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Meng L, Lu Y, Wang X, Cheng C, Xue F, Xie L, Zhang Y, Sui W, Zhang M, Zhang Y, Zhang C. NPRC deletion attenuates cardiac fibrosis in diabetic mice by activating PKA/PKG and inhibiting TGF-β1/Smad pathways. SCIENCE ADVANCES 2023; 9:eadd4222. [PMID: 37531438 PMCID: PMC10396312 DOI: 10.1126/sciadv.add4222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 06/29/2023] [Indexed: 08/04/2023]
Abstract
Cardiac fibrosis plays a key role in the progression of diabetic cardiomyopathy (DCM). Previous studies demonstrated the cardioprotective effects of natriuretic peptides. However, the effects of natriuretic peptide receptor C (NPRC) on cardiac fibrosis in DCM remains unknown. Here, we observed that myocardial NPRC expression was increased in mice and patients with DCM. NPRC-/- diabetic mice showed alleviated cardiac fibrosis, as well as improved cardiac function and remodeling. NPRC knockdown in both cardiac fibroblasts and cardiomyocytes decreased collagen synthesis and proliferation of cardiac fibroblasts. RNA sequencing identified that NPRC deletion up-regulated the expression of TGF-β-induced factor homeobox 1 (TGIF1), which inhibited the phosphorylation of Smad2/3. Furthermore, TGIF1 up-regulation was mediated by the activation of cAMP/PKA and cGMP/PKG signaling induced by NPRC deletion. These findings suggest that NPRC deletion attenuated cardiac fibrosis and improved cardiac remodeling and function in diabetic mice, providing a promising approach to the treatment of diabetic cardiac fibrosis.
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Affiliation(s)
- Linlin Meng
- National Key Laboratory for Innovation and Transformation of Luobing Theory; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Yue Lu
- National Key Laboratory for Innovation and Transformation of Luobing Theory; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Xinlu Wang
- National Key Laboratory for Innovation and Transformation of Luobing Theory; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Cheng Cheng
- National Key Laboratory for Innovation and Transformation of Luobing Theory; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Fei Xue
- National Key Laboratory for Innovation and Transformation of Luobing Theory; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Lin Xie
- National Key Laboratory for Innovation and Transformation of Luobing Theory; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Yaoyuan Zhang
- National Key Laboratory for Innovation and Transformation of Luobing Theory; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Wenhai Sui
- National Key Laboratory for Innovation and Transformation of Luobing Theory; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | | | - Yun Zhang
- Corresponding author. (Y.Z.); (C.Z.)
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Hurwitz E, Parajuli P, Ozkan S, Prunier C, Nguyen TL, Campbell D, Friend C, Bryan AA, Lu TX, Smith SC, Razzaque MS, Xu K, Atfi A. Antagonism between Prdm16 and Smad4 specifies the trajectory and progression of pancreatic cancer. J Cell Biol 2023; 222:e202203036. [PMID: 36828547 PMCID: PMC9999015 DOI: 10.1083/jcb.202203036] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 11/28/2022] [Accepted: 01/23/2023] [Indexed: 02/26/2023] Open
Abstract
The transcription factor Prdm16 functions as a potent suppressor of transforming growth factor-beta (TGF-β) signaling, whose inactivation is deemed essential to the progression of pancreatic ductal adenocarcinoma (PDAC). Using the KrasG12D-based mouse model of human PDAC, we surprisingly found that ablating Prdm16 did not block but instead accelerated PDAC formation and progression, suggesting that Prdm16 might function as a tumor suppressor in this malignancy. Subsequent genetic experiments showed that ablating Prdm16 along with Smad4 resulted in a shift from a well-differentiated and confined neoplasm to a highly aggressive and metastatic disease, which was associated with a striking deviation in the trajectory of the premalignant lesions. Mechanistically, we found that Smad4 interacted with and recruited Prdm16 to repress its own expression, therefore pinpointing a model in which Prdm16 functions downstream of Smad4 to constrain the PDAC malignant phenotype. Collectively, these findings unveil an unprecedented antagonistic interaction between the tumor suppressors Smad4 and Prdm16 that functions to restrict PDAC progression and metastasis.
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Affiliation(s)
- Eric Hurwitz
- Department of Biochemistry and Molecular Biology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
| | - Parash Parajuli
- Department of Biochemistry and Molecular Biology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
| | - Seval Ozkan
- Cancer Institute, University of Mississippi Medical Centre, Jackson, MS, USA
| | - Celine Prunier
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France
| | - Thien Ly Nguyen
- Department of Biochemistry and Molecular Biology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
- Cancer Institute, University of Mississippi Medical Centre, Jackson, MS, USA
| | - Deanna Campbell
- Department of Biochemistry and Molecular Biology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
| | - Creighton Friend
- Department of Biochemistry and Molecular Biology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
| | - Allyn Austin Bryan
- Department of Biochemistry and Molecular Biology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
| | - Ting-Xuan Lu
- Department of Biochemistry and Molecular Biology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
| | | | | | - Keli Xu
- Cancer Institute, University of Mississippi Medical Centre, Jackson, MS, USA
| | - Azeddine Atfi
- Department of Biochemistry and Molecular Biology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France
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3
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He X, Nie Y, Zhou H, Hu R, Li Y, He T, Zhu J, Yang Y, Liu M. Structural Insight into the Binding of TGIF1 to SIN3A PAH2 Domain through a C-Terminal Amphipathic Helix. Int J Mol Sci 2021; 22:ijms222312631. [PMID: 34884456 PMCID: PMC8657803 DOI: 10.3390/ijms222312631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/19/2021] [Accepted: 11/20/2021] [Indexed: 02/03/2023] Open
Abstract
TGIF1 is a transcriptional repressor playing crucial roles in human development and function and is associated with holoprosencephaly and various cancers. TGIF1-directed transcriptional repression of specific genes depends on the recruitment of corepressor SIN3A. However, to date, the exact region of TGIF1 binding to SIN3A was not clear, and the structural basis for the binding was unknown. Here, we demonstrate that TGIF1 utilizes a C-terminal domain (termed as SIN3A-interacting domain, SID) to bind with SIN3A PAH2. The TGIF1 SID adopts a disordered structure at the apo state but forms an amphipathic helix binding into the hydrophobic cleft of SIN3A PAH2 through the nonpolar side at the holo state. Residues F379, L382 and V383 of TGIF1 buried in the hydrophobic core of the complex are critical for the binding. Moreover, homodimerization of TGIF1 through the SID and key residues of F379, L382 and V383 was evidenced, which suggests a dual role of TGIF1 SID and a correlation between dimerization and SIN3A-PAH2 binding. This study provides a structural insight into the binding of TGIF1 with SIN3A, improves the knowledge of the structure–function relationship of TGIF1 and its homologs and will help in recognizing an undiscovered SIN3A-PAH2 binder and developing a peptide inhibitor for cancer treatment.
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Affiliation(s)
- Xiaoling He
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
| | - Yao Nie
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Heng Zhou
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rui Hu
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ying Li
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ting He
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
| | - Jiang Zhu
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yunhuang Yang
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Maili Liu
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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4
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Lang YD, Jou YS. PSPC1 is a new contextual determinant of aberrant subcellular translocation of oncogenes in tumor progression. J Biomed Sci 2021; 28:57. [PMID: 34340703 PMCID: PMC8327449 DOI: 10.1186/s12929-021-00753-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 07/24/2021] [Indexed: 12/30/2022] Open
Abstract
Dysregulation of nucleocytoplasmic shuttling is commonly observed in cancers and emerging as a cancer hallmark for the development of anticancer therapeutic strategies. Despite its severe adverse effects, selinexor, a selective first-in-class inhibitor of the common nuclear export receptor XPO1, was developed to target nucleocytoplasmic protein shuttling and received accelerated FDA approval in 2019 in combination with dexamethasone as a fifth-line therapeutic option for adults with relapsed refractory multiple myeloma (RRMM). To explore innovative targets in nucleocytoplasmic shuttling, we propose that the aberrant contextual determinants of nucleocytoplasmic shuttling, such as PSPC1 (Paraspeckle component 1), TGIF1 (TGF-β Induced Factor Homeobox 1), NPM1 (Nucleophosmin), Mortalin and EBP50, that modulate shuttling (or cargo) proteins with opposite tumorigenic functions in different subcellular locations could be theranostic targets for developing anticancer strategies. For instance, PSPC1 was recently shown to be the contextual determinant of the TGF-β prometastatic switch and PTK6/β-catenin reciprocal oncogenic nucleocytoplasmic shuttling during hepatocellular carcinoma (HCC) progression. The innovative nucleocytoplasmic shuttling inhibitor PSPC1 C-terminal 131 polypeptide (PSPC1-CT131), which was developed to target both the shuttling determinant PSPC1 and the shuttling protein PTK6, maintained their tumor-suppressive characteristics and exhibited synergistic effects on tumor suppression in HCC cells and mouse models. In summary, targeting the contextual determinants of nucleocytoplasmic shuttling with cargo proteins having opposite tumorigenic functions in different subcellular locations could be an innovative strategy for developing new therapeutic biomarkers and agents to improve cancer therapy.
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Affiliation(s)
- Yaw-Dong Lang
- Institute of Biomedical Sciences, Academia Sinica, 11529, Taipei, Taiwan
| | - Yuh-Shan Jou
- Institute of Biomedical Sciences, Academia Sinica, 11529, Taipei, Taiwan.
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5
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Razzaque MS, Atfi A. TGIF1-Twist1 axis in pancreatic ductal adenocarcinoma. Comput Struct Biotechnol J 2020; 18:2568-2572. [PMID: 33005315 PMCID: PMC7520386 DOI: 10.1016/j.csbj.2020.09.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/11/2020] [Accepted: 09/11/2020] [Indexed: 12/18/2022] Open
Abstract
TG-interacting factor 1 (TGIF1) exerts inhibitory effects on transforming growth factor-beta (TGF-β) signaling by suppressing Smad signaling pathway at multiple levels. TGIF1 activity is important for normal embryogenesis and organogenesis, yet its dysregulation can culminate in tumorigenesis. For instance, increased expression of TGIF1 correlates with poor prognosis in triple-negative breast cancer patients, and enforced expression of TGIF1 facilitates Wnt-driven mammary tumorigenesis, suggesting that TGIF1 might function as an oncoprotein. Quite surprisingly, TGIF1 has recently been shown to function as a tumor suppressor in pancreatic ductal adenocarcinoma (PDAC), possibly owing to its ability to antagonize the pro-malignant transcription factor Twist1. In this article, we will briefly elaborate on the biological and clinical significance of the unique tumor-suppressive function of TGIF1 and its functional interaction with Twist1 in the context of PDAC pathogenesis and progression.
