1
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Epstein-Barr virus-induced gene 3 commits human mesenchymal stem cells to differentiate into chondrocytes via endoplasmic reticulum stress sensor. PLoS One 2022; 17:e0279584. [PMID: 36548354 PMCID: PMC9778607 DOI: 10.1371/journal.pone.0279584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 12/11/2022] [Indexed: 12/24/2022] Open
Abstract
Mesenchymal stem cells (MSC) can differentiate into chondrocytes. Epstein-Barr virus-induced gene 3 (EBI3) is differentially expressed during chondrogenic differentiation and can be produced by MSC. EBI3 is also a subunit of interleukin (IL)-27 and IL-35, and it accumulates in the endoplasmic reticulum (ER) when its partners, such as IL-27 p28 and IL-35 p35, are insufficient. ER stress induced by protein accumulation is responsible for chondrogenic differentiation. However, the role of EBI3 and its relevance to the ER stress in chondrogenic differentiation of MSC have never been addressed. Here, we demonstrate that EBI3 protein is expressed in the early stage of chondrogenic differentiation of MSC. Additionally, knockdown, overexpression, or induction of EBI3 through IL-1β inhibits chondrogenesis. We show that EBI3 localizes and accumulates in the ER of MSC after overexpression or induction by IL-1β and TNF-α, whereas ER stress inhibitor 4-phenylbutyric acid decreases its accumulation in MSC. Moreover, EBI3 modulates ER stress sensor inositol-requiring enzyme 1 α (IRE1α) after induced by IL-1β, and MSC-like cells coexpress EBI3 and IRE1α in rheumatoid arthritis (RA) synovial tissue. Altogether, these data demonstrate that intracellular EBI3 commits to chondrogenic differentiation by regulating ER stress sensor IRE1α.
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2
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Wiseman RL, Mesgarzadeh JS, Hendershot LM. Reshaping endoplasmic reticulum quality control through the unfolded protein response. Mol Cell 2022; 82:1477-1491. [PMID: 35452616 PMCID: PMC9038009 DOI: 10.1016/j.molcel.2022.03.025] [Citation(s) in RCA: 99] [Impact Index Per Article: 49.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/28/2022] [Accepted: 03/18/2022] [Indexed: 01/09/2023]
Abstract
Endoplasmic reticulum quality control (ERQC) pathways comprising chaperones, folding enzymes, and degradation factors ensure the fidelity of ER protein folding and trafficking to downstream secretory environments. However, multiple factors, including tissue-specific secretory proteomes, environmental and genetic insults, and organismal aging, challenge ERQC. Thus, a key question is: how do cells adapt ERQC to match the diverse, ever-changing demands encountered during normal physiology and in disease? The answer lies in the unfolded protein response (UPR), a signaling mechanism activated by ER stress. In mammals, the UPR comprises three signaling pathways regulated downstream of the ER membrane proteins IRE1, ATF6, and PERK. Upon activation, these UPR pathways remodel ERQC to alleviate cellular stress and restore ER function. Here, we describe how UPR signaling pathways adapt ERQC, highlighting their importance for maintaining ER function across tissues and the potential for targeting the UPR to mitigate pathologies associated with protein misfolding diseases.
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Affiliation(s)
- R. Luke Wiseman
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037,To whom correspondences should be addressed: Linda Hendershot, ; R. Luke Wiseman,
| | - Jaleh S. Mesgarzadeh
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | - Linda M. Hendershot
- Department of Tumor Biology, St Jude Children’s Research Hospital, Memphis, TN 38105,To whom correspondences should be addressed: Linda Hendershot, ; R. Luke Wiseman,
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3
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Mesgarzadeh JS, Buxbaum JN, Wiseman RL. Stress-responsive regulation of extracellular proteostasis. J Cell Biol 2022; 221:213026. [PMID: 35191945 PMCID: PMC8868021 DOI: 10.1083/jcb.202112104] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/02/2022] [Accepted: 02/02/2022] [Indexed: 12/18/2022] Open
Abstract
Genetic, environmental, and aging-related insults can promote the misfolding and subsequent aggregation of secreted proteins implicated in the pathogenesis of numerous diseases. This has led to considerable interest in understanding the molecular mechanisms responsible for regulating proteostasis in extracellular environments such as the blood and cerebrospinal fluid (CSF). Extracellular proteostasis is largely dictated by biological pathways comprising chaperones, folding enzymes, and degradation factors localized to the ER and extracellular space. These pathways limit the accumulation of nonnative, potentially aggregation-prone proteins in extracellular environments. Many reviews discuss the molecular mechanisms by which these pathways impact the conformational integrity of the secreted proteome. Here, we instead focus on describing the stress-responsive mechanisms responsible for adapting ER and extracellular proteostasis pathways to protect the secreted proteome from pathologic insults that challenge these environments. Further, we highlight new strategies to identify stress-responsive pathways involved in regulating extracellular proteostasis and describe the pathologic and therapeutic implications for these pathways in human disease.
