1
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Lee SM, Yoon BH, Lee JW, Jeong IJY, Kim I, Pack CG, Kim YH, Ha CH. Circulating miRNA-4701-3p as a predictive biomarker of cardiovascular disease which induces angiogenesis by inhibition of TOB2. Microvasc Res 2024:104698. [PMID: 38801943 DOI: 10.1016/j.mvr.2024.104698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 05/07/2024] [Accepted: 05/24/2024] [Indexed: 05/29/2024]
Abstract
Angiogenesis is mainly regulated by the delivery of VEGF-dependent signaling to cells. However, the angiogenesis mechanism regulated by VEGF-induced miRNA is still not understood. After VEGF treatment in HUVECs, we screened the changed miRNAs through small-RNA sequencing and found VEGF-induced miR-4701-3p. Furthermore, the GFP reporter gene was used to reveal that TOB2 expression was regulated by miR-4701-3p, and it was found that TOB2 and miR-4701-3p modulation could cause angiogenesis in an in-vitro angiogenic assay. Through the luciferase assay, it was confirmed that the activation of the angiogenic transcription factor MEF2 was regulated by the suppression and overexpression of TOB2 and miR-4701-3p. As a result, MEF2 downstream gene mRNAs that induce angiogenic function were regulated. We used the NCBI GEO datasets to reveal that the expression of TOB2 and MEF2 was significantly changed in cardiovascular disease. Finally, it was confirmed that the expression of circulating miR-4701-3p in the blood of myocardial infarction patients was remarkably increased. In patients with myocardial infarction, circulating miR-4701-3p was increased regardless of age, BMI, and sex, and showed high AUC levels in specificity and sensitivity analysis (AUROC) (AUC = 0.8451, 95 % CI 0.78-0.90). Our data showed TOB2-mediated modulation of MEF2 and its angiogenesis by VEGF-induced miR-4701-3p in vascular endothelial cells. In addition, through bioinformatics analysis using GEO data, changes in TOB2 and MEF2 were revealed in cardiovascular disease. We suggest that circulating miR-4701-3p has high potential as a biomarker for myocardial infarction.
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Affiliation(s)
- Seung Min Lee
- Department of Convergence Medicine and Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Bo Hyun Yoon
- Department of Convergence Medicine and Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jin Woo Lee
- Department of Convergence Medicine and Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - I Jin-Yong Jeong
- Department of Convergence Medicine and Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Inki Kim
- Department of Convergence Medicine and Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; ConveRgence mEDIcine research cenTer (CREDIT), Asan Institute for Life Sciences, Asan Medical Center, Seoul, Republic of Korea
| | - Chan-Gi Pack
- Department of Convergence Medicine and Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; ConveRgence mEDIcine research cenTer (CREDIT), Asan Institute for Life Sciences, Asan Medical Center, Seoul, Republic of Korea
| | - Young-Hak Kim
- Cardiology Division, Asan Medical Center and University of Ulsan College of Medicine, Seoul, Republic of Korea.
| | - Chang Hoon Ha
- Department of Convergence Medicine and Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
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2
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Barrera-Ochoa CA, Fonseca-Camarillo G, Vega-Memije ME, Furuzawa-Carballeda J, Uriarte-Ruiz K, Fernández-Camargo DA, Yamamoto-Furusho JK. Differential expression of TOB/BTG family members in patients with plaque psoriasis: cross-sectional study. Immunol Res 2024; 72:234-241. [PMID: 37874431 DOI: 10.1007/s12026-023-09427-8] [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: 05/02/2023] [Accepted: 10/03/2023] [Indexed: 10/25/2023]
Abstract
TOB/BTG is a family of antiproliferative proteins that play an important role in the regulation of immune responses, acting as lymphocyte activators and macrophage-mediated cytotoxicity. No previous studies have explored their role in patients with psoriasis. The aim of this study was to characterize the expression of TOB/BTG family and their co-localization in skin from patients with psoriasis. This is an exploratory, observational, and cross-sectional study that included 24 plaque psoriasis patients and 15 controls. Gene expression of TOB/BTG family was determinate by RT-PCR. Protein products of TOB/BTG were evaluated by immunohistochemistry and compared with control skin tissues. Holm-Sidak's multiple comparisons test was performed. TOB/BTG family mRNA levels and protein expression were significantly decreased in psoriatic skin tissue compared to non-inflammatory control skin tissue. Double-positive cell TOB1/2, BTG1,2 and BTG4/CD16 expressions were found in normal control skin tissues through epidermis and dermis (p < 0.001) and lesser percentage in patients with mild, almost absent in moderate-severe plaque psoriasis. This is the first report of the TOB/BTG family gene and protein expression in skin tissues by a CD16 + subpopulation in plaque psoriasis. TOB/BTG family protein might represent a new therapeutic target among immune-mediated inflammatory diseases.
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Affiliation(s)
- Carlos A Barrera-Ochoa
- Department of Dermatology, Hospital General "Dr. Manuel Gea González", Mexico City, Mexico
| | - Gabriela Fonseca-Camarillo
- Department of Gastroenterology, Inflammatory Bowel Disease Clinic, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga #15, Col. Belisario Domínguez Sección XVI, CP 14080, Mexico City, Mexico
- Departament of Immunology, Instituto Nacional de Cardiología, Ignacio Chávez, Mexico City, Mexico
| | | | - Janette Furuzawa-Carballeda
- Department of Experimental Surgery and Surgery, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Karen Uriarte-Ruiz
- Department of Dermatology, Hospital General "Dr. Manuel Gea González", Mexico City, Mexico
| | - Dheni Aidé Fernández-Camargo
- MD/PhD Program (PECEM), Facultad de Medicina, Universidad Nacional Autónoma de México, Av. Ciudad Universitaria 3000 Coyoacán, C.P. 04360, Mexico City, Mexico
| | - Jesús K Yamamoto-Furusho
- Department of Gastroenterology, Inflammatory Bowel Disease Clinic, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga #15, Col. Belisario Domínguez Sección XVI, CP 14080, Mexico City, Mexico.
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3
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Peng G, Liu T, Qi X, Wang Y, Ren J, Peng J, Du X, Hu S, Wu S, Zhao Y, Li D, Zheng H. A genome-wide CRISPR screening uncovers that TOB1 acts as a key host factor for FMDV infection via both IFN and EGFR mediated pathways. PLoS Pathog 2024; 20:e1012104. [PMID: 38512977 PMCID: PMC10986976 DOI: 10.1371/journal.ppat.1012104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 04/02/2024] [Accepted: 03/07/2024] [Indexed: 03/23/2024] Open
Abstract
The interaction between foot-and-mouth disease virus (FMDV) and the host is extremely important for virus infection, but there are few researches on it, which is not conducive to vaccine development and FMD control. In this study, we designed a porcine genome-scale CRISPR/Cas9 knockout library containing 93,859 single guide RNAs targeting 16,886 protein-coding genes, 25 long ncRNAs, and 463 microRNAs. Using this library, several previously unreported genes required for FMDV infection are highly enriched post-FMDV selection in IBRS-2 cells. Follow-up studies confirmed the dependency of FMDV on these genes, and we identified a functional role for one of the FMDV-related host genes: TOB1 (Transducer of ERBB2.1). TOB1-knockout significantly inhibits FMDV infection by positively regulating the expression of RIG-I and MDA5. We further found that TOB1-knockout led to more accumulation of mRNA transcripts of transcription factor CEBPA, and thus its protein, which further enhanced transcription of RIG-I and MDA5 genes. In addition, TOB1-knockout was shown to inhibit FMDV adsorption and internalization mediated by EGFR/ERBB2 pathway. Finally, the FMDV lethal challenge on TOB1-knockout mice confirmed that the deletion of TOB1 inhibited FMDV infection in vivo. These results identify TOB1 as a key host factor involved in FMDV infection in pigs.
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Affiliation(s)
- Gaochuang Peng
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, China
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Tianran Liu
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, China
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Xiaolan Qi
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Yuzhe Wang
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, China
| | - Jingjing Ren
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Jiangling Peng
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Xuguang Du
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, China
| | - Siyu Hu
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, China
| | - Sen Wu
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, China
| | - Yaofeng Zhao
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, China
| | - Dan Li
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Haixue Zheng
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
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Kulikov EI, Malakheeva LI, Komarchev AS. The role of BTG1 and BTG2 genes and their effects on insulin in poultry. Front Physiol 2024; 15:1315346. [PMID: 38357499 PMCID: PMC10864570 DOI: 10.3389/fphys.2024.1315346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 01/15/2024] [Indexed: 02/16/2024] Open
Affiliation(s)
- Egor Igorevich Kulikov
- Federal Scientific Center, All-Russian Research and Technological Poultry Institute, RAS, Sergiyev Posad, Russia
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Zhao Q, Pavanello L, Bartlam M, Winkler GS. Structure and function of molecular machines involved in deadenylation-dependent 5'-3' mRNA degradation. Front Genet 2023; 14:1233842. [PMID: 37876592 PMCID: PMC10590902 DOI: 10.3389/fgene.2023.1233842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 09/25/2023] [Indexed: 10/26/2023] Open
Abstract
In eukaryotic cells, the synthesis, processing, and degradation of mRNA are important processes required for the accurate execution of gene expression programmes. Fully processed cytoplasmic mRNA is characterised by the presence of a 5'cap structure and 3'poly(A) tail. These elements promote translation and prevent non-specific degradation. Degradation via the deadenylation-dependent 5'-3' degradation pathway can be induced by trans-acting factors binding the mRNA, such as RNA-binding proteins recognising sequence elements and the miRNA-induced repression complex. These factors recruit the core mRNA degradation machinery that carries out the following steps: i) shortening of the poly(A) tail by the Ccr4-Not and Pan2-Pan3 poly (A)-specific nucleases (deadenylases); ii) removal of the 5'cap structure by the Dcp1-Dcp2 decapping complex that is recruited by the Lsm1-7-Pat1 complex; and iii) degradation of the mRNA body by the 5'-3' exoribonuclease Xrn1. In this review, the biochemical function of the nucleases and accessory proteins involved in deadenylation-dependent mRNA degradation will be reviewed with a particular focus on structural aspects of the proteins and enzymes involved.
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Affiliation(s)
- Qi Zhao
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, China
| | - Lorenzo Pavanello
- School of Pharmacy, University of Nottingham, University Park, Nottingham, United Kingdom
| | - Mark Bartlam
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, China
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6
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Peng B, Chen Y, Wang Y, Fu Y, Zeng X, Zhou H, Abulaiti Z, Wang S, Zhang H. BTG2 acts as an inducer of muscle stem cell senescence. Biochem Biophys Res Commun 2023; 669:113-119. [PMID: 37269593 DOI: 10.1016/j.bbrc.2023.05.098] [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: 05/10/2023] [Accepted: 05/24/2023] [Indexed: 06/05/2023]
Abstract
BACKGROUND Muscle aging is associated with muscle stem cell (MuSC) senescence, a process of whose DNA damage accumulation is considered as one of the leading causes. BTG2 had been identified as a mediator of genotoxic and cellular stress signaling pathways, however, its role in senescence of stem cells, including MuSC, remains unknown. METHOD We first compared MuSCs isolated from young and old mice to evaluate our in vitro model of natural senescence. CCK8 and EdU assays were utilized to assess the proliferation capacity of the MuSCs. Cellular senescence was further assessed at biochemical levels by SA-β-Gal and γHA2.X staining, and at molecular levels by quantifying the expression of senescence-associated genes. Next, by performing genetic analysis, we identified Btg2 as a potential regulator of MuSC senescence, which was experimentally validated by Btg2 overexpression and knockdown in primary MuSCs. Lastly, we extended our research to humans by analyzing the potential links between BTG2 and muscle function decline in aging. RESULTS BTG2 is highly expressed in MuSCs from elder mice showing senescent phenotypes. Overexpression and knockdown of Btg2 stimulates and prevents MuSCs senescence, respectively. In humans, high level of BTG2 is associated with low muscle mass in aging, and is a risk factor of aging-related diseases, such as diabetic retinopathy and HDL cholesterol. CONCLUSION Our work demonstrates BTG2 as a regulator of MuSC senescence and may serve as an intervention target for muscle aging.
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Affiliation(s)
- Baozhou Peng
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; Advanced Medical Technology Center, The First Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; The Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Yihan Chen
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; The Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Yaning Wang
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; Advanced Medical Technology Center, The First Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; The Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Yixi Fu
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; The Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xinrui Zeng
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; The Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Hanmeng Zhou
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; The Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Zibaidan Abulaiti
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; The Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Shuaiyu Wang
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; The Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Hongbo Zhang
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; Advanced Medical Technology Center, The First Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; The Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.
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7
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Pavanello L, Hall M, Winkler GS. Regulation of eukaryotic mRNA deadenylation and degradation by the Ccr4-Not complex. Front Cell Dev Biol 2023; 11:1153624. [PMID: 37152278 PMCID: PMC10157403 DOI: 10.3389/fcell.2023.1153624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 03/20/2023] [Indexed: 05/09/2023] Open
Abstract
Accurate and precise regulation of gene expression programmes in eukaryotes involves the coordinated control of transcription, mRNA stability and translation. In recent years, significant progress has been made about the role of sequence elements in the 3' untranslated region for the regulation of mRNA degradation, and a model has emerged in which recruitment of the Ccr4-Not complex is the critical step in the regulation of mRNA decay. Recruitment of the Ccr4-Not complex to a target mRNA results in deadenylation mediated by the Caf1 and Ccr4 catalytic subunits of the complex. Following deadenylation, the 5' cap structure is removed, and the mRNA subjected to 5'-3' degradation. Here, the role of the human Ccr4-Not complex in cytoplasmic deadenylation of mRNA is reviewed, with a particular focus on mechanisms of its recruitment to mRNA by sequence motifs in the 3' untranslated region, codon usage, as well as general mechanisms involving the poly(A) tail.
