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Zhou Y, Li T, Zhang Y, Zhang N, Guo Y, Gao X, Peng W, Shu S, Zhao C, Cui D, Sun H, Sun Y, Liu J, Tang J, Zhang R, Pu J. BAG6 inhibits influenza A virus replication by inducing viral polymerase subunit PB2 degradation and perturbing RdRp complex assembly. PLoS Pathog 2024; 20:e1012110. [PMID: 38498560 PMCID: PMC10977894 DOI: 10.1371/journal.ppat.1012110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 03/28/2024] [Accepted: 03/09/2024] [Indexed: 03/20/2024] Open
Abstract
The interaction between influenza A virus (IAV) and host proteins is an important process that greatly influences viral replication and pathogenicity. PB2 protein is a subunit of viral ribonucleoprotein (vRNP) complex playing distinct roles in viral transcription and replication. BAG6 (BCL2-associated athanogene 6) as a multifunctional host protein participates in physiological and pathological processes. Here, we identify BAG6 as a new restriction factor for IAV replication through targeting PB2. For both avian and human influenza viruses, overexpression of BAG6 reduced viral protein expression and virus titers, whereas deletion of BAG6 significantly enhanced virus replication. Moreover, BAG6-knockdown mice developed more severe clinical symptoms and higher viral loads upon IAV infection. Mechanistically, BAG6 restricted IAV transcription and replication by inhibiting the activity of viral RNA-dependent RNA polymerase (RdRp). The co-immunoprecipitation assays showed BAG6 specifically interacted with the N-terminus of PB2 and competed with PB1 for RdRp complex assembly. The ubiquitination assay indicated that BAG6 promoted PB2 ubiquitination at K189 residue and targeted PB2 for K48-linked ubiquitination degradation. The antiviral effect of BAG6 necessitated its N-terminal region containing a ubiquitin-like (UBL) domain (17-92aa) and a PB2-binding domain (124-186aa), which are synergistically responsible for viral polymerase subunit PB2 degradation and perturbing RdRp complex assembly. These findings unravel a novel antiviral mechanism via the interaction of viral PB2 and host protein BAG6 during avian or human influenza virus infection and highlight a potential application of BAG6 for antiviral drug development.
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Affiliation(s)
- Yong Zhou
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Tian Li
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Yunfan Zhang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Nianzhi Zhang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Yuxin Guo
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Xiaoyi Gao
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Wenjing Peng
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Sicheng Shu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Chuankuo Zhao
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Di Cui
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Honglei Sun
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Yipeng Sun
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jinhua Liu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jun Tang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Rui Zhang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Juan Pu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
- Department of Preventive Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing, China
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Wang Y, Dong A, Jin M, Li S, Duan Y. TEP RNA: a new frontier for early diagnosis of NSCLC. J Cancer Res Clin Oncol 2024; 150:97. [PMID: 38372784 PMCID: PMC10876732 DOI: 10.1007/s00432-024-05620-w] [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: 12/11/2023] [Accepted: 01/10/2024] [Indexed: 02/20/2024]
Abstract
BACKGROUND Non-small cell lung cancer (NSCLC) is the most common type of lung cancer (LC), which is the leading cause of tumor mortality. In recent years, compared with tissue biopsy, which is the diagnostic gold standard for tumor diagnosis, Liquid biopsy (LB) is considered to be a more minimally invasive, sensitive, and safer alternative or auxiliary diagnostic method. However, the current value of LB in early diagnosis of LC is not ideal, so it is particularly important to study the changes in blood composition during the process of tumorigenesis and find more sensitive biomarkers. PURPOSE Platelets are a type of abundant blood cells that carry a large amount of RNA. In the LC regulatory network, activated platelets play an important role in the process of tumorigenesis, development, and metastasis. In order to identify predictive liquid biopsy biomarkers for the diagnosis of NSCLC, we summarized the development and function of platelets, the interaction between platelets and tumors, the value of TEP RNA in diagnosis, prognosis, and treatment of NSCLC, and the method for detecting TEP RNA of NSCLC in this article. CONCLUSION The application of platelets in the diagnosis and treatment of NSCLC remains at a nascent stage. In addition to the drawbacks of low platelet count and complex experimental processes, the diagnostic accuracy of TEP RNA-seq for cancer in different populations still needs to be improved and validated. At present, a large number of studies have confirmed significant differences in the expression of TEP RNA in platelets between NSCLC patients and healthy individuals. Continuous exploration of the diagnostic value of TEP RNA in NSCLC is of utmost importance. The integration of NSCLC platelet-related markers with other NSCLC markers can improve current tumor diagnosis and prognostic evaluation systems, providing broad prospects in tumor screening, disease monitoring, and prognosis assessment.
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Affiliation(s)
- Yuan Wang
- Clinical Laboratory, The First Affiliated Hospital of Weifang Medical University (Weifang People's Hospital), Weifang Medical University, Weifang, 261000, Shandong, China
- Department of Clinical Laboratory Science, Weifang Medical University, Weifang, 261000, Shandong, China
| | - Aiping Dong
- Clinical Laboratory, The First Affiliated Hospital of Weifang Medical University (Weifang People's Hospital), Weifang Medical University, Weifang, 261000, Shandong, China
| | - Minhan Jin
- Clinical Laboratory, The First Affiliated Hospital of Weifang Medical University (Weifang People's Hospital), Weifang Medical University, Weifang, 261000, Shandong, China
- Department of Clinical Laboratory Science, Weifang Medical University, Weifang, 261000, Shandong, China
| | - Shirong Li
- Clinical Laboratory, The First Affiliated Hospital of Weifang Medical University (Weifang People's Hospital), Weifang Medical University, Weifang, 261000, Shandong, China.
| | - Yang Duan
- Clinical Laboratory, The First Affiliated Hospital of Weifang Medical University (Weifang People's Hospital), Weifang Medical University, Weifang, 261000, Shandong, China.
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Enjo-Barreiro JR, Ruano-Ravina A, Pérez-Ríos M, Kelsey K, Barros-Dios JM, Varela-Lema L. Genome Wide Association Studies in Small-Cell Lung Cancer. A Systematic Review. Clin Lung Cancer 2024; 25:9-17. [PMID: 37940411 DOI: 10.1016/j.cllc.2023.10.002] [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: 05/12/2023] [Revised: 08/28/2023] [Accepted: 10/09/2023] [Indexed: 11/10/2023]
Abstract
Small cell lung cancer (SCLC) is one of the deadliest forms of lung cancer, but few information exists regarding the role of genetics, particularly on Genome Wide Association Studies (GWAS). The aim of the study is to explore the evidence available obtained through GWAS studies for SCLC using a systematic review. We performed a literature search in the main databases until July 31st, 2023. We included all human based studies on GWAS for lung cancer which presented results for SCLC. Only studies with participants diagnosed of SCLC with anatomopathological confirmation were included. Fourteen studies were identified; 8 studies showed a relationship between ASCL1 overexpression and SCLC, which may regulate CHRNA5/A3/B4 cluster, producing a consequent nAChR overexpression. Nine papers, including 8 of the previous, found a positive association between SNPs located in chromosome 15 and SCLC. The most important cluster of genes found is CHRNA5/A3/B4 but the mechanism for the role of these genes is unclear. Kyoto Encyclopaedia of Genes and Genome (KEGG) shows that these receptors were found to be overexpressed where nicotine, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and N'-Nitrosonornicotine (NNN) acts, involving different routes in SCLC carcinogenesis.
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Affiliation(s)
- José Ramón Enjo-Barreiro
- Department of Preventive Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain; Service of Preventive Medicine, A Coruña University Teaching Hospital Complex, A Coruña, Spain
| | - Alberto Ruano-Ravina
- Department of Preventive Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Santiago de Compostela, Spain; Health Research Institute of Santiago de Compostela (Instituto de Investigación Sanitaria de Santiago de Compostela - IDIS), Santiago de Compostela, Spain.
| | - Mónica Pérez-Ríos
- Department of Preventive Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Santiago de Compostela, Spain; Health Research Institute of Santiago de Compostela (Instituto de Investigación Sanitaria de Santiago de Compostela - IDIS), Santiago de Compostela, Spain
| | - Karl Kelsey
- Department of Epidemiology, Brown School of Public Health, Brown University, Providence, RI
| | - Juan Miguel Barros-Dios
- Department of Preventive Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Santiago de Compostela, Spain; Health Research Institute of Santiago de Compostela (Instituto de Investigación Sanitaria de Santiago de Compostela - IDIS), Santiago de Compostela, Spain
| | - Leonor Varela-Lema
- Department of Preventive Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Santiago de Compostela, Spain; Health Research Institute of Santiago de Compostela (Instituto de Investigación Sanitaria de Santiago de Compostela - IDIS), Santiago de Compostela, Spain
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Huang JP, Li J, Xiao YP, Xu LG. BAG6 negatively regulates the RLR signaling pathway by targeting VISA/MAVS. Front Immunol 2022; 13:972184. [PMID: 36045679 PMCID: PMC9420869 DOI: 10.3389/fimmu.2022.972184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 07/25/2022] [Indexed: 12/03/2022] Open
Abstract
The virus-induced signaling adaptor protein VISA (also known as MAVS, ISP-1, Cardif) is a critical adaptor protein in the innate immune response to RNA virus infection. Upon viral infection, VISA self-aggregates to form a sizeable prion-like complex and recruits downstream signal components for signal transduction. Here, we discover that BAG6 (BCL2-associated athanogene 6, formerly BAT3 or Scythe) is an essential negative regulator in the RIG-I-like receptor signaling pathway. BAG6 inhibits the aggregation of VISA by promoting the K48-linked ubiquitination and specifically attenuates the recruitment of TRAF2 by VISA to inhibit RLR signaling. The aggregation of VISA and the interaction of VISA and TRAF2 are enhanced in BAG6-deficient cell lines after viral infection, resulting in the enhanced transcription level of downstream antiviral genes. Our research shows that BAG6 is a critical regulating factor in RIG-I/VISA-mediated innate immune response by targeting VISA.
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Legaki E, Arsenis C, Taka S, Papadopoulos NG. DNA methylation biomarkers in asthma and rhinitis: Are we there yet? Clin Transl Allergy 2022; 12:e12131. [PMID: 35344303 PMCID: PMC8967268 DOI: 10.1002/clt2.12131] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 02/01/2022] [Accepted: 02/22/2022] [Indexed: 12/16/2022] Open
Abstract
The study of epigenetics has improved our understanding of mechanisms underpinning gene‐environment interactions and is providing new insights in the pathophysiology of respiratory allergic diseases. We reviewed the literature on DNA methylation patterns across different tissues in asthma and/or rhinitis and attempted to elucidate differentially methylated loci that could be used to characterize asthma or rhinitis. Although nasal and bronchial epithelia are similar in their histological structure and cellular composition, genetic and epigenetic regulation may differ across tissues. Advanced methods have enabled comprehensive, high‐throughput methylation profiling of different tissues (bronchial or nasal epithelial cells, whole blood or isolated mononuclear cells), in subjects with respiratory conditions, aiming to elucidate gene regulation mechanisms and identify new biomarkers. Several genes and CpGs have been suggested as asthma biomarkers, though research on allergic rhinitis is still lacking. The most common differentially methylated loci presented in both blood and nasal samples are ACOT7, EPX, KCNH2, SIGLEC8, TNIK, FOXP1, ATPAF2, ZNF862, ADORA3, ARID3A, IL5RA, METRNL and ZFPM1. Overall, there is substantial variation among studies, (i.e. sample sizes, age groups and disease phenotype). Greater variability of analysis method detailed phenotypic characterization and age stratification should be taken into account in future studies.
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Affiliation(s)
- Evangelia Legaki
- Allergy and Clinical Immunology Unit Second Pediatric Clinic National and Kapodistrian University of Athens Athens Greece
| | - Christos Arsenis
- Allergy and Clinical Immunology Unit Second Pediatric Clinic National and Kapodistrian University of Athens Athens Greece
| | - Styliani Taka
- Allergy and Clinical Immunology Unit Second Pediatric Clinic National and Kapodistrian University of Athens Athens Greece
| | - Nikolaos G. Papadopoulos
- Allergy and Clinical Immunology Unit Second Pediatric Clinic National and Kapodistrian University of Athens Athens Greece
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BAG Family Members as Mitophagy Regulators in Mammals. Cells 2022; 11:cells11040681. [PMID: 35203329 PMCID: PMC8870067 DOI: 10.3390/cells11040681] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/27/2022] [Accepted: 02/07/2022] [Indexed: 01/27/2023] Open
Abstract
The BCL-2-associated athanogene (BAG) family is a multifunctional group of co-chaperones that are evolutionarily conserved from yeast to mammals. In addition to their common BAG domain, these proteins contain, in their sequences, many specific domains/motifs required for their various functions in cellular quality control, such as autophagy, apoptosis, and proteasomal degradation of misfolded proteins. The BAG family includes six members (BAG1 to BAG6). Recent studies reported their roles in autophagy and/or mitophagy through interaction with the autophagic machinery (LC3, Beclin 1, P62) or with the PINK1/Parkin signaling pathway. This review describes the mechanisms underlying BAG family member functions in autophagy and mitophagy and the consequences in physiopathology.
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Luo J, Wang L, Song L, Luo ZQ. Exploitation of the Host Ubiquitin System: Means by Legionella pneumophila. Front Microbiol 2022; 12:790442. [PMID: 35003021 PMCID: PMC8727461 DOI: 10.3389/fmicb.2021.790442] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 11/30/2021] [Indexed: 01/12/2023] Open
Abstract
Ubiquitination is a commonly used post-translational modification (PTM) in eukaryotic cells, which regulates a wide variety of cellular processes, such as differentiation, apoptosis, cell cycle, and immunity. Because of its essential role in immunity, the ubiquitin network is a common target of infectious agents, which have evolved various effective strategies to hijack and co-opt ubiquitin signaling for their benefit. The intracellular pathogen Legionella pneumophila represents one such example; it utilizes a large cohort of virulence factors called effectors to modulate diverse cellular processes, resulting in the formation a compartment called the Legionella-containing vacuole (LCV) that supports its replication. Many of these effectors function to re-orchestrate ubiquitin signaling with distinct biochemical activities. In this review, we highlight recent progress in the mechanism of action of L. pneumophila effectors involved in ubiquitination and discuss their roles in bacterial virulence and host cell biology.
