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Murayama T, Nakayama J, Jiang X, Miyata K, Morris AD, Cai KQ, Prasad RM, Ma X, Efimov A, Belani N, Gerstein ER, Tan Y, Zhou Y, Kim W, Maruyama R, Campbell KS, Chen L, Yang Y, Balachandran S, Cañadas I. Targeting DHX9 Triggers Tumor-Intrinsic Interferon Response and Replication Stress in Small Cell Lung Cancer. Cancer Discov 2024; 14:468-491. [PMID: 38189443 PMCID: PMC10905673 DOI: 10.1158/2159-8290.cd-23-0486] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 11/20/2023] [Accepted: 01/03/2024] [Indexed: 01/09/2024]
Abstract
Activating innate immunity in cancer cells through cytoplasmic nucleic acid sensing pathways, a phenomenon known as "viral mimicry," has emerged as an effective strategy to convert immunologically "cold" tumors into "hot." Through a curated CRISPR-based screen of RNA helicases, we identified DExD/H-box helicase 9 (DHX9) as a potent repressor of double-stranded RNA (dsRNA) in small cell lung cancers (SCLC). Depletion of DHX9 induced accumulation of cytoplasmic dsRNA and triggered tumor-intrinsic innate immunity. Intriguingly, ablating DHX9 also induced aberrant accumulation of R-loops, which resulted in an increase of DNA damage-derived cytoplasmic DNA and replication stress in SCLCs. In vivo, DHX9 deletion promoted a decrease in tumor growth while inducing a more immunogenic tumor microenvironment, invigorating responsiveness to immune-checkpoint blockade. These findings suggest that DHX9 is a crucial repressor of tumor-intrinsic innate immunity and replication stress, representing a promising target for SCLC and other "cold" tumors in which genomic instability contributes to pathology. SIGNIFICANCE One promising strategy to trigger an immune response within tumors and enhance immunotherapy efficacy is by inducing endogenous "virus-mimetic" nucleic acid accumulation. Here, we identify DHX9 as a viral-mimicry-inducing factor involved in the suppression of double-stranded RNAs and R-loops and propose DHX9 as a novel target to enhance antitumor immunity. See related commentary by Chiappinelli, p. 389. This article is featured in Selected Articles from This Issue, p. 384.
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Affiliation(s)
- Takahiko Murayama
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Center for Immunology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Jun Nakayama
- Laboratory of Integrative Oncology, National Cancer Center Research Institute, Tokyo, Japan
- Department of Oncogenesis and Growth Regulation, Research Institute, Osaka International Cancer Institute, Osaka, Japan
| | - Xinpei Jiang
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Center for Immunology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Biomedical Science Graduate Program, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
| | - Kenichi Miyata
- Project for Cancer Epigenomics, Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan
- Cancer Cell Communication Project, NEXT-Ganken Program, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Alexander D. Morris
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Kathy Q. Cai
- Histopathology Facility, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Rahul M. Prasad
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Xueying Ma
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Center for Immunology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Andrey Efimov
- Bio Imaging Facility, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Neel Belani
- Department of Medical Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Emily R. Gerstein
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Yinfei Tan
- Genomics Facility, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Yan Zhou
- Biostatistics and Bioinformatics Facility, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - William Kim
- Moores Cancer Center, UC San Diego, La Jolla, California
- Center for Novel Therapeutics, UC San Diego, La Jolla, California
- Department of Medicine, UC San Diego, La Jolla, California
| | - Reo Maruyama
- Project for Cancer Epigenomics, Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan
- Cancer Cell Diversity Project, NEXT-Ganken Program, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Kerry S. Campbell
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Center for Immunology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Lu Chen
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Yibin Yang
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Center for Immunology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Siddharth Balachandran
- Center for Immunology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Signaling and Microenvironment Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Israel Cañadas
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Center for Immunology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
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Udroiu I, Marinaccio J, Sgura A. Effects of p53 and ATRX inhibition on telomeric recombination in aging fibroblasts. Front Oncol 2024; 14:1322438. [PMID: 38333682 PMCID: PMC10850245 DOI: 10.3389/fonc.2024.1322438] [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: 10/16/2023] [Accepted: 01/11/2024] [Indexed: 02/10/2024] Open
Abstract
In order to avoid replicative senescence, tumor cells must acquire a telomere maintenance mechanism. Beside telomerase activation, a minority of tumors employs a recombinational mechanism called Alternative Lengthening of Telomeres (ALT). Several studies have investigated the potential ALT stimulation by inactivation of ATRX in tumor cells, obtaining contrasting results. Differently, since ALT can be viewed as a mechanism to overcome telomere shortening-mediated replicative senescence, we have investigated the effects of the inhibition of ATRX and p53 in aging primary fibroblasts. We observed that senescence leads to a phenotype that seems permissive for ALT activity, i.e. high levels of ALT-associated PML bodies (APB), telomeric damage and telomeric cohesion. On the other hand, RAD51 is highly repressed and thus telomeric recombination, upon which the ALT machinery relies, is almost absent. Silencing of ATRX greatly increases telomeric recombination in young cells, but is not able to overcome senescence-induced repression of homologous recombination. Conversely, inhibition of both p53 and ATRX leads to a phenotype reminiscent of some aspects of ALT activity, with a further increase of APB, a decrease of telomere shortening (and increased proliferation) and, above all, an increase of telomeric recombination.
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Affiliation(s)
- Ion Udroiu
- Dipartimento di Scienze, Università “Roma Tre“, Rome, Italy
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Prochownik EV, Wang H. Lessons in aging from Myc knockout mouse models. Front Cell Dev Biol 2023; 11:1244321. [PMID: 37621775 PMCID: PMC10446843 DOI: 10.3389/fcell.2023.1244321] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 07/31/2023] [Indexed: 08/26/2023] Open
Abstract
Despite MYC being among the most intensively studied oncogenes, its role in normal development has not been determined as Myc-/- mice do not survival beyond mid-gestation. Myc ± mice live longer than their wild-type counterparts and are slower to accumulate many age-related phenotypes. However, Myc haplo-insufficiency likely conceals other important phenotypes as many high-affinity Myc targets genes continue to be regulated normally. By delaying Myc inactivation until after birth it has recently been possible to study the consequences of its near-complete total body loss and thus to infer its normal function. Against expectation, these "MycKO" mice lived significantly longer than control wild-type mice but manifested a marked premature aging phenotype. This seemingly paradoxical behavior was potentially explained by a >3-fold lower lifetime incidence of cancer, normally the most common cause of death in mice and often Myc-driven. Myc loss accelerated the accumulation of numerous "Aging Hallmarks", including the loss of mitochondrial and ribosomal structural and functional integrity, the generation of reactive oxygen species, the acquisition of genotoxic damage, the detrimental rewiring of metabolism and the onset of senescence. In both mice and humans, normal aging in many tissues was accompaniued by the downregulation of Myc and the loss of Myc target gene regulation. Unlike most mouse models of premature aging, which are based on monogenic disorders of DNA damage recognition and repair, the MycKO mouse model directly impacts most Aging Hallmarks and may therefore more faithfully replicate the normal aging process of both mice and humans. It further establishes that the strong association between aging and cancer can be genetically separated and is maintained by a single gene.