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Affiliation(s)
- Lorenzo Pavanello
- School of Pharmacy, University of Nottingham, University Park, Nottingham, United Kingdom
| | - Michael Hall
- School of Pharmacy, University of Nottingham, University Park, Nottingham, United Kingdom
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Delage L, Lambert M, Bardel É, Kundlacz C, Chartoire D, Conchon A, Peugnet AL, Gorka L, Auberger P, Jacquel A, Soussain C, Destaing O, Delecluse HJ, Delecluse S, Merabet S, Traverse-Glehen A, Salles G, Bachy E, Billaud M, Ghesquières H, Genestier L, Rouault JP, Sujobert P. BTG1 inactivation drives lymphomagenesis and promotes lymphoma dissemination through activation of BCAR1. Blood 2023; 141:1209-1220. [PMID: 36375119 DOI: 10.1182/blood.2022016943] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 10/11/2022] [Accepted: 11/01/2022] [Indexed: 11/16/2022] Open
Abstract
Understanding the functional role of mutated genes in cancer is required to translate the findings of cancer genomics into therapeutic improvement. BTG1 is recurrently mutated in the MCD/C5 subtype of diffuse large B-cell lymphoma (DLBCL), which is associated with extranodal dissemination. Here, we provide evidence that Btg1 knock out accelerates the development of a lethal lymphoproliferative disease driven by Bcl2 overexpression. Furthermore, we show that the scaffolding protein BCAR1 is a BTG1 partner. Moreover, after BTG1 deletion or expression of BTG1 mutations observed in patients with DLBCL, the overactivation of the BCAR1-RAC1 pathway confers increased migration ability in vitro and in vivo. These modifications are targetable with the SRC inhibitor dasatinib, which opens novel therapeutic opportunities in BTG1 mutated DLBCL.
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Affiliation(s)
- Lorric Delage
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Mireille Lambert
- Université de Paris, Institut Cochin, INSERM U1016, Plateforme BioMecan'IC, Biomécanique de la cellule, Paris, France
| | - Émilie Bardel
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Cindy Kundlacz
- Institut de Génomique Fonctionnelle de Lyon, Centre National de la Recherche Scientifique UMR5242, Université Lyon 1, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Dimitri Chartoire
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Axel Conchon
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Anne-Laure Peugnet
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Lucas Gorka
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Patrick Auberger
- Université Côte d'Azur, Centre Méditerranéen de Médecine Moléculaire (C3M), INSERM U1065, Nice, France
| | - Arnaud Jacquel
- Université Côte d'Azur, Centre Méditerranéen de Médecine Moléculaire (C3M), INSERM U1065, Nice, France
| | - Carole Soussain
- Institut Curie, Site de Saint-Cloud, Hematologie, et INSERM U932 Institut Curie, PSL Research University, Paris, France
| | - Olivier Destaing
- Centre de Recherche UGA, INSERM U1209, Institute for Advanced Biosciences, Grenoble, France
| | | | | | - Samir Merabet
- Institut de Génomique Fonctionnelle de Lyon, Centre National de la Recherche Scientifique UMR5242, Université Lyon 1, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Alexandra Traverse-Glehen
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Gilles Salles
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - Emmanuel Bachy
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Marc Billaud
- INSERM Unité Mixte de Recherche (UMR)-U1052, Centre National de la Recherche UMR 5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France
| | - Hervé Ghesquières
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Laurent Genestier
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
| | - Jean-Pierre Rouault
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
- INSERM Unité Mixte de Recherche (UMR)-U1052, Centre National de la Recherche UMR 5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France
| | - Pierre Sujobert
- Centre International de Recherche en Infectiologie (Team LIB), Université Lyon, INSERM, U1111, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, UMR5308, ENS de Lyon, Lyon, France
- Faculté de Médecine Lyon-Sud, Université de Lyon, Oullins, France
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Poetz F, Lebedeva S, Schott J, Lindner D, Ohler U, Stoecklin G. Control of immediate early gene expression by CPEB4-repressor complex-mediated mRNA degradation. Genome Biol 2022; 23:193. [PMID: 36096941 PMCID: PMC9465963 DOI: 10.1186/s13059-022-02760-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 08/23/2022] [Indexed: 01/14/2023] Open
Abstract
Background Cytoplasmic polyadenylation element-binding protein 4 (CPEB4) is known to associate with cytoplasmic polyadenylation elements (CPEs) located in the 3′ untranslated region (UTR) of specific mRNAs and assemble an activator complex promoting the translation of target mRNAs through cytoplasmic polyadenylation. Results Here, we find that CPEB4 is part of an alternative repressor complex that mediates mRNA degradation by associating with the evolutionarily conserved CCR4-NOT deadenylase complex. We identify human CPEB4 as an RNA-binding protein (RBP) with enhanced association to poly(A) RNA upon inhibition of class I histone deacetylases (HDACs), a condition known to cause widespread degradation of poly(A)-containing mRNA. Photoactivatable ribonucleoside-enhanced crosslinking and immunoprecipitation (PAR-CLIP) analysis using endogenously tagged CPEB4 in HeLa cells reveals that CPEB4 preferentially binds to the 3′UTR of immediate early gene mRNAs, at G-containing variants of the canonical U- and A-rich CPE located in close proximity to poly(A) sites. By transcriptome-wide mRNA decay measurements, we find that the strength of CPEB4 binding correlates with short mRNA half-lives and that loss of CPEB4 expression leads to the stabilization of immediate early gene mRNAs. Akin to CPEB4, we demonstrate that CPEB1 and CPEB2 also confer mRNA instability by recruitment of the CCR4-NOT complex. Conclusions While CPEB4 was previously known for its ability to stimulate cytoplasmic polyadenylation, our findings establish an additional function for CPEB4 as the RNA adaptor of a repressor complex that enhances the degradation of short-lived immediate early gene mRNAs. Supplementary Information The online version contains supplementary material available at 10.1186/s13059-022-02760-5.
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Affiliation(s)
- Fabian Poetz
- Division of Biochemistry, Mannheim Institute for Innate Immunoscience (MI3) and Mannheim Cancer Center (MCC), Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Str. 13-17, 68167, Mannheim, Germany.,Center for Molecular Biology of Heidelberg University (ZMBH), 69120, Heidelberg, Germany
| | - Svetlana Lebedeva
- Berlin Institute for Molecular Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine, 10115, Berlin, Germany
| | - Johanna Schott
- Division of Biochemistry, Mannheim Institute for Innate Immunoscience (MI3) and Mannheim Cancer Center (MCC), Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Str. 13-17, 68167, Mannheim, Germany.,Center for Molecular Biology of Heidelberg University (ZMBH), 69120, Heidelberg, Germany
| | - Doris Lindner
- Division of Biochemistry, Mannheim Institute for Innate Immunoscience (MI3) and Mannheim Cancer Center (MCC), Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Str. 13-17, 68167, Mannheim, Germany.,Center for Molecular Biology of Heidelberg University (ZMBH), 69120, Heidelberg, Germany
| | - Uwe Ohler
- Berlin Institute for Molecular Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine, 10115, Berlin, Germany.,Department of Biology, Humboldt Universität Berlin, 10099, Berlin, Germany
| | - Georg Stoecklin
- Division of Biochemistry, Mannheim Institute for Innate Immunoscience (MI3) and Mannheim Cancer Center (MCC), Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Str. 13-17, 68167, Mannheim, Germany. .,Center for Molecular Biology of Heidelberg University (ZMBH), 69120, Heidelberg, Germany.
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10
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Yu Z, Wang L, Zhao J, Song H, Zhao C, Zhao W, Jia M. TOB1 attenuates IRF3-directed antiviral responses by recruiting HDAC8 to specifically suppress IFN-β expression. Commun Biol 2022; 5:943. [PMID: 36085336 PMCID: PMC9463440 DOI: 10.1038/s42003-022-03911-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 08/30/2022] [Indexed: 11/26/2022] Open
Abstract
Interferon regulatory factor 3 (IRF3) is a key transcription factor required for the secretion of type I interferons (IFN-α/β) and initiation of antiviral immune response. However, the negative feedback regulator of IRF3-directed antiviral response remains unknown. In this study, we demonstrated that viral infection induced the interaction of the transducer of ERBB2.1 (TOB1) with IRF3, which bound to the promoter region of Ifnb1 in macrophages. TOB1 inhibited Ifnb1 transcription by disrupting IRF3 binding and recruiting histone deacetylase 8 (HDAC8) to the Ifnb1 promoter region. Consequently, TOB1 attenuated IRF3-directed IFN-β expression in virus-infected macrophages. Tob1 deficiency enhanced antiviral response and suppressed viral replication in vivo. Thus, we identified TOB1 as a feedback inhibitor of host antiviral innate immune response and revealed a mechanism underlying viral immune escape. TOB1 is identified as an interferon regulatory factor 3 (IRF3) binding partner that operates as a negative feedback inhibitor of IFNβ in toll-like receptor and cytosolic nucleic acid receptor sensing pathways.
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11
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Zhong W, Liu H, Li F, lin Y, Ye Y, Xu L, Li S, Chen H, Li C, Lin Y, Zhuang W, Lin Y, Wang Q. Elevated expression of LIF predicts a poor prognosis and promotes cell migration and invasion of clear cell renal cell carcinoma. Front Oncol 2022; 12:934128. [PMID: 35992780 PMCID: PMC9382297 DOI: 10.3389/fonc.2022.934128] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 07/06/2022] [Indexed: 11/13/2022] Open
Abstract
Background Renal cell carcinoma (RCC) is the seventh most common cancer in humans, of which clear cell renal cell carcinoma (ccRCC) accounts for the majority. Recently, although there have been significant breakthroughs in the treatment of ccRCC, the prognosis of targeted therapy is still poor. Leukemia inhibitory factor (LIF) is a pleiotropic protein, which is overexpressed in many cancers and plays a carcinogenic role. In this study, we explored the expression and potential role of LIF in ccRCC. Methods The expression levels and prognostic effects of the LIF gene in ccRCC were detected using TCGA, GEO, ICGC, and ArrayExpress databases. The function of LIF in ccRCC was investigated using a series of cell function approaches. LIF-related genes were identified by weighted gene correlation network analysis (WGCNA). GO and KEGG analyses were performed subsequently. Cox univariate and LASSO analyses were used to develop risk signatures based on LIF-related genes, and the prognostic model was validated in the ICGC and E-MTAB-1980 databases. Then, a nomogram model was constructed for survival prediction and validation of ccRCC patients. To further explore the drug sensitivity between LIF-related genes, we also conducted a drug sensitivity analysis based on the GDSC database. Results The mRNA and protein expression levels of LIF were significantly increased in ccRCC patients. In addition, a high expression of LIF has a poor prognostic effect in ccRCC patients. LIF knockdown can inhibit the migration and invasion of ccRCC cells. By using WGCNA, 97 LIF-related genes in ccRCC were identified. Next, a prognostic risk prediction model including eight LIF-related genes (TOB2, MEPCE, LIF, RGS2, RND3, KLF6, RRP12, and SOCS3) was developed and validated. Survival analysis and ROC curve analysis indicated that the eight LIF-related-gene predictive model had good performance in evaluating patients’ prognosis in different subgroups of ccRCC. Conclusion Our study revealed that LIF plays a carcinogenic role in ccRCC. In addition, we firstly integrated multiple LIF-related genes to set up a risk-predictive model. The model could accurately predict the prognosis of ccRCC, which offers clinical implications for risk stratification, drug screening, and therapeutic decision.