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Affiliation(s)
- Jingjing Luo
- Department of Respiratory Medicine, Center for Pathogen Biology and Infectious Diseases, Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun, China
| | - Lidong Wang
- Department of Respiratory Medicine, Center for Pathogen Biology and Infectious Diseases, Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun, China
| | - Lei Song
- Department of Respiratory Medicine, Center for Pathogen Biology and Infectious Diseases, Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun, China
| | - Zhao-Qing Luo
- Department of Biological Sciences, Purdue University, West Lafayette, IN, United States
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Ren YR, Ye YL, Feng Y, Xu TF, Shen Y, Liu J, Huang SL, Shen JH, Leng Y. SL010110, a lead compound, inhibits gluconeogenesis via SIRT2-p300-mediated PEPCK1 degradation and improves glucose homeostasis in diabetic mice. Acta Pharmacol Sin 2021; 42:1834-1846. [PMID: 33574568 PMCID: PMC8563938 DOI: 10.1038/s41401-020-00609-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 12/29/2020] [Indexed: 12/25/2022] Open
Abstract
Suppression of excessive hepatic gluconeogenesis is an effective strategy for controlling hyperglycemia in type 2 diabetes (T2D). In the present study, we screened our compounds library to discover the active molecules inhibiting gluconeogenesis in primary mouse hepatocytes. We found that SL010110 (5-((4-allyl-2-methoxyphenoxy) methyl) furan-2-carboxylic acid) potently inhibited gluconeogenesis with 3 μM and 10 μM leading to a reduction of 45.5% and 67.5%, respectively. Moreover, SL010110 caused suppression of gluconeogenesis resulted from downregulating the protein level of phosphoenolpyruvate carboxykinase 1 (PEPCK1), but not from affecting the gene expressions of PEPCK, glucose-6-phosphatase, and fructose-1,6-bisphosphatase. Furthermore, SL010110 increased PEPCK1 acetylation, and promoted PEPCK1 ubiquitination and degradation. SL010110 activated p300 acetyltransferase activity in primary mouse hepatocytes. The enhanced PEPCK1 acetylation and suppressed gluconeogenesis caused by SL010110 were blocked by C646, a histone acetyltransferase p300 inhibitor, suggested that SL010110 inhibited gluconeogenesis by activating p300. SL010110 decreased NAD+/NADH ratio, inhibited SIRT2 activity, and further promoted p300 acetyltransferase activation and PEPCK1 acetylation. These effects were blocked by NMN, an NAD+ precursor, suggested that SL010110 inhibited gluconeogenesis by inhibiting SIRT2, activating p300, and subsequently promoting PEPCK1 acetylation. In type 2 diabetic ob/ob mice, single oral dose of SL010110 (100 mg/kg) suppressed gluconeogenesis accompanied by the suppressed hepatic SIRT2 activity, increased p300 activity, enhanced PEPCK1 acetylation and degradation. Chronic oral administration of SL010110 (15 or 50 mg/kg) significantly reduced the blood glucose levels in ob/ob and db/db mice. This study reveals that SL010110 is a lead compound with a distinct mechanism of suppressing gluconeogenesis via SIRT2-p300-mediated PEPCK1 degradation and potent anti-hyperglycemic activity for the treatment of T2D.
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Affiliation(s)
- Yu-Ran Ren
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yang-Liang Ye
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Ying Feng
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Ti-Fei Xu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Yu Shen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Jia Liu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Su-Ling Huang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
| | - Jian-Hua Shen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
| | - Ying Leng
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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Koike K, Masuda T, Sato K, Fujii A, Wakiyama H, Tobo T, Takahashi J, Motomura Y, Nakano T, Saito H, Matsumoto Y, Otsu H, Takeishi K, Yonemura Y, Mimori K, Nakagawa T. GET4 is a novel driver gene in colorectal cancer that regulates the localization of BAG6, a nucleocytoplasmic shuttling protein. Cancer Sci 2021; 113:156-169. [PMID: 34704338 PMCID: PMC8748226 DOI: 10.1111/cas.15174] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/11/2021] [Accepted: 10/18/2021] [Indexed: 11/28/2022] Open
Abstract
Colorectal cancer (CRC) is one of the most common types of cancer and a significant cause of cancer mortality worldwide. Further improvements of CRC therapeutic approaches are needed. BCL2‐associated athanogene 6 (BAG6), a multifunctional scaffold protein, plays an important role in tumor progression. However, regulation of BAG6 in malignancies remains unclear. This study showed that guided entry of tail‐anchored proteins factor 4 (GET4), a component of the BAG6 complex, regulates the intercellular localization of BAG6 in CRC. Furthermore, GET4 was identified as a candidate driver gene on the short arm of chromosome 7, which is often amplified in CRC, by our bioinformatics approach using the CRC dataset from The Cancer Genome Atlas. Clinicopathologic and prognostic analyses using CRC datasets showed that GET4 was overexpressed in tumor cells due to an increased DNA copy number. High GET4 expression was an independent poor prognostic factor in CRC, whereas BAG6 was mainly overexpressed in the cytoplasm of tumor cells without gene alteration. The biological significance of GET4 was examined using GET4 KO CRC cells generated with CRISPR‐Cas9 technology or transfected CRC cells. In vitro and in vivo analyses showed that GET4 promoted tumor growth. It appears to facilitate cell cycle progression by cytoplasmic enrichment of BAG6‐mediated p53 acetylation followed by reduced p21 expression. In conclusion, we showed that GET4 is a novel driver gene and a prognostic biomarker that promotes CRC progression by inducing the cytoplasmic transport of BAG6. GET4 could be a promising therapeutic molecular target in CRC.
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Affiliation(s)
- Kensuke Koike
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan.,Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takaaki Masuda
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Kuniaki Sato
- Department of Head and Neck Surgery, National Hospital Organization Kyushu Cancer Center, Fukuoka, Japan
| | - Atsushi Fujii
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Hiroaki Wakiyama
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Taro Tobo
- Department of Pathology, Kyushu University Beppu Hospital, Beppu, Japan
| | - Junichi Takahashi
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Yushi Motomura
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Takafumi Nakano
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Hideyuki Saito
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | | | - Hajime Otsu
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Kazuki Takeishi
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Yusuke Yonemura
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Koshi Mimori
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - Takashi Nakagawa
- Department of Head and Neck Surgery, National Hospital Organization Kyushu Cancer Center, Fukuoka, Japan
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10
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Xiong K, la Cour Karottki KJ, Hefzi H, Li S, Grav LM, Li S, Spahn P, Lee JS, Ventina I, Lee GM, Lewis NE, Kildegaard HF, Pedersen LE. An optimized genome-wide, virus-free CRISPR screen for mammalian cells. CELL REPORTS METHODS 2021; 1:100062. [PMID: 34935002 PMCID: PMC8687118 DOI: 10.1016/j.crmeth.2021.100062] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/17/2021] [Accepted: 07/09/2021] [Indexed: 12/19/2022]
Abstract
Pooled CRISPR screens have been widely applied to mammalian and other organisms to elucidate the interplay between genes and phenotypes of interest. The most popular method for delivering the CRISPR components into mammalian cells is lentivirus based. However, because lentivirus is not always an option, virus-free protocols are starting to emerge. Here, we demonstrate an improved virus-free, genome-wide CRISPR screening platform for Chinese hamster ovary cells with 75,488 gRNAs targeting 15,028 genes. Each gRNA expression cassette in the library is precisely integrated into a genomic landing pad, resulting in a very high percentage of single gRNA insertions and minimal clonal variation. Using this platform, we perform a negative selection screen on cell proliferation that identifies 1,980 genes that affect proliferation and a positive selection screen on the toxic endoplasmic reticulum stress inducer, tunicamycin, that identifies 77 gene knockouts that improve survivability.
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Affiliation(s)
- Kai Xiong
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark
| | | | - Hooman Hefzi
- The Novo Nordisk Foundation Center for Biosustainability, University of California at San Diego, La Jolla, CA, USA
- Department of Pediatrics, University of California at San Diego, La Jolla, CA, USA
| | - Songyuan Li
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark
| | - Lise Marie Grav
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark
| | - Shangzhong Li
- The Novo Nordisk Foundation Center for Biosustainability, University of California at San Diego, La Jolla, CA, USA
- Department of Bioengineering, University of California at San Diego, La Jolla, CA, USA
| | - Philipp Spahn
- The Novo Nordisk Foundation Center for Biosustainability, University of California at San Diego, La Jolla, CA, USA
- Department of Pediatrics, University of California at San Diego, La Jolla, CA, USA
| | - Jae Seong Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea
| | - Ildze Ventina
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark
| | - Gyun Min Lee
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark
- Department of Biological Sciences, KAIST, Daejeon, Republic of Korea
| | - Nathan E. Lewis
- The Novo Nordisk Foundation Center for Biosustainability, University of California at San Diego, La Jolla, CA, USA
- Department of Pediatrics, University of California at San Diego, La Jolla, CA, USA
- Department of Bioengineering, University of California at San Diego, La Jolla, CA, USA
| | - Helene Faustrup Kildegaard
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark
| | - Lasse Ebdrup Pedersen
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark
- Department of Bioengineering, Technical University of Denmark, Lyngby, Denmark
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11
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Marzullo L, Turco MC, Uversky VN. What's in the BAGs? Intrinsic disorder angle of the multifunctionality of the members of a family of chaperone regulators. J Cell Biochem 2021; 123:22-42. [PMID: 34339540 DOI: 10.1002/jcb.30123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/28/2021] [Accepted: 07/22/2021] [Indexed: 01/22/2023]
Abstract
In humans, the family of Bcl-2 associated athanogene (BAG) proteins includes six members characterized by exceptional multifunctionality and engagement in the pathogenesis of various diseases. All of them are capable of interacting with a multitude of often unrelated binding partners. Such binding promiscuity and related functional and pathological multifacetedness cannot be explained or understood within the frames of the classical "one protein-one structure-one function" model, which also fails to explain the presence of multiple isoforms generated for BAG proteins by alternative splicing or alternative translation initiation and their extensive posttranslational modifications. However, all these mysteries can be solved by taking into account the intrinsic disorder phenomenon. In fact, high binding promiscuity and potential to participate in a broad spectrum of interactions with multiple binding partners, as well as a capability to be multifunctional and multipathogenic, are some of the characteristic features of intrinsically disordered proteins and intrinsically disordered protein regions. Such functional proteins or protein regions lacking unique tertiary structures constitute a cornerstone of the protein structure-function continuum concept. The aim of this paper is to provide an overview of the functional roles of human BAG proteins from the perspective of protein intrinsic disorder which will provide a means for understanding their binding promiscuity, multifunctionality, and relation to the pathogenesis of various diseases.
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Affiliation(s)
- Liberato Marzullo
- Department of Medicine, Surgery and Dentistry Schola Medica Salernitana, University of Salerno, Baronissi, Italy.,Research and Development Division, BIOUNIVERSA s.r.l., Baronissi, Italy
| | - Maria C Turco
- Department of Medicine, Surgery and Dentistry Schola Medica Salernitana, University of Salerno, Baronissi, Italy.,Research and Development Division, BIOUNIVERSA s.r.l., Baronissi, Italy
| | - Vladimir N Uversky
- Department of Molecular Medicine and Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
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12
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Zhu C, Dixon KO, Newcomer K, Gu G, Xiao S, Zaghouani S, Schramm MA, Wang C, Zhang H, Goto K, Christian E, Rangachari M, Rosenblatt-Rosen O, Okada H, Mak T, Singer M, Regev A, Kuchroo V. Tim-3 adaptor protein Bat3 is a molecular checkpoint of T cell terminal differentiation and exhaustion. SCIENCE ADVANCES 2021; 7:eabd2710. [PMID: 33931442 PMCID: PMC8087420 DOI: 10.1126/sciadv.abd2710] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 03/10/2021] [Indexed: 05/03/2023]
Abstract
T cell exhaustion has been associated with poor prognosis in persistent viral infection and cancer. Conversely, in the context of autoimmunity, T cell exhaustion has been favorably correlated with long-term clinical outcome. Understanding the development of exhaustion in autoimmune settings may provide underlying principles that can be exploited to quell autoreactive T cells. Here, we demonstrate that the adaptor molecule Bat3 acts as a molecular checkpoint of T cell exhaustion, with deficiency of Bat3 promoting a profound exhaustion phenotype, suppressing autoreactive T cell-mediated neuroinflammation. Mechanistically, Bat3 acts as a critical mTORC2 inhibitor to suppress Akt function. As a result, Bat3 deficiency leads to increased Akt activity and FoxO1 phosphorylation, indirectly promoting Prdm1 expression. Transcriptional analysis of Bat3 -/- T cells revealed up-regulation of dysfunction-associated genes, concomitant with down-regulation of genes associated with T cell effector function, suggesting that absence of Bat3 can trigger T cell dysfunction even under highly proinflammatory autoimmune conditions.
