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Beaver ML, Evans RC. Muscarinic receptor activation preferentially inhibits rebound in vulnerable dopaminergic neurons. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.30.605819. [PMID: 39131326 PMCID: PMC11312546 DOI: 10.1101/2024.07.30.605819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
Dopaminergic subpopulations of the substantia nigra pars compacta (SNc) differentially degenerate in Parkinson's disease and are characterized by unique electrophysiological properties. The vulnerable population expresses a T-type calcium channel-mediated afterdepolarization (ADP) and shows rebound activity upon release from inhibition, whereas the resilient population does not have an ADP and is slower to fire after hyperpolarization. This rebound activity can trigger dopamine release in the striatum, an important component of basal ganglia function. Using whole-cell patch clamp electrophysiology on ex vivo slices from adult mice of both sexes, we find that muscarinic activation with the non-selective muscarinic agonist Oxotremorine inhibits rebound activity more strongly in vulnerable vs resilient SNc neurons. Here, we show that this effect depends on the direct activation of muscarinic receptors on the SNc dopaminergic neurons. Through a series of pharmacological and transgenic knock-out experiments, we tested whether the muscarinic inhibition of rebound was mediated through the canonical rebound-related ion channels: T-type calcium channels, hyperpolarization-activated cation channels (HCN), and A-type potassium channels. We find that muscarinic receptor activation inhibits HCN-mediated current (Ih) in vulnerable SNc neurons, but that Ih activity is not necessary for the muscarinic inhibition of rebound activity. Similarly, we find that Oxotremorine inhibits rebound activity independently of T-type calcium channels and A-type potassium channels. Together these findings reveal new principles governing acetylcholine and dopamine interactions, showing that muscarinic receptors directly affect SNc rebound activity in the midbrain at the somatodendritic level and differentially modify information processing in distinct SNc subpopulations.
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Affiliation(s)
- Megan L Beaver
- Department of Pharmacology & Physiology, Georgetown University Medical Center, Washington, DC, USA 20007
| | - Rebekah C Evans
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC, USA 20007
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Burré J, Edwards RH, Halliday G, Lang AE, Lashuel HA, Melki R, Murayama S, Outeiro TF, Papa SM, Stefanis L, Woerman AL, Surmeier DJ, Kalia LV, Takahashi R. Research Priorities on the Role of α-Synuclein in Parkinson's Disease Pathogenesis. Mov Disord 2024. [PMID: 38946200 DOI: 10.1002/mds.29897] [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: 01/05/2024] [Revised: 05/16/2024] [Accepted: 06/03/2024] [Indexed: 07/02/2024] Open
Abstract
Various forms of Parkinson's disease, including its common sporadic form, are characterized by prominent α-synuclein (αSyn) aggregation in affected brain regions. However, the role of αSyn in the pathogenesis and evolution of the disease remains unclear, despite vast research efforts of more than a quarter century. A better understanding of the role of αSyn, either primary or secondary, is critical for developing disease-modifying therapies. Previous attempts to hone this research have been challenged by experimental limitations, but recent technological advances may facilitate progress. The Scientific Issues Committee of the International Parkinson and Movement Disorder Society (MDS) charged a panel of experts in the field to discuss current scientific priorities and identify research strategies with potential for a breakthrough. © 2024 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Jacqueline Burré
- Appel Institute for Alzheimer's Disease Research and Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York, USA
| | - Robert H Edwards
- Department of Physiology and Neurology, University of California, San Francisco School of Medicine, San Francisco, California, USA
| | - Glenda Halliday
- Brain and Mind Centre, School of Medical Sciences, The University of Sydney, Camperdown, New South Wales, Australia
| | - Anthony E Lang
- Edmond J. Safra Program in Parkinson's Disease, Krembil Research Institute, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada
- Division of Neurology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Hilal A Lashuel
- Laboratory of Chemical Biology of Neurodegeneration, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Ronald Melki
- Institut Francois Jacob (MIRCen), CEA and Laboratory of Neurodegenerative Diseases, CNRS, Fontenay-Aux-Roses, France
| | - Shigeo Murayama
- Department of Neuropathology, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan
- The Brain Bank for Neurodevelopmental, Neurological and Psychiatric Disorders, United Graduate School of Child Development, Osaka University, Osaka, Japan
| | - Tiago F Outeiro
- Department of Experimental Neurodegeneration, University Medical Center, Göttingen, Germany
- Faculty of Medical Sciences, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Stella M Papa
- Department of Neurology, School of Medicine, and Emory National Primate Research Center, Emory University, Atlanta, Georgia, USA
| | - Leonidas Stefanis
- First Department of Neurology, Eginitio Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
- Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Amanda L Woerman
- Department of Biology, Institute for Applied Life Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, USA
- Department of Microbiology, Immunology, and Pathology, Prion Research Center, Colorado State University, Fort Collins, Colorado, USA
| | - Dalton James Surmeier
- Department of Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, Maryland, USA
| | - Lorraine V Kalia
- Edmond J. Safra Program in Parkinson's Disease, Krembil Research Institute, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada
- Division of Neurology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Ryosuke Takahashi
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Ryczko D. The Mesencephalic Locomotor Region: Multiple Cell Types, Multiple Behavioral Roles, and Multiple Implications for Disease. Neuroscientist 2024; 30:347-366. [PMID: 36575956 PMCID: PMC11107129 DOI: 10.1177/10738584221139136] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The mesencephalic locomotor region (MLR) controls locomotion in vertebrates. In humans with Parkinson disease, locomotor deficits are increasingly associated with decreased activity in the MLR. This brainstem region, commonly considered to include the cuneiform and pedunculopontine nuclei, has been explored as a target for deep brain stimulation to improve locomotor function, but the results are variable, from modest to promising. However, the MLR is a heterogeneous structure, and identification of the best cell type to target is only beginning. Here, I review the studies that uncovered the role of genetically defined MLR cell types, and I highlight the cells whose activation improves locomotor function in animal models of Parkinson disease. The promising cell types to activate comprise some glutamatergic neurons in the cuneiform and caudal pedunculopontine nuclei, as well as some cholinergic neurons of the pedunculopontine nucleus. Activation of MLR GABAergic neurons should be avoided, since they stop locomotion or evoke bouts flanked with numerous stops. MLR is also considered a potential target in spinal cord injury, supranuclear palsy, primary progressive freezing of gait, or stroke. Better targeting of the MLR cell types should be achieved through optimized deep brain stimulation protocols, pharmacotherapy, or the development of optogenetics for human use.
