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Estrada-Sánchez AM, Rangel-Barajas C, Howe AG, Barton SJ, Mach RH, Luedtke RR, Rebec GV. Selective Activation of D3 Dopamine Receptors Ameliorates DOI-Induced Head Twitching Accompanied by Changes in Corticostriatal Processing. Int J Mol Sci 2023; 24:ijms24119300. [PMID: 37298250 DOI: 10.3390/ijms24119300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/19/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023] Open
Abstract
D3 receptors, a key component of the dopamine system, have emerged as a potential target of therapies to improve motor symptoms across neurodegenerative and neuropsychiatric conditions. In the present work, we evaluated the effect of D3 receptor activation on the involuntary head twitches induced by 2,5-dimethoxy-4-iodoamphetamine (DOI) at behavioral and electrophysiological levels. Mice received an intraperitoneal injection of either a full D3 agonist, WC 44 [4-(2-fluoroethyl)-N-[4-[4-(2-methoxyphenyl)piperazin 1-yl]butyl]benzamide] or a partial D3 agonist, WW-III-55 [N-(4-(4-(4-methoxyphenyl)piperazin-1-yl)butyl)-4-(thiophen-3-yl)benzamide] five minutes before the intraperitoneal administration of DOI. Compared to the control group, both D3 agonists delayed the onset of the DOI-induced head-twitch response and reduced the total number and frequency of the head twitches. Moreover, the simultaneous recording of neuronal activity in the motor cortex (M1) and dorsal striatum (DS) indicated that D3 activation led to slight changes in a single unit activity, mainly in DS, and increased its correlated firing in DS or between presumed cortical pyramidal neurons (CPNs) and striatal medium spiny neurons (MSNs). Our results confirm the role of D3 receptor activation in controlling DOI-induced involuntary movements and suggest that this effect involves, at least in part, an increase in correlated corticostriatal activity. A further understanding of the underlying mechanisms may provide a suitable target for treating neuropathologies in which involuntary movements occur.
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Affiliation(s)
- Ana María Estrada-Sánchez
- Program in Neuroscience and Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN 47405, USA
- División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José No. 2055, Colonia Lomas 4a Sección, San Luis Potosi C.P. 78216, Mexico
| | - Claudia Rangel-Barajas
- Program in Neuroscience and Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN 47405, USA
| | - Andrew G Howe
- Psychology Department, University of California Los Angeles, Los Angeles, CA 90095, USA
- Intelligent Systems Laboratory, HRL Laboratories, LLC., Malibu, CA 90265, USA
| | - Scott J Barton
- Program in Neuroscience and Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN 47405, USA
| | - Robert H Mach
- Department of Radiology, University of Pennsylvania School of Medicine, Chemistry Building, 231 S. 34th St., Philadelphia, PA 19104, USA
| | - Robert R Luedtke
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, USA
| | - George V Rebec
- Program in Neuroscience and Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN 47405, USA
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Cuellar-Santoyo AO, Ruiz-Rodríguez VM, Mares-Barbosa TB, Patrón-Soberano A, Howe AG, Portales-Pérez DP, Miquelajáuregui Graf A, Estrada-Sánchez AM. Revealing the contribution of astrocytes to glutamatergic neuronal transmission. Front Cell Neurosci 2023; 16:1037641. [PMID: 36744061 PMCID: PMC9893894 DOI: 10.3389/fncel.2022.1037641] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 12/20/2022] [Indexed: 01/20/2023] Open
Abstract
Research on glutamatergic neurotransmission has focused mainly on the function of presynaptic and postsynaptic neurons, leaving astrocytes with a secondary role only to ensure successful neurotransmission. However, recent evidence indicates that astrocytes contribute actively and even regulate neuronal transmission at different levels. This review establishes a framework by comparing glutamatergic components between neurons and astrocytes to examine how astrocytes modulate or otherwise influence neuronal transmission. We have included the most recent findings about the role of astrocytes in neurotransmission, allowing us to understand the complex network of neuron-astrocyte interactions. However, despite the knowledge of synaptic modulation by astrocytes, their contribution to specific physiological and pathological conditions remains to be elucidated. A full understanding of the astrocyte's role in neuronal processing could open fruitful new frontiers in the development of therapeutic applications.
