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Pignatelli A, Benedusi M, Barbieri M, Pecorelli A, Valacchi G. Tropospheric ozone effect on olfactory perception and olfactory bulb dopaminergic interneuron excitability. Neurotoxicology 2024; 104:36-44. [PMID: 39004287 DOI: 10.1016/j.neuro.2024.07.003] [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: 01/24/2024] [Revised: 06/14/2024] [Accepted: 07/04/2024] [Indexed: 07/16/2024]
Abstract
Ozone (O3) forms in the Earth's atmosphere, both naturally and by reactions of man-made air pollutants. Deleterious effects of O3 have been found in the respiratory system. Here, we examine whether O3 alters olfactory behavior and cellular properties in the olfactory system. For this purpose, mice were exposed to O3 at a concentration found in highly polluted city air [0.8 ppm], and the behavior elicited by social and non-social odors in habituation/dishabituation tests was assessed. In addition, the electrical responses of dopaminergic olfactory bulb (OB) neurons were also evaluated. O3 differentially compromises olfactory perception to odors: it reduces responses to social and non-social odors in Swiss Webster mice, while this effect was observed in C57BL/6 J mice only for some non-social odors. Additionally, O3 reduced the rate of spontaneous spike firing in periglomerular dopaminergic cells (PG-DA) of the OB. Because this effect could reflect changes in excitability and/or synaptic inputs, the ability of O3 to alter PG-DA spontaneous activity was also tested together with cell membrane resistance, membrane potential, rheobase and chronaxie. Taken together, our data suggest the ability of O3 to affect olfactory perception.
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Affiliation(s)
- Angela Pignatelli
- Dept. of Neuroscience and Rehabilitation, University of Ferrara, Ferrara 44121, Italy.
| | - Mascia Benedusi
- Dept. of Neuroscience and Rehabilitation, University of Ferrara, Ferrara 44121, Italy.
| | - Mario Barbieri
- Dept. of Neuroscience and Rehabilitation, University of Ferrara, Ferrara 44121, Italy.
| | - Alessandra Pecorelli
- Dept. of Environmental and Prevention Sciences, University of Ferrara, Ferrara 44121, Italy.
| | - Giuseppe Valacchi
- Dept. of Environmental and Prevention Sciences, University of Ferrara, Ferrara 44121, Italy; Dept. of Animal Sciences, Plants for Human Health Institute, NC Research Campus, NC State University, Kannapolis, NC 28081, USA; Dept. of Food and Nutrition, Kyung Hee University, Seoul 26723, Republic of Korea.
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Pulcrano S, De Gregorio R, De Sanctis C, Volpicelli F, Piscitelli RM, Speranza L, Perrone-Capano C, di Porzio U, Caiazzo M, Martini A, Giacomet C, Medina D, Awatramani R, Viggiano D, Federici M, Mercuri NB, Guatteo E, Bellenchi GC. miR-218 Promotes Dopaminergic Differentiation and Controls Neuron Excitability and Neurotransmitter Release through the Regulation of a Synaptic-Related Genes Network. J Neurosci 2023; 43:8104-8125. [PMID: 37816598 PMCID: PMC10697421 DOI: 10.1523/jneurosci.0431-23.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 07/25/2023] [Accepted: 08/10/2023] [Indexed: 10/12/2023] Open
Abstract
In the brain, microRNAs (miRNAs) are believed to play a role in orchestrating synaptic plasticity at a higher level by acting as an additional mechanism of translational regulation, alongside the mRNA/polysome system. Despite extensive research, our understanding of the specific contribution of individual miRNA to the function of dopaminergic neurons (DAn) remains limited. By performing a dopaminergic-specific miRNA screening, we have identified miR-218 as a critical regulator of DAn activity in male and female mice. We have found that miR-218 is specifically expressed in mesencephalic DAn and is able to promote dopaminergic differentiation of embryonic stem cells and functional maturation of transdifferentiated induced DA neurons. Midbrain-specific deletion of both genes encoding for miR-218 (referred to as miR-218-1 and mir218-2) affects the expression of a cluster of synaptic-related mRNAs and alters the intrinsic excitability of DAn, as it increases instantaneous frequencies of evoked action potentials, reduces rheobase current, affects the ionic current underlying the action potential after hyperpolarization phase, and reduces dopamine efflux in response to a single electrical stimulus. Our findings provide a comprehensive understanding of the involvement of miR-218 in the dopaminergic system and highlight its role as a modulator of dopaminergic transmission.SIGNIFICANCE STATEMENT In the past decade, several miRNAs have emerged as potential regulators of synapse activity through the modulation of specific gene expression. Among these, we have identified a dopaminergic-specific miRNA, miR-218, which is able to promote dopaminergic differentiation and regulates the translation of an entire cluster of synapse related mRNAs. Deletion of miR-218 has notable effects on dopamine release and alters the intrinsic excitability of dopaminergic neurons, indicating a direct control of dopaminergic activity by miR-218.
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Affiliation(s)
- Salvatore Pulcrano
- Institute of Genetics and Biophysics, Consiglio Nazionale delle Ricerche, Naples, 80131, Italy
| | - Roberto De Gregorio
- Institute of Genetics and Biophysics, Consiglio Nazionale delle Ricerche, Naples, 80131, Italy
- Caryl and Israel Englander Institute for Precision Medicine, Weill Cornell Medicine and New York Presbyterian, New York, New York 10021
| | - Claudia De Sanctis
- Institute of Genetics and Biophysics, Consiglio Nazionale delle Ricerche, Naples, 80131, Italy
- Neuropathology Brain Bank at Mount Sinai, New York, New York 10029
| | - Floriana Volpicelli
- Institute of Genetics and Biophysics, Consiglio Nazionale delle Ricerche, Naples, 80131, Italy
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Naples, 80131, Italy
| | - Rosa Maria Piscitelli
- Fondazione Santa Lucia Istituto Di Ricovero e Cura a Carattere Scientifico, Rome, 00143, Italy
| | - Luisa Speranza
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, New York, New York 10461
| | - Carla Perrone-Capano
- Institute of Genetics and Biophysics, Consiglio Nazionale delle Ricerche, Naples, 80131, Italy
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Naples, 80131, Italy
| | - Umberto di Porzio
- Institute of Genetics and Biophysics, Consiglio Nazionale delle Ricerche, Naples, 80131, Italy
| | - Massimiliano Caiazzo
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, 80131, Italy
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, 3584 CG, The Netherlands
| | - Alessandro Martini
- Fondazione Santa Lucia Istituto Di Ricovero e Cura a Carattere Scientifico, Rome, 00143, Italy
| | - Cecilia Giacomet
- Fondazione Santa Lucia Istituto Di Ricovero e Cura a Carattere Scientifico, Rome, 00143, Italy
| | - Diego Medina
- Telethon Institute of Genetics and Medicine, Pozzuoli, 80078, Italy
- Department of Medical and Translational Science, Federico II University, Naples, 80131, Italy
| | | | - Davide Viggiano
- Department of Translational Medical Sciences, University of Campania "L. Vanvitelli," Naples, 80131, Italy
| | - Mauro Federici
- Fondazione Santa Lucia Istituto Di Ricovero e Cura a Carattere Scientifico, Rome, 00143, Italy
| | - Nicola B Mercuri
- Fondazione Santa Lucia Istituto Di Ricovero e Cura a Carattere Scientifico, Rome, 00143, Italy
- University of Tor Vergata, Department of Systems Medicine, Rome, 00133, Italy
| | - Ezia Guatteo
- Fondazione Santa Lucia Istituto Di Ricovero e Cura a Carattere Scientifico, Rome, 00143, Italy
- Department of Motor Science and Wellness, Parthenope University, Naples, 80133, Italy
| | - Gian Carlo Bellenchi
- Institute of Genetics and Biophysics, Consiglio Nazionale delle Ricerche, Naples, 80131, Italy
- Fondazione Santa Lucia Istituto Di Ricovero e Cura a Carattere Scientifico, Rome, 00143, Italy
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Sharma R, Neupane C, Pham TL, Lee M, Lee S, Lee SY, Nam MH, Kim CS, Park JB. Tonic Activation of NR2D-Containing NMDARs Exacerbates Dopaminergic Neuronal Loss in MPTP-Injected Parkinsonian Mice. J Neurosci 2023; 43:7730-7744. [PMID: 37726169 PMCID: PMC10648527 DOI: 10.1523/jneurosci.1955-22.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 09/01/2023] [Accepted: 09/08/2023] [Indexed: 09/21/2023] Open
Abstract
NR2D subunit-containing NMDA receptors (NMDARs) gradually disappear during brain maturation but can be recruited by pathophysiological stimuli in the adult brain. Here, we report that 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) intoxication recruited NR2D subunit-containing NMDARs that generated an Mg2+-resistant tonic NMDA current (INMDA) in dopaminergic (DA) neurons in the midbrain of mature male mice. MPTP selectively generated an Mg2+-resistant tonic INMDA in DA neurons in the substantia nigra pars compacta (SNpc) and ventral tegmental area (VTA). Consistently, MPTP increased NR2D but not NR2B expression in the midbrain regions. Pharmacological or genetic NR2D interventions abolished the generation of Mg2+-resistant tonic INMDA in SNpc DA neurons, and thus attenuated subsequent DA neuronal loss and gait deficits in MPTP-treated mice. These results show that extrasynaptic NR2D recruitment generates Mg2+-resistant tonic INMDA and exacerbates DA neuronal loss, thus contributing to MPTP-induced Parkinsonism. The state-dependent NR2D recruitment could be a novel therapeutic target for mitigating cell type-specific neuronal death in neurodegenerative diseases.SIGNIFICANCE STATEMENT NR2D subunit-containing NMDA receptors (NMDARs) are widely expressed in the brain during late embryonic and early postnatal development, and then downregulated during brain maturation and preserved at low levels in a few regions of the adult brain. Certain stimuli can recruit NR2D subunits to generate tonic persistent NMDAR currents in nondepolarized neurons in the mature brain. Our results show that MPTP intoxication recruits NR2D subunits in midbrain dopaminergic (DA) neurons, which leads to tonic NMDAR current-promoting dopaminergic neuronal death and consequent abnormal gait behavior in the MPTP mouse model of Parkinson's disease (PD). This is the first study to indicate that extrasynaptic NR2D recruitment could be a target for preventing neuronal death in neurodegenerative diseases.
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Affiliation(s)
- Ramesh Sharma
- Department of Biomedicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Physiology, Chungnam National University, Daejeon 35015, Republic of Korea
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08852, Republic of Korea
| | - Chiranjivi Neupane
- Department of Biomedicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Physiology, Chungnam National University, Daejeon 35015, Republic of Korea
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08852, Republic of Korea
| | - Thuy Linh Pham
- Department of Biomedicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Physiology, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Miae Lee
- Physiology, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Sanghoon Lee
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08852, Republic of Korea
| | - So Yeong Lee
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08852, Republic of Korea
| | - Min-Ho Nam
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Cuk-Seong Kim
- Department of Biomedicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Physiology, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Jin Bong Park
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08852, Republic of Korea
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Characterization by Gene Expression Analysis of Two Groups of Dopaminergic Cells Isolated from the Mouse Olfactory Bulb. BIOLOGY 2023; 12:biology12030367. [PMID: 36979058 PMCID: PMC10045757 DOI: 10.3390/biology12030367] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/02/2023] [Accepted: 02/23/2023] [Indexed: 03/02/2023]
Abstract
The olfactory bulb (OB) is one of two regions of the mammalian brain which undergo continuous neuronal replacement during adulthood. A significant fraction of the cells added in adulthood to the bulbar circuitry is constituted by dopaminergic (DA) neurons. We took advantage of a peculiar property of dopaminergic neurons in transgenic mice expressing eGFP under the tyrosine hydroxylase (TH) promoter: while DA neurons located in the glomerular layer (GL) display full electrophysiological maturation, eGFP+ cells in the mitral layer (ML) show characteristics of immature cells. In addition, they also display a lower fluorescence intensity, possibly reflecting different degrees of maturation. To investigate whether this difference in maturation might be confirmed at the gene expression level, we used a fluorescence-activated cell sorting technique on enzymatically dissociated cells of the OB. The cells were divided into two groups based on their level of fluorescence, possibly corresponding to immature ML cells and fully mature DA neurons from the GL. Semiquantitative real-time PCR was performed to detect the level of expression of genes linked to the degree of maturation of DA neurons. We showed that indeed the cells expressing low eGFP fluorescence are immature neurons. Our method can be further used to explore the differences between these two groups of DA neurons.
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Tomagra G, Franchino C, Cesano F, Chiarion G, de lure A, Carbone E, Calabresi P, Mesin L, Picconi B, Marcantoni A, Carabelli V. Alpha-synuclein oligomers alter the spontaneous firing discharge of cultured midbrain neurons. Front Cell Neurosci 2023; 17:1078550. [PMID: 36744002 PMCID: PMC9896582 DOI: 10.3389/fncel.2023.1078550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/06/2023] [Indexed: 01/21/2023] Open
Abstract
The aim of this work was to monitor the effects of extracellular α-synuclein on the firing activity of midbrain neurons dissociated from substantia nigra TH-GFP mice embryos and cultured on microelectrode arrays (MEA). We monitored the spontaneous firing discharge of the network for 21 days after plating and the role of glutamatergic and GABAergic inputs in regulating burst generation and network synchronism. Addition of GABA A , AMPA and NMDA antagonists did not suppress the spontaneous activity but allowed to identify three types of neurons that exhibited different modalities of firing and response to applied L-DOPA: high-rate (HR) neurons, low-rate pacemaking (LR-p), and low-rate non-pacemaking (LR-np) neurons. Most HR neurons were insensitive to L-DOPA, while the majority of LR-p neurons responded with a decrease of the firing discharge; less defined was the response of LR-np neurons. The effect of exogenous α-synuclein (α-syn) on the firing discharge of midbrain neurons was then studied by varying the exposure time (0-48 h) and the α-syn concentration (0.3-70 μM), while the formation of α-syn oligomers was monitored by means of AFM. Independently of the applied concentration, acute exposure to α-syn monomers did not exert any effect on the spontaneous firing rate of HR, LR-p, and LR-np neurons. On the contrary, after 48 h exposure, the firing activity was drastically altered at late developmental stages (14 days in vitro, DIV, neurons): α-syn oligomers progressively reduced the spontaneous firing discharge (IC50 = 1.03 μM), impaired burst generation and network synchronism, proportionally to the increased oligomer/monomer ratio. Different effects were found on early-stage developed neurons (9 DIV), whose firing discharge remained unaltered, regardless of the applied α-syn concentration and the exposure time. Our findings unravel, for the first time, the variable effects of exogenous α-syn at different stages of midbrain network development and provide new evidence for the early detection of neuronal function impairment associated to aggregated forms of α-syn.