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Affiliation(s)
- Dimitri Ryczko
- Département de Pharmacologie-Physiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, Sherbrooke, Canada
- Centre de recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Canada
- Neurosciences Sherbrooke, Sherbrooke, Canada
- Institut de Pharmacologie de Sherbrooke, Sherbrooke, Canada
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4
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Chen RYT, Evans RC. Comparing tonic and phasic dendritic calcium in cholinergic pedunculopontine neurons and dopaminergic substantia nigra neurons. Eur J Neurosci 2024; 59:1638-1656. [PMID: 38383047 PMCID: PMC10987283 DOI: 10.1111/ejn.16281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 02/23/2024]
Abstract
Several brainstem nuclei degenerate in Parkinson's disease (PD). In addition to the well-characterized dopaminergic neurons of the substantia nigra pars compacta (SNc), the cholinergic neurons of the pedunculopontine nucleus (PPN) also degenerate in PD. One leading hypothesis of selective vulnerability is that pacemaking activity and the activation of low-threshold L-type calcium current are major contributors to tonic calcium load and cellular stress in SNc dopaminergic neurons. However, it is not yet clear whether the vulnerable PPN cholinergic neurons share this property. Therefore, we used two-photon dendritic calcium imaging and whole-cell electrophysiology to evaluate the role of L-type calcium channels in tonic and phasic dendritic calcium signals in PPN and SNc neurons. In addition, we investigated N- and P/Q-type calcium channel regulation of firing properties and dendritic calcium in PPN neurons. We found that blocking L-type channels reduces tonic firing rate and dendritic calcium levels in SNc neurons. By contrast, the tonic calcium load in PPN neurons did not depend on L-, N- or P/Q-type channels. However, we found that blocking either L-type (with nifedipine) or N- and P/Q-type (with omega-conotoxin MVIIC) channels reduces phasic calcium influx in PPN dendrites. Together, these findings show that L-type calcium channels play different roles in the activity of SNc and PPN neurons, and suggest that low-threshold L-type channels are not responsible for tonic calcium levels in PPN cholinergic neurons and are therefore not likely to be a source of selective vulnerability in these cells.
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Affiliation(s)
- Rita Yu-Tzu Chen
- Department of Neuroscience, Georgetown University Medical Center, Washington DC
| | - Rebekah C. Evans
- Department of Neuroscience, Georgetown University Medical Center, Washington DC
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Morgenstern NA, Esposito MS. The Basal Ganglia and Mesencephalic Locomotor Region Connectivity Matrix. Curr Neuropharmacol 2024; 22:1454-1472. [PMID: 37559244 PMCID: PMC11097982 DOI: 10.2174/1570159x21666230809112840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/16/2023] [Accepted: 02/23/2023] [Indexed: 08/11/2023] Open
Abstract
Although classically considered a relay station for basal ganglia (BG) output, the anatomy, connectivity, and function of the mesencephalic locomotor region (MLR) were redefined during the last two decades. In striking opposition to what was initially thought, MLR and BG are actually reciprocally and intimately interconnected. New viral-based, optogenetic, and mapping technologies revealed that cholinergic, glutamatergic, and GABAergic neurons coexist in this structure, which, in addition to extending descending projections, send long-range ascending fibers to the BG. These MLR projections to the BG convey motor and non-motor information to specific synaptic targets throughout different nuclei. Moreover, MLR efferent fibers originate from precise neuronal subpopulations located in particular MLR subregions, defining independent anatomo-functional subcircuits involved in particular aspects of animal behavior such as fast locomotion, explorative locomotion, posture, forelimb- related movements, speed, reinforcement, among others. In this review, we revised the literature produced during the last decade linking MLR and BG. We conclude that the classic framework considering the MLR as a homogeneous output structure passively receiving input from the BG needs to be revisited. We propose instead that the multiple subcircuits embedded in this region should be taken as independent entities that convey relevant and specific ascending information to the BG and, thus, actively participate in the execution and tuning of behavior.
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Affiliation(s)
- Nicolás A. Morgenstern
- Champalimaud Research, Champalimaud Foundation, Lisbon, Portugal
- Faculty of Medicine, University of Lisbon, Instituto De Medicina Molecular João Lobo Antunes, Lisbon, Portugal
| | - Maria S. Esposito
- Department of Medical Physics, Centro Atomico Bariloche, CNEA, CONICET, Av. Bustillo 9500, San Carlos de Bariloche, Rio Negro, Argentina
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Santin MDN, Tempier N, Belaid H, Zenoni M, Dumas S, Wallén-Mackenzie Å, Bardinet E, Destrieux C, François C, Karachi C. Anatomical characterisation of three different psychosurgical targets in the subthalamic area: from the basal ganglia to the limbic system. Brain Struct Funct 2023; 228:1977-1992. [PMID: 37668733 DOI: 10.1007/s00429-023-02691-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 07/24/2023] [Indexed: 09/06/2023]
Abstract
Effective neural stimulation for the treatment of severe psychiatric disorders needs accurate characterisation of surgical targets. This is especially true for the medial subthalamic region (MSR) which contains three targets: the anteromedial STN for obsessive compulsive disorder (OCD), the medial forebrain bundle (MFB) for depression and OCD, and the "Sano triangle" for pathological aggressiveness. Blocks containing the subthalamic area were obtained from two human brains. After obtaining 11.7-Tesla MRI, blocks were cut in regular sections for immunohistochemistry. Fluorescent in situ hybridisation was performed on the macaque MSR. Electron microscopic observation for synaptic specialisation was performed on human and macaque subthalamic fresh samples. Images of human brain sections were reconstructed in a cryoblock which was registered on the MRI and histological slices were then registered. The STN contains glutamatergic and fewer GABAergic neurons and has no strict boundary with the adjacent MSR. The anteromedial STN has abundant dopaminergic and serotoninergic innervation with very sparse dopaminergic neurons. The MFB is composed of dense anterior dopaminergic and posterior serotoninergic fibres, and fewer cholinergic and glutamatergic fibres. Medially, the Sano triangle presumably contains orexinergic terminals from the hypothalamus, and neurons with strong nuclear oestrogen receptor-alpha staining with a decreased anteroposterior and mediolateral gradient of staining. These findings provide new insight regarding MSR cells and their fibre specialisation, forming a transition zone between the basal ganglia and the limbic systems. Our 3D reconstruction enabled us to visualize the main histological features of the three targets which should enable better targeting and understanding of neuromodulatory stimulation results in severe psychiatric conditions.
