1
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Wang PX, Wu SL, Ju JQ, Jiao L, Zou YJ, Zhang KH, Sun SC, Hu LL, Zheng XB. Benzo[a]pyrene exposure disrupts the organelle distribution and function of mouse oocytes. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 281:116630. [PMID: 38917590 DOI: 10.1016/j.ecoenv.2024.116630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/22/2024] [Accepted: 06/19/2024] [Indexed: 06/27/2024]
Abstract
Benzo[a]pyrene (BaP) is a polycyclic aromatic hydrocarbon compound that is generated during combustion processes, and is present in various substances such as foods, tobacco smoke, and burning emissions. BaP is extensively acknowledged as a highly carcinogenic substance to induce multiple forms of cancer, such as lung cancer, skin cancer, and stomach cancer. Recently it is shown to adversely affect the reproductive system. Nevertheless, the potential toxicity of BaP on oocyte quality remains unclear. In this study, we established a BaP exposure model via mouse oral gavage and found that BaP exposure resulted in a notable decrease in the ovarian weight, number of GV oocytes in ovarian, and oocyte maturation competence. BaP exposure caused ribosomal dysfunction, characterized by a decrease in the expression of RPS3 and HPG in oocytes. BaP exposure also caused abnormal distribution of the endoplasmic reticulum (ER) and induced ER stress, as indicated by increased expression of GRP78. Besides, the Golgi apparatus exhibited an abnormal localization pattern, which was confirmed by the GM130 localization. Disruption of vesicle transport processes was observed by the abnormal expression and localization of Rab10. Additionally, an enhanced lysosome and LC3 fluorescence intensity indicated the occurrence of protein degradation in oocytes. In summary, our results suggested that BaP exposure disrupted the distribution and functioning of organelles, consequently affecting the developmental competence of mouse oocytes.
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Affiliation(s)
- Peng-Xia Wang
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; Guangxi Zhuang Autonomous Region Engineering Research Center of Veterinary Biologics, Guangxi University, Nanning, 530004, China; Guangxi Key Laboratory of Animal Reproduction, Breeding and Disease Control, Guangxi University, Nanning 530004, China
| | - Si-Le Wu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jia-Qian Ju
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Le Jiao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuan-Jing Zou
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Kun-Huan Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Lin-Lin Hu
- Key Laboratory of Research on Clinical Molecular Diagnosis for High Incidence Diseases in Western Guangxi, Reproductive Medicine of Guangxi Medical and Health Key Discipline Construction Project, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China.
| | - Xi-Bang Zheng
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; Guangxi Zhuang Autonomous Region Engineering Research Center of Veterinary Biologics, Guangxi University, Nanning, 530004, China; Guangxi Key Laboratory of Animal Reproduction, Breeding and Disease Control, Guangxi University, Nanning 530004, China.
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2
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Zhu H, Sydor AM, Boddy KC, Coyaud E, Laurent EMN, Au A, Tan JMJ, Yan BR, Moffat J, Muise AM, Yip CM, Grinstein S, Raught B, Brumell JH. Salmonella exploits membrane reservoirs for invasion of host cells. Nat Commun 2024; 15:3120. [PMID: 38600106 PMCID: PMC11006906 DOI: 10.1038/s41467-024-47183-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 03/22/2024] [Indexed: 04/12/2024] Open
Abstract
Salmonella utilizes a type 3 secretion system to translocate virulence proteins (effectors) into host cells during infection1. The effectors modulate host cell machinery to drive uptake of the bacteria into vacuoles, where they can establish an intracellular replicative niche. A remarkable feature of Salmonella invasion is the formation of actin-rich protuberances (ruffles) on the host cell surface that contribute to bacterial uptake. However, the membrane source for ruffle formation and how these bacteria regulate membrane mobilization within host cells remains unclear. Here, we show that Salmonella exploits membrane reservoirs for the generation of invasion ruffles. The reservoirs are pre-existing tubular compartments associated with the plasma membrane (PM) and are formed through the activity of RAB10 GTPase. Under normal growth conditions, membrane reservoirs contribute to PM homeostasis and are preloaded with the exocyst subunit EXOC2. During Salmonella invasion, the bacterial effectors SipC, SopE2, and SopB recruit exocyst subunits from membrane reservoirs and other cellular compartments, thereby allowing exocyst complex assembly and membrane delivery required for bacterial uptake. Our findings reveal an important role for RAB10 in the establishment of membrane reservoirs and the mechanisms by which Salmonella can exploit these compartments during host cell invasion.
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Affiliation(s)
- Hongxian Zhu
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Andrew M Sydor
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada
| | - Kirsten C Boddy
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Etienne Coyaud
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
- Protéomique, Réponse Inflammatoire, Spectrométrie de Masse (PRISM)-U1192, Université de Lille, Inserm, CHU Lille, Lille, France
| | - Estelle M N Laurent
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
- Protéomique, Réponse Inflammatoire, Spectrométrie de Masse (PRISM)-U1192, Université de Lille, Inserm, CHU Lille, Lille, France
| | - Aaron Au
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - Joel M J Tan
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada
| | - Bing-Ru Yan
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada
| | - Jason Moffat
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada
- Genetics and Genome Biology Program, Hospital for Sick Children, Toronto, ON, Canada
| | - Aleixo M Muise
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Hospital for Sick Children, Toronto, ON, Canada
- SickKids IBD Centre, Hospital for Sick Children, Toronto, ON, Canada
| | - Christopher M Yip
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - Sergio Grinstein
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - Brian Raught
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - John H Brumell
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada.
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada.
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada.
- SickKids IBD Centre, Hospital for Sick Children, Toronto, ON, Canada.
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3
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Cheng X, Wu C, Xu H, Zou R, Li T, Ye S. miR-557 inhibits hepatocellular carcinoma progression through Wnt/β-catenin signaling pathway by targeting RAB10. Aging (Albany NY) 2024; 16:3716-3733. [PMID: 38364252 PMCID: PMC10929814 DOI: 10.18632/aging.205554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 12/26/2023] [Indexed: 02/18/2024]
Abstract
Accumulating evidence suggests that aberrant miRNAs participate in carcinogenesis and progression of hepatocellular carcinoma (HCC). Abnormal miR-557 expression is reported to interfere with the progression of several human cancers. However, the potential roles of miR-557 in HCC remain largely unknown. In the current study, we found that miR-557 was down-regulated in HCC tissues and cell lines, and was closely related to recurrence and metastasis of HCC. Notably, overexpression of miR-557 inhibited proliferation, migration, invasion, epithelial-to-mesenchymal transition (EMT) progression, blocked cells in G0/G1 phase of MHCC-97H cells in vitro, and suppressed tumor growth in vivo. However, loss of miR-557 facilitated these parameters in Huh7 cells both in vitro and in vivo. Moreover, RAB10 was identified as a direct downstream target of miR-557 through its 3'-UTR. Furthermore, RAB10 re-expression or knockdown partially abolished the effects of miR-557 on proliferation, migration, invasion, and EMT progression of HCC cells. Mechanistically, overexpression of miR-557 suppressed Wnt/β-catenin signaling by inhibiting GSK-3β phosphorylation, increasing β-catenin phosphorylation, and decreasing β-catenin transport to the nucleus, while knockdown of miR-557 activated Wnt/β-catenin signaling. Moreover, the TOP/FOP-Flash reporter assays showed that miR-557 overexpression or knockdown significantly suppressed or activated Wnt signaling activity, respectively. Additionally, low expression of miR-557 and high expression of RAB10 in HCC tissues was closely associated with tumor size, degree of differentiation, TNM stage and poor prognosis in HCC patients. Taken together, these results demonstrate that miR-557 blocks the progression of HCC via the Wnt/β-catenin pathway by targeting RAB10.
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Affiliation(s)
- Xiaoye Cheng
- Department of Hematology, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Can Wu
- Department of General Surgery, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Haocheng Xu
- Department of General Surgery, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Ruixiang Zou
- Department of General Surgery, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Taiyuan Li
- Department of General Surgery, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Shanping Ye
- Department of General Surgery, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi Province, China
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Lapierre LA, Roland JT, Manning EH, Caldwell C, Glenn HL, Vidalain PO, Tangy F, Hogue BG, de Haan CAM, Goldenring JR. Coronavirus M Protein Trafficking in Epithelial Cells Utilizes a Myosin Vb Splice Variant and Rab10. Cells 2024; 13:126. [PMID: 38247817 PMCID: PMC10814003 DOI: 10.3390/cells13020126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 01/03/2024] [Accepted: 01/08/2024] [Indexed: 01/23/2024] Open
Abstract
The membrane (M) glycoprotein of coronaviruses (CoVs) serves as the nidus for virion assembly. Using a yeast two-hybrid screen, we identified the interaction of the cytosolic tail of Murine Hepatitis Virus (MHV-CoV) M protein with Myosin Vb (MYO5B), specifically with the alternative splice variant of cellular MYO5B including exon D (MYO5B+D), which mediates interaction with Rab10. When co-expressed in human lung epithelial A549 and canine kidney epithelial MDCK cells, MYO5B+D co-localized with the MHV-CoV M protein, as well as with the M proteins from Porcine Epidemic Diarrhea Virus (PEDV-CoV), Middle East Respiratory Syndrome (MERS-CoV) and Severe Acute Respiratory Syndrome 2 (SARS-CoV-2). Co-expressed M proteins and MYO5B+D co-localized with endogenous Rab10 and Rab11a. We identified point mutations in MHV-CoV M that blocked the interaction with MYO5B+D in yeast 2-hybrid assays. One of these point mutations (E121K) was previously shown to block MHV-CoV virion assembly and its interaction with MYO5B+D. The E to K mutation at homologous positions in PEDV-CoV, MERS-CoV and SARS-CoV-2 M proteins also blocked colocalization with MYO5B+D. The knockdown of Rab10 blocked the co-localization of M proteins with MYO5B+D and was rescued by re-expression of CFP-Rab10. Our results suggest that CoV M proteins traffic through Rab10-containing systems, in association with MYO5B+D.
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Affiliation(s)
- Lynne A. Lapierre
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, TN 37232, USA; (L.A.L.); (J.T.R.); (E.H.M.); (C.C.)
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
- Nashville VA Medical Center, Nashville, TN 37212, USA
| | - Joseph T. Roland
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, TN 37232, USA; (L.A.L.); (J.T.R.); (E.H.M.); (C.C.)
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Elizabeth H. Manning
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, TN 37232, USA; (L.A.L.); (J.T.R.); (E.H.M.); (C.C.)
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
- Nashville VA Medical Center, Nashville, TN 37212, USA
| | - Catherine Caldwell
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, TN 37232, USA; (L.A.L.); (J.T.R.); (E.H.M.); (C.C.)
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
- Nashville VA Medical Center, Nashville, TN 37212, USA
| | - Honor L. Glenn
- Biodesign Institute Center for Immunotherapy, Vaccines & Virotherapy, Tempe, AZ 85287, USA; (H.L.G.); (B.G.H.)
| | - Pierre-Olivier Vidalain
- Equipe Infections Virales, Métabolisme et Immunité, Centre International de Recherche en Infectiologie (CIRI), Univ. Lyon, INSERM U1111, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, 69008 Lyon, France;
- Unité Génomique Virale et Vaccination, Institut Pasteur, CNRS UMR3569, 75015 Paris, France
| | - Frederic Tangy
- Viral Genomics and Vaccination Unit, Department of Virology, Institut Pasteur, CNRS UMR3569, 75015 Paris, France;
| | - Brenda G. Hogue
- Biodesign Institute Center for Immunotherapy, Vaccines & Virotherapy, Tempe, AZ 85287, USA; (H.L.G.); (B.G.H.)
- Center for Applied Structural Discovery, Biodesign Institute, Tempe, AZ 85287, USA
- School of Life Sciences, Arizona State University, Phoenix, AZ 85004, USA
| | - C. A. M. de Haan
- Faculty of Veterinary Medicine, Department of Biomolecular Health Sciences, Division of Infectious Diseases and Immunology, Section Virology, University of Utrecht, 3584 CS Utrecht, The Netherlands;
| | - James R. Goldenring
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, TN 37232, USA; (L.A.L.); (J.T.R.); (E.H.M.); (C.C.)
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
- Nashville VA Medical Center, Nashville, TN 37212, USA
- Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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5
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Komori T, Kuwahara T. An Update on the Interplay between LRRK2, Rab GTPases and Parkinson's Disease. Biomolecules 2023; 13:1645. [PMID: 38002327 PMCID: PMC10669493 DOI: 10.3390/biom13111645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/10/2023] [Accepted: 11/11/2023] [Indexed: 11/26/2023] Open
Abstract
Over the last decades, research on the pathobiology of neurodegenerative diseases has greatly evolved, revealing potential targets and mechanisms linked to their pathogenesis. Parkinson's disease (PD) is no exception, and recent studies point to the involvement of endolysosomal defects in PD. The endolysosomal system, which tightly controls a flow of endocytosed vesicles targeted either for degradation or recycling, is regulated by a number of Rab GTPases. Their associations with leucine-rich repeat kinase 2 (LRRK2), a major causative and risk protein of PD, has also been one of the hot topics in the field. Understanding their interactions and functions is critical for unraveling their contribution to PD pathogenesis. In this review, we summarize recent studies on LRRK2 and Rab GTPases and attempt to provide more insight into the interaction of LRRK2 with each Rab and its relationship to PD.
