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Eshaq AM, Flanagan TW, Hassan SY, Al Asheikh SA, Al-Amoudi WA, Santourlidis S, Hassan SL, Alamodi MO, Bendhack ML, Alamodi MO, Haikel Y, Megahed M, Hassan M. Non-Receptor Tyrosine Kinases: Their Structure and Mechanistic Role in Tumor Progression and Resistance. Cancers (Basel) 2024; 16:2754. [PMID: 39123481 PMCID: PMC11311543 DOI: 10.3390/cancers16152754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/30/2024] [Accepted: 07/29/2024] [Indexed: 08/12/2024] Open
Abstract
Protein tyrosine kinases (PTKs) function as key molecules in the signaling pathways in addition to their impact as a therapeutic target for the treatment of many human diseases, including cancer. PTKs are characterized by their ability to phosphorylate serine, threonine, or tyrosine residues and can thereby rapidly and reversibly alter the function of their protein substrates in the form of significant changes in protein confirmation and affinity for their interaction with protein partners to drive cellular functions under normal and pathological conditions. PTKs are classified into two groups: one of which represents tyrosine kinases, while the other one includes the members of the serine/threonine kinases. The group of tyrosine kinases is subdivided into subgroups: one of them includes the member of receptor tyrosine kinases (RTKs), while the other subgroup includes the member of non-receptor tyrosine kinases (NRTKs). Both these kinase groups function as an "on" or "off" switch in many cellular functions. NRTKs are enzymes which are overexpressed and activated in many cancer types and regulate variable cellular functions in response to extracellular signaling-dependent mechanisms. NRTK-mediated different cellular functions are regulated by kinase-dependent and kinase-independent mechanisms either in the cytoplasm or in the nucleus. Thus, targeting NRTKs is of great interest to improve the treatment strategy of different tumor types. This review deals with the structure and mechanistic role of NRTKs in tumor progression and resistance and their importance as therapeutic targets in tumor therapy.
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Affiliation(s)
- Abdulaziz M. Eshaq
- Department of Epidemiology and Biostatistics, Milken Institute School of Public Health, George Washington University, Washington, DC 20052, USA;
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (S.A.A.A.); (W.A.A.-A.); (M.O.A.); (M.O.A.)
| | - Thomas W. Flanagan
- Department of Pharmacology and Experimental Therapeutics, LSU Health Sciences Center, New Orleans, LA 70112, USA;
| | - Sofie-Yasmin Hassan
- Department of Pharmacy, Faculty of Science, Heinrich-Heine University Duesseldorf, 40225 Duesseldorf, Germany;
| | - Sara A. Al Asheikh
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (S.A.A.A.); (W.A.A.-A.); (M.O.A.); (M.O.A.)
| | - Waleed A. Al-Amoudi
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (S.A.A.A.); (W.A.A.-A.); (M.O.A.); (M.O.A.)
| | - Simeon Santourlidis
- Institute of Cell Therapeutics and Diagnostics, University Medical Center of Duesseldorf, 40225 Duesseldorf, Germany;
| | - Sarah-Lilly Hassan
- Department of Chemistry, Faculty of Science, Heinrich-Heine University Duesseldorf, 40225 Duesseldorf, Germany;
| | - Maryam O. Alamodi
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (S.A.A.A.); (W.A.A.-A.); (M.O.A.); (M.O.A.)
| | - Marcelo L. Bendhack
- Department of Urology, Red Cross University Hospital, Positivo University, Rua Mauá 1111, Curitiba 80030-200, Brazil;
| | - Mohammed O. Alamodi
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (S.A.A.A.); (W.A.A.-A.); (M.O.A.); (M.O.A.)
| | - Youssef Haikel
- Institut National de la Santé et de la Recherche Médicale, University of Strasbourg, 67000 Strasbourg, France;
- Department of Operative Dentistry and Endodontics, Dental Faculty, 67000 Strasbourg, France
- Pôle de Médecine et Chirurgie Bucco-Dentaire, Hôpital Civil, Hôpitaux Universitaire de Strasbourg, 67000 Strasbourg, France
| | - Mossad Megahed
- Clinic of Dermatology, University Hospital of Aachen, 52074 Aachen, Germany;
| | - Mohamed Hassan
- Institut National de la Santé et de la Recherche Médicale, University of Strasbourg, 67000 Strasbourg, France;
- Department of Operative Dentistry and Endodontics, Dental Faculty, 67000 Strasbourg, France
- Research Laboratory of Surgery-Oncology, Department of Surgery, Tulane University School of Medicine, New Orleans, LA 70112, USA
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2
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Veloso A, Bleuart A, Conrard L, Orban T, Bruyr J, Cabochette P, Germano RFV, Schevenels G, Bernard A, Zindy E, Demeyer S, Vanhollebeke B, Dequiedt F, Martin M. The cytoskeleton adaptor protein Sorbs1 controls the development of lymphatic and venous vessels in zebrafish. BMC Biol 2024; 22:51. [PMID: 38414014 PMCID: PMC10900589 DOI: 10.1186/s12915-024-01850-z] [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: 08/07/2023] [Accepted: 02/20/2024] [Indexed: 02/29/2024] Open
Abstract
BACKGROUND Lymphangiogenesis, the formation of lymphatic vessels, is tightly linked to the development of the venous vasculature, both at the cellular and molecular levels. Here, we identify a novel role for Sorbs1, the founding member of the SoHo family of cytoskeleton adaptor proteins, in vascular and lymphatic development in the zebrafish. RESULTS We show that Sorbs1 is required for secondary sprouting and emergence of several vascular structures specifically derived from the axial vein. Most notably, formation of the precursor parachordal lymphatic structures is affected in sorbs1 mutant embryos, severely impacting the establishment of the trunk lymphatic vessel network. Interestingly, we show that Sorbs1 interacts with the BMP pathway and could function outside of Vegfc signaling. Mechanistically, Sorbs1 controls FAK/Src signaling and subsequently impacts on the cytoskeleton processes regulated by Rac1 and RhoA GTPases. Inactivation of Sorbs1 altered cell-extracellular matrix (ECM) contacts rearrangement and cytoskeleton dynamics, leading to specific defects in endothelial cell migratory and adhesive properties. CONCLUSIONS Overall, using in vitro and in vivo assays, we identify Sorbs1 as an important regulator of venous and lymphatic angiogenesis independently of the Vegfc signaling axis. These results provide a better understanding of the complexity found within context-specific vascular and lymphatic development.
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Affiliation(s)
- Alexandra Veloso
- Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège (ULiège), Liège, Belgium
- Laboratory of Gene Expression and Cancer, GIGA-Molecular Biology of Diseases, University of Liège (ULiège), Liège, Belgium
- Laboratory for the Molecular Biology of Leukemia, Center for Human Genetics, KU Leuven, Leuven, Belgium
| | - Anouk Bleuart
- Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège (ULiège), Liège, Belgium
- Laboratory of Gene Expression and Cancer, GIGA-Molecular Biology of Diseases, University of Liège (ULiège), Liège, Belgium
| | - Louise Conrard
- Center for Microscopy and Molecular Imaging, Université Libre de Bruxelles (ULB), B-6041, Gosselies, Belgium
| | - Tanguy Orban
- Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège (ULiège), Liège, Belgium
- Laboratory of Gene Expression and Cancer, GIGA-Molecular Biology of Diseases, University of Liège (ULiège), Liège, Belgium
| | - Jonathan Bruyr
- Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège (ULiège), Liège, Belgium
- Laboratory of Gene Expression and Cancer, GIGA-Molecular Biology of Diseases, University of Liège (ULiège), Liège, Belgium
| | - Pauline Cabochette
- Department of Molecular Biology, Laboratory of Neurovascular Signaling, ULB Neuroscience Institute, Université Libre de Bruxelles (ULB), B-6041, Gosselies, Belgium
- Present Address: Laboratory of Developmental Genetics, ULB Neuroscience Institute, Université Libre de Bruxelles, B-6041, Gosselies, Belgium
| | - Raoul F V Germano
- Department of Molecular Biology, Laboratory of Neurovascular Signaling, ULB Neuroscience Institute, Université Libre de Bruxelles (ULB), B-6041, Gosselies, Belgium
| | - Giel Schevenels
- Department of Molecular Biology, Laboratory of Neurovascular Signaling, ULB Neuroscience Institute, Université Libre de Bruxelles (ULB), B-6041, Gosselies, Belgium
| | - Alice Bernard
- Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège (ULiège), Liège, Belgium
- Laboratory for Molecular Biology and Genetic Engineering, GIGA-R, University of Liège (ULiège), Liège, Belgium
| | - Egor Zindy
- Center for Microscopy and Molecular Imaging, Université Libre de Bruxelles (ULB), B-6041, Gosselies, Belgium
| | - Sofie Demeyer
- Laboratory for the Molecular Biology of Leukemia, Center for Human Genetics, KU Leuven, Leuven, Belgium
| | - Benoit Vanhollebeke
- Department of Molecular Biology, Laboratory of Neurovascular Signaling, ULB Neuroscience Institute, Université Libre de Bruxelles (ULB), B-6041, Gosselies, Belgium
| | - Franck Dequiedt
- Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège (ULiège), Liège, Belgium
- Laboratory of Gene Expression and Cancer, GIGA-Molecular Biology of Diseases, University of Liège (ULiège), Liège, Belgium
| | - Maud Martin
- Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège (ULiège), Liège, Belgium.
- Laboratory of Gene Expression and Cancer, GIGA-Molecular Biology of Diseases, University of Liège (ULiège), Liège, Belgium.
- Center for Microscopy and Molecular Imaging, Université Libre de Bruxelles (ULB), B-6041, Gosselies, Belgium.
- Department of Molecular Biology, Laboratory of Neurovascular Signaling, ULB Neuroscience Institute, Université Libre de Bruxelles (ULB), B-6041, Gosselies, Belgium.
- WEL Research Institute (WELBIO Department), Avenue Pasteur, 6, 1300, Wavre, Belgium.
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3
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Jia Y, Pan H, Liu J, Huang T, Han K, Mei Q, Zeng L, Zhou J, Zhang Y. MiR-484 promotes nonalcoholic fatty liver disease progression in mice via downregulation of Sorbs2. Obesity (Silver Spring) 2023; 31:2972-2985. [PMID: 37752619 DOI: 10.1002/oby.23884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 09/28/2023]
Abstract
OBJECTIVE MicroRNA 484 (miR-484) plays a pivotal role in the development and progression of different diseases and is typically described as a mitochondrial regulator. Whether miR-484 is involved in lipid metabolism or exerts a role in nonalcoholic fatty liver disease remains unclear. METHODS miR-484 levels were examined in the livers of male mice fed a high-fat diet and in hepatocytes treated with free fatty acids. Sorbin and SH3 structural domain-containing protein 2 (Sorbs2) were identified as a novel target of miR-484 by sequencing mRNA in the livers of miR-484 knockout mice. Sorbs2 liver-specific knockdown mice were constructed by tail vein injection of adeno-associated virus vector to miR-484 knockout mice. In addition, genetic manipulation of SORBS2 was performed in human hepatocyte lines, mouse primary hepatocytes, and the liver. RESULTS Serum and hepatic miR-484 levels are upregulated in nonalcoholic fatty liver disease mice. miR-484 knockdown ameliorated hepatocyte steatosis, whereas miR-484 overexpression increased hepatocyte lipid load. miR-484 knockdown-mediated alleviation of hepatic steatosis, liver injury, inflammation, and apoptosis was compromised after high-fat diet-induced knockdown of Sorbs2 in mouse liver and free fatty acid-induced primary mouse hepatocytes. CONCLUSIONS These results identify Sorbs2-mediated mitochondrial β-oxidation and apoptosis that promote miR-484 knockdown-mediated remission of hepatic steatosis.
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Affiliation(s)
- Yinzhao Jia
- Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hao Pan
- Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Liu
- Key Laboratory of Coal Science and Technology of Ministry of Education, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, China
| | - Tiezeng Huang
- Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ke Han
- Heping Hospital Affiliated to Changzhi Medical College, Changzhi, China
| | - Qiaojuan Mei
- Institute of Reproductive Health and Center for Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ling Zeng
- Institute of Reproductive Health and Center for Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinzhao Zhou
- Institute of Reproductive Health and Center for Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yong Zhang
- Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, China
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Maddala R, Eldawy C, Bachman W, Soderblom EJ, Rao PV. Glypican-4 regulated actin cytoskeletal reorganization in glucocorticoid treated trabecular meshwork cells and involvement of Wnt/PCP signaling. J Cell Physiol 2023; 238:631-646. [PMID: 36727620 DOI: 10.1002/jcp.30953] [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: 11/04/2022] [Revised: 12/30/2022] [Accepted: 01/10/2023] [Indexed: 02/03/2023]
Abstract
A common adverse response to the clinical use of glucocorticoids (GCs) is elevated intraocular pressure (IOP) which is a major risk factor for glaucoma. Elevated IOP arises due to impaired outflow of aqueous humor (AH) through the trabecular meshwork (TM). Although GC-induced changes in actin cytoskeletal dynamics, contractile characteristics, and cell adhesive interactions of TM cells are believed to influence AH outflow and IOP, the molecular mechanisms mediating changes in these cellular characteristics are poorly understood. Our studies focused on evaluating changes in the cytoskeletal and cytoskeletal-associated protein (cytoskeletome) profile of human TM cells treated with dexamethasone (Dex) using label-free mass spectrometric quantification, identified elevated levels of specific proteins known to regulate actin stress fiber formation, contraction, actin networks crosslinking, cell adhesion, and Wnt signaling, including LIMCH1, ArgBP2, CNN3, ITGBL1, CTGF, palladin, FAT1, DIAPH2, EPHA4, SIPA1L1, and GPC4. Several of these proteins colocalized with the actin cytoskeleton and underwent alterations in distribution profile in TM cells treated with Dex, and an inhibitor of Abl/Src kinases. Wnt/Planar Cell Polarity (PCP) signaling agonists-Wnt5a and 5b were detected prominently in the cytoskeletome fraction of TM cells, and studies using siRNA to suppress expression of glypican-4 (GPC4), a known modulator of the Wnt/PCP pathway revealed that GPC4 deficiency impairs Dex induced actin stress fiber formation, and activation of c-Jun N-terminal Kinase (JNK) and Rho kinase. Additionally, while Dex augmented, GPC4 deficiency suppressed the formation of actin stress fibers in TM cells in the presence of Dex and Wnt5a. Taken together, these results identify the GPC4-dependent Wnt/PCP signaling pathway as one of the crucial upstream regulators of Dex induced actin cytoskeletal reorganization and cell adhesion in TM cells, opening an opportunity to target the GPC4/Wnt/PCP pathway for treatment of ocular hypertension in glaucoma.