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Affiliation(s)
| | - Joel N Buxbaum
- Department of Molecular Medicine, Scripps Research, La Jolla, CA
| | - R Luke Wiseman
- Department of Molecular Medicine, Scripps Research, La Jolla, CA
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4
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Anelli T, Dalla Torre M, Borini E, Mangini E, Ulisse A, Semino C, Sitia R, Panina-Bordignon P. Profound architectural and functional readjustments of the secretory pathway in decidualization of endometrial stromal cells. Traffic 2021; 23:4-20. [PMID: 34651407 DOI: 10.1111/tra.12822] [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: 12/10/2020] [Revised: 07/10/2021] [Accepted: 10/07/2021] [Indexed: 12/19/2022]
Abstract
Certain cell types must expand their exocytic pathway to guarantee efficiency and fidelity of protein secretion. A spectacular case is offered by decidualizing human endometrial stromal cells (EnSCs). In the midluteal phase of the menstrual cycle, progesterone stimulation induces proliferating EnSCs to differentiate into professional secretors releasing proteins essential for efficient blastocyst implantation. Here, we describe the architectural rearrangements of the secretory pathway of a human EnSC line (TERT-immortalized human endometrial stromal cells (T-HESC)). As in primary cells, decidualization entails proliferation arrest and the coordinated expansion of the entire secretory pathway without detectable activation of unfolded protein response (UPR) pathways. Decidualization proceeds also in the absence of ascorbic acid, an essential cofactor for collagen biogenesis, despite also the secretion of some proteins whose folding does not depend on vitamin C is impaired. However, even in these conditions, no overt UPR induction can be detected. Morphometric analyses reveal that the exocytic pathway does not increase relatively to the volume of the cell. Thus, differently from other cell types, abundant production is guaranteed by a coordinated increase of the cell size following arrest of proliferation.
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Affiliation(s)
- Tiziana Anelli
- Faculty of Medicine, San Raffaele Vita-Salute University, Milan, Italy.,Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Marco Dalla Torre
- Faculty of Medicine, San Raffaele Vita-Salute University, Milan, Italy
| | - Elena Borini
- Faculty of Medicine, San Raffaele Vita-Salute University, Milan, Italy
| | - Elisabetta Mangini
- Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Adele Ulisse
- Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Claudia Semino
- Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Roberto Sitia
- Faculty of Medicine, San Raffaele Vita-Salute University, Milan, Italy.,Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Paola Panina-Bordignon
- Faculty of Medicine, San Raffaele Vita-Salute University, Milan, Italy.,Division of Neuroscience, IRCCS Ospedale San Raffaele, Milan, Italy
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5
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Collagen's enigmatic, highly conserved N-glycan has an essential proteostatic function. Proc Natl Acad Sci U S A 2021; 118:2026608118. [PMID: 33674390 DOI: 10.1073/pnas.2026608118] [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] [Indexed: 11/18/2022] Open
Abstract
Intracellular procollagen folding begins at the protein's C-terminal propeptide (C-Pro) domain, which initiates triple-helix assembly and defines the composition and chain register of fibrillar collagen trimers. The C-Pro domain is later proteolytically cleaved and excreted from the body, while the mature triple helix is incorporated into the extracellular matrix. The procollagen C-Pro domain possesses a single N-glycosylation site that is widely conserved in all the fibrillar procollagens across humans and diverse other species. Given that the C-Pro domain is removed once procollagen folding is complete, the N-glycan might be presumed to be important for folding. Surprisingly, however, there is no difference in the folding and secretion of N-glycosylated versus non-N-glycosylated collagen type-I, leaving the function of the N-glycan unclear. We hypothesized that the collagen N-glycan might have a context-dependent function, specifically, that it could be required to promote procollagen folding only when proteostasis is challenged. We show that removal of the N-glycan from misfolding-prone C-Pro domain variants does indeed cause serious procollagen and ER proteostasis defects. The N-glycan promotes folding and secretion of destabilized C-Pro variants by providing access to the ER's lectin-based chaperone machinery. Finally, we show that the C-Pro N-glycan is actually critical for the folding and secretion of even wild-type procollagen under ER stress conditions. Such stress is commonly incurred during development, wound healing, and other processes in which collagen production plays a key role. Collectively, these results establish an essential, context-dependent function for procollagen's previously enigmatic N-glycan, wherein the carbohydrate moiety buffers procollagen folding against proteostatic challenge.