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Affiliation(s)
| | - Tomoki Kuwahara
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
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Zhuo J, Han J, Zhao Y, Hao R, Shen C, Li H, Dai L, Sheng A, Yao H, Yang X, Liu W. RAB10 promotes breast cancer proliferation migration and invasion predicting a poor prognosis for breast cancer. Sci Rep 2023; 13:15252. [PMID: 37709911 PMCID: PMC10502149 DOI: 10.1038/s41598-023-42434-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 09/10/2023] [Indexed: 09/16/2023] Open
Abstract
RAB10, a member of the small GTPase family, has complex biological functions, but its role in breast cancer (BC) remains unclear. The aim of this study was to investigate the relationship between RAB10's role in BC, its biological functions, and BC prognosis. An online database was used to analyze the correlation between differential expression of RAB10 in BC and prognosis. The results of immunohistochemical assays in clinical cohorts were combined with the database analysis. The chi-square test and COX regression were employed to analyze the correlation between RAB10 and pathological features of BC. MTT, Transwell, and wound healing assays were conducted to detect BC cell proliferation, invasion, and metastatic ability. Bioinformatics techniques were employed to explore the correlation between RAB10 and BC tumor immune cell infiltration, and to speculate the biological function of RAB10 in BC and related signaling pathways. Our findings suggest that RAB10 expression is elevated in BC and is associated with HER2 status, indicating a poor prognosis for BC patients. RAB10 can promote the proliferation, migration, and invasion ability of BC cells in vitro. RAB10 is also associated with BC immune cell infiltration and interacts with multiple signaling pathways. RAB10 is a potential biomarker or molecular target for BC.
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Affiliation(s)
- Jian Zhuo
- School of Clinical Medicine, The Hebei University of Engineering, Handan, 056000, Hebei, China
| | - Jianjun Han
- Department of Breast Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, 056000, Hebei, China
| | - Yanchun Zhao
- Department of Outpatient, Affiliated Hospital of Hebei University of Engineering, Handan, 056000, Hebei, China
| | - Ruiying Hao
- School of Clinical Medicine, The Hebei University of Engineering, Handan, 056000, Hebei, China
| | - Chong Shen
- School of Clinical Medicine, The Hebei University of Engineering, Handan, 056000, Hebei, China
| | - He Li
- School of Clinical Medicine, The Hebei University of Engineering, Handan, 056000, Hebei, China
| | - Luxian Dai
- Department of Breast Surgery, Yangzhou Maternal and Child Health Hospital Affiliated to Yangzhou University Medica College, Yangzhou, 225007, Jiangsu, China
| | - Ankang Sheng
- Department of Breast Surgery, Yangzhou Maternal and Child Health Hospital Affiliated to Yangzhou University Medica College, Yangzhou, 225007, Jiangsu, China
| | - Hanyu Yao
- Department of Breast Surgery, Yangzhou Maternal and Child Health Hospital Affiliated to Yangzhou University Medica College, Yangzhou, 225007, Jiangsu, China
| | - Xiaohong Yang
- Department of Breast Surgery, Yangzhou Maternal and Child Health Hospital Affiliated to Yangzhou University Medica College, Yangzhou, 225007, Jiangsu, China
| | - Weiguang Liu
- Department of Breast Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, 056000, Hebei, China.
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Ferrant J, Pontis A, Zimmermann F, Dingli F, Poullet P, Loew D, Tarte K, Dumontet E. Phenotypic and proteomic analysis of plasma extracellular vesicles highlights them as potential biomarkers of primary Sjögren syndrome. Front Immunol 2023; 14:1207545. [PMID: 37529039 PMCID: PMC10388367 DOI: 10.3389/fimmu.2023.1207545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 06/14/2023] [Indexed: 08/03/2023] Open
Abstract
Sjögren syndrome (SjS) is an autoimmune disease characterized by the destruction of the exocrine gland epithelia, causing a dryness of mucosa called sicca symptoms, and whose main life-threatening complication is lymphoma. There is a need for new biomarkers in this disease, notably diagnostic biomarkers for patients with genuine sicca symptoms that do not meet current criteria, and prognostic biomarkers for patients at risk of lymphoma. Plasma extracellular vesicles (EVs) are promising biomarker candidates in several diseases, but their potential has not yet been explored in SjS. In this proof-of-concept study, we characterized EVs from primary SjS patients (pSS, n=12) at the phenotypic and proteomic levels, compared to EVs from healthy donor (HD, n=8) and systemic lupus erythematosus patients (SLE, n=12). Specific plasma EVs subpopulations, derived from neutrophils, endothelial, and epithelial cells, were found increased in pSS. We also identified a pSS proteomic signature in plasma EVs, including neutrophil-, epithelial-, and endothelial-related proteins, such as integrin alpha M (ITGAM), olfactomedin-4 (OLFM4), Ras-related protein RAB10, and CD36. Overall, our results support the relevance of plasma EVs as biomarkers in SjS.
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Affiliation(s)
- Juliette Ferrant
- Pôle Biologie, Centre Hospitalier Universitaire de Rennes, Rennes, France
- UMR, Université Rennes, INSERM, Établissement Français du Sang, Rennes, France
| | - Adeline Pontis
- Pôle Biologie, Centre Hospitalier Universitaire de Rennes, Rennes, France
| | - François Zimmermann
- Département de Médecine Interne et Immunologie Clinique, Centre Hospitalier Universitaire de Rennes, Rennes, France
| | - Florent Dingli
- Institut Curie, PSL Research University, CurieCoreTech Mass Spectrometry Proteomics, Paris, France
| | - Patrick Poullet
- Institut Curie, PSL Research University, INSERM, Mines Paris Tech, Bioinformatics core facility (CUBIC), Paris, France
| | - Damarys Loew
- Institut Curie, PSL Research University, CurieCoreTech Mass Spectrometry Proteomics, Paris, France
| | - Karin Tarte
- Pôle Biologie, Centre Hospitalier Universitaire de Rennes, Rennes, France
- UMR, Université Rennes, INSERM, Établissement Français du Sang, Rennes, France
| | - Erwan Dumontet
- Pôle Biologie, Centre Hospitalier Universitaire de Rennes, Rennes, France
- UMR, Université Rennes, INSERM, Établissement Français du Sang, Rennes, France
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Banerjee R, Raj A, Potdar C, Kumar Pal P, Yadav R, Kamble N, Holla V, Datta I. Astrocytes Differentiated from LRRK2-I1371V Parkinson's-Disease-Induced Pluripotent Stem Cells Exhibit Similar Yield but Cell-Intrinsic Dysfunction in Glutamate Uptake and Metabolism, ATP Generation, and Nrf2-Mediated Glutathione Machinery. Cells 2023; 12:1592. [PMID: 37371062 DOI: 10.3390/cells12121592] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/27/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Owing to the presence of multiple enzymatic domains, LRRK2 has been associated with a diverse set of cellular functions and signaling pathways. It also has several pathological mutant-variants, and their incidences show ethnicity biases and drug-response differences with expression in dopaminergic-neurons and astrocytes. Here, we aimed to assess the cell-intrinsic effect of the LRRK2-I1371V mutant variant, prevalent in East Asian populations, on astrocyte yield and biology, involving Nrf2-mediated glutathione machinery, glutamate uptake and metabolism, and ATP generation in astrocytes derived from LRRK2-I1371V PD patient iPSCs and independently confirmed in LRRK2-I1371V-overexpressed U87 cells. Astrocyte yield (GFAP-immunopositive) was comparable between LRRK2-I1371V and healthy control (HC) populations; however, the astrocytic capability to mitigate oxidative stress in terms of glutathione content was significantly reduced in the mutant astrocytes, along with a reduction in the gene expression of the enzymes involved in glutathione machinery and nuclear factor erythroid 2-related factor 2 (Nrf2) expression. Simultaneously, a significant decrease in glutamate uptake was observed in LRRK2-I1371V astrocytes, with lower gene expression of glutamate transporters SLC1A2 and SLC1A3. The reduction in the protein expression of SLC1A2 was also directly confirmed. Enzymes catalyzing the generation of γ glutamyl cysteine (precursor of glutathione) from glutamate and the metabolism of glutamate to enter the Krebs cycle (α-ketoglutaric acid) were impaired, with significantly lower ATP generation in LRRK2-I1371V astrocytes. De novo glutamine synthesis via the conversion of glutamate to glutamine was also affected, indicating glutamate metabolism disorder. Our data demonstrate for the first time that the mutation in the LRRK2-I1371V allele causes significant astrocytic dysfunction with respect to Nrf2-mediated antioxidant machinery, AT -generation, and glutamate metabolism, even with comparable astrocyte yields.
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Affiliation(s)
- Roon Banerjee
- Department of Biophysics, National Institute of Mental Health and Neurosciences, Institute of National Importance, Bengaluru 560029, Karnataka, India
| | - Aishwarya Raj
- Department of Biophysics, National Institute of Mental Health and Neurosciences, Institute of National Importance, Bengaluru 560029, Karnataka, India
| | - Chandrakanta Potdar
- Department of Biophysics, National Institute of Mental Health and Neurosciences, Institute of National Importance, Bengaluru 560029, Karnataka, India
| | - Pramod Kumar Pal
- Department of Neurology, National Institute of Mental Health and Neurosciences, Institute of National Importance, Bengaluru 560029, Karnataka, India
| | - Ravi Yadav
- Department of Neurology, National Institute of Mental Health and Neurosciences, Institute of National Importance, Bengaluru 560029, Karnataka, India
| | - Nitish Kamble
- Department of Neurology, National Institute of Mental Health and Neurosciences, Institute of National Importance, Bengaluru 560029, Karnataka, India
| | - Vikram Holla
- Department of Neurology, National Institute of Mental Health and Neurosciences, Institute of National Importance, Bengaluru 560029, Karnataka, India
| | - Indrani Datta
- Department of Biophysics, National Institute of Mental Health and Neurosciences, Institute of National Importance, Bengaluru 560029, Karnataka, India
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Hamilton MC, Fife JD, Akinci E, Yu T, Khowpinitchai B, Cha M, Barkal S, Thi TT, Yeo GH, Ramos Barroso JP, Francoeur MJ, Velimirovic M, Gifford DK, Lettre G, Yu H, Cassa CA, Sherwood RI. Systematic elucidation of genetic mechanisms underlying cholesterol uptake. CELL GENOMICS 2023; 3:100304. [PMID: 37228746 PMCID: PMC10203276 DOI: 10.1016/j.xgen.2023.100304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 12/02/2022] [Accepted: 03/24/2023] [Indexed: 05/27/2023]
Abstract
Genetic variation contributes greatly to LDL cholesterol (LDL-C) levels and coronary artery disease risk. By combining analysis of rare coding variants from the UK Biobank and genome-scale CRISPR-Cas9 knockout and activation screening, we substantially improve the identification of genes whose disruption alters serum LDL-C levels. We identify 21 genes in which rare coding variants significantly alter LDL-C levels at least partially through altered LDL-C uptake. We use co-essentiality-based gene module analysis to show that dysfunction of the RAB10 vesicle transport pathway leads to hypercholesterolemia in humans and mice by impairing surface LDL receptor levels. Further, we demonstrate that loss of function of OTX2 leads to robust reduction in serum LDL-C levels in mice and humans by increasing cellular LDL-C uptake. Altogether, we present an integrated approach that improves our understanding of the genetic regulators of LDL-C levels and provides a roadmap for further efforts to dissect complex human disease genetics.
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Affiliation(s)
- Marisa C. Hamilton
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - James D. Fife
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Ersin Akinci
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Tian Yu
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Benyapa Khowpinitchai
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Minsun Cha
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Sammy Barkal
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Thi Tun Thi
- Precision Medicine Research Programme, Cardiovascular Disease Research Programme, and Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Grace H.T. Yeo
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Biological Engineering, Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Juan Pablo Ramos Barroso
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Matthew Jake Francoeur
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Minja Velimirovic
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - David K. Gifford
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Biological Engineering, Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Guillaume Lettre
- Montreal Heart Institute, Montréal, QC H1T 1C8, Canada
- Faculté de Médecine, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Haojie Yu
- Precision Medicine Research Programme, Cardiovascular Disease Research Programme, and Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Christopher A. Cassa
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Richard I. Sherwood
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
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10
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Erasimus H, Kolnik V, Lacroix F, Sidhu S, D'Agostino S, Lemaitre O, Rohaut A, Sanchez I, Thill G, Didier M, Debussche L, Marcireau C. Genome-wide CRISPR Screen Reveals RAB10 as a Synthetic Lethal Gene in Colorectal and Pancreatic Cancers Carrying SMAD4 Loss. CANCER RESEARCH COMMUNICATIONS 2023; 3:780-792. [PMID: 37377893 PMCID: PMC10158796 DOI: 10.1158/2767-9764.crc-22-0301] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 03/01/2023] [Accepted: 04/07/2023] [Indexed: 06/29/2023]
Abstract
The TGFβ signaling mediator SMAD4 is frequently mutated or deleted in colorectal and pancreatic cancers. SMAD4 acts as a tumor suppressor and its loss is associated with poorer patient outcomes. The purpose of this study was to find synthetic lethal interactions with SMAD4 deficiency to find novel therapeutic strategies for the treatment of patients with SMAD4-deficient colorectal or pancreatic cancers. Using pooled lentiviral single-guide RNA libraries, we conducted genome-wide loss-of-function screens in Cas9-expressing colorectal and pancreatic cancer cells harboring altered or wild-type SMAD4. The small GTPase protein RAB10 was identified and validated as a susceptibility gene in SMAD4-altered colorectal and pancreatic cancer cells. Rescue assays showed that RAB10 reintroduction reversed the antiproliferative effects of RAB10 knockout in SMAD4-negative cell lines. Further investigation is necessary to shed light on the mechanism by which RAB10 inhibition decreases cell proliferation of SMAD4-negative cells. Significance This study identified and validated RAB10 as new synthetic lethal gene with SMAD4. This was achieved by conducting a whole-genome CRISPR screens in different colorectal and pancreatic cell lines. A future RAB10 inhibitors could correspond to a new therapeutic solution for patients with cancer with SMAD4 deletion.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Gilbert Thill
- Sanofi, Translational Sciences, Chilly-Mazarin, France
| | - Michel Didier
- Sanofi, Translational Sciences, Chilly-Mazarin, France
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11
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Xu R, Wan M, Shi X, Ma S, Zhang L, Yi P, Zhang R. A Rab10-ACAP1-Arf6 GTPases cascade modulates M4 muscarinic acetylcholine receptor trafficking and signaling. Cell Mol Life Sci 2023; 80:87. [PMID: 36917255 PMCID: PMC11072986 DOI: 10.1007/s00018-023-04722-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 03/16/2023]
Abstract
Membrane trafficking processes regulate the G protein-coupled receptor activity. The muscarinic acetylcholine receptors (mAChRs) are highly pursued drug targets for neurological diseases, but the cellular machineries that control the trafficking of these receptors remain largely elusive. Here, we revealed the role of the small GTPase Rab10 as a negative regulator for the post-activation trafficking of M4 mAChR and the underlying mechanism. We show that constitutively active Rab10 arrests the receptor within Rab5-positive early endosomes and significantly hinders the resensitization of M4-mediated Ca2+ signaling. Mechanistically, M4 binds to Rab10-GTP, which requires the motif 386RKKRQMAA393 (R386-A393) within the third intracellular loop. Moreover, Rab10-GTP inactivates Arf6 by recruiting the Arf6 GTPase-activating protein, ACAP1. Strikingly, deletion of the motif R386-A393 causes M4 to bypass the control by Rab10 and switch to the Rab4-facilitated fast recycling pathway, thus reusing the receptor. Therefore, Rab10 couples the cargo sorting and membrane trafficking regulation through cycle between GTP-bound and GDP-bound state. Our findings suggest a model that Rab10 binds to the M4 like a molecular brake and controls the receptor's transport through endosomes, thus modulating the signaling, and this regulation is specific among the mAChR subtypes.