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Affiliation(s)
- Giulia Tomagra
- Drug Science Department, University of Torino, Turin, Italy
- Nanostructured Interfaces and Surfaces Inter-Departmental Research Centre, Turin, Italy
| | | | - Federico Cesano
- Nanostructured Interfaces and Surfaces Inter-Departmental Research Centre, Turin, Italy
- Department of Chemistry and INSTM-UdR Torino, Turin, Italy
| | - Giovanni Chiarion
- Mathematical Biology and Physiology, Department of Electronics and Telecommunications, Turin, Italy
| | - Antonio de lure
- Laboratory Experimental Neurophysiology, IRCCS San Raffaele Rome, Rome, Italy
| | - Emilio Carbone
- Drug Science Department, University of Torino, Turin, Italy
- Nanostructured Interfaces and Surfaces Inter-Departmental Research Centre, Turin, Italy
| | - Paolo Calabresi
- Neurological Clinic, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
- Neurology, Department of Neuroscience, Faculty of Medicine, Università Cattolica del “Sacro Cuore,”Rome, Italy
| | - Luca Mesin
- Mathematical Biology and Physiology, Department of Electronics and Telecommunications, Turin, Italy
| | - Barbara Picconi
- Laboratory Experimental Neurophysiology, IRCCS San Raffaele Rome, Rome, Italy
- Dipartimento di Scienze Umane e Promozione della Qualitá della Vita, Telematic University San Raffaele Roma, Rome, Italy
| | - Andrea Marcantoni
- Drug Science Department, University of Torino, Turin, Italy
- Nanostructured Interfaces and Surfaces Inter-Departmental Research Centre, Turin, Italy
| | - Valentina Carabelli
- Drug Science Department, University of Torino, Turin, Italy
- Nanostructured Interfaces and Surfaces Inter-Departmental Research Centre, Turin, Italy
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Troshev D, Bannikova A, Blokhin V, Kolacheva A, Pronina T, Ugrumov M. Striatal Neurons Partially Expressing a Dopaminergic Phenotype: Functional Significance and Regulation. Int J Mol Sci 2022; 23:ijms231911054. [PMID: 36232359 PMCID: PMC9570204 DOI: 10.3390/ijms231911054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 11/30/2022] Open
Abstract
Since the discovery of striatal neurons expressing dopamine-synthesizing enzymes, researchers have attempted to identify their phenotype and functional significance. In this study, it was shown that in transgenic mice expressing green fluorescent protein (GFP) under the tyrosine hydroxylase (TH) gene promoter, (i) there are striatal neurons expressing only TH, only aromatic L-amino acid decarboxylase (AADC), or both enzymes of dopamine synthesis; (ii) striatal neurons expressing dopamine-synthesizing enzymes are not dopaminergic since they lack a dopamine transporter; (iii) monoenzymatic neurons expressing individual complementary dopamine-synthesizing enzymes produce this neurotransmitter in cooperation; (iv) striatal nerve fibers containing only TH, only AADC, or both enzymes project into the lateral ventricles, providing delivery pathways for L-3,4-dihydroxyphenylalanine and dopamine to the cerebrospinal fluid; and (v) striatal GFP neurons express receptor genes for various signaling molecules, i.e., classical neurotransmitters, neuropeptides, and steroids, indicating fine regulation of these neurons. Based on our data, it is assumed that the synthesis of dopamine by striatal neurons is a compensatory response to the death of nigral dopaminergic neurons in Parkinson’s disease, which opens broad prospects for the development of a fundamentally novel antiparkinsonian therapy.
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Siller A, Hofer NT, Tomagra G, Burkert N, Hess S, Benkert J, Gaifullina A, Spaich D, Duda J, Poetschke C, Vilusic K, Fritz EM, Schneider T, Kloppenburg P, Liss B, Carabelli V, Carbone E, Ortner NJ, Striessnig J. β2-subunit alternative splicing stabilizes Cav2.3 Ca 2+ channel activity during continuous midbrain dopamine neuron-like activity. eLife 2022; 11:e67464. [PMID: 35792082 PMCID: PMC9307272 DOI: 10.7554/elife.67464] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
In dopaminergic (DA) Substantia nigra (SN) neurons Cav2.3 R-type Ca2+-currents contribute to somatodendritic Ca2+-oscillations. This activity may contribute to the selective degeneration of these neurons in Parkinson's disease (PD) since Cav2.3-knockout is neuroprotective in a PD mouse model. Here, we show that in tsA-201-cells the membrane-anchored β2-splice variants β2a and β2e are required to stabilize Cav2.3 gating properties allowing sustained Cav2.3 availability during simulated pacemaking and enhanced Ca2+-currents during bursts. We confirmed the expression of β2a- and β2e-subunit transcripts in the mouse SN and in identified SN DA neurons. Patch-clamp recordings of mouse DA midbrain neurons in culture and SN DA neurons in brain slices revealed SNX-482-sensitive R-type Ca2+-currents with voltage-dependent gating properties that suggest modulation by β2a- and/or β2e-subunits. Thus, β-subunit alternative splicing may prevent a fraction of Cav2.3 channels from inactivation in continuously active, highly vulnerable SN DA neurons, thereby also supporting Ca2+ signals contributing to the (patho)physiological role of Cav2.3 channels in PD.
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Affiliation(s)
- Anita Siller
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Nadja T Hofer
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Giulia Tomagra
- Department of Drug Science, NIS Centre, University of TorinoTorinoItaly
| | - Nicole Burkert
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | - Simon Hess
- Institute for Zoology, Biocenter, University of CologneCologneGermany
| | - Julia Benkert
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | - Aisylu Gaifullina
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | - Desiree Spaich
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | - Johanna Duda
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | | | - Kristina Vilusic
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Eva Maria Fritz
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Toni Schneider
- Institute of Neurophysiology, University of CologneCologneGermany
| | - Peter Kloppenburg
- Institute for Zoology, Biocenter, University of CologneCologneGermany
| | - Birgit Liss
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
- Linacre College & New College, University of OxfordOxfordUnited Kingdom
| | | | - Emilio Carbone
- Department of Drug Science, NIS Centre, University of TorinoTorinoItaly
| | - Nadine Jasmin Ortner
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Jörg Striessnig
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
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Jamieson BB, Piet R. Kisspeptin neuron electrophysiology: Intrinsic properties, hormonal modulation, and regulation of homeostatic circuits. Front Neuroendocrinol 2022; 66:101006. [PMID: 35640722 DOI: 10.1016/j.yfrne.2022.101006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 05/05/2022] [Accepted: 05/19/2022] [Indexed: 11/04/2022]
Abstract
The obligatory role of kisspeptin (KISS1) and its receptor (KISS1R) in regulating the hypothalamic-pituitary-gonadal axis, puberty and fertility was uncovered in 2003. In the few years that followed, an impressive body of work undertaken in many species established that neurons producing kisspeptin orchestrate gonadotropin-releasing hormone (GnRH) neuron activity and subsequent GnRH and gonadotropin hormone secretory patterns, through kisspeptin-KISS1R signaling, and mediate many aspects of gonadal steroid hormone feedback regulation of GnRH neurons. Here, we review knowledge accrued over the past decade, mainly in genetically modified mouse models, of the electrophysiological properties of kisspeptin neurons and their regulation by hormonal feedback. We also discuss recent progress in our understanding of the role of these cells within neuronal circuits that control GnRH neuron activity and GnRH secretion, energy balance and, potentially, other homeostatic and reproductive functions.
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Affiliation(s)
| | - Richard Piet
- Brain Health Research Institute and Department of Biological Sciences, Kent State University, Kent, OH, USA.
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9
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Lmx1a-Dependent Activation of miR-204/211 Controls the Timing of Nurr1-Mediated Dopaminergic Differentiation. Int J Mol Sci 2022; 23:ijms23136961. [PMID: 35805964 PMCID: PMC9266978 DOI: 10.3390/ijms23136961] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 06/15/2022] [Accepted: 06/21/2022] [Indexed: 02/01/2023] Open
Abstract
The development of midbrain dopaminergic (DA) neurons requires a fine temporal and spatial regulation of a very specific gene expression program. Here, we report that during mouse brain development, the microRNA (miR-) 204/211 is present at a high level in a subset of DA precursors expressing the transcription factor Lmx1a, an early determinant for DA-commitment, but not in more mature neurons expressing Th or Pitx3. By combining different in vitro model systems of DA differentiation, we show that the levels of Lmx1a influence the expression of miR-204/211. Using published transcriptomic data, we found a significant enrichment of miR-204/211 target genes in midbrain dopaminergic neurons where Lmx1a was selectively deleted at embryonic stages. We further demonstrated that miR-204/211 controls the timing of the DA differentiation by directly downregulating the expression of Nurr1, a late DA differentiation master gene. Thus, our data indicate the Lmx1a-miR-204/211-Nurr1 axis as a key component in the cascade of events that ultimately lead to mature midbrain dopaminergic neurons differentiation and point to miR-204/211 as the molecular switch regulating the timing of Nurr1 expression.
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Extracellular Matrix Biomimetic Hydrogels, Encapsulated with Stromal Cell-Derived Factor 1, Improve the Composition of Foetal Tissue Grafts in a Rodent Model of Parkinson's Disease. Int J Mol Sci 2022; 23:ijms23094646. [PMID: 35563037 PMCID: PMC9101815 DOI: 10.3390/ijms23094646] [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: 03/19/2022] [Revised: 04/12/2022] [Accepted: 04/18/2022] [Indexed: 02/05/2023] Open
Abstract
Clinical studies have provided evidence for dopamine (DA) cell replacement therapy in Parkinson’s Disease. However, grafts derived from foetal tissue or pluripotent stem cells (PSCs) remain heterogeneous, with a high proportion of non-dopaminergic cells, and display subthreshold reinnervation of target tissues, thereby highlighting the need to identify new strategies to improve graft outcomes. In recent work, Stromal Cell-Derived Factor-1 (SDF1), secreted from meninges, has been shown to exert many roles during ventral midbrain DA development and DA-directed differentiation of PSCs. Related, co-implantation of meningeal cells has been shown to improve neural graft outcomes, however, no direct evidence for the role of SDF1 in neural grafting has been shown. Due to the rapid degradation of SDF1 protein, here, we utilised a hydrogel to entrap the protein and sustain its delivery at the transplant site to assess the impact on DA progenitor differentiation, survival and plasticity. Hydrogels were fabricated from self-assembling peptides (SAP), presenting an epitope for laminin, the brain’s main extracellular matrix protein, thereby providing cell adhesive support for the grafts and additional laminin–integrin signalling to influence cell fate. We show that SDF1 functionalised SAP hydrogels resulted in larger grafts, containing more DA neurons, increased A9 DA specification (the subpopulation of DA neurons responsible for motor function) and enhanced innervation. These findings demonstrate the capacity for functionalised, tissue-specific hydrogels to improve the composition of grafts targeted for neural repair.
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Better Outcomes with Intranigral versus Intrastriatal Cell Transplantation: Relevance for Parkinson’s Disease. Cells 2022; 11:cells11071191. [PMID: 35406755 PMCID: PMC8997951 DOI: 10.3390/cells11071191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/26/2022] [Accepted: 03/29/2022] [Indexed: 11/16/2022] Open
Abstract
Intrastriatal embryonic ventral mesencephalon grafts have been shown to integrate, survive, and reinnervate the host striatum in clinical settings and in animal models of Parkinson’s disease. However, this ectopic location does not restore the physiological loops of the nigrostriatal pathway and promotes only moderate behavioral benefits. Here, we performed a direct comparison of the potential benefits of intranigral versus intrastriatal grafts in animal models of Parkinson’s disease. We report that intranigral grafts promoted better survival of dopaminergic neurons and that only intranigral grafts induced recovery of fine motor skills and normalized cortico-striatal responses. The increase in the number of toxic activated glial cells in host tissue surrounding the intrastriatal graft, as well as within the graft, may be one of the causes of the increased cell death observed in the intrastriatal graft. Homotopic localization of the graft and the subsequent physiological cell rewiring of the basal ganglia may be a key factor in successful and beneficial cell transplantation procedures.
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12
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Chou N, Shin H, Kim K, Chae U, Jang M, Jeong U, Hwang K, Yi B, Lee SE, Woo J, Cho Y, Lee C, Baker BJ, Oh S, Nam M, Choi N, Cho I. A Multimodal Multi-Shank Fluorescence Neural Probe for Cell-Type-Specific Electrophysiology in Multiple Regions across a Neural Circuit. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103564. [PMID: 34796701 PMCID: PMC8805556 DOI: 10.1002/advs.202103564] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/25/2021] [Indexed: 05/27/2023]
Abstract
Cell-type-specific, activity-dependent electrophysiology can allow in-depth analysis of functional connectivity inside complex neural circuits composed of various cell types. To date, optics-based fluorescence recording devices enable monitoring cell-type-specific activities. However, the monitoring is typically limited to a single brain region, and the temporal resolution is significantly low. Herein, a multimodal multi-shank fluorescence neural probe that allows cell-type-specific electrophysiology from multiple deep-brain regions at a high spatiotemporal resolution is presented. A photodiode and an electrode-array pair are monolithically integrated on each tip of a minimal-form-factor silicon device. Both fluorescence and electrical signals are successfully measured simultaneously in GCaMP6f expressing mice, and the cell type from sorted neural spikes is identified. The probe's capability of combined electro-optical recordings for cell-type-specific electrophysiology at multiple brain regions within a neural circuit is demonstrated. The new experimental paradigm to enable the precise investigation of functional connectivity inside and across complex neural circuits composed of various cell types is expected.
