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Correa A, Ponzi A, Calderón VM, Migliore R. Pathological cell assembly dynamics in a striatal MSN network model. Front Comput Neurosci 2024; 18:1410335. [PMID: 38903730 PMCID: PMC11188713 DOI: 10.3389/fncom.2024.1410335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Accepted: 05/15/2024] [Indexed: 06/22/2024] Open
Abstract
Under normal conditions the principal cells of the striatum, medium spiny neurons (MSNs), show structured cell assembly activity patterns which alternate sequentially over exceedingly long timescales of many minutes. It is important to understand this activity since it is characteristically disrupted in multiple pathologies, such as Parkinson's disease and dyskinesia, and thought to be caused by alterations in the MSN to MSN lateral inhibitory connections and in the strength and distribution of cortical excitation to MSNs. To understand how these long timescales arise we extended a previous network model of MSN cells to include synapses with short-term plasticity, with parameters taken from a recent detailed striatal connectome study. We first confirmed the presence of sequentially switching cell clusters using the non-linear dimensionality reduction technique, Uniform Manifold Approximation and Projection (UMAP). We found that the network could generate non-stationary activity patterns varying extremely slowly on the order of minutes under biologically realistic conditions. Next we used Simulation Based Inference (SBI) to train a deep net to map features of the MSN network generated cell assembly activity to MSN network parameters. We used the trained SBI model to estimate MSN network parameters from ex-vivo brain slice calcium imaging data. We found that best fit network parameters were very close to their physiologically observed values. On the other hand network parameters estimated from Parkinsonian, decorticated and dyskinetic ex-vivo slice preparations were different. Our work may provide a pipeline for diagnosis of basal ganglia pathology from spiking data as well as for the design pharmacological treatments.
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Affiliation(s)
- Astrid Correa
- Institute of Biophysics, National Research Council, Palermo, Italy
| | - Adam Ponzi
- Institute of Biophysics, National Research Council, Palermo, Italy
- Center for Human Nature, Artificial Intelligence, and Neuroscience, Hokkaido University, Sapporo, Japan
| | - Vladimir M. Calderón
- Department of Developmental Neurobiology and Neurophysiology, Neurobiology Institute, National Autonomous University of Mexico, Querétaro, Mexico
| | - Rosanna Migliore
- Institute of Biophysics, National Research Council, Palermo, Italy
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2
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Reinshagen A. Grid cells: the missing link in understanding Parkinson's disease? Front Neurosci 2024; 18:1276714. [PMID: 38389787 PMCID: PMC10881698 DOI: 10.3389/fnins.2024.1276714] [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: 08/12/2023] [Accepted: 01/24/2024] [Indexed: 02/24/2024] Open
Abstract
The mechanisms underlying Parkinson's disease (PD) are complex and not fully understood, and the box-and-arrow model among other current models present significant challenges. This paper explores the potential role of the allocentric brain and especially its grid cells in several PD motor symptoms, including bradykinesia, kinesia paradoxa, freezing of gait, the bottleneck phenomenon, and their dependency on cueing. It is argued that central hubs, like the locus coeruleus and the pedunculopontine nucleus, often narrowly interpreted in the context of PD, play an equally important role in governing the allocentric brain as the basal ganglia. Consequently, the motor and secondary motor (e.g., spatially related) symptoms of PD linked with dopamine depletion may be more closely tied to erroneous computation by grid cells than to the basal ganglia alone. Because grid cells and their associated central hubs introduce both spatial and temporal information to the brain influencing velocity perception they may cause bradykinesia or hyperkinesia as well. In summary, PD motor symptoms may primarily be an allocentric disturbance resulting from virtual faulty computation by grid cells revealed by dopamine depletion in PD.
