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Shanab O, Mostafa L, Abdeen A, Atia R, Nassar AY, Youssef M, Ibrahim SF, Maher ZM, Imbrea F, Fericean L, Ghareeb K, Hasan T, Ghamry HI, Atawia RT, Sadeq O, Abdelkader A. Modulatory mechanisms of copper II-albumin complex toward N-nitrosodiethylamine-induced neurotoxicity in mice via regulating oxidative damage, inflammatory, and apoptotic signaling pathways. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 270:115841. [PMID: 38113799 DOI: 10.1016/j.ecoenv.2023.115841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 11/17/2023] [Accepted: 12/14/2023] [Indexed: 12/21/2023]
Abstract
N-nitrosodiethylamine (ND) is an extremely toxic unavoidable environmental contaminant. CopperII-albumin (CuAB) complex, a newly developed Cu complex, showed antioxidant and anti-inflammatory potential. Hereby, we explored the plausible neuroprotective role of CuAB complex toward ND-evoked neurotoxicity in mice. Twenty-four male mice were sorted into 4 groups (6 mice each). Control group, mice were administered oral distilled water; and CuAB group, mice received CuAB complex at a dose of 817 µg/kg orally, three times weekly. In ND group, ND was given intraperitoneally (50 mg/kg body weight, once weekly for 6 w). CuAB+ND group, mice were administered a combination of CuAB and ND. The brain was quickly extracted upon completion of the experimental protocol for the evaluation of the oxidative/antioxidative markers, inflammatory cytokines, and histopathological examination. Oxidative stress was induced after ND exposure indicated by a reduction in GSH and SOD1 level, with increased MDA level. In addition, decreased expression of SOD1 proteins, Nrf2, and 5-HT mRNA expression levels were noticed. An apoptotic cascade has also been elicited, evidenced by overexpression of Cyt c, Cl. Casp 3. In addition, increased regulation of proinflammatory genes (TNF-α, IL-6, iNOS, Casp1, and NF-κB (p65/p50); besides, increment of protein expression of P-IKBα and reduced expression of IKBα. Pretreatment with CuAB complex significantly ameliorated ND neuronal damage. Our results recommend CuAB complex supplementation because it exerts neuroprotective effects against ND-induced toxicity.
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Affiliation(s)
- Obeid Shanab
- Department of Biochemistry, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt
| | - Laila Mostafa
- Department of Biochemistry, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt
| | - Ahmed Abdeen
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Benha University, Toukh 13736, Egypt.
| | - Rania Atia
- Department of Physiology, Faculty of Medicine Zagazig University, Zagazig 44519, Egypt; Department of Basic Medical Science, Faculty of Applied Medical Science, Al-Baha University, Al-Baha 65779, Saudi Arabia
| | - Ahmed Y Nassar
- Department of Biochemistry, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Mohammed Youssef
- Department of Animal Physiology, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt
| | - Samah F Ibrahim
- Department of Clinical Sciences, College of Medicine, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Zainab M Maher
- Department of Pathology and Clinical Pathology, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt
| | - Florin Imbrea
- Department of Crop Science, Faculty of Agriculture, University of Life Sciences "King Mihai I" from Timisoara, 119, Calea Aradului, 300645 Timisoara, Romania.
| | - Liana Fericean
- Department of Biology and Plant protection, Faculty of Agriculture. University of Life Sciences "King Michael I" from Timișoara, Calea Aradului 119, CUI 3487181, Romania
| | - Khaled Ghareeb
- Department of Animal and Poultry Behavior and Management, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt
| | - Tabinda Hasan
- Department of Basic Sciences, College of Medicine, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Heba I Ghamry
- Nutrition and Food Sciences, Department of Home Economics, Faculty of Home Economics, King Khalid University, P.O. Box 960, Abha 61421, Saudi Arabia
| | - Reem T Atawia
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt
| | - Omar Sadeq
- Department of Physiology and Pharmacology, Faculty of Medicine, Arab American University Palestine, Jenin B.P. 240, Palestine
| | - Afaf Abdelkader
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Benha University, Benha 13518, Egypt.
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Patricio F, Morales Dávila E, Patricio-Martínez A, Arana Del Carmen N, Martínez I, Aguilera J, Perez-Aguilar JM, Limón ID. Intrapallidal injection of cannabidiol or a selective GPR55 antagonist decreases motor asymmetry and improves fine motor skills in hemiparkinsonian rats. Front Pharmacol 2022; 13:945836. [PMID: 36120297 PMCID: PMC9479130 DOI: 10.3389/fphar.2022.945836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 08/09/2022] [Indexed: 11/28/2022] Open
Abstract
Cannabidiol (CBD) presents antiparkinsonian properties and neuromodulatory effects, possibly due to the pleiotropic activity caused at multiple molecular targets. Recently, the GPR55 receptor has emerged as a molecular target of CBD. Interestingly, GPR55 mRNA is expressed in the external globus pallidus (GPe) and striatum, hence, it has been suggested that its activity is linked to motor dysfunction in Parkinson’s disease (PD). The present study aimed to evaluate the effect of the intrapallidal injection of both CBD and a selective GPR55 antagonist (CID16020046) on motor asymmetry, fine motor skills, and GAD-67 expression in hemiparkinsonian rats. The hemiparkinsonian animal model applied involved the induction of a lesion in male Wistar rats via the infusion of the neurotoxin 6-hydroxydopamine (6-OHDA) into the medial forebrain bundle via stereotaxic surgery. After a period of twenty days, a second surgical procedure was performed to implant a guide cannula into the GPe. Seven days later, lysophosphatidylinositol (LPI), CBD, or CID16020046 were injected once a day for three consecutive days (from the 28th to the 30th day post-lesion). Amphetamine-induced turning behavior was evaluated on the 14th and 30th days post-injury. The staircase test and fine motor skills were evaluated as follows: the rats were subject to a ten-day training period prior to the 6-OHDA injury; from the 15th to the 19th days post-lesion, the motor skills alterations were evaluated under basal conditions; and, from the 28th to the 30th day post-lesion, the pharmacological effects of the drugs administered were evaluated. The results obtained show that the administration of LPI or CBD generated lower levels of motor asymmetry in the turning behavior of hemiparkinsonian rats. It was also found that the injection of CBD or CID16020046, but not LPI, in the hemiparkinsonian rats generated significantly superior performance in the staircase test, in terms of the use of the forelimb contralateral to the 6-OHDA-induced lesion, when evaluated from the 28th to the 30th day post-lesion. Similar results were also observed for superior fine motor skills performance for pronation, grasp, and supination. Finally, the immunoreactivity levels were found to decrease for the GAD-67 enzyme in the striatum and the ipsilateral GPe of the rats injected with CBD and CID16020046, in contrast with those lesioned with 6-OHDA. The results obtained suggest that the inhibitory effects of CBD and CID16020046 on GPR55 in the GPe could be related to GABAergic overactivation in hemiparkinsonism, thus opening new perspectives to explain, at a cellular level, the reversal of the motor impairment observed in PD models.