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Affiliation(s)
- Mohammed S Razzaque
- Department of Pathology, Lake Erie College of Osteopathic Medicine, Erie, PA, USA
| | - Azeddine Atfi
- Department of Pathology and Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
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6
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El-Asmi F, Chelbi-Alix MK. [PML isoforms and TGF-β response]. Med Sci (Paris) 2020; 36:50-56. [PMID: 32014098 DOI: 10.1051/medsci/2019269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
PML/TRIM19 is the organizer of PML nuclear bodies (NB), a multiprotein complex associated to the nuclear matrix, which recruit a large number of proteins involved in various cellular processes. Alternative splicing from a single PML gene generates 6 nuclear PML isoforms (PMLI to PMLVI) and one cytoplasmic isoform, PMLVII. Murine PML-null primary cells are resistant to TGF-β-induced apoptosis. Cytoplasmic PML is an essential activator of TGF-β signaling by increasing the phosphorylation of transcription factors SMAD2/3 while nuclear PML plays a role in TGF-β-induced caspase 8 activation and apoptosis. TGF-β targets nuclear PML by inducing its conjugation to SUMO. In the nucleus, PML is mainly expressed in the nucleoplasm with a small fraction in the nuclear matrix. In response to TGF-β, PML and caspase 8 shift to the nuclear matrix, where both PML and caspase 8 colocalise within PML NBs. Here, we review the implication of cytoplasmic and nuclear PML isoforms in TGF-β response.
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Affiliation(s)
- Faten El-Asmi
- Inserm UMR-S 1124, Université Paris Descartes, 45 rue des Saints Pères, 75006 Paris, France
| | - Mounira K Chelbi-Alix
- Inserm UMR-S 1124, Université Paris Descartes, 45 rue des Saints Pères, 75006 Paris, France
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7
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The Use of Genetically Engineered Mouse Models for Studying the Function of Mutated Driver Genes in Pancreatic Cancer. J Clin Med 2019; 8:jcm8091369. [PMID: 31480737 PMCID: PMC6780401 DOI: 10.3390/jcm8091369] [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: 07/30/2019] [Revised: 08/26/2019] [Accepted: 08/27/2019] [Indexed: 02/06/2023] Open
Abstract
Pancreatic cancer is often treatment-resistant, with the emerging standard of care, gemcitabine, affording only a few months of incrementally-deteriorating survival. Reflecting on the history of failed clinical trials, genetically engineered mouse models (GEMMs) in oncology research provides the inspiration to discover new treatments for pancreatic cancer that come from better knowledge of pathogenesis mechanisms, not only of the derangements in and consequently acquired capabilities of the cancer cells, but also in the aberrant microenvironment that becomes established to support, sustain, and enhance neoplastic progression. On the other hand, the existing mutational profile of pancreatic cancer guides our understanding of the disease, but leaves many important questions of pancreatic cancer biology unanswered. Over the past decade, a series of transgenic and gene knockout mouse modes have been produced that develop pancreatic cancers with features reflective of metastatic pancreatic ductal adenocarcinoma (PDAC) in humans. Animal models of PDAC are likely to be essential to understanding the genetics and biology of the disease and may provide the foundation for advances in early diagnosis and treatment.
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8
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Parajuli P, Singh P, Wang Z, Li L, Eragamreddi S, Ozkan S, Ferrigno O, Prunier C, Razzaque MS, Xu K, Atfi A. TGIF1 functions as a tumor suppressor in pancreatic ductal adenocarcinoma. EMBO J 2019; 38:e101067. [PMID: 31268604 PMCID: PMC6601038 DOI: 10.15252/embj.2018101067] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 04/11/2019] [Accepted: 04/23/2019] [Indexed: 02/05/2023] Open
Abstract
A prominent function of TGIF1 is suppression of transforming growth factor beta (TGF-β) signaling, whose inactivation is deemed instrumental to the progression of pancreatic ductal adenocarcinoma (PDAC), as exemplified by the frequent loss of the tumor suppressor gene SMAD4 in this malignancy. Surprisingly, we found that genetic inactivation of Tgif1 in the context of oncogenic Kras, KrasG12D , culminated in the development of highly aggressive and metastatic PDAC despite de-repressing TGF-β signaling. Mechanistic experiments show that TGIF1 associates with Twist1 and inhibits Twist1 expression and activity, and this function is suppressed in the vast majority of human PDACs by KrasG12D /MAPK-mediated TGIF1 phosphorylation. Ablating Twist1 in KrasG12D ;Tgif1KO mice completely blunted PDAC formation, providing the proof-of-principle that TGIF1 restrains KrasG12D -driven PDAC through its ability to antagonize Twist1. Collectively, these findings pinpoint TGIF1 as a potential tumor suppressor in PDAC and further suggest that sustained activation of TGF-β signaling might act to accelerate PDAC progression rather than to suppress its initiation.
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Affiliation(s)
- Parash Parajuli
- Cellular and Molecular Pathogenesis DivisionDepartment of Pathology and Massey Cancer CenterVirginia Commonwealth UniversityRichmondVAUSA
| | - Purba Singh
- Cancer InstituteUniversity of Mississippi Medical CenterJacksonMSUSA
| | - Zhe Wang
- Cancer InstituteUniversity of Mississippi Medical CenterJacksonMSUSA
| | - Lianna Li
- Cancer InstituteUniversity of Mississippi Medical CenterJacksonMSUSA
| | | | - Seval Ozkan
- Cancer InstituteUniversity of Mississippi Medical CenterJacksonMSUSA
| | - Olivier Ferrigno
- Centre de Recherche Saint‐Antoine, CRSAInsermSorbonne UniversitésParisFrance
| | - Celine Prunier
- Centre de Recherche Saint‐Antoine, CRSAInsermSorbonne UniversitésParisFrance
| | | | - Keli Xu
- Cancer InstituteUniversity of Mississippi Medical CenterJacksonMSUSA
| | - Azeddine Atfi
- Cellular and Molecular Pathogenesis DivisionDepartment of Pathology and Massey Cancer CenterVirginia Commonwealth UniversityRichmondVAUSA
- Centre de Recherche Saint‐Antoine, CRSAInsermSorbonne UniversitésParisFrance
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9
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Shah A, Melhuish TA, Fox TE, Frierson HF, Wotton D. TGIF transcription factors repress acetyl CoA metabolic gene expression and promote intestinal tumor growth. Genes Dev 2019; 33:388-402. [PMID: 30808659 PMCID: PMC6446543 DOI: 10.1101/gad.320127.118] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 01/24/2019] [Indexed: 02/06/2023]
Abstract
In this study, Shah et al. show that Tgifs, which repress gene expression by binding directly to DNA or interacting with transforming growth factor β (TGFβ)-responsive SMADs, promote adenoma growth in the context of mutant Apc (adenomatous polyposis coli). Their findings suggest that Tgifs play an important role in regulating basic energy metabolism in normal cells and that this function of Tgifs is amplified in some cancers. Tgif1 (thymine–guanine-interacting factor 1) and Tgif2 repress gene expression by binding directly to DNA or interacting with transforming growth factor (TGF) β-responsive SMADs. Tgifs are essential for embryogenesis and may function in tumor progression. By analyzing both gain and loss of Tgif function in a well-established mouse model of intestinal cancer, we show that Tgifs promote adenoma growth in the context of mutant Apc (adenomatous polyposis coli). Despite the tumor-suppressive role of TGFβ signaling, transcriptome profiling of colon tumors suggests minimal effect of Tgifs on the TGFβ pathway. Instead, it appears that Tgifs, which are up-regulated in Apc mutant colon tumors, contribute to reprogramming metabolic gene expression. Integrating gene expression data from colon tumors with other gene expression and chromatin-binding data identifies a set of direct Tgif target genes encoding proteins involved in acetyl CoA and pyruvate metabolism. Analysis of both tumor and nontumor tissues indicates that these genes are targets of Tgif repression in multiple settings, suggesting that this is a core Tgif function. We propose that Tgifs play an important role in regulating basic energy metabolism in normal cells, and that this function of Tgifs is amplified in some cancers.
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Affiliation(s)
- Anant Shah
- Department of Biochemistry and Molecular Genetics, Center for Cell Signaling, University of Virginia, Charlottesville, Virginia 22908, USA
| | - Tiffany A Melhuish
- Department of Biochemistry and Molecular Genetics, Center for Cell Signaling, University of Virginia, Charlottesville, Virginia 22908, USA
| | - Todd E Fox
- Department of Pharmacology, University of Virginia, Charlottesville, Virginia 22908, USA
| | - Henry F Frierson
- Department of Pathology, University of Virginia, Charlottesville, Virginia 22908, USA
| | - David Wotton
- Department of Biochemistry and Molecular Genetics, Center for Cell Signaling, University of Virginia, Charlottesville, Virginia 22908, USA
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10
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Wu D, Huang D, Li LL, Ni P, Li XX, Wang B, Han YN, Shao XQ, Zhao D, Chu WF, Li BY. TGF-β1-PML SUMOylation-peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 (Pin1) form a positive feedback loop to regulate cardiac fibrosis. J Cell Physiol 2018; 234:6263-6273. [PMID: 30246389 DOI: 10.1002/jcp.27357] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 08/17/2018] [Indexed: 11/11/2022]
Abstract
Transforming growth factor-β (TGF-β) signaling pathway is involved in fibrosis in most, if not all forms of cardiac diseases. Here, we evaluate a positive feedback signaling the loop of TGF-β1/promyelocytic leukemia (PML) SUMOylation/Pin1 promoting the cardiac fibrosis. To test this hypothesis, the mice underwent transverse aortic constriction (3 weeks) were developed and the morphological evidence showed obvious interstitial fibrosis with TGF-β1, Pin1 upregulation, and increase in PML SUMOylation. In neonatal mouse cardiac fibroblasts (NMCFs), we found that exogenous TGF-β1 induced the upregulation of TGF-β1 itself in a time- and dose-dependent manner, and also triggered the PML SUMOylation and the formation of PML nuclear bodies (PML-NBs), and consequently recruited Pin1 into nuclear to colocalize with PML. Pharmacological inhibition of TGF-β signal or Pin1 with LY364947 (3 μM) or Juglone (3 μM), the TGF-β1-induced PML SUMOylation was reduced significantly with downregulation of the messenger RNA and protein for TGF-β1 and Pin1. To verify the cellular function of PML by means of gain- or loss-of-function, the positive feedback signaling loop was enhanced or declined, meanwhile, TGF-β-Smad signaling pathway was activated or weakened, respectively. In summary, we uncovered a novel reciprocal loop of TGF-β1/PML SUMOylation/Pin1 leading to myocardial fibrosis.