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Affiliation(s)
- Rongmei Xu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Min Wan
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, USA
| | - Xuemeng Shi
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
- College of Life Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Shumin Ma
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Lina Zhang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ping Yi
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China.
| | - Rongying Zhang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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12
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Lazo OM, Schiavo G. Rab10 regulates the sorting of internalised TrkB for retrograde axonal transport. eLife 2023; 12:81532. [PMID: 36897066 PMCID: PMC10005780 DOI: 10.7554/elife.81532] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 02/15/2023] [Indexed: 03/11/2023] Open
Abstract
Neurons process real-time information from axon terminals to coordinate gene expression, growth, and plasticity. Inputs from distal axons are encoded as a stream of endocytic organelles, termed signalling endosomes, targeted to the soma. Formation of these organelles depends on target-derived molecules, such as brain-derived neurotrophic factor (BDNF), which is recognised by TrkB receptors on the plasma membrane, endocytosed, and transported to the cell body along the microtubules network. Notwithstanding its physiological and neuropathological importance, the mechanism controlling the sorting of TrkB to signalling endosomes is currently unknown. In this work, we use primary mouse neurons to uncover the small GTPase Rab10 as critical for TrkB sorting and propagation of BDNF signalling from axon terminals to the soma. Our data demonstrate that Rab10 defines a novel membrane compartment that is rapidly mobilised towards the axon terminal upon BDNF stimulation, enabling the axon to fine-tune retrograde signalling depending on BDNF availability at the synapse. These results help clarifying the neuroprotective phenotype recently associated to Rab10 polymorphisms in Alzheimer's disease and provide a new therapeutic target to halt neurodegeneration.
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Affiliation(s)
- Oscar Marcelo Lazo
- Department of Neuromuscular Diseases and UCL Queen Square Motor Neuron Disease Centre, UCL Queen Square Institute of Neurology, University College LondonLondonUnited Kingdom
- UK Dementia Research Institute at UCLLondonUnited Kingdom
| | - Giampietro Schiavo
- Department of Neuromuscular Diseases and UCL Queen Square Motor Neuron Disease Centre, UCL Queen Square Institute of Neurology, University College LondonLondonUnited Kingdom
- UK Dementia Research Institute at UCLLondonUnited Kingdom
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13
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Hamilton MC, Fife JD, Akinci E, Yu T, Khowpinitchai B, Cha M, Barkal S, Thi TT, Yeo GH, Ramos Barroso JP, Jake Francoeur M, Velimirovic M, Gifford DK, Lettre G, Yu H, Cassa CA, Sherwood RI. Systematic elucidation of genetic mechanisms underlying cholesterol uptake. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.09.500804. [PMID: 36711952 PMCID: PMC9881906 DOI: 10.1101/2023.01.09.500804] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Genetic variation contributes greatly to LDL cholesterol (LDL-C) levels and coronary artery disease risk. By combining analysis of rare coding variants from the UK Biobank and genome-scale CRISPR-Cas9 knockout and activation screening, we have substantially improved the identification of genes whose disruption alters serum LDL-C levels. We identify 21 genes in which rare coding variants significantly alter LDL-C levels at least partially through altered LDL-C uptake. We use co-essentiality-based gene module analysis to show that dysfunction of the RAB10 vesicle transport pathway leads to hypercholesterolemia in humans and mice by impairing surface LDL receptor levels. Further, we demonstrate that loss of function of OTX2 leads to robust reduction in serum LDL-C levels in mice and humans by increasing cellular LDL-C uptake. Altogether, we present an integrated approach that improves our understanding of genetic regulators of LDL-C levels and provides a roadmap for further efforts to dissect complex human disease genetics.
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Affiliation(s)
- Marisa C. Hamilton
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - James D. Fife
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Ersin Akinci
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Tian Yu
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Benyapa Khowpinitchai
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Minsun Cha
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Sammy Barkal
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Thi Tun Thi
- Precision Medicine Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Cardiovascular Disease Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Grace H.T. Yeo
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Juan Pablo Ramos Barroso
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Matthew Jake Francoeur
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Minja Velimirovic
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - David K. Gifford
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Biological Engineering, Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Guillaume Lettre
- Montreal Heart Institute, Montréal, Québec, H1T 1C8, Canada
- Faculté de Médecine, Université de Montréal, Montréal, Québec, H3T 1J4, Canada
| | - Haojie Yu
- Precision Medicine Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Cardiovascular Disease Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Christopher A. Cassa
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Richard I. Sherwood
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
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14
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Role of Long Intergenic Noncoding RNAs in Cancers with an Overview of MicroRNA Binding. Mol Diagn Ther 2023; 27:29-47. [PMID: 36287372 PMCID: PMC9813052 DOI: 10.1007/s40291-022-00619-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2022] [Indexed: 02/04/2023]
Abstract
Long intergenic noncoding RNAs are transcripts originating from the regions without annotated coding genes. They are located mainly in the nucleus and regulate gene expression. Long intergenic noncoding RNAs can be also found in the cytoplasm acting as molecular sponges of certain microRNAs. This is crucial in various biological and signaling pathways. Expression levels of many long intergenic noncoding RNAs are disease related. In this article, we focus on the long intergenic noncoding RNAs and their relation to different types of cancer. Studies showed that abnormal expression of long intergenic noncoding RNA deregulates signaling pathways due to the disrupted free microRNA pool. Hampered signaling pathways leads to abnormal cell proliferation and restricts cell death, thus resulting in oncogenesis. This review highlights promising therapeutic targets and enables the identification of potential biomarkers specific for a certain type of cancer. Moreover, we provide an outline of long intergenic noncoding RNAs/microRNA axes, which might be applied in further detailed experiments broadening our knowledge about the cellular role of those RNA species.
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15
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Zhang X, Chen C, Ling C, Luo S, Xiong Z, Liu X, Liao C, Xie P, Liu Y, Zhang L, Chen Z, Liu Z, Tang J. EGFR tyrosine kinase activity and Rab GTPases coordinate EGFR trafficking to regulate macrophage activation in sepsis. Cell Death Dis 2022; 13:934. [PMID: 36344490 PMCID: PMC9640671 DOI: 10.1038/s41419-022-05370-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 11/09/2022]
Abstract
EGFR phosphorylation is required for TLR4-mediated macrophage activation during sepsis. However, whether and how intracellular EGFR is transported during endotoxemia have largely been unknown. Here, we show that LPS promotes high levels cell surface expression of EGFR in macrophages through two different transport mechanisms. On one hand, Rab10 is required for EEA1-mediated the membrane translocation of EGFR from the Golgi. On the other hand, EGFR phosphorylation prevents its endocytosis in a kinase activity-dependent manner. Erlotinib, an EGFR tyrosine kinase inhibitor, significantly reduced membrane EGFR expression in LPS-activated macrophage. Mechanistically, upon LPS induced TLR4/EGFR phosphorylation, MAPK14 phosphorylated Rab7a at S72 impaired membrane receptor late endocytosis, which maintains EGFR membrane localization though blocking its lysosomal degradation. Meanwhile, Rab5a is also involved in the early endocytosis of EGFR. Subsequently, inhibition of EGFR phosphorylation switches M1 phenotype to M2 phenotype and alleviates sepsis-induced acute lung injury. Mechanistic study demonstrated that Erlotinib suppressed glycolysis-dependent M1 polarization via PKM2/HIF-1ɑ pathway and promoted M2 polarization through up-regulating PPARγ induced glutamine metabolism. Collectively, our data elucidated a more in-depth mechanism of macrophages activation, and provided stronger evidence supporting EGFR as a potential therapeutic target for the treatment of sepsis.
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Affiliation(s)
- Xuedi Zhang
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China ,grid.410560.60000 0004 1760 3078Guangdong Medical University, Zhanjiang, 524000 Guangdong China
| | - Cuiping Chen
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China
| | - Chunxiu Ling
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China ,grid.410560.60000 0004 1760 3078Guangdong Medical University, Zhanjiang, 524000 Guangdong China
| | - Shuhua Luo
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China ,grid.410560.60000 0004 1760 3078Guangdong Medical University, Zhanjiang, 524000 Guangdong China
| | - Ziying Xiong
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China ,grid.410560.60000 0004 1760 3078Guangdong Medical University, Zhanjiang, 524000 Guangdong China
| | - Xiaolei Liu
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China ,grid.410560.60000 0004 1760 3078Guangdong Medical University, Zhanjiang, 524000 Guangdong China
| | - Chaoxiong Liao
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China ,grid.410560.60000 0004 1760 3078Guangdong Medical University, Zhanjiang, 524000 Guangdong China
| | - Pengyun Xie
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China
| | - Youtan Liu
- grid.284723.80000 0000 8877 7471The Department of Anesthesiology, Shenzhen Hospital, Southern Medical University, Shenzhen, 518000 Guangdong China
| | - Liangqing Zhang
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China
| | - Zhanghui Chen
- Department of Hematology, Zhanjiang Institute of Clinical Medicine, Zhanjiang Central Hospital, 524000 Zhanjiang, China
| | - Zhifeng Liu
- The Department of Critical Care Medicine, General Hospital of Southern Theater Command of PLA, Guangzhou, 510010 Guangdong China
| | - Jing Tang
- grid.410560.60000 0004 1760 3078The Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524000 Guangdong China
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16
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McGarry DJ, Castino G, Lilla S, Carnet A, Kelly L, Micovic K, Zanivan S, Olson MF. MICAL1 activation by PAK1 mediates actin filament disassembly. Cell Rep 2022; 41:111442. [PMID: 36198272 DOI: 10.1016/j.celrep.2022.111442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 06/14/2022] [Accepted: 09/09/2022] [Indexed: 11/03/2022] Open
Abstract
The MICAL1 monooxygenase is an important regulator of filamentous actin (F-actin) structures. Although MICAL1 has been shown to be regulated via protein-protein interactions at the autoinhibitory carboxyl terminus, a link between actin-regulatory RHO GTPase signaling pathways and MICAL1 has not been established. We show that the CDC42 GTPase effector PAK1 associates with and phosphorylates MICAL1 on two serine residues, leading to accelerated F-actin disassembly. PAK1 binds to the amino-terminal catalytic monooxygenase and calponin homology domains, distinct from the autoinhibitory carboxyl terminus. Extracellular ligand stimulation leads to PAK-dependent phosphorylation, linking external signals to MICAL1 phosphorylation. Mass spectrometry indicates that MICAL1 co-expression with CDC42 and PAK1 increases MICAL1 association with hundreds of proteins, including the previously described MICAL1-interacting proteins RAB10 and RAB7A. These results provide insights into a redox-mediated pathway linking extracellular signals to cytoskeleton regulation via a RHO GTPase and indicate a means of communication between RHO and RAB GTPases.
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Affiliation(s)
- David J McGarry
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Giovanni Castino
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Sergio Lilla
- Cancer Research UK Beatson Institute, Glasgow G61 1BD, UK
| | - Alexandre Carnet
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Loughlin Kelly
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Katarina Micovic
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Sara Zanivan
- Cancer Research UK Beatson Institute, Glasgow G61 1BD, UK; Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Michael F Olson
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada.
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17
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Liang XY, Zhang Y, He YN, Liu XY, Ding ZH, Zhang XD, Dong MY, Du RL. A cancer stem cell associated gene signature for predicting overall survival of hepatocellular carcinoma. Front Genet 2022; 13:888601. [PMID: 36171884 PMCID: PMC9511042 DOI: 10.3389/fgene.2022.888601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the most prevalent type of primary liver cancer characterized by high mortality and morbidity rate. The lack of effective treatments and the high frequency of recurrence lead to poor prognosis of patients with HCC. Therefore, it is important to develop robust prediction tools for predicting the prognosis of HCC. Recent studies have shown that cancer stem cells (CSC) participate in HCC progression. The aim of this study was to explore the prognostic value of CSC-related genes and establish a prediction model based on data from The Cancer Genome Atlas (TCGA) database. In this study, 475 CSC-related genes were obtained from the Molecular Signature Database and 160 differentially expressed CSC-related genes in HCC patients were identified using the limma R package in the TCGA database. A total of 79 CSC-related genes were found to be associated with overall survival (OS). Using the least absolute shrinkage and selection operator (LASSO) and multivariate Cox regressions, a 3-gene signature (RAB10, TCOF1, and PSMD14) was constructed. Receiver operating characteristic (ROC) curves and Kaplan-Meier survival curves were constructed to test the prediction performance of the signature. Performance of the signature was validated using the International Cancer Genome Consortium (ICGC) dataset. In addition, immune feature and functional enrichment analyses were carried out to explore the underlying mechanisms. Moreover, a co-expression network was constructed using the weighted gene correlation network analysis (WGCNA) method to select genes significantly associated with risk scores in HCC in the TCGA dataset. The SGO2 gene was found to be significantly associated with risk scores of HCC. In vitro experiments revealed that it can promote HCC cell proliferation. Therefore, SGO2 may be a potential therapeutic target for HCC treatment. The constructed nomogram can help clinicians make decisions about HCC treatment.
