1
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Gattupalli M, Dey P, Poovizhi S, Patel RB, Mishra D, Banerjee S. The Prospects of RNAs and Common Significant Pathways in Cancer Therapy and Regenerative Medicine. Regen Med 2023. [DOI: 10.1007/978-981-19-6008-6_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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2
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Almiñana C, Dubuisson F, Bauersachs S, Royer E, Mermillod P, Blesbois E, Guignot F. Unveiling how vitrification affects the porcine blastocyst: clues from a transcriptomic study. J Anim Sci Biotechnol 2022; 13:46. [PMID: 35303969 PMCID: PMC8932223 DOI: 10.1186/s40104-021-00672-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 12/24/2021] [Indexed: 12/13/2022] Open
Abstract
Background Currently, there is a high demand for efficient pig embryo cryopreservation procedures in the porcine industry as well as for genetic diversity preservation and research purposes. To date, vitrification (VIT) is the most efficient method for pig embryo cryopreservation. Despite a high number of embryos survives in vitro after vitrification/warming procedures, the in vivo embryo survival rates after embryo transfer are variable among laboratories. So far, most studies have focused on cryoprotective agents and devices, while the VIT effects on porcine embryonic gene expression remained unclear. The few studies performed were based on vitrified/warmed embryos that were cultured in vitro (IVC) to allow them to re–expand. Thus, the specific alterations of VIT, IVC, and the cumulative effect of both remained unknown. To unveil the VIT-specific embryonic alterations, gene expression in VIT versus (vs.) IVC embryos was analyzed. Additionally, changes derived from both VIT and IVC vs. control embryos (CO) were analyzed to confirm the VIT embryonic alterations. Three groups of in vivo embryos at the blastocyst stage were analyzed by RNA–sequencing: (1) VIT embryos (vitrified/warmed and cultured in vitro), (2) IVC embryos and (3) CO embryos. Results RNA–sequencing revealed three clearly different mRNA profiles for VIT, IVC and CO embryos. Comparative analysis of mRNA profiles between VIT and IVC identified 321, differentially expressed genes (DEG) (FDR < 0.006). In VIT vs. CO and IVC vs. CO, 1901 and 1519 DEG were found, respectively, with an overlap of 1045 genes. VIT-specific functional alterations were associated to response to osmotic stress, response to hormones, and developmental growth. While alterations in response to hypoxia and mitophagy were related to the sum of VIT and IVC effects. Conclusions Our findings revealed new insights into the VIT procedure-specific alterations of embryonic gene expression by first comparing differences in VIT vs. IVC embryos and second by an integrative transcriptome analysis including in vivo control embryos. The identified VIT alterations might reflect the transcriptional signature of the embryo cryodamage but also the embryo healing process overcoming the VIT impacts. Selected validated genes were pointed as potential biomarkers that may help to improve vitrification. Supplementary Information The online version contains supplementary material available at 10.1186/s40104-021-00672-1.
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Affiliation(s)
- C Almiñana
- UMR PRC, INRAE 0085, CNRS 7247, Université de Tours, IFCE, F, -37380, Nouzilly, France. .,Functional Genomics Group, Institute of Veterinary Anatomy, VetSuisse Faculty Zurich, University of Zurich, Zürich, Switzerland.
| | - F Dubuisson
- UMR PRC, INRAE 0085, CNRS 7247, Université de Tours, IFCE, F, -37380, Nouzilly, France
| | - S Bauersachs
- Functional Genomics Group, Institute of Veterinary Anatomy, VetSuisse Faculty Zurich, University of Zurich, Zürich, Switzerland
| | - E Royer
- UEPAO, INRAE, F, -37380, Nouzilly, France
| | - P Mermillod
- UMR PRC, INRAE 0085, CNRS 7247, Université de Tours, IFCE, F, -37380, Nouzilly, France
| | - E Blesbois
- UMR PRC, INRAE 0085, CNRS 7247, Université de Tours, IFCE, F, -37380, Nouzilly, France
| | - F Guignot
- UMR PRC, INRAE 0085, CNRS 7247, Université de Tours, IFCE, F, -37380, Nouzilly, France
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3
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Abdellatif AAH, Tolba NS, Alsharidah M, Al Rugaie O, Bouazzaoui A, Saleem I, Ali AT. PEG-4000 formed polymeric nanoparticles loaded with cetuximab downregulate p21 &stathmin-1 gene expression in cancer cell lines. Life Sci 2022; 295:120403. [PMID: 35176277 DOI: 10.1016/j.lfs.2022.120403] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 02/05/2022] [Accepted: 02/10/2022] [Indexed: 12/12/2022]
Abstract
Cetuximab (CTX) is known to have cytotoxic effects on several human cancer cells in vitro; however, as CTX is poorly water soluble, there is a need for improved formulations can reach cancer cells at high concentrations with low side effects. We developed (PEG-4000) polymeric nanoparticles (PEGNPs) loaded with CTX and evaluated their in vitro cytotoxicity and anticancer properties against human lung (A549) and breast (MCF-7) cancer cells. CTX-PEGNPs were formulated using the solvent evaporation technique, and their morphological properties were evaluated. Further, the effects of CTX-PEGNPs on cell viability using the MTT assay and perform gene expression analysis, DNA fragmentation measurements, and the comet assay. CTX-PEGNP showed uniformly dispersed NPs of nano-size range (253.7 ± 0.3 nm), and low polydispersity index (0.16) indicating the stability and uniformity of NPs. Further, the zeta potential of the preparations was -17.0 ± 1.8 mv. DSC and FTIR confirmed the entrapping of CTX in NPs. The results showed IC50 values of 2.26 μg/mL and 1.83 μg/mL for free CTX and CTX-PEGNPs on the A549 cancer cell line, respectively. Moreover, CTX-PEGNPs had a lower IC50 of 1.12 μg/mL in MCF-7 cells than that of free CTX (2.28 μg/mL). The expression levels of p21 and stathmin-1 were significantly decreased in both cell lines treated with CTX-PEGNPs compared to CTX alone. The CTX-PEGNP-treated cells also showed increased DNA fragmentation rates in both cancer cell lines compared with CTX alone. The results indicated that CTX-PEGNP was an improved formulation than CTX alone to induce apoptosis and DNA damage and inhibit cell proliferation through the downregulation of P21 and stathmin-1 expression.
