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Severin D, Moreno C, Tran T, Wesselborg C, Shirley S, Contreras A, Kirkwood A, Golowasch J. Daily oscillations of neuronal membrane capacitance. Cell Rep 2024; 43:114744. [PMID: 39298314 DOI: 10.1016/j.celrep.2024.114744] [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: 01/16/2024] [Revised: 07/18/2024] [Accepted: 08/28/2024] [Indexed: 09/21/2024] Open
Abstract
Capacitance of biological membranes is determined by the properties of the lipid portion of the membrane as well as the morphological features of a cell. In neurons, membrane capacitance is a determining factor of synaptic integration, action potential propagation speed, and firing frequency due to its direct effect on the membrane time constant. Besides slow changes associated with increased morphological complexity during postnatal maturation, neuronal membrane capacitance is considered a stable, non-regulated, and constant magnitude. Here we report that, in two excitatory neuronal cell types, pyramidal cells of the mouse primary visual cortex and granule cells of the hippocampus, the membrane capacitance significantly changes between the start and the end of a daily light-dark cycle. The changes are large, nearly 2-fold in magnitude in pyramidal cells, but are not observed in cortical parvalbumin-expressing inhibitory interneurons. Consistent with daily capacitance fluctuations, the time window for synaptic integration also changes in pyramidal cells.
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Affiliation(s)
- Daniel Severin
- Johns Hopkins Zanvyl Krieger Mind/Brain Institute, Johns Hopkins University, Rm. 350 Dunning Hall, 3400 N. Charles St., Baltimore, MD 21218, USA; The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA
| | - Cristián Moreno
- Johns Hopkins Zanvyl Krieger Mind/Brain Institute, Johns Hopkins University, Rm. 350 Dunning Hall, 3400 N. Charles St., Baltimore, MD 21218, USA; The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA
| | - Trinh Tran
- Johns Hopkins Zanvyl Krieger Mind/Brain Institute, Johns Hopkins University, Rm. 350 Dunning Hall, 3400 N. Charles St., Baltimore, MD 21218, USA; The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA
| | - Christian Wesselborg
- Department of Biology, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA
| | - Sofia Shirley
- Department of Biology, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA
| | - Altagracia Contreras
- Department of Biology, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA
| | - Alfredo Kirkwood
- Johns Hopkins Zanvyl Krieger Mind/Brain Institute, Johns Hopkins University, Rm. 350 Dunning Hall, 3400 N. Charles St., Baltimore, MD 21218, USA; The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA; Department of Biology, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA.
| | - Jorge Golowasch
- Department of Biological Sciences, New Jersey Institute of Technology, Newark, NJ 07102, USA.
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Barzó P, Szöts I, Tóth M, Csajbók ÉA, Molnár G, Tamás G. Electrophysiology and Morphology of Human Cortical Supragranular Pyramidal Cells in a Wide Age Range. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.13.598792. [PMID: 38915496 PMCID: PMC11195274 DOI: 10.1101/2024.06.13.598792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
The basic excitatory neurons of the cerebral cortex, the pyramidal cells, are the most important signal integrators for the local circuit. They have quite characteristic morphological and electrophysiological properties that are known to be largely constant with age in the young and adult cortex. However, the brain undergoes several dynamic changes throughout life, such as in the phases of early development and cognitive decline in the aging brain. We set out to search for intrinsic cellular changes in supragranular pyramidal cells across a broad age range: from birth to 85 years of age and we found differences in several biophysical properties between defined age groups. During the first year of life, subthreshold and suprathreshold electrophysiological properties changed in a way that shows that pyramidal cells become less excitable with maturation, but also become temporarily more precise. According to our findings, the morphological features of the three-dimensional reconstructions from different life stages showed consistent morphological properties and systematic dendritic spine analysis of an infantile and an old pyramidal cell showed clear significant differences in the distribution of spine shapes. Overall, the changes that occur during development and aging may have lasting effects on the properties of pyramidal cells in the cerebral cortex. Understanding these changes is important to unravel the complex mechanisms underlying brain development, cognition and age-related neurodegenerative diseases.