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Affiliation(s)
- Rupalatha Maddala
- Department of Ophthalmology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Camelia Eldawy
- Department of Ophthalmology, Duke University School of Medicine, Durham, North Carolina, USA
| | - William Bachman
- Department of Ophthalmology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Erik J Soderblom
- Proteomics and Metabolomics Shared Resource, Duke University School of Medicine, Duke Center for Genomic and Computational Biology, Durham, North Carolina, USA
| | - Ponugoti V Rao
- Department of Ophthalmology, Duke University School of Medicine, Durham, North Carolina, USA
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, North Carolina, USA
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Biomolecular condensate assembly of nArgBP2 tunes its functionality to manifest the structural plasticity of dendritic spines. Exp Mol Med 2023; 55:108-119. [PMID: 36599935 PMCID: PMC9898538 DOI: 10.1038/s12276-022-00918-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 11/07/2022] [Accepted: 11/09/2022] [Indexed: 01/05/2023] Open
Abstract
nArgBP2, a candidate gene for intellectual disability, is a postsynaptic protein critical for dendritic spine development and morphogenesis, and its knockdown (KD) in developing neurons severely impairs spine-bearing excitatory synapse formation. Surprisingly, nArgBP2 KD in mature neurons did not cause morphological defects in the existing spines at rest, raising questions of how it functions in mature neurons. We found that unlike its inaction at rest, nArgBP2 KD completely inhibited the enlargement of dendritic spines during chemically induced long-term potentiation (cLTP) in mature neurons. We further found that nArgBP2 forms condensates in dendritic spines and that these condensates are dispersed by cLTP, which spatiotemporally coincides with spine head enlargement. Condensates with CaMKII phosphorylation-deficient mutant or CaMKII inhibition are neither dispersed nor accompanied by spine enlargement during cLTP. We found that nArgBP2 condensates in spines exhibited liquid-like properties, and in heterologous and in vitro expression systems, nArgBP2 undergoes liquid-liquid phase separation via multivalent intermolecular interactions between SH3 domains and proline-rich domains. It also forms coacervates with CaMKIIα, which is rapidly dissembled by calcium/CaMKIIα-dependent phosphorylation. We further showed that the interaction between nArgBP2 and WAVE1 competes with nArgBP2 phase separation and that blocking the nArgBP2-WAVE1 interaction prevents spine enlargement during cLTP. Together, our results suggest that nArgBP2 at rest is confined to the condensates but is released by CaMKIIα-mediated phosphorylation during synaptic plasticity, which regulates its timely interaction with WAVE1 to induce spine head enlargement in mature neurons.
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SORBS2 upregulation may contribute to dysfunction in LVNC via the Notch pathway. Acta Biochim Biophys Sin (Shanghai) 2022; 55:327-329. [PMID: 36514223 PMCID: PMC10157613 DOI: 10.3724/abbs.2022177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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7
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Advances in the previous two decades in our understanding of the post-translational modifications, functions, and drug perspectives of ArgBP2 and its family members. Biomed Pharmacother 2022; 155:113853. [DOI: 10.1016/j.biopha.2022.113853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/28/2022] [Accepted: 10/06/2022] [Indexed: 11/20/2022] Open
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8
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Influence of Shear Stress, Inflammation and BRD4 Inhibition on Human Endothelial Cells: A Holistic Proteomic Approach. Cells 2022; 11:cells11193086. [PMID: 36231049 PMCID: PMC9563250 DOI: 10.3390/cells11193086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/26/2022] [Accepted: 09/28/2022] [Indexed: 11/17/2022] Open
Abstract
Atherosclerosis is an important risk factor in the development of cardiovascular diseases. In addition to increased plasma lipid concentrations, irregular/oscillatory shear stress and inflammatory processes trigger atherosclerosis. Inhibitors of the transcription modulatory bromo- and extra-terminal domain (BET) protein family (BETi) could offer a possible therapeutic approach due to their epigenetic mechanism and anti-inflammatory properties. In this study, the influence of laminar shear stress, inflammation and BETi treatment on human endothelial cells was investigated using global protein expression profiling by ion mobility separation-enhanced data independent acquisition mass spectrometry (IMS-DIA-MS). For this purpose, primary human umbilical cord derived vascular endothelial cells were treated with TNFα to mimic inflammation and exposed to laminar shear stress in the presence or absence of the BRD4 inhibitor JQ1. IMS-DIA-MS detected over 4037 proteins expressed in endothelial cells. Inflammation, shear stress and BETi led to pronounced changes in protein expression patterns with JQ1 having the greatest effect. To our knowledge, this is the first proteomics study on primary endothelial cells, which provides an extensive database for the effects of shear stress, inflammation and BETi on the endothelial proteome.
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McLendon JM, Zhang X, Matasic DS, Kumar M, Koval OM, Grumbach IM, Sadayappan S, London B, Boudreau RL. Knockout of Sorbin And SH3 Domain Containing 2 (Sorbs2) in Cardiomyocytes Leads to Dilated Cardiomyopathy in Mice. J Am Heart Assoc 2022; 11:e025687. [PMID: 35730644 PMCID: PMC9333371 DOI: 10.1161/jaha.122.025687] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Background Sorbin and SH3 domain containing 2 (Sorbs2) protein is a cytoskeletal adaptor with an emerging role in cardiac biology and disease; yet, its potential relevance to adult‐onset cardiomyopathies remains underexplored. Sorbs2 global knockout mice display lethal arrhythmogenic cardiomyopathy; however, the causative mechanisms remain unclear. Herein, we examine Sorbs2 dysregulation in heart failure, characterize novel Sorbs2 cardiomyocyte‐specific knockout mice (Sorbs2‐cKO), and explore associations between Sorbs2 genetic variations and human cardiovascular disease. Methods and Results Bioinformatic analyses show myocardial Sorbs2 mRNA is consistently upregulated in humans with adult‐onset cardiomyopathies and in heart failure models. We generated Sorbs2‐cKO mice and report that they develop progressive systolic dysfunction and enlarged cardiac chambers, and they die with congestive heart failure at about 1 year old. After 3 months, Sorbs2‐cKO mice begin to show atrial enlargement and P‐wave anomalies, without dysregulation of action potential–associated ion channel and gap junction protein expressions. After 6 months, Sorbs2‐cKO mice exhibit impaired contractility in dobutamine‐treated hearts and skinned myofibers, without dysregulation of contractile protein expressions. From our comprehensive survey of potential mechanisms, we found that within 4 months, Sorbs2‐cKO hearts have defective microtubule polymerization and compensatory upregulation of structural cytoskeletal and adapter proteins, suggesting that this early intracellular structural remodeling is responsible for contractile dysfunction. Finally, we identified genetic variants that associate with decreased Sorbs2 expression and human cardiac phenotypes, including conduction abnormalities, atrial enlargement, and dilated cardiomyopathy, consistent with Sorbs2‐cKO mice phenotypes. Conclusions Our studies show that Sorbs2 is essential for maintaining structural integrity in cardiomyocytes, likely through strengthening the interactions between microtubules and other cytoskeletal proteins at cross‐link sites.
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Affiliation(s)
- Jared M McLendon
- Department of Internal Medicine University of Iowa Carver College of Medicine Iowa City IA.,Abboud Cardiovascular Research Center University of Iowa Carver College of Medicine Iowa City IA
| | - Xiaoming Zhang
- Department of Internal Medicine University of Iowa Carver College of Medicine Iowa City IA.,Abboud Cardiovascular Research Center University of Iowa Carver College of Medicine Iowa City IA
| | - Daniel S Matasic
- Department of Internal Medicine University of Iowa Carver College of Medicine Iowa City IA.,Department of Molecular Physiology and Biophysics University of Iowa Carver College of Medicine Iowa City IA
| | - Mohit Kumar
- Department of Pharmacology and Systems Physiology University of Cincinnati OH.,Division of Cardiovascular Health and Disease Department of Internal Medicine Heart, Lung, and Vascular Institute University of Cincinnati OH
| | - Olha M Koval
- Department of Internal Medicine University of Iowa Carver College of Medicine Iowa City IA.,Abboud Cardiovascular Research Center University of Iowa Carver College of Medicine Iowa City IA
| | - Isabella M Grumbach
- Department of Internal Medicine University of Iowa Carver College of Medicine Iowa City IA.,Abboud Cardiovascular Research Center University of Iowa Carver College of Medicine Iowa City IA
| | - Sakthivel Sadayappan
- Department of Pharmacology and Systems Physiology University of Cincinnati OH.,Division of Cardiovascular Health and Disease Department of Internal Medicine Heart, Lung, and Vascular Institute University of Cincinnati OH
| | - Barry London
- Department of Internal Medicine University of Iowa Carver College of Medicine Iowa City IA.,Abboud Cardiovascular Research Center University of Iowa Carver College of Medicine Iowa City IA
| | - Ryan L Boudreau
- Department of Internal Medicine University of Iowa Carver College of Medicine Iowa City IA.,Abboud Cardiovascular Research Center University of Iowa Carver College of Medicine Iowa City IA
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10
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Bachman W, Maddala R, Chakraborty A, Eldawy C, Skiba NP, Rao PV. Glucocorticoids Preferentially Influence Expression of Nucleoskeletal Actin Network and Cell Adhesive Proteins in Human Trabecular Meshwork Cells. Front Cell Dev Biol 2022; 10:886754. [PMID: 35557957 PMCID: PMC9087352 DOI: 10.3389/fcell.2022.886754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 03/28/2022] [Indexed: 12/02/2022] Open
Abstract
Clinical use of glucocorticoids is associated with increased intraocular pressure (IOP), a major risk factor for glaucoma. Glucocorticoids have been reported to induce changes in actin cytoskeletal organization, cell adhesion, extracellular matrix, fibrogenic activity, and mechanical properties of trabecular meshwork (TM) tissue, which plays a crucial role in aqueous humor dynamics and IOP homeostasis. However, we have a limited understanding of the molecular underpinnings regulating these myriad processes in TM cells. To understand how proteins, including cytoskeletal and cell adhesion proteins that are recognized to shuttle between the cytosolic and nuclear regions, influence gene expression and other cellular activities, we used proteomic analysis to characterize the nuclear protein fraction of dexamethasone (Dex) treated human TM cells. Treatment of human TM cells with Dex for 1, 5, or 7 days led to consistent increases (by ≥ two-fold) in the levels of various actin cytoskeletal regulatory, cell adhesive, and vesicle trafficking proteins. Increases (≥two-fold) were also observed in levels of Wnt signaling regulator (glypican-4), actin-binding chromatin modulator (BRG1) and nuclear actin filament depolymerizing protein (MICAL2; microtubule-associated monooxygenase, calponin and LIM domain containing), together with a decrease in tissue plasminogen activator. These changes were independently further confirmed by immunoblotting analysis. Interestingly, deficiency of BRG1 expression blunted the Dex-induced increases in the levels of some of these proteins in TM cells. In summary, these findings indicate that the widely recognized changes in actin cytoskeletal and cell adhesive attributes of TM cells by glucocorticoids involve actin regulated BRG1 chromatin remodeling, nuclear MICAL2, and glypican-4 regulated Wnt signaling upstream of the serum response factor/myocardin controlled transcriptional activity.
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Affiliation(s)
- William Bachman
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, United States
| | - Rupalatha Maddala
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, United States
| | - Ayon Chakraborty
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, United States
| | - Camelia Eldawy
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, United States
| | - Nikolai P. Skiba
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, United States
| | - Ponugoti V. Rao
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, United States
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, United States
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11
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Zhang Y, Zhong Z, Li M, Chen J, Lin T, Sun J, Wang D, Mu Q, Su H, Wu N, Liu A, Yu Y, Zhang M, Liu Y, Guo J, Yu W. The roles and prognostic significance of ABI1-TSV-11 expression in patients with left-sided colorectal cancer. Sci Rep 2021; 11:10734. [PMID: 34031495 PMCID: PMC8144562 DOI: 10.1038/s41598-021-90220-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 05/07/2021] [Indexed: 12/24/2022] Open
Abstract
Abnormally expressed and/or phosphorylated Abelson interactor 1 (ABI1) participates in the metastasis and progression of colorectal cancer (CRC). ABI1 presents as at least 12 transcript variants (TSVs) by mRNA alternative splicing, but it is unknown which of them is involved in CRC metastasis and prognosis. Here, we firstly identified ABI1-TSV-11 as a key TSV affecting the metastasis and prognosis of left-sided colorectal cancer (LsCC) and its elevated expression is related to lymph node metastasis and shorter overall survival (OS) in LsCC by analyzing data from The Cancer Genome Atlas and TSVdb. Secondly, ABI1-TSV-11 overexpression promoted LoVo and SW480 cells adhesion and migration in vitro, and accelerated LoVo and SW480 cells lung metastasis in vivo. Finally, mechanism investigations revealed that ABI1-isoform-11 interacted with epidermal growth factor receptor pathway substrate 8 (ESP8) and regulated actin dynamics to affect LoVo and SW480 cells biological behaviors. Taken together, our data demonstrated that ABI1-TSV-11 plays an oncogenic role in LsCC, it is an independent risk factor of prognosis and may be a potential molecular marker and therapeutic target in LsCC.
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Affiliation(s)
- Yu Zhang
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
- Department of Gastroenterology, Peking University People's Hospital, Beijing, China
| | - Zhaohui Zhong
- Department of General Surgery, Peking University People's Hospital, Beijing, China
| | - Mei Li
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Jingyi Chen
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
- Department of Gastroenterology, Peking University People's Hospital, Beijing, China
| | - Tingru Lin
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
- Department of Gastroenterology, Peking University People's Hospital, Beijing, China
| | - Jie Sun
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Di Wang
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Qing Mu
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Huiting Su
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Na Wu
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Aiyu Liu
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Yimeng Yu
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Menglei Zhang
- Department of Animal Laboratory, Peking University People's Hospital, Beijing, China
| | - Yulan Liu
- Department of Gastroenterology, Peking University People's Hospital, Beijing, China
| | - Jingzhu Guo
- Department of Pediatric, Peking University People's Hospital, Beijing, China.
| | - Weidong Yu
- Department of Central Laboratory and Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China.
