1
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Mughal A, Sackheim AM, Koide M, Bonson G, Ebner G, Hennig G, Lockette W, Nelson MT, Freeman K. Pathogenic soluble tau peptide disrupts endothelial calcium signaling and vasodilation in the brain microvasculature. J Cereb Blood Flow Metab 2024; 44:680-688. [PMID: 38420777 PMCID: PMC11197144 DOI: 10.1177/0271678x241235790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 01/03/2024] [Accepted: 01/27/2024] [Indexed: 03/02/2024]
Abstract
The accumulation of the microtubule-associated tau protein in and around blood vessels contributes to brain microvascular dysfunction through mechanisms that are incompletely understood. Delivery of nutrients to active neurons in the brain relies on capillary calcium (Ca2+) signals to direct blood flow. The initiation and amplification of endothelial cell Ca2+ signals require an intact microtubule cytoskeleton. Since tau accumulation in endothelial cells disrupts native microtubule stability, we reasoned that tau-induced microtubule destabilization would impair endothelial Ca2+ signaling. We tested the hypothesis that tau disrupts the regulation of local cerebral blood flow by reducing endothelial cell Ca2+ signals and endothelial-dependent vasodilation. We used a pathogenic soluble tau peptide (T-peptide) model of tau aggregation and mice with genetically encoded endothelial Ca2+ sensors to measure cerebrovascular endothelial responses to tau exposure. T-peptide significantly attenuated endothelial Ca2+ activity and cortical capillary blood flow in vivo. Further, T-peptide application constricted pressurized cerebral arteries and inhibited endothelium-dependent vasodilation. This study demonstrates that pathogenic tau alters cerebrovascular function through direct attenuation of endothelial Ca2+ signaling and endothelium-dependent vasodilation.
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Affiliation(s)
- Amreen Mughal
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
| | - Adrian M Sackheim
- Department of Emergency Medicine, University of Vermont, Burlington, VT, USA
| | - Masayo Koide
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
| | - Grace Bonson
- Department of Emergency Medicine, University of Vermont, Burlington, VT, USA
| | - Grace Ebner
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
| | - Grant Hennig
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
| | - Warren Lockette
- Division of Endocrinology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Mark T Nelson
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
- Division of Cardiovascular Sciences, University of Manchester, Manchester, UK
| | - Kalev Freeman
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
- Department of Emergency Medicine, University of Vermont, Burlington, VT, USA
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2
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Mukhopadhyay A, Tsukasaki Y, Chan WC, Le JP, Kwok ML, Zhou J, Natarajan V, Mostafazadeh N, Maienschein-Cline M, Papautsky I, Tiruppathi C, Peng Z, Rehman J, Ganesh B, Komarova Y, Malik AB. trans-Endothelial neutrophil migration activates bactericidal function via Piezo1 mechanosensing. Immunity 2024; 57:52-67.e10. [PMID: 38091995 PMCID: PMC10872880 DOI: 10.1016/j.immuni.2023.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 08/02/2023] [Accepted: 11/10/2023] [Indexed: 12/21/2023]
Abstract
The regulation of polymorphonuclear leukocyte (PMN) function by mechanical forces encountered during their migration across restrictive endothelial cell junctions is not well understood. Using genetic, imaging, microfluidic, and in vivo approaches, we demonstrated that the mechanosensor Piezo1 in PMN plasmalemma induced spike-like Ca2+ signals during trans-endothelial migration. Mechanosensing increased the bactericidal function of PMN entering tissue. Mice in which Piezo1 in PMNs was genetically deleted were defective in clearing bacteria, and their lungs were predisposed to severe infection. Adoptive transfer of Piezo1-activated PMNs into the lungs of Pseudomonas aeruginosa-infected mice or exposing PMNs to defined mechanical forces in microfluidic systems improved bacterial clearance phenotype of PMNs. Piezo1 transduced the mechanical signals activated during transmigration to upregulate nicotinamide adenine dinucleotide phosphate (NADPH) oxidase 4, crucial for the increased PMN bactericidal activity. Thus, Piezo1 mechanosensing of increased PMN tension, while traversing the narrow endothelial adherens junctions, is a central mechanism activating the host-defense function of transmigrating PMNs.
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Affiliation(s)
- Amitabha Mukhopadhyay
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Yoshikazu Tsukasaki
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Wan Ching Chan
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Jonathan P Le
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Man Long Kwok
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Jian Zhou
- Richard and Loan Hill Department of Biomedical Engineering, University of Illinois, Chicago, IL 60612, USA
| | - Viswanathan Natarajan
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA; Department of Medicine, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Nima Mostafazadeh
- Richard and Loan Hill Department of Biomedical Engineering, University of Illinois, Chicago, IL 60612, USA
| | - Mark Maienschein-Cline
- Research Informatics Core, Research Resources Center, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Ian Papautsky
- Richard and Loan Hill Department of Biomedical Engineering, University of Illinois, Chicago, IL 60612, USA
| | - Chinnaswamy Tiruppathi
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Zhangli Peng
- Richard and Loan Hill Department of Biomedical Engineering, University of Illinois, Chicago, IL 60612, USA
| | - Jalees Rehman
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Balaji Ganesh
- Flow Cytometry Core, Research Resources Center, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Yulia Komarova
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA.
| | - Asrar B Malik
- Department of Pharmacology and Regenerative Medicine and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA.
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3
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Wu L, Chen J. Type 3 IP3 receptor: Its structure, functions, and related disease implications. Channels (Austin) 2023; 17:2267416. [PMID: 37818548 PMCID: PMC10569359 DOI: 10.1080/19336950.2023.2267416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 10/02/2023] [Indexed: 10/12/2023] Open
Abstract
Cell-fate decisions depend on the precise and strict regulation of multiple signaling molecules and transcription factors, especially intracellular Ca2+ homeostasis and dynamics. Type 3 inositol 1,4,5-triphosphate receptor (IP3R3) is an a tetrameric channel that can mediate the release of Ca2+ from the endoplasmic reticulum (ER) in response to extracellular stimuli. The gating of IP3R3 is regulated not only by ligands but also by other interacting proteins. To date, extensive research conducted on the basic structure of IP3R3, as well as its regulation by ligands and interacting proteins, has provided novel perspectives on its biological functions and pathogenic mechanisms. This review aims to discuss recent advancements in the study of IP3R3 and provides a comprehensive overview of the relevant literature pertaining to its structure, biological functions, and pathogenic mechanisms.
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Affiliation(s)
- Lvying Wu
- Institute of Clinical Medicine, The Second Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Jin Chen
- Institute of Clinical Medicine, The Second Affiliated Hospital of Hainan Medical University, Haikou, China
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4
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Lee Q, Chan WC, Qu X, Sun Y, Abdelkarim H, Le J, Saqib U, Sun MY, Kruse K, Banerjee A, Hitchinson B, Geyer M, Huang F, Guaiquil V, Mutso AA, Sanders M, Rosenblatt MI, Maienschein-Cline M, Lawrence MS, Gaponenko V, Malik AB, Komarova YA. End binding-3 inhibitor activates regenerative program in age-related macular degeneration. Cell Rep Med 2023; 4:101223. [PMID: 37794584 PMCID: PMC10591057 DOI: 10.1016/j.xcrm.2023.101223] [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: 08/22/2020] [Revised: 07/19/2023] [Accepted: 09/12/2023] [Indexed: 10/06/2023]
Abstract
Wet age-related macular degeneration (AMD), characterized by leaky neovessels emanating from the choroid, is a main cause of blindness. As current treatments for wet AMD require regular intravitreal injections of anti-vascular endothelial growth factor (VEGF) biologics, there is a need for the development of less invasive treatments. Here, we designed an allosteric inhibitor of end binding-3 (EB3) protein, termed EBIN, which reduces the effects of environmental stresses on endothelial cells by limiting pathological calcium signaling. Delivery of EBIN via eye drops in mouse and non-human primate (NHP) models of wet AMD prevents both neovascular leakage and choroidal neovascularization. EBIN reverses the epigenetic changes induced by environmental stresses, allowing an activation of a regenerative program within metabolic-active endothelial cells comprising choroidal neovascularization (CNV) lesions. These results suggest the therapeutic potential of EBIN in preventing the degenerative processes underlying wet AMD.