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Affiliation(s)
- Di Wu
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Di Huang
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Liang-Liang Li
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Ping Ni
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Xiu-Xian Li
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Bing Wang
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yan-Na Han
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Xiao-Qi Shao
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Dan Zhao
- Departments of Clinical Pharmacy and Cardiology, Key Laboratories of Education Ministry for Myocardial Ischemia Mechanism and Treatment, The 2nd Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Wen-Feng Chu
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
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11
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Functions and dys-functions of promyelocytic leukemia protein PML. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2018. [DOI: 10.1007/s12210-018-0714-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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12
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Wotton D, Taniguchi K. Functions of TGIF homeodomain proteins and their roles in normal brain development and holoprosencephaly. AMERICAN JOURNAL OF MEDICAL GENETICS PART C-SEMINARS IN MEDICAL GENETICS 2018; 178:128-139. [PMID: 29749689 DOI: 10.1002/ajmg.c.31612] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 03/30/2018] [Accepted: 04/02/2018] [Indexed: 01/08/2023]
Abstract
Holoprosencephaly (HPE) is a frequent human forebrain developmental disorder with both genetic and environmental causes. Multiple loci have been associated with HPE in humans, and potential causative genes at 14 of these loci have been identified. Although TGIF1 (originally TGIF, for Thymine Guanine-Interacting Factor) is among the most frequently screened genes in HPE patients, an understanding of how mutations in this gene contribute to the pathogenesis of HPE has remained elusive. However, mouse models based on loss of function of Tgif1, and the related Tgif2 gene, have shed some light on how human TGIF1 variants might cause HPE. Functional analyses of TGIF proteins and of TGIF1 single nucleotide variants from HPE patients, combined with analysis of forebrain development in mouse embryos lacking both Tgif1 and Tgif2, suggest that TGIFs regulate the transforming growth factor ß/Nodal signaling pathway and sonic hedgehog (SHH) signaling independently. Although, some developmental processes that are regulated by TGIFs may be Nodal-dependent, it appears that the forebrain patterning defects and HPE in Tgif mutant mouse embryos is primarily due to altered signaling via the Shh pathway.
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Affiliation(s)
- David Wotton
- Department of Biochemistry and Molecular Genetics, Center for Cell Signaling, University of Virginia, Charlottesville, Virginia
| | - Kenichiro Taniguchi
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, Michigan
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13
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Akbari A, Agah S, Heidari M, Mobini GR, Faghihloo E, Sarveazad A, Mirzaei A. Homeodomain Protein Transforming Growth Factor Beta-Induced Factor 2 Like, X-Linked Function in Colon Adenocarcinoma Cells. Asian Pac J Cancer Prev 2017:2101-2108. [PMID: 28843229 PMCID: PMC5697467 DOI: 10.22034/apjcp.2017.18.8.2101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Background: TGIF2LX (transforming growth factor beta-induced factor 2 like, X-linked) is a homeodomain (HD) protein that has been implicated in the negative regulation of cell signaling pathways. The aim of this study was to investigate the possible functions of TGIF2LX in colon adenocarcinoma cells. Methods: The human SW48 cell line was transfected with cDNA for the wild-type TGIF2LX gene and gene/protein over-expression was confirmed by microscopic analysis, real time RT-PCR and Western blotting techniques. In vitro cell proliferation was evaluated by MTT and BrdU assays. After developing a colon tumor model in nude mice, immunohistochemical (IHC) staining of tumor tissue was carried out for Ki-67 (proliferation) and CD34 (angiogenesis) markers. To predict potential protein partners of TGIF2LX, in-silico analysis was also conducted. Results: Obtained results showed over-expression of TGIF2LX as a potential transcription factor could inhibit either proliferation or angiogenesis (P<0.05) in colon tumors. In-silico results predicted interaction of TGIF2LX with other proteins considered important for cellular development. Conclusions: Our findings provided evidence of molecular mechanisms by which TGIF2LX could act as a tumor suppressor in colon adenocarcinoma cells. Thus, this gene may potentially be a promising option for colon cancer gene-based therapeutic strategies.
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Affiliation(s)
- Abolfazl Akbari
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran.
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14
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Wang JL, Qi Z, Li YH, Zhao HM, Chen YG, Fu W. TGFβ induced factor homeobox 1 promotes colorectal cancer development through activating Wnt/β-catenin signaling. Oncotarget 2017; 8:70214-70225. [PMID: 29050273 PMCID: PMC5642548 DOI: 10.18632/oncotarget.19603] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 06/20/2017] [Indexed: 12/21/2022] Open
Abstract
Colorectal cancer (CRC) is one of the most common cancers, but the mechanisms underlying its initiation and progression are largely unknown. TGIF1 (TGFB induced factor homeobox 1) is a transcriptional corepressor that belongs to the three-amino acid loop extension (TALE) superclass of atypical homeodomains. It has been reported that TGIF1 is highly expressed in mammary cancer and non-small cell lung cancer and can enhance tumor progression. However, the role of TGIF1 in colorectal cancer remains unknown. Here, we report that TGIF1 is significantly upregulated in colorectal cancers, and its high expression predicts poor prognosis. Overexpression of TGIF1 markedly promotes the proliferation of colorectal cancer cells both in vivo and in vitro. In addition, TGIF1 activates Wnt/β-catenin signaling, and the homeodomain is indispensable for Wnt activation and β-catenin interaction. Taken together, our results suggest that TGIF1 is a novel colorectal tumor promoter and indicate that TGIF1 enhances colorectal cancer tumorigenesis through activating Wnt signaling.
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Affiliation(s)
- Ji-Lian Wang
- Department of General Surgery, Peking University Third Hospital, Beijing 100191, China
| | - Zhen Qi
- The State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Ye-Hua Li
- The State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Hong-Mei Zhao
- Department of General Surgery, Peking University Third Hospital, Beijing 100191, China
| | - Ye-Guang Chen
- The State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Wei Fu
- Department of General Surgery, Peking University Third Hospital, Beijing 100191, China
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15
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Tgif1 and Tgif2 Repress Expression of the RabGAP Evi5l. Mol Cell Biol 2017; 37:MCB.00527-16. [PMID: 27956704 DOI: 10.1128/mcb.00527-16] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 12/02/2016] [Indexed: 11/20/2022] Open
Abstract
Mouse embryos conditionally lacking Tgif1 and Tgif2 have holoprosencephaly and defects in left-right asymmetry. To identify pathways affected by loss of Tgif function during embryogenesis, we performed transcriptome profiling on whole mouse embryos. Among the genes with altered expression in embryos lacking Tgifs were a number with links to cilium function. One of these, Evi5l, encodes a RabGAP that is known to block the formation of cilia when overexpressed. Evi5l expression is increased in Tgif1; Tgif2-null embryos and in double-null mouse embryo fibroblasts (MEFs). Knockdown of Tgifs in a human retinal pigment epithelial cell line also increased EVI5L expression. We show that TGIF1 binds to a conserved consensus TGIF site 5' of the human and mouse Evi5l genes and represses Evi5l expression. In primary MEFs lacking both Tgifs, the number of cells with primary cilia was significantly decreased, and we observed a reduction in the transcriptional response to Shh pathway activation. Reducing Evi5l expression in MEFs lacking Tgifs resulted in a partial restoration of cilium numbers and in the transcriptional response to activation of the Shh pathway. In summary, this work shows that Tgifs regulate ciliogenesis and suggests that Evi5l mediates at least part of this effect.
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16
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Barbollat-Boutrand L, Joly-Tonetti N, Dos Santos M, Metral E, Boher A, Masse I, Berthier-Vergnes O, Bertolino P, Damour O, Lamartine J. MicroRNA-23b-3p regulates human keratinocyte differentiation through repression of TGIF1 and activation of the TGF-ß-SMAD2 signalling pathway. Exp Dermatol 2016; 26:51-57. [DOI: 10.1111/exd.13119] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Laetitia Barbollat-Boutrand
- Université de Lyon; Lyon France
- Université Lyon 1; Lyon France
- CNRS; UMR5534; Centre de Génétique et de Physiologie Moléculaires et Cellulaires; Villeurbanne France
| | - Nicolas Joly-Tonetti
- Université de Lyon; Lyon France
- Université Lyon 1; Lyon France
- CNRS; UMR5534; Centre de Génétique et de Physiologie Moléculaires et Cellulaires; Villeurbanne France
| | | | - Elodie Metral
- Banque de Tissus et Cellules; Hospices Civiles de Lyon; Lyon France
| | | | - Ingrid Masse
- Université de Lyon; Lyon France
- Université Lyon 1; Lyon France
- CNRS; UMR5534; Centre de Génétique et de Physiologie Moléculaires et Cellulaires; Villeurbanne France
| | - Odile Berthier-Vergnes
- Université de Lyon; Lyon France
- Université Lyon 1; Lyon France
- CNRS; UMR5534; Centre de Génétique et de Physiologie Moléculaires et Cellulaires; Villeurbanne France
| | | | - Odile Damour
- Banque de Tissus et Cellules; Hospices Civiles de Lyon; Lyon France
| | - Jérôme Lamartine
- Université de Lyon; Lyon France
- Université Lyon 1; Lyon France
- CNRS; UMR5534; Centre de Génétique et de Physiologie Moléculaires et Cellulaires; Villeurbanne France
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17
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Kuribayashi H, Tsuhako A, Kikuchi M, Yoshida N, Koso H, Watanabe S. Role of transcription factor Tgif2 in photoreceptor differentiation in the mouse retina. Exp Eye Res 2016; 152:34-42. [DOI: 10.1016/j.exer.2016.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 09/09/2016] [Accepted: 09/13/2016] [Indexed: 10/21/2022]
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Abstract
In cells responding to extracellular polypeptide ligands, regulatory mechanisms at the level of cell surface receptors are increasingly seen to define the nature of the ligand-induced signaling responses. Processes that govern the levels of receptors at the plasma membrane, including posttranslational modifications, are crucial to ensure receptor function and specify the downstream signals. Indeed, extracellular posttranslational modifications of the receptors help define stability and ligand binding, while intracellular modifications mediate interactions with signaling mediators and accessory proteins that help define the nature of the signaling response. The use of various molecular biology and biochemistry techniques, based on chemical crosslinking, e.g., biotin or radioactive labeling, immunofluorescence to label membrane receptors and flow cytometry, allows for quantification of changes of cell surface receptor presentation. Here, we discuss recent progress in our understanding of the regulation of TGF-β receptors, i.e., the type I (TβRI) and type II (TβRII) TGF-β receptors, and describe basic methods to identify and quantify TGF-β cell surface receptors.