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12
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Cardiac Fibroblast-Induced Pluripotent Stem Cell-Derived Exosomes as a Potential Therapeutic Mean for Heart Failure. Int J Mol Sci 2020; 21:ijms21197215. [PMID: 33003641 PMCID: PMC7582575 DOI: 10.3390/ijms21197215] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/23/2020] [Accepted: 09/24/2020] [Indexed: 12/20/2022] Open
Abstract
The limited regenerative capacity of the injured myocardium leads to remodeling and often heart failure. Novel therapeutic approaches are essential. Induced pluripotent stem cells (iPSC) differentiated into cardiomyocytes are a potential future therapeutics. We hypothesized that organ-specific reprogramed fibroblasts may serve an advantageous source for future cardiomyocytes. Moreover, exosomes secreted from those cells may have a beneficial effect on cardiac differentiation and/or function. We compared RNA from different sources of human iPSC using chip gene expression. Protein expression was evaluated as well as exosome micro-RNA levels and their impact on embryoid bodies (EBs) differentiation. Statistical analysis identified 51 genes that were altered (p ≤ 0.05), and confirmed in the protein level, cardiac fibroblasts-iPSCs (CF-iPSCs) vs. dermal fibroblasts-iPSCs (DF-iPSCs). Several miRs were altered especially miR22, a key regulator of cardiac hypertrophy and remodeling. Lower expression of miR22 in CF-iPSCs vs. DF-iPSCs was observed. EBs treated with these exosomes exhibited more beating EBs p = 0.05. vs. control. We identify CF-iPSC and its exosomes as a potential source for cardiac recovery induction. The decrease in miR22 level points out that our CF-iPSC-exosomes are naïve of congestive heart cell memory, making them a potential biological source for future therapy for the injured heart.
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13
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Ding Y, Yang J, Chen P, Lu T, Jiao K, Tester DJ, Giudicessi JR, Jiang K, Ackerman MJ, Li Y, Wang DW, Lee H, Wang DW, Xu X. Knockout of SORBS2 Protein Disrupts the Structural Integrity of Intercalated Disc and Manifests Features of Arrhythmogenic Cardiomyopathy. J Am Heart Assoc 2020; 9:e017055. [PMID: 32808564 PMCID: PMC7660791 DOI: 10.1161/jaha.119.017055] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 07/13/2020] [Indexed: 12/21/2022]
Abstract
Background Sorbs2b (sorbin and SH3 domain-containing 2b) was recently identified as a cardiomyopathy gene from a zebrafish mutagenesis screen. However, cardiac functions of its mammalian ortholog remain elusive. Methods and Results We conducted a detailed expression and subcellular localization analysis of Sorbs2 ortholog in mice and a phenotypic characterization in Sorbs2 knockout mice. Sorbs2 is highly expressed in the mouse heart and encodes an adhesion junction/desmosome protein that is mainly localized to the intercalated disc. A mutation with near complete depletion of the Sorbs2 protein in mice results in phenotypes characteristic of human arrhythmogenic cardiomyopathy (ACM), including right ventricular dilation, right ventricular dysfunction, spontaneous ventricular tachycardia, and premature death. Sorbs2 is required to maintain the structural integrity of intercalated disc. Its absence resulted in profound cardiac electrical remodeling with impaired impulse conduction and action potential derangements. Targeted sequencing of human patients with ACM identified 2 rare splicing variants classified as likely pathogenic were in 2 unrelated individuals with ACM from a cohort of 59 patients with ACM. Conclusions The Sorbs2 knockout mouse manifests several key features reminiscent of human ACM. Although the candidacy of SORBS2 as a new ACM-susceptibility gene is supported by preliminary human genetics study, future validation in larger cohorts with ACM is needed.
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Affiliation(s)
- Yonghe Ding
- Department of Biochemistry and Molecular BiologyMayo ClinicRochesterMN
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
| | - Jingchun Yang
- Department of Biochemistry and Molecular BiologyMayo ClinicRochesterMN
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
| | - Peng Chen
- Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiologic DisordersDivision of CardiologyDepartments of Internal Medicine and Genetic Diagnosis CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina
| | - Tong Lu
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
| | - Kunli Jiao
- Department of Biochemistry and Molecular BiologyMayo ClinicRochesterMN
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
- Division of CardiologyXinhua HospitalShanghai Jiaotong UniversityShanghaiChina
| | | | | | - Kai Jiang
- Division of Nephrology and HypertensionMayo ClinicRochesterMN
| | - Michael J. Ackerman
- Department of Cardiovascular Medicine (Division of Heart Rhythm Services)Mayo ClinicRochesterMN
- Pediatric and Adolescent Medicine (Division of Pediatric Cardiology)Mayo ClinicRochesterMN
- Molecular Pharmacology and Experimental Therapeutics (Windland Smith Rice Sudden Death Genomics Laboratory)Mayo ClinicRochesterMN
| | - Yigang Li
- Division of CardiologyXinhua HospitalShanghai Jiaotong UniversityShanghaiChina
| | - Dao Wu Wang
- State Key Laboratory of Reproductive MedicineClinical Center of Reproductive Medicine and Department of CardiologyFirst Affiliated Hospital of Nanjing Medical UniversityNanjingChina
| | - HoN‐chi Lee
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
| | - Dao Wen Wang
- Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiologic DisordersDivision of CardiologyDepartments of Internal Medicine and Genetic Diagnosis CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina
| | - Xiaolei Xu
- Department of Biochemistry and Molecular BiologyMayo ClinicRochesterMN
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
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14
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Implications of the complex biology and micro-environment of cardiac sarcomeres in the use of high affinity troponin antibodies as serum biomarkers for cardiac disorders. J Mol Cell Cardiol 2020; 143:145-158. [PMID: 32442660 PMCID: PMC7235571 DOI: 10.1016/j.yjmcc.2020.05.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 05/15/2020] [Accepted: 05/16/2020] [Indexed: 02/06/2023]
Abstract
Cardiac troponin I (cTnI), the inhibitory-unit, and cardiac troponin T (cTnT), the tropomyosin-binding unit together with the Ca-binding unit (cTnC) of the hetero-trimeric troponin complex signal activation of the sarcomeres of the adult cardiac myocyte. The unique structure and heart myocyte restricted expression of cTnI and cTnT led to their worldwide use as biomarkers for acute myocardial infarction (AMI) beginning more than 30 years ago. Over these years, high sensitivity antibodies (hs-cTnI and hs-cTnT) have been developed. Together with careful determination of history, physical examination, and EKG, determination of serum levels using hs-cTnI and hs-cTnT permits risk stratification of patients presenting in the Emergency Department (ED) with chest pain. With the ability to determine serum levels of these troponins with high sensitivity came the question of whether such measurements may be of diagnostic and prognostic value in conditions beyond AMI. Moreover, the finding of elevated serum troponins in physiological states such as exercise and pathological states where cardiac myocytes may be affected requires understanding of how troponins may be released into the blood and whether such release may be benign. We consider these questions by relating membrane stability to the complex biology of troponin with emphasis on its sensitivity to the chemo-mechanical and micro-environment of the cardiac myocyte. We also consider the role determinations of serum troponins play in the precise phenotyping in personalized and precision medicine approaches to promote cardiac health. Serum levels of cardiac TnI and cardiac TnT permit stratification of patients with chest pain. Release of troponins into blood involves not only frank necrosis but also programmed necroptosis. Genome wide analysis of serum troponin levels in the general population may be prognostic about cardiovascular health. Significant levels of serum troponins with exhaustive exercise may not be benign. Troponin in serum can lead to important data related to personalized and precision medicine.
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15
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Li C, Liu F, Liu S, Pan H, Du H, Huang J, Xie Y, Li Y, Zhao R, Wei Y. Elevated myocardial SORBS2 and the underlying implications in left ventricular noncompaction cardiomyopathy. EBioMedicine 2020; 53:102695. [PMID: 32143182 PMCID: PMC7058526 DOI: 10.1016/j.ebiom.2020.102695] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 01/19/2023] Open
Abstract
Background Left ventricular noncompaction cardiomyopathy (LVNC) is a hereditary heart disease characterized by an excessive trabecular meshwork of deep intertrabecular recesses within the ventricular myocardium. The guidelines for management of LVNC patients aim to improve quality of life by preventing cardiac heart failure. However, the mechanism underlying LVNC-associated heart failure remains poorly understood. Methods Using protein mass spectrometry analysis, we established that Sorbin And SH3 Domain Containing 2 (SORBS2) is up-regulated in LVNC hearts without changes to structure proteins. We conducted in vivo experiments wherein the heart tissues of wild-type mice were injected with an AAV9 vector to overexpress SORBS2, followed by analysis using echocardiography, T-tubule analysis and Ca2+ imaging to identify functional and morphological changes. In addition, we analyzed the function and structure of SORBS2 overexpressing human embryonic stem cell (hESC) derived cardiomyocytes (hESC-CM) via immunoblotting, immunohistochemistry, immunofluorescence, and confocal Ca2+ imaging. Findings LVNC myocardial tissues feature strongly elevated expression of SORBS2, microtubule densification and redistribution of Junctophilin 2 (JP2). SORBS2 interacts with β-tubulin, promoting its polymerization in 293T cells and hESC-derived CMs. In vivo, cardiac dysfunction, β-tubulin densification, JP2 translocation, T-tubule disorganization and Ca2+ handling dysfunction were observed in mice overexpressing SORBS2. Interpretation We identified a novel mechanism through which SORBS2 interacts with β-tubulin and promotes microtubule densification, eventually effecting JP2 distribution and T-tubule, potentially contributing to heart failure in LVNC disease. Fund This work was supported by a CAMS Initiative for Innovative Medicine grant (CAMS-I2M, 2016-I2M-1-015 to Y.J.Wei)
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Affiliation(s)
- Chunyan Li
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, China
| | - Fan Liu
- Department of Human Anatomy, Histology and Embryology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Shenghua Liu
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, China
| | - Haizhou Pan
- Children's Heart Center, the Second Affiliated Hospital and Yuying Children's Hospital, Institute of Cardiovascular Development and Translational Medicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Haiwei Du
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, China
| | - Jian Huang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, China
| | - Yuanyuan Xie
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, China
| | - Yanfen Li
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, China
| | - Ranxu Zhao
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, China
| | - Yingjie Wei
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, China.
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16
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Jie R, Zhu P, Zhong J, Zhang Y, Wu H. LncRNA KCNQ1OT1 affects cell proliferation, apoptosis and fibrosis through regulating miR-18b-5p/SORBS2 axis and NF-ĸB pathway in diabetic nephropathy. Diabetol Metab Syndr 2020; 12:77. [PMID: 32905431 PMCID: PMC7469295 DOI: 10.1186/s13098-020-00585-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 08/21/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND It has been reported that long non-coding RNAs (lncRNAs) play vital roles in diabetic nephropathy (DN). Our study aims to research the function of lncRNA KCNQ1OT1 in DN cells and the molecular mechanism. METHODS Human glomerular mesangial cells (HGMCs) and human renal glomerular endothelial cells (HRGECs) were cultured in high glucose (30 mM) condition as models of DN cells. KCNQ1 opposite strand/antisense transcript 1 (KCNQ1OT1) and miR-18b-5p levels were detected by quantitative real-time polymerase chain reaction (qRT-PCR). The mRNA and protein levels of Sorbin and SH3 domain-containing protein 2 (SORBS2), Type IV collagen (Col-4), fibronectin (FN), transcriptional regulatory factor-beta 1 (TGF-β1), Twist, NF-κB and STAT3 were measured by qRT-PCR and western blot. Cell viability was detected by cell counting kit-8 (CCK-8) assay for selecting the proper concentration of glucose treatment. Additionally, 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) and flow cytometry assay were employed to determine cell proliferation and apoptosis, respectively. The targets of KCNQ1OT1 was predicted by online software and confirmed by dual-luciferase reporter assay. RESULTS KCNQ1OT1 and SORBS2 were elevated in DN. Both knockdown of KCNQ1OT1 and silencing of SORBS2 restrained proliferation and fibrosis and induced apoptosis in DN cells. Besides, Overexpression of SORBS2 restored the KCNQ1OT1 knockdown-mediate effects on proliferation, apoptosis and fibrosis in DN cells. In addition, miR-18b-5p served as a target of KCNQ1OT1 as well as targeted SORBS2. KCNQ1OT1 knockdown repressed NF-ĸB pathway. CONCLUSION KCNQ1OT1 regulated DN cells proliferation, apoptosis and fibrosis via KCNQ1OT1/miR-18b-5p/SORBS2 axis and NF-ĸB pathway.
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Affiliation(s)
- Ran Jie
- Department of Endocrinology, First People’s Hospital of Jingzhou, Shashi District, No. 8 Hangkong Road, Jingzhou, 434000 Hubei China
| | - Pengpeng Zhu
- Department of Anesthesiology, First People’s Hospital of Jingzhou, Jingzhou, 434000 Hubei China
| | - Jiao Zhong
- Health Management Center, First People’s Hospital of Jingzhou, Jingzhou, 434000 Hubei China
| | - Yan Zhang
- Department of Gastroenterology, First People’s Hospital of Jingzhou, Jingzhou, 434000 Hubei China
| | - Hongyan Wu
- Department of Endocrinology, First People’s Hospital of Jingzhou, Shashi District, No. 8 Hangkong Road, Jingzhou, 434000 Hubei China
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Schlaweck AE, Tazi-Ahnini R, Ü. Basmanav FB, Mohungoo J, Pasternack-Ziach SM, Mattheisen M, Oprisoreanu AM, Humbatova A, Wolf S, Messenger A, Betz RC. Autosomal-dominant hypotrichosis with woolly hair: Novel gene locus on chromosome 4q35.1-q35.2. PLoS One 2019; 14:e0225943. [PMID: 31790498 PMCID: PMC6886801 DOI: 10.1371/journal.pone.0225943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 11/15/2019] [Indexed: 11/18/2022] Open
Abstract
Hypotrichosis simplex (HS) with and without woolly hair (WH) comprises a group of rare, monogenic disorders of hair loss. Patients present with a diffuse loss of scalp and/or body hair, which usually begins in early childhood and progresses into adulthood. Some of the patients also show hair that is tightly curled. Approximately 10 genes for autosomal recessive and autosomal dominant forms of HS have been identified in the last decade, among them five genes for the dominant form. We collected blood and buccal samples from 17 individuals of a large British family with HS and WH. After having sequenced all known dominant genes for HS in this family without the identification of any disease causing mutation, we performed a genome-wide scan, using the HumanLinkage-24 BeadChip, followed by a classical linkage analysis; and whole exome-sequencing (WES). Evidence for linkage was found for a region on chromosome 4q35.1-q35.2 with a maximum LOD score of 3.61. WES led to the identification of a mutation in the gene SORBS2, encoding sorbin and SH3 domain containing 2. Unfortunately, we could not find an additional mutation in any other patient/family with HS; and in cell culture, we could not observe any difference between cloned wildtype and mutant SORBS2 using western blotting and immunofluorescence analyses. Therefore, at present, SORBS2 cannot be considered a definite disease gene for this phenotype. However, the locus on chromosome 4q is a robust and novel finding for hypotrichosis with woolly hair. Further fine mapping and sequencing efforts are therefore warranted in order to confirm SORBS2 as a plausible HS disease gene.
