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Ireton KE, Xing X, Kim K, Weiner JC, Jacobi AA, Grover A, Foote M, Ota Y, Berman R, Hanks T, Hell JW. Regulation of the Ca 2+ Channel Ca V1.2 Supports Spatial Memory and Its Flexibility and LTD. J Neurosci 2023; 43:5559-5573. [PMID: 37419689 PMCID: PMC10376936 DOI: 10.1523/jneurosci.1521-22.2023] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 04/30/2023] [Accepted: 05/15/2023] [Indexed: 07/09/2023] Open
Abstract
Widespread release of norepinephrine (NE) throughout the forebrain fosters learning and memory via adrenergic receptor (AR) signaling, but the molecular mechanisms are largely unknown. The β2 AR and its downstream effectors, the trimeric stimulatory Gs-protein, adenylyl cyclase (AC), and the cAMP-dependent protein kinase A (PKA), form a unique signaling complex with the L-type Ca2+ channel (LTCC) CaV1.2. Phosphorylation of CaV1.2 by PKA on Ser1928 is required for the upregulation of Ca2+ influx on β2 AR stimulation and long-term potentiation induced by prolonged theta-tetanus (PTT-LTP) but not LTP induced by two 1-s-long 100-Hz tetani. However, the function of Ser1928 phosphorylation in vivo is unknown. Here, we show that S1928A knock-in (KI) mice of both sexes, which lack PTT-LTP, express deficiencies during initial consolidation of spatial memory. Especially striking is the effect of this mutation on cognitive flexibility as tested by reversal learning. Mechanistically, long-term depression (LTD) has been implicated in reversal learning. It is abrogated in male and female S1928A knock-in mice and by β2 AR antagonists and peptides that displace β2 AR from CaV1.2. This work identifies CaV1.2 as a critical molecular locus that regulates synaptic plasticity, spatial memory and its reversal, and LTD.SIGNIFICANCE STATEMENT We show that phosphorylation of the Ca2+ channel CaV1.2 on Ser1928 is important for consolidation of spatial memory and especially its reversal, and long-term depression (LTD). Identification of Ser1928 as critical for LTD and reversal learning supports the model that LTD underlies flexibility of reference memory.
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Affiliation(s)
- Kyle E Ireton
- Department of Pharmacology, University of California, Davis, California 95616-8636
- Center for Neuroscience, University of California, Davis, California 95616-8636
| | - Xiaoming Xing
- Department of Pharmacology, University of California, Davis, California 95616-8636
| | - Karam Kim
- Department of Pharmacology, University of California, Davis, California 95616-8636
| | - Justin C Weiner
- Department of Pharmacology, University of California, Davis, California 95616-8636
| | - Ariel A Jacobi
- Department of Pharmacology, University of California, Davis, California 95616-8636
| | - Aarushi Grover
- Department of Pharmacology, University of California, Davis, California 95616-8636
| | - Molly Foote
- Center for Neuroscience, University of California, Davis, California 95616-8636
| | - Yusuke Ota
- Center for Neuroscience, University of California, Davis, California 95616-8636
| | - Robert Berman
- Center for Neuroscience, University of California, Davis, California 95616-8636
| | - Timothy Hanks
- Center for Neuroscience, University of California, Davis, California 95616-8636
- Department of Neurology, University of California, Davis, California 95616-8636
| | - Johannes W Hell
- Department of Pharmacology, University of California, Davis, California 95616-8636
- Center for Neuroscience, University of California, Davis, California 95616-8636
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Wang Y, Shi Q, Li M, Zhao M, Reddy Gopireddy R, Teoh JP, Xu B, Zhu C, Ireton KE, Srinivasan S, Chen S, Gasser PJ, Bossuyt J, Hell JW, Bers DM, Xiang YK. Intracellular β 1-Adrenergic Receptors and Organic Cation Transporter 3 Mediate Phospholamban Phosphorylation to Enhance Cardiac Contractility. Circ Res 2021; 128:246-261. [PMID: 33183171 PMCID: PMC7856104 DOI: 10.1161/circresaha.120.317452] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE β1ARs (β1-adrenoceptors) exist at intracellular membranes and OCT3 (organic cation transporter 3) mediates norepinephrine entry into cardiomyocytes. However, the functional role of intracellular β1AR in cardiac contractility remains to be elucidated. OBJECTIVE Test localization and function of intracellular β1AR on cardiac contractility. METHODS AND RESULTS Membrane fractionation, super-resolution imaging, proximity ligation, coimmunoprecipitation, and single-molecule pull-down demonstrated a pool of β1ARs in mouse hearts that were associated with sarco/endoplasmic reticulum Ca2+-ATPase at the sarcoplasmic reticulum (SR). Local PKA (protein kinase A) activation was measured using a PKA biosensor targeted at either the plasma membrane (PM) or SR. Compared with wild-type, myocytes lacking OCT3 (OCT3-KO [OCT3 knockout]) responded identically to the membrane-permeant βAR agonist isoproterenol in PKA activation at both PM and SR. The same was true at the PM for membrane-impermeant norepinephrine, but the SR response to norepinephrine was suppressed in OCT3-KO myocytes. This differential effect was recapitulated in phosphorylation of the SR-pump regulator phospholamban. Similarly, OCT3-KO selectively suppressed calcium transients and contraction responses to norepinephrine but not isoproterenol. Furthermore, sotalol, a membrane-impermeant βAR-blocker, suppressed isoproterenol-induced PKA activation at the PM but permitted PKA activation at the SR, phospholamban phosphorylation, and contractility. Moreover, pretreatment with sotalol in OCT3-KO myocytes prevented norepinephrine-induced PKA activation at both PM and the SR and contractility. CONCLUSIONS Functional β1ARs exists at the SR and is critical for PKA-mediated phosphorylation of phospholamban and cardiac contractility upon catecholamine stimulation. Activation of these intracellular β1ARs requires catecholamine transport via OCT3.
