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Rawat S, Chatterjee D, Marwaha R, Charak G, Kumar G, Shaw S, Khatter D, Sharma S, de Heus C, Liv N, Klumperman J, Tuli A, Sharma M. RUFY1 binds Arl8b and mediates endosome-to-TGN CI-M6PR retrieval for cargo sorting to lysosomes. J Cell Biol 2023; 222:e202108001. [PMID: 36282215 PMCID: PMC9597352 DOI: 10.1083/jcb.202108001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 08/26/2022] [Accepted: 09/29/2022] [Indexed: 11/22/2022] Open
Abstract
Arl8b, an Arf-like GTP-binding protein, regulates cargo trafficking and positioning of lysosomes. However, it is unknown whether Arl8b regulates lysosomal cargo sorting. Here, we report that Arl8b binds to the Rab4 and Rab14 interaction partner, RUN and FYVE domain-containing protein (RUFY) 1, a known regulator of cargo sorting from recycling endosomes. Arl8b determines RUFY1 endosomal localization through regulating its interaction with Rab14. RUFY1 depletion led to a delay in CI-M6PR retrieval from endosomes to the TGN, resulting in impaired delivery of newly synthesized hydrolases to lysosomes. We identified the dynein-dynactin complex as an RUFY1 interaction partner, and similar to a subset of activating dynein adaptors, the coiled-coil region of RUFY1 was required for interaction with dynein and the ability to mediate dynein-dependent organelle clustering. Our findings suggest that Arl8b and RUFY1 play a novel role on recycling endosomes, from where this machinery regulates endosomes to TGN retrieval of CI-M6PR and, consequently, lysosomal cargo sorting.
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Affiliation(s)
- Shalini Rawat
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali (IISERM), Punjab, India
| | - Dhruba Chatterjee
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali (IISERM), Punjab, India
| | - Rituraj Marwaha
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali (IISERM), Punjab, India
| | - Gitanjali Charak
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali (IISERM), Punjab, India
| | - Gaurav Kumar
- Division of Cell Biology and Immunology, CSIR-Institute of Microbial Technology (IMTECH), Chandigarh, India
| | - Shrestha Shaw
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali (IISERM), Punjab, India
| | - Divya Khatter
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali (IISERM), Punjab, India
| | - Sheetal Sharma
- Division of Cell Biology and Immunology, CSIR-Institute of Microbial Technology (IMTECH), Chandigarh, India
| | - Cecilia de Heus
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht, Netherlands
| | - Nalan Liv
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht, Netherlands
| | - Judith Klumperman
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht, Netherlands
| | - Amit Tuli
- Division of Cell Biology and Immunology, CSIR-Institute of Microbial Technology (IMTECH), Chandigarh, India
| | - Mahak Sharma
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali (IISERM), Punjab, India
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Angarita FA, Oshi M, Yamada A, Yan L, Matsuyama R, Edge SB, Endo I, Takabe K. Low RUFY3 expression level is associated with lymph node metastasis in older women with invasive breast cancer. Breast Cancer Res Treat 2022; 192:19-32. [PMID: 35018543 PMCID: PMC8844209 DOI: 10.1007/s10549-021-06482-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 12/03/2021] [Indexed: 02/03/2023]
Abstract
PURPOSE Sentinel lymph node biopsy is omitted in older women (≥ 70 years old) with clinical lymph node (LN)-negative hormone receptor-positive breast cancer as it does not influence adjuvant treatment decision-making. However, older women are heterogeneous in frailty while the chance of recurrence increase with improving longevity. Therefore, a biomarker that identifies LN metastasis may facilitate treatment decision-making. RUFY3 is associated with cancer progression. We evaluated RUFY3 expression level as a biomarker for LN-positive breast cancer in older women. METHODS Clinical and transcriptomic data of breast cancer patients were obtained from the Molecular Taxonomy of Breast Cancer International Consortium (METABRIC, n = 1903) and The Cancer Genome Atlas (TCGA, n = 1046) Pan-cancer study cohorts. RESULTS A total of 510 (METABRIC) and 211 (TCGA) older women were identified. LN-positive breast cancer, which represented 51.4% (METABRIC) and 48.4% (TCGA), demonstrated worse disease-free, disease-specific, and overall survival. RUFY3 levels were significantly lower in LN-positive tumors regardless of age. The area under the curve for the receiver operator characteristic (AUC-ROC) curves showed RUFY3-predicted LN metastasis. Low RUFY3 enriched oxidative phosphorylation, DNA repair, MYC targets, unfolded protein response, and mtorc1 signaling gene sets, was associated with T helper type 1 cell infiltration, and with intratumor heterogeneity and fraction altered. Low RUFY3 expression was associated with LN-positive breast cancer and with worse disease-specific survival among older women. CONCLUSION Older women with breast cancers who had low expression level of RUFY3 were more frequently diagnosed with LN-positive tumors, which translated into worse prognosis.