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Affiliation(s)
- Chen Zhu
- Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Karen O Dixon
- Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Kathleen Newcomer
- Department of Immunology, Harvard Medical School, Boston, MA 02115, USA
- Department of Data Sciences, DFCI, Boston, MA 02215, USA
| | - Guangxiang Gu
- Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Sheng Xiao
- Celsius Therapeutics, Cambridge, MA 02139, USA
| | - Sarah Zaghouani
- Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Markus A Schramm
- Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Chao Wang
- Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Huiyuan Zhang
- Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Kouichiro Goto
- The Campbell Family Institute for Breast Cancer Research, Ontario Cancer Institute, University of Health Network, Toronto, Ontario M5G 2M9, Canada
| | | | - Manu Rangachari
- Axe Neurosciences, Centre de recherche du CHU de Québec-Université Laval, QC, Québec, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, Québec, QC, Canada
| | | | - Hitoshi Okada
- Department of Biochemistry, Kindai University Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka 589-8511, Japan
| | - Tak Mak
- The Campbell Family Institute for Breast Cancer Research, Ontario Cancer Institute, University of Health Network, Toronto, Ontario M5G 2M9, Canada
| | - Meromit Singer
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
- Department of Immunology, Harvard Medical School, Boston, MA 02115, USA
- Department of Data Sciences, DFCI, Boston, MA 02215, USA
| | - Aviv Regev
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Department of Biology, Koch Institute and Ludwig Center, Massachusetts Institute of Technology, Cambridge, MA 02142, USA
- Howard Hughes Medical Institute, Chevy Chase, MD, USA
| | - Vijay Kuchroo
- Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
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13
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Zhang R, Cui D, Xue T, Lang Y, Zhang Y, Li L, Sun H, Kuang Y, Li G, Tang J. HLA-B-associated transcript 3 (Bat3) stabilizes and activates p53 in a HAUSP-dependent manner. J Mol Cell Biol 2021; 12:99-112. [PMID: 31647545 PMCID: PMC7109604 DOI: 10.1093/jmcb/mjz102] [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: 03/28/2019] [Revised: 07/12/2019] [Accepted: 08/26/2019] [Indexed: 01/06/2023] Open
Abstract
The p53 pathway is a highly complex signaling network including several key regulators. HAUSP is a critical component of the p53 pathway acting as a deubiquitinase for both p53 and its key repressor Mdm2. Here, we identified a novel HAUSP-interacting protein, HLA-B-associated transcript 3 (Bat3) and found it to be capable of inducing p53 stabilization and activation via a HAUSP-dependent mechanism, resulting in cell growth inhibition. Surprisingly, the deubiquitylating enzymatic activity of HAUSP was not required for this phenomenon. Co-immunoprecipitation showed that p53 coexisted in a complex with Bat3 and HAUSP in vivo, and HAUSP may serve as a binding mediator to enhance the interaction between p53 and Bat3. Further studies revealed that formation of this three-protein complex interfered with the binding of p53 to its proteasome receptor S5a and promoted the accumulation of p53 in nucleus. Notably, Mdm2 protein abundance is also regulated by Bat3 in the presence of HAUSP. Overexpression of Bat3 and HAUSP increases Mdm2 protein levels without influencing the p53–Mdm2 interaction and Mdm2-mediated p53 ubiquitination, indicating that Bat3–HAUSP-mediated protein stabilization is not specific to p53 and different mechanisms may be involved in Bat3-mediated regulation of p53–Mdm2 pathway. Together, our study unravels a novel mechanism by which p53 is stabilized and activated by HAUSP-mediated interaction with Bat3 and implies that Bat3 might function as a tumor suppressor through the stabilization of p53.
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Affiliation(s)
- Rui Zhang
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, China
| | - Di Cui
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, China.,Clinical Research Institute, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Teng Xue
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, China
| | - Yue Lang
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, China
| | - Yunfan Zhang
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, China
| | - Lianjie Li
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, China
| | - Haili Sun
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, China
| | - Yu Kuang
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Gebin Li
- Department of Clinical Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Jun Tang
- Department of Basic Veterinary, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, China
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14
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Pavlakis E, Neumann M, Stiewe T. Extracellular Vesicles: Messengers of p53 in Tumor-Stroma Communication and Cancer Metastasis. Int J Mol Sci 2020; 21:ijms21249648. [PMID: 33348923 PMCID: PMC7766631 DOI: 10.3390/ijms21249648] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 12/12/2022] Open
Abstract
Tumor progression to a metastatic and ultimately lethal stage relies on a tumor-supporting microenvironment that is generated by reciprocal communication between tumor and stromal host cells. The tumor–stroma crosstalk is instructed by the genetic alterations of the tumor cells—the most frequent being mutations in the gene Tumor protein p53 (TP53) that are clinically correlated with metastasis, drug resistance and poor patient survival. The crucial mediators of tumor–stroma communication are tumor-derived extracellular vesicles (EVs), in particular exosomes, which operate both locally within the primary tumor and in distant organs, at pre-metastatic niches as the future sites of metastasis. Here, we review how wild-type and mutant p53 proteins control the secretion, size, and especially the RNA and protein cargo of tumor-derived EVs. We highlight how EVs extend the cell-autonomous tumor suppressive activity of wild-type p53 into the tumor microenvironment (TME), and how mutant p53 proteins switch EVs into oncogenic messengers that reprogram tumor–host communication within the entire organism so as to promote metastatic tumor cell dissemination.
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Affiliation(s)
- Evangelos Pavlakis
- Institute of Molecular Oncology, Philipps University, 35034 Marburg, Germany; (E.P.); (M.N.)
| | - Michelle Neumann
- Institute of Molecular Oncology, Philipps University, 35034 Marburg, Germany; (E.P.); (M.N.)
| | - Thorsten Stiewe
- Institute of Molecular Oncology, Philipps University, 35034 Marburg, Germany; (E.P.); (M.N.)
- Universities of Giessen and Marburg Lung Center (UGMLC), German Center of Lung Research (DZL), Philipps University, 35034 Marburg, Germany
- Correspondence:
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15
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The Chaperone BAG6 Regulates Cellular Homeostasis between Autophagy and Apoptosis by Holding LC3B. iScience 2020; 23:101708. [PMID: 33241194 PMCID: PMC7674511 DOI: 10.1016/j.isci.2020.101708] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 07/27/2020] [Accepted: 10/16/2020] [Indexed: 12/15/2022] Open
Abstract
AMFR/gp78 and USP13 are a pair of ubiquitin ligase and deubiquitinase that ensure the accuracy of endoplasmic reticulum-associated degradation (ERAD). Depletion of USP13 leads to caspase activation and cleavage of the ERAD chaperone BAG6, which is reversed by knockdown of AMFR. However, the mechanism and physiological relevance of this regulation are still unclear. Here, by using the NEDDylator system, we screened out TXN as a substrate of AMFR and USP13 and showed its involvement in regulating CASP3 activation and BAG6 cleavage. Furthermore, we showed that the cleaved N-terminal BAG6 is located in the cytosol and interacts with both LC3B-I and unprocessed form of LC3B (Pro-LC3B) through the LIR1 motif to suppress autophagy. An NMR approach verified the direct interaction between BAG6 LIR1 and LC3B-I or Pro-LC3B. Collectively, our findings uncover a mechanism that converts BAG6 from an ERAD regulator to an autophagy tuner and apoptosis inducer during ER stress.
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16
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Xu J, Liu F, Xiong Z, Huo J, Li W, Jiang B, Mao W, He B, Wang X, Li G. The cleft palate candidate gene BAG6 supports FoxO1 acetylation to promote FasL-mediated apoptosis during palate fusion. Exp Cell Res 2020; 396:112310. [PMID: 32991875 DOI: 10.1016/j.yexcr.2020.112310] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 09/25/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Cleft palate is a common craniofacial defect, which occurs when the palate fails to fuse during development. During fusion, the palatal shelves migrate towards the embryonic midline to form a seam. Apoptotic elimination of medial edge epithelium (MEE) cells along this seam is required for the completion of palate fusion. METHODS Whole exome sequencing (WES) of six Chinese cleft palate families was applied to identify novel cleft palate-associated gene variants. Palatal fusion and immunofluorescence studies were performed in a murine palatal shelf organ culture model. Gene and protein expression were analyzed by qPCR and immunoblotting in murine MEE cells during seam formation in vivo. Mechanistic immunoprecipitation studies were performed in murine MEE cells in vitro. RESULTS WES identified Bcl-2 associated anthanogene 6 (BAG6) as a novel cleft palate-associated gene. In murine MEE cells, we discovered upregulation of Bag6 and the transcription factor forkhead box protein O1 (FoxO1) during seam formation in vivo. Using a palatal shelf organ culture model, we demonstrate that nuclear-localized Bag6 enhances MEE cell apoptosis by promoting p300's acetylation of FoxO1, thereby promoting transcription of the pro-apoptotic Fas ligand (FasL). Subsequent gain- and loss-of-function studies in the organ culture model demonstrated that FasL is required for Bag6/acFoxO1-mediated activation of pro-apoptotic Bax/caspase-3 signaling, MEE apoptosis, and palate fusion. Palatal shelf contact was shown to enhance Bag6 nuclear localization and upregulate nuclear acFoxO1 in MEE cells. CONCLUSIONS These findings demonstrate that nuclear-localized Bag6 and p300 co-operatively enhance FoxO1 acetylation to promote FasL-mediated MEE apoptosis during palate fusion.
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Affiliation(s)
- Jing Xu
- Department of Plastic and Reconstructive Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Fei Liu
- Anhui Clinical and Preclinical Key Laboratory of Respiratory Disease, Bengbu, China; The Molecular diagnostic center, The Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Zhuyou Xiong
- Department of Plastic and Reconstructive Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Jiwu Huo
- Department of Plastic and Reconstructive Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Wei Li
- Department of Plastic and Reconstructive Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Banghong Jiang
- Department of Plastic and Reconstructive Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Wu Mao
- Department of Plastic and Reconstructive Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Bo He
- Department of Plastic and Reconstructive Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Xiaojing Wang
- Anhui Clinical and Preclinical Key Laboratory of Respiratory Disease, Bengbu, China; The Molecular diagnostic center, The Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu, China.
| | - Guangzao Li
- Department of Plastic and Reconstructive Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu, China.
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17
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Shete S, Liu H, Wang J, Yu R, Sturgis EM, Li G, Dahlstrom KR, Liu Z, Amos CI, Wei Q. A Genome-Wide Association Study Identifies Two Novel Susceptible Regions for Squamous Cell Carcinoma of the Head and Neck. Cancer Res 2020; 80:2451-2460. [PMID: 32276964 PMCID: PMC7299763 DOI: 10.1158/0008-5472.can-19-2360] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 02/06/2020] [Accepted: 04/07/2020] [Indexed: 12/13/2022]
Abstract
To identify genetic variants for risk of squamous cell carcinoma of the head and neck (SCCHN), we conducted a two-phase genome-wide association study consisting of 7,858,089 SNPs in 2,171 cases and 4,493 controls of non-Hispanic white, of which, 434,839 typed and 7,423,250 imputed SNPs were used as the discovery. SNPs with P < 1 × 10-3 were further validated in the OncoArray study of oral and pharynx cancer (5,205 cases and 3,232 controls of European ancestry) from databases of Genotypes and Phenotypes. Meta-analysis of the discovery and replication studies identified one novel locus 6p22.1 (P = 2.96 × 10-9 for the leading rs259919) and two cancer susceptibility loci 6p21.32 (rs3135001, HLA-DQB1) and 6p21.33 (rs1265081, CCHCR1) associated with SCCHN risk. Further stratification by tumor site revealed four known cancer loci (5p15.33, 6p21.32, 6p21.33, and 2p23.1) associated with oral cavity cancer risk and oropharyngeal cancer risk, respectively. In addition, one novel locus 18q22.2 (P = 2.54 × 10-9 for the leading SNP rs142021700) was identified for hypopharynx and larynx cancer risk. For SNPs in those reported or novel loci, we also performed functional annotations by bioinformatics prediction and expression quantitative trait loci analysis. Collectively, our identification of four reported loci (2p23.1, 5p15.33, 6p21.32, and 6p21.33) and two novel loci (6p22.1 and 18q22.2) for SCCHN risk highlight the importance of human leukocyte antigen loci for oropharyngeal cancer risk, suggesting that immunologic mechanisms are implicated in the etiology of this subset of SCCHN. SIGNIFICANCE: Two novel risk loci for SCCHN in non-Hispanic white individuals highlight the importance of immunologic mechanism in the disease etiology.
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Affiliation(s)
- Sanjay Shete
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Hongliang Liu
- Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina
| | - Jian Wang
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Robert Yu
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Erich M Sturgis
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Guojun Li
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Kristina R Dahlstrom
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Zhensheng Liu
- Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina
| | - Christopher I Amos
- The Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
| | - Qingyi Wei
- Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina.
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina
- Department of Population Health Sciences, Duke University Medical School, Durham, North Carolina
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18
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Mariotto E, Viola G, Zanon C, Aveic S. A BAG's life: Every connection matters in cancer. Pharmacol Ther 2020; 209:107498. [PMID: 32001313 DOI: 10.1016/j.pharmthera.2020.107498] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 01/17/2020] [Indexed: 12/30/2022]
Abstract
The members of the BCL-2 associated athanogene (BAG) family participate in the regulation of a variety of interrelated physiological processes, such as autophagy, apoptosis, and protein homeostasis. Under normal circumstances, the six BAG members described in mammals (BAG1-6) principally assist the 70 kDa heat-shock protein (HSP70) in protein folding; however, their role as oncogenes is becoming increasingly evident. Deregulation of the BAG multigene family has been associated with cell transformation, tumor recurrence, and drug resistance. In addition to BAG overexpression, BAG members are also involved in many oncogenic protein-protein interactions (PPIs). As such, either the inhibition of overloading BAGs or of specific BAG-client protein interactions could have paramount therapeutic value. In this review, we will examine the role of each BAG family member in different malignancies, focusing on their modular structure, which enables interaction with a variety of proteins to exert their pro-tumorigenic role. Lastly, critical remarks on the unmet needs for proposing effective BAG inhibitors will be pointed out.