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Affiliation(s)
- Ahmed A H Abdellatif
- Department of Pharmaceutics, College of Pharmacy, Qassim University, Qassim 51452, Saudi Arabia; Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut 71524, Egypt.
| | - Nahla Sameh Tolba
- Department of Pharmaceutics, Faculty of Pharmacy, Sadat City University, Monufia 32897, Egypt.
| | - Mansour Alsharidah
- Department of Physiology, College of Medicine, Qassim University, Buraydah 51452, Saudi Arabia.
| | - Osamah Al Rugaie
- Department of Basic Medical Sciences, College of Medicine and Medical Sciences, Qassim University, Unaizah, P.O. Box 991, Al Qassim 51911, Saudi Arabia.
| | - Abdellatif Bouazzaoui
- Department of Medical Genetics, Faculty of Medicine, Umm Al-Qura University, Makkah 21955, Saudi Arabia; Science and Technology Unit, Umm Al-Qura University, Makkah 21955, Saudi Arabia.; Medical Clinic, Hematology/Oncology, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, Regensburg 93053, Germany.
| | - Imran Saleem
- School of Pharmacy & Biomolecular Sciences, Liverpool John Moores University, James Parsons Building, Liverpool L3 3AF, UK.
| | - Asmaa T Ali
- Department of Biochemistry, Faculty of Pharmacy, Nahda University, Beni-Suef 62513, Egypt.
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4
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de la Calle Arregui C, Plata-Gómez AB, Deleyto-Seldas N, García F, Ortega-Molina A, Abril-Garrido J, Rodriguez E, Nemazanyy I, Tribouillard L, de Martino A, Caleiras E, Campos-Olivas R, Mulero F, Laplante M, Muñoz J, Pende M, Sabio G, Sabatini DM, Efeyan A. Limited survival and impaired hepatic fasting metabolism in mice with constitutive Rag GTPase signaling. Nat Commun 2021; 12:3660. [PMID: 34135321 PMCID: PMC8209044 DOI: 10.1038/s41467-021-23857-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 05/17/2021] [Indexed: 12/16/2022] Open
Abstract
The mechanistic target of rapamycin complex 1 (mTORC1) integrates cellular nutrient signaling and hormonal cues to control metabolism. We have previously shown that constitutive nutrient signaling to mTORC1 by means of genetic activation of RagA (expression of GTP-locked RagA, or RagAGTP) in mice resulted in a fatal energetic crisis at birth. Herein, we rescue neonatal lethality in RagAGTP mice and find morphometric and metabolic alterations that span glucose, lipid, ketone, bile acid and amino acid homeostasis in adults, and a median lifespan of nine months. Proteomic and metabolomic analyses of livers from RagAGTP mice reveal a failed metabolic adaptation to fasting due to a global impairment in PPARα transcriptional program. These metabolic defects are partially recapitulated by restricting activation of RagA to hepatocytes, and revert by pharmacological inhibition of mTORC1. Constitutive hepatic nutrient signaling does not cause hepatocellular damage and carcinomas, unlike genetic activation of growth factor signaling upstream of mTORC1. In summary, RagA signaling dictates dynamic responses to feeding-fasting cycles to tune metabolism so as to match the nutritional state.
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Affiliation(s)
- Celia de la Calle Arregui
- Metabolism and Cell Signaling Laboratory, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Ana Belén Plata-Gómez
- Metabolism and Cell Signaling Laboratory, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Nerea Deleyto-Seldas
- Metabolism and Cell Signaling Laboratory, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Fernando García
- Proteomics Unit, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Ana Ortega-Molina
- Metabolism and Cell Signaling Laboratory, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Julio Abril-Garrido
- Metabolism and Cell Signaling Laboratory, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Elena Rodriguez
- Myocardial Pathophysiology, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Ivan Nemazanyy
- Platform for Metabolic Analyses, Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS 3633, Paris, France
| | - Laura Tribouillard
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec (CRIUCPQ), Faculté de Médecine, Université Laval, Québec, QC, Canada
- Centre de recherche sur le cancer de l'Université Laval, Université Laval, Québec, QC, Canada
| | - Alba de Martino
- Histopathology Unit. Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Eduardo Caleiras
- Histopathology Unit. Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Ramón Campos-Olivas
- Spectroscopy and NMR Unit, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Francisca Mulero
- Molecular Imaging Unit, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Mathieu Laplante
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec (CRIUCPQ), Faculté de Médecine, Université Laval, Québec, QC, Canada
- Centre de recherche sur le cancer de l'Université Laval, Université Laval, Québec, QC, Canada
| | - Javier Muñoz
- Proteomics Unit, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Mario Pende
- Institut Necker Enfants Malades, INSERM U1151, Université de Paris, Paris, France
| | - Guadalupe Sabio
- Myocardial Pathophysiology, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - David M Sabatini
- Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA, USA
- Department of Biology, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
- David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, MA, USA
- Broad Institute, Seven Cambridge Center, Cambridge, MA, USA
- Howard Hughes Medical Institute, MIT, Cambridge, MA, USA
| | - Alejo Efeyan
- Metabolism and Cell Signaling Laboratory, Spanish National Cancer Research Centre (CNIO), Madrid, Spain.
- Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA, USA.
- Department of Biology, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA.
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5
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Valente LJ, Tarangelo A, Li AM, Naciri M, Raj N, Boutelle AM, Li Y, Mello SS, Bieging-Rolett K, DeBerardinis RJ, Ye J, Dixon SJ, Attardi LD. p53 deficiency triggers dysregulation of diverse cellular processes in physiological oxygen. J Cell Biol 2021; 219:152074. [PMID: 32886745 PMCID: PMC7594498 DOI: 10.1083/jcb.201908212] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 06/17/2020] [Accepted: 07/28/2020] [Indexed: 12/20/2022] Open
Abstract
The mechanisms by which TP53, the most frequently mutated gene in human cancer, suppresses tumorigenesis remain unclear. p53 modulates various cellular processes, such as apoptosis and proliferation, which has led to distinct cellular mechanisms being proposed for p53-mediated tumor suppression in different contexts. Here, we asked whether during tumor suppression p53 might instead regulate a wide range of cellular processes. Analysis of mouse and human oncogene-expressing wild-type and p53-deficient cells in physiological oxygen conditions revealed that p53 loss concurrently impacts numerous distinct cellular processes, including apoptosis, genome stabilization, DNA repair, metabolism, migration, and invasion. Notably, some phenotypes were uncovered only in physiological oxygen. Transcriptomic analysis in this setting highlighted underappreciated functions modulated by p53, including actin dynamics. Collectively, these results suggest that p53 simultaneously governs diverse cellular processes during transformation suppression, an aspect of p53 function that would provide a clear rationale for its frequent inactivation in human cancer.
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Affiliation(s)
- Liz J Valente
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA
| | - Amy Tarangelo
- Department of Biology, Stanford University, Stanford, CA
| | - Albert Mao Li
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA
| | - Marwan Naciri
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA.,École Normale Supérieure de Lyon, Université Claude Bernard Lyon I, Université de Lyon, Lyon, France
| | - Nitin Raj
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA
| | - Anthony M Boutelle
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA
| | - Yang Li
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA
| | - Stephano Spano Mello
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA.,Department of Biomedical Genetics, University of Rochester Medical Center, Rochester, NY
| | - Kathryn Bieging-Rolett
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA
| | - Ralph J DeBerardinis
- Children's Medical Center Research Institute, University of Texas Southwestern Medical Center, Dallas, TX.,Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX
| | - Jiangbin Ye
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA
| | - Scott J Dixon
- Department of Biology, Stanford University, Stanford, CA
| | - Laura D Attardi
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA.,Department of Genetics, Stanford University School of Medicine, Stanford, CA.,Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA
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6
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Bostan M, Petrică-Matei GG, Radu N, Hainarosie R, Stefanescu CD, Diaconu CC, Roman V. The Effect of Resveratrol or Curcumin on Head and Neck Cancer Cells Sensitivity to the Cytotoxic Effects of Cisplatin. Nutrients 2020; 12:nu12092596. [PMID: 32859062 PMCID: PMC7551591 DOI: 10.3390/nu12092596] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/20/2020] [Accepted: 08/21/2020] [Indexed: 12/20/2022] Open
Abstract
Natural compounds can modulate all three major phases of carcinogenesis. The role of the natural compounds such as resveratrol (RSV) and curcumin (CRM) in modulation of anticancer potential of platinum-based drugs (CisPt) is still a topic of considerable debate. In order to enhance head and neck cancer (HNSCC) cells’ sensitivity to the cytotoxic effects of CisPt combined treatments with RSV or CRM were used. The study aim was to evaluate how the RSV or CRM associated to CisPt treatment modulated some cellular processes such as proliferation, P21 gene expression, apoptotic process, and cell cycle development in HNSCC tumor cell line (PE/CA-PJ49) compared to a normal cell line (HUVEC). The results showed that RSV or CRM treatment affected the viability of tumor cells more than normal cells. These natural compounds act against proliferation and sustain the effects of cisplatin by cell cycle arrest, induction of apoptosis and amplification of P21 expression in tumor cells. In conclusion, using RSV or CRM as adjuvants in CisPt therapy might have a beneficial effect by supporting the effects induced by CisPt.
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Affiliation(s)
- Marinela Bostan
- Center of Immunology, Stefan S. Nicolau’ Institute of Virology, 030304 Bucharest, Romania;
- Department of Immunology, Victor Babeș’ National Institute of Pathology, 050096 Bucharest, Romania
| | | | - Nicoleta Radu
- Department of Biotechnology, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 011464 Βucharest, Romania;
- Biotechnology Department, National Institute for Chemistry and Petrochemistry R&D of Bucharest, 060021 Bucharest, Romania
| | - Razvan Hainarosie
- Otorhinolaryngology and Head and Neck Surgery Department-University of Medicine and Pharmacy “Carol Davila”, 020021 Bucharest, Romania; (R.H.); (C.D.S.)
| | - Cristian Dragos Stefanescu
- Otorhinolaryngology and Head and Neck Surgery Department-University of Medicine and Pharmacy “Carol Davila”, 020021 Bucharest, Romania; (R.H.); (C.D.S.)
| | - Carmen Cristina Diaconu
- Department of Cellular and Molecular Pathology, Stefan S. Nicolau Institute of Virology, 030304 Bucharest, Romania
- Correspondence: (C.C.D.); (V.R.)
| | - Viviana Roman
- Center of Immunology, Stefan S. Nicolau’ Institute of Virology, 030304 Bucharest, Romania;
- Correspondence: (C.C.D.); (V.R.)