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3
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Rueda-Orozco PE, Hidalgo-Balbuena AE, González-Pereyra P, Martinez-Montalvo MG, Báez-Cordero AS. The Interactions of Temporal and Sensory Representations in the Basal Ganglia. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1455:141-158. [PMID: 38918350 DOI: 10.1007/978-3-031-60183-5_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
In rodents and primates, interval estimation has been associated with a complex network of cortical and subcortical structures where the dorsal striatum plays a paramount role. Diverse evidence ranging from individual neurons to population activity has demonstrated that this area hosts temporal-related neural representations that may be instrumental for the perception and production of time intervals. However, little is known about how temporal representations interact with other well-known striatal representations, such as kinematic parameters of movements or somatosensory representations. An attractive hypothesis suggests that somatosensory representations may serve as the scaffold for complex representations such as elapsed time. Alternatively, these representations may coexist as independent streams of information that could be integrated into downstream nuclei, such as the substantia nigra or the globus pallidus. In this review, we will revise the available information suggesting an instrumental role of sensory representations in the construction of temporal representations at population and single-neuron levels throughout the basal ganglia.
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Affiliation(s)
- Pavel E Rueda-Orozco
- Institute of Neurobiology, National Autonomous University of México, Querétaro, Mexico.
| | | | | | | | - Ana S Báez-Cordero
- Institute of Neurobiology, National Autonomous University of México, Querétaro, Mexico
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4
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Crawley AK, Sharma A, Coffey KR, West MO, Barker DJ. Nucleus accumbens shell neurons' early sensitivity to cocaine is associated with future increases in drug intake. ADDICTION NEUROSCIENCE 2023; 8:100107. [PMID: 37664219 PMCID: PMC10469398 DOI: 10.1016/j.addicn.2023.100107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
The striatum, both dorsal and ventral, is strongly implicated in substance use disorder. Chronic consumption of abused substances, such as cocaine, can cause an oversaturation of mesostriatal dopamine, which results in alterations in the firing of striatal neurons. While most preclinical studies of drug self-administration (S-A) are focused on these alterations, individual differences in a subject's early responses to drugs can also account for substantial differences in addiction susceptibility. In this study, we modeled longitudinal pharmacokinetics using data from a previous longitudinal study (Coffey et al., 2015) and aimed to determine if firing in specific dorsal and ventral striatal subregions was subject to changes across chronic cocaine S-A, and if individual animal differences in striatal firing in response to early drug exposure correlated with increases in drug intake. We observed that the firing patterns of nucleus accumbens (NAc) core and shell neurons exhibited increasing sensitivity to cocaine over the first 6 S-A sessions and maintained a strong negative correlation between drug intake and neuronal firing rates across chronic S-A. Moreover, we observed that the early sensitivity of NAc shell neurons to cocaine correlated with future increases in drug intake. Specifically, rats whose NAc shell neurons were most inhibited by increasing levels of cocaine upon first exposure exhibited the strongest increases in cocaine intake over time. If this difference can be linked to a genetic difference, or druggable targets, it may be possible to screen for similar addiction susceptibility in humans or develop novel preemptive pharmacotherapies.
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Affiliation(s)
- Ashley K. Crawley
- Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Department of Psychology, University of California, Los Angeles, Los Angeles, California, USA
| | - Anirudh Sharma
- Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY, USA
| | - Kevin R. Coffey
- Department of Psychiatry and Behavioral Science, University of Washington, Seattle, WA, USA
| | - Mark O. West
- Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - David J. Barker
- Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Brain Health Institute, Rutgers University, Piscataway, NJ, USA
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5
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Lack of action monitoring as a prerequisite for habitual and chunked behavior: Behavioral and neural correlates. iScience 2022; 26:105818. [PMID: 36636348 PMCID: PMC9830217 DOI: 10.1016/j.isci.2022.105818] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/01/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
We previously reported the rapid development of habitual behavior in a discrete-trials instrumental task in which lever insertion and retraction act as reward-predictive cues delineating sequence execution. Here we asked whether lever cues or performance variables reflective of skill and automaticity might account for habitual behavior in male rats. Behavior in the discrete-trials habit-promoting task was compared with two task variants lacking the sequence-delineating cues of lever extension and retraction. We find that behavior is under goal-directed control in absence of sequence-delineating cues but not in their presence, and that skilled performance does not predict goal-directed vs. habitual behavior. Neural activity recordings revealed an engagement of dorsolateral striatum and a disengagement of dorsomedial striatum during the sequence execution of the habit-promoting task, specifically. Together, these results indicate that sequence delineation cues promote habit and differential engagement of striatal subregions during instrumental responding, a pattern that may reflect cue-elicited behavioral chunking.