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Affiliation(s)
- Fernando A. Angarita
- Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA
| | - Masanori Oshi
- Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA;,Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Akimitsu Yamada
- Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Li Yan
- Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA
| | - Ryusei Matsuyama
- Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Stephen B. Edge
- Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA;,Department of Surgery, Jacobs School of Medicine and Biomedical Sciences, State University of New York, Buffalo, New York, USA
| | - Itaru Endo
- Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Kazuaki Takabe
- Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA;,Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan;,Department of Surgery, Jacobs School of Medicine and Biomedical Sciences, State University of New York, Buffalo, New York, USA;,Department of Breast Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan;,Department of Breast Surgery and Oncology, Tokyo Medical University, Tokyo, Japan
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3
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Shin J, Nile A, Oh JW. Role of adaptin protein complexes in intracellular trafficking and their impact on diseases. Bioengineered 2021; 12:8259-8278. [PMID: 34565296 PMCID: PMC8806629 DOI: 10.1080/21655979.2021.1982846] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 09/15/2021] [Accepted: 09/15/2021] [Indexed: 02/07/2023] Open
Abstract
Adaptin proteins (APs) play a crucial role in intracellular cell trafficking. The 'classical' role of APs is carried out by AP1‒3, which bind to clathrin, cargo, and accessory proteins. Accordingly, AP1-3 are crucial for both vesicle formation and sorting. All APs consist of four subunits that are indispensable for their functions. In fact, based on studies using cells, model organism knockdown/knock-out, and human variants, each subunit plays crucial roles and contributes to the specificity of each AP. These studies also revealed that the sorting and intracellular trafficking function of AP can exert varying effects on pathology by controlling features such as cell development, signal transduction related to the apoptosis and proliferation pathways in cancer cells, organelle integrity, receptor presentation, and viral infection. Although the roles and functions of AP1‒3 are relatively well studied, the functions of the less abundant and more recently identified APs, AP4 and AP5, are still to be investigated. Further studies on these APs may enable a better understanding and targeting of specific diseases.APs known or suggested locations and functions.
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Affiliation(s)
- Juhyun Shin
- Department of Stem Cell and Regenerative Biotechnology and Animal Resources Research Center, Konkuk University, Seoul, Republic of Korea
| | - Arti Nile
- Department of Stem Cell and Regenerative Biotechnology and Animal Resources Research Center, Konkuk University, Seoul, Republic of Korea
| | - Jae-Wook Oh
- Department of Stem Cell and Regenerative Biotechnology and Animal Resources Research Center, Konkuk University, Seoul, Republic of Korea
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Char R, Pierre P. The RUFYs, a Family of Effector Proteins Involved in Intracellular Trafficking and Cytoskeleton Dynamics. Front Cell Dev Biol 2020; 8:779. [PMID: 32850870 PMCID: PMC7431699 DOI: 10.3389/fcell.2020.00779] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 07/24/2020] [Indexed: 12/12/2022] Open
Abstract
Intracellular trafficking is essential for cell structure and function. In order to perform key tasks such as phagocytosis, secretion or migration, cells must coordinate their intracellular trafficking, and cytoskeleton dynamics. This relies on certain classes of proteins endowed with specialized and conserved domains that bridge membranes with effector proteins. Of particular interest are proteins capable of interacting with membrane subdomains enriched in specific phosphatidylinositol lipids, tightly regulated by various kinases and phosphatases. Here, we focus on the poorly studied RUFY family of adaptor proteins, characterized by a RUN domain, which interacts with small GTP-binding proteins, and a FYVE domain, involved in the recognition of phosphatidylinositol 3-phosphate. We report recent findings on this protein family that regulates endosomal trafficking, cell migration and upon dysfunction, can lead to severe pathology at the organismal level.
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Affiliation(s)
- Rémy Char
- Aix Marseille Université, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Philippe Pierre
- Aix Marseille Université, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Centre d'Immunologie de Marseille-Luminy, Marseille, France.,Institute for Research in Biomedicine and Ilidio Pinho Foundation, Department of Medical Sciences, University of Aveiro, Aveiro, Portugal.,Shanghai Institute of Immunology, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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5
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Trivedi PC, Bartlett JJ, Pulinilkunnil T. Lysosomal Biology and Function: Modern View of Cellular Debris Bin. Cells 2020; 9:cells9051131. [PMID: 32375321 PMCID: PMC7290337 DOI: 10.3390/cells9051131] [Citation(s) in RCA: 107] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 04/27/2020] [Accepted: 04/29/2020] [Indexed: 02/07/2023] Open
Abstract
Lysosomes are the main proteolytic compartments of mammalian cells comprising of a battery of hydrolases. Lysosomes dispose and recycle extracellular or intracellular macromolecules by fusing with endosomes or autophagosomes through specific waste clearance processes such as chaperone-mediated autophagy or microautophagy. The proteolytic end product is transported out of lysosomes via transporters or vesicular membrane trafficking. Recent studies have demonstrated lysosomes as a signaling node which sense, adapt and respond to changes in substrate metabolism to maintain cellular function. Lysosomal dysfunction not only influence pathways mediating membrane trafficking that culminate in the lysosome but also govern metabolic and signaling processes regulating protein sorting and targeting. In this review, we describe the current knowledge of lysosome in influencing sorting and nutrient signaling. We further present a mechanistic overview of intra-lysosomal processes, along with extra-lysosomal processes, governing lysosomal fusion and fission, exocytosis, positioning and membrane contact site formation. This review compiles existing knowledge in the field of lysosomal biology by describing various lysosomal events necessary to maintain cellular homeostasis facilitating development of therapies maintaining lysosomal function.
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Affiliation(s)
- Purvi C. Trivedi
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4H7, Canada; (P.C.T.); (J.J.B.)