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Affiliation(s)
- Xin-Yi Liang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, China
| | - Yue Zhang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, China
| | - Ya-Nan He
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, China
| | - Xue-Yi Liu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, China
| | - Zhi-Hao Ding
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, China
| | - Xiao-Dong Zhang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, China
| | - Ming-You Dong
- The Key Laboratory of Molecular Pathology (For Hepatobiliary Diseases) of Guangxi, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
- *Correspondence: Ming-You Dong, ; Run-Lei Du,
| | - Run-Lei Du
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, China
- *Correspondence: Ming-You Dong, ; Run-Lei Du,
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18
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Host Cell Signatures of the Envelopment Site within Beta-Herpes Virions. Int J Mol Sci 2022; 23:ijms23179994. [PMID: 36077391 PMCID: PMC9456339 DOI: 10.3390/ijms23179994] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/22/2022] [Accepted: 08/24/2022] [Indexed: 11/26/2022] Open
Abstract
Beta-herpesvirus infection completely reorganizes the membrane system of the cell. This system is maintained by the spatiotemporal arrangement of more than 3000 cellular proteins that continuously adapt the configuration of membrane organelles according to cellular needs. Beta-herpesvirus infection establishes a new configuration known as the assembly compartment (AC). The AC membranes are loaded with virus-encoded proteins during the long replication cycle and used for the final envelopment of the newly formed capsids to form infectious virions. The identity of the envelopment membranes is still largely unknown. Electron microscopy and immunofluorescence studies suggest that the envelopment occurs as a membrane wrapping around the capsids, similar to the growth of phagophores, in the area of the AC with the membrane identities of early/recycling endosomes and the trans-Golgi network. During wrapping, host cell proteins that define the identity and shape of these membranes are captured along with the capsids and incorporated into the virions as host cell signatures. In this report, we reviewed the existing information on host cell signatures in human cytomegalovirus (HCMV) virions. We analyzed the published proteomes of the HCMV virion preparations that identified a large number of host cell proteins. Virion purification methods are not yet advanced enough to separate all of the components of the rich extracellular material, including the large amounts of non-vesicular extracellular particles (NVEPs). Therefore, we used the proteomic data from large and small extracellular vesicles (lEVs and sEVs) and NVEPs to filter out the host cell proteins identified in the viral proteomes. Using these filters, we were able to narrow down the analysis of the host cell signatures within the virions and determine that envelopment likely occurs at the membranes derived from the tubular recycling endosomes. Many of these signatures were also found at the autophagosomes, suggesting that the CMV-infected cell forms membrane organelles with phagophore growth properties using early endosomal host cell machinery that coordinates endosomal recycling.
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19
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Khan TG, Ginsburg D, Emmer BT. The small GTPase RAB10 regulates endosomal recycling of the LDL receptor and transferrin receptor in hepatocytes. J Lipid Res 2022; 63:100248. [PMID: 35753407 PMCID: PMC9305350 DOI: 10.1016/j.jlr.2022.100248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/16/2022] [Accepted: 06/17/2022] [Indexed: 11/30/2022] Open
Abstract
The low-density lipoprotein receptor (LDLR) mediates the hepatic uptake of circulating low-density lipoproteins (LDLs), a process that modulates the development of atherosclerotic cardiovascular disease. We recently identified RAB10, encoding a small GTPase, as a positive regulator of LDL uptake in hepatocellular carcinoma cells (HuH7) in a genome-wide CRISPR screen, though the underlying molecular mechanism for this effect was unknown. We now report that RAB10 regulates hepatocyte LDL uptake by promoting the recycling of endocytosed LDLR from RAB11-positive endosomes to the plasma membrane. We also show that RAB10 similarly promotes the recycling of the transferrin receptor, which binds the transferrin protein that mediates the transport of iron in the blood, albeit from a distinct RAB4-positive compartment. Taken together, our findings suggest a model in which RAB10 regulates LDL and transferrin uptake by promoting both slow and rapid recycling routes for their respective receptor proteins.
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Affiliation(s)
- Taslima Gani Khan
- Program in Chemical Biology, University of Michigan, Ann Arbor, MI; Life Sciences Institute, University of Michigan, Ann Arbor, MI
| | - David Ginsburg
- Program in Chemical Biology, University of Michigan, Ann Arbor, MI; Life Sciences Institute, University of Michigan, Ann Arbor, MI; Department of Internal Medicine, University of Michigan, Ann Arbor, MI; Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI; Departments of Human Genetics and Pediatrics, University of Michigan, Ann Arbor, MI
| | - Brian T Emmer
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI
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20
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Degrandmaison J, Grisé O, Parent JL, Gendron L. Differential barcoding of opioid receptors trafficking. J Neurosci Res 2021; 100:99-128. [PMID: 34559903 DOI: 10.1002/jnr.24949] [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: 11/26/2020] [Revised: 07/25/2021] [Accepted: 08/05/2021] [Indexed: 11/09/2022]
Abstract
Over the past several years, studies have highlighted the δ-opioid receptor (DOPr) as a promising therapeutic target for chronic pain management. While exhibiting milder undesired effects than most currently prescribed opioids, its specific agonists elicit effective analgesic responses in numerous animal models of chronic pain, including inflammatory, neuropathic, diabetic, and cancer-related pain. However, as compared with the extensively studied μ-opioid receptor, the molecular mechanisms governing its trafficking remain elusive. Recent advances have denoted several significant particularities in the regulation of DOPr intracellular routing, setting it apart from the other members of the opioid receptor family. Although they share high homology, each opioid receptor subtype displays specific amino acid patterns potentially involved in the regulation of its trafficking. These precise motifs or "barcodes" are selectively recognized by regulatory proteins and therefore dictate several aspects of the itinerary of a receptor, including its anterograde transport, internalization, recycling, and degradation. With a specific focus on the regulation of DOPr trafficking, this review will discuss previously reported, as well as potential novel trafficking barcodes within the opioid and nociceptin/orphanin FQ opioid peptide receptors, and their impact in determining distinct interactomes and physiological responses.
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Affiliation(s)
- Jade Degrandmaison
- Département de Pharmacologie-Physiologie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC, Canada.,Département de Médecine, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC, Canada.,Institut de Pharmacologie de Sherbrooke, Centre de Recherche du CHUS, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC, Canada.,Quebec Network of Junior Pain Investigators, QC, Canada
| | - Olivier Grisé
- Département de Médecine, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC, Canada.,Institut de Pharmacologie de Sherbrooke, Centre de Recherche du CHUS, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Jean-Luc Parent
- Département de Médecine, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC, Canada.,Institut de Pharmacologie de Sherbrooke, Centre de Recherche du CHUS, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Louis Gendron
- Département de Pharmacologie-Physiologie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC, Canada.,Institut de Pharmacologie de Sherbrooke, Centre de Recherche du CHUS, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC, Canada.,Quebec Pain Research Network, QC, Canada
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21
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Marcelić M, Lučin HM, Begonja AJ, Zagorac GB, Lisnić VJ, Lučin P. Endosomal Phosphatidylinositol-3-Phosphate-Associated Functions Are Dispensable for Establishment of the Cytomegalovirus Pre-Assembly Compartment but Essential for the Virus Growth. Life (Basel) 2021; 11:859. [PMID: 34440603 PMCID: PMC8398575 DOI: 10.3390/life11080859] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/16/2021] [Accepted: 08/20/2021] [Indexed: 01/20/2023] Open
Abstract
Murine cytomegalovirus (MCMV) initiates the stepwise establishment of the pre-assembly compartment (pre-AC) in the early phase of infection by the expansion of the early endosome (EE)/endosomal recycling compartment (ERC) interface and relocation of the Golgi complex. We depleted Vps34-derived phosphatidylinositol-3-phosphate (PI(3)P) at EEs by VPS34-IN1 and inhibited PI(3)P-associated functions by overexpression of 2xFYVE- and p40PX PI(3)P-binding modules to assess the role of PI(3)P-dependent EE domains in the pre-AC biogenesis. We monitored the accumulation of Rab10 and Evectin-2 in the inner pre-AC and the relocation of GM130-positive cis-Golgi organelles to the outer pre-AC by confocal microscopy. Although PI(3)P- and Vps34-positive endosomes build a substantial part of pre-AC, the PI(3)P depletion and the inhibition of PI(3)P-associated functions did not prevent the establishment of infection and progression through the early phase. The PI(3)P depletion in uninfected and MCMV-infected cells rapidly dispersed PI(3)P-bond proteins and reorganized EEs, including ablation of EE-to-ERC transport and relocation of Rab11 endosomes. The PI(3)P depletion one hour before pre-AC initiation and overexpression of 2xFYVE and p40PX domains neither prevented Rab10- and Evectin-2 accumulation, nor Golgi unlinking and relocation. These data demonstrate that PI(3)P-dependent functions, including the Rab11-dependent EE-to-ERC route, are dispensable for pre-AC initiation. Nevertheless, the virus growth was drastically reduced in PI(3)P-depleted cells, indicating that PI(3)P-associated functions are essential for the late phase of infection.
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Affiliation(s)
- Marina Marcelić
- Department of Physiology and Immunology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia; (M.M.); (H.M.L.); (G.B.Z.)
| | - Hana Mahmutefendić Lučin
- Department of Physiology and Immunology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia; (M.M.); (H.M.L.); (G.B.Z.)
- University North, University Center Varaždin, Jurja Križanića 31b, 42000 Varaždin, Croatia
| | - Antonija Jurak Begonja
- Department of Biotechnology, University of Rijeka, Radmile Matejčić 2, 51000 Rijeka, Croatia;
| | - Gordana Blagojević Zagorac
- Department of Physiology and Immunology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia; (M.M.); (H.M.L.); (G.B.Z.)
- University North, University Center Varaždin, Jurja Križanića 31b, 42000 Varaždin, Croatia
| | - Vanda Juranić Lisnić
- Center for Proteomics, Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia;
| | - Pero Lučin
- Department of Physiology and Immunology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia; (M.M.); (H.M.L.); (G.B.Z.)
- University North, University Center Varaždin, Jurja Križanića 31b, 42000 Varaždin, Croatia
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22
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Boddy KC, Zhu H, D'Costa VM, Xu C, Beyrakhova K, Cygler M, Grinstein S, Coyaud E, Laurent EMN, St-Germain J, Raught B, Brumell JH. Salmonella effector SopD promotes plasma membrane scission by inhibiting Rab10. Nat Commun 2021; 12:4707. [PMID: 34349110 PMCID: PMC8339009 DOI: 10.1038/s41467-021-24983-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 07/16/2021] [Indexed: 12/17/2022] Open
Abstract
Salmonella utilizes translocated virulence proteins (termed effectors) to promote host cell invasion. The effector SopD contributes to invasion by promoting scission of the plasma membrane, generating Salmonella-containing vacuoles. SopD is expressed in all Salmonella lineages and plays important roles in animal models of infection, but its host cell targets are unknown. Here we show that SopD can bind to and inhibit the small GTPase Rab10, through a C-terminal GTPase activating protein (GAP) domain. During infection, Rab10 and its effectors MICAL-L1 and EHBP1 are recruited to invasion sites. By inhibiting Rab10, SopD promotes removal of Rab10 and recruitment of Dynamin-2 to drive scission of the plasma membrane. Together, our study uncovers an important role for Rab10 in regulating plasma membrane scission and identifies the mechanism used by a bacterial pathogen to manipulate this function during infection.
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Affiliation(s)
- Kirsten C Boddy
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada.,Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Hongxian Zhu
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Vanessa M D'Costa
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada.,Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada.,Centre for Infection, Immunity and Inflammation, University of Ottawa, Ottawa, Canada
| | - Caishuang Xu
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Ksenia Beyrakhova
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Miroslaw Cygler
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Sergio Grinstein
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada.,Institute of Medical Science, University of Toronto, Toronto, ON, Canada.,Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - Etienne Coyaud
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Estelle M N Laurent
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Jonathan St-Germain
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Brian Raught
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - John H Brumell
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada. .,Institute of Medical Science, University of Toronto, Toronto, ON, Canada. .,Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada. .,SickKids IBD Centre, Hospital for Sick Children, Toronto, ON, Canada.
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23
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RAB10 Interacts with ABCB4 and Regulates Its Intracellular Traffic. Int J Mol Sci 2021; 22:ijms22137087. [PMID: 34209301 PMCID: PMC8268348 DOI: 10.3390/ijms22137087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 12/11/2022] Open
Abstract
ABCB4 (ATP-binding cassette subfamily B member 4) is an ABC transporter expressed at the canalicular membrane of hepatocytes where it ensures phosphatidylcholine secretion into bile. Genetic variations of ABCB4 are associated with several rare cholestatic diseases. The available treatments are not efficient for a significant proportion of patients with ABCB4-related diseases and liver transplantation is often required. The development of novel therapies requires a deep understanding of the molecular mechanisms regulating ABCB4 expression, intracellular traffic, and function. Using an immunoprecipitation approach combined with mass spectrometry analyses, we have identified the small GTPase RAB10 as a novel molecular partner of ABCB4. Our results indicate that the overexpression of wild type RAB10 or its dominant-active mutant significantly increases the amount of ABCB4 at the plasma membrane expression and its phosphatidylcholine floppase function. Contrariwise, RAB10 silencing induces the intracellular retention of ABCB4 and then indirectly diminishes its secretory function. Taken together, our findings suggest that RAB10 regulates the plasma membrane targeting of ABCB4 and consequently its capacity to mediate phosphatidylcholine secretion.