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Liang B, Zhang L, Zhang Y, Werner CT, Beacher NJ, Denman AJ, Li Y, Chen R, Gerfen CR, Barbera G, Lin DT. Striatal direct pathway neurons play leading roles in accelerating rotarod motor skill learning. iScience 2022; 25:104245. [PMID: 35494244 PMCID: PMC9046249 DOI: 10.1016/j.isci.2022.104245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/08/2022] [Accepted: 04/07/2022] [Indexed: 10/27/2022] Open
Abstract
Dorsal striatum is important for movement control and motor skill learning. However, it remains unclear how the spatially and temporally distributed striatal medium spiny neuron (MSN) activity in the direct and indirect pathways (D1 and D2 MSNs, respectively) encodes motor skill learning. Combining miniature fluorescence microscopy with an accelerating rotarod procedure, we identified two distinct MSN subpopulations involved in accelerating rotarod learning. In both D1 and D2 MSNs, we observed neurons that displayed activity tuned to acceleration during early stages of trials, as well as movement speed during late stages of trials. We found a distinct evolution trajectory for early-stage neurons during motor skill learning, with the evolution of D1 MSNs correlating strongly with performance improvement. Importantly, optogenetic inhibition of the early-stage neural activity in D1 MSNs, but not D2 MSNs, impaired accelerating rotarod learning. Together, this study provides insight into striatal D1 and D2 MSNs encoding motor skill learning.
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Affiliation(s)
- Bo Liang
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 333 Cassell Drive, Baltimore, MD 21224, USA
- School of Electrical Engineering & Computer Science, College of Engineering & Mines, University of North Dakota, Grand Forks, ND 58202, USA
| | - Lifeng Zhang
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 333 Cassell Drive, Baltimore, MD 21224, USA
| | - Yan Zhang
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 333 Cassell Drive, Baltimore, MD 21224, USA
| | - Craig T. Werner
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 333 Cassell Drive, Baltimore, MD 21224, USA
| | - Nicholas J. Beacher
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 333 Cassell Drive, Baltimore, MD 21224, USA
| | - Alex J. Denman
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 333 Cassell Drive, Baltimore, MD 21224, USA
| | - Yun Li
- Department of Zoology and Physiology, University of Wyoming, 1000 E University Avenue, Laramie, WY 82071, USA
| | - Rong Chen
- Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, 100 N Greene St, Baltimore, MD 21201, USA
| | - Charles R. Gerfen
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Building 49, Room 5A60, Bethesda, MD 20814, USA
| | - Giovanni Barbera
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 333 Cassell Drive, Baltimore, MD 21224, USA
| | - Da-Ting Lin
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 333 Cassell Drive, Baltimore, MD 21224, USA
- The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205, USA
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7
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Takahashi M, Fukabori R, Kawasaki H, Kobayashi K, Kawakami K. The distribution of Cdh20 mRNA demarcates somatotopic subregions and subpopulations of spiny projection neurons in the rat dorsolateral striatum. J Comp Neurol 2021; 529:3655-3675. [PMID: 34240415 DOI: 10.1002/cne.25215] [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: 01/29/2021] [Revised: 06/21/2021] [Accepted: 07/02/2021] [Indexed: 11/07/2022]
Abstract
The dorsolateral striatum (DLS) of rodents is functionally subdivided into somatotopic subregions that represent each body part along both the dorsoventral and anteroposterior (A-P) axes and play crucial roles in sensorimotor functions via corticostriatal pathways. However, little is known about the spatial gene expression patterns and heterogeneity of spiny projection neurons (SPNs) within somatotopic subregions. Here, we show that the cell adhesion molecule gene Cdh20, which encodes a Type II cadherin, is expressed in discrete subregions covering the inner orofacial area and part of the forelimb area in the ventral domain of the DLS (v-DLS) in rats. Cdh20-expressing cells were localized in the v-DLS at the intermediate level of the striatum along the A-P axis and could be classified as direct-pathway SPNs or indirect-pathway SPNs. Unexpectedly, comprehensive analysis revealed that Cdh20 is expressed in SPNs in the rat DLS but not in the mouse DLS or the ferret putamen (Pu). Our observations reveal that Cdh20 expression demarcates somatotopic subregions and subpopulations of SPNs specifically in the rat DLS and suggest divergent regulation of genes differentially expressed in the v-DLS and Pu among mammals.