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Affiliation(s)
- Wenting Zhong
- Central Laboratory at the Second Affiliated Hospital of Fujian Traditional Chinese Medical University, Fujian-Macao Science and Technology Cooperation Base of Traditional Chinese Medicine-Oriented Chronic Disease Prevention and Treatment, Innovation and Transformation Center, Fujian University of Traditional Chinese Medicine, Fuzhou, China
- College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Hongxia Liu
- College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Feng Li
- Department of Pathology, Fujian Provincial Hospital, Fuzhou, China
| | - Youyu lin
- College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Yan Ye
- College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Luyun Xu
- College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - ShengZhao Li
- College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Hui Chen
- College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Chengcheng Li
- College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Yuxuan Lin
- College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Wei Zhuang
- Department of Urology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
- *Correspondence: Qingshui Wang, ; Yao Lin, ; ; Wei Zhuang,
| | - Yao Lin
- Central Laboratory at the Second Affiliated Hospital of Fujian Traditional Chinese Medical University, Fujian-Macao Science and Technology Cooperation Base of Traditional Chinese Medicine-Oriented Chronic Disease Prevention and Treatment, Innovation and Transformation Center, Fujian University of Traditional Chinese Medicine, Fuzhou, China
- *Correspondence: Qingshui Wang, ; Yao Lin, ; ; Wei Zhuang,
| | - Qingshui Wang
- Central Laboratory at the Second Affiliated Hospital of Fujian Traditional Chinese Medical University, Fujian-Macao Science and Technology Cooperation Base of Traditional Chinese Medicine-Oriented Chronic Disease Prevention and Treatment, Innovation and Transformation Center, Fujian University of Traditional Chinese Medicine, Fuzhou, China
- College of Life Sciences, Fujian Normal University, Fuzhou, China
- *Correspondence: Qingshui Wang, ; Yao Lin, ; ; Wei Zhuang,
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12
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Zhao J, Zhang X, Gao L, Guo Y, Wang Z, Su C, Zhang H, Chen W, Huang Y. Exogenous insulin promotes the expression of B-cell translocation gene 1 and 2 in chicken pectoralis. Poult Sci 2022; 101:101875. [PMID: 35544956 PMCID: PMC9118148 DOI: 10.1016/j.psj.2022.101875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 03/14/2022] [Accepted: 03/19/2022] [Indexed: 12/03/2022] Open
Abstract
B-cell translocation genes (BTG) have been proved to play important roles in carbohydrate metabolism through modifying insulin homeostasis and glucose metabolism. This study, therefore, was conducted to investigate the effects of exogenous insulin on the expression of BTG1 and BTG2 in chickens. Twenty-four-day-old broilers and layers were fasted for 16 h and randomly assigned to insulin treatment group (subcutaneously injected with 5 IU/kg body weight) or control group (received an equivalent volume of phosphate-buffered saline). Blood glucose concentration was measured, and it showed that the blood glucose concentrations in the layers were significantly (P < 0.05) higher than that in the broilers under fasting state. Response to exogenous insulin, the blood glucose concentrations were greatly reduced in both breeds. Of note, the blood glucose concentration restored to 62% of the basal state at 240 min (P < 0.05) after insulin stimulation in layers, whereas it was still in low level until 240 min in broilers (under fast state). Tissue profiling revealed that both BTG1 and BTG2 were abundantly expressed in the skeletal muscles of broilers. A negative correlation was observed between blood glucose and BTG1 (ρ = −0.289, P = 0.031) /BTG2 (ρ = −0.500, P < 0.001) in pectoralis, and BTG1 (ρ = −0.462, P < 0.001) in pancreas. As blood glucose decreased due to exogenous insulin administration (under fast state), the expression of both BTG1 and BTG2 notably upregulated in birds’ pectoralis at 120 min and/or 240 min, meanwhile pancreas BTG1 was also upregulated. Re-feeding at 120 min elevated the blood glucose and reduced the expression of BTG genes in pectoralis generally. In addition, the change of BTG1 and BTG2 expression showed distinct difference between layers and broilers at 120 min and 240 min after insulin stimulation in pectoralis, pancreas and heart tissue; even after re-feeding at 120 min, BTG2 expression at 240 min after insulin injection was downregulated in the pectoralis of layers, while it was upregulated in that broilers. Collectively, these results indicated that response to exogenous insulin, chicken blood glucose exhibited breed-specific dynamic change, and meanwhile the expressions of both BTG1 and BTG2 genes in chickens were significantly altered by exogenous insulin in a breed- and tissue-specific manner. BTG1 and BTG2 genes may negatively regulate bird's blood glucose by promoting the glucose uptake corporately in pectoralis, and through regulating the insulin secretion in pancreas (especially BTG1).
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13
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Ameerul A, Almasmoum H, Pavanello L, Dominguez C, Sebastiaan Winkler G. Structural model of the human BTG2–PABPC1 complex by combining mutagenesis, NMR chemical shift perturbation data and molecular docking. J Mol Biol 2022; 434:167662. [DOI: 10.1016/j.jmb.2022.167662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/20/2022] [Accepted: 05/24/2022] [Indexed: 11/28/2022]
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14
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Zhang XZ, Chen MJ, Fan PM, Jiang W, Liang SX. BTG2 Serves as a Potential Prognostic Marker and Correlates with Immune Infiltration in Lung Adenocarcinoma. Int J Gen Med 2022; 15:2727-2745. [PMID: 35300128 PMCID: PMC8922043 DOI: 10.2147/ijgm.s340565] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 01/26/2022] [Indexed: 11/23/2022] Open
Abstract
Background B-cell translocation gene 2 (BTG2) has been revealed to be involved in the occurrence and development of multiple cancers. However, the role of BTG2 in lung adenocarcinoma (LUAD) is still ambiguous. Thus, this study aims to investigate the prognostic value of BTG2 and its correlation with immune infiltration in LUAD. Methods The expression of BTG2 in LUAD was analyzed using the TIMER and UALCAN databases. The correlations between BTG2 expression and clinicopathological factors were investigated using the UALCAN databases. The Kaplan–Meier plotter, GEPIA, and TCGA databases were employed to assess the prognostic value of BTG2. The STRING database and Cytoscape software were used to construct an interaction network and mine co-expression genes. The TISIDB database was examined for a correlation between BTG2 and driver genes in LUAD. Enrichment analysis of co-expressed genes and BTG2 was performed using the LinkedOmics database. Finally, the correlations between BTG2 and immune infiltrates were investigated using the TIMER, GEO, and TISIDB database. Results BTG2 was significantly downregulated in LUAD. The decreased expression of BTG2 in LUAD was significantly correlated with higher cancer stages and shorter duration of overall survival. The expressions of BTG2-related co-expression genes were associated with the prognosis in LUAD. The expression of BTG2 was closely associated with the mutations of TP53 and ROS1. Enrichment analysis revealed that BTG2 was significantly correlated with immune‐associated signaling pathways and function. In addition, the expression of BTG2 was found to be closely related to immune infiltration, multiple gene markers of immune cells, chemokines, and chemokine receptors. Conclusion Our findings have effectively demonstrated that BTG2 expression was downregulated in LUAD, indicating poor prognosis. Closely relating to immune cell infiltration, BTG2 may be a promising immune-related biomarker and molecular target for patients with LUAD.
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Affiliation(s)
- Xiao Zhen Zhang
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, 530021, Guangxi Zhuang Autonomous Region, People’s Republic of China
| | - Mao Jian Chen
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, Guangdong, People’s Republic of China
- Department of Respiratory Oncology, Guangxi Medical University Cancer Hospital, Nanning, 530021, Guangxi Zhuang Autonomous Region, People’s Republic of China
| | - Ping Ming Fan
- Department of Breast-Thoracic Tumor Surgery, The First Affiliated Hospital of Hainan Medical University, Haikou, 570102, Hainan, People’s Republic of China
| | - Wei Jiang
- Department of Respiratory Oncology, Guangxi Medical University Cancer Hospital, Nanning, 530021, Guangxi Zhuang Autonomous Region, People’s Republic of China
| | - Shi Xiong Liang
- Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning, 530021, Guangxi Zhuang Autonomous Region, People’s Republic of China
- Correspondence: Shi Xiong Liang; Wei Jiang, Email ;
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15
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Zhang Q, Pavanello L, Potapov A, Bartlam M, Winkler GS. Structure of the human Ccr4-Not nuclease module using X-ray crystallography and electron paramagnetic resonance spectroscopy distance measurements. Protein Sci 2022; 31:758-764. [PMID: 34923703 PMCID: PMC8862426 DOI: 10.1002/pro.4262] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/14/2021] [Accepted: 12/14/2021] [Indexed: 11/11/2022]
Abstract
Regulated degradation of mature, cytoplasmic mRNA is a key step in eukaryotic gene regulation. This process is typically initiated by the recruitment of deadenylase enzymes by cis-acting elements in the 3' untranslated region resulting in the shortening and removal of the 3' poly(A) tail of the target mRNA. The Ccr4-Not complex, a major eukaryotic deadenylase, contains two exoribonuclease subunits with selectivity toward poly(A): Caf1 and Ccr4. The Caf1 deadenylase subunit binds the MIF4G domain of the large subunit CNOT1 (Not1) that is the scaffold of the complex. The Ccr4 nuclease is connected to the complex via its leucine-rich repeat (LRR) domain, which binds Caf1, whereas the catalytic activity of Ccr4 is provided by its EEP domain. While the relative positions of the MIF4G domain of CNOT1, the Caf1 subunit, and the LRR domain of Ccr4 are clearly defined in current models, the position of the EEP nuclease domain of Ccr4 is ambiguous. Here, we use X-ray crystallography, the AlphaFold resource of predicted protein structures, and pulse electron paramagnetic resonance spectroscopy to determine and validate the position of the EEP nuclease domain of Ccr4 resulting in an improved model of the human Ccr4-Not nuclease module.
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Affiliation(s)
- Qionglin Zhang
- Nankai International Advanced Research Institute (Shenzhen Futian), College of Life Sciences, State Key Laboratory of Medicinal Chemical BiologyNankai UniversityTianjinChina
| | - Lorenzo Pavanello
- School of PharmacyUniversity of NottinghamNottinghamUK,Present address:
LifeArcStevenage Bioscience Catalyst Open Innovation CampusStevenageUK
| | - Alexey Potapov
- School of Physics and Astronomy, Sir Peter Mansfield Imaging CentreUniversity of NottinghamNottinghamUK
| | - Mark Bartlam
- Nankai International Advanced Research Institute (Shenzhen Futian), College of Life Sciences, State Key Laboratory of Medicinal Chemical BiologyNankai UniversityTianjinChina
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16
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Ellis RE. Sex Determination in Nematode Germ Cells. Sex Dev 2022:1-18. [PMID: 35172320 PMCID: PMC9378769 DOI: 10.1159/000520872] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 11/02/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Animal germ cells differentiate as sperm or as oocytes. These sexual fates are controlled by complex regulatory pathways to ensure that the proper gametes are made at the appropriate times. SUMMARY Nematodes like Caenorhabditis elegans and its close relatives are ideal models for studying how this regulation works, because the XX animals are self-fertile hermaphrodites that produce both sperm and oocytes. In these worms, germ cells use the same signal transduction pathway that functions in somatic cells. This pathway determines the activity of the transcription factor TRA-1, a Gli protein that can repress male genes. However, the pathway is extensively modified in germ cells, largely by the action of translational regulators like the PUF proteins. Many of these modifications play critical roles in allowing the XX hermaphrodites to make sperm in an otherwise female body. Finally, TRA-1 cooperates with chromatin regulators in the germ line to control the activity of fog-1 and fog-3, which are essential for spermatogenesis. FOG-1 and FOG-3 work together to determine germ cell fates by blocking the translation of oogenic transcripts. Key Messages: Although there is great diversity in how germ cell fates are controlled in other animals, many of the key nematode genes are conserved, and the critical role of translational regulators may be universal.
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Affiliation(s)
- Ronald E Ellis
- Department of Molecular Biology, Rowan University SOM, Stratford, New Jersey, USA
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17
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Wang D, Li Y, Sui S, Cai M, Dong K, Wang P, Liang X, Fu S, Yu J. Involvement of TOB1 on autophagy in gastric cancer AGS cells via decreasing the activation of AKT/mTOR signaling pathway. PeerJ 2022; 10:e12904. [PMID: 35186488 PMCID: PMC8820212 DOI: 10.7717/peerj.12904] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 01/17/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND We previously identified the tumor suppressor gene TOB1 as related to gastric cancer. The purpose of this study was to explore whether TOB1 induces autophagy through the AKT/mTOR signaling pathway in gastric cancer. METHODS Western blotting was used to detect the protein levels of TOB1, LC3, AKT, mTOR, phosphorylated (p) AKT, and p-mTOR. A double fluorescent GFP-RFP-LC3 fusion protein was used to trace autophagy by laser confocal microscopy. Autophagosomes were observed by transmission electron microscopy. RESULTS The conversion of LC3-I to LC3-II and the LC3-II/LC3-I ratio were significantly increased in AGS cells overexpressing TOB1 compared with control cells. Fluorescence imaging showed LC3 puncta at 48 h, and these puncta increased significantly at 72 h after TOB1 transfection compared with control tumor cells. The presence of autophagosomes in AGS cells was observed at 72 h after TOB1 transfection by transmission electron microscopy, and no autophagosomes were found in the control cells. Moreover, the levels of p-AKT and p -mTOR were lower in AGS cells than in control cancer cells. CONCLUSION Our results provide novel insight that TOB1 might suppress gastric cancer by inducing autophagy, possibly through decreasing phosphorylation and the subsequent activation of the AKT/mTOR signaling pathway.
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Affiliation(s)
- Dong Wang
- Scientific Research Centre, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yunlong Li
- Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Shuning Sui
- Scientific Research Centre, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Mengdi Cai
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Ministry of Education, Harbin Medical University, Harbin, China
| | - Kexian Dong
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Ministry of Education, Harbin Medical University, Harbin, China
| | - Ping Wang
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Ministry of Education, Harbin Medical University, Harbin, China
| | - Xiao Liang
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Ministry of Education, Harbin Medical University, Harbin, China
| | - Songbin Fu
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Ministry of Education, Harbin Medical University, Harbin, China
| | - Jingcui Yu
- Scientific Research Centre, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
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18
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Poetz F, Corbo J, Levdansky Y, Spiegelhalter A, Lindner D, Magg V, Lebedeva S, Schweiggert J, Schott J, Valkov E, Stoecklin G. RNF219 attenuates global mRNA decay through inhibition of CCR4-NOT complex-mediated deadenylation. Nat Commun 2021; 12:7175. [PMID: 34887419 PMCID: PMC8660800 DOI: 10.1038/s41467-021-27471-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 11/17/2021] [Indexed: 12/14/2022] Open
Abstract
The CCR4-NOT complex acts as a central player in the control of mRNA turnover and mediates accelerated mRNA degradation upon HDAC inhibition. Here, we explored acetylation-induced changes in the composition of the CCR4-NOT complex by purification of the endogenously tagged scaffold subunit NOT1 and identified RNF219 as an acetylation-regulated cofactor. We demonstrate that RNF219 is an active RING-type E3 ligase which stably associates with CCR4-NOT via NOT9 through a short linear motif (SLiM) embedded within the C-terminal low-complexity region of RNF219. By using a reconstituted six-subunit human CCR4-NOT complex, we demonstrate that RNF219 inhibits deadenylation through the direct interaction of the α-helical SLiM with the NOT9 module. Transcriptome-wide mRNA half-life measurements reveal that RNF219 attenuates global mRNA turnover in cells, with differential requirement of its RING domain. Our results establish RNF219 as an inhibitor of CCR4-NOT-mediated deadenylation, whose loss upon HDAC inhibition contributes to accelerated mRNA turnover.