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Affiliation(s)
- Ares Orlando Cuellar-Santoyo
- División de Biología Molecular, Laboratorio de Neurobiología, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), San Luis Potosí, Mexico
| | - Victor Manuel Ruiz-Rodríguez
- División de Biología Molecular, Laboratorio de Neurobiología, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), San Luis Potosí, Mexico
| | - Teresa Belem Mares-Barbosa
- División de Biología Molecular, Laboratorio de Neurobiología, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), San Luis Potosí, Mexico,Translational and Molecular Medicine Laboratory, Research Center for Health Sciences and Biomedicine, Autonomous University of San Luis Potosí, San Luis Potosí, Mexico
| | - Araceli Patrón-Soberano
- División de Biología Molecular, Laboratorio de Neurobiología, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), San Luis Potosí, Mexico
| | - Andrew G. Howe
- Intelligent Systems Laboratory, HRL Laboratories, LLC, Malibu, CA, United States
| | - Diana Patricia Portales-Pérez
- Translational and Molecular Medicine Laboratory, Research Center for Health Sciences and Biomedicine, Autonomous University of San Luis Potosí, San Luis Potosí, Mexico
| | | | - Ana María Estrada-Sánchez
- División de Biología Molecular, Laboratorio de Neurobiología, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), San Luis Potosí, Mexico,*Correspondence: Ana María Estrada-Sánchez
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Howe AG, Blair HT. Modulation of lateral septal and dorsomedial striatal neurons by hippocampal sharp-wave ripples, theta rhythm, and running speed. Hippocampus 2021; 32:153-178. [PMID: 34918836 PMCID: PMC9299855 DOI: 10.1002/hipo.23398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 05/04/2021] [Accepted: 11/28/2021] [Indexed: 11/12/2022]
Abstract
Single units were recorded in hippocampus, lateral septum (LS), and dorsomedial striatum (DMS) while freely behaving rats (n = 3) ran trials in a T‐maze task and rested in a holding bucket between trials. In LS, 28% (64/226) of recorded neurons were excited and 14% (31/226) were inhibited during sharp wave ripples (SWRs). LS neurons that were excited during SWRs fired preferentially on the downslope of hippocampal theta rhythm and had firing rates that were positively correlated with running speed; LS neurons that were inhibited during SWRs fired preferentially on the upslope of hippocampal theta rhythm and had firing rates that were negatively correlated with running speed. In DMS, only 3.3% (12/366) of recorded neurons were excited and 5.7% (21/366) were inhibited during SWRs. As in LS, DMS neurons that were excited by SWRs tended to have firing rates that were positively modulated by running speed, whereas DMS neurons that were inhibited by SWRs tended to have firing rates that were negatively modulated by running speed. But in contrast with LS, these two DMS subpopulations did not clearly segregate their spikes to different phases of the theta cycle. Based on these results and a review of prior findings, we discuss how concurrent activation of spatial trajectories in hippocampus and motor representations in LS and DMS may contribute to neural computations that support reinforcement learning and value‐based decision making.
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Affiliation(s)
- Andrew G Howe
- Department of Psychology, UCLA, Los Angeles, California, USA
| | - Hugh T Blair
- Department of Psychology, UCLA, Los Angeles, California, USA
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Estrada-Sánchez AM, Blake CL, Barton SJ, Howe AG, Rebec GV. Lack of mutant huntingtin in cortical efferents improves behavioral inflexibility and corticostriatal dynamics in Huntington's disease mice. J Neurophysiol 2019; 122:2621-2629. [PMID: 31693428 DOI: 10.1152/jn.00777.2018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Abnormal communication between cerebral cortex and striatum plays a major role in the motor symptoms of Huntington's disease (HD), a neurodegenerative disorder caused by a mutation of the huntingtin gene (mHTT). Because cortex is the main driver of striatal processing, we recorded local field potential (LFP) activity simultaneously in primary motor cortex (M1) and dorsal striatum (DS) in BACHD mice, a full-length HD gene model, and in a conditional BACHD/Emx-1 Cre (BE) model in which mHTT is suppressed in cortical efferents, while mice freely explored a plus-shaped maze beginning at 20 wk of age. Relative to wild-type (WT) controls, BACHD mice were just as active across >40 wk of testing but became progressively less likely to turn into a perpendicular arm as they approached the choice point of the maze, a sign of HD motor inflexibility. BE mice, in contrast, turned as freely as WT throughout testing. Although BE mice did not exactly match WT in LFP activity, the reduction in alpha (8-13 Hz), beta (13-30 Hz), and low-gamma (30-50 Hz) power that occurred in M1 of turning-impaired BACHD mice was reversed. No reversal occurred in DS. In fact, BE mice showed further reductions in DS theta (4-8 Hz), beta, and low-gamma power relative to the BACHD model. Coherence analysis indicated a dysregulation of corticostriatal information flow in both BACHD and BE mice. Collectively, our results suggest that mHTT in cortical outputs drives the dysregulation of select cortical frequencies that accompany the loss of behavioral flexibility in HD.NEW & NOTEWORTHY BACHD mice, a full-length genetic model of Huntington's disease (HD), express aberrant local field potential (LFP) activity in primary motor cortex (M1) along with decreased probability of turning into a perpendicular arm of a plus-shaped maze, a motor inflexibility phenotype. Suppression of the mutant huntingtin gene in cortical output neurons prevents decline in turning and improves alpha, beta, and low-gamma activity in M1. Our results implicate cortical networks in the search for therapeutic strategies to alleviate HD motor signs.
