1
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Zamudio Díaz DF, Klein AL, Guttmann M, Zwicker P, Busch L, Kröger M, Klose H, Rohn S, Schleusener J, Meinke MC. Skin optical properties from 200 to 300 nm support far UV-C skin-safety in vivo. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2023; 247:112784. [PMID: 37690371 DOI: 10.1016/j.jphotobiol.2023.112784] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/07/2023] [Accepted: 09/01/2023] [Indexed: 09/12/2023]
Abstract
The growing threat of multi-drug resistant pathogens and airborne microbial diseases has highlighted the need to improve or develop novel disinfection methods for clinical environments. Conventional ultraviolet C (UV-C) lamps effectively inactivate microorganisms but are harmful to human skin and eyes upon exposure. The use of new 233 nm far UV-C LEDs as an antiseptic can overcome those limitations. In this research, the light penetration into the skin was elucidated for the UV-C region (<300 nm) by measuring the scattering and absorption of skin layers and inverse Monte Carlo simulation, and further confirmed by the first clinical pilot trial in which healthy volunteers were irradiated with a dose of 60 mJ/cm2 at 233 nm. The radiation is strongly absorbed in the stratum corneum, resulting in minimal skin damage without inducing inflammatory responses. The results suggest that 233 nm far UV-C light emitting diodes (LEDs) could effectively inactivate microorganisms, while being safe and soft for the skin.
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Affiliation(s)
- Daniela F Zamudio Díaz
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venereology and Allergology, Charitéplatz 1, 10117 Berlin, Germany; Technische Universität Berlin, Institute of Food Technology and Food Chemistry, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | - Anna Lena Klein
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venereology and Allergology, Charitéplatz 1, 10117 Berlin, Germany
| | - Martin Guttmann
- Ferdinand-Braun-Institut (FBH), Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany
| | - Paula Zwicker
- University Medicine Greifswald, Institute of Hygiene and Environmental Medicine, Ferdinand-Sauerbruch-Str., 17475 Greifswald, Germany
| | - Loris Busch
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venereology and Allergology, Charitéplatz 1, 10117 Berlin, Germany
| | - Marius Kröger
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venereology and Allergology, Charitéplatz 1, 10117 Berlin, Germany
| | - Holger Klose
- artMED Private Practice for Plastic and Aesthetic Surgery, Friedrichstraße 61, 10117 Berlin, Germany
| | - Sascha Rohn
- Technische Universität Berlin, Institute of Food Technology and Food Chemistry, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | - Johannes Schleusener
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venereology and Allergology, Charitéplatz 1, 10117 Berlin, Germany
| | - Martina C Meinke
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venereology and Allergology, Charitéplatz 1, 10117 Berlin, Germany.
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2
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Pant V, Sun C, Lozano G. Tissue specificity and spatio-temporal dynamics of the p53 transcriptional program. Cell Death Differ 2023; 30:897-905. [PMID: 36755072 PMCID: PMC10070629 DOI: 10.1038/s41418-023-01123-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 10/30/2022] [Accepted: 11/15/2022] [Indexed: 02/10/2023] Open
Abstract
Transcription factors regulate hundreds of genes and p53 is no exception. As a stress responsive protein, p53 transactivates an array of downstream targets which define its role in maintaining physiological functions of cells/tissues. Despite decades of studies, our understanding of the p53 in vivo transcriptional program is still incomplete. Here we discuss some of the physiological stressors that activate p53, the pathological and physiological implications of p53 activation and the molecular profiling of the p53 transcriptional program in maintaining tissue homeostasis. We argue that the p53 transcriptional program is spatiotemporally regulated in a tissue-specific manner and define a p53 target signature that faithfully depicts p53 activity. We further emphasize that additional in vivo studies are needed to refine the p53 transactivation profile to harness it for therapeutic purposes.
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Affiliation(s)
- Vinod Pant
- Department of Genetics, 1515 Holcombe Blvd, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Chang Sun
- Department of Genetics, 1515 Holcombe Blvd, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Guillermina Lozano
- Department of Genetics, 1515 Holcombe Blvd, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
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3
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Sfaxi R, Biswas B, Boldina G, Cadix M, Servant N, Chen H, Larson DR, Dutertre M, Robert C, Vagner S. Post-transcriptional polyadenylation site cleavage maintains 3'-end processing upon DNA damage. EMBO J 2023; 42:e112358. [PMID: 36762421 PMCID: PMC10068322 DOI: 10.15252/embj.2022112358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 02/11/2023] Open
Abstract
The recognition of polyadenylation signals (PAS) in eukaryotic pre-mRNAs is usually coupled to transcription termination, occurring while pre-mRNA is chromatin-bound. However, for some pre-mRNAs, this 3'-end processing occurs post-transcriptionally, i.e., through a co-transcriptional cleavage (CoTC) event downstream of the PAS, leading to chromatin release and subsequent PAS cleavage in the nucleoplasm. While DNA-damaging agents trigger the shutdown of co-transcriptional chromatin-associated 3'-end processing, specific compensatory mechanisms exist to ensure efficient 3'-end processing for certain pre-mRNAs, including those that encode proteins involved in the DNA damage response, such as the tumor suppressor p53. We show that cleavage at the p53 polyadenylation site occurs in part post-transcriptionally following a co-transcriptional cleavage event. Cells with an engineered deletion of the p53 CoTC site exhibit impaired p53 3'-end processing, decreased mRNA and protein levels of p53 and its transcriptional target p21, and altered cell cycle progression upon UV-induced DNA damage. Using a transcriptome-wide analysis of PAS cleavage, we identify additional pre-mRNAs whose PAS cleavage is maintained in response to UV irradiation and occurring post-transcriptionally. These findings indicate that CoTC-type cleavage of pre-mRNAs, followed by PAS cleavage in the nucleoplasm, allows certain pre-mRNAs to escape 3'-end processing inhibition in response to UV-induced DNA damage.
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Affiliation(s)
- Rym Sfaxi
- Institut Curie, PSL Research University, CNRS UMR3348, INSERM U1278, Orsay, France.,Université Paris Sud, Université Paris-Saclay, CNRS UMR3348, INSERM U1278, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Biswendu Biswas
- Institut Curie, PSL Research University, CNRS UMR3348, INSERM U1278, Orsay, France.,Université Paris Sud, Université Paris-Saclay, CNRS UMR3348, INSERM U1278, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France.,INSERM U981, Gustave Roussy, Gustave Roussy, Villejuif, France.,Université Paris Sud, Université Paris-Saclay, Kremlin-Bicêtre, France
| | - Galina Boldina
- Institut Curie, PSL Research University, CNRS UMR3348, INSERM U1278, Orsay, France.,Université Paris Sud, Université Paris-Saclay, CNRS UMR3348, INSERM U1278, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Mandy Cadix
- Institut Curie, PSL Research University, CNRS UMR3348, INSERM U1278, Orsay, France.,Université Paris Sud, Université Paris-Saclay, CNRS UMR3348, INSERM U1278, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Nicolas Servant
- INSERM U900, Institut Curie, PSL Research University, Mines ParisTech, Paris, France
| | - Huimin Chen
- Laboratory of Receptor Biology and Gene Expression, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Daniel R Larson
- Laboratory of Receptor Biology and Gene Expression, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Martin Dutertre
- Institut Curie, PSL Research University, CNRS UMR3348, INSERM U1278, Orsay, France.,Université Paris Sud, Université Paris-Saclay, CNRS UMR3348, INSERM U1278, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Caroline Robert
- INSERM U981, Gustave Roussy, Gustave Roussy, Villejuif, France.,Université Paris Sud, Université Paris-Saclay, Kremlin-Bicêtre, France
| | - Stéphan Vagner
- Institut Curie, PSL Research University, CNRS UMR3348, INSERM U1278, Orsay, France.,Université Paris Sud, Université Paris-Saclay, CNRS UMR3348, INSERM U1278, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Paris, France
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4
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Unaffected Li-Fraumeni Syndrome Carrier Parent Demonstrates Allele-Specific mRNA Stabilization of Wild-Type TP53 Compared to Affected Offspring. Genes (Basel) 2022; 13:genes13122302. [PMID: 36553570 PMCID: PMC9778056 DOI: 10.3390/genes13122302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/02/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022] Open
Abstract
Li-Fraumeni Syndrome (LFS) is an autosomal dominant disorder where an oncogenic TP53 germline mutation is inherited by offspring of a carrier parent. p53 is a key tumor suppressor regulating cell cycle arrest in response to DNA damage. Unexpectedly, some mutant TP53 carriers remain unaffected, while their children develop cancer early in life. To begin unravelling this paradox, the response of dermal fibroblasts (dFb) isolated from a child with LFS was compared to those from her unaffected father after UV exposure. Phospho-Chk1[S345], a key activator of cell cycle arrest, was increased by UV induction in the LFS patient compared to their unaffected parent dFb. This result, along with previous findings of reduced CDKN1A/p21 UV induction in affected dFb, suggest that cell cycle dysregulation may contribute to cancer onset in the affected LFS subject but not the unaffected parent. Mutant p53 protein and its promoter binding affinity were also higher in dFb from the LFS patient compared to their unaffected parent. These results were as predicted based on decreased mutant TP53 allele-specific mRNA expression previously found in unaffected dFb. Investigation of the potential mechanism regulating this TP53 allele-specific expression found that, while epigenetic promoter methylation was not detectable, TP53 wild-type mRNA was specifically stabilized in the unaffected dFb. Hence, the allele-specific stabilization of wild-type TP53 mRNA may allow an unaffected parent to counteract genotoxic stress by means more characteristic of homozygous wild-type TP53 individuals than their affected offspring, providing protection from the oncogenesis associated with LFS.
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5
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Kurup AH, Patras A, Bansode RR, Pendyala B, Ravi R, Vergne MJ. Influence of UV-A irradiation on the selected nutrient composition and volatile profiling of whole milk: Safety and quality evaluation. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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6
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Lim HG, Kerns ML, Brown ID, Kang S, Chien AL. Skin type specific photobiological response to visible light is mediated by constitutional melanin. PHOTODERMATOLOGY, PHOTOIMMUNOLOGY & PHOTOMEDICINE 2022. [DOI: 10.1111/phpp.12840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 09/17/2022] [Accepted: 09/29/2022] [Indexed: 11/06/2022]
Affiliation(s)
| | - Michelle L. Kerns
- Department of Dermatology Johns Hopkins University School of Medicine Baltimore Maryland USA
| | - Isabelle D. Brown
- Department of Dermatology Johns Hopkins University School of Medicine Baltimore Maryland USA
| | - Sewon Kang
- Department of Dermatology Johns Hopkins University School of Medicine Baltimore Maryland USA
| | - Anna L. Chien
- Department of Dermatology Johns Hopkins University School of Medicine Baltimore Maryland USA
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7
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Kajitani GS, Quayle C, Garcia CCM, Fotoran WL, Dos Santos JFR, van der Horst GTJ, Hoeijmakers JHJ, Menck CFM. Photorepair of Either CPD or 6-4PP DNA Lesions in Basal Keratinocytes Attenuates Ultraviolet-Induced Skin Effects in Nucleotide Excision Repair Deficient Mice. Front Immunol 2022; 13:800606. [PMID: 35422806 PMCID: PMC9004445 DOI: 10.3389/fimmu.2022.800606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 02/28/2022] [Indexed: 11/13/2022] Open
Abstract
Ultraviolet (UV) radiation is one of the most genotoxic, universal agents present in the environment. UVB (280-315 nm) radiation directly damages DNA, producing cyclobutane pyrimidine dimers (CPDs) and pyrimidine 6-4 pyrimidone photoproducts (6-4PPs). These photolesions interfere with essential cellular processes by blocking transcription and replication polymerases, and may induce skin inflammation, hyperplasia and cell death eventually contributing to skin aging, effects mediated mainly by keratinocytes. Additionally, these lesions may also induce mutations and thereby cause skin cancer. Photolesions are repaired by the Nucleotide Excision Repair (NER) pathway, responsible for repairing bulky DNA lesions. Both types of photolesions can also be repaired by distinct (CPD- or 6-4PP-) photolyases, enzymes that specifically repair their respective photolesion by directly splitting each dimer through a light-dependent process termed photoreactivation. However, as photolyases are absent in placental mammals, these organisms depend solely on NER for the repair of DNA UV lesions. However, the individual contribution of each UV dimer in the skin effects, as well as the role of keratinocytes has remained elusive. In this study, we show that in NER-deficient mice, the transgenic expression and photorepair of CPD-photolyase in basal keratinocytes completely inhibited UVB-induced epidermal thickness and cell proliferation. On the other hand, photorepair by 6-4PP-photolyase in keratinocytes reduced but did not abrogate these UV-induced effects. The photolyase mediated removal of either CPDs or 6-4PPs from basal keratinocytes in the skin also reduced UVB-induced apoptosis, ICAM-1 expression, and myeloperoxidase activation. These findings indicate that, in NER-deficient rodents, both types of photolesions have causal roles in UVB-induced epidermal cell proliferation, hyperplasia, cell death and inflammation. Furthermore, these findings also support the notion that basal keratinocytes, instead of other skin cells, are the major cellular mediators of these UVB-induced effects.