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Affiliation(s)
- Fabian Poetz
- Division of Biochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, 68167, Mannheim, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), German Cancer Research Center (DKFZ)-ZMBH Alliance, 69120, Heidelberg, Germany
| | - Joshua Corbo
- RNA Biology Laboratory, Center for Cancer Research, National Cancer Institute (NCI), Frederick, MD, 21702-1201, USA
| | - Yevgen Levdansky
- RNA Biology Laboratory, Center for Cancer Research, National Cancer Institute (NCI), Frederick, MD, 21702-1201, USA
| | - Alexander Spiegelhalter
- Division of Biochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, 68167, Mannheim, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), German Cancer Research Center (DKFZ)-ZMBH Alliance, 69120, Heidelberg, Germany
| | - Doris Lindner
- Division of Biochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, 68167, Mannheim, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), German Cancer Research Center (DKFZ)-ZMBH Alliance, 69120, Heidelberg, Germany
| | - Vera Magg
- Department of Infectious Diseases, Molecular Virology, Center for Integrative Infectious Disease Research (CIID), Heidelberg University, 69120, Heidelberg, Germany
| | - Svetlana Lebedeva
- Berlin Institute for Molecular Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine, 10115, Berlin, Germany
| | - Jörg Schweiggert
- Center for Molecular Biology of Heidelberg University (ZMBH), German Cancer Research Center (DKFZ)-ZMBH Alliance, 69120, Heidelberg, Germany
| | - Johanna Schott
- Division of Biochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, 68167, Mannheim, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), German Cancer Research Center (DKFZ)-ZMBH Alliance, 69120, Heidelberg, Germany
| | - Eugene Valkov
- RNA Biology Laboratory, Center for Cancer Research, National Cancer Institute (NCI), Frederick, MD, 21702-1201, USA.
| | - Georg Stoecklin
- Division of Biochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, 68167, Mannheim, Germany.
- Center for Molecular Biology of Heidelberg University (ZMBH), German Cancer Research Center (DKFZ)-ZMBH Alliance, 69120, Heidelberg, Germany.
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He W, Zhang J, Yuan S, Liang M, Chen W, Jin J. Integrative analysis of miRNA-mRNA network in idiopathic membranous nephropathy by bioinformatics analysis. PeerJ 2021; 9:e12271. [PMID: 34703677 PMCID: PMC8487241 DOI: 10.7717/peerj.12271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 09/17/2021] [Indexed: 12/13/2022] Open
Abstract
Background Currently, several specific antigens, M-type receptor for secretory phospholipase A2(PLA2R1), thrombospondin type-1 domain-containing 7A(THSD7A), and neural epidermal growth factor-like 1 protein (NELL-1), are discovered associated with the onset of idiopathic membranous nephropathy (IMN). But the pathomechanisms of IMN still need to be further claried. Understanding the mechanisms of IMN is required to improve its diagnosis and treatment. Methods In this study, we constructed miRNA regulatory networks to investigate IMN development. Moreover, miRNAs and mRNAs that were differentially expressed between Idiopathic Membranous Nephropathy (IMN) patients and normal controls were examined using the GSE115857 dataset and our previous sequence study. DE miRNA target genes were determined based on the FUNRICH software, starBase, miRDB, and miRWalk, and an miRNA-mRNA network was designed using DE-mRNAs that were negatively correlated with DE-miRNAs. The miRNA-mRNA network contained 228 miRNA-mRNA pairs. Thereafter, we conducted KEGG pathway, GO functional annotation, immune-related gene screening, protein interaction networks, and potential hub gene analyses. Furthermore, 10 miRNAs and 10 genes were determined and preliminarily validated using the validation dataset from GEO. Finally, we identified which pair may offer more accurate diagnosis and therapeutic targets for IMN. Results Two miRNA-mRNA pairs, miR-155-5p-FOS and miR-146a-5p-BTG2, were differentially expressed in IMN, indicating that these genes may affect IMN through immune processes. These findings may offer more accurate diagnoses and therapeutic targets for IMN.
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Affiliation(s)
- Wenfang He
- Department of Nephrology, The First Affiliated Hospital of Bengbu Medical College, Anhui, China.,Department of Nephrology, Zhejiang Provincial People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Jinshi Zhang
- Department of Nephrology, Zhejiang Provincial People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Shizhu Yuan
- Department of Nephrology, Zhejiang Provincial People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Mingzhu Liang
- Department of Nephrology, Zhejiang Provincial People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Weidong Chen
- Department of Nephrology, The First Affiliated Hospital of Bengbu Medical College, Anhui, China
| | - Juan Jin
- Department of Nephrology, The First People's Hospital of Hangzhou Lin'an District, Affiliated Lin'an People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
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20
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Huang H, Yu X, Han X, Hao J, Zhao J, Bebek G, Bao S, Prayson RA, Khalil AM, Jankowsky E, Yu JS. Piwil1 Regulates Glioma Stem Cell Maintenance and Glioblastoma Progression. Cell Rep 2021; 34:108522. [PMID: 33406417 PMCID: PMC7837390 DOI: 10.1016/j.celrep.2020.108522] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 10/12/2020] [Accepted: 11/24/2020] [Indexed: 02/06/2023] Open
Abstract
Piwi proteins are a subfamily of Argonaute proteins that maintain germ cells in eukaryotes. However, the role of their human homologs in cancer stem cells, and more broadly in cancer, is poorly understood. Here, we report that Piwi-like family members are overexpressed in glioblastoma (GBM), with Piwil1 (Hiwi) most frequently overexpressed (88%). Piwil1 is enriched in glioma stem-like cells (GSCs) to maintain self-renewal. Silencing Piwil1 in GSCs leads to global changes in gene expression resulting in cell-cycle arrest, senescence, or apoptosis. Piwil1 knockdown increases expression of the transcriptional co-regulator BTG2 and the E3-ubiquitin ligase FBXW7, leading to reduced c-Myc expression, as well as loss of expression of stem cell factors Olig2 and Nestin. Piwil1 regulates mRNA stability of BTG2, FBXW7, and CDKN1B. In animal models of GBM, Piwil1 knockdown suppresses tumor growth and promotes mouse survival. These findings support a role of Piwil1 in GSC maintenance and glioblastoma progression. Huang et al. find that Piwil1 protein is overexpressed in glioblastoma and glioma stem cells (GSCs). Piwil1 maintains GSC self-renewal and survival by regulating gene expression. Targeting Piwil1 extends survival in mouse models of glioblastoma. Piwil1 represents a therapeutic vulnerability.
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Affiliation(s)
- Haidong Huang
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, NE60, Cleveland, OH 44195, USA
| | - Xingjiang Yu
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, NE60, Cleveland, OH 44195, USA
| | - Xiangzi Han
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, NE60, Cleveland, OH 44195, USA
| | - Jing Hao
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, NE60, Cleveland, OH 44195, USA
| | - Jianjun Zhao
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, NE60, Cleveland, OH 44195, USA
| | - Gurkan Bebek
- Department of Nutrition, Center for Proteomics and Bioinformatics, Case Western Reserve University, 10900 Euclid Avenue, BRB 921, Cleveland, OH 44106, USA
| | - Shideng Bao
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, NE60, Cleveland, OH 44195, USA
| | - Richard A Prayson
- Department of Anatomic Pathology, The Robert J. Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Ahmad M Khalil
- Department of Genetics and Genome Sciences, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Eckhard Jankowsky
- Center for RNA Science and Therapeutics, Case Western Reserve University, 10900 Euclid Avenue, Wood Bldg. 137, Cleveland, OH 44106, USA
| | - Jennifer S Yu
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, NE60, Cleveland, OH 44195, USA; Department of Radiation Oncology, Taussig Cancer Institute, Cleveland Clinic, 9500 Euclid Avenue, CA50, Cleveland, OH 44195, USA.
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21
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Cheng YC, Chiang HY, Cheng SJ, Chang HW, Li YJ, Shieh SY. Loss of the tumor suppressor BTG3 drives a pro-angiogenic tumor microenvironment through HIF-1 activation. Cell Death Dis 2020; 11:1046. [PMID: 33311481 PMCID: PMC7732837 DOI: 10.1038/s41419-020-03248-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/15/2020] [Accepted: 11/16/2020] [Indexed: 12/05/2022]
Abstract
B-cell translocation gene 3 (BTG3) is a member of the antiproliferative BTG gene family and is a downstream target of p53. Here, we show that senescence triggered by BTG3 depletion was accompanied by a secretome enriched with cytokines, growth factors, and matrix-remodeling enzymes, which could promote angiogenesis and cell scattering in vitro. We present evidence that at least part of these activities can be explained by elevated HIF-1α activity. Mechanistically, the BTG3 C-terminal domain competes with the coactivator p300 for binding the HIF-1α transactivation domain. The angiogenic promoting effect of BTG3 knockdown was largely diminished upon co-depletion of HIF-1α, indicating that HIF-1α is a major downstream target of BTG3 in the control of angiogenesis. In vivo, ectopic expression of BTG3 suppresses angiogenesis in xenograft tumors; and syngenic tumor growth and metastasis were enhanced in Btg3-null mice. Moreover, analysis of clinical datasets revealed that a higher BTG3/VEGFA expression ratio correlates with improved patient survival in a number of cancer types. Taken together, our findings highlight the non-autonomous regulation of tumor microenvironment by BTG3 while suppressing tumor progression.
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Affiliation(s)
- Yu-Che Cheng
- Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei, 115, Taiwan
| | - Hsin-Yi Chiang
- Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei, 115, Taiwan
| | - Shang-Jung Cheng
- Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei, 115, Taiwan
| | - Hung-Wei Chang
- Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei, 115, Taiwan
| | - Yi-Ju Li
- Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei, 115, Taiwan
| | - Sheau-Yann Shieh
- Institute of Biomedical Sciences, Academia Sinica, 128 Sec. 2, Academia Road, Taipei, 115, Taiwan.
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22
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Sha QQ, Zhang J, Fan HY. A story of birth and death: mRNA translation and clearance at the onset of maternal-to-zygotic transition in mammals†. Biol Reprod 2020; 101:579-590. [PMID: 30715134 DOI: 10.1093/biolre/ioz012] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/18/2019] [Accepted: 01/30/2019] [Indexed: 01/01/2023] Open
Abstract
In mammals, maternal-to-zygotic transition (MZT), or oocyte-to-embryo transition, begins with oocyte meiotic resumption due to the sequential translational activation and destabilization of dormant maternal transcripts stored in the ooplasm. It then continues with the elimination of maternal transcripts during oocyte maturation and fertilization and ends with the full transcriptional activation of the zygotic genome during embryonic development. A hallmark of MZT in mammals is its reliance on translation and the utilization of stored RNAs and proteins, rather than de novo transcription of genes, to sustain meiotic maturation and early development. Impaired maternal mRNA clearance at the onset of MZT prevents zygotic genome activation and causes early arrest of developing embryos. In this review, we discuss recent advances in our knowledge of the mechanisms whereby mRNA translation and degradation are controlled by cytoplasmic polyadenylation and deadenylation which set up the competence of maturing oocyte to accomplish MZT. The emphasis of this review is on the mouse as a model organism for mammals and BTG4 as a licensing factor of MZT under the translational control of the MAPK cascade.
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Affiliation(s)
- Qian-Qian Sha
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, China
| | - Jue Zhang
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, China
| | - Heng-Yu Fan
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, China.,Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province; Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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23
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Chen CYA, Strouz K, Huang KL, Shyu AB. Tob2 phosphorylation regulates global mRNA turnover to reshape transcriptome and impact cell proliferation. RNA (NEW YORK, N.Y.) 2020; 26:1143-1159. [PMID: 32404348 PMCID: PMC7430666 DOI: 10.1261/rna.073528.119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 05/08/2020] [Indexed: 05/24/2023]
Abstract
Tob2, an anti-proliferative protein, promotes deadenylation through recruiting Caf1 deadenylase to the mRNA poly(A) tail by simultaneously interacting with both Caf1 and poly(A)-binding protein (PABP). Previously, we found that changes in Tob2 phosphorylation can alter its PABP-binding ability and deadenylation-promoting function. However, it remained unknown regarding the relevant kinase(s). Moreover, it was unclear whether Tob2 phosphorylation modulates the transcriptome and whether the phosphorylation is linked to Tob2's anti-proliferative function. In this study, we found that c-Jun amino-terminal kinase (JNK) increases phosphorylation of Tob2 at many Ser/Thr sites in the intrinsically disordered region (IDR) that contains two separate PABP-interacting PAM2 motifs. JNK-induced phosphorylation or phosphomimetic mutations at these sites weaken the Tob2-PABP interaction. In contrast, JNK-independent phosphorylation of Tob2 at serine 254 (S254) greatly enhances Tob2 interaction with PABP and its ability to promote deadenylation. We discovered that both PAM2 motifs are required for Tob2 to display these features. Combining mass spectrometry analysis, poly(A) size-distribution profiling, transcriptome-wide mRNA turnover analyses, and cell proliferation assays, we found that the phosphomimetic mutation at S254 (S254D) enhances Tob2's association with PABP, leading to accelerated deadenylation and decay of mRNAs globally. Moreover, the Tob2-S254D mutant accelerates the decay of many transcripts coding for cell cycle related proteins and enhances anti-proliferation function. Our findings reveal a novel mechanism by which Ccr4-Not complex is recruited by Tob2 to the mRNA 3' poly(A)-PABP complex in a phosphorylation dependent manner to promote rapid deadenylation and decay across the transcriptome, eliciting transcriptome reprogramming and suppressed cell proliferation.