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Affiliation(s)
- Namsun Chou
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Hyogeun Shin
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Kanghwan Kim
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Uikyu Chae
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
- School of Electrical EngineeringKorea University145 Anam‐ro, Seongbuk‐guSeoul02841Republic of Korea
| | - Minsu Jang
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Ui‐Jin Jeong
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
- School of Electrical EngineeringKorea University145 Anam‐ro, Seongbuk‐guSeoul02841Republic of Korea
| | - Kyeong‐Seob Hwang
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
- School of Mechanical EngineeringYonsei University50 Yonsei‐ro, Seodaemun‐guSeoul03722Republic of Korea
| | - Bumjun Yi
- Center for Functional ConnectomicsBrain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Seung Eun Lee
- Virus Facility, Research Animal Resource CenterBrain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Jiwan Woo
- Center for Neuroscience, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Yakdol Cho
- Center for Neuroscience, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Changhyuk Lee
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Bradley J. Baker
- Center for Functional ConnectomicsBrain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Soo‐Jin Oh
- Center for Neuroscience, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Min‐Ho Nam
- Center for Neuroscience, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Nakwon Choi
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
- KU‐KIST Graduate School of Converging Science and TechnologyKorea University145 Anam‐ro, Seongbuk‐guSeoul02841Republic of Korea
- Division of Bio‐Medical Science and Technology, KIST SchoolKorea University of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
| | - Il‐Joo Cho
- Center for BioMicrosystems, Brain Science InstituteKorea Institute of Science and Technology5, Hwarang‐ro 14‐gil, Seongbuk‐guSeoul02792Republic of Korea
- School of Electrical and Electronics EngineeringYonsei University50 Yonsei‐ro, Seodaemun‐guSeoul03722Republic of Korea
- Yonsei‐KIST Convergence Research InstituteYonsei University50 Yonsei‐ro, Seodaemun‐guSeoul03722Republic of Korea
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13
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Capsoni S, Fogli Iseppe A, Casciano F, Pignatelli A. Unraveling the Role of Dopaminergic and Calretinin Interneurons in the Olfactory Bulb. Front Neural Circuits 2021; 15:718221. [PMID: 34690707 PMCID: PMC8531203 DOI: 10.3389/fncir.2021.718221] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 08/31/2021] [Indexed: 11/27/2022] Open
Abstract
The perception and discriminating of odors are sensory activities that are an integral part of our daily life. The first brain region where odors are processed is the olfactory bulb (OB). Among the different cell populations that make up this brain area, interneurons play an essential role in this sensory activity. Moreover, probably because of their activity, they represent an exception compared to other parts of the brain, since OB interneurons are continuously generated in the postnatal and adult period. In this review, we will focus on periglomerular (PG) cells which are a class of interneurons found in the glomerular layer of the OB. These interneurons can be classified into distinct subtypes based on their neurochemical nature, based on the neurotransmitter and calcium-binding proteins expressed by these cells. Dopaminergic (DA) periglomerular cells and calretinin (CR) cells are among the newly generated interneurons and play an important role in the physiology of OB. In the OB, DA cells are involved in the processing of odors and the adaptation of the bulbar network to external conditions. The main role of DA cells in OB appears to be the inhibition of glutamate release from olfactory sensory fibers. Calretinin cells are probably the best morphologically characterized interneurons among PG cells in OB, but little is known about their function except for their inhibitory effect on noisy random excitatory signals arriving at the main neurons. In this review, we will mainly describe the electrophysiological properties related to the excitability profiles of DA and CR cells, with a particular view on the differences that characterize DA mature interneurons from cells in different stages of adult neurogenesis.
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Affiliation(s)
- Simona Capsoni
- Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy
- Bio@SNS Laboratory of Biology, Scuola Normale Superiore, Pisa, Italy
| | - Alex Fogli Iseppe
- Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy
| | - Fabio Casciano
- Department of Translational Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
- Interdepartmental Research Centre for the Study of Multiple Sclerosis and Inflammatory and Degenerative Diseases of the Nervous System, University of Ferrara, Ferrara, Italy
| | - Angela Pignatelli
- Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy
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14
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Huang M, Li D, Cheng X, Pei Q, Xie Z, Gu H, Zhang X, Chen Z, Liu A, Wang Y, Sun F, Li Y, Zhang J, He M, Xie Y, Zhang F, Qi X, Shang C, Cao P. The tectonigral pathway regulates appetitive locomotion in predatory hunting in mice. Nat Commun 2021; 12:4409. [PMID: 34285209 PMCID: PMC8292483 DOI: 10.1038/s41467-021-24696-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 07/01/2021] [Indexed: 02/06/2023] Open
Abstract
Appetitive locomotion is essential for animals to approach rewards, such as food and prey. The neuronal circuitry controlling appetitive locomotion is unclear. In a goal-directed behavior-predatory hunting, we show an excitatory brain circuit from the superior colliculus (SC) to the substantia nigra pars compacta (SNc) to enhance appetitive locomotion in mice. This tectonigral pathway transmits locomotion-speed signals to dopamine neurons and triggers dopamine release in the dorsal striatum. Synaptic inactivation of this pathway impairs appetitive locomotion but not defensive locomotion. Conversely, activation of this pathway increases the speed and frequency of approach during predatory hunting, an effect that depends on the activities of SNc dopamine neurons. Together, these data reveal that the SC regulates locomotion-speed signals to SNc dopamine neurons to enhance appetitive locomotion in mice.
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Affiliation(s)
- Meizhu Huang
- grid.508040.9Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, China
| | - Dapeng Li
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
| | - Xinyu Cheng
- grid.506261.60000 0001 0706 7839Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China ,grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China
| | - Qing Pei
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China
| | - Zhiyong Xie
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China
| | - Huating Gu
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China
| | - Xuerong Zhang
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China
| | - Zijun Chen
- grid.9227.e0000000119573309State Key Laboratory of Brain and Cognitive Sciences, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Aixue Liu
- grid.506261.60000 0001 0706 7839Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China ,grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China
| | - Yi Wang
- grid.9227.e0000000119573309State Key Laboratory of Brain and Cognitive Sciences, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Fangmiao Sun
- grid.11135.370000 0001 2256 9319College of Life Sciences, Peking University, Beijing, China
| | - Yulong Li
- grid.11135.370000 0001 2256 9319College of Life Sciences, Peking University, Beijing, China
| | - Jiayi Zhang
- grid.8547.e0000 0001 0125 2443State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Miao He
- grid.8547.e0000 0001 0125 2443State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Yuan Xie
- grid.256883.20000 0004 1760 8442Key Laboratory of Neural and Vascular Biology in Ministry of Education, Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei China
| | - Fan Zhang
- grid.256883.20000 0004 1760 8442Key Laboratory of Neural and Vascular Biology in Ministry of Education, Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei China
| | - Xiangbing Qi
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China ,grid.12527.330000 0001 0662 3178Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, China
| | - Congping Shang
- grid.508040.9Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, China
| | - Peng Cao
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China ,grid.12527.330000 0001 0662 3178Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, China
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15
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Kramer DJ, Aisenberg EE, Kosillo P, Friedmann D, Stafford DA, Lee AYF, Luo L, Hockemeyer D, Ngai J, Bateup HS. Generation of a DAT-P2A-Flpo mouse line for intersectional genetic targeting of dopamine neuron subpopulations. Cell Rep 2021; 35:109123. [PMID: 33979604 PMCID: PMC8240967 DOI: 10.1016/j.celrep.2021.109123] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 02/10/2021] [Accepted: 04/22/2021] [Indexed: 02/06/2023] Open
Abstract
Dopaminergic projections exert widespread influence over multiple brain regions and modulate various behaviors including movement, reward learning, and motivation. It is increasingly appreciated that dopamine neurons are heterogeneous in their gene expression, circuitry, physiology, and function. Current approaches to target dopamine neurons are largely based on single gene drivers, which either label all dopamine neurons or mark a subset but concurrently label non-dopaminergic neurons. Here, we establish a mouse line with Flpo recombinase expressed from the endogenous Slc6a3 (dopamine active transporter [DAT]) locus. DAT-P2A-Flpo mice can be used together with Cre-expressing mouse lines to efficiently and selectively label dopaminergic subpopulations using Cre/Flp-dependent intersectional strategies. We demonstrate the utility of this approach by generating DAT-P2A-Flpo;NEX-Cre mice that specifically label Neurod6-expressing dopamine neurons, which project to the nucleus accumbens medial shell. DAT-P2A-Flpo mice add to a growing toolbox of genetic resources that will help parse the diverse functions mediated by dopaminergic circuits. Kramer et al. generate a DAT-P2A-Flpo mouse line that enables intersectional genetic targeting of dopamine neuron subpopulations using Flp/Cre-dependent constructs. They show that ventral tegmental area dopamine neurons expressing Neurod6 give rise to the majority of dopaminergic projections to the nucleus accumbens medial shell and olfactory tubercle.
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Affiliation(s)
- Daniel J Kramer
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Erin E Aisenberg
- Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Polina Kosillo
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Drew Friedmann
- Howard Hughes Medical Institute and Department of Biology, Stanford University, Stanford, CA 94305, USA
| | - David A Stafford
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Angus Yiu-Fai Lee
- Cancer Research Laboratory, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Liqun Luo
- Howard Hughes Medical Institute and Department of Biology, Stanford University, Stanford, CA 94305, USA
| | - Dirk Hockemeyer
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA; Chan Zuckerberg Biohub, San Francisco, CA 94158, USA; Innovative Genomics Institute, University of California, Berkeley, CA 94720, USA
| | - John Ngai
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA; Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Helen S Bateup
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA; Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA 94720, USA; Chan Zuckerberg Biohub, San Francisco, CA 94158, USA.
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16
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Miranda-Barrientos J, Chambers I, Mongia S, Liu B, Wang HL, Mateo-Semidey GE, Margolis EB, Zhang S, Morales M. Ventral tegmental area GABA, glutamate, and glutamate-GABA neurons are heterogeneous in their electrophysiological and pharmacological properties. Eur J Neurosci 2021; 54:10.1111/ejn.15156. [PMID: 33619763 PMCID: PMC8380271 DOI: 10.1111/ejn.15156] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 02/16/2021] [Accepted: 02/16/2021] [Indexed: 01/05/2023]
Abstract
The ventral tegmental area (VTA) contains dopamine neurons intermixed with GABA-releasing (expressing vesicular GABA transporter, VGaT), glutamate-releasing (expressing vesicular glutamate transporter 2, VGluT2), and glutamate-GABA co-releasing (co-expressing VGluT2 and VGaT) neurons. By delivering INTRSECT viral vectors into the VTA of double vglut2-Cre/vgat-Flp transgenic mice, we targeted specific VTA cell populations for ex vivo recordings. We found that VGluT2+ VGaT- and VGluT2+ VGaT+ neurons on average had relatively hyperpolarized resting membrane potential, greater rheobase, and lower spontaneous firing frequency compared to VGluT2- VGaT+ neurons, suggesting that VTA glutamate-releasing and glutamate-GABA co-releasing neurons require stronger excitatory drive to fire than GABA-releasing neurons. In addition, we detected expression of Oprm1mRNA (encoding µ opioid receptors, MOR) in VGluT2+ VGaT- and VGluT2- VGaT+ neurons, and that the MOR agonist DAMGO hyperpolarized neurons with these phenotypes. Collectively, we demonstrate the utility of the double transgenic mouse to access VTA glutamate, glutamate-GABA, and GABA neurons to determine their electrophysiological properties. SIGNIFICANT STATEMENT: Some physiological properties of VTA glutamate-releasing and glutamate-GABA co-releasing neurons are distinct from those of VTA GABA-releasing neurons. µ-opioid receptor activation hyperpolarizes some VTA glutamate-releasing and some GABA-releasing neurons.
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Affiliation(s)
| | - Ian Chambers
- Integrative Neuroscience Research Branch, National Institute on Drug Abuse, Baltimore, MD, USA
| | - Smriti Mongia
- Integrative Neuroscience Research Branch, National Institute on Drug Abuse, Baltimore, MD, USA
| | - Bing Liu
- Integrative Neuroscience Research Branch, National Institute on Drug Abuse, Baltimore, MD, USA
| | - Hui-Ling Wang
- Integrative Neuroscience Research Branch, National Institute on Drug Abuse, Baltimore, MD, USA
| | | | - Elyssa B. Margolis
- UCSF Weill Institute of Neurosciences|Department of Neurology, University of California, San Francisco, CA, USA
| | - Shiliang Zhang
- Confocal and Electron Microscopy Core, National Institute on Drug Abuse, Baltimore, MD, USA
| | - Marisela Morales
- Integrative Neuroscience Research Branch, National Institute on Drug Abuse, Baltimore, MD, USA
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17
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Enhanced Retrieval of Taste Associative Memory by Chemogenetic Activation of Locus Coeruleus Norepinephrine Neurons. J Neurosci 2020; 40:8367-8385. [PMID: 32994339 DOI: 10.1523/jneurosci.1720-20.2020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 08/28/2020] [Accepted: 09/21/2020] [Indexed: 01/08/2023] Open
Abstract
The ability of animals to retrieve memories stored in response to the environment is essential for behavioral adaptation. Norepinephrine (NE)-containing neurons in the brain play a key role in the modulation of synaptic plasticity underlying various processes of memory formation. However, the role of the central NE system in memory retrieval remains unclear. Here, we developed a novel chemogenetic activation strategy exploiting insect olfactory ionotropic receptors (IRs), termed "IR-mediated neuronal activation," and used it for selective stimulation of NE neurons in the locus coeruleus (LC). Drosophila melanogaster IR84a and IR8a subunits were expressed in LC NE neurons in transgenic mice. Application of phenylacetic acid (a specific ligand for the IR84a/IR8a complex) at appropriate doses induced excitatory responses of NE neurons expressing the receptors in both slice preparations and in vivo electrophysiological conditions, resulting in a marked increase of NE release in the LC nerve terminal regions (male and female). Ligand-induced activation of LC NE neurons enhanced the retrieval process of conditioned taste aversion without affecting taste sensitivity, general arousal state, and locomotor activity. This enhancing effect on taste memory retrieval was mediated, in part, through α1- and β-adrenergic receptors in the basolateral nucleus of the amygdala (BLA; male). Pharmacological inhibition of LC NE neurons confirmed the facilitative role of these neurons in memory retrieval via adrenergic receptors in the BLA (male). Our findings indicate that the LC NE system, through projections to the BLA, controls the retrieval process of taste associative memory.SIGNIFICANCE STATEMENT Norepinephrine (NE)-containing neurons in the brain play a key role in the modulation of synaptic plasticity underlying various processes of memory formation, but the role of the NE system in memory retrieval remains unclear. We developed a chemogenetic activation system based on insect olfactory ionotropic receptors and used it for selective stimulation of NE neurons in the locus coeruleus (LC) in transgenic mice. Ligand-induced activation of LC NE neurons enhanced the retrieval of conditioned taste aversion, which was mediated, in part, through adrenoceptors in the basolateral amygdala. Pharmacological blockade of LC activity confirmed the facilitative role of these neurons in memory retrieval. Our findings indicate that the LC-amygdala pathway plays an important role in the recall of taste associative memory.