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Affiliation(s)
- Annika E. Schlaweck
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Rachid Tazi-Ahnini
- Department of Infection, Immunity, and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield, United Kingdom
| | - F. Buket Ü. Basmanav
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Javed Mohungoo
- Department of Dermatology, Royal Hallamshire Hospital, Sheffield, United Kingdom
| | - Sandra M. Pasternack-Ziach
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Manuel Mattheisen
- Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital Würzburg, Würzburg, Germany
| | - Ana-Maria Oprisoreanu
- Department of Neuropathology and Department of Epileptology, University Hospital Bonn, Bonn, Germany
| | - Aytaj Humbatova
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Sabrina Wolf
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Andrew Messenger
- Department of Dermatology, Royal Hallamshire Hospital, Sheffield, United Kingdom
| | - Regina C. Betz
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
- * E-mail:
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18
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Welsh P, Preiss D, Hayward C, Shah ASV, McAllister D, Briggs A, Boachie C, McConnachie A, Padmanabhan S, Welsh C, Woodward M, Campbell A, Porteous D, Mills NL, Sattar N. Cardiac Troponin T and Troponin I in the General Population. Circulation 2019; 139:2754-2764. [PMID: 31014085 PMCID: PMC6571179 DOI: 10.1161/circulationaha.118.038529] [Citation(s) in RCA: 195] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND There is great interest in widening the use of high-sensitivity cardiac troponins for population cardiovascular disease (CVD) and heart failure screening. However, it is not clear whether cardiac troponin T (cTnT) and troponin I (cTnI) are equivalent measures of risk in this setting. We aimed to compare and contrast (1) the association of cTnT and cTnI with CVD and non-CVD outcomes, and (2) their determinants in a genome-wide association study. METHODS High-sensitivity cTnT and cTnI were measured in serum from 19 501 individuals in Generation Scotland Scottish Family Health Study. Median follow-up was 7.8 years (quartile 1 to quartile 3, 7.1-9.2). Associations of each troponin with a composite CVD outcome (1177 events), CVD death (n=266), non-CVD death (n=374), and heart failure (n=216) were determined by using Cox models. A genome-wide association study was conducted using a standard approach developed for the cohort. RESULTS Both cTnI and cTnT were strongly associated with CVD risk in unadjusted models. After adjusting for classical risk factors, the hazard ratio for a 1 SD increase in log transformed troponin was 1.24 (95% CI, 1.17-1.32) and 1.11 (1.04-1.19) for cTnI and cTnT, respectively; ratio of hazard ratios 1.12 (1.04-1.21). cTnI, but not cTnT, was associated with myocardial infarction and coronary heart disease. Both cTnI and cTnT had strong associations with CVD death and heart failure. By contrast, cTnT, but not cTnI, was associated with non-CVD death; ratio of hazard ratios 0.77 (0.67-0.88). We identified 5 loci (53 individual single-nucleotide polymorphisms) that had genome-wide significant associations with cTnI, and a different set of 4 loci (4 single-nucleotide polymorphisms) for cTnT. CONCLUSIONS The upstream genetic causes of low-grade elevations in cTnI and cTnT appear distinct, and their associations with outcomes also differ. Elevations in cTnI are more strongly associated with some CVD outcomes, whereas cTnT is more strongly associated with the risk of non-CVD death. These findings help inform the selection of an optimal troponin assay for future clinical care and research in this setting.
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Affiliation(s)
- Paul Welsh
- Institute of Cardiovascular and Medical Sciences (P.W., S.P., C.W., N.S.), University of Glasgow, United Kingdom
| | - David Preiss
- MRC Population Health Research Unit, Clinical Trial Service Unit and Epidemiological Studies Unit (D. Preiss), University of Oxford, United Kingdom
| | - Caroline Hayward
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine (C.H.), University of Edinburgh, United Kingdom
| | - Anoop S V Shah
- BHF Centre for Cardiovascular Science (A.S.V.S., N.L.M.), University of Edinburgh, United Kingdom
| | - David McAllister
- Institute of Cardiovascular and Medical Sciences (P.W., S.P., C.W., N.S.), University of Glasgow, United Kingdom
| | - Andrew Briggs
- Institute of Health and Wellbeing (A.B.), University of Glasgow, United Kingdom
| | - Charles Boachie
- Robertson Centre for Biostatistics (C.B., A.M.), University of Glasgow, United Kingdom
| | - Alex McConnachie
- Robertson Centre for Biostatistics (C.B., A.M.), University of Glasgow, United Kingdom
| | - Sandosh Padmanabhan
- Institute of Cardiovascular and Medical Sciences (P.W., S.P., C.W., N.S.), University of Glasgow, United Kingdom
| | - Claire Welsh
- Institute of Cardiovascular and Medical Sciences (P.W., S.P., C.W., N.S.), University of Glasgow, United Kingdom
| | - Mark Woodward
- The George Institute for Global Health (M.W.), University of Oxford, United Kingdom.,The George Institute for Global Health, University of New South Wales, Sydney, Australia (M.W.).,Department of Epidemiology, Johns Hopkins University, Baltimore, MD (M.W.)
| | - Archie Campbell
- Centre for Genomic and Experimental Medicine, MRC Institute of Genetics and Molecular Medicine (A.C., D. Porteous), University of Edinburgh, United Kingdom.,Usher Institute for Population Health Sciences and Informatics (A.C.), University of Edinburgh, United Kingdom
| | - David Porteous
- Centre for Genomic and Experimental Medicine, MRC Institute of Genetics and Molecular Medicine (A.C., D. Porteous), University of Edinburgh, United Kingdom
| | - Nicholas L Mills
- BHF Centre for Cardiovascular Science (A.S.V.S., N.L.M.), University of Edinburgh, United Kingdom
| | - Naveed Sattar
- Institute of Cardiovascular and Medical Sciences (P.W., S.P., C.W., N.S.), University of Glasgow, United Kingdom
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19
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Velloso FJ, Campos AR, Sogayar MC, Correa RG. Proteome profiling of triple negative breast cancer cells overexpressing NOD1 and NOD2 receptors unveils molecular signatures of malignant cell proliferation. BMC Genomics 2019; 20:152. [PMID: 30791886 PMCID: PMC6385390 DOI: 10.1186/s12864-019-5523-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 02/08/2019] [Indexed: 02/06/2023] Open
Abstract
Background Triple negative breast cancer (TNBC) is a malignancy with very poor prognosis, due to its aggressive clinical characteristics and lack of response to receptor-targeted drug therapy. In TNBC, immune-related pathways are typically upregulated and may be associated with a better prognosis of the disease, encouraging the pursuit for immunotherapeutic options. A number of immune-related molecules have already been associated to the onset and progression of breast cancer, including NOD1 and NOD2, innate immune receptors of bacterial-derived components which activate pro-inflammatory and survival pathways. In the context of TNBC, overexpression of either NOD1or NOD2 is shown to reduce cell proliferation and increase clonogenic potential in vitro. To further investigate the pathways linking NOD1 and NOD2 signaling to tumorigenesis in TNBC, we undertook a global proteome profiling of TNBC-derived cells ectopically expressing each one of these NOD receptors. Results We have identified a total of 95 and 58 differentially regulated proteins in NOD1- and NOD2-overexpressing cells, respectively. We used bioinformatics analyses to identify enriched molecular signatures aiming to integrate the differentially regulated proteins into functional networks. These analyses suggest that overexpression of both NOD1 and NOD2 may disrupt immune-related pathways, particularly NF-κB and MAPK signaling cascades. Moreover, overexpression of either of these receptors may affect several stress response and protein degradation systems, such as autophagy and the ubiquitin-proteasome complex. Interestingly, the levels of several proteins associated to cellular adhesion and migration were also affected in these NOD-overexpressing cells. Conclusions Our proteomic analyses shed new light on the molecular pathways that may be modulating tumorigenesis via NOD1 and NOD2 signaling in TNBC. Up- and downregulation of several proteins associated to inflammation and stress response pathways may promote activation of protein degradation systems, as well as modulate cell-cycle and cellular adhesion proteins. Altogether, these signals seem to be modulating cellular proliferation and migration via NF-κB, PI3K/Akt/mTOR and MAPK signaling pathways. Further investigation of altered proteins in these pathways may provide more insights on relevant targets, possibly enabling the immunomodulation of tumorigenesis in the aggressive TNBC phenotype. Electronic supplementary material The online version of this article (10.1186/s12864-019-5523-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fernando J Velloso
- Cell and Molecular Therapy Center (NUCEL), Internal Medicine Department, School of Medicine, University of São Paulo (USP), São Paulo, SP, 05360-130, Brazil
| | - Alexandre R Campos
- SBP Medical Discovery Institute, 10901 North Torrey Pines Rd, La Jolla, CA, 92037, USA
| | - Mari C Sogayar
- Cell and Molecular Therapy Center (NUCEL), Internal Medicine Department, School of Medicine, University of São Paulo (USP), São Paulo, SP, 05360-130, Brazil
| | - Ricardo G Correa
- SBP Medical Discovery Institute, 10901 North Torrey Pines Rd, La Jolla, CA, 92037, USA.
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BMP-dependent synaptic development requires Abi-Abl-Rac signaling of BMP receptor macropinocytosis. Nat Commun 2019; 10:684. [PMID: 30737382 PMCID: PMC6368546 DOI: 10.1038/s41467-019-08533-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 01/09/2019] [Indexed: 12/01/2022] Open
Abstract
Retrograde BMP trans-synaptic signaling is essential for synaptic development. Despite the importance of endocytosis-regulated BMP receptor (BMPR) control of this developmental signaling, the mechanism remains unknown. Here, we provide evidence that Abelson interactor (Abi), a substrate for Abl kinase and component of the SCAR/WAVE complex, links Abl and Rac1 GTPase signaling to BMPR macropinocytosis to restrain BMP-mediated synaptic development. We find that Abi acts downstream of Abl and Rac1, and that BMP ligand Glass bottom boat (Gbb) induces macropinocytosis dependent on Rac1/SCAR signaling, Abl-mediated Abi phosphorylation, and BMPR activation. Macropinocytosis acts as the major internalization route for BMPRs at the synapse in a process driven by Gbb activation and resulting in receptor degradation. Key regulators of macropinocytosis (Rabankyrin and CtBP) control BMPR trafficking to limit BMP trans-synaptic signaling. We conclude that BMP-induced macropinocytosis acts as a BMPR homeostatic mechanism to regulate BMP-mediated synaptic development. BMP ligands act as retrograde signalling molecules to regulate presynaptic development, and regulation of BMP receptors by endocytosis may be an important component of this signalling pathway. Here, the authors show that Abi-mediated macropinocytosis of BMP receptors in Drosophila larva and contributes to neuromuscular development.
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21
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Kuroda M, Ueda K, Kioka N. Vinexin family (SORBS) proteins regulate mechanotransduction in mesenchymal stem cells. Sci Rep 2018; 8:11581. [PMID: 30068914 PMCID: PMC6070524 DOI: 10.1038/s41598-018-29700-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 07/17/2018] [Indexed: 01/09/2023] Open
Abstract
The stiffness of extracellular matrix (ECM) directs the differentiation of mesenchymal stem cells (MSCs) through the transcriptional co-activators Yes-associated protein (YAP) and transcriptional coactivator with a PDZ-binding motif (TAZ). Although a recent study revealed the involvement of vinexin α and CAP (c-Cbl-associated proteins), two of vinexin (SORBS) family proteins that bind to vinculin, in mechanosensing, it is still unclear whether these proteins regulate mechanotransduction and differentiation of MSCs. In the present study, we show that both vinexin α and CAP are necessary for the association of vinculin with the cytoskeleton and the promotion of YAP/TAZ nuclear localization in MSCs grown on rigid substrates. Furthermore, CAP is involved in the MSC differentiation in a stiffness-dependent manner, whereas vinexin depletion suppresses adipocyte differentiation independently of YAP/TAZ. These observations reveal a critical role of vinexin α and CAP in mechanotransduction and MSC differentiation.
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Affiliation(s)
- Mito Kuroda
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Kazumitsu Ueda
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Sakyo, Kyoto, 606-8507, Japan
| | - Noriyuki Kioka
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto, 606-8502, Japan.
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Sakyo, Kyoto, 606-8507, Japan.
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22
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nArgBP2-SAPAP-SHANK, the core postsynaptic triad associated with psychiatric disorders. Exp Mol Med 2018; 50:1-9. [PMID: 29628500 PMCID: PMC5938024 DOI: 10.1038/s12276-017-0018-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 11/29/2017] [Indexed: 11/23/2022] Open
Abstract
Despite the complex genetic architecture, a broad spectrum of psychiatric disorders can still be caused by mutation(s) in the same gene. These disorders are interrelated with overlapping causative mechanisms including variations in the interaction among the risk-associated proteins that may give rise to the specific spectrum of each disorder. Additionally, multiple lines of evidence implicate an imbalance between excitatory and inhibitory neuronal activity (E/I imbalance) as the shared key etiology. Thus, understanding the molecular mechanisms underlying E/I imbalance provides essential insight into the etiology of these disorders. One important class of candidate risk genes is the postsynaptic scaffolding proteins, such as nArgBP2, SAPAP, and SHANK that regulate the actin cytoskeleton in dendritic spines of excitatory synapses. This review will cover and discuss recent studies that examined how these proteins, especially nArgBP2, are associated with psychiatric disorders. Next, we propose a possibility that variations in the interaction among these proteins in a specific brain region might contribute to the onset of diverse phenotypes of psychiatric disorders. The assembly of scaffolding proteins, key regulators of many signaling pathways, found in the brain’s synapses underpin a diverse range of neuropsychiatric disorders. Sunghoe Chang and colleagues from Seoul National University, South Korea, review how these postsynaptic proteins regulate the cellular cytoskeleton in nerve cell protrusions to maintain the balance between excitatory and inhibitory inputs in the brain. They discuss how perturbations in three particular proteins can cause an imbalance in synaptic signals that leads to conditions such as bipolar disorder, schizophrenia and autism. The authors propose that these proteins form a “core scaffolding triad” and interact in different ways to cause different mental illnesses. Dysregulation of these proteins could explain how mutations in the same genes, depending on whether they boost or decrease gene expression, contribute to the onset of diverse psychiatric disorders.