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Affiliation(s)
- Masanori Takahashi
- Graduate School of Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan.,Division of Cardiology and Metabolism, Center for Molecular Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Ryoji Fukabori
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University School of Medicine, Fukushima, Fukushima, Japan
| | - Hiroshi Kawasaki
- Department of Medical Neuroscience, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Kazuto Kobayashi
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University School of Medicine, Fukushima, Fukushima, Japan
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8
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Abstract
Behavior is readily classified into patterns of movements with inferred common goals-actions. Goals may be discrete; movements are continuous. Through the careful study of isolated movements in laboratory settings, or via introspection, it has become clear that animals can exhibit exquisite graded specification to their movements. Moreover, graded control can be as fundamental to success as the selection of which action to perform under many naturalistic scenarios: a predator adjusting its speed to intercept moving prey, or a tool-user exerting the perfect amount of force to complete a delicate task. The basal ganglia are a collection of nuclei in vertebrates that extend from the forebrain (telencephalon) to the midbrain (mesencephalon), constituting a major descending extrapyramidal pathway for control over midbrain and brainstem premotor structures. Here we discuss how this pathway contributes to the continuous specification of movements that endows our voluntary actions with vigor and grace.
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Affiliation(s)
- Junchol Park
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia 20147, USA;
| | - Luke T Coddington
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia 20147, USA;
| | - Joshua T Dudman
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia 20147, USA;
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9
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Continuous Representations of Speed by Striatal Medium Spiny Neurons. J Neurosci 2020; 40:1679-1688. [PMID: 31953369 DOI: 10.1523/jneurosci.1407-19.2020] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 12/20/2019] [Accepted: 01/02/2020] [Indexed: 12/22/2022] Open
Abstract
The striatum is critical for controlling motor output. However, it remains unclear how striatal output neurons encode and facilitate movement. A prominent theory suggests that striatal units encode movements in bursts of activity near specific events, such as the start or end of actions. These bursts are theorized to gate or permit specific motor actions, thereby encoding and facilitating complex sequences of actions. An alternative theory has suggested that striatal neurons encode continuous changes in sensory or motor information with graded changes in firing rate. Supporting this theory, many striatal neurons exhibit such graded changes without bursting near specific actions. Here, we evaluated these two theories in the same recordings of mice (both male and female). We recorded single-unit and multiunit activity from the dorsomedial striatum of mice as they spontaneously explored an arena. We observed both types of encoding, although continuous encoding was more prevalent than bursting near movement initiation or termination. The majority of recorded units did not exhibit positive linear relationships with speed but instead exhibited nonlinear relationships that peaked at a range of locomotor speeds. Bulk calcium recordings of identified direct and indirect pathway neurons revealed similar speed tuning profiles, indicating that the heterogeneity in response profiles was not due to this genetic distinction. We conclude that continuous encoding of speed is a central component of movement encoding in the striatum.SIGNIFICANCE STATEMENT The striatum is a structure that is linked to volitional movements and is a primary site of pathology in movement disorders. It remains unclear how striatal neurons encode motor parameters and use them to facilitate movement. Here, we evaluated two models for this: a "discrete encoding model" in which striatal neurons facilitate movements with brief burst of activity near the start and end of movements, and a "continuous encoding model," in which striatal neurons encode the sensory or motor state of the animal with continuous changes in firing. We found evidence primarily in support of the continuous encoding model. This may have implications for understanding the striatal control of movement, as well as informing therapeutic approaches for treating movement disorders.