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Affiliation(s)
- Edward V. Prochownik
- Division of Hematology/Oncology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA, United States
- The Department of Microbiology and Molecular Genetics, UPMC, Pittsburgh, PA, United States
- The Hillman Cancer Center of UPMC, Pittsburgh, PA, United States
- The Pittsburgh Liver Research Center, UPMC, Pittsburgh, PA, United States
| | - Huabo Wang
- Division of Hematology/Oncology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA, United States
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Wörthmüller J, Disler S, Pradervand S, Richard F, Haerri L, Ruiz Buendía GA, Fournier N, Desmedt C, Rüegg C. MAGI1 Prevents Senescence and Promotes the DNA Damage Response in ER + Breast Cancer. Cells 2023; 12:1929. [PMID: 37566008 PMCID: PMC10417439 DOI: 10.3390/cells12151929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/30/2023] [Accepted: 07/18/2023] [Indexed: 08/12/2023] Open
Abstract
MAGI1 acts as a tumor suppressor in estrogen receptor-positive (ER+) breast cancer (BC), and its loss correlates with a more aggressive phenotype. To identify the pathways and events affected by MAGI1 loss, we deleted the MAGI1 gene in the ER+ MCF7 BC cell line and performed RNA sequencing and functional experiments in vitro. Transcriptome analyses revealed gene sets and biological processes related to estrogen signaling, the cell cycle, and DNA damage responses affected by MAGI1 loss. Upon exposure to TNF-α/IFN-γ, MCF7 MAGI1 KO cells entered a deeper level of quiescence/senescence compared with MCF7 control cells and activated the AKT and MAPK signaling pathways. MCF7 MAGI1 KO cells exposed to ionizing radiations or cisplatin had reduced expression of DNA repair proteins and showed increased sensitivity towards PARP1 inhibition using olaparib. Treatment with PI3K and AKT inhibitors (alpelisib and MK-2206) restored the expression of DNA repair proteins and sensitized cells to fulvestrant. An analysis of human BC patients' transcriptomic data revealed that patients with low MAGI1 levels had a higher tumor mutational burden and homologous recombination deficiency. Moreover, MAGI1 expression levels negatively correlated with PI3K/AKT and MAPK signaling, which confirmed our in vitro observations. Pharmacological and genomic evidence indicate HDACs as regulators of MAGI1 expression. Our findings provide a new view on MAGI1 function in cancer and identify potential treatment options to improve the management of ER+ BC patients with low MAGI1 levels.
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Affiliation(s)
- Janine Wörthmüller
- Laboratory of Experimental and Translational Oncology, Department of Oncology, Microbiology and Immunology (OMI), Faculty of Science and Medicine, University of Fribourg, 1700 Fribourg, Switzerland
| | - Simona Disler
- Laboratory of Experimental and Translational Oncology, Department of Oncology, Microbiology and Immunology (OMI), Faculty of Science and Medicine, University of Fribourg, 1700 Fribourg, Switzerland
| | - Sylvain Pradervand
- Lausanne Genomic Technologies Facility (LGTF), University of Lausanne, 1015 Lausanne, Switzerland
| | - François Richard
- Laboratory for Translational Breast Cancer Research, KU Leuven, 3000 Leuven, Belgium
| | - Lisa Haerri
- Laboratory of Experimental and Translational Oncology, Department of Oncology, Microbiology and Immunology (OMI), Faculty of Science and Medicine, University of Fribourg, 1700 Fribourg, Switzerland
| | - Gustavo A. Ruiz Buendía
- Translational Data Science-Facility, AGORA Cancer Research Center, Swiss Institute of Bioinformatics (SIB), Bugnon 25A, 1005 Lausanne, Switzerland
| | - Nadine Fournier
- Translational Data Science-Facility, AGORA Cancer Research Center, Swiss Institute of Bioinformatics (SIB), Bugnon 25A, 1005 Lausanne, Switzerland
| | - Christine Desmedt
- Laboratory for Translational Breast Cancer Research, KU Leuven, 3000 Leuven, Belgium
| | - Curzio Rüegg
- Laboratory of Experimental and Translational Oncology, Department of Oncology, Microbiology and Immunology (OMI), Faculty of Science and Medicine, University of Fribourg, 1700 Fribourg, Switzerland
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Kandhaya-Pillai R, Miro-Mur F, Alijotas-Reig J, Tchkonia T, Schwartz S, Kirkland JL, Oshima J. Key elements of cellular senescence involve transcriptional repression of mitotic and DNA repair genes through the p53-p16/RB-E2F-DREAM complex. Aging (Albany NY) 2023; 15:4012-4034. [PMID: 37219418 PMCID: PMC10258023 DOI: 10.18632/aging.204743] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 05/03/2023] [Indexed: 05/24/2023]
Abstract
Cellular senescence is a dynamic stress response process that contributes to aging. From initiation to maintenance, senescent cells continuously undergo complex molecular changes and develop an altered transcriptome. Understanding how the molecular architecture of these cells evolve to sustain their non-proliferative state will open new therapeutic avenues to alleviate or delay the consequences of aging. Seeking to understand these molecular changes, we studied the transcriptomic profiles of endothelial replication-induced senescence and senescence induced by the inflammatory cytokine, TNF-α. We previously reported gene expressional pattern, pathways, and the mechanisms associated with upregulated genes during TNF-α induced senescence. Here, we extend our work and find downregulated gene signatures of both replicative and TNF-α senescence were highly overlapped, involving the decreased expression of several genes associated with cell cycle regulation, DNA replication, recombination, repair, chromatin structure, cellular assembly, and organization. We identified multiple targets of p53/p16-RB-E2F-DREAM that are essential for proliferation, mitotic progression, resolving DNA damage, maintaining chromatin integrity, and DNA synthesis that were repressed in senescent cells. We show that repression of multiple target genes in the p53/p16-RB-E2F-DREAM pathway collectively contributes to the stability of the senescent arrest. Our findings show that the regulatory connection between DREAM and cellular senescence may play a potential role in the aging process.
