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Masmudi‐Martín M, Navarro‐Lobato I, López‐Aranda MF, Quiros‐Ortega ME, Carretero‐Rey M, Garcia‐Garrido MF, López Téllez JF, Jiménez‐Recuerda I, Muñoz de Leon López CA, Khan ZU. Brain areas interconnected to ventral pathway circuits are independently able to induce enhancement in object recognition memory and cause reversal in object recognition memory deficit. CNS Neurosci Ther 2024; 30:e14727. [PMID: 38644593 PMCID: PMC11033489 DOI: 10.1111/cns.14727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 04/23/2024] Open
Abstract
AIMS Ventral pathway circuits are constituted by the interconnected brain areas that are distributed throughout the brain. These brain circuits are primarily involved in processing of object related information in brain. However, their role in object recognition memory (ORM) enhancement remains unknown. Here, we have studied on the implication of these circuits in ORM enhancement and in reversal of ORM deficit in aging. METHODS The brain areas interconnected to ventral pathway circuits in rat brain were activated by an expression of a protein called regulator of G-protein signaling 14 of 414 amino acids (RGS14414). RGS14414 is an ORM enhancer and therefore used here as a gain-in-function tool. ORM test and immunohistochemistry, lesions, neuronal arborization, and knockdown studies were performed to uncover the novel function of ventral pathway circuits. RESULTS An activation of each of the brain areas interconnected to ventral pathway circuits individually induced enhancement in ORM; however, same treatment in brain areas not interconnected to ventral pathway circuits produced no effect. Further study in perirhinal cortex (PRh), area V2 of visual cortex and frontal cortex (FrC), which are brain areas that have been shown to be involved in ORM and are interconnected to ventral pathway circuits, revealed that ORM enhancement seen after the activation of any one of the three brain areas was unaffected by the lesions in other two brain areas either individually in each area or even concurrently in both areas. This ORM enhancement in all three brain areas was associated to increase in structural plasticity of pyramidal neurons where more than 2-fold higher dendritic spines were observed. Additionally, we found that an activation of either PRh, area V2, or FrC not only was adequate but also was sufficient for the reversal of ORM deficit in aging rats, and the blockade of RGS14414 activity led to loss in increase in dendritic spine density and failure in reversal of ORM deficit. CONCLUSIONS These results suggest that brain areas interconnected to ventral pathway circuits facilitate ORM enhancement by an increase in synaptic connectivity between the local brain area circuits and the passing by ventral pathway circuits and an upregulation in activity of ventral pathway circuits. In addition, the finding of the reversal of ORM deficit through activation of an interconnected brain area might serve as a platform for developing not only therapy against memory deficits but also strategies for other brain diseases in which neuronal circuits are compromised.
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Affiliation(s)
- Mariam Masmudi‐Martín
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
- Present address:
Brain Metastasis GroupNational Cancer Research Centre (CNIO)MadridSpain
| | - Irene Navarro‐Lobato
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
| | - Manuel F. López‐Aranda
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
- Present address:
Departmento de Biología celular, Genética y FisiologíaUniversidad de MálagaMálagaMálagaSpain
| | - María E. Quiros‐Ortega
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
| | - Marta Carretero‐Rey
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
| | - María F. Garcia‐Garrido
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
| | - Juan F. López Téllez
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
| | - Inmaculada Jiménez‐Recuerda
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
| | - Cristina A. Muñoz de Leon López
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
| | - Zafar U. Khan
- Laboratory of NeurobiologyCIMESUniversity of MalagaMalagaSpain
- Department of MedicineFaculty of MedicineUniversity of MalagaMalagaSpain
- CIBERNEDInstitute of Health Carlos IIIMadridSpain
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2
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Del Calvo G, Baggio Lopez T, Lymperopoulos A. The therapeutic potential of targeting cardiac RGS4. Ther Adv Cardiovasc Dis 2023; 17:17539447231199350. [PMID: 37724539 PMCID: PMC10510358 DOI: 10.1177/17539447231199350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/16/2023] [Indexed: 09/21/2023] Open
Abstract
G protein-coupled receptors (GPCRs) play pivotal roles in regulation of cardiac function and homeostasis. To function properly, every cell needs these receptors to be stimulated only when a specific extracellular stimulus is present, and to be silenced the moment that stimulus is removed. The regulator of G protein signaling (RGS) proteins are crucial for the latter to occur at the cell membrane, where the GPCR normally resides. Perturbations in both activation and termination of G protein signaling underlie numerous heart pathologies. Although more than 30 mammalian RGS proteins have been identified, each RGS protein seems to interact only with a specific set of G protein subunits and GPCR types/subtypes in any given tissue or cell type, and this applies to the myocardium as well. A large number of studies have provided substantial evidence for the roles various RGS proteins expressed in cardiomyocytes play in cardiac physiology and heart disease pathophysiology. This review summarizes the current understanding of the functional roles of cardiac RGS proteins and their implications for the treatment of specific heart diseases, such as heart failure and atrial fibrillation. We focus on cardiac RGS4 in particular, since this isoform appears to be selectively (among the RGS protein family) upregulated in human heart failure and is also the target of ongoing drug discovery efforts for the treatment of a variety of diseases.