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Fusée LTS, Marín M, Fåhraeus R, López I. Alternative Mechanisms of p53 Action During the Unfolded Protein Response. Cancers (Basel) 2020; 12:cancers12020401. [PMID: 32050651 PMCID: PMC7072472 DOI: 10.3390/cancers12020401] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 12/17/2022] Open
Abstract
The tumor suppressor protein p53 orchestrates cellular responses to a vast number of stresses, with DNA damage and oncogenic activation being some of the best described. The capacity of p53 to control cellular events such as cell cycle progression, DNA repair, and apoptosis, to mention some, has been mostly linked to its role as a transcription factor. However, how p53 integrates different signaling cascades to promote a particular pathway remains an open question. One way to broaden its capacity to respond to different stimuli is by the expression of isoforms that can modulate the activities of the full-length protein. One of these isoforms is p47 (p53/47, Δ40p53, p53ΔN40), an alternative translation initiation variant whose expression is specifically induced by the PERK kinase during the Unfolded Protein Response (UPR) following Endoplasmic Reticulum stress. Despite the increasing knowledge on the p53 pathway, its activity when the translation machinery is globally suppressed during the UPR remains poorly understood. Here, we focus on the expression of p47 and we propose that the alternative initiation of p53 mRNA translation offers a unique condition-dependent mechanism to differentiate p53 activity to control cell homeostasis during the UPR. We also discuss how the manipulation of these processes may influence cancer cell physiology in light of therapeutic approaches.
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Affiliation(s)
| | - Mónica Marín
- Biochemistry-Molecular Biology, Faculty of Science, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
| | - Robin Fåhraeus
- INSERM U1162, 27 rue Juliette Dodu, 75010 Paris, France
- RECAMO, Masaryk Memorial Cancer Institute, Zluty kopec 7, 656 53 Brno, Czech Republic
- Department of Medical Biosciences, Umeå University, 90185 Umeå, Sweden
- ICCVS, University of Gdańsk, Science, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Ignacio López
- Biochemistry-Molecular Biology, Faculty of Science, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
- Correspondence: ; Tel.: +598-25252095
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Nag D, Bhanja P, Riha R, Sanchez-Guerrero G, Kimler BF, Tsue TT, Lominska C, Saha S. Auranofin Protects Intestine against Radiation Injury by Modulating p53/p21 Pathway and Radiosensitizes Human Colon Tumor. Clin Cancer Res 2019; 25:4791-4807. [DOI: 10.1158/1078-0432.ccr-18-2751] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 12/23/2018] [Accepted: 03/25/2019] [Indexed: 02/06/2023]
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9
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Li X, Huang J, Luo X, Yang D, Yin X, Peng W, Bi C, Ren G, Xiang T. Paired box 5 is a novel marker of breast cancers that is frequently downregulated by methylation. Int J Biol Sci 2018; 14:1686-1695. [PMID: 30416383 PMCID: PMC6216036 DOI: 10.7150/ijbs.27599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 07/15/2018] [Indexed: 12/20/2022] Open
Abstract
Identifying markers for breast cancer is important for both diagnosis and the design of treatment strategies. Recent studies have implicated Paired box 5 (PAX5) as a suppressor in various cancer types, where it is silenced by hypermethylation. However, determining the role of PAX5 in breast cancer requires further study, and the relationship between PAX5 methylation and breast cancer remains unclear. In this study, we found that PAX5 expression was frequently silenced or reduced by methylation in breast cancer cell lines as well as in breast cancer tissues. Restoring expression of PAX5 in breast cancer cells led to tumor suppression through inhibited proliferation and invasion, which resulted from modulation of the cell cycle and altered vascular endothelial growth factor (VEGF) expression. Most importantly, we found that PAX5 methylation status in breast cancer tissues was significantly correlated with patients' age, estrogen receptor (ER) status, progesterone receptor (PR) status, indicating that PAX5 could serve as a marker for breast cancer diagnosis and treatment strategy design.
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Affiliation(s)
- Xia Li
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Department of Oncology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jianbo Huang
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Department of Endocrine and Breast Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xinrong Luo
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Department of Endocrine and Breast Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Dejuan Yang
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xuedong Yin
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Department of Endocrine and Breast Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Weiyan Peng
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Can Bi
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Guosheng Ren
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Department of Endocrine and Breast Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Tingxiu Xiang
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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10
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Ubiquitin-conjugating enzyme E2T (UBE2T) and denticleless protein homolog (DTL) are linked to poor outcome in breast and lung cancers. Sci Rep 2017; 7:17530. [PMID: 29235520 PMCID: PMC5727519 DOI: 10.1038/s41598-017-17836-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 11/27/2017] [Indexed: 12/13/2022] Open
Abstract
Protein ubiquitination and degradation represent druggable vulnerabilities of cancer cells. We used gene expression and functional annotation analyses to identify genes in the ubiquitin pathway which are differentially expressed between normal breast and basal-like tumors. With this approach we identified 16 ubiquitin related genes overexpressed in basal-like breast cancers compared with normal breast. We then explored the association between these genes and outcomes using the KMPlotter online tool. Two genes, the ubiquitin-conjugating enzyme E2T (UBE2T) and the denticleless protein homolog (DTL) were overexpressed and linked with detrimental outcome in basal-like and luminal breast cancer patients. Furthermore, we found that UBE2T and DTL were amplified in around 12% of breast tumors based on data contained at cBioportal. In non-small cell lung adenocarcinomas, UBE2T and DTL were also amplified in around 7% of cases and linked with disease recurrence after surgical resection. No significant molecular alterations or a clear trend for clinical outcome was observed for these genes in ovarian serous cystadenocarcinoma, esophagus-stomach cancer or non-small squamous cell carcinoma. Our data suggest that UBE2T and DTL may have a role in the pathophysiology of breast and lung tumors, opening avenues for future clinical evaluation of agents targeting those proteins or their pathways.