- Dalhousie Medicine New Brunswick, Saint John, NB E2L 4L5, Canada
| | - Jordan J. Bartlett
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4H7, Canada; (P.C.T.); (J.J.B.)
- Dalhousie Medicine New Brunswick, Saint John, NB E2L 4L5, Canada
| | - Thomas Pulinilkunnil
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4H7, Canada; (P.C.T.); (J.J.B.)
- Dalhousie Medicine New Brunswick, Saint John, NB E2L 4L5, Canada
- Correspondence: ; Tel.: +1-(506)-636-6973
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6
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Men W, Li W, Li Y, Zhao J, Qu X, Li P, Gong S. RUFY3 Predicts Poor Prognosis and Promotes Metastasis through Epithelial-mesenchymal Transition in Lung Adenocarcinoma. J Cancer 2019; 10:6278-6285. [PMID: 31772661 PMCID: PMC6856751 DOI: 10.7150/jca.35072] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 09/01/2019] [Indexed: 01/24/2023] Open
Abstract
Background: RUFY3 (RUN and FYVE domain-containing protein 3) has been shown to participate in cell migration, membrane transportation, and cellular signaling and is dysregulated in several cancer processes. However, the role of RUFY3 in lung cancer remains unclear. In the present study, we aimed to study the expression of RUFY3 and assess its clinical significance in lung adenocarcinoma. Materials and Methods: We used immunohistochemistry to detect RUFY3 protein expression in human lung adenocarcinoma and adjacent normal lung tissue from 125 patients who underwent surgical resection of the lung cancer. RUFY3 expression was assessed in association with clinicopathological characteristics and clinical prognosis of lung adenocarcinoma patients. The expression of RUFY3 in three different lung adenocarcinoma cell lines and one normal lung epithelial cell (BEAS-2B) was detected by western blot. RNAi technique was used to silence RUFY3. We assessed cell migration by Trans-well assay and wound healing assay. Results: In lung adenocarcinoma tissues, RUFY3 protein was significantly upregulated compared to paired normal lung tissues. High cytoplasmic RUFY3 levels were associated with lymph node metastasis, TNM staging, and survival status. Patients with the highest expression level of RUFY3 had a shorter survival time than patients with the lowest expression. Inhibition of RUFY3 by siRNA inhibited cell migration. Furthermore, silence of RUFY3 lead to up-regulation of E-cadherin, but down-regulation of N-cadherin, Vimentin and Slug. Conclusions: Our study is first to demonstrated that abnormal expression of RUFY3 indicates poor prognosis in lung adenocarcinoma and also indicates that RUFY3 may be related to EMT process. This highlights the potential of RUFY3 as a novel prognostic biomarker for lung adenocarcinoma.
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Affiliation(s)
- Wanfu Men
- Department of Thoracic Surgery, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Wenya Li
- Department of Thoracic Surgery, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Yu Li
- Department of Thoracic Surgery, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Jungang Zhao
- Department of Thoracic Surgery, Shenjing Affiliated Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Xiaohan Qu
- Department of Thoracic Surgery, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Peiwen Li
- Department of Thoracic Surgery, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Shulei Gong
- Department of Thoracic Surgery, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
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7
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Zhi Q, Chen H, Liu F, Han Y, Wan D, Xu Z, Kuang Y, Zhou J. Podocalyxin-like protein promotes gastric cancer progression through interacting with RUN and FYVE domain containing 1 protein. Cancer Sci 2018; 110:118-134. [PMID: 30407695 PMCID: PMC6317940 DOI: 10.1111/cas.13864] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 10/31/2018] [Accepted: 11/03/2018] [Indexed: 12/13/2022] Open
Abstract
Podocalyxin‐like protein (PODXL), a transmembrane glycoprotein with anti‐adhesive properties, is associated with an aggressive tumor phenotype and poor prognosis of several cancers. To elucidate the biological significance of PODXL and its molecular mechanism in gastric cancer (GC), we investigated the expression of PODXL in GC samples and assessed its effects on biological behaviors and the related signaling pathways in vitro and in vivo. Moreover, the possible and closely interacted partners of PODXL were identified. Our data showed that the protein or mRNA level of PODXL was significantly upregulated in tissues or serum of GC patients compared with normal‐appearing tissues (NAT) or those of healthy volunteers. Overall survival (OS) curves showed that patients with high PODXL levels in tissues or serum had a worse 5‐year OS. In vitro, restoring PODXL expression promoted tumor progression by increasing cell proliferation, colony formation, wound healing, migration and invasion, as well as suppressing the apoptosis. Furthermore, the PI3K/AKT, NF‐κB and MAPK/ERK signaling pathways were activated. There was a significant positive correlation between PODXL and RUN and FYVE domain containing 1 (RUFY1) expression in tissues or serum. Subsequent mass spectrometry analysis, co‐immunoprecipitation assays and western blot analysis identified PODXL/RUFY1 complexes in GC cells, and silencing RUFY1 expression in GC cells significantly attenuated PODXL‐induced phenotypes and their underlying signaling pathways. Our results suggested that PODXL promoted GC progression via a RUFY1‐dependent signaling mechanism. New GC therapeutic opportunities through PODXL and targeting the PODXL/RUFY1 complex might improve cancer therapy.