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Affiliation(s)
- Giselle Del Calvo
- Laboratory for the Study of Neurohormonal Control of the Circulation, Department of Pharmaceutical Sciences, Barry and Judy Silverman College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Teresa Baggio Lopez
- Laboratory for the Study of Neurohormonal Control of the Circulation, Department of Pharmaceutical Sciences, Barry and Judy Silverman College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Anastasios Lymperopoulos
- Laboratory for the Study of Neurohormonal Control of the Circulation, Department of Pharmaceutical Sciences, Barry and Judy Silverman College of Pharmacy, Nova Southeastern University, 3200 South University Drive, HPD (Terry) Building/Room 1350, Fort Lauderdale, FL 33328-2018, USA
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3
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Chan WKB, DasGupta D, Carlson HA, Traynor JR. Mixed-solvent molecular dynamics simulation-based discovery of a putative allosteric site on regulator of G protein signaling 4. J Comput Chem 2021; 42:2170-2180. [PMID: 34494289 DOI: 10.1002/jcc.26747] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 03/20/2021] [Revised: 06/19/2021] [Accepted: 07/25/2021] [Indexed: 11/07/2022]
Abstract
Regulator of G protein signaling 4 (RGS4) is an intracellular protein that binds to the Gα subunit ofheterotrimeric G proteins and aids in terminating G protein coupled receptor signaling. RGS4 has been implicated in pain, schizophrenia, and the control of cardiac contractility. Inhibitors of RGS4 have been developed but bind covalently to cysteine residues on the protein. Therefore, we sought to identify alternative druggable sites on RGS4 using mixed-solvent molecular dynamics simulations, which employ low concentrations of organic probes to identify druggable hotspots on the protein. Pseudo-ligands were placed in consensus hotspots, and perturbation with normal mode analysis led to the identification and characterization of a putative allosteric site, which would be invaluable for structure-based drug design of non-covalent, small molecule inhibitors. Future studies on the mechanism of this allostery will aid in the development of novel therapeutics targeting RGS4.