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MESH Headings
- Adrenergic beta-Agonists/pharmacology
- Adrenergic beta-Antagonists/pharmacology
- Animals
- Calcium-Binding Proteins/metabolism
- Cell Membrane/metabolism
- Cells, Cultured
- Cyclic AMP-Dependent Protein Kinases/metabolism
- Female
- Heart Rate
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Myocardial Contraction/drug effects
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Organic Cation Transport Proteins/genetics
- Organic Cation Transport Proteins/metabolism
- Phosphorylation
- Rabbits
- Rats
- Rats, Sprague-Dawley
- Receptors, Adrenergic, beta-1/genetics
- Receptors, Adrenergic, beta-1/metabolism
- Receptors, Adrenergic, beta-2/genetics
- Receptors, Adrenergic, beta-2/metabolism
- Sarcoplasmic Reticulum/metabolism
- Signal Transduction
- Mice
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Affiliation(s)
- Ying Wang
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Qian Shi
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Minghui Li
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
- Nanjing First Hospital, Nanjing Medical University, China (M.L., S.C.)
| | - Meimi Zhao
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
- Department of Pharmaceutical Toxicology, China Medical University (M.Z.)
| | - Raghavender Reddy Gopireddy
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Jian-Peng Teoh
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Bing Xu
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
- VA Northern California Health Care System, Mather, CA (B.X., Y.K.X.)
| | - Chaoqun Zhu
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Kyle E Ireton
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Sanghavi Srinivasan
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Shaoliang Chen
- Nanjing First Hospital, Nanjing Medical University, China (M.L., S.C.)
| | - Paul J Gasser
- Department of Biomedical Sciences, Marquette University, Milwaukee, WI (P.J.G.)
| | - Julie Bossuyt
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Johannes W Hell
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Donald M Bers
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Yang K Xiang
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
- VA Northern California Health Care System, Mather, CA (B.X., Y.K.X.)
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Trias E, Díaz-Amarilla P, Olivera-Bravo S, Isasi E, Drechsel DA, Lopez N, Bradford CS, Ireton KE, Beckman JS, Barbeito L. Phenotypic transition of microglia into astrocyte-like cells associated with disease onset in a model of inherited ALS. Front Cell Neurosci 2013; 7:274. [PMID: 24399933 PMCID: PMC3871969 DOI: 10.3389/fncel.2013.00274] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 12/09/2013] [Indexed: 01/22/2023] Open
Abstract
Microglia and reactive astrocytes accumulate in the spinal cord of rats expressing the Amyotrophic lateral sclerosis (ALS)-linked SOD1 G93A mutation. We previously reported that the rapid progression of paralysis in ALS rats is associated with the appearance of proliferative astrocyte-like cells that surround motor neurons. These cells, designated as Aberrant Astrocytes (AbA cells) because of their atypical astrocytic phenotype, exhibit high toxicity to motor neurons. However, the cellular origin of AbA cells remains unknown. Because AbA cells are labeled with the proliferation marker Ki67, we analyzed the phenotypic makers of proliferating glial cells that surround motor neurons by immunohistochemistry. The number of Ki67 +AbA cells sharply increased in symptomatic rats, displaying large cell bodies with processes embracing motor neurons. Most were co-labeled with astrocytic marker GFAP concurrently with the microglial markers Iba1 and CD163. Cultures of spinal cord prepared from symptomatic SOD1 G93A rats yielded large numbers of microglia expressing Iba1, CD11b, and CD68. Cells sorted for CD11b expression by flow cytometry transformed into AbA cells within two weeks. During these two weeks, the expression of microglial markers largely disappeared, while GFAP and S100β expression increased. The phenotypic transition to AbA cells was stimulated by forskolin. These findings provide evidence for a subpopulation of proliferating microglial cells in SOD1 G93A rats that undergo a phenotypic transition into AbA cells after onset of paralysis that may promote the fulminant disease progression. These cells could be a therapeutic target for slowing paralysis progression in ALS.
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Affiliation(s)
- Emiliano Trias
- Instituto de Investigaciones Biológicas Clemente Estable Montevideo, Uruguay
| | - Pablo Díaz-Amarilla
- Instituto de Investigaciones Biológicas Clemente Estable Montevideo, Uruguay
| | | | - Eugenia Isasi
- Instituto de Investigaciones Biológicas Clemente Estable Montevideo, Uruguay
| | - Derek A Drechsel
- Department of Biochemistry and Biophysics, Oregon State University Corvallis, OR, USA ; Environmental Health Sciences Center, Oregon State University, Corvallis OR, USA
| | - Nathan Lopez
- Department of Biochemistry and Biophysics, Oregon State University Corvallis, OR, USA ; Environmental Health Sciences Center, Oregon State University, Corvallis OR, USA
| | - C Samuel Bradford
- Department of Biochemistry and Biophysics, Oregon State University Corvallis, OR, USA ; Environmental Health Sciences Center, Oregon State University, Corvallis OR, USA
| | - Kyle E Ireton
- Department of Biochemistry and Biophysics, Oregon State University Corvallis, OR, USA ; Environmental Health Sciences Center, Oregon State University, Corvallis OR, USA ; Institut Pasteur de Montevideo Montevideo, Uruguay
| | - Joseph S Beckman
- Department of Biochemistry and Biophysics, Oregon State University Corvallis, OR, USA ; Environmental Health Sciences Center, Oregon State University, Corvallis OR, USA ; Linus Pauling Institute, Oregon State University Corvallis, OR, USA
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