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18
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A new mouse tool for studying dopaminergic neurons. J Neurosci Methods 2020; 347:108968. [PMID: 33039413 DOI: 10.1016/j.jneumeth.2020.108968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 10/06/2020] [Accepted: 10/06/2020] [Indexed: 11/21/2022]
Abstract
Dopaminergic neurons play important roles in brain function and studying dopaminergic system has been a major field of neuroscience research. Genetically modified mice have greatly advanced research of dopaminergic neurons. However, it has been shown that dopaminergic neurons contain several subtypes expressing distinct genetic markers, and it is challenging to study genetically different subtypes of dopaminergic neurons using current mouse lines. Here, we report a newly developed Dat-ires-flp line, in which flippase gene is knocked in after the stop codon of Slc6a3 (dopamine transporter, DAT) gene. We validated this line to show that flp is specifically expressed in dopaminergic neurons, and by breeding with Cre-expressing line (i.e. Vglut2-cre) we can study a specific subpopulation of dopaminergic neurons. We expect this line will be widely used to study different subtypes of dopaminergic neurons in diverse contexts.
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19
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Butkovich LM, Houser MC, Chalermpalanupap T, Porter-Stransky KA, Iannitelli AF, Boles JS, Lloyd GM, Coomes AS, Eidson LN, De Sousa Rodrigues ME, Oliver DL, Kelly SD, Chang J, Bengoa-Vergniory N, Wade-Martins R, Giasson BI, Joers V, Weinshenker D, Tansey MG. Transgenic Mice Expressing Human α-Synuclein in Noradrenergic Neurons Develop Locus Ceruleus Pathology and Nonmotor Features of Parkinson's Disease. J Neurosci 2020; 40:7559-7576. [PMID: 32868457 PMCID: PMC7511194 DOI: 10.1523/jneurosci.1468-19.2020] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/02/2020] [Accepted: 08/09/2020] [Indexed: 12/11/2022] Open
Abstract
Degeneration of locus ceruleus (LC) neurons and dysregulation of noradrenergic signaling are ubiquitous features of Parkinson's disease (PD). The LC is among the first brain regions affected by α-synuclein (asyn) pathology, yet how asyn affects these neurons remains unclear. LC-derived norepinephrine (NE) can stimulate neuroprotective mechanisms and modulate immune cells, while dysregulation of NE neurotransmission may exacerbate disease progression, particularly nonmotor symptoms, and contribute to the chronic neuroinflammation associated with PD pathology. Although transgenic mice overexpressing asyn have previously been developed, transgene expression is usually driven by pan-neuronal promoters and thus has not been selectively targeted to LC neurons. Here we report a novel transgenic mouse expressing human wild-type asyn under control of the noradrenergic-specific dopamine β-hydroxylase promoter (DBH-hSNCA). These mice developed oligomeric and conformation-specific asyn in LC neurons, alterations in hippocampal and LC microglial abundance, upregulated GFAP expression, degeneration of LC fibers, decreased striatal DA metabolism, and age-dependent behaviors reminiscent of nonmotor symptoms of PD that were rescued by adrenergic receptor antagonists. These mice provide novel insights into how asyn pathology affects LC neurons and how central noradrenergic dysfunction may contribute to early PD pathophysiology.SIGNIFICANCE STATEMENT ɑ-Synuclein (asyn) pathology and loss of neurons in the locus ceruleus (LC) are two of the most ubiquitous neuropathologic features of Parkinson's disease (PD). Dysregulated norepinephrine (NE) neurotransmission is associated with the nonmotor symptoms of PD, including sleep disturbances, emotional changes such as anxiety and depression, and cognitive decline. Importantly, the loss of central NE may contribute to the chronic inflammation in, and progression of, PD. We have generated a novel transgenic mouse expressing human asyn in LC neurons to investigate how increased asyn expression affects the function of the central noradrenergic transmission and associated behaviors. We report cytotoxic effects of oligomeric and conformation-specific asyn, astrogliosis, LC fiber degeneration, disruptions in striatal dopamine metabolism, and age-dependent alterations in nonmotor behaviors without inclusions.
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Affiliation(s)
| | | | - Termpanit Chalermpalanupap
- Laney Graduate School, Emory University, Atlanta, Georgia 30322
- Department of Human Genetics, Emory School of Medicine, Atlanta, Georgia 30322
| | - Kirsten A Porter-Stransky
- Department of Human Genetics, Emory School of Medicine, Atlanta, Georgia 30322
- Department of Biomedical Sciences, Homer Stryker M.D. School of Medicine, Western Michigan University, Kalamazoo, Michigan 49008
| | - Alexa F Iannitelli
- Department of Human Genetics, Emory School of Medicine, Atlanta, Georgia 30322
| | - Jake S Boles
- Department of Neuroscience and Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - Grace M Lloyd
- Department of Neuroscience and Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - Alexandra S Coomes
- Department of Neuroscience and Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - Lori N Eidson
- Department of Physiology, Emory School of Medicine, Atlanta, Georgia 30322
| | | | | | - Sean D Kelly
- Laney Graduate School, Emory University, Atlanta, Georgia 30322
| | - Jianjun Chang
- Laney Graduate School, Emory University, Atlanta, Georgia 30322
| | - Nora Bengoa-Vergniory
- Oxford Parkinson's Disease Centre, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3QX, United Kingdom
| | - Richard Wade-Martins
- Oxford Parkinson's Disease Centre, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3QX, United Kingdom
| | - Benoit I Giasson
- Department of Neuroscience and Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - Valerie Joers
- Department of Neuroscience and Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - David Weinshenker
- Department of Human Genetics, Emory School of Medicine, Atlanta, Georgia 30322
| | - Malú Gámez Tansey
- Department of Neuroscience and Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
- Susan and Normal Fixel Chair in Parkinson's Disease, Normal Fixel Institute for Neurological Diseases, University of Florida Health, Gainesville, Florida 32610
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20
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Surkov SA, Mingazov ER, Blokhin VE, Sturova AI, Gretskaya NM, Zinchenko GN, Bezuglov VV, Ugrumov MV. The Neuroprotective Effect of N-Docosahexaenoyldopamine on Degenerating Dopaminergic Neurons of the Mesencephalon. BIOL BULL+ 2020. [DOI: 10.1134/s1062359020050106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Steinberg EE, Gore F, Heifets BD, Taylor MD, Norville ZC, Beier KT, Földy C, Lerner TN, Luo L, Deisseroth K, Malenka RC. Amygdala-Midbrain Connections Modulate Appetitive and Aversive Learning. Neuron 2020; 106:1026-1043.e9. [PMID: 32294466 DOI: 10.1016/j.neuron.2020.03.016] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 02/03/2020] [Accepted: 03/18/2020] [Indexed: 01/28/2023]
Abstract
The central amygdala (CeA) orchestrates adaptive responses to emotional events. While CeA substrates for defensive behaviors have been studied extensively, CeA circuits for appetitive behaviors and their relationship to threat-responsive circuits remain poorly defined. Here, we demonstrate that the CeA sends robust inhibitory projections to the lateral substantia nigra (SNL) that contribute to appetitive and aversive learning in mice. CeA→SNL neural responses to appetitive and aversive stimuli were modulated by expectation and magnitude consistent with a population-level salience signal, which was required for Pavlovian conditioned reward-seeking and defensive behaviors. CeA→SNL terminal activation elicited reinforcement when linked to voluntary actions but failed to support Pavlovian associations that rely on incentive value signals. Consistent with a disinhibitory mechanism, CeA inputs preferentially target SNL GABA neurons, and CeA→SNL and SNL dopamine neurons respond similarly to salient stimuli. Collectively, our results suggest that amygdala-nigra interactions represent a previously unappreciated mechanism for influencing emotional behaviors.
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Affiliation(s)
- Elizabeth E Steinberg
- Nancy Pritzker Laboratory, Department of Psychiatry & Behavioral Sciences, Stanford University, Stanford, CA 94305, USA
| | - Felicity Gore
- Nancy Pritzker Laboratory, Department of Psychiatry & Behavioral Sciences, Stanford University, Stanford, CA 94305, USA; Departments of Bioengineering and Psychiatry and Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA
| | - Boris D Heifets
- Nancy Pritzker Laboratory, Department of Psychiatry & Behavioral Sciences, Stanford University, Stanford, CA 94305, USA; Department of Anesthesiology, Stanford University, Stanford, CA 94305, USA
| | - Madison D Taylor
- Nancy Pritzker Laboratory, Department of Psychiatry & Behavioral Sciences, Stanford University, Stanford, CA 94305, USA
| | - Zane C Norville
- Nancy Pritzker Laboratory, Department of Psychiatry & Behavioral Sciences, Stanford University, Stanford, CA 94305, USA
| | - Kevin T Beier
- Nancy Pritzker Laboratory, Department of Psychiatry & Behavioral Sciences, Stanford University, Stanford, CA 94305, USA; Department of Biology and Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA
| | - Csaba Földy
- Nancy Pritzker Laboratory, Department of Psychiatry & Behavioral Sciences, Stanford University, Stanford, CA 94305, USA; Brain Research Institute, University of Zurich, Zurich, Switzerland
| | - Talia N Lerner
- Departments of Bioengineering and Psychiatry and Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA
| | - Liqun Luo
- Department of Biology and Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA
| | - Karl Deisseroth
- Departments of Bioengineering and Psychiatry and Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA
| | - Robert C Malenka
- Nancy Pritzker Laboratory, Department of Psychiatry & Behavioral Sciences, Stanford University, Stanford, CA 94305, USA.
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22
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Kosaka T, Pignatelli A, Kosaka K. Heterogeneity of tyrosine hydroxylase expressing neurons in the main olfactory bulb of the mouse. Neurosci Res 2019; 157:15-33. [PMID: 31629793 DOI: 10.1016/j.neures.2019.10.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 09/29/2019] [Accepted: 10/04/2019] [Indexed: 10/25/2022]
Abstract
The structural features of dopamine (DA)-GABAergic neurons in the mouse main olfactory bulbs were examined, using both wild type and transgenic TH-GFP mice, with the combination of several methods; the immunocytochemistry, biotinylated dextran amine labeling, lucifer yellow injection in fixed slices, biocytin injection in live slice and the functional olfactory deprivation. DA-GABAergic neurons were clustered in the glomerular layer (GL) but they also scattered in other layers. DA-GABAergic juxtaglomerular neurons, were classified into 5 groups based on their structural features and named as follows: 1) Large periglomerular (LPG) cells with tuft-like glomerular dendritic branches and apparent axons extending to the distant glomeruli, which correspond to the " inhibitory juxtaglomerular association (IJGA) neurons" participating in the interglomerular association system. 2) Small periglomerular (SPG) cells including both axonic and anaxonic ones; the axonic SPG cells might correspond to the classical periglomerular cells. 3) Transglomerular cells extending dendritic processes spanning 2 or more glomeruli. 4) Incrusting cells extending their dendritic branches mainly in the periphery of the glomeruli. 5) Other various neurons not-yet classified. In the layers other than the GL various types of TH expressing neurons were scattered; some of them extended dendritic processes into the GL.
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Affiliation(s)
- Toshio Kosaka
- Department of Medical Science Technology, Faculty of Health and Welfare Sciences in Fukuoka, International University of Health and Welfare, 137-1 Enokizu, Okawa City, Fukuoka 831-8501, Japan.
| | - Angela Pignatelli
- Department of Biomedical and Specialty Surgical Sciences, Physiology Section, University of Ferrara, Via Borsari 46, Ferrara, Italy
| | - Katsuko Kosaka
- Department of Physical Therapy, Fukuoka International University of Health and Welfare, 3-6-40 Momochihama, Sawara-ku, Fukuoka 814-0001, Japan
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23
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Arttamangkul S, Plazek A, Platt EJ, Jin H, Murray TF, Birdsong WT, Rice KC, Farrens DL, Williams JT. Visualizing endogenous opioid receptors in living neurons using ligand-directed chemistry. eLife 2019; 8:49319. [PMID: 31589142 PMCID: PMC6809603 DOI: 10.7554/elife.49319] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 10/06/2019] [Indexed: 12/11/2022] Open
Abstract
Identifying neurons that have functional opioid receptors is fundamental for the understanding of the cellular, synaptic and systems actions of opioids. Current techniques are limited to post hoc analyses of fixed tissues. Here we developed a fluorescent probe, naltrexamine-acylimidazole (NAI), to label opioid receptors based on a chemical approach termed ‘traceless affinity labeling’. In this approach, a high affinity antagonist naltrexamine is used as the guide molecule for a transferring reaction of acylimidazole at the receptor. This reaction generates a fluorescent dye covalently linked to the receptor while naltrexamine is liberated and leaves the binding site. The labeling induced by this reagent allowed visualization of opioid-sensitive neurons in rat and mouse brains without loss of function of the fluorescently labeled receptors. The ability to locate endogenous receptors in living tissues will aid considerably in establishing the distribution and physiological role of opioid receptors in the CNS of wild type animals.