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Affiliation(s)
- Erine H Budi
- Department of Cell and Tissue Biology, Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Programs in Cell Biology, and Developmental and Stem Cell Biology, University of California, San Francisco, CA, USA
| | - Jian Xu
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry of USC, University of Southern California, Los Angeles, CA, USA
| | - Rik Derynck
- Department of Cell and Tissue Biology, Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Programs in Cell Biology, and Developmental and Stem Cell Biology, University of California, San Francisco, CA, USA.
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19
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Razzaque MS, Atfi A. TGIF function in oncogenic Wnt signaling. Biochim Biophys Acta Rev Cancer 2015; 1865:101-4. [PMID: 26522669 DOI: 10.1016/j.bbcan.2015.10.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 10/26/2015] [Accepted: 10/28/2015] [Indexed: 01/17/2023]
Abstract
Transforming growth-interacting factor (TGIF) has been implicated in the pathogenesis of many types of human cancer, but the underlying mechanisms remained mostly enigmatic. Our recent study has revealed that TGIF functions as a mediator of oncogenic Wnt/β-catenin signaling. We found that TGIF can interact with and sequesters Axin1 and Axin2 into the nucleus, thereby culminating in disassembly of the β-catenin-destruction complex and attendant accumulation of β-catenin in the nucleus, where it activates expression of Wnt target genes, including TGIF itself. We have provided proof-of-concept evidences that high levels of TGIF expression correlate with poor prognosis in patients with triple negative breast cancer (TNBC), and that TGIF empowers Wnt-driven mammary tumorigenesis in vivo. Here, we will briefly summarize how TGIF influences Wnt signaling to promote tumorigenesis.
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Affiliation(s)
- Mohammed S Razzaque
- Department of Applied Oral Sciences, The Forsyth Institute, Harvard School of Dental Medicine Affiliate, 245 First Street, Cambridge, MA 02142, USA; Department of Pathology, Saba University School of Medicine, Church Street, Saba, Dutch Caribbean.
| | - Azeddine Atfi
- Cancer Institute and Department of Biochemistry, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216, USA; INSERM UMRS 938, Laboratory of Cell Signaling and Carcinogenesis, Hôpital Saint-Antoine, 34 rue Crozatier, 75012 Paris, France
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20
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Guan D, Kao HY. The function, regulation and therapeutic implications of the tumor suppressor protein, PML. Cell Biosci 2015; 5:60. [PMID: 26539288 PMCID: PMC4632682 DOI: 10.1186/s13578-015-0051-9] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 10/28/2015] [Indexed: 12/21/2022] Open
Abstract
The tumor suppressor protein, promyelocytic leukemia protein (PML), was originally identified in acute promyelocytic leukemia due to a chromosomal translocation between chromosomes 15 and 17. PML is the core component of subnuclear structures called PML nuclear bodies (PML-NBs), which are disrupted in acute promyelocytic leukemia cells. PML plays important roles in cell cycle regulation, survival and apoptosis, and inactivation or down-regulation of PML is frequently found in cancer cells. More than 120 proteins have been experimentally identified to physically associate with PML, and most of them either transiently or constitutively co-localize with PML-NBs. These interactions are associated with many cellular processes, including cell cycle arrest, apoptosis, senescence, transcriptional regulation, DNA repair and intermediary metabolism. Importantly, PML inactivation in cancer cells can occur at the transcriptional-, translational- or post-translational- levels. However, only a few somatic mutations have been found in cancer cells. A better understanding of its regulation and its role in tumor suppression will provide potential therapeutic opportunities. In this review, we discuss the role of PML in multiple tumor suppression pathways and summarize the players and stimuli that control PML protein expression or subcellular distribution.
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Affiliation(s)
- Dongyin Guan
- Department of Biochemistry, School of Medicine, Case Western Reserve University, and Comprehensive Cancer Center of Case Western Reserve University, Cleveland, 10900 Euclid Avenue, Cleveland, OH 44106 USA
| | - Hung-Ying Kao
- Department of Biochemistry, School of Medicine, Case Western Reserve University, and Comprehensive Cancer Center of Case Western Reserve University, Cleveland, 10900 Euclid Avenue, Cleveland, OH 44106 USA
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21
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Wang Y, Wang H, Gao H, Xu B, Zhai W, Li J, Zhang C. Elevated expression of TGIF is involved in lung carcinogenesis. Tumour Biol 2015; 36:9223-31. [PMID: 26091794 DOI: 10.1007/s13277-015-3615-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 05/26/2015] [Indexed: 02/06/2023] Open
Abstract
The purpose of this study was to explore the expression of TG-interacting factor (TGIF) in lung carcinogenesis. Malignant transformation of human bronchial epithelial (16HBE) cell was established by benzo(a)pyrene (BaP) treatment. Soft agar assay and tumor formation assay in nude mice were applied. Tumorigenesis experiment in vivo was done by BaP treatment. Western blotting, immunohistochemistry, and quantitative polymerase chain reaction were used to detect TGIF expression. We observed a higher level of TGIF messenger RNA (mRNA) in lung cancer tissues than that in paracancerous tissues. We observed significantly higher levels of TGIF mRNA and protein in A549 and H1299 cell lines than that in 16HBE cell. Increased expressions of TGIF protein and mRNA were observed in 16HBE cells induced by BaP treatment as compared to those in solvent control group. We observed significantly higher levels of TGIF mRNA and protein in 16HBE-BaP cells than that in 16HBE-control cells. We observed significantly higher levels of TGIF mRNA and protein in mice lung tissues treated with BaP than that in control group. Our results suggested that elevated expression of TGIF was involved in lung carcinogenesis.
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Affiliation(s)
- Yadong Wang
- Department of Toxicology, Henan Center for Disease Control and Prevention, Zhengzhou, 450016, China.
| | - Haiyu Wang
- Department of Toxicology, Henan Center for Disease Control and Prevention, Zhengzhou, 450016, China
| | - Huiyan Gao
- Department of Toxicology, Henan Center for Disease Control and Prevention, Zhengzhou, 450016, China
| | - Bing Xu
- Department of Toxicology, Henan Center for Disease Control and Prevention, Zhengzhou, 450016, China
| | - Wenlong Zhai
- Department of General Surgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Jiangmin Li
- Department of Toxicology, Henan Center for Disease Control and Prevention, Zhengzhou, 450016, China
| | - Congke Zhang
- Department of Toxicology, Henan Center for Disease Control and Prevention, Zhengzhou, 450016, China
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22
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Zhang MZ, Ferrigno O, Wang Z, Ohnishi M, Prunier C, Levy L, Razzaque M, Horne WC, Romero D, Tzivion G, Colland F, Baron R, Atfi A. TGIF governs a feed-forward network that empowers Wnt signaling to drive mammary tumorigenesis. Cancer Cell 2015; 27:547-60. [PMID: 25873176 PMCID: PMC4398914 DOI: 10.1016/j.ccell.2015.03.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 12/10/2014] [Accepted: 03/02/2015] [Indexed: 12/11/2022]
Abstract
Many types of human cancers having hyperactivated Wnt signaling display no causative alterations in known effectors of this pathway. Here, we report a function of TGIF in Wnt signaling. TGIF associates with and diverts Axin1 and Axin2 from the β-catenin destruction complex, therefore allowing β-catenin accrual. Intriguingly, activation of Wnt signaling induces the expression of TGIF, which unveils a feed-forward loop that ensures effective integration of Wnt signaling. In triple-negative breast cancers (TNBC), elevated levels of TGIF correlate with high Wnt signaling and poor survival of patients. Moreover, genetic experiments revealed that Tgif1 ablation impeded mammary tumor development in MMTV-Wnt1 mice, further underscoring a requirement of TGIF for oncogenic Wnt signaling.
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Affiliation(s)
- Ming-Zhu Zhang
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA; Department of Orthopaedics, Tongji University School of Medicine, Shanghai 200065, China
| | - Olivier Ferrigno
- Laboratory of Cell Signaling and Carcinogenesis, INSERM UMRS938, 184 Rue du Faubourg St-Antoine, 75571 Paris, France
| | - Zhe Wang
- Department of Biochemistry, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216, USA
| | - Mutsuko Ohnishi
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
| | - Céline Prunier
- Laboratory of Cell Signaling and Carcinogenesis, INSERM UMRS938, 184 Rue du Faubourg St-Antoine, 75571 Paris, France
| | - Laurence Levy
- Laboratory of Cell Signaling and Carcinogenesis, INSERM UMRS938, 184 Rue du Faubourg St-Antoine, 75571 Paris, France
| | - Mohammed Razzaque
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
| | - Williams C Horne
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
| | - Damian Romero
- Department of Biochemistry, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216, USA
| | - Guri Tzivion
- Department of Biochemistry, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216, USA
| | | | - Roland Baron
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
| | - Azeddine Atfi
- Laboratory of Cell Signaling and Carcinogenesis, INSERM UMRS938, 184 Rue du Faubourg St-Antoine, 75571 Paris, France; Department of Biochemistry, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216, USA.
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23
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Prunier C, Zhang MZ, Kumar S, Levy L, Ferrigno O, Tzivion G, Atfi A. Disruption of the PHRF1 Tumor Suppressor Network by PML-RARα Drives Acute Promyelocytic Leukemia Pathogenesis. Cell Rep 2015; 10:883-890. [PMID: 25683711 DOI: 10.1016/j.celrep.2015.01.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 11/24/2014] [Accepted: 01/09/2015] [Indexed: 12/20/2022] Open
Abstract
PHRF1 functions as an essential component of the TGF-β tumor suppressor pathway by triggering degradation of the homeodomain repressor factor TGIF. This leads to redistribution of cPML into the cytoplasm, where it coordinates phosphorylation and activation of Smad2 by the TGF-β receptor. In acute promyelocytic leukemia (APL), acquisition of PML-RARα is known to impede critical aspects of TGF-β signaling, including myeloid differentiation. Although these defects are thought to rely on suppression of cPML activity, the mechanisms underlying this phenomenon remain enigmatic. Here, we find that an abnormal function of PML-RARα is to interfere with TGIF breakdown, presumably by competing with PHRF1 for binding to TGIF, culminating in cPML sequestration and inactivation. Enforcing PHRF1 activity is sufficient to restore TGF-β cytostatic signaling in human blasts and suppress APL formation in a mouse model of APL, providing proof-of-concept data that suppression of PHRF1 activity by PML-RARα represents a critical determinant in APL pathogenesis.