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11
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Fenelon JC, Shaw G, Frankenberg SR, Murphy BD, Renfree MB. Embryo arrest and reactivation: potential candidates controlling embryonic diapause in the tammar wallaby and mink†. Biol Reprod 2017; 96:877-894. [DOI: 10.1093/biolre/iox019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 03/29/2017] [Indexed: 12/13/2022] Open
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12
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Costa DCF, de Oliveira GAP, Cino EA, Soares IN, Rangel LP, Silva JL. Aggregation and Prion-Like Properties of Misfolded Tumor Suppressors: Is Cancer a Prion Disease? Cold Spring Harb Perspect Biol 2016; 8:cshperspect.a023614. [PMID: 27549118 DOI: 10.1101/cshperspect.a023614] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Prion diseases are disorders that share several characteristics that are typical of many neurodegenerative diseases. Recently, several studies have extended the prion concept to pathological aggregation in malignant tumors involving misfolded p53, a tumor-suppressor protein. The aggregation of p53 and its coaggregation with p53 family members, p63 and p73, have been shown. Certain p53 mutants exert a dominant-negative regulatory effect on wild-type (WT) p53. The basis for this dominant-negative effect is that amyloid-like mutant p53 converts WT p53 into an aggregated species, leading to a gain-of-function (GoF) phenotype and the loss of its tumor-suppressor function. Recently, it was shown that p53 aggregates can be internalized by cells and can coaggregate with endogenous p53, corroborating the prion-like properties of p53 aggregates. The prion-like behavior of oncogenic p53 mutants provides an explanation for its dominant-negative and GoF properties, including the high metastatic potential of cancer cells carrying p53 mutations. The inhibition of p53 aggregation appears to represent a promising target for therapeutic intervention in patients with malignant tumors.
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Affiliation(s)
- Danielly C F Costa
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil Instituto Nacional de Ciência e Tecnologia (INCT) de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil Instituto de Nutrição, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ 20550-013, Brazil
| | - Guilherme A P de Oliveira
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil Instituto Nacional de Ciência e Tecnologia (INCT) de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | - Elio A Cino
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil Instituto Nacional de Ciência e Tecnologia (INCT) de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | - Iaci N Soares
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil Instituto Nacional de Ciência e Tecnologia (INCT) de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | - Luciana P Rangel
- Instituto Nacional de Ciência e Tecnologia (INCT) de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | - Jerson L Silva
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil Instituto Nacional de Ciência e Tecnologia (INCT) de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
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López I, Tournillon AS, Nylander K, Fåhraeus R. p53-mediated control of gene expression via mRNA translation during Endoplasmic Reticulum stress. Cell Cycle 2016; 14:3373-8. [PMID: 26397130 PMCID: PMC4825612 DOI: 10.1080/15384101.2015.1090066] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
p53 is activated by different stress and damage pathways and regulates cell biological responses including cell cycle arrest, repair pathways, apoptosis and senescence. Following DNA damage, the levels of p53 increase and via binding to target gene promoters, p53 induces expression of multiple genes including p21CDKN1A and mdm2. The effects of p53 on gene expression during the DNA damage response are well mimicked by overexpressing p53 under normal conditions. However, stress to the Endoplasmic Reticulum (ER) and the consequent Unfolded Protein Response (UPR) leads to the induction of the p53/47 isoform that lacks the first 40 aa of p53 and to an active suppression of p21CDKN1A transcription and mRNA translation. We now show that during ER stress p53 also suppresses MDM2 protein levels via a similar mechanism. These observations not only raise questions about the physiological role of MDM2 during ER stress but it also reveals a new facet of p53 as a repressor toward 2 of its major target genes during the UPR. As suppression of p21CDKN1A and MDM2 protein synthesis is mediated via their coding sequences, it raises the possibility that p53 controls mRNA translation via a common mechanism that might play an important role in how p53 regulates gene expression during the UPR, as compared to the transcription-dependent gene regulation taking place during the DNA damage response.
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Affiliation(s)
- Ignacio López
- a Équipe Labellisée Ligue Contre le Cancer; Université Paris 7; INSERM UMR 1162 "Génomique fonctionnelle des tumeurs solides" ; Paris , France
| | - Anne-Sophie Tournillon
- a Équipe Labellisée Ligue Contre le Cancer; Université Paris 7; INSERM UMR 1162 "Génomique fonctionnelle des tumeurs solides" ; Paris , France
| | - Karin Nylander
- b Department of Medical Biosciences ; Umeå University ; Umeå , Sweden
| | - Robin Fåhraeus
- a Équipe Labellisée Ligue Contre le Cancer; Université Paris 7; INSERM UMR 1162 "Génomique fonctionnelle des tumeurs solides" ; Paris , France ,b Department of Medical Biosciences ; Umeå University ; Umeå , Sweden.,c RECAMO; Masaryk Memorial Cancer Institute ; Brno , Czech Republic
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Salari Fanoodi T, Motalleb G, Yegane Moghadam A, Talaee R. p21 Gene Expression Evaluation in Esophageal Cancer Patients. Gastrointest Tumors 2015. [DOI: 10.1159/000441901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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15
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de Oliveira GAP, Rangel LP, Costa DC, Silva JL. Misfolding, Aggregation, and Disordered Segments in c-Abl and p53 in Human Cancer. Front Oncol 2015; 5:97. [PMID: 25973395 PMCID: PMC4413674 DOI: 10.3389/fonc.2015.00097] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 04/10/2015] [Indexed: 01/31/2023] Open
Abstract