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10
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Hidalgo-Balbuena AE, Luma AY, Pimentel-Farfan AK, Peña-Rangel T, Rueda-Orozco PE. Sensory representations in the striatum provide a temporal reference for learning and executing motor habits. Nat Commun 2019; 10:4074. [PMID: 31501436 PMCID: PMC6733846 DOI: 10.1038/s41467-019-12075-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 08/18/2019] [Indexed: 12/25/2022] Open
Abstract
Previous studies indicate that the dorsolateral striatum (DLS) integrates sensorimotor information from cortical and thalamic regions to learn and execute motor habits. However, the exact contribution of sensory representations to this process is still unknown. Here we explore the role of the forelimb somatosensory flow in the DLS during the learning and execution of motor habits. First, we compare rhythmic somesthetic representations in the DLS and primary somatosensory cortex in anesthetized rats, and find that sequential and temporal stimuli contents are more strongly represented in the DLS. Then, using a behavioral protocol in which rats developed a stereotyped motor sequence, functional disconnection experiments, and pharmacologic and optogenetic manipulations in apprentice and expert animals, we reveal that somatosensory thalamic- and cortical-striatal pathways are indispensable for the temporal component of execution. Our results indicate that the somatosensory flow in the DLS provides the temporal reference for the development and execution of motor habits. The authors combine anatomical mapping, electrophysiological recordings, lesions, and pharmacological and optogenetic manipulations in rats to examine the role of forelimb somatosensory flow in the dorsolateral striatum in the learning and execution of motor habits.
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Affiliation(s)
- Ana E Hidalgo-Balbuena
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, UNAM, Campus Juriquilla, Boulevard Juriquilla No. 3001, Querétaro, 76230, Mexico
| | - Annie Y Luma
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, UNAM, Campus Juriquilla, Boulevard Juriquilla No. 3001, Querétaro, 76230, Mexico
| | - Ana K Pimentel-Farfan
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, UNAM, Campus Juriquilla, Boulevard Juriquilla No. 3001, Querétaro, 76230, Mexico
| | - Teresa Peña-Rangel
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, UNAM, Campus Juriquilla, Boulevard Juriquilla No. 3001, Querétaro, 76230, Mexico
| | - Pavel E Rueda-Orozco
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, UNAM, Campus Juriquilla, Boulevard Juriquilla No. 3001, Querétaro, 76230, Mexico.
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11
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Sales-Carbonell C, Taouali W, Khalki L, Pasquet MO, Petit LF, Moreau T, Rueda-Orozco PE, Robbe D. No Discrete Start/Stop Signals in the Dorsal Striatum of Mice Performing a Learned Action. Curr Biol 2018; 28:3044-3055.e5. [PMID: 30270180 DOI: 10.1016/j.cub.2018.07.038] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 06/15/2018] [Accepted: 07/11/2018] [Indexed: 10/28/2022]
Abstract
A popular hypothesis is that the dorsal striatum generates discrete "traffic light" signals that initiate, maintain, and terminate the execution of learned actions. Alternatively, the striatum may continuously monitor the dynamics of movements associated with action execution by processing inputs from somatosensory and motor cortices. Here, we recorded the activity of striatal neurons in mice performing a run-and-stop task and characterized the diversity of firing rate modulations relative to run performance (tuning curves) across neurons. We found that the tuning curves could not be statistically clustered in discrete functional groups (start or stop neurons). Rather, their shape varied continuously according to the movement dynamics of the task. Moreover, striatal spiking activity correlated with running speed on a run-by-run basis and was modulated by task-related non-locomotor movements, such as licking. We hypothesize that such moment-to-moment movement monitoring by the dorsal striatum contributes to the learning of adaptive actions and/or updating their kinematics.