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Affiliation(s)
- Quinn Lee
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Wan Ching Chan
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Xinyan Qu
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Ying Sun
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | | | - Jonathan Le
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Uzma Saqib
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Mitchell Y Sun
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Kevin Kruse
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Avik Banerjee
- Department of Chemistry, The University of Illinois, Chicago, IL 60612, USA
| | - Ben Hitchinson
- Department of Biochemistry and Molecular Genetics, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Melissa Geyer
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Fei Huang
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Victor Guaiquil
- Department of Ophthalmology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Amelia A Mutso
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | | | - Mark I Rosenblatt
- Department of Ophthalmology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | | | | | - Vadim Gaponenko
- Department of Biochemistry and Molecular Genetics, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Asrar B Malik
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Yulia A Komarova
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA.
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5
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Kwok ML, Geyer M, Chan WC, Zhao S, Gu L, Huang F, Vogel SM, Petukhov PA, Komarova Y. Targeting EB3-IP 3R3 Interface with Cognate Peptide Protects from Acute Respiratory Distress Syndrome. Am J Respir Cell Mol Biol 2023; 69:391-403. [PMID: 37290041 PMCID: PMC10557916 DOI: 10.1165/rcmb.2022-0217oc] [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: 05/24/2022] [Accepted: 06/08/2023] [Indexed: 06/10/2023] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a lung disease characterized by acute onset of noncardiogenic pulmonary edema, hypoxemia, and respiratory insufficiency. The current treatment for ARDS is mainly supportive in nature, providing a critical need for targeted pharmacological management. We addressed this medical problem by developing a pharmacological treatment for pulmonary vascular leakage, a culprit of alveolar damage and lung inflammation. Our novel therapeutic target is the microtubule accessory factor EB3 (end binding protein 3), which contributes to pulmonary vascular leakage by amplifying pathological calcium signaling in endothelial cells in response to inflammatory stimuli. EB3 interacts with IP3R3 (inositol 1,4,5-trisphosphate receptor 3) and orchestrates calcium release from endoplasmic reticulum stores. Here, we designed and tested the therapeutic benefits of a 14-aa peptide named CIPRI (cognate IP3 receptor inhibitor), which disrupted EB3-IP3R3 interaction in vitro and in lungs of mice challenged with endotoxin. Treatment with CIPRI or depletion of IP3R3 in lung microvascular endothelial monolayers mitigated calcium release from endoplasmic reticulum stores and prevented a disassembly of vascular endothelial cadherin junctions in response to the proinflammatory mediator α-thrombin. Furthermore, intravenous administration of CIPRI in mice mitigated inflammation-induced lung injury, blocked pulmonary microvascular leakage, prevented activation of NFAT (nuclear factor of activated T cells) signaling, and reduced production of proinflammatory cytokines in the lung tissue. CIPRI also improved survival of mice from endotoxemia and polymicrobial sepsis. Together, these data demonstrate that targeting EB3-IP3R3 interaction with a cognate peptide is a promising strategy to address hyperpermeability of microvessels in inflammatory lung diseases.
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Affiliation(s)
- Man Long Kwok
- Department of Pharmacology and Regenerative Medicine, College of Medicine, and
| | - Melissa Geyer
- Department of Pharmacology and Regenerative Medicine, College of Medicine, and
| | - Wan Ching Chan
- Department of Pharmacology and Regenerative Medicine, College of Medicine, and
| | - Shuangping Zhao
- Department of Pharmacology and Regenerative Medicine, College of Medicine, and
| | - Lianzhi Gu
- Department of Pharmacology and Regenerative Medicine, College of Medicine, and
| | - Fei Huang
- Department of Pharmacology and Regenerative Medicine, College of Medicine, and
| | - Steven M. Vogel
- Department of Pharmacology and Regenerative Medicine, College of Medicine, and
| | - Pavel A. Petukhov
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois
| | - Yulia Komarova
- Department of Pharmacology and Regenerative Medicine, College of Medicine, and
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6
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Takyar SS. Against the Waves: Blocking the EB3-IP3 Interaction Inhibits Calcium Waves in the Lung Endothelium. Am J Respir Cell Mol Biol 2023; 69:371-372. [PMID: 37348847 PMCID: PMC10557917 DOI: 10.1165/rcmb.2023-0197ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 06/22/2023] [Indexed: 06/24/2023] Open
Affiliation(s)
- Shervin S Takyar
- Pulmonary Critical Care and Sleep Medicine Section Department of Internal Medicine Yale University School of Medicine New Haven, Connecticut
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7
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Freeman K, Sackheim AM, Mughal A, Koide M, Bonson G, Ebner G, Hennig G, Lockette W, Nelson MT. Pathogenic soluble tau peptide disrupts endothelial calcium signaling and vasodilation in the brain microvasculature. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.08.552492. [PMID: 37609200 PMCID: PMC10441279 DOI: 10.1101/2023.08.08.552492] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
The accumulation of the microtubule-associated tau protein in and around blood vessels contributes to brain microvascular dysfunction through mechanisms that are incompletely understood. Delivery of nutrients to active neurons in the brain relies on capillary inositol 1,4,5-triphosphate receptor (IP3R)-mediated calcium (Ca2+) signals to direct blood flow. The initiation and amplification of endothelial cell IP3R-mediated Ca2+ signals requires an intact microtubule cytoskeleton. Since tau accumulation in endothelial cells disrupts native microtubule stability, we reasoned that tau-induced microtubule destabilization would impair endothelial IP3-evoked Ca2+ signaling. We tested the hypothesis that tau disrupts the regulation of local cerebral blood flow by reducing endothelial cell Ca2+ signals and endothelial-dependent vasodilation. We used a pathogenic soluble tau peptide (T-peptide) model of tau aggregation and mice with genetically encoded endothelial Ca2+ sensors to measure cerebrovascular endothelial responses to tau exposure. T-peptide significantly attenuated endothelial Ca2+ activity and cortical capillary blood flow in vivo within 120 seconds. Further, T-peptide application constricted pressurized cerebral arteries and inhibited endothelium-dependent vasodilation. This study demonstrates that pathogenic tau alters cerebrovascular function through direct attenuation of endothelial Ca2+ signaling and endothelium-dependent vasodilation.
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Affiliation(s)
- Kalev Freeman
- Department of Emergency Medicine, University of Vermont, Burlington, VT, USA
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
| | - Adrian M Sackheim
- Department of Emergency Medicine, University of Vermont, Burlington, VT, USA
| | - Amreen Mughal
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
| | - Masayo Koide
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
| | - Grace Bonson
- Department of Emergency Medicine, University of Vermont, Burlington, VT, USA
| | - Grace Ebner
- Department of Emergency Medicine, University of Vermont, Burlington, VT, USA
| | - Grant Hennig
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
| | - Warren Lockette
- Division of Endocrinology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Mark T Nelson
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
- Division of Cardiovascular Sciences, University of Manchester, Manchester, UK
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8
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Santana Nunez D, Malik AB, Lee Q, Ahn SJ, Coctecon-Murillo A, Lazarko D, Levitan I, Mehta D, Komarova YA. Piezo1 induces endothelial responses to shear stress via soluble adenylyl Cyclase-IP 3R2 circuit. iScience 2023; 26:106661. [PMID: 37168565 PMCID: PMC10164902 DOI: 10.1016/j.isci.2023.106661] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 01/30/2023] [Accepted: 04/07/2023] [Indexed: 05/13/2023] Open
Abstract
Endothelial cells (ECs) continuously sense and adapt to changes in shear stress generated by blood flow. Here, we show that the activation of the mechanosensitive channel Piezo1 by defined shear forces induces Ca2+ entry into the endoplasmic reticulum (ER) via the ER Ca2+ ATPase pump. This entry is followed by inositol trisphosphate receptor 2 (IP3R2)-elicited ER Ca2+ release into the cytosol. The mechanism of ER Ca2+ release involves the generation of cAMP by soluble adenylyl cyclase (sAC), leading to IP3R2-evoked Ca2+ gating. Depleting sAC or IP3R2 prevents ER Ca2+ release and blocks EC alignment in the direction of flow. Overexpression of constitutively active Akt1 restores the shear-induced alignment of ECs lacking Piezo1 or IP3R2, as well as the flow-induced vasodilation in endothelial restricted Piezo1 knockout mice. These studies describe an unknown Piezo1-cAMP-IP3R2 circuit as an essential mechanism activating Akt signaling and inducing adaptive changes in ECs to laminar flow.