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Affiliation(s)
- Gustavo S Kajitani
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.,Departamento de Ciências Biológicas (DECBI), Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | - Carolina Quayle
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Camila C M Garcia
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.,Departamento de Ciências Biológicas (DECBI), Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | - Wesley L Fotoran
- Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Juliana F R Dos Santos
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | | | - Jan H J Hoeijmakers
- Department of Molecular Genetics, Erasmus University Medical Center, Rotterdam, Netherlands.,University Hospital of Cologne, Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), Institute for Genome Stability in Aging and Disease, Cologne, Germany.,Princess Maxima Center for Pediatric Oncology, ONCODE Institute, Utrecht, Netherlands
| | - Carlos F M Menck
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
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8
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Tang Q, Liu L, Guo Y, Zhang X, Zhang S, Jia Y, Du Y, Cheng B, Yang L, Huang Y, Chen X. Optical Cell Tagging for Spatially Resolved Single‐Cell RNA Sequencing. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202113929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qi Tang
- College of Chemistry and Molecular Engineering Peking-Tsinghua Center for Life Sciences Beijing National Laboratory for Molecular Sciences Synthetic and Functional Biomolecules Center Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Peking University Beijing 100871 China
| | - Lu Liu
- Biomedical Pioneering Innovation Center (BIOPIC) School of Life Sciences College of Chemistry and Molecular Engineering Beijing Advanced Innovation Center for Genomics (ICG) Peking-Tsinghua Center for Life Science and Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
| | - Yilan Guo
- College of Chemistry and Molecular Engineering Peking-Tsinghua Center for Life Sciences Beijing National Laboratory for Molecular Sciences Synthetic and Functional Biomolecules Center Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Peking University Beijing 100871 China
| | - Xu Zhang
- College of Chemistry and Molecular Engineering Peking-Tsinghua Center for Life Sciences Beijing National Laboratory for Molecular Sciences Synthetic and Functional Biomolecules Center Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Peking University Beijing 100871 China
| | - Shaoran Zhang
- College of Chemistry and Molecular Engineering Peking-Tsinghua Center for Life Sciences Beijing National Laboratory for Molecular Sciences Synthetic and Functional Biomolecules Center Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Peking University Beijing 100871 China
| | - Yan Jia
- Renal Division Peking University First Hospital Beijing 100034 China
- Institute of Nephrology Key Laboratory of CKD Prevention and Treatment of Ministry of Education of China Peking University Beijing 100871 China
- Research Units of Diagnosis and Treatment of Immune-mediated Kidney Diseases Chinese Academy of Medical Sciences Beijing 100730 China
| | - Yifei Du
- College of Chemistry and Molecular Engineering Peking-Tsinghua Center for Life Sciences Beijing National Laboratory for Molecular Sciences Synthetic and Functional Biomolecules Center Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Peking University Beijing 100871 China
| | - Bo Cheng
- College of Chemistry and Molecular Engineering Peking-Tsinghua Center for Life Sciences Beijing National Laboratory for Molecular Sciences Synthetic and Functional Biomolecules Center Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Peking University Beijing 100871 China
| | - Li Yang
- Renal Division Peking University First Hospital Beijing 100034 China
- Institute of Nephrology Key Laboratory of CKD Prevention and Treatment of Ministry of Education of China Peking University Beijing 100871 China
- Research Units of Diagnosis and Treatment of Immune-mediated Kidney Diseases Chinese Academy of Medical Sciences Beijing 100730 China
| | - Yanyi Huang
- Biomedical Pioneering Innovation Center (BIOPIC) School of Life Sciences College of Chemistry and Molecular Engineering Beijing Advanced Innovation Center for Genomics (ICG) Peking-Tsinghua Center for Life Science and Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
| | - Xing Chen
- College of Chemistry and Molecular Engineering Peking-Tsinghua Center for Life Sciences Beijing National Laboratory for Molecular Sciences Synthetic and Functional Biomolecules Center Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Peking University Beijing 100871 China
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9
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Tang Q, Liu L, Guo Y, Zhang X, Zhang S, Jia Y, Du Y, Cheng B, Yang L, Huang Y, Chen X. Optical Cell Tagging for Spatially Resolved Single-Cell RNA Sequencing. Angew Chem Int Ed Engl 2021; 61:e202113929. [PMID: 34970821 DOI: 10.1002/anie.202113929] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Indexed: 01/13/2023]
Abstract
Single-cell RNA sequencing (scRNA-seq) has emerged as a powerful tool for profiling gene expression of distinct cell populations at the single-cell level. However, the information of the positions of cells within the multicellular samples is missing in scRNA-seq datasets. To overcome this limitation, we herein develop OpTAG (optical cell tagging) as a new chemical platform for attaching functional tags onto cell surfaces in a spatially resolved manner. With OpTAG, we establish OpTAG-seq, which enables spatially resolved scRNA-seq. We apply OpTAG-seq to investigate the spatially defined transcriptional program in migrating cancer cells and identified a list of genes that are potential regulators for cancer cell migration and invasion. OpTAG-seq provides a convenient method for mapping cellular heterogeneity with spatial information within multicellular biological systems.
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Affiliation(s)
- Qi Tang
- College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing, 100871, China
| | - Lu Liu
- Biomedical Pioneering Innovation Center (BIOPIC), School of Life Sciences, College of Chemistry and Molecular Engineering, Beijing Advanced Innovation Center for Genomics (ICG), Peking-Tsinghua Center for Life Science, and Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
| | - Yilan Guo
- College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing, 100871, China
| | - Xu Zhang
- College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing, 100871, China
| | - Shaoran Zhang
- College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing, 100871, China
| | - Yan Jia
- Renal Division, Peking University First Hospital, Beijing, 100034, China.,Institute of Nephrology, Key Laboratory of CKD Prevention and Treatment of Ministry of Education of China, Peking University, Beijing, 100871, China.,Research Units of Diagnosis and Treatment of Immune-mediated Kidney Diseases, Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Yifei Du
- College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing, 100871, China
| | - Bo Cheng
- College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing, 100871, China
| | - Li Yang
- Renal Division, Peking University First Hospital, Beijing, 100034, China.,Institute of Nephrology, Key Laboratory of CKD Prevention and Treatment of Ministry of Education of China, Peking University, Beijing, 100871, China.,Research Units of Diagnosis and Treatment of Immune-mediated Kidney Diseases, Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Yanyi Huang
- Biomedical Pioneering Innovation Center (BIOPIC), School of Life Sciences, College of Chemistry and Molecular Engineering, Beijing Advanced Innovation Center for Genomics (ICG), Peking-Tsinghua Center for Life Science, and Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
| | - Xing Chen
- College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing, 100871, China
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10
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MK2 degradation as a sensor of signal intensity that controls stress-induced cell fate. Proc Natl Acad Sci U S A 2021; 118:2024562118. [PMID: 34272277 DOI: 10.1073/pnas.2024562118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Cell survival in response to stress is determined by the coordination of various signaling pathways. The kinase p38α is activated by many stresses, but the intensity and duration of the signal depends on the stimuli. How different p38α-activation dynamics may impact cell life/death decisions is unclear. Here, we show that the p38α-signaling output in response to stress is modulated by the expression levels of the downstream kinase MK2. We demonstrate that p38α forms a complex with MK2 in nonstimulated mammalian cells. Upon pathway activation, p38α phosphorylates MK2, the complex dissociates, and MK2 is degraded. Interestingly, transient p38α activation allows MK2 reexpression, reassembly of the p38α-MK2 complex, and cell survival. In contrast, sustained p38α activation induced by severe stress interferes with p38α-MK2 interaction, resulting in irreversible MK2 loss and cell death. MK2 degradation is mediated by the E3 ubiquitin ligase MDM2, and we identify four lysine residues in MK2 that are directly ubiquitinated by MDM2. Expression of an MK2 mutant that cannot be ubiquitinated by MDM2 enhances the survival of stressed cells. Our results indicate that MK2 reexpression and binding to p38α is critical for cell viability in response to stress and illustrate how particular p38α-activation patterns induced by different signals shape the stress-induced cell fate.
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11
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Kuchur OA, Kuzmina DO, Dukhinova MS, Shtil AA. The p53 Protein Family in the Response of Tumor Cells to Ionizing Radiation: Problem Development. Acta Naturae 2021; 13:65-76. [PMID: 34707898 PMCID: PMC8526179 DOI: 10.32607/actanaturae.11247] [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: 09/27/2020] [Accepted: 12/24/2020] [Indexed: 12/05/2022] Open
Abstract
Survival mechanisms are activated in tumor cells in response to therapeutic ionizing radiation. This reduces a treatment's effectiveness. The p53, p63, and p73 proteins belonging to the family of proteins that regulate the numerous pathways of intracellular signal transduction play a key role in the development of radioresistance. This review analyzes the p53-dependent and p53-independent mechanisms involved in overcoming the resistance of tumor cells to radiation exposure.
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Affiliation(s)
- O. A. Kuchur
- ITMO University, Saint-Petersburg, 191002 Russia
| | | | | | - A. A. Shtil
- ITMO University, Saint-Petersburg, 191002 Russia
- Blokhin National Medical Research Center of Oncology, Moscow, 115478 Russia
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12
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Mhamdi-Ghodbani M, Starzonek C, Degenhardt S, Bender M, Said M, Greinert R, Volkmer B. UVB damage response of dermal stem cells as melanocyte precursors compared to keratinocytes, melanocytes, and fibroblasts from human foreskin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2021; 220:112216. [PMID: 34023595 DOI: 10.1016/j.jphotobiol.2021.112216] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/21/2021] [Accepted: 05/14/2021] [Indexed: 02/09/2023]
Abstract
Ultraviolet B (UVB) radiation induces mutagenic DNA photolesions in skin cells especially in form of cyclobutane pyrimidine dimers (CPDs). Protection mechanisms as DNA repair and apoptosis are of great importance in order to prevent skin carcinogenesis. In human skin, neural crest-derived precursors of melanocytes, the dermal stem cells (DSCs), are discussed to be at the origin of melanoma. Although they are constantly exposed to solar UV radiation, it is still not investigated how DSCs cope with UV-induced DNA damage. Here, we report a comparative study of the DNA damage response after irradiation with a physiological relevant UVB dose in DSCs in comparison to fibroblasts, melanocytes and keratinocytes isolated from human foreskin. Within our experimental settings, DSCs were able to repair DNA photolesions as efficient as the other skin cell types with solely keratinocytes repairing significantly faster. Interestingly, only fibroblasts showed significant alterations in cell cycle distribution in terms of a transient S phase arrest following irradiation. Moreover, with the applied UVB dose none of the examined cell types was prone to UVB-induced apoptosis. This may cause persistent genomic alterations and in case of DSCs it may have severe consequences for their daughter cells, the differentiated melanocytes. Altogether, this is the first study demonstrating a similar UV response in dermal stem cells compared to differentiated skin cells.
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Affiliation(s)
- Mouna Mhamdi-Ghodbani
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Klinikum Buxtehude, 21614 Buxtehude, Germany
| | - Christin Starzonek
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Klinikum Buxtehude, 21614 Buxtehude, Germany
| | - Sarah Degenhardt
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Klinikum Buxtehude, 21614 Buxtehude, Germany
| | - Marc Bender
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Klinikum Buxtehude, 21614 Buxtehude, Germany
| | | | - Rüdiger Greinert
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Klinikum Buxtehude, 21614 Buxtehude, Germany
| | - Beate Volkmer
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Klinikum Buxtehude, 21614 Buxtehude, Germany.