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24
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Seguin L, Odouard S, Corlazzoli F, Haddad SA, Moindrot L, Calvo Tardón M, Yebra M, Koval A, Marinari E, Bes V, Guérin A, Allard M, Ilmjärv S, Katanaev VL, Walker PR, Krause KH, Dutoit V, Sarkaria JN, Dietrich PY, Cosset É. Macropinocytosis requires Gal-3 in a subset of patient-derived glioblastoma stem cells. Commun Biol 2021; 4:718. [PMID: 34112916 PMCID: PMC8192788 DOI: 10.1038/s42003-021-02258-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 05/21/2021] [Indexed: 12/11/2022] Open
Abstract
Recently, we involved the carbohydrate-binding protein Galectin-3 (Gal-3) as a druggable target for KRAS-mutant-addicted lung and pancreatic cancers. Here, using glioblastoma patient-derived stem cells (GSCs), we identify and characterize a subset of Gal-3high glioblastoma (GBM) tumors mainly within the mesenchymal subtype that are addicted to Gal-3-mediated macropinocytosis. Using both genetic and pharmacologic inhibition of Gal-3, we showed a significant decrease of GSC macropinocytosis activity, cell survival and invasion, in vitro and in vivo. Mechanistically, we demonstrate that Gal-3 binds to RAB10, a member of the RAS superfamily of small GTPases, and β1 integrin, which are both required for macropinocytosis activity and cell survival. Finally, by defining a Gal-3/macropinocytosis molecular signature, we could predict sensitivity to this dependency pathway and provide proof-of-principle for innovative therapeutic strategies to exploit this Achilles' heel for a significant and unique subset of GBM patients.
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Affiliation(s)
- Laetitia Seguin
- University Côte d'Azur, CNRS UMR7284, INSERM U1081, Institute for Research on Cancer and Aging (IRCAN), Nice, France
| | - Soline Odouard
- Laboratory of Tumor Immunology, Department of Oncology, Center for Translational Research in Onco-Hematology, Swiss Cancer Center Léman (SCCL), Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Francesca Corlazzoli
- Laboratory of Tumor Immunology, Department of Oncology, Center for Translational Research in Onco-Hematology, Swiss Cancer Center Léman (SCCL), Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Sarah Al Haddad
- Laboratory of Tumor Immunology, Department of Oncology, Center for Translational Research in Onco-Hematology, Swiss Cancer Center Léman (SCCL), Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Laurine Moindrot
- Laboratory of Tumor Immunology, Department of Oncology, Center for Translational Research in Onco-Hematology, Swiss Cancer Center Léman (SCCL), Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Marta Calvo Tardón
- Laboratory of Immunobiology of brain tumors, Center for Translational Research in Onco-Hematology, Geneva University Hospitals, and University of Geneva, Geneva, Switzerland
| | - Mayra Yebra
- Department of Surgery, Moores Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - Alexey Koval
- Department of Cell Physiology and Metabolism, Medical School, University of Geneva, Geneva, Switzerland
| | - Eliana Marinari
- Laboratory of Tumor Immunology, Department of Oncology, Center for Translational Research in Onco-Hematology, Swiss Cancer Center Léman (SCCL), Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Viviane Bes
- Laboratory of Immunobiology of brain tumors, Center for Translational Research in Onco-Hematology, Geneva University Hospitals, and University of Geneva, Geneva, Switzerland
| | - Alexandre Guérin
- Department of Pathology and Immunology, Medical School, University of Geneva, Geneva, Geneva, Switzerland
| | - Mathilde Allard
- Laboratory of Tumor Immunology, Department of Oncology, Center for Translational Research in Onco-Hematology, Swiss Cancer Center Léman (SCCL), Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Sten Ilmjärv
- Department of Pathology and Immunology, Medical School, University of Geneva, Geneva, Geneva, Switzerland
| | - Vladimir L Katanaev
- Department of Cell Physiology and Metabolism, Medical School, University of Geneva, Geneva, Switzerland
| | - Paul R Walker
- Laboratory of Immunobiology of brain tumors, Center for Translational Research in Onco-Hematology, Geneva University Hospitals, and University of Geneva, Geneva, Switzerland
| | - Karl-Heinz Krause
- Department of Pathology and Immunology, Medical School, University of Geneva, Geneva, Geneva, Switzerland
| | - Valérie Dutoit
- Laboratory of Tumor Immunology, Department of Oncology, Center for Translational Research in Onco-Hematology, Swiss Cancer Center Léman (SCCL), Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Jann N Sarkaria
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN, USA
| | - Pierre-Yves Dietrich
- Laboratory of Tumor Immunology, Department of Oncology, Center for Translational Research in Onco-Hematology, Swiss Cancer Center Léman (SCCL), Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Érika Cosset
- Laboratory of Tumor Immunology, Department of Oncology, Center for Translational Research in Onco-Hematology, Swiss Cancer Center Léman (SCCL), Geneva University Hospitals, University of Geneva, Geneva, Switzerland.
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25
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Kawai K, Nishigaki A, Moriya S, Egami Y, Araki N. Rab10-Positive Tubular Structures Represent a Novel Endocytic Pathway That Diverges From Canonical Macropinocytosis in RAW264 Macrophages. Front Immunol 2021; 12:649600. [PMID: 34135890 PMCID: PMC8203412 DOI: 10.3389/fimmu.2021.649600] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 05/11/2021] [Indexed: 12/19/2022] Open
Abstract
Using the optogenetic photo-manipulation of photoactivatable (PA)-Rac1, remarkable cell surface ruffling and the formation of a macropinocytic cup (premacropinosome) could be induced in the region of RAW264 macrophages irradiated with blue light due to the activation of PA-Rac1. However, the completion of macropinosome formation did not occur until Rac1 was deactivated by the removal of the light stimulus. Following PA-Rac1 deactivation, some premacropinosomes closed into intracellular macropinosomes, whereas many others transformed into long Rab10-positive tubules without forming typical macropinosomes. These Rab10-positive tubules moved centripetally towards the perinuclear Golgi region along microtubules. Surprisingly, these Rab10-positive tubules did not contain any endosome/lysosome compartment markers, such as Rab5, Rab7, or LAMP1, suggesting that the Rab10-positive tubules were not part of the degradation pathway for lysosomes. These Rab10-positive tubules were distinct from recycling endosomal compartments, which are labeled with Rab4, Rab11, or SNX1. These findings suggested that these Rab10-positive tubules may be a part of non-degradative endocytic pathway that has never been known. The formation of Rab10-positive tubules from premacropinosomes was also observed in control and phorbol myristate acetate (PMA)-stimulated macrophages, although their frequencies were low. Interestingly, the formation of Rab10-positive premacropinosomes and tubules was not inhibited by phosphoinositide 3-kinase (PI3K) inhibitors, while the classical macropinosome formation requires PI3K activity. Thus, this study provides evidence to support the existence of Rab10-positive tubules as a novel endocytic pathway that diverges from canonical macropinocytosis.
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Affiliation(s)
- Katsuhisa Kawai
- Department of Histology and Cell Biology, School of Medicine, Kagawa University, Miki, Japan
| | - Arata Nishigaki
- Department of Histology and Cell Biology, School of Medicine, Kagawa University, Miki, Japan
| | - Seiji Moriya
- Department of Histology and Cell Biology, School of Medicine, Kagawa University, Miki, Japan
| | - Youhei Egami
- Department of Histology and Cell Biology, School of Medicine, Kagawa University, Miki, Japan
| | - Nobukazu Araki
- Department of Histology and Cell Biology, School of Medicine, Kagawa University, Miki, Japan
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26
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Clague MJ, Urbé S. Data mining for traffic information. Traffic 2021; 21:162-168. [PMID: 31596015 DOI: 10.1111/tra.12702] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/19/2019] [Accepted: 09/19/2019] [Indexed: 12/23/2022]
Abstract
Modern cell biology is now rich with data acquired at the whole genome and proteome level. We can add value to this data through integration and application of specialist knowledge. To illustrate, we will focus on the SNARE and RAB proteins; key regulators of intracellular fusion specificity and organelle identity. We examine published mass spectrometry data to gain an estimate of protein copy number and organelle distribution in HeLa cells for each family member. We also survey recent global CRISPR/Cas9 screens for essential genes from these families. We highlight instances of co-essentiality with other genes across a large panel of cell lines that allows for the identification of functionally coherent clusters. Examples of such correlations include RAB10 with the SNARE protein Syntaxin4 (STX4) and RAB7/RAB21 with the WASH and the CCC (COMMD/CCDC22/CCDC93) complexes, both of which are linked to endosomal recycling pathways.
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Affiliation(s)
- Michael J Clague
- Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Sylvie Urbé
- Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
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27
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Raboso-Gallego J, Casado-García A, Jiang X, Isidro-Hernández M, Gentles AJ, Zhao S, Natkunam Y, Blanco O, Domínguez V, Pintado B, Alonso-López D, De Las Rivas J, Vicente-Dueñas C, Lossos IS, Sanchez-Garcia I. Conditional expression of HGAL leads to the development of diffuse large B-cell lymphoma in mice. Blood 2021; 137:1741-1753. [PMID: 33024996 PMCID: PMC8020264 DOI: 10.1182/blood.2020004996] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 09/22/2020] [Indexed: 12/23/2022] Open
Abstract
Diffuse large B-cell lymphomas (DLBCLs) are clinically and genetically heterogeneous tumors. Deregulation of diverse biological processes specific to B cells, such as B-cell receptor (BCR) signaling and motility regulation, contribute to lymphomagenesis. Human germinal center associated lymphoma (HGAL) is a B-cell-specific adaptor protein controlling BCR signaling and B lymphocyte motility. In normal B cells, it is expressed in germinal center (GC) B lymphocytes and promptly downregulated upon further differentiation. The majority of DLBCL tumors, primarily GC B-cell types, but also activated types, express HGAL. To investigate the consequences of constitutive expression of HGAL in vivo, we generated mice that conditionally express human HGAL at different stages of hematopoietic development using 3 restricted Cre-mediated approaches to initiate expression of HGAL in hematopoietic stem cells, pro-B cells, or GC B cells. Following immune stimulation, we observed larger GCs in mice in which HGAL expression was initiated in GC B cells. All 3 mouse strains developed DLBCL at a frequency of 12% to 30% starting at age 13 months, leading to shorter survival. Immunohistochemical studies showed that all analyzed tumors were of the GC B-cell type. Exon sequencing revealed mutations reported in human DLBCL. Our data demonstrate that constitutive enforced expression of HGAL leads to DLBCL development.
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Affiliation(s)
- Javier Raboso-Gallego
- Experimental Therapeutics and Translational Oncology Program, Instituto de Biología Molecular y Celular del Cáncer, Centro Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca (USAL), Salamanca, Spain
- Institute for Biomedical Research of Salamanca, Salamanca, Spain
| | - Ana Casado-García
- Experimental Therapeutics and Translational Oncology Program, Instituto de Biología Molecular y Celular del Cáncer, Centro Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca (USAL), Salamanca, Spain
- Institute for Biomedical Research of Salamanca, Salamanca, Spain
| | - Xiaoyu Jiang
- Division of Hematology, Department of Medicine, University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL
| | - Marta Isidro-Hernández
- Experimental Therapeutics and Translational Oncology Program, Instituto de Biología Molecular y Celular del Cáncer, Centro Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca (USAL), Salamanca, Spain
- Institute for Biomedical Research of Salamanca, Salamanca, Spain
| | - Andrew J Gentles
- Department of Medicine
- Department of Biomedical Data Science, and
| | - Shuchun Zhao
- Department of Pathology, Stanford University School of Medicine, Stanford, CA
| | - Yaso Natkunam
- Department of Pathology, Stanford University School of Medicine, Stanford, CA
| | - Oscar Blanco
- Institute for Biomedical Research of Salamanca, Salamanca, Spain
- Departamento de Anatomía Patológica, USAL, Salamanca, Spain
| | - Verónica Domínguez
- Transgenesis Facility Centro Nacional de Biotecnología-Centro de Biología Molecular Severo Ochoa (CNB-CBMSO), Consejo Superior de Investigaciones Cientificas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | - Belén Pintado
- Transgenesis Facility Centro Nacional de Biotecnología-Centro de Biología Molecular Severo Ochoa (CNB-CBMSO), Consejo Superior de Investigaciones Cientificas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | | | - Javier De Las Rivas
- Institute for Biomedical Research of Salamanca, Salamanca, Spain
- Bioinformatics and Functional Genomics Research Group, Cancer Research Center, CSIC-USAL, Salamanca, Spain; and
| | | | - Izidore S Lossos
- Division of Hematology, Department of Medicine, University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL
- Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, FL
| | - Isidro Sanchez-Garcia
- Experimental Therapeutics and Translational Oncology Program, Instituto de Biología Molecular y Celular del Cáncer, Centro Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca (USAL), Salamanca, Spain
- Institute for Biomedical Research of Salamanca, Salamanca, Spain
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Kadowaki T, Yamaguchi Y, Ogawa K, Tokuhisa M, Okamoto K, Tsukuba T. Rab44 isoforms similarly promote lysosomal exocytosis, but exhibit differential localization in mast cells. FEBS Open Bio 2021; 11:1165-1185. [PMID: 33641252 PMCID: PMC8016136 DOI: 10.1002/2211-5463.13133] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 02/03/2021] [Accepted: 02/26/2021] [Indexed: 12/11/2022] Open
Abstract
Rab44 is a large Rab GTPase containing a Rab GTPase domain and some additional N-terminal domains. We recently used Rab44-deficient mice to demonstrate that Rab44 regulates granule exocytosis in mast cells and IgE-mediated anaphylaxis. In mouse mast cells, Rab44 is expressed as two isoforms, namely, the long and short forms; however, the characteristics of these two isoforms remain unknown. Here, we investigated secretion and localization of the human long Rab44 isoform and the two mouse isoforms and their mutants expressed in rat basophilic leukemia (RBL)-2H3 cells. Expression of the human long isoform and both mouse isoforms caused an increase in β-hexosaminidase secretion. Confocal and quantitative analyses showed that both human and mouse long isoforms localized mainly to lysosomes while the mouse short isoform localized mainly to the ER. Live imaging with LysoTracker indicated that the size and number of LysoTracker-positive vesicles were altered by the various mutants. Ionomycin treatment partially altered localization of both long isoforms to the plasma membrane and cytosol, whereas it had little effect on colocalization of the short isoform with lysosomes. Mechanistically, both human and mouse Rab44 proteins interacted with vesicle-associated membrane protein 8 (VAMP8), a v-SNARE protein. Therefore, Rab44 isoforms similarly promote lysosomal exocytosis, but exhibit differential localization in mast cells.
