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Ewald JD, Zhou G, Lu Y, Kolic J, Ellis C, Johnson JD, Macdonald PE, Xia J. Web-based multi-omics integration using the Analyst software suite. Nat Protoc 2024; 19:1467-1497. [PMID: 38355833 DOI: 10.1038/s41596-023-00950-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 11/21/2023] [Indexed: 02/16/2024]
Abstract
The growing number of multi-omics studies demands clear conceptual workflows coupled with easy-to-use software tools to facilitate data analysis and interpretation. This protocol covers three key components involved in multi-omics analysis, including single-omics data analysis, knowledge-driven integration using biological networks and data-driven integration through joint dimensionality reduction. Using the dataset from a recent multi-omics study of human pancreatic islet tissue and plasma samples, the first section introduces how to perform transcriptomics/proteomics data analysis using ExpressAnalyst and lipidomics data analysis using MetaboAnalyst. On the basis of significant features detected in these workflows, the second section demonstrates how to perform knowledge-driven integration using OmicsNet. The last section illustrates how to perform data-driven integration from the normalized omics data and metadata using OmicsAnalyst. The complete protocol can be executed in ~2 h. Compared with other available options for multi-omics integration, the Analyst software suite described in this protocol enables researchers to perform a wide range of omics data analysis tasks via a user-friendly web interface.
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Affiliation(s)
- Jessica D Ewald
- Institute of Parasitology, McGill University, Montreal, Quebec, Canada
| | - Guangyan Zhou
- Institute of Parasitology, McGill University, Montreal, Quebec, Canada
| | - Yao Lu
- Department of Microbiology and Immunology, McGill University, Montreal, Quebec, Canada
| | - Jelena Kolic
- Life Sciences Institute, Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Cara Ellis
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
| | - James D Johnson
- Life Sciences Institute, Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Patrick E Macdonald
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
| | - Jianguo Xia
- Institute of Parasitology, McGill University, Montreal, Quebec, Canada.
- Department of Microbiology and Immunology, McGill University, Montreal, Quebec, Canada.
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2
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Lechuga S, Marino-Melendez A, Naydenov NG, Zafar A, Braga-Neto MB, Ivanov AI. Regulation of Epithelial and Endothelial Barriers by Molecular Chaperones. Cells 2024; 13:370. [PMID: 38474334 PMCID: PMC10931179 DOI: 10.3390/cells13050370] [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: 01/05/2024] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 03/14/2024] Open
Abstract
The integrity and permeability of epithelial and endothelial barriers depend on the formation of tight junctions, adherens junctions, and a junction-associated cytoskeleton. The establishment of this junction-cytoskeletal module relies on the correct folding and oligomerization of its protein components. Molecular chaperones are known regulators of protein folding and complex formation in different cellular compartments. Mammalian cells possess an elaborate chaperone network consisting of several hundred chaperones and co-chaperones. Only a small part of this network has been linked, however, to the regulation of intercellular adhesions, and the systematic analysis of chaperone functions at epithelial and endothelial barriers is lacking. This review describes the functions and mechanisms of the chaperone-assisted regulation of intercellular junctions. The major focus of this review is on heat shock protein chaperones, their co-chaperones, and chaperonins since these molecules are the focus of the majority of the articles published on the chaperone-mediated control of tissue barriers. This review discusses the roles of chaperones in the regulation of the steady-state integrity of epithelial and vascular barriers as well as the disruption of these barriers by pathogenic factors and extracellular stressors. Since cytoskeletal coupling is essential for junctional integrity and remodeling, chaperone-assisted assembly of the actomyosin cytoskeleton is also discussed.
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Affiliation(s)
- Susana Lechuga
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (S.L.); (A.M.-M.); (N.G.N.); (A.Z.); (M.B.B.-N.)
| | - Armando Marino-Melendez
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (S.L.); (A.M.-M.); (N.G.N.); (A.Z.); (M.B.B.-N.)
| | - Nayden G. Naydenov
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (S.L.); (A.M.-M.); (N.G.N.); (A.Z.); (M.B.B.-N.)
| | - Atif Zafar
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (S.L.); (A.M.-M.); (N.G.N.); (A.Z.); (M.B.B.-N.)
| | - Manuel B. Braga-Neto
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (S.L.); (A.M.-M.); (N.G.N.); (A.Z.); (M.B.B.-N.)
- Department of Gastroenterology, Hepatology and Nutrition, Digestive Disease Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Andrei I. Ivanov
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (S.L.); (A.M.-M.); (N.G.N.); (A.Z.); (M.B.B.-N.)
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Yang Y, Ma S, Ye Z, Zheng Y, Zheng Z, Liu X, Zhou X. Oncogenic DNA methyltransferase 1 activates the PI3K/AKT/mTOR signalling by blocking the binding of HSPB8 and BAG3 in melanoma. Epigenetics 2023; 18:2239607. [PMID: 37523636 PMCID: PMC10392740 DOI: 10.1080/15592294.2023.2239607] [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: 07/22/2022] [Revised: 02/27/2023] [Accepted: 04/07/2023] [Indexed: 08/02/2023] Open
Abstract
Abnormal DNA methylation has been observed in multiple malignancies, including melanoma. In this study, we initially noticed the overexpression of DNA methyltransferase 1 (DNMT1) in melanoma samples in bioinformatics analysis and, subsequently, validated it in the purchased melanoma cell lines. After treatment with short-hairpin RNAs or Decitabine (a DNA methylation inhibitor), silencing of DNMT1 was demonstrated to suppress cell viability and invasive and migratory potentials as well as to augment apoptosis and autophagy in melanoma cells. To further explore the downstream mechanisms, we revealed that DNMT1 inhibited HSPB8 expression through augmenting HSPB8 methylation, thereby suppressing the binding between HSPB8 and BAG3. Then, we elucidated through a series of gain- and loss- of function assays that the interplay of HSPB8 and BAG3 blocked the PI3K/AKT/mTOR pathway, thereby repressing the malignant phenotypes of melanoma cells and contributing to melanoma cell apoptosis and autophagy. We further established a mouse model of melanoma and substantiated that DNMT1 enhanced the in vivo tumorigenesis of melanoma cells via activation of the PI3K/AKT/mTOR pathway through repressing the binding between HSPB8 and BAG3. Taken together, our data supported that DNMT1 repressed the binding between HSPB8 and BAG3 and activated the PI3K/AKT/mTOR pathway, thus playing a tumour-promoting role in melanoma.
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Affiliation(s)
- Yemei Yang
- Department of Dermatology and Venerology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, P. R. China
| | - Shengfang Ma
- Department of Dermatology, Baoshihua Hospital of Gansu Province, Lanzhou, P. R. China
| | - Zi Ye
- College of Information and Sciences, The Pennsylvania State University, University of Pennsylvania, Philadelphia, USA
| | - Yushi Zheng
- Department of Dermatology and Venerology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, P. R. China
| | - Zhenjiong Zheng
- Department of Dermatology and Venerology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, P. R. China
| | - Xiongshan Liu
- Department of Dermatology and Venerology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, P. R. China
| | - Xianyi Zhou
- Department of Dermatology and Venerology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, P. R. China
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Zhou F, Li F, Hou Y, Yang B. HSPB8-Mediated Actin Filament Reorganization by Promoting Autophagic Flux Confers Resilience to Blood-Brain Barrier (BBB) Injury in an In Vitro Model of Ischemic Stroke. ACS Chem Neurosci 2023; 14:2868-2875. [PMID: 37522952 DOI: 10.1021/acschemneuro.3c00194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023] Open
Abstract
Recently, uncontrolled actin polymerization has been recognized as an initiator of early-onset blood-brain barrier (BBB) rupture. Here, using in vitro models, we found that after oxygen-glucose deprivation/reperfusion (OGD/R), endothelial overexpression of HSPB8 suppressed aberrant actin polymerization and thus preserved the integrity of BBB. We further investigated the mechanisms of HSPB8 in the control of actin assembly. HSPB8 suppressed the RhoA/ROCK2/p-MLC signaling pathway in bEnd.3 cells and the RhoA activator abrogated the inhibitory action of HSPB8 on actin reorganization after OGD/R. In addition, endothelial autophagic flux was impaired after OGD/R. This effect was attenuated by HSPB8 overexpression. Autophagy inhibition partially reversed the effect of HSPB8 on the RhoA/ROCK2/p-MLC pathway. Taken together, the present study revealed that the restoration of autophagic flux by overexpressing HSPB8, via the inhibition of the RhoA/ROCK2/p-MLC signaling pathway, reverses the aggregation of endothelial cytoskeleton actin, eventually alleviating OGD/R-induced BBB injury.