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Affiliation(s)
- Qiaoming Zhi
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Huo Chen
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Fei Liu
- Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Ye Han
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Daiwei Wan
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Zhihua Xu
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Yuting Kuang
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Jin Zhou
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
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8
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Nag S, Rani S, Mahanty S, Bissig C, Arora P, Azevedo C, Saiardi A, van der Sluijs P, Delevoye C, van Niel G, Raposo G, Setty SRG. Rab4A organizes endosomal domains for sorting cargo to lysosome-related organelles. J Cell Sci 2018; 131:jcs.216226. [PMID: 30154210 PMCID: PMC6151265 DOI: 10.1242/jcs.216226] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 08/08/2018] [Indexed: 12/13/2022] Open
Abstract
Sorting endosomes (SEs) are the regulatory hubs for sorting cargo to multiple organelles, including lysosome-related organelles, such as melanosomes in melanocytes. In parallel, melanosome biogenesis is initiated from SEs with the processing and sequential transport of melanocyte-specific proteins toward maturing melanosomes. However, the mechanism of cargo segregation on SEs is largely unknown. Here, RNAi screening in melanocytes revealed that knockdown of Rab4A results in defective melanosome maturation. Rab4A-depletion increases the number of vacuolar endosomes and disturbs the cargo sorting, which in turn lead to the mislocalization of melanosomal proteins to lysosomes, cell surface and exosomes. Rab4A localizes to the SEs and forms an endosomal complex with the adaptor AP-3, the effector rabenosyn-5 and the motor KIF3, which possibly coordinates cargo segregation on SEs. Consistent with this, inactivation of rabenosyn-5, KIF3A or KIF3B phenocopied the defects observed in Rab4A-knockdown melanocytes. Further, rabenosyn-5 was found to associate with rabaptin-5 or Rabip4/4' (isoforms encoded by Rufy1) and differentially regulate cargo sorting from SEs. Thus, Rab4A acts a key regulator of cargo segregation on SEs.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Sudeshna Nag
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India 560 012
| | - Shikha Rani
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India 560 012
| | - Sarmistha Mahanty
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India 560 012
| | - Christin Bissig
- Institut Curie, PSL Research University, CNRS, UMR 144, Structure and Membrane Compartments, F-75005, Paris, France
| | - Pooja Arora
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India 560 012
| | - Cristina Azevedo
- Medical Research Council Laboratory for Molecular Cell Biology, University College London, Gower Street, London, WC1E 6BT, UK
| | - Adolfo Saiardi
- Medical Research Council Laboratory for Molecular Cell Biology, University College London, Gower Street, London, WC1E 6BT, UK
| | - Peter van der Sluijs
- Cellular Protein Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, 3584 CH Utrecht, The Netherlands
| | - Cedric Delevoye
- Institut Curie, PSL Research University, CNRS, UMR 144, Structure and Membrane Compartments, F-75005, Paris, France.,Institut Curie, PSL Research University, CNRS, UMR144, Cell and Tissue Imaging Facility (PICT-IBiSA), F-75005, Paris, France
| | - Guillaume van Niel
- Institut Curie, PSL Research University, CNRS, UMR 144, Structure and Membrane Compartments, F-75005, Paris, France.,Institut Curie, PSL Research University, CNRS, UMR144, Cell and Tissue Imaging Facility (PICT-IBiSA), F-75005, Paris, France
| | - Graca Raposo
- Institut Curie, PSL Research University, CNRS, UMR 144, Structure and Membrane Compartments, F-75005, Paris, France.,Institut Curie, PSL Research University, CNRS, UMR144, Cell and Tissue Imaging Facility (PICT-IBiSA), F-75005, Paris, France
| | - Subba Rao Gangi Setty
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India 560 012
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Tamošaitis L, Smales CM. Meta-Analysis of Publicly Available Chinese Hamster Ovary (CHO) Cell Transcriptomic Datasets for Identifying Engineering Targets to Enhance Recombinant Protein Yields. Biotechnol J 2018; 13:e1800066. [DOI: 10.1002/biot.201800066] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 05/23/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Linas Tamošaitis
- Industrial Biotechnology Centre and School of Biosciences; University of Kent; Canterbury Kent CT2 7NJ UK
| | - Christopher Mark Smales
- Industrial Biotechnology Centre and School of Biosciences; University of Kent; Canterbury Kent CT2 7NJ UK
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10
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Shi L, Hines T, Bergson C, Smith D. Coupling of microtubule motors with AP-3 generated organelles in axons by NEEP21 family member calcyon. Mol Biol Cell 2018; 29:2055-2068. [PMID: 29949458 PMCID: PMC6232961 DOI: 10.1091/mbc.e18-01-0007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Transport of late endosomes and lysosome-related organelles (LE/LROs) in axons is essential for supplying synaptic cargoes and for removing damaged macromolecules. Defects in this system are implicated in a range of human neurodegenerative and neurodevelopmental disorders. The findings reported here identify a novel mechanism regulating LE/LRO transport based on the coordinated coupling of microtubule motors and vesicle coat proteins to the neuron-enriched, transmembrane protein calcyon (Caly). We found that the cytoplasmic C-terminus of Caly pulled down proteins involved in microtubule-dependent transport (DIC, KIF5A, p150Glued, Lis1) and organelle biogenesis (AP-1 and AP-3) from the brain. In addition, RNA interference-mediated knockdown of Caly increased the percentage of static LE/LROs labeled by LysoTracker in cultured dorsal root ganglion axons. In contrast, overexpression of Caly stimulated movement of organelles positive for LysoTracker or the AP-3 cargo GFP-PI4KIIα. However, a Caly mutant (ATEA) that does not bind AP-3 was unable to pull down motor proteins from brain, and expression of the ATEA mutant failed to increase either LE/LRO flux or levels of associated dynein. Taken together, these data support the hypothesis that Caly is a multifunctional scaffolding protein that regulates axonal transport of LE/LROs by coordinately interacting with motor and vesicle coat proteins.