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Affiliation(s)
- Marie des Neiges Santin
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute- ICM, Inserm, CNRS, APHP, Hôpital de la Pitié Salpêtrière, 75013, Paris, France
| | - Nicolas Tempier
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute- ICM, Inserm, CNRS, APHP, Hôpital de la Pitié Salpêtrière, 75013, Paris, France
| | - Hayat Belaid
- Service de Neurochirurgie, Hôpital Fondation Adolphe de Rothschild, 29 rue Manin, Paris, France
| | - Matthieu Zenoni
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute- ICM, Inserm, CNRS, APHP, Hôpital de la Pitié Salpêtrière, 75013, Paris, France
| | | | - Åsa Wallén-Mackenzie
- Department of Organismal Biology, Unit of Comparative Physiology, Uppsala University, S-756 32, Uppsala, Sweden
| | - Eric Bardinet
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute- ICM, Inserm, CNRS, APHP, Hôpital de la Pitié Salpêtrière, 75013, Paris, France
| | - Christophe Destrieux
- UMR Inserm U1253, IBrain, Université de Tours, Tours, France
- Laboratoire d'Anatomie, Faculté de Médecine, Université François Rabelais, Tours, France
| | - Chantal François
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute- ICM, Inserm, CNRS, APHP, Hôpital de la Pitié Salpêtrière, 75013, Paris, France
| | - Carine Karachi
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute- ICM, Inserm, CNRS, APHP, Hôpital de la Pitié Salpêtrière, 75013, Paris, France.
- AP-HP, Hôpital de la Pitié-Salpêtrière, Service de Neurochirurgie, Paris, France.
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7
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Chen RYT, Evans RC. Comparing tonic and phasic calcium in the dendrites of vulnerable midbrain neurons. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.28.555184. [PMID: 37693427 PMCID: PMC10491175 DOI: 10.1101/2023.08.28.555184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Several midbrain nuclei degenerate in Parkinson's Disease (PD). Many of these nuclei share the common characteristics that are thought to contribute to their selective vulnerability, including pacemaking activity and high levels of calcium influx. In addition to the well-characterized dopaminergic neurons of the substantia nigra pars compacta (SNc), the cholinergic neurons of the pedunculopontine nucleus (PPN) also degenerate in PD. It is well established that the low-threshold L-type calcium current is a main contributor to tonic calcium in SNc dopaminergic neurons and is hypothesized to contribute to their selective vulnerability. However, it is not yet clear whether the vulnerable PPN cholinergic neurons share this property. Therefore, we used two-photon dendritic calcium imaging and whole-cell electrophysiology to evaluate the role of L-type calcium channels in the tonic and phasic activity of PPN neurons and the corresponding dendritic calcium signal and directly compare these characteristics to SNc neurons. We found that blocking L-type channels reduces tonic firing rate and dendritic calcium levels in SNc neurons. By contrast, the calcium load in PPN neurons during pacemaking did not depend on L-type channels. However, we find that blocking L-type channels reduces phasic calcium influx in PPN dendrites. Together, these findings show that L-type calcium channels play different roles in the activity of SNc and PPN neurons, and suggest that low-threshold L-type channels are not responsible for tonic calcium levels in PPN cholinergic neurons and are therefore not likely to be a source of selective vulnerability in these cells.
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Affiliation(s)
- Rita Yu-Tzu Chen
- Department of Neuroscience, Georgetown University Medical Center, Washington DC
| | - Rebekah C. Evans
- Department of Neuroscience, Georgetown University Medical Center, Washington DC
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Wu J, Li Y, Huang Y, Liu L, Zhang H, Nagy C, Tan X, Cheng K, Liu Y, Pu J, Wang H, Wu Q, Perry SW, Turecki G, Wong ML, Licinio J, Zheng P, Xie P. Integrating spatial and single-nucleus transcriptomic data elucidates microglial-specific responses in female cynomolgus macaques with depressive-like behaviors. Nat Neurosci 2023; 26:1352-1364. [PMID: 37443281 DOI: 10.1038/s41593-023-01379-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 06/12/2023] [Indexed: 07/15/2023]
Abstract
Major depressive disorder represents a serious public health challenge worldwide; however, the underlying cellular and molecular mechanisms are mostly unknown. Here, we profile the dorsolateral prefrontal cortex of female cynomolgus macaques with social stress-associated depressive-like behaviors using single-nucleus RNA-sequencing and spatial transcriptomics. We find gene expression changes associated with depressive-like behaviors mostly in microglia, and we report a pro-inflammatory microglia subpopulation enriched in the depressive-like condition. Single-nucleus RNA-sequencing data result in the identification of six enriched gene modules associated with depressive-like behaviors, and these modules are further resolved by spatial transcriptomics. Gene modules associated with huddle and sit alone behaviors are expressed in neurons and oligodendrocytes of the superficial cortical layer, while gene modules associated with locomotion and amicable behaviors are enriched in microglia and astrocytes in mid-to-deep cortical layers. The depressive-like behavior associated microglia subpopulation is enriched in deep cortical layers. In summary, our findings show cell-type and cortical layer-specific gene expression changes and identify one microglia subpopulation associated with depressive-like behaviors in female non-human primates.
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Affiliation(s)
- Jing Wu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Jinfeng Laboratory, Chongqing, China
| | - Yifan Li
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Jinfeng Laboratory, Chongqing, China
| | - Yu Huang
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Jinfeng Laboratory, Chongqing, China
| | - Lanxiang Liu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Jinfeng Laboratory, Chongqing, China
- Department of Neurology, Yongchuan Hospital of Chongqing Medical University, Chongqing, China
| | - Hanping Zhang
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Jinfeng Laboratory, Chongqing, China
| | - Corina Nagy
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, Montreal, Quebec, Canada
| | - Xunmin Tan
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Jinfeng Laboratory, Chongqing, China
| | - Ke Cheng
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yiyun Liu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Jinfeng Laboratory, Chongqing, China
| | - Juncai Pu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Haiyang Wang
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Jinfeng Laboratory, Chongqing, China
| | - Qingyuan Wu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Neurology, Chongqing University Three Gorges Hospital, Chongqing, China
| | - Seth W Perry
- Department of Psychiatry, College of Medicine, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Gustavo Turecki
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, Montreal, Quebec, Canada
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - Ma-Li Wong
- Department of Psychiatry, College of Medicine, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Julio Licinio
- Department of Psychiatry, College of Medicine, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Peng Zheng
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
- Jinfeng Laboratory, Chongqing, China.
| | - Peng Xie
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
- Jinfeng Laboratory, Chongqing, China.