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Affiliation(s)
- Fangfang Zhou
- Department of Neurology, 2nd Xiangya Hospital, Central South University, Changsha 410011, Hunan, China
| | - Fei Li
- Department of Neurology, Second Affiliated Hospital of Naval Medical University, Shanghai 200003, China
| | - Ying Hou
- Department of Neurology, 2nd Xiangya Hospital, Central South University, Changsha 410011, Hunan, China
| | - Binbin Yang
- Department of Neurology, 2nd Xiangya Hospital, Central South University, Changsha 410011, Hunan, China
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Tedesco B, Vendredy L, Timmerman V, Poletti A. The chaperone-assisted selective autophagy complex dynamics and dysfunctions. Autophagy 2023:1-23. [PMID: 36594740 DOI: 10.1080/15548627.2022.2160564] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Each protein must be synthesized with the correct amino acid sequence, folded into its native structure, and transported to a relevant subcellular location and protein complex. If any of these steps fail, the cell has the capacity to break down aberrant proteins to maintain protein homeostasis (also called proteostasis). All cells possess a set of well-characterized protein quality control systems to minimize protein misfolding and the damage it might cause. Autophagy, a conserved pathway for the degradation of long-lived proteins, aggregates, and damaged organelles, was initially characterized as a bulk degradation pathway. However, it is now clear that autophagy also contributes to intracellular homeostasis by selectively degrading cargo material. One of the pathways involved in the selective removal of damaged and misfolded proteins is chaperone-assisted selective autophagy (CASA). The CASA complex is composed of three main proteins (HSPA, HSPB8 and BAG3), essential to maintain protein homeostasis in muscle and neuronal cells. A failure in the CASA complex, caused by mutations in the respective coding genes, can lead to (cardio)myopathies and neurodegenerative diseases. Here, we summarize our current understanding of the CASA complex and its dynamics. We also briefly discuss how CASA complex proteins are involved in disease and may represent an interesting therapeutic target.Abbreviation ALP: autophagy lysosomal pathway; ALS: amyotrophic lateral sclerosis; AMOTL1: angiomotin like 1; ARP2/3: actin related protein 2/3; BAG: BAG cochaperone; BAG3: BAG cochaperone 3; CASA: chaperone-assisted selective autophagy; CMA: chaperone-mediated autophagy; DNAJ/HSP40: DnaJ heat shock protein family (Hsp40); DRiPs: defective ribosomal products; EIF2A/eIF2α: eukaryotic translation initiation factor 2A; EIF2AK1/HRI: eukaryotic translation initiation factor 2 alpha kinase 1; GABARAP: GABA type A receptor-associated protein; HDAC6: histone deacetylase 6; HSP: heat shock protein; HSPA/HSP70: heat shock protein family A (Hsp70); HSP90: heat shock protein 90; HSPB8: heat shock protein family B (small) member 8; IPV: isoleucine-proline-valine; ISR: integrated stress response; KEAP1: kelch like ECH associated protein 1; LAMP2A: lysosomal associated membrane protein 2A; LATS1: large tumor suppressor kinase 1; LIR: LC3-interacting region; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; MTOC: microtubule organizing center; MTOR: mechanistic target of rapamycin kinase; NFKB/NF-κB: nuclear factor kappa B; NFE2L2: NFE2 like bZIP transcription factor 2; PLCG/PLCγ: phospholipase C gamma; polyQ: polyglutamine; PQC: protein quality control; PxxP: proline-rich; RAN translation: repeat-associated non-AUG translation; SG: stress granule; SOD1: superoxide dismutase 1; SQSTM1/p62: sequestosome 1; STUB1/CHIP: STIP1 homology and U-box containing protein 1; STK: serine/threonine kinase; SYNPO: synaptopodin; TBP: TATA-box binding protein; TARDBP/TDP-43: TAR DNA binding protein; TFEB: transcription factor EB; TPR: tetratricopeptide repeats; TSC1: TSC complex subunit 1; UBA: ubiquitin associated; UPS: ubiquitin-proteasome system; WW: tryptophan-tryptophan; WWTR1: WW domain containing transcription regulator 1; YAP1: Yes1 associated transcriptional regulator.
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Affiliation(s)
- Barbara Tedesco
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari, Dipartimento di Eccellenza 2018-2027, Università degli studi di Milano, Milan, Italy.,Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Leen Vendredy
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
| | - Vincent Timmerman
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
| | - Angelo Poletti
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari, Dipartimento di Eccellenza 2018-2027, Università degli studi di Milano, Milan, Italy
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Chierichetti M, Cerretani M, Ciammaichella A, Crippa V, Rusmini P, Ferrari V, Tedesco B, Casarotto E, Cozzi M, Mina F, Pramaggiore P, Galbiati M, Piccolella M, Bresciani A, Cristofani R, Poletti A. Identification of HSPB8 modulators counteracting misfolded protein accumulation in neurodegenerative diseases. Life Sci 2022; 322:121323. [PMID: 36574942 DOI: 10.1016/j.lfs.2022.121323] [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: 08/01/2022] [Revised: 12/17/2022] [Accepted: 12/20/2022] [Indexed: 12/25/2022]
Abstract
AIMS The small Heat Shock Protein B8 (HSPB8) is the core component of the chaperone-assisted selective autophagy (CASA) complex. This complex selectively targets, transports, and tags misfolded proteins for their recognition by autophagic receptors and insertion into autophagosome for clearance. CASA is essential to maintain intracellular proteostasis, especially in heart, muscle, and brain often exposed to various types of cell stresses. In neurons, HSPB8 protects against neurotoxicity caused by misfolded proteins in several models of neurodegenerative diseases; by facilitating autophagy, HSPB8 assists misfolded protein degradation also counteracting proteasome overwhelming and inhibition. MATERIALS AND METHODS To enhance HSPB8 protective activity, we screened a library of approximately 120,000 small molecules to identify compounds capable of increasing HSPB8 gene transcription, translation, or protein stability. We found 83 compounds active in preliminary dose-response assays and further classified them in 19 chemical classes by medicinal chemists' visual inspection. Of these 19 prototypes, 14 induced HSPB8 mRNA and protein levels in SH-SY5Y cells. KEY FINDINGS Out of these 14, 3 successfully reduced the aggregation propensity of a disease-associated mutant misfolded Superoxide Dismutase 1 (SOD1) protein in a flow cytometry-based "aggregation assay" [Flow cytometric analysis of Inclusions and Trafficking" (FloIT)] and induced the expression (mRNA and protein) of some autophagy receptors. Notably, the 3 hits were inactive in HSPB8-depleted cells, confirming that their protective activity is mediated by and requires HSPB8. SIGNIFICANCE Thus, these compounds may be highly relevant for a therapeutic approach in several human disorders, including neurodegenerative diseases, in which enhancement of CASA exerts beneficial activities.
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Affiliation(s)
- Marta Chierichetti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Mauro Cerretani
- Department of Translational and Discovery Research, IRBM S.p.A., Via Pontina Km 30,600, 00071 Pomezia, Roma, Italy
| | - Alina Ciammaichella
- Department of Drug Discovery, IRBM S.p.A., Via Pontina Km 30,600, 00071 Pomezia, Roma, Italy
| | - Valeria Crippa
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Paola Rusmini
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Veronica Ferrari
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Barbara Tedesco
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy; Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Elena Casarotto
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Marta Cozzi
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Francesco Mina
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Paola Pramaggiore
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Mariarita Galbiati
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Margherita Piccolella
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - Alberto Bresciani
- Department of Translational and Discovery Research, IRBM S.p.A., Via Pontina Km 30,600, 00071 Pomezia, Roma, Italy
| | - Riccardo Cristofani
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy.
| | - Angelo Poletti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy.
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Lei T, Xiao Z, Bi W, Cai S, Yang Y, Du H. Targeting small heat shock proteins to degrade aggregates as a potential strategy in neurodegenerative diseases. Ageing Res Rev 2022; 82:101769. [PMID: 36283618 DOI: 10.1016/j.arr.2022.101769] [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: 03/30/2022] [Revised: 10/18/2022] [Accepted: 10/21/2022] [Indexed: 01/31/2023]
Abstract
Neurodegenerative diseases (NDs) are aging-related diseases that involve the death of neurons in the brain. Dysregulation of protein homeostasis leads to the production of toxic proteins or the formation of aggregates, which is the pathological basis of NDs. Small heat shock proteins (HSPB) is involved in the establishment of a protein quality control (PQC) system to maintain cellular homeostasis. HSPB can be secreted into the extracellular space and delivered by various routes, especially extracellular vehicles (EVs). HSPB plays an important role in influencing the aggregation phase of toxic proteins involved in heat shock transcription factor (HSF) regulation, oxidative stress, autophagy and apoptosis pathways. HSPB conferred neuroprotective effects by resisting toxic protein aggregation, reducing autophagy and reducing neuronal apoptosis. The HSPB treatment strategies, including targeted PQC system therapy and delivery of EVs-HSPB, can improve disease manifestations for NDs. This review aims to provide a comprehensive insight into the impact of HSPB in NDs and the feasibility of new technology to enhance HSPB expression and EVs-HSPB delivery for neurodegenerative disease.