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Affiliation(s)
- Céline Prunier
- Laboratory of Cell Signaling and Carcinogenesis, INSERM UMRS938, 184 Rue du Faubourg St-Antoine, 75571 Paris, France
| | - Ming-Zhu Zhang
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
| | - Santosh Kumar
- Department of Biochemistry, University of Mississippi Medical Center, 2500 N. State Street, Jackson, MS 39216, USA
| | - Laurence Levy
- Laboratory of Cell Signaling and Carcinogenesis, INSERM UMRS938, 184 Rue du Faubourg St-Antoine, 75571 Paris, France
| | - Olivier Ferrigno
- Laboratory of Cell Signaling and Carcinogenesis, INSERM UMRS938, 184 Rue du Faubourg St-Antoine, 75571 Paris, France
| | - Guri Tzivion
- Department of Biochemistry, University of Mississippi Medical Center, 2500 N. State Street, Jackson, MS 39216, USA
| | - Azeddine Atfi
- Laboratory of Cell Signaling and Carcinogenesis, INSERM UMRS938, 184 Rue du Faubourg St-Antoine, 75571 Paris, France; Department of Biochemistry, University of Mississippi Medical Center, 2500 N. State Street, Jackson, MS 39216, USA.
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24
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TG-interacting factor mediates arsenic-induced malignant transformation of keratinocytes via c-Src/EGFR/AKT/FOXO3A and redox signalings. Arch Toxicol 2014; 89:2229-41. [DOI: 10.1007/s00204-014-1445-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 12/17/2014] [Indexed: 12/13/2022]
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25
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Chio CC, Chang CP, Lin MT, Su FC, Yang CZ, Tseng HY, Liu ZM, Huang HS. Involvement of TG-interacting factor in microglial activation during experimental traumatic brain injury. J Neurochem 2014; 131:816-24. [PMID: 25319900 DOI: 10.1111/jnc.12971] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 09/13/2014] [Accepted: 10/06/2014] [Indexed: 11/28/2022]
Abstract
Traumatic brain injury (TBI) is a complex injury involving several physiological alterations, potentially leading to neurological impairment. Previous mouse studies using high-density oligonucleotide array analysis have confirmed the upregulation of transforming growth-interacting factor (TGIF) mRNA in TBI. TGIF is a transcriptional corepressor of transforming growth factor beta (TGF-β) signaling which plays a protective role in TBI. However, the functional roles of TGIF in TBI are not well understood. In this study, we used confocal microscopy after immunofluorescence staining to demonstrate the increase of TGIF levels in the activated microglia of the pericontusional cortex of rats with TBI. Intracerebral knockdown of TGIF in the pericontusional cortex significantly downregulated TGIF expression, attenuated microglial activation, reduced the volume of damaged brain tissue, and facilitated recovery of limb motor function. Collectively, our results indicate that TGIF is involved in TBI-induced microglial activation, resulting in secondary brain injury and motor dysfunction. This study investigated the roles of transforming growth-interacting factor (TGIF) in a traumatic brain injury (TBI)-rat model. We demonstrated the increase of TGIF levels in the activated microglia of the pericontusional cortex of rats with TBI. Intracerebral knockdown of TGIF in the pericontusional cortex of the TBI rats significantly attenuated micoglial activation, reduced the volume of damaged brain tissue, and facilitated recovery of limb motor function. We suggest that inhibition of TGIF might provide a promising therapeutic strategy for TBI.
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26
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Willer A, Jakobsen JS, Ohlsson E, Rapin N, Waage J, Billing M, Bullinger L, Karlsson S, Porse BT. TGIF1 is a negative regulator of MLL-rearranged acute myeloid leukemia. Leukemia 2014; 29:1018-31. [PMID: 25349154 DOI: 10.1038/leu.2014.307] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 10/01/2014] [Accepted: 10/16/2014] [Indexed: 11/09/2022]
Abstract
Members of the TALE (three-amino-acid loop extension) family of atypical homeodomain-containing transcription factors are important downstream effectors of oncogenic fusion proteins involving the mixed lineage leukemia (MLL) gene. A well-characterized member of this protein family is MEIS1, which orchestrates a transcriptional program required for the maintenance of MLL-rearranged acute myeloid leukemia (AML). TGIF1/TGIF2 are relatively uncharacterized TALE transcription factors, which, in contrast to the remaining family, have been shown to act as transcriptional repressors. Given the general importance of this family in malignant hematopoiesis, we therefore tested the potential function of TGIF1 in the maintenance of MLL-rearranged AML. Gene expression analysis of MLL-rearranged patient blasts demonstrated reduced TGIF1 levels, and, in accordance, we find that forced expression of TGIF1 in MLL-AF9-transformed cells promoted differentiation and cell cycle exit in vitro, and delayed leukemic onset in vivo. Mechanistically, we show that TGIF1 interferes with a MEIS1-dependent transcriptional program by associating with MEIS1-bound regions in a competitive manner and that the MEIS1:TGIF1 ratio influence the clinical outcome. Collectively, these findings demonstrate that TALE family members can act both positively and negatively on transcriptional programs responsible for leukemic maintenance and provide novel insights into the regulatory gene expression circuitries in MLL-rearranged AML.
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Affiliation(s)
- A Willer
- 1] The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark [2] Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark [3] Danish Stem Cell Centre (DanStem) Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - J S Jakobsen
- 1] The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark [2] Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark [3] Danish Stem Cell Centre (DanStem) Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - E Ohlsson
- 1] The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark [2] Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark [3] Danish Stem Cell Centre (DanStem) Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - N Rapin
- 1] The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark [2] Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark [3] Danish Stem Cell Centre (DanStem) Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark [4] The Bioinformatic Centre, Department of Biology, Faculty of Natural Sciences, University of Copenhagen, Copenhagen, Denmark
| | - J Waage
- 1] The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark [2] Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark [3] Danish Stem Cell Centre (DanStem) Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark [4] The Bioinformatic Centre, Department of Biology, Faculty of Natural Sciences, University of Copenhagen, Copenhagen, Denmark
| | - M Billing
- Molecular Medicine and Gene Therapy, Lund Stem Cell Centre, Lund, Sweden
| | - L Bullinger
- Department of Internal Medicine III, University Hospital of Ulm, Ulm, Germany
| | - S Karlsson
- Molecular Medicine and Gene Therapy, Lund Stem Cell Centre, Lund, Sweden
| | - B T Porse
- 1] The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark [2] Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark [3] Danish Stem Cell Centre (DanStem) Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
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Jin G, Gao Y, Lin HK. Cytoplasmic PML: from molecular regulation to biological functions. J Cell Biochem 2014; 115:812-8. [PMID: 24288198 DOI: 10.1002/jcb.24727] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 11/19/2013] [Indexed: 01/18/2023]
Abstract
The tumor suppressor promyelocytic leukemia protein (PML) is predominantly localized in the nucleus, where it is essential for the formation and stabilization of the PML nuclear bodies (PML-NBs). PML-NBs are involved in the regulation of numerous cellular functions, such as tumorigenesis, DNA damage and antiviral responses. Despite its nuclear localization, a small portion of PML has been found in the cytoplasm. A number of studies recently demonstrated that the cytoplasmic PML (cPML) has diverse functions in many cellular processes including tumorigenesis, metabolism, antiviral responses, cell cycle regulation, and laminopothies. In this prospective, we will summarize the current viewpoints on the regulation and biological significance of cPML and discuss the important questions that still need to be further answered.
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Affiliation(s)
- Guoxiang Jin
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, 77030
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Yamada N, Tsujimura N, Kumazaki M, Shinohara H, Taniguchi K, Nakagawa Y, Naoe T, Akao Y. Colorectal cancer cell-derived microvesicles containing microRNA-1246 promote angiogenesis by activating Smad 1/5/8 signaling elicited by PML down-regulation in endothelial cells. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2014; 1839:1256-72. [PMID: 25218966 DOI: 10.1016/j.bbagrm.2014.09.002] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 08/28/2014] [Accepted: 09/02/2014] [Indexed: 01/08/2023]
Abstract
Emerging studies on circulating microRNAs (miRNAs) or microvesicles (MVs) have shown the potential of them to be novel biomarkers and therapeutic targets for cancer. However, the biological roles of these miRNAs and MVs have not been validated yet. To determine the biological significance of MVs, we used human colorectal cancer cells as the MV donor and endothelial cells (HUVECs) as the MV recipient and demonstrated the transfer of colorectal cancer cell-derived MVs (CRC-MVs) to HUVECs and evaluated the roles of these MVs and their cargo in tumor angiogenesis. Consequently, the incubation of HUVECs with CRC-MVs promoted the proliferation, migration, and tube formation activities of these cells. Among the cargoes shuttled by the MVs, miR-1246 and TGF-β were considered to be responsible for the pro-angiogenic function of MVs by activating Smad 1/5/8 signaling in the HUVECs. These results suggest that colorectal cancer cells secreted MVs to contribute to tumor angiogenesis.
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Affiliation(s)
- Nami Yamada
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 yanagido, Gifu-city, Gifu 501-1193, Japan.
| | - Nonoka Tsujimura
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 yanagido, Gifu-city, Gifu 501-1193, Japan
| | - Minami Kumazaki
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 yanagido, Gifu-city, Gifu 501-1193, Japan
| | - Haruka Shinohara
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 yanagido, Gifu-city, Gifu 501-1193, Japan
| | - Kohei Taniguchi
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 yanagido, Gifu-city, Gifu 501-1193, Japan
| | - Yoshihito Nakagawa
- Department of Gastroenterology, School of Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake-shi, Aichi 470-1192, Japan
| | - Tomoki Naoe
- Department of Hematology and Oncology, Graduate School of Medicine, Nagoya University, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Yukihiro Akao
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 yanagido, Gifu-city, Gifu 501-1193, Japan
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29
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Larroque-Cardoso P, Mucher E, Grazide MH, Josse G, Schmitt AM, Nadal-Wolbold F, Zarkovic K, Salvayre R, Nègre-Salvayre A. 4-Hydroxynonenal impairs transforming growth factor-β1-induced elastin synthesis via epidermal growth factor receptor activation in human and murine fibroblasts. Free Radic Biol Med 2014; 71:427-436. [PMID: 24561579 DOI: 10.1016/j.freeradbiomed.2014.02.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 02/12/2014] [Accepted: 02/13/2014] [Indexed: 01/17/2023]
Abstract
Elastin is a long-lived protein and a key component of connective tissues. The tissular elastin content decreases during chronological aging, and the mechanisms underlying its slow repair are not known. Lipid oxidation products that accumulate in aged tissues may generate protein dysfunction. We hypothesized that 4-hydroxynonenal (4-HNE), a highly reactive α,β-aldehydic product generated from polyunsaturated fatty acid peroxidation, could contribute to inhibiting elastin repair by antagonizing the elastogenic signaling of transforming growth factor-β1 (TGF-β1) in skin fibroblasts. We report that a low 4-HNE concentration (2µmol/L) inhibits the upregulation of tropoelastin expression stimulated by TGF-β1 in human and murine fibroblasts. The study of signaling pathways potentially involved in the regulation of elastin expression showed that 4-HNE did not block the phosphorylation of Smad3, an early step of TGF-β1 signaling, but inhibited the nuclear translocation of Smad2. Concomitantly, 4-HNE modified and stimulated the phosphorylation of the epidermal growth factor receptor (EGFR) and subsequently ERK1/2 activation, leading to the phosphorylation/stabilization of the Smad transcriptional corepressor TGIF, which antagonizes TGF-β1 signaling. Inhibitors of EGFR (AG1478) and MEK/ERK (PD98059), and EGFR-specific siRNAs, reversed the inhibitory effect of 4-HNE on TGF-β1-induced nuclear translocation of Smad2 and tropoelastin synthesis. In vivo studies on aortas from aged C57BL/6 mice showed that EGFR is modified by 4-HNE, in correlation with an increased 4-HNE-adduct accumulation and decreased elastin content. Altogether, these data suggest that 4-HNE inhibits the elastogenic activity of TGF-β1, by modifying and activating the EGFR/ERK/TGIF pathway, which may contribute to altering elastin repair in chronological aging and oxidative stress-associated aging processes.