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Affiliation(s)
- Renuka Kandhaya-Pillai
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA
- Systemic Autoimmune Diseases Research Unit, Vall d’Hebron Research Institute (VHIR), Barcelona 08035, Spain
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN 55905, USA
| | - Francesc Miro-Mur
- Systemic Autoimmune Diseases Research Unit, Vall d’Hebron Research Institute (VHIR), Barcelona 08035, Spain
| | - Jaume Alijotas-Reig
- Systemic Autoimmune Diseases Research Unit, Vall d’Hebron Research Institute (VHIR), Barcelona 08035, Spain
| | - Tamar Tchkonia
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN 55905, USA
- Department of Physiology, Mayo Clinic, Rochester, MN 55905, USA
| | - Simo Schwartz
- Drug Delivery and Targeting Group, Clinical Biochemistry Department, Vall d’Hebron Hospital, Barcelona 08035, Spain
| | - James L. Kirkland
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN 55905, USA
- Department of Physiology, Mayo Clinic, Rochester, MN 55905, USA
- Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Junko Oshima
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA
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6
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Zhou J, Liu K, Bauer C, Bendner G, Dietrich H, Slivka JP, Wink M, Wong MBF, Chan MKS, Skutella T. Modulation of Cellular Senescence in HEK293 and HepG2 Cells by Ultrafiltrates UPla and ULu Is Partly Mediated by Modulation of Mitochondrial Homeostasis under Oxidative Stress. Int J Mol Sci 2023; 24:6748. [PMID: 37047720 PMCID: PMC10095350 DOI: 10.3390/ijms24076748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 03/31/2023] [Accepted: 04/03/2023] [Indexed: 04/08/2023] Open
Abstract
Protein probes, including ultrafiltrates from the placenta (UPla) and lung (ULu) of postnatal rabbits, were investigated in premature senescent HEK293 and HepG2 cells to explore whether they could modulate cellular senescence. Tris-Tricine-PAGE, gene ontology (GO), and LC-MS/MS analysis were applied to describe the characteristics of the ultrafiltrates. HEK293 and HepG2 cells (both under 25 passages) exposed to a sub-toxic concentration of hydrogen peroxide (H2O2, 300 μM) became senescent; UPla (10 μg/mL), ULu (10 μg/mL), as well as positive controls lipoic acid (10 μg/mL) and transferrin (10 μg/mL) were added along with H2O2 to the cells. Cell morphology; cellular proliferation; senescence-associated beta-galactosidase (SA-β-X-gal) activity; expression of senescence biomarkers including p16 INK4A (p16), p21 Waf1/Cip1 (p21), HMGB1, MMP-3, TNF-α, IL-6, lamin B1, and phospho-histone H2A.X (γ-H2AX); senescence-related gene expression; reactive oxygen species (ROS) levels; and mitochondrial fission were examined. Tris-Tricine-PAGE revealed prominent detectable bands between 10 and 100 kDa. LC-MS/MS identified 150-180 proteins and peptides in the protein probes, and GO analysis demonstrated a distinct enrichment of proteins associated with "extracellular space" and "proteasome core complex". UPla and ULu modulated senescent cell morphology, improved cell proliferation, and decreased beta-galactosidase activity, intracellular and mitochondrial ROS production, and mitochondrial fission caused by H2O2. The results from this study demonstrated that UPla and Ulu, as well as lipoic acid and transferrin, could protect HEK293 and HepG2 cells from H2O2-induced oxidative damage via protecting mitochondrial homeostasis and thus have the potential to be explored in anti-aging therapies.
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Affiliation(s)
- Junxian Zhou
- Institute for Anatomy and Cell Biology, Medical Faculty, Heidelberg University, 69120 Heidelberg, Germany
| | - Kang Liu
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing 210009, China
| | | | - Gerald Bendner
- Institute for Anatomy and Cell Biology, Medical Faculty, Heidelberg University, 69120 Heidelberg, Germany
| | - Heike Dietrich
- Institute for Anatomy and Cell Biology, Medical Faculty, Heidelberg University, 69120 Heidelberg, Germany
| | | | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, 69120 Heidelberg, Germany
| | | | - Mike K. S. Chan
- EW European Wellness International GmbH, 72184 Eutingen im Gäu, Germany
| | - Thomas Skutella
- Institute for Anatomy and Cell Biology, Medical Faculty, Heidelberg University, 69120 Heidelberg, Germany
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7
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Lidsky PV, Yuan J, Rulison JM, Andino-Pavlovsky R. Is Aging an Inevitable Characteristic of Organic Life or an Evolutionary Adaptation? BIOCHEMISTRY. BIOKHIMIIA 2022; 87:1413-1445. [PMID: 36717438 PMCID: PMC9839256 DOI: 10.1134/s0006297922120021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 09/27/2022] [Accepted: 11/04/2022] [Indexed: 01/15/2023]
Abstract
Aging is an evolutionary paradox. Several hypotheses have been proposed to explain it, but none fully explains all the biochemical and ecologic data accumulated over decades of research. We suggest that senescence is a primitive immune strategy which acts to protect an individual's kin from chronic infections. Older organisms are exposed to pathogens for a longer period of time and have a higher likelihood of acquiring infectious diseases. Accordingly, the parasitic load in aged individuals is higher than in younger ones. Given that the probability of pathogen transmission is higher within the kin, the inclusive fitness cost of infection might exceed the benefit of living longer. In this case, programmed lifespan termination might be an evolutionarily stable strategy. Here, we discuss the classical evolutionary hypotheses of aging and compare them with the pathogen control hypothesis, discuss the consistency of these hypotheses with existing empirical data, and present a revised conceptual framework to understand the evolution of aging.
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Affiliation(s)
- Peter V Lidsky
- Department of Microbiology and Immunology, University of California San Francisco, CA, USA.
| | - Jing Yuan
- Department of Microbiology and Immunology, University of California San Francisco, CA, USA
| | - Jacob M Rulison
- Department of Microbiology and Immunology, University of California San Francisco, CA, USA
- University of California Berkeley, CA, USA
| | - Raul Andino-Pavlovsky
- Department of Microbiology and Immunology, University of California San Francisco, CA, USA.
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8
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Daura E, Tegelberg S, Hakala P, Lehesjoki AE, Joensuu T. Cystatin B deficiency results in sustained histone H3 tail cleavage in postnatal mouse brain mediated by increased chromatin-associated cathepsin L activity. Front Mol Neurosci 2022; 15:1069122. [DOI: 10.3389/fnmol.2022.1069122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/14/2022] [Indexed: 12/05/2022] Open
Abstract
Cystatin B (CSTB) is a cysteine cathepsin inhibitor whose biallelic loss-of-function mutations in human result in defects in brain development and in neurodegeneration. The physiological function of CSTB is largely unknown, and the mechanisms underlying the human brain diseases remain poorly understood. We previously showed that CSTB modulates the proteolysis of the N-terminal tail of histone H3 (H3cs1) during in vitro neurogenesis. Here we investigated the significance of this mechanism in postnatal mouse brain. Spatiotemporal analysis of H3cs1 intensity showed that while H3cs1 in wild-type (wt) mice was found at varying levels during the first postnatal month, it was virtually absent in adult brain. We further showed that the high level of H3cs1 coincides with chromatin association of de novo synthesized cathepsin L suggesting a role for nuclear cathepsin L in brain development and maturation. On the contrary, the brains of Cstb–/– mice showed sustained H3cs1 proteolysis to adulthood with increased chromatin-associated cathepsin L activity, implying that CSTB regulates chromatin-associated cathepsin L activity in the postnatal mouse brain. As H3 tail proteolysis has been linked to cellular senescence in vitro, we explored the presence of several cellular senescence markers in the maturing Cstb–/– cerebellum, where we see increased levels of H3cs1. While several markers showed alterations in Cstb–/– mice, the results remained inconclusive regarding the association of deficient CSTB function with H3cs1-induced senescence. Together, we identify a molecular role for CSTB in brain with implications for brain development and disease.