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Affiliation(s)
- Tong Lei
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China; Daxing Research Institute, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhuangzhuang Xiao
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China; Daxing Research Institute, University of Science and Technology Beijing, Beijing 100083, China
| | - Wangyu Bi
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China; Daxing Research Institute, University of Science and Technology Beijing, Beijing 100083, China
| | - Shanglin Cai
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China; Daxing Research Institute, University of Science and Technology Beijing, Beijing 100083, China
| | - Yanjie Yang
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China; Daxing Research Institute, University of Science and Technology Beijing, Beijing 100083, China
| | - Hongwu Du
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China; Daxing Research Institute, University of Science and Technology Beijing, Beijing 100083, China.
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The Role of Small Heat Shock Proteins in Protein Misfolding Associated Motoneuron Diseases. Int J Mol Sci 2022; 23:ijms231911759. [PMID: 36233058 PMCID: PMC9569637 DOI: 10.3390/ijms231911759] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 11/17/2022] Open
Abstract
Motoneuron diseases (MNDs) are neurodegenerative conditions associated with death of upper and/or lower motoneurons (MNs). Proteostasis alteration is a pathogenic mechanism involved in many MNDs and is due to the excessive presence of misfolded and aggregated proteins. Protein misfolding may be the product of gene mutations, or due to defects in the translation process, or to stress agents; all these conditions may alter the native conformation of proteins making them prone to aggregate. Alternatively, mutations in members of the protein quality control (PQC) system may determine a loss of function of the proteostasis network. This causes an impairment in the capability to handle and remove aberrant or damaged proteins. The PQC system consists of the degradative pathways, which are the autophagy and the proteasome, and a network of chaperones and co-chaperones. Among these components, Heat Shock Protein 70 represents the main factor in substrate triage to folding, refolding, or degradation, and it is assisted in this task by a subclass of the chaperone network, the small heat shock protein (sHSPs/HSPBs) family. HSPBs take part in proteostasis by bridging misfolded and aggregated proteins to the HSP70 machinery and to the degradative pathways, facilitating refolding or clearance of the potentially toxic proteins. Because of its activity against proteostasis alteration, the chaperone system plays a relevant role in the protection against proteotoxicity in MNDs. Here, we discuss the role of HSPBs in MNDs and which HSPBs may represent a valid target for therapeutic purposes.
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9
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Muranova LK, Shatov VM, Gusev NB. Role of Small Heat Shock Proteins in the Remodeling of Actin Microfilaments. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:800-811. [PMID: 36171660 DOI: 10.1134/s0006297922080119] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/28/2022] [Accepted: 04/28/2022] [Indexed: 06/16/2023]
Abstract
Small heat shock proteins (sHsps) play an important role in the maintenance of proteome stability and, particularly, in stabilization of the cytoskeleton and cell contractile apparatus. Cell exposure to different types of stress is accompanied by the translocation of sHsps onto actin filaments; therefore, it is commonly believed that the sHsps are true actin-binding proteins. Investigations of last years have shown that this assumption is incorrect. Stress-induced translocation of sHsp to actin filaments is not the result of direct interaction of these proteins with intact actin, but results from the chaperone-like activity of sHsps and their interaction with various actin-binding proteins. HspB1 and HspB5 interact with giant elastic proteins titin and filamin thus providing an integrity of the contractile apparatus and its proper localization in the cell. HspB6 binds to the universal adapter protein 14-3-3 and only indirectly affects the structure of actin filament. HspB7 interacts with filamin C and controls actin filament assembly. HspB8 forms tight complex with the universal regulatory and adapter protein Bag3 and participates in the chaperone-assisted selective autophagy (CASA) of actin-binding proteins (e.g., filamin), as well as in the actin-depending processes taking place in mitoses. Hence, the mechanisms of sHsp participation in the maintenance of the contractile apparatus and cytoskeleton are much more complicated and diverse than it has been postulated earlier and are not limited to direct interactions of sHsps with actin. The old hypothesis on the direct binding of sHsps to intact actin should be revised and further detailed investigation on the sHsp interaction with minor proteins participating in the formation and remodeling of actin filaments is required.
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Affiliation(s)
- Lydia K Muranova
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Vladislav M Shatov
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Nikolai B Gusev
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia.
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10
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Tedesco B, Cristofani R, Ferrari V, Cozzi M, Rusmini P, Casarotto E, Chierichetti M, Mina F, Galbiati M, Piccolella M, Crippa V, Poletti A. Insights on Human Small Heat Shock Proteins and Their Alterations in Diseases. Front Mol Biosci 2022; 9:842149. [PMID: 35281256 PMCID: PMC8913478 DOI: 10.3389/fmolb.2022.842149] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 01/19/2022] [Indexed: 11/13/2022] Open
Abstract
The family of the human small Heat Shock Proteins (HSPBs) consists of ten members of chaperones (HSPB1-HSPB10), characterized by a low molecular weight and capable of dimerization and oligomerization forming large homo- or hetero-complexes. All HSPBs possess a highly conserved centrally located α-crystallin domain and poorly conserved N- and C-terminal domains. The main feature of HSPBs is to exert cytoprotective functions by preserving proteostasis, assuring the structural maintenance of the cytoskeleton and acting in response to cellular stresses and apoptosis. HSPBs take part in cell homeostasis by acting as holdases, which is the ability to interact with a substrate preventing its aggregation. In addition, HSPBs cooperate in substrates refolding driven by other chaperones or, alternatively, promote substrate routing to degradation. Notably, while some HSPBs are ubiquitously expressed, others show peculiar tissue-specific expression. Cardiac muscle, skeletal muscle and neurons show high expression levels for a wide variety of HSPBs. Indeed, most of the mutations identified in HSPBs are associated to cardiomyopathies, myopathies, and motor neuropathies. Instead, mutations in HSPB4 and HSPB5, which are also expressed in lens, have been associated with cataract. Mutations of HSPBs family members encompass base substitutions, insertions, and deletions, resulting in single amino acid substitutions or in the generation of truncated or elongated proteins. This review will provide an updated overview of disease-related mutations in HSPBs focusing on the structural and biochemical effects of mutations and their functional consequences.
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Affiliation(s)
- B. Tedesco
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
- Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - R. Cristofani
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - V. Ferrari
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - M. Cozzi
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - P. Rusmini
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - E. Casarotto
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - M. Chierichetti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - F. Mina
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - M. Galbiati
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - M. Piccolella
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - V. Crippa
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
| | - A. Poletti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, Italy
- *Correspondence: A. Poletti,
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11
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Metabolic changes of Issatchenkia orientalis under acetic acid stress by transcriptome profile using RNA-sequencing. Int Microbiol 2021; 25:417-426. [PMID: 34811604 DOI: 10.1007/s10123-021-00217-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/21/2021] [Accepted: 10/18/2021] [Indexed: 10/19/2022]
Abstract
Issatchenkia orientalis (I. orientalis) is tolerant to various environmental stresses especially acetic acid stress in wine making. However, limited literature is available on the transcriptome profile of I. orientalis under acetic acid stress. RNA-sequence was used to investigate the metabolic changes due to underlying I. orientalis 166 (Io 166) tolerant to acetic acid. Transcriptomic analyses showed that genes involved in ergosterol biosynthesis are differentially expressed under acetic acid stress. Genes associated with ribosome function were downregulated, while energy metabolism-related genes were upregulated. Moreover, Hsp70/Hsp90 and related molecular chaperones were upregulated to recognize and degrade misfolded proteins. Compared to Saccharomyces cerevisiae, transcriptomic changes of Io 166 showed many similarities under acetic acid stress. There were significant upregulation of genes in ergosterol biosynthesis and for the application of wine production.
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12
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Luthold C, Lambert H, Guilbert SM, Rodrigue MA, Fuchs M, Varlet AA, Fradet-Turcotte A, Lavoie JN. CDK1-Mediated Phosphorylation of BAG3 Promotes Mitotic Cell Shape Remodeling and the Molecular Assembly of Mitotic p62 Bodies. Cells 2021; 10:cells10102638. [PMID: 34685619 PMCID: PMC8534064 DOI: 10.3390/cells10102638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 09/22/2021] [Accepted: 09/27/2021] [Indexed: 01/07/2023] Open
Abstract
The cochaperone BCL2-associated athanogene 3 (BAG3), in complex with the heat shock protein HSPB8, facilitates mitotic rounding, spindle orientation, and proper abscission of daughter cells. BAG3 and HSPB8 mitotic functions implicate the sequestosome p62/SQSTM1, suggesting a role for protein quality control. However, the interplay between this chaperone-assisted pathway and the mitotic machinery is not known. Here, we show that BAG3 phosphorylation at the conserved T285 is regulated by CDK1 and activates its function in mitotic cell shape remodeling. BAG3 phosphorylation exhibited a high dynamic at mitotic entry and both a non-phosphorylatable BAG3T285A and a phosphomimetic BAG3T285D protein were unable to correct the mitotic defects in BAG3-depleted HeLa cells. We also demonstrate that BAG3 phosphorylation, HSPB8, and CDK1 activity modulate the molecular assembly of p62/SQSTM1 into mitotic bodies containing K63 polyubiquitinated chains. These findings suggest the existence of a mitotically regulated spatial quality control mechanism for the fidelity of cell shape remodeling in highly dividing cells.