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Affiliation(s)
- Wallace K B Chan
- Department of Pharmacology, Edward F Domino Research Center, University of Michigan, Ann Arbor, Michigan, USA
| | - Debarati DasGupta
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Heather A Carlson
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - John R Traynor
- Department of Pharmacology, Edward F Domino Research Center, University of Michigan, Ann Arbor, Michigan, USA
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, Michigan, USA
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4
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Navarro-Lobato I, Masmudi-Martín M, López-Aranda MF, Quiros-Ortega ME, Carretero-Rey M, Garcia-Garrido MF, Gallardo-Martínez C, Martín-Montañez E, Gaona-Romero C, Delgado G, Torres-Garcia L, Terrón-Melguizo J, Posadas S, Muñoz LR, Rios CV, Zoidakis J, Vlahou A, López JC, Khan ZU. RGS14414-Mediated Activation of the 14-3-3ζ in Rodent Perirhinal Cortex Induces Dendritic Arborization, an Increase in Spine Number, Long-Lasting Memory Enhancement, and the Prevention of Memory Deficits. Cereb Cortex 2021; 32:1894-1910. [PMID: 34519346 DOI: 10.1093/cercor/bhab322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The remedy of memory deficits has been inadequate, as all potential candidates studied thus far have shown limited to no effects and a search for an effective strategy is ongoing. Here, we show that an expression of RGS14414 in rat perirhinal cortex (PRh) produced long-lasting object recognition memory (ORM) enhancement and that this effect was mediated through the upregulation of 14-3-3ζ, which caused a boost in BDNF protein levels and increase in pyramidal neuron dendritic arborization and dendritic spine number. A knockdown of the 14-3-3ζ gene in rat or the deletion of the BDNF gene in mice caused complete loss in ORM enhancement and increase in BDNF protein levels and neuronal plasticity, indicating that 14-3-3ζ-BDNF pathway-mediated structural plasticity is an essential step in RGS14414-induced memory enhancement. We further observed that RGS14414 treatment was able to prevent deficits in recognition, spatial, and temporal memory, which are types of memory that are particularly affected in patients with memory dysfunctions, in rodent models of aging and Alzheimer's disease. These results suggest that 14-3-3ζ-BDNF pathway might play an important role in the maintenance of the synaptic structures in PRh that support memory functions and that RGS14414-mediated activation of this pathway could serve as a remedy to treat memory deficits.
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Affiliation(s)
- Irene Navarro-Lobato
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Mariam Masmudi-Martín
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Manuel F López-Aranda
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - María E Quiros-Ortega
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Marta Carretero-Rey
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - María F Garcia-Garrido
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Carmen Gallardo-Martínez
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Elisa Martín-Montañez
- Department of Pharmacology, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Celia Gaona-Romero
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Gloria Delgado
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Laura Torres-Garcia
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Javier Terrón-Melguizo
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Sinforiano Posadas
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Lourdes Rodríguez Muñoz
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Carlos Vivar Rios
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain
| | - Jerome Zoidakis
- Biotechnology Division, Biomedical Research Foundation of the Academy of Athens, Athens 11527, Greece
| | - Antonia Vlahou
- Biotechnology Division, Biomedical Research Foundation of the Academy of Athens, Athens 11527, Greece
| | - Juan C López
- Animal Behavior and Neuroscience Lab., Department of Experimental Psychology, Faculty of Psychology, University of Seville, Seville 41018, Spain
| | - Zafar U Khan
- Laboratory of Neurobiology, CIMES, University of Malaga, Malaga 29010, Spain.,Department of Medicine, Faculty of Medicine, University of Malaga, Malaga 29010, Spain.,CIBERNED, Institute of Health Carlos III, Madrid 28031, Spain
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5
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Masmudi-Martín M, Navarro-Lobato I, López-Aranda MF, Browning PGF, Simón AM, López-Téllez JF, Jiménez-Recuerda I, Martín-Montañez E, Pérez-Mediavilla A, Frechilla D, Baxter MG, Khan ZU. Reversal of Object Recognition Memory Deficit in Perirhinal Cortex-Lesioned Rats and Primates and in Rodent Models of Aging and Alzheimer's Diseases. Neuroscience 2020; 448:287-298. [PMID: 32905841 DOI: 10.1016/j.neuroscience.2020.08.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 08/27/2020] [Accepted: 08/30/2020] [Indexed: 11/17/2022]
Abstract
The integrity of the perirhinal cortex (PRh) is essential for object recognition memory (ORM) function, and damage to this brain area in animals and humans induces irreversible ORM deficits. Here, we show that activation of area V2, a brain area interconnected with brain circuits of ventral stream and medial temporal lobe that sustain ORM, by expression of regulator of G-protein signaling 14 of 414 amino acids (RGS14414) restored ORM in memory-deficient PRh-lesioned rats and nonhuman primates. Furthermore, this treatment was sufficient for full recovery of ORM in rodent models of aging and Alzheimer's disease, conditions thought to affect multiple brain areas. Thus, RGS14414-mediated activation of area V2 has therapeutic relevance in the recovery of recognition memory, a type of memory that is primarily affected in patients or individuals with symptoms of memory dysfunction. These findings suggest that area V2 modulates the processing of memory-related information through activation of interconnected brain circuits formed by the participation of distinct brain areas.