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6
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Lemarié M, Chatonnet F, Caron G, Fest T. Early Emergence of Adaptive Mechanisms Sustaining Ig Production: Application to Antibody Therapy. Front Immunol 2021; 12:671998. [PMID: 33995412 PMCID: PMC8117215 DOI: 10.3389/fimmu.2021.671998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/12/2021] [Indexed: 01/13/2023] Open
Abstract
Antibody therapy, where artificially-produced immunoglobulins (Ig) are used to treat pathological conditions such as auto-immune diseases and cancers, is a very innovative and competitive field. Although substantial efforts have been made in recent years to obtain specific and efficient antibodies, there is still room for improvement especially when considering a precise tissular targeting or increasing antigen affinity. A better understanding of the cellular and molecular steps of terminal B cell differentiation, in which an antigen-activated B cell becomes an antibody secreting cell, may improve antibody therapy. In this review, we use our recently published data about human B cell differentiation, to show that the mechanisms necessary to adapt a metamorphosing B cell to its new secretory function appear quite early in the differentiation process i.e., at the pre-plasmablast stage. After characterizing the molecular pathways appearing at this stage, we will focus on recent findings about two main processes involved in antibody production: unfolded protein response (UPR) and endoplasmic reticulum (ER) stress. We’ll show that many genes coding for factors involved in UPR and ER stress are induced at the pre-plasmablast stage, sustaining our hypothesis. Finally, we propose to use this recently acquired knowledge to improve productivity of industrialized therapeutic antibodies.
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Affiliation(s)
- Maud Lemarié
- Université de Rennes 1, INSERM, Établissement Français du Sang de Bretagne, UMR_S1236, Rennes, France
| | - Fabrice Chatonnet
- Université de Rennes 1, INSERM, Établissement Français du Sang de Bretagne, UMR_S1236, Rennes, France.,Laboratoire d'Hématologie, Pôle de Biologie, Centre Hospitalier Universitaire, Rennes, France
| | - Gersende Caron
- Université de Rennes 1, INSERM, Établissement Français du Sang de Bretagne, UMR_S1236, Rennes, France.,Laboratoire d'Hématologie, Pôle de Biologie, Centre Hospitalier Universitaire, Rennes, France
| | - Thierry Fest
- Université de Rennes 1, INSERM, Établissement Français du Sang de Bretagne, UMR_S1236, Rennes, France.,Laboratoire d'Hématologie, Pôle de Biologie, Centre Hospitalier Universitaire, Rennes, France
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7
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Novais EJ, Choi H, Madhu V, Suyama K, Anjo SI, Manadas B, Shapiro IM, Salgado AJ, Risbud MV. Hypoxia and Hypoxia-Inducible Factor-1α Regulate Endoplasmic Reticulum Stress in Nucleus Pulposus Cells: Implications of Endoplasmic Reticulum Stress for Extracellular Matrix Secretion. THE AMERICAN JOURNAL OF PATHOLOGY 2021; 191:487-502. [PMID: 33307037 PMCID: PMC7927276 DOI: 10.1016/j.ajpath.2020.11.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 11/03/2020] [Accepted: 11/24/2020] [Indexed: 12/20/2022]
Abstract
Endoplasmic reticulum (ER) stress is shown to promote nucleus pulposus (NP) cell apoptosis and intervertebral disc degeneration. However, little is known about ER stress regulation by the hypoxic disc microenvironment and its contribution to extracellular matrix homeostasis. NP cells were cultured under hypoxia (1% partial pressure of oxygen) to assess ER stress status, and gain-of-function and loss-of-function approaches were used to assess the role of hypoxia-inducible factor (HIF)-1α in this pathway. In addition, the contribution of ER stress induction on the NP cell secretome was assessed by a nontargeted quantitative proteomic analysis by sequential windowed data independent acquisition of the total high-resolution mass spectra-mass spectrometry. NP cells exhibited a lower ER stress burden under hypoxia. Knockdown of HIF-1α increased C/EBP homologous protein, protein kinase RNA-like endoplasmic reticulum kinase (PERK), and activating transcription factor 6 (ATF6) levels, whereas HIF-1α stabilization decreased the expression of ER stress markers Ddit3, Hsp5a, Atf6, and Eif2a. Interestingly, ER stress inducers tunicamycin and thapsigargin induced HIF-1α activity under hypoxia while promoting the unfolded protein response. NP cell secretome analysis demonstrated an impact of ER stress induction on extracellular matrix secretion, with decreases in collagens and cell adhesion-related proteins. Moreover, analysis of transcriptomic data of NP tissues from aged mice and degenerated human discs showed higher levels of unfolded protein response markers and decreased levels of matrix components. Our study shows, for the first time, that hypoxia and HIF-1α attenuate ER stress responses in NP cells, and ER stress promotes inefficient extracellular matrix secretion under hypoxia.