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UVB Inhibits Proliferation, Cell Cycle and Induces Apoptosis via p53, E2F1 and Microtubules System in Cervical Cancer Cell Lines. Int J Mol Sci 2021; 22:ijms22105197. [PMID: 34068980 PMCID: PMC8157236 DOI: 10.3390/ijms22105197] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/09/2021] [Accepted: 05/10/2021] [Indexed: 12/14/2022] Open
Abstract
Ultraviolet (UV) exposure has been linked to skin damage and carcinogenesis, but recently UVB has been proposed as a therapeutic approach for cancer. Herein, we investigated the cellular and molecular effects of UVB in immortal and tumorigenic HPV positive and negative cells. Cells were irradiated with 220.5 to 1102.5 J/m2 of UVB and cell proliferation was evaluated by crystal violet, while cell cycle arrest and apoptosis analysis were performed through flow cytometry. UVB effect on cells was recorded at 661.5 J/m2 and it was exacerbated at 1102.5 J/m2. All cell lines were affected by proliferation inhibition, cell cycle ablation and apoptosis induction, with different degrees depending on tumorigenesis level or HPV type. Analysis of the well-known UV-responsive p53, E2F1 and microtubules system proteins was performed in SiHa cells in response to UVB through Western-blotting assays. E2F1 and the Microtubule-associated protein 2 (MAP2) expression decrease correlated with cellular processes alteration while p53 and Microtubule-associated Protein 1S (MAP1S) expression switch was observed since 882 J/m2, suggesting they were required under more severe cellular damage. However, expression transition of α-Tubulin3C and β-Tubulin was abruptly noticed until 1102.5 J/m2 and particularly, γ-Tubulin protein expression remained without alteration. This study provides insights into the effect of UVB in cervical cancer cell lines.
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14
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Marruecos L, Manils J, Moreta C, Gómez D, Filgaira I, Serafin A, Cañas X, Espinosa L, Soler C. Single loss of a Trp53 allele triggers an increased oxidative, DNA damage and cytokine inflammatory responses through deregulation of IκBα expression. Cell Death Dis 2021; 12:359. [PMID: 33824284 PMCID: PMC8024389 DOI: 10.1038/s41419-021-03638-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 03/12/2021] [Accepted: 03/16/2021] [Indexed: 12/15/2022]
Abstract
Dose of Trp53, the main keeper of genome stability, influences tumorigenesis; however, the causes underlying and driving tumorigenesis over time by the loss of a single p53 allele are still poorly characterized. Here, we found that single p53 allele loss specifically impacted the oxidative, DNA damage and inflammatory status of hematopoietic lineages. In particular, single Trp53 allele loss in mice triggered oxidative stress in peripheral blood granulocytes and spleenocytes, whereas lack of two Trp53 alleles produced enhanced oxidative stress in thymus cells, resulting in a higher incidence of lymphomas in the Trp53 knockout (KO) mice compared with hemizygous (HEM). In addition, single or complete loss of Trp53 alleles, as well as p53 downregulation, led to a differential increase in basal, LPS- and UVB-induced expression of a plethora of pro-inflammatory cytokine, such as interleukin-12 (Il-12a), TNFα (Tnfa) and interleukin (Il-23a) in bone marrow-derived macrophage cells (BMDMs) compared to WT cells. Interestingly, p53-dependent increased inflammatory gene expression correlated with deregulated expression of the NF-κB pathway inhibitor IκBα. Chromatin immunoprecipitation data revealed decreased p65 binding to Nfkbia in the absence of p53 and p53 binding to Nfkbia promoter, uncovering a novel crosstalk mechanism between p53 and NF-κB transcription factors. Overall, our data suggest that single Trp53 allele loss can drive a sustained inflammatory, DNA damage and oxidative stress response that, over time, facilitate and support carcinogenesis.
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Affiliation(s)
- Laura Marruecos
- Cancer Research Program, CIBERONC Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain
| | - Joan Manils
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain.,Department of Immunology & Inflammation, Imperial College London, London, United Kingdom
| | - Cristina Moreta
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Diana Gómez
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Ingrid Filgaira
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Anna Serafin
- PCB Animal Facility, Parc Científic de Barcelona, Barcelona, Spain
| | - Xavier Cañas
- Vall d'Hebron Institute of Research, Barcelona, Spain
| | - Lluís Espinosa
- Cancer Research Program, CIBERONC Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain
| | - Concepció Soler
- Unitat d'Immunologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain. .,Neuropharmacology & Pain Group, Neuroscience Program, Institut d'Investigació Biomèdica de Bellvitge - IDIBELL, L'Hospitalet de Llobregat, Spain.
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15
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Loureiro JB, Abrantes M, Oliveira PA, Saraiva L. P53 in skin cancer: From a master player to a privileged target for prevention and therapy. Biochim Biophys Acta Rev Cancer 2020; 1874:188438. [PMID: 32980466 DOI: 10.1016/j.bbcan.2020.188438] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 09/22/2020] [Accepted: 09/22/2020] [Indexed: 12/12/2022]
Abstract
The increasing incidence of skin cancer (SC) is a global health concern. The commonly reported side effects and resistance mechanisms have imposed the pursuit for new therapeutic alternatives. Moreover, additional preventive strategies should be adopted to strengthen prevention and reduce the rising number of newly SC cases. This review provides relevant insights on the role of p53 tumour suppressor protein in melanoma and non-melanoma skin carcinogenesis, also highlighting the therapeutic potential of p53-targeting drugs against SC. In fact, several evidences are provided demonstrating the encouraging outcomes achieved with p53-activating drugs, alone and in combination with currently available therapies in SC. Another pertinent perspective falls on targeting p53 mutations, as molecular signatures in premature phases of photocarcinogenesis, in future SC preventive approaches. Overall, this review affords a critical and timely discussion of relevant issues related to SC prevention and therapy. Importantly, it paves the way to future studies that may boost the clinical translation of p53-activating agents, making them new effective alternatives in precision medicine of SC therapy and prevention.
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Affiliation(s)
- J B Loureiro
- LAQV/REQUIMTE, Laboratory of Microbiology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - M Abrantes
- Biophysics Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Clinical Academic Center of Coimbra, Coimbra, Portugal; Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI Consortium/Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - P A Oliveira
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - L Saraiva
- LAQV/REQUIMTE, Laboratory of Microbiology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal.
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Ortiz-Rodríguez LA, Crespo-Hernández CE. Thionated organic compounds as emerging heavy-atom-free photodynamic therapy agents. Chem Sci 2020; 11:11113-11123. [PMID: 34094354 PMCID: PMC8162790 DOI: 10.1039/d0sc04747c] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 09/15/2020] [Indexed: 12/13/2022] Open
Abstract
This minireview focuses on recent progress in developing heavy-atom-free photosensitizers based on the thionation of nucleic acid derivatives and other biocompatible organic compounds for prospective applications in photodynamic therapy. Particular attention is given to the use of thionated nucleobase derivatives as "one-two punch" photodynamic agents. These versatile photosensitizers can act as "Trojan horses" upon metabolization into DNA and exposure to activating light. Their incorporation into cellular DNA increases their selectivity and photodynamic efficacy against highly proliferating skin cancer tumor cells, while simultaneously enabling the use of low irradiation doses both in the presence and in the absence of molecular oxygen. Also reviewed are their primary photochemical reactions, modes of action, and photosensitization mechanisms. New developments of emerging thionated organic photosensitizers absorbing visible and near-infrared radiation are highlighted. Future research directions, as well as, other prospective applications of heavy-atom-free, thionated photosensitizers are discussed.
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17
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Murray D, Mirzayans R. Cellular Responses to Platinum-Based Anticancer Drugs and UVC: Role of p53 and Implications for Cancer Therapy. Int J Mol Sci 2020; 21:ijms21165766. [PMID: 32796711 PMCID: PMC7461110 DOI: 10.3390/ijms21165766] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/03/2020] [Accepted: 08/06/2020] [Indexed: 12/16/2022] Open
Abstract
Chemotherapy is intended to induce cancer cell death through apoptosis and other avenues. Unfortunately, as discussed in this article, moderate doses of genotoxic drugs such as cisplatin typical of those achieved in the clinic often invoke a cytostatic/dormancy rather than cytotoxic/apoptosis response in solid tumour-derived cell lines. This is commonly manifested by an extended apoptotic threshold, with extensive apoptosis only being seen after very high/supralethal doses of such agents. The dormancy response can be associated with senescence-like features, polyploidy and/or multinucleation, depending in part on the p53 status of the cells. In most solid tumour-derived cells, dormancy represents a long-term survival mechanism, ultimately contributing to disease recurrence. This review highlights the nonlinearity of key aspects of the molecular and cellular responses to bulky DNA lesions in human cells treated with chemotherapeutic drugs (e.g., cisplatin) or ultraviolet light-C (a widely used tool for unraveling details of the DNA damage-response) as a function of the level of genotoxic stress. Such data highlight the growing realization that targeting dormant cancer cells, which frequently emerge following conventional anticancer treatments, may represent a novel strategy to prevent or, at least, significantly suppress cancer recurrence.
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18
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Martella M, Catalanotto C, Talora C, La Teana A, Londei P, Benelli D. Inhibition of Eukaryotic Translation Initiation Factor 5A (eIF5A) Hypusination Suppress p53 Translation and Alters the Association of eIF5A to the Ribosomes. Int J Mol Sci 2020; 21:E4583. [PMID: 32605139 PMCID: PMC7369855 DOI: 10.3390/ijms21134583] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/17/2020] [Accepted: 06/25/2020] [Indexed: 12/22/2022] Open
Abstract
The eukaryotic translation initiation factor 5A (eIF5A) is an essential protein for the viability of the cells whose proposed function is to prevent the stalling of the ribosomes during translation elongation. eIF5A activity requires a unique and functionally essential post-translational modification, the change of a lysine to hypusine. eIF5A is recognized as a promoter of cell proliferation, but it has also been suggested to induce apoptosis. To date, the precise molecular mechanism through which eIF5A affects these processes remains elusive. In the present study, we explored whether eIF5A is involved in controlling the stress-induced expression of the key cellular regulator p53. Our results show that treatment of HCT-116 colon cancer cells with the deoxyhypusine (DHS) inhibitor N1-guanyl-1,7-diamineheptane (GC7) caused both inhibition of eIF5A hypusination and a significant reduction of p53 expression in UV-treated cells, and that eIF5A controls p53 expression at the level of protein synthesis. Furthermore, we show that treatment with GC7 followed by UV-induced stress counteracts the pro-apoptotic process triggered by p53 up-regulation. More in general, the importance of eIF5A in the cellular stress response is illustrated by the finding that exposure to UV light promotes the binding of eIF5A to the ribosomes, whereas UV treatment complemented by the presence of GC7 inhibits such binding, allowing a decrease of de novo synthesis of p53 protein.
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Affiliation(s)
- Marianna Martella
- Division of Cancer Therapeutics, The Institute of Cancer Research, London SW7 3RP, UK
| | - Caterina Catalanotto
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291/324, 00161 Rome, Italy; (C.C.); (C.T.); (P.L.)
| | - Claudio Talora
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291/324, 00161 Rome, Italy; (C.C.); (C.T.); (P.L.)
| | - Anna La Teana
- Department of Life and Environmental Science, Polytechnic University of Marche, 60131 Ancona, Italy;
| | - Paola Londei
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291/324, 00161 Rome, Italy; (C.C.); (C.T.); (P.L.)
| | - Dario Benelli
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291/324, 00161 Rome, Italy; (C.C.); (C.T.); (P.L.)