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Affiliation(s)
- Pál Barzó
- Department of Neurosurgery, University of Szeged, Szeged, Hungary
| | - Ildikó Szöts
- ELKH-SZTE Research Group for Cortical Microcircuits, Department of Physiology, Anatomy and Neuroscience, University of Szeged, Szeged, Hungary
| | - Martin Tóth
- ELKH-SZTE Research Group for Cortical Microcircuits, Department of Physiology, Anatomy and Neuroscience, University of Szeged, Szeged, Hungary
| | - Éva Adrienn Csajbók
- ELKH-SZTE Research Group for Cortical Microcircuits, Department of Physiology, Anatomy and Neuroscience, University of Szeged, Szeged, Hungary
| | - Gábor Molnár
- ELKH-SZTE Research Group for Cortical Microcircuits, Department of Physiology, Anatomy and Neuroscience, University of Szeged, Szeged, Hungary
| | - Gábor Tamás
- ELKH-SZTE Research Group for Cortical Microcircuits, Department of Physiology, Anatomy and Neuroscience, University of Szeged, Szeged, Hungary
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Taylor SR, Kobayashi M, Vilella A, Tiwari D, Zolboot N, Du JX, Spencer KR, Hartzell A, Girgiss C, Abaci YT, Shao Y, De Sanctis C, Bellenchi GC, Darnell RB, Gross C, Zoli M, Berg DK, Lippi G. MicroRNA-218 instructs proper assembly of hippocampal networks. eLife 2023; 12:e82729. [PMID: 37862092 PMCID: PMC10637775 DOI: 10.7554/elife.82729] [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: 08/16/2022] [Accepted: 10/10/2023] [Indexed: 10/21/2023] Open
Abstract
The assembly of the mammalian brain is orchestrated by temporally coordinated waves of gene expression. Post-transcriptional regulation by microRNAs (miRNAs) is a key aspect of this program. Indeed, deletion of neuron-enriched miRNAs induces strong developmental phenotypes, and miRNA levels are altered in patients with neurodevelopmental disorders. However, the mechanisms used by miRNAs to instruct brain development remain largely unexplored. Here, we identified miR-218 as a critical regulator of hippocampal assembly. MiR-218 is highly expressed in the hippocampus and enriched in both excitatory principal neurons (PNs) and GABAergic inhibitory interneurons (INs). Early life inhibition of miR-218 results in an adult brain with a predisposition to seizures. Changes in gene expression in the absence of miR-218 suggest that network assembly is impaired. Indeed, we find that miR-218 inhibition results in the disruption of early depolarizing GABAergic signaling, structural defects in dendritic spines, and altered intrinsic membrane excitability. Conditional knockout of Mir218-2 in INs, but not PNs, is sufficient to recapitulate long-term instability. Finally, de-repressing Kif21b and Syt13, two miR-218 targets, phenocopies the effects on early synchronous network activity induced by miR-218 inhibition. Taken together, the data suggest that miR-218 orchestrates formative events in PNs and INs to produce stable networks.
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Affiliation(s)
- Seth R Taylor
- Division of Biological Sciences, University of California, San DiegoLa JollaUnited States
| | - Mariko Kobayashi
- Laboratory of Molecular Neuro-oncology, Howard Hughes Medical Institute, Rockefeller UniversityNew YorkUnited States
| | - Antonietta Vilella
- Department of Biomedical, Metabolic and Neural Sciences; Center for Neuroscience and Neurotechnology (CfNN), University of Modena and Reggio EmiliaModenaItaly
| | - Durgesh Tiwari
- Division of Neurology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of MedicineCincinnatiUnited States
- Department of Pediatrics, University of Cincinnati College of MedicineCincinnatiUnited States
| | - Norjin Zolboot
- Department of Neuroscience, Scripps Research InstituteLa JollaUnited States
| | - Jessica X Du
- Department of Neuroscience, Scripps Research InstituteLa JollaUnited States
| | - Kathryn R Spencer
- Department of Neuroscience, Scripps Research InstituteLa JollaUnited States
| | - Andrea Hartzell
- Department of Neuroscience, Scripps Research InstituteLa JollaUnited States
| | - Carol Girgiss
- Division of Biological Sciences, University of California, San DiegoLa JollaUnited States
| | - Yusuf T Abaci
- Division of Biological Sciences, University of California, San DiegoLa JollaUnited States
| | - Yufeng Shao
- Department of Neuroscience, Scripps Research InstituteLa JollaUnited States
| | | | - Gian Carlo Bellenchi
- Institute of Genetics and Biophysics A Buzzati-TraversoNaplesItaly
- IRCCS Fondazione Santa LuciaRomeItaly
| | - Robert B Darnell
- Laboratory of Molecular Neuro-oncology, Howard Hughes Medical Institute, Rockefeller UniversityNew YorkUnited States
| | - Christina Gross
- Division of Neurology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of MedicineCincinnatiUnited States
- Department of Pediatrics, University of Cincinnati College of MedicineCincinnatiUnited States
| | - Michele Zoli
- Department of Biomedical, Metabolic and Neural Sciences; Center for Neuroscience and Neurotechnology (CfNN), University of Modena and Reggio EmiliaModenaItaly
| | - Darwin K Berg
- Division of Biological Sciences, University of California, San DiegoLa JollaUnited States