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Affiliation(s)
- Emanuel J Novais
- Department of Orthopedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania; Graduate Program in Cell Biology and Regenerative Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania; Life and Health Sciences Research Institute, School of Medicine, University of Minho, Braga, Portugal; Life and Health Sciences Research Institute/Biomaterials, Biodegradables and Biomimetics (ICVS/3B's) - PT Government Associate Laboratory, Braga, Portugal
| | - Hyowon Choi
- Department of Orthopedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania; Graduate Program in Cell Biology and Regenerative Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Vedavathi Madhu
- Department of Orthopedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania; Graduate Program in Cell Biology and Regenerative Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Kaori Suyama
- Department of Orthopedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania; Department of Anatomy and Cellular Biology, Tokai University School of Medicine, Isehara, Japan
| | - Sandra I Anjo
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Bruno Manadas
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Irving M Shapiro
- Department of Orthopedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania; Graduate Program in Cell Biology and Regenerative Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - António J Salgado
- Life and Health Sciences Research Institute, School of Medicine, University of Minho, Braga, Portugal; Life and Health Sciences Research Institute/Biomaterials, Biodegradables and Biomimetics (ICVS/3B's) - PT Government Associate Laboratory, Braga, Portugal
| | - Makarand V Risbud
- Department of Orthopedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania; Graduate Program in Cell Biology and Regenerative Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania.
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8
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Jin N, Jin N, Wang Z, Liu L, Meng L, Li D, Li X, Zhou D, Liu J, Bu W, Sun H, Yang B. Osteopromotive carbon dots promote bone regeneration through the PERK-eIF2α-ATF4 pathway. Biomater Sci 2021; 8:2840-2852. [PMID: 32307492 DOI: 10.1039/d0bm00424c] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bone defects are still an unsolved clinical issue that must be overcome. Carbon dots have shown very promising effects in biological therapy. In the current study, we explored their effects on osteogenesis. Furthermore, we revealed the mechanisms in order to develop novel therapeutic approaches to manage the bone defect. For this study, ascorbic acid carbon dots (CDs) were created by a one-step microwave-assisted method. Results showed that the CDs effectively enhanced matrix mineralization, promoted osteogenic differentiation in vitro, and promoted new bone regeneration in the skull defect model in vivo. Furthermore, our data demonstrated that the ER stress and PERK-eIF2α-ATF4 pathway were activated by the CD-induced increase in intracellular calcium. Taken together, our findings suggest that the PERK pathway plays a critical role in CD-induced osteogenic differentiation, and the CDs created herein have the potential to be used to repair bone defects in clinical practice.
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Affiliation(s)
- Nianqiang Jin
- Department of Oral Pathology, School and Hospital of Stomatology, China Medical University, 110001, Shenyang, China.
| | - Nuo Jin
- Department of Oral Pathology, School and Hospital of Stomatology, China Medical University, 110001, Shenyang, China.
| | - Zilin Wang
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, 130000, Changchun, China.
| | - Lili Liu
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, 130000, Changchun, China.
| | - Lin Meng
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, 130000, Changchun, China.
| | - Daowei Li
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School of Stomatology, Jilin University, Changchun, 130021, China.
| | - Xing Li
- Department of Oral Pathology, School and Hospital of Stomatology, China Medical University, 110001, Shenyang, China.
| | - Dabo Zhou
- School and Hospital of Stomatology, China Medical University, 117 Nanjing North Street, Shenyang, 110001, China.
| | - Jie Liu
- Department of Head and Neck Tumor Surgery, School of Stomatology, Wuhan University, Wuhan, 430000, China.
| | - Wenhuan Bu
- Department of Dental Materials, School of Stomatology, China Medical University, Shenyang 110001, China. and Department of Center Laboratory, School of Stomatology, China Medical University, Shenyang 110001, China
| | - Hongchen Sun
- Department of Oral Pathology, School and Hospital of Stomatology, China Medical University, 110001, Shenyang, China.