The current understanding of the molecular mechanisms that lead to cancer is not sufficient to explain the loss or gain of function in proteins related to tumorigenic processes. Among them, more than 100 oncogenes, 20-30 tumor-suppressor genes, and hundreds of genes participating in DNA repair and replication have been found to play a role in the origins of cancer over the last 25 years. The phosphorylation of serine, threonine, or tyrosine residues is a critical step in cellular growth and development and is achieved through the tight regulation of protein kinases. Phosphorylation plays a major role in eukaryotic signaling as kinase domains are found in 2% of our genes. The deregulation of kinase control mechanisms has disastrous consequences, often leading to gains of function, cell transformation, and cancer. The c-Abl kinase protein is one of the most studied targets in the fight against cancer and is a hotspot for drug development because it participates in several solid tumors and is the hallmark of chronic myelogenous leukemia. Tumor suppressors have the opposite effects. Their fundamental role in the maintenance of genomic integrity has awarded them a role as the guardians of DNA. Among the tumor suppressors, p53 is the most studied. The p53 protein has been shown to be a transcription factor that recognizes and binds to specific DNA response elements and activates gene transcription. Stress triggered by ionizing radiation or other mutagenic events leads to p53 phosphorylation and cell-cycle arrest, senescence, or programed cell death. The p53 gene is the most frequently mutated gene in cancer. Mutations in the DNA-binding domain are classified as class I or class II depending on whether substitutions occur in the DNA contact sites or in the protein core, respectively. Tumor-associated p53 mutations often lead to the loss of protein function, but recent investigations have also indicated gain-of-function mutations. The prion-like aggregation of mutant p53 is associated with loss-of-function, dominant-negative, and gain-of-function effects. In the current review, we focused on the most recent insights into the protein structure and function of the c-Abl and p53 proteins that will provide us guidance to understand the loss and gain of function of these misfolded tumor-associated proteins.
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Affiliation(s)
- Guilherme A. P. de Oliveira
- Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Instituto Nacional de Biologia Estrutural e Bioimagem, Centro Nacional de Ressonância Magnética Nuclear Jiri Jonas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luciana P. Rangel
- Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Instituto Nacional de Biologia Estrutural e Bioimagem, Centro Nacional de Ressonância Magnética Nuclear Jiri Jonas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Danielly C. Costa
- Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Instituto Nacional de Biologia Estrutural e Bioimagem, Centro Nacional de Ressonância Magnética Nuclear Jiri Jonas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jerson L. Silva
- Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Instituto Nacional de Biologia Estrutural e Bioimagem, Centro Nacional de Ressonância Magnética Nuclear Jiri Jonas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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16
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Chong KH, Samarasinghe S, Kulasiri D. Mathematical modelling of p53 basal dynamics and DNA damage response. Math Biosci 2015; 259:27-42. [DOI: 10.1016/j.mbs.2014.10.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 10/23/2014] [Accepted: 10/31/2014] [Indexed: 02/06/2023]
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17
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Endoplasmic reticulum stress sensitizes cells to DNA damage-induced apoptosis through p53-dependent suppression of p21CDKN1A. Nat Commun 2014; 5:5067. [DOI: 10.1038/ncomms6067] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 08/25/2014] [Indexed: 12/19/2022] Open
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18
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Bazhanova ED, Popovich IG, Anisimov VN. Expression of Werner syndrome gene in hypothalamic neurons in physiological aging. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2014; 453:342-4. [PMID: 24385166 DOI: 10.1134/s0012496613060100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Indexed: 11/23/2022]
Affiliation(s)
- E D Bazhanova
- Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, 194223, Russia
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Ferrándiz N, Caraballo JM, García-Gutierrez L, Devgan V, Rodriguez-Paredes M, Lafita MC, Bretones G, Quintanilla A, Muñoz-Alonso MJ, Blanco R, Reyes JC, Agell N, Delgado MD, Dotto GP, León J. p21 as a transcriptional co-repressor of S-phase and mitotic control genes. PLoS One 2012; 7:e37759. [PMID: 22662213 PMCID: PMC3360621 DOI: 10.1371/journal.pone.0037759] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Accepted: 04/23/2012] [Indexed: 12/27/2022] Open
Abstract
It has been previously described that p21 functions not only as a CDK inhibitor but also as a transcriptional co-repressor in some systems. To investigate the roles of p21 in transcriptional control, we studied the gene expression changes in two human cell systems. Using a human leukemia cell line (K562) with inducible p21 expression and human primary keratinocytes with adenoviral-mediated p21 expression, we carried out microarray-based gene expression profiling. We found that p21 rapidly and strongly repressed the mRNA levels of a number of genes involved in cell cycle and mitosis. One of the most strongly down-regulated genes was CCNE2 (cyclin E2 gene). Mutational analysis in K562 cells showed that the N-terminal region of p21 is required for repression of gene expression of CCNE2 and other genes. Chromatin immunoprecipitation assays indicated that p21 was bound to human CCNE2 and other p21-repressed genes gene in the vicinity of the transcription start site. Moreover, p21 repressed human CCNE2 promoter-luciferase constructs in K562 cells. Bioinformatic analysis revealed that the CDE motif is present in most of the promoters of the p21-regulated genes. Altogether, the results suggest that p21 exerts a repressive effect on a relevant number of genes controlling S phase and mitosis. Thus, p21 activity as inhibitor of cell cycle progression would be mediated not only by the inhibition of CDKs but also by the transcriptional down-regulation of key genes.
