cardinal manifestations of Parkinson's disease (PD) are attributed to a decline in dopamine levels in the striatum, a breadth of non-motor features and treatment-related complications in which the serotonergic system plays a pivotal role are increasingly recognised. Serotonin (5-HT)-mediated neurotransmission is altered in PD and the roles of the different 5-HT receptor subtypes in disease manifestations have been investigated. The aims of this article are to summarise and discuss all published preclinical and clinical studies that have investigated the serotonergic system in PD and related animal models, in order to recapitulate the state of the current knowledge and to identify areas that need further research and understanding.
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Affiliation(s)
- Philippe Huot
- Toronto Western Research Institute, MCL 11-419, Toronto Western Hospital, University Health Network, 399 Bathurst Street, Toronto, Ontario, Canada M5T 2S8
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5-HT(1A) receptor stimulation and L-DOPA-induced dyskinesia in Parkinson's disease: bridging the gap between serotonergic and glutamatergic mechanisms. Exp Neurol 2011; 231:195-8. [PMID: 21819982 DOI: 10.1016/j.expneurol.2011.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 06/27/2011] [Accepted: 07/16/2011] [Indexed: 11/21/2022]
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Role of α6 nicotinic receptors in CNS dopaminergic function: relevance to addiction and neurological disorders. Biochem Pharmacol 2011; 82:873-82. [PMID: 21684266 DOI: 10.1016/j.bcp.2011.06.001] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 06/01/2011] [Accepted: 06/02/2011] [Indexed: 11/23/2022]
Abstract
Although a relative newcomer to the nicotinic acetylcholine receptor (nAChR) family, substantial evidence suggests that α6 containing nAChRs play a key role in CNS function. This subtype is unique in its relatively restricted localization to the visual system and catecholaminergic pathways. These latter include the mesolimbic and nigrostriatal dopaminergic systems, which may account for the involvement of α6 containing nAChRs in the rewarding properties of nicotine and in movement. Here, we review the literature on the role of α6 containing nAChRs with a focus on the striatum and nucleus accumbens. This includes molecular, electrophysiological and behavioral studies in control and lesioned animal models, as well as in different genetic models. Converging evidence suggest that the major α6 containing nAChRs subtypes in the nigrostriatal and mesolimbic dopamine system are the α6β2β3 and α6α4β2β3 nAChR populations. They appear to have a dominant role in regulating dopamine release, with consequent effects on nAChR-modulated dopaminergic functions such as reinforcement and motor behavior. Altogether these data suggest that drugs directed to α6 containing nAChRs may be of benefit for the treatment of addiction and for neurological disorders with locomotor deficits such as Parkinson's disease.
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Wakeman DR, Dodiya HB, Kordower JH. Cell transplantation and gene therapy in Parkinson's disease. ACTA ACUST UNITED AC 2011; 78:126-58. [PMID: 21259269 DOI: 10.1002/msj.20233] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Parkinson's disease is a progressive neurodegenerative disorder affecting, in part, dopaminergic motor neurons of the ventral midbrain and their terminal projections that course to the striatum. Symptomatic strategies focused on dopamine replacement have proven effective at remediating some motor symptoms during the course of disease but ultimately fail to deliver long-term disease modification and lose effectiveness due to the emergence of side effects. Several strategies have been experimentally tested as alternatives for Parkinson's disease, including direct cell replacement and gene transfer through viral vectors. Cellular transplantation of dopamine-secreting cells was hypothesized as a substitute for pharmacotherapy to directly provide dopamine, whereas gene therapy has primarily focused on restoration of dopamine synthesis or neuroprotection and restoration of spared host dopaminergic circuitry through trophic factors as a means to enhance sustained controlled dopamine transmission. This seems now to have been verified in numerous studies in rodents and nonhuman primates, which have shown that grafts of fetal dopamine neurons or gene transfer through viral vector delivery can lead to improvements in biochemical and behavioral indices of dopamine deficiency. However, in clinical studies, the improvements in parkinsonism have been rather modest and variable and have been plagued by graft-induced dyskinesias. New developments in stem-cell transplantation and induced patient-derived cells have opened the doors for the advancement of cell-based therapeutics. In addition, viral-vector-derived therapies have been developed preclinically with excellent safety and efficacy profiles, showing promise in clinical trials thus far. Further progress and optimization of these therapies will be necessary to ensure safety and efficacy before widespread clinical use is deemed appropriate.
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Abstract
PURPOSE OF REVIEW We review recent experiments conducted using embryonic tissue and stem cell transplants in experimental models of Parkinson's disease. We also highlight the challenges which remain to be met in order for cell therapy to become clinically effective and safe. RECENT FINDINGS The outcome of previous clinical transplantation trials was variable in terms of motor recovery. We discuss whether transplants can mitigate L-3,4-dihydroxyphenylalanine (L-DOPA)-induced dyskinesias and consider the risk factors which predispose to graft-induced dyskinesias. In addition, we introduce Transeuro, a new European Union-funded multicenter consortium which plans to perform transplantation trials.Stem cells have emerged as an alternative source for the generation of dopaminergic precursors. We briefly outline progress made in the use of human embryonic stem cells and focus predominantly on the emerging field of induced pluripotency. We conclude by introducing the exciting and novel method of direct reprogramming which involves the conversion of fibroblasts to neurons without inducing a pluripotent state. SUMMARY The area of cell transplantation has been revitalized by the identification of parameters which predispose patients to graft-induced dyskinesias and by the emergence of novel methods of generating dopaminergic neurons. Hopefully, the Transeuro clinical trials will give further impetus and act as a stepping stone to future trials employing stem-cell-derived neurons.