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Affiliation(s)
| | - Elodie Mucher
- INSERM UMR-1048, 31432 Toulouse Cedex 4, France; University of Toulouse, Toulouse, France
| | | | - Gwendal Josse
- Centre Européen de Recherche sur la Peau, Pierre Fabre Dermocosmetique, Toulouse, France
| | - Anne-Marie Schmitt
- Centre Européen de Recherche sur la Peau, Pierre Fabre Dermocosmetique, Toulouse, France
| | - Florence Nadal-Wolbold
- Centre Européen de Recherche sur la Peau, Pierre Fabre Dermocosmetique, Toulouse, France
| | | | - Robert Salvayre
- INSERM UMR-1048, 31432 Toulouse Cedex 4, France; University of Toulouse, Toulouse, France
| | - Anne Nègre-Salvayre
- INSERM UMR-1048, 31432 Toulouse Cedex 4, France; University of Toulouse, Toulouse, France.
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Maarifi G, Chelbi-Alix MK, Nisole S. PML control of cytokine signaling. Cytokine Growth Factor Rev 2014; 25:551-61. [PMID: 24861946 DOI: 10.1016/j.cytogfr.2014.04.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 04/29/2014] [Indexed: 12/30/2022]
Abstract
The promyelocytic leukemia (PML) protein is a tumor suppressor acting as the organizer of nuclear matrix-associated structures named nuclear bodies (NBs). The involvement of PML in various cell processes, including cell death, senescence or antiviral defense underlines the multiple functions of PML due to its ability to interact with various partners either in the cytoplasm or in the nucleus. The importance of paracrine signaling in the regulation of PML expression is well established. More recently, a growing body of evidence also supports PML as a key regulator of cytokine signaling. These findings shed light on unsuspected biological functions of PML such as immune response, inflammation and cytokine-induced apoptosis. Here we review the current understanding of the pleiotropic activities of PML on cytokine-induced signaling.
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Affiliation(s)
- Ghizlane Maarifi
- INSERM UMR-S 1124, Université Paris Descartes, 45 rue des Saint-Pères, 75006 Paris, France
| | - Mounira K Chelbi-Alix
- INSERM UMR-S 1124, Université Paris Descartes, 45 rue des Saint-Pères, 75006 Paris, France
| | - Sébastien Nisole
- INSERM UMR-S 1124, Université Paris Descartes, 45 rue des Saint-Pères, 75006 Paris, France.
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31
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Gamell C, Jan Paul P, Haupt Y, Haupt S. PML tumour suppression and beyond: Therapeutic implications. FEBS Lett 2014; 588:2653-62. [DOI: 10.1016/j.febslet.2014.02.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 02/05/2014] [Accepted: 02/05/2014] [Indexed: 01/24/2023]
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Abstract
Otitis media (OM) is a common cause of childhood hearing loss. The large medical costs involved in treating this condition have meant that research to understand the pathology of this disease and identify new therapeutic interventions is important. There is evidence that susceptibility to OM has a significant genetic component, although little is known about the key genetic pathways involved. Mouse models for disease have become an important resource to understand a variety of human pathologies, including OM, due to the ability to easily manipulate their genetic components. This has enabled researchers to create models of acute OM, and has aided in the identification of a number of new genes associated with chronic disease, through the use of mutagenesis programs. The use of mouse models has identified a number of key molecular signalling pathways involved in the development of this condition, with genes identified from models shown to be associated with human OM.
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Abstract
TG-interacting factor 1 (TGIF1) is a transcriptional repressor that can modulate retinoic acid and transforming growth factor β signaling pathways. It is required for myeloid progenitor cell differentiation and survival, and mutations in the TGIF1 gene cause holoprosencephaly. Furthermore, we have previously observed that acute myelogenous leukemia (AML) patients with low TGIF1 levels had worse prognoses. Here, we explored the role of Tgif1 in murine hematopoietic stem cell (HSC) function. CFU assays showed that Tgif1(-/-) bone marrow cells produced more total colonies and had higher serial CFU potential. These effects were also observed in vivo, where Tgif1(-/-) bone marrow cells had higher repopulation potential in short- and long-term competitive repopulation assays than wild-type cells. Serial transplantation and replating studies showed that Tgif1(-/-) HSCs exhibited greater self-renewal and were less proliferative and more quiescent than wild-type cells, suggesting that Tgif1 is required for stem cells to enter the cell cycle. Furthermore, HSCs from Tgif1(+/-) mice had a phenotype similar to that of HSCs from Tgif1(-/-) mice, while bone marrow cells with overexpressing Tgif1 showed increased proliferation and lower survival in long-term transplant studies. Taken together, our data suggest that Tgif1 suppresses stem cell self-renewal and provide clues as to how reduced expression of TGIF1 may contribute to poor long-term survival in patients with AML.
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Ettahar A, Ferrigno O, Zhang MZ, Ohnishi M, Ferrand N, Prunier C, Levy L, Bourgeade MF, Bieche I, Romero DG, Colland F, Atfi A. Identification of PHRF1 as a tumor suppressor that promotes the TGF-β cytostatic program through selective release of TGIF-driven PML inactivation. Cell Rep 2013; 4:530-41. [PMID: 23911286 DOI: 10.1016/j.celrep.2013.07.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 04/17/2013] [Accepted: 07/08/2013] [Indexed: 11/16/2022] Open
Abstract
The homeodomain protein TGIF (TG-interacting factor) restricts TGF-β/Smad cytostatic signaling by interfering with the nucleocytoplasmic transit of the tumor suppressor cPML. Here, we identify PHRF1 as a ubiquitin ligase that enforces TGIF decay by driving its ubiquitination at lysine 130. In so doing, PHRF1 ensures redistribution of cPML into the cytoplasm, where it associates with SARA and coordinates activation of Smad2 by the TGF-β receptor. The PHRF1 gene resides within the tumor suppressor locus 11p15.5, which displays frequent loss in a wide variety of malignancies, including breast cancer. Remarkably, we found that the PHRF1 gene is deleted or silenced in a high proportion of human breast cancer samples and cancer cell lines. Reconstitution of PHRF1 into deficient cells impeded their propensity to form tumors in vivo, most likely because of the reemergence of TGF-β responsiveness. These findings unveil a paradigm behind inactivation of the cPML tumor suppressor network in human malignancies.
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Affiliation(s)
- Asma Ettahar
- Laboratory of Cell Signaling and Carcinogenesis, INSERM UMRS938, 184 Rue du Faubourg St-Antoine, 75571 Paris, France
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35
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Zhang X, Min KW, Liggett J, Baek SJ. Disruption of the transforming growth factor-β pathway by tolfenamic acid via the ERK MAP kinase pathway. Carcinogenesis 2013; 34:2900-7. [PMID: 23864386 DOI: 10.1093/carcin/bgt250] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Transforming growth factor-β (TGF-β) modulates diverse cell physiological processes and plays a complicated role in tumor development. It has been well established that TGF-β inhibits cell proliferation in normal and early stage carcinoma and facilitates tumor metastasis in late-stage carcinoma. Therefore, blocking TGF-β signaling in advanced stage carcinogenesis provides a potentially interesting chemotherapeutic strategy. We aimed to determine the effect of tolfenamic acid (TA) on TGF-β-induced protumorigenic activity. Here, we demonstrate that TA attenuates tumor-promoting effects of TGF-β in cancer cells. Further observation indicates TA blocks the TGF-β/Smad pathway, and this blockage is mainly attributed to the interference of TGF-β1-driven phosphorylation of Smad2/3. We also show that TA could exert this effect on cancer cell lines from several different origins and that TA is much better than other non-steroidal anti-inflammatory drugs with respect to inhibition of TGF-β1-induced Smad2 phosphorylation. Finally, extracellular signal-regulated kinase mitogen-activated protein kinase plays a role in TA-induced suppression of Smad2/3 phosphorylation and subsequent nuclear accumulation of Smad2/3 in response to TGF-β1. Our study provides a possible mechanism by which TA affects anticancer activity by inhibiting the TGF-β pathway and sheds light on the application of TA for cancer patients.
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Affiliation(s)
- Xiaobo Zhang
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996, USA and
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36
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Tateossian H, Morse S, Parker A, Mburu P, Warr N, Acevedo-Arozena A, Cheeseman M, Wells S, Brown SD. Otitis media in the Tgif knockout mouse implicates TGFβ signalling in chronic middle ear inflammatory disease. Hum Mol Genet 2013; 22:2553-65. [PMID: 23459932 PMCID: PMC3674796 DOI: 10.1093/hmg/ddt103] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 02/23/2013] [Indexed: 01/07/2023] Open
Abstract
Otitis media with effusion (OME) is the most common cause of hearing loss in children and tympanostomy to alleviate the condition remains the commonest surgical intervention in children in the developed world. Chronic and recurrent forms of OM are known to have a very significant genetic component, however, until recently little was known of the underlying genes involved. The identification of mouse models of chronic OM has indicated a role of transforming growth factor beta (TGFβ) signalling and its impact on responses to hypoxia in the inflamed middle ear. We have, therefore, investigated the role of TGFβ signalling and identified and characterized a new model of chronic OM carrying a mutation in the gene for transforming growth interacting factor 1 (Tgif1). Tgif1 homozygous mutant mice have significantly raised auditory thresholds due to a conductive deafness arising from a chronic effusion starting at around 3 weeks of age. The OM is accompanied by a significant thickening of the middle ear mucosa lining, expansion of mucin-secreting goblet cell populations and raised levels of vascular endothelial growth factor, TNF-α and IL-1β in ear fluids. We also identified downstream effects on TGFβ signalling in middle ear epithelia at the time of development of chronic OM. Both phosphorylated SMAD2 and p21 levels were lowered in the homozygous mutant, demonstrating a suppression of the TGFβ pathway. The identification and characterization of the Tgif mutant supports the role of TGFβ signalling in the development of chronic OM and provides an important candidate gene for genetic studies in the human population.