| | - Bai Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, China
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9
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Starting at the beginning: endoplasmic reticulum proteostasis and systemic amyloid disease. Biochem J 2020; 477:1721-1732. [PMID: 32412081 DOI: 10.1042/bcj20190312] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 12/20/2022]
Abstract
Systemic amyloid diseases are characterized by the deposition of an amyloidogenic protein as toxic oligomers and amyloid fibrils on tissues distal from the site of protein synthesis. Traditionally, these diseases have been viewed as disorders of peripheral target tissues where aggregates are deposited, and toxicity is observed. However, recent evidence highlights an important role for endoplasmic reticulum (ER) proteostasis pathways within tissues synthesizing and secreting amyloidogenic proteins, such as the liver, in the pathogenesis of these disorders. Here, we describe the pathologic implications of ER proteostasis and its regulation on the toxic extracellular aggregation of amyloidogenic proteins implicated in systemic amyloid disease pathogenesis. Furthermore, we discuss the therapeutic potential for targeting ER proteostasis to reduce the secretion and toxic aggregation of amyloidogenic proteins to mitigate peripheral amyloid-associated toxicity involved in the onset and progression of systemic amyloid diseases.
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10
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Aryal YP, Lee ES, Kim TY, Sung S, Kim JY, An SY, Jung JK, Ha JH, Suh JY, Yamamoto H, Sohn WJ, Cho SW, Lee Y, An CH, Kim JY. Stage-specific expression patterns of ER stress-related molecules in mice molars: Implications for tooth development. Gene Expr Patterns 2020; 37:119130. [PMID: 32758541 DOI: 10.1016/j.gep.2020.119130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 07/27/2020] [Accepted: 07/27/2020] [Indexed: 01/13/2023]
Abstract
The endoplasmic reticulum (ER) is a site where protein folding and posttranslational modifications occur, but when unfolded or misfolded proteins accumulate in the ER lumen, an unfolded protein response (UPR) occurs. A UPR activates ER-stress signalling genes, including inositol-requiring enzyme-1 (Ire1), activating transcription factor 6 (Atf6), and double-stranded RNA-activated protein kinase-like endoplasmic reticulum kinase (Perk), to maintain homeostasis. The involvement of ER stress molecules in metabolic disease and hard tissue matrix formation has been established; however, an understanding of the role of ER-stress signalling molecules in tooth development is lacking. The aims of this study are to define the stage-specific expression patterns of ER stress-related molecules and to elucidate their putative functions in the organogenesis of teeth. This study leverages knowledge of the tissue morphology and expression patterns of a range of signalling molecules during tooth development. RT-qPCR, in situ hybridization, and immunohistochemistry analyses were performed to determine the stage-specific expression patterns of ER-stress-related signalling molecules at important stages of tooth development. RT-qPCR analyses showed that Atf6 and Perk have similar expression levels during all stages of tooth development; however, the expression levels of Ire1 and its downstream target X-box binding protein (Xbp1) increased significantly from the cap to the secretory stage of tooth development. In situ hybridization results revealed that Atf6 and Xbp1 were expressed in cells that form the enamel knot at cap stage and ameloblasts and odontoblasts at secretory stage in stage-specific patterns. In addition, Atf6, Ire1, and Xbp1 expression exhibited distinct localization patterns in secretory odontoblasts and ameloblasts of PN0 molars. Overall, our results strongly suggest that ER-stress molecules are involved in tooth development in response to protein overload that occurs during signaling modulations from enamel knots at cap stage and extracellular matrix secretion at secretory stage.
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Affiliation(s)
- Yam Prasad Aryal
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Eui-Seon Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Tae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Shijin Sung
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Ji-Youn Kim
- Department of Dental Hygiene, Gachon University, Incheon, South Korea
| | - Seo-Young An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Jae-Kwang Jung
- Department of Oral Medicine, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Jung-Hong Ha
- Department of Conservative Dentistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Jo-Young Suh
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology, Tokyo Dental College, Tokyo, Japan
| | - Wern-Joo Sohn
- Pre-Major of Cosmetics and Pharmaceutics, Daegu Haany University, Gyeongsan, South Korea
| | - Sung-Won Cho
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Yonsei University College of Dentistry, Seoul, South Korea
| | - Youngkyun Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Chang-Hyeon An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Jae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea.