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Affiliation(s)
- Chyi-Ying A Chen
- Department of Biochemistry and Molecular Biology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Krista Strouz
- Department of Biochemistry and Molecular Biology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Kai-Lieh Huang
- Department of Biochemistry and Molecular Biology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Ann-Bin Shyu
- Department of Biochemistry and Molecular Biology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
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24
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Hwang SS, Lim J, Yu Z, Kong P, Sefik E, Xu H, Harman CCD, Kim LK, Lee GR, Li HB, Flavell RA. mRNA destabilization by BTG1 and BTG2 maintains T cell quiescence. Science 2020; 367:1255-1260. [DOI: 10.1126/science.aax0194] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 10/22/2019] [Accepted: 02/19/2020] [Indexed: 12/15/2022]
Abstract
T cells maintain a quiescent state prior to activation. As inappropriate T cell activation can cause disease, T cell quiescence must be preserved. Despite its importance, the mechanisms underlying the “quiescent state” remain elusive. Here, we identify BTG1 and BTG2 (BTG1/2) as factors responsible for T cell quiescence. BTG1/2-deficient T cells show an increased proliferation and spontaneous activation due to a global increase in messenger RNA (mRNA) abundance, which reduces the threshold to activation. BTG1/2 deficiency leads to an increase in polyadenylate tail length, resulting in a greater mRNA half-life. Thus, BTG1/2 promote the deadenylation and degradation of mRNA to secure T cell quiescence. Our study reveals a key mechanism underlying T cell quiescence and suggests that low mRNA abundance is a crucial feature for maintaining quiescence.
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Affiliation(s)
- Soo Seok Hwang
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Jaechul Lim
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Zhibin Yu
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
- Shanghai Institute of Immunology, Department of Microbiology and Immunology, Shanghai Jiao Tong University School of Medicine (SJTU-SM), Shanghai 200025, China
- Yale Center for ImmunoMetabolism, Shanghai Jiao Tong University School of Medicine (SJTU-SM), Shanghai 200025, China
| | - Philip Kong
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Esen Sefik
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Hao Xu
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Christian C. D. Harman
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Lark Kyun Kim
- Severance Biomedical Science Institute and BK21 PLUS Project for Medical Sciences, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06230, Republic of Korea
| | - Gap Ryol Lee
- Department of Life Science, Sogang University, Seoul 04107, Republic of Korea
| | - Hua-Bing Li
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
- Shanghai Institute of Immunology, Department of Microbiology and Immunology, Shanghai Jiao Tong University School of Medicine (SJTU-SM), Shanghai 200025, China
- Yale Center for ImmunoMetabolism, Shanghai Jiao Tong University School of Medicine (SJTU-SM), Shanghai 200025, China
| | - Richard A. Flavell
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
- Howard Hughes Medical Institute, Chevy Chase, MD 20815-6789, USA
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25
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The Dynamics of Cytoplasmic mRNA Metabolism. Mol Cell 2020; 77:786-799.e10. [PMID: 31902669 DOI: 10.1016/j.molcel.2019.12.005] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/25/2019] [Accepted: 12/06/2019] [Indexed: 11/23/2022]
Abstract
For all but a few mRNAs, the dynamics of metabolism are unknown. Here, we developed an experimental and analytical framework for examining these dynamics for mRNAs from thousands of genes. mRNAs of mouse fibroblasts exit the nucleus with diverse intragenic and intergenic poly(A)-tail lengths. Once in the cytoplasm, they have a broad (1000-fold) range of deadenylation rate constants, which correspond to cytoplasmic lifetimes. Indeed, with few exceptions, degradation appears to occur primarily through deadenylation-linked mechanisms, with little contribution from either endonucleolytic cleavage or deadenylation-independent decapping. Most mRNA molecules degrade only after their tail lengths fall below 25 nt. Decay rate constants of short-tailed mRNAs vary broadly (1000-fold) and are larger for short-tailed mRNAs that have previously undergone more rapid deadenylation. This coupling helps clear rapidly deadenylated mRNAs, enabling the large range in deadenylation rate constants to impart a similarly large range in stabilities.
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26
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Ma H, Martin K, Dixon D, Hernandez AG, Weber GM. Transcriptome analysis of egg viability in rainbow trout, Oncorhynchus mykiss. BMC Genomics 2019; 20:319. [PMID: 31029084 PMCID: PMC6486991 DOI: 10.1186/s12864-019-5690-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 04/11/2019] [Indexed: 12/31/2022] Open
Abstract
Background Maternal transcripts are accumulated in the oocyte during oogenesis to provide for protein synthesis from oocyte maturation through early embryonic development, when nuclear transcription is silenced. The maternal mRNAs have short poly(A) tails after undergoing post-transcriptional processing necessary for stabilizing them for storage. The transcripts undergo cytoplasmic polyadenylation when they are to be translated. Transcriptome analyses comparing total mRNA and elongated poly(A) mRNA content among eggs of different quality can provide insight into molecular mechanisms affecting egg developmental competence in rainbow trout. The present study used RNA-seq to compare transcriptomes of unfertilized eggs of rainbow trout females yielding different eyeing rates, following rRNA removal and poly(A) retention for construction of the libraries. Results The percentage of embryos to reach the 32-cell stage at 24 h post fertilization was significantly correlated to family eyeing rate, indicating that inviable embryos were developmentally compromised before zygotic genome activation. RNA sequencing identified 2 differentially expressed transcripts (DETs) from total mRNA sequencing comparing females with low-quality (< 5% eyeing), medium-quality (30–50% eyeing), and high-quality (> 80% eyeing) eggs. In contrast, RNA sequencing from poly(A) captured transcripts identified 945 DETs between low- and high-quality eggs, 1012 between low- and medium-quality eggs, and only 2 between medium- and high-quality eggs. The transcripts of mitochondrial genes were enriched with polyadenylated transcript sequencing and they were significantly reduced in low-quality eggs. Similarly, mitochondrial DNA was reduced in low-quality eggs compared with medium- and high-quality eggs. The functional gene analysis classified the 945 DETs between low- and high-quality eggs into 31 functional modules, many of which were related to ribosomal and mitochondrial functions. Other modules involved transcription, translation, cell division, apoptosis, and immune responses. Conclusions Our results indicate that differences in egg quality may be derived from differences in maternal nuclear transcript activation and cytoplasmic polyadenylation before ovulation, as opposed to accumulation and storage of maternal nuclear transcripts during oogenesis. Transcriptome comparisons suggest low-quality eggs suffered from impaired oxidative phosphorylation and translation. The DETs identified in this study provide insight into developmental competence in rainbow trout eggs. Electronic supplementary material The online version of this article (10.1186/s12864-019-5690-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hao Ma
- USDA/ARS National Center for Cool and Cold Water Aquaculture, Kearneysville, WV, USA
| | | | | | | | - Gregory M Weber
- USDA/ARS National Center for Cool and Cold Water Aquaculture, Kearneysville, WV, USA.
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27
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Duchaine TF, Fabian MR. Mechanistic Insights into MicroRNA-Mediated Gene Silencing. Cold Spring Harb Perspect Biol 2019; 11:cshperspect.a032771. [PMID: 29959194 DOI: 10.1101/cshperspect.a032771] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
MicroRNAs (miRNAs) posttranscriptionally regulate gene expression by repressing protein synthesis and exert a broad influence over development, physiology, adaptation, and disease. Over the past two decades, great strides have been made toward elucidating how miRNAs go about shutting down messenger RNA (mRNA) translation and promoting mRNA decay.
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Affiliation(s)
- Thomas F Duchaine
- Department of Biochemistry & Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - Marc R Fabian
- Department of Oncology, McGill University, Montreal, Quebec H3G 1Y6, Canada.,Lady Davis Institute, Jewish General Hospital, Montreal, Quebec H3T 1E2, Canada
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28
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Yan W, Li SX, Gao H, Yang W. Identification of B-cell translocation gene 1-controlled gene networks in diffuse large B-cell lymphoma: A study based on bioinformatics analysis. Oncol Lett 2019; 17:2825-2835. [PMID: 30854058 PMCID: PMC6365947 DOI: 10.3892/ol.2019.9900] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 11/16/2018] [Indexed: 02/06/2023] Open
Abstract
B-cell translocation gene 1 (BTG1) is a member of the BTG/transducer of Erb family. The present study evaluated the impact of BTG1 gene expression on the clinical outcome of diffuse large B-cell lymphoma (DLBCL) and investigated potential mechanisms using the Gene Expression Omnibus (GEO) database. The gene expression profile datasets GSE31312, GSE10846, GSE65420 and GSE87371 were downloaded from the GEO database. BTG1 expression and clinicopathological data were obtained from the GSE31312 dataset. In 498 cases, the expression of BTG1 in DLBCL was associated with treatment response (χ2=19.020; P<0.001) and International Prognostic Index score (χ2=5.320; P=0.025). Using the Kaplan-Meier method, it was identified that the expression of BTG1 was associated with overall survival (OS) and progression-free survival (PFS) times. Univariate and multivariate Cox regression analysis demonstrated that BTG1 was an independent predictive factor for OS and PFS. From the overlapping analysis of 407 BTG1-associated genes and 22,187 DLBCL-associated genes, 401 genes were identified as BTG1-associated DLBCL genes. Pathway analysis revealed that BTG1-associated DLBCL genes were associated with cancer progression and DLBCL signaling pathways. Subsequently, a protein-protein interaction network was constructed of the BTG1-associated genes, which consisted of 235 genes and 601 interactions. Additionally, 24 genes with high degrees in the network were identified as hub genes, which included genes associated with ‘ribosome’ [ribosomal protein (RP) L11, RPL3, RPS29, RPL19, RPL15 and RPL12], ‘cell cycle’ (ubiquitin carboxyl extension protein 52, ATM and Ras homolog family member H), ‘mitogen-activated protein kinase pathway’ (mitogen-activated protein kinase 1), ‘histone modification’ (ASH1-like protein) and ‘transcription/translation’ (eukaryotic translation initiation factor 3 subunit E, eukaryotic translation elongation factor 1 δ, transcription termination factor 1, cAMP responsive element binding protein 1 and RNA polymerase II subunit F). In conclusion, BTG1 may serve as a predictive biomarker for DLBCL prognosis. Additionally, bioinformatics analysis indicated that BTG1 may exhibit key functions in the progression and development of DLBCL.
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Affiliation(s)
- Wei Yan
- Department of Hematology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110022, P.R. China
| | - Shawn Xiang Li
- International College, China Medical University, Shenyang, Liaoning 110022, P.R. China
| | - Hongyu Gao
- Department of Hematology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110022, P.R. China
| | - Wei Yang
- Department of Hematology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110022, P.R. China
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29
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Mugridge JS, Coller J, Gross JD. Structural and molecular mechanisms for the control of eukaryotic 5'-3' mRNA decay. Nat Struct Mol Biol 2018; 25:1077-1085. [PMID: 30518847 DOI: 10.1038/s41594-018-0164-z] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 10/31/2018] [Indexed: 12/15/2022]
Abstract
5'-3' RNA decay pathways are critical for quality control and regulation of gene expression. Structural and biochemical studies have provided insights into the key nucleases that carry out deadenylation, decapping, and exonucleolysis during 5'-3' decay, but detailed understanding of how these activities are coordinated is only beginning to emerge. Here we review recent mechanistic insights into the control of 5'-3' RNA decay, including coupling between translation and decay, coordination between the complexes and activities that process 5' and 3' RNA termini, conformational control of enzymatic activity, liquid phase separation, and RNA modifications.
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Affiliation(s)
- Jeffrey S Mugridge
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA, USA
| | - Jeff Coller
- The Center for RNA Science and Therapeutics, Case Western Reserve University, Cleveland, OH, USA
| | - John D Gross
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA, USA.
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30
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The central region of CNOT1 and CNOT9 stimulates deadenylation by the Ccr4-Not nuclease module. Biochem J 2018; 475:3437-3450. [PMID: 30309886 DOI: 10.1042/bcj20180456] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 10/08/2018] [Accepted: 10/10/2018] [Indexed: 12/12/2022]
Abstract
Regulated degradation of cytoplasmic mRNA is important for the accurate execution of gene expression programmes in eukaryotic cells. A key step in this process is the shortening and removal of the mRNA poly(A) tail, which can be achieved by the recruitment of the multi-subunit Ccr4-Not nuclease complex via sequence-specific RNA-binding proteins or the microRNA machinery. The Ccr4-Not complex contains several modules that are attached to its large subunit CNOT1. Modules include the nuclease module, which associates with the MIF4G domain of CNOT1 and contains the catalytic subunits Caf1 and Ccr4, as well as the module containing the non-catalytic CNOT9 subunit, which binds to the DUF3819 domain of CNOT1. To understand the contributions of the individual modules to the activity of the complex, we have started to reconstitute sub-complexes of the human Ccr4-Not complex containing one or several functional modules. Here, we report the reconstitution of a pentameric complex including a BTG2-Caf1-Ccr4 nuclease module, CNOT9 and the central region of CNOT1 encompassing the MIF4G and DUF3819 domains. By comparing the biochemical activities of the pentameric complex and the nuclease module, we conclude that the CNOT1-CNOT9 components stimulate deadenylation by the nuclease module. In addition, we show that a pentameric complex containing the melanoma-associated CNOT9 P131L variant is able to support deadenylation similar to a complex containing the wild-type CNOT9 protein.