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Affiliation(s)
- Felipe Patricio
- Laboratorio de Neurofarmacología, Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Eliud Morales Dávila
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Aleidy Patricio-Martínez
- Laboratorio de Neurofarmacología, Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
- Facultad de Ciencias Biológicas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Nayeli Arana Del Carmen
- Laboratorio de Neurofarmacología, Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Isabel Martínez
- Laboratorio de Neuroquímica, Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - José Aguilera
- Departament de Bioquímica i de Biologia Molecular, Facultad de Medicina, Institut de Neurociències, Universitat Autònoma de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | | | - Ilhuicamina Daniel Limón
- Laboratorio de Neurofarmacología, Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
- *Correspondence: Ilhuicamina Daniel Limón, ,
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Tekriwal A, Lintz MJ, Thompson JA, Felsen G. Disrupted basal ganglia output during movement preparation in hemiparkinsonian mice is consistent with behavioral deficits. J Neurophysiol 2021; 126:1248-1264. [PMID: 34406873 DOI: 10.1152/jn.00001.2021] [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: 11/22/2022] Open
Abstract
Parkinsonian motor deficits are associated with elevated inhibitory output from the basal ganglia (BG). However, several features of Parkinson's disease (PD) have not been accounted for by this simple "classical rate model" framework, including the observation in patients with PD that movements guided by external stimuli are less impaired than otherwise identical movements generated based on internal goals. Is this difference due to divergent processing within the BG itself or due to the recruitment of extra-BG pathways by sensory processing? In addition, surprisingly little is known about precisely when, in the sequence from selecting to executing movements, BG output is altered by PD. Here, we address these questions by recording activity in the substantia nigra pars reticulata (SNr), a key BG output nucleus, in hemiparkinsonian mice performing a well-controlled behavioral task requiring stimulus-guided and internally specified directional movements. We found that hemiparkinsonian mice exhibited a bias ipsilateral to the side of dopaminergic cell loss that was stronger when movements were internally specified rather than stimulus guided, consistent with clinical observations in patients with Parkinson's disease. We further found that changes in parkinsonian SNr activity during movement preparation were consistent with the ipsilateral behavioral bias, as well as its greater magnitude for internally specified movements. Although these findings are inconsistent with some aspects of the classical rate model, they are accounted for by a related "directional rate model" positing that SNr output phasically overinhibits motor output in a direction-specific manner. These results suggest that parkinsonian changes in BG output underlying movement preparation contribute to the greater deficit in internally specified than stimulus-guided movements.NEW & NOTEWORTHY Movements of patients with Parkinson's disease are often less impaired when guided by external stimuli than when generated based on internal goals. Whether this effect is due to distinct processing in the basal ganglia (BG) or due to compensation from other motor pathways is an open question with therapeutic implications. We recorded BG output in behaving parkinsonian mice and found that BG activity during movement preparation was consistent with the differences between these forms of movement.
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Affiliation(s)
- Anand Tekriwal
- Department of Physiology and Biophysics, University of Colorado School of Medicine, Aurora, Colorado.,Department of Neurosurgery, University of Colorado School of Medicine, Aurora, Colorado.,Neuroscience Program, University of Colorado School of Medicine, Aurora, Colorado.,Medical Scientist Training Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Mario J Lintz
- Department of Physiology and Biophysics, University of Colorado School of Medicine, Aurora, Colorado.,Department of Psychiatry, University of Colorado School of Medicine, Aurora, Colorado.,Neuroscience Program, University of Colorado School of Medicine, Aurora, Colorado.,Medical Scientist Training Program, University of Colorado School of Medicine, Aurora, Colorado
| | - John A Thompson
- Department of Neurosurgery, University of Colorado School of Medicine, Aurora, Colorado.,Department of Neurology, University of Colorado School of Medicine, Aurora, Colorado.,Neuroscience Program, University of Colorado School of Medicine, Aurora, Colorado.,Medical Scientist Training Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Gidon Felsen
- Department of Physiology and Biophysics, University of Colorado School of Medicine, Aurora, Colorado.,Neuroscience Program, University of Colorado School of Medicine, Aurora, Colorado.,Medical Scientist Training Program, University of Colorado School of Medicine, Aurora, Colorado
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4
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Simorgh S, Bagher Z, Farhadi M, Kamrava SK, Boroujeni ME, Namjoo Z, Hour FQ, Moradi S, Alizadeh R. Magnetic Targeting of Human Olfactory Mucosa Stem Cells Following Intranasal Administration: a Novel Approach to Parkinson's Disease Treatment. Mol Neurobiol 2021; 58:3835-3847. [PMID: 33860441 DOI: 10.1007/s12035-021-02392-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Accepted: 04/08/2021] [Indexed: 12/15/2022]
Abstract
Among the various therapeutic procedures used for improving PD, stem cell-based therapy has been shown to be a promising method. Olfactory ectomesenchymal stem cells (OE-MSCs) are a great source of stem cells for PD. Also, the intranasal administration (INA) of stem cells to the neural lesion has several advantages over the other approaches to cellular injections. However, improving the efficacy of INA to produce the highest number of cells at the lesion site has always been a controversial issue. For this purpose, this study was designed to apply the magnetically targeted cell delivery (MTCD) approach to OE-MSCs in the injured striatum area through the IN route in order to explore their outcomes in rat models of PD. Animals were randomly classified into four groups including control, PD model, treatment-NTC (treated with INA of non-target cells), and treatment-TC (treated with INA of target cells). The Alg-SPIONs-labeled OE-MSCs were stained successfully using the Prussian blue method with an intracellular iron concentration of 2.73 pg/cell. It was able to reduce signal intensity in the striatum region by increasing the number of these cells, as shown by the magnetic resonance imaging (MRI). Behavioral evaluation revealed that the administration of OE-MSCs with this novel advanced stem cell therapy alleviated Parkinson's motor dysfunction. Further, histological evaluations confirmed the functional enhancement of dopaminergic neuron cells by the expression of Nurr1, Dopamine transporter (DAT), and paired-like homeodomain transcription factor 3 (TH). Overall, this study showed that INA of OE-MSCs in the MTCD approach enhanced stem cells' therapeutic effects in PD models.