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Affiliation(s)
- Dianicha Santana Nunez
- Department of Pharmacology and Regenerative Medicine, the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL, USA
| | - Asrar B. Malik
- Department of Pharmacology and Regenerative Medicine, the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL, USA
| | - Quinn Lee
- Department of Pharmacology and Regenerative Medicine, the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL, USA
| | - Sang Joon Ahn
- Department of Medicine, University of Illinois College of Medicine, Chicago, IL, USA
| | - Arnold Coctecon-Murillo
- Department of Pharmacology and Regenerative Medicine, the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL, USA
| | - Dana Lazarko
- Department of Medicine, University of Illinois College of Medicine, Chicago, IL, USA
| | - Irena Levitan
- Department of Medicine, University of Illinois College of Medicine, Chicago, IL, USA
| | - Dolly Mehta
- Department of Pharmacology and Regenerative Medicine, the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL, USA
| | - Yulia A. Komarova
- Department of Pharmacology and Regenerative Medicine, the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL, USA
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9
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LPA suppresses T cell function by altering the cytoskeleton and disrupting immune synapse formation. Proc Natl Acad Sci U S A 2022; 119:e2118816119. [PMID: 35394866 PMCID: PMC9169816 DOI: 10.1073/pnas.2118816119] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Cancer and chronic infections often increase levels of the bioactive lipid, lysophosphatidic acid (LPA), that we have demonstrated acts as an inhibitory ligand upon binding LPAR5 on CD8 T cells, suppressing cytotoxic activity and tumor control. This study, using human and mouse primary T lymphocytes, reveals how LPA disrupts antigen-specific CD8 T cell:target cell immune synapse (IS) formation and T cell function via competing for cytoskeletal regulation. Specifically, we find upon antigen-specific T cell:target cell formation, IP3R1 localizes to the IS by a process dependent on mDia1 and actin and microtubule polymerization. LPA not only inhibited IP3R1 from reaching the IS but also altered T cell receptor (TCR)–induced localization of RhoA and mDia1 impairing F-actin accumulation and altering the tubulin code. Consequently, LPA impeded calcium store release and IS-directed cytokine secretion. Thus, targeting LPA signaling in chronic inflammatory conditions may rescue T cell function and promote antiviral and antitumor immunity.
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10
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CRACking the Molecular Regulatory Mechanism of SOCE during Platelet Activation in Thrombo-Occlusive Diseases. Cells 2022; 11:cells11040619. [PMID: 35203269 PMCID: PMC8870035 DOI: 10.3390/cells11040619] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 01/31/2022] [Accepted: 02/09/2022] [Indexed: 11/16/2022] Open
Abstract
Thrombo-occlusive diseases such as myocardial infarction, ischemic stroke and deep vein thrombosis with subsequent pulmonary embolism still represent a major health burden worldwide. Besides the cells of the vasculature or other hematopoietic cells, platelets are primarily responsible for the development and progression of an occluding thrombus. The activation and function of platelets crucially depend on free cytosolic calcium (Ca2+) as second messenger, which modulates platelet secretion, aggregation and thrombus formation. Ca2+ is elevated upon platelet activation by release of Ca2+ from intracellular stores thus triggering of the subsequent store-operated Ca2+ entry (SOCE), which is facilitated by Ca2+ release-activated channels (CRACs). In general, CRACs are assembled by the pore-forming unit Orai in the plasma membrane and the Ca2+-sensing stromal interaction molecule (STIM) in the endoplasmic reticulum after the depletion of internal Ca2+ stores. In the last few years, there is a growing body of the literature demonstrating the importance of STIM and Orai-mediated mechanism in thrombo-occlusive disorders. Thus, this review provides an overview of the recent understanding of STIM and Orai signaling in platelet function and its implication in the development and progression of ischemic thrombo-occlusive disorders. Moreover, potential pharmacological implications of STIM and Orai signaling in platelets are anticipated and discussed in the end.
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11
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Bustos G, Ahumada-Castro U, Silva-Pavez E, Puebla A, Lovy A, Cesar Cardenas J. The ER-mitochondria Ca 2+ signaling in cancer progression: Fueling the monster. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2021; 363:49-121. [PMID: 34392932 DOI: 10.1016/bs.ircmb.2021.03.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cancer is a leading cause of death worldwide. All major tumor suppressors and oncogenes are now recognized to have fundamental connections with metabolic pathways. A hallmark feature of cancer cells is a reprogramming of their metabolism even when nutrients are available. Increasing evidence indicates that most cancer cells rely on mitochondrial metabolism to sustain their energetic and biosynthetic demands. Mitochondria are functionally and physically coupled to the endoplasmic reticulum (ER), the major calcium (Ca2+) storage organelle in mammalian cells, through special domains known as mitochondria-ER contact sites (MERCS). In this domain, the release of Ca2+ from the ER is mainly regulated by inositol 1,4,5-trisphosphate (IP3) receptors (IP3Rs), a family of Ca2+ release channels activated by the ligand IP3. IP3R mediated Ca2+ release is transferred to mitochondria through the mitochondrial Ca2+ uniporter (MCU). Once in the mitochondrial matrix, Ca2+ activates several proteins that stimulate mitochondrial performance. The role of IP3R and MCU in cancer, as well as the other proteins that enable the Ca2+ communication between these two organelles is just beginning to be understood. Here, we describe the function of the main players of the ER mitochondrial Ca2+ communication and discuss how this particular signal may contribute to the rise and development of cancer traits.
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Affiliation(s)
- Galdo Bustos
- Faculty of Sciences, Universidad Mayor, Center for Integrative Biology, Santiago, Chile; Geroscience Center for Brain Health and Metabolism, Santiago, Chile
| | - Ulises Ahumada-Castro
- Faculty of Sciences, Universidad Mayor, Center for Integrative Biology, Santiago, Chile; Geroscience Center for Brain Health and Metabolism, Santiago, Chile
| | - Eduardo Silva-Pavez
- Faculty of Sciences, Universidad Mayor, Center for Integrative Biology, Santiago, Chile; Geroscience Center for Brain Health and Metabolism, Santiago, Chile
| | - Andrea Puebla
- Faculty of Sciences, Universidad Mayor, Center for Integrative Biology, Santiago, Chile; Geroscience Center for Brain Health and Metabolism, Santiago, Chile
| | - Alenka Lovy
- Faculty of Sciences, Universidad Mayor, Center for Integrative Biology, Santiago, Chile; Geroscience Center for Brain Health and Metabolism, Santiago, Chile; Department of Neuroscience, Center for Neuroscience Research, Tufts School of Medicine, Boston, MA, United States.
| | - J Cesar Cardenas
- Faculty of Sciences, Universidad Mayor, Center for Integrative Biology, Santiago, Chile; Geroscience Center for Brain Health and Metabolism, Santiago, Chile; Buck Institute for Research on Aging, Novato, CA, United States; Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, United States.