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Lopez Perez R, Brauer J, Rühle A, Trinh T, Sisombath S, Wuchter P, Grosu AL, Debus J, Saffrich R, Huber PE, Nicolay NH. Human mesenchymal stem cells are resistant to UV-B irradiation. Sci Rep 2019; 9:20000. [PMID: 31882818 PMCID: PMC6934474 DOI: 10.1038/s41598-019-56591-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 12/09/2019] [Indexed: 12/19/2022] Open
Abstract
Albeit being an effective therapy for various cutaneous conditions, UV-B irradiation can cause severe skin damage. While multipotent mesenchymal stem cells (MSCs) may aid the regeneration of UV-B-induced skin injuries, the influence of UV-B irradiation on MSCs remains widely unknown. Here, we show that human MSCs are relatively resistant to UV-B irradiation compared to dermal fibroblasts. MSCs exhibited higher clonogenic survival, proliferative activity and viability than dermal fibroblasts after exposure to UV-B irradiation. Cellular adhesion, morphology and expression of characteristic surface marker patterns remained largely unaffected in UV-irradiated MSCs. The differentiation ability along the adipogenic, osteogenic and chondrogenic lineages was preserved after UV-B treatment. However, UV-B radiation resulted in a reduced ability of MSCs and dermal fibroblasts to migrate. MSCs exhibited low apoptosis rates after UV-B irradiation and repaired UV-B-induced cyclobutane pyrimidine dimers more efficiently than dermal fibroblasts. UV-B irradiation led to prolonged p53 protein stability and increased p21 protein expression resulting in a prolonged G2 arrest and senescence induction in MSCs. The observed resistance may contribute to the ability of these multipotent cells to aid the regeneration of UV-B-induced skin injuries.
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Affiliation(s)
- Ramon Lopez Perez
- Department of Molecular Radiation Oncology, German Cancer Research Center (dkfz), 69120, Heidelberg, Germany
| | - Jannek Brauer
- Department of Molecular Radiation Oncology, German Cancer Research Center (dkfz), 69120, Heidelberg, Germany
- Department of Radiation Oncology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - Alexander Rühle
- Department of Molecular Radiation Oncology, German Cancer Research Center (dkfz), 69120, Heidelberg, Germany
- Department of Radiation Oncology, University of Freiburg - Medical Center, 79106, Freiburg, Germany
| | - Thuy Trinh
- Department of Molecular Radiation Oncology, German Cancer Research Center (dkfz), 69120, Heidelberg, Germany
- Department of Radiation Oncology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - Sonevisay Sisombath
- Department of Molecular Radiation Oncology, German Cancer Research Center (dkfz), 69120, Heidelberg, Germany
| | - Patrick Wuchter
- Institute of Transfusion Medicine and Immunology, German Red Cross Blood Service Baden-Württemberg - Hessen, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Anca-Ligia Grosu
- Department of Radiation Oncology, University of Freiburg - Medical Center, 79106, Freiburg, Germany
| | - Jürgen Debus
- Department of Molecular Radiation Oncology, German Cancer Research Center (dkfz), 69120, Heidelberg, Germany
- Department of Radiation Oncology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - Rainer Saffrich
- Institute of Transfusion Medicine and Immunology, German Red Cross Blood Service Baden-Württemberg - Hessen, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Peter E Huber
- Department of Molecular Radiation Oncology, German Cancer Research Center (dkfz), 69120, Heidelberg, Germany
- Department of Radiation Oncology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - Nils H Nicolay
- Department of Molecular Radiation Oncology, German Cancer Research Center (dkfz), 69120, Heidelberg, Germany.
- Department of Radiation Oncology, University of Freiburg - Medical Center, 79106, Freiburg, Germany.
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20
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Daniels EG, Alders M, Lezzerini M, McDonald A, Peters M, Kuijpers TW, Lakeman P, Houtkooper RH, MacInnes AW. A uniparental isodisomy event introducing homozygous pathogenic variants drives a multisystem metabolic disorder. Cold Spring Harb Mol Case Stud 2019; 5:mcs.a004457. [PMID: 31653659 PMCID: PMC6913148 DOI: 10.1101/mcs.a004457] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 10/07/2019] [Indexed: 01/08/2023] Open
Abstract
Uniparental isodisomy (UPiD) is a rare genetic event that occurs when two identical copies of a single chromosome are inherited from one parent. Here we report a patient with a severe, multisystem metabolic disorder who inherited two copies of Chromosome 12 from her father. He was a heterozygous carrier of a variant in the muscle-specific enzyme 6-phosphofructokinase (PFKM) gene and of a truncating variant in the pseudouridine synthase 1 (PUS1) gene (both on Chromosome 12), resulting in a homozygous state of these mutations in his daughter. The PFKM gene functions in glycolysis and is linked to Tarui syndrome. The PUS1 gene functions in mitochondrial tRNA processing and is linked to myopathy, lactic acidosis, and sideroblastic anemia (MLASA). Analysis of human dermal fibroblasts, which do not express PFKM, revealed a loss of PUS1 mRNA and PUS1 protein only in the patient cells compared to healthy controls. The patient cells also revealed a reduction of the mitochondrial-encoded protein MTCO1, whereas levels of the nuclear-encoded SDHA remained unchanged, suggesting a specific impairment of mitochondrial translation. Further destabilization of these cells is suggested by the altered levels of BAX, BCL-2, and TP53 proteins, alterations that become augmented upon exposure of the cells to DNA damage. The results illustrate the efficacy of UPiD events to reveal rare pathogenic variants in human disease and demonstrate how these events can lead to cellular destabilization.
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Affiliation(s)
- Eileen G Daniels
- Laboratory of Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Immunology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Marielle Alders
- Department of Clinical Genetics, Amsterdam Gastroenterology and Metabolism, Immunology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Marco Lezzerini
- Laboratory of Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Immunology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Andrew McDonald
- Laboratory of Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Immunology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Marjolein Peters
- Department of Pediatric Hematology, Amsterdam Gastroenterology and Metabolism, Immunology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Taco W Kuijpers
- Department of Pediatric Hematology, Immunology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Phillis Lakeman
- Department of Clinical Genetics, Amsterdam Gastroenterology and Metabolism, Immunology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Riekelt H Houtkooper
- Laboratory of Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Immunology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Alyson W MacInnes
- Laboratory of Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Immunology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
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22
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Pronin S, Koh CH, Hughes M. Cytotoxicity of ultraviolet-C radiation on a heterogeneous population of human glioblastoma multiforme cells: Meta-analysis. Photodiagnosis Photodyn Ther 2018; 24:158-163. [PMID: 30308311 DOI: 10.1016/j.pdpdt.2018.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/28/2018] [Accepted: 10/05/2018] [Indexed: 01/13/2023]
Abstract
INTRODUCTION Current treatment strategies for glioblastoma multiforme are limited due to early recurrence and heterogeneity of the cell population that causes a varied response to treatment. Ultraviolet-C (UVC) radiation may be a potential adjuvant treatment that could theoretically be delivered locally by implantable micro-electromechanical systems that sense and kill early recurrence and/or minimally residual cancer. in vitro irradiation experiments are limited because they commonly use a single cell line. Therefore other methods are required to investigate cytotoxicity across a heterogeneous population of GBM. METHODS A meta-analysis was conducted to assess the cytotoxic effects of UVC radiation on human GBM cell lines, with or without genetic modification, in monolayer to simulate a heterogeneous model. 16 publications were included using 14 different cell lines and 19 gene vectors. Effect sizes were calculated for cell survival, viability, apoptosis and proliferation. Univariate meta-regression was used to investigate the effects of radiant exposure (J/m2) and timing on cytotoxicity. RESULTS UVC resulted in a 70.9% (CI: 63.6%-78.2%) reduction in survival, 16.6% (CI: 10.8%-22.4%) increase in apoptosis, 32.0% (CI: 9.95%-54.2%) reduction in viability, and 413.8% (CI: 95.7%-731.9%) reduction in proliferation of GBM cell lines compared to controls. Radiant exposure was significantly associated with survival (R2 = 0.486, p < 0.0001) but not with apoptosis or viability. CONCLUSIONS This study provides more data on the therapeutic translational potential of UVC to a more clinically-realistic context. Overall, UVC is cytotoxic to GBM cell lines in aggregate and may be clinically useful when combined with genetic modification or other adjuvant treatments.
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Affiliation(s)
- Savva Pronin
- Translational Neurosurgery Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom.
| | - Chan Hee Koh
- Translational Neurosurgery Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Mark Hughes
- Translational Neurosurgery Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
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23
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Chang RS, Chen CS, Huang CL, Chang CT, Cui Y, Chung WJ, Shu WY, Chiang CS, Chuang CY, Hsu IC. Unexpected dose response of HaCaT to UVB irradiation. In Vitro Cell Dev Biol Anim 2018; 54:589-599. [PMID: 30083841 DOI: 10.1007/s11626-018-0280-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/12/2018] [Indexed: 11/24/2022]
Abstract
Application of high-dosage UVB irradiation in phototherapeutic dermatological treatments present health concerns attributed to UV-exposure. In assessing UV-induced photobiological damage, we investigated dose-dependent effects of UVB irradiation on human keratinocyte cells (HaCaT). Our study implemented survival and apoptosis assays and revealed an unexpected dose response wherein higher UVB-dosage induced higher viability. Established inhibitors, such as AKT- (LY294002), PKC- (Gö6976, and Rottlerin), ERK- (PD98059), P38 MAPK- (SB203580), and JNK- (SP600125), were assessed to investigate UV-induced apoptotic pathways. Despite unobvious contributions of known signaling pathways in dose-response mediation, microarray analysis identified transcriptional expression of UVB-response genes related to the respiratory-chain. Observed correlation of ROS-production with UVB irradiation potentiated ROS as the underlying mechanism for observed dose responses. Inability of established pathways to explain such responses suggests the complex nature underlying UVB-phototherapy response.
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Affiliation(s)
- Rong-Shing Chang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - Chi-Shuo Chen
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - Ching-Lung Huang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - Chiu-Ting Chang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - Yujia Cui
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | | | - Wun-Yi Shu
- Institute of Statistics, National Tsing Hua University, Hsinchu, Taiwan
| | - Chi-Shiun Chiang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - Chun-Yu Chuang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - Ian C Hsu
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section2, Kuang-Fu Road, Hsinchu, 30013, Taiwan.
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Hopf NB, Spring P, Hirt-Burri N, Jimenez S, Sutter B, Vernez D, Berthet A. Polycyclic aromatic hydrocarbons (PAHs) skin permeation rates change with simultaneous exposures to solar ultraviolet radiation (UV-S). Toxicol Lett 2018; 287:122-130. [DOI: 10.1016/j.toxlet.2018.01.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 01/26/2018] [Accepted: 01/30/2018] [Indexed: 12/28/2022]
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Alfano L, Costa C, Caporaso A, Antonini D, Giordano A, Pentimalli F. HUR protects NONO from degradation by mir320, which is induced by p53 upon UV irradiation. Oncotarget 2018; 7:78127-78139. [PMID: 27816966 PMCID: PMC5363649 DOI: 10.18632/oncotarget.13002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 10/12/2016] [Indexed: 12/13/2022] Open
Abstract
UV radiations challenge genomic stability and are a recognized cancer risk factor. We previously found that the RNA-binding protein NONO regulates the intra-S phase checkpoint and its silencing impaired HeLa and melanoma cell response to UV-induced DNA damage. Here we investigated the mechanisms underlying NONO regulation upon UVC treatment. We found that UVC rays induce the expression of mir320a, which can indeed target NONO. However, despite mir320a induction, NONO mRNA and protein expression are not affected by UVC. We found through RNA immunoprecipitation that UVC rays induce the ubiquitous RNA-binding protein HUR to bind NONO 5′UTR in a site overlapping mir320a binding site. Both HUR silencing and its pharmacological inhibition induced NONO downregulation following UVC exposure, whereas concomitant mir320a silencing restored NONO stability. UVC-mediated mir320a upregulation is triggered by p53 binding to its promoter, which lies within a region marked by H3K4me3 and H3K27ac signals upon UVC treatment. Silencing mir320a sensitizes cells to DNA damage. Overall our findings reveal a new mechanism whereby HUR protects NONO from mir320-mediated degradation upon UVC exposure and identify a new component within the complex network of players underlying the DNA damage response adding mir320a to the list of p53-regulated targets upon genotoxic stress.
