Conjunctive changes in multiple ion channels mediate activity-dependent intrinsic plasticity in hippocampal granule cells
Summary: Plasticity in the brain is ubiquitous. How do neurons and networks encode new information and simultaneously maintain homeostasis in the face of such ubiquitous plasticity? Here, we unveil a form of neuronal plasticity in rat hippocampal granule cells, which is mediated by conjunctive chang...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-03-01
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| Series: | iScience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004222001924 |
| _version_ | 1818908506553581568 |
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| author | Poonam Mishra Rishikesh Narayanan |
| author_facet | Poonam Mishra Rishikesh Narayanan |
| author_sort | Poonam Mishra |
| collection | DOAJ |
| description | Summary: Plasticity in the brain is ubiquitous. How do neurons and networks encode new information and simultaneously maintain homeostasis in the face of such ubiquitous plasticity? Here, we unveil a form of neuronal plasticity in rat hippocampal granule cells, which is mediated by conjunctive changes in HCN, inward-rectifier potassium, and persistent sodium channels induced by theta-modulated burst firing, a behaviorally relevant activity pattern. Cooperation and competition among these simultaneous changes resulted in a unique physiological signature: sub-threshold excitability and temporal summation were reduced without significant changes in action potential firing, together indicating a concurrent enhancement of supra-threshold excitability. This form of intrinsic plasticity was dependent on calcium influx through L-type calcium channels and inositol trisphosphate receptors. These observations demonstrate that although brain plasticity is ubiquitous, strong systemic constraints govern simultaneous plasticity in multiple components—referred here as plasticity manifolds—thereby providing a cellular substrate for concomitant encoding and homeostasis in engram cells. |
| first_indexed | 2024-12-19T22:12:06Z |
| format | Article |
| id | doaj.art-e2b0f044890f4355b71c6d4aa25eeba1 |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-12-19T22:12:06Z |
| publishDate | 2022-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-e2b0f044890f4355b71c6d4aa25eeba12022-12-21T20:03:52ZengElsevieriScience2589-00422022-03-01253103922Conjunctive changes in multiple ion channels mediate activity-dependent intrinsic plasticity in hippocampal granule cellsPoonam Mishra0Rishikesh Narayanan1Cellular Neurophysiology Laboratory, Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, IndiaCellular Neurophysiology Laboratory, Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India; Corresponding authorSummary: Plasticity in the brain is ubiquitous. How do neurons and networks encode new information and simultaneously maintain homeostasis in the face of such ubiquitous plasticity? Here, we unveil a form of neuronal plasticity in rat hippocampal granule cells, which is mediated by conjunctive changes in HCN, inward-rectifier potassium, and persistent sodium channels induced by theta-modulated burst firing, a behaviorally relevant activity pattern. Cooperation and competition among these simultaneous changes resulted in a unique physiological signature: sub-threshold excitability and temporal summation were reduced without significant changes in action potential firing, together indicating a concurrent enhancement of supra-threshold excitability. This form of intrinsic plasticity was dependent on calcium influx through L-type calcium channels and inositol trisphosphate receptors. These observations demonstrate that although brain plasticity is ubiquitous, strong systemic constraints govern simultaneous plasticity in multiple components—referred here as plasticity manifolds—thereby providing a cellular substrate for concomitant encoding and homeostasis in engram cells.http://www.sciencedirect.com/science/article/pii/S2589004222001924Biological sciencesMolecular physiologyMolecular neuroscienceCellular neuroscience |
| spellingShingle | Poonam Mishra Rishikesh Narayanan Conjunctive changes in multiple ion channels mediate activity-dependent intrinsic plasticity in hippocampal granule cells iScience Biological sciences Molecular physiology Molecular neuroscience Cellular neuroscience |
| title | Conjunctive changes in multiple ion channels mediate activity-dependent intrinsic plasticity in hippocampal granule cells |
| title_full | Conjunctive changes in multiple ion channels mediate activity-dependent intrinsic plasticity in hippocampal granule cells |
| title_fullStr | Conjunctive changes in multiple ion channels mediate activity-dependent intrinsic plasticity in hippocampal granule cells |
| title_full_unstemmed | Conjunctive changes in multiple ion channels mediate activity-dependent intrinsic plasticity in hippocampal granule cells |
| title_short | Conjunctive changes in multiple ion channels mediate activity-dependent intrinsic plasticity in hippocampal granule cells |
| title_sort | conjunctive changes in multiple ion channels mediate activity dependent intrinsic plasticity in hippocampal granule cells |
| topic | Biological sciences Molecular physiology Molecular neuroscience Cellular neuroscience |
| url | http://www.sciencedirect.com/science/article/pii/S2589004222001924 |
| work_keys_str_mv | AT poonammishra conjunctivechangesinmultipleionchannelsmediateactivitydependentintrinsicplasticityinhippocampalgranulecells AT rishikeshnarayanan conjunctivechangesinmultipleionchannelsmediateactivitydependentintrinsicplasticityinhippocampalgranulecells |