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Affiliation(s)
- Seksiri Arttamangkul
- The Vollum Institute, Oregon Health & Science University, Portland, United States
| | - Andrew Plazek
- Medicinal Chemistry Core, Oregon Health & Science University, Portland, United States
| | - Emily J Platt
- Department of Biochemistry and Molecular Biology, School of Medicine, Oregon Health & Science University, Portland, United States
| | - Haihong Jin
- Medicinal Chemistry Core, Oregon Health & Science University, Portland, United States
| | - Thomas F Murray
- Department of Pharmacology, School of Medicine, Creighton University, Omaha, United States
| | - William T Birdsong
- The Vollum Institute, Oregon Health & Science University, Portland, United States
| | - Kenner C Rice
- Drug Design and Synthesis Section, Intramural Research Program, NIDA and NIAAA, Bethesda, United States
| | - David L Farrens
- Department of Biochemistry and Molecular Biology, School of Medicine, Oregon Health & Science University, Portland, United States
| | - John T Williams
- The Vollum Institute, Oregon Health & Science University, Portland, United States
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24
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The undeveloped properties of GABA neurons in the ventral tegmental area promote energy intake for growth in juvenile rats. Sci Rep 2019; 9:11848. [PMID: 31413349 PMCID: PMC6694191 DOI: 10.1038/s41598-019-48336-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 08/02/2019] [Indexed: 12/12/2022] Open
Abstract
Juvenile animals show higher energy intake (EI) per body weight (BW) to meet the energy requirements for growth. However, the underlying mechanisms that induce high EI/BW in juvenile animals remain unknown. The EI from a control diet (CD) and high fat diet (HFD), as well as BW changes were compared between juvenile (3 weeks old) and adult (8 weeks old) rats. BW gain and EI were increased in the HFD-fed adult rats compared to the CD-fed adult rats. However, in the juvenile rats, there were no differences in BW gain and EI between the CD-fed and HFD-fed groups. The locomotor activity was significantly increased in HFD group compared with the CD group in juvenile, but not in adult rats. Gamma-aminobutyric acid (GABA) neurons in the VTA were found to remain undeveloped with less GABAergic input into dopamine neurons in the juvenile rats. The deletion of the VTA GABA neurons in the adult rats significantly increased CD consumption, but showed almost no change in HFD consumption. These data suggest that undeveloped properties of VTA GABA neurons in juvenile rats can promote higher EI regardless of high or less palatable feeding, and contribute to growth promotion.
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25
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Sarma SN, Nagano R, Ohsako S. Tyroxine Hydroxylase-Positive Neuronal Cell Population is Increased by Temporal Dioxin Exposure at Early Stage of Differentiation from Human Embryonic Stem Cells. Int J Mol Sci 2019; 20:ijms20112687. [PMID: 31159217 PMCID: PMC6600215 DOI: 10.3390/ijms20112687] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 12/31/2022] Open
Abstract
Background: The neurological effects of short-term dioxin exposure during the fetal period is an important health risk in humans. Here, we investigated the effects of dioxin on neural differentiation using human embryonic stem cells (hESCs) to evaluate human susceptibility to dioxin. Methods: Using an enzymatic bulk passage, neural differentiation from human ESCs was carried out. 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) was added to various stages of culture. The expression levels of the neuronal markers microtubule-associated protein 2 (MAP2) and thyroxine hydroxylase (TH) were measured by RT-qPCR and image analysis of immunostaining. Results: Although early-stage neuronal cells are quite resistant to TCDD, the numbers of neural rosettes and increases in mRNA expression levels and the number of cells positive for MAP2 and TH were significant by temporal exposure at embryoid body stage (Day9-exposure group). In contrast, the TCDD exposures against ESCs (Day0-exposure group) and differentiated neural cells (Day35-exposure group) were not affected at all. The increment was similarly observed by continuous exposure of TCDD from Day9 through Day60. Conclusions: These results indicated that dioxin exposure during the early stage of differentiation from hESCs increases the contents of neuronal cells, especially TH-positive neuronal cells. Regulations of aryl hydrocarbon receptor (AHR) signaling in an early stage of embryogenesis should be investigated extensively to understand the mechanism underlying the increase in neuronal cell populations and to apply the knowledge to regenerative medicine.
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Affiliation(s)
- Sailendra Nath Sarma
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Reiko Nagano
- Earth-Life Science Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
| | - Seiichiroh Ohsako
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
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26
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Tomagra G, Picollo F, Battiato A, Picconi B, De Marchis S, Pasquarelli A, Olivero P, Marcantoni A, Calabresi P, Carbone E, Carabelli V. Quantal Release of Dopamine and Action Potential Firing Detected in Midbrain Neurons by Multifunctional Diamond-Based Microarrays. Front Neurosci 2019; 13:288. [PMID: 31024230 PMCID: PMC6465646 DOI: 10.3389/fnins.2019.00288] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 03/11/2019] [Indexed: 12/20/2022] Open
Abstract
Micro-Graphitic Single Crystal Diamond Multi Electrode Arrays (μG-SCD-MEAs) have so far been used as amperometric sensors to detect catecholamines from chromaffin cells and adrenal gland slices. Besides having time resolution and sensitivity that are comparable with carbon fiber electrodes, that represent the gold standard for amperometry, μG-SCD-MEAs also have the advantages of simultaneous multisite detection, high biocompatibility and implementation of amperometric/potentiometric protocols, aimed at monitoring exocytotic events and neuronal excitability. In order to adapt diamond technology to record neuronal activity, the μG-SCD-MEAs in this work have been interfaced with cultured midbrain neurons to detect electrical activity as well as quantal release of dopamine (DA). μG-SCD-MEAs are based on graphitic sensing electrodes that are embedded into the diamond matrix and are fabricated using MeV ion beam lithography. Two geometries have been adopted, with 4 × 4 and 8 × 8 microelectrodes (20 μm × 3.5 μm exposed area, 200 μm spacing). In the amperometric configuration, the 4 × 4 μG-SCD-MEAs resolved quantal exocytosis from midbrain dopaminergic neurons. KCl-stimulated DA release occurred as amperometric spikes of 15 pA amplitude and 0.5 ms half-width, at a mean frequency of 0.4 Hz. When used as potentiometric multiarrays, the 8 × 8 μG-SCD-MEAs detected the spontaneous firing activity of midbrain neurons. Extracellularly recorded action potentials (APs) had mean amplitude of ∼-50 μV and occurred at a mean firing frequency of 0.7 Hz in 67% of neurons, while the remaining fired at 6.8 Hz. Comparable findings were observed using conventional MEAs (0.9 and 6.4 Hz, respectively). To test the reliability of potentiometric recordings with μG-SCD-MEAs, the D2-autoreceptor modulation of firing was investigated by applying levodopa (L-DOPA, 20 μM), and comparing μG-SCD-MEAs, conventional MEAs and current-clamp recordings. In all cases, L-DOPA reduced the spontaneous spiking activity in most neurons by 70%, while the D2-antagonist sulpiride reversed this effect. Cell firing inhibition was generally associated with increased APs amplitude. A minority of neurons was either insensitive to, or potentiated by L-DOPA, suggesting that AP recordings originate from different midbrain neuronal subpopulations and reveal different modulatory pathways. Our data demonstrate, for the first time, that μG-SCD-MEAs are multi-functional biosensors suitable to resolve real-time DA release and AP firing in in vitro neuronal networks.
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Affiliation(s)
- Giulia Tomagra
- Department of Drug and Science Technology and "NIS" Inter-departmental Centre, University of Torino, Turin, Italy
| | - Federico Picollo
- Department of Physics and "NIS" Inter-departmental Centre, University of Torino, Turin, Italy.,Istituto Nazionale di Fisica Nucleare - Sezione di Torino, Turin, Italy
| | - Alfio Battiato
- Istituto Nazionale di Fisica Nucleare - Sezione di Torino, Turin, Italy
| | - Barbara Picconi
- Experimental Neurophysiology Laboratory, IRCCS San Raffaele Pisana, University San Raffaele, Rome, Italy.,University San Raffaele, Rome, Italy
| | - Silvia De Marchis
- Department of Life Sciences and Systems Biology and "NICO" Neuroscience Institute Cavalieri Ottolenghi, University of Torino, Turin, Italy
| | | | - Paolo Olivero
- Department of Physics and "NIS" Inter-departmental Centre, University of Torino, Turin, Italy.,Istituto Nazionale di Fisica Nucleare - Sezione di Torino, Turin, Italy
| | - Andrea Marcantoni
- Department of Drug and Science Technology and "NIS" Inter-departmental Centre, University of Torino, Turin, Italy
| | - Paolo Calabresi
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Emilio Carbone
- Department of Drug and Science Technology and "NIS" Inter-departmental Centre, University of Torino, Turin, Italy
| | - Valentina Carabelli
- Department of Drug and Science Technology and "NIS" Inter-departmental Centre, University of Torino, Turin, Italy
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27
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Gendron J, Colace-Sauty C, Beaume N, Cartonnet H, Guegan J, Ulveling D, Pardanaud-Glavieux C, Moszer I, Cheval H, Ravassard P. Long non-coding RNA repertoire and open chromatin regions constitute midbrain dopaminergic neuron - specific molecular signatures. Sci Rep 2019; 9:1409. [PMID: 30723217 PMCID: PMC6363776 DOI: 10.1038/s41598-018-37872-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 12/12/2018] [Indexed: 01/24/2023] Open
Abstract
Midbrain dopaminergic (DA) neurons are involved in diverse neurological functions, including control of movements, emotions or reward. In turn, their dysfunctions cause severe clinical manifestations in humans, such as the appearance of motor and cognitive symptoms in Parkinson’s Disease. The physiology and pathophysiology of these neurons are widely studied, mostly with respect to molecular mechanisms implicating protein-coding genes. In contrast, the contribution of non-coding elements of the genome to DA neuron function is poorly investigated. In this study, we isolated DA neurons from E14.5 ventral mesencephalons in mice, and used RNA-seq and ATAC-seq to establish and describe repertoires of long non-coding RNAs (lncRNAs) and putative DNA regulatory regions specific to this neuronal population. We identified 1,294 lncRNAs constituting the repertoire of DA neurons, among which 939 were novel. Most of them were not found in hindbrain serotonergic (5-HT) neurons, indicating a high degree of cell-specificity. This feature was also observed regarding open chromatin regions, as 39% of the ATAC-seq peaks from the DA repertoire were not detected in the 5-HT neurons. Our work provides for the first time DA-specific catalogues of non-coding elements of the genome that will undoubtedly participate in deepening our knowledge regarding DA neuronal development and dysfunctions.
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Affiliation(s)
- J Gendron
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France
| | - C Colace-Sauty
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France
| | - N Beaume
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France
| | - H Cartonnet
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France
| | - J Guegan
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France
| | - D Ulveling
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France
| | - C Pardanaud-Glavieux
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France
| | - I Moszer
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France
| | - H Cheval
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France.
| | - P Ravassard
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, F-75013, Paris, France.
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28
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Puerarin promoted proliferation and differentiation of dopamine-producing cells in Parkinson’s animal models. Biomed Pharmacother 2018; 106:1236-1242. [DOI: 10.1016/j.biopha.2018.07.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 07/08/2018] [Accepted: 07/10/2018] [Indexed: 11/19/2022] Open
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29
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Tapia M, Baudot P, Formisano-Tréziny C, Dufour MA, Temporal S, Lasserre M, Marquèze-Pouey B, Gabert J, Kobayashi K, Goaillard JM. Neurotransmitter identity and electrophysiological phenotype are genetically coupled in midbrain dopaminergic neurons. Sci Rep 2018; 8:13637. [PMID: 30206240 PMCID: PMC6134142 DOI: 10.1038/s41598-018-31765-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 08/22/2018] [Indexed: 01/04/2023] Open
Abstract
Most neuronal types have a well-identified electrical phenotype. It is now admitted that a same phenotype can be produced using multiple biophysical solutions defined by ion channel expression levels. This argues that systems-level approaches are necessary to understand electrical phenotype genesis and stability. Midbrain dopaminergic (DA) neurons, although quite heterogeneous, exhibit a characteristic electrical phenotype. However, the quantitative genetic principles underlying this conserved phenotype remain unknown. Here we investigated the quantitative relationships between ion channels’ gene expression levels in midbrain DA neurons using single-cell microfluidic qPCR. Using multivariate mutual information analysis to decipher high-dimensional statistical dependences, we unravel co-varying gene modules that link neurotransmitter identity and electrical phenotype. We also identify new segregating gene modules underlying the diversity of this neuronal population. We propose that the newly identified genetic coupling between neurotransmitter identity and ion channels may play a homeostatic role in maintaining the electrophysiological phenotype of midbrain DA neurons.
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Affiliation(s)
- Mónica Tapia
- Unité de Neurobiologie des Canaux Ioniques et de la Synapse, INSERM UMR 1072, Aix Marseille Université, 13015, Marseille, France
| | - Pierre Baudot
- Unité de Neurobiologie des Canaux Ioniques et de la Synapse, INSERM UMR 1072, Aix Marseille Université, 13015, Marseille, France
| | - Christine Formisano-Tréziny
- Unité de Neurobiologie des Canaux Ioniques et de la Synapse, INSERM UMR 1072, Aix Marseille Université, 13015, Marseille, France
| | - Martial A Dufour
- Unité de Neurobiologie des Canaux Ioniques et de la Synapse, INSERM UMR 1072, Aix Marseille Université, 13015, Marseille, France
| | - Simone Temporal
- Unité de Neurobiologie des Canaux Ioniques et de la Synapse, INSERM UMR 1072, Aix Marseille Université, 13015, Marseille, France
| | - Manon Lasserre
- Unité de Neurobiologie des Canaux Ioniques et de la Synapse, INSERM UMR 1072, Aix Marseille Université, 13015, Marseille, France
| | - Béatrice Marquèze-Pouey
- Unité de Neurobiologie des Canaux Ioniques et de la Synapse, INSERM UMR 1072, Aix Marseille Université, 13015, Marseille, France
| | - Jean Gabert
- Unité de Neurobiologie des Canaux Ioniques et de la Synapse, INSERM UMR 1072, Aix Marseille Université, 13015, Marseille, France.,Département de Biochimie et Biologie Moléculaire, Hôpital Nord, Marseille, France
| | - Kazuto Kobayashi
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University, Fukushima, 960-1295, Japan
| | - Jean-Marc Goaillard
- Unité de Neurobiologie des Canaux Ioniques et de la Synapse, INSERM UMR 1072, Aix Marseille Université, 13015, Marseille, France.