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Affiliation(s)
- Tomoko Kadowaki
- Department of Frontier Oral Science, Graduate School of Biomedical Sciences, Nagasaki University, Japan
| | - Yu Yamaguchi
- Department of Dental Pharmacology, Graduate School of Biomedical Sciences, Nagasaki University, Japan
| | - Kohei Ogawa
- Department of Frontier Oral Science, Graduate School of Biomedical Sciences, Nagasaki University, Japan.,Department of Dental Pharmacology, Graduate School of Biomedical Sciences, Nagasaki University, Japan
| | - Mitsuko Tokuhisa
- Department of Frontier Oral Science, Graduate School of Biomedical Sciences, Nagasaki University, Japan.,Department of Dental Pharmacology, Graduate School of Biomedical Sciences, Nagasaki University, Japan
| | - Kuniaki Okamoto
- Department of Dental Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Japan
| | - Takayuki Tsukuba
- Department of Dental Pharmacology, Graduate School of Biomedical Sciences, Nagasaki University, Japan
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29
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Zhu L, Liu F, Hao Q, Feng T, Chen Z, Luo S, Xiao R, Sun M, Zhang T, Fan X, Zeng X, He J, Yuan P, Liu J, Ruiz M, Dupuis J, Hu Q. Dietary Geranylgeranyl Pyrophosphate Counteracts the Benefits of Statin Therapy in Experimental Pulmonary Hypertension. Circulation 2021; 143:1775-1792. [PMID: 33660517 DOI: 10.1161/circulationaha.120.046542] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND The mevalonate pathway generates endogenous cholesterol and intermediates including geranylgeranyl pyrophosphate (GGPP). By reducing GGPP production, statins exert pleiotropic or cholesterol-independent effects. The potential regulation of GGPP homeostasis through dietary intake and the interaction with concomitant statin therapy is unknown. METHODS We developed a sensitive high-pressure liquid chromatography technique to quantify dietary GGPP and conducted proteomics, qualitative real-time polymerase chain reaction screening, and Western blot to determine signaling cascades, gene expression, protein-protein interaction, and protein membrane trafficking in wild-type and transgenic rats. RESULTS GGPP contents were highly variable depending on food source that differentially regulated blood GGPP levels in rats. Diets containing intermediate and high GGPP reduced or abolished the effects of statins in rats with hypoxia- and monocrotaline-induced pulmonary hypertension: this was rescuable by methyl-allylthiosulfinate and methyl-allylthiosulfinate-rich garlic extracts. In human pulmonary artery smooth muscle cells treated with statins, hypoxia activated RhoA in an extracellular GGPP-dependent manner. Hypoxia-induced ROCK2 (Rho associated coiled-coil containing protein kinase 2)/Rab10 (Ras-related protein rab-10) signaling was prevented by statin and recovered by exogenous GGPP. The hypoxia-activated RhoA/ROCK2 pathway in rat and human pulmonary artery smooth muscle cells upregulated the expression of Ca2+-sensing receptor (CaSR) and HIMF (hypoxia-induced mitogenic factor), a mechanism attenuated by statin treatment and regained with exogenous GGPP. Rab10 knockdown almost abrogated hypoxia-promoted CaSR membrane trafficking, a process diminished by statin and resumed by exogenous GGPP. Hypoxia-induced pulmonary hypertension was reduced in rats with CaSR mutated at the binding motif of HIMF and the interaction between dietary GGPP and statin efficiency was abolished. In humans fed a high GGPP diet, blood GGPP levels were increased. This abolished statin-lowering effects on plasma GGPP, and also on hypoxia-enhanced RhoA activity of blood monocytes that was rescued by garlic extracts. CONCLUSIONS There is important dietary regulation of GGPP levels that interferes with the effects of statin therapy in experimental pulmonary hypertension. These observations rely on a key and central role of RhoA-ROCK2 cascade activation and Rab10-faciliated CaSR membrane trafficking with subsequent overexpression and binding of HIMF to CaSR. These findings warrant clinical investigation for the treatment of pulmonary hypertension and perhaps other diseases by combining statin with garlic-derived methyl-allylthiosulfinate or garlic extracts and thus circumventing dietary GGPP variations.
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Affiliation(s)
- Liping Zhu
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fangbo Liu
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qiang Hao
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tian Feng
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zeshuai Chen
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shengquan Luo
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rui Xiao
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Mengxiang Sun
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ting Zhang
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaohang Fan
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xianqin Zeng
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianguo He
- State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing (J.H.)
| | - Ping Yuan
- Department of Cardiopulmonary Circulation, Shanghai Pulmonary Hospital, Tongji University School of Medicine, China (P.Y., J.L.)
| | - Jinming Liu
- Department of Cardiopulmonary Circulation, Shanghai Pulmonary Hospital, Tongji University School of Medicine, China (P.Y., J.L.)
| | - Matthieu Ruiz
- Departments of Nutrition (M.R.), Université de Montréal, Canada.,Montreal Heart Institute Research Center, Canada (M.R., J.D.)
| | - Jocelyn Dupuis
- Medicine (J.D.), Université de Montréal, Canada.,Montreal Heart Institute Research Center, Canada (M.R., J.D.)
| | - Qinghua Hu
- Department of Pathophysiology, School of Basic Medicine (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., F.L., Q. Hao, T.F., Z.C., S.L., R.X., M.S., T.Z., X.F., X.Z., Q. Hu), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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30
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Lucken-Ardjomande Häsler S, Vallis Y, Pasche M, McMahon HT. GRAF2, WDR44, and MICAL1 mediate Rab8/10/11-dependent export of E-cadherin, MMP14, and CFTR ΔF508. J Cell Biol 2021; 219:151714. [PMID: 32344433 PMCID: PMC7199855 DOI: 10.1083/jcb.201811014] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 11/07/2019] [Accepted: 02/26/2020] [Indexed: 02/07/2023] Open
Abstract
In addition to the classical pathway of secretion, some transmembrane proteins reach the plasma membrane through alternative routes. Several proteins transit through endosomes and are exported in a Rab8-, Rab10-, and/or Rab11-dependent manner. GRAFs are membrane-binding proteins associated with tubules and vesicles. We found extensive colocalization of GRAF1b/2 with Rab8a/b and partial with Rab10. We identified MICAL1 and WDR44 as direct GRAF-binding partners. MICAL1 links GRAF1b/2 to Rab8a/b and Rab10, and WDR44 binds Rab11. Endogenous WDR44 labels a subset of tubular endosomes, which are closely aligned with the ER via binding to VAPA/B. With its BAR domain, GRAF2 can tubulate membranes, and in its absence WDR44 tubules are not observed. We show that GRAF2 and WDR44 are essential for the export of neosynthesized E-cadherin, MMP14, and CFTR ΔF508, three proteins whose exocytosis is sensitive to ER stress. Overexpression of dominant negative mutants of GRAF1/2, WDR44, and MICAL1 also interferes with it, facilitating future studies of Rab8/10/11-dependent exocytic pathways of central importance in biology.
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Affiliation(s)
| | - Yvonne Vallis
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | - Mathias Pasche
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | - Harvey T McMahon
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
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31
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Farmer T, Xie S, Naslavsky N, Stöckli J, James DE, Caplan S. Defining the protein and lipid constituents of tubular recycling endosomes. J Biol Chem 2021; 296:100190. [PMID: 33334886 PMCID: PMC7948492 DOI: 10.1074/jbc.ra120.015992] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/03/2020] [Accepted: 12/15/2020] [Indexed: 12/20/2022] Open
Abstract
Once internalized, receptors reach the sorting endosome and are either targeted for degradation or recycled to the plasma membrane, a process mediated at least in part by tubular recycling endosomes (TREs). TREs may be efficient for sorting owing to the ratio of large surface membrane area to luminal volume; following receptor segregation, TRE fission likely releases receptor-laden tubules and vesicles for recycling. Despite the importance of TRE networks for recycling, these unique structures remain poorly understood, and unresolved questions relate to their lipid and protein composition and biogenesis. Our previous studies have depicted the endocytic protein MICAL-L1 as an essential TRE constituent, and newer studies show a similar localization for the GTP-binding protein Rab10. We demonstrate that TREs are enriched in both phosphatidic acid (PA) and phosphatidylinositol-4,5-bisphosphate (PI(4,5)P2), supporting the idea of MICAL-L1 recruitment by PA and Rab10 recruitment via PI(4,5)P2. Using siRNA knock-down, we demonstrate that Rab10-marked TREs remain prominent in cells upon MICAL-L1 or Syndapin2 depletion. However, depletion of Rab10 or its interaction partner, EHBP1, led to loss of MICAL-L1-marked TREs. We next used phospholipase D inhibitors to decrease PA synthesis, acutely disrupt TREs, and enable monitoring of TRE regeneration after inhibitor washout. Rab10 depletion prevented TRE regeneration, whereas MICAL-L1 knock-down did not. It is surprising that EHBP1 depletion did not affect TRE regeneration under these conditions. Overall, our study supports a primary role for Rab10 and the requirement for PA and PI(4,5)P2 in TRE biogenesis and regeneration, with Rab10 likely linking the sorting endosome to motor proteins and the microtubule network.
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Affiliation(s)
- Trey Farmer
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Shuwei Xie
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Naava Naslavsky
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Jacqueline Stöckli
- Charles Perkins Centre, School of Life and Environmental Sciences, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - David E James
- Charles Perkins Centre, School of Life and Environmental Sciences, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Steve Caplan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska, USA; Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, USA.
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32
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Drucker A, Yoo BH, Khan IA, Choi D, Montermini L, Liu X, Jovanovic S, Younis T, Rosen KV. Trastuzumab-induced upregulation of a protein set in extracellular vesicles emitted by ErbB2-positive breast cancer cells correlates with their trastuzumab sensitivity. Breast Cancer Res 2020; 22:105. [PMID: 33023655 PMCID: PMC7541295 DOI: 10.1186/s13058-020-01342-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/16/2020] [Indexed: 12/27/2022] Open
Abstract
Background ErbB2/HER2 oncoprotein often drives breast cancers (BCs) which are treated with the anti-ErbB2 antibody trastuzumab. The efficacy of trastuzumab-based metastatic BC therapies is routinely assessed by imaging studies. Trastuzumab typically becomes ineffective in the case of this disease and is then replaced by other drugs. Biomarkers of BC trastuzumab response could allow imaging studies and the switch to other drugs to occur earlier than is now possible. Moreover, bone-only BC metastases can be hard to measure, and biomarkers of their trastuzumab response could facilitate further treatment decisions. Such biomarkers are presently unavailable. In this study, we searched for proteins whose levels in BC cell-emitted extracellular vesicles (EVs) potentially correlate with BC trastuzumab sensitivity. Methods We isolated EVs from cultured trastuzumab-sensitive and trastuzumab-resistant human BC cells before and after trastuzumab treatment and characterized these EVs by nanoparticle tracking analysis and electron microscopy. We found previously that ErbB2 drives BC by downregulating a pro-apoptotic protein PERP. We now tested whether trastuzumab-induced PERP upregulation in EVs emitted by cultured human BC cells correlates with their trastuzumab sensitivity. We also used mass spectrometry to search for additional proteins whose levels in such EVs reflect BC cell trastuzumab sensitivity. Once we identified proteins whose EV levels correlate with this sensitivity in culture, we explored the feasibility of testing whether their levels in the blood EVs of trastuzumab-treated metastatic BC patients correlate with patients’ response to trastuzumab-based treatments. Results We found that neither trastuzumab nor acquisition of trastuzumab resistance by BC cells affects the size or morphology of EVs emitted by cultured BC cells. We established that EV levels of proteins PERP, GNAS2, GNA13, ITB1, and RAB10 correlate with BC cell trastuzumab response. Moreover, these proteins were upregulated during trastuzumab-based therapies in the blood EVs of a pilot cohort of metastatic BC patients that benefited from these therapies but not in those derived from patients that failed such treatments. Conclusions Upregulation of a protein set in EVs derived from cultured breast tumor cells correlates with tumor cell trastuzumab sensitivity. It is feasible to further evaluate these proteins as biomarkers of metastatic BC trastuzumab response.
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Affiliation(s)
- Arik Drucker
- Department of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Byong Hoon Yoo
- Departments of Pediatrics & Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, Canada
| | - Iman Aftab Khan
- Departments of Pediatrics & Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, Canada
| | - Dongsic Choi
- Research Institute of the McGill University Health Centre, Glen Site, McGill University, Montreal, QC, Canada
| | - Laura Montermini
- Research Institute of the McGill University Health Centre, Glen Site, McGill University, Montreal, QC, Canada
| | - Xiaoyang Liu
- Departments of Pediatrics & Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, Canada
| | - Sanja Jovanovic
- Department of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Tallal Younis
- Department of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Kirill V Rosen
- Departments of Pediatrics & Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, Canada. .,Atlantic Research Centre, Rm C-304, CRC, 5849 University Avenue, PO Box 15000, Halifax, NS, B3H 4R2, Canada.
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Rivero-Ríos P, Romo-Lozano M, Fernández B, Fdez E, Hilfiker S. Distinct Roles for RAB10 and RAB29 in Pathogenic LRRK2-Mediated Endolysosomal Trafficking Alterations. Cells 2020; 9:cells9071719. [PMID: 32709066 PMCID: PMC7407826 DOI: 10.3390/cells9071719] [Citation(s) in RCA: 17] [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: 06/23/2020] [Revised: 07/12/2020] [Accepted: 07/13/2020] [Indexed: 12/14/2022] Open
Abstract
Summary Statement Pathogenic LRRK2 expression causes endolysosomal trafficking alterations by impairing RAB10 function, and these alterations are rescued by RAB29 independent of its Golgi localization. Abstract Mutations in the gene encoding leucine-rich repeat kinase 2 (LRRK2) cause familial Parkinson’s disease, and sequence variations are associated with the sporadic form of the disease. LRRK2 phosphorylates a subset of RAB proteins implicated in secretory and recycling trafficking pathways, including RAB8A and RAB10. Another RAB protein, RAB29, has been reported to recruit LRRK2 to the Golgi, where it stimulates its kinase activity. Our previous studies revealed that G2019S LRRK2 expression or knockdown of RAB8A deregulate epidermal growth factor receptor (EGFR) trafficking, with a concomitant accumulation of the receptor in a RAB4-positive recycling compartment. Here, we show that the G2019S LRRK2-mediated EGFR deficits are mimicked by knockdown of RAB10 and rescued by expression of active RAB10. By contrast, RAB29 knockdown is without effect, but expression of RAB29 also rescues the pathogenic LRRK2-mediated trafficking deficits independently of Golgi integrity. Our data suggest that G2019S LRRK2 deregulates endolysosomal trafficking by impairing the function of RAB8A and RAB10, while RAB29 positively modulates non-Golgi-related trafficking events impaired by pathogenic LRRK2.