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11
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Abstract
Cartilage comprises a single cell type, the chondrocyte, embedded in a highly complex extracellular matrix. Disruption to the cartilage growth plate leads to reduced bone growth and results in a clinically diverse group of conditions known as genetic skeletal diseases (GSDs). Similarly, long-term degradation of articular cartilage can lead to osteoarthritis (OA), a disease characterised by joint pain and stiffness. As professionally secreting cells, chondrocytes are particularly susceptible to endoplasmic reticulum (ER) stress and this has been identified as a core disease mechanism in a group of clinically and pathologically related GSDs. If unresolved, ER stress can lead to chondrocyte cell death. Recent interest has focused on ER stress as a druggable target for GSDs and this has led to the first clinical trial for a GSD by repurposing an antiepileptic drug. Interestingly, ER stress markers have also been associated with OA in multiple cell and animal models and there is increasing interest in it as a possible therapeutic target for treatment. In summary, chondrocyte ER stress has been identified as a core disease mechanism in GSDs and as a contributory factor in OA. Thus, chondrocyte ER stress is a unifying factor for both common and rare cartilage-related diseases and holds promise as a novel therapeutic target.
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Affiliation(s)
- Michael D Briggs
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - Ella P Dennis
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - Helen F Dietmar
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - Katarzyna A Pirog
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
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12
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Soni H, Bode J, Nguyen CDL, Puccio L, Neßling M, Piro RM, Bub J, Phillips E, Ahrends R, Eipper BA, Tews B, Goidts V. PERK-mediated expression of peptidylglycine α-amidating monooxygenase supports angiogenesis in glioblastoma. Oncogenesis 2020; 9:18. [PMID: 32054826 PMCID: PMC7018722 DOI: 10.1038/s41389-020-0201-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 12/19/2019] [Accepted: 01/20/2020] [Indexed: 12/17/2022] Open
Abstract
PKR-like kinase (PERK) plays a significant role in inducing angiogenesis in various cancer types including glioblastoma. By proteomics analysis of the conditioned medium from a glioblastoma cell line treated with a PERK inhibitor, we showed that peptidylglycine α-amidating monooxygenase (PAM) expression is regulated by PERK under hypoxic conditions. Moreover, PERK activation via CCT020312 (a PERK selective activator) increased the cleavage and thus the generation of PAM cleaved cytosolic domain (PAM sfCD) that acts as a signaling molecule from the cytoplasm to the nuclei. PERK was also found to interact with PAM, suggesting a possible involvement in the generation of PAM sfCD. Knockdown of PERK or PAM reduced the formation of tubes by HUVECs in vitro. Furthermore, in vivo data highlighted the importance of PAM in the growth of glioblastoma with reduction of PAM expression in engrafted tumor significantly increasing the survival in mice. In summary, our data revealed PAM as a potential target for antiangiogenic therapy in glioblastoma.
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Affiliation(s)
- Himanshu Soni
- Brain Tumor Translational Targets, DKFZ Junior Group, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Molecular Mechanisms of Tumor Invasion, Schaller Research Group, University of Heidelberg and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Julia Bode
- Molecular Mechanisms of Tumor Invasion, Schaller Research Group, University of Heidelberg and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Chi D L Nguyen
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V, Dortmund, Germany
| | - Laura Puccio
- Brain Tumor Translational Targets, DKFZ Junior Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Michelle Neßling
- Central Unit Electron Microscopy, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Rosario M Piro
- Institute of Computer Science, Institute of Bioinformatics, Freie Universität Berlin, Berlin, Germany.,Institute of Medical Genetics and Human Genetics, Charité-Universitätsmedizin Berlin, Berlin, Germany.,German Cancer Consortium (DKTK) partner site Berlin, and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jonas Bub
- Brain Tumor Translational Targets, DKFZ Junior Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Emma Phillips
- Brain Tumor Translational Targets, DKFZ Junior Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Robert Ahrends
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V, Dortmund, Germany.,Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Wien, Austria
| | | | - Björn Tews
- Molecular Mechanisms of Tumor Invasion, Schaller Research Group, University of Heidelberg and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Violaine Goidts
- Brain Tumor Translational Targets, DKFZ Junior Group, German Cancer Research Center (DKFZ), Heidelberg, Germany.
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13
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Kitakaze K, Taniuchi S, Kawano E, Hamada Y, Miyake M, Oyadomari M, Kojima H, Kosako H, Kuribara T, Yoshida S, Hosoya T, Oyadomari S. Cell-based HTS identifies a chemical chaperone for preventing ER protein aggregation and proteotoxicity. eLife 2019; 8:e43302. [PMID: 31843052 PMCID: PMC6922633 DOI: 10.7554/elife.43302] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 11/24/2019] [Indexed: 02/06/2023] Open
Abstract
The endoplasmic reticulum (ER) is responsible for folding secretory and membrane proteins, but disturbed ER proteostasis may lead to protein aggregation and subsequent cellular and clinical pathologies. Chemical chaperones have recently emerged as a potential therapeutic approach for ER stress-related diseases. Here, we identified 2-phenylimidazo[2,1-b]benzothiazole derivatives (IBTs) as chemical chaperones in a cell-based high-throughput screen. Biochemical and chemical biology approaches revealed that IBT21 directly binds to unfolded or misfolded proteins and inhibits protein aggregation. Finally, IBT21 prevented cell death caused by chemically induced ER stress and by a proteotoxin, an aggression-prone prion protein. Taken together, our data show the promise of IBTs as potent chemical chaperones that can ameliorate diseases resulting from protein aggregation under ER stress.