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23
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Loveless T, Qadota H, Benian GM, Hardin J. Caenorhabditis elegans SORB-1 localizes to integrin adhesion sites and is required for organization of sarcomeres and mitochondria in myocytes. Mol Biol Cell 2017; 28:3621-3633. [PMID: 28978740 PMCID: PMC5706990 DOI: 10.1091/mbc.e16-06-0455] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/18/2017] [Accepted: 09/25/2017] [Indexed: 01/07/2023] Open
Abstract
We have identified and characterized sorb-1, the only sorbin and SH3 domain-containing protein family member in Caenorhabditis elegans SORB-1 is strongly localized to integrin adhesion complexes in larvae and adults, including adhesion plaques and dense bodies (Z-disks) of striated muscles and attachment plaques of smooth muscles. SORB-1 is recruited to the actin-binding, membrane-distal regions of dense bodies via its C-terminal SH3 domains in an ATN-1(α-actinin)- and ALP-1(ALP/Enigma)-dependent manner, where it contributes to the organization of sarcomeres. SORB-1 is also found in other tissues known to be under mechanical stress, including stress fibers in migratory distal tip cells and the proximal gonad sheath, where it becomes enriched in response to tissue distention. We provide evidence for a novel role for sorbin family proteins: SORB-1 is required for normal positioning of the mitochondrial network in muscle cells. Finally, we demonstrate that SORB-1 interacts directly with two other dense body components, DEB-1(vinculin) and ZYX-1(zyxin). This work establishes SORB-1 as a bona fide sorbin family protein-one of the late additions to the dense body complex and a conserved regulator of body wall muscle sarcomere organization and organelle positioning.
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Affiliation(s)
- Timothy Loveless
- Program in Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, WI 53706
| | - Hiroshi Qadota
- Department of Pathology, Emory University, Atlanta, GA 30322
| | - Guy M Benian
- Department of Pathology, Emory University, Atlanta, GA 30322
| | - Jeff Hardin
- Program in Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, WI 53706
- Department of Integrative Biology, University of Wisconsin-Madison, Madison, WI 53706
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24
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Fredriksson-Lidman K, Van Itallie CM, Tietgens AJ, Anderson JM. Sorbin and SH3 domain-containing protein 2 (SORBS2) is a component of the acto-myosin ring at the apical junctional complex in epithelial cells. PLoS One 2017; 12:e0185448. [PMID: 28961272 PMCID: PMC5621683 DOI: 10.1371/journal.pone.0185448] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 09/12/2017] [Indexed: 12/30/2022] Open
Abstract
SORBS2 is a scaffolding protein associated with Abl/Arg non-receptor tyrosine kinase pathways and is known to interact with actin and several other cytoskeletal proteins in various cell types. Previous BioID proximity labeling of tight and adherens junction proteins suggested that SORBS2 is a component of the apical junction complex of epithelial cells. We asked whether SORBS2 plays a previously unappreciated role in controlling perijunctional actin and tight junction barrier function. Using super resolution imaging we confirmed that SORBS2 is localized at the apical junction complex but farther from the membrane than ZO-1 and located partially overlapping both the tight- and adherens junctions with a periodic concentration that alternates with myosin IIB in polarized epithelial cells. Overexpression of GFP-SORBS2 recruited alpha-actinin, vinculin and N-WASP, and possibly CIP4 to cellular junctions. However, CRISPR-Cas9 knock-out of SORBS2 did not alter the localization- or immunofluorescent staining intensity of these or several other junctional- and cytoskeletal proteins. SORBS2 knock-out also did not affect the barrier function as measured by TER and dextran flux; nor did it change actin-dependent junction re-assembly as measured by Ca2+-switch and Latrunculin-B wash-out assays. The kinetics of HGF-induced cell scattering and wound healing, and dextran flux increase induced by PDGF also were unaffected by SORBS2 knock-out. SORBS2 concentrates with apical junctional actin that accumulates in response to knock-down of ZO-1 and ZO-2. In spite of our finding that SORBS2 is clearly a component of the apical junction complex, it does not appear to be required for either normal tight- or adherens junction assembly, structure or function or for growth factor-mediated changes in tight junction dynamics.
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Affiliation(s)
- Karin Fredriksson-Lidman
- Laboratory of Tight Junction Structure and Function, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
| | - Christina M. Van Itallie
- Laboratory of Tight Junction Structure and Function, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Amber J. Tietgens
- Laboratory of Tight Junction Structure and Function, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - James M. Anderson
- Laboratory of Tight Junction Structure and Function, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States of America
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25
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Ichikawa T, Kita M, Matsui TS, Nagasato AI, Araki T, Chiang SH, Sezaki T, Kimura Y, Ueda K, Deguchi S, Saltiel AR, Kioka N. Vinexin family (SORBS) proteins play different roles in stiffness-sensing and contractile force generation. J Cell Sci 2017; 130:3517-3531. [PMID: 28864765 DOI: 10.1242/jcs.200691] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 08/10/2017] [Indexed: 12/17/2022] Open
Abstract
Vinexin, c-Cbl associated protein (CAP) and Arg-binding protein 2 (ArgBP2) constitute an adaptor protein family called the vinexin (SORBS) family that is targeted to focal adhesions (FAs). Although numerous studies have focused on each of the SORBS proteins and partially elucidated their involvement in mechanotransduction, a comparative analysis of their function has not been well addressed. Here, we established mouse embryonic fibroblasts that individually expressed SORBS proteins and analysed their functions in an identical cell context. Both vinexin-α and CAP co-localized with vinculin at FAs and promoted the appearance of vinculin-rich FAs, whereas ArgBP2 co-localized with α-actinin at the proximal end of FAs and punctate structures on actin stress fibers (SFs), and induced paxillin-rich FAs. Furthermore, both vinexin-α and CAP contributed to extracellular matrix stiffness-dependent vinculin behaviors, while ArgBP2 stabilized α-actinin on SFs and enhanced intracellular contractile forces. These results demonstrate the differential roles of SORBS proteins in mechanotransduction.
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Affiliation(s)
- Takafumi Ichikawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan.,Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Sakyo, Kyoto 606-8507, Japan
| | - Masahiro Kita
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Tsubasa S Matsui
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Showa, Nagoya 466-8555, Japan.,Division of Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Ayaka Ichikawa Nagasato
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Tomohiko Araki
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Showa, Nagoya 466-8555, Japan
| | - Shian-Huey Chiang
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Takuhito Sezaki
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Yasuhisa Kimura
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Kazumitsu Ueda
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan.,Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Sakyo, Kyoto 606-8507, Japan
| | - Shinji Deguchi
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Showa, Nagoya 466-8555, Japan.,Division of Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Alan R Saltiel
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Noriyuki Kioka
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan .,Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Sakyo, Kyoto 606-8507, Japan
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26
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nArgBP2 regulates excitatory synapse formation by controlling dendritic spine morphology. Proc Natl Acad Sci U S A 2016; 113:6749-54. [PMID: 27226294 DOI: 10.1073/pnas.1600944113] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Neural Abelson-related gene-binding protein 2 (nArgBP2) was originally identified as a protein that directly interacts with synapse-associated protein 90/postsynaptic density protein 95-associated protein 3 (SAPAP3), a postsynaptic scaffolding protein critical for the assembly of glutamatergic synapses. Although genetic deletion of nArgBP2 in mice leads to manic/bipolar-like behaviors resembling many aspects of symptoms in patients with bipolar disorder, the actual function of nArgBP2 at the synapse is completely unknown. Here, we found that the knockdown (KD) of nArgBP2 by specific small hairpin RNAs (shRNAs) resulted in a dramatic change in dendritic spine morphology. Reintroducing shRNA-resistant nArgBP2 reversed these defects. In particular, nArgBP2 KD impaired spine-synapse formation such that excitatory synapses terminated mostly at dendritic shafts instead of spine heads in spiny neurons, although inhibitory synapse formation was not affected. nArgBP2 KD further caused a marked increase of actin cytoskeleton dynamics in spines, which was associated with increased Wiskott-Aldrich syndrome protein-family verprolin homologous protein 1 (WAVE1)/p21-activated kinase (PAK) phosphorylation and reduced activity of cofilin. These effects of nArgBP2 KD in spines were rescued by inhibiting PAK or activating cofilin combined with sequestration of WAVE. Together, our results suggest that nArgBP2 functions to regulate spine morphogenesis and subsequent spine-synapse formation at glutamatergic synapses. They also raise the possibility that the aberrant regulation of synaptic actin filaments caused by reduced nArgBP2 expression may contribute to the manifestation of the synaptic dysfunction observed in manic/bipolar disorder.
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27
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Braun GS, Kuszka A, Dau C, Kriz W, Moeller MJ. Interaction of atypical cadherin Fat1 with SoHo adaptor proteins CAP/ponsin and ArgBP2. Biochem Biophys Res Commun 2016; 472:88-94. [PMID: 26903299 DOI: 10.1016/j.bbrc.2016.02.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 02/17/2016] [Indexed: 12/11/2022]
Abstract
Mammalian Fat1 is a giant atypical cadherin/tumor suppressor involved in the regulation of cellular orientation, migration, and growth. Fat1 is implicated in the development of the brain, eye, and kidney. Altered expression or mutations of FAT1 are also associated with cancer and facioscapulohumeral muscular dystrophy (FSHD). Yet, the mechanistic functions of this pathway remain incompletely understood. Here, we report the identification of Sorbin-homology (SoHo) proteins as novel interaction partners of Fat1 by virtue of a yeast-two-hybrid screen. SoHo proteins play diverse roles as adaptor proteins in cell signaling, cell adhesion and sarcomere architecture, including altered expression in cancer and FSHD. Specifically, we found SoHo proteins CAP/ponsin-1 and -2 (Sorbs1) and ArgBP2 (Sorbs2) to interact with the cytoplasmic domain of Fat1. We mapped the interaction to a prolin-rich classic type II PXXP motif within Fat1 and to the three Src-homology (SH3) domains within SoHo proteins using mutant expression in yeast, pulldown assays, and cell culture. Functionally, endogenous ponsin-2 expression of NRK-52E cells at cellular leading edges was lost upon knockdown of Fat1. In summary, our data point to an interaction of Fat1 with SoHo proteins that is able to recruit SoHo proteins to sites of Fat1 expression.
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Affiliation(s)
- Gerald S Braun
- Division of Nephrology and Immunology, RWTH Aachen University, Germany.
| | | | - Cécile Dau
- Kaiser-Franz-Josef-Spital mit Gottfried von Preyer'schem Kinderspital, Vienna, Austria
| | - Wilhelm Kriz
- Institute for Neuroanatomy, Medical Faculty Mannheim of the University of Heidelberg, Germany
| | - Marcus J Moeller
- Division of Nephrology and Immunology, RWTH Aachen University, Germany
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28
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Zhang Q, Gao X, Li C, Feliciano C, Wang D, Zhou D, Mei Y, Monteiro P, Anand M, Itohara S, Dong X, Fu Z, Feng G. Impaired Dendritic Development and Memory in Sorbs2 Knock-Out Mice. J Neurosci 2016; 36:2247-60. [PMID: 26888934 PMCID: PMC4756157 DOI: 10.1523/jneurosci.2528-15.2016] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 12/21/2015] [Accepted: 01/13/2016] [Indexed: 12/27/2022] Open
Abstract
Intellectual disability is a common neurodevelopmental disorder characterized by impaired intellectual and adaptive functioning. Both environmental insults and genetic defects contribute to the etiology of intellectual disability. Copy number variations of SORBS2 have been linked to intellectual disability. However, the neurobiological function of SORBS2 in the brain is unknown. The SORBS2 gene encodes ArgBP2 (Arg/c-Abl kinase binding protein 2) protein in non-neuronal tissues and is alternatively spliced in the brain to encode nArgBP2 protein. We found nArgBP2 colocalized with F-actin at dendritic spines and growth cones in cultured hippocampal neurons. In the mouse brain, nArgBP2 was highly expressed in the cortex, amygdala, and hippocampus, and enriched in the outer one-third of the molecular layer in dentate gyrus. Genetic deletion of Sorbs2 in mice led to reduced dendritic complexity and decreased frequency of AMPAR-miniature spontaneous EPSCs in dentate gyrus granule cells. Behavioral characterization revealed that Sorbs2 deletion led to a reduced acoustic startle response, and defective long-term object recognition memory and contextual fear memory. Together, our findings demonstrate, for the first time, an important role for nArgBP2 in neuronal dendritic development and excitatory synaptic transmission, which may thus inform exploration of neurobiological basis of SORBS2 deficiency in intellectual disability. SIGNIFICANCE STATEMENT Copy number variations of the SORBS2 gene are linked to intellectual disability, but the neurobiological mechanisms are unknown. We found that nArgBP2, the only neuronal isoform encoded by SORBS2, colocalizes with F-actin at neuronal dendritic growth cones and spines. nArgBP2 is highly expressed in the cortex, amygdala, and dentate gyrus in the mouse brain. Genetic deletion of Sorbs2 in mice leads to impaired dendritic complexity and reduced excitatory synaptic transmission in dentate gyrus granule cells, accompanied by behavioral deficits in acoustic startle response and long-term memory. This is the first study of Sorbs2 function in the brain, and our findings may facilitate the study of neurobiological mechanisms underlying SORBS2 deficiency in the development of intellectual disability.