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PAHSAs reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of Mdm2/p53. Proc Natl Acad Sci U S A 2022; 119:e2206923119. [PMID: 36375063 PMCID: PMC9704710 DOI: 10.1073/pnas.2206923119] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Senescence in pancreatic beta cells plays a major role in beta cell dysfunction, which leads to impaired glucose homeostasis and diabetes. Therefore, prevention of beta cell senescence could reduce the risk of diabetes. Treatment of nonobese diabetic (NOD) mice, a model of type 1 autoimmune diabetes (T1D), with palmitic acid hydroxy stearic acids (PAHSAs), a novel class of endogenous lipids with antidiabetic and antiinflammatory effects, delays the onset and reduces the incidence of T1D from 82% with vehicle treatment to 35% with PAHSAs. Here, we show that a major mechanism by which PAHSAs protect islets of the NOD mice is by directly preventing and reversing the initial steps of metabolic stress-induced senescence. In vitro PAHSAs increased Mdm2 expression, which decreases the stability of p53, a key inducer of senescence-related genes. In addition, PAHSAs enhanced expression of protective genes, such as those regulating DNA repair and glutathione metabolism and promoting autophagy. We demonstrate the translational relevance by showing that PAHSAs prevent and reverse early stages of senescence in metabolically stressed human islets by the same Mdm2 mechanism. Thus, a major mechanism for the dramatic effect of PAHSAs in reducing the incidence of type 1 diabetes in NOD mice is decreasing cellular senescence; PAHSAs may have a similar benefit in humans.
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10
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Structure of an Intranucleosomal DNA Loop That Senses DNA Damage during Transcription. Cells 2022; 11:cells11172678. [PMID: 36078089 PMCID: PMC9454427 DOI: 10.3390/cells11172678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/22/2022] [Accepted: 08/24/2022] [Indexed: 11/16/2022] Open
Abstract
Transcription through chromatin by RNA polymerase II (Pol II) is accompanied by the formation of small intranucleosomal DNA loops containing the enzyme (i-loops) that are involved in survival of core histones on the DNA and arrest of Pol II during the transcription of damaged DNA. However, the structures of i-loops have not been determined. Here, the structures of the intermediates formed during transcription through a nucleosome containing intact or damaged DNA were studied using biochemical approaches and electron microscopy. After RNA polymerase reaches position +24 from the nucleosomal boundary, the enzyme can backtrack to position +20, where DNA behind the enzyme recoils on the surface of the histone octamer, forming an i-loop that locks Pol II in the arrested state. Since the i-loop is formed more efficiently in the presence of SSBs positioned behind the transcribing enzyme, the loop could play a role in the transcription-coupled repair of DNA damage hidden in the chromatin structure.
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11
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Raynard C, Ma X, Huna A, Tessier N, Massemin A, Zhu K, Flaman J, Moulin F, Goehrig D, Medard J, Vindrieux D, Treilleux I, Hernandez‐Vargas H, Ducreux S, Martin N, Bernard D. NF-κB-dependent secretome of senescent cells can trigger neuroendocrine transdifferentiation of breast cancer cells. Aging Cell 2022; 21:e13632. [PMID: 35653631 PMCID: PMC9282844 DOI: 10.1111/acel.13632] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 04/22/2022] [Accepted: 05/08/2022] [Indexed: 12/14/2022] Open
Abstract
Cellular senescence is characterized by a stable proliferation arrest in response to stresses and the acquisition of a senescence-associated secretory phenotype, called SASP, composed of numerous factors including pro-inflammatory molecules, proteases, and growth factors. The SASP affects the environment of senescent cells, especially during aging, by inducing and modulating various phenotypes such as paracrine senescence, immune cell activity, and extracellular matrix deposition and organization, which critically impact various pathophysiological situations, including fibrosis and cancer. Here, we uncover a novel paracrine effect of the SASP: the neuroendocrine transdifferentiation (NED) of some epithelial cancer cells, evidenced both in the breast and prostate. Mechanistically, this effect is mediated by NF-κB-dependent SASP factors, and leads to an increase in intracellular Ca2+ levels. Consistently, buffering Ca2+ by overexpressing the CALB1 buffering protein partly reverts SASP-induced NED, suggesting that the SASP promotes NED through a SASP-induced Ca2+ signaling. Human breast cancer dataset analyses support that NED occurs mainly in p53 WT tumors and in older patients, in line with a role of senescent cells and its secretome, as they are increasing during aging. In conclusion, our work, uncovering SASP-induced NED in some cancer cells, paves the way for future studies aiming at better understanding the functional link between senescent cell accumulation during aging, NED and clinical patient outcome.
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Affiliation(s)
- Clotilde Raynard
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - Xingjie Ma
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
- Department of Intensive CareThe Affiliated Hospital of Yangzhou University, Yangzhou UniversityYangzhouChina
| | - Anda Huna
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - Nolwenn Tessier
- University of Lyon, CarMeN LaboratoryINSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1BronFrance
| | - Amélie Massemin
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - Kexin Zhu
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - Jean‐Michel Flaman
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - Florentin Moulin
- University of Lyon, CarMeN LaboratoryINSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1BronFrance
| | - Delphine Goehrig
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - Jean‐Jacques Medard
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - David Vindrieux
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - Isabelle Treilleux
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - Hector Hernandez‐Vargas
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - Sylvie Ducreux
- University of Lyon, CarMeN LaboratoryINSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1BronFrance
| | - Nadine Martin
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
| | - David Bernard
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon BérardUniversité de LyonLyonFrance
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12
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Provasek VE, Mitra J, Malojirao VH, Hegde ML. DNA Double-Strand Breaks as Pathogenic Lesions in Neurological Disorders. Int J Mol Sci 2022; 23:ijms23094653. [PMID: 35563044 PMCID: PMC9099445 DOI: 10.3390/ijms23094653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/19/2022] [Accepted: 04/19/2022] [Indexed: 02/07/2023] Open
Abstract
The damage and repair of DNA is a continuous process required to maintain genomic integrity. DNA double-strand breaks (DSBs) are the most lethal type of DNA damage and require timely repair by dedicated machinery. DSB repair is uniquely important to nondividing, post-mitotic cells of the central nervous system (CNS). These long-lived cells must rely on the intact genome for a lifetime while maintaining high metabolic activity. When these mechanisms fail, the loss of certain neuronal populations upset delicate neural networks required for higher cognition and disrupt vital motor functions. Mammalian cells engage with several different strategies to recognize and repair chromosomal DSBs based on the cellular context and cell cycle phase, including homologous recombination (HR)/homology-directed repair (HDR), microhomology-mediated end-joining (MMEJ), and the classic non-homologous end-joining (NHEJ). In addition to these repair pathways, a growing body of evidence has emphasized the importance of DNA damage response (DDR) signaling, and the involvement of heterogeneous nuclear ribonucleoprotein (hnRNP) family proteins in the repair of neuronal DSBs, many of which are linked to age-associated neurological disorders. In this review, we describe contemporary research characterizing the mechanistic roles of these non-canonical proteins in neuronal DSB repair, as well as their contributions to the etiopathogenesis of selected common neurological diseases.
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Affiliation(s)
- Vincent E. Provasek
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77030, USA; (V.E.P.); (V.H.M.)