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Affiliation(s)
- Carole Luthold
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Herman Lambert
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Solenn M. Guilbert
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Marc-Antoine Rodrigue
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Margit Fuchs
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Alice-Anaïs Varlet
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Amélie Fradet-Turcotte
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Faculté de Médecine, Université Laval, Quebec, QC G1V0A6, Canada
| | - Josée N. Lavoie
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Faculté de Médecine, Université Laval, Quebec, QC G1V0A6, Canada
- Correspondence:
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13
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Günay KA, Silver JS, Chang TL, Bednarski OJ, Bannister KL, Rogowski CJ, Olwin BB, Anseth KS. Myoblast mechanotransduction and myotube morphology is dependent on BAG3 regulation of YAP and TAZ. Biomaterials 2021; 277:121097. [PMID: 34481290 DOI: 10.1016/j.biomaterials.2021.121097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/26/2021] [Accepted: 08/24/2021] [Indexed: 11/30/2022]
Abstract
Skeletal muscle tissue is mechanically dynamic with changes in stiffness influencing function, maintenance, and regeneration. We modeled skeletal muscle mechanical changes in culture with dynamically stiffening hydrogels demonstrating that the chaperone protein BAG3 transduces matrix stiffness by redistributing YAP and TAZ subcellular localization in muscle progenitor cells. BAG3 depletion increases cytoplasmic retention of YAP and TAZ, desensitizing myoblasts to changes in hydrogel elastic moduli. Upon differentiation, muscle progenitors depleted of BAG3 formed enlarged, round myotubes lacking the typical cylindrical morphology. The aberrant morphology is dependent on YAP/TAZ signaling, which was sequestered in the cytoplasm in BAG3-depleted myotubes but predominately nuclear in cylindrical myotubes of control cells. Control progenitor cells induced to differentiate on soft (E' = 4 and 12 kPa) hydrogels formed circular myotubes similar to those observed in BAG3-depleted cells. Inhibition of the Hippo pathway partially restored myotube morphologies, permitting nuclear translocation of YAP and TAZ in BAG3-depleted myogenic progenitors. Thus, BAG3 is a critical mediator of dynamic stiffness changes in muscle tissue, coupling mechanical alterations to intracellular signals and inducing changes in gene expression that influence muscle progenitor cell morphology and differentiation.
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Affiliation(s)
- K Arda Günay
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO, USA; BioFrontiers Institute, University of Colorado, Boulder, CO, USA
| | - Jason S Silver
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO, USA; BioFrontiers Institute, University of Colorado, Boulder, CO, USA; Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO, USA; Medical Scientist Training Program, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Tze-Ling Chang
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO, USA; BioFrontiers Institute, University of Colorado, Boulder, CO, USA
| | - Olivia J Bednarski
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO, USA; BioFrontiers Institute, University of Colorado, Boulder, CO, USA
| | - Kendra L Bannister
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO, USA; BioFrontiers Institute, University of Colorado, Boulder, CO, USA
| | - Cameron J Rogowski
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO, USA; BioFrontiers Institute, University of Colorado, Boulder, CO, USA
| | - Bradley B Olwin
- BioFrontiers Institute, University of Colorado, Boulder, CO, USA; Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO, USA.
| | - Kristi S Anseth
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO, USA; BioFrontiers Institute, University of Colorado, Boulder, CO, USA.
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14
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Höhfeld J, Benzing T, Bloch W, Fürst DO, Gehlert S, Hesse M, Hoffmann B, Hoppe T, Huesgen PF, Köhn M, Kolanus W, Merkel R, Niessen CM, Pokrzywa W, Rinschen MM, Wachten D, Warscheid B. Maintaining proteostasis under mechanical stress. EMBO Rep 2021; 22:e52507. [PMID: 34309183 PMCID: PMC8339670 DOI: 10.15252/embr.202152507] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 06/28/2021] [Accepted: 07/01/2021] [Indexed: 12/11/2022] Open
Abstract
Cell survival, tissue integrity and organismal health depend on the ability to maintain functional protein networks even under conditions that threaten protein integrity. Protection against such stress conditions involves the adaptation of folding and degradation machineries, which help to preserve the protein network by facilitating the refolding or disposal of damaged proteins. In multicellular organisms, cells are permanently exposed to stress resulting from mechanical forces. Yet, for long time mechanical stress was not recognized as a primary stressor that perturbs protein structure and threatens proteome integrity. The identification and characterization of protein folding and degradation systems, which handle force-unfolded proteins, marks a turning point in this regard. It has become apparent that mechanical stress protection operates during cell differentiation, adhesion and migration and is essential for maintaining tissues such as skeletal muscle, heart and kidney as well as the immune system. Here, we provide an overview of recent advances in our understanding of mechanical stress protection.
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Affiliation(s)
- Jörg Höhfeld
- Institute for Cell BiologyRheinische Friedrich‐Wilhelms University BonnBonnGermany
| | - Thomas Benzing
- Department II of Internal Medicine and Center for Molecular Medicine Cologne (CMMC)University of CologneCologneGermany
| | - Wilhelm Bloch
- Institute of Cardiovascular Research and Sports MedicineGerman Sport UniversityCologneGermany
| | - Dieter O Fürst
- Institute for Cell BiologyRheinische Friedrich‐Wilhelms University BonnBonnGermany
| | - Sebastian Gehlert
- Institute of Cardiovascular Research and Sports MedicineGerman Sport UniversityCologneGermany
- Department for the Biosciences of SportsInstitute of Sports ScienceUniversity of HildesheimHildesheimGermany
| | - Michael Hesse
- Institute of Physiology I, Life & Brain CenterMedical FacultyRheinische Friedrich‐Wilhelms UniversityBonnGermany
| | - Bernd Hoffmann
- Institute of Biological Information Processing, IBI‐2: MechanobiologyForschungszentrum JülichJülichGermany
| | - Thorsten Hoppe
- Institute for GeneticsCologne Excellence Cluster on Cellular Stress Responses in Aging‐Associated Diseases (CECAD) and CMMCUniversity of CologneCologneGermany
| | - Pitter F Huesgen
- Central Institute for Engineering, Electronics and Analytics, ZEA3Forschungszentrum JülichJülichGermany
- CECADUniversity of CologneCologneGermany
| | - Maja Köhn
- Institute of Biology IIIFaculty of Biology, and Signalling Research Centres BIOSS and CIBSSAlbert‐Ludwigs‐University FreiburgFreiburgGermany
| | - Waldemar Kolanus
- LIMES‐InstituteRheinische Friedrich‐Wilhelms University BonnBonnGermany
| | - Rudolf Merkel
- Institute of Biological Information Processing, IBI‐2: MechanobiologyForschungszentrum JülichJülichGermany
| | - Carien M Niessen
- Department of Dermatology and CECADUniversity of CologneCologneGermany
| | | | - Markus M Rinschen
- Department of Biomedicine and Aarhus Institute of Advanced StudiesAarhus UniversityAarhusDenmark
- Department of MedicineUniversity Medical Center Hamburg‐EppendorfHamburgGermany
| | - Dagmar Wachten
- Institute of Innate ImmunityUniversity Hospital BonnBonnGermany
| | - Bettina Warscheid
- Institute of Biology IIFaculty of Biology, and Signalling Research Centres BIOSS and CIBSSAlbert‐Ludwigs‐University FreiburgFreiburgGermany
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15
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Cristofani R, Piccolella M, Crippa V, Tedesco B, Montagnani Marelli M, Poletti A, Moretti RM. The Role of HSPB8, a Component of the Chaperone-Assisted Selective Autophagy Machinery, in Cancer. Cells 2021; 10:335. [PMID: 33562660 PMCID: PMC7915307 DOI: 10.3390/cells10020335] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/27/2021] [Accepted: 02/02/2021] [Indexed: 02/07/2023] Open
Abstract
The cellular response to cancer-induced stress is one of the major aspects regulating cancer development and progression. The Heat Shock Protein B8 (HSPB8) is a small chaperone involved in chaperone-assisted selective autophagy (CASA). CASA promotes the selective degradation of proteins to counteract cell stress such as tumor-induced stress. HSPB8 is also involved in (i) the cell division machinery regulating chromosome segregation and cell cycle arrest in the G0/G1 phase and (ii) inflammation regulating dendritic cell maturation and cytokine production. HSPB8 expression and role are tumor-specific, showing a dual and opposite role. Interestingly, HSPB8 may be involved in the acquisition of chemoresistance to drugs. Despite the fact the mechanisms of HSPB8-mediated CASA activation in tumors need further studies, HSPB8 could represent an important factor in cancer induction and progression and it may be a potential target for anticancer treatment in specific types of cancer. In this review, we will discuss the molecular mechanism underlying HSPB8 roles in normal and cancer conditions. The basic mechanisms involved in anti- and pro-tumoral activities of HSPB8 are deeply discussed together with the pathways that modulate HSPB8 expression, in order to outline molecules with a beneficial effect for cancer cell growth, migration, and death.