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Affiliation(s)
| | - Susan Morse
- MRC Mammalian Genetics Unit, Harwell OX11 0RD, UK and
| | - Andrew Parker
- MRC Mammalian Genetics Unit, Harwell OX11 0RD, UK and
| | | | - Nick Warr
- MRC Mammalian Genetics Unit, Harwell OX11 0RD, UK and
| | | | | | - Sara Wells
- Mary Lyon Centre, MRC Harwell, Harwell OX11 0RD, UK
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Jin G, Wang YJ, Lin HK. Emerging Cellular Functions of Cytoplasmic PML. Front Oncol 2013; 3:147. [PMID: 23761861 PMCID: PMC3674320 DOI: 10.3389/fonc.2013.00147] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Accepted: 05/21/2013] [Indexed: 11/23/2022] Open
Abstract
The tumor suppressor promyelocytic leukemia protein (PML) is located primarily in the nucleus, where it is the scaffold component of the PML nuclear bodies (PML-NBs). PML-NBs regulate multiple cellular functions, such as apoptosis, senescence, DNA damage response, and resistance to viral infection. Despite its nuclear localization, a small portion of PML has been identified in the cytoplasm. The cytoplasmic PML (cPML) could be originally derived from the retention of exported nuclear PML (nPML). In addition, bona fide cPML isoforms devoid of nuclear localization signal (NLS) have also been identified. Recently, emerging evidence showed that cPML performs its specific cellular functions in tumorigenesis, glycolysis, antiviral responses, laminopothies, and cell cycle regulation. In this review, we will summarize the emerging roles of cPML in cellular functions.
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Affiliation(s)
- Guoxiang Jin
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center , Houston, TX , USA
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38
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Zerlanko BJ, Bartholin L, Melhuish TA, Wotton D. Premature senescence and increased TGFβ signaling in the absence of Tgif1. PLoS One 2012; 7:e35460. [PMID: 22514746 PMCID: PMC3325954 DOI: 10.1371/journal.pone.0035460] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Accepted: 03/19/2012] [Indexed: 01/07/2023] Open
Abstract
Transforming growth factor β (TGFβ) signaling regulates cell cycle progression in several cell types, primarily by inducing a G1 cell cycle arrest. Tgif1 is a transcriptional corepressor that limits TGFβ responsive gene expression. Here we demonstrate that primary mouse embryo fibroblasts (MEFs) lacking Tgif1 proliferate slowly, accumulate increased levels of DNA damage, and senesce prematurely. We also provide evidence that the effects of loss of Tgif1 on proliferation and senescence are not limited to primary cells. The increased DNA damage in Tgif1 null MEFs can be partially reversed by culturing cells at physiological oxygen levels, and growth in normoxic conditions also partially rescues the proliferation defect, suggesting that in the absence of Tgif1 primary MEFs are less able to cope with elevated levels of oxidative stress. Additionally, we show that Tgif1 null MEFs are more sensitive to TGFβ-mediated growth inhibition, and that treatment with a TGFβ receptor kinase inhibitor increases proliferation of Tgif1 null MEFs. Conversely, persistent treatment of wild type cells with low levels of TGFβ slows proliferation and induces senescence, suggesting that TGFβ signaling also contributes to cellular senescence. We suggest that in the absence of Tgif1, a persistent increase in TGFβ responsive transcription and a reduced ability to deal with hyperoxic stress result in premature senescence in primary MEFs.
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Affiliation(s)
| | | | | | - David Wotton
- Department of Biochemistry and Molecular Genetics and Center for Cell Signaling, University of Virginia, Charlottesville, Virginia, United States of America
- * E-mail:
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Abstract
The promyelocytic leukaemia gene PML was originally identified at the t(15;17) translocation of acute promyelocytic leukaemia, which generates the oncogene PML-retinoic acid receptor α. PML epitomises a subnuclear structure called PML nuclear body. Current models propose that PML through its scaffold properties is able to control cell growth and survival at many different levels. Here we discuss the current literature and propose new avenues for investigation.
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40
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Abstract
Transforming growth factor-β (TGF-β) family signaling regulates cell growth and differentiation of many different cell types and is widely involved in the regulation of homeostasis during both embryogenesis and adult life. Therefore, aberrant TGF-β family signal transduction is linked to congenital disorders, tumorigenicity, and fibrosis, which can be life-threatening. A specific receptor-ligand complex initiates transduction of TGF-β family signaling to the nucleus via intracellular signal molecules, mainly Smads, whereby a number of bioactivities such as wound healing, immunomodulation, apoptosis, and angiogenesis are controlled. To avoid an excess of TGF-β family signaling in cells, the duration and intensity of the TGF-β family signal appear to be subject to elaborate regulation. In this paper, we describe recent advances in the understanding of how TGF-β family signals are perturbed and terminated to maintain homeostasis in cells.
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Affiliation(s)
- Susumu Itoh
- Laboratory of Biochemistry, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan.
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41
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Song K, Peng S, Sun Z, Li H, Yang R. Curcumin suppresses TGF-β signaling by inhibition of TGIF degradation in scleroderma fibroblasts. Biochem Biophys Res Commun 2011; 411:821-5. [DOI: 10.1016/j.bbrc.2011.07.044] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Accepted: 07/08/2011] [Indexed: 11/29/2022]
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Carracedo A, Ito K, Pandolfi PP. The nuclear bodies inside out: PML conquers the cytoplasm. Curr Opin Cell Biol 2011; 23:360-6. [PMID: 21501958 DOI: 10.1016/j.ceb.2011.03.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 03/11/2011] [Accepted: 03/19/2011] [Indexed: 11/15/2022]
Abstract
The promyelocytic leukemia (PML) protein is the core component of nuclear substructures that host more than 70 proteins, termed nuclear domains 10 or PML-nuclear bodies. PML was first identified as the gene participating in the translocation responsible for the pathogenesis of acute promyelocytic leukemia (APL). The notion that PML is a tumor suppressor gene was soon extrapolated from leukemia to solid tumors. The last decade has radically changed the view of how this tumor suppressor is regulated, how it can be therapeutically targeted, and how it functions. Notably, one of the most recent and striking features uncovered is how PML regulates cellular homeostasis outside its original niche in the nucleus. These new findings open an exciting new area of research in extra-nuclear PML functions.
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Affiliation(s)
- Arkaitz Carracedo
- CIC bioGUNE, Technology Park of Bizkaia, 48160 Derio, Bizkaia, Spain
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Park KH, Nam EH, Seo GY, Seo SR, Kim PH. Tiul1 and TGIF are Involved in Downregulation of TGFbeta1-induced IgA Isotype Expression. Immune Netw 2010; 9:248-54. [PMID: 20157612 PMCID: PMC2816958 DOI: 10.4110/in.2009.9.6.248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 12/04/2009] [Accepted: 12/09/2009] [Indexed: 01/17/2023] Open
Abstract
TGF-β1 is well known to induce Ig germ-line α (GLα) transcription and subsequent IgA isotype class switching recombination (CSR). Homeodomain protein TG-interacting factor (TGIF) and E3-ubiquitin ligases TGIF interacting ubiquitin ligase 1 (Tiul1) are implicated in the negative regulation of TGF-β signaling. In the present study, we investigated the roles of Tiul1 and TGIF in TGFβ1-induced IgA CSR. We found that over-expression of Tiul1 decreased TGFβ1-induced GLα promoter activity and strengthened the inhibitory effect of Smad7 on the promoter activity. Likewise, overexpression of TGIF also diminished GLα promoter activity and further strengthened the inhibitory effect of Tiul1, suggesting that Tiul1 and TGIF can down-regulate TGFβ1-induced GLα expression. In parallel, overexpression of Tiul1 decreased the expression of endogenous IgA CSR-predicitive transcripts (GLTα, PSTα, and CTα) and TGFβ1-induced IgA secretion, but not GLTγ3 and IgG3 secretion. Here, over-expressed TGIF further strengthened the inhibitory effect of Tiul1. These results suggest that Tiul1 and TGIF act as negatively regulators in TGFβ1-induced IgA isotype expression.
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Affiliation(s)
- Kyoung-Hoon Park
- Department of Molecular Bioscience, School of Bioscience and Biotechnology, Kangwon National University, Chuncheon 200-701, Korea
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Demange C, Ferrand N, Prunier C, Bourgeade MF, Atfi A. A model of partnership co-opted by the homeodomain protein TGIF and the Itch/AIP4 ubiquitin ligase for effective execution of TNF-alpha cytotoxicity. Mol Cell 2010; 36:1073-85. [PMID: 20064471 DOI: 10.1016/j.molcel.2009.12.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 06/11/2009] [Accepted: 11/19/2009] [Indexed: 01/15/2023]
Abstract
The homeodomain protein TGIF functions as a negative regulator of multiple classes of transcription factors. Here we report on the characterization of TGIF as an essential component of the tumor necrosis factor alpha (TNF-alpha) cytotoxic program. This proapoptotic role of TGIF does not appear to rely on transcriptional modulation but instead is executed in conjunction with Itch/AIP4, an E3 ubiquitin ligase operating in TNF-alpha-induced apoptosis through its ability to target the caspase antagonist cFlip(L) for degradation. Notably, we found that activation of TNF-alpha signaling induced the association of TGIF with Itch/AIP4, resulting in increased accessibility of cFlip(L) for association and ubiquitination by Itch/AIP4. Moreover, we show that Itch/AIP4 can also stabilize the TGIF protein in response to TNF-alpha by triggering its monoubiquitination at lysine 259, thereby revealing the existence of a functional network that can evolve into a positive feedback loop for ensuring effective execution of the TNF-alpha apoptotic signaling.