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Affiliation(s)
- Mariam Masmudi-Martín
- Laboratory of Neurobiology, CIMES, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain; Department of Medicine, Faculty of Medicine, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain
| | - Irene Navarro-Lobato
- Laboratory of Neurobiology, CIMES, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain; Department of Medicine, Faculty of Medicine, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain
| | - Manuel F López-Aranda
- Laboratory of Neurobiology, CIMES, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain; Department of Medicine, Faculty of Medicine, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain
| | - Philip G F Browning
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1065, New York, NY 10029, United States
| | - Ana-María Simón
- Division of Neurosciences, CIMA, University of Navarra, Av. Pio XII 55, 31008 Pamplona, Spain
| | - Juan F López-Téllez
- Laboratory of Neurobiology, CIMES, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain; Department of Medicine, Faculty of Medicine, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain
| | - Inmaculada Jiménez-Recuerda
- Laboratory of Neurobiology, CIMES, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain; Department of Medicine, Faculty of Medicine, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain
| | - Elisa Martín-Montañez
- Department of Pharmacology, Faculty of Medicine, University of Malaga, Campus Teatinos s/n, Malaga, Spain; IBIMA, University of Malaga, 29071 Malaga, Spain
| | | | - Diana Frechilla
- Division of Neurosciences, CIMA, University of Navarra, Av. Pio XII 55, 31008 Pamplona, Spain
| | - Mark G Baxter
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1065, New York, NY 10029, United States
| | - Zafar U Khan
- Laboratory of Neurobiology, CIMES, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain; Department of Medicine, Faculty of Medicine, University of Malaga, Campus Teatinos s/n, 29071 Malaga, Spain; IBIMA, University of Malaga, 29071 Malaga, Spain; CIBERNED, Institute of Health Carlos III, Madrid, Spain.
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6
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Abstract
In animals, heterotrimeric guanine nucleotide-binding proteins (G proteins) transduce signals perceived by numerous G protein-coupled receptors (GPCRs). However, no canonical GPCRs with guanine nucleotide exchange factor (GEF) activity are present in plant genomes. Accumulated evidence indicates that, instead of GPCRs, the receptor-like kinases (RLKs) function upstream of G proteins in plants. Regulator of G protein signaling 1 (RGS1) functions to convert the GTP-bound Gα to the GDP-bound form through its GTPase-accelerating protein (GAP) activity. Because of the intrinsic differences in the biochemical properties between Arabidopsis and animal Gα, the actions of animal and Arabidopsis RGS1 result in contrasting outcomes in G signaling activation/deactivation. Animal RGSs accelerate the deactivation of the activated G signaling, whereas Arabidopsis RGS1 prevents the activation of G signaling in the resting state. Phosphorylation of Arabidopsis RGS1 triggered by ligand-RLK recognition results in the endocytosis or degradation of RGS1, leading to the separation of RGS1 from Gα and thus the derepression of G signaling. Here, we summarize the involvement of the G proteins in plant immunity, with a special focus on the molecular mechanism of G signaling activation/deactivation regulated by RLKs and RGS1. We also provide a brief perspective on the outstanding questions that need to be addressed to fully understand G signaling in plant immunity.
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Affiliation(s)
- Chen-Li Zhong
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang, China
| | - Chi Zhang
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang, China
| | - Jian-Zhong Liu
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang, China
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7
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Abstract
G protein-coupled receptor signaling mechanisms are implicated in many aspects of cardiovascular control, and dysfunction of such signaling mechanisms is commonly associated with disease states. Investigators have identified a large number of regulator of G protein signaling (RGS) proteins that variously contribute to the modulation of intracellular second-messenger signaling kinetics. These many RGS proteins each interact with a specific set of second-messenger cascades and receptor types and exhibit tissue-specific expression patterns. Increasing evidence supports the contribution of RGS proteins, or their loss, in the pathogenesis of cardiovascular dysfunctions. This review summarizes the current understanding of the functional contributions of RGS proteins, particularly within the B/R4 family, in cardiovascular disorders of pregnancy including gestational hypertension, uterine artery dysfunction, and preeclampsia.