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Affiliation(s)
- Liang Shi
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912
| | - Timothy Hines
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208
| | - Clare Bergson
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912
| | - Deanna Smith
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208
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11
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Mantegazza AR, Wynosky-Dolfi MA, Casson CN, Lefkovith AJ, Shin S, Brodsky IE, Marks MS. Increased autophagic sequestration in adaptor protein-3 deficient dendritic cells limits inflammasome activity and impairs antibacterial immunity. PLoS Pathog 2017; 13:e1006785. [PMID: 29253868 PMCID: PMC5749898 DOI: 10.1371/journal.ppat.1006785] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 01/02/2018] [Accepted: 12/01/2017] [Indexed: 12/17/2022] Open
Abstract
Bacterial pathogens that compromise phagosomal membranes stimulate inflammasome assembly in the cytosol, but the molecular mechanisms by which membrane dynamics regulate inflammasome activity are poorly characterized. We show that in murine dendritic cells (DCs), the endosomal adaptor protein AP-3 –which optimizes toll-like receptor signaling from phagosomes–sustains inflammasome activation by particulate stimuli. AP-3 independently regulates inflammasome positioning and autophagy induction, together resulting in delayed inflammasome inactivation by autophagy in response to Salmonella Typhimurium (STm) and other particulate stimuli specifically in DCs. AP-3-deficient DCs, but not macrophages, hyposecrete IL-1β and IL-18 in response to particulate stimuli in vitro, but caspase-1 and IL-1β levels are restored by silencing autophagy. Concomitantly, AP-3-deficient mice exhibit higher mortality and produce less IL-1β, IL-18, and IL-17 than controls upon oral STm infection. Our data identify a novel link between phagocytosis, inflammasome activity and autophagy in DCs, potentially explaining impaired antibacterial immunity in AP-3-deficient patients. Bacterial uptake by phagocytic cells such as dendritic cells (DCs) stimulates signaling from membrane-bound toll-like receptors (TLRs) to shape adaptive immune responses. Pathogenic bacteria that damage phagocytic membranes additionally stimulate the cytoplasmic inflammasome, producing the highly inflammatory cytokines IL-1β and IL-18. Host molecular mechanisms that link phagosomal signaling to inflammasome regulation are poorly characterized. We show that in DCs, the endosomal adaptor protein-3 (AP-3) complex optimizes phagocytosis-induced inflammasome activity by two mechanisms: AP-3 promotes TLR signaling-dependent transcription of inflammasome components and antagonizes autophagy-dependent inflammasome silencing. Consequently, AP-3 deficient DCs hyposecrete IL-1β and IL-18 in response to phagocytosed stimuli, and AP-3 deficient mice succumb to infection by a bacterial pathogen. AP-3 thus links phagosome signaling, inflammasome activity and autophagy in DCs.
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Affiliation(s)
- Adriana R. Mantegazza
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States of America
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
- * E-mail: (ARM); (MSM)
| | - Meghan A. Wynosky-Dolfi
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
| | - Cierra N. Casson
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
| | - Ariel J. Lefkovith
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States of America
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
| | - Sunny Shin
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
| | - Igor E. Brodsky
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
| | - Michael S. Marks
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States of America
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
- * E-mail: (ARM); (MSM)
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12
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Abstract
RUFY3 is highly expressed in brain tissue and has a role in neuronal development. Transcriptional factor FOXK1 is involved in cell growth and metabolism. We knew that RUFY3 or FOXK1 has been correlated with the malignant of tumor cells. However, the role of these molecules in colorectal cancer (CRC) progression remains unknown. We investigated the protein expression levels by Western blot, immunofluorescence and immunohistochemistry analyses. The migration and invasive abilities of CRC cells were assessed using shRNA-mediated inhibition in vitro and in vivo. We showed that RUFY3 expression was up-regulated in CRC compared with its expression in a normal human colon cell line (FHC). RUFY3 suppression inhibited anchorage independent cell tumorigenesis. RUFY3 induced elevated expression of eight major oncogenes. Moreover, RUFY3 physically interacts with FOXK1 in CRC. A positive correlation was observed between the expression patterns of RUFY3 and FOXK1. Furthermore, RUFY3 and FOXK1 expression were correlated with tumor progression and represented significant predictors of overall survival in CRC patients. SiRNA-mediated repression of FOXK1 in RUFY3-overexpressing cells reversed the epithelial-mesenchymal transition (EMT) and metastatic phenotypes. In vivo, FOXK1 promoted RUFY3-mediated metastasis via orthotopic implantation. These findings suggest that the RUFY3-FOXK1 axis might promote the development and progression of human CRC.