| | - Giordano Lippi
- Department of Neuroscience, Scripps Research InstituteLa JollaUnited States
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Halfmann C, Rüland T, Müller F, Jehasse K, Kampa BM. Electrophysiological properties of layer 2/3 pyramidal neurons in the primary visual cortex of a retinitis pigmentosa mouse model ( rd10). Front Cell Neurosci 2023; 17:1258773. [PMID: 37780205 PMCID: PMC10540630 DOI: 10.3389/fncel.2023.1258773] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 08/25/2023] [Indexed: 10/03/2023] Open
Abstract
Retinal degeneration is one of the main causes of visual impairment and blindness. One group of retinal degenerative diseases, leading to the loss of photoreceptors, is collectively termed retinitis pigmentosa. In this group of diseases, the remaining retina is largely spared from initial cell death making retinal ganglion cells an interesting target for vision restoration methods. However, it is unknown how downstream brain areas, in particular the visual cortex, are affected by the progression of blindness. Visual deprivation studies have shown dramatic changes in the electrophysiological properties of visual cortex neurons, but changes on a cellular level in retinitis pigmentosa have not been investigated yet. Therefore, we used the rd10 mouse model to perform patch-clamp recordings of pyramidal neurons in layer 2/3 of the primary visual cortex to screen for potential changes in electrophysiological properties resulting from retinal degeneration. Compared to wild-type C57BL/6 mice, we only found an increase in intrinsic excitability around the time point of maximal retinal degeneration. In addition, we saw an increase in the current amplitude of spontaneous putative inhibitory events after a longer progression of retinal degeneration. However, we did not observe a long-lasting shift in excitability after prolonged retinal degeneration. Together, our results provide evidence of an intact visual cortex with promising potential for future therapeutic strategies to restore vision.
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Affiliation(s)
- Claas Halfmann
- Systems Neurophysiology, Institute of Zoology, RWTH Aachen University, Aachen, Germany
| | - Thomas Rüland
- Systems Neurophysiology, Institute of Zoology, RWTH Aachen University, Aachen, Germany
- Molecular and Cellular Physiology, Institute of Biological Information Processing (IBI-1), Forschungszentrum Jülich GmbH, Jülich, Germany
- Research Training Group 2416 MultiSenses-MultiScales, RWTH Aachen University, Aachen, Germany
| | - Frank Müller
- Molecular and Cellular Physiology, Institute of Biological Information Processing (IBI-1), Forschungszentrum Jülich GmbH, Jülich, Germany
- Research Training Group 2416 MultiSenses-MultiScales, RWTH Aachen University, Aachen, Germany
- Research Training Group 2610 Innoretvision, RWTH Aachen University, Aachen, Germany
| | - Kevin Jehasse
- Systems Neurophysiology, Institute of Zoology, RWTH Aachen University, Aachen, Germany
| | - Björn M. Kampa
- Systems Neurophysiology, Institute of Zoology, RWTH Aachen University, Aachen, Germany
- Research Training Group 2416 MultiSenses-MultiScales, RWTH Aachen University, Aachen, Germany
- Research Training Group 2610 Innoretvision, RWTH Aachen University, Aachen, Germany
- JARA BRAIN, Institute of Neuroscience and Medicine (INM-10), Forschungszentrum Jülich, Jülich, Germany
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Burnsed J, Matysik W, Yang L, Sun H, Joshi S, Kapur J. Increased glutamatergic synaptic transmission during development in layer II/III mouse motor cortex pyramidal neurons. Cereb Cortex 2023; 33:4645-4653. [PMID: 36137566 PMCID: PMC10110452 DOI: 10.1093/cercor/bhac368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/22/2022] [Accepted: 08/23/2022] [Indexed: 11/13/2022] Open
Abstract
Postnatal maturation of the motor cortex is vital to developing a variety of functions, including the capacity for motor learning. The first postnatal weeks involve many neuronal and synaptic changes, which differ by region and layer, likely due to different functions and needs during development. Motor cortex layer II/III is critical to receiving and integrating inputs from somatosensory cortex and generating attentional signals that are important in motor learning and planning. Here, we examined the neuronal and synaptic changes occurring in layer II/III pyramidal neurons of the mouse motor cortex from the neonatal (postnatal day 10) to young adult (postnatal day 30) period, using a combination of electrophysiology and biochemical measures of glutamatergic receptor subunits. There are several changes between p10 and p30 in these neurons, including increased dendritic branching, neuronal excitability, glutamatergic synapse number and synaptic transmission. These changes are critical to ongoing plasticity and capacity for motor learning during development. Understanding these changes will help inform future studies examining the impact of early-life injury and experiences on motor learning and development capacity.