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Affiliation(s)
- Carola Sales-Carbonell
- Département de Biologie, Aix-Marseille University, Parc Scientifique de Luminy, 13273 Marseille, France; INSERM, Unité 1249, Marseille, Parc Scientifique de Luminy, 13273 Marseille, France; INMED-Institut de Neurobiologie de la Méditerranée, Parc Scientifique de Luminy, 13273 Marseille, France
| | - Wahiba Taouali
- Département de Biologie, Aix-Marseille University, Parc Scientifique de Luminy, 13273 Marseille, France; INSERM, Unité 1249, Marseille, Parc Scientifique de Luminy, 13273 Marseille, France; INMED-Institut de Neurobiologie de la Méditerranée, Parc Scientifique de Luminy, 13273 Marseille, France
| | - Loubna Khalki
- Département de Biologie, Aix-Marseille University, Parc Scientifique de Luminy, 13273 Marseille, France; INSERM, Unité 1249, Marseille, Parc Scientifique de Luminy, 13273 Marseille, France; INMED-Institut de Neurobiologie de la Méditerranée, Parc Scientifique de Luminy, 13273 Marseille, France
| | - Matthieu O Pasquet
- Département de Biologie, Aix-Marseille University, Parc Scientifique de Luminy, 13273 Marseille, France; INSERM, Unité 1249, Marseille, Parc Scientifique de Luminy, 13273 Marseille, France; INMED-Institut de Neurobiologie de la Méditerranée, Parc Scientifique de Luminy, 13273 Marseille, France
| | - Ludovic F Petit
- Département de Biologie, Aix-Marseille University, Parc Scientifique de Luminy, 13273 Marseille, France; INSERM, Unité 1249, Marseille, Parc Scientifique de Luminy, 13273 Marseille, France; INMED-Institut de Neurobiologie de la Méditerranée, Parc Scientifique de Luminy, 13273 Marseille, France
| | - Typhaine Moreau
- Département de Biologie, Aix-Marseille University, Parc Scientifique de Luminy, 13273 Marseille, France; INSERM, Unité 1249, Marseille, Parc Scientifique de Luminy, 13273 Marseille, France; INMED-Institut de Neurobiologie de la Méditerranée, Parc Scientifique de Luminy, 13273 Marseille, France
| | - Pavel E Rueda-Orozco
- Département de Biologie, Aix-Marseille University, Parc Scientifique de Luminy, 13273 Marseille, France; INSERM, Unité 1249, Marseille, Parc Scientifique de Luminy, 13273 Marseille, France; INMED-Institut de Neurobiologie de la Méditerranée, Parc Scientifique de Luminy, 13273 Marseille, France
| | - David Robbe
- Département de Biologie, Aix-Marseille University, Parc Scientifique de Luminy, 13273 Marseille, France; INSERM, Unité 1249, Marseille, Parc Scientifique de Luminy, 13273 Marseille, France; INMED-Institut de Neurobiologie de la Méditerranée, Parc Scientifique de Luminy, 13273 Marseille, France.
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12
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Bouabid S, Zhou FM. Cyclic AMP-producing chemogenetic activation of indirect pathway striatal projection neurons and the downstream effects on the globus pallidus and subthalamic nucleus in freely moving mice. J Neurochem 2018; 145:436-448. [PMID: 29500819 DOI: 10.1111/jnc.14331] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 02/19/2018] [Accepted: 02/26/2018] [Indexed: 01/11/2023]
Abstract
The indirect pathway striatal medium spiny projection neurons (iMSNs) are critical to motor and cognitive brain functions. These neurons express a high level of cAMP-increasing adenosine A2a receptors. However, the potential effects of cAMP production on iMSN spiking activity have not been established, and recording identified iMSNs in freely moving animals is challenging. Here, we show that in the transgenic mice expressing cAMP-producing G protein Gs -coupled designer receptor exclusively activated by designer drug (Gs-DREADD) in iMSNs, the baseline spike firing in MSNs is normal, indicating DREADD expression does not affect the normal physiology of these neurons. Intraperitoneal injection of the DREADD agonist clozapine-N-oxide (CNO; 2.5 mg/kg) increased the spike firing in 50% of the recorded MSNs. However, CNO did not affect MSN firing in Gs-DREADD-negative mice. We also found that CNO injection inhibited the spike firing of globus pallidus external segment (GPe) neurons in Gs-DREADD-positive mice, further indicating CNO excitation of iMSNs. Temporally coincident with these effects on spiking firing in the indirect pathway, CNO injection selectively inhibited locomotion in D2 Gs-DREADD mice. Taken together, our results strongly suggest that cAMP production in iMSNs can increase iMSN spiking activity and cause motor inhibition, thus addressing a long-standing question about the cellular functions of the cAMP-producing adenosine A2a receptors in iMSNs. Cover Image for this issue: doi: 10.1111/jnc.14181.