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Affiliation(s)
- Elena Mariotto
- Department of Woman's and Child's Health, University of Padova, Via Giustiniani 2, 35127 Padova, Italy; Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35128 Padova, Italy.
| | - Giampietro Viola
- Department of Woman's and Child's Health, University of Padova, Via Giustiniani 2, 35127 Padova, Italy; Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35128 Padova, Italy
| | - Carlo Zanon
- Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35128 Padova, Italy
| | - Sanja Aveic
- Neuroblastoma Laboratory, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35128 Padova, Italy
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19
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Biola-Clier M, Gaillard JC, Rabilloud T, Armengaud J, Carriere M. Titanium Dioxide Nanoparticles Alter the Cellular Phosphoproteome in A549 Cells. NANOMATERIALS 2020; 10:nano10020185. [PMID: 31973118 PMCID: PMC7074930 DOI: 10.3390/nano10020185] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/11/2020] [Accepted: 01/16/2020] [Indexed: 12/02/2022]
Abstract
TiO2 nanoparticles (NPs) are one of the most produced NPs worldwide and are used in many consumer products. Their impact on human health, especially through inhalation, has been studied for more than two decades. TiO2 is known for its strong affinity towards phosphates, and consequently interaction with cellular phosphates may be one of the mechanisms driving its toxicity. In the present study, we used a phosphoproteomics approach to document the interaction of TiO2-NP with phosphoproteins from A549 human pulmonary alveolar epithelial cells. Cells were exposed to 21 nm anatase/rutile TiO2-NPs, then their phosphopeptides were extracted and analyzed using shotgun proteomics. By comparing the phosphoprotein content, phosphorylation status and phosphorylation sites of exposed cells with that of control cells, our results show that by affecting the phosphoproteome, TiO2-NPs affect cellular processes such as apoptosis, linked with cell cycle and the DNA damage response, TP53 being central to these pathways. Other pathways including inflammation and molecular transport are also affected. These molecular mechanisms of TiO2-NP toxicity have been reported previously, our study shows for the first time that they may derive from phosphoproteome modulation, which could be one of their upstream regulators.
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Affiliation(s)
| | - Jean-Charles Gaillard
- Laboratoire Innovations technologiques pour la Détection et le Diagnostic (Li2D), Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, F-30207 Bagnols-sur-Cèze, France;
| | - Thierry Rabilloud
- Chemistry and Biology of Metals, Univ. Grenoble Alpes, CNRS UMR5249, CEA, IRIG-DIESE-LCBM-ProMD, F-38054 Grenoble, France;
| | - Jean Armengaud
- Laboratoire Innovations technologiques pour la Détection et le Diagnostic (Li2D), Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, F-30207 Bagnols-sur-Cèze, France;
- Correspondence: (J.A.); (M.C.)
| | - Marie Carriere
- Univ. Grenoble-Alpes, IRIG, SyMMES, CIBEST, F-38000 Grenoble, France;
- Correspondence: (J.A.); (M.C.)
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Liu L, Song X, Li X, Xue L, Ding S, Niu L, Xie L, Song X. A three-platelet mRNA set: MAX, MTURN and HLA-B as biomarker for lung cancer. J Cancer Res Clin Oncol 2019; 145:2713-2723. [PMID: 31552488 DOI: 10.1007/s00432-019-03032-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 09/18/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND During the development of tumors, tumors "educate" platelets causing changes in their mRNAs expression profiles and phenotypes, thereby, tumor-educated platelet (TEP) mRNA profile has the potential to diagnose lung cancer. The current study aimed to examine whether TEPs might be a potential biomarker for lung cancer diagnostics. METHODS Platelet precipitation was obtained by low-speed centrifugation and subjected to Trizol for total RNA extraction. Platelet MAX, MTURN, and HLA-B mRNA were selected by microarray, validated by qPCR, and analyzed combined with related clinical factors. RESULTS Our results showed that a three-platelet mRNA set: MAX, MTURN, and HLA-B was significantly up-regulated in lung cancer patients as well as in early-stage lung cancer patients compared with those from healthy donors, the area under the curve (AUC) was 0.734, 0.787, respectively, among which platelet MTURN mRNA processed a dramatically high diagnostic efficiency in female patients with lung cancer, its AUC for female was 0.825. More importantly, the three-platelet mRNA set: MAX, MTURN, and HLA-B was associated with chemotherapeutic effect, low mRNA expression of this three-platelet set was correlated with "favorable" first chemotherapy response. CONCLUSIONS A three-platelet mRNA set: MAX, MTURN and HLA-B enables blood-based lung cancer diagnosis and chemotherapy response prediction.
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Affiliation(s)
- Lele Liu
- School of Medicine and Life Sciences, University of Jinan, Shandong Academy of Medical Sciences, Jinan, China
- Department of Clinical Laboratory, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Xingguo Song
- Shandong Provincial Key Laboratory of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Xinyi Li
- School of Medicine and Life Sciences, University of Jinan, Shandong Academy of Medical Sciences, Jinan, China
- Department of Clinical Laboratory, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Linlin Xue
- Department of Clinical Laboratory, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Shanshan Ding
- Department of Clinical Laboratory, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
- Department of Clinical Laboratory, Shandong Cancer Hospital Affiliated to Shandong University, Jinan, China
| | - Limin Niu
- School of Medicine and Life Sciences, University of Jinan, Shandong Academy of Medical Sciences, Jinan, China
- Department of Clinical Laboratory, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Li Xie
- Department of Clinical Laboratory, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Xianrang Song
- Department of Clinical Laboratory, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China.
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Schuldner M, Dörsam B, Shatnyeva O, Reiners KS, Kubarenko A, Hansen HP, Finkernagel F, Roth K, Theurich S, Nist A, Stiewe T, Paschen A, Knittel G, Reinhardt HC, Müller R, Hallek M, von Strandmann EP. Exosome-dependent immune surveillance at the metastatic niche requires BAG6 and CBP/p300-dependent acetylation of p53. Theranostics 2019; 9:6047-6062. [PMID: 31534536 PMCID: PMC6735508 DOI: 10.7150/thno.36378] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/15/2019] [Indexed: 01/08/2023] Open
Abstract
Extracellular vesicles released by tumor cells contribute to the reprogramming of the tumor microenvironment and interfere with hallmarks of cancer including metastasis. Notably, melanoma cell-derived EVs are able to establish a pre-metastatic niche in distant organs, or on the contrary, exert anti-tumor activity. However, molecular insights into how vesicles are selectively packaged with cargo defining their specific functions remain elusive. Methods: Here, we investigated the role of the chaperone Bcl2-associated anthogene 6 (BAG6, synonym Bat3) for the formation of pro- and anti-tumor EVs. EVs collected from wildtype cells and BAG6-deficient cells were characterized by mass spectrometry and RNAseq. Their tumorigenic potential was analyzed using the B-16V transplantation mouse melanoma model. Results: We demonstrate that EVs from B-16V cells inhibit lung metastasis associated with the mobilization of Ly6Clow patrolling monocytes. The formation of these anti-tumor-EVs was dependent on acetylation of p53 by the BAG6/CBP/p300-acetylase complex, followed by recruitment of components of the endosomal sorting complexes required for transport (ESCRT) via a P(S/T)AP double motif of BAG6. Genetic ablation of BAG6 and disruption of this pathway led to the release of a distinct EV subtype, which failed to suppress metastasis but recruited tumor-promoting neutrophils to the pre-metastatic niche. Conclusion: We conclude that the BAG6/CBP/p300-p53 axis is a key pathway directing EV cargo loading and thus a potential novel microenvironmental therapeutic target.
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Pech M, Weckmann M, König IR, Franke A, Heinsen FA, Oliver B, Ricklefs I, Fuchs O, Rabe K, Hansen G, v. Mutius E, Kopp MV. Rhinovirus infections change DNA methylation and mRNA expression in children with asthma. PLoS One 2018; 13:e0205275. [PMID: 30485264 PMCID: PMC6261460 DOI: 10.1371/journal.pone.0205275] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 09/21/2018] [Indexed: 11/29/2022] Open
Abstract
Human rhinovirus infection (HRVI) plays an important role in asthma exacerbations and is thought to be involved in asthma development during early childhood. We hypothesized that HRVI causes differential DNA methylation and subsequently differential mRNA expression in epithelial cells of children with asthma. Primary nasal epithelial cells from children with (n = 10) and without (n = 10) asthma were cultivated up to passage two and infected with Rhinovirus-16 (RV-16). HRVI-induced genome-wide differences of DNA methylation in asthmatics (vs. controls) and resulting mRNA expression were analyzed by the HumanMethylation450 BeadChip Kit (Illumina) and RNA sequencing. These results were further verified by pyrosequencing and quantitative PCR, respectively. 471 CpGs belonging to 268 genes were identified to have HRVI-induced asthma-specifically modified DNA methylation and mRNA expression. A minimum-change criteria was applied to restrict assessment of genes with changes in DNA methylation and mRNA expression of at least 3% and least 0.1 reads/kb per million mapped reads, respectively. Using this approach we identified 16 CpGs, including HLA-B-associated transcript 3 (BAT3) and Neuraminidase 1 (NEU1), involved in host immune response against HRVI. HRVI in nasal epithelial cells leads to specific modifications of DNA methylation with altered mRNA expression in children with asthma. The HRVI-induced alterations in DNA methylation occurred in genes involved in the host immune response against viral infections and asthma pathogenesis. The findings of our pilot study may partially explain how HRVI contribute to the persistence and progression of asthma, and aid to identify possible new therapeutic targets. The promising findings of this pilot study would benefit from replication in a larger cohort.
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Affiliation(s)
- Martin Pech
- University Medical Center Schleswig-Holstein, Department of Pediatric Pneumology & Allergology, Campus Lübeck, Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Lübeck, Germany
| | - Markus Weckmann
- University Medical Center Schleswig-Holstein, Department of Pediatric Pneumology & Allergology, Campus Lübeck, Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Lübeck, Germany
| | - Inke R. König
- University of Lübeck, Institute for Medical Biometry and Statistics, Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Lübeck, Germany
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Femke-Anouska Heinsen
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Brian Oliver
- University of Technology Sydney, and Woolcock Institute of Medical Research, University of Sydney, Sydney, Australia
| | - Isabell Ricklefs
- University Medical Center Schleswig-Holstein, Department of Pediatric Pneumology & Allergology, Campus Lübeck, Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Lübeck, Germany
| | - Oliver Fuchs
- University Medical Center Schleswig-Holstein, Department of Pediatric Pneumology & Allergology, Campus Lübeck, Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Lübeck, Germany
- Department of Pediatric Respiratory Medicine, Inselspital, University Children's Hospital of Bern, University of Bern, Bern, Switzerland
| | - Klaus Rabe
- LungenClinic Grosshansdorf, Department of Pneumology, Großhansdorf, Germany, Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Grosshansdorf, Germany
| | - Gesine Hansen
- Hannover Medical School, Department of Paediatric Pneumology, Allergology and Neonatology, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center of Lung Research (DZL), Hannover, Germany
| | - Erika v. Mutius
- Ludwig-Maximilians-University Munich, Dr. von Hauner Children's Hospital, Comprehensive Pneumology Center München (CPC-M), Member of the German Center of Lung Research (DZL), Munich, Germany
| | - Matthias V. Kopp
- University Medical Center Schleswig-Holstein, Department of Pediatric Pneumology & Allergology, Campus Lübeck, Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Lübeck, Germany
- * E-mail:
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Ji J, Yin Y, Ju H, Xu X, Liu W, Fu Q, Hu J, Zhang X, Sun B. Long non-coding RNA Lnc-Tim3 exacerbates CD8 T cell exhaustion via binding to Tim-3 and inducing nuclear translocation of Bat3 in HCC. Cell Death Dis 2018; 9:478. [PMID: 29706626 PMCID: PMC5924754 DOI: 10.1038/s41419-018-0528-7] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/09/2018] [Accepted: 03/15/2018] [Indexed: 02/08/2023]
Abstract
Although one of the first comprehensive examinations of long non-coding RNA (lncRNA) expression was performed in human CD8 T lymphocytes, little is known about their roles in CD8 T cells functions during the progression of hepatocellular carcinoma (HCC). Here, we show that Lnc-Tim3 is upregulated and negatively correlates with IFN-γ and IL-2 production in tumor-infiltrating CD8 T cells of HCC patients. Lnc-Tim3 plays a pivotal role in stimulating CD8 T exhaustion and the survival of the exhausted CD8 T cells. Mechanistically, Lnc-Tim3 specifically binds to Tim-3 and blocks its interaction with Bat3, thus suppressing downstream Lck/ NFAT1/AP-1 signaling, leading to nuclear localization of Bat3, and enhancing p300-dependent p53 and RelA transcriptional activation of anti-apoptosis genes including MDM2 and Bcl-2. In summary, Lnc-Tim3 promotes T cell exhaustion, a phenotype which is correlated with compromised anti-tumor immunity, suggesting that Lnc-Tim3 and its associated signaling pathways may influence the outcome of cancer therapies aimed at modulating the acquired immune system.
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Affiliation(s)
- Jie Ji
- Liver Transplantation Center of the First Affiliated Hospital and State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Yin Yin
- Liver Transplantation Center of the First Affiliated Hospital and State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Huanyu Ju
- Department of Laboratory Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Xiaoliang Xu
- Liver Transplantation Center of the First Affiliated Hospital and State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Wei Liu
- Department of Gastroenterology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Qiang Fu
- Department of Gastroenterology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Jiaojiao Hu
- Department of Gastroenterology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Xudong Zhang
- Department of General Surgery, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Beicheng Sun
- Liver Transplantation Center of the First Affiliated Hospital and State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China.