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Affiliation(s)
- Keisuke Kitakaze
- Division of Molecular Biology, Institute for Genome Research, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
- Fujii Memorial Institute of Medical Sciences, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
- Department of PharmacologyKawasaki Medical SchoolKurashikiJapan
| | - Shusuke Taniuchi
- Division of Molecular Biology, Institute for Genome Research, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
- Fujii Memorial Institute of Medical Sciences, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
- Department of Molecular Research, Diabetes Therapeutics and Research Center, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
| | - Eri Kawano
- Division of Molecular Biology, Institute for Genome Research, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
| | - Yoshimasa Hamada
- Division of Molecular Biology, Institute for Genome Research, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
- Fujii Memorial Institute of Medical Sciences, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
| | - Masato Miyake
- Division of Molecular Biology, Institute for Genome Research, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
- Fujii Memorial Institute of Medical Sciences, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
- Department of Molecular Research, Diabetes Therapeutics and Research Center, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
| | - Miho Oyadomari
- Division of Molecular Biology, Institute for Genome Research, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
| | - Hirotatsu Kojima
- Drug Discovery Initiative (DDI)The University of TokyoTokyoJapan
| | - Hidetaka Kosako
- Fujii Memorial Institute of Medical Sciences, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
| | - Tomoko Kuribara
- Laboratory of Chemical Bioscience, Institute of Biomaterials and BioengineeringTokyo Medical and Dental University (TMDU)TokyoJapan
| | - Suguru Yoshida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and BioengineeringTokyo Medical and Dental University (TMDU)TokyoJapan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and BioengineeringTokyo Medical and Dental University (TMDU)TokyoJapan
| | - Seiichi Oyadomari
- Division of Molecular Biology, Institute for Genome Research, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
- Fujii Memorial Institute of Medical Sciences, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
- Department of Molecular Research, Diabetes Therapeutics and Research Center, Institute of Advanced Medical SciencesTokushima UniversityTokushimaJapan
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14
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Japanese Encephalitis Virus Induces Apoptosis and Encephalitis by Activating the PERK Pathway. J Virol 2019; 93:JVI.00887-19. [PMID: 31189710 DOI: 10.1128/jvi.00887-19] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 06/06/2019] [Indexed: 12/24/2022] Open
Abstract
Accumulated evidence demonstrates that Japanese encephalitis virus (JEV) infection triggers endoplasmic reticulum (ER) stress and neuron apoptosis. ER stress sensor protein kinase R-like endoplasmic reticulum kinase (PERK) has been reported to induce apoptosis under acute or prolonged ER stress. However, the precise role of PERK in JEV-induced apoptosis and encephalitis remains unknown. Here, we report that JEV infection activates the PERK-ATF4-CHOP apoptosis pathway both in vitro and in vivo PERK activation also promotes the formation of stress granule, which in turn represses JEV-induced apoptosis. However, PERK inhibitor reduces apoptosis, indicating that JEV-activated PERK predominantly induces apoptosis via the PERK-ATF4-CHOP apoptosis pathway. Among JEV proteins that have been reported to induce ER stress, only JEV NS4B can induce PERK activation. PERK has been reported to form an active molecule by dimerization. The coimmunoprecipitation assay shows that NS4B interacts with PERK. Moreover, glycerol gradient centrifugation shows that NS4B induces PERK dimerization. Both the LIG-FHA and the LIG-WD40 domains within NS4B are required to induce PERK dimerization, suggesting that JEV NS4B pulls two PERK molecules together by simultaneously interacting with them via different motifs. PERK deactivation reduces brain cell damage and encephalitis during JEV infection. Furthermore, expression of JEV NS4B is sufficient to induce encephalitis via PERK in mice, indicating that JEV activates PERK primarily via its NS4B to cause encephalitis. Taken together, our findings provide a novel insight into JEV-caused encephalitis.IMPORTANCE Japanese encephalitis virus (JEV) infection triggers endoplasmic reticulum (ER) stress and neuron apoptosis. ER stress sensor protein kinase R-like endoplasmic reticulum kinase (PERK) has been reported to induce apoptosis under acute or prolonged ER stress. However, whether the PERK pathway of ER stress response plays important roles in JEV-induced apoptosis and encephalitis remains unknown. Here, we found that JEV infection activates ER stress sensor PERK in neuronal cells and mouse brains. PERK activation induces apoptosis via the PERK-ATF4-CHOP apoptosis pathway upon JEV infection. Among the JEV proteins prM, E, NS1, NS2A, NS2B, and NS4B, only NS4B activates PERK. Moreover, activated PERK participates in apoptosis and encephalitis induced by JEV and NS4B. These findings provide a novel therapeutic approach for JEV-caused encephalitis.