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Affiliation(s)
- Sara Simorgh
- Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Zohreh Bagher
- ENT and Head and Neck Research Center and Department, Hazrat Rasoul Akram Hospital, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Farhadi
- ENT and Head and Neck Research Center and Department, Hazrat Rasoul Akram Hospital, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Kamran Kamrava
- ENT and Head and Neck Research Center and Department, Hazrat Rasoul Akram Hospital, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Mahdi Eskandarian Boroujeni
- Department of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
| | - Zeinab Namjoo
- Department of Anatomical Science, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Farshid Qiyami Hour
- Department of Anatomical Sciences, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Salah Moradi
- Department of Life Science Engineering, Faculty of New Science and Technology, University of Tehran, Tehran, Iran
| | - Rafieh Alizadeh
- ENT and Head and Neck Research Center and Department, Hazrat Rasoul Akram Hospital, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran.
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5
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Dong J, Hawes S, Wu J, Le W, Cai H. Connectivity and Functionality of the Globus Pallidus Externa Under Normal Conditions and Parkinson's Disease. Front Neural Circuits 2021; 15:645287. [PMID: 33737869 PMCID: PMC7960779 DOI: 10.3389/fncir.2021.645287] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 02/05/2021] [Indexed: 12/18/2022] Open
Abstract
The globus pallidus externa (GPe) functions as a central hub in the basal ganglia for processing motor and non-motor information through the creation of complex connections with the other basal ganglia nuclei and brain regions. Recently, with the adoption of sophisticated genetic tools, substantial advances have been made in understanding the distinct molecular, anatomical, electrophysiological, and functional properties of GPe neurons and non-neuronal cells. Impairments in dopamine transmission in the basal ganglia contribute to Parkinson's disease (PD), the most common movement disorder that severely affects the patients' life quality. Altered GPe neuron activity and synaptic connections have also been found in both PD patients and pre-clinical models. In this review, we will summarize the main findings on the composition, connectivity and functionality of different GPe cell populations and the potential GPe-related mechanisms of PD symptoms to better understand the cell type and circuit-specific roles of GPe in both normal and PD conditions.
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Affiliation(s)
- Jie Dong
- Laboratory of Neurogenetics, Transgenic Section, National Institute on Aging, National Institutes of Health, Bethesda, MD, United States
| | - Sarah Hawes
- Laboratory of Neurogenetics, Transgenic Section, National Institute on Aging, National Institutes of Health, Bethesda, MD, United States
| | - Junbing Wu
- Child Health Institute of New Jersey, Rutgers University, New Brunswick, NJ, United States
| | - Weidong Le
- Liaoning Provincial Center for Clinical Research on Neurological Diseases & Liaoning Provincial Key Laboratory for Research on the Pathogenic Mechanisms of Neurological Diseases, The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Medical School of University of Electronic Science and Technology of China, Institute of Neurology, Sichuan Provincial Hospital, Sichuan Academy of Medical Science, Chengdu, China
| | - Huaibin Cai
- Laboratory of Neurogenetics, Transgenic Section, National Institute on Aging, National Institutes of Health, Bethesda, MD, United States
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Simorgh S, Alizadeh R, Shabani R, Karimzadeh F, Seidkhani E, Majidpoor J, Moradi F, Kasbiyan H. Olfactory mucosa stem cells delivery via nasal route: a simple way for the treatment of Parkinson disease. Neurotox Res 2021; 39:598-608. [PMID: 33433781 DOI: 10.1007/s12640-020-00290-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 09/17/2020] [Accepted: 09/20/2020] [Indexed: 12/11/2022]
Abstract
Finding a simple and effective way for transferring cells to the brain lesion site with minimum side effects mounts a challenge in cell therapy. Cell delivery via nasal route using the bypassing the blood-brain barrier (BBB) property is a simple and non-invasive strategy without serious complications such as trauma. Therefore, it is a suitable technique to treat neurodegenerative disorders like Parkinson's disease (PD). Olfactory ectomesenchymal stem cells (OE-MSCs) located in the lamina propria of olfactory mucosa could be differentiated into dopaminergic neurons under in vitro and in vivo conditions. Thus, OE-MSCs represent a good source of Parkinson's stem cell-based therapy. In this research, we studied thirty male rats (n = 10 in each group) in three control (Ctl), lesion (LE), and intranasal administration (INA) groups to investigate the therapeutic effect of intranasal injection of OE-MSCs in the Parkinson's animal models. To do so, we examined the homing variation of OE-MSCs in different brain regions such as olfactory bulb (OB), cortex, striatum (Str), hippocampus (HPC), and substantia nigra (SN). The results of real-time PCR and immunohistochemistry (IHC) analysis showed the expression of dopaminergic neuron markers such as PITX3, PAX2, PAX5 (as dopaminergic neurons markers), tyrosine hydroxylase (TH), and dopamine transporter (DAT) 2 months after INA of 1 × 106 OE-MSCs. The results confirmed that IN OE-MSCs delivery into the central nervous system (CNS) was powerful enough to improve the behavioral functions in the animal models of PD.
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Affiliation(s)
- Sara Simorgh
- Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Rafieh Alizadeh
- ENT and Head & Neck Research Center and Department, The Five Senses Institute, HazratRasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Ronk Shabani
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Fariba Karimzadeh
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Elham Seidkhani
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Jamal Majidpoor
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Moradi
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. .,Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran.
| | - Hamidreza Kasbiyan
- Department of chemical engineering, Universitat Politècnica de Catalunya, Barcelona, Spain.