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Affiliation(s)
- Luigi Alfano
- Oncology Research Center of Mercogliano (CROM), Istituto Nazionale Per Lo Studio E La Cura Dei Tumori "Fondazione Giovanni Pascale", IRCCS, Naples, 80131, Italy
| | - Caterina Costa
- Oncology Research Center of Mercogliano (CROM), Istituto Nazionale Per Lo Studio E La Cura Dei Tumori "Fondazione Giovanni Pascale", IRCCS, Naples, 80131, Italy
| | - Antonella Caporaso
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, 53100, Italy
| | | | - Antonio Giordano
- Department of Medicine, Surgery and Neuroscience, University of Siena and Istituto Toscano Tumori (ITT), Siena, 53100, Italy.,Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia PA, 19122, USA
| | - Francesca Pentimalli
- Oncology Research Center of Mercogliano (CROM), Istituto Nazionale Per Lo Studio E La Cura Dei Tumori "Fondazione Giovanni Pascale", IRCCS, Naples, 80131, Italy.,Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia PA, 19122, USA
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26
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Lee NK. Preservation effects of geniposidic acid on human keratinocytes (HaCaT) against UVB. BIOMEDICAL DERMATOLOGY 2018. [DOI: 10.1186/s41702-017-0015-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Pronin S, Koh CH, Hughes M. Effects of Ultraviolet Radiation on Glioma: Systematic Review. J Cell Biochem 2017; 118:4063-4071. [PMID: 28407299 DOI: 10.1002/jcb.26061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Accepted: 04/12/2017] [Indexed: 01/05/2023]
Abstract
Glioblastoma multiforme is the most aggressive primary brain tumor. Treatment is largely palliative, with current strategies unable to prevent inevitable tumor recurrence. Implantable micro-electromechanical systems are becoming more feasible for the management of several human diseases. These systems may have a role in detecting tumor recurrence and delivering localized therapies. One potential therapeutic tool is ultraviolet (UV) light. This systematic review assesses the effects of UV light on glioma cells. A total of 47 publications are included. The large majority were in vitro experiments conducted on human glioblastoma cell lines in monolayer. In these cells, UV light was shown to induce apoptosis and the expression of genes or activation of proteins that modulate cell death, repair, and proliferation. The nature and magnitude of cellular response varied by UV wavelength, dose, cell line, and time after irradiation. UVC (wavelength 100-280 nm) was most effective at inducing apoptosis, and this effect was dose dependent. The included studies had varied methodologies, complicating reconciliation of results. Further work will be required to determine the best regime of UV irradiation for therapeutic use. J. Cell. Biochem. 118: 4063-4071, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Savva Pronin
- Edinburgh Medical School, University of Edinburgh, Edinburgh, UK
| | - Chan Hee Koh
- Edinburgh Medical School, University of Edinburgh, Edinburgh, UK
| | - Mark Hughes
- Translational Neurosurgery Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
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28
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Lunov O, Zablotskii V, Churpita O, Lunova M, Jirsa M, Dejneka A, Kubinová Š. Chemically different non-thermal plasmas target distinct cell death pathways. Sci Rep 2017; 7:600. [PMID: 28377599 PMCID: PMC5428849 DOI: 10.1038/s41598-017-00689-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 03/08/2017] [Indexed: 02/07/2023] Open
Abstract
A rigorous biochemical analysis of interactions between non-thermal plasmas (NTPs) and living cells has become an important research topic, due to recent developments in biomedical applications of non-thermal plasmas. Here, we decouple distinct cell death pathways targeted by chemically different NTPs. We show that helium NTP cells treatment, results in necrosome formation and necroptosis execution, whereas air NTP leads to mTOR activation and autophagy inhibition, that induces mTOR-related necrosis. On the contrary, ozone (abundant component of air NTP) treatment alone, exhibited the highest levels of reactive oxygen species production leading to CypD-related necrosis via the mitochondrial permeability transition. Our findings offer a novel insight into plasma-induced cellular responses, and reveal distinct cell death pathways triggered by NTPs.
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Affiliation(s)
- Oleg Lunov
- Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, 18221, Czech Republic.
| | - Vitalii Zablotskii
- Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, 18221, Czech Republic
| | - Olexander Churpita
- Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, 18221, Czech Republic
| | - Mariia Lunova
- Institute for Clinical & Experimental Medicine (IKEM), Prague, 14021, Czech Republic
| | - Milan Jirsa
- Institute for Clinical & Experimental Medicine (IKEM), Prague, 14021, Czech Republic
| | - Alexandr Dejneka
- Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, 18221, Czech Republic
| | - Šárka Kubinová
- Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, 18221, Czech Republic.,Institute of Experimental Medicine AS CR, Prague, 14220, Czech Republic
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29
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Buzby JS, Williams SA, Schaffer L, Head SR, Nugent DJ. Allele-specific wild-type TP53 expression in the unaffected carrier parent of children with Li-Fraumeni syndrome. Cancer Genet 2017; 211:9-17. [PMID: 28279309 DOI: 10.1016/j.cancergen.2017.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 12/14/2016] [Accepted: 01/06/2017] [Indexed: 01/01/2023]
Abstract
Li-Fraumeni syndrome (LFS) is an autosomal dominant disorder where an oncogenic TP53 germline mutation is passed from parent to child. Tumor protein p53 is a key tumor suppressor regulating cell cycle arrest in response to DNA damage. Paradoxically, some mutant TP53 carriers remain unaffected, while their children develop cancer within the first few years of life. To address this paradox, response to UV stress was compared in dermal fibroblasts (dFb) from an affected LFS patient vs. their unaffected carrier parent. UV induction of CDKN1A/p21, a regulatory target of p53, in LFS patient dFb was significantly reduced compared to the unaffected parent. UV exposure also induced significantly greater p53[Ser15]-phosphorylation in LFS patient dFb, a reported property of some mutant p53 variants. Taken together, these results suggested that unaffected parental dFb may express an increased proportion of wild-type vs. mutant p53. Indeed, a significantly increased ratio of wild-type to mutant TP53 allele-specific expression in the unaffected parent dFb was confirmed by RT-PCR-RFLP and RNA-seq analysis. Hence, allele-specific expression of wild-type TP53 may allow an unaffected parent to mount a response to genotoxic stress more characteristic of homozygous wild-type TP53 individuals than their affected offspring, providing protection from the oncogenesis associated with LFS.
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Affiliation(s)
- Jeffrey S Buzby
- Hematology Research and Advanced Diagnostics Laboratories, CHOC Children's Hospital of Orange County, Orange, CA, USA.
| | - Shirley A Williams
- Hematology Research and Advanced Diagnostics Laboratories, CHOC Children's Hospital of Orange County, Orange, CA, USA
| | - Lana Schaffer
- Next Generation Sequencing and Microarray Core Facility, The Scripps Research Institute, La Jolla, CA, USA
| | - Steven R Head
- Next Generation Sequencing and Microarray Core Facility, The Scripps Research Institute, La Jolla, CA, USA
| | - Diane J Nugent
- Hematology Research and Advanced Diagnostics Laboratories, CHOC Children's Hospital of Orange County, Orange, CA, USA; Division of Hematology, CHOC Children's Hospital of Orange County, Orange, CA, USA; Division of Pediatric Hematology, School of Medicine, University of California at Irvine, Orange, CA, USA
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30
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Cell-matrix signals specify bone endothelial cells during developmental osteogenesis. Nat Cell Biol 2017; 19:189-201. [PMID: 28218908 PMCID: PMC5580829 DOI: 10.1038/ncb3476] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 01/18/2017] [Indexed: 02/06/2023]
Abstract
Blood vessels in the mammalian skeletal system control bone formation and support haematopoiesis by generating local niche environments. While a specialized capillary subtype, termed type H, has been recently shown to couple angiogenesis and osteogenesis in adolescent, adult and ageing mice, little is known about the formation of specific endothelial cell populations during early developmental endochondral bone formation. Here, we report that embryonic and early postnatal long bone contains a specialized endothelial cell subtype, termed type E, which strongly supports osteoblast lineage cells and later gives rise to other endothelial cell subpopulations. The differentiation and functional properties of bone endothelial cells require cell-matrix signalling interactions. Loss of endothelial integrin β1 leads to endothelial cell differentiation defects and impaired postnatal bone growth, which is, in part, phenocopied by endothelial cell-specific laminin α5 mutants. Our work outlines fundamental principles of vessel formation and endothelial cell differentiation in the developing skeletal system.
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31
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Petrova NV, Velichko AK, Razin SV, Kantidze OL. Small molecule compounds that induce cellular senescence. Aging Cell 2016; 15:999-1017. [PMID: 27628712 PMCID: PMC6398529 DOI: 10.1111/acel.12518] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/19/2016] [Indexed: 12/12/2022] Open
Abstract
To date, dozens of stress‐induced cellular senescence phenotypes have been reported. These cellular senescence states may differ substantially from each other, as well as from replicative senescence through the presence of specific senescence features. Here, we attempted to catalog virtually all of the cellular senescence‐like states that can be induced by low molecular weight compounds. We summarized biological markers, molecular pathways involved in senescence establishment, and specific traits of cellular senescence states induced by more than fifty small molecule compounds.
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Affiliation(s)
| | - Artem K. Velichko
- Institute of Gene Biology RAS 34/5 Vavilova Street 119334 Moscow Russia
| | - Sergey V. Razin
- Institute of Gene Biology RAS 34/5 Vavilova Street 119334 Moscow Russia
- Department of Molecular Biology Lomonosov Moscow State University 119991 Moscow Russia
- LIA 1066 French‐Russian Joint Cancer Research Laboratory 94805 Villejuif France
| | - Omar L. Kantidze
- Institute of Gene Biology RAS 34/5 Vavilova Street 119334 Moscow Russia
- LIA 1066 French‐Russian Joint Cancer Research Laboratory 94805 Villejuif France
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32
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Jugé R, Breugnot J, Da Silva C, Bordes S, Closs B, Aouacheria A. Quantification and Characterization of UVB-Induced Mitochondrial Fragmentation in Normal Primary Human Keratinocytes. Sci Rep 2016; 6:35065. [PMID: 27731355 PMCID: PMC5059735 DOI: 10.1038/srep35065] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 09/21/2016] [Indexed: 12/31/2022] Open
Abstract
UV irradiation is a major environmental factor causing skin dryness, aging and cancer. UVB in particular triggers cumulative DNA damage, oxidative stress and mitochondrial dysfunction. The objective of our study was to provide both qualitative and quantitative analysis of how mitochondria respond to UVB irradiation in normal human epidermal keratinocytes (NHEK) of healthy donors, with the rationale that monitoring mitochondrial shape will give an indication of cell population fitness and enable the screening of bioactive agents with UVB-protective properties. Our results show that NHEK undergo dose-dependent mitochondrial fragmentation after exposure to UVB. In order to obtain a quantitative measure of this phenomenon, we implemented a novel tool for automated quantification of mitochondrial morphology in live cells based on confocal microscopy and computational calculations of mitochondrial shape descriptors. This method was used to substantiate the effects on mitochondrial morphology of UVB irradiation and of knocking-down the mitochondrial fission-mediating GTPase Dynamin-related protein 1 (DRP1). Our data further indicate that all the major mitochondrial dynamic proteins are expressed in NHEK but that their level changes were stronger after mitochondrial uncoupler treatment than following UVB irradiation or DRP1 knock-down. Our system and procedures might be of interest for the identification of cosmetic or dermatologic UVB-protective agents.