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Affiliation(s)
| | - Guorui Deng
- Department of Pharmacology, University of Iowa , Iowa City, Iowa
| | - Rory A Fisher
- Department of Pharmacology, University of Iowa , Iowa City, Iowa
| | - Katherine N Gibson-Corley
- Department of Pathology, University of Iowa , Iowa City, Iowa
- UIHC Center for Hypertension Research, University of Iowa , Iowa City, Iowa
| | - Mark K Santillan
- Department of Obstetrics & Gynecology, University of Iowa , Iowa City, Iowa
- UIHC Center for Hypertension Research, University of Iowa , Iowa City, Iowa
- Abboud Cardiovascular Research Center, University of Iowa , Iowa City, Iowa
| | - Justin L Grobe
- Department of Pharmacology, University of Iowa , Iowa City, Iowa
- UIHC Center for Hypertension Research, University of Iowa , Iowa City, Iowa
- Abboud Cardiovascular Research Center, University of Iowa , Iowa City, Iowa
- Fraternal Order of Eagles' Diabetes Research Center, University of Iowa , Iowa City, Iowa
- Obesity Education & Research Initiative, University of Iowa , Iowa City, Iowa
- Iowa Neuroscience Institute, University of Iowa , Iowa City, Iowa
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8
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Chan EC, Ren C, Xie Z, Jude J, Barker T, Koziol-White CA, Ma M, Panettieri RA, Wu D, Rosenberg HF, Druey KM. Regulator of G protein signaling 5 restricts neutrophil chemotaxis and trafficking. J Biol Chem 2018; 293:12690-12702. [PMID: 29929985 DOI: 10.1074/jbc.ra118.002404] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 06/14/2018] [Indexed: 01/09/2023] Open
Abstract
Neutrophils are white blood cells that are mobilized to damaged tissues and to sites of pathogen invasion, providing the first line of host defense. Chemokines displayed on the surface of blood vessels promote migration of neutrophils to these sites, and tissue- and pathogen-derived chemoattractant signals, including N-formylmethionylleucylphenylalanine (fMLP), elicit further migration to sites of infection. Although nearly all chemoattractant receptors use heterotrimeric G proteins to transmit signals, many of the mechanisms lying downstream of chemoattractant receptors that either promote or limit neutrophil motility are incompletely defined. Here, we show that regulator of G protein signaling 5 (RGS5), a protein that modulates G protein activity, is expressed in both human and murine neutrophils. We detected significantly more neutrophils in the airways of Rgs5-/- mice than WT counterparts following acute respiratory virus infection and in the peritoneum in response to injection of thioglycollate, a biochemical proinflammatory stimulus. RGS5-deficient neutrophils responded with increased chemotaxis elicited by the chemokines CXC motif chemokine ligand 1 (CXCL1), CXCL2, and CXCL12 but not fMLP. Moreover, adhesion of these cells was increased in the presence of both CXCL2 and fMLP. In summary, our results indicate that RGS5 deficiency increases chemotaxis and adhesion, leading to more efficient neutrophil mobilization to inflamed tissues in mice. These findings suggest that RGS5 expression and activity in neutrophils determine their migrational patterns in the complex microenvironments characteristic of inflamed tissues.
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Affiliation(s)
- Eunice C Chan
- Molecular Signal Transduction Section, NIAID, National Institutes of Health, Bethesda, Maryland 20892
| | - Chunguang Ren
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06510
| | - Zhihui Xie
- Molecular Signal Transduction Section, NIAID, National Institutes of Health, Bethesda, Maryland 20892
| | - Joseph Jude
- Rutgers Institute for Translational Medicine and Science, Child Health Institute of New Jersey, Rutgers New Jersey School of Medicine, Rutgers, New Jersey 07103
| | - Tolga Barker
- Molecular Signal Transduction Section, NIAID, National Institutes of Health, Bethesda, Maryland 20892
| | - Cynthia A Koziol-White
- Rutgers Institute for Translational Medicine and Science, Child Health Institute of New Jersey, Rutgers New Jersey School of Medicine, Rutgers, New Jersey 07103
| | - Michelle Ma
- Inflammation Immunobiology Section, NIAID, National Institutes of Health, Bethesda, Maryland 20892
| | - Reynold A Panettieri
- Rutgers Institute for Translational Medicine and Science, Child Health Institute of New Jersey, Rutgers New Jersey School of Medicine, Rutgers, New Jersey 07103
| | - Dianqing Wu
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06510
| | - Helene F Rosenberg
- Inflammation Immunobiology Section, NIAID, National Institutes of Health, Bethesda, Maryland 20892
| | - Kirk M Druey
- Molecular Signal Transduction Section, NIAID, National Institutes of Health, Bethesda, Maryland 20892.