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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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Abstract
BACKGROUND Sleepiness and decrease in attention are dose-limiting side effects of opioids. The orexin/hypocretin system plays an important role in maintaining wakefulness. This study aimed to explore the potential of a nonpeptide orexin receptor agonist to alleviate morphine-induced sedative effects. METHODS Morphine sedative effects were evaluated as changes in electroencephalogram (EEG), locomotor activity, and acoustic startle response in rats (n = 5 to 9 per group). Effects of intracerebroventricular orexin-A and systemic orexin type-2 receptor agonist, YNT-185, on EEG changes induced by morphine were examined. Furthermore, the authors examined effects of morphine administered with or without YNT-185 on locomotor activity and on acoustic startle response. RESULTS Morphine-induced, frequent, short epochs of increased power (total epoch duration: 0.5 [0.0 to 8.0] s/10 min during baseline vs. 74.0 [49.0 to 115.0] s/10 min during the post-morphine administration period; P = 0.012). EEG analyses revealed that morphine-induced, high-amplitude, slow activity (increase in spectral power of frequencies less than 15 Hz, baseline vs. postmorphine; P < 0.001). Orexin-A and YNT-185 attenuated these changes. Locomotor activity decreased after morphine (268 [103 to 889] ambulatory movement counts during baseline period [20 min] vs. 138 [7 to 434] counts during 40 to 59 min postadministration; P = 0.012), but did not change after morphine with YNT-185 (363 [121 to 636] vs. 864 [381 to 1092] counts, difference within morphine + YNT-185 group; P = 0.071). Startle response latency was longer after morphine (26 [20 to 28] ms) than after morphine with YNT-185 (17 [16 to 18] ms; P = 0.012). CONCLUSIONS Orexin-A and/or YNT-185 attenuated morphine-induced sedative effects assessed by EEG changes and behavioral measures in rats. The authors' results suggest that orexin-2 receptor activation alleviates morphine-induced sedative effects.
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Simorgh S, Alizadeh R, Eftekharzadeh M, Haramshahi SMA, Milan PB, Doshmanziari M, Ramezanpour F, Gholipourmalekabadi M, Seifi M, Moradi F. Olfactory mucosa stem cells: An available candidate for the treatment of the Parkinson's disease. J Cell Physiol 2019; 234:23763-23773. [PMID: 31173364 DOI: 10.1002/jcp.28944] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 05/22/2019] [Accepted: 05/23/2019] [Indexed: 01/01/2023]
Abstract
Olfactory ectomesenchymal stem cells (OE-MSCs) possess the immunosuppressive activity and regeneration capacity and hold a lot of promises for neurodegenerative disorders treatment. This study aimed to determine OE-MSCs which are able to augment and differentiate into functional neurons and regenerate the CNS and also examine whether the implantation of OE-MSCs in the pars compacta of the substantia nigra (SNpc) can improve Parkinson's symptoms in a rat model-induced with 6-hydroxydopamine. We isolated OE-MSCs from lamina propria in olfactory mucosa and characterized them using flow cytometry and immunocytochemistry. The therapeutic potential of OE-MSCs was evaluated by the transplantation of isolated cells using a rat model of acute SN injury as a Parkinson's disease. Significant behavioral improvement in Parkinsonian rats was elicited by the OE-MSCs. The results demonstrate that the expression of PAX2, PAX5, PITX3, dopamine transporter, and tyrosine hydroxylase was increased by OE-MSCs compared to the control group which is analyzed with real-time polymerase chain reaction technique and immunohistochemical staining. In the outcome, the transplantation of 1,1'-dioctadecyl-3,3,3'3'-tetramethyl indocarbocyanine perchlorate labeled OE-MSCs that were fully differentiated to dopaminergic neurons contribute to a substantial improvement in patients with Parkinson's. Together, our results provide that using OE-MSCs in neurodegenerative disorders might lead to better neural regeneration.
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Affiliation(s)
- Sara Simorgh
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Rafieh Alizadeh
- ENT and Head & Neck Research Center and Department, The Five Senses Institute, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Mina Eftekharzadeh
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Mohammad Amin Haramshahi
- Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Peiman Brouki Milan
- Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, Iran
| | - Maryam Doshmanziari
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Farnaz Ramezanpour
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | | | - Morteza Seifi
- Departments of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Fatemeh Moradi
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Hawlitschka A, Holzmann C, Wree A, Antipova V. Repeated Intrastriatal Botulinum Neurotoxin-A Injection in Hemiparkinsonian Rats Increased the Beneficial Effect on Rotational Behavior. Toxins (Basel) 2018; 10:E368. [PMID: 30208596 PMCID: PMC6162461 DOI: 10.3390/toxins10090368] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 09/04/2018] [Accepted: 09/08/2018] [Indexed: 01/20/2023] Open
Abstract
Injection of botulinum neurotoxin-A (BoNT-A) into the striatum of hemiparkinsonian (hemi-PD) rats reduced apomorphine-induced rotation behavior significantly, for at least 3 months. Thereafter, rotation behavior increased again. We injected hemi-PD rats with 1 ng BoNT-A twice, the second injection following 6 months after the first one and tested the rats for apomorphine-induced rotations and spontaneous motor behaviors, i.e., corridor task and stepping test. To test the hypothesis that BoNT-A reduced striatal hypercholinism in hemi-PD rats, the acetylcholinesterase inhibitor donepezil was injected prior to separate apomorphine-induced rotation tests. In hemi-PD rats, the first BoNT-A injection led to a clear reduction of the apomorphine-induced rotations, and the second BoNT-A injection to a more massive and prolonged reaction. In hemi-PD rats whose apomorphine-induced rotation behavior was strongly reduced by an intrastriatal BoNT-A, subsequent donepezil injections led to significant increases of the rotation rate. Concerning corridor task and stepping test, neither first nor second BoNT-A injections changed hemi-PD rats' behavior significantly. The data give evidence for the possibility of repeated intrastriatal administrations of BoNT-A, for treatment of motor symptoms in experimental hemi-PD over a longer time.
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Affiliation(s)
| | - Carsten Holzmann
- Institute of Medical Genetics, Rostock University Medical Center, D-18057 Rostock, Germany.
| | - Andreas Wree
- Institute of Anatomy, Rostock University Medical Center, D-18057 Rostock, Germany.
| | - Veronica Antipova
- Institute of Anatomy, Rostock University Medical Center, D-18057 Rostock, Germany.