- College of Medicine, Texas A&M University, College Station, TX 77843, USA
| | - Joy Mitra
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77030, USA; (V.E.P.); (V.H.M.)
- Correspondence: (J.M.); (M.L.H.)
| | - Vikas H. Malojirao
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77030, USA; (V.E.P.); (V.H.M.)
| | - Muralidhar L. Hegde
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77030, USA; (V.E.P.); (V.H.M.)
- College of Medicine, Texas A&M University, College Station, TX 77843, USA
- Department of Neurosciences, Weill Cornell Medical College, New York, NY 11021, USA
- Correspondence: (J.M.); (M.L.H.)
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13
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HiIDDD: a high-throughput imaging pipeline for the quantitative detection of DNA damage in primary human immune cells. Sci Rep 2022; 12:6335. [PMID: 35428779 PMCID: PMC9022135 DOI: 10.1038/s41598-022-10018-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 03/25/2022] [Indexed: 11/21/2022] Open
Abstract
DNA damage is a prominent biomarker for numerous diseases, including cancer, as well as for the aging process. Detection of DNA damage routinely relies on traditional microscopy or cytometric methods. However, these techniques are typically of limited throughput and are not ideally suited for large-scale longitudinal and population studies that require analysis of large sample sets. We have developed HiIDDD (High-throughput Immune cell DNA Damage Detection), a robust, quantitative and single-cell assay that measures DNA damage by high-throughput imaging using the two major DNA damage markers 53BP1 and \documentclass[12pt]{minimal}
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\begin{document}$$\upgamma$$\end{document}γ-H2AX. We demonstrate sensitive detection with low inter-assay variability of DNA damage in various types of freshly isolated and cryopreserved primary human immune cells, including CD4 + and CD8 + T cells, B cells and monocytes. As proof of principle, we demonstrate parallel batch processing of several immune cell types from multiple donors. We find common patterns of DNA damage in multiple immune cell types of donors of varying ages, suggesting that immune cell properties are specific to individuals. These results establish a novel high-throughput assay for the evaluation of DNA damage in large-scale studies.
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14
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Rentscher KE, Carroll JE, Polsky LR, Lamkin DM. Chronic stress increases transcriptomic indicators of biological aging in mouse bone marrow leukocytes. Brain Behav Immun Health 2022; 22:100461. [PMID: 35481228 PMCID: PMC9035650 DOI: 10.1016/j.bbih.2022.100461] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 04/10/2022] [Indexed: 01/13/2023] Open
Abstract
Research with animals and humans has demonstrated that chronic stress exposure can impact key biological aging pathways such as inflammation and DNA damage, suggesting a mechanism through which stress may increase risk for age-related disease. However, it is less clear whether these effects extend to other hallmarks of the aging process, such as cellular senescence. Male SCID mice were exposed to 14 days of restraint stress, with (n = 6) or without (n = 10) propranolol administration, or a non-stress control condition (n = 10). Normal femoral bone marrow leukocytes were isolated from engrafted leukemia cells that had been injected prior to the stressor, as the mice were also under a cancer challenge. We performed whole genome transcriptional profiling to assess indicators of biological aging: cell stress, DNA damage repair, cellular senescence markers p16INK4a and p21, and the pro-inflammatory senescence-associated secretory phenotype (SASP). ANCOVAs that adjusted for tumor load and Fisher's pairwise comparisons revealed that stressed mice had enhanced p16INK4a (p = .02) and p21 (p = .004), lower DNA damage repair (p < .001), and higher SASP (p = .03) gene expression than control mice. Stressed mice also showed up-regulated beta-adrenergic (CREB) and inflammatory (NF-кB, AP-1) and down-regulated cell stress (Nrf2) transcription factor activity relative to control mice (ps < .01). Propranolol reversed CREB and Nrf2 activity (ps < .03). Findings suggest that chronic stress exposure can impact several key biological aging pathways within bone marrow leukocytes and these effects may be partially mediated by sympathetic beta-adrenergic receptor activation.
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Affiliation(s)
- Kelly E. Rentscher
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, USA,Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles, USA,Jonsson Comprehensive Cancer Center, University of California, Los Angeles, USA,Department of Psychiatry and Behavioral Medicine, Medical College of Wisconsin, USA,Corresponding author. Department of Psychiatry and Behavioral Medicine, Medical College of Wisconsin, 1000 N. 92nd St., Milwaukee, WI, 53226, USA.
| | - Judith E. Carroll
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, USA,Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles, USA,Jonsson Comprehensive Cancer Center, University of California, Los Angeles, USA
| | - Lilian R. Polsky
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, USA
| | - Donald M. Lamkin
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, USA,Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles, USA,Jonsson Comprehensive Cancer Center, University of California, Los Angeles, USA
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15
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Romaniello D, Gelfo V, Pagano F, Ferlizza E, Sgarzi M, Mazzeschi M, Morselli A, Miano C, D'Uva G, Lauriola M. Senescence-associated reprogramming induced by interleukin-1 impairs response to EGFR neutralization. Cell Mol Biol Lett 2022; 27:20. [PMID: 35236282 PMCID: PMC8903543 DOI: 10.1186/s11658-022-00319-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 02/04/2022] [Indexed: 02/06/2023] Open
Abstract
Background EGFR targeting is currently the main treatment strategy for metastatic colorectal cancer (mCRC). Results of different clinical trials show that patients with wild-type KRAS and BRAF benefit from anti-EGFR monoclonal antibodies (moAbs) cetuximab (CTX) or panitumumab. Unfortunately, despite initial response, patients soon became refractory. Tumor heterogeneity and multiple escaping routes have been addressed as the main culprit, and, behind genomic alterations already described, changes in signaling pathways induced by drug pressure are emerging as mechanisms of acquired resistance. We previously reported an association between reduced sensitivity to CTX and increased expression of IL-1. However, how IL-1 mediates CTX resistance in mCRC is still unclear. Methods Under CTX treatment, the upregulation of IL-1R1 expression and a senescence program in sensitive colorectal cancer (CRC) cell lines is examined over time using qPCR, immunoblotting, and immunofluorescence. Results In sensitive CRC cells, IL-1 appeared responsible for a CTX-mediated G0 phase arrest. On the contrary, CTX-resistant CRC cells (CXR) maintained high mRNA levels of IL-1R1 and a post-senescence reprogramming, as indicated by increased SNAIL expression. Interestingly, treatment of CXR cells with a recombinant decoy, able to sequester the soluble form of IL-1, pushed CTX-resistant CRC cells back into a stage of senescence, thus blocking their proliferation. Our model suggests a trans-regulatory mechanism mediated by IL-1 on EGFR signaling. By establishing senescence and regulating EGFR activity and expression, IL-1 exposure ultimately bestows resistance. Conclusions To sum up, our findings point to the combined blockage of IL-1R and EGFR as a promising therapeutical approach to restore sensitivity to EGFR-targeting monoclonal antibodies. Supplementary Information The online version contains supplementary material available at 10.1186/s11658-022-00319-7.