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Affiliation(s)
- Romain Jugé
- Molecular Biology of the Cell Laboratory, Ecole Normale Supérieure de Lyon, UMR 5239 CNRS - UCBL - ENS Lyon, 46 Allée d'Italie, 69364 Lyon Cedex 07, France.,SILAB, ZAC de la Nau, 19240 Saint-Viance, France
| | | | - Célia Da Silva
- Molecular Biology of the Cell Laboratory, Ecole Normale Supérieure de Lyon, UMR 5239 CNRS - UCBL - ENS Lyon, 46 Allée d'Italie, 69364 Lyon Cedex 07, France
| | | | | | - Abdel Aouacheria
- Molecular Biology of the Cell Laboratory, Ecole Normale Supérieure de Lyon, UMR 5239 CNRS - UCBL - ENS Lyon, 46 Allée d'Italie, 69364 Lyon Cedex 07, France.,ISEM - Institut des Sciences de l'Evolution de Montpellier, UMR 5554, Université de Montpellier
- CNRS
- IRD
- EPHE, Place Eugène Bataillon, 34095 Montpellier, France
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33
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Sun X, Kim A, Nakatani M, Shen Y, Liu L. Distinctive molecular responses to ultraviolet radiation between keratinocytes and melanocytes. Exp Dermatol 2016; 25:708-13. [PMID: 27119462 PMCID: PMC5295856 DOI: 10.1111/exd.13057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2016] [Indexed: 01/13/2023]
Abstract
Solar ultraviolet radiation (UVR) is the major risk factor for skin carcinogenesis. To gain new insights into the molecular pathways mediating UVR effects in the skin, we performed comprehensive transcriptomic analyses to identify shared and distinctive molecular responses to UVR between human keratinocytes and melanocytes. Keratinocytes and melanocytes were irradiated with varying doses of UVB (10, 20 and 30 mJ/cm(2) ) then analysed by RNA-Seq at different time points post-UVB radiation (4, 24 and 72 h). Under basal conditions, keratinocytes and melanocytes expressed similar number of genes, although they each expressed a distinctive subset of genes pertaining to their specific cellular identity. Upon UVB radiation, keratinocytes displayed a clear pattern of time- and dose-dependent changes in gene expression that was different from melanocytes. The early UVB-responsive gene set (4 h post-UVR) differed significantly from delayed UVB-responsive gene sets (24 and 72 h). We also identified multiple novel UVB signature genes including PRSS23, SERPINH1, LCE3D and CNFN, which were conserved between melanocyte and keratinocyte lines from different individuals. Taken together, our findings elucidated both common and distinctive molecular features between melanocytes and keratinocytes and uncovered novel UVB signature genes that might be utilized to predict UVB photobiological effects on the skin.
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Affiliation(s)
- Xiaoyun Sun
- JP Sulzberger Columbia Genome Center, Columbia University, New York, NY, USA
| | - Arianna Kim
- Department of Dermatology, Columbia University, New York, NY, USA
| | - Masashi Nakatani
- Department of Dermatology, Columbia University, New York, NY, USA
| | - Yao Shen
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Liang Liu
- Department of Dermatology, Columbia University, New York, NY, USA
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34
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Mitochondrial emitted electromagnetic signals mediate retrograde signaling. Med Hypotheses 2015; 85:810-8. [DOI: 10.1016/j.mehy.2015.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 09/25/2015] [Accepted: 10/09/2015] [Indexed: 12/19/2022]
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Abstract
p53 has been studied intensively as a major tumour suppressor that detects oncogenic events in cancer cells and eliminates them through senescence (a permanent non-proliferative state) or apoptosis. Consistent with this role, p53 activity is compromised in a high proportion of all cancer types, either through mutation of the TP53 gene (encoding p53) or changes in the status of p53 modulators. p53 has additional roles, which may overlap with its tumour-suppressive capacity, in processes including the DNA damage response, metabolism, aging, stem cell differentiation and fertility. Moreover, many mutant p53 proteins, termed 'gain-of-function' (GOF), acquire new activities that help drive cancer aggression. p53 is regulated mainly through protein turnover and operates within a negative-feedback loop with its transcriptional target, MDM2 (murine double minute 2), an E3 ubiquitin ligase which mediates the ubiquitylation and proteasomal degradation of p53. Induction of p53 is achieved largely through uncoupling the p53-MDM2 interaction, leading to elevated p53 levels. Various stress stimuli acting on p53 (such as hyperproliferation and DNA damage) use different, but overlapping, mechanisms to achieve this. Additionally, p53 activity is regulated through critical context-specific or fine-tuning events, mediated primarily through post-translational mechanisms, particularly multi-site phosphorylation and acetylation. In the present review, I broadly examine these events, highlighting their regulatory contributions, their ability to integrate signals from cellular events towards providing most appropriate response to stress conditions and their importance for tumour suppression. These are fascinating aspects of molecular oncology that hold the key to understanding the molecular pathology of cancer and the routes by which it may be tackled therapeutically.
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36
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Dynamics of P53 in response to DNA damage: Mathematical modeling and perspective. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2015; 119:175-82. [DOI: 10.1016/j.pbiomolbio.2015.08.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/12/2015] [Indexed: 12/21/2022]
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37
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Jacovas VC, Rovaris DL, Peréz O, de Azevedo S, Macedo GS, Sandoval JR, Salazar-Granara A, Villena M, Dugoujon JM, Bisso-Machado R, Petzl-Erler ML, Salzano FM, Ashton-Prolla P, Ramallo V, Bortolini MC. Genetic Variations in the TP53 Pathway in Native Americans Strongly Suggest Adaptation to the High Altitudes of the Andes. PLoS One 2015; 10:e0137823. [PMID: 26382048 PMCID: PMC4575214 DOI: 10.1371/journal.pone.0137823] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 08/24/2015] [Indexed: 02/05/2023] Open
Abstract
The diversity of the five single nucleotide polymorphisms located in genes of the TP53 pathway (TP53, rs1042522; MDM2, rs2279744; MDM4, rs1563828; USP7, rs1529916; and LIF, rs929271) were studied in a total of 282 individuals belonging to Quechua, Aymara, Chivay, Cabanaconde, Yanke, Taquile, Amantani, Anapia, Uros, Guarani Ñandeva, and Guarani Kaiowá populations, characterized as Native American or as having a high level (> 90%) of Native American ancestry. In addition, published data pertaining to 100 persons from five other Native American populations (Surui, Karitiana, Maya, Pima, and Piapoco) were analyzed. The populations were classified as living in high altitude (≥ 2,500 m) or in lowlands (< 2,500 m). Our analyses revealed that alleles USP7-G, LIF-T, and MDM2-T showed significant evidence that they were selected for in relation to harsh environmental variables related to high altitudes. Our results show for the first time that alleles of classical TP53 network genes have been evolutionary co-opted for the successful human colonization of the Andes.
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Affiliation(s)
- Vanessa Cristina Jacovas
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil
| | - Diego Luiz Rovaris
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil
| | - Orlando Peréz
- Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Puerto Madryn, Argentina
| | - Soledad de Azevedo
- Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Puerto Madryn, Argentina
| | - Gabriel Souza Macedo
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil
| | - José Raul Sandoval
- Facultad de Medicina Humana, Universidad de San Martin de Porres (USMP), Lima, Peru
| | | | - Mercedes Villena
- Instituto Boliviano de Biología de Altura (IBBA), Universidad Mayor de San Andres, La Paz, Bolivia
| | - Jean-Michel Dugoujon
- Anthropologie Moléculaire et Imagerie de Synthèse, CNRS UMR 5288, Université Paul Sabatier Toulouse III, Toulouse, 31000, France
| | - Rafael Bisso-Machado
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil
| | - Maria Luiza Petzl-Erler
- Laboratório de Genética Molecular, Departamento de Genética, Universidade Federal do Paraná, Curitiba, PR, Brasil
| | - Francisco Mauro Salzano
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil
| | - Patricia Ashton-Prolla
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil
- Serviço de Genética Medica, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil
| | - Virginia Ramallo
- Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Puerto Madryn, Argentina
| | - Maria Cátira Bortolini
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil
- * E-mail:
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38
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Abdullah A, Sane S, Freeling JL, Wang H, Zhang D, Rezvani K. Nucleocytoplasmic Translocation of UBXN2A Is Required for Apoptosis during DNA Damage Stresses in Colon Cancer Cells. J Cancer 2015; 6:1066-78. [PMID: 26516353 PMCID: PMC4615341 DOI: 10.7150/jca.12134] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Accepted: 08/02/2015] [Indexed: 12/12/2022] Open
Abstract
The subcellular localization, expression level, and activity of anti-cancer proteins alter in response to intrinsic and extrinsic cellular stresses to reverse tumor progression. The purpose of this study is to determine whether UBXN2A, an activator of the p53 tumor suppressor protein, has different subcellular compartmentalization in response to the stress of DNA damage. We measured trafficking of the UBXN2A protein in response to two different DNA damage stresses, UVB irradiation and the genotoxic agent Etoposide, in colon cancer cell lines. Using a cytosol-nuclear fractionation technique followed by western blot and immunofluorescence staining, we monitored and quantitated UBXN2A and p53 proteins as well as p53's downstream apoptotic pathway. We showed that the anti-cancer protein UBXN2A acts in the early phase of cell response to two different DNA damage stresses, being induced to translocate into the cytoplasm in a dose- and time-dependent manner. UVB-induced cytoplasmic UBXN2A binds to mortalin-2 (mot-2), a known oncoprotein in colon tumors. UVB-dependent upregulation of UBXN2A in the cytoplasm decreases p53 binding to mot-2 and activates apoptotic events in colon cancer cells. In contrast, the shRNA-mediated depletion of UBXN2A leads to significant reduction in apoptosis in colon cancer cells exposed to UVB and Etoposide. Leptomycin B (LMB), which was able to block UBXN2A nuclear export following Etoposide treatment, sustained p53-mot-2 interaction and had partially antagonistic effects with Etoposide on cell apoptosis. The present study shows that nucleocytoplasmic translocation of UBXN2A in response to stresses is necessary for its anti-cancer function in the cytoplasm. In addition, LMB-dependent suppression of UBXN2A's translocation to the cytoplasm upon stress allows the presence of an active mot-2 oncoprotein in the cytoplasm, resulting in p53 sequestration as well as activation of other mot-2-dependent growth promoting pathways.
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Affiliation(s)
- Ammara Abdullah
- 1. Division of Basic Biomedical Sciences, Sanford School of Medicine, The University of South Dakota, 414 E. Clark Street, Lee Medical Building, Vermillion, SD 57069, USA
| | - Sanam Sane
- 1. Division of Basic Biomedical Sciences, Sanford School of Medicine, The University of South Dakota, 414 E. Clark Street, Lee Medical Building, Vermillion, SD 57069, USA
| | - Jessica L Freeling
- 1. Division of Basic Biomedical Sciences, Sanford School of Medicine, The University of South Dakota, 414 E. Clark Street, Lee Medical Building, Vermillion, SD 57069, USA
| | - Hongmin Wang
- 1. Division of Basic Biomedical Sciences, Sanford School of Medicine, The University of South Dakota, 414 E. Clark Street, Lee Medical Building, Vermillion, SD 57069, USA
| | - Dong Zhang
- 2. Department of Biomedical Sciences, College of Osteopathic Medicine, New York Institute of Technology, Northern Blvd., P.O. Box 8000, Old Westbury, NY 11568-8000, USA
| | - Khosrow Rezvani
- 1. Division of Basic Biomedical Sciences, Sanford School of Medicine, The University of South Dakota, 414 E. Clark Street, Lee Medical Building, Vermillion, SD 57069, USA
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Identification and characterisation of Emp53, the homologue of human tumor suppressor p53, from Echinococcus multilocularis: its role in apoptosis and the oxidative stress response. Int J Parasitol 2015; 45:517-26. [DOI: 10.1016/j.ijpara.2015.02.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 01/29/2015] [Accepted: 02/02/2015] [Indexed: 12/18/2022]
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Mancini F, Pieroni L, Monteleone V, Lucà R, Fici L, Luca E, Urbani A, Xiong S, Soddu S, Masetti R, Lozano G, Pontecorvi A, Moretti F. MDM4/HIPK2/p53 cytoplasmic assembly uncovers coordinated repression of molecules with anti-apoptotic activity during early DNA damage response. Oncogene 2015; 35:228-40. [PMID: 25961923 PMCID: PMC4717155 DOI: 10.1038/onc.2015.76] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 02/02/2015] [Accepted: 02/18/2015] [Indexed: 12/14/2022]
Abstract
The p53 inhibitor, MDM4 (MDMX) is a cytoplasmic protein with p53-activating function under DNA damage conditions. Particularly, MDM4 promotes phosphorylation of p53 at Ser46, a modification that precedes different p53 activities. We investigated the mechanism by which MDM4 promotes this p53 modification and its consequences in untransformed mammary epithelial cells and tissues. In response to severe DNA damage, MDM4 stimulates p53Ser46P by binding and stabilizing serine–threonine kinase HIPK2. Under these conditions, the p53-inhibitory complex, MDM4/MDM2, dissociates and this allows MDM4 to promote p53/HIPK2 functional interaction. Comparative proteomic analysis of DNA damage-treated cells versus -untreated cells evidenced a diffuse downregulation of proteins with anti-apoptotic activity, some of which were targets of p53Ser46P/HIPK2 repressive activity. Importantly, MDM4 depletion abolishes the downregulation of these proteins indicating the requirement of MDM4 to promote p53-mediated transcriptional repression. Consistently, MDM4-mediated HIPK2/p53 activation precedes HIPK2/p53 nuclear translocation and activity. Noteworthy, repression of these proteins was evident also in mammary glands of mice subjected to γ-irradiation and was significantly enhanced in transgenic mice overexpressing MDM4. This study evidences the flexibility of MDM2/MDM4 heterodimer, which allows the development of a positive activity of cytoplasmic MDM4 towards p53-mediated transcriptional function. Noteworthy, this activity uncovers coordinated repression of molecules with shared anti-apoptotic function which precedes active cell apoptosis and that are frequently overexpressed and/or markers of tumour phenotype in human cancer.