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Affiliation(s)
- Ana María Estrada-Sánchez
- Program in Neuroscience and Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana.,Departmento de Biología Molecular, Instituto Potosino De Investigación Científica y Tecnológica, San Luis Potosí, Mexico
| | - Courtney L Blake
- Program in Neuroscience and Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana
| | - Scott J Barton
- Program in Neuroscience and Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana
| | - Andrew G Howe
- Neuroscience Interdepartmental Program, University of California, Los Angeles, California.,Department of Psychology, University of California, Los Angeles, California
| | - George V Rebec
- Program in Neuroscience and Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana
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Bilder RM, Howe AG, Sabb FW. "Multilevel models from biology to psychology: Mission impossible": Correction to Bilder, Howe, and Sabb (2013). Journal of Abnormal Psychology 2013. [DOI: 10.1037/h0096002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
Systematic efforts are underway to address major flaws in the current diagnostic taxonomy of mental disorders, fostering hope that a new nosology might be based on brain biology. The National Institute of Mental Health Research Domains Criteria (RDoC) initiative aims to redefine mental illness leveraging information that spans molecular to behavioral levels of analysis. Major effort is still needed to forge multilevel conceptual and measurement models capable of representing knowledge within and across these levels. The development of such models may help refine and share complex hypotheses, and reduce the risk of replacing the current taxonomy with dimensions and/or categories that manifest little incremental biological validity. To create useful models we need to define concepts, relations among concepts, and links to supporting evidence. Some methods already enable representation of concepts and measures at the levels of behavioral and basic biological processes, but a major gap at the level of neural circuitry must be bridged to link basic biological and behavioral levels. We provide a schematic framework, using as an example the representation of selected "working memory" concepts and evidence across multiple levels of analysis as these have been described in the RDoC Workshops. This example illustrates multiple challenges and some possible solutions that may help clarify the aims of individual research projects and enable integration of diverse efforts on RDoC and related initiatives.
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Affiliation(s)
- Robert M Bilder
- Jane and Terry Semel Institute for Neuroscience & Human Behavior
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Abstract
(79)Br NMR spectroscopy has been used to monitor a series of reactions in which the bromide ion is produced, including the Menschutkin reaction of pyridine with a range of substituted benzyl bromides and a Heck coupling process. In cases where the process could also be monitored using (1)H NMR spectroscopy, the kinetic analyses using heteronuclear magnetic resonance spectroscopy were shown to be completely consistent. Both the utility of the process in following reactions which may be difficult to analyse using other techniques and the practical limitations associated with solvent choice are discussed.