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Affiliation(s)
- Donatella Romaniello
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138, Bologna, Italy.,Centre for Applied Biomedical Research (CRBA), Bologna University Hospital Authority St. Orsola-Malpighi Polyclinic, 40138, Bologna, Italy
| | - Valerio Gelfo
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138, Bologna, Italy.,Centre for Applied Biomedical Research (CRBA), Bologna University Hospital Authority St. Orsola-Malpighi Polyclinic, 40138, Bologna, Italy
| | - Federica Pagano
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138, Bologna, Italy
| | - Enea Ferlizza
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138, Bologna, Italy
| | - Michela Sgarzi
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138, Bologna, Italy.,Centre for Applied Biomedical Research (CRBA), Bologna University Hospital Authority St. Orsola-Malpighi Polyclinic, 40138, Bologna, Italy
| | - Martina Mazzeschi
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138, Bologna, Italy.,Centre for Applied Biomedical Research (CRBA), Bologna University Hospital Authority St. Orsola-Malpighi Polyclinic, 40138, Bologna, Italy
| | - Alessandra Morselli
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138, Bologna, Italy
| | - Carmen Miano
- National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), Bologna, Italy
| | - Gabriele D'Uva
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138, Bologna, Italy.,National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), Bologna, Italy
| | - Mattia Lauriola
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138, Bologna, Italy. .,Centre for Applied Biomedical Research (CRBA), Bologna University Hospital Authority St. Orsola-Malpighi Polyclinic, 40138, Bologna, Italy.
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16
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Sun J, Chen X, Ji X, Meng S, Wang W, Wang P, Bai J, Li Z, Chen Y. TRIM21 deficiency promotes cell proliferation and tumorigenesis via regulating p21 expression in ovarian cancer. Bioengineered 2022; 13:6024-6035. [PMID: 35226825 PMCID: PMC8973816 DOI: 10.1080/21655979.2022.2042134] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Tripartite motif-containing 21 (TRIM21) has been reported to have a cancer-promoting or anticancer effect in various tumors; however, its role in ovarian cancer (OC) remains to be elucidated. In this study, we explored the biological function of TRIM21 in OC progression and investigated the potential mechanisms. We found that TRIM21 was remarkably decreased in OC tissues and cell lines compared with adjacent-cancerous tissues and normal ovarian epithelium cell. Decreased expression of TRIM21 in OC patients was significantly correlated with shorter overall and disease-specific survival by The Cancer Genome Atlas database (TCGA) analysis. Functional assays revealed that TRIM21 inhibited the migration and invasion of OC cells; and that TRIM21 also obviously impaired cell proliferation by inhibiting cell cycle progression in vitro and in vivo. Taken together, our results suggest that TRIM21 may be a promising biomarker and target for OC diagnosis and treatment.
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Affiliation(s)
- Jieyun Sun
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Department of Obstetrics and Gynecology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Xintian Chen
- Cancer Institute, Xuzhou Medical University, Xuzhou, China
| | - Xueying Ji
- Department of Obstetrics and Gynecology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Sen Meng
- Cancer Institute, Xuzhou Medical University, Xuzhou, China
| | - Wenwen Wang
- Cancer Institute, Xuzhou Medical University, Xuzhou, China
| | - Pengfei Wang
- Cancer Institute, Xuzhou Medical University, Xuzhou, China
| | - Jin Bai
- Cancer Institute, Xuzhou Medical University, Xuzhou, China.,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Zhongwei Li
- Cancer Institute, Xuzhou Medical University, Xuzhou, China.,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Youguo Chen
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Soochow University, Suzhou, China
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17
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Unveiling E2F4, TEAD1 and AP-1 as regulatory transcription factors of the replicative senescence program by multi-omics analysis. Protein Cell 2022; 13:742-759. [PMID: 35023014 PMCID: PMC9233726 DOI: 10.1007/s13238-021-00894-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 11/26/2021] [Indexed: 01/10/2023] Open
Abstract
Senescence, a stable state of growth arrest, affects many physiological and pathophysiological processes, especially aging. Previous work has indicated that transcription factors (TFs) play a role in regulating senescence. However, a systematic study of regulatory TFs during replicative senescence (RS) using multi-omics analysis is still lacking. Here, we generated time-resolved RNA-seq, reduced representation bisulfite sequencing (RRBS) and ATAC-seq datasets during RS of mouse skin fibroblasts, which demonstrated that an enhanced inflammatory response and reduced proliferative capacity were the main characteristics of RS in both the transcriptome and epigenome. Through integrative analysis and genetic manipulations, we found that transcription factors E2F4, TEAD1 and AP-1 are key regulators of RS. Overexpression of E2f4 improved cellular proliferative capacity, attenuated SA-β-Gal activity and changed RS-associated differentially methylated sites (DMSs). Moreover, knockdown of Tead1 attenuated SA-β-Gal activity and partially altered the RS-associated transcriptome. In addition, knockdown of Atf3, one member of AP-1 superfamily TFs, reduced Cdkn2a (p16) expression in pre-senescent fibroblasts. Taken together, the results of this study identified transcription factors regulating the senescence program through multi-omics analysis, providing potential therapeutic targets for anti-aging.
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18
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Schwab N, Leung E, Hazrati LN. Cellular Senescence in Traumatic Brain Injury: Evidence and Perspectives. Front Aging Neurosci 2021; 13:742632. [PMID: 34650425 PMCID: PMC8505896 DOI: 10.3389/fnagi.2021.742632] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 09/03/2021] [Indexed: 12/14/2022] Open
Abstract
Mild traumatic brain injury (mTBI) can lead to long-term neurological dysfunction and increase one's risk of neurodegenerative disease. Several repercussions of mTBI have been identified and well-studied, including neuroinflammation, gliosis, microgliosis, excitotoxicity, and proteinopathy – however the pathophysiological mechanisms activating these pathways after mTBI remains controversial and unclear. Emerging research suggests DNA damage-induced cellular senescence as a possible driver of mTBI-related sequalae. Cellular senescence is a state of chronic cell-cycle arrest and inflammation associated with physiological aging, mood disorders, dementia, and various neurodegenerative pathologies. This narrative review evaluates the existing studies which identify DNA damage or cellular senescence after TBI (including mild, moderate, and severe TBI) in both experimental animal models and human studies, and outlines how cellular senescence may functionally explain both the molecular and clinical manifestations of TBI. Studies on this subject clearly show accumulation of various forms of DNA damage (including oxidative damage, single-strand breaks, and double-strand breaks) and senescent cells after TBI, and indicate that cellular senescence may be an early event after TBI. Further studies are required to understand the role of sex, cell-type specific mechanisms, and temporal patterns, as senescence may be a pathway of interest to target for therapeutic purposes including prognosis and treatment.