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16
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Luthold C, Varlet AA, Lambert H, Bordeleau F, Lavoie JN. Chaperone-Assisted Mitotic Actin Remodeling by BAG3 and HSPB8 Involves the Deacetylase HDAC6 and Its Substrate Cortactin. Int J Mol Sci 2020; 22:ijms22010142. [PMID: 33375626 PMCID: PMC7795263 DOI: 10.3390/ijms22010142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/18/2020] [Accepted: 12/23/2020] [Indexed: 12/17/2022] Open
Abstract
The fidelity of actin dynamics relies on protein quality control, but the underlying molecular mechanisms are poorly defined. During mitosis, the cochaperone BCL2-associated athanogene 3 (BAG3) modulates cell rounding, cortex stability, spindle orientation, and chromosome segregation. Mitotic BAG3 shows enhanced interactions with its preferred chaperone partner HSPB8, the autophagic adaptor p62/SQSTM1, and HDAC6, a deacetylase with cytoskeletal substrates. Here, we show that depletion of BAG3, HSPB8, or p62/SQSTM1 can recapitulate the same inhibition of mitotic cell rounding. Moreover, depletion of either of these proteins also interfered with the dynamic of the subcortical actin cloud that contributes to spindle positioning. These phenotypes were corrected by drugs that limit the Arp2/3 complex or HDAC6 activity, arguing for a role for BAG3 in tuning branched actin network assembly. Mechanistically, we found that cortactin acetylation/deacetylation is mitotically regulated and is correlated with a reduced association of cortactin with HDAC6 in situ. Remarkably, BAG3 depletion hindered the mitotic decrease in cortactin–HDAC6 association. Furthermore, expression of an acetyl-mimic cortactin mutant in BAG3-depleted cells normalized mitotic cell rounding and the subcortical actin cloud organization. Together, these results reinforce a BAG3′s function for accurate mitotic actin remodeling, via tuning cortactin and HDAC6 spatial dynamics.
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Affiliation(s)
- Carole Luthold
- Centre de Recherche sur le Cancer, Université Laval, Québec, QC G1R 3S3, Canada; (C.L.); (A.-A.V.); (H.L.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Québec, QC G1R 3S3, Canada
| | - Alice-Anaïs Varlet
- Centre de Recherche sur le Cancer, Université Laval, Québec, QC G1R 3S3, Canada; (C.L.); (A.-A.V.); (H.L.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Québec, QC G1R 3S3, Canada
| | - Herman Lambert
- Centre de Recherche sur le Cancer, Université Laval, Québec, QC G1R 3S3, Canada; (C.L.); (A.-A.V.); (H.L.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Québec, QC G1R 3S3, Canada
| | - François Bordeleau
- Centre de Recherche sur le Cancer, Université Laval, Québec, QC G1R 3S3, Canada; (C.L.); (A.-A.V.); (H.L.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Québec, QC G1R 3S3, Canada
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
- Correspondence: (F.B.); (J.N.L.)
| | - Josée N. Lavoie
- Centre de Recherche sur le Cancer, Université Laval, Québec, QC G1R 3S3, Canada; (C.L.); (A.-A.V.); (H.L.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Québec, QC G1R 3S3, Canada
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
- Correspondence: (F.B.); (J.N.L.)
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17
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Insulin receptor substrate 1 gene expression is strongly up-regulated by HSPB8 silencing in U87 glioma cells. Endocr Regul 2020; 54:231-243. [PMID: 33885248 DOI: 10.2478/enr-2020-0026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Objective. The aim of the present investigation was to study the expression of genes encoding IRS1 (insulin receptor substrate 1) and some other functionally active proteins in U87 glioma cells under silencing of polyfunctional chaperone HSPB8 for evaluation of the possible significance of this protein in intergenic interactions.Methods. Silencing of HSPB8 mRNA was introduced by HSPB8 specific siRNA. The expression level of HSPB8, IRS1, HK2, GLO1, HOMER3, MYL9, NAMPT, PER2, PERP, GADD45A, and DEK genes was studied in U87 glioma cells by quantitative polymerase chain reaction.Results. It was shown that silencing of HSPB8 mRNA by specific to HSPB8 siRNA led to a strong down-regulation of this mRNA and significant modification of the expression of IRS1 and many other genes in glioma cells: strong up-regulated of HOMER3, GLO1, and PERP and down-regulated of MYL9, NAMPT, PER2, GADD45A, and DEK gene expressions. At the same time, no significant changes were detected in the expression of HK2 gene in glioma cells treated by siRNA, specific to HSPB8. Moreover, the silencing of HSPB8 mRNA enhanced the glioma cells proliferation rate.Conclusions. Results of this investigation demonstrated that silencing of HSPB8 mRNA affected the expression of IRS1 gene as well as many other genes encoding tumor growth related proteins. It is possible that the dysregulation of most of the studied genes in glioma cells after silencing of HSPB8 is reflected by a complex of intergenic interactions and that this polyfunctional chaperone is an important factor for the stability of genome function and regulatory mechanisms contributing to the tumorigenesis control.
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18
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BAG3 Proteomic Signature under Proteostasis Stress. Cells 2020; 9:cells9112416. [PMID: 33158300 PMCID: PMC7694386 DOI: 10.3390/cells9112416] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 10/28/2020] [Accepted: 10/31/2020] [Indexed: 12/13/2022] Open
Abstract
The multifunctional HSP70 co-chaperone BAG3 (BCL-2-associated athanogene 3) represents a key player in the quality control of the cellular proteostasis network. In response to stress, BAG3 specifically targets aggregation-prone proteins to the perinuclear aggresome and promotes their degradation via BAG3-mediated selective macroautophagy. To adapt cellular homeostasis to stress, BAG3 modulates and functions in various cellular processes and signaling pathways. Noteworthy, dysfunction and deregulation of BAG3 and its pathway are pathophysiologically linked to myopathies, cancer, and neurodegenerative disorders. Here, we report a BAG3 proteomic signature under proteostasis stress. To elucidate the dynamic and multifunctional action of BAG3 in response to stress, we established BAG3 interactomes under basal and proteostasis stress conditions by employing affinity purification combined with quantitative mass spectrometry. In addition to the identification of novel potential BAG3 interactors, we defined proteins whose interaction with BAG3 was altered upon stress. By functional annotation and protein-protein interaction enrichment analysis of the identified potential BAG3 interactors, we confirmed the multifunctionality of BAG3 and highlighted its crucial role in diverse cellular signaling pathways and processes, ensuring cellular proteostasis and cell viability. These include protein folding and degradation, gene expression, cytoskeleton dynamics (including cell cycle and transport), as well as granulostasis, in particular.
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Marzullo L, Turco MC, De Marco M. The multiple activities of BAG3 protein: Mechanisms. Biochim Biophys Acta Gen Subj 2020; 1864:129628. [DOI: 10.1016/j.bbagen.2020.129628] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/16/2020] [Accepted: 04/27/2020] [Indexed: 12/18/2022]
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20
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Dubińska-Magiera M, Niedbalska-Tarnowska J, Migocka-Patrzałek M, Posyniak E, Daczewska M. Characterization of Hspb8 in Zebrafish. Cells 2020; 9:cells9061562. [PMID: 32604890 PMCID: PMC7348923 DOI: 10.3390/cells9061562] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/13/2020] [Accepted: 06/24/2020] [Indexed: 11/16/2022] Open
Abstract
Hspb8 is a member of the small heat shock protein (sHSP) family. Its expression is known to be upregulated under heat shock. This protein interacts with different partners and can, therefore, be involved in various processes relevant to tissue integrity and functioning. In humans, mutations in the gene encoding Hspb8 can lead to the development of various diseases such as myopathies and neuropathies. In our study, we aimed to perform an in-depth characterization of zebrafish Hspb8 during zebrafish development. We applied techniques such as RT-qPCR, Western blot, immunofluorescence, co-immunoprecipitation, LC-MS, and morpholino-mediated knockdown. We broadened the knowledge regarding zebrafish hspb8 expression during development under normal and heat shock conditions as well as its tissue- and subcellular-specific localization. A co-IP analysis allowed us to conclude that zebrafish Hspb8 can interact with proteins such as Bag3 and Hsc70, which are crucial for formation of an autophagy-inducing complex. We also demonstrated that hspb8 morpholino-mediated knockdown has an impact on zebrafish embryos' morphology, muscle ultrastructure, and motility behavior. Our research provides a valuable resource for the potential use of the zebrafish as a model for studying pathological conditions associated with hspb8 disorders.