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Macroscopic and Clinical Anatomy, Medical University of Graz, A-8010 Graz, Austria.
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Npas1+ Pallidal Neurons Target Striatal Projection Neurons. J Neurosci 2017; 36:5472-88. [PMID: 27194328 DOI: 10.1523/jneurosci.1720-15.2016] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 04/03/2016] [Indexed: 11/21/2022] Open
Abstract
UNLABELLED Compelling evidence demonstrates that the external globus pallidus (GPe) plays a key role in processing sensorimotor information. An anatomical projection from the GPe to the dorsal striatum has been described for decades. However, the cellular target and functional impact of this projection remain unknown. Using cell-specific transgenic mice, modern monosynaptic tracing techniques, and optogenetics-based mapping, we discovered that GPe neurons provide inhibitory inputs to direct and indirect pathway striatal projection neurons (SPNs). Our results indicate that the GPe input to SPNs arises primarily from Npas1-expressing neurons and is strengthened in a chronic Parkinson's disease (PD) model. Alterations of the GPe-SPN input in a PD model argue for the critical position of this connection in regulating basal ganglia motor output and PD symptomatology. Finally, chemogenetic activation of Npas1-expressing GPe neurons suppresses motor output, arguing that strengthening of the GPe-SPN connection is maladaptive and may underlie the hypokinetic symptoms in PD. SIGNIFICANCE STATEMENT An anatomical projection from the pallidum to the striatum has been described for decades, but little is known about its connectivity pattern. The authors dissect the presynaptic and postsynaptic neurons involved in this projection, and show its cell-specific remodeling and strengthening in parkinsonian mice. Chemogenetic activation of Npas1(+) pallidal neurons that give rise to the principal pallidostriatal projection increases the time that the mice spend motionless. This argues that maladaptive strengthening of this connection underlies the paucity of volitional movements, which is a hallmark of Parkinson's disease.
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Antipova VA, Holzmann C, Schmitt O, Wree A, Hawlitschka A. Botulinum Neurotoxin A Injected Ipsilaterally or Contralaterally into the Striatum in the Rat 6-OHDA Model of Unilateral Parkinson's Disease Differently Affects Behavior. Front Behav Neurosci 2017; 11:119. [PMID: 28680396 PMCID: PMC5478737 DOI: 10.3389/fnbeh.2017.00119] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 06/06/2017] [Indexed: 12/30/2022] Open
Abstract
Parkinson's disease (PD) is one of the most frequent neurodegenerative disorders. The loss of dopaminergic neurons in the substantia nigra leads to a disinhibition of cholinergic interneurons in the striatum. Pharmacotherapeutical strategies of PD-related hypercholinism have numerous adverse side effects. We previously showed that ipsilateral intrastriatal injections of 1 ng in unilaterally 6-hydroxydopamine (6-OHDA)-lesioned rats inhibit apomorphine-induced rotation behavior significantly up to 6 months. In this study, we extended the behavioral testing of ipsilateral botulinum neurotoxin A (BoNT-A)-injection and additionally investigated the impact of intrastriatal BoNT-A-injections contralateral to the 6-OHDA-lesioned hemisphere on the basal ganglia circuity and motor functions. We hypothesized that the interhemispheric differences of acetylcholine (ACh) concentration seen in unilateral hemi-PD should be differentially and temporally influenced by the ipsilateral or contralateral injection of BoNT-A. Hemi-PD rats were injected with 1 ng BoNT-A or vehicle substance into either the ipsilateral or contralateral striatum 6 weeks after 6-OHDA-lesion and various behaviors were tested. In hemi-PD rats intrastriatal ipsilateral BoNT-A-injections significantly reduced apomorphine-induced rotations and increased amphetamine-induced rotations, but showed no significant improvement of forelimb usage and akinesia, lateralized sensorimotor integration and also no effect on spontaneous locomotor activity. However, intrastriatal BoNT-A-injections contralateral to the lesion led to a significant increase of the apomorphine-induced turning rate only 2 weeks after the treatment. The apomorphine-induced rotation rate decreases thereafter to a value below the initial rotation rate. Amphetamine-induced rotations were not significantly changed after BoNT-A-application in comparison to sham-treated animals. Forelimb usage was temporally improved by contralateral BoNT-A-injection at 2 weeks after BoNT-A. Akinesia and lateralized sensorimotor integration were also improved, but contralateral BoNT-A-injection had no significant effect on spontaneous locomotor activity. These long-ranging and different effects suggest that intrastriatally applied BoNT-A acts not only as an inhibitor of ACh release but also has long-lasting impact on transmitter expression and thereby on the basal ganglia circuitry. Evaluation of changes of transmitter receptors is subject of ongoing studies of our group.
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Affiliation(s)
- Veronica A. Antipova
- Institute of Anatomy, Rostock University Medical CenterRostock, Germany
- Institute of Macroscopic and Clinical Anatomy, Medical University of GrazGraz, Austria
| | - Carsten Holzmann
- Institute of Medical Genetics, Rostock University Medical CenterRostock, Germany
| | - Oliver Schmitt
- Institute of Anatomy, Rostock University Medical CenterRostock, Germany
| | - Andreas Wree
- Institute of Anatomy, Rostock University Medical CenterRostock, Germany
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Asakawa T, Fang H, Sugiyama K, Nozaki T, Hong Z, Yang Y, Hua F, Ding G, Chao D, Fenoy AJ, Villarreal SJ, Onoe H, Suzuki K, Mori N, Namba H, Xia Y. Animal behavioral assessments in current research of Parkinson's disease. Neurosci Biobehav Rev 2016; 65:63-94. [PMID: 27026638 DOI: 10.1016/j.neubiorev.2016.03.016] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 03/22/2016] [Accepted: 03/22/2016] [Indexed: 12/21/2022]
Abstract
Parkinson's disease (PD), a neurodegenerative disorder, is traditionally classified as a movement disorder. Patients typically suffer from many motor dysfunctions. Presently, clinicians and scientists recognize that many non-motor symptoms are associated with PD. There is an increasing interest in both motor and non-motor symptoms in clinical studies on PD patients and laboratory research on animal models that imitate the pathophysiologic features and symptoms of PD patients. Therefore, appropriate behavioral assessments are extremely crucial for correctly understanding the mechanisms of PD and accurately evaluating the efficacy and safety of novel therapies. This article systematically reviews the behavioral assessments, for both motor and non-motor symptoms, in various animal models involved in current PD research. We addressed the strengths and weaknesses of these behavioral tests and their appropriate applications. Moreover, we discussed potential mechanisms behind these behavioral tests and cautioned readers against potential experimental bias. Since most of the behavioral assessments currently used for non-motor symptoms are not particularly designed for animals with PD, it is of the utmost importance to greatly improve experimental design and evaluation in PD research with animal models. Indeed, it is essential to develop specific assessments for non-motor symptoms in PD animals based on their characteristics. We concluded with a prospective view for behavioral assessments with real-time assessment with mobile internet and wearable device in future PD research.