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Affiliation(s)
- Jennifer Burnsed
- Department of Pediatrics, University of Virginia, Charlottesville, Virginia 22908-0386, USA
- Department of Neurology, University of Virginia, Charlottesville, Virginia 22908-0386, USA
| | - Weronika Matysik
- Department of Pediatrics, University of Virginia, Charlottesville, Virginia 22908-0386, USA
| | - Lu Yang
- Department of Neurology, University of Virginia, Charlottesville, Virginia 22908-0386, USA
- Department of Pediatrics, Shandong University, Jian, Shandong 250012, China
| | - Huayu Sun
- Department of Neurology, University of Virginia, Charlottesville, Virginia 22908-0386, USA
| | - Suchitra Joshi
- Department of Neurology, University of Virginia, Charlottesville, Virginia 22908-0386, USA
| | - Jaideep Kapur
- Department of Neurology, University of Virginia, Charlottesville, Virginia 22908-0386, USA
- Department of Neuroscience, University of Virginia, Charlottesville, Virginia 22908-0386, USA
- Brain Institute, University of Virginia, Charlottesville, Virginia 22908-0386, USA
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Ciganok-Hückels N, Jehasse K, Kricsfalussy-Hrabár L, Ritter M, Rüland T, Kampa BM. Postnatal development of electrophysiological and morphological properties in layer 2/3 and layer 5 pyramidal neurons in the mouse primary visual cortex. Cereb Cortex 2022; 33:5875-5884. [PMID: 36453454 PMCID: PMC10183751 DOI: 10.1093/cercor/bhac467] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 11/04/2022] [Accepted: 11/05/2022] [Indexed: 12/03/2022] Open
Abstract
Abstract
Eye-opening is a critical point for laminar maturation of pyramidal neurons (PNs) in primary visual cortex. Knowing both the intrinsic properties and morphology of PNs from the visual cortex during development is crucial to contextualize the integration of visual inputs at different age stages. Few studies have reported changes in intrinsic excitability in these neurons but were restricted to only one layer or one stage of cortical development. Here, we used in vitro whole-cell patch-clamp to investigate the developmental impact on electrophysiological properties of layer 2/3 and layer 5 PNs in mouse visual cortex. Additionally, we evaluated the morphological changes before and after eye-opening and compared these in adult mice. Overall, we found a decrease in intrinsic excitability in both layers after eye-opening which remained stable between juvenile and adult mice. The basal dendritic length increased in layer 5 neurons, whereas spine density increased in layer 2/3 neurons after eye-opening. These data show increased number of synapses after onset of sensory input paralleled with a reduced excitability, presumably as homeostatic mechanism. Altogether, we provide a database of the properties of PNs in mouse visual cortex by considering the layer- and time-specific changes of these neurons during sensory development.
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Affiliation(s)
- Natalja Ciganok-Hückels
- Systems Neurophysiology, Institute of Zoology, RWTH Aachen University , 52074 Aachen , Germany
- Research Training Group 2416 MultiSenses-MultiScales, RWTH Aachen University , 52074 Aachen , Germany
| | - Kevin Jehasse
- Systems Neurophysiology, Institute of Zoology, RWTH Aachen University , 52074 Aachen , Germany
| | | | - Mira Ritter
- Systems Neurophysiology, Institute of Zoology, RWTH Aachen University , 52074 Aachen , Germany
| | - Thomas Rüland
- Systems Neurophysiology, Institute of Zoology, RWTH Aachen University , 52074 Aachen , Germany
- Research Training Group 2416 MultiSenses-MultiScales, RWTH Aachen University , 52074 Aachen , Germany
- Institute for Biological Information Processing (IBI-1), Forschungszentrum Jülich , 52428 Jülich , Germany
| | - Björn M Kampa
- Systems Neurophysiology, Institute of Zoology, RWTH Aachen University , 52074 Aachen , Germany
- Research Training Group 2416 MultiSenses-MultiScales, RWTH Aachen University , 52074 Aachen , Germany
- JARA BRAIN, Institute of Neuroscience and Medicine (INM-10), Forschungszentrum Jülich , 52428 Jülich , Germany
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