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9
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Welter ML, Vasseur A, Edragas R, Chaumont H, Pineau F, Mangone G, Olivier C, Leber I, Rivaud-Pechoux S, Lehericy S, Gallea C, Yahia-Cherif L, Lannuzel A. Brain dysfunction in gait disorders of Caribbean atypical Parkinsonism and progressive supranuclear palsy patients: A comparative study. Neuroimage Clin 2023; 38:103443. [PMID: 37247501 PMCID: PMC10236465 DOI: 10.1016/j.nicl.2023.103443] [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: 03/14/2023] [Revised: 05/19/2023] [Accepted: 05/21/2023] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Gait disorders and falls occur early in progressive supranuclear palsy (PSP-RS) and Caribbean atypical parkinsonism (Caribbean AP). However, the link between these signs and brain lesions has never been explored in these patient populations. Here, we investigate and compare the imaging factors that relate to gait and balance disorders in Caribbean AP and PSP-RS patients. METHODS We assessed gait and balance using clinical scales and gait recordings in 16 Caribbean AP and 15 PSP-RS patients and 17 age-matched controls. We measured the grey and white matter brain volumes on 3 T brain MRI images. We performed a principal component analysis (PCA) including all the data to determine differences and similarities between groups, and explore the relationship between gait disorders and brain volumes. RESULTS Both Caribbean AP patients and PSP-RS have marked gait and balance disorders with similar severity. In both groups, gait and balance disorders were found to be most strongly related to structural changes in the lateral cerebellum, caudate nucleus, and fronto-parietal areas. In Caribbean AP patients, gait disorders were also related to additional changes in the cortex, including frontal, insular, temporal and cuneus lobes, whereas in PSP-RS patients, additional white matter changes involved the mesencephalon and parahippocampal gyrus. CONCLUSION Gait and balance disorders in Caribbean AP patients are mainly related to dysfunction of cortical brain areas involved in visuo-sensorimotor processing and self-awareness, whereas these signs mainly result from premotor-brainstem-cerebellar network dysfunction in PSP-RS patients, brain areas involved in initiation and maintenance of locomotor pattern and postural adaptation.
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Affiliation(s)
- Marie-Laure Welter
- Neurophysiology Department, Rouen University Hospital, Université de Normandie, Rouen, France; INSERM 1127, Sorbonne Universités, Université Pierre et Marie Curie-Paris Université, Paris 06, Unité Mixte de Recherche (UMR) S1127, Centre National de la Recherche Scientifique (CNRS), UMR 7225, Paris Brain Institute, Paris, France; Plateforme d'analyse du mouvement (PANAM), Paris Brain Institute, Paris, France.
| | - Alexandre Vasseur
- Neurophysiology Department, Rouen University Hospital, Université de Normandie, Rouen, France
| | - Regine Edragas
- Rehabilitation Department, University Hospital of Martinique, F.W.I, France
| | - Hugo Chaumont
- INSERM 1127, Sorbonne Universités, Université Pierre et Marie Curie-Paris Université, Paris 06, Unité Mixte de Recherche (UMR) S1127, Centre National de la Recherche Scientifique (CNRS), UMR 7225, Paris Brain Institute, Paris, France; Neurology Department, Clinical Investigation Centre 1424, University Hospital of Guadeloupe, Université des Antilles, Pointe-à-Pitre, Guadeloupe, F.W.I, France
| | - Fanny Pineau
- Clinical Investigation Centre, Paris Brain Institute, Pitié-Salpêtrière Hospital, Paris, France
| | - Graziella Mangone
- Clinical Investigation Centre, Paris Brain Institute, Pitié-Salpêtrière Hospital, Paris, France
| | - Claire Olivier
- INSERM 1127, Sorbonne Universités, Université Pierre et Marie Curie-Paris Université, Paris 06, Unité Mixte de Recherche (UMR) S1127, Centre National de la Recherche Scientifique (CNRS), UMR 7225, Paris Brain Institute, Paris, France; Plateforme d'analyse du mouvement (PANAM), Paris Brain Institute, Paris, France
| | - Isabelle Leber
- INSERM 1127, Sorbonne Universités, Université Pierre et Marie Curie-Paris Université, Paris 06, Unité Mixte de Recherche (UMR) S1127, Centre National de la Recherche Scientifique (CNRS), UMR 7225, Paris Brain Institute, Paris, France
| | - Sophie Rivaud-Pechoux
- INSERM 1127, Sorbonne Universités, Université Pierre et Marie Curie-Paris Université, Paris 06, Unité Mixte de Recherche (UMR) S1127, Centre National de la Recherche Scientifique (CNRS), UMR 7225, Paris Brain Institute, Paris, France
| | - Stéphane Lehericy
- INSERM 1127, Sorbonne Universités, Université Pierre et Marie Curie-Paris Université, Paris 06, Unité Mixte de Recherche (UMR) S1127, Centre National de la Recherche Scientifique (CNRS), UMR 7225, Paris Brain Institute, Paris, France; CENIR, Paris Brain Institute, Paris, France
| | - Cecile Gallea
- INSERM 1127, Sorbonne Universités, Université Pierre et Marie Curie-Paris Université, Paris 06, Unité Mixte de Recherche (UMR) S1127, Centre National de la Recherche Scientifique (CNRS), UMR 7225, Paris Brain Institute, Paris, France; CENIR, Paris Brain Institute, Paris, France
| | - Lydia Yahia-Cherif
- INSERM 1127, Sorbonne Universités, Université Pierre et Marie Curie-Paris Université, Paris 06, Unité Mixte de Recherche (UMR) S1127, Centre National de la Recherche Scientifique (CNRS), UMR 7225, Paris Brain Institute, Paris, France; CENIR, Paris Brain Institute, Paris, France
| | - Annie Lannuzel
- INSERM 1127, Sorbonne Universités, Université Pierre et Marie Curie-Paris Université, Paris 06, Unité Mixte de Recherche (UMR) S1127, Centre National de la Recherche Scientifique (CNRS), UMR 7225, Paris Brain Institute, Paris, France; Neurology Department, Clinical Investigation Centre 1424, University Hospital of Guadeloupe, Université des Antilles, Pointe-à-Pitre, Guadeloupe, F.W.I, France
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10
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Hérent C, Diem S, Usseglio G, Fortin G, Bouvier J. Upregulation of breathing rate during running exercise by central locomotor circuits in mice. Nat Commun 2023; 14:2939. [PMID: 37217517 DOI: 10.1038/s41467-023-38583-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 05/02/2023] [Indexed: 05/24/2023] Open
Abstract
While respiratory adaptation to exercise is compulsory to cope with the increased metabolic demand, the neural signals at stake remain poorly identified. Using neural circuit tracing and activity interference strategies in mice, we uncover here two systems by which the central locomotor network can enable respiratory augmentation in relation to running activity. One originates in the mesencephalic locomotor region (MLR), a conserved locomotor controller. Through direct projections onto the neurons of the preBötzinger complex that generate the inspiratory rhythm, the MLR can trigger a moderate increase of respiratory frequency, prior to, or even in the absence of, locomotion. The other is the lumbar enlargement of the spinal cord containing the hindlimb motor circuits. When activated, and through projections onto the retrotrapezoid nucleus (RTN), it also potently upregulates breathing rate. On top of identifying critical underpinnings for respiratory hyperpnea, these data also expand the functional implication of cell types and pathways that are typically regarded as "locomotor" or "respiratory" related.