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13
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Xie R, Wang J, Tang W, Li Y, Peng Y, Zhang H, Liu G, Huang X, Zhao J, Li A, Gong W, Chen Y, Ren Y, Wang Y, Li G, Liu S, Wang J. Rufy3 promotes metastasis through epithelial-mesenchymal transition in colorectal cancer. Cancer Lett 2017; 390:30-38. [PMID: 28089833 DOI: 10.1016/j.canlet.2017.01.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 12/13/2016] [Accepted: 01/04/2017] [Indexed: 12/13/2022]
Abstract
Rufy3 is a RUN domain-containing protein that has been associated with gastric cancers; however, the role of Rufy3 in the progression of colorectal cancer (CRC) remains unknown. We demonstrated that Rufy3 expression was higher in 11/12 fresh CRC tissues than in adjacent normal tissues. Rufy3 induced elevated expression and transactivity of four major oncogenes in CRC. Moreover, siRNA-mediated repression of Rufy3 induced G0/G1 cell cycle arrest, and Rufy3 overexpression enhanced CRC cell proliferation in vitro and in vivo. Furthermore, Rufy3 up-regulation promoted epithelial-mesenchymal transition (EMT) and metastatic phenotypes. Using an established in vitro cell model of 5-fluorouracil-resistant (5-FU) CRC cells, we assessed cellular morphology, molecular changes, and invasion and found that these characteristics were consistent with EMT. Silencing of Rufy3 by siRNA reversed EMT and greatly diminished the invasion of 5-FU-treated cells. In addition, TGF-β1 induced Rufy3 expression in a dose-dependent manner, and Rufy3 knockdown inhibited TGF-β1-induced EMT. In vivo, higher expression of Rufy3 promoted CRC cell invasion and metastasis and induced EMT. Taken together, this work identified that Rufy3 promoted cancer metastasis in CRC cells through EMT induction.
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Affiliation(s)
- Ruyi Xie
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jing Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Weimei Tang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yueqiao Li
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Ying Peng
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Hui Zhang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China; Department of Gastroenterology, Hexian Memorial Affiliated Hospital of Southern Medical University, Guangzhou, 511400, China
| | - Guangnan Liu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xiaoting Huang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jinjun Zhao
- Department of Rheumatism, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Aimin Li
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Wei Gong
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Ye Chen
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yuexin Ren
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yadong Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Guoxin Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Side Liu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
| | - Jide Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
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14
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Chen F, Duggal P, Klein BEK, Lee KE, Truitt B, Klein R, Iyengar SK, Klein AP. Variation in PTCHD2, CRISP3, NAP1L4, FSCB, and AP3B2 associated with spherical equivalent. Mol Vis 2016; 22:783-96. [PMID: 27440996 DOI: pmid/27440996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 07/12/2016] [Indexed: 11/10/2022] Open
Abstract
PURPOSE Ocular refraction is measured in spherical equivalent as the power of the external lens required to focus images on the retina. Myopia (nearsightedness) and hyperopia (farsightedness) are the most common refractive errors, and the leading causes of visual impairment and blindness in the world. The goal of this study is to identify rare and low-frequency variants that influence spherical equivalent. METHODS We conducted variant-level and gene-level quantitative trait association analyses for mean spherical equivalent, using data from 1,560 individuals in the Beaver Dam Eye Study. Genotyping was conducted using the Illumina exome array. We analyzed 34,976 single nucleotide variants and 11,571 autosomal genes across the genome, using single-variant tests as well as gene-based tests. RESULTS Spherical equivalent was significantly associated with five genes in gene-based analysis: PTCHD2 at 1p36.22 (p = 3.6 × 10(-7)), CRISP3 at 6p12.3 (p = 4.3 × 10(-6)), NAP1L4 at 11p15.5 (p = 3.6 × 10(-6)), FSCB at 14q21.2 (p = 1.5 × 10(-7)), and AP3B2 at 15q25.2 (p = 1.6 × 10(-7)). The variant-based tests identified evidence suggestive of association with two novel variants in linkage disequilibrium (pairwise r(2) = 0.80) in the TCTE1 gene region at 6p21.1 (rs2297336, minor allele frequency (MAF) = 14.1%, β = -0.62 p = 3.7 × 10(-6); rs324146, MAF = 16.9%, β = -0.55, p = 1.4 × 10(-5)). In addition to these novel findings, we successfully replicated a previously reported association with rs634990 near GJD2 at 15q14 (MAF = 47%, β = -0.29, p=1.8 × 10(-3)). We also found evidence of association with spherical equivalent on 2q37.1 in PRSS56 at rs1550094 (MAF = 31%, β = -0.33, p = 1.7 × 10(-3)), a region previously associated with myopia. CONCLUSIONS We identified several novel candidate genes that may play a role in the control of spherical equivalent. However, further studies are needed to replicate these findings. In addition, our results contribute to the increasing evidence that variation in the GJD2 and PRSS56 genes influence the development of refractive errors. Identifying that variation in these genes is associated with spherical equivalent may provide further insight into the etiology of myopia and consequent vision loss.