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Affiliation(s)
- Qiangge Zhang
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Stanley Center for Psychiatric Research, Broad Institute of Massachusetts Institute of Technology, and Harvard, Cambridge, Massachusetts 02142
| | - Xian Gao
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Key Laboratory of Brain Functional Genomics (Ministry of Education and Science and Technology Commission of Shanghai Municipality), Institute of Cognitive Neuroscience, School of Psychology and Cognitive Science, East China Normal University, Shanghai 200062, China, Stanley Center for Psychiatric Research, Broad Institute of Massachusetts Institute of Technology, and Harvard, Cambridge, Massachusetts 02142
| | - Chenchen Li
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Stanley Center for Psychiatric Research, Broad Institute of Massachusetts Institute of Technology, and Harvard, Cambridge, Massachusetts 02142
| | - Catia Feliciano
- Champalimaud Neuroscience Programme, Champalimaud Center for the Unknown, Lisbon 1400-038, Portugal
| | - Dongqing Wang
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Dingxi Zhou
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, School of Life Sciences, Peking University, Beijing 100871, China, and
| | - Yuan Mei
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Patricia Monteiro
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Stanley Center for Psychiatric Research, Broad Institute of Massachusetts Institute of Technology, and Harvard, Cambridge, Massachusetts 02142
| | - Michelle Anand
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Shigeyoshi Itohara
- Laboratory of Behavioral Genetics, RIKEN Brain Science Institute, Wako 351-0198, Japan
| | - Xiaowei Dong
- Key Laboratory of Brain Functional Genomics (Ministry of Education and Science and Technology Commission of Shanghai Municipality), Institute of Cognitive Neuroscience, School of Psychology and Cognitive Science, East China Normal University, Shanghai 200062, China
| | - Zhanyan Fu
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Stanley Center for Psychiatric Research, Broad Institute of Massachusetts Institute of Technology, and Harvard, Cambridge, Massachusetts 02142
| | - Guoping Feng
- McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Key Laboratory of Brain Functional Genomics (Ministry of Education and Science and Technology Commission of Shanghai Municipality), Institute of Cognitive Neuroscience, School of Psychology and Cognitive Science, East China Normal University, Shanghai 200062, China, Stanley Center for Psychiatric Research, Broad Institute of Massachusetts Institute of Technology, and Harvard, Cambridge, Massachusetts 02142,
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29
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Robin JD, Ludlow AT, Batten K, Gaillard MC, Stadler G, Magdinier F, Wright WE, Shay JW. SORBS2 transcription is activated by telomere position effect-over long distance upon telomere shortening in muscle cells from patients with facioscapulohumeral dystrophy. Genome Res 2015; 25:1781-90. [PMID: 26359233 PMCID: PMC4665000 DOI: 10.1101/gr.190660.115] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 09/09/2015] [Indexed: 01/05/2023]
Abstract
DNA is organized into complex three-dimensional chromatin structures, but how this spatial organization regulates gene expression remains a central question. These DNA/chromatin looping structures can range in size from 10-20 kb (enhancers/repressors) to many megabases during intra- and inter-chromosomal interactions. Recently, the influence of telomere length on chromatin organization prior to senescence has revealed the existence of long-distance chromatin loops that dictate the expression of genes located up to 10 Mb from the telomeres (Telomere Position Effect-Over Long Distances [TPE-OLD]). Here, we demonstrate the existence of a telomere loop at the 4q35 locus involving the sorbin and SH3 domain-containing protein 2 gene, SORBS2, a skeletal muscle protein using a modification of the chromosome conformation capture method. The loop reveals a cis-acting mechanism modifying SORBS2 transcription. The expression of this gene is altered by TPE-OLD in myoblasts from patients affected with the age-associated genetic disease, facioscapulohumeral muscular dystrophy (FSHD1A, MIM 158900). SORBS2 is expressed in FSHD myoblasts with short telomeres, while not detectable in FSHD myoblasts with long telomeres or in healthy myoblasts regardless of telomere length. This indicates that TPE-OLD may modify the regulation of the 4q35 locus in a pathogenic context. Upon differentiation, both FSHD and healthy myotubes express SORBS2, suggesting that SORBS2 is normally up-regulated by maturation/differentiation of skeletal muscle and is misregulated by TPE-OLD-dependent variegation in FSHD myoblasts. These findings provide additional insights for the complexity and age-related symptoms of FSHD.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Biopsy
- Chromosome Deletion
- Chromosomes, Human, Pair 4
- DNA Methylation
- Epistasis, Genetic
- Gene Expression Regulation
- Genetic Loci
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism
- Humans
- In Situ Hybridization, Fluorescence
- Muscle Cells/metabolism
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Muscular Dystrophy, Facioscapulohumeral/genetics
- Muscular Dystrophy, Facioscapulohumeral/metabolism
- Muscular Dystrophy, Facioscapulohumeral/pathology
- MyoD Protein/genetics
- MyoD Protein/metabolism
- Myoblasts
- RNA-Binding Proteins
- Telomere/genetics
- Telomere Shortening
- Transcriptional Activation
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Affiliation(s)
- Jérôme D Robin
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Andrew T Ludlow
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Kimberly Batten
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas 75390, USA
| | | | - Guido Stadler
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas 75390, USA
| | | | - Woodring E Wright
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Jerry W Shay
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas 75390, USA; Center for Excellence in Genomics Medicine Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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30
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Tong Y, Li Y, Gu H, Wang C, Liu F, Shao Y, Li J, Cao L, Li F. Microchidia protein 2, MORC2, downregulates the cytoskeleton adapter protein, ArgBP2, via histone methylation in gastric cancer cells. Biochem Biophys Res Commun 2015; 467:821-7. [PMID: 26476214 DOI: 10.1016/j.bbrc.2015.10.059] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 10/10/2015] [Indexed: 11/18/2022]
Abstract
ArgBP2 is an adapter protein that plays an important role in actin-dependent processes such as cell adhesion and migration. However, its function and regulation mechanisms in gastric cancer have not yet been investigated. Here, we showed the low expression of ArgBP2 mRNA level in gastric tumor samples and its repressive function in the proliferation, migration, and invasion of gastric cancer cells. Then, we cloned and identified ArgBP2 promoter and verified that MORC2 bound to the promoter. Moreover, we demonstrated that MORC2 enhanced the recruitment of EZH2, which promoted the tri-methylation of H3K27, leading to the transcriptional repression of ArgBP2. Our results might thus contribute to understanding the molecular mechanisms of ArgBP2 regulation and suggesting ArgBP2 as a potential therapeutic target for gastric cancer.
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Affiliation(s)
- Yuxin Tong
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, Liaoning 110122, China
| | - Yan Li
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, Liaoning 110122, China
| | - Hui Gu
- Department of Key Laboratory of Health Ministry for Congenital Malformation Shengjing Hospital, China Medical University, Shenyang, Liaoning 110004, China
| | - Chunyu Wang
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, Liaoning 110122, China
| | - Funan Liu
- Department of Surgical Oncology, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China
| | - Yangguang Shao
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, Liaoning 110122, China
| | - Jiabin Li
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, Liaoning 110122, China
| | - Liu Cao
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, Liaoning 110122, China
| | - Feng Li
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, Liaoning 110122, China.
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31
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Vinexin β Interacts with Hepatitis C Virus NS5A, Modulating Its Hyperphosphorylation To Regulate Viral Propagation. J Virol 2015; 89:7385-400. [PMID: 25972535 DOI: 10.1128/jvi.00567-15] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 05/05/2015] [Indexed: 12/12/2022] Open
Abstract
UNLABELLED Hepatitis C virus (HCV) nonstructural protein 5A (NS5A) is essential for HCV genome replication and virion production and is involved in the regulation of multiple host signaling pathways. As a proline-rich protein, NS5A is capable of interacting with various host proteins containing Src homology 3 (SH3) domains. Previous studies have suggested that vinexin, a member of the sorbin homology (SoHo) adaptor family, might be a potential binding partner of NS5A by yeast two-hybrid screening. However, firm evidence for this interaction is lacking, and the significance of vinexin in the HCV life cycle remains unclear. In this study, we demonstrated that endogenously and exogenously expressed vinexin β coimmunoprecipitated with NS5A derived from different HCV genotypes. Two residues, tryptophan (W307) and tyrosine (Y325), in the third SH3 domain of vinexin β and conserved Pro-X-X-Pro-X-Arg motifs at the C terminus of NS5A were indispensable for the vinexin-NS5A interaction. Furthermore, downregulation of endogenous vinexin β significantly suppressed NS5A hyperphosphorylation and decreased HCV replication, which could be rescued by expressing a vinexin β short hairpin RNA-resistant mutant. We also found that vinexin β modulated the hyperphosphorylation of NS5A in a casein kinase 1α-dependent on manner. Taken together, our findings suggest that vinexin β modulates NS5A phosphorylation via its interaction with NS5A, thereby regulating HCV replication, implicating vinexin β in the viral life cycle. IMPORTANCE Hepatitis C virus (HCV) nonstructural protein NS5A is a phosphoprotein, and its phosphorylation states are usually modulated by host kinases and other viral nonstructural elements. Additionally, cellular factors containing Src homology 3 (SH3) domains have been reported to interact with proline-rich regions of NS5A. However, it is unclear whether there are any relationships between NS5A phosphorylation and the NS5A-SH3 interaction, and little is known about the significance of this interaction in the HCV life cycle. In this work, we demonstrate that vinexin β modulates NS5A hyperphosphorylation through the NS5A-vinexin β interaction. Hyperphosphorylated NS5A induced by vinexin β is casein kinase 1α dependent and is also crucial for HCV propagation. Overall, our findings not only elucidate the relationships between NS5A phosphorylation and the NS5A-SH3 interaction but also shed new mechanistic insight on Flaviviridae NS5A (NS5) phosphorylation. We believe that our results may afford the potential to offer an antiviral therapeutic strategy.
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Anekal PV, Yong J, Manser E. Arg kinase-binding protein 2 (ArgBP2) interaction with α-actinin and actin stress fibers inhibits cell migration. J Biol Chem 2014; 290:2112-25. [PMID: 25429109 DOI: 10.1074/jbc.m114.610725] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Cell migration requires dynamic remodeling of the actomyosin network. We report here that an adapter protein, ArgBP2, is a component of α-actinin containing stress fibers and inhibits migration. ArgBP2 is undetectable in many commonly studied cancer-derived cell lines. COS-7 and HeLa cells express ArgBP2 (by Western analysis), but expression was detectable only in approximately half the cells by immunofluorescence. Short term clonal analysis demonstrated 0.2-0.3% of cells switch ArgBP2 expression (on or off) per cell division. ArgBP2 can have a fundamental impact on the actomyosin network: ArgBP2 positive COS-7 cells, for example, are clearly distinguishable by their denser actomyosin (stress fiber) network. ArgBP2γ binding to α-actinin appears to underlie its ability to localize to stress fibers and decrease cell migration. We map a small α-actinin binding region in ArgBP2 (residues 192-228) that is essential for these effects. Protein kinase A phosphorylation of ArgBP2γ at neighboring Ser-259 and consequent 14-3-3 binding blocks its interaction with α-actinin. ArgBP2 is known to be down-regulated in some aggressively metastatic cancers. Our work provides a biochemical explanation for the anti-migratory effect of ArgBP2.
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Affiliation(s)
- Praju Vikas Anekal
- From the sGSK Group Institute of Molecular and Cell Biology (IMCB), Proteos Building, 61 Biopolis Drive, 138673 Singapore
| | - Jeffery Yong
- From the sGSK Group Institute of Molecular and Cell Biology (IMCB), Proteos Building, 61 Biopolis Drive, 138673 Singapore
| | - Ed Manser
- From the sGSK Group Institute of Molecular and Cell Biology (IMCB), Proteos Building, 61 Biopolis Drive, 138673 Singapore, the Institute of Medical Biology (IMB), 8A Biomedical Grove, 06-06 Immunos Building, 138648 Singapore, and the Department of Pharmacology, National University of Singapore, 119077 Singapore
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33
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Cabigas EB, Liu J, Boopathy AV, Che PL, Crawford BH, Baroi G, Bhutani S, Shen M, Wagner MB, Davis ME. Dysregulation of catalase activity in newborn myocytes during hypoxia is mediated by c-Abl tyrosine kinase. J Cardiovasc Pharmacol Ther 2014; 20:93-103. [PMID: 24831254 DOI: 10.1177/1074248414533746] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
In the adult heart, catalase (CAT) activity increases appropriately with increasing levels of hydrogen peroxide, conferring cardioprotection. This mechanism is absent in the newborn for unknown reasons. In the present study, we examined how the posttranslational modification of CAT contributes to its activation during hypoxia/ischemia and the role of c-Abl tyrosine kinase in this process. Hypoxia studies were carried out using primary cardiomyocytes from adult (>8 weeks) and newborn rats. Following hypoxia, the ratio of phosphorylated to total CAT and c-Abl in isolated newborn rat myocytes did not increase and were significantly lower (1.3- and 4.2-fold, respectively; P < .05) than their adult counterparts. Similarly, there was a significant association (P < .0005) between c-Abl and CAT in adult cells following hypoxia (30.9 ± 8.2 to 70.7 ± 13.1 au) that was absent in newborn myocytes. Although ubiquitination of CAT was higher in newborns compared to adults following hypoxia, inhibition of this did not improve CAT activity. When a c-Abl activator (5-(1,3-diaryl-1H-pyrazol-4-yl)hydantoin [DPH], 200 µmol/L) was administered prior to hypoxia, not only CAT activity was significantly increased (P < .05) but also phosphorylation levels were also significantly improved (P < .01) in these newborn myocytes. Additionally, ischemia-reperfusion (IR) studies were performed using newborn (4-5 days) rabbit hearts perfused in a Langendorff method. The DPH given as an intracardiac injection into the right ventricle of newborn rabbit resulted in a significant improvement (P < .002) in the recovery of developed pressure after IR, a key indicator of cardiac function (from 74.6% ± 6.6% to 118.7% ± 10.9%). In addition, CAT activity was increased 3.92-fold (P < .02) in the same DPH-treated hearts. Addition of DPH to adult rabbits in contrast had no significant effect (from 71.3% ± 10.7% to 59.4% ± 12.1%). Therefore, in the newborn, decreased phosphorylation of CAT by c-Abl potentially mediates IR-induced dysfunction, and activation of c-Abl may be a strategy to prevent ischemic injury associated with surgical procedures.