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24
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Bossé Y, Amos CI. A Decade of GWAS Results in Lung Cancer. Cancer Epidemiol Biomarkers Prev 2018; 27:363-379. [PMID: 28615365 PMCID: PMC6464125 DOI: 10.1158/1055-9965.epi-16-0794] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 12/06/2016] [Accepted: 04/20/2017] [Indexed: 01/03/2023] Open
Abstract
Genome-wide association studies (GWAS) were successful to identify genetic factors robustly associated with lung cancer. This review aims to synthesize the literature in this field and accelerate the translation of GWAS discoveries into results that are closer to clinical applications. A chronologic presentation of published GWAS on lung cancer susceptibility, survival, and response to treatment is presented. The most important results are tabulated to provide a concise overview in one read. GWAS have reported 45 lung cancer susceptibility loci with varying strength of evidence and highlighted suspected causal genes at each locus. Some genetic risk loci have been refined to more homogeneous subgroups of lung cancer patients in terms of histologic subtypes, smoking status, gender, and ethnicity. Overall, these discoveries are an important step for future development of new therapeutic targets and biomarkers to personalize and improve the quality of care for patients. GWAS results are on the edge of offering new tools for targeted screening in high-risk individuals, but more research is needed if GWAS are to pay off the investment. Complementary genomic datasets and functional studies are needed to refine the underlying molecular mechanisms of lung cancer preliminarily revealed by GWAS and reach results that are medically actionable. Cancer Epidemiol Biomarkers Prev; 27(4); 363-79. ©2018 AACRSee all articles in this CEBP Focus section, "Genome-Wide Association Studies in Cancer."
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Affiliation(s)
- Yohan Bossé
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, Canada.
- Department of Molecular Medicine, Laval University, Quebec, Canada
| | - Christopher I Amos
- Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
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Orientia tsutsugamushi Modulates Endoplasmic Reticulum-Associated Degradation To Benefit Its Growth. Infect Immun 2017; 86:IAI.00596-17. [PMID: 29109174 DOI: 10.1128/iai.00596-17] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 10/26/2017] [Indexed: 01/11/2023] Open
Abstract
Orientia tsutsugamushi, an obligate intracellular bacterium that is auxotrophic for the aromatic amino acids and histidine, causes scrub typhus, a potentially deadly infection that threatens 1 billion people. O. tsutsugamushi growth is minimal during the first 24 to 48 h of infection but its growth becomes logarithmic thereafter. How the pathogen modulates cellular functions to support its growth is poorly understood. The unfolded protein response (UPR) is a cytoprotective pathway that relieves endoplasmic reticulum (ER) stress by promoting ER-associated degradation (ERAD) of misfolded proteins. Here, we show that O. tsutsugamushi invokes the UPR in the first 48 h and benefits from ER stress in an amino acid-dependent manner. O. tsutsugamushi also impedes ERAD during this time period. By 72 h, ER stress is alleviated and ERAD proceeds unhindered. Sustained inhibition of ERAD using RNA interference results in an O. tsutsugamushi growth defect at 72 h that can be rescued by amino acid supplementation. Thus, O. tsutsugamushi temporally stalls ERAD until ERAD-derived amino acids are needed to support its growth. The O. tsutsugamushi effector Ank4 is linked to this phenomenon. Ank4 interacts with Bat3, a eukaryotic chaperone that is essential for ERAD, and is transiently expressed by O. tsutsugamushi during the infection period when it inhibits ERAD. Ectopically expressed Ank4 blocks ERAD to phenocopy O. tsutsugamushi infection. Our data reveal a novel mechanism by which an obligate intracellular bacterial pathogen modulates ERAD to satisfy its nutritional virulence requirements.
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Ljungman M, Parks L, Hulbatte R, Bedi K. The role of H3K79 methylation in transcription and the DNA damage response. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2017; 780:48-54. [PMID: 31395348 DOI: 10.1016/j.mrrev.2017.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 10/19/2017] [Accepted: 11/15/2017] [Indexed: 12/16/2022]
Abstract
Chromatin plays a critical role in organizing and protecting DNA. However, chromatin acts as an impediment for transcription and DNA repair. Histone modifications, such as H3K79 methylation, promote transcription and genomic stability by enhancing transcription elongation and by serving as landing sites for proteins involved in the DNA damage response. This review summarizes the current understanding of the role of H3K79 methylation in transcription, how it affects genome stability and opportunities to develop impactful therapeutic interventions for cancer.
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Affiliation(s)
- Mats Ljungman
- Department of Radiation Oncology, University of Michigan Comprehensive Cancer Center, Center for RNA Biomedicine, University of Michigan, Ann Arbor, MI, United States; Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, United States.
| | - Luke Parks
- Department of Radiation Oncology, University of Michigan Comprehensive Cancer Center, Center for RNA Biomedicine, University of Michigan, Ann Arbor, MI, United States; Department of Cell and Molecular Biology, Uppsala University, Box 256, 75105 Uppsala, Sweden
| | - Radhika Hulbatte
- Department of Radiation Oncology, University of Michigan Comprehensive Cancer Center, Center for RNA Biomedicine, University of Michigan, Ann Arbor, MI, United States
| | - Karan Bedi
- Department of Radiation Oncology, University of Michigan Comprehensive Cancer Center, Center for RNA Biomedicine, University of Michigan, Ann Arbor, MI, United States
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Structural basis for regulation of the nucleo-cytoplasmic distribution of Bag6 by TRC35. Proc Natl Acad Sci U S A 2017; 114:11679-11684. [PMID: 29042515 DOI: 10.1073/pnas.1702940114] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The metazoan protein BCL2-associated athanogene cochaperone 6 (Bag6) forms a hetero-trimeric complex with ubiquitin-like 4A and transmembrane domain recognition complex 35 (TRC35). This Bag6 complex is involved in tail-anchored protein targeting and various protein quality-control pathways in the cytosol as well as regulating transcription and histone methylation in the nucleus. Here we present a crystal structure of Bag6 and its cytoplasmic retention factor TRC35, revealing that TRC35 is remarkably conserved throughout the opisthokont lineage except at the C-terminal Bag6-binding groove, which evolved to accommodate Bag6, a unique metazoan factor. While TRC35 and its fungal homolog, guided entry of tail-anchored protein 4 (Get4), utilize a conserved hydrophobic patch to bind their respective partners, Bag6 wraps around TRC35 on the opposite face relative to the Get4-5 interface. We further demonstrate that TRC35 binding is critical not only for occluding the Bag6 nuclear localization sequence from karyopherin α to retain Bag6 in the cytosol but also for preventing TRC35 from succumbing to RNF126-mediated ubiquitylation and degradation. The results provide a mechanism for regulation of Bag6 nuclear localization and the functional integrity of the Bag6 complex in the cytosol.
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Rapp J, Jaromi L, Kvell K, Miskei G, Pongracz JE. WNT signaling - lung cancer is no exception. Respir Res 2017; 18:167. [PMID: 28870231 PMCID: PMC5584342 DOI: 10.1186/s12931-017-0650-6] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 08/27/2017] [Indexed: 02/07/2023] Open
Abstract
Since the initial discovery of the oncogenic activity of WNT ligands our understanding of the complex roles for WNT signaling pathways in lung cancers has increased substantially. In the current review, the various effects of activation and inhibition of the WNT signaling pathways are summarized in the context of lung carcinogenesis. Recent evidence regarding WNT ligand transport mechanisms, the role of WNT signaling in lung cancer angiogenesis and drug transporter regulation and the importance of microRNA and posttranscriptional regulation of WNT signaling are also reviewed.
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Affiliation(s)
- Judit Rapp
- Department of Pharmaceutical Biotechnology, School of Pharmacy, University of Pecs, Pecs, Hungary
- Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Luca Jaromi
- Department of Pharmaceutical Biotechnology, School of Pharmacy, University of Pecs, Pecs, Hungary
- Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Krisztian Kvell
- Department of Pharmaceutical Biotechnology, School of Pharmacy, University of Pecs, Pecs, Hungary
- Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Gyorgy Miskei
- Department of Pharmaceutical Biotechnology, School of Pharmacy, University of Pecs, Pecs, Hungary
- Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Judit E. Pongracz
- Department of Pharmaceutical Biotechnology, School of Pharmacy, University of Pecs, Pecs, Hungary
- Szentagothai Research Centre, University of Pecs, Pecs, Hungary
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Clinical significance of novel costimulatory molecule B7-H6 in human breast cancer. Oncol Lett 2017; 14:2405-2409. [PMID: 28789456 DOI: 10.3892/ol.2017.6417] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Accepted: 01/12/2017] [Indexed: 12/14/2022] Open
Abstract
B7 homolog 6 (B7-H6), a member of the B7 family, is as a cell-surface ligand for natural cytotoxicity triggering receptor 3, which is expressed on natural killer cells. It has previously been reported that B7-H6 is undetectable in normal human tissues but is expressed on tumor cells. However, there are few studies focusing on the clinical significance of B7-H6 expression in human carcinoma, with the exception of three studies on ovarian, lung and gastric cancer. The present study investigated the expression of B7-H6 protein in pathologic tissue samples from 305 patients with breast cancer using immunohistochemistry. A high B7-H6 expression level was identified in tissues from 32.13% of patients with breast cancer. These patients were revealed to also exhibit a high expression level of human epidermal growth factor receptor 2, a shorter survival time and a higher rate of lymph node metastasis. Furthermore, the expression level of B7-H6 was not associated with patient age, breast cancer subtype, tumor size, tumor location or estrogen receptor expression. The results of the present study revealed that higher B7-H6 expression level in breast cancer tissues was positively associated with tumor progression. This indicates that B7-H6 is associated with the progression and immunoevasion of human breast cancer; however, the molecular mechanisms underlying this potential effect require further investigation.
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Jones CC, Bush WS, Crawford DC, Wenzlaff AS, Schwartz AG, Wiencke JK, Wrensch MR, Blot WJ, Chanock SJ, Grogan EL, Aldrich MC. Germline Genetic Variants and Lung Cancer Survival in African Americans. Cancer Epidemiol Biomarkers Prev 2017; 26:1288-1295. [PMID: 28619829 DOI: 10.1158/1055-9965.epi-16-0998] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 02/14/2017] [Accepted: 05/17/2017] [Indexed: 11/16/2022] Open
Abstract
Background: African Americans have the highest lung cancer mortality in the United States. Genome-wide association studies (GWASs) of germline variants influencing lung cancer survival have not yet been conducted with African Americans. We examined five previously reported GWAS catalog variants and explored additional genome-wide associations among African American lung cancer cases.Methods: Incident non-small cell lung cancer cases (N = 286) in the Southern Community Cohort Study were genotyped on the Illumina HumanExome BeadChip. We used Cox proportional hazards models to estimate HRs and 95% confidence intervals (CIs) for overall mortality. Two independent African American studies (N = 316 and 298) were used for replication.Results: One previously reported variant, rs1878022 on 12q23.3, was significantly associated with mortality (HR = 0.70; 95% CI: 0.54-0.92). Replication findings were in the same direction, although attenuated (HR = 0.87 and 0.94). Meta-analysis had a HR of 0.83 (95% CI, 0.71-0.97). Analysis of common variants identified an association between chromosome 6q21.33 and mortality (HR = 0.46; 95% CI, 0.33-0.66).Conclusions: We identified an association between rs1878022 in CMKLR1 and lung cancer survival. However, our results in African Americans have a different direction of effect compared with a prior study in European Americans, suggesting a different genetic architecture or presence of gene-environment interactions. We also identified variants on chromosome 6 within the gene-rich HLA region, which has been previously implicated in lung cancer risk and survival.Impact: We found evidence that inherited genetic risk factors influence lung cancer survival in African Americans. Replication in additional populations is necessary to confirm potential genetic differences in lung cancer survival across populations. Cancer Epidemiol Biomarkers Prev; 26(8); 1288-95. ©2017 AACR.
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Affiliation(s)
- Carissa C Jones
- Department of Thoracic Surgery, Vanderbilt University Medical School, Nashville, Tennessee.,Vanderbilt Genetics Institute, Vanderbilt University Medical School, Nashville, Tennessee
| | - William S Bush
- Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Dana C Crawford
- Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Angela S Wenzlaff
- Karmanos Cancer Institute, Wayne State University, Detroit, Michigan
| | - Ann G Schwartz
- Karmanos Cancer Institute, Wayne State University, Detroit, Michigan
| | - John K Wiencke
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, California
| | - Margaret R Wrensch
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, California.,Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California.,Institute of Human Genetics, University of California San Francisco, San Francisco, California
| | - William J Blot
- Division of Epidemiology, Vanderbilt University Medical School, Nashville, Tennessee.,International Epidemiology Institute, Rockville, Maryland
| | - Stephen J Chanock
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
| | - Eric L Grogan
- Department of Thoracic Surgery, Vanderbilt University Medical School, Nashville, Tennessee.,Tennessee Valley Health System Veterans Affairs, Nashville, Tennessee
| | - Melinda C Aldrich
- Department of Thoracic Surgery, Vanderbilt University Medical School, Nashville, Tennessee. .,Vanderbilt Genetics Institute, Vanderbilt University Medical School, Nashville, Tennessee.,Division of Epidemiology, Vanderbilt University Medical School, Nashville, Tennessee
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Extent of pre-translational regulation for the control of nucleocytoplasmic protein localization. BMC Genomics 2016; 17:472. [PMID: 27342569 PMCID: PMC4919871 DOI: 10.1186/s12864-016-2854-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 06/22/2016] [Indexed: 11/18/2022] Open
Abstract
Background Appropriate protein subcellular localization is essential for proper cellular function. Central to the regulation of protein localization are protein targeting motifs, stretches of amino acids serving as guides for protein entry in a specific cellular compartment. While the use of protein targeting motifs is modulated in a post-translational manner, mainly by protein conformational changes and post-translational modifications, the presence of these motifs in proteins can also be regulated in a pre-translational manner. Here, we investigate the extent of pre-translational regulation of the main signals controlling nucleo-cytoplasmic traffic: the nuclear localization signal (NLS) and the nuclear export signal (NES). Results Motif databases and manual curation of the literature allowed the identification of 175 experimentally validated NLSs and 120 experimentally validated NESs in human. Following mapping onto annotated transcripts, these motifs were found to be modular, most (73 % for NLS and 88 % for NES) being encoded entirely in only one exon. The presence of a majority of these motifs is regulated in an alternative manner at the transcript level (61 % for NLS and 72 % for NES) while the remaining motifs are present in all coding isoforms of their encoding gene. NLSs and NESs are pre-translationally regulated using four main mechanisms: alternative transcription/translation initiation, alternative translation termination, alternative splicing of the exon encoding the motif and frameshift, the first two being by far the most prevalent mechanisms. Quantitative analysis of the presence of these motifs using RNA-seq data indicates that inclusion of these motifs can be regulated in a tissue-specific and a combinatorial manner, can be altered in disease states in a directed way and that alternative inclusion of these motifs is often used by proteins with diverse interactors and roles in diverse pathways, such as kinases. Conclusions The pre-translational regulation of the inclusion of protein targeting motifs is a prominent and tightly-regulated mechanism that adds another layer in the control of protein subcellular localization. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2854-4) contains supplementary material, which is available to authorized users.