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30
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Histamine H 3 Receptors Decrease Dopamine Release in the Ventral Striatum by Reducing the Activity of Striatal Cholinergic Interneurons. Neuroscience 2018; 376:188-203. [DOI: 10.1016/j.neuroscience.2018.01.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 12/18/2017] [Accepted: 01/13/2018] [Indexed: 01/01/2023]
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31
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Bera K, Das AK, Rakshit A, Sarkar B, Rawat A, Maity BK, Maiti S. Fluorogenic Detection of Monoamine Neurotransmitters in Live Cells. ACS Chem Neurosci 2018; 9:469-474. [PMID: 29226666 DOI: 10.1021/acschemneuro.7b00391] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Monoamine neurotransmission is key to neuromodulation, but imaging monoamines in live neurons has remained a challenge. Here we show that externally added ortho-phthalaldehyde (OPA) can permeate live cells and form bright fluorogenic adducts with intracellular monoamines (e.g., serotonin, dopamine, and norepinephrine) and with L-DOPA, which can be imaged sensitively using conventional single-photon excitation in a fluorescence microscope. The peak excitation and emission wavelengths (λex = 401 nm and λem = 490 nm for serotonin; λex = 446 nm and λem = 557 nm for dopamine; and λex = 446 nm and λem = 544 nm for norepinephrine, respectively) are accessible to most modern confocal imaging instruments. The identity of monoamine containing structures (possibly neurotransmitter vesicles) in serotonergic RN46A cells is established by quasi-simultaneous imaging of serotonin using three-photon excitation microscopy. Mass spectrometry of cell extracts and of in vitro solutions helps us identify the chemical nature of the adducts and establishes the reaction mechanisms. Our method has low toxicity, high selectivity, and the ability to directly report the location and concentration of monoamines in live cells.
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Affiliation(s)
- Kallol Bera
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - Anand Kant Das
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - Ananya Rakshit
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - Bidyut Sarkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - Anoop Rawat
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - Barun Kumar Maity
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - Sudipta Maiti
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
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32
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De Gregorio R, Pulcrano S, De Sanctis C, Volpicelli F, Guatteo E, von Oerthel L, Latagliata EC, Esposito R, Piscitelli RM, Perrone-Capano C, Costa V, Greco D, Puglisi-Allegra S, Smidt MP, di Porzio U, Caiazzo M, Mercuri NB, Li M, Bellenchi GC. miR-34b/c Regulates Wnt1 and Enhances Mesencephalic Dopaminergic Neuron Differentiation. Stem Cell Reports 2018. [PMID: 29526736 PMCID: PMC5998209 DOI: 10.1016/j.stemcr.2018.02.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The differentiation of dopaminergic neurons requires concerted action of morphogens and transcription factors acting in a precise and well-defined time window. Very little is known about the potential role of microRNA in these events. By performing a microRNA-mRNA paired microarray screening, we identified miR-34b/c among the most upregulated microRNAs during dopaminergic differentiation. Interestingly, miR-34b/c modulates Wnt1 expression, promotes cell cycle exit, and induces dopaminergic differentiation. When combined with transcription factors ASCL1 and NURR1, miR-34b/c doubled the yield of transdifferentiated fibroblasts into dopaminergic neurons. Induced dopaminergic (iDA) cells synthesize dopamine and show spontaneous electrical activity, reversibly blocked by tetrodotoxin, consistent with the electrophysiological properties featured by brain dopaminergic neurons. Our findings point to a role for miR-34b/c in neuronal commitment and highlight the potential of exploiting its synergy with key transcription factors in enhancing in vitro generation of dopaminergic neurons. miR-34b/c is enriched in Pitx3-GFP+ mDA neurons miR-34b/c targets Wnt1-3′ UTR miR-34b/c is expressed during dopaminergic differentiation of mESCs miR-34b/c enhances fibroblast transdifferentiation into functional iDA neurons
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Affiliation(s)
- Roberto De Gregorio
- Institute of Genetics and Biophysics, "Adriano Buzzati Traverso", CNR, 80131 Naples, Italy
| | - Salvatore Pulcrano
- Institute of Genetics and Biophysics, "Adriano Buzzati Traverso", CNR, 80131 Naples, Italy; Deparment of Pharmacy, University of Naples Federico II, 80131 Naples, Italy
| | - Claudia De Sanctis
- Institute of Genetics and Biophysics, "Adriano Buzzati Traverso", CNR, 80131 Naples, Italy; Neuromed IRCCS, 86077 Pozzilli (IS), Italy
| | - Floriana Volpicelli
- Institute of Genetics and Biophysics, "Adriano Buzzati Traverso", CNR, 80131 Naples, Italy; Deparment of Pharmacy, University of Naples Federico II, 80131 Naples, Italy
| | - Ezia Guatteo
- Fondazione Santa Lucia IRCCS, 00143 Rome, Italy; Parthenope University, Department of Motor Science and Wellness, 80133 Naples, Italy
| | - Lars von Oerthel
- Swammerdam Institute for Life Sciences, University of Amsterdam, 1090 GE Amsterdam, the Netherlands
| | | | - Roberta Esposito
- Institute of Genetics and Biophysics, "Adriano Buzzati Traverso", CNR, 80131 Naples, Italy
| | - Rosa Maria Piscitelli
- Fondazione Santa Lucia IRCCS, 00143 Rome, Italy; Parthenope University, Department of Motor Science and Wellness, 80133 Naples, Italy
| | - Carla Perrone-Capano
- Institute of Genetics and Biophysics, "Adriano Buzzati Traverso", CNR, 80131 Naples, Italy; Deparment of Pharmacy, University of Naples Federico II, 80131 Naples, Italy
| | - Valerio Costa
- Institute of Genetics and Biophysics, "Adriano Buzzati Traverso", CNR, 80131 Naples, Italy
| | - Dario Greco
- Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
| | | | - Marten P Smidt
- Swammerdam Institute for Life Sciences, University of Amsterdam, 1090 GE Amsterdam, the Netherlands
| | - Umberto di Porzio
- Institute of Genetics and Biophysics, "Adriano Buzzati Traverso", CNR, 80131 Naples, Italy
| | - Massimiliano Caiazzo
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, 3584 CG Utrecht, the Netherlands
| | - Nicola Biagio Mercuri
- Fondazione Santa Lucia IRCCS, 00143 Rome, Italy; University of Tor Vergata, Department of Systems Medicine, 00133 Rome, Italy
| | - Meng Li
- Neuroscience and Mental Health Research Institute, School of Medicine and School of Bioscience, Cardiff University, Cardiff CF24 4HQ, UK
| | - Gian Carlo Bellenchi
- Institute of Genetics and Biophysics, "Adriano Buzzati Traverso", CNR, 80131 Naples, Italy.
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Winner BM, Zhang H, Farthing MM, Karchalla LM, Lookingland KJ, Goudreau JL. Metabolism of Dopamine in Nucleus Accumbens Astrocytes Is Preserved in Aged Mice Exposed to MPTP. Front Aging Neurosci 2017; 9:410. [PMID: 29311899 PMCID: PMC5732926 DOI: 10.3389/fnagi.2017.00410] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 11/27/2017] [Indexed: 01/05/2023] Open
Abstract
Parkinson disease (PD) is prevalent in elderly individuals and is characterized by selective degeneration of nigrostriatal dopamine (NSDA) neurons. Interestingly, not all dopamine (DA) neurons are affected equally by PD and aging, particularly mesolimbic (ML) DA neurons. Here, effects of aging were examined on presynaptic DA synthesis, reuptake, metabolism and neurotoxicant susceptibility of NSDA and mesolimbic dopamine (MLDA) neurons and astrocyte DA metabolism. There were no differences in phenotypic markers of DA synthesis, reuptake or metabolism in NSDA or MLDA neurons in aged mice, but MLDA neurons displayed lower DA stores. Astrocyte metabolism of DA to 3-methoxytyramine (3-MT) in the striatum was decreased in aged mice, but was maintained in the nucleus accumbens. Despite diminished DA vesicular storage capacity in MLDA neurons, susceptibility to acute neurotoxicant exposure was similar in young and aged mice. These results reveal an age- and neurotoxicant-induced impairment of DA metabolic activity in astrocytes surrounding susceptible NSDA neurons as opposed to maintenance of DA metabolism in astrocytes surrounding resistant MLDA neurons, and suggest a possible therapeutic target for PD.
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Affiliation(s)
- Brittany M Winner
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States.,Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States
| | - Harue Zhang
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States
| | - McKenzie M Farthing
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States
| | - Lalitha M Karchalla
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States
| | - Keith J Lookingland
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States.,Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States.,College of Osteopathic Medicine, Michigan State University, East Lansing, MI, United States
| | - John L Goudreau
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States.,Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States.,College of Osteopathic Medicine, Michigan State University, East Lansing, MI, United States.,Department of Neurology and Ophthalmology, Michigan State University, East Lansing, MI, United States
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Using minimalist self‐assembling peptides as hierarchical scaffolds to stabilise growth factors and promote stem cell integration in the injured brain. J Tissue Eng Regen Med 2017; 12:e1571-e1579. [DOI: 10.1002/term.2582] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 09/18/2017] [Accepted: 09/23/2017] [Indexed: 12/16/2022]
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35
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Lieberman OJ, Choi SJ, Kanter E, Saverchenko A, Frier MD, Fiore GM, Wu M, Kondapalli J, Zampese E, Surmeier DJ, Sulzer D, Mosharov EV. α-Synuclein-Dependent Calcium Entry Underlies Differential Sensitivity of Cultured SN and VTA Dopaminergic Neurons to a Parkinsonian Neurotoxin. eNeuro 2017; 4:ENEURO.0167-17.2017. [PMID: 29177188 PMCID: PMC5701296 DOI: 10.1523/eneuro.0167-17.2017] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 11/01/2017] [Accepted: 11/09/2017] [Indexed: 12/27/2022] Open
Abstract
Parkinson's disease (PD) is a debilitating neurodegenerative disease characterized by a loss of dopaminergic neurons in the substantia nigra (SN). Although mitochondrial dysfunction and dysregulated α-synuclein (aSyn) expression are postulated to play a role in PD pathogenesis, it is still debated why neurons of the SN are targeted while neighboring dopaminergic neurons of the ventral tegmental area (VTA) are spared. Using electrochemical and imaging approaches, we investigated metabolic changes in cultured primary mouse midbrain dopaminergic neurons exposed to a parkinsonian neurotoxin, 1-methyl-4-phenylpyridinium (MPP+). We demonstrate that the higher level of neurotoxicity in SN than VTA neurons was due to SN neuron-specific toxin-induced increase in cytosolic dopamine (DA) and Ca2+, followed by an elevation of mitochondrial Ca2+, activation of nitric oxide synthase (NOS), and mitochondrial oxidation. The increase in cytosolic Ca2+ was not caused by MPP+-induced oxidative stress, but rather depended on the activity of both L-type calcium channels and aSyn expression, suggesting that these two established pathogenic factors in PD act in concert.
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Affiliation(s)
- Ori J. Lieberman
- New York State Psychiatric Institute, Columbia University Medical Center, New York, NY 10032
- Department of Psychiatry, Columbia University Medical Center, New York, NY 10032
- Department of Neurology, Columbia University Medical Center, New York, NY 10032
| | - Se Joon Choi
- New York State Psychiatric Institute, Columbia University Medical Center, New York, NY 10032
- Department of Psychiatry, Columbia University Medical Center, New York, NY 10032
- Department of Neurology, Columbia University Medical Center, New York, NY 10032
| | - Ellen Kanter
- New York State Psychiatric Institute, Columbia University Medical Center, New York, NY 10032
- Department of Psychiatry, Columbia University Medical Center, New York, NY 10032
- Department of Neurology, Columbia University Medical Center, New York, NY 10032
| | - Anastasia Saverchenko
- New York State Psychiatric Institute, Columbia University Medical Center, New York, NY 10032
- Department of Psychiatry, Columbia University Medical Center, New York, NY 10032
- Department of Neurology, Columbia University Medical Center, New York, NY 10032
| | - Micah D. Frier
- New York State Psychiatric Institute, Columbia University Medical Center, New York, NY 10032
- Department of Psychiatry, Columbia University Medical Center, New York, NY 10032
- Department of Neurology, Columbia University Medical Center, New York, NY 10032
| | - Giulia M. Fiore
- New York State Psychiatric Institute, Columbia University Medical Center, New York, NY 10032
- Department of Psychiatry, Columbia University Medical Center, New York, NY 10032
- Department of Neurology, Columbia University Medical Center, New York, NY 10032
| | - Min Wu
- New York State Psychiatric Institute, Columbia University Medical Center, New York, NY 10032
- Department of Psychiatry, Columbia University Medical Center, New York, NY 10032
- Department of Neurology, Columbia University Medical Center, New York, NY 10032
| | - Jyothisri Kondapalli
- Department of Physiology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Enrico Zampese
- Department of Physiology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - D. James Surmeier
- Department of Physiology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - David Sulzer
- New York State Psychiatric Institute, Columbia University Medical Center, New York, NY 10032
- Department of Psychiatry, Columbia University Medical Center, New York, NY 10032
- Department of Neurology, Columbia University Medical Center, New York, NY 10032
- Department of Pharmacology, Columbia University Medical Center, New York, NY 10032
| | - Eugene V. Mosharov
- New York State Psychiatric Institute, Columbia University Medical Center, New York, NY 10032
- Department of Psychiatry, Columbia University Medical Center, New York, NY 10032
- Department of Neurology, Columbia University Medical Center, New York, NY 10032
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36
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Carter DA, Choong YT, Connelly AA, Bassi JK, Hunter NO, Thongsepee N, Llewellyn-Smith IJ, Fong AY, McDougall SJ, Allen AM. Functional and neurochemical characterization of angiotensin type 1A receptor-expressing neurons in the nucleus of the solitary tract of the mouse. Am J Physiol Regul Integr Comp Physiol 2017; 313:R438-R449. [PMID: 28701322 DOI: 10.1152/ajpregu.00168.2017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 07/10/2017] [Accepted: 07/10/2017] [Indexed: 11/22/2022]
Abstract
Angiotensin II acts via two main receptors within the central nervous system, with the type 1A receptor (AT1AR) most widely expressed in adult neurons. Activation of the AT1R in the nucleus of the solitary tract (NTS), the principal nucleus receiving central synapses of viscerosensory afferents, modulates cardiovascular reflexes. Expression of the AT1R occurs in high density within the NTS of most mammals, including humans, but the fundamental electrophysiological and neurochemical characteristics of the AT1AR-expressing NTS neurons are not known. To address this, we have used a transgenic mouse, in which the AT1AR promoter drives expression of green fluorescent protein (GFP). Approximately one-third of AT1AR-expressing neurons express the catecholamine-synthetic enzyme tyrosine hydroxylase (TH), and a subpopulation of these stained for the transcription factor paired-like homeobox 2b (Phox2b). A third group, comprising approximately two-thirds of the AT1AR-expressing NTS neurons, showed Phox2b immunoreactivity alone. A fourth group in the ventral subnucleus expressed neither TH nor Phox2b. In whole cell recordings from slices in vitro, AT1AR-GFP neurons exhibited voltage-activated potassium currents, including the transient outward current and the M-type potassium current. In two different mouse strains, both AT1AR-GFP neurons and TH-GFP neurons showed similar AT1AR-mediated depolarizing responses to superfusion with angiotensin II. These data provide a comprehensive description of AT1AR-expressing neurons in the NTS and increase our understanding of the complex actions of this neuropeptide in the modulation of viscerosensory processing.