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12
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Wolpe AG, Ruddiman CA, Hall PJ, Isakson BE. Polarized Proteins in Endothelium and Their Contribution to Function. J Vasc Res 2021; 58:65-91. [PMID: 33503620 DOI: 10.1159/000512618] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 10/27/2020] [Indexed: 12/11/2022] Open
Abstract
Protein localization in endothelial cells is tightly regulated to create distinct signaling domains within their tight spatial restrictions including luminal membranes, abluminal membranes, and interendothelial junctions, as well as caveolae and calcium signaling domains. Protein localization in endothelial cells is also determined in part by the vascular bed, with differences between arteries and veins and between large and small arteries. Specific protein polarity and localization is essential for endothelial cells in responding to various extracellular stimuli. In this review, we examine protein localization in the endothelium of resistance arteries, with occasional references to other vessels for contrast, and how that polarization contributes to endothelial function and ultimately whole organism physiology. We highlight the protein localization on the luminal surface, discussing important physiological receptors and the glycocalyx. The protein polarization to the abluminal membrane is especially unique in small resistance arteries with the presence of the myoendothelial junction, a signaling microdomain that regulates vasodilation, feedback to smooth muscle cells, and ultimately total peripheral resistance. We also discuss the interendothelial junction, where tight junctions, adherens junctions, and gap junctions all convene and regulate endothelial function. Finally, we address planar cell polarity, or axial polarity, and how this is regulated by mechanosensory signals like blood flow.
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Affiliation(s)
- Abigail G Wolpe
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA.,Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Claire A Ruddiman
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA.,Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Phillip J Hall
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA, .,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, USA,
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13
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Ma X, Liu W. Calcium signaling in brain microvascular endothelial cells and its roles in the function of the blood-brain barrier. Neuroreport 2020; 30:1271-1277. [PMID: 31688421 DOI: 10.1097/wnr.0000000000001357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The blood-brain barrier (BBB) plays critical roles in maintaining the stability of the brain's internal milieu, providing nutrients for the brain, and preventing toxic materials from the blood from entering the brain. The cellular structure of the BBB is mainly composed of brain microvascular endothelial cells (BMVECs), which are surrounded by astrocytic endfeet that are connected by tight junction proteins, pericytes and astrocytes. Recently, several studies have shown that aberrant increase in intracellular calcium levels in BMVECs lead to cellular metabolic disturbances and subsequent impairment of BBB integrity. Although multiple stresses can lead to intracellular calcium accumulation, inherent protective mechanisms in affected cells are subsequently activated to maintain calcium homeostasis. However, once the increase in intracellular calcium goes beyond a certain threshold, disturbances in cellular structures, protein expression, and the BBB permeability are inevitable. Here, we review recent research on the different factors regulating intracellular calcium concentrations and the mechanisms related to how calcium signaling cascades protect the BMVECs from outside injury. We also consider the potential of calcium signaling regulators as therapeutic targets for modulating intracellular calcium homeostasis and ameliorating BBB disruption in patients with calcium-related pathologies.
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Affiliation(s)
- Xingjie Ma
- Department of Intensive Care, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
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14
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Abdelkarim H, Hitchinson B, Qu X, Banerjee A, Komarova YA, Gaponenko V. NMR resonance assignment and structure prediction of the C-terminal domain of the microtubule end-binding protein 3. PLoS One 2020; 15:e0232338. [PMID: 32421702 PMCID: PMC7233555 DOI: 10.1371/journal.pone.0232338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 04/13/2020] [Indexed: 11/29/2022] Open
Abstract
End-binding proteins (EBs) associate with the growing microtubule plus ends to regulate microtubule dynamics as well as the interaction with intracellular structures. EB3 contributes to pathological vascular leakage through interacting with the inositol 1,4,5-trisphosphate receptor 3 (IP3R3), a calcium channel located at the endoplasmic reticulum membrane. The C-terminal domain of EB3 (residues 200–281) is functionally important for this interaction because it contains the effector binding sites, a prerequisite for EB3 activity and specificity. Structural data for this domain is limited. Here, we report the backbone chemical shift assignments for the human EB3 C-terminal domain and computationally explore its EB3 conformations. Backbone assignments, along with computational models, will allow future investigation of EB3 structural dynamics, interactions with effectors, and will facilitate the development of novel EB3 inhibitors.
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Affiliation(s)
- Hazem Abdelkarim
- Department of Biochemistry and Molecular Genetics, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Ben Hitchinson
- Department of Biochemistry and Molecular Genetics, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Xinyan Qu
- Department of Pharmacology and the Center for Lung Biology, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Avik Banerjee
- Department of Chemistry, University of Illinois, Chicago, IL, United States of America
| | - Yulia A. Komarova
- Department of Pharmacology and the Center for Lung Biology, University of Illinois at Chicago, Chicago, IL, United States of America
- * E-mail: (YAK); (VG)
| | - Vadim Gaponenko
- Department of Biochemistry and Molecular Genetics, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
- * E-mail: (YAK); (VG)
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15
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Tran QK. Reciprocality Between Estrogen Biology and Calcium Signaling in the Cardiovascular System. Front Endocrinol (Lausanne) 2020; 11:568203. [PMID: 33133016 PMCID: PMC7550652 DOI: 10.3389/fendo.2020.568203] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 08/19/2020] [Indexed: 12/30/2022] Open
Abstract
17β-Estradiol (E2) is the main estrogenic hormone in the body and exerts many cardiovascular protective effects. Via three receptors known to date, including estrogen receptors α (ERα) and β (ERβ) and the G protein-coupled estrogen receptor 1 (GPER, aka GPR30), E2 regulates numerous calcium-dependent activities in cardiovascular tissues. Nevertheless, effects of E2 and its receptors on components of the calcium signaling machinery (CSM), the underlying mechanisms, and the linked functional impact are only beginning to be elucidated. A picture is emerging of the reciprocality between estrogen biology and Ca2+ signaling. Therein, E2 and GPER, via both E2-dependent and E2-independent actions, moderate Ca2+-dependent activities; in turn, ERα and GPER are regulated by Ca2+ at the receptor level and downstream signaling via a feedforward loop. This article reviews current understanding of the effects of E2 and its receptors on the cardiovascular CSM and vice versa with a focus on mechanisms and combined functional impact. An overview of the main CSM components in cardiovascular tissues will be first provided, followed by a brief review of estrogen receptors and their Ca2+-dependent regulation. The effects of estrogenic agonists to stimulate acute Ca2+ signals will then be reviewed. Subsequently, E2-dependent and E2-independent effects of GPER on components of the Ca2+ signals triggered by other stimuli will be discussed. Finally, a case study will illustrate how the many mechanisms are coordinated to moderate Ca2+-dependent activities in the cardiovascular system.
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16
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Abstract
In the body, extracellular stimuli produce inositol 1,4,5-trisphosphate (IP3), an intracellular chemical signal that binds to the IP3 receptor (IP3R) to release calcium ions (Ca2+) from the endoplasmic reticulum. In the past 40 years, the wide-ranging functions mediated by IP3R and its genetic defects causing a variety of disorders have been unveiled. Recent cryo-electron microscopy and X-ray crystallography have resolved IP3R structures and begun to integrate with concurrent functional studies, which can explicate IP3-dependent opening of Ca2+-conducting gates placed ∼90 Å away from IP3-binding sites and its regulation by Ca2+. This review highlights recent research progress on the IP3R structure and function. We also propose how protein plasticity within IP3R, which involves allosteric gating and assembly transformations accompanied by rapid and chronic structural changes, would enable it to regulate diverse functions at cellular microdomains in pathophysiological states.