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Affiliation(s)
- Tetsuya Asakawa
- Department of Neurosurgery, Hamamatsu University School of Medicine, Hamamatsu-city, Shizuoka, Japan; Department of Psychiatry, Hamamatsu University School of Medicine, Hamamatsu-city, Shizuoka, Japan.
| | - Huan Fang
- Department of Pharmacy, Jinshan Hospital of Fudan University, Shanghai, China
| | - Kenji Sugiyama
- Department of Neurosurgery, Hamamatsu University School of Medicine, Hamamatsu-city, Shizuoka, Japan
| | - Takao Nozaki
- Department of Neurosurgery, Hamamatsu University School of Medicine, Hamamatsu-city, Shizuoka, Japan
| | - Zhen Hong
- Department of Neurology, Huashan Hospital of Fudan University, Shanghai, China
| | - Yilin Yang
- The First People's Hospital of Changzhou, Soochow University School of Medicine, Changzhou, China
| | - Fei Hua
- The First People's Hospital of Changzhou, Soochow University School of Medicine, Changzhou, China
| | - Guanghong Ding
- Shanghai Key Laboratory of Acupuncture Mechanism and Acupoint Function, Fudan University, Shanghai, China
| | - Dongman Chao
- Department of Neurosurgery, The University of Texas McGovern Medical School,Houston, TX, USA
| | - Albert J Fenoy
- Department of Neurosurgery, The University of Texas McGovern Medical School,Houston, TX, USA
| | - Sebastian J Villarreal
- Department of Neurosurgery, The University of Texas McGovern Medical School,Houston, TX, USA
| | - Hirotaka Onoe
- Functional Probe Research Laboratory, RIKEN Center for Life Science Technologies, Kobe, Japan
| | - Katsuaki Suzuki
- Department of Psychiatry, Hamamatsu University School of Medicine, Hamamatsu-city, Shizuoka, Japan
| | - Norio Mori
- Department of Psychiatry, Hamamatsu University School of Medicine, Hamamatsu-city, Shizuoka, Japan
| | - Hiroki Namba
- Department of Neurosurgery, Hamamatsu University School of Medicine, Hamamatsu-city, Shizuoka, Japan
| | - Ying Xia
- Department of Neurosurgery, The University of Texas McGovern Medical School,Houston, TX, USA.
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Mamad O, Delaville C, Benjelloun W, Benazzouz A. Dopaminergic control of the globus pallidus through activation of D2 receptors and its impact on the electrical activity of subthalamic nucleus and substantia nigra reticulata neurons. PLoS One 2015; 10:e0119152. [PMID: 25742005 PMCID: PMC4350999 DOI: 10.1371/journal.pone.0119152] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 01/09/2015] [Indexed: 11/19/2022] Open
Abstract
The globus pallidus (GP) receives dopaminergic afferents from the pars compacta of substantia nigra and several studies suggested that dopamine exerts its action in the GP through presynaptic D2 receptors (D2Rs). However, the impact of dopamine in GP on the pallido-subthalamic and pallido-nigral neurotransmission is not known. Here, we investigated the role of dopamine, through activation of D2Rs, in the modulation of GP neuronal activity and its impact on the electrical activity of subthalamic nucleus (STN) and substantia nigra reticulata (SNr) neurons. Extracellular recordings combined with local intracerebral microinjection of drugs were done in male Sprague-Dawley rats under urethane anesthesia. We showed that dopamine, when injected locally, increased the firing rate of the majority of neurons in the GP. This increase of the firing rate was mimicked by quinpirole, a D2R agonist, and prevented by sulpiride, a D2R antagonist. In parallel, the injection of dopamine, as well as quinpirole, in the GP reduced the firing rate of majority of STN and SNr neurons. However, neither dopamine nor quinpirole changed the tonic discharge pattern of GP, STN and SNr neurons. Our results are the first to demonstrate that dopamine through activation of D2Rs located in the GP plays an important role in the modulation of GP-STN and GP-SNr neurotransmission and consequently controls STN and SNr neuronal firing. Moreover, we provide evidence that dopamine modulate the firing rate but not the pattern of GP neurons, which in turn control the firing rate, but not the pattern of STN and SNr neurons.
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Affiliation(s)
- Omar Mamad
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000, Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000, Bordeaux, France
- Université Mohamed V-Agdal, Faculté des Sciences, Equipe Rythmes Biologiques, Neurosciences et Environnement, 10000, Rabat, Morocco
| | - Claire Delaville
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000, Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000, Bordeaux, France
| | - Wail Benjelloun
- Université Mohamed V-Agdal, Faculté des Sciences, Equipe Rythmes Biologiques, Neurosciences et Environnement, 10000, Rabat, Morocco
| | - Abdelhamid Benazzouz
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000, Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000, Bordeaux, France
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15
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Hernández-Martínez R, Aceves JJ, Rueda-Orozco PE, Hernández-Flores T, Hernández-González O, Tapia D, Galarraga E, Bargas J. Muscarinic presynaptic modulation in GABAergic pallidal synapses of the rat. J Neurophysiol 2015; 113:796-807. [DOI: 10.1152/jn.00385.2014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The external globus pallidus (GPe) is central for basal ganglia processing. It expresses muscarinic cholinergic receptors and receives cholinergic afferents from the pedunculopontine nuclei (PPN) and other regions. The role of these receptors and afferents is unknown. Muscarinic M1-type receptors are expressed by synapses from striatal projection neurons (SPNs). Because axons from SPNs project to the GPe, one hypothesis is that striatopallidal GABAergic terminals may be modulated by M1 receptors. Alternatively, some M1 receptors may be postsynaptic in some pallidal neurons. Evidence of muscarinic modulation in any of these elements would suggest that cholinergic afferents from the PPN, or other sources, could modulate the function of the GPe. In this study, we show this evidence using striatopallidal slice preparations: after field stimulation in the striatum, the cholinergic muscarinic receptor agonist muscarine significantly reduced the amplitude of inhibitory postsynaptic currents (IPSCs) from synapses that exhibited short-term synaptic facilitation. This inhibition was associated with significant increases in paired-pulse facilitation, and quantal content was proportional to IPSC amplitude. These actions were blocked by atropine, pirenzepine, and mamba toxin-7, suggesting that receptors involved were M1. In addition, we found that some pallidal neurons have functional postsynaptic M1 receptors. Moreover, some evoked IPSCs exhibited short-term depression and a different kind of modulation: they were indirectly modulated by muscarine via the activation of presynaptic cannabinoid CB1 receptors. Thus pallidal synapses presenting distinct forms of short-term plasticity were modulated differently.