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9
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Hayes MP, Roman DL. Regulator of G Protein Signaling 17 as a Negative Modulator of GPCR Signaling in Multiple Human Cancers. AAPS J 2016; 18:550-9. [PMID: 26928451 DOI: 10.1208/s12248-016-9894-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 02/15/2016] [Indexed: 02/08/2023]
Abstract
Regulators of G protein signaling (RGS) proteins modulate G protein-coupled receptor (GPCR) signaling networks by terminating signals produced by active Gα subunits. RGS17, a member of the RZ subfamily of RGS proteins, is typically only expressed in appreciable amounts in the human central nervous system, but previous works have shown that RGS17 expression is selectively upregulated in a number of malignancies, including lung, breast, prostate, and hepatocellular carcinoma. In addition, this upregulation of RGS17 is associated with a more aggressive cancer phenotype, as increased proliferation, migration, and invasion are observed. Conversely, decreased RGS17 expression diminishes the response of ovarian cancer cells to agents commonly used during chemotherapy. These somewhat contradictory roles of RGS17 in cancer highlight the need for selective, high-affinity inhibitors of RGS17 to use as chemical probes to further the understanding of RGS17 biology. Based on current evidence, these compounds could potentially have clinical utility as novel chemotherapeutics in the treatment of lung, prostate, breast, and liver cancers. Recent advances in screening technologies to identify potential inhibitors coupled with increasing knowledge of the structural requirements of RGS-Gα protein-protein interaction inhibitors make the future of drug discovery efforts targeting RGS17 promising. This review highlights recent findings related to RGS17 as both a canonical and atypical RGS protein, its role in various human disease states, and offers insights on small molecule inhibition of RGS17.
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Affiliation(s)
- Michael P Hayes
- Department of Pharmaceutical Sciences and Experimental Therapeutics, University of Iowa, Iowa City, Iowa, USA
| | - David L Roman
- Department of Pharmaceutical Sciences and Experimental Therapeutics, University of Iowa, Iowa City, Iowa, USA. .,Cancer Signaling and Experimental Therapeutics Program, Holden Comprehensive Cancer Center, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA. .,, 115 S. Grand Avenue, S327 PHAR, Iowa City, Iowa, 52242, USA.
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10
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Abstract
This article reviews recent research into mechanisms underlying bone resorption and highlights avenues of investigation that may generate new therapies to combat alveolar bone loss in periodontitis. Several proteins, signaling pathways, stem cells, and dietary supplements are discussed as they relate to periodontal bone loss and regeneration. RGS12 is a crucial protein that mediates osteoclastogenesis and bone destruction, and a potential therapeutic target. RGS12 likely regulates osteoclast differentiation through regulating calcium influx to control the calcium oscillation-NFATc1 pathway. A working model for RGS10 and RGS12 in the regulation of Ca(2+) oscillations during osteoclast differentiation is proposed. Initiation of inflammation depends on host cell-microbe interactions, including the p38 mitogen-activated protein kinase (MAPK) signaling pathway. Oral p38 inhibitors reduced lipopolysaccharide (LPS)-induced bone destruction in a rat periodontitis model but showed unsatisfactory safety profiles. The p38 substrate MK2 is a more specific therapeutic target with potentially superior tolerability. Furthermore, MKP-1 shows anti-inflammatory activity, reducing inflammatory cytokine biosynthesis and bone resorption. Multipotent skeletal stem cell (SSC) populations exist within the bone marrow and periosteum of long bones. These bone-marrow-derived SSCs and periosteum-derived SSCs have shown therapeutic potential in several applications, including bone and periodontal regeneration. The existence of craniofacial bone-specific SSCs is suggested based on existing studies. The effects of calcium, vitamin D, and soy isoflavone supplementation on alveolar and skeletal bone loss in post-menopausal women were investigated. Supplementation resulted in stabilization of forearm bone mass density and a reduced rate of alveolar bone loss over 1 yr, compared with placebo. Periodontal attachment levels were also well-maintained and alveolar bone loss suppressed during 24 wk of supplementation.