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Affiliation(s)
- E Bernadette Cabigas
- Wallace H. Coulter Department of Biomedical Engineering at Emory University and Georgia Institute of Technology, Atlanta, GA, USA Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Jie Liu
- Wallace H. Coulter Department of Biomedical Engineering at Emory University and Georgia Institute of Technology, Atlanta, GA, USA Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Archana V Boopathy
- Wallace H. Coulter Department of Biomedical Engineering at Emory University and Georgia Institute of Technology, Atlanta, GA, USA Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Pao Lin Che
- Wallace H. Coulter Department of Biomedical Engineering at Emory University and Georgia Institute of Technology, Atlanta, GA, USA Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Brian H Crawford
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA Emory+Children's Center for Cardiovascular Biology, Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Gitangali Baroi
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA Emory+Children's Center for Cardiovascular Biology, Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Srishti Bhutani
- Wallace H. Coulter Department of Biomedical Engineering at Emory University and Georgia Institute of Technology, Atlanta, GA, USA Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Ming Shen
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA Emory+Children's Center for Cardiovascular Biology, Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Mary B Wagner
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA Emory+Children's Center for Cardiovascular Biology, Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Michael E Davis
- Wallace H. Coulter Department of Biomedical Engineering at Emory University and Georgia Institute of Technology, Atlanta, GA, USA Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA Emory+Children's Center for Cardiovascular Biology, Children's Healthcare of Atlanta, Atlanta, GA, USA
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34
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Indolfi C, Curcio A. Stargazing microRNA maps a new miR-21 star for cardiac hypertrophy. J Clin Invest 2014; 124:1896-8. [PMID: 24743143 DOI: 10.1172/jci75801] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Left ventricular hypertrophy is an initial compensatory mechanism in response to cardiac stress that can degenerate into heart failure and sudden cardiac death. Recent studies have shown that microRNAs (miRs) regulate several aspects of cardiovascular diseases. In this issue of the JCI, Bang and colleagues identified an exosome-mediated communication mechanism between cardiac fibroblasts and cardiomyocytes. Specifically, cardiac fibroblasts secrete miR-enriched exosomes, which are subsequently taken up by cardiomyocytes, in which they alter gene expression. In particular, a passenger strand miR, miR-21*, was identified as a potent paracrine factor that induces cardiomyocyte hypertrophy when shuttled through exosomes. These advanced comprehensive analyses represent a major step forward in our understanding of cardiovascular physiopathology, providing a promising adjunctive target for possible therapeutic approaches, namely the miR-mediated paracrine signaling network.
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35
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Roignot J, Bonacci T, Ghigo E, Iovanna JL, Soubeyran P. Oligomerization and phosphorylation dependent regulation of ArgBP2 adaptive capabilities and associated functions. PLoS One 2014; 9:e87130. [PMID: 24475245 PMCID: PMC3903627 DOI: 10.1371/journal.pone.0087130] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 12/11/2013] [Indexed: 11/22/2022] Open
Abstract
ArgBP2 (Arg-Binding Protein 2/SORBS2) is an adaptor protein involved in cytoskeleton associated signal transduction, thereby regulating cell migration and adhesion. These features are associated with its antitumoral role in pancreatic cancer cells. Tyrosine phosphorylation of ArgBP2, mediated by c-Abl kinase and counterbalanced by PTP-PEST phosphatase, regulates many of its interactions. However, the exact mechanisms of action and of regulation of ArgBP2 remain largely unknown. We found that ArgBP2 has the capacity to form oligomers which are destabilized by tyrosine phosphorylation. We could show that ArgBP2 oligomerization involves the binding of one of its SH3 domains to a specific proline rich cluster. ArgBP2 self-association increases its binding to some of its molecular partners and decreased its affinity for others. Hence, the phosphorylation/oligomerization state of ArgBP2 directly regulates its functions by modulating its adaptive capabilities. Importantly, using a human pancreatic cancer cell model (MiaPaCa-2 cells), we could validate that this property of ArgBP2 is critical for its cytoskeleton associated functions. In conclusions, we describe a new mechanism of regulation of ArgBP2 where tyrosine phosphorylation of the protein interfere with a SH3 mediated self-interaction, thereby controlling its panel of interacting partners and related functions.
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Affiliation(s)
- Julie Roignot
- Centre de Recherche en Carcérologie de Marseille (CRCM), INSERM UMR 1068, CNRS UMR 7258, Aix-Marseille University and Institut Paoli-Calmettes, Marseille, France
| | - Thomas Bonacci
- Centre de Recherche en Carcérologie de Marseille (CRCM), INSERM UMR 1068, CNRS UMR 7258, Aix-Marseille University and Institut Paoli-Calmettes, Marseille, France
| | - Eric Ghigo
- URMITE-IRD198, CNRS UMR7278, INSERM U1095, Aix-Marseille Univ, Marseille, France
| | - Juan L. Iovanna
- Centre de Recherche en Carcérologie de Marseille (CRCM), INSERM UMR 1068, CNRS UMR 7258, Aix-Marseille University and Institut Paoli-Calmettes, Marseille, France
| | - Philippe Soubeyran
- Centre de Recherche en Carcérologie de Marseille (CRCM), INSERM UMR 1068, CNRS UMR 7258, Aix-Marseille University and Institut Paoli-Calmettes, Marseille, France
- * E-mail:
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Kakimoto Y, Ito S, Abiru H, Kotani H, Ozeki M, Tamaki K, Tsuruyama T. Sorbin and SH3 domain-containing protein 2 is released from infarcted heart in the very early phase: proteomic analysis of cardiac tissues from patients. J Am Heart Assoc 2013; 2:e000565. [PMID: 24342996 PMCID: PMC3886759 DOI: 10.1161/jaha.113.000565] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Few proteomic studies have examined human cardiac tissue following acute lethal infarction. Here, we applied a novel proteomic approach to formalin-fixed, paraffin-embedded human tissue and aimed to reveal the molecular changes in the very early phase of acute myocardial infarction. METHODS AND RESULTS Heart tissue samples were collected from 5 patients who died within 7 hours of myocardial infarction and from 5 age- and sex-matched control cases. Infarcted and control myocardia were histopathologically diagnosed and captured using laser microdissection. Proteins were extracted using an originally established method and analyzed using liquid chromatography-tandem mass spectrometry. The label-free quantification demonstrated that the levels of 21 proteins differed significantly between patients and controls. In addition to known biomarkers, the sarcoplasmic protein sorbin and SH3 domain-containing protein 2 (SORBS2) was greatly reduced in infarcted myocardia. Immunohistochemical analysis of cardiac tissues confirmed the decrease, and Western blot analysis showed a significant increase in serum sorbin and SH3 domain-containing protein 2 in acute myocardial infarction patients (n=10) compared with control cases (n=11). CONCLUSIONS Our advanced comprehensive analysis using patient tissues and serums indicated that sarcoplasmic sorbin and SH3 domain-containing protein 2 is released from damaged cardiac tissue into the bloodstream upon lethal acute myocardial infarction. The proteomic strategy presented here is based on precise microscopic findings and is quite useful for candidate biomarker discovery using human tissue samples stored in depositories.
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Affiliation(s)
- Yu Kakimoto
- Department of Forensic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
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37
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Kalwa H, Sartoretto JL, Sartoretto SM, Michel T. Angiotensin-II and MARCKS: a hydrogen peroxide- and RAC1-dependent signaling pathway in vascular endothelium. J Biol Chem 2012; 287:29147-58. [PMID: 22773836 DOI: 10.1074/jbc.m112.381517] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
MARCKS is an actin-binding protein that modulates vascular endothelial cell migration and cytoskeleton signaling (Kalwa, H., and Michel, T. (2011) J. Biol. Chem. 286, 2320-2330). Angiotensin-II is a vasoactive peptide implicated in vascular physiology as well as pathophysiology; the pathways connecting angiotensin-II and cytoskeletal remodeling are incompletely understood. Here we show that MARCKS is expressed in intact arterial preparations, with prominent staining of the endothelium. In endothelial cells, angiotensin-II-promoted MARCKS phosphorylation is abrogated by PEG-catalase, implicating endogenous H(2)O(2) in the angiotensin-II response. Studies using the H(2)O(2) biosensor HyPer2 reveal that angiotensin-II promotes increases in intracellular H(2)O(2). We used a Rac1 FRET biosensor to show that angiotensin-II promotes Rac1 activation that is attenuated by PEG-catalase. siRNA-mediated Rac1 knockdown blocks angiotensin-II-stimulated MARCKS phosphorylation. Cell imaging studies using a phosphoinositide 4,5-bisphosphate (PIP(2)) biosensor revealed that angiotensin-II PIP(2) regulation depends on MARCKS and H(2)O(2). siRNA-mediated knockdown of MARCKS or Rac1 attenuates receptor-mediated activation of the tyrosine kinase c-Abl and disrupts actin fiber formation. These studies establish a critical role for H(2)O(2) in angiotensin-II signaling to the endothelial cytoskeleton in a novel pathway that is critically dependent on MARCKS, Rac1, and c-Abl.
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Affiliation(s)
- Hermann Kalwa
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
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38
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Miyazaki K, Ohno K, Tamura N, Sasaki T, Sato K. CLP36 and RIL recruit α-actinin-1 to stress fibers and differentially regulate stress fiber dynamics in F2408 fibroblasts. Exp Cell Res 2012; 318:1716-25. [PMID: 22659164 DOI: 10.1016/j.yexcr.2012.05.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 05/01/2012] [Accepted: 05/06/2012] [Indexed: 01/09/2023]
Abstract
CLP36 is a member of the ALP/Enigma protein family and has been shown to be localized to stress fibers in various cells. We previously reported that depletion of CLP36 caused loss of stress fibers in BeWo choriocarcinoma cells, but it remains unclear how CLP36 contributes to stress fiber formation. In this study, we generated CLP36-depleted F2408 fibroblasts and found that stress fibers showed abnormal non-oriented organization in these cells. In addition to CLP36, F2408 cells contained RIL, another ALP/Enigma protein, and we demonstrated that RIL could compensate for the role of CLP36 in stress fiber formation. CLP36 and RIL form a complex with α-actinin-1 and palladin. We found a strong correlation between loss of CLP36/RIL and failure of α-actinin-1 or palladin to localize on stress fibers. In addition, time lapse observation revealed that incorporation of RIL stabilizes stress fibers and that CLP36 influences the dynamic architecture of these fibers. Our findings indicate that CLP36 and RIL have a redundant role in the formation of stress fibers, but have different effects on stress fiber dynamics in F2408 cells.
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Affiliation(s)
- Kazufumi Miyazaki
- Department of Anatomy, Hamamatsu University School of Medicine, 431-3192 Shizuoka, Japan.
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39
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Functional mechanisms and roles of adaptor proteins in abl-regulated cytoskeletal actin dynamics. JOURNAL OF SIGNAL TRANSDUCTION 2012; 2012:414913. [PMID: 22675626 PMCID: PMC3362954 DOI: 10.1155/2012/414913] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 03/16/2012] [Indexed: 01/20/2023]
Abstract
Abl is a nonreceptor tyrosine kinase and plays an essential role in the modeling and remodeling of F-actin by transducing extracellular signals. Abl and its paralog, Arg, are unique among the tyrosine kinase family in that they contain an unusual extended C-terminal half consisting of multiple functional domains. This structural characteristic may underlie the role of Abl as a mediator of upstream signals to downstream signaling machineries involved in actin dynamics. Indeed, a group of SH3-containing accessory proteins, or adaptor proteins, have been identified that bind to a proline-rich domain of the C-terminal portion of Abl and modulate its kinase activity, substrate recognition, and intracellular localization. Moreover, the existence of signaling cascade and biological outcomes unique to each adaptor protein has been demonstrated. In this paper, we summarize functional roles and mechanisms of adaptor proteins in Abl-regulated actin dynamics, mainly focusing on a family of adaptor proteins, Abi. The mechanism of Abl's activation and downstream signaling mediated by Abi is described in comparison with those by another adaptor protein, Crk.
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40
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Cell biological characterization of a multidomain adaptor protein, ArgBP2, in epithelial NMuMG cells, and identification of a novel short isoform. Med Mol Morphol 2012; 45:22-8. [PMID: 22431180 DOI: 10.1007/s00795-010-0537-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 12/27/2010] [Indexed: 10/28/2022]
Abstract
ArgBP2 is a member of the SoHo (sorbin-homology) family of adaptor proteins believed to play roles in cell adhesion, cytoskeletal organization, and signaling. We show here a novel splicing isoform of ArgBP2, i.e., ArgBP2™, composed of only three SH3 (src-homology 3) domains and structurally similar to vinexinß. We then characterized the biochemical and cell biological properties of ArgBP2 to compare these with vinexin. Similar to vinexin, ArgBP2 was enriched at focal adhesions in REF52 fibroblast cells and induced anchorage-dependent extracellular signal-regulated kinase activation in NIH3T3 fibroblast cells. In epithelial NMuMG cells, immunofluorescence analyses revealed localization of ArgBP2 at tight junctions (TJs), whereas vinexin was distributed in cytoplasm as well as cell-cell boundaries. During TJ formation, recruitment of ZO-1 to TJs was followed by ArgBP2. Based on mutation analyses, a second SH3 domain was found to be important for ArgBP2 localization to the cell-cell contact sites. These data suggest some role of ArgBP2 in NMuMG cells at TJs that may be distinct from the function of vinexin.
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Park S, Kim D, Dan HC, Chen H, Testa JR, Cheng JQ. Identification of Akt interaction protein PHF20/TZP that transcriptionally regulates p53. J Biol Chem 2012; 287:11151-63. [PMID: 22334668 DOI: 10.1074/jbc.m111.333922] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Akt regulates a diverse array of cellular functions, including cell survival, proliferation, differentiation, and metabolism. Although a number of molecules have been identified as upstream regulators and downstream targets of Akt, the mechanisms by which Akt regulates these cellular processes remain elusive. Here, we demonstrate that a novel transcription factor, PHF20/TZP (referring to Tudor and zinc finger domain containing protein), binds to Akt and induces p53 expression at the transcription level. Knockdown of PHF20 significantly reduces p53. PHF20 inhibits cell growth, DNA synthesis, and cell survival. Akt phosphorylates PHF20 at Ser(291) in vitro and in vivo, which results in its translocation from the nucleus to the cytoplasm and attenuation of PHF20 function. These data indicate that PHF20 is a substrate of Akt and plays a role in Akt cell survival/growth signaling.