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Affiliation(s)
- Ricardo Hernández-Martínez
- Instituto de Fisiología Celular, División de Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - José J. Aceves
- Instituto de Fisiología Celular, División de Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Pavel E. Rueda-Orozco
- Instituto de Fisiología Celular, División de Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Teresa Hernández-Flores
- Instituto de Fisiología Celular, División de Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Omar Hernández-González
- Instituto de Fisiología Celular, División de Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Dagoberto Tapia
- Instituto de Fisiología Celular, División de Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Elvira Galarraga
- Instituto de Fisiología Celular, División de Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - José Bargas
- Instituto de Fisiología Celular, División de Neurociencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Ellens DJ, Leventhal DK. Review: electrophysiology of basal ganglia and cortex in models of Parkinson disease. JOURNAL OF PARKINSONS DISEASE 2014; 3:241-54. [PMID: 23948994 DOI: 10.3233/jpd-130204] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Incomplete understanding of the systems-level pathophysiology of Parkinson Disease (PD) remains a significant barrier to improving its treatment. Substantial progress has been made, however, due to the availability of neurotoxins that selectively target monoaminergic (in particular, dopaminergic) neurons. This review discusses the in vivo electrophysiology of basal ganglia (BG), thalamic, and cortical regions after dopamine-depleting lesions. These include firing rate changes, neuronal burst-firing, neuronal oscillations, and neuronal synchrony that result from a combination of local microanatomic changes and network-level interactions. While much is known of the clinical and electrophysiological phenomenology of dopamine loss, a critical gap in our conception of PD pathophysiology is the link between them. We discuss potential mechanisms by which these systems-level electrophysiological changes may emerge, as well as how they may relate to clinical parkinsonism. Proposals for an updated understanding of BG function are reviewed, with an emphasis on how emerging frameworks will guide future research into the pathophysiology and treatment of PD.
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Affiliation(s)
- Damien J Ellens
- Department of Neurology, University of Michigan Medical School, MI, USA
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17
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Deng WS, Jiang YX, Han XH, Xue Y, Wang H, Sun P, Chen L. HCN Channels Modulate the Activity of the Subthalamic Nucleus In Vivo. J Mol Neurosci 2014; 55:260-268. [DOI: 10.1007/s12031-014-0316-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 04/24/2014] [Indexed: 01/17/2023]
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Benazzouz A, Mamad O, Abedi P, Bouali-Benazzouz R, Chetrit J. Involvement of dopamine loss in extrastriatal basal ganglia nuclei in the pathophysiology of Parkinson's disease. Front Aging Neurosci 2014; 6:87. [PMID: 24860498 PMCID: PMC4026754 DOI: 10.3389/fnagi.2014.00087] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 04/23/2014] [Indexed: 11/13/2022] Open
Abstract
Parkinson's disease (PD) is a neurological disorder characterized by the manifestation of motor symptoms, such as akinesia, muscle rigidity and tremor at rest. These symptoms are classically attributed to the degeneration of dopamine neurons in the pars compacta of substantia nigra (SNc), which results in a marked dopamine depletion in the striatum. It is well established that dopamine neurons in the SNc innervate not only the striatum, which is the main target, but also other basal ganglia nuclei including the two segments of globus pallidus and the subthalamic nucleus (STN). The role of dopamine and its depletion in the striatum is well known, however, the role of dopamine depletion in the pallidal complex and the STN in the genesis of their abnormal neuronal activity and in parkinsonian motor deficits is still not clearly determined. Based on recent experimental data from animal models of Parkinson's disease in rodents and non-human primates and also from parkinsonian patients, this review summarizes current knowledge on the role of dopamine in the modulation of basal ganglia neuronal activity and also the role of dopamine depletion in these nuclei in the pathophysiology of Parkinson's disease.