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Affiliation(s)
- Coralie Hérent
- Université Paris-Saclay, CNRS, Institut des Neurosciences Paris-Saclay, 91400, Saclay, France
- Champalimaud Research, Champalimaud Foundation, 1400-038, Lisbon, Portugal
| | - Séverine Diem
- Université Paris-Saclay, CNRS, Institut des Neurosciences Paris-Saclay, 91400, Saclay, France
- Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, 34094, Montpellier, France
| | - Giovanni Usseglio
- Université Paris-Saclay, CNRS, Institut des Neurosciences Paris-Saclay, 91400, Saclay, France
| | - Gilles Fortin
- Institut de Biologie de l'École Normale Supérieure (IBENS), École Normale Supérieure, CNRS, INSERM, PSL Research University, 75005, Paris, France
| | - Julien Bouvier
- Université Paris-Saclay, CNRS, Institut des Neurosciences Paris-Saclay, 91400, Saclay, France.
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11
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Increased Expression of Alpha-, Beta-, and Gamma-Synucleins in Brainstem Regions of a Non-Human Primate Model of Parkinson’s Disease. Int J Mol Sci 2022; 23:ijms23158586. [PMID: 35955716 PMCID: PMC9369189 DOI: 10.3390/ijms23158586] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 07/28/2022] [Accepted: 07/29/2022] [Indexed: 12/02/2022] Open
Abstract
Parkinson’s disease (PD) is characterized by cell loss in the substantia nigra and the presence of alpha-synuclein (α-syn)-containing neuronal Lewy bodies. While α-syn has received major interest in the pathogenesis of PD, the function of beta- and gamma-synucleins (β-syn and γ-syn, respectively) is not really known. Yet, these proteins are members of the same family and also concentrated in neuronal terminals. The current preclinical study investigated the expression levels of α-, β-, and γ-synucleins in brainstem regions involved in PD physiopathology. We analyzed synuclein expression in the substantia nigra, raphe nuclei, pedunculopontine nucleus, and locus coeruleus from control and parkinsonian (by MPTP) macaques. MPTP-intoxicated monkeys developed a more or less severe parkinsonian score and were sacrificed after a variable post-MPTP period ranging from 1 to 20 months. The expression of the three synucleins was increased in the substantia nigra after MPTP, and this increase correlates positively, although not very strongly, with cell loss and motor score and not with the time elapsed after intoxication. In the dorsal raphe nucleus, the expression of the three synucleins was also increased, but only α- and γ-Syn are linked to the motor score and associated cell loss. Finally, although no change in synuclein expression was demonstrated in the locus coeruleus after MPTP, we found increased expression levels of γ-Syn, which are only correlated with cell loss in the pedunculopontine nucleus. Altogether, our data suggest that these proteins may play a key role in brainstem regions and mesencephalic tegmentum. Given the involvement of these brain regions in non-motor symptoms of PD, these data also strengthen the relevance of the MPTP macaque model of PD, which exhibits pathological changes beyond nigral DA cell loss and α-synucleinopathy.
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12
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Joza S, Camicioli R, Martin WRW, Wieler M, Gee M, Ba F. Pedunculopontine Nucleus Dysconnectivity Correlates With Gait Impairment in Parkinson’s Disease: An Exploratory Study. Front Aging Neurosci 2022; 14:874692. [PMID: 35875799 PMCID: PMC9304714 DOI: 10.3389/fnagi.2022.874692] [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: 02/12/2022] [Accepted: 06/20/2022] [Indexed: 11/25/2022] Open
Abstract
Background Gait impairment is a debilitating and progressive feature of Parkinson’s disease (PD). Increasing evidence suggests that gait control is partly mediated by cholinergic signaling from the pedunculopontine nucleus (PPN). Objective We investigated whether PPN structural connectivity correlated with quantitative gait measures in PD. Methods Twenty PD patients and 15 controls underwent diffusion tensor imaging to quantify structural connectivity of the PPN. Whole brain analysis using tract-based spatial statistics and probabilistic tractography were performed using the PPN as a seed region of interest for cortical and subcortical target structures. Gait metrics were recorded in subjects’ medication ON and OFF states, and were used to determine if specific features of gait dysfunction in PD were related to PPN structural connectivity. Results Tract-based spatial statistics revealed reduced structural connectivity involving the corpus callosum and right superior corona radiata, but did not correlate with gait measures. Abnormalities in PPN structural connectivity in PD were lateralized to the right hemisphere, with pathways involving the right caudate nucleus, amygdala, pre-supplementary motor area, and primary somatosensory cortex. Altered connectivity of the right PPN-caudate nucleus was associated with worsened cadence, stride time, and velocity while in the ON state; altered connectivity of the right PPN-amygdala was associated with reduced stride length in the OFF state. Conclusion Our exploratory analysis detects a potential correlation between gait dysfunction in PD and a characteristic pattern of connectivity deficits in the PPN network involving the right caudate nucleus and amygdala, which may be investigated in future larger studies.
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Affiliation(s)
- Stephen Joza
- Division of Neurology, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - Richard Camicioli
- Division of Neurology, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | | | - Marguerite Wieler
- Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada
| | - Myrlene Gee
- Division of Neurology, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - Fang Ba
- Division of Neurology, Department of Medicine, University of Alberta, Edmonton, AB, Canada
- *Correspondence: Fang Ba,
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13
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Motor and non-motor circuit disturbances in early Parkinson disease: which happens first? Nat Rev Neurosci 2022; 23:115-128. [PMID: 34907352 DOI: 10.1038/s41583-021-00542-9] [Citation(s) in RCA: 85] [Impact Index Per Article: 42.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/12/2021] [Indexed: 12/15/2022]
Abstract
For the last two decades, pathogenic concepts in Parkinson disease (PD) have revolved around the toxicity and spread of α-synuclein. Thus, α-synuclein would follow caudo-rostral propagation from the periphery to the central nervous system, first producing non-motor manifestations (such as constipation, sleep disorders and hyposmia), and subsequently impinging upon the mesencephalon to account for the cardinal motor features before reaching the neocortex as the disease evolves towards dementia. This model is the prevailing theory of the principal neurobiological mechanism of disease. Here, we scrutinize the temporal evolution of motor and non-motor manifestations in PD and suggest that, even though the postulated bottom-up mechanisms are likely to be involved, early involvement of the nigrostriatal system is a key and prominent pathophysiological mechanism. Upcoming studies of detailed clinical manifestations with newer neuroimaging techniques will allow us to more closely define, in vivo, the role of α-synuclein aggregates with respect to neuronal loss during the onset and progression of PD.