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Affiliation(s)
- Magda Dubińska-Magiera
- Department of Animal Developmental Biology, Faculty of Biological Sciences, University of Wroclaw, Sienkiewicza 21, 50-335 Wroclaw, Poland; (J.N.-T.); (M.M.-P.); (E.P.)
- Correspondence: (M.D.-M.); (M.D.); Tel.: +48-71-375-4024 (M.D.-M.)
| | - Joanna Niedbalska-Tarnowska
- Department of Animal Developmental Biology, Faculty of Biological Sciences, University of Wroclaw, Sienkiewicza 21, 50-335 Wroclaw, Poland; (J.N.-T.); (M.M.-P.); (E.P.)
- Hirszfeld Institute of Immunology and Experimental Therapy, the Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wroclaw, Poland
| | - Marta Migocka-Patrzałek
- Department of Animal Developmental Biology, Faculty of Biological Sciences, University of Wroclaw, Sienkiewicza 21, 50-335 Wroclaw, Poland; (J.N.-T.); (M.M.-P.); (E.P.)
| | - Ewelina Posyniak
- Department of Animal Developmental Biology, Faculty of Biological Sciences, University of Wroclaw, Sienkiewicza 21, 50-335 Wroclaw, Poland; (J.N.-T.); (M.M.-P.); (E.P.)
| | - Małgorzata Daczewska
- Department of Animal Developmental Biology, Faculty of Biological Sciences, University of Wroclaw, Sienkiewicza 21, 50-335 Wroclaw, Poland; (J.N.-T.); (M.M.-P.); (E.P.)
- Correspondence: (M.D.-M.); (M.D.); Tel.: +48-71-375-4024 (M.D.-M.)
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21
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Abstract
The WW domain is a modular protein structure that recognizes the proline-rich Pro-Pro-x-Tyr (PPxY) motif contained in specific target proteins. The compact modular nature of the WW domain makes it ideal for mediating interactions between proteins in complex networks and signaling pathways of the cell (e.g. the Hippo pathway). As a result, WW domains play key roles in a plethora of both normal and disease processes. Intriguingly, RNA and DNA viruses have evolved strategies to hijack cellular WW domain-containing proteins and thereby exploit the modular functions of these host proteins for various steps of the virus life cycle, including entry, replication, and egress. In this review, we summarize key findings in this rapidly expanding field, in which new virus-host interactions continue to be identified. Further unraveling of the molecular aspects of these crucial virus-host interactions will continue to enhance our fundamental understanding of the biology and pathogenesis of these viruses. We anticipate that additional insights into these interactions will help support strategies to develop a new class of small-molecule inhibitors of viral PPxY-host WW-domain interactions that could be used as antiviral therapeutics.
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Affiliation(s)
- Ariel Shepley-McTaggart
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Hao Fan
- Bioinformatics Institute, Agency for Science, Technology, and Research (A*STAR), 30 Biopolis Street, Matrix #07-01, Singapore 138671.,Department of Biological Sciences (DBS), National University of Singapore, Singapore 119077.,Center for Computational Biology, DUKE-NUS Medical School, Singapore 169857
| | - Marius Sudol
- Department of Physiology, National University of Singapore, Singapore 119077.,Laboratory of Cancer Signaling and Domainopathies, Yong Loo Li School of Medicine, Block MD9, 2 Medical Drive #04-01, Singapore 117597.,Mechanobiology Institute, T-Lab, 5A Engineering Drive 1, Singapore 117411.,Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York 10029
| | - Ronald N Harty
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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22
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Neuromuscular Diseases Due to Chaperone Mutations: A Review and Some New Results. Int J Mol Sci 2020; 21:ijms21041409. [PMID: 32093037 PMCID: PMC7073051 DOI: 10.3390/ijms21041409] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 12/12/2022] Open
Abstract
Skeletal muscle and the nervous system depend on efficient protein quality control, and they express chaperones and cochaperones at high levels to maintain protein homeostasis. Mutations in many of these proteins cause neuromuscular diseases, myopathies, and hereditary motor and sensorimotor neuropathies. In this review, we cover mutations in DNAJB6, DNAJB2, αB-crystallin (CRYAB, HSPB5), HSPB1, HSPB3, HSPB8, and BAG3, and discuss the molecular mechanisms by which they cause neuromuscular disease. In addition, previously unpublished results are presented, showing downstream effects of BAG3 p.P209L on DNAJB6 turnover and localization.
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23
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Ji C, Tang M, Zeidler C, Höhfeld J, Johnson GV. BAG3 and SYNPO (synaptopodin) facilitate phospho-MAPT/Tau degradation via autophagy in neuronal processes. Autophagy 2019; 15:1199-1213. [PMID: 30744518 DOI: 10.1080/15548627.2019.1580096] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
A major cellular catabolic pathway in neurons is macroautophagy/autophagy, through which misfolded or aggregation-prone proteins are sequestered into autophagosomes that fuse with lysosomes, and are degraded. MAPT (microtubule-associated protein tau) is one of the protein clients of autophagy. Given that accumulation of hyperphosphorylated MAPT contributes to the pathogenesis of Alzheimer disease and other tauopathies, decreasing endogenous MAPT levels has been shown to be beneficial to neuronal health in models of these diseases. A previous study demonstrated that the HSPA/HSP70 co-chaperone BAG3 (BCL2-associated athanogene 3) facilitates endogenous MAPT clearance through autophagy. These findings prompted us to further investigate the mechanisms underlying BAG3-mediated autophagy in the degradation of endogenous MAPT. Here we demonstrate for the first time that BAG3 plays an important role in autophagic flux in the neurites of mature neurons (20-24 days in vitro [DIV]) through interaction with the post-synaptic cytoskeleton protein SYNPO (synaptopodin). Loss of either BAG3 or SYNPO impeded the fusion of autophagosomes and lysosomes predominantly in the post-synaptic compartment. A block of autophagy leads to accumulation of the autophagic receptor protein SQSTM1/p62 (sequestosome 1) as well as MAPT phosphorylated at Ser262 (p-Ser262). Furthermore, p-Ser262 appears to accumulate in autophagosomes at post-synaptic densities. Overall these data provide evidence of a novel role for the co-chaperone BAG3 in synapses. In cooperation with SYNPO, it functions as part of a surveillance complex that facilitates the autophagic clearance of MAPT p-Ser262, and possibly other MAPT species at the post-synapse. This appears to be crucial for the maintenance of a healthy, functional synapse.Abbreviations: aa: amino acids; ACTB: actin beta; BafA1: bafilomycin A1; BAG3: BCL2 associated athanogene 3; CQ chloroquine; CTSL: cathepsin L; DIV: days in vitro; DLG4/PSD95: discs large MAGUK scaffold protein 4; HSPA/HSP70: heat shock protein family A (Hsp70); MAP1LC3B/LC3B: microtubule associated protein 1 light chain 3 beta; MAP2: microtubule associated protein 2; MAPT: microtubule associated protein tau; p-Ser262: MAPT phosphorylated at serine 262; p-Ser396/404: MAPT phosphorylated at serines 396 and 404; p-Thr231: MAPT phosphorylated at threonine 231; PBS: phosphate buffered saline; PK: proteinase K; scr: scrambled; shRNA: short hairpin RNA; SQSTM1/p62 sequestosome 1; SYN1: synapsin I; SYNPO synaptopodin; SYNPO2/myopodin: synaptopodin 2; VPS: vacuolar protein sorting.