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Affiliation(s)
- Pilar Rivero-Ríos
- Institute of Parasitology and Biomedicine “López-Neyra”, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016 Granada, Spain; (P.R.-R.); (M.R.-L.); (B.F.); (E.F.)
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Maria Romo-Lozano
- Institute of Parasitology and Biomedicine “López-Neyra”, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016 Granada, Spain; (P.R.-R.); (M.R.-L.); (B.F.); (E.F.)
| | - Belén Fernández
- Institute of Parasitology and Biomedicine “López-Neyra”, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016 Granada, Spain; (P.R.-R.); (M.R.-L.); (B.F.); (E.F.)
| | - Elena Fdez
- Institute of Parasitology and Biomedicine “López-Neyra”, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016 Granada, Spain; (P.R.-R.); (M.R.-L.); (B.F.); (E.F.)
| | - Sabine Hilfiker
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
- Correspondence:
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34
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Petridi S, Middleton CA, Ugbode C, Fellgett A, Covill L, Elliott CJH. In Vivo Visual Screen for Dopaminergic Rab ↔ LRRK2-G2019S Interactions in Drosophila Discriminates Rab10 from Rab3. G3 (BETHESDA, MD.) 2020; 10:1903-1914. [PMID: 32321836 PMCID: PMC7263684 DOI: 10.1534/g3.120.401289] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 04/22/2020] [Indexed: 02/07/2023]
Abstract
LRRK2 mutations cause Parkinson's, but the molecular link from increased kinase activity to pathological neurodegeneration remains undetermined. Previous in vitro assays indicate that LRRK2 substrates include at least 8 Rab GTPases. We have now examined this hypothesis in vivo in a functional, electroretinogram screen, expressing each Rab with/without LRRK2-G2019S in selected Drosophila dopaminergic neurons. Our screen discriminated Rab10 from Rab3. The strongest Rab/LRRK2-G2019S interaction is with Rab10; the weakest with Rab3. Rab10 is expressed in a different set of dopaminergic neurons from Rab3. Thus, anatomical and physiological patterns of Rab10 are related. We conclude that Rab10 is a valid substrate of LRRK2 in dopaminergic neurons in vivo We propose that variations in Rab expression contribute to differences in the rate of neurodegeneration recorded in different dopaminergic nuclei in Parkinson's.
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Affiliation(s)
- Stavroula Petridi
- Department of Biology and York Biomedical Research Institute, University of York, YO1 5DD, UK
| | - C Adam Middleton
- Department of Biology and York Biomedical Research Institute, University of York, YO1 5DD, UK
| | - Chris Ugbode
- Department of Biology and York Biomedical Research Institute, University of York, YO1 5DD, UK
| | - Alison Fellgett
- Department of Biology and York Biomedical Research Institute, University of York, YO1 5DD, UK
| | - Laura Covill
- Department of Biology and York Biomedical Research Institute, University of York, YO1 5DD, UK
| | - Christopher J H Elliott
- Department of Biology and York Biomedical Research Institute, University of York, YO1 5DD, UK
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35
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Abstract
With over 30% of current medications targeting this family of proteins, G-protein-coupled receptors (GPCRs) remain invaluable therapeutic targets. However, due to their unique physicochemical properties, their low abundance, and the lack of highly specific antibodies, GPCRs are still challenging to study in vivo. To overcome these limitations, we combined here transgenic mouse models and proteomic analyses in order to resolve the interactome of the δ-opioid receptor (DOPr) in its native in vivo environment. Given its analgesic properties and milder undesired effects than most clinically prescribed opioids, DOPr is a promising alternative therapeutic target for chronic pain management. However, the molecular and cellular mechanisms regulating its signaling and trafficking remain poorly characterized. We thus performed liquid chromatography-tandem mass spectrometry (LC-MS/MS) analyses on brain homogenates of our newly generated knockin mouse expressing a FLAG-tagged version of DOPr and revealed several endogenous DOPr interactors involved in protein folding, trafficking, and signal transduction. The interactions with a few identified partners such as VPS41, ARF6, Rabaptin-5, and Rab10 were validated. We report an approach to characterize in vivo interacting proteins of GPCRs, the largest family of membrane receptors with crucial implications in virtually all physiological systems.
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36
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Wallings RL, Herrick MK, Tansey MG. LRRK2 at the Interface Between Peripheral and Central Immune Function in Parkinson's. Front Neurosci 2020; 14:443. [PMID: 32508566 PMCID: PMC7253584 DOI: 10.3389/fnins.2020.00443] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 04/09/2020] [Indexed: 12/20/2022] Open
Abstract
It is becoming increasingly accepted that there is an interplay between the peripheral immune response and neuroinflammation in the pathophysiology of Parkinson's disease (PD). Mutations in the leucine-rich-repeat kinase 2 (LRRK2) gene are associated with familial and sporadic cases of PD but are also found in immune-related disorders, such as inflammatory bowel disease (IBD) and leprosy. Furthermore, LRRK2 has been associated with bacterial infections such as Mycobacterium tuberculosis and Salmonella typhimurium. Recent evidence suggests a role of LRRK2 in the regulation of the immune system and modulation of inflammatory responses, at a systemic level, with LRRK2 functionally implicated in both the immune system of the central nervous system (CNS) and the periphery. It has therefore been suggested that peripheral immune signaling may play an important role in the regulation of neurodegeneration in LRRK2 as well as non-LRRK2-associated PD. This review will discuss the current evidence for this hypothesis and will provide compelling rationale for placing LRRK2 at the interface between peripheral immune responses and neuroinflammation.
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Affiliation(s)
- Rebecca L. Wallings
- Department of Neuroscience and Center for Translational Research in Neurodegenerative Disease, University of Florida College of Medicine, Gainesville, FL, United States
| | - Mary K. Herrick
- Department of Neuroscience and Center for Translational Research in Neurodegenerative Disease, University of Florida College of Medicine, Gainesville, FL, United States
- Laney Graduate School, Emory University, Atlanta, GA, United States
| | - Malú Gámez Tansey
- Department of Neuroscience and Center for Translational Research in Neurodegenerative Disease, University of Florida College of Medicine, Gainesville, FL, United States
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37
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Zhu Y, Xiao Y, Kong D, Liu H, Chen X, Chen Y, Zhu T, Peng Y, Zhai W, Hu C, Chen H, Suo Lang SZ, Guo A, Niu J. Down-Regulation of miR-378d Increased Rab10 Expression to Help Clearance of Mycobacterium tuberculosis in Macrophages. Front Cell Infect Microbiol 2020; 10:108. [PMID: 32257967 PMCID: PMC7094154 DOI: 10.3389/fcimb.2020.00108] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 02/27/2020] [Indexed: 01/05/2023] Open
Abstract
Mycobacterium tuberculosis (M. tb) can survive in the hostile microenvironment of cells by escaping host surveillance, but the molecular mechanisms are far from being fully understood. MicroRNAs might be involved in regulation of this intracellular process. By RNAseq of M. tb-infected PMA-differentiated THP-1 macrophages, we previously discovered down-regulation of miR-378d during M. tb infection. This study aimed to investigate the roles of miR-378d in M. tb infection of THP-1 cells by using a miR-378d mimic and inhibitor. First, M. tb infection was confirmed to decrease miR-378d expression in THP-1 and Raw 264.7 macrophages. Then, it was demonstrated that miR-378d mimic promoted, while its inhibitor decreased, M. tb survival in THP-1 cells. Further, the miR-378d mimic suppressed, while its inhibitor enhanced the protein production of IL-1β, TNF-α, IL-6, and Rab10 expression. By using siRNA of Rab10 (siRab10) to knock-down the Rab10 gene in THP-1 with or without miR-378d inhibitor transfection, Rab10 was determined to be a miR-378d target during M. tb infection. In addition, a dual luciferase reporter assay with the Rab10 wild-type sequence and mutant for miR-378d binding sites confirmed Rab10 as the target of miR-378d associated with M. tb infection. The involvement of four signal pathways NF-κB, P38, JNK, and ERK in miR-378d regulation was determined by detecting the effect of their respective inhibitors on miR-378d expression, and miR-378d inhibitor on activation of these four signal pathways. As a result, activation of the NF-κB signaling pathway was associated with the down-regulation of miR-378d. In conclusion, during M. tb infection of macrophages, miR-378d was down-regulated and functioned on decreasing M. tb intracellular survival by targeting Rab10 and the process was regulated by activation of the NF-κB and induction of pro-inflammatory cytokines IL-1β, TNF-α, IL-6. These findings shed light on further understanding the defense mechanisms in macrophages against M. tb infection.
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Affiliation(s)
- Yifan Zhu
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Yao Xiao
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Delai Kong
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Han Liu
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Xi Chen
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Yingyu Chen
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Tingting Zhu
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Yongchong Peng
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Wenjun Zhai
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Changmin Hu
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Huanchun Chen
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Si Zhu Suo Lang
- Department of Animal Sciences, Tibet Agricultural and Animal Husbandry College, Linzhi, China
| | - Aizhen Guo
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Development of Veterinary Diagnostic Products, Key Laboratory of Ruminant Bio-Products of Ministry of Agriculture and Rural Affairs, Huazhong Agriculture University, Wuhan, China.,Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, International Research Center for Animal Disease, Ministry of Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jiaqiang Niu
- Department of Animal Sciences, Tibet Agricultural and Animal Husbandry College, Linzhi, China
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38
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LRRK2 regulation of immune-pathways and inflammatory disease. Biochem Soc Trans 2020; 47:1581-1595. [PMID: 31769472 PMCID: PMC6925522 DOI: 10.1042/bst20180463] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 11/06/2019] [Accepted: 11/07/2019] [Indexed: 12/13/2022]
Abstract
Mutations in the leucine-rich-repeat kinase 2 (LRRK2) gene are associated with familial and sporadic cases of Parkinson's disease but are also found in immune-related disorders such as inflammatory bowel disease, tuberculosis and leprosy. LRRK2 is highly expressed in immune cells and has been functionally linked to pathways pertinent to immune cell function, such as cytokine release, autophagy and phagocytosis. Here, we examine the current understanding of the role of LRRK2 kinase activity in pathway regulation in immune cells, drawing upon data from multiple diseases associated with LRRK2 to highlight the pleiotropic effects of LRRK2 in different cell types. We discuss the role of the bona fide LRRK2 substrate, Rab GTPases, in LRRK2 pathway regulation as well as downstream events in the autophagy and inflammatory pathways.
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39
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Solinger JA, Rashid HO, Prescianotto-Baschong C, Spang A. FERARI is required for Rab11-dependent endocytic recycling. Nat Cell Biol 2020; 22:213-224. [PMID: 31988382 DOI: 10.1038/s41556-019-0456-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 12/16/2019] [Indexed: 01/22/2023]
Abstract
Endosomal transport is essential for cellular organization and compartmentalization and cell-cell communication. Sorting endosomes provide a crossroads for various trafficking pathways and determine recycling, secretion or degradation of proteins. The organization of these processes requires membrane-tethering factors to coordinate Rab GTPase function with membrane fusion. Here, we report a conserved tethering platform that acts in the Rab11 recycling pathways at sorting endosomes, which we name factors for endosome recycling and Rab interactions (FERARI). The Rab-binding module of FERARI consists of Rab11FIP5 and rabenosyn-5/RABS-5, while the SNARE-interacting module comprises VPS45 and VIPAS39. Unexpectedly, the membrane fission protein EHD1 is also a FERARI component. Thus, FERARI appears to combine fusion activity through the SM protein VPS45 with pinching activity through EHD1 on SNX-1-positive endosomal membranes. We propose that coordination of fusion and pinching through a kiss-and-run mechanism drives cargo at endosomes into recycling pathways.
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Affiliation(s)
| | | | | | - Anne Spang
- Biozentrum, University of Basel, Basel, Switzerland.
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40
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Lara Ordónez AJ, Fernández B, Fdez E, Romo-Lozano M, Madero-Pérez J, Lobbestael E, Baekelandt V, Aiastui A, López de Munaín A, Melrose HL, Civiero L, Hilfiker S. RAB8, RAB10 and RILPL1 contribute to both LRRK2 kinase-mediated centrosomal cohesion and ciliogenesis deficits. Hum Mol Genet 2019; 28:3552-3568. [PMID: 31428781 PMCID: PMC6927464 DOI: 10.1093/hmg/ddz201] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 08/10/2019] [Accepted: 08/12/2019] [Indexed: 02/03/2023] Open
Abstract
Mutations in the LRRK2 kinase are the most common cause of familial Parkinson's disease, and variants increase risk for the sporadic form of the disease. LRRK2 phosphorylates multiple RAB GTPases including RAB8A and RAB10. Phosphorylated RAB10 is recruited to centrosome-localized RILPL1, which may interfere with ciliogenesis in a disease-relevant context. Our previous studies indicate that the centrosomal accumulation of phosphorylated RAB8A causes centrosomal cohesion deficits in dividing cells, including in peripheral patient-derived cells. Here, we show that both RAB8 and RAB10 contribute to the centrosomal cohesion deficits. Pathogenic LRRK2 causes the centrosomal accumulation not only of phosho-RAB8 but also of phospho-RAB10, and the effects on centrosomal cohesion are dependent on RAB8, RAB10 and RILPL1. Conversely, the pathogenic LRRK2-mediated ciliogenesis defects correlate with the centrosomal accumulation of both phospho-RAB8 and phospho-RAB10. LRRK2-mediated centrosomal cohesion and ciliogenesis alterations are observed in patient-derived peripheral cells, as well as in primary astrocytes from mutant LRRK2 mice, and are reverted upon LRRK2 kinase inhibition. These data suggest that the LRRK2-mediated centrosomal cohesion and ciliogenesis defects are distinct cellular readouts of the same underlying phospho-RAB8/RAB10/RILPL1 nexus and highlight the possibility that either centrosomal cohesion and/or ciliogenesis alterations may serve as cellular biomarkers for LRRK2-related PD.