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Huang HS, Liu ZM, Hong DY. Blockage of JNK pathway enhances arsenic trioxide-induced apoptosis in human keratinocytes. Toxicol Appl Pharmacol 2010; 244:234-41. [PMID: 20074581 DOI: 10.1016/j.taap.2009.12.037] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 12/25/2009] [Accepted: 12/30/2009] [Indexed: 12/12/2022]
Abstract
Arsenic is well known as a carcinogen predisposing humans to some severe diseases and also as an effective medicine for treating acute promyelocytic leukemia, syphilis, and psoriasis. Multiple active mechanisms, including cell cycle arrest and apoptosis, have been proposed in therapy; however, the opposing effects of arsenic remain controversial. Our previous study found that arsenic trioxide (ATO)-induced activation of p21(WAF1/CIP1) (p21) led to A431 cell death through the antagonistic effects of the signaling of ERK1/2 and JNK1. In the current study, the inhibitory effects of JNK1 on ATO-induced p21 expression were explored. Over-expression of JNK1 in A431 cells could inhibit p21 expression, which was associated with HDAC1 and TGIF. Using the GST pull-down assay and fluorescence resonance energy transfer analysis, N-terminal domain (amino acids 1-108) of TGIF, critical to its binding with c-Jun, was found. Using reporter assays, requirement of the C-terminal domain (amino acids 138-272) of TGIF to suppress ATO-induced p21 expression was observed. Thus, the domains of TGIF that carried out its inhibitory effects on p21 were identified. Finally, treatment with JNK inhibitor SP600125 could enhance ATO-induced apoptosis of HaCaT keratinocytes by using flow cytometry.
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Affiliation(s)
- Huei-Sheng Huang
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan.
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Hamid R, Brandt SJ. Transforming growth-interacting factor (TGIF) regulates proliferation and differentiation of human myeloid leukemia cells. Mol Oncol 2009; 3:451-63. [PMID: 19699159 PMCID: PMC5527533 DOI: 10.1016/j.molonc.2009.07.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2009] [Revised: 06/29/2009] [Accepted: 07/13/2009] [Indexed: 11/26/2022] Open
Abstract
Transforming growth-interacting factor (TGIF) is a homeobox transcriptional repressor that has been implicated in holoprosencephaly and various types of cancer. TGIF is expressed in hematopoietic stem cells and modulates TGF-beta and retinoic acid (RA) signaling, both of which play an important role in hematopoiesis. We recently reported that TGIF's levels correlate inversely with survival in patients with acute myelogenous leukemia. Here we present the first direct evidence of a role for TGIF in myelopoiesis. We used short hairpin RNA interference to define the effects of TGIF knockdown on proliferation and differentiation of myeloid leukemia-derived cell lines. Decreased TGIF expression resulted in reduced proliferation and differentiation and lower expression of CEBPbeta, CEBPepsilon, PU.1 and RUNX1, key myeloid transcription factors. Furthermore, TGF-beta signaling was increased and RA signaling was decreased. Further insights into the molecular basis of TGIF's effects were provided by a genome-wide chromatin immunoprecipitation-based elucidation of TGIF target genes. Together, these data suggest that TGIF has an important role myelopoiesis and may regulate the balance between proliferation and differentiation. Reduced TGIF expression could tip the balance toward quiescence thus providing progenitor as well as hematopoietic stem cells protection from anti-cycle agents.
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Affiliation(s)
- Rizwan Hamid
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN 37232, United States.
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Kang JS, Liu C, Derynck R. New regulatory mechanisms of TGF-beta receptor function. Trends Cell Biol 2009; 19:385-94. [PMID: 19648010 DOI: 10.1016/j.tcb.2009.05.008] [Citation(s) in RCA: 263] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 05/05/2009] [Accepted: 05/08/2009] [Indexed: 12/24/2022]
Abstract
Transforming growth factor-beta (TGF-beta) regulates cell proliferation, differentiation and apoptosis, and TGF-beta-related proteins have key roles in development, tissue homeostasis and disease. Upon binding to their cell surface receptors, TGF-beta family proteins signal through Smads to induce changes in gene expression. TGF-beta-induced Smad signaling and additional non-Smad pathways have been studied extensively in an effort to understand the complex and versatile responses to TGF-beta family proteins. Recently, it has become increasingly apparent that the signaling responses are also extensively defined by regulatory mechanisms at the level of the receptors themselves. Here, we discuss recent insights into the effects of post-translational modifications, protein associations and mode of internalization on the functions of the TGF-beta receptors and their signaling responses.
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Affiliation(s)
- Jong Seok Kang
- Department of Cell and Tissue Biology, University of California - San Francisco, San Francisco, CA 94143, USA
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48
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Yen-Ping Ho J, Man WC, Wen Y, Polan ML, Shih-Chu Ho E, Chen B. Transforming growth interacting factor expression in leiomyoma compared with myometrium. Fertil Steril 2009; 94:1078-83. [PMID: 19524896 DOI: 10.1016/j.fertnstert.2009.05.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Revised: 03/11/2009] [Accepted: 05/05/2009] [Indexed: 10/20/2022]
Abstract
OBJECTIVE To investigate the expression of transforming growth interacting factor (TGIF), a Smad transcriptional corepressor, in leiomyoma and matched myometrial tissue samples and the effect of TGIF overexpression in myometrial cells. DESIGN Experimental study. SETTING Tertiary university hospital. PATIENT(S) Uterine leiomyoma and myometrial tissues from 16 patients. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) The distribution of TGIF in leiomyoma and myometrial tissues by immunohistochemistry stain, mRNA, and protein expression levels by real-time quantitative polymerase chain-reaction (QPCR) and Western blot. Transcriptional regulation of TGIF in myometrial cells with overexpressed TGIF. RESULT(S) Although TGIF is present in the smooth muscle cells of the leiomyoma and the myometrium, it is not found in the extracellular matrix. The TGIF mRNA and protein expressions were statistically significantly higher in the leiomyoma compared with the matched, unaffected myometrial tissues in both phases of the menstrual cycle. There were no differences in mRNA or protein expression throughout the menstrual cycle. Overexpression of TGIF protein in myometrial cells statistically significantly suppressed up-regulation of plasminogen activator inhibitor (PAI-1) induced by TGF-beta1 treatment. CONCLUSION(S) Expression of TGIF is increased in leiomyoma compared with myometrium. This increase in TGIF expression is not affected by endogenous ovarian hormones. Thus, TGIF is a potential repressor of TGF-beta pathways in myometrial cells.
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Affiliation(s)
- Jason Yen-Ping Ho
- Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, California 94305-5317, USA
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49
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Reineke EL, Kao HY. Targeting promyelocytic leukemia protein: a means to regulating PML nuclear bodies. Int J Biol Sci 2009; 5:366-76. [PMID: 19471587 PMCID: PMC2686094 DOI: 10.7150/ijbs.5.366] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Accepted: 05/06/2009] [Indexed: 01/17/2023] Open
Abstract
The promyelocytic leukemia protein (PML) is involved in many cellular processes including cell cycle progression, DNA damage response, transcriptional regulation, viral infection, and apoptosis. These cellular activities often rely on the localization of PML to unique subnuclear structures known as PML nuclear bodies (NBs). More than 50 cellular proteins are known to traffic in and out of PML NBs, either transiently or constitutively. In order to understand the dynamics of these NBs, it is important to delineate the regulation of PML itself. PML is subject to extensive regulation at transcriptional, post-transcriptional, and post-translational levels. Many of these modes of regulation depend on the cellular context and the presence of extracellular signals. This review focuses on the current knowledge of regulation of PML under normal cellular conditions as well as the role for regulation of PML in viral infection and cancer.
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Affiliation(s)
- Erin L Reineke
- Department of Biochemistry, School of Medicine, Case Western Reserve University and the Comprehensive Cancer Center of CWRU, Cleveland, Ohio 44106, USA
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Battaglia S, Benzoubir N, Nobilet S, Charneau P, Samuel D, Zignego AL, Atfi A, Bréchot C, Bourgeade MF. Liver cancer-derived hepatitis C virus core proteins shift TGF-beta responses from tumor suppression to epithelial-mesenchymal transition. PLoS One 2009; 4:e4355. [PMID: 19190755 PMCID: PMC2629560 DOI: 10.1371/journal.pone.0004355] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Accepted: 12/18/2008] [Indexed: 12/13/2022] Open
Abstract
Background Chronic hepatitis C virus (HCV) infection and associated liver cirrhosis represent a major risk factor for hepatocellular carcinoma (HCC) development. TGF-β is an important driver of liver fibrogenesis and cancer; however, its actual impact in human cancer progression is still poorly known. The aim of this study was to investigate the role of HCC-derived HCV core natural variants on cancer progression through their impact on TGF-β signaling. Principal Findings We provide evidence that HCC-derived core protein expression in primary human or mouse hepatocyte alleviates TGF-β responses in terms or growth inhibition or apoptosis. Instead, in these hepatocytes TGF-β was still able to induce an epithelial to mesenchymal transition (EMT), a process that contributes to the promotion of cell invasion and metastasis. Moreover, we demonstrate that different thresholds of Smad3 activation dictate the TGF-β responses in hepatic cells and that HCV core protein, by decreasing Smad3 activation, may switch TGF-β growth inhibitory effects to tumor promoting responses. Conclusion/Significance Our data illustrate the capacity of hepatocytes to develop EMT and plasticity under TGF-β, emphasize the role of HCV core protein in the dynamic of these effects and provide evidence for a paradigm whereby a viral protein implicated in oncogenesis is capable to shift TGF-β responses from cytostatic effects to EMT development.
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Affiliation(s)
- Serena Battaglia
- Inserm, Unité 785, Villejuif, France
- Univ Paris-Sud, UMR-S 785, Villejuif, France
| | - Nassima Benzoubir
- Inserm, Unité 785, Villejuif, France
- Univ Paris-Sud, UMR-S 785, Villejuif, France
| | - Soizic Nobilet
- Inserm, Unité 785, Villejuif, France
- Univ Paris-Sud, UMR-S 785, Villejuif, France
| | | | - Didier Samuel
- Inserm, Unité 785, Villejuif, France
- Univ Paris-Sud, UMR-S 785, Villejuif, France
- AP-HP Hôpital Paul Brousse, Centre Hépato-Biliaire, Villejuif, France
| | - Anna Linda Zignego
- Department of Internal Medicine, University of Florence, Florence, Italia
| | | | | | - Marie-Françoise Bourgeade
- Inserm, Unité 785, Villejuif, France
- Univ Paris-Sud, UMR-S 785, Villejuif, France
- AP-HP Hôpital Paul Brousse, Centre Hépato-Biliaire, Villejuif, France
- * E-mail:
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