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Affiliation(s)
- D A Carter
- Department of Physiology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Y-T Choong
- Department of Physiology, The University of Melbourne, Melbourne, Victoria, Australia
| | - A A Connelly
- Department of Physiology, The University of Melbourne, Melbourne, Victoria, Australia
| | - J K Bassi
- Department of Physiology, The University of Melbourne, Melbourne, Victoria, Australia
| | - N O Hunter
- Department of Physiology, The University of Melbourne, Melbourne, Victoria, Australia
| | - N Thongsepee
- Department of Physiology, The University of Melbourne, Melbourne, Victoria, Australia
| | - I J Llewellyn-Smith
- Cardiovascular Medicine and Human Physiology, School of Medicine, Flinders University, Bedford Park, South Australia, Australia; and
| | - A Y Fong
- Department of Physiology, The University of Melbourne, Melbourne, Victoria, Australia
| | - S J McDougall
- Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - A M Allen
- Department of Physiology, The University of Melbourne, Melbourne, Victoria, Australia; .,Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Melbourne, Victoria, Australia
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37
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Niclis JC, Gantner CW, Hunt CPJ, Kauhausen JA, Durnall JC, Haynes JM, Pouton CW, Parish CL, Thompson LH. A PITX3-EGFP Reporter Line Reveals Connectivity of Dopamine and Non-dopamine Neuronal Subtypes in Grafts Generated from Human Embryonic Stem Cells. Stem Cell Reports 2017; 9:868-882. [PMID: 28867345 PMCID: PMC5599268 DOI: 10.1016/j.stemcr.2017.08.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 08/03/2017] [Accepted: 08/04/2017] [Indexed: 12/24/2022] Open
Abstract
Development of safe and effective stem cell-based therapies for brain repair requires an in-depth understanding of the in vivo properties of neural grafts generated from human stem cells. Replacing dopamine neurons in Parkinson's disease remains one of the most anticipated applications. Here, we have used a human PITX3-EGFP embryonic stem cell line to characterize the connectivity of stem cell-derived midbrain dopamine neurons in the dopamine-depleted host brain with an unprecedented level of specificity. The results show that the major A9 and A10 subclasses of implanted dopamine neurons innervate multiple, developmentally appropriate host targets but also that the majority of graft-derived connectivity is non-dopaminergic. These findings highlight the promise of stem cell-based procedures for anatomically correct reconstruction of specific neuronal pathways but also emphasize the scope for further refinement in order to limit the inclusion of uncharacterized and potentially unwanted cell types.
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Affiliation(s)
- Jonathan C Niclis
- Florey Institute of Neuroscience and Mental Health, Royal Parade, Parkville, VIC 3010, Australia
| | - Carlos W Gantner
- Florey Institute of Neuroscience and Mental Health, Royal Parade, Parkville, VIC 3010, Australia
| | - Cameron P J Hunt
- Florey Institute of Neuroscience and Mental Health, Royal Parade, Parkville, VIC 3010, Australia; Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Jessica A Kauhausen
- Florey Institute of Neuroscience and Mental Health, Royal Parade, Parkville, VIC 3010, Australia
| | - Jennifer C Durnall
- Florey Institute of Neuroscience and Mental Health, Royal Parade, Parkville, VIC 3010, Australia
| | - John M Haynes
- Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Colin W Pouton
- Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Clare L Parish
- Florey Institute of Neuroscience and Mental Health, Royal Parade, Parkville, VIC 3010, Australia.
| | - Lachlan H Thompson
- Florey Institute of Neuroscience and Mental Health, Royal Parade, Parkville, VIC 3010, Australia.
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38
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Chalermpalanupap T, Weinshenker D, Rorabaugh JM. Down but Not Out: The Consequences of Pretangle Tau in the Locus Coeruleus. Neural Plast 2017; 2017:7829507. [PMID: 29038736 PMCID: PMC5605916 DOI: 10.1155/2017/7829507] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 06/20/2017] [Accepted: 07/20/2017] [Indexed: 12/12/2022] Open
Abstract
Degeneration of locus coeruleus (LC) is an underappreciated hallmark of Alzheimer's disease (AD). The LC is the main source of norepinephrine (NE) in the forebrain, and its degeneration is highly correlated with cognitive impairment and amyloid-beta (Aβ) and tangle pathology. Hyperphosphorylated tau in the LC is among the first detectable AD-like neuropathology in the brain, and while the LC/NE system impacts multiple aspects of AD (e.g., cognition, neuropathology, and neuroinflammation), the functional consequences of hyperphosphorylated tau accrual on LC neurons are not known. Recent evidence suggests that LC neurons accumulate aberrant tau species for decades before frank LC cell body degeneration occurs in AD, suggesting that a therapeutic window exists. In this review, we combine the literature on how pathogenic tau affects forebrain neurons with the known properties and degeneration patterns of LC neurons to synthesize hypotheses on hyperphosphorylated tau-induced dysfunction of LC neurons and the prion-like spread of pretangle tau from the LC to the forebrain. We also propose novel experiments using both in vitro and in vivo models to address the many questions surrounding the impact of hyperphosphorylated tau on LC neurons in AD and its role in disease progression.
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Affiliation(s)
| | - David Weinshenker
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Jacki M. Rorabaugh
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322, USA
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39
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Homophilic binding of the neural cell adhesion molecule CHL1 regulates development of ventral midbrain dopaminergic pathways. Sci Rep 2017; 7:9368. [PMID: 28839197 PMCID: PMC5570898 DOI: 10.1038/s41598-017-09599-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 07/26/2017] [Indexed: 11/09/2022] Open
Abstract
Abnormal development of ventral midbrain (VM) dopaminergic (DA) pathways, essential for motor and cognitive function, may underpin a number of neurological disorders and thereby highlight the importance of understanding the birth and connectivity of the associated neurons. While a number of regulators of VM DA neurogenesis are known, processes involved in later developmental events, including terminal differentiation and axon morphogenesis, are less well understood. Recent transcriptional analysis studies of the developing VM identified genes expressed during these stages, including the cell adhesion molecule with homology to L1 (Chl1). Here, we map the temporal and spatial expression of CHL1 and assess functional roles of substrate-bound and soluble-forms of the protein during VM DA development. Results showed early CHL1 in the VM, corresponding with roles in DA progenitor migration and differentiation. Subsequently, we demonstrated roles for CHL1 in both axonal extension and repulsion, selectively of DA neurons, suggestive of a role in guidance towards forebrain targets and away from hindbrain nuclei. In part, CHL1 mediates these roles through homophilic CHL1-CHL1 interactions. Collectively, these findings enhance our knowledge of VM DA pathways development, and may provide new insights into understanding DA developmental conditions such as autism spectrum disorders.
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40
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Zhao Z, Wang L, Gao W, Hu F, Zhang J, Ren Y, Lin R, Feng Q, Cheng M, Ju D, Chi Q, Wang D, Song S, Luo M, Zhan C. A Central Catecholaminergic Circuit Controls Blood Glucose Levels during Stress. Neuron 2017. [PMID: 28625488 DOI: 10.1016/j.neuron.2017.05.031] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Stress-induced hyperglycemia is a fundamental adaptive response that mobilizes energy stores in response to threats. Here, our examination of the contributions of the central catecholaminergic (CA) neuronal system to this adaptive response revealed that CA neurons in the ventrolateral medulla (VLM) control stress-induced hyperglycemia. Ablation of VLM CA neurons abolished the hyperglycemic response to both physical and psychological stress, whereas chemogenetic activation of these neurons was sufficient to induce hyperglycemia. We further found that CA neurons in the rostral VLM, but not those in the caudal VLM, cause hyperglycemia via descending projections to the spinal cord. Monosynaptic tracing experiments showed that VLM CA neurons receive direct inputs from multiple stress-responsive brain areas. Optogenetic studies identified an excitatory PVN-VLM circuit that induces hyperglycemia. This study establishes the central role of VLM CA neurons in stress-induced hyperglycemia and substantially expands our understanding of the central mechanism that controls glucose metabolism.
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Affiliation(s)
- Zhe Zhao
- National Institute of Biological Sciences, Beijing, 102206, China
| | - Liang Wang
- National Institute of Biological Sciences, Beijing, 102206, China
| | - Wenling Gao
- National Institute of Biological Sciences, Beijing, 102206, China
| | - Fei Hu
- National Institute of Biological Sciences, Beijing, 102206, China
| | - Juen Zhang
- National Institute of Biological Sciences, Beijing, 102206, China
| | - Yuqi Ren
- National Institute of Biological Sciences, Beijing, 102206, China; PTN Graduate Program, School of Life Sciences, Peking University, Beijing 100081, China
| | - Rui Lin
- National Institute of Biological Sciences, Beijing, 102206, China; PTN Graduate Program, School of Life Sciences, Peking University, Beijing 100081, China
| | - Qiru Feng
- National Institute of Biological Sciences, Beijing, 102206, China; PTN Graduate Program, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Mingxiu Cheng
- Department of Biomedical Engineering, Center for Brain-inspired Computing Research, McGovern Institute for Brain Research, Tsinghua University, Beijing 100084, China
| | - Dapeng Ju
- National Institute of Biological Sciences, Beijing, 102206, China; College of Biological Science, China Agricultural University, Beijing, 100193, China
| | - Qingsheng Chi
- State Key Laboratory of Integrated Management for Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Dehua Wang
- State Key Laboratory of Integrated Management for Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Sen Song
- Department of Biomedical Engineering, Center for Brain-inspired Computing Research, McGovern Institute for Brain Research, Tsinghua University, Beijing 100084, China
| | - Minmin Luo
- National Institute of Biological Sciences, Beijing, 102206, China; School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Cheng Zhan
- National Institute of Biological Sciences, Beijing, 102206, China.
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41
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Joost S, Kobayashi K, Wree A, Haas SJP. Optimisation of murine organotypic slice culture preparation for a novel sagittal-frontal co-culture system. J Neurosci Methods 2017; 285:49-57. [DOI: 10.1016/j.jneumeth.2017.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 04/21/2017] [Accepted: 05/03/2017] [Indexed: 02/03/2023]
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42
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Rolland AS, Kareva T, Kholodilov N, Burke RE. A quantitative evaluation of a 2.5-kb rat tyrosine hydroxylase promoter to target expression in ventral mesencephalic dopamine neurons in vivo. Neuroscience 2017; 346:126-134. [PMID: 28108256 DOI: 10.1016/j.neuroscience.2017.01.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 12/15/2016] [Accepted: 01/09/2017] [Indexed: 01/08/2023]
Abstract
Adeno-associated viruses (AAVs) have become powerful tools in neuroscience for both basic research and potential therapeutic use. They have become especially important tools for optogenetic experiments based on their ability to achieve transgene expression in postmitotic neurons with regional selectivity. With the use of appropriate promoter elements they can achieve cellular specificity as well. One population of neurons that plays a central role in human neurodegenerative and psychiatric diseases are the dopamine neurons of the midbrain. To study these neurons in vivo with advanced techniques it would be highly advantageous to characterize an appropriate specific promoter. To this end we have characterized a 2.5-kb sequence of the rat tyrosine hydroxylase (TH) promoter. The rTHp(2.5) promoter induced expression of the fluorescent reporter protein mCherry in SN dopamine neurons. Although it showed excellent specificity in cortex and striatum, where no reporter expression was observed, in the SN region many neurons expressed reporter but not TH. We show that some of the TH negativity is due to the suppression of its expression by the transgene. We conclude that rTHp(2.5) does preferentially label dopamine neurons but its specificity is not complete within the substantia nigra and caution must be used.
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Affiliation(s)
- Anne-Sophie Rolland
- Department of Neurology, Columbia University, 650 W 168th Street, New York, NY 10032, USA
| | - Tatyana Kareva
- Department of Neurology, Columbia University, 650 W 168th Street, New York, NY 10032, USA
| | - Nikolai Kholodilov
- Department of Neurology, Columbia University, 650 W 168th Street, New York, NY 10032, USA
| | - Robert E Burke
- Department of Neurology, Columbia University, 650 W 168th Street, New York, NY 10032, USA; Department of Pathology and Cell Biology, Columbia University, 650 W 168th Street, New York, NY 10032, USA.
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Pignatelli A, Belluzzi O. Dopaminergic Neurones in the Main Olfactory Bulb: An Overview from an Electrophysiological Perspective. Front Neuroanat 2017; 11:7. [PMID: 28261065 PMCID: PMC5306133 DOI: 10.3389/fnana.2017.00007] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 02/02/2017] [Indexed: 02/03/2023] Open
Abstract
The olfactory bulb (OB), the first center processing olfactory information, is characterized by a vigorous life-long activity-dependent plasticity responsible for a variety of odor-evoked behavioral responses. It hosts the more numerous group of dopaminergic (DA) neurones in the central nervous system, cells strategically positioned at the entry of the bulbar circuitry, directly in contact with the olfactory nerve terminals, which play a key role in odor processing and in the adaptation of the bulbar network to external conditions. Here, we focus mainly on the electrophysiological properties of DA interneurones, reviewing findings concerning their excitability profiles in adulthood and in different phases of adult neurogenesis. We also discuss dynamic changes of the DA interneurones related to environmental stimuli and their possible functional implications.