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14
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Noga BR, Guest JD. Combined neuromodulatory approaches in the central nervous system for treatment of spinal cord injury. Curr Opin Neurol 2021; 34:804-811. [PMID: 34593718 PMCID: PMC8595808 DOI: 10.1097/wco.0000000000000999] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE OF REVIEW To report progress in neuromodulation following spinal cord injury (SCI) using combined brain and spinal neuromodulation.Neuromodulation refers to alterations in neuronal activity for therapeutic purposes. Beneficial effects are established in disease states such as Parkinson's Disease (PD), chronic pain, epilepsy, and SCI. The repertoire of neuromodulation and bioelectric medicine is rapidly expanding. After SCI, cohort studies have reported the benefits of epidural stimulation (ES) combined with training. Recently, we have explored combining ES with deep brain stimulation (DBS) to increase activation of descending motor systems to address limitations of ES in severe SCI. In this review, we describe the types of applied neuromodulation that could be combined in SCI to amplify efficacy to enable movement. These include ES, mesencephalic locomotor region (MLR) - DBS, noninvasive transcutaneous stimulation, transcranial magnetic stimulation, paired-pulse paradigms, and neuromodulatory drugs. We examine immediate and longer-term effects and what is known about: (1) induced neuroplastic changes, (2) potential safety concerns; (3) relevant outcome measures; (4) optimization of stimulation; (5) therapeutic limitations and prospects to overcome these. RECENT FINDINGS DBS of the mesencephalic locomotor region is emerging as a potential clinical target to amplify supraspinal command circuits for locomotion. SUMMARY Combinations of neuromodulatory methods may have additive value for restoration of function after spinal cord injury.
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Affiliation(s)
- Brian R Noga
- The Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
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15
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Bourilhon J, Olivier C, You H, Collomb-Clerc A, Grabli D, Belaid H, Mullie Y, François C, Czernecki V, Lau B, Pérez-García F, Bardinet E, Fernandez-Vidal S, Karachi C, Welter ML. Pedunculopontine and Cuneiform Nuclei Deep Brain Stimulation for Severe Gait and Balance Disorders in Parkinson's Disease: Interim Results from a Randomised Double-Blind Clinical Trial. JOURNAL OF PARKINSONS DISEASE 2021; 12:639-653. [PMID: 34744048 DOI: 10.3233/jpd-212793] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Dopa-resistant freezing of gait (FOG) and falls represent the dominant motor disabilities in advanced Parkinson's disease (PD). OBJECTIVE We investigate the effects of deep brain stimulation (DBS) of the mesencephalic locomotor region (MLR), comprised of the pedunculopontine (PPN) and cuneiform (CuN) nuclei, for treating gait and balance disorders, in a randomized double-blind cross-over trial. METHODS Six PD patients with dopa-resistant FOG and/or falls were operated for MLR-DBS. Patients received three DBS conditions, PPN, CuN, or sham, in a randomized order for 2-months each, followed by an open-label phase. The primary outcome was the change in anteroposterior anticipatory-postural-adjustments (APAs) during gait initiation on a force platformResults:The anteroposterior APAs were not significantly different between the DBS conditions (median displacement [1st-3rd quartile] of 3.07 [3.12-4.62] cm with sham-DBS, 1.95 [2.29-3.85] cm with PPN-DBS and 2.78 [1.66-4.04] cm with CuN-DBS; p = 0.25). Step length and velocity were significantly higher with CuN-DBS vs. both sham-DBS and PPN-DBS. Conversely, step length and velocity were lower with PPN-DBS vs. sham-DBS, with greater double stance and gait initiation durations. One year after surgery, step length was significantly lower with PPN-DBS vs. inclusion. We did not find any significant change in clinical scales between DBS conditions or one year after surgery. CONCLUSION Two months of PPN-DBS or CuN-DBS does not effectively improve clinically dopa-resistant gait and balance disorders in PD patients.
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Affiliation(s)
- Julie Bourilhon
- Department of Neurophysiology, Rouen UniversityHospital and University of Rouen, France.,Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France
| | - Claire Olivier
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France.,PANAM platform, Institut du Cerveau et de la Moelle É14 pinière (ICM), Paris, France
| | - Hana You
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France.,Clinical Investigation Center, Pitié-Salpêtrière, Charles Foix University Hospital, Assistance Publique-Hôpitaux de Paris, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France
| | - Antoine Collomb-Clerc
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France
| | - David Grabli
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France.,Fédération des Maladies du Système Nerveux, Pitié-Salpêtrière, Charles Foix University Hospital, Assistance Publique-Hôpitaux de Paris Paris, Paris, France
| | - Hayat Belaid
- Department of Neurosurgery, Pitié-Salpêtrière, Charles Foix University Hospital, Assistance Publique-Hôpitaux Paris, Paris, France
| | - Yannick Mullie
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France
| | - Chantal François
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France
| | - Virginie Czernecki
- Fédération des Maladies du Système Nerveux, Pitié-Salpêtrière, Charles Foix University Hospital, Assistance Publique-Hôpitaux de Paris Paris, Paris, France
| | - Brian Lau
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France
| | - Fernando Pérez-García
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France.,CENIR Platform, Institut du Cerveau et de la Moelle É22 pinière (ICM), Paris, France
| | - Eric Bardinet
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France.,CENIR Platform, Institut du Cerveau et de la Moelle É22 pinière (ICM), Paris, France
| | - Sara Fernandez-Vidal
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France.,STIM Platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France
| | - Carine Karachi
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France.,Department of Neurosurgery, Pitié-Salpêtrière, Charles Foix University Hospital, Assistance Publique-Hôpitaux Paris, Paris, France
| | - Marie-Laure Welter
- Department of Neurophysiology, Rouen UniversityHospital and University of Rouen, France.,Sorbonne Universités, UPMC Univ Paris 06, CNRS, INSERM, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France PANAM platform, Institut du Cerveau et de la Moelle Épinière (ICM), Paris, France
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16
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Optogenetic stimulation of glutamatergic neurons in the cuneiform nucleus controls locomotion in a mouse model of Parkinson's disease. Proc Natl Acad Sci U S A 2021; 118:2110934118. [PMID: 34670837 DOI: 10.1073/pnas.2110934118] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2021] [Indexed: 01/22/2023] Open
Abstract
In Parkinson's disease (PD), the loss of midbrain dopaminergic cells results in severe locomotor deficits, such as gait freezing and akinesia. Growing evidence indicates that these deficits can be attributed to the decreased activity in the mesencephalic locomotor region (MLR), a brainstem region controlling locomotion. Clinicians are exploring the deep brain stimulation of the MLR as a treatment option to improve locomotor function. The results are variable, from modest to promising. However, within the MLR, clinicians have targeted the pedunculopontine nucleus exclusively, while leaving the cuneiform nucleus unexplored. To our knowledge, the effects of cuneiform nucleus stimulation have never been determined in parkinsonian conditions in any animal model. Here, we addressed this issue in a mouse model of PD, based on the bilateral striatal injection of 6-hydroxydopamine, which damaged the nigrostriatal pathway and decreased locomotor activity. We show that selective optogenetic stimulation of glutamatergic neurons in the cuneiform nucleus in mice expressing channelrhodopsin in a Cre-dependent manner in Vglut2-positive neurons (Vglut2-ChR2-EYFP mice) increased the number of locomotor initiations, increased the time spent in locomotion, and controlled locomotor speed. Using deep learning-based movement analysis, we found that the limb kinematics of optogenetic-evoked locomotion in pathological conditions were largely similar to those recorded in intact animals. Our work identifies the glutamatergic neurons of the cuneiform nucleus as a potentially clinically relevant target to improve locomotor activity in parkinsonian conditions. Our study should open avenues to develop the targeted stimulation of these neurons using deep brain stimulation, pharmacotherapy, or optogenetics.