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Affiliation(s)
- Kozo Hamada
- Laboratory of Cell Calcium Signaling, Shanghai Institute for Advanced Immunochemical Studies (SIAIS), ShanghaiTech University, Shanghai, 201210, China; ,
| | - Katsuhiko Mikoshiba
- Laboratory of Cell Calcium Signaling, Shanghai Institute for Advanced Immunochemical Studies (SIAIS), ShanghaiTech University, Shanghai, 201210, China; ,
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17
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Sohn PD, Huang CTL, Yan R, Fan L, Tracy TE, Camargo CM, Montgomery KM, Arhar T, Mok SA, Freilich R, Baik J, He M, Gong S, Roberson ED, Karch CM, Gestwicki JE, Xu K, Kosik KS, Gan L. Pathogenic Tau Impairs Axon Initial Segment Plasticity and Excitability Homeostasis. Neuron 2019; 104:458-470.e5. [PMID: 31542321 PMCID: PMC6880876 DOI: 10.1016/j.neuron.2019.08.008] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 06/02/2019] [Accepted: 08/03/2019] [Indexed: 01/08/2023]
Abstract
Dysregulation of neuronal excitability underlies the pathogenesis of tauopathies, including frontotemporal dementia (FTD) with tau inclusions. A majority of FTD-causing tau mutations are located in the microtubule-binding domain, but how these mutations alter neuronal excitability is largely unknown. Here, using CRISPR/Cas9-based gene editing in human pluripotent stem cell (iPSC)-derived neurons and isogenic controls, we show that the FTD-causing V337M tau mutation impairs activity-dependent plasticity of the cytoskeleton in the axon initial segment (AIS). Extracellular recordings by multi-electrode arrays (MEAs) revealed that the V337M tau mutation in human neurons leads to an abnormal increase in neuronal activity in response to chronic depolarization. Stochastic optical reconstruction microscopy of human neurons with this mutation showed that AIS plasticity is impaired by the abnormal accumulation of end-binding protein 3 (EB3) in the AIS submembrane region. These findings expand our understanding of how FTD-causing tau mutations dysregulate components of the neuronal cytoskeleton, leading to network dysfunction.
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Affiliation(s)
- Peter Dongmin Sohn
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA; Department of Neurology, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Cindy Tzu-Ling Huang
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA; Department of Neurology, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Rui Yan
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Li Fan
- Helen and Robert Appel Alzheimer's Disease Research Institute, Weill Cornell Medical Center, New York, NY10021, USA
| | - Tara E Tracy
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA; Department of Neurology, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Carolina M Camargo
- Neuroscience Research Institute and Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106, USA
| | - Kelly M Montgomery
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Taylor Arhar
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Sue-Ann Mok
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada
| | - Rebecca Freilich
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Justin Baik
- Department of Physics, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Manni He
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Shiaoching Gong
- Helen and Robert Appel Alzheimer's Disease Research Institute, Weill Cornell Medical Center, New York, NY10021, USA
| | - Erik D Roberson
- Departments of Neurology and Neurobiology, University of Alabama, Birmingham, Birmingham, AL 35294, USA
| | - Celeste M Karch
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jason E Gestwicki
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Ke Xu
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Kenneth S Kosik
- Neuroscience Research Institute and Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106, USA
| | - Li Gan
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA; Department of Neurology, University of California, San Francisco, San Francisco, CA 94158, USA.
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18
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Kruse K, Klomp J, Sun M, Chen Z, Santana D, Huang F, Kanabar P, Maienschein-Cline M, Komarova YA. Analysis of biological networks in the endothelium with biomimetic microsystem platform. Am J Physiol Lung Cell Mol Physiol 2019; 317:L392-L401. [PMID: 31313617 DOI: 10.1152/ajplung.00392.2018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Here we describe a novel method for studying the protein "interactome" in primary human cells and apply this method to investigate the effect of posttranslational protein modifications (PTMs) on the protein's functions. We created a novel "biomimetic microsystem platform" (Bio-MSP) to isolate the protein complexes in primary cells by covalently attaching purified His-tagged proteins to a solid microscale support. Using this Bio-MSP, we have analyzed the interactomes of unphosphorylated and phosphomimetic end-binding protein-3 (EB3) in endothelial cells. Pathway analysis of these interactomes demonstrated the novel role of EB3 phosphorylation at serine 162 in regulating the protein's function. We showed that phosphorylation "switches" the EB3 biological network to modulate cellular processes such as cell-to-cell adhesion whereas dephosphorylation of this site promotes cell proliferation. This novel technique provides a useful tool to study the role of PTMs or single point mutations in activating distinct signal transduction networks and thereby the biological function of the protein in health and disease.
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Affiliation(s)
- Kevin Kruse
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Jeff Klomp
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Mitchell Sun
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Zhang Chen
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Dianicha Santana
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Fei Huang
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Pinal Kanabar
- Research Informatics Core of the Research Resources Center, University of Illinois at Chicago, Chicago, Illinois.,College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Mark Maienschein-Cline
- Research Informatics Core of the Research Resources Center, University of Illinois at Chicago, Chicago, Illinois.,College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Yulia A Komarova
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
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19
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Blanco C, Morales D, Mogollones I, Vergara‐Jaque A, Vargas C, Álvarez A, Riquelme D, Leiva‐Salcedo E, González W, Morales D, Maureira D, Aldunate I, Cáceres M, Varela D, Cerda O. EB1‐ and EB2‐dependent anterograde trafficking of TRPM4 regulates focal adhesion turnover and cell invasion. FASEB J 2019; 33:9434-9452. [DOI: 10.1096/fj.201900136r] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Constanza Blanco
- Program of Cellular and Molecular Biology Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
| | - Danna Morales
- Program of Physiology and Biophysics Institute of Biomedical Sciences Faculty of Medicine Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
| | - Ignacio Mogollones
- Program of Cellular and Molecular Biology Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
| | - Ariela Vergara‐Jaque
- Program of Physiology and Biophysics Institute of Biomedical Sciences Faculty of Medicine Universidad de Chile Santiago Chile
- Multidisciplinary Scientific Nucleus Universidad de Talca Talca Chile
- Center for Bioinformatics and Molecular Simulation Universidad de Talca Talca Chile
| | - Carla Vargas
- Program of Cellular and Molecular Biology Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
| | - Alhejandra Álvarez
- Program of Cellular and Molecular Biology Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
| | - Denise Riquelme
- Department of Biology Faculty of Chemistry and Biology Universidad de Santiago de Chile Santiago Chile
| | - Elías Leiva‐Salcedo
- Department of Biology Faculty of Chemistry and Biology Universidad de Santiago de Chile Santiago Chile
| | - Wendy González
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
- Center for Bioinformatics and Molecular Simulation Universidad de Talca Talca Chile
| | - Diego Morales
- Program of Cellular and Molecular Biology Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
| | - Diego Maureira
- Program of Cellular and Molecular Biology Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
| | - Ismael Aldunate
- Program of Cellular and Molecular Biology Universidad de Chile Santiago Chile
| | - Mónica Cáceres
- Program of Cellular and Molecular Biology Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
- The Wound Repair Treatment, and Health (WoRTH) Initiative Santiago Chile
| | - Diego Varela
- Program of Physiology and Biophysics Institute of Biomedical Sciences Faculty of Medicine Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
| | - Oscar Cerda
- Program of Cellular and Molecular Biology Universidad de Chile Santiago Chile
- Millennium Nucleus of Ion Channels‐Associated Diseases (MiNICAD) Santiago Chile
- The Wound Repair Treatment, and Health (WoRTH) Initiative Santiago Chile
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20
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Prole DL, Taylor CW. Structure and Function of IP 3 Receptors. Cold Spring Harb Perspect Biol 2019; 11:cshperspect.a035063. [PMID: 30745293 DOI: 10.1101/cshperspect.a035063] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Inositol 1,4,5-trisphosphate receptors (IP3Rs), by releasing Ca2+ from the endoplasmic reticulum (ER) of animal cells, allow Ca2+ to be redistributed from the ER to the cytosol or other organelles, and they initiate store-operated Ca2+ entry (SOCE). For all three IP3R subtypes, binding of IP3 primes them to bind Ca2+, which then triggers channel opening. We are now close to understanding the structural basis of IP3R activation. Ca2+-induced Ca2+ release regulated by IP3 allows IP3Rs to regeneratively propagate Ca2+ signals. The smallest of these regenerative events is a Ca2+ puff, which arises from the nearly simultaneous opening of a small cluster of IP3Rs. Ca2+ puffs are the basic building blocks for all IP3-evoked Ca2+ signals, but only some IP3 clusters, namely those parked alongside the ER-plasma membrane junctions where SOCE occurs, are licensed to respond. The location of these licensed IP3Rs may allow them to selectively regulate SOCE.