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Affiliation(s)
- G Intini
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, 188 Longwood Avenue, REB 513, Boston, MA 02115, USA
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11
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Santhappan R, Crowder AT, Gouty S, Cox BM, Côté TE. Mu opioid receptor activation enhances regulator of G protein signaling 4 association with the mu opioid receptor/G protein complex in a GTP-dependent manner. J Neurochem 2015; 135:76-87. [PMID: 26119705 PMCID: PMC5034817 DOI: 10.1111/jnc.13222] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 06/19/2015] [Accepted: 06/25/2015] [Indexed: 11/26/2022]
Abstract
The interaction of Regulator of G protein Signaling 4 (RGS4) with the rat mu opioid receptor (MOR)/G protein complex was investigated. Solubilized MOR from rat brain membranes was immunoprecipitated in the presence of RGS4 with antibodies against the N-terminus of MOR (anti-MOR10-70 ). Activation of MOR with [D-Ala(2) , N-Me-Phe(4) , Gly(5) -ol] enkephalin (DAMGO) during immunoprecipitation caused a 150% increase in Goα and a 50% increase in RGS4 in the pellet. When 10 μM GTP was included with DAMGO, there was an additional 72% increase in RGS4 co-immunoprecipitating with MOR (p = 0.003). Guanosine 5'-O-(3-thiotriphosphate) (GTPγS) increased the amount of co-precipitating RGS4 by 93% (compared to DAMGO alone, p = 0.008), and the inclusion of GTPγS caused the ratio of MOR to RGS4 to be 1 : 1 (31 fmoles : 28 fmoles, respectively). GTPγS also increased the association of endogenous RGS4 with MOR. In His6 RGS4/Ni(2+) -NTA agarose pull down experiments, 0.3 μM GTPγS tripled the binding of Goα to His6 RGS4, whereas the addition of 100 μM GDP blocked this effect. Importantly, activation of solubilized MOR with DAMGO in the presence of 100 μM GDP and 0.3 μM GTPγS increased Goα binding to His6 RGS4/Ni(2+) -NTA agarose (p = 0.001). Regulators of G protein Signaling (RGS) shorten the time that G proteins are active. Activation of the mu opioid receptor (MOR) causes GTP to bind to and to activate Go (αoβγ). RGS4 then binds to the activated αo-GTP/MOR complex and accelerates the intrinsic GTPase of αo. After αo dissociates from MOR, RGS4 remains bound to the C-terminal region of MOR.