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17
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Bayasgalan T, Stupniki S, Kovács A, Csemer A, Szentesi P, Pocsai K, Dionisio L, Spitzmaul G, Pál B. Alteration of Mesopontine Cholinergic Function by the Lack of KCNQ4 Subunit. Front Cell Neurosci 2021; 15:707789. [PMID: 34381336 PMCID: PMC8352570 DOI: 10.3389/fncel.2021.707789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 06/28/2021] [Indexed: 11/16/2022] Open
Abstract
The pedunculopontine nucleus (PPN), a structure known as a cholinergic member of the reticular activating system (RAS), is source and target of cholinergic neuromodulation and contributes to the regulation of the sleep–wakefulness cycle. The M-current is a voltage-gated potassium current modulated mainly by cholinergic signaling. KCNQ subunits ensemble into ion channels responsible for the M-current. In the central nervous system, KCNQ4 expression is restricted to certain brainstem structures such as the RAS nuclei. Here, we investigated the presence and functional significance of KCNQ4 in the PPN by behavioral studies and the gene and protein expressions and slice electrophysiology using a mouse model lacking KCNQ4 expression. We found that this mouse has alterations in the adaptation to changes in light–darkness cycles, representing the potential role of KCNQ4 in the regulation of the sleep–wakefulness cycle. As cholinergic neurons from the PPN participate in the regulation of this cycle, we investigated whether the cholinergic PPN might also possess functional KCNQ4 subunits. Although the M-current is an electrophysiological hallmark of cholinergic neurons, only a subpopulation of them had KCNQ4-dependent M-current. Interestingly, the absence of the KCNQ4 subunit altered the expression patterns of the other KCNQ subunits in the PPN. We also determined that, in wild-type animals, the cholinergic inputs of the PPN modulated the M-current, and these in turn can modulate the level of synchronization between neighboring PPN neurons. Taken together, the KCNQ4 subunit is present in a subpopulation of PPN cholinergic neurons, and it may contribute to the regulation of the sleep–wakefulness cycle.
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Affiliation(s)
- T Bayasgalan
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - S Stupniki
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional Del Sur (UNS), Bahía Blanca, Argentina.,Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - A Kovács
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - A Csemer
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - P Szentesi
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - K Pocsai
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - L Dionisio
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional Del Sur (UNS), Bahía Blanca, Argentina.,Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - G Spitzmaul
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional Del Sur (UNS), Bahía Blanca, Argentina.,Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - B Pál
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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18
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Wolke R, Kuhtz-Buschbeck JP, Deuschl G, Margraf NG. Insufficiency of trunk extension and impaired control of muscle force in Parkinson's disease with camptocormia. Clin Neurophysiol 2020; 131:2621-2629. [PMID: 32932021 DOI: 10.1016/j.clinph.2020.07.019] [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: 02/26/2020] [Revised: 07/04/2020] [Accepted: 07/12/2020] [Indexed: 01/03/2023]
Abstract
OBJECTIVE To examine the aetiology of parkinsonian camptocormia, a non-fixed pathological forward bending of the trunk, by measuring trunk muscle activation and force regulation in Parkinson patients with (PD + CC) and without (PD) camptocormia matched for disease severity, and in age- and sex-matched healthy controls (HC). METHODS The isometric forces of trunk extension and flexion were measured in PD + CC, PD and HC. Neuromuscular efficiency (increase of extension force per increase of paravertebral muscle surface electromyography signal) and the ability to maintain a constant submaximal trunk extension force were examined. RESULTS Peak trunk extension force was significantly lower in PD + CC and PD than in HC, with PD + CC non-significantly weaker than PD. Compared with HC and with PD, the neuromuscular efficiency of trunk extension was significantly reduced in PD + CC. The variability of the force output (coefficient of variation) was significantly larger for PD + CC than for HC or PD. CONCLUSION The reduced neuromuscular efficiency of trunk extension separates PD + CC from PD. Moreover, control of the trunk extensor force is impaired in PD + CC. SIGNIFICANCE There is weakness and a force control deficit in parkinsonian camptocormia suggesting a disturbed sensory-motor integration, which may contribute to myopathic changes in the trunk extensor muscles.
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Affiliation(s)
- R Wolke
- Department of Neurology, Kiel University, UKSH, Germany
| | | | - G Deuschl
- Department of Neurology, Kiel University, UKSH, Germany.
| | - N G Margraf
- Department of Neurology, Kiel University, UKSH, Germany
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19
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Chang SJ, Cajigas I, Opris I, Guest JD, Noga BR. Dissecting Brainstem Locomotor Circuits: Converging Evidence for Cuneiform Nucleus Stimulation. Front Syst Neurosci 2020; 14:64. [PMID: 32973468 PMCID: PMC7473103 DOI: 10.3389/fnsys.2020.00064] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/03/2020] [Indexed: 01/06/2023] Open
Abstract
There are a pressing and unmet need for effective therapies for freezing of gait (FOG) and other neurological gait disorders. Deep brain stimulation (DBS) of a midbrain target known as the pedunculopontine nucleus (PPN) was proposed as a potential treatment based on its postulated involvement in locomotor control as part of the mesencephalic locomotor region (MLR). However, DBS trials fell short of expectations, leading many clinicians to abandon this strategy. Here, we discuss the potential reasons for this failure and review recent clinical data along with preclinical optogenetics evidence to argue that another nearby nucleus, the cuneiform nucleus (CnF), may be a superior target.