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Ge Y, Li J, Hao Y, Hu Y, Chen D, Wu B, Fang F. MicroRNA-543 functions as an osteogenesis promoter in human periodontal ligament-derived stem cells by inhibiting transducer of ERBB2, 2. J Periodontal Res 2018; 53:832-841. [PMID: 29851072 DOI: 10.1111/jre.12572] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/20/2018] [Indexed: 12/26/2022]
Abstract
BACKGROUND AND OBJECTIVE Previous research has indicated that altered expression of microRNAs (miRNAs) is in connection with osteogenesis of human periodontal ligament-derived stem cells (hPDLSCs). We investigated the mechanisms by which miR-543 promotes osteogenic differentiation of hPDLSCs. MATERIAL AND METHODS First, the expression of miR-543 in hPDLSCs cultured with or without an osteogenic inductive cocktail was explored. Then, the function of miR-543 during osteogenesis of hPDLSCs was investigated by overexpressing and inhibiting miR-543. Next, 3 databases were used to predict target genes of miR-543 and a luciferase report was used to validate the direct regulation of miR-543 on the target gene. Further, a rescue experiment using co-transfection of miR-543 mimic and target mimic was performed to evaluate whether overexpressing the target gene could partly rescue the efficiency of overexpressing miR-543 on osteogenesis in hPDLSCs. RESULTS miR-543 was upregulated during osteogenic differentiation of hPDLSCs. Functional experiments showed that overexpressing miR-543 could enhance osteogenesis, while inhibiting miR-543 resulted in reduced formation of mineralized nodules. The transducer of ERBB2, 2 (TOB2) was identified as a target gene of miR-543 and luciferase report revealed that miR-543 interacts directly with the 3'-untranslated repeat sequence of TOB2 mRNA. Overexpression of miR-543 inhibited the expression of TOB2 in both mRNA and protein levels while inhibiting miR-543 increased. Furthermore, the rescue experiment confirmed the promotional role of miR-543 TOB2 expression could be abrogated by overexpressing TOB2, which also had the effect of reducing osteogenic differentiation. CONCLUSION Our research confirmed that miR-543 is a promoter of osteogenesis in hPDLSCs, acting by inhibiting its target gene TOB2, which suggests that miR-543 may be a potential therapy for bone loss in periodontitis.
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Affiliation(s)
- Y Ge
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - J Li
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Y Hao
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Y Hu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - D Chen
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - B Wu
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - F Fang
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
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Wang H, Hao H, Guo H, Wang Y, Zhang X, Xu L, Yu J. Association between the SNPs of the TOB1 gene and gastric cancer risk in the Chinese Han population of northeast China. J Cancer 2018; 9:1371-1378. [PMID: 29721046 PMCID: PMC5929081 DOI: 10.7150/jca.23805] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 01/21/2018] [Indexed: 01/14/2023] Open
Abstract
The TOB1 (ErbB-2,1) gene is an anti-proliferative factor that has the potential to regulate cell growth and encodes a member of the transducer of erbB-2/B-cell translocation gene protein. The association between the polymorphisms of the TOB1 gene and gastric cancer (GC) risk is still unclear. In this study, 506 GC cases and 548 healthy controls (HCs) were collected to evaluate the association between the eleven SNPs (rs35220381, rs12950561, rs7221352, rs61482741, rs9303568, rs34700818, rs12949115, rs9903822, rs12601477, rs11656976 and rs4626) of the TOB1 gene and GC risk in the population of northeast China. The results showed that there were significant associations of haplotype GCCTTGC, haplotype ATCTTGG, and haplotype GCCACGC with GC risk (P < 0.05, P < 0.001, and P <0.001, respectively). The association between rs12601477 GA+AA genotypes and GC risk was significant among individuals older than 58 (adjusted OR=1.53, 95% CI=1.05-2.22, P< 0.05). The association between rs4626 AG+GG genotypes and GC risk was significant among individuals older than 58 (adjusted OR=1.54, 95% CI = 1.03-2.28, P<0.05). The rs34700818 CT+TT genotypes were associated with a significantly increased risk of T3-T4 (CT+TT vs CC, adjusted OR=1.71, 95% CI= 1.01-2.88, P<0.05) and TNM stage II (CT+TT vs CC, adjusted OR=2.40, 95% CI =1.27-4.52, P<0.01). The rs61482741 CG+GG genotypes were also associated with a significantly increased risk of T3-T4 (CG+GG vs CC, adjusted OR=1.71, 95% CI = 1.01-2.88, P<0.05) and TNM stage II (CG+GG vs CC, adjusted OR=2.40, 95% CI=1.27-4.52, P<0.01). The results suggest that four SNPs (rs12601477, rs4626, rs34700818 and rs61482741) of the TOB1 gene play an important role in the occurrence and development of GC in the Chinese Han population of northeast China.
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Affiliation(s)
- Hui Wang
- Scientific Research Centre, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China.,Department of Blood Transfusion, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China
| | - Huiting Hao
- Scientific Research Centre, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China.,The clinical laboratory, the Tumor Hospital Affiliated to Harbin Medical University, Harbin 150081, China
| | - Haonan Guo
- Scientific Research Centre, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China
| | - Yuanyuan Wang
- Scientific Research Centre, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China
| | - Xuelong Zhang
- Laboratory of Medical Genetics, Harbin Medical University, Harbin 150081, China
| | - Lidan Xu
- Laboratory of Medical Genetics, Harbin Medical University, Harbin 150081, China
| | - Jingcui Yu
- Scientific Research Centre, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China
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Tsui KH, Chiang KC, Lin YH, Chang KS, Feng TH, Juang HH. BTG2 is a tumor suppressor gene upregulated by p53 and PTEN in human bladder carcinoma cells. Cancer Med 2017; 7:184-195. [PMID: 29239139 PMCID: PMC5773943 DOI: 10.1002/cam4.1263] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 09/30/2017] [Accepted: 10/26/2017] [Indexed: 12/11/2022] Open
Abstract
Although widely deemed as a tumor suppressor gene, the role of B-cell translocation gene 2 (BTG2) in bladder cancer is still inconclusive. We investigated the role and regulatory mechanism of BTG2 in bladder cancer. BTG2 expression in human bladder tissues was determined by RT-qPCR and immunoblotting assays. Expressions of BTG2 and PTEN in bladder carcinoma cells were determined by immunoblotting, RT-qPCR, or reporter assays. The 3 H-thymidine incorporation assay, flow cytometry, and the xenograft animal model were used to determine the cell growth. BTG2 expression was lower in human bladder cancer tissues than normal bladder tissues. Highly differentiated bladder cancer cells, RT4, expressed higher BTG2 than the less-differentiated bladder cancer cells, HT1376 and T24. Overexpression of BTG2 in T24 cells inhibited cell growth in vitro and in vivo. Camptothecin and doxorubicin treatments in RT-4 cells or transient overexpression of p53 into p53-mutant HT1376 cells induced p53 and BTG2 expression. Further reporter assays with site-mutation of p53 response element from GGGAAAGTCC to GGAGTCC within BTG2 promoter area showed that p53-induced BTG2 gene expression was dependent on the p53 response element. Ectopic PTEN overexpression in T24 cells blocked the Akt signal pathway which attenuated cell growth via upregualtion of BTG2 gene expression, while reverse effect was found in PTEN-knockdown RT-4 cells. PTEN activity inhibitor (VO-OHpic) treatment decreased BTG2 expression in RT-4 and PTEN-overexpressed T24 cells. Our results suggested that BTG2 functioned as a bladder cancer tumor suppressor gene, and was induced by p53 and PTEN. Modulation of BTG2 expression seems a promising way to treat human bladder cancer.
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Affiliation(s)
- Ke-Hung Tsui
- Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Tao-Yuan, Taiwan
| | - Kun-Chun Chiang
- Zebrafish center, Department of General Surgery, Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Yu-Hsiang Lin
- Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Tao-Yuan, Taiwan.,Graduate Institute of Clinical Medical Science, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan
| | - Kang-Shuo Chang
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan
| | - Tsui-Hsia Feng
- School of Nursing, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan
| | - Horng-Heng Juang
- Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Tao-Yuan, Taiwan.,Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan
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Wang H, Cui Y, Luan J, Zhou X, Li C, Li H, Shi L, Han J. MiR-5100 promotes osteogenic differentiation by targeting Tob2. J Bone Miner Metab 2017; 35:608-615. [PMID: 27873073 DOI: 10.1007/s00774-016-0799-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 10/03/2016] [Indexed: 01/05/2023]
Abstract
MicroRNAs have emerged as pivotal regulators in various physiological and pathological processes, including osteogenesis. Here we discuss the contribution of miR-5100 to osteoblast differentiation and mineralization. We found that miR-5100 was upregulated during osteoblast differentiation in ST2 and MC3T3-E1 cells. Next, we verified that miR-5100 can promote osteogenic differentiation with gain-of-function and loss-of-function experiments. Target prediction analysis and experimental validation demonstrated that Tob2, which acts as a negative regulator of osteogenesis, was negatively regulated by miR-5100. Furthermore, we confirmed that the important bone-related transcription factor osterix, which can be degraded by binding to Tob2, was influenced by miR-5100 during osteoblast differentiation. Collectively, our results revealed a new molecular mechanism that fine-tunes osteoblast differentiation through miR-5100/Tob2/osterix networks.
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Affiliation(s)
- Huaxin Wang
- Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
- Shandong Medical Biotechnological Center, Key Laboratory for Biotech Drugs of the Ministry of Health, Shandong Academy of Medical Sciences, Jinan, China
| | - Yazhou Cui
- Shandong Medical Biotechnological Center, Key Laboratory for Biotech Drugs of the Ministry of Health, Shandong Academy of Medical Sciences, Jinan, China
| | - Jing Luan
- Shandong Medical Biotechnological Center, Key Laboratory for Biotech Drugs of the Ministry of Health, Shandong Academy of Medical Sciences, Jinan, China
| | - Xiaoyan Zhou
- Shandong Medical Biotechnological Center, Key Laboratory for Biotech Drugs of the Ministry of Health, Shandong Academy of Medical Sciences, Jinan, China
| | - Chengzhi Li
- Shandong Medical Biotechnological Center, Key Laboratory for Biotech Drugs of the Ministry of Health, Shandong Academy of Medical Sciences, Jinan, China
| | - Haiying Li
- Shandong Medical Biotechnological Center, Key Laboratory for Biotech Drugs of the Ministry of Health, Shandong Academy of Medical Sciences, Jinan, China
| | - Liang Shi
- Shandong Medical Biotechnological Center, Key Laboratory for Biotech Drugs of the Ministry of Health, Shandong Academy of Medical Sciences, Jinan, China
| | - Jinxiang Han
- Shandong Medical Biotechnological Center, Key Laboratory for Biotech Drugs of the Ministry of Health, Shandong Academy of Medical Sciences, Jinan, China.
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35
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Skeparnias I, Αnastasakis D, Shaukat AN, Grafanaki K, Stathopoulos C. Expanding the repertoire of deadenylases. RNA Biol 2017; 14:1320-1325. [PMID: 28267419 PMCID: PMC5711463 DOI: 10.1080/15476286.2017.1300222] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 02/13/2017] [Accepted: 02/23/2017] [Indexed: 12/20/2022] Open
Abstract
Deadenylases belong to an expanding family of exoribonucleases involved mainly in mRNA stability and turnover, with the exception of PARN which has additional roles in the biogenesis of several important non-coding RNAs, including miRNAs and piRNAs. Recently, PARN in C. elegans and its homolog PNLDC1 in B. mori were reported as the elusive trimmers mediating piRNA biogenesis. In addition, characterization of mammalian PNLDC1 in comparison to PARN, showed that is specifically expressed in embryonic stem and germ cells, as well as during early embryo development. Moreover, its expression is correlated with epigenetic events mediated by the de novo DNMT3b methyltransferase and knockdown in stem cells upregulates important genes that regulate multipotency. The recent data suggest that at least some new deadenylases may have expanded roles in cell metabolism as regulators of gene expression, through mRNA deadenylation, ncRNAs biogenesis and ncRNA-mediated mRNA targeting, linking essential mechanisms that regulate epigenetic control and transition events during differentiation. The possible roles of mammalian PNLDC1 along those dynamic networks are discussed in the light of new extremely important findings.
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Affiliation(s)
- Ilias Skeparnias
- Department of Biochemistry, School of Medicine, University of Patras, Greece
| | | | | | - Katerina Grafanaki
- Department of Biochemistry, School of Medicine, University of Patras, Greece
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Bai Y, Qiao L, Xie N, Shi Y, Liu N, Wang J. Expression and prognosis analyses of the Tob/BTG antiproliferative (APRO) protein family in human cancers. PLoS One 2017; 12:e0184902. [PMID: 28922388 PMCID: PMC5602628 DOI: 10.1371/journal.pone.0184902] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Accepted: 09/01/2017] [Indexed: 12/21/2022] Open
Abstract
Background Despite advances in early diagnosis and treatment, cancer remains the major cause of mortality in the world. The Tob/BTG antiproliferative (APRO) protein family is reported to participate in diverse human diseases. However, there’s little known about their expression and prognostic values in most human cancers. Methods We performed a detailed cancer vs. normal analysis. The mRNA expression levels of APRO family in various cancers were analyzed via the Oncomine database. Moreover, the Kaplan-Meier Plotter and PrognScan databases were used to evaluate the prognostic values. Results We observed that the mRNA expression levels of TOB1-2 and BTG2 were decreased in most cancers compared with normal tissues, while BTG3 was upregulated in most cancers. In survival analyses based on Kaplan-Meier Plotter, TOB1, BTG1 and BTG4 showed significant associations with survival outcome of different subtypes of breast cancer. Decreased BTG2 was related with poor relapse free survival (RFS) in all subtypes of breast cancer. Especially, besides RFS, reduced BTG2 also indicated worse overall survival and distant metastasis free survival in breast cancer patients who were classified as luminal A. Significant prognostic effects of the whole APRO family were also found in lung adenocarcinoma, but not in squamous cell lung carcinoma. In addition, potential correlations between some APRO family members and survival outcomes were also observed in ovarian, colorectal and brain cancer. Conclusions Some members of APRO family showed significant expression differences between cancer and normal tissues, and could be prognostic biomarkers for defined cancer types.