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Affiliation(s)
- David L Prole
- Department of Pharmacology, University of Cambridge, Cambridge CB2 1PD, United Kingdom
| | - Colin W Taylor
- Department of Pharmacology, University of Cambridge, Cambridge CB2 1PD, United Kingdom
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21
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Thillaiappan NB, Chakraborty P, Hasan G, Taylor CW. IP 3 receptors and Ca 2+ entry. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2018; 1866:1092-1100. [PMID: 30448464 DOI: 10.1016/j.bbamcr.2018.11.007] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 11/07/2018] [Accepted: 11/08/2018] [Indexed: 12/23/2022]
Abstract
Inositol 1,4,5-trisphosphate receptors (IP3R) are the most widely expressed intracellular Ca2+ release channels. Their activation by IP3 and Ca2+ allows Ca2+ to pass rapidly from the ER lumen to the cytosol. The resulting increase in cytosolic [Ca2+] may directly regulate cytosolic effectors or fuel Ca2+ uptake by other organelles, while the decrease in ER luminal [Ca2+] stimulates store-operated Ca2+ entry (SOCE). We are close to understanding the structural basis of both IP3R activation, and the interactions between the ER Ca2+-sensor, STIM, and the plasma membrane Ca2+ channel, Orai, that lead to SOCE. IP3Rs are the usual means through which extracellular stimuli, through ER Ca2+ release, stimulate SOCE. Here, we review evidence that the IP3Rs most likely to respond to IP3 are optimally placed to allow regulation of SOCE. We also consider evidence that IP3Rs may regulate SOCE downstream of their ability to deplete ER Ca2+ stores. Finally, we review evidence that IP3Rs in the plasma membrane can also directly mediate Ca2+ entry in some cells.
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Affiliation(s)
| | - Pragnya Chakraborty
- Department of Pharmacology, Tennis Court Road, Cambridge CB2 1PD, United Kingdom; National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bellary Road, Bangalore 560065, India
| | - Gaiti Hasan
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bellary Road, Bangalore 560065, India
| | - Colin W Taylor
- Department of Pharmacology, Tennis Court Road, Cambridge CB2 1PD, United Kingdom.
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22
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Wang JB, Gu Y, Zhang MX, Yang S, Wang Y, Wang W, Li XR, Zhao YT, Wang HT. High expression of type I inositol 1,4,5-trisphosphate receptor in the kidney of rats with hepatorenal syndrome. World J Gastroenterol 2018; 24:3273-3280. [PMID: 30090007 PMCID: PMC6079285 DOI: 10.3748/wjg.v24.i29.3273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 06/19/2018] [Accepted: 06/27/2018] [Indexed: 02/06/2023] Open
Abstract
AIM To detect the expression of type I inositol 1,4,5-trisphosphate receptor (IP3RI) in the kidney of rats with hepatorenal syndrome (HRS). METHODS One hundred and twenty-five Sprague-Dawley rats were randomly divided into four groups to receive an intravenous injection of D-galactosamine (D-GalN) plus lipopolysaccharide (LPS; group G/L, n = 50), D-GalN alone (group G, n = 25), LPS alone (group L, n = 25), and normal saline (group NS, n = 25), respectively. At 3, 6, 9, 12, and 24 h after injection, blood, liver, and kidney samples were collected. Hematoxylin-eosin staining of liver tissue was performed to assess hepatocyte necrosis. Electron microscopy was used to observe ultrastructural changes in the kidney. Western blot analysis and real-time PCR were performed to detect the expression of IP3RI protein and mRNA in the kidney, respectively. RESULTS Hepatocyte necrosis was aggravated gradually, which was most significant at 12 h after treatment with D-galactosamine/lipopolysaccharide, and was characterized by massive hepatocyte necrosis. At the same time, serum levels of biochemical indicators including liver and kidney function indexes were all significantly changed. The structure of the renal glomerulus and tubules was normal at all time points. Western blot analysis indicated that IP3RI protein expression began to rise at 3 h (P < 0.05) and peaked at 12 h (P < 0.01). Real-time PCR demonstrated that IP3RI mRNA expression began to rise at 3 h (P < 0.05) and peaked at 9 h (P < 0.01). CONCLUSION IP3RI protein expression is increased in the kidney of HRS rats, and may be regulated at the transcriptional level.
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MESH Headings
- Animals
- Disease Models, Animal
- Galactosamine/toxicity
- Hepatocytes/pathology
- Hepatorenal Syndrome/chemically induced
- Hepatorenal Syndrome/pathology
- Humans
- Inositol 1,4,5-Trisphosphate Receptors/genetics
- Inositol 1,4,5-Trisphosphate Receptors/metabolism
- Kidney/blood supply
- Kidney/cytology
- Kidney/pathology
- Kidney/ultrastructure
- Lipopolysaccharides/toxicity
- Liver/cytology
- Liver/drug effects
- Liver/pathology
- Male
- Microscopy, Electron
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/pathology
- Myocytes, Smooth Muscle/pathology
- Myocytes, Smooth Muscle/ultrastructure
- Necrosis
- RNA, Messenger/metabolism
- Rats
- Rats, Sprague-Dawley
- Specific Pathogen-Free Organisms
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Affiliation(s)
- Jing-Bo Wang
- Liver Cirrhosis Ward, the Sixth People’s Hospital of Shenyang, Shenyang 110006, Liaoning Province, China
| | - Ye Gu
- Liver Cirrhosis Ward, the Sixth People’s Hospital of Shenyang, Shenyang 110006, Liaoning Province, China
| | - Ming-Xiang Zhang
- Liver Cirrhosis Ward, the Sixth People’s Hospital of Shenyang, Shenyang 110006, Liaoning Province, China
| | - Shun Yang
- Liaoning Cancer Hospital & Institute, Shenyang 110042, Liaoning Province, China
| | - Yan Wang
- Liver Cirrhosis Ward, the Sixth People’s Hospital of Shenyang, Shenyang 110006, Liaoning Province, China
| | - Wei Wang
- Liver Cirrhosis Ward, the Sixth People’s Hospital of Shenyang, Shenyang 110006, Liaoning Province, China
| | - Xi-Ran Li
- Liver Cirrhosis Ward, the Sixth People’s Hospital of Shenyang, Shenyang 110006, Liaoning Province, China
| | - Yi-Tong Zhao
- Liver Cirrhosis Ward, the Sixth People’s Hospital of Shenyang, Shenyang 110006, Liaoning Province, China
| | - Hai-Tao Wang
- Department of General Surgery, the Second Affiliated Hospital of Shenyang Medical College, Shenyang 110002, Liaoning Province, China
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23
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Procter DJ, Banerjee A, Nukui M, Kruse K, Gaponenko V, Murphy EA, Komarova Y, Walsh D. The HCMV Assembly Compartment Is a Dynamic Golgi-Derived MTOC that Controls Nuclear Rotation and Virus Spread. Dev Cell 2018; 45:83-100.e7. [PMID: 29634939 DOI: 10.1016/j.devcel.2018.03.010] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 02/08/2018] [Accepted: 03/14/2018] [Indexed: 10/17/2022]
Abstract
Human cytomegalovirus (HCMV), a leading cause of congenital birth defects, forms an unusual cytoplasmic virion maturation site termed the "assembly compartment" (AC). Here, we show that the AC also acts as a microtubule-organizing center (MTOC) wherein centrosome activity is suppressed and Golgi-based microtubule (MT) nucleation is enhanced. This involved viral manipulation of discrete functions of MT plus-end-binding (EB) proteins. In particular, EB3, but not EB1 or EB2, was recruited to the AC and was required to nucleate MTs that were rapidly acetylated. EB3-regulated acetylated MTs were necessary for nuclear rotation prior to cell migration, maintenance of AC structure, and optimal virus replication. Independently, a myristoylated peptide that blocked EB3-mediated enrichment of MT regulatory proteins at Golgi regions of the AC also suppressed acetylated MT formation, nuclear rotation, and infection. Thus, HCMV offers new insights into the regulation and functions of Golgi-derived MTs and the therapeutic potential of targeting EB3.