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Affiliation(s)
- Stephano J. Chang
- Neuroscience Graduate Program, University of Miami Miller School of Medicine, Miami, FL, United States
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL, United States
- Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Iahn Cajigas
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Ioan Opris
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL, United States
| | - James D. Guest
- Neuroscience Graduate Program, University of Miami Miller School of Medicine, Miami, FL, United States
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Brian R. Noga
- Neuroscience Graduate Program, University of Miami Miller School of Medicine, Miami, FL, United States
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL, United States
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Gay M, Belaid H, Rogers A, Pérez-García F, Roustan M, Bardinet E, François C, Karachi C. Anatomo-Functional Mapping of the Primate Mesencephalic Locomotor Region Using Stereotactic Lesions. Mov Disord 2020; 35:789-799. [PMID: 31922282 DOI: 10.1002/mds.27983] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/24/2019] [Accepted: 12/27/2019] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Dysfunction of the mesencephalic locomotor region has been implicated in gait disorders. However, the role of its 2 components, the pedunculopontine and the cuneiform nuclei, in locomotion is poorly understood in primates. OBJECTIVES To analyze the effect of cuneiform lesions on gait and balance in 2 monkeys and to compare them with those obtained after cholinergic pedunculopontine lesions in 4 monkeys and after lesions in both the cuneiform and pedunculopontine nuclei in 1 monkey. METHODS After each stereotactic lesion, we performed a neurological examination and gait and balance assessments with kinematic measures during a locomotor task. The 3-dimensional location of each lesion was analyzed on a common brainstem space. RESULTS After each cuneiform lesion, we observed a contralateral cervical dystonia including an increased tone in the proximal forelimb and an increase in knee angle, back curvature and walking speed. Conversely, cholinergic pedunculopontine lesions increased tail rigidity and back curvature and an imbalance of the muscle tone between the ipsi- and contralateral hindlimb with decreased knee angles. The walking speed was decreased. Moreover, pedunculopontine lesions often resulted in a longer time to waking postsurgery. CONCLUSIONS The location of the lesions and their behavioral effects revealed a somatotopic organization of muscle tone control, with the neck and forelimb represented within the cuneiform nucleus and hindlimb and tail represented within the pedunculopontine nucleus. Cuneiform lesions increased speed, whereas pedunculopontine lesions decreased it. These findings confirm the complex and specific role of the cuneiform and pedunculopontine nuclei in locomotion and suggest the role of the pedunculopontine in sleep control. © 2020 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Marion Gay
- Sorbonne University, Univ. Pierre & Marie Curie Paris 06, CNRS, INSERM, APHP GH Pitié-Salpêtrière, Institut du cerveau et de la moelle épinière, Paris, France
| | - Hayat Belaid
- Sorbonne University, Univ. Pierre & Marie Curie Paris 06, CNRS, INSERM, APHP GH Pitié-Salpêtrière, Institut du cerveau et de la moelle épinière, Paris, France.,Department of Neurosurgery, Rothschild Foundation, Paris, France
| | - Alister Rogers
- Sorbonne University, Univ. Pierre & Marie Curie Paris 06, CNRS, INSERM, APHP GH Pitié-Salpêtrière, Institut du cerveau et de la moelle épinière, Paris, France.,Department of Neurosurgery, Rothschild Foundation, Paris, France
| | - Fernando Pérez-García
- Sorbonne University, Univ. Pierre & Marie Curie Paris 06, CNRS, INSERM, APHP GH Pitié-Salpêtrière, Institut du cerveau et de la moelle épinière, Paris, France.,Center of NeuroImaging Research-CENIR, Paris, France
| | - Maxime Roustan
- Sorbonne University, Univ. Pierre & Marie Curie Paris 06, CNRS, INSERM, APHP GH Pitié-Salpêtrière, Institut du cerveau et de la moelle épinière, Paris, France
| | - Eric Bardinet
- Sorbonne University, Univ. Pierre & Marie Curie Paris 06, CNRS, INSERM, APHP GH Pitié-Salpêtrière, Institut du cerveau et de la moelle épinière, Paris, France.,Center of NeuroImaging Research-CENIR, Paris, France
| | - Chantal François
- Sorbonne University, Univ. Pierre & Marie Curie Paris 06, CNRS, INSERM, APHP GH Pitié-Salpêtrière, Institut du cerveau et de la moelle épinière, Paris, France
| | - Carine Karachi
- Sorbonne University, Univ. Pierre & Marie Curie Paris 06, CNRS, INSERM, APHP GH Pitié-Salpêtrière, Institut du cerveau et de la moelle épinière, Paris, France.,AP-HP, Department of Neurosurgery, La Pitié-Salpêtrière University Hospital, Paris, France
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21
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Chen ZK, Yuan XS, Dong H, Wu YF, Chen GH, He M, Qu WM, Huang ZL. Whole-Brain Neural Connectivity to Lateral Pontine Tegmentum GABAergic Neurons in Mice. Front Neurosci 2019; 13:375. [PMID: 31068780 PMCID: PMC6491572 DOI: 10.3389/fnins.2019.00375] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 04/01/2019] [Indexed: 01/22/2023] Open
Abstract
The GABAergic neurons in the lateral pontine tegmentum (LPT) play key roles in the regulation of sleep and locomotion. The dysfunction of the LPT is related to neurological disorders such as rapid eye movement sleep behavior disorder and ocular flutter. However, the whole-brain neural connectivity to LPT GABAergic neurons remains poorly understood. Using virus-based, cell-type-specific, retrograde and anterograde tracing systems, we mapped the monosynaptic inputs and axonal projections of LPT GABAergic neurons in mice. We found that LPT GABAergic neurons received inputs mainly from the superior colliculus, substantia nigra pars reticulata, dorsal raphe nucleus (DR), lateral hypothalamic area (LHA), parasubthalamic nucleus, and periaqueductal gray (PAG), as well as the limbic system (e.g., central nucleus of the amygdala). Further immunofluorescence assays revealed that the inputs to LPT GABAergic neurons were colocalized with several markers associated with important neural functions, especially the sleep-wake cycle. Moreover, numerous LPT GABAergic neuronal varicosities were observed in the medial and midline part of the thalamus, the LHA, PAG, DR, and parabrachial nuclei. Interestingly, LPT GABAergic neurons formed reciprocal connections with areas related to sleep-wake and motor control, including the LHA, PAG, DR, parabrachial nuclei, and superior colliculus, only the LPT-DR connections were in an equally bidirectional manner. These results provide a structural framework to understand the underlying neural mechanisms of rapid eye movement sleep behavior disorder and disorders of saccades.
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Affiliation(s)
- Ze-Ka Chen
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Xiang-Shan Yuan
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Hui Dong
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Yong-Fang Wu
- Department of Neurology (Sleep Disorders), Chaohu Hospital of Anhui Medical University, Hefei, China
| | - Gui-Hai Chen
- Department of Neurology (Sleep Disorders), Chaohu Hospital of Anhui Medical University, Hefei, China
| | - Miao He
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Wei-Min Qu
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Zhi-Li Huang
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
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22
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Structure and function of the mesencephalic locomotor region in normal and parkinsonian primates. CURRENT OPINION IN PHYSIOLOGY 2019. [DOI: 10.1016/j.cophys.2019.01.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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