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Abstract
The transplantation of dopaminergic cells for the treatment of symptoms of Parkinson’s disease has several hurdles to overcome before it can be considered a successful therapeutic approach. One issue is the development of abnormal involuntary movements in the absence of L-3,4-dihydroxyphenylalanine following the transplantation of fetal ventral mesencephalon identified in three different clinical trials. Hypotheses as to the cause of these movements include: the composition of the graft, size of the graft, L-3,4-dihydroxyphenylalanine exposure and L-3,4-dihydroxyphenylalanine-induced dyskinesia prior to transplantation and inflammatory responses in and around the graft. We evaluate the clinical evidence supporting these hypotheses and the preclinical models upon which experiments are being based to resolve them.
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Affiliation(s)
- E L Lane
- Brain Repair Group, School of Bioscience, Cardiff University, Cardiff CF10 3AX, Wales, UK.
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Kuhn DM, Sykes CE, Geddes TJ, Jaunarajs KLE, Bishop C. Tryptophan hydroxylase 2 aggregates through disulfide cross-linking upon oxidation: possible link to serotonin deficits and non-motor symptoms in Parkinson's disease. J Neurochem 2010; 116:426-37. [PMID: 21105877 DOI: 10.1111/j.1471-4159.2010.07123.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disorder characterized by the loss of dopamine neurons of the nigrostriatal system, resulting in severe motor disturbances. Although much less appreciated, non-motor symptoms are also very common in PD and many can be traced to serotonin neuronal deficits. Tryptophan hydroxylase (TPH) 2, the rate-limiting enzyme in the serotonin biosynthesis, is a phenotypic marker for serotonin neurons and is known to be extremely labile to oxidation. Therefore, the oxidative processes that prevail in PD could cause TPH2 misfolding and modify serotonin neuronal function much as is seen in dopamine neurons. Oxidation of TPH2 inhibits enzyme activity and leads to the formation of high molecular weight aggregates in a dithiothreitol-reversible manner. Cysteine-scanning mutagenesis shows that as long as a single cysteine residue (out of a total of 13 per monomer) remains in TPH2, it cross-links upon oxidation and only cysteine-less mutants are resistant to this effect. The effects of oxidants on TPH2 catalytic function and cross-linking are also observed in intact TPH2-expressing HEK293 cells. Oxidation shifts TPH2 from the soluble compartment into membrane fractions and large inclusion bodies. Sequential non-reducing/reducing 2-dimensional sodium dodecyl sulfate-polyacrylamide gel electrophoresis and immunoblotting confirmed that TPH2 was one of a small number of cytosolic proteins that form disulfide-bonded aggregates. The propensity of TPH2 to misfold upon oxidation of its cysteine residues is responsible for its catalytic lability and may be related to loss of serotonin neuronal function in PD and the emergence of non-motor (psychiatric) symptoms.
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Affiliation(s)
- Donald M Kuhn
- Department of Psychiatry & Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, USA.
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Buck K, Ferger B. l-DOPA-induced dyskinesia in Parkinson's disease: a drug discovery perspective. Drug Discov Today 2010; 15:867-75. [DOI: 10.1016/j.drudis.2010.08.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Revised: 07/28/2010] [Accepted: 08/20/2010] [Indexed: 12/26/2022]
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Eskow Jaunarajs KL, Angoa-Perez M, Kuhn DM, Bishop C. Potential mechanisms underlying anxiety and depression in Parkinson's disease: consequences of l-DOPA treatment. Neurosci Biobehav Rev 2010; 35:556-64. [PMID: 20615430 DOI: 10.1016/j.neubiorev.2010.06.007] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 06/29/2010] [Accepted: 06/29/2010] [Indexed: 01/19/2023]
Abstract
Though the most recognizable symptoms of Parkinson's disease (PD) are motor-related, many patients also suffer from debilitating affective symptoms that deleteriously influence quality of life. Dopamine (DA) loss is likely involved in the onset of depression and anxiety in PD. However, these symptoms are not reliably improved by DA replacement therapy with l-3,4-dihydroxyphenylalanine (l-DOPA). In fact, preclinical and clinical evidence suggests that l-DOPA treatment may worsen affect. Though the neurobiological mechanisms remain unclear, recent research contends that l-DOPA further perturbs the function of the norepinephrine and serotonin systems, already affected by PD pathology, which have been intimately linked to the development and expression of anxiety and depression. As such, this review provides an overview of the clinical characteristics of affective disorders in PD, examines the utility of animal models for the study of anxiety and depression in PD, and finally, discusses potential mechanisms by which DA loss and subsequent l-DOPA therapy influence monoamine function and concomitant affective symptoms.
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Affiliation(s)
- Karen L Eskow Jaunarajs
- Behavioral Neuroscience Program, Department of Psychology, State University of New York at Binghamton, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
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Buck K, Voehringer P, Ferger B. The α2adrenoceptor antagonist idazoxan alleviates l-DOPA-induced dyskinesia by reduction of striatal dopamine levels: anin vivomicrodialysis study in 6-hydroxydopamine-lesioned rats. J Neurochem 2010; 112:444-52. [DOI: 10.1111/j.1471-4159.2009.06482.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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