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Affiliation(s)
- Si Jia Chan
- School of Chemistry, University of New South Wales, Sydney NSW 2052, Australia
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Yau HM, Howe AG, Hook JM, Croft AK, Harper JB. Solvent reorganisation as the driving force for rate changes of Menschutkin reactions in an ionic liquid. Org Biomol Chem 2009; 7:3572-5. [DOI: 10.1039/b909171h] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Howe AG, Levy WB. A hippocampal model predicts a fluctuating phase transition when learning certain trace conditioning paradigms. Cogn Neurodyn 2007; 1:143-55. [PMID: 19003508 DOI: 10.1007/s11571-006-9012-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Accepted: 12/02/2006] [Indexed: 11/30/2022] Open
Abstract
The hippocampus is needed for at least one kind of trace classical conditioning, the air-puff eye-blink paradigm. A simple model of region CA3 predicts three basic, quantitative observations of the learning behavior of rabbits. One particular quantified prediction is the learnable trace interval. The boundary region of the reliably learnable trace interval represents a phase transition. Within this transition, three behaviorally distinguishable modes are expressed: failure to blink; blink too soon; and occasionally, appropriate predictive blinking. In the region of the phase transition, there is a small sub-interval where the behavioral modes fluctuate rapidly from trial to trial for individual simulations. Such observed fluctuations are an experimental prediction by the model. The discussion also includes a brief conjecture concerning the underlying cause of the phase transition and the fluctuations.
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Affiliation(s)
- Andrew G Howe
- Department of Neurosurgery, University of Virginia, P.O. Box 800420, Charlottesville, VA, 22908, USA
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Howe AG, McMaster CR. Regulation of vesicle trafficking, transcription, and meiosis: lessons learned from yeast regarding the disparate biologies of phosphatidylcholine. Biochim Biophys Acta 2001; 1534:65-77. [PMID: 11786293 DOI: 10.1016/s1388-1981(01)00181-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Phosphatidylcholine (PtdCho) is the major phospholipid present in eukaryotic cell membranes generally comprising 50% of the phospholipid mass of most cells and their requisite organelles. PtdCho has a major structural role in maintaining cell and organelle integrity, and thus its synthesis must be tightly monitored to ensure appropriate PtdCho levels are present to allow for its coordination with cell growth regulatory mechanisms. One would also expect that there needs to be coordinated regulation of PtdCho synthesis with its transport from its site of synthesis to cellular organelles to ensure organellar structures and functions are maintained. Each of these processes need to be intimately coordinated with cellular growth decision making processes. To this end, it has recently been revealed that ongoing PtdCho synthesis is required for global transcriptional regulation of phospholipid synthesis. PtdCho is also a major component of intracellular transport vesicles and the synthesis of PtdCho is intimately involved in the regulation of vesicle transport from the Golgi apparatus to the cell surface and the vacuole (yeast equivalent of the mammalian lysosome). This review details some of the more recent advances in our knowledge concerning the role of PtdCho in the regulation of global lipid homeostasis through (i) its restriction of the trafficking of intracellular vesicles that distribute lipids and proteins from their sites of synthesis to their ultimate cellular destinations, (ii) its regulation of specific transcriptional processes that coordinate lipid biosynthetic pathways, and (iii) the role of PtdCho catabolism in the regulation of meiosis. Combined, these regulatory roles for PtdCho ensure vesicular, organellar, and cellular membrane biogenesis occur in a coordinated manner.
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Affiliation(s)
- A G Howe
- Departments of Pediatrics and Biochemistry and Molecular Biology, Atlantic Research Centre, IWK Health Centre, Dalhousie University, 5849 University Avenue, Halifax, NS B3H 4H7, Canada
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Dusek JJ, Howe AG, Carr RF, Davis LF. Clinicopathologic conferences. Case 37, Part I. J Oral Maxillofac Surg 1982; 40:38-40. [PMID: 6950036 DOI: 10.1016/s0278-2391(82)80014-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Abstract
The odontogenic keratocyst is an established pathologic entity. Dentists must be aware of its existence and understand its clinical characteristics. Because it is impossible to radiographically and clinically differentiate the keratocyst from more innocuous odontogenic cysts, all cystic lesions removed from patients should be submitted for histopathologic examination and diagnosis.
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Howe AG, Kent JN, Farrell CD, Poidmore SJ. Implant of articular eminence for recurrent dislocation of the temporomandibular joint. J Oral Surg 1978; 36:523-6. [PMID: 277636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Hypermobility of the temporomandibular joint is often caused by trauma, by opening the mouth too wide, by having a mouth forced open during general anesthesia procedures, or by dental procedures. The capsule may be stretched to an extent that dislocation occurs more easily thereafter. An implant of Vitallium mesh attached to the zygoma to restrict anterior movement of the condyle is used to prevent recurrent dislocation of the temporomandibular joint.
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