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Affiliation(s)
- Rema Santhappan
- Department of Pharmacology, The Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Alicia Tamara Crowder
- Department of Pharmacology, The Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.,Neuroscience Program, The Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Shawn Gouty
- Department of Pharmacology, The Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Brian M Cox
- Department of Pharmacology, The Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.,Neuroscience Program, The Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Thomas E Côté
- Department of Pharmacology, The Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.,Neuroscience Program, The Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
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12
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Masià-Balagué M, Izquierdo I, Garrido G, Cordomí A, Pérez-Benito L, Miller NLG, Schlaepfer DD, Gigoux V, Aragay AM. Gastrin-stimulated Gα13 Activation of Rgnef Protein (ArhGEF28) in DLD-1 Colon Carcinoma Cells. J Biol Chem 2015; 290:15197-209. [PMID: 25922072 DOI: 10.1074/jbc.m114.628164] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Indexed: 12/15/2022] Open
Abstract
The guanine nucleotide exchange factor Rgnef (also known as ArhGEF28 or p190RhoGEF) promotes colon carcinoma cell motility and tumor progression via interaction with focal adhesion kinase (FAK). Mechanisms of Rgnef activation downstream of integrin or G protein-coupled receptors remain undefined. In the absence of a recognized G protein signaling homology domain in Rgnef, no proximal linkage to G proteins was known. Utilizing multiple methods, we have identified Rgnef as a new effector for Gα13 downstream of gastrin and the type 2 cholecystokinin receptor. In DLD-1 colon carcinoma cells depleted of Gα13, gastrin-induced FAK Tyr(P)-397 and paxillin Tyr(P)-31 phosphorylation were reduced. RhoA GTP binding and promoter activity were increased by Rgnef in combination with active Gα13. Rgnef co-immunoprecipitated with activated Gα13Q226L but not Gα12Q229L. The Rgnef C-terminal (CT, 1279-1582) region was sufficient for co-immunoprecipitation, and Rgnef-CT exogenous expression prevented Gα13-stimulated SRE activity. A domain at the C terminus of the protein close to the FAK binding domain is necessary to bind to Gα13. Point mutations of Rgnef-CT residues disrupt association with active Gα13 but not Gαq. These results show that Rgnef functions as an effector of Gα13 signaling and that this linkage may mediate FAK activation in DLD-1 colon carcinoma cells.
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Affiliation(s)
- Miriam Masià-Balagué
- From the Molecular Biology Institute of Barcelona, Spanish National Research Council (CSIC), 08028 Barcelona, Spain
| | - Ismael Izquierdo
- From the Molecular Biology Institute of Barcelona, Spanish National Research Council (CSIC), 08028 Barcelona, Spain
| | - Georgina Garrido
- From the Molecular Biology Institute of Barcelona, Spanish National Research Council (CSIC), 08028 Barcelona, Spain
| | - Arnau Cordomí
- the Departament de Pediatria, Unitat de Bioestadística, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain
| | - Laura Pérez-Benito
- the Departament de Pediatria, Unitat de Bioestadística, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain
| | - Nichol L G Miller
- the Université Paul Sabatier Réceptologie et Ciblage Thérapeutique en Cancérologie, INSERM, Toulouse, France, and
| | - David D Schlaepfer
- the Université Paul Sabatier Réceptologie et Ciblage Thérapeutique en Cancérologie, INSERM, Toulouse, France, and
| | - Véronique Gigoux
- the Moores Cancer Center, University of California at San Diego, La Jolla, California 92093
| | - Anna M Aragay
- From the Molecular Biology Institute of Barcelona, Spanish National Research Council (CSIC), 08028 Barcelona, Spain,
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13
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Zuo H, Chan ASL, Ammer H, Wong YH. Activation of Gαq subunits up-regulates the expression of the tumor suppressor Fhit. Cell Signal 2013; 25:2440-52. [PMID: 23993961 DOI: 10.1016/j.cellsig.2013.08.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 08/24/2013] [Indexed: 12/31/2022]
Abstract
The tumor suppressor Fhit protein is defective or absent in many tumor cells due to methylation, mutation or deletion of the FHIT gene. Despite numerous attempts to unravel the functions of Fhit, the mechanisms by which the function and expression of Fhit are regulated remain poorly understood. We have recently shown that activated Gαq subunits interact directly with Fhit and enhance its inhibitory effect on cell growth. Here we investigated the regulation of Fhit expression by Gq. Our results showed that Fhit was up-regulated specifically by activating Gα subunits of the Gq subfamily but not by those of the other G protein subfamilies. This up-regulation effect was mediated by a PKC/MEK pathway independent of Src-mediated Fhit Tyr(114) phosphorylation. We further demonstrated that elevated Fhit expression was due to the specific regulation of Fhit protein synthesis in the ribosome by activated Gαq, where the regulations of cap-dependent protein synthesis were apparently not required. Moreover, we showed that activated Gαq could increase cell-cell adhesion through Fhit. These findings provide a possible handle to modulate the level of the Fhit tumor suppressor by manipulating the activity of Gq-coupled receptors.
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Affiliation(s)
- Hao Zuo
- Division of Life Sciences, and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
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