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ÖZSAİT SELÇUK B, KÖMÜRCÜ BAYRAK E, ERGİNEL ÜNALTUNA N. Higher expression level of Bat3 is associated with silencing of theMidn gene in primary mouse cardiomyocytes. Turk J Biol 2016. [DOI: 10.3906/biy-1602-79] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Tanaka H, Takahashi T, Xie Y, Minami R, Yanagi Y, Hayashishita M, Suzuki R, Yokota N, Shimada M, Mizushima T, Kuwabara N, Kato R, Kawahara H. A conserved island of BAG6/Scythe is related to ubiquitin domains and participates in short hydrophobicity recognition. FEBS J 2015; 283:662-77. [PMID: 26663859 DOI: 10.1111/febs.13618] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 11/19/2015] [Accepted: 12/02/2015] [Indexed: 11/27/2022]
Abstract
BAG6 (also called Scythe) interacts with the exposed hydrophobic regions of newly synthesized proteins and escorts them to the degradation machinery through mechanisms that remain to be elucidated. In this study, we provide evidence that BAG6 physically interacts with the model defective protein substrate CL1 in a manner that depends directly on its short hydrophobicity. We found that the N terminus of BAG6 contains an evolutionarily conserved island tentatively designated the BAG6 ubiquitin-linked domain. Partial deletion of this domain in the BAG6 N-terminal fragment abolished in cell recognition of polyubiquitinated polypeptides as well as the hydrophobicity-mediated recognition of the CL1 degron in cell and in vitro. These observations suggest a mechanism whereby the BAG6 ubiquitin-linked domain provides a platform for discriminating substrates with shorter hydrophobicity stretches as a signal for defective proteins.
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Affiliation(s)
- Hirofumi Tanaka
- Department of Biological Sciences, Tokyo Metropolitan University, Japan
| | - Toshiki Takahashi
- Department of Biological Sciences, Tokyo Metropolitan University, Japan
| | - Yiming Xie
- Department of Biological Sciences, Tokyo Metropolitan University, Japan
| | - Ryosuke Minami
- Department of Biological Sciences, Tokyo Metropolitan University, Japan.,Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Yuko Yanagi
- Department of Biological Sciences, Tokyo Metropolitan University, Japan
| | | | - Rigel Suzuki
- Department of Biological Sciences, Tokyo Metropolitan University, Japan
| | - Naoto Yokota
- Department of Biological Sciences, Tokyo Metropolitan University, Japan
| | - Masumi Shimada
- Department of Biological Sciences, Tokyo Metropolitan University, Japan.,Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Tsunehiro Mizushima
- Picobiology Institute, Graduate School of Life Science, University of Hyogo, Japan
| | - Naoyuki Kuwabara
- Structural Biology Research Center, Photon Factory, IMSS, High Energy Accelerator Research Organization (KEK), Tsukuba, Japan
| | - Ryuichi Kato
- Structural Biology Research Center, Photon Factory, IMSS, High Energy Accelerator Research Organization (KEK), Tsukuba, Japan
| | - Hiroyuki Kawahara
- Department of Biological Sciences, Tokyo Metropolitan University, Japan
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Cui XA, Zhang H, Ilan L, Liu AX, Kharchuk I, Palazzo AF. mRNA encoding Sec61β, a tail-anchored protein, is localized on the endoplasmic reticulum. J Cell Sci 2015; 128:3398-410. [PMID: 26272916 PMCID: PMC4582399 DOI: 10.1242/jcs.168583] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 08/04/2015] [Indexed: 12/30/2022] Open
Abstract
Although one pathway for the post-translational targeting of tail-anchored proteins to the endoplasmic reticulum (ER) has been well defined, it is unclear whether additional pathways exist. Here, we provide evidence that a subset of mRNAs encoding tail-anchored proteins, including Sec61β and nesprin-2, is partially localized to the surface of the ER in mammalian cells. In particular, Sec61b mRNA can be targeted to, and later maintained on, the ER using both translation-dependent and -independent mechanisms. Our data suggests that this process is independent of p180 (also known as RRBP1), a known mRNA receptor on the ER, and the transmembrane domain recognition complex (TRC) pathway components, TRC40 (also known as ASNA1) and BAT3 (also known as BAG6). In addition, our data indicates that Sec61b mRNA might access translocon-bound ribosomes. Our results show that certain tail-anchored proteins are likely to be synthesized directly on the ER, and this facilitates their membrane insertion. Thus, it is clear that mammalian cells utilize multiple mechanisms to ensure efficient targeting of tail-anchored proteins to the surface of the ER. Highlighted Article: The mRNA encoding certain tail-anchored proteins is directly localized to the surface of the endoplasmic reticulum, facilitating the insertion of newly synthesized proteins into the membrane.
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Affiliation(s)
- Xianying A Cui
- University of Toronto, Department of Biochemistry, 1 King's College Circle, MSB Room 5336, Toronto, ON, M5S 1A8, Canada
| | - Hui Zhang
- University of Toronto, Department of Biochemistry, 1 King's College Circle, MSB Room 5336, Toronto, ON, M5S 1A8, Canada
| | - Lena Ilan
- University of Toronto, Department of Biochemistry, 1 King's College Circle, MSB Room 5336, Toronto, ON, M5S 1A8, Canada
| | - Ai Xin Liu
- University of Toronto, Department of Biochemistry, 1 King's College Circle, MSB Room 5336, Toronto, ON, M5S 1A8, Canada
| | - Iryna Kharchuk
- University of Toronto, Department of Biochemistry, 1 King's College Circle, MSB Room 5336, Toronto, ON, M5S 1A8, Canada
| | - Alexander F Palazzo
- University of Toronto, Department of Biochemistry, 1 King's College Circle, MSB Room 5336, Toronto, ON, M5S 1A8, Canada
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Bromfield E, Aitken RJ, Nixon B. Novel characterization of the HSPA2-stabilizing protein BAG6 in human spermatozoa. Mol Hum Reprod 2015; 21:755-69. [DOI: 10.1093/molehr/gav041] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 07/02/2015] [Indexed: 11/13/2022] Open
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36
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Zhang J, Shen L, Sun LQ. The regulation of radiosensitivity by p53 and its acetylation. Cancer Lett 2015; 363:108-18. [DOI: 10.1016/j.canlet.2015.04.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 04/15/2015] [Accepted: 04/15/2015] [Indexed: 12/26/2022]
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Calderón-González KG, Valero Rustarazo ML, Labra-Barrios ML, Bazán-Méndez CI, Tavera-Tapia A, Herrera-Aguirre ME, Sánchez del Pino MM, Gallegos-Pérez JL, González-Márquez H, Hernández-Hernández JM, León-Ávila G, Rodríguez-Cuevas S, Guisa-Hohenstein F, Luna-Arias JP. Determination of the protein expression profiles of breast cancer cell lines by quantitative proteomics using iTRAQ labelling and tandem mass spectrometry. J Proteomics 2015; 124:50-78. [PMID: 25918110 DOI: 10.1016/j.jprot.2015.04.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 04/11/2015] [Accepted: 04/13/2015] [Indexed: 02/06/2023]
Abstract
UNLABELLED Breast cancer is the principal cancer in women worldwide. Although there are serum tumor markers such as CEA and HER2, they are detected in advanced stages of the disease and used as progression and recurrence markers. Therefore, there is a necessity for the identification of new markers that might lead to an early detection and also provide evidence of an effective treatment. The aim of this work was to determine the differential protein expression profiles of four breast cancer cell lines in comparison to a normal control cell line by iTRAQ labelling and tandem mass spectrometry, in order to identify putative biomarkers of the disease. We identified 1,020 iTRAQ-labelled polypeptides with at least one peptide identified with more than 95% in confidence. Overexpressed polypeptides in all cancer cell lines were 78, whilst the subexpressed were 128. We categorised them with PANTHER program into biological processes, being the metabolic pathways the most affected. We detected six groups of proteins with the STRING program involved in DNA topology, glycolysis, translation initiation, splicing, pentose pathway, and proteasome degradation. The main subexpressed protein network included mitochondrial proteins involved in oxidative phosphorylation. We propose BAG6, DDX39, ANXA8 and COX4 as putative biomarkers in breast cancer. BIOLOGICAL SIGNIFICANCE We report a set of differentially expressed proteins in the MCF7 and T47D (Luminal A), MDA-MB-231 (Claudin low) and SK-BR-3 (HER2(+)) breast cancer cell lines that have not been previously reported in breast cancer disease. From these proteins, we propose BAG6, DDX39, ANXA8 and COX4 as putative biomarkers in breast cancer. On the other hand, we propose sets of unique polypeptides in each breast cancer cell line that can be useful in the classification of different subtypes of breast cancer.
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Affiliation(s)
- Karla Grisel Calderón-González
- Doctorado en Ciencias Biológicas, División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Unidad Iztapalapa, Av. San Rafael Atlixco No. 186, Col. Vicentina, Iztapalapa, C.P. 09340, México, D. F., México.
| | - Ma Luz Valero Rustarazo
- Unidad de Proteómica, Centro de Investigación Príncipe Felipe, C/Rambla del Saler 16, 46012 Valencia, España.
| | - Maria Luisa Labra-Barrios
- Departmento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav-IPN), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Gustavo A. Madero, C.P. 07360, México, D. F., México.
| | - César Isaac Bazán-Méndez
- Departmento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav-IPN), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Gustavo A. Madero, C.P. 07360, México, D. F., México.
| | - Alejandra Tavera-Tapia
- Departmento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav-IPN), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Gustavo A. Madero, C.P. 07360, México, D. F., México.
| | - Maria Esther Herrera-Aguirre
- Departmento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav-IPN), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Gustavo A. Madero, C.P. 07360, México, D. F., México.
| | - Manuel M Sánchez del Pino
- Unidad de Proteómica, Centro de Investigación Príncipe Felipe, C/Rambla del Saler 16, 46012 Valencia, España.
| | | | - Humberto González-Márquez
- Doctorado en Ciencias Biológicas, División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Unidad Iztapalapa, Av. San Rafael Atlixco No. 186, Col. Vicentina, Iztapalapa, C.P. 09340, México, D. F., México.
| | - Jose Manuel Hernández-Hernández
- Departmento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav-IPN), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Gustavo A. Madero, C.P. 07360, México, D. F., México.
| | - Gloria León-Ávila
- Departamento de Zoología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Col. Santo Tomás, Miguel Hidalgo, C.P. 11340, México, D. F., México.
| | - Sergio Rodríguez-Cuevas
- Instituto de Enfermedades de la Mama, Fundación del Cáncer de Mama (FUCAM A.C.), Av. Bordo No. 100, Col. Viejo Ejido de Santa Ursula Coapa, Coyoacán, C.P. 04980, México, D. F., México.
| | - Fernando Guisa-Hohenstein
- Instituto de Enfermedades de la Mama, Fundación del Cáncer de Mama (FUCAM A.C.), Av. Bordo No. 100, Col. Viejo Ejido de Santa Ursula Coapa, Coyoacán, C.P. 04980, México, D. F., México.
| | - Juan Pedro Luna-Arias
- Departmento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav-IPN), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Gustavo A. Madero, C.P. 07360, México, D. F., México.
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Etokebe GE, Zienolddiny S, Kupanovac Z, Enersen M, Balen S, Flego V, Bulat-Kardum L, Radojčić-Badovinac A, Skaug V, Bakke P, Haugen A, Dembic Z. Association of the FAM46A gene VNTRs and BAG6 rs3117582 SNP with non small cell lung cancer (NSCLC) in Croatian and Norwegian populations. PLoS One 2015; 10:e0122651. [PMID: 25884493 PMCID: PMC4401550 DOI: 10.1371/journal.pone.0122651] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2014] [Accepted: 02/11/2015] [Indexed: 12/25/2022] Open
Abstract
We analyzed for associations between a variable number of tandem repeat (VNTR) polymorphism in the Family with sequence similarity 46, member A (FAM46A) gene and a single nucleotide polymorphism (rs3117582) in the BCL2-Associated Athanogene 6 (BAG6) with non small cell lung cancer in Croatian and Norwegian subjects. A total of 503 (262 Croatian and 241Norwegian) non small cell lung cancer patients and 897 controls (568 Croatian and 329 Norwegian) were analyzed. We found that the frequency of allele b (three VNTR repeats) of FAM46A gene was significantly increased in the patients compared to the healthy controls in the Croatian and the combined Croatian and Norwegian subjects. Genotype frequencies of cd (four and five VNTR repeats) and cc (four VNTR repeats homozygote) of the FAM46A gene were significantly decreased in the patients compared to the healthy controls in the Croatian and Norwegian subjects, respectively. Logistic regression analyses revealed FAM46A genotype cc to be an independent predictive factor for non small cell lung cancer risk in the Norwegian subjects after adjustment for age, gender and smoking status. This is the first study to suggest an association between the FAM46A gene VNTR polymorphisms and non small cell lung cancer. We found also that BAG6 rs3117582 SNP was associated with non small cell lung cancer in the Norwegian subjects and the combined Croatian-Norwegian subjects corroborating the earlier finding that BAG6 rs3117582 SNP was associated with lung cancer in Europeans. Logistic regression analyses revealed that genotypes and alleles of BAG6 were independent predictive factor for non small cell lung cancer risk in the Norwegian and combined Croatian-Norwegian subjects, after adjustment for age and gender.