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Affiliation(s)
- Dean J Procter
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Avik Banerjee
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Masatoshi Nukui
- Department of Translational Medicine, Baruch S. Blumberg Research Institute, Doylestown, PA 18902, USA; Forge Life Science, Pennsylvania Biotechnology Center, Doylestown, PA 18902, USA
| | - Kevin Kruse
- Department of Pharmacology and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Vadim Gaponenko
- Department of Biochemistry and Molecular Genetics, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Eain A Murphy
- Department of Translational Medicine, Baruch S. Blumberg Research Institute, Doylestown, PA 18902, USA; Forge Life Science, Pennsylvania Biotechnology Center, Doylestown, PA 18902, USA
| | - Yulia Komarova
- Department of Pharmacology and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Derek Walsh
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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24
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Parthasarathi K. The Pulmonary Vascular Barrier: Insights into Structure, Function, and Regulatory Mechanisms. MOLECULAR AND FUNCTIONAL INSIGHTS INTO THE PULMONARY VASCULATURE 2018; 228:41-61. [DOI: 10.1007/978-3-319-68483-3_3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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25
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CK2β regulates thrombopoiesis and Ca2+-triggered platelet activation in arterial thrombosis. Blood 2017; 130:2774-2785. [DOI: 10.1182/blood-2017-05-784413] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 09/12/2017] [Indexed: 02/06/2023] Open
Abstract
Key Points
CK2β is critically required for thrombopoiesis by regulating tubulin polymerization, MK fragmentation, and proplatelet formation. CK2β facilitates inositol triphosphate–mediated increase of cytosolic Ca2+ and is essential for platelet activation in arterial thrombosis in vivo.
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26
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Ca 2+ signals initiate at immobile IP 3 receptors adjacent to ER-plasma membrane junctions. Nat Commun 2017; 8:1505. [PMID: 29138405 PMCID: PMC5686115 DOI: 10.1038/s41467-017-01644-8] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 10/06/2017] [Indexed: 11/08/2022] Open
Abstract
IP3 receptors (IP3Rs) release Ca2+ from the ER when they bind IP3 and Ca2+. The spatial organization of IP3Rs determines both the propagation of Ca2+ signals between IP3Rs and the selective regulation of cellular responses. Here we use gene editing to fluorescently tag endogenous IP3Rs, and super-resolution microscopy to determine the geography of IP3Rs and Ca2+ signals within living cells. We show that native IP3Rs cluster within ER membranes. Most IP3R clusters are mobile, moved by diffusion and microtubule motors. Ca2+ signals are generated by a small population of immobile IP3Rs. These IP3Rs are licensed to respond, but they do not readily mix with mobile IP3Rs. The licensed IP3Rs reside alongside ER-plasma membrane junctions where STIM1, which regulates store-operated Ca2+ entry, accumulates after depletion of Ca2+ stores. IP3Rs tethered close to ER-plasma membrane junctions are licensed to respond and optimally placed to be activated by endogenous IP3 and to regulate Ca2+ entry. IP3 receptors mediate Ca2+ release from the endoplasmic reticulum. Here the authors show that only a small fraction of IP3 receptors initiate Ca2+ signals; these immobile IP3 receptors adjacent to the plasma membrane are optimally placed to control STIM1-dependent Ca2+ entry.
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27
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Klei LR, Hu D, Panek R, Alfano DN, Bridwell RE, Bailey KM, Oravecz-Wilson KI, Concel VJ, Hess EM, Van Beek M, Delekta PC, Gu S, Watkins SC, Ting AT, Gough PJ, Foley KP, Bertin J, McAllister-Lucas LM, Lucas PC. MALT1 Protease Activation Triggers Acute Disruption of Endothelial Barrier Integrity via CYLD Cleavage. Cell Rep 2017; 17:221-232. [PMID: 27681433 DOI: 10.1016/j.celrep.2016.08.080] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 07/14/2016] [Accepted: 08/23/2016] [Indexed: 12/26/2022] Open
Abstract
Microvascular endothelial cells maintain a tight barrier to prevent passage of plasma and circulating immune cells into the extravascular tissue compartment, yet endothelial cells respond rapidly to vasoactive substances, including thrombin, allowing transient paracellular permeability. This response is a cornerstone of acute inflammation, but the mechanisms responsible are still incompletely understood. Here, we demonstrate that thrombin triggers MALT1 to proteolytically cleave cylindromatosis (CYLD). Fragmentation of CYLD results in microtubule disruption and a cascade of events leading to endothelial cell retraction and an acute permeability response. This finding reveals an unexpected role for the MALT1 protease, which previously has been viewed mostly as a driver of pro-inflammatory NF-κB signaling in lymphocytes. Thus, MALT1 not only promotes immune cell activation but also acutely regulates endothelial cell biology, actions that together facilitate tissue inflammation. Pharmacologic inhibition of MALT1 may therefore have synergistic impact by targeting multiple disparate steps in the overall inflammatory response.
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Affiliation(s)
- Linda R Klei
- Departments of Pathology and Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Dong Hu
- Departments of Pathology and Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Robert Panek
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Danielle N Alfano
- Departments of Pathology and Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Rachel E Bridwell
- Departments of Pathology and Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Kelly M Bailey
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | | | - Vincent J Concel
- Departments of Pathology and Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Emily M Hess
- Departments of Pathology and Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Matthew Van Beek
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Phillip C Delekta
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Shufang Gu
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Simon C Watkins
- Center for Biologic Imaging, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Adrian T Ting
- Immunology Institute, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Peter J Gough
- Pattern Recognition Receptor Discovery Performance Unit, Immuno-Inflammation Therapeutic Area, GlaxoSmithKline, Collegeville, PA 19406, USA
| | - Kevin P Foley
- Pattern Recognition Receptor Discovery Performance Unit, Immuno-Inflammation Therapeutic Area, GlaxoSmithKline, Collegeville, PA 19406, USA
| | - John Bertin
- Pattern Recognition Receptor Discovery Performance Unit, Immuno-Inflammation Therapeutic Area, GlaxoSmithKline, Collegeville, PA 19406, USA
| | - Linda M McAllister-Lucas
- Departments of Pathology and Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA; Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA.
| | - Peter C Lucas
- Departments of Pathology and Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA; Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA.
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28
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Keebler MV, Taylor CW. Endogenous signalling pathways and caged IP 3 evoke Ca 2+ puffs at the same abundant immobile intracellular sites. J Cell Sci 2017; 130:3728-3739. [PMID: 28893841 PMCID: PMC5702060 DOI: 10.1242/jcs.208520] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/04/2017] [Indexed: 12/18/2022] Open
Abstract
The building blocks of intracellular Ca2+ signals evoked by inositol 1,4,5-trisphosphate receptors (IP3Rs) are Ca2+ puffs, transient focal increases in Ca2+ concentration that reflect the opening of small clusters of IP3Rs. We use total internal reflection fluorescence microscopy and automated analyses to detect Ca2+ puffs evoked by photolysis of caged IP3 or activation of endogenous muscarinic receptors with carbachol in human embryonic kidney 293 cells. Ca2+ puffs evoked by carbachol initiated at an estimated 65±7 sites/cell, and the sites remained immobile for many minutes. Photolysis of caged IP3 evoked Ca2+ puffs at a similar number of sites (100±35). Increasing the carbachol concentration increased the frequency of Ca2+ puffs without unmasking additional Ca2+ release sites. By measuring responses to sequential stimulation with carbachol or photolysed caged IP3, we established that the two stimuli evoked Ca2+ puffs at the same sites. We conclude that IP3-evoked Ca2+ puffs initiate at numerous immobile sites and the sites become more likely to fire as the IP3 concentration increases; there is no evidence that endogenous signalling pathways selectively deliver IP3 to specific sites. Summary: Ca2+ puffs are the building blocks for IP3-evoked Ca2+ signals. Ca2+ puffs evoked by caged IP3 or via endogenous signalling pathways initiate at the same fixed intracellular sites.