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Affiliation(s)
- Changyi Ji
- a Department of Anesthesiology , University of Rochester , Rochester , NY , USA
| | - Maoping Tang
- a Department of Anesthesiology , University of Rochester , Rochester , NY , USA
| | - Claudia Zeidler
- b Institute for Cell Biology , University of Bonn , Bonn , Germany
| | - Jörg Höhfeld
- b Institute for Cell Biology , University of Bonn , Bonn , Germany
| | - Gail Vw Johnson
- a Department of Anesthesiology , University of Rochester , Rochester , NY , USA
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24
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Nitric oxide contributes to protein homeostasis by S-nitrosylations of the chaperone HSPA8 and the ubiquitin ligase UBE2D. Redox Biol 2018; 20:217-235. [PMID: 30368041 PMCID: PMC6202877 DOI: 10.1016/j.redox.2018.10.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 09/25/2018] [Accepted: 10/02/2018] [Indexed: 02/06/2023] Open
Abstract
Upregulations of neuronal nitric oxide synthase (nNOS) in the rodent brain have been associated with neuronal aging. To address underlying mechanisms we generated SH-SY5Y neuronal cells constitutively expressing nNOS at a level similar to mouse brain (nNOS+ versus MOCK). Initial experiments revealed S-nitrosylations (SNO) of key players of protein homeostasis: heat shock cognate HSC70/HSPA8 within its nucleotide-binding site, and UBE2D ubiquitin conjugating enzymes at the catalytic site cysteine. HSPA8 is involved in protein folding, organelle import/export and chaperone-mediated LAMP2a-dependent autophagy (CMA). A set of deep redox and full proteome analyses, plus analysis of autophagy, CMA and ubiquitination with rapamycin and starvation as stimuli confirmed the initial observations and revealed a substantial increase of SNO modifications in nNOS+ cells, in particular targeting protein networks involved in protein catabolism, ubiquitination, carbohydrate metabolism and cell cycle control. Importantly, NO-independent reversible oxidations similarly occurred in both cell lines. Functionally, nNOS caused an accumulation of proteins, including CMA substrates and loss of LAMP2a. UBE2D activity and proteasome activity were impaired, resulting in dysregulations of cell cycle checkpoint proteins. The observed changes of protein degradation pathways caused an expansion of the cytoplasm, large lysosomes, slowing of the cell cycle and suppression of proliferation suggesting a switch of the phenotype towards aging, supported by downregulations of neuronal progenitor markers but increase of senescence-associated proteins. Hence, upregulation of nNOS in neuronal cells imposes aging by SNOing of key players of ubiquitination, chaperones and of substrate proteins leading to interference with crucial steps of protein homeostasis.
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25
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Yin C, Zhang G, Sun R, Pan X, Wang X, Li H, Sun Y. miR‑185‑5p inhibits F‑actin polymerization and reverses epithelial mesenchymal transition of human breast cancer cells by modulating RAGE. Mol Med Rep 2018; 18:2621-2630. [PMID: 30015912 PMCID: PMC6102692 DOI: 10.3892/mmr.2018.9294] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 05/10/2018] [Indexed: 11/16/2022] Open
Abstract
In our previous study, advanced glycosylation end-product specific receptor (RAGE) was observed to bind to S100A8/A9 and cause epithelial mesenchymal transition (EMT). The results from target gene prediction revealed that microRNA (miR)-185-5p had a RAGE binding site. However, the function of miR-185-5p in the invasion and migration of breast cancer remains ambiguous. In the present study, the expression of miR-185-5p was examined in breast cancer tissues and cells. Clinical features revealed a negative correlation between miR-185-5p and tumor size, as well as in tumor differentiation and lymph node metastasis in breast cancer. In addition, miR-185-5p was negatively associated with RAGE, and this miRNA reversed the EMT of breast cancer by modulating RAGE in vitro. In addition, miR-185-5p inhibited the S100A8/A9-induced EMT of breast cancer cells by the nuclear factor-κB/Snail signaling pathway. Notably, miR-185-5p upregulation inhibited the F-actin polymerization induced by S100A8/A9 in breast cancer. Furthermore, overexpression of miR-185-5p and reduction of RAGE inhibited lung metastasis node in vivo. Thus, miR-185-5p represents a potential therapeutic target in breast cancer by modulating RAGE.
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Affiliation(s)
- Chonggao Yin
- College of Nursing, Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Guoxin Zhang
- Medicine Research Center, Weifang Medical University, Weifang, Shandong 261053, P.R. China
| | - Ruimei Sun
- Medicine Research Center, Weifang Medical University, Weifang, Shandong 261053, P.R. China
| | - Xinting Pan
- ICU, Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Xuewen Wang
- Medicine Research Center, Weifang Medical University, Weifang, Shandong 261053, P.R. China
| | - Hongli Li
- Medicine Research Center, Weifang Medical University, Weifang, Shandong 261053, P.R. China
| | - Yunbo Sun
- ICU, Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
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26
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Han Z, Schwoerer MP, Hicks P, Liang J, Ruthel G, Berry CT, Freedman BD, Sagum CA, Bedford MT, Sidhu SS, Sudol M, Harty RN. Host Protein BAG3 is a Negative Regulator of Lassa VLP Egress. Diseases 2018; 6:diseases6030064. [PMID: 30011814 PMCID: PMC6163595 DOI: 10.3390/diseases6030064] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/10/2018] [Accepted: 07/12/2018] [Indexed: 12/20/2022] Open
Abstract
Lassa fever virus (LFV) belongs to the Arenaviridae family and can cause acute hemorrhagic fever in humans. The LFV Z protein plays a central role in virion assembly and egress, such that independent expression of LFV Z leads to the production of virus-like particles (VLPs) that mimic egress of infectious virus. LFV Z contains both PTAP and PPPY L-domain motifs that are known to recruit host proteins that are important for mediating efficient virus egress and spread. The viral PPPY motif is known to interact with specific host WW-domain bearing proteins. Here we identified host WW-domain bearing protein BCL2 Associated Athanogene 3 (BAG3) as a LFV Z PPPY interactor using our proline-rich reading array of WW-domain containing mammalian proteins. BAG3 is a stress-induced molecular co-chaperone that functions to regulate cellular protein homeostasis and cell survival via Chaperone-Assisted Selective Autophagy (CASA). Similar to our previously published findings for the VP40 proteins of Ebola and Marburg viruses, our results using VLP budding assays, BAG3 knockout cells, and confocal microscopy indicate that BAG3 is a WW-domain interactor that negatively regulates egress of LFV Z VLPs, rather than promoting VLP release. Our results suggest that CASA and specifically BAG3 may represent a novel host defense mechanism, whereby BAG3 may dampen egress of several hemorrhagic fever viruses by interacting and interfering with the budding function of viral PPxY-containing matrix proteins.
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Affiliation(s)
- Ziying Han
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Michael P Schwoerer
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Philip Hicks
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Jingjing Liang
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Gordon Ruthel
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Corbett T Berry
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Bruce D Freedman
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Cari A Sagum
- Department of Epigenetics & Molecular Carcinogenesis, M.D. Anderson Cancer Center, University of Texas, Smithville, TX 78957, USA.
| | - Mark T Bedford
- Department of Epigenetics & Molecular Carcinogenesis, M.D. Anderson Cancer Center, University of Texas, Smithville, TX 78957, USA.
| | - Sachdev S Sidhu
- Department of Molecular Genetics, University of Toronto, Toronto, ON M1C 1A4, Canada.
| | - Marius Sudol
- Department of Physiology, Institute for Molecular and Cell Biology (IMCB, AStar), National University of Singapore, Singapore 119077, Singapore.
| | - Ronald N Harty
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
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27
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Roperto S, Russo V, Rosati A, Ceccarelli DM, Munday JS, Turco MC, Roperto F. Chaperone-assisted selective autophagy in healthy and papillomavirus-associated neoplastic urothelium of cattle. Vet Microbiol 2018; 221:134-142. [PMID: 29981700 DOI: 10.1016/j.vetmic.2018.06.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 06/13/2018] [Accepted: 06/16/2018] [Indexed: 12/15/2022]
Abstract
Chaperone-assisted selective autophagy (CASA) is a newly-described selective tension-induced macroautophagy pathway mediated by Bag3 that is believed to be essential for mechanotransduction in skeletal muscle and to be an important regulator of the immune system. We investigated CASA machinery both in healthy and in fifteen papillomavirus-associated neoplastic bovine urothelium. The components of CASA complex, that comprises the molecular chaperones HspA8/Hsc70 and Hsp8B/Hsp22 and the cochaperones Bag3 and STUB1/CHIP, were studied by molecular, microscopic and submicroscopic investigations. CASA complex was found to be constitutively expressed in healthy bovine urothelium; its expression increased in urothelial cancers of cattle, namely thirteen papillary carcinomas and two papillary urothelial neoplasm of low malignant potential (PUNLMPs). We suggest that basal levels of CASA are important in the healthy urothelium which interfaces with the community of urinary microbiota thus representing an important epithelial cell-autonomous mechanism of antibacterial defense. Co-immunoprecipitation studies using an antibody against bovine papillomavirus E5 protein revealed that the oncoprotein co-localized with CASA complex in urothelial cancer cells. This suggests that infection by BPV E5 could influence cell behaviour by interfering with basal autophagy processes although this study did not conclusively show that this interaction increased the expression of CASA proteins. In neoplastic urothelium, CASA could be involved in regulating fundamental cellular processes such adhesion, migration, and proliferation and so might influence the biological behaviour of urothelial tumors in cattle.