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Affiliation(s)
- Godfrey Essien Etokebe
- Institute for Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
- * E-mail:
| | - Shanbeh Zienolddiny
- Department of Chemical and Biological Working Environment, National Institute of Occupational Health, Oslo, Norway
| | - Zeljko Kupanovac
- Institute for Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
- Section of Pulmology, Department of Internal Medicine, Clinical Hospital Center, University of Rijeka, Rijeka, Croatia
| | - Morten Enersen
- Institute for Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Sanja Balen
- Institute for Transfusion Medicine, Clinical Hospital Center, University of Rijeka, Rijeka, Croatia
| | - Veljko Flego
- Section of Pulmology, Department of Internal Medicine, Clinical Hospital Center, University of Rijeka, Rijeka, Croatia
| | - Ljiljana Bulat-Kardum
- Section of Pulmology, Department of Internal Medicine, Clinical Hospital Center, University of Rijeka, Rijeka, Croatia
| | | | - Vidar Skaug
- Department of Chemical and Biological Working Environment, National Institute of Occupational Health, Oslo, Norway
| | - Per Bakke
- Department of Clinical Sciences, University of Bergen, Bergen, Norway
| | - Aage Haugen
- Department of Chemical and Biological Working Environment, National Institute of Occupational Health, Oslo, Norway
| | - Zlatko Dembic
- Institute for Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
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Tao KY, Li XX, Xu WZ, Wang Y, Zhu SM, Xie HX, Luo WH, Xu YJ, Xu XL. Prognostic role of apoptosis-related gene functional variants in advanced non-small-cell lung cancer patients treated with first-line platinum-based chemotherapy. Onco Targets Ther 2015; 8:147-55. [PMID: 25609982 PMCID: PMC4298310 DOI: 10.2147/ott.s74855] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Single-nucleotide polymorphisms in apoptosis-related genes have been shown to play a role in the efficacy of platinum-based chemotherapy and may influence clinical outcomes. Our study aimed to evaluate the correlations of four functional single-nucleotide polymorphisms − FAS −670 A>G, FAS ligand −844 T>C, survivin −31 G>C, and survivin 9386 C>T – with drug response and clinical outcomes in advanced non-small-cell lung cancer patients who received platinum-based chemotherapy. Materials and methods Polymorphisms were evaluated using the polymerase chain reaction-based restriction fragment-length polymorphism technique. Results Patients with the CC genotype of FAS −670 A>G had worse overall survival (OS) than those with the CT or TT genotype (P=0.044), with median OS values of 20.1 months, 22.8 months, and 26.0 months, respectively. Furthermore, progression-free survival was associated with the FAS −670 A>G polymorphism (P=0.032). In addition, patients with the TC and CC genotypes of survivin 9386 C>T experienced improved survival compared with patients with the TT genotype (median OS 31.4 months and 22.8 months, respectively). Conclusion The functional FAS −670 A>G and survivin 9386 C>T polymorphisms are potential independent prognostic factors in advanced non-small-cell lung cancer patients treated with platinum-based chemotherapy.
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Affiliation(s)
- Kai-Yi Tao
- Department of Thoracic Surgery, Zhejiang Cancer Hospital (Zhejiang Cancer Research Institute), Hangzhou, People's Republic of China
| | - Xian-Xing Li
- Department of Radiology, Zhejiang Cancer Hospital (Zhejiang Cancer Research Institute), Hangzhou, People's Republic of China
| | - Wei-Zhen Xu
- Key Laboratory on Diagnosis and Treatment Technology on Thoracic Cancer, Zhejiang Cancer Hospital (Zhejiang Cancer Research Institute), Hangzhou, People's Republic of China
| | - Yin Wang
- Physical Examination Center, Zhejiang Provincial People's Hospital, Hangzhou, People's Republic of China
| | - Shuang-Mei Zhu
- Department of Radio-Chemotherapy Oncology, Lishui People's Hospital, Sixth Affiliated Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Hua-Xia Xie
- Key Laboratory on Diagnosis and Treatment Technology on Thoracic Cancer, Zhejiang Cancer Hospital (Zhejiang Cancer Research Institute), Hangzhou, People's Republic of China
| | - Wen-Hua Luo
- Department of Radio-Chemotherapy Oncology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Yan-Jun Xu
- Department of Medical Oncology, Zhejiang Cancer Hospital, Hangzhou, People's Republic of China
| | - Xiao-Ling Xu
- Key Laboratory on Diagnosis and Treatment Technology on Thoracic Cancer, Zhejiang Cancer Hospital (Zhejiang Cancer Research Institute), Hangzhou, People's Republic of China ; Department of Medical Oncology, Zhejiang Cancer Hospital, Hangzhou, People's Republic of China
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Xu LX, Li ZH, Tao YF, Li RH, Fang F, Zhao H, Li G, Li YH, Wang J, Feng X, Pan J. Histone acetyltransferase inhibitor II induces apoptosis in glioma cell lines via the p53 signaling pathway. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2014; 33:108. [PMID: 25523932 PMCID: PMC4321714 DOI: 10.1186/s13046-014-0108-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 12/01/2014] [Indexed: 12/21/2022]
Abstract
Background Histone acetyltransferase (HAT) inhibitors can inhibit proliferation and induce apoptosis in cancer cell lines. The novel cell-permeable p300/CREB-binding protein (CBP)-selective HAT inhibitor HATi II can reduce histone H3 acetylation and induce chromatin condensation in HeLa cells. Here, we examined the effects and mechanism of action of HATi II in glioma cell lines. Methods Cell viability was assessed using the CCK-8 assay. Cell cycle analysis was performed using flow cytometry. Apoptosis was evaluated using Annexin V staining and flow cytometry, Hoechst 33342 staining and the TUNEL assay. Expression and cleavage of caspase-3, caspase-9 and poly ADP-ribose polymerase (PARP) were assessed by Western blotting. Statistical analysis was performed using two-tailed Student’s t-tests. The gene expression profiles of U251 glioma cells treated with HATi II or DMSO were analyzed using the Arraystar Human 8 x 60 K LncRNA/mRNA expression array; data was analyzed using MEV (Multi Experiment View) cluster software. Datasets representing genes with altered expression profiles (≥2-fold) derived from the cluster analyses were subjected to gene ontology and pathway analysis. Results HATi II inhibited the proliferation of U251, U87, HS683 and SHG44 cells in a dose-dependent manner. HATi II induced cell cycle arrest at the G2/M phase, and induced significant levels of apoptosis, apoptotic body formation and DNA fragmentation in HATi II-treated U251 and SHG44 cells. HATi II induced cleavage of caspase-3, caspase-9 and PARP in U251 and SHG44 cells. In HATi II-treated U251 cells, 965 genes were upregulated, 984 genes were downregulated and 3492/33327 lncRNAs were differentially expressed. GO analysis showed the differentially expressed genes with known functions are involved in a variety of processes; alcoholism, p53 signaling pathway, cytokine-cytokine receptor interaction and transcriptional mis-regulation in cancer were the four most significant pathways. Upregulation of p53 signaling pathway-related genes in HATi II-treated cells was confirmed by quantitative RT-PCR and Western blotting. Conclusions HATi II inhibits proliferation and induces apoptosis via the caspase-dependent pathway in human glioma cell lines, possibly by activating the p53 signaling pathway. HATi II deserves further investigation as a novel treatment for glioma. Electronic supplementary material The online version of this article (doi:10.1186/s13046-014-0108-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Li-Xiao Xu
- Institute of Pediatric Research, Children's Hospital affiliated to Soochow University, Suzhou, 215006, China.
| | - Zhi-Heng Li
- Institute of Pediatric Research, Children's Hospital affiliated to Soochow University, Suzhou, 215006, China.
| | - Yan-Fang Tao
- Department of Hematology and Oncology, Children's Hospital of Soochow University, Suzhou, 215006, China.
| | - Rong-Hu Li
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou, 215006, China.
| | - Fang Fang
- Institute of Pediatric Research, Children's Hospital affiliated to Soochow University, Suzhou, 215006, China.
| | - He Zhao
- Institute of Pediatric Research, Children's Hospital affiliated to Soochow University, Suzhou, 215006, China.
| | - Gang Li
- Institute of Pediatric Research, Children's Hospital affiliated to Soochow University, Suzhou, 215006, China.
| | - Yan-Hong Li
- Institute of Pediatric Research, Children's Hospital affiliated to Soochow University, Suzhou, 215006, China.
| | - Jian Wang
- Institute of Pediatric Research, Children's Hospital affiliated to Soochow University, Suzhou, 215006, China.
| | - Xing Feng
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou, 215006, China.
| | - Jian Pan
- Department of Hematology and Oncology, Children's Hospital of Soochow University, Suzhou, 215006, China.
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41
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Zhao J, Wang H, Hu W, Jin Y. Effect of HLA-B-associated transcript 3 polymorphisms on lung cancer risk: a meta-analysis. Med Sci Monit 2014; 20:2461-5. [PMID: 25430685 PMCID: PMC4259522 DOI: 10.12659/msm.891141] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background The association between the HLA-B-associated transcript 3 polymorphisms and lung cancer risk is a subject of debate. We conducted a meta-analysis to evaluate the association between these polymorphisms and lung cancer susceptibility. Material/Methods A systematic search of electronic databases (PubMed, EMBASE, Wanfang, and China National Knowledge Infrastructure) was performed. Data were extracted and pooled odds ratios (OR) with 95% confidence intervals (CI) were calculated. Results Ten case-control studies with 37 945 and 56 807 controls were included in this meta-analysis. Overall, a significant association between rs1052486 polymorphism and lung cancer susceptibility was observed (OR=1.07, 95% CI 1.01–1.12, P=0.01). In addition, a significant association was found for rs3117582 polymorphism (OR=1.29, 95% CI 1.22–1.37, P<0.01). Conclusions This meta-analysis suggested that HLA-B-associated transcript 3 polymorphisms are risk factors for lung cancer.
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Affiliation(s)
- Junfei Zhao
- Respiratory Department, The Sixth Affiliated Hospital of Wenzhou Medical University, People's Hospital, Lishui, China (mainland)
| | - Hongyuan Wang
- Respiratory Department, The Sixth Affiliated Hospital of Wenzhou Medical University, People's Hospital, Lishui, China (mainland)
| | - Weizhen Hu
- Respiratory Department, The Sixth Affiliated Hospital of Wenzhou Medical University, People's Hospital, Lishui, China (mainland)
| | - Yuanhong Jin
- Respiratory Department, The Sixth Affiliated Hospital of Wenzhou Medical University, People's Hospital, Lishui, China (mainland)
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Piras IS, Angius A, Andreani M, Testi M, Lucarelli G, Floris M, Marktel S, Ciceri F, La Nasa G, Fleischhauer K, Roncarolo MG, Bulfone A, Gregori S, Bacchetta R. BAT2 and BAT3 polymorphisms as novel genetic risk factors for rejection after HLA-related SCT. Bone Marrow Transplant 2014; 49:1400-1404. [PMID: 25111513 PMCID: PMC4222814 DOI: 10.1038/bmt.2014.177] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 04/24/2014] [Accepted: 06/08/2014] [Indexed: 12/16/2022]
Abstract
The genetic background of donor and recipient is an important factor determining the outcome of allogeneic hematopoietic SCT (allo-HSCT). We applied whole-genome analysis to investigate genetic variants-other than HLA class I and II-associated with negative outcome after HLA-identical sibling allo-HSCT in a cohort of 110 β-Thalassemic patients. We identified two single-nucleotide polymorphisms (SNPs) in BAT2 (A/G) and BAT3 (T/C) genes, SNP rs11538264 and SNP rs10484558, both located in the HLA class III region, in strong linkage disequilibrium between each other (R(2)=0.92). When considered as single SNP, none of them reached a significant association with graft rejection (nominal P<0.00001 for BAT2 SNP rs11538264, and P<0.0001 for BAT3 SNP rs10484558), whereas the BAT2/BAT3 A/C haplotype was present at significantly higher frequency in patients who rejected as compared to those with functional graft (30.0% vs 2.6%, nominal P=1.15 × 10(-8); and adjusted P=0.0071). The BAT2/BAT3 polymorphisms and specifically the A/C haplotype may represent a novel immunogenetic factor associated with graft rejection in patients undergoing allo-HSCT.
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Affiliation(s)
| | - Andrea Angius
- Crs4, Biomedicine, Pula (CA), Italy
- IRGB, CNR, Monserrato (CA), Italy
| | - Marco Andreani
- Laboratory of Immunogenetics and Transplant Biology, IME Foundation, Polyclinic of Tor Vergata University, Rome, Italy
| | - Manuela Testi
- Laboratory of Immunogenetics and Transplant Biology, IME Foundation, Polyclinic of Tor Vergata University, Rome, Italy
| | - Guido Lucarelli
- International Center for Transplantation in Thalassemia and Sickle Cell Anemia, IME Foundation, Polyclinic of Tor Vergata University, Rome, Italy
| | | | - Sarah Marktel
- Pediatric Immuno-Hematology Unit and Bone Marrow Transplantation Unit, Division of Regenerative Medicine, Stem Cells and Gene Therapy, Ospedale San Raffaele IRCCS, Milan
| | - Fabio Ciceri
- Pediatric Immuno-Hematology Unit and Bone Marrow Transplantation Unit, Division of Regenerative Medicine, Stem Cells and Gene Therapy, Ospedale San Raffaele IRCCS, Milan
| | - Giorgio La Nasa
- Centro Trapianti di Midollo Osseo, P.O. “R. Binaghi”, Cagliari, Italy
- Department of Hematology, University of Cagliari, Cagliari, Italy
| | - Katharina Fleischhauer
- Unit of Molecular and Functional Immunogenetics, Division of Regenerative Medicine, Stem Cells and Gene Therapy, San Raffaele Scientific Institute, Milan, Italy
| | - Maria Grazia Roncarolo
- San Raffaele Telethon Institute for Gene Therapy (HSRTIGET), Division of Regenerative Medicine, Stem Cells, and Gene Therapy, San Raffaele Scientific Institute, Milan, Italy
- Universita’ Vita-Salute, San Raffaele Scientific Institute, Milano, Italy
| | | | - Silvia Gregori
- San Raffaele Telethon Institute for Gene Therapy (HSRTIGET), Division of Regenerative Medicine, Stem Cells, and Gene Therapy, San Raffaele Scientific Institute, Milan, Italy
| | - Rosa Bacchetta
- San Raffaele Telethon Institute for Gene Therapy (HSRTIGET), Division of Regenerative Medicine, Stem Cells, and Gene Therapy, San Raffaele Scientific Institute, Milan, Italy
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43
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Song Z, Zhao D, Yang L. Metabolism of minor isoforms of prion proteins: Cytosolic prion protein and transmembrane prion protein. Neural Regen Res 2014; 8:2868-78. [PMID: 25206608 PMCID: PMC4146015 DOI: 10.3969/j.issn.1673-5374.2013.30.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 09/09/2013] [Indexed: 12/24/2022] Open
Abstract
Transmissible spongiform encephalopathy or prion disease is triggered by the conversion from cellular prion protein to pathogenic prion protein. Growing evidence has concentrated on prion protein configuration changes and their correlation with prion disease transmissibility and pathogenicity. In vivo and in vitro studies have shown that several cytosolic forms of prion protein with specific topological structure can destroy intracellular stability and contribute to prion protein pathogenicity. In this study, the latest molecular chaperone system associated with endoplasmic reticulum-associated protein degradation, the endoplasmic reticulum resident protein quality-control system and the ubiquitination proteasome system, is outlined. The molecular chaperone system directly correlates with the prion protein degradation pathway. Understanding the molecular mechanisms will help provide a fascinating avenue for further investigations on prion disease treatment and prion protein-induced neurodegenerative diseases.