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Affiliation(s)
- Nuria Ferrándiz
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
| | - Juan M. Caraballo
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
| | - Lucía García-Gutierrez
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
| | - Vikram Devgan
- Cutaneous Biology Research Center, Massachusetts General Hospital, Charlestown, Massachussetts, United States of America
| | - Manuel Rodriguez-Paredes
- Centro Andaluz de Biología Molecular y Medicina Regenerativa (CABIMER), CSIC, Américo Vespucio s/n, Sevilla, Spain
| | - M. Carmen Lafita
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
| | - Gabriel Bretones
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
| | - Andrea Quintanilla
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
| | - M. Jose Muñoz-Alonso
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
- Instituto de Investigaciones Biomédicas Alberto Sols, CSIC, Madrid, Spain
| | - Rosa Blanco
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
| | - Jose C. Reyes
- Centro Andaluz de Biología Molecular y Medicina Regenerativa (CABIMER), CSIC, Américo Vespucio s/n, Sevilla, Spain
| | - Neus Agell
- Departament de Biologia Cellular, Immunologia i Neurociències, Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain
| | - M. Dolores Delgado
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
| | - G. Paolo Dotto
- Cutaneous Biology Research Center, Massachusetts General Hospital, Charlestown, Massachussetts, United States of America
- Department of Biochemistry, University of Lausanne, Epalinges, Switzerland
| | - Javier León
- Departamento de Biología Molecular, Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Universidad de Cantabria–CSIC–SODERCAN, Santander, Spain
- * E-mail:
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Sullivan JM, Jeffords LB, Lee CL, Rodrigues R, Ma Y, Kirsch DG. p21 protects "Super p53" mice from the radiation-induced gastrointestinal syndrome. Radiat Res 2011; 177:307-10. [PMID: 22165824 DOI: 10.1667/rr2545.1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Exposure of the gastrointestinal (GI) tract to high doses of radiation can lead to lethality from the GI syndrome. Although the molecular mechanism regulating the GI syndrome remains to be fully defined, we have recently demonstrated that p53 within the GI epithelial cells controls the radiation-induced GI syndrome. Mice lacking p53 in the GI epithelium were sensitized to the GI syndrome, while transgenic mice with one additional copy of p53 called "Super p53" mice were protected from the GI syndrome. Here, we crossed Super p53 mice to p21⁻/⁻ mice that lack the cyclin-dependent kinase inhibitor p21. Super p53; p21⁻/⁻ mice were sensitized to the GI syndrome compared to Super p53 mice that retain one p21 allele. In addition, mice lacking p21 were not protected from the GI syndrome with one extra copy of p53. These results suggest that p21 protects Super p53 mice from the GI syndrome.
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Affiliation(s)
- Julie M Sullivan
- Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina, USA
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21
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Distinct p53 transcriptional programs dictate acute DNA-damage responses and tumor suppression. Cell 2011; 145:571-83. [PMID: 21565614 DOI: 10.1016/j.cell.2011.03.035] [Citation(s) in RCA: 400] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2010] [Revised: 02/03/2011] [Accepted: 03/18/2011] [Indexed: 12/17/2022]
Abstract
The molecular basis for p53-mediated tumor suppression remains unclear. Here, to elucidate mechanisms of p53 tumor suppression, we use knockin mice expressing an allelic series of p53 transcriptional activation mutants. Microarray analysis reveals that one mutant, p53(25,26), is severely compromised for transactivation of most p53 target genes, and, moreover, p53(25,26) cannot induce G(1)-arrest or apoptosis in response to acute DNA damage. Surprisingly, p53(25,26) retains robust activity in senescence and tumor suppression, indicating that efficient transactivation of the majority of known p53 targets is dispensable for these pathways. In contrast, the transactivation-dead p53(25,26,53,54) mutant cannot induce senescence or inhibit tumorigenesis, like p53 nullizygosity. Thus, p53 transactivation is essential for tumor suppression but, intriguingly, in association with a small set of novel p53 target genes. Together, our studies distinguish the p53 transcriptional programs involved in acute DNA-damage responses and tumor suppression-a critical goal for designing therapeutics that block p53-dependent side effects of chemotherapy without compromising p53 tumor suppression.
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Young NP, Crowley D, Jacks T. Uncoupling cancer mutations reveals critical timing of p53 loss in sarcomagenesis. Cancer Res 2011; 71:4040-7. [PMID: 21512139 DOI: 10.1158/0008-5472.can-10-4563] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
It is well accepted that cancer develops following the sequential accumulation of multiple alterations, but how the temporal order of events affects tumor initiation and/or progression remains largely unknown. Here, we describe a mouse model that allows for temporally distinct cancer mutations. By integrating a Flp-inducible allele of K-ras(G12D) with established methods for Cre-mediated p53 deletion, we were able to separately control the mutation of these commonly associated cancer genes in vitro and in vivo. We show that delaying p53 deletion relative to K-ras(G12D) activation reduced tumor burden in a mouse model of soft-tissue sarcoma, suggesting that p53 strongly inhibits very early steps of transformation in the muscle. Furthermore, using in vivo RNA interference, we implicate the p53 target gene p21 as a critical mediator in this process, highlighting cell-cycle arrest as an extremely potent tumor suppressor mechanism.
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Affiliation(s)
- Nathan P Young
- Koch Institute for Integrative Cancer Research and Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Zhang X, Zhang Q, Zhang J, Qiu L, Yan SS, Feng J, Sun Y, Huang X, Lu KH, Li Z. FATS is a transcriptional target of p53 and associated with antitumor activity. Mol Cancer 2010; 9:244. [PMID: 20843368 PMCID: PMC2946289 DOI: 10.1186/1476-4598-9-244] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Accepted: 09/16/2010] [Indexed: 11/18/2022] Open
Abstract
Frequent mutations of p53 in human cancers exemplify its crucial role as a tumor suppressor transcription factor, and p21, a transcriptional target of p53, plays a central role in surveillance of cell-cycle checkpoints. Our previous study has shown that FATS stabilize p21 to preserve genome integrity. In this study we identified a novel transcript variant of FATS (GenBank: GQ499374) through screening a cDNA library from mouse testis, which uncovered the promoter region of mouse FATS. Mouse FATS was highly expressed in testis. The p53-responsive elements existed in proximal region of both mouse and human FATS promoters. Functional study indicated that the transcription of FATS gene was activated by p53, whereas such effect was abolished by site-directed mutagenesis in the p53-RE of FATS promoter. Furthermore, the expression of FATS increased upon DNA damage in a p53-dependent manner. FATS expression was silent or downregulated in human cancers, and overexpression of FATS suppressed tumorigenicity in vivo independently of p53. Our results reveal FATS as a p53-regulated gene to monitor genomic stability.