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Affiliation(s)
- Safa Bouabid
- Department of Pharmacology, University of Tennessee College of Medicine, Memphis, Tennessee, USA
| | - Fu-Ming Zhou
- Department of Pharmacology, University of Tennessee College of Medicine, Memphis, Tennessee, USA
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13
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Coffey KR, Nader M, Bawa J, West MO. Homogeneous processing in the striatal direct and indirect pathways: single body part sensitive type IIb neurons may express either dopamine receptor D1 or D2. Eur J Neurosci 2017; 46:2380-2391. [PMID: 28887882 DOI: 10.1111/ejn.13690] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 08/25/2017] [Accepted: 08/29/2017] [Indexed: 11/28/2022]
Abstract
Striatal medium spiny projection neurons (MSNs) output through two diverging circuits, the 'direct and indirect pathways' which originate from minimally overlapping populations of MSNs expressing either the dopamine receptor D1 or the dopamine receptor D2. One modern theory of direct and indirect pathway function proposes that activation of direct pathway MSNs facilitates output of desired motor programs, while activation of indirect pathway MSNs inhibits competing motor programs. A separate theory suggests that coordinated timing or synchrony of the direct and indirect pathways is critical for the execution of refined movements. These hypotheses are made testable by a common type of striatal neuron known as type IIb MSNs. Clusters of these MSNs exhibit phasic increases in firing rate related to sensorimotor activity of single body parts. If these MSNs were to reside in only the direct pathway, evidence would be provided that D1 MSNs are 'motor program' specific, which would lend credence to the 'competing motor programs' hypothesis. However, if type IIb MSNs reside in both pathways, evidence would be provided for the 'coordinated timing or synchrony' hypothesis. Our results show that type IIb neurons may express either D1 or D2. This evidence supports the theory that the coordinated timing or synchrony of the direct and indirect pathways is critical for refined movements. We also propose a model in which the direct and indirect pathways act as a differentiator circuit, providing a possible mechanism by which coordinated activity of D1 and D2 neurons may output meaningful somatosensorimotor information to downstream structures.
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Affiliation(s)
- Kevin R Coffey
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ, 08854, USA.,Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, 98104, USA
| | - Miles Nader
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ, 08854, USA
| | - Jasmeet Bawa
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ, 08854, USA
| | - Mark O West
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ, 08854, USA
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Wei W, Ding S, Zhou FM. Dopaminergic treatment weakens medium spiny neuron collateral inhibition in the parkinsonian striatum. J Neurophysiol 2016; 117:987-999. [PMID: 27927785 DOI: 10.1152/jn.00683.2016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 12/07/2016] [Indexed: 11/22/2022] Open
Abstract
The striatal medium spiny neurons (MSNs) are critical to both motor and cognitive functions. A potential regulator of MSN activity is the GABAergic collateral axonal input from neighboring MSNs. These collateral axon terminals are further under the regulation of presynaptic dopamine (DA) receptors that may become dysfunctional when the intense striatal DA innervation is lost in Parkinson's disease (PD). We show that DA D1 receptor-expressing MSNs (D1-MSNs) and D2 receptor-expressing MSNs (D2-MSNs) each formed high-rate, one-way collateral connections with a homotypic preference in both normal and DA-denervated mouse striatum. Furthermore, whereas the homotypic preference, one-way directionality and the basal inhibitory strength were preserved, DA inhibited GABA release at the D2-MSN→D2-MSN collateral synapse in a supersensitive manner in the DA-denervated striatum. In contrast, for D1-MSN-originated collateral connections, whereas D1 agonism facilitated D1-MSN→D1-MSN collateral inhibition in the normal striatum, this presynaptic D1R facilitation of GABA release was