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Affiliation(s)
- Zhiqi Song
- State Key Laboratory for Agrobiotechnology, National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Deming Zhao
- State Key Laboratory for Agrobiotechnology, National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Lifeng Yang
- State Key Laboratory for Agrobiotechnology, National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
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44
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Piras IS, Angius A, Andreani M, Testi M, Lucarelli G, Floris M, Marktel S, Ciceri F, La Nasa G, Fleischhauer K, Roncarolo MG, Bulfone A, Gregori S, Bacchetta R. BAT2 and BAT3 polymorphisms as novel genetic risk factors for rejection after HLA-related SCT. Bone Marrow Transplant 2014. [PMID: 25111513 DOI: 10.1038/bmt.2014.241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The genetic background of donor and recipient is an important factor determining the outcome of allogeneic hematopoietic SCT (allo-HSCT). We applied whole-genome analysis to investigate genetic variants-other than HLA class I and II-associated with negative outcome after HLA-identical sibling allo-HSCT in a cohort of 110 β-Thalassemic patients. We identified two single-nucleotide polymorphisms (SNPs) in BAT2 (A/G) and BAT3 (T/C) genes, SNP rs11538264 and SNP rs10484558, both located in the HLA class III region, in strong linkage disequilibrium between each other (R(2)=0.92). When considered as single SNP, none of them reached a significant association with graft rejection (nominal P<0.00001 for BAT2 SNP rs11538264, and P<0.0001 for BAT3 SNP rs10484558), whereas the BAT2/BAT3 A/C haplotype was present at significantly higher frequency in patients who rejected as compared to those with functional graft (30.0% vs 2.6%, nominal P=1.15 × 10(-8); and adjusted P=0.0071). The BAT2/BAT3 polymorphisms and specifically the A/C haplotype may represent a novel immunogenetic factor associated with graft rejection in patients undergoing allo-HSCT.
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Affiliation(s)
| | - Andrea Angius
- Crs4, Biomedicine, Pula (CA), Italy.,IRGB, CNR, Monserrato (CA), Italy
| | - Marco Andreani
- Laboratory of Immunogenetics and Transplant Biology, IME Foundation, Polyclinic of Tor Vergata University, Rome, Italy
| | - Manuela Testi
- Laboratory of Immunogenetics and Transplant Biology, IME Foundation, Polyclinic of Tor Vergata University, Rome, Italy
| | - Guido Lucarelli
- International Center for Transplantation in Thalassemia and Sickle Cell Anemia, IME Foundation, Polyclinic of Tor Vergata University, Rome, Italy
| | | | - Sarah Marktel
- Pediatric Immuno-Hematology Unit and Bone Marrow Transplantation Unit, Division of Regenerative Medicine, Stem Cells and Gene Therapy, Ospedale San Raffaele IRCCS, Milan
| | - Fabio Ciceri
- Pediatric Immuno-Hematology Unit and Bone Marrow Transplantation Unit, Division of Regenerative Medicine, Stem Cells and Gene Therapy, Ospedale San Raffaele IRCCS, Milan
| | - Giorgio La Nasa
- Centro Trapianti di Midollo Osseo, P.O. "R. Binaghi", Cagliari, Italy.,Department of Hematology, University of Cagliari, Cagliari, Italy
| | - Katharina Fleischhauer
- Unit of Molecular and Functional Immunogenetics, Division of Regenerative Medicine, Stem Cells and Gene Therapy, San Raffaele Scientific Institute, Milan, Italy
| | - Maria Grazia Roncarolo
- San Raffaele Telethon Institute for Gene Therapy (HSRTIGET), Division of Regenerative Medicine, Stem Cells, and Gene Therapy, San Raffaele Scientific Institute, Milan, Italy.,Universita' Vita-Salute, San Raffaele Scientific Institute, Milano, Italy
| | | | - Silvia Gregori
- San Raffaele Telethon Institute for Gene Therapy (HSRTIGET), Division of Regenerative Medicine, Stem Cells, and Gene Therapy, San Raffaele Scientific Institute, Milan, Italy
| | - Rosa Bacchetta
- San Raffaele Telethon Institute for Gene Therapy (HSRTIGET), Division of Regenerative Medicine, Stem Cells, and Gene Therapy, San Raffaele Scientific Institute, Milan, Italy
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45
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Chen J, Zang YS, Xiu Q. BAT3 rs1052486 and rs3117582 polymorphisms are associated with lung cancer risk: a meta-analysis. Tumour Biol 2014; 35:9855-8. [PMID: 24989925 DOI: 10.1007/s13277-014-1912-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 04/01/2014] [Indexed: 01/19/2023] Open
Abstract
Several studies have examined the associations of polymorphisms in HLA-B-associated transcript 3 (BAT3) with lung cancer risk. However, the results were conflicting. Thus, a meta-analysis was conducted to determine the relationship between BAT3 polymorphisms and lung cancer risk. Databases including PubMed, EMBASE, and Wanfang were searched. Summary odds ratios (ORs) and corresponding 95 % confidence intervals (CIs) were estimated using random effects models or fixed effects models. Nine studies were included in this meta-analysis. BAT3 rs1052486 was associated with a significantly increased lung cancer risk (OR = 1.06, 95 % CI 1.01-1.12, P = 0.03). This polymorphism was also significantly associated with lung cancer risk in Caucasians (OR = 1.07; 95 % CI, 1.01-1.12; P = 0.02). Furthermore, BAT3 rs3117582 increased lung cancer risk (OR = 1.31, 95 % CI, 1.26-1.35, P < 0.00001). This polymorphism was also significantly associated with squamous carcinoma risk (OR = 1.30; 95 % CI, 1.11-1.52; P = 0.001) and lung cancer risk in smokers (OR = 1.23; 95 % CI, 1.10-1.38; P = 0.0005). This meta-analysis suggested that BAT3 polymorphisms contributed the development of lung cancer.
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Affiliation(s)
- Jiquan Chen
- Department of Respiratory Medicine, Shanghai Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai, 200003, China
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46
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Binici J, Koch J. BAG-6, a jack of all trades in health and disease. Cell Mol Life Sci 2014; 71:1829-37. [PMID: 24305946 PMCID: PMC11114047 DOI: 10.1007/s00018-013-1522-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 10/27/2013] [Accepted: 11/11/2013] [Indexed: 01/25/2023]
Abstract
BCL2-associated athanogene 6 (BAG-6) (also Bat-3/Scythe) was discovered as a gene product of the major histocompatibility complex class III locus. The Xenopus ortholog Scythe was first identified to act as an anti-apoptotic protein. Subsequent studies unraveled that the large BAG-6 protein contributes to a number of cellular processes, including apoptosis, gene regulation, protein synthesis, protein quality control, and protein degradation. In this context, BAG-6 acts as a multifunctional chaperone, which interacts with its target proteins for shuttling to distinct destinations. Nonetheless, as anticipated from its genomic localization, BAG-6 is involved in a variety of immunological pathways such as macrophage function and TH1 response. Most recently, BAG-6 was identified on the plasma membrane of dendritic cells and malignantly transformed cells where it serves as cellular ligand for the activating natural killer (NK) cell receptor NKp30 triggering NK cell cytotoxicity. Moreover, target cells were found to secrete soluble variants of BAG-6 and release BAG-6 on the surface of exosomes, which inhibit or activate NK cell cytotoxicity, respectively. These data suggest that the BAG-6 antigen is an important target to shape a directed immune response or to overcome tumor-immune escape strategies established by soluble BAG-6. This review summarizes the currently known functions of BAG-6, a fascinating multicompetent protein, in health and disease.
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Affiliation(s)
- Janina Binici
- NK Cell Biology, Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Paul-Ehrlich-Strasse 42–44, 60596 Frankfurt am Main, Germany
| | - Joachim Koch
- NK Cell Biology, Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Paul-Ehrlich-Strasse 42–44, 60596 Frankfurt am Main, Germany
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47
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Wu X, Pu X, Lin J. Lung Cancer Susceptibility and Risk Assessment Models. Lung Cancer 2014. [DOI: 10.1002/9781118468791.ch2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Li Y, Mariuzza RA. Structural basis for recognition of cellular and viral ligands by NK cell receptors. Front Immunol 2014; 5:123. [PMID: 24723923 PMCID: PMC3972465 DOI: 10.3389/fimmu.2014.00123] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 03/10/2014] [Indexed: 11/13/2022] Open
Abstract
Natural killer (NK) cells are key components of innate immune responses to tumors and viral infections. NK cell function is regulated by NK cell receptors that recognize both cellular and viral ligands, including major histocompatibility complex (MHC), MHC-like, and non-MHC molecules. These receptors include Ly49s, killer immunoglobulin-like receptors, leukocyte immunoglobulin-like receptors, and NKG2A/CD94, which bind MHC class I (MHC-I) molecules, and NKG2D, which binds MHC-I paralogs such as the stress-induced proteins MICA and ULBP. In addition, certain viruses have evolved MHC-like immunoevasins, such as UL18 and m157 from cytomegalovirus, that act as decoy ligands for NK receptors. A growing number of NK receptor–ligand interaction pairs involving non-MHC molecules have also been identified, including NKp30–B7-H6, killer cell lectin-like receptor G1–cadherin, and NKp80–AICL. Here, we describe crystal structures determined to date of NK cell receptors bound to MHC, MHC-related, and non-MHC ligands. Collectively, these structures reveal the diverse solutions that NK receptors have developed to recognize these molecules, thereby enabling the regulation of NK cytolytic activity by both host and viral ligands.
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Affiliation(s)
- Yili Li
- W. M. Keck Laboratory for Structural Biology, Institute for Bioscience and Biotechnology Research, University of Maryland , Rockville, MD , USA ; Department of Cell Biology and Molecular Genetics, University of Maryland , College Park, MD , USA
| | - Roy A Mariuzza
- W. M. Keck Laboratory for Structural Biology, Institute for Bioscience and Biotechnology Research, University of Maryland , Rockville, MD , USA ; Department of Cell Biology and Molecular Genetics, University of Maryland , College Park, MD , USA
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BAT3 modulates p300-dependent acetylation of p53 and autophagy-related protein 7 (ATG7) during autophagy. Proc Natl Acad Sci U S A 2014; 111:4115-20. [PMID: 24591579 DOI: 10.1073/pnas.1313618111] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Autophagy is regulated by posttranslational modifications, including acetylation. Here we show that HLA-B-associated transcript 3 (BAT3) is essential for basal and starvation-induced autophagy in embryonic day 18.5 BAT3(-/-) mouse embryos and in mouse embryonic fibroblasts (MEFs) through the modulation of p300-dependent acetylation of p53 and ATG7. Specifically, BAT3 increases p53 acetylation and proautophagic p53 target gene expression, while limiting p300-dependent acetylation of ATG7, a mechanism known to inhibit autophagy. In the absence of BAT3 or when BAT3 is located exclusively in the cytosol, autophagy is abrogated, ATG7 is hyperacetylated, p53 acetylation is abolished, and p300 accumulates in the cytosol, indicating that BAT3 regulates the nuclear localization of p300. In addition, the interaction between BAT3 and p300 is stronger in the cytosol than in the nucleus and, during starvation, the level of p300 decreases in the cytosol but increases in the nucleus only in the presence of BAT3. We conclude that BAT3 tightly controls autophagy by modulating p300 intracellular localization, affecting the accessibility of p300 to its substrates, p53 and ATG7.
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50
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Novel regulators of spermatogenesis. Semin Cell Dev Biol 2014; 29:31-42. [PMID: 24594193 DOI: 10.1016/j.semcdb.2014.02.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 02/14/2014] [Accepted: 02/17/2014] [Indexed: 02/07/2023]
Abstract
Spermatogenesis is a multistep process that supports the production of millions of sperm daily. Understanding of the molecular mechanisms that regulate spermatogenesis has been a major focus for decades. Yet, the regulators involved in different cellular processes of spermatogenesis remain largely unknown. Human diseases that result in defective spermatogenesis have provided hints on the molecular mechanisms regulating this process. In this review, we have summarized recent findings on the function and signaling mechanisms of several genes that are known to be associated with disease or pathological processes, including CFTR, CD147, YWK-II and CT genes, and discuss their potential roles in regulating different processes of spermatogenesis.
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