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Affiliation(s)
- Abdelhamid Benazzouz
- Institut des Maladies Neurodégénératives, Université Bordeaux Segalen, UMR 5293 Bordeaux, France ; CNRS, Institut des Maladies Neurodégénératives, Université Bordeaux Segalen, UMR 5293 Bordeaux, France
| | - Omar Mamad
- Institut des Maladies Neurodégénératives, Université Bordeaux Segalen, UMR 5293 Bordeaux, France ; CNRS, Institut des Maladies Neurodégénératives, Université Bordeaux Segalen, UMR 5293 Bordeaux, France ; Faculté des Sciences, Equipe Rythmes Biologiques, Neurosciences et Environnement, Université Mohamed V-Agdal Rabat, Morocco
| | - Pamphyle Abedi
- Institut des Maladies Neurodégénératives, Université Bordeaux Segalen, UMR 5293 Bordeaux, France ; CNRS, Institut des Maladies Neurodégénératives, Université Bordeaux Segalen, UMR 5293 Bordeaux, France ; Faculté des Sciences, Equipe Rythmes Biologiques, Neurosciences et Environnement, Université Mohamed V-Agdal Rabat, Morocco
| | - Rabia Bouali-Benazzouz
- Institut Interdisciplinaire des Neurosciences, Université Bordeaux Segalen, UMR 5297 Bordeaux, France
| | - Jonathan Chetrit
- Institut des Maladies Neurodégénératives, Université Bordeaux Segalen, UMR 5293 Bordeaux, France ; CNRS, Institut des Maladies Neurodégénératives, Université Bordeaux Segalen, UMR 5293 Bordeaux, France
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Qiu MH, Chen MC, Huang ZL, Lu J. Neuronal activity (c-Fos) delineating interactions of the cerebral cortex and basal ganglia. Front Neuroanat 2014; 8:13. [PMID: 24723855 PMCID: PMC3972462 DOI: 10.3389/fnana.2014.00013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 03/03/2014] [Indexed: 11/13/2022] Open
Abstract
The cerebral cortex and basal ganglia (BG) form a neural circuit that is disrupted in disorders such as Parkinson's disease. We found that neuronal activity (c-Fos) in the BG followed cortical activity, i.e., high in arousal state and low in sleep state. To determine if cortical activity is necessary for BG activity, we administered atropine to rats to induce a dissociative state resulting in slow-wave electroencephalography but hyperactive motor behaviors. Atropine blocked c-Fos expression in the cortex and BG, despite high c-Fos expression in the sub-cortical arousal neuronal groups and thalamus, indicating that cortical activity is required for BG activation. To identify which glutamate receptors in the BG that mediate cortical inputs, we injected ketamine [N-methyl-d-aspartate (NMDA) receptor antagonist] and 6-cyano-nitroquinoxaline-2, 3-dione (CNQX, a non-NMDA receptor antagonist). Systemic ketamine and CNQX administration revealed that NMDA receptors mediated subthalamic nucleus (STN) input to internal globus pallidus (GPi) and substantia nigra pars reticulata (SNr), while non-NMDA receptor mediated cortical input to the STN. Both types of glutamate receptors were involved in mediating cortical input to the striatum. Dorsal striatal (caudoputamen, CPu) dopamine depletion by 6-hydroxydopamine resulted in reduced activity of the CPu, globus pallidus externa (GPe), and STN but increased activity of the GPi, SNr, and putative layer V neurons in the motor cortex. Our results reveal that the cortical activity is necessary for BG activity and clarifies the pathways and properties of the BG-cortical network and their putative role in the pathophysiology of BG disorders.
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Affiliation(s)
- Mei-Hong Qiu
- State Key Laboratory of Medical Neurobiology and Department of Neurobiology, School of Basic Medical Science, Fudan University Shanghai, China
| | - Michael C Chen
- Neurology Department and Division of Sleep Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School Boston, MA, USA
| | - Zhi-Li Huang
- State Key Laboratory of Medical Neurobiology and Department of Neurobiology, School of Basic Medical Science, Fudan University Shanghai, China ; Department of Pharmacology, School of Basic Medical Science, Fudan University Shanghai, China ; Institute of Brain Science, Fudan University Shanghai, China
| | - Jun Lu
- Neurology Department and Division of Sleep Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School Boston, MA, USA
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Inhibiting subthalamic D5 receptor constitutive activity alleviates abnormal electrical activity and reverses motor impairment in a rat model of Parkinson's disease. J Neurosci 2013; 33:14840-9. [PMID: 24027284 DOI: 10.1523/jneurosci.0453-13.2013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Burst firing has been reported as a pathological activity of subthalamic nucleus (STN) neurons in Parkinson's disease. However, the origin of bursts and their causal link with motor deficits remain unknown. Here we tested the hypothesis that dopamine D5 receptors (D5Rs), characterized by a high constitutive activity, may contribute to the emergence of burst firing in STN. We tested whether inhibiting D5R constitutive activity depresses burst firing and alleviates motor impairments in the 6-OHDA rat model of Parkinson's disease. Intrasubthalamic microinjections of either an inverse agonist of D5Rs, flupenthixol, or a D2R antagonist, raclopride, were applied. Behavioral experiments, in vivo and in vitro electrophysiological recordings, and ex vivo functional neuroanatomy studies were performed. Using [(5)S]GTPγ binding autoradiography, we show that application of flupenthixol inhibits D5R constitutive activity within the STN. Furthermore, flupenthixol reduced evoked burst in brain slices and converted pathological burst firing into physiological tonic, single-spike firing in 6-OHDA rats in vivo. This later action was mimicked by calciseptine, a Cav1 channel blocker. Moreover, the same treatment dramatically attenuated motor impairment in this model and normalized metabolic hyperactivity in both STN and substantia nigra pars reticulata, the main output structure of basal ganglia in rats. In contrast, raclopride as well as saline did not reverse burst firing and motor deficits, confirming the selective action of flupenthixol on D5Rs. These results are the first to demonstrate that subthalamic D5Rs are involved in the pathophysiology of Parkinson's disease and that administering an inverse agonist of these receptors may lessen motor symptoms.
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Schwab BC, Heida T, Zhao Y, Marani E, van Gils SA, van Wezel RJA. Synchrony in Parkinson's disease: importance of intrinsic properties of the external globus pallidus. Front Syst Neurosci 2013; 7:60. [PMID: 24109437 PMCID: PMC3789943 DOI: 10.3389/fnsys.2013.00060] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 09/13/2013] [Indexed: 12/15/2022] Open
Abstract
The mechanisms for the emergence and transmission of synchronized oscillations in Parkinson's disease, which are potentially causal to motor deficits, remain debated. Aside from the motor cortex and the subthalamic nucleus, the external globus pallidus (GPe) has been shown to be essential for the maintenance of these oscillations and plays a major role in sculpting neural network activity in the basal ganglia (BG). While neural activity of the healthy GPe shows almost no correlations between pairs of neurons, prominent synchronization in the β frequency band arises after dopamine depletion. Several studies have proposed that this shift is due to network interactions between the different BG nuclei, including the GPe. However, recent studies demonstrate an important role for the properties of neurons within the GPe. In this review, we will discuss these intrinsic GPe properties and review proposed mechanisms for activity decorrelation within the dopamine-intact GPe. Failure of the GPe to desynchronize correlated inputs can be a possible explanation for synchronization in the whole BG. Potential triggers of synchronization involve the enhancement of GPe-GPe inhibition and changes in ion channel function in GPe neurons.
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Affiliation(s)
- Bettina C Schwab
- Applied Analysis and Mathematical Physics, MIRA Institute of Technical Medicine and Biomedical Technology, University of Twente Enschede, Netherlands ; Biomedical Signals and Systems, MIRA Institute of Technical Medicine and Biomedical Technology, University of Twente Enschede, Netherlands
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