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Affiliation(s)
- Sante Roperto
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università di Napoli Federico II, Napoli, Italy.
| | - Valeria Russo
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università di Napoli Federico II, Napoli, Italy
| | - Alessandra Rosati
- Dipartimento di Medicina Chirurgia ed Odontoiatria, Schola Medica Salernitana, Università di Salerno, Baronissi, Italy
| | - Dora M Ceccarelli
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università di Napoli Federico II, Napoli, Italy
| | - John S Munday
- Pathobiology, School of Veterinary Sciences, Massey University, Palmerston North, New Zealand
| | - Maria C Turco
- Dipartimento di Medicina Chirurgia ed Odontoiatria, Schola Medica Salernitana, Università di Salerno, Baronissi, Italy
| | - Franco Roperto
- Dipartimento di Biologia, Università di Napoli Federico II, Napoli, Italy
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28
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Exploring the multifaceted roles of heat shock protein B8 (HSPB8) in diseases. Eur J Cell Biol 2018; 97:216-229. [PMID: 29555102 DOI: 10.1016/j.ejcb.2018.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 03/09/2018] [Accepted: 03/12/2018] [Indexed: 02/06/2023] Open
Abstract
HSPB8 is a member of ubiquitous small heat shock protein (sHSP) family, whose expression is induced in response to a wide variety of unfavorable physiological and environmental conditions. Investigation of HSPB8 structure indicated that HSPB8 belongs to the group of so-called intrinsically disordered proteins and possesses a highly flexible structure. Unlike most other sHSPs, HSPB8 tends to form small-molecular-mass oligomers and exhibits substrate-dependent chaperone activity. In cooperation with BAG3, the chaperone activity of HSPB8 was reported to be involved in the delivery of misfolded proteins to the autophagy machinery. Through this way, HSPB8 interferes with pathological processes leading to neurodegenerative diseases. Accordingly, published studies have identified genetic links between mutations of HSPB8 and some kind of neuromuscular diseases, further supporting its important role in neurodegenerative disorders. In addition to their anti-aggregation properties, HSPB8 is indicated to interact with a wide range of client proteins, modulating their maturations and activities, and therefore, regulates a large repertoire of cellular functions, including apoptosis, proliferation, inflammation and etc. As a result, HSPB8 has key roles in cancer biology, autoimmune diseases, cardiac diseases and cerebral vascular diseases.
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29
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Guilbert SM, Lambert H, Rodrigue M, Fuchs M, Landry J, Lavoie JN. HSPB8 and BAG3 cooperate to promote spatial sequestration of ubiquitinated proteins and coordinate the cellular adaptive response to proteasome insufficiency. FASEB J 2018; 32:3518-3535. [DOI: 10.1096/fj.201700558rr] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Solenn M. Guilbert
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
| | - Herman Lambert
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
| | - Marc‐Antoine Rodrigue
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
| | - Margit Fuchs
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
| | - Jacques Landry
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
- Département de Biologie MoléculaireBiochimie Médicale et PathologieUniversité LavalVille de QuébecQuebecCanada
| | - Josée N. Lavoie
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
- Département de Biologie MoléculaireBiochimie Médicale et PathologieUniversité LavalVille de QuébecQuebecCanada
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30
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Bouhy D, Juneja M, Katona I, Holmgren A, Asselbergh B, De Winter V, Hochepied T, Goossens S, Haigh JJ, Libert C, Ceuterick-de Groote C, Irobi J, Weis J, Timmerman V. A knock-in/knock-out mouse model of HSPB8-associated distal hereditary motor neuropathy and myopathy reveals toxic gain-of-function of mutant Hspb8. Acta Neuropathol 2018; 135:131-148. [PMID: 28780615 PMCID: PMC5756276 DOI: 10.1007/s00401-017-1756-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 07/20/2017] [Accepted: 07/25/2017] [Indexed: 12/14/2022]
Abstract
Mutations in the small heat shock protein B8 gene (HSPB8/HSP22) have been associated with distal hereditary motor neuropathy, Charcot-Marie-Tooth disease, and recently distal myopathy. It is so far not clear how mutant HSPB8 induces the neuronal and muscular phenotypes and if a common pathogenesis lies behind these diseases. Growing evidence points towards a role of HSPB8 in chaperone-associated autophagy, which has been shown to be a determinant for the clearance of poly-glutamine aggregates in neurodegenerative diseases but also for the maintenance of skeletal muscle myofibrils. To test this hypothesis and better dissect the pathomechanism of mutant HSPB8, we generated a new transgenic mouse model leading to the expression of the mutant protein (knock-in lines) or the loss-of-function (functional knock-out lines) of the endogenous protein Hspb8. While the homozygous knock-in mice developed motor deficits associated with degeneration of peripheral nerves and severe muscle atrophy corroborating patient data, homozygous knock-out mice had locomotor performances equivalent to those of wild-type animals. The distal skeletal muscles of the post-symptomatic homozygous knock-in displayed Z-disk disorganisation, granulofilamentous material accumulation along with Hspb8, αB-crystallin (HSPB5/CRYAB), and desmin aggregates. The presence of the aggregates correlated with reduced markers of effective autophagy. The sciatic nerve of the homozygous knock-in mice was characterized by low autophagy potential in pre-symptomatic and Hspb8 aggregates in post-symptomatic animals. On the other hand, the sciatic nerve of the homozygous knock-out mice presented a normal morphology and their distal muscle displayed accumulation of abnormal mitochondria but intact myofiber and Z-line organisation. Our data, therefore, suggest that toxic gain-of-function of mutant Hspb8 aggregates is a major contributor to the peripheral neuropathy and the myopathy. In addition, mutant Hspb8 induces impairments in autophagy that may aggravate the phenotype.
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Affiliation(s)
- Delphine Bouhy
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences and Institute Born Bunge, University of Antwerp, Universiteitsplein 1, 2610, Antwerpen, Belgium
| | - Manisha Juneja
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences and Institute Born Bunge, University of Antwerp, Universiteitsplein 1, 2610, Antwerpen, Belgium
| | - Istvan Katona
- Institute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Anne Holmgren
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences and Institute Born Bunge, University of Antwerp, Universiteitsplein 1, 2610, Antwerpen, Belgium
| | - Bob Asselbergh
- VIB Center for Molecular Neurology, University of Antwerp, Antwerpen, Belgium
| | - Vicky De Winter
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences and Institute Born Bunge, University of Antwerp, Universiteitsplein 1, 2610, Antwerpen, Belgium
| | - Tino Hochepied
- Transgenic Mouse Core Facility, VIB Inflammation Research Center, Gent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Gent, Belgium
| | - Steven Goossens
- Department of Biomedical Molecular Biology, Ghent University, Gent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, Gent, Belgium
- VIB Inflammation Research Center, Ghent University, Gent, Belgium
| | - Jody J Haigh
- Department of Biomedical Molecular Biology, Ghent University, Gent, Belgium
- Mammalian Functional Genetics Laboratory, Division of Blood Cancers, Australian Centre for Blood Diseases, Monash University, Melbourne, VIC, 3004, Australia
| | - Claude Libert
- VIB Inflammation Research Center, Ghent University, Gent, Belgium
| | - Chantal Ceuterick-de Groote
- Laboratory of Neuromuscular Pathology, Institute Born-Bunge and Translational Neurosciences, University of Antwerp, Antwerpen, Belgium
| | - Joy Irobi
- Neurofunctional Genomics, Biomedical Research Institute (BIOMED), Hasselt University/Transnational University Limburg, School of Life Sciences, Diepenbeek, Belgium
| | - Joachim Weis
- Institute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Vincent Timmerman
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences and Institute Born Bunge, University of Antwerp, Universiteitsplein 1, 2610, Antwerpen, Belgium.
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31
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Klimek C, Kathage B, Wördehoff J, Höhfeld J. BAG3-mediated proteostasis at a glance. J Cell Sci 2017; 130:2781-2788. [DOI: 10.1242/jcs.203679] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
ABSTRACT
Cellular and organismal survival depend on the ability to maintain the proteome, even under conditions that threaten protein integrity. BCL2-associated athanogene 3 (BAG3) is essential for protein homeostasis (proteostasis) in stressed cells. Owing to its multi-domain structure, it engages in diverse processes that are crucial for proteome maintenance. BAG3 promotes the activity of molecular chaperones, sequesters and concentrates misfolded proteins, initiates autophagic disposal, and balances transcription, translation and degradation. In this Cell Science at a Glance article and the accompanying poster, we discuss the functions of this multi-functional proteostasis tool with a focus on mechanical stress protection and describe the importance of BAG3 for human physiology and pathophysiology.
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Affiliation(s)
- Christina Klimek
- Institute for Cell Biology, University of Bonn, Ulrich-Haberland-Str. 61a, D-53121 Bonn, Germany
| | - Barbara Kathage
- Institute for Cell Biology, University of Bonn, Ulrich-Haberland-Str. 61a, D-53121 Bonn, Germany
| | - Judith Wördehoff
- Institute for Cell Biology, University of Bonn, Ulrich-Haberland-Str. 61a, D-53121 Bonn, Germany
| | - Jörg Höhfeld
- Institute for Cell Biology, University of Bonn, Ulrich-Haberland-Str. 61a, D-53121 Bonn, Germany
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