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Affiliation(s)
- Fei Chen
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Priya Duggal
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Barbara E K Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Kristine E Lee
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Barbara Truitt
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, OH
| | - Ronald Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Sudha K Iyengar
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, OH
| | - Alison P Klein
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD; Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
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15
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Hämälistö S, Jäättelä M. Lysosomes in cancer-living on the edge (of the cell). Curr Opin Cell Biol 2016; 39:69-76. [PMID: 26921697 DOI: 10.1016/j.ceb.2016.02.009] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/03/2016] [Accepted: 02/04/2016] [Indexed: 12/25/2022]
Abstract
The lysosomes have definitely polished their status inside the cell. Being discovered as the last resort of discarded cellular biomass, the steady rising of this versatile signaling organelle is currently ongoing. This review discusses the recent data on the unconventional functions of lysosomes, focusing mainly on the less studied lysosomes residing in the cellular periphery. We emphasize our discussion on the emerging paths the lysosomes have taken in promoting cancer progression to metastatic disease. Finally, we address how the altered cancerous lysosomes in metastatic cancers may be specifically targeted and what are the pending questions awaiting for elucidation.
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Affiliation(s)
- Saara Hämälistö
- Cell Death and Metabolism Unit, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Marja Jäättelä
- Cell Death and Metabolism Unit, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark.
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16
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Terawaki S, Camosseto V, Prete F, Wenger T, Papadopoulos A, Rondeau C, Combes A, Rodriguez Rodrigues C, Vu Manh TP, Fallet M, English L, Santamaria R, Soares AR, Weil T, Hammad H, Desjardins M, Gorvel JP, Santos MAS, Gatti E, Pierre P. RUN and FYVE domain-containing protein 4 enhances autophagy and lysosome tethering in response to Interleukin-4. J Cell Biol 2015; 210:1133-52. [PMID: 26416964 PMCID: PMC4586740 DOI: 10.1083/jcb.201501059] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Autophagy is a key degradative pathway coordinated by external cues, including starvation, oxidative stress, or pathogen detection. Rare are the molecules known to contribute mechanistically to the regulation of autophagy and expressed specifically in particular environmental contexts or in distinct cell types. Here, we unravel the role of RUN and FYVE domain-containing protein 4 (RUFY4) as a positive molecular regulator of macroautophagy in primary dendritic cells (DCs). We show that exposure to interleukin-4 (IL-4) during DC differentiation enhances autophagy flux through mTORC1 regulation and RUFY4 induction, which in turn actively promote LC3 degradation, Syntaxin 17-positive autophagosome formation, and lysosome tethering. Enhanced autophagy boosts endogenous antigen presentation by MHC II and allows host control of Brucella abortus replication in IL-4-treated DCs and in RUFY4-expressing cells. RUFY4 is therefore the first molecule characterized to date that promotes autophagy and influences endosome dynamics in a subset of immune cells.
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Affiliation(s)
- Seigo Terawaki
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Voahirana Camosseto
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Francesca Prete
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Till Wenger
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Alexia Papadopoulos
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Christiane Rondeau
- Département de pathologie et biologie cellulaire, Université de Montréal, Québec H3C 3J7, Canada
| | - Alexis Combes
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Christian Rodriguez Rodrigues
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Thien-Phong Vu Manh
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Mathieu Fallet
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Luc English
- Département de pathologie et biologie cellulaire, Université de Montréal, Québec H3C 3J7, Canada
| | - Rodrigo Santamaria
- Departamento de Informática y Automática, Universidad de Salamanca, 37008 Salamanca, Spain
| | - Ana R Soares
- RNA Biology Laboratory, Department of Biology and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal Institute for Research in Biomedicine (iBiMED), Aveiro Health Sciences Program, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Tobias Weil
- RNA Biology Laboratory, Department of Biology and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal
| | - Hamida Hammad
- Laboratory of Immunoregulation and Mucosal Immunology, Department for Molecular Biomedical Research, VIB, Ghent 9050, Belgium
| | - Michel Desjardins
- Département de pathologie et biologie cellulaire, Université de Montréal, Québec H3C 3J7, Canada Département de microbiologie, infectiologie, et immunologie, Université de Montréal, Québec H3C 3J7, Canada
| | - Jean-Pierre Gorvel
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France
| | - Manuel A S Santos
- RNA Biology Laboratory, Department of Biology and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal Institute for Research in Biomedicine (iBiMED), Aveiro Health Sciences Program, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Evelina Gatti
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France Institute for Research in Biomedicine (iBiMED), Aveiro Health Sciences Program, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Philippe Pierre
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université UM2, Institut National de la Santé et de la Recherche Médicale U1104, Centre National de la Recherche Scientifique UMR7280, 13288 Marseille, France Institute for Research in Biomedicine (iBiMED), Aveiro Health Sciences Program, University of Aveiro, 3810-193 Aveiro, Portugal
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17
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Ivan V, van der Sluijs P. Methods for analysis of AP-3/Rabin4' in regulation of lysosome distribution. Methods Mol Biol 2015; 1298:245-58. [PMID: 25800848 DOI: 10.1007/978-1-4939-2569-8_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The position of lysosomes in the cytoplasm is important for their ability to fuse with the plasma membrane and release of proteases that are involved in tissue remodeling. Motor-directed bidirectional transport along microtubules is a critical process determining the distribution of lysosomes. How lysosomes are tethered to microtubules is incompletely understood, but a role for small GTPases of rab and arl families has been documented. We recently found that the rab5 and rab4 effector rabip4' interacts with the adaptor complex AP-3 in a rab4-dependent manner on tubular endosomes. We here describe the assays that led to the identification of AP-3 as a rabip4' partner and the role of the complex in regulating the spatial distribution of lysosomes.