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15
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Romine IC, Wiseman RL. PERK Signaling Regulates Extracellular Proteostasis of an Amyloidogenic Protein During Endoplasmic Reticulum Stress. Sci Rep 2019; 9:410. [PMID: 30675021 PMCID: PMC6344643 DOI: 10.1038/s41598-018-37207-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 11/28/2018] [Indexed: 11/08/2022] Open
Abstract
The PERK arm of the unfolded protein response (UPR) regulates cellular proteostasis and survival in response to endoplasmic reticulum (ER) stress. However, the impact of PERK signaling on extracellular proteostasis is poorly understood. We define how PERK signaling influences extracellular proteostasis during ER stress using a conformational reporter of the secreted amyloidogenic protein transthyretin (TTR). We show that inhibiting PERK signaling impairs secretion of destabilized TTR during thapsigargin (Tg)-induced ER stress by increasing its ER retention in chaperone-bound complexes. Interestingly, PERK inhibition increases the ER stress-dependent secretion of TTR in non-native conformations that accumulate extracellularly as soluble oligomers. Pharmacologic or genetic TTR stabilization partially restores secretion of native TTR tetramers. However, PERK inhibition still increases the ER stress-dependent secretion of TTR in non-native conformations under these conditions, indicating that the conformation of stable secreted proteins can also be affected by inhibiting PERK. Our results define a role for PERK in regulating extracellular proteostasis during ER stress and indicate that genetic or aging-related alterations in PERK signaling can exacerbate ER stress-related imbalances in extracellular proteostasis implicated in diverse diseases.
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Affiliation(s)
- Isabelle C Romine
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - R Luke Wiseman
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA.
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16
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Different Forms of ER Stress in Chondrocytes Result in Short Stature Disorders and Degenerative Cartilage Diseases: New Insights by Cartilage-Specific ERp57 Knockout Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:8421394. [PMID: 30647818 PMCID: PMC6311764 DOI: 10.1155/2018/8421394] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/13/2018] [Indexed: 02/06/2023]
Abstract
Cartilage is essential for skeletal development by endochondral ossification. The only cell type within the tissue, the chondrocyte, is responsible for the production of macromolecules for the extracellular matrix (ECM). Before proteins and proteoglycans are secreted, they undergo posttranslational modification and folding in the endoplasmic reticulum (ER). However, the ER folding capacity in the chondrocytes has to be balanced with physiological parameters like energy and oxygen levels. Specific cellular conditions, e.g., a high protein demand, or pathologic situations disrupt ER homeostasis and lead to the accumulation of poorly folded or misfolded proteins. This state is called ER stress and induces a cellular quality control system, the unfolded protein response (UPR), to restore homeostasis. Different mouse models with ER stress in chondrocytes display comparable skeletal phenotypes representing chondrodysplasias. Therefore, ER stress itself seems to be involved in the pathogenesis of these diseases. It is remarkable that chondrodysplasias with a comparable phenotype arise independent from the sources of ER stress, which are as follows: (1) mutations in ECM proteins leading to aggregation, (2) deficiencies in ER chaperones, (3) mutations in UPR signaling factors, or (4) deficiencies in the degradation of aggregated proteins. In any case, the resulting UPR substantially impairs ECM protein synthesis, chondrocyte proliferation, and/or differentiation or regulation of autophagy and apoptosis. Notably, chondrodysplasias arise no matter if single or multiple events are affected. We analyzed cartilage-specific ERp57 knockout mice and demonstrated that the deficiency of this single protein disulfide isomerase, which is responsible for formation of disulfide bridges in ECM glycoproteins, is sufficient to induce ER stress and to cause an ER stress-related bone phenotype. These mice therefore qualify as a novel model for the analysis of ER stress in chondrocytes. They give new insights in ER stress-related short stature disorders and enable the analysis of ER stress in other cartilage diseases, such as osteoarthritis.
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