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Affiliation(s)
- Michael V Keebler
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB2 1PD, UK
| | - Colin W Taylor
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB2 1PD, UK
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29
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IP 3 receptor signaling and endothelial barrier function. Cell Mol Life Sci 2017; 74:4189-4207. [PMID: 28803370 DOI: 10.1007/s00018-017-2624-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 07/18/2017] [Accepted: 08/08/2017] [Indexed: 12/14/2022]
Abstract
The endothelium, a monolayer of endothelial cells lining vessel walls, maintains tissue-fluid homeostasis by restricting the passage of the plasma proteins and blood cells into the interstitium. The ion Ca2+, a ubiquitous secondary messenger, initiates signal transduction events in endothelial cells that is critical to control of vascular tone and endothelial permeability. The ion Ca2+ is stored inside the intracellular organelles and released into the cytosol in response to environmental cues. The inositol 1,4,5-trisphosphate (IP3) messenger facilitates Ca2+ release through IP3 receptors which are Ca2+-selective intracellular channels located within the membrane of the endoplasmic reticulum. Binding of IP3 to the IP3Rs initiates assembly of IP3R clusters, a key event responsible for amplification of Ca2+ signals in endothelial cells. This review discusses emerging concepts related to architecture and dynamics of IP3R clusters, and their specific role in propagation of Ca2+ signals in endothelial cells.
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30
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Komarova YA, Kruse K, Mehta D, Malik AB. Protein Interactions at Endothelial Junctions and Signaling Mechanisms Regulating Endothelial Permeability. Circ Res 2017; 120:179-206. [PMID: 28057793 DOI: 10.1161/circresaha.116.306534] [Citation(s) in RCA: 293] [Impact Index Per Article: 41.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 10/04/2016] [Accepted: 10/06/2016] [Indexed: 12/31/2022]
Abstract
The monolayer of endothelial cells lining the vessel wall forms a semipermeable barrier (in all tissue except the relatively impermeable blood-brain and inner retinal barriers) that regulates tissue-fluid homeostasis, transport of nutrients, and migration of blood cells across the barrier. Permeability of the endothelial barrier is primarily regulated by a protein complex called adherens junctions. Adherens junctions are not static structures; they are continuously remodeled in response to mechanical and chemical cues in both physiological and pathological settings. Here, we discuss recent insights into the post-translational modifications of junctional proteins and signaling pathways regulating plasticity of adherens junctions and endothelial permeability. We also discuss in the context of what is already known and newly defined signaling pathways that mediate endothelial barrier leakiness (hyperpermeability) that are important in the pathogenesis of cardiovascular and lung diseases and vascular inflammation.
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Affiliation(s)
- Yulia A Komarova
- From the Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago
| | - Kevin Kruse
- From the Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago
| | - Dolly Mehta
- From the Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago
| | - Asrar B Malik
- From the Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago.
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31
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Determining the Roles of Inositol Trisphosphate Receptors in Neurodegeneration: Interdisciplinary Perspectives on a Complex Topic. Mol Neurobiol 2016; 54:6870-6884. [PMID: 27771899 DOI: 10.1007/s12035-016-0205-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 10/11/2016] [Indexed: 02/06/2023]
Abstract
It is well known that calcium (Ca2+) is involved in the triggering of neuronal death. Ca2+ cytosolic levels are regulated by Ca2+ release from internal stores located in organelles, such as the endoplasmic reticulum. Indeed, Ca2+ transit from distinct cell compartments follows complex dynamics that are mediated by specific receptors, notably inositol trisphosphate receptors (IP3Rs). Ca2+ release by IP3Rs plays essential roles in several neurological disorders; however, details of these processes are poorly understood. Moreover, recent studies have shown that subcellular location, molecular identity, and density of IP3Rs profoundly affect Ca2+ transit in neurons. Therefore, regulation of IP3R gene products in specific cellular vicinities seems to be crucial in a wide range of cellular processes from neuroprotection to neurodegeneration. In this regard, microRNAs seem to govern not only IP3Rs translation levels but also subcellular accumulation. Combining new data from molecular cell biology with mathematical modelling, we were able to summarize the state of the art on this topic. In addition to presenting how Ca2+ dynamics mediated by IP3R activation follow a stochastic regimen, we integrated a theoretical approach in an easy-to-apply, cell biology-coherent fashion. Following the presented premises and in contrast to previously tested hypotheses, Ca2+ released by IP3Rs may play different roles in specific neurological diseases, including Alzheimer's disease and Parkinson's disease.
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32
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The role of the drebrin/EB3/Cdk5 pathway in dendritic spine plasticity, implications for Alzheimer's disease. Brain Res Bull 2016; 126:293-299. [PMID: 27365229 DOI: 10.1016/j.brainresbull.2016.06.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 06/23/2016] [Accepted: 06/25/2016] [Indexed: 11/21/2022]
Abstract
The drebrin/EB3/Cdk5 intracellular signalling pathway couples actin filaments to dynamic microtubules in cellular settings where cells are changing shape. The pathway has been most intensively studied in neuronal development, particularly neuritogenesis and neuronal migration, and in synaptic plasticity at dendritic spines in mature neurons. Drebrin is an actin filament side-binding and bundling protein that stabilises actin filaments. The end-binding (EB) proteins are microtubule plus-end tracking proteins (+TIPs) that localise to the growing plus-ends of dynamic microtubules and regulate their behavior and the binding of other +TIP proteins. EB3 binds specifically to drebrin when drebrin is bound to actin filaments, for example at the base of a growth cone filopodium, and EB3 is located at the plus-end of a growing microtubule inserting into the filopodium. This interaction therefore forms the basis for coupling dynamic microtubules to actin filaments in growth cones of developing neurons. Appropriate responses to growth cone guidance cues depend on actin filament/microtubule co-ordination in the growth cone, although the role of the drebrin/EB3/Cdk5 pathway in this context has not been directly tested. A similar cytoskeleton coupling pathway operates in dendritic spines in mature neurons where the activity-dependent insertion of dynamic microtubules into dendritic spines is facilitated by drebrin binding to EB3. Microtubule insertion into dendritic spines drives spine maturation during long-term potentiation and therefore has a role in synaptic plasticity and memory formation. In Alzheimer's disease and related chronic neurodegenerative diseases, there is an early and dramatic loss of drebrin from dendritic spines that precedes synapse loss and neurodegeneration and might contribute to a failure of synaptic plasticity and hence to cognitive decline.
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33
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Prole DL, Taylor CW. Inositol 1,4,5-trisphosphate receptors and their protein partners as signalling hubs. J Physiol 2016; 594:2849-66. [PMID: 26830355 PMCID: PMC4887697 DOI: 10.1113/jp271139] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 11/06/2015] [Indexed: 01/26/2023] Open
Abstract
Inositol 1,4,5‐trisphosphate receptors (IP3Rs) are expressed in nearly all animal cells, where they mediate the release of Ca2+ from intracellular stores. The complex spatial and temporal organization of the ensuing intracellular Ca2+ signals allows selective regulation of diverse physiological responses. Interactions of IP3Rs with other proteins contribute to the specificity and speed of Ca2+ signalling pathways, and to their capacity to integrate information from other signalling pathways. In this review, we provide a comprehensive survey of the proteins proposed to interact with IP3Rs and the functional effects that these interactions produce. Interacting proteins can determine the activity of IP3Rs, facilitate their regulation by multiple signalling pathways and direct the Ca2+ that they release to specific targets. We suggest that IP3Rs function as signalling hubs through which diverse inputs are processed and then emerge as cytosolic Ca2+ signals.
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Affiliation(s)
- David L Prole
- Department of Pharmacology, University of Cambridge, Cambridge, CB2 1PD, UK
| | - Colin W Taylor
- Department of Pharmacology, University of Cambridge, Cambridge, CB2 1PD, UK
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