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Affiliation(s)
- Yuru Bai
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Lu Qiao
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Ning Xie
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Yongquan Shi
- Xijing Hospital of Digestive Diseases, Xijing Hospital, the Fourth Military Medical University, Xi’an, Shaanxi Province, China
- State Key Laboratory of Cancer Biology, the Fourth Military Medical University, Xi’an, Shaanxi Province, China
| | - Na Liu
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
- State Key Laboratory of Cancer Biology, the Fourth Military Medical University, Xi’an, Shaanxi Province, China
- * E-mail: (JHW); (NL)
| | - Jinhai Wang
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
- * E-mail: (JHW); (NL)
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37
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Das S, Sarkar D, Das B. The interplay between transcription and mRNA degradation in Saccharomyces cerevisiae. MICROBIAL CELL 2017; 4:212-228. [PMID: 28706937 PMCID: PMC5507684 DOI: 10.15698/mic2017.07.580] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The cellular transcriptome is shaped by both the rates of mRNA synthesis in the nucleus and mRNA degradation in the cytoplasm under a specified condition. The last decade witnessed an exciting development in the field of post-transcriptional regulation of gene expression which underscored a strong functional coupling between the transcription and mRNA degradation. The functional integration is principally mediated by a group of specialized promoters and transcription factors that govern the stability of their cognate transcripts by “marking” them with a specific factor termed “coordinator.” The “mark” carried by the message is later decoded in the cytoplasm which involves the stimulation of one or more mRNA-decay factors, either directly by the “coordinator” itself or in an indirect manner. Activation of the decay factor(s), in turn, leads to the alteration of the stability of the marked message in a selective fashion. Thus, the integration between mRNA synthesis and decay plays a potentially significant role to shape appropriate gene expression profiles during cell cycle progression, cell division, cellular differentiation and proliferation, stress, immune and inflammatory responses, and may enhance the rate of biological evolution.
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Affiliation(s)
- Subhadeep Das
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, India
| | - Debasish Sarkar
- Present Address: Laboratory of Molecular Genetics, Wadsworth Center, New York State Department of Health, Albany, NY 12201-2002, USA
| | - Biswadip Das
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, India
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38
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Chen Y, Chen C, Zhang Z, Xiao H, Mao B, Huang H, Ding C, Lei L, Zhang H, Li J, Jiang M, Wang G. Expression of B-cell translocation gene 2 is associated with favorable prognosis in hepatocellular carcinoma patients and sensitizes irradiation-induced hepatocellular carcinoma cell apoptosis in vitro and in nude mice. Oncol Lett 2017; 13:2366-2372. [PMID: 28454405 DOI: 10.3892/ol.2017.5685] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 07/12/2016] [Indexed: 01/20/2023] Open
Abstract
B-cell translocation gene 2 (BTG2) proteins have been reported to be putative tumor suppressors in various cancer types. The present study first assessed BTG2 expression in 44 human liver cancer tissue specimens, then investigated BTG2 expression in the regulation of hepatocellular carcinoma (HCC) cell apoptosis with or without radiotherapy in vitro and in vivo. The results revealed that BTG2 protein expression was significantly reduced in HCC tissues, and associated with better survival for HCC patients (P=0.05). BTG2 overexpression also sensitized Huh7 cells to radiation-induced apoptosis in vitro and in a nude mouse model, although restoration of BTG2 expression per se did not affect the viability and apoptosis of HCC cells. Future studies would confirm the role of BTG2 in hepatoma, and further develop BTG2 as a therapeutic strategy for controlling HCC.
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Affiliation(s)
- Yuanyuan Chen
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Chuan Chen
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Zhimin Zhang
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - He Xiao
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Bijing Mao
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Huan Huang
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Chenchen Ding
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Lin Lei
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Hui Zhang
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Jian Li
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Mei Jiang
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
| | - Ge Wang
- Cancer Center, Institute of Surgical Research, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China
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Liu R, Cheng Q, Wang X, Chen H, Wang W, Zhang H, Wang L, Song L. The B-cell translocation gene 1 (CgBTG1) identified in oyster Crassostrea gigas exhibit multiple functions in immune response. FISH & SHELLFISH IMMUNOLOGY 2017; 61:68-78. [PMID: 27940367 DOI: 10.1016/j.fsi.2016.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Revised: 11/26/2016] [Accepted: 12/02/2016] [Indexed: 06/06/2023]
Abstract
B-cell translocation gene 1 (BTG1) is a member of the anti-proliferative gene family, which plays important roles in regulation of cell cycle. In the present study, a B-cell translocation gene 1 molecule homologue (designed CgBTG1) are identified and characterized in oyster Crassostrea gigas. CgBTG1 contains a conserved BTG domain with Box A and Box B motifs, and it shares high similarities with both BTG1 and BTG2 proteins in vertebrates. CgBTG1 mRNA is predominantly expressed in hemocytes, and its expression level in hemocytes is significantly up-regulated at 6 h (5.40-fold, p < 0.01) post Vibrio splendidus stimulation. The apoptosis rate of oyster hemocytes is significantly decreased (p < 0.05) after CgBTG1 interfered by dsRNA (dsCgBTG1). This is indicated that CgBTG1 participated in the regulation of oyster hemocytes apoptosis. Furthermore, CgBTG1 could also induce the apoptosis of cancer cells (HeLa, A549 and BEL7402) in vitro. Compared with normal oysters, both vessel-like structures and muscle fibers in CgBTG1 interfered oysters are severely damaged after V. splendidus challenge in paraffin section, considering that CgBTG1 possessed an analogous feature of angiogenesis for maintenance of vessel-like structures in adductor muscle of oyster. The results suggests that CgBTG1 is a multi-functional molecule involved in the immune response of C. gigas against pathogen infection, which provides more clues for intensive studies of BTG family proteins in invertebrates.
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Affiliation(s)
- Rui Liu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Qi Cheng
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Xiudan Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Chen
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weilin Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huan Zhang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Lingling Wang
- Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
| | - Linsheng Song
- Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China.
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40
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Ellis RE. "The persistence of memory"-Hermaphroditism in nematodes. Mol Reprod Dev 2016; 84:144-157. [PMID: 27291983 DOI: 10.1002/mrd.22668] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 06/01/2016] [Indexed: 12/13/2022]
Abstract
Self-fertility has evolved many times in nematodes. This transition often produces an androdioecious species, with XX hermaphrodites and XO males. Although these hermaphrodites resemble females in most respects, early germ cells differentiate as sperm, and late ones as oocytes. The sperm then receive an activation signal, populate the spermathecae, and are stored for later use in self-fertilization. These traits are controlled by complex modifications to the sex-determination and sperm activation pathways, which have arisen independently during the evolution of each hermaphroditic species. This transformation in reproductive strategy then promotes other major changes in the development, evolution, and population structure of these animals. Mol. Reprod. Dev. 84: 144-157, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Ronald E Ellis
- Department of Molecular Biology, Rowan University SOM, Stratford, New Jersey
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41
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Btg2 is a Negative Regulator of Cardiomyocyte Hypertrophy through a Decrease in Cytosolic RNA. Sci Rep 2016; 6:28592. [PMID: 27346836 PMCID: PMC4921833 DOI: 10.1038/srep28592] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 06/06/2016] [Indexed: 12/27/2022] Open
Abstract
Under hypertrophic stimulation, cardiomyocytes enter a hypermetabolic state and accelerate biomass accumulation. Although the molecular pathways that regulate protein levels are well-studied, the functional implications of RNA accumulation and its regulatory mechanisms in cardiomyocytes remain elusive. Here, we have elucidated the quantitative kinetics of RNA in cardiomyocytes through single cell imaging and c-Myc (Myc)-mediated hypermetabolic analytical model using cultured cardiomyocytes. Nascent RNA labeling combined with single cell imaging demonstrated that Myc protein significantly increased the amount of global RNA production per cardiomyocyte. Chromatin immunoprecipitation with high-throughput sequencing clarified that overexpressed Myc bound to a specific set of genes and recruits RNA polymerase II. Among these genes, we identified Btg2 as a novel target of Myc. Btg2 overexpression significantly reduced cardiomyocyte surface area. Conversely, shRNA-mediated knockdown of Btg2 accelerated adrenergic stimulus-induced hypertrophy. Using mass spectrometry analysis, we determined that Btg2 binds a series of proteins that comprise mRNA deadenylation complexes. Intriguingly, Btg2 specifically suppresses cytosolic, but not nuclear, RNA levels. Btg2 knockdown further enhances cytosolic RNA accumulation in cardiomyocytes under adrenergic stimulation, suggesting that Btg2 negatively regulates reactive hypertrophy by negatively regulating RNA accumulation. Our findings provide insight into the functional significance of the mechanisms regulating RNA levels in cardiomyocytes.
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42
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BTG4 is a meiotic cell cycle-coupled maternal-zygotic-transition licensing factor in oocytes. Nat Struct Mol Biol 2016; 23:387-94. [PMID: 27065194 DOI: 10.1038/nsmb.3204] [Citation(s) in RCA: 155] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 03/11/2016] [Indexed: 12/29/2022]
Abstract
The mRNAs stored in oocytes undergo general decay during the maternal-zygotic transition (MZT), and their stability is tightly interconnected with meiotic cell-cycle progression. However, the factors that trigger decay of maternal mRNA and couple this event to oocyte meiotic maturation remain elusive. Here, we identified B-cell translocation gene-4 (BTG4) as an MZT licensing factor in mice. BTG4 bridged CNOT7, a catalytic subunit of the CCR4-NOT deadenylase, to eIF4E, a key translation initiation factor, and facilitated decay of maternal mRNA. Btg4-null females produced morphologically normal oocytes but were infertile, owing to early developmental arrest. The intrinsic MAP kinase cascade in oocytes triggered translation of Btg4 mRNA stored in fully grown oocytes by targeting the 3' untranslated region, thereby coupling CCR4-NOT deadenylase-mediated decay of maternal mRNA with oocyte maturation and fertilization. This is a key step in oocyte cytoplasmic maturation that determines the developmental potential of mammalian embryos.
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Noble DC, Aoki ST, Ortiz MA, Kim KW, Verheyden JM, Kimble J. Genomic Analyses of Sperm Fate Regulator Targets Reveal a Common Set of Oogenic mRNAs in Caenorhabditis elegans. Genetics 2016; 202:221-34. [PMID: 26564160 PMCID: PMC4701086 DOI: 10.1534/genetics.115.182592] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 11/03/2015] [Indexed: 12/18/2022] Open
Abstract
Germ cell specification as sperm or oocyte is an ancient cell fate decision, but its molecular regulation is poorly understood. In Caenorhabditis elegans, the FOG-1 and FOG-3 proteins behave genetically as terminal regulators of sperm fate specification. Both are homologous to well-established RNA regulators, suggesting that FOG-1 and FOG-3 specify the sperm fate post-transcriptionally. We predicted that FOG-1 and FOG-3, as terminal regulators of the sperm fate, might regulate a battery of gamete-specific differentiation genes. Here we test that prediction by exploring on a genomic scale the messenger RNAs (mRNAs) associated with FOG-1 and FOG-3. Immunoprecipitation of the proteins and their associated mRNAs from spermatogenic germlines identifies 81 FOG-1 and 722 FOG-3 putative targets. Importantly, almost all FOG-1 targets are also FOG-3 targets, and these common targets are strongly biased for oogenic mRNAs. The discovery of common target mRNAs suggested that FOG-1 and FOG-3 work together. Consistent with that idea, we find that FOG-1 and FOG-3 proteins co-immunoprecipitate from both intact nematodes and mammalian tissue culture cells and that they colocalize in germ cells. Taking our results together, we propose a model in which FOG-1 and FOG-3 work in a complex to repress oogenic transcripts and thereby promote the sperm fate.
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Affiliation(s)
- Daniel C Noble
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706
| | - Scott T Aoki
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706
| | - Marco A Ortiz
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706
| | - Kyung Won Kim
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706
| | - Jamie M Verheyden
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706
| | - Judith Kimble
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706 Howard Hughes Medical Institute, University of Wisconsin, Madison, Wisconsin 53706
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Lee HS, Kundu J, Kim RN, Shin YK. Transducer of ERBB2.1 (TOB1) as a Tumor Suppressor: A Mechanistic Perspective. Int J Mol Sci 2015; 16:29815-28. [PMID: 26694352 PMCID: PMC4691146 DOI: 10.3390/ijms161226203] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 11/22/2015] [Accepted: 12/08/2015] [Indexed: 01/06/2023] Open
Abstract
Transducer of ERBB2.1 (TOB1) is a tumor-suppressor protein, which functions as a negative regulator of the receptor tyrosine-kinase ERBB2. As most of the other tumor suppressor proteins, TOB1 is inactivated in many human cancers. Homozygous deletion of TOB1 in mice is reported to be responsible for cancer development in the lung, liver, and lymph node, whereas the ectopic overexpression of TOB1 shows anti-proliferation, and a decrease in the migration and invasion abilities on cancer cells. Biochemical studies revealed that the anti-proliferative activity of TOB1 involves mRNA deadenylation and is associated with the reduction of both cyclin D1 and cyclin-dependent kinase (CDK) expressions and the induction of CDK inhibitors. Moreover, TOB1 interacts with an oncogenic signaling mediator, β-catenin, and inhibits β-catenin-regulated gene transcription. TOB1 antagonizes the v-akt murine thymoma viral oncogene (AKT) signaling and induces cancer cell apoptosis by activating BCL2-associated X (BAX) protein and inhibiting the BCL-2 and BCL-XL expressions. The tumor-specific overexpression of TOB1 results in the activation of other tumor suppressor proteins, such as mothers against decapentaplegic homolog 4 (SMAD4) and phosphatase and tensin homolog-10 (PTEN), and blocks tumor progression. TOB1-overexpressing cancer cells have limited potential of growing as xenograft tumors in nude mice upon subcutaneous implantation. This review addresses the molecular basis of TOB1 tumor suppressor function with special emphasis on its regulation of intracellular signaling pathways.