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Affiliation(s)
- F Mancini
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy.,Department of Endocrinology and Metabolism, Catholic University of Roma, Roma, Italy
| | - L Pieroni
- Proteomic and Metabolomic Laboratory, Fondazione Santa Lucia, Roma, Italy.,Department of Experimental Medicine and Surgery, University of Roma 'Tor Vergata', Roma, Italy
| | - V Monteleone
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy
| | - R Lucà
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy
| | - L Fici
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy.,Department of Obstetrics and Gynaecology, Catholic University of Roma, Roma, Italy
| | - E Luca
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy.,Department of Endocrinology and Metabolism, Catholic University of Roma, Roma, Italy
| | - A Urbani
- Proteomic and Metabolomic Laboratory, Fondazione Santa Lucia, Roma, Italy.,Department of Experimental Medicine and Surgery, University of Roma 'Tor Vergata', Roma, Italy
| | - S Xiong
- Department of Genetics, M.D. Anderson Cancer Center, Houston, TX, USA
| | - S Soddu
- Regina Elena National Cancer Institute, Roma, Italy
| | - R Masetti
- Department of Obstetrics and Gynaecology, Catholic University of Roma, Roma, Italy
| | - G Lozano
- Department of Genetics, M.D. Anderson Cancer Center, Houston, TX, USA
| | - A Pontecorvi
- Department of Endocrinology and Metabolism, Catholic University of Roma, Roma, Italy
| | - F Moretti
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy
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41
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Arora S, Tyagi N, Bhardwaj A, Rusu L, Palanki R, Vig K, Singh SR, Singh AP, Palanki S, Miller ME, Carter JE, Singh S. Silver nanoparticles protect human keratinocytes against UVB radiation-induced DNA damage and apoptosis: potential for prevention of skin carcinogenesis. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 11:1265-75. [PMID: 25804413 DOI: 10.1016/j.nano.2015.02.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 02/23/2015] [Indexed: 10/23/2022]
Abstract
UNLABELLED Ultraviolet (UV)-B radiation from the sun is an established etiological cause of skin cancer, which afflicts more than a million lives each year in the United States alone. Here, we tested the chemopreventive efficacy of silver-nanoparticles (AgNPs) against UVB-irradiation-induced DNA damage and apoptosis in human immortalized keratinocytes (HaCaT). AgNPs were synthesized by reduction-chemistry and characterized for their physicochemical properties. AgNPs were well tolerated by HaCaT cells and their pretreatment protected them from UVB-irradiation-induced apoptosis along with significant reduction in cyclobutane-pyrimidine-dimer formation. Moreover, AgNPs pre-treatment led to G1-phase cell-cycle arrest in UVB-irradiated HaCaT cells. AgNPs were efficiently internalized in UVB-irradiated cells and localized into cytoplasmic and nuclear compartments. Furthermore, we observed an altered expression of various genes involved in cell-cycle, apoptosis and nucleotide-excision repair in HaCaT cells treated with AgNPs prior to UVB-irradiation. Together, these findings provide support for potential utility of AgNPs as novel chemopreventive agents against UVB-irradiation-induced skin carcinogenesis. FROM THE CLINICAL EDITOR Excessive exposure to the sun is known to increase the risk of skin cancer due to DNA damage. In this work, the authors tested the use of silver nanoparticles as protective agents against ultraviolet radiation. The positive results may open a door for the use of silver nanoparticle as novel agents in the future.
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Affiliation(s)
- Sumit Arora
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA
| | - Nikhil Tyagi
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA
| | - Arun Bhardwaj
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA
| | - Lilia Rusu
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA; Department of Chemical and Biomolecular Engineering, University of South Alabama, Mobile, AL, USA
| | - Rohan Palanki
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA
| | - Komal Vig
- Alabama State University, Montgomery, AL, USA
| | | | - Ajay P Singh
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA; Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama, Mobile, AL, USA
| | - Srinivas Palanki
- Department of Chemical and Biomolecular Engineering, University of South Alabama, Mobile, AL, USA
| | - Michael E Miller
- Auburn University Research Instrumentation Facility - Advanced Microscopy and Imaging Laboratory, Auburn, AL, USA
| | - James E Carter
- Department of Pathology, College of Medicine, University of South Alabama, Mobile, AL, USA
| | - Seema Singh
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA.
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42
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Dewi V, Kwok A, Lee S, Lee MM, Tan YM, Nicholas HR, Isono KI, Wienert B, Mak KS, Knights AJ, Quinlan KGR, Cordwell SJ, Funnell APW, Pearson RCM, Crossley M. Phosphorylation of Krüppel-like factor 3 (KLF3/BKLF) and C-terminal binding protein 2 (CtBP2) by homeodomain-interacting protein kinase 2 (HIPK2) modulates KLF3 DNA binding and activity. J Biol Chem 2015; 290:8591-605. [PMID: 25659434 DOI: 10.1074/jbc.m115.638338] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Krüppel-like factor 3 (KLF3/BKLF), a member of the Krüppel-like factor (KLF) family of transcription factors, is a widely expressed transcriptional repressor with diverse biological roles. Although there is considerable understanding of the molecular mechanisms that allow KLF3 to silence the activity of its target genes, less is known about the signal transduction pathways and post-translational modifications that modulate KLF3 activity in response to physiological stimuli. We observed that KLF3 is modified in a range of different tissues and found that the serine/threonine kinase homeodomain-interacting protein kinase 2 (HIPK2) can both bind and phosphorylate KLF3. Mass spectrometry identified serine 249 as the primary phosphorylation site. Mutation of this site reduces the ability of KLF3 to bind DNA and repress transcription. Furthermore, we also determined that HIPK2 can phosphorylate the KLF3 co-repressor C-terminal binding protein 2 (CtBP2) at serine 428. Finally, we found that phosphorylation of KLF3 and CtBP2 by HIPK2 strengthens the interaction between these two factors and increases transcriptional repression by KLF3. Taken together, our results indicate that HIPK2 potentiates the activity of KLF3.
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Affiliation(s)
- Vitri Dewi
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Alister Kwok
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Stella Lee
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Ming Min Lee
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Yee Mun Tan
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Hannah R Nicholas
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Kyo-ichi Isono
- the RIKEN Research Center for Allergy and Immunology, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan
| | - Beeke Wienert
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Ka Sin Mak
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Alexander J Knights
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Kate G R Quinlan
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Stuart J Cordwell
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Alister P W Funnell
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Richard C M Pearson
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Merlin Crossley
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia, the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
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Kim BM, Rhee JS, Lee KW, Kim MJ, Shin KH, Lee SJ, Lee YM, Lee JS. UV-B radiation-induced oxidative stress and p38 signaling pathway involvement in the benthic copepod Tigriopus japonicus. Comp Biochem Physiol C Toxicol Pharmacol 2015; 167:15-23. [PMID: 25152408 DOI: 10.1016/j.cbpc.2014.08.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 08/08/2014] [Accepted: 08/14/2014] [Indexed: 12/17/2022]
Abstract
Ultraviolet B (UV-B) radiation presents an environmental hazard to aquatic organisms. To understand the molecular responses of the intertidal copepod Tigriopus japonicus to UV-B radiation, we measured the acute toxicity response to 96 h of UV-B radiation, and we also assessed the intracellular reactive oxygen species (ROS) levels, glutathione (GSH) content, and antioxidant enzyme (GST, GR, GPx, and SOD) activities after 24 h of exposure to UV-B with LD50 and half LD50 values. Also, expression patterns of p53 and hsp gene families with phosphorylation of p38 MAPK were investigated in UV-B-exposed copepods. We found that the ROS level, GSH content, and antioxidant enzyme activity levels were increased with the transcriptional upregulation of antioxidant-related genes, indicating that UV-B induces oxidative stress by generating ROS and stimulating antioxidant enzymatic activity as a defense mechanism. Additionally, we found that p53 expression was significantly increased after UV-B irradiation due to increases in the phosphorylation of the stress-responsive p38 MAPK, indicating that UV-B may be responsible for inducing DNA damage in T. japonicus. Of the hsp family genes, transcriptional levels of hsp20, hsp20.7, hsp70, and hsp90 were elevated in response to a low dose of UV-B radiation (9 kJ m(-2)), suggesting that these hsp genes may be involved in cellular protection against UV-B radiation. In this paper, we performed a pathway-oriented mechanistic analysis in response to UV-B radiation, and this analysis provides a better understanding of the effects of UV-B in the intertidal benthic copepod T. japonicus.
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Affiliation(s)
- Bo-Mi Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Jae-Sung Rhee
- Department of Marine Science, College of Natural Sciences, Incheon National University, Incheon 406-772, South Korea
| | - Kyun-Woo Lee
- Pacific Ocean Research Center, Korea Institute of Ocean Science and Technology, Ansan 426-744, South Korea
| | - Min-Jung Kim
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul 133-791, South Korea
| | - Kyung-Hoon Shin
- Department of Marine Sciences and Convergent Technology, College of Science and Technology, Hanyang University, Ansan 426-791, South Korea
| | - Su-Jae Lee
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul 133-791, South Korea
| | - Young-Mi Lee
- Department of Life Science, College of Natural Sciences, Sangmyung University, Seoul 110-743, South Korea.
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 440-746, South Korea.
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Moutaoufik MT, El Fatimy R, Nassour H, Gareau C, Lang J, Tanguay RM, Mazroui R, Khandjian EW. UVC-induced stress granules in mammalian cells. PLoS One 2014; 9:e112742. [PMID: 25409157 PMCID: PMC4237350 DOI: 10.1371/journal.pone.0112742] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 10/14/2014] [Indexed: 01/26/2023] Open
Abstract
Stress granules (SGs) are well characterized cytoplasmic RNA bodies that form under various stress conditions. We have observed that exposure of mammalian cells in culture to low doses of UVC induces the formation of discrete cytoplasmic RNA granules that were detected by immunofluorescence staining using antibodies to RNA-binding proteins. UVC-induced cytoplasmic granules are not Processing Bodies (P-bodies) and are bone fide SGs as they contain TIA-1, TIA-1/R, Caprin1, FMRP, G3BP1, PABP1, well known markers, and mRNA. Concomitant with the accumulation of the granules in the cytoplasm, cells enter a quiescent state, as they are arrested in G1 phase of the cell cycle in order to repair DNA damages induced by UVC irradiation. This blockage persists as long as the granules are present. A tight correlation between their decay and re-entry into S-phase was observed. However the kinetics of their formation, their low number per cell, their absence of fusion into larger granules, their persistence over 48 hours and their slow decay, all differ from classical SGs induced by arsenite or heat treatment. The induction of these SGs does not correlate with major translation inhibition nor with phosphorylation of the α subunit of eukaryotic translation initiation factor 2 (eIF2α). We propose that a restricted subset of mRNAs coding for proteins implicated in cell cycling are removed from the translational apparatus and are sequestered in a repressed form in SGs.