lost in the parkinsonian striatum. These results indicate that in the parkinsonian striatum, dopaminergic treatment can presynaptically weaken the D2-MSN→D2-MSN collateral inhibition and disinhibit the surrounding D2-MSNs, whereas the D1-MSN→D1-MSN collateral inhibition is weakened by the loss of the presynaptic D1 receptor facilitation, disinhibiting the surrounding D1-MSNs. Together, these newly discovered effects can disrupt the MSN circuits in the parkinsonian striatum and may contribute to dopaminergic treatment-induced aberrant motor and nonmotor behaviors in PD.NEW & NOTEWORTHY With the use of a large database, this study establishes that neighboring homotypic striatal spiny projection neurons have a 50% chance to form one-way collateral inhibitory connection, a substantially higher rate than previous estimates. This study also shows that dopamine denervation may alter presynaptic dopamine receptor function such that dopaminergic treatment of Parkinson's disease can weaken the surround inhibition and may reduce the contrast of the striatal outputs, potentially contributing to dopamine's profound motor and nonmotor behavioral effects.
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Affiliation(s)
- Wei Wei
- Department of Pharmacology, University of Tennessee College of Medicine, Memphis, Tennessee
| | - Shengyuan Ding
- Department of Pharmacology, University of Tennessee College of Medicine, Memphis, Tennessee
| | - Fu-Ming Zhou
- Department of Pharmacology, University of Tennessee College of Medicine, Memphis, Tennessee
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Representation of the body in the lateral striatum of the freely moving rat: Fast Spiking Interneurons respond to stimulation of individual body parts. Brain Res 2016; 1657:101-108. [PMID: 27914882 DOI: 10.1016/j.brainres.2016.11.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 11/22/2016] [Accepted: 11/28/2016] [Indexed: 11/22/2022]
Abstract
Numerous studies have shown that certain types of striatal interneurons play a crucial role in selection and regulation of striatal output. Striatal Fast-Spiking Interneurons (FSIs) are parvalbumin positive, GABAergic interneurons that constitute less than 1% of the total striatal population. It is becoming increasingly evident that these sparsely distributed neurons exert a strong inhibitory effect on Medium Spiny projection Neurons (MSNs). MSNs in lateral striatum receive direct synaptic input from regions of cortex representing discrete body parts, and show phasic increases in activity during touch or movement of specific body parts. In the present study, we sought to determine whether lateral striatal FSIs identified by their electrophysiological properties, i.e., short-duration spike and fast firing rate (FR), display body part sensitivity similar to that exhibited by MSNs. During video recorded somatosensorimotor exams, each individual body part was stimulated and responses of single neurons were observed and quantified. Individual FSIs displayed patterns of activity related selectively to stimulation of a discrete body part. Most patterns of activity were similar to those exhibited by typical MSNs, but some phasic decreases were observed. These results serve as evidence that some striatal FSIs process information related to discrete body parts and participate in sensorimotor processing by striatal networks that contribute to motor output. STATEMENT OF SIGNIFICANCE Parvalbumin positive, striatal FSIs are hypothesized to play an important role in behavior by inhibiting MSNs. We asked a fundamental question regarding information processed during behavior by FSIs: whether FSIs, which preferentially occupy the sensorimotor portion of the striatum, process activity of discrete body parts. Our finding that they do, in a selective manner similar to MSNs, begins to reveal the types of phasic signals that FSI feed forward to projection neurons during striatal processing of cortical input regarding a specific sensorimotor event. These findings suggest new avenues for testing feed-forward inhibition theory as applied to striatum in naturalistic conditions, such as whether FSI decreases facilitate excitation of MSNs related to the current movement while FSI increases silence MSNs unrelated to the current movement.
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