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Affiliation(s)
- Antonio Jesús Lara Ordónez
- Institute of Parasitology and Biomedicine ‘López-Neyra’, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, Granada 18016, Spain
| | - Belén Fernández
- Institute of Parasitology and Biomedicine ‘López-Neyra’, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, Granada 18016, Spain
| | - Elena Fdez
- Institute of Parasitology and Biomedicine ‘López-Neyra’, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, Granada 18016, Spain
| | - María Romo-Lozano
- Institute of Parasitology and Biomedicine ‘López-Neyra’, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, Granada 18016, Spain
| | - Jesús Madero-Pérez
- Institute of Parasitology and Biomedicine ‘López-Neyra’, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, Granada 18016, Spain
| | - Evy Lobbestael
- Laboratory for Neurobiology and Gene Therapy, KU Leuven, Leuven 3000, Belgium
| | - Veerle Baekelandt
- Laboratory for Neurobiology and Gene Therapy, KU Leuven, Leuven 3000, Belgium
| | - Ana Aiastui
- Division of Neurosciences, Instituto Biodonostia, San Sebastián, Spain
- Department of Neurology, Hospital Universitario Donostia, San Sebastián, Spain
| | - Adolfo López de Munaín
- Division of Neurosciences, Instituto Biodonostia, San Sebastián, Spain
- Department of Neurology, Hospital Universitario Donostia, San Sebastián, Spain
| | - Heather L Melrose
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL 32224, USA
| | - Laura Civiero
- Laboratory of Cellular Physiology and Molecular Biophysics, Department of Biology, University of Padua, Padua 35121, Italy
| | - Sabine Hilfiker
- Institute of Parasitology and Biomedicine ‘López-Neyra’, Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, Granada 18016, Spain
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
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41
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Zhou Z, Huang F. Long Non-Coding RNA LINC00152 Regulates Cell Proliferation, Migration And Invasion In Esophageal Squamous Cell Carcinoma Via miR-107/Rab10 Axis. Onco Targets Ther 2019; 12:8553-8567. [PMID: 31802892 PMCID: PMC6802625 DOI: 10.2147/ott.s221515] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 09/20/2019] [Indexed: 12/15/2022] Open
Abstract
Background Esophageal squamous cell carcinoma (ESCC) is a common malignant tumor in East Asia. Emerging evidence indicated that long intergenic non-coding RNA 152 (LINC00152) acts as an oncogene in many types of cancers including ESCC. This study aims to identify the biological mechanisms of LINC00152 in ESCC, hinting for new therapeutic target for ESCC patients. Methods The levels of LINC00152, microRNA-107 (miR-107) and Ras-related protein Rab-10 (Rab10) were measured in ESCC tissues and cells using qRT-PCR. The protein level of Rab10 was measured by Western blot assay. The putative target of LINC00152 or miR-107 was searched using starBase v2.0 and TargetScan online databases, and dual-luciferase reporter assay was conducted to detect the interaction between miR-107 and LINC00152 or Rab10. The cell viability was monitored by CCK8 assay, and the abilities of migration and invasion were assessed by Transwell assay, respectively. The mice model experiments were constructed to affirm the biological role of LINC00152 in vivo. Results LINC00152, Rab10 was significantly upregulated, and miR-107 was strikingly down-regulated in ESCC tissues and cell lines (TE-1 and KYSE30). LINC00152 was verified as a sponge for miR-107, and Rab10 was a direct target of miR-107. LINC00152 depletion decreased cell viability and abilities of migration and invasion by regulating miR-107 in vitro and blocked xenograft tumor growth in vivo. The overexpression of miR-107 reduced cell viability and the abilities of migration and invasion by modulating Rab10. LINC00152 positively regulated Rab10 expression by sponging miR-107. Conclusion In this study, we found that LINC00152 modulated Rab10 to promote cell proliferation, migration and invasion in ESCC by sponging miR-107. This new regulatory network may provide a novel therapeutic target for ESCC patients.
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Affiliation(s)
- Zhigang Zhou
- Department of Thoracic Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang 050051, Hebei, People's Republic of China
| | - Fei Huang
- Department of Cardio-Thoracic Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang 050051, Hebei, People's Republic of China
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42
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Rab GTPases: Switching to Human Diseases. Cells 2019; 8:cells8080909. [PMID: 31426400 PMCID: PMC6721686 DOI: 10.3390/cells8080909] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 08/13/2019] [Accepted: 08/14/2019] [Indexed: 02/07/2023] Open
Abstract
Rab proteins compose the largest family of small GTPases and control the different steps of intracellular membrane traffic. More recently, they have been shown to also regulate cell signaling, division, survival, and migration. The regulation of these processes generally occurs through recruitment of effectors and regulatory proteins, which control the association of Rab proteins to membranes and their activation state. Alterations in Rab proteins and their effectors are associated with multiple human diseases, including neurodegeneration, cancer, and infections. This review provides an overview of how the dysregulation of Rab-mediated functions and membrane trafficking contributes to these disorders. Understanding the altered dynamics of Rabs and intracellular transport defects might thus shed new light on potential therapeutic strategies.
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43
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Enculescu C, Kerr ED, Yeo KYB, Schenk G, Fortes MRS, Schulz BL. Proteomics Reveals Profound Metabolic Changes in the Alcohol Use Disorder Brain. ACS Chem Neurosci 2019; 10:2364-2373. [PMID: 30807102 DOI: 10.1021/acschemneuro.8b00660] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Changes in brain metabolism are a hallmark of alcohol use disorder (AUD). Determining how AUD changes the brain proteome is critical for understanding the effects of alcohol consumption on biochemical processes in the brain. We used data-independent acquisition mass spectrometry proteomics to study differences in the abundance of proteins associated with AUD in prefrontal lobe and motor cortex from autopsy brain. AUD had a substantial effect on the overall brain proteome exceeding the inherent differences between brain regions. Proteins associated with glycolysis, trafficking, the cytoskeleton, and excitotoxicity were altered in abundance in AUD. We observed extensive changes in the abundance of key metabolic enzymes, consistent with a switch from glucose to acetate utilization in the AUD brain. We propose that metabolic adaptations allowing efficient acetate utilization contribute to ethanol dependence in AUD.
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Affiliation(s)
- Charmaine Enculescu
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - Edward D. Kerr
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - K. Y. Benjamin Yeo
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - Marina R. S. Fortes
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - Benjamin L. Schulz
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
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44
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Sundararajan L, Stern J, Miller DM. Mechanisms that regulate morphogenesis of a highly branched neuron in C. elegans. Dev Biol 2019; 451:53-67. [PMID: 31004567 DOI: 10.1016/j.ydbio.2019.04.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 03/09/2019] [Accepted: 04/05/2019] [Indexed: 02/08/2023]
Abstract
The shape of an individual neuron is linked to its function with axons sending signals to other cells and dendrites receiving them. Although much is known of the mechanisms for axonal outgrowth, the striking complexity of dendritic architecture has hindered efforts to uncover pathways that direct dendritic branching. Here we review the results of an experimental strategy that exploits the power of genetic analysis and live cell imaging of the PVD sensory neuron in C. elegans to reveal key molecular drivers of dendrite morphogenesis.
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Affiliation(s)
- Lakshmi Sundararajan
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37240, USA
| | - Jamie Stern
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37240, USA
| | - David M Miller
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37240, USA.
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45
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Abstract
PURPOSE OF REVIEW Over the last decade over 40 loci have been associated with risk of Alzheimer's disease (AD). However, most studies have either focused on identifying risk loci or performing unbiased screens without a focus on protective variation in AD. Here, we provide a review of known protective variants in AD and their putative mechanisms of action. Additionally, we recommend strategies for finding new protective variants. RECENT FINDINGS Recent Genome-Wide Association Studies have identified both common and rare protective variants associated with AD. These include variants in or near APP, APOE, PLCG2, MS4A, MAPT-KANSL1, RAB10, ABCA1, CCL11, SORL1, NOCT, SCL24A4-RIN3, CASS4, EPHA1, SPPL2A, and NFIC. SUMMARY There are very few protective variants with functional evidence and a derived allele with a frequency below 20%. Additional fine mapping and multi-omic studies are needed to further validate and characterize known variants as well as specialized genome-wide scans to identify novel variants.
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Affiliation(s)
- Shea J Andrews
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Equal first author
| | - Brian Fulton-Howard
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Equal first author
| | - Alison Goate
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
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46
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Kinase activity of mutant LRRK2 manifests differently in hetero-dimeric vs. homo-dimeric complexes. Biochem J 2019; 476:559-579. [PMID: 30670570 DOI: 10.1042/bcj20180589] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 01/12/2019] [Accepted: 01/17/2019] [Indexed: 01/04/2023]
Abstract
The Parkinson's disease (PD) protein leucine-rich repeat kinase 2 (LRRK2) exists as a mixture of monomeric and dimeric species, with its kinase activity highly concentrated in the dimeric conformation of the enzyme. We have adapted the proximity biotinylation approach to study the formation and activity of LRRK2 dimers isolated from cultured cells. We find that the R1441C and I2020T mutations both enhance the rate of dimer formation, whereas, the G2019S kinase domain mutant is similar to WT, and the G2385R risk factor variant de-stabilizes dimers. Interestingly, we find a marked departure in the kinase activity between G2019S-LRRK2 homo-dimers and wild-type-G2019S hetero-dimers. While the homo-dimeric G2019S-LRRK2 exhibits the typical robust enhancement of kinase activity, hetero-dimers comprised of wild-type (WT) and G2019S-LRRK2 exhibit kinase activity similar to WT. Dimeric complexes of specific mutant forms of LRRK2 show reduced stability following an in vitro kinase reaction, in LRRK2 mutants for which the kinase activity is similar to WT. Phosphorylation of the small GTPase Rab10 follows a similar pattern in which hetero-dimers of WT and mutant LRRK2 show similar levels of phosphorylation of Rab10 to WT homo-dimers; while the levels of pRab10 are significantly increased in cells expressing mutant homo-dimers. Interestingly, while the risk variant G2385R leads to a de-stabilization of LRRK2 dimers, those dimers possess significantly elevated kinase activity. The vast majority of familial LRRK2-dependent PD cases are heterozygous; thus, these findings raise the possibility that a crucial factor in disease pathogenesis may be the accumulation of homo-dimeric mutant LRRK2.
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47
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Abstract
The Golgi apparatus is a central sorting station in the cell. It receives newly synthesized molecules from the endoplasmic reticulum and directs them to different subcellular destinations, such as the plasma membrane or the endocytic pathway. Importantly, in the last few years, it has emerged that the maintenance of Golgi structure is connected to the proper regulation of membrane trafficking. Rab proteins are small GTPases that are considered to be the master regulators of the intracellular membrane trafficking. Several of the over 60 human Rabs are involved in the regulation of transport pathways at the Golgi as well as in the maintenance of its architecture. This chapter will summarize the different roles of Rab GTPases at the Golgi, both as regulators of membrane transport, scaffold, and tethering proteins and in preserving the structure and function of this organelle.
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48
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Tavana JP, Rosene M, Jensen NO, Ridge PG, Kauwe JS, Karch CM. RAB10: an Alzheimer's disease resilience locus and potential drug target. Clin Interv Aging 2018; 14:73-79. [PMID: 30643396 PMCID: PMC6312396 DOI: 10.2147/cia.s159148] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Alzheimer’s disease (AD) is mainly a late-onset neurodegenerative disorder. Substantial efforts have been made to solve the complex genetic architecture of AD as a means to identify therapeutic targets. Unfortunately, to date, no disease-altering therapeutics have been developed. As therapeutics are likely to be most effective in the early stages of disease (ie, before the onset of symptoms), a recent focus of AD research has been the identification of protective factors that prevent disease. One example is the discovery of a rare variant in the 3′-UTR of RAB10 that is protective for AD. Here, we review the possible genetic, molecular, and functional role of RAB10 in AD and potential therapeutic approaches to target RAB10.
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Affiliation(s)
- Justina P Tavana
- Department of Biology, Brigham Young University, Provo, UT 84602, USA
| | - Matthew Rosene
- Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA,
| | - Nick O Jensen
- Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA,
| | - Perry G Ridge
- Department of Biology, Brigham Young University, Provo, UT 84602, USA
| | - John Sk Kauwe
- Department of Biology, Brigham Young University, Provo, UT 84602, USA.,Department of Neuroscience, Brigham Young University, Provo, UT 84602, USA
| | - Celeste M Karch
- Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA, .,Hope Center for Neurological Disorders, Washington University in St Louis, St Louis, MO, USA,
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Chemical biology probes of mammalian GLUT structure and function. Biochem J 2018; 475:3511-3534. [PMID: 30459202 PMCID: PMC6243331 DOI: 10.1042/bcj20170677] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 10/11/2018] [Accepted: 10/11/2018] [Indexed: 12/14/2022]
Abstract
The structure and function of glucose transporters of the mammalian GLUT family of proteins has been studied over many decades, and the proteins have fascinated numerous research groups over this time. This interest is related to the importance of the GLUTs as archetypical membrane transport facilitators, as key limiters of the supply of glucose to cell metabolism, as targets of cell insulin and exercise signalling and of regulated membrane traffic, and as potential drug targets to combat cancer and metabolic diseases such as type 2 diabetes and obesity. This review focusses on the use of chemical biology approaches and sugar analogue probes to study these important proteins.
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