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Affiliation(s)
- Nicole Schwab
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.,The Hospital for Sick Children, Toronto, ON, Canada
| | - Emily Leung
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.,The Hospital for Sick Children, Toronto, ON, Canada
| | - Lili-Naz Hazrati
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.,The Hospital for Sick Children, Toronto, ON, Canada
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19
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Janelle V, Neault M, Lebel MÈ, De Sousa DM, Boulet S, Durrieu L, Carli C, Muzac C, Lemieux S, Labrecque N, Melichar HJ, Mallette FA, Delisle JS. p16 INK4a Regulates Cellular Senescence in PD-1-Expressing Human T Cells. Front Immunol 2021; 12:698565. [PMID: 34434190 PMCID: PMC8381277 DOI: 10.3389/fimmu.2021.698565] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 07/20/2021] [Indexed: 01/30/2023] Open
Abstract
T-cell dysfunction arising upon repeated antigen exposure prevents effective immunity and immunotherapy. Using various clinically and physiologically relevant systems, we show that a prominent feature of PD-1-expressing exhausted T cells is the development of cellular senescence features both in vivo and ex vivo. This is associated with p16INK4a expression and an impaired cell cycle G1 to S-phase transition in repeatedly stimulated T cells. We show that these T cells accumulate DNA damage and activate the p38MAPK signaling pathway, which preferentially leads to p16INK4a upregulation. However, in highly dysfunctional T cells, p38MAPK inhibition does not restore functionality despite attenuating senescence features. In contrast, p16INK4a targeting can improve T-cell functionality in exhausted CAR T cells. Collectively, this work provides insights into the development of T-cell dysfunction and identifies T-cell senescence as a potential target in immunotherapy.
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Affiliation(s)
- Valérie Janelle
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada
| | - Mathieu Neault
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada
| | - Marie-Ève Lebel
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada
| | - Dave Maurice De Sousa
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada.,Department of Microbiology, Infectious Diseases and Immunology, Université de Montréal, Montreal, QC, Canada
| | - Salix Boulet
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada
| | - Ludovic Durrieu
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada
| | - Cédric Carli
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada
| | - Chloé Muzac
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada
| | - Sébastien Lemieux
- Institute for Research in Immunology and Cancer, Université de Montréal, Montreal, QC, Canada.,Department of Biochemistry and Molecular Medicine, Université de Montréal, Montreal, QC, Canada
| | - Nathalie Labrecque
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada.,Department of Microbiology, Infectious Diseases and Immunology, Université de Montréal, Montreal, QC, Canada.,Department of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Heather J Melichar
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada.,Department of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Frédérick A Mallette
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada.,Department of Biochemistry and Molecular Medicine, Université de Montréal, Montreal, QC, Canada.,Department of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Jean-Sébastien Delisle
- Research Centre, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada.,Department of Medicine, Université de Montréal, Montreal, QC, Canada.,Division of Hematology-Oncology, Hôpital Maisonneuve-Rosemont, Montreal, QC, Canada
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20
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Sfera A, Osorio C, Maguire G, Rahman L, Afzaal J, Cummings M, Maldonado JC. COVID-19, ferrosenescence and neurodegeneration, a mini-review. Prog Neuropsychopharmacol Biol Psychiatry 2021; 109:110230. [PMID: 33373681 PMCID: PMC7832711 DOI: 10.1016/j.pnpbp.2020.110230] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/16/2020] [Accepted: 12/18/2020] [Indexed: 02/06/2023]
Abstract
Exacerbation of cognitive, motor and nonmotor symptoms have been described in critically ill COVID-19 patients, indicating that, like prior pandemics, neurodegenerative sequelae may mark the aftermath of this viral infection. Moreover, SARS-CoV-2, the causative agent of COVID-19 disease, was associated with hyperferritinemia and unfavorable prognosis in older individuals, suggesting virus-induced ferrosenescence. We have previously defined ferrosenescence as an iron-associated disruption of both the human genome and its repair mechanisms, leading to premature cellular senescence and neurodegeneration. As viruses replicate more efficiently in iron-rich senescent cells, they may have developed the ability to induce this phenotype in host tissues, predisposing to both immune dysfunction and neurodegenerative disorders. In this mini-review, we summarize what is known about the SARS-CoV-2-induced cellular senescence and iron dysmetabolism. We also take a closer look at immunotherapy with natural killer cells, angiotensin II receptor blockers ("sartans"), iron chelators and dipeptidyl peptidase 4 inhibitors ("gliptins") as adjunct treatments for both COVID-19 and its neurodegenerative complications.
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Affiliation(s)
- Adonis Sfera
- Patton State Hospital, California, United States of America.
| | | | - Gerald Maguire
- University of California, Riverside, United States of America
| | - Leah Rahman
- Patton State Hospital, California, United States of America
| | - Jafri Afzaal
- Patton State Hospital, California, United States of America
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21
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Ho CY, Dreesen O. Faces of cellular senescence in skin aging. Mech Ageing Dev 2021; 198:111525. [PMID: 34166688 DOI: 10.1016/j.mad.2021.111525] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/30/2021] [Accepted: 06/20/2021] [Indexed: 02/06/2023]
Abstract
The skin is comprised of different cell types with different proliferative capacities. Skin aging occurs with chronological age and upon exposure to extrinsic factors such as photodamage. During aging, senescent cells accumulate in different compartments of the human skin, leading to impaired skin physiology. Diverse skin cell types may respond differently to senescence-inducing stimuli and it is not clear how this results in aging-associated skin phenotypes and pathologies. This review aims to examine and provide an overview of current evidence of cellular senescence in the skin. We will focus on cellular characteristics and behaviour of different skin cell types undergoing senescence in the epidermis and dermis, with a particular focus on the complex interplay between mitochondrial dysfunction, autophagy and DNA damage pathways. We will also examine how the dermis and epidermis cope with the accumulation of DNA damage during aging.
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Affiliation(s)
- Chin Yee Ho
- Skin Research Institute of Singapore, 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
| | - Oliver Dreesen
- Skin Research Institute of Singapore, 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore.
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22
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Hufnagel M, Neuberger R, Wall J, Link M, Friesen A, Hartwig A. Impact of Differentiated Macrophage-Like Cells on the Transcriptional Toxicity Profile of CuO Nanoparticles in Co-Cultured Lung Epithelial Cells. Int J Mol Sci 2021; 22:ijms22095044. [PMID: 34068728 PMCID: PMC8126233 DOI: 10.3390/ijms22095044] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/22/2021] [Accepted: 05/05/2021] [Indexed: 02/07/2023] Open
Abstract
To mimic more realistic lung tissue conditions, co-cultures of epithelial and immune cells are one comparatively easy-to-use option. To reveal the impact of immune cells on the mode of action (MoA) of CuO nanoparticles (NP) on epithelial cells, A549 cells as a model for epithelial cells have been cultured with or without differentiated THP-1 cells, as a model for macrophages. After 24 h of submerged incubation, cytotoxicity and transcriptional toxicity profiles were obtained and compared between the cell culture systems. Dose-dependent cytotoxicity was apparent starting from 8.0 µg/cm2 CuO NP. With regard to gene expression profiles, no differences between the cell models were observed concerning metal homeostasis, oxidative stress, and DNA damage, confirming the known MoA of CuO NP, i.e., endocytotic particle uptake, intracellular particle dissolution within lysosomes with subsequent metal ion deliberation, increased oxidative stress, and genotoxicity. However, applying a co-culture of epithelial and macrophage-like cells, CuO NP additionally provoked a pro-inflammatory response involving NLRP3 inflammasome and pro-inflammatory transcription factor activation. This study demonstrates that the application of this easy-to-use advanced in vitro model is able to extend the detection of cellular effects provoked by nanomaterials by an immunological response and emphasizes the use of such models to address a more comprehensive MoA.