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Affiliation(s)
- Xifeng Zhang
- Department of Biochemistry and Molecular Biology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
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Li Z, Zhang Q, Mao JH, Weise A, Mrasek K, Fan X, Zhang X, Liehr T, Lu KH, Balmain A, Cai WW. An HDAC1-binding domain within FATS bridges p21 turnover to radiation-induced tumorigenesis. Oncogene 2010; 29:2659-71. [DOI: 10.1038/onc.2010.19] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Ferrandiz N, Caraballo JM, Albajar M, Gomez-Casares MT, Lopez-Jorge CE, Blanco R, Delgado MD, Leon J. p21(Cip1) confers resistance to imatinib in human chronic myeloid leukemia cells. Cancer Lett 2009; 292:133-9. [PMID: 20042273 DOI: 10.1016/j.canlet.2009.11.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Revised: 11/11/2009] [Accepted: 11/27/2009] [Indexed: 11/24/2022]
Abstract
Imatinib is a Bcr-Abl inhibitor used as first-line therapy of chronic myeloid leukemia (CML). p21(Cip1), initially described as a cell cycle inhibitor, also protects from apoptosis in some models. We describe that imatinib down-regulates p21(Cip1) expression in CML cells. Using K562 cells with inducible p21 expression and transient transfections we found that p21 confers partial resistance to imatinib-induced apoptosis. This protection is not related to the G2-arrest provoked by p21, a decrease in the imatinib activity against Bcr-Abl or a cytoplasmic localization of p21. The results suggest an involvement of p21(Cip1) in the response to imatinib in CML.
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Affiliation(s)
- Nuria Ferrandiz
- Departamento de Biología Molecular, Facultad de Medicina, Instituto de Biomedicina y Biotecnología de Cantabria, Universidad de Cantabria-CSIC-IDICAN, Santander, Spain
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Abstract
One of the main engines that drives cellular transformation is the loss of proper control of the mammalian cell cycle. The cyclin-dependent kinase inhibitor p21 (also known as p21WAF1/Cip1) promotes cell cycle arrest in response to many stimuli. It is well positioned to function as both a sensor and an effector of multiple anti-proliferative signals. This Review focuses on recent advances in our understanding of the regulation of p21 and its biological functions with emphasis on its p53-independent tumour suppressor activities and paradoxical tumour-promoting activities, and their implications in cancer.
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Affiliation(s)
- Tarek Abbas
- Department of Biochemistry and Molecular Genetics, University of Virginia, School of Medicine, 1340 Jefferson Park Avenue, Charlottesville, VA 22908, USA.
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Ferrandiz N, Martin-Perez J, Blanco R, Donertas D, Weber A, Eilers M, Dotto P, Delgado MD, Leon J. HCT116 cells deficient in p21Waf1 are hypersensitive to tyrosine kinase inhibitors and adriamycin through a mechanism unrelated to p21 and dependent on p53. DNA Repair (Amst) 2009; 8:390-9. [DOI: 10.1016/j.dnarep.2008.12.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2008] [Revised: 11/26/2008] [Accepted: 12/02/2008] [Indexed: 11/26/2022]
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Overexpression of SnoN/SkiL, amplified at the 3q26.2 locus, in ovarian cancers: a role in ovarian pathogenesis. Mol Oncol 2008; 2:164-81. [PMID: 19383336 DOI: 10.1016/j.molonc.2008.05.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2007] [Revised: 05/01/2008] [Accepted: 05/06/2008] [Indexed: 01/05/2023] Open
Abstract
High-resolution array comparative genomic hybridization of 235 serous epithelial ovarian cancers demonstrated a regional increase at 3q26.2 encompassing SnoN/SkiL, a coregulator of SMAD/TGFbeta signaling. SnoN RNA transcripts were elevated in approximately 80% of advanced stage serous epithelial ovarian cancers. In both immortalized normal (TIOSE) and ovarian carcinoma cell lines (OVCA), SnoN RNA levels were increased by TGFbeta stimulation and altered by LY294002 and JNK II inhibitor treatment suggesting that the PI3K and JNK signaling pathways may regulate TGFbeta-induced increases in SnoN RNA. In TIOSE, SnoN protein levels were reduced 15min post TGFbeta-stimulation, likely by proteosome-mediated degradation. In contrast, in OVCA, SnoN levels were elevated 3h post-stimulation potentially as a result of inhibition of the proteosome. To elucidate the role of SnoN in ovarian tumorigenesis, we explored the effects of both increasing and decreasing SnoN levels. In both TIOSE and OVCA, SnoN siRNA decreased cell growth between 20 and 50% concurrent with increased p21 levels. In TIOSE, transient expression of SnoN repressed TGFbeta induction of PAI-1 promoters with little effect on the p21 promoter or resultant cell growth. In contrast to the effects of transient expression, stable expression of SnoN in TIOSE led to growth arrest through induction of senescence. Collectively, these results implicate SnoN levels in multiple roles during ovarian carcinogenesis: promoting cellular proliferation in ovarian cancer cells and as a positive mediator of cell cycle arrest and senescence in non-transformed ovarian epithelial cells.
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