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Affiliation(s)
- Sungman Park
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, USA
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42
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Targeted proteomics of isolated glomeruli from the kidneys of diabetic rats: sorbin and SH3 domain containing 2 is a novel protein associated with diabetic nephropathy. EXPERIMENTAL DIABETES RESEARCH 2011; 2011:979354. [PMID: 22007191 PMCID: PMC3189611 DOI: 10.1155/2011/979354] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 08/02/2011] [Accepted: 08/04/2011] [Indexed: 11/18/2022]
Abstract
To evaluate proteins associated with the development of diabetic nephropathy, a major cause of the end-stage renal disease, we analyzed protein expression in isolated glomeruli from spontaneous type 2 diabetic (OLETF) rats and their age-matched control littermates (LETO) in the early and proteinuric stages of diabetic nephropathy using QSTAR Elite LC-MS/MS. Among the 191 and 218 proteins that were altered significantly in the OLETF rats, twenty-four were actin cytoskeleton-associated proteins implicated in the formation of stress fibers, and the impairment of actin polymerization, intermediate filaments and microtubules. Importantly, sorbin and SH3 domain containing 2 (SORBS2), which is involved in the formation of stress fibers, was significantly upregulated in both stages of diabetic nephropathy (1.49- and 1.97-fold, resp.). Immunohistochemical and quantitative-PCR analyses revealed upregulation of SORBS2 in podocytes of glomeruli of OLETF rats. Our findings suggested that SORBS2 may be associated with the development of diabetic nephropathy possibility by reorganization of actin filaments.
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Backsch C, Rudolph B, Steinbach D, Scheungraber C, Liesenfeld M, Häfner N, Hildner M, Habenicht A, Runnebaum IB, Dürst M. An integrative functional genomic and gene expression approach revealed SORBS2 as a putative tumour suppressor gene involved in cervical carcinogenesis. Carcinogenesis 2011; 32:1100-6. [PMID: 21602178 DOI: 10.1093/carcin/bgr093] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Human papillomavirus (HPV) types 16 and 18 are known to play a major role in cervical carcinogenesis. However, additional genetic alterations are required for the development and progression of cervical cancer. Our aim was to identify genes which are consistently down-regulated in cervical cancers (CxCa) and which are likely to contribute to malignant transformation. Microarray analyses of RNA from high-grade cervical precancers (CIN2/3) and CxCa were performed to screen for putative tumour suppressor genes (TSG) in predefined regions on chromosomes 4 and 10. Validation of the candidate genes was done by quantitative reverse transcription-polymerase chain reaction (qRT-PCR) in 16 normal cervical tissues, 14 CIN2/3 and 16 CxCa. The two most promising genes, SORBS2 and CALML5, were expressed ectopically in various cell lines in order to analyse their functional activity. Reconstitution of SORBS2 expression resulted in a significant reduction in cell proliferation, colony formation and anchorage-independent growth in CaSki, HPKII and HaCaT cells, whereby anchorage-independent growth could only be investigated for CaSki cells. SORBS2 had no effect on cell migration. In contrast, reconstitution of CALML5 expression did not influence the phenotype of all cell lines tested. None of the genes could induce senescence or apoptosis. Our results underline a possible role of SORBS2 as a TSG in cervical carcinogenesis.
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Affiliation(s)
- Claudia Backsch
- Klinik für Frauenheilkunde und Geburtshilfe, Abteilung Frauenheilkunde, Universitätsklinikum Jena, Bachstrasse 18, 07743 Jena, Germany
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Sanger JM, Wang J, Gleason LM, Chowrashi P, Dube DK, Mittal B, Zhukareva V, Sanger JW. Arg/Abl-binding protein, a Z-body and Z-band protein, binds sarcomeric, costameric, and signaling molecules. Cytoskeleton (Hoboken) 2010; 67:808-23. [PMID: 20886612 DOI: 10.1002/cm.20490] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Revised: 09/22/2010] [Accepted: 09/23/2010] [Indexed: 12/14/2022]
Abstract
ArgBP2 (Arg/Abl-Binding Protein) is expressed at high levels in the heart and is localized in the Z-bands of mature myofibrils. ArgBP2 is a member of a small family of proteins that also includes vinexin and CAP (c-Cbl-associated protein), all characterized by having one sorbin homology (SOHO) domain and three C-terminal SH3 domains. Antibodies directed against ArgBP2 also react with the Z-bodies of myofibril precursors: premyofibrils and nascent myofibrils. Expression in cardiomyocytes of plasmids encoding Yellow Fluorescent Protein (YFP) fused to either full length ArgBP2, the SOHO, mid-ArgBP or the SH3 domains of ArgBP2 led to Z-band targeting of the fusion proteins, whereas an N-terminal fragment lacking these domains did not target to Z-bands. Although ArgBP2 is not found in skeletal muscle cells, YFP-ArgBP2 did target to Z-bodies and Z-bands in cultured myotubes. GST-ArgBP2-SH3 bound actin, α-actinin and vinculin proteins in blot overlays, cosedimentation assays, and EM negative staining techniques. Over-expression of ArgBP2 and ArgBP2-SH3 domains, but not YFP alone, led to loss of myofibrils in cardiomyocytes. Fluorescence recovery after photobleaching was used to measure the rapid dynamics of both the full length and some truncated versions of ArgBP2. Our results indicate that ArgBP2 may play an important role in the assembly and maintenance of myofibrils in cardiomyocytes.
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Affiliation(s)
- Jean M Sanger
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York 13210, USA.
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Quantitative proteomic analysis of S-nitrosated proteins in diabetic mouse liver with ICAT switch method. Protein Cell 2010; 1:675-87. [PMID: 21203939 DOI: 10.1007/s13238-010-0087-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Accepted: 06/22/2010] [Indexed: 12/29/2022] Open
Abstract
In this study we developed a quantitative proteomic method named ICAT switch by introducing isotope-coded affinity tag (ICAT) reagents into the biotin-switch method, and used it to investigate S-nitrosation in the liver of normal control C57BL/6J mice and type 2 diabetic KK-Ay mice. We got fifty-eight S-nitrosated peptides with quantitative information in our research, among which thirty-seven had changed S-nitrosation levels in diabetic mouse liver. The S-nitrosated peptides belonged to forty-eight proteins (twenty-eight were new S-nitrosated proteins), some of which were new targets of S-nitrosation and known to be related with diabetes. S-nitrosation patterns were different between diabetic and normal mice. Gene ontology enrichment results suggested that S-nitrosated proteins are more abundant in amino acid metabolic processes. The network constructed for S-nitrosated proteins by text-mining technology provided clues about the relationship between S-nitrosation and type 2 diabetes. Our work provides a new approach for quantifying S-nitrosated proteins and suggests that the integrative functions of S-nitrosation may take part in pathophysiological processes of type 2 diabetes.
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Kioka N, Ito T, Yamashita H, Uekawa N, Umemoto T, Motoyoshi S, Imai H, Takahashi K, Watanabe H, Yamada M, Ueda K. Crucial role of vinexin for keratinocyte migration in vitro and epidermal wound healing in vivo. Exp Cell Res 2010; 316:1728-38. [PMID: 20361963 DOI: 10.1016/j.yexcr.2010.03.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 03/21/2010] [Accepted: 03/23/2010] [Indexed: 02/03/2023]
Abstract
In the process of tissue injury and repair, epithelial cells rapidly migrate and form epithelial sheets. Vinexin is a cytoplasmic molecule of the integrin-containing cell adhesion complex localized at focal contacts in vitro. Here, we investigated the roles of vinexin in keratinocyte migration in vitro and wound healing in vivo. Vinexin knockdown using siRNA delayed migration of both HaCaT human keratinocytes and A431 epidermoid carcinoma cells in scratch assay but did not affect cell proliferation. Induction of cell migration by scratching the confluent monolayer culture of these cells activated both EGFR and ERK, and their inhibitors AG1478 and U0126 substantially suppressed scratch-induced keratinocyte migration. Vinexin knockdown in these cells inhibited the scratch-induced activation of EGFR, but not that of ERK, suggesting that vinexin promotes cell migration via activation of EGFR. We further generated vinexin (-/-) mice and isolated their keratinocytes. They similarly showed slow migration in scratch assay. Furthermore, vinexin (-/-) mice exhibited a delay in cutaneous wound healing in both the back skin and tail without affecting the proliferation of keratinocytes. Together, these results strongly suggest a crucial role of vinexin in keratinocyte migration in vitro and cutaneous wound healing in vivo.
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Affiliation(s)
- Noriyuki Kioka
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan.
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Georgomanolis T, Iatrou K, Swevers L. BmCAP, a silkmoth gene encoding multiple protein isoforms characterized by SoHo and SH3 domains: expression analysis during ovarian follicular development. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2009; 39:892-902. [PMID: 19861164 DOI: 10.1016/j.ibmb.2009.10.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Revised: 10/20/2009] [Accepted: 10/21/2009] [Indexed: 05/28/2023]
Abstract
CAP/ArgBP2/vinexin family proteins, adaptor proteins characterized by three SH3 domains at their C-termini and a SoHo domain towards their N-termini, are known to regulate cell adhesion, cytoskeletal organization, and growth factor signaling. Here we present the isolation and ovarian expression of the BmCAP gene which encodes CAP/ArgBP2/vinexin family proteins in the silkmoth, Bombyx mori. Screening for full-length cDNA clones identified three mRNA isoforms, BmCAP-A1, BmCAP-A2 and BmCAP-B, which show expression throughout ovarian follicular development. Using an antibody raised against a unique region between the SoHo and SH3 domains, BmCAP-A protein isoforms were identified that show specific expression in different compartments of the ovarian follicles. Immunofluorescence staining of the cells of the follicular epithelium establishes a dynamic pattern of BmCAP-A protein localization during choriogenesis. During early choriogenesis, BmCAP-A has a diffuse localization in the cytoplasm but could also be found concentrated at the apical and basal sides at the cell-cell junctions. During late choriogenesis, the diffuse cytoplasmic staining of BmCAP-A disappears while the staining pattern at the apical side resembles a blueprint for the eggshell surface structure. We suggest that BmCAP-A isoforms have important functions during ovarian development, which involve not only the traditional roles in actin organization or cell-cell adhesion but also the regulation of secretion of chorion proteins and the sculpting of the chorion surface.
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Affiliation(s)
- Theodoros Georgomanolis
- Insect Molecular Genetics and Biotechnology, Institute of Biology, National Centre for Scientific Research Demokritos, Aghia Paraskevi Attikis, Athens, Greece
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Fernow I, Tomasovic A, Siehoff-Icking A, Tikkanen R. Cbl-associated protein is tyrosine phosphorylated by c-Abl and c-Src kinases. BMC Cell Biol 2009; 10:80. [PMID: 19891780 PMCID: PMC2777869 DOI: 10.1186/1471-2121-10-80] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Accepted: 11/05/2009] [Indexed: 01/07/2023] Open
Abstract
Background The c-Cbl-associated protein (CAP), also known as ponsin, localizes to focal adhesions and stress fibers and is involved in signaling events. Phosphorylation has been described for the other two members of the sorbin homology family, vinexin and ArgBP2, but no data exist about the putative phosphorylation of CAP. According to previous findings, CAP binds to tyrosine kinase c-Abl. However, it is not known if CAP is a substrate of c-Abl or other tyrosine kinases or if phosphorylation regulates its localization. Results We here show that CAP is Tyr phosphorylated by and interacts with both c-Abl and c-Src. One major phosphorylation site, Tyr360, and two minor contributors Tyr326 and Tyr632 were identified as Abl phosphorylation sites, whereas Src preferentially phosphorylates Tyr326 and Tyr360. Phosphorylation of CAP was not necessary for its localization to focal adhesions and stress fibers, but Tyr326Phe substitution alters the function of CAP during cell spreading. Conclusion This is the first demonstration of phosphorylation of CAP by any kinase. Our findings suggest that coordinated action of Src and Abl might regulate the function of CAP and reveal a functional role especially for the Src-mediated Tyr phosphorylation of CAP in cell spreading.
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Affiliation(s)
- Inga Fernow
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany.
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Roignot J, Taïeb D, Suliman M, Dusetti NJ, Iovanna JL, Soubeyran P. CIP4 is a new ArgBP2 interacting protein that modulates the ArgBP2 mediated control of WAVE1 phosphorylation and cancer cell migration. Cancer Lett 2009; 288:116-23. [PMID: 19631450 DOI: 10.1016/j.canlet.2009.06.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Revised: 06/24/2009] [Accepted: 06/25/2009] [Indexed: 01/23/2023]
Abstract
ArgBP2 is a multi-adapter protein involved in signal transduction associated to the cytoskeleton and was shown to regulate the migration and adhesion of pancreatic cancer cells thereby modulating their tumorigenicity. Here we describe the interaction of ArgBP2 with CIP4, a new associated protein identified by yeast two-hybrid. We found that both proteins modulated their reciprocal tyrosine phosphorylation catalyzed by the non-receptor tyrosine kinase c-Abl. We observed that, like ArgBP2, CIP4 directly interacted with WAVE1 and could enhance its phosphorylation by c-Abl. ArgBP2 and CIP4 acted synergistically to increase WAVE1 tyrosine phosphorylation. Finally, we could show that CIP4 was dispensable for the ArgBP2 induced blockade of cell migration whereas its overexpression was deleterious for this important function of ArgBP2.
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Affiliation(s)
- J Roignot
- INSERM, U.624, Parc Scientifique de Luminy, Marseille, France
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Maurin ML, Labrune P, Brisset S, Le Lorc'h M, Pineau D, Castel C, Romana S, Tachdjian G. Molecular cytogenetic characterization of a 4p15.1-pter duplication and a 4q35.1-qter deletion in a recombinant of chromosome 4 pericentric inversion. Am J Med Genet A 2009; 149A:226-31. [PMID: 19161154 DOI: 10.1002/ajmg.a.32603] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
To date, 10 cases of recombinant of chromosome 4 pericentric inversion involving sub-bands p14p15 and q35 have been described. We report on the first case analyzed using array-CGH in a female infant presenting psychomotor and growth retardation, facial anomalies, axial hypotonia, short neck, wide spaced nipples and cardiac defects. Conventional karyotype associated to FISH revealed a recombinant chromosome 4 with partial 4p duplication and 4q deletion derived from a paternal pericentric inversion. Array-CGH allowed us to precise rec4 breakpoints: the proposita carried a small 4.82-4.97 Mb 4q35.1 terminal deletion and a large 35.3-36.7 Mb 4p15.1 terminal duplication. Duplications of the distal 2/3 of short arm of chromosome 4 give rise to recognizable craniofacial features but no specific visceral malformation. A contrario small terminal 4q deletions are associated with cardiac defects. This case and review of literature suggest that two genes ArgBP2 and PDLIM3, located at 4q35.1 and both involved in cardiac and muscle development, could be responsible for cardiac defects observed in terminal 4q35.1 deletions.
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Affiliation(s)
- M-L Maurin
- Service d'Histologie Embryologie Cytogénétique, INSERM U782, Université Paris Sud, Hôpital Antoine Béclère, APHP, Clamart, France.
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