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Affiliation(s)
- Angela Pignatelli
- Life Sciences and Biotechnology, University of Ferrara Ferrara, Italy
| | - Ottorino Belluzzi
- Life Sciences and Biotechnology, University of Ferrara Ferrara, Italy
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Chumarina M, Azevedo C, Bigarreau J, Vignon C, Kim KS, Li JY, Roybon L. Derivation of mouse embryonic stem cell lines from tyrosine hydroxylase reporter mice crossed with a human SNCA transgenic mouse model of Parkinson's disease. Stem Cell Res 2016; 19:17-20. [PMID: 28413000 PMCID: PMC5626016 DOI: 10.1016/j.scr.2016.12.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Accepted: 12/16/2016] [Indexed: 10/25/2022] Open
Abstract
Mouse embryonic stem cell (mESC) lines were derived by crossing heterozygous transgenic (tg) mice expressing green fluorescent protein (GFP) under the control of the rat tyrosine hydroxylase (TH) promoter, with homozygous alpha-synuclein (aSYN) mice expressing human mutant SNCAA53T under the control of the mouse Prion promoter (MoPrP), or wildtype (WT) mice. The expression of GFP and human aSYN was validated by immunocytochemistry in midbrain neuron cultures upon differentiation of mESC lines using stromal cell-derived inducing activity. These mESC lines can help to study the impact of human aSYN expression in neurons and oligodendrocytes, and also trace GFP-expressing midbrain neurons.
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Affiliation(s)
- Margarita Chumarina
- Cell Stem Cell Laboratory for CNS Disease Modeling, Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden; MultiPark and Lund Stem Cell Center, Lund University, 22184 Lund, Sweden
| | - Carla Azevedo
- Cell Stem Cell Laboratory for CNS Disease Modeling, Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden; MultiPark and Lund Stem Cell Center, Lund University, 22184 Lund, Sweden
| | - Julie Bigarreau
- Cell Stem Cell Laboratory for CNS Disease Modeling, Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
| | - Clémentine Vignon
- Cell Stem Cell Laboratory for CNS Disease Modeling, Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
| | - Kwang-Soo Kim
- Molecular Neurobiology Laboratory, Department of Psychiatry and Program in Neuroscience, McLean Hospital/Harvard Medical School, Belmont, MA 02478, USA; Harvard Stem Cell Institute, McLean Hospital/Harvard Medical School, Belmont, MA 02478, USA
| | - Jia-Yi Li
- Neural Plasticity and Repair Unit, Department of Experimental Medical Science, Wallenberg Neuroscience Center, Lund University, Lund, Sweden; Neuroscience Institute, College of Life and Health Sciences, Northeastern University, Shenyang, 110015, PR China
| | - Laurent Roybon
- Cell Stem Cell Laboratory for CNS Disease Modeling, Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden; MultiPark and Lund Stem Cell Center, Lund University, 22184 Lund, Sweden.
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Runegaard AH, Jensen KL, Fitzpatrick CM, Dencker D, Weikop P, Gether U, Rickhag M. Preserved dopaminergic homeostasis and dopamine-related behaviour in hemizygous TH-Cre mice. Eur J Neurosci 2016; 45:121-128. [PMID: 27453291 DOI: 10.1111/ejn.13347] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/14/2016] [Accepted: 07/18/2016] [Indexed: 02/06/2023]
Abstract
Cre-driver mouse lines have been extensively used as genetic tools to target and manipulate genetically defined neuronal populations by expression of Cre recombinase under selected gene promoters. This approach has greatly advanced neuroscience but interpretations are hampered by the fact that most Cre-driver lines have not been thoroughly characterized. Thus, a phenotypic characterization is of major importance to reveal potential aberrant phenotypes prior to implementation and usage to selectively inactivate or induce transgene expression. Here, we present a biochemical and behavioural assessment of the dopaminergic system in hemizygous tyrosine hydroxylase (TH)-Cre mice in comparison to wild-type (WT) controls. Our data show that TH-Cre mice display preserved dopaminergic homeostasis with unaltered levels of TH and dopamine as well as unaffected dopamine turnover in striatum. TH-Cre mice also show preserved dopamine transporter expression and function supporting sustained dopaminergic transmission. In addition, TH-Cre mice demonstrate normal responses in basic behavioural paradigms related to dopaminergic signalling including locomotor activity, reward preference and anxiolytic behaviour. Our results suggest that TH-Cre mice represent a valid tool to study the dopamine system, though careful characterization must always be performed to prevent false interpretations following Cre-dependent transgene expression and manipulation of selected neuronal pathways.
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Affiliation(s)
- Annika H Runegaard
- Molecular Neuropharmacology and Genetics Laboratory, Lundbeck Foundation Center for Biomembranes in Nanomedicine, Department of Neuroscience and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kathrine L Jensen
- Molecular Neuropharmacology and Genetics Laboratory, Lundbeck Foundation Center for Biomembranes in Nanomedicine, Department of Neuroscience and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ciarán M Fitzpatrick
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Ditte Dencker
- Laboratory of Neuropsychiatry, Psychiatric Center Copenhagen and Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Pia Weikop
- Laboratory of Neuropsychiatry, Psychiatric Center Copenhagen and Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Ulrik Gether
- Molecular Neuropharmacology and Genetics Laboratory, Lundbeck Foundation Center for Biomembranes in Nanomedicine, Department of Neuroscience and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mattias Rickhag
- Molecular Neuropharmacology and Genetics Laboratory, Lundbeck Foundation Center for Biomembranes in Nanomedicine, Department of Neuroscience and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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46
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Bifsha P, Balsalobre A, Drouin J. Specificity of Pitx3-Dependent Gene Regulatory Networks in Subsets of Midbrain Dopamine Neurons. Mol Neurobiol 2016; 54:4921-4935. [PMID: 27514757 DOI: 10.1007/s12035-016-0040-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 08/05/2016] [Indexed: 01/16/2023]
Abstract
Dysfunction of midbrain dopaminergic (mDA) neurons is involved in Parkinson's disease (PD) and neuropsychiatric disorders. Pitx3 is expressed in mDA neuron subsets of the substantia nigra compacta (SNc) and of the ventral tegmental area (VTA) that are degeneration-sensitive in PD. The genetic network(s) and mode(s) of action of Pitx3 in these mDA neurons remain poorly characterized. We hypothesized that, given their distinct neuronal identities, Pitx3-expressing neurons of SNc and VTA should differ in their Pitx3-controlled gene expression networks and this may involve subset-specific co-regulators. Expression profiling of purified mDA neuronal subsets indicates that Pitx3 regulates different sets of genes in SNc and VTA, such as activating the expression of primary cilium gene products specifically in VTA neurons. Interaction network analysis pointed to the participation of differentially expressed Lhx/Lmo family members in the modulation of Pitx3 action in SNc and VTA mDA neurons. Conversely, global binding patterns of Pitx3 on genomic DNA of human dopaminergic cells revealed that Pitx3 is often co-recruited to regions that foster the formation of GATA-bHLH-BRN complexes, which usually involve Lmo co-regulatory proteins. We focused on Lmo3 for its preferential expression in SNc neurons and demonstrated that it functions as a transcriptional co-activator of Pitx3 by enhancing its activity on genomic regulatory elements. In summary, we defined the SN and VTA-specific programs of Pitx3-dependent gene expression and identified Lmo3 as a SN-specific co-regulator of Pitx3-dependent transcription.
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Affiliation(s)
- Panojot Bifsha
- Laboratoire de génétique moléculaire, Institut de recherches cliniques de Montréal (IRCM), 110, avenue des Pins Ouest, Montréal, Québec, H2W 1R7, Canada.,Division of Experimental Medicine, McGill University, Montréal, Quebec, H3A 1A3, Canada
| | - Aurelio Balsalobre
- Laboratoire de génétique moléculaire, Institut de recherches cliniques de Montréal (IRCM), 110, avenue des Pins Ouest, Montréal, Québec, H2W 1R7, Canada
| | - Jacques Drouin
- Laboratoire de génétique moléculaire, Institut de recherches cliniques de Montréal (IRCM), 110, avenue des Pins Ouest, Montréal, Québec, H2W 1R7, Canada. .,Division of Experimental Medicine, McGill University, Montréal, Quebec, H3A 1A3, Canada.
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47
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Avegno EM, Salling MC, Borgkvist A, Mrejeru A, Whitebirch AC, Margolis EB, Sulzer D, Harrison NL. Voluntary adolescent drinking enhances excitation by low levels of alcohol in a subset of dopaminergic neurons in the ventral tegmental area. Neuropharmacology 2016; 110:386-395. [PMID: 27475082 DOI: 10.1016/j.neuropharm.2016.07.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/22/2016] [Accepted: 07/25/2016] [Indexed: 12/24/2022]
Abstract
Enhanced dopamine (DA) neurotransmission from the ventral tegmental area (VTA) to the ventral striatum is thought to drive drug self-administration and mediate positive reinforcement. We examined neuronal firing rates in slices of mouse midbrain following adolescent binge-like alcohol drinking and find that prior alcohol experience greatly enhanced the sensitivity to excitation by ethanol itself (10-50 mM) in a subset of ventral midbrain DA neurons located in the medial VTA. This enhanced response after drinking was not associated with alterations of firing rate or other measures of intrinsic excitability. In addition, the phenomenon appears to be specific to adolescent drinking, as mice that established a drinking preference only after the onset of adulthood showed no change in alcohol sensitivity. Here we demonstrate not only that drinking during adolescence induces enhanced alcohol sensitivity, but also that this DA neuronal response occurs over a range of alcohol concentrations associated with social drinking in humans.
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Affiliation(s)
- Elizabeth M Avegno
- Department of Pharmacology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States
| | - Michael C Salling
- Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States
| | - Anders Borgkvist
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States
| | - Ana Mrejeru
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States
| | - Alexander C Whitebirch
- Department of Neurobiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States
| | - Elyssa B Margolis
- Department of Neurology, The Wheeler Center for the Neurobiology of Addiction, Alcoholism and Addiction Research Group, University of California, San Francisco, CA 94143, United States
| | - David Sulzer
- Department of Pharmacology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States; Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States; Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York State Psychiatric Institute, New York, NY 10032, United States.
| | - Neil L Harrison
- Department of Pharmacology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States; Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States.
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Bonzano S, Bovetti S, Gendusa C, Peretto P, De Marchis S. Adult Born Olfactory Bulb Dopaminergic Interneurons: Molecular Determinants and Experience-Dependent Plasticity. Front Neurosci 2016; 10:189. [PMID: 27199651 PMCID: PMC4858532 DOI: 10.3389/fnins.2016.00189] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 04/18/2016] [Indexed: 12/31/2022] Open
Abstract
The olfactory bulb (OB) is a highly plastic brain region involved in the early processing of olfactory information. A remarkably feature of the OB circuits in rodents is the constitutive integration of new neurons that takes place during adulthood. Newborn cells in the adult OB are mostly inhibitory interneurons belonging to chemically, morphologically and functionally heterogeneous types. Although there is general agreement that adult neurogenesis in the OB plays a key role in sensory information processing and olfaction-related plasticity, the contribution of each interneuron subtype to such functions is far to be elucidated. Here, we focus on the dopaminergic (DA) interneurons: we highlight recent findings about their morphological features and then describe the molecular factors required for the specification/differentiation and maintenance of the DA phenotype in adult born neurons. We also discuss dynamic changes of the DA interneuron population related to age, environmental stimuli and lesions, and their possible functional implications.
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Affiliation(s)
- Sara Bonzano
- Department of Life Sciences and Systems Biology, University of TurinTorino, Italy; Neuroscience Institute Cavalieri Ottolenghi, University of TurinOrbassano, Italy
| | - Serena Bovetti
- Department of Neuroscience and Brain Technologies, Istituto Italiano di Tecnologia Genova, Italy
| | - Claudio Gendusa
- Department of Life Sciences and Systems Biology, University of Turin Torino, Italy
| | - Paolo Peretto
- Department of Life Sciences and Systems Biology, University of TurinTorino, Italy; Neuroscience Institute Cavalieri Ottolenghi, University of TurinOrbassano, Italy
| | - Silvia De Marchis
- Department of Life Sciences and Systems Biology, University of TurinTorino, Italy; Neuroscience Institute Cavalieri Ottolenghi, University of TurinOrbassano, Italy
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Differential Regulation of Action Potential Shape and Burst-Frequency Firing by BK and Kv2 Channels in Substantia Nigra Dopaminergic Neurons. J Neurosci 2016; 35:16404-17. [PMID: 26674866 DOI: 10.1523/jneurosci.5291-14.2015] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
UNLABELLED Little is known about the voltage-dependent potassium currents underlying spike repolarization in midbrain dopaminergic neurons. Studying mouse substantia nigra pars compacta dopaminergic neurons both in brain slice and after acute dissociation, we found that BK calcium-activated potassium channels and Kv2 channels both make major contributions to the depolarization-activated potassium current. Inhibiting Kv2 or BK channels had very different effects on spike shape and evoked firing. Inhibiting Kv2 channels increased spike width and decreased the afterhyperpolarization, as expected for loss of an action potential-activated potassium conductance. BK inhibition also increased spike width but paradoxically increased the afterhyperpolarization. Kv2 channel inhibition steeply increased the slope of the frequency-current (f-I) relationship, whereas BK channel inhibition had little effect on the f-I slope or decreased it, sometimes resulting in slowed firing. Action potential clamp experiments showed that both BK and Kv2 current flow during spike repolarization but with very different kinetics, with Kv2 current activating later and deactivating more slowly. Further experiments revealed that inhibiting either BK or Kv2 alone leads to recruitment of additional current through the other channel type during the action potential as a consequence of changes in spike shape. Enhancement of slowly deactivating Kv2 current can account for the increased afterhyperpolarization produced by BK inhibition and likely underlies the very different effects on the f-I relationship. The cross-regulation of BK and Kv2 activation illustrates that the functional role of a channel cannot be defined in isolation but depends critically on the context of the other conductances in the cell. SIGNIFICANCE STATEMENT This work shows that BK calcium-activated potassium channels and Kv2 voltage-activated potassium channels both regulate action potentials in dopamine neurons of the substantia nigra pars compacta. Although both channel types participate in action potential repolarization about equally, they have contrasting and partially opposite effects in regulating neuronal firing at frequencies typical of bursting. Our analysis shows that this results from their different kinetic properties, with fast-activating BK channels serving to short-circuit activation of Kv2 channels, which tend to slow firing by producing a deep afterhyperpolarization. The cross-regulation of BK and Kv2 activation illustrates that the functional role of a channel cannot be defined in isolation but depends critically on the context of the other conductances in the cell.
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50
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Functionalized composite scaffolds improve the engraftment of transplanted dopaminergic progenitors in a mouse model of Parkinson's disease. Biomaterials 2016; 74:89-98. [DOI: 10.1016/j.biomaterials.2015.09.039] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 09/25/2015] [Accepted: 09/26/2015] [Indexed: 12/16/2022]
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