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Affiliation(s)
- Viorica Ivan
- Department of Molecular Cell Biology, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
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18
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Matrix proteins of Nipah and Hendra viruses interact with beta subunits of AP-3 complexes. J Virol 2014; 88:13099-110. [PMID: 25210190 DOI: 10.1128/jvi.02103-14] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
UNLABELLED Paramyxoviruses and other negative-strand RNA viruses encode matrix proteins that coordinate the virus assembly process. The matrix proteins link the viral glycoproteins and the viral ribonucleoproteins at virus assembly sites and often recruit host machinery that facilitates the budding process. Using a co-affinity purification strategy, we have identified the beta subunit of the AP-3 adapter protein complex, AP3B1, as a binding partner for the M proteins of the zoonotic paramyxoviruses Nipah virus and Hendra virus. Binding function was localized to the serine-rich and acidic Hinge domain of AP3B1, and a 29-amino-acid Hinge-derived polypeptide was sufficient for M protein binding in coimmunoprecipitation assays. Virus-like particle (VLP) production assays were used to assess the relationship between AP3B1 binding and M protein function. We found that for both Nipah virus and Hendra virus, M protein expression in the absence of any other viral proteins led to the efficient production of VLPs in transfected cells, and this VLP production was potently inhibited upon overexpression of short M-binding polypeptides derived from the Hinge region of AP3B1. Both human and bat (Pteropus alecto) AP3B1-derived polypeptides were highly effective at inhibiting the production of VLPs. VLP production was also impaired through small interfering RNA (siRNA)-mediated depletion of AP3B1 from cells. These findings suggest that AP-3-directed trafficking processes are important for henipavirus particle production and identify a new host protein-virus protein binding interface that could become a useful target in future efforts to develop small molecule inhibitors to combat paramyxoviral infections. IMPORTANCE Henipaviruses cause deadly infections in humans, with a mortality rate of about 40%. Hendra virus outbreaks in Australia, all involving horses and some involving transmission to humans, have been a continuing problem. Nipah virus caused a large outbreak in Malaysia in 1998, killing 109 people, and smaller outbreaks have since occurred in Bangladesh and India. In this study, we have defined, for the first time, host factors that interact with henipavirus M proteins and contribute to viral particle assembly. We have also defined a new host protein-viral protein binding interface that can potentially be targeted for the inhibition of paramyxovirus infections.
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19
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Granger E, McNee G, Allan V, Woodman P. The role of the cytoskeleton and molecular motors in endosomal dynamics. Semin Cell Dev Biol 2014; 31:20-9. [PMID: 24727350 PMCID: PMC4071412 DOI: 10.1016/j.semcdb.2014.04.011] [Citation(s) in RCA: 176] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 04/01/2014] [Accepted: 04/03/2014] [Indexed: 12/28/2022]
Abstract
The endocytic pathway is essential for processes that define how cells interact with their environment, including receptor signalling, cell adhesion and migration, pathogen entry, membrane protein turnover and nutrient uptake. The spatial organisation of endocytic trafficking requires motor proteins that tether membranes or transport them along the actin and microtubule cytoskeletons. Microtubules, actin filaments and motor proteins also provide force to deform and assist in the scission of membranes, thereby facilitating endosomal sorting and the generation of transport intermediates.
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Affiliation(s)
- Elizabeth Granger
- Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK
| | - Gavin McNee
- Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK
| | - Victoria Allan
- Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK.
| | - Philip Woodman
- Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK.
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20
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Kasmapour B, Cai L, Gutierrez MG. Spatial distribution of phagolysosomes is independent of the regulation of lysosome position by Rab34. Int J Biochem Cell Biol 2013; 45:2057-65. [PMID: 23871933 DOI: 10.1016/j.biocel.2013.07.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 07/05/2013] [Accepted: 07/09/2013] [Indexed: 11/20/2022]
Abstract
Within a cell, the regulation of organelle positioning is considered to be critical in spatio-temporal responses. The position of late endocytic organelles (named here lysosomes for simplicity) is tightly controlled and has a functional impact on processes like endocytosis, phagocytosis and autophagocytosis. The cytoplasmic distribution profile of lysosomes can be easily determined in cells where the cytoplasm/nuclear ratio in a cross-section area is high. However, determining lysosomal position in cells with lower cytoplasm/nuclear ratio, such as macrophages is more challenging. Here, we describe a method that can be efficiently and accurately used to determine the position of organelles in macrophages using confocal microscopy in two-dimensional (2D) images. Using this approach in macrophages, we confirmed previous observations in epithelial cells that both changes in cytoplasmic pH and the levels of active Rab34 induced a re-distribution of lysosomes to the cell centre or periphery. Noteworthy is that this Rab34-dependent re-distribution of lysosomes did not significantly affect the spatial distribution profile of phagolysosomes in the cytoplasm. We conclude that although Rab34 regulates both lysosomal positioning and lysosome to phagosome fusion, the latter effect is not due to the regulation of the cytoplasmic accessibility of lysosomes to phagosomes by Rab34.
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Affiliation(s)
- Bahram Kasmapour
- Research Group Phagosome Biology, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig, Germany
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