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Affiliation(s)
- Hun Seok Lee
- Research Institute of Pharmaceutical Science, Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Juthika Kundu
- Research Institute of Pharmaceutical Science, Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Ryong Nam Kim
- Research Institute of Pharmaceutical Science, Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
- Tumor Microenvironment Global Core Research Center, Seoul National University, Seoul 08826, Korea.
| | - Young Kee Shin
- Research Institute of Pharmaceutical Science, Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
- Tumor Microenvironment Global Core Research Center, Seoul National University, Seoul 08826, Korea.
- The Center for Anti-cancer Companion Diagnostics, School of Biological Science, Institutes of Entrepreneurial BioConvergence, Seoul National University, Seoul 08826, Korea.
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Bai Y, Tashiro S, Nagatoishi S, Suzuki T, Yan D, Liu R, Tsumoto K, Bartlam M, Yamamoto T. Structural basis for inhibition of the Tob-CNOT7 interaction by a fragment screening approach. Protein Cell 2015; 6:924-8. [PMID: 26518565 PMCID: PMC4656213 DOI: 10.1007/s13238-015-0225-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/29/2022] Open
Affiliation(s)
- Yuwei Bai
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Shinya Tashiro
- Medical Proteomics Laboratory, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
| | - Satoru Nagatoishi
- Medical Proteomics Laboratory, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
| | - Toru Suzuki
- Cell Signal Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Onna-son, Kunigami, Okinawa, 904-0412, Japan
| | - Dongke Yan
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Ruihua Liu
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Kouhei Tsumoto
- Medical Proteomics Laboratory, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan.
| | - Mark Bartlam
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China.
- College of Life Sciences, Nankai University, Tianjin, 300071, China.
| | - Tadashi Yamamoto
- Cell Signal Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Onna-son, Kunigami, Okinawa, 904-0412, Japan
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The enzyme activities of Caf1 and Ccr4 are both required for deadenylation by the human Ccr4-Not nuclease module. Biochem J 2015; 469:169-76. [PMID: 25944446 PMCID: PMC4613498 DOI: 10.1042/bj20150304] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 05/06/2015] [Indexed: 01/02/2023]
Abstract
In eukaryotic cells, the shortening and removal of the poly(A) tail (deadenylation) of cytoplasmic mRNA is a key event in regulated mRNA degradation. A major enzyme involved in deadenylation is the Ccr4-Not deadenylase complex, which can be recruited to its target mRNA by RNA-binding proteins or the miRNA repression complex. In addition to six non-catalytic components, the complex contains two enzymatic subunits with ribonuclease activity: Ccr4 and Caf1 (Pop2). In vertebrates, each deadenylase subunit is encoded by two paralogues: Caf1, which can interact with the anti-proliferative protein BTG2, is encoded by CNOT7 and CNOT8, whereas Ccr4 is encoded by the highly similar genes CNOT6 and CNOT6L. Currently, it is unclear whether the catalytic subunits work co-operatively or whether the nuclease components have unique roles in deadenylation. We therefore developed a method to express and purify a minimal human BTG2-Caf1-Ccr4 nuclease sub-complex from bacterial cells. By using chemical inhibition and well-characterized inactivating amino acid substitutions, we demonstrate that the enzyme activities of Caf1 and Ccr4 are both required for deadenylation in vitro. These results indicate that Caf1 and Ccr4 cooperate in mRNA deadenylation and suggest that the enzyme activities of Caf1 and Ccr4 are regulated via allosteric interactions within the nuclease module.
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Chen Y, Wang C, Wu J, Li L. BTG/Tob family members Tob1 and Tob2 inhibit proliferation of mouse embryonic stem cells via Id3 mRNA degradation. Biochem Biophys Res Commun 2015; 462:208-14. [PMID: 25951976 DOI: 10.1016/j.bbrc.2015.04.117] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 04/18/2015] [Indexed: 02/06/2023]
Abstract
The mammalian BTG/Tob family is a group of proteins with anti-proliferative ability, and there are six members including BTG1, BTG2/PC3/Tis21, BTG3/ANA, BTG4/PC3B, Tob1/Tob and Tob2. Among them, Tob subfamily members, specifically Tob1/Tob and Tob2, have the most extensive C-terminal regions. As previously reported, overexpression of BTG/Tob proteins is associated with the inhibition of G1 to S-phase cell cycle progression and decreased cell proliferation in a variety of cell types. Tob subfamily proteins have similar anti-proliferative effects on cell cycle progression in cultured tumor cells. An important unresolved question is whether or not they have function in rapidly proliferating cells, such as embryonic stem cells (ESCs). Tob1 and Tob2 were expressed ubiquitously in mouse ESCs (mESCs), suggesting a possible role in early embryonic development and mESCs. To address the above question and explore the possible functions of the Tob subfamily in ESCs, we established ESCs from different genotypic knockout inner cell mass (ICM). We found that Tob1(-/-), Tob2(-/-), and Tob1/2 double knockout (DKO, Tob1(-/-) & Tob2(-/-)) ESCs grew faster than wild type (WT) ESCs without losing pluripotency, and we provide a possible mechanistic explanation for these observations: Tob1 and Tob2 inhibit the cell cycle via degradation of Id3 mRNA, which is a set of directly targeted genes of BMP4 signaling in mESCs that play critical roles in the maintenance of ESC properties. Together, our data suggest that BTG/Tob family protein Tob1 and Tob2 regulation cell proliferation does not compromise the basic properties of mESCs.
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Affiliation(s)
- Yuanfan Chen
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China; Peking University Stem Cell Research Center, China National Center for International Research, Peking University Health Science Center, Beijing 100191, China; SARI Center for Stem Cell and Nanomedicine, Shanghai Advanced Research Institute, University of Chinese Academy of Sciences, Shanghai 200120, China
| | - Chenchen Wang
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China; Peking University Stem Cell Research Center, China National Center for International Research, Peking University Health Science Center, Beijing 100191, China; SARI Center for Stem Cell and Nanomedicine, Shanghai Advanced Research Institute, University of Chinese Academy of Sciences, Shanghai 200120, China
| | - Jenny Wu
- SARI Center for Stem Cell and Nanomedicine, Shanghai Advanced Research Institute, University of Chinese Academy of Sciences, Shanghai 200120, China
| | - Lingsong Li
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China; Peking University Stem Cell Research Center, China National Center for International Research, Peking University Health Science Center, Beijing 100191, China; SARI Center for Stem Cell and Nanomedicine, Shanghai Advanced Research Institute, University of Chinese Academy of Sciences, Shanghai 200120, China.
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Lee SE, Hwang SL, Jang WG, Chang HW, Kim YD. B-cell translocation gene 2 promotes hepatic hepcidin production via induction of Yin Yang 1. Biochem Biophys Res Commun 2015; 460:996-1001. [PMID: 25839654 DOI: 10.1016/j.bbrc.2015.03.140] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 03/24/2015] [Indexed: 12/19/2022]
Abstract
Hepcidin is a peptide hormone secreted in the liver and plays a key role in maintaining iron homeostasis. Here, we demonstrate that B-cell translocation gene 2 (BTG2) is a key player in hepatic hepcidin regulation via induction of Yin Yang 1 (YY1). Hepatic hepcidin gene expression significantly enhanced by fasting states and glucagon exposure led to induction of gluconeogenic gene expression, and elevated serum hepcidin production in mice. Notably, overexpression of BTG2 using adenoviral system (Ad-BTG2) significantly elevated serum hepcidin levels via a significant induction of YY1 gene transcription. Immunoprecipitation studies demonstrated that BTG2 physically interacted with YY1 and recruited on the hepcidin gene promoter. Finally, ablation of hepatic BTG2 gene by gene silencing markedly attenuated the elevation of serum hepcidin production along with YY1 and hepcidin mRNA expression in fasting state. Likewise, forskolin (FSK)-stimulated hepcidin promoter activity was dramatically disrupted by endogenous BTG2 knockdown. Overall, our current study provides a novel molecular mechanism of BTG2-mediated induction of hepcidin gene expression, thereby contributing to a better understanding of the hepatic hepcidin production involved in iron homeostasis.
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Affiliation(s)
- Sung-Eun Lee
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Seung-Lark Hwang
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Won-Gu Jang
- Department of Biotechnology, School of Engineering, Daegu University, Gyeongbuk 712-714, Republic of Korea
| | - Hyeun Wook Chang
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749, Republic of Korea.
| | - Yong Deuk Kim
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea.
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Peng K, Wang CY, Wang JH, Sheng JQ, Shi JW, Li J, Hong YJ. Molecular cloning, sequence analysis, and cadmium stress-rated expression changes of BTG1 in freshwater pearl mussel (Hyriopsis schlegelii). DONG WU XUE YAN JIU = ZOOLOGICAL RESEARCH 2015; 35:389-97. [PMID: 25297078 DOI: 10.13918/j.issn.2095-8137.2014.5.389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The B cells translocation gene 1 (BTG1) is a member of the BTG/TOB family of anti-proliferative genes, which have recently emerged as important regulators of cell growth and differentiation among verteates. Here, for the first time we cloned the full-length cDNA sequence of Hyriopsis schlegelii (Hs-BTG1), an economically important freshwater shellfish and potential indicator of environmental heavy metal pollution, for the first time. Using rapid amplification of cDNA ends (RACE) together with splicing the EST sequence from a haemocyte cDNA liary, we found that Hs-BTG1 contains a 525 bp open reading frame (ORF) encoding a 174 amino-acid polypeptide, a 306 bp 5' untranslated region (5' UTR), and a 571 bp 3' UTR with a Poly(A) tail as well as a transcription termination signal (AATAAA). Homologue searching against GenBank revealed that Hs-BTG1 was closest to Crassostrea gigas BTG1, sharing 50.57% of protein identities. Hs-BTG1 also shares some typical features of the BTG/TOB family, possessing two well-conserved A and B boxes. Clustering analysis of Hs-BTG1 and other known BTGs showed that Hs-BTG1 was also closely related to BTG1 of C. gigas from the inverteate BTG1 clade. Function prediction via homology modeling showed that both Hs-BTG1 and C. gigas BTG1 share a similar three-dimensional structure with Homo sapiens BTG1. Tissue-specific expression analysis of the Hs-BTG1 via real-time PCR showed that the transcripts were constitutively expressed, with the highest levels in the hepatopancreas and gills, and the lowest in both haemocyte and muscle tissue. Expression levels of Hs-BTG1 in hepatopancreas (2.03-fold), mantle (2.07-fold), kidney (2.2-fold) and haemocyte (2.5-fold) were enhanced by cadmium (Cd²⁺) stress, suggesting that Hs-BTG1 may have played a significant role in H. schlegelii adaptation to adverse environmental conditions.
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Affiliation(s)
- Kou Peng
- School of Life Sciences and Food Engineering, Nanchang University, Nanchang 330031, China
| | - Cheng-Yuan Wang
- School of Life Sciences and Food Engineering, Nanchang University, Nanchang 330031, China
| | - Jun-Hua Wang
- School of Life Sciences and Food Engineering, Nanchang University, Nanchang 330031, China
| | - Jun-Qing Sheng
- School of Life Sciences and Food Engineering, Nanchang University, Nanchang 330031, China
| | - Jian-Wu Shi
- School of Life Sciences and Food Engineering, Nanchang University, Nanchang 330031, China
| | - Jian Li
- School of Life Sciences and Food Engineering, Nanchang University, Nanchang 330031, China
| | - Yi-Jiang Hong
- School of Life Sciences and Food Engineering, Nanchang University, Nanchang 330031, China; Institute of Life Science, Nanchang University, Nanchang 330031, China.
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Benjamin JAM, Massé E. The iron-sensing aconitase B binds its own mRNA to prevent sRNA-induced mRNA cleavage. Nucleic Acids Res 2014; 42:10023-36. [PMID: 25092924 PMCID: PMC4150767 DOI: 10.1093/nar/gku649] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Aconitase is an iron–sulfur protein and a major enzyme of the TCA cycle that catalyzes the conversion of citrate to isocitrate under iron-rich conditions. In Escherichia coli, aconitase B (AcnB) is a typical moonlighting protein that can switch to its apo form (apo-AcnB) which favors binding its own mRNA 3′UTR and stabilize it when intracellular iron become scarce. The small regulatory RNA (sRNA) RyhB has previously been shown to promote RNase E-dependent degradation of acnB mRNA when it was expressed from an ectopic arabinose-dependent promoter, independently of intracellular iron levels. In marked contrast, we report here that expression of RyhB under low-iron conditions did not result in acnB mRNA degradation even when RyhB was bound to acnB ribosome binding site (RBS). Genetic and biochemical evidence suggested that, under low-iron conditions, apo-AcnB bound to acnB 3′UTR close to a RNase E cleavage site that is essential for RyhB-induced acnB mRNA degradation. Whereas RyhB can block acnB translation initiation, RNase E-dependent degradation of acnB was prevented by apo-AcnB binding close to the cleavage site. This previously uncharacterized regulation suggests an intricate post-transcriptional mechanism that represses protein expression while insuring mRNA stability.
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Affiliation(s)
- Julie-Anna M Benjamin
- Department of Biochemistry, RNA Group, University of Sherbrooke, 3201 Jean Mignault Street, Sherbrooke, Quebec J1E 4K8, Canada
| | - Eric Massé
- Department of Biochemistry, RNA Group, University of Sherbrooke, 3201 Jean Mignault Street, Sherbrooke, Quebec J1E 4K8, Canada
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