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Affiliation(s)
- Mohamed Taha Moutaoufik
- Centre de recherche, Institut universitaire en santé mentale de Québec, Département de psychiatrie et de neurosciences, Université Laval, Québec, PQ, Canada
| | - Rachid El Fatimy
- Centre de recherche, Institut universitaire en santé mentale de Québec, Département de psychiatrie et de neurosciences, Université Laval, Québec, PQ, Canada
| | - Hassan Nassour
- Centre de recherche du CHU de Québec. Département de biologie moléculaire, biochimie médicale et pathologie, Université Laval, Québec, PQ, Canada
| | - Cristina Gareau
- Centre de recherche du CHU de Québec. Département de biologie moléculaire, biochimie médicale et pathologie, Université Laval, Québec, PQ, Canada
| | - Jérôme Lang
- Centre de recherche, Institut universitaire en santé mentale de Québec, Département de psychiatrie et de neurosciences, Université Laval, Québec, PQ, Canada
| | - Robert M. Tanguay
- Laboratoire de génétique cellulaire et du développement, Département de biologie moléculaire, biochimie médicale et pathologie, Université Laval, Québec, PQ, Canada
| | - Rachid Mazroui
- Centre de recherche du CHU de Québec. Département de biologie moléculaire, biochimie médicale et pathologie, Université Laval, Québec, PQ, Canada
| | - Edouard W. Khandjian
- Centre de recherche, Institut universitaire en santé mentale de Québec, Département de psychiatrie et de neurosciences, Université Laval, Québec, PQ, Canada
- * E-mail:
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Ureshino RP, Rocha KK, Lopes GS, Bincoletto C, Smaili SS. Calcium signaling alterations, oxidative stress, and autophagy in aging. Antioxid Redox Signal 2014; 21:123-37. [PMID: 24512092 DOI: 10.1089/ars.2013.5777] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
SIGNIFICANCE Aging is a multi-factorial process that may be associated with several functional and structural deficits which can evolve into degenerative diseases. In this review, we present data that may depict an expanded view of molecular aging theories, beginning with the idea that reactive oxygen species (ROS) are the major effectors in this process. In addition, we have correlated the importance of autophagy as a neuroprotective mechanism and discussed a link between age-related molecules, Ca(2+) signaling, and oxidative stress. RECENT ADVANCES There is evidence suggesting that alterations in Ca(2+) homeostasis, including mitochondrial Ca(2+) overload and alterations in electron transport chain (ETC) complexes, which increase cell vulnerability, are linked to oxidative stress in aging. As much as Ca(2+) signaling is altered in aged cells, excess ROS can be produced due to an ineffective coupling of mitochondrial respiration. Damaged mitochondria might not be removed by the macroautophagic system, which is hampered in aging by lipofuscin accumulation, boosting ROS generation, damaging DNA, and, ultimately, leading to apoptosis. CRITICAL ISSUES This process can lead to altered protein expression (such as p53, Sirt1, and IGF-1) and progress to cell death. This cycle can lead to increased cell vulnerability in aging and contribute to an increased susceptibility to degenerative processes. FUTURE DIRECTIONS A better understanding of Ca(2+) signaling and molecular aging alterations is important for preventing apoptosis in age-related diseases. In addition, caloric restriction, resveratrol and autophagy modulation appear to be predominantly cytoprotective, and further studies of this process are promising in age-related disease therapeutics.
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Ortolan TG, Menck CFM. UVB-induced cell death signaling is associated with G1-S progression and transcription inhibition in primary human fibroblasts. PLoS One 2013; 8:e76936. [PMID: 24155908 PMCID: PMC3796564 DOI: 10.1371/journal.pone.0076936] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Accepted: 09/04/2013] [Indexed: 11/19/2022] Open
Abstract
DNA damage induced by ultraviolet (UV) radiation can be removed by nucleotide excision repair through two sub-pathways, one general (GGR) and the other specific for transcribed DNA (TCR), and the processing of unrepaired lesions trigger signals that may lead to cell death. These signals involve the tumor suppressor p53 protein, a central regulator of cell responses to DNA damage, and the E3 ubiquitin ligase Mdm2, that forms a feedback regulatory loop with p53. The involvement of cell cycle and transcription on the signaling to apoptosis was investigated in UVB-irradiated synchronized, DNA repair proficient, CS-B (TCR-deficient) and XP-C (GGR-deficient) primary human fibroblasts. Cells were irradiated in the G1 phase of the cell cycle, with two doses with equivalent levels of apoptosis (low and high), defined for each cell line. In the three cell lines, the low doses of UVB caused only a transient delay in progression to the S phase, whereas the high doses induced permanent cell cycle arrest. However, while accumulation of Mdm2 correlated well with the recovery from transcription inhibition at the low doses for normal and CS-B fibroblasts, for XP-C cells this protein was shown to be accumulated even at UVB doses that induced high levels of apoptosis. Thus, UVB-induced accumulation of Mdm2 is critical for counteracting p53 activation and apoptosis avoidance, but its effect is limited due to transcription inhibition. However, in the case of XP-C cells, an excess of unrepaired DNA damage would be sufficient to block S phase progression, which would signal to apoptosis, independent of Mdm2 accumulation. The data clearly discriminate DNA damage signals that lead to cell death, depending on the presence of UVB-induced DNA damage in replicating or transcribing regions.
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Affiliation(s)
- Tatiana Grohmann Ortolan
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, SP, Brazil
| | - Carlos Frederico M. Menck
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, SP, Brazil
- * E-mail:
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McFeat GD, Allinson SL, McMillan TJ. Characterisation of the p53-mediated cellular responses evoked in primary mouse cells following exposure to ultraviolet radiation. PLoS One 2013; 8:e75800. [PMID: 24098727 PMCID: PMC3786933 DOI: 10.1371/journal.pone.0075800] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 08/20/2013] [Indexed: 12/24/2022] Open
Abstract
Exposure to ultraviolet (UV) light can cause significant damage to mammalian cells and, although the spectrum of damage produced varies with the wavelength of UV, all parts of the UV spectrum are recognised as being detrimental to human health. Characterising the cellular response to different wavelengths of UV therefore remains an important aim so that risks and their moderation can be evaluated, in particular in relation to the initiation of skin cancer. The p53 tumour suppressor protein is central to the cellular response that protects the genome from damage by external agents such as UV, thus reducing the risk of tumorigenesis. In response to a variety of DNA damaging agents including UV light, wild-type p53 plays a role in mediating cell-cycle arrest, facilitating apoptosis and stimulating repair processes, all of which prevent the propagation of potentially mutagenic defects. In this study we examined the induction of p53 protein and its influence on the survival of primary mouse fibroblasts exposed to different wavelengths of UV light. UVC was found to elevate p53 protein and its sequence specific DNA binding capacity. Unexpectedly, UVA treatment failed to induce p53 protein accumulation or sequence specific DNA binding. Despite this, UVA exposure of wild-type cells induced a p53 dependent G1 cell cycle arrest followed by a wave of p53 dependent apoptosis, peaking 12 hours post-insult. Thus, it is demonstrated that the elements of the p53 cellular response evoked by exposure to UV radiation are wavelength dependent. Furthermore, the interrelationship between various endpoints is complex and not easily predictable. This has important implications not only for understanding the mode of action of p53 but also for the use of molecular endpoints in quantifying exposure to different wavelengths of UV in the context of human health protection.
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Affiliation(s)
- Gillian D. McFeat
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, United Kingdom
| | - Sarah L. Allinson
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, United Kingdom
| | - Trevor J. McMillan
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, United Kingdom
- * E-mail:
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48
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A comparative study of UV-induced cell signalling pathways in human keratinocyte-derived cell lines. Arch Dermatol Res 2013; 305:817-33. [PMID: 24071771 DOI: 10.1007/s00403-013-1412-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 09/01/2013] [Accepted: 09/06/2013] [Indexed: 01/01/2023]
Abstract
Ultraviolet (UV) radiation can activate the p38 mitogen-activated protein kinase (MAPK), Jun N-terminal kinase (JNK) and nuclear factor-κB (NFκB) pathways in skin cells. HaCaT cells are widely used as a primary keratinocyte substitute to study these pathways. However, like most squamous cell carcinomas (SCCs), it contains a dysfunctional p53. It is unclear if HaCaT cells activate these signalling pathways similarly to SCC cells (Colo16) or to primary human epidermal keratinocytes (HEK). In this study, the UV activation (UVA, UVB, UVA+B, UVB+A) of p38 MAPK, JNK and NFκB pathways, and TNFα secretion by HEK, HaCaT and Colo16 cells were investigated. The signalling pathway activation was UV-type and dose-dependent with UVB+A radiation inducing a high p38 and JNK activation. HaCaT cells exhibited 2- to 4-fold higher activity of the p38 (771% at 60 min) and JNK (794% at 30 min) pathways following UVB+A radiation than did HEK cells (p38: 367% at 15 min and JNK: 184% at 30 min). While both HaCaT and Colo16 cells did not activate the NFκB pathway, Colo16 cells had a lower p38 and higher JNK activity than HaCaT cells. Irradiated HaCaT cells produced less TNFα (UVB: 3.5 pg/ml), while HEK cells produced the most (UVB: 1,296 pg/ml). When co-exposed to IL1α, irradiated HaCaT had the greatest fold of TNFα release (UVB: 16.2-fold, UVA+B: 8.9-fold and UVB+A: 6.1-fold). The pattern of activation and TNFα secretion of HaCaT cells mirrored that of Colo16 cells. It is likely that the presence of molecular alterations in HaCaT cells may be responsible for its different responses to that seen for HEK cells. The results of this study suggest caution in using HaCaT cells as a substitute for normal keratinocytes in investigating UV-induced cells signalling pathways.
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49
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Sung YH, Jin Y, Kang Y, Devkota S, Lee J, Roh JI, Lee HW. Ei24, a novel E2F target gene, affects p53-independent cell death upon ultraviolet C irradiation. J Biol Chem 2013; 288:31261-7. [PMID: 24014029 DOI: 10.1074/jbc.m113.477570] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The deficiency of retinoblastoma (Rb) gene deregulates E2F transcription factors and thus induces E2F target genes directly or p53 target genes indirectly via mouse p19(Arf) (or p14(ARF) in humans), an E2F target gene. Here, we identified that etoposide-induced 2.4 mRNA (Ei24)/p53-induced gene 8 (Pig8), a p53 target gene involved in apoptosis and autophagy, was up-regulated in Rb(-/-) mouse embryonic fibroblasts (MEFs). The Ei24 promoter was activated by E2F1 via multiple E2F-responsive elements, independently of the previously reported p53-responsive element. Chromatin immunoprecipitation assays revealed that E2F1 directly acts on the mouse Ei24 promoter. We observed that Ei24 expression was suppressed in p53(-/-) MEFs upon UVC irradiation, which was exacerbated in p53(-/-) E2f1(-/-) MEFs, supporting the positive role of E2F1 on Ei24 transcription. Furthermore, Ei24 knockdown sensitized p53(-/-) MEFs against UVC irradiation. Together, our data indicate that Ei24 is a novel E2F target gene contributing to the survival of p53-deficient cells upon UVC irradiation and thus may have a potential significance as a therapeutic target of certain chemotherapy for treating p53-deficient tumors.
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Affiliation(s)
- Young Hoon Sung
- From the Department of Biochemistry, College of Life Science and Biotechnology, and Laboratory Animal Research Center, Yonsei University, Seoul 120-749, Korea and
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Repeated exposure of mouse dermal fibroblasts at a sub-cytotoxic dose of UVB leads to premature senescence: a robust model of cellular photoaging. J Dermatol Sci 2013; 73:49-56. [PMID: 24054498 DOI: 10.1016/j.jdermsci.2013.08.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 08/20/2013] [Accepted: 08/26/2013] [Indexed: 01/14/2023]
Abstract
BACKGROUND Photoaging skin is due to accumulative effect of UV irradiation that mainly imposes its damage on dermal fibroblasts. To mimic the specific cellular responses invoked by long term effect of UVB, it is preferable to develop a photo-damaged model in vitro based on repeated UVB exposure instead of a single exposure. OBJECTIVE To develop a photo-damaged model of fibroblasts by repeated UVB exposure allowing for investigation of molecular mechanism underlying premature senescence and testing of potential anti-photoaging compounds. METHODS Mouse dermal fibroblasts (MDFs) at early passages (passages 1-3) were exposed to a series of 4 sub-cytotoxic dose of UVB. The senescent phenotypes were detected at 24 or 48h after the last irradiation including cell viability, ROS generation, mitochondrial membrane potential, cell cycle, production and degradation of extracellular matrix. RESULTS Repeated exposure of UVB resulted in remarkable features of senescence. It effectively avoided the disadvantages of single dose such as induction of cell death rather than senescence, inadequate stress resulting in cellular self-rehabilitation. CONCLUSION Our work confirms the possibility of detecting cellular machinery that mediates UVB damage to fibroblasts in vitro by repeated exposure, while the potential molecular mechanisms including cell surface receptors, protein kinase signal transduction pathways, and transcription factors remain to be further evaluated.
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