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Schwab N, Ju Y, Hazrati LN. Early onset senescence and cognitive impairment in a murine model of repeated mTBI. Acta Neuropathol Commun 2021; 9:82. [PMID: 33964983 PMCID: PMC8106230 DOI: 10.1186/s40478-021-01190-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 05/03/2021] [Indexed: 12/19/2022] Open
Abstract
Mild traumatic brain injury (mTBI) results in broad neurological symptoms and an increased risk of being diagnosed with a neurodegenerative disease later in life. While the immediate oxidative stress response and post-mortem pathology of the injured brain has been well studied, it remains unclear how early pathogenic changes may drive persistent symptoms and confer susceptibility to neurodegeneration. In this study we have used a mouse model of repeated mTBI (rmTBI) to identify early gene expression changes at 24 h or 7 days post-injury (7 dpi). At 24 h post-injury, gene expression of rmTBI mice shows activation of the DNA damage response (DDR) towards double strand DNA breaks, altered calcium and cell–cell signalling, and inhibition of cell death pathways. By 7 dpi, rmTBI mice had a gene expression signature consistent with induction of cellular senescence, activation of neurodegenerative processes, and inhibition of the DDR. At both timepoints gliosis, microgliosis, and axonal damage were evident in the absence of any gross lesion, and by 7 dpi rmTBI also mice had elevated levels of IL1β, p21, 53BP1, DNA2, and p53, supportive of DNA damage-induced cellular senescence. These gene expression changes reflect establishment of processes usually linked to brain aging and suggests that cellular senescence occurs early and most likely prior to the accumulation of toxic proteins. These molecular changes were accompanied by spatial learning and memory deficits in the Morris water maze. To conclude, we have identified DNA damage-induced cellular senescence as a repercussion of repeated mild traumatic brain injury which correlates with cognitive impairment. Pathways involved in senescence may represent viable treatment targets of post-concussive syndrome. Senescence has been proposed to promote neurodegeneration and appears as an effective target to prevent long-term complications of mTBI, such as chronic traumatic encephalopathy and other related neurodegenerative pathologies.
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Huna A, Griveau A, Vindrieux D, Jaber S, Flaman JM, Goehrig D, Azzi L, Médard JJ, Djebali S, Hernandez-Vargas H, Dante R, Payen L, Marvel J, Bertolino P, Aubert S, Dubus P, Bernard D. PLA2R1 promotes DNA damage and inhibits spontaneous tumor formation during aging. Cell Death Dis 2021; 12:190. [PMID: 33594040 PMCID: PMC7887270 DOI: 10.1038/s41419-021-03468-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 01/16/2021] [Accepted: 01/21/2021] [Indexed: 02/07/2023]
Abstract
Although aging is a major risk factor for most types of cancers, it is barely studied in this context. The transmembrane protein PLA2R1 (phospholipase A2 receptor) promotes cellular senescence, which can inhibit oncogene-induced tumor initiation. Functions and mechanisms of action of PLA2R1 during aging are largely unknown. In this study, we observed that old Pla2r1 knockout mice were more prone to spontaneously develop a wide spectrum of tumors compared to control littermates. Consistently, these knockout mice displayed increased Parp1, a master regulator of DNA damage repair, and decreased DNA damage, correlating with large human dataset analysis. Forced PLA2R1 expression in normal human cells decreased PARP1 expression, induced DNA damage and subsequent senescence, while the constitutive expression of PARP1 rescued cells from these PLA2R1-induced effects. Mechanistically, PARP1 expression is repressed by a ROS (reactive oxygen species)-Rb-dependent mechanism upon PLA2R1 expression. In conclusion, our results suggest that PLA2R1 suppresses aging-induced tumors by repressing PARP1, via a ROS-Rb signaling axis, and inducing DNA damage and its tumor suppressive responses.
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Affiliation(s)
- Anda Huna
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Audrey Griveau
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - David Vindrieux
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Sara Jaber
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Jean-Michel Flaman
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Delphine Goehrig
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Lamia Azzi
- INSERM U1053 Bordeaux Research in Translational Oncology, University of Bordeaux, Bordeaux Cedex, France
| | - Jean-Jacques Médard
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Sophia Djebali
- Centre International de Recherche en Infectiologie, Inserm U1111, CNRS, UMR5308, École Normale Supérieure de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Hector Hernandez-Vargas
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Robert Dante
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Léa Payen
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Jacqueline Marvel
- Centre International de Recherche en Infectiologie, Inserm U1111, CNRS, UMR5308, École Normale Supérieure de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Philippe Bertolino
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Sébastien Aubert
- Institut de Pathologie, Centre de Biologie Pathologie, CHRU de Lille, Faculté de Médecine, Université de Lille, Lille Cedex, France
| | - Pierre Dubus
- INSERM U1053 Bordeaux Research in Translational Oncology, University of Bordeaux, Bordeaux Cedex, France
- Plateau cellules tissus, CHU de Bordeaux, Pessac, France
| | - David Bernard
- Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France.
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Schwartz RE, Shokhirev MN, Andrade LR, Gutkind JS, Iglesias-Bartolome R, Shadel GS. Insights into epithelial cell senescence from transcriptome and secretome analysis of human oral keratinocytes. Aging (Albany NY) 2021; 13:4747-4777. [PMID: 33601339 PMCID: PMC7950289 DOI: 10.18632/aging.202658] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 01/21/2021] [Indexed: 01/08/2023]
Abstract
Senescent cells produce chronic inflammation that contributes to the diseases and debilities of aging. How this process is orchestrated in epithelial cells, the origin of human carcinomas, is poorly understood. We used human normal oral keratinocytes (NOKs) to elucidate senescence programs in a prototype primary mucosal epithelial cell that senesces spontaneously. While NOKs exhibit several typical facets of senescence, they also display distinct characteristics. These include expression of p21WAF1/CIP1 at early passages, making this common marker of senescence unreliable in NOKs. Transcriptome analysis by RNA-seq revealed specific commonalities with and differences from cancer cells, explicating the tumor avoidance role of senescence. Repression of DNA repair genes that correlated with downregulation of E2F1 mRNA and protein was observed for two donors; a divergent result was seen for the third. Using proteomic profiling of soluble (non-vesicular) and extracellular vesicle (EV) associated secretions, we propose additions to the senescence associated secretory phenotype, including HSP60, which localizes to the surface of EVs. Finally, EVs from senescent NOKs activate interferon pathway signaling in THP-1 monocytes in a STING-dependent manner and associate with mitochondrial and nuclear DNA. Our results highlight senescence changes in epithelial cells and how they might contribute to chronic inflammation and age-related diseases.
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Affiliation(s)
- Rachael E Schwartz
- Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies and University of California - San Diego, La Jolla, CA 92037, USA
| | - Maxim N Shokhirev
- Razavi Newman Integrative Genomics and Bioinformatics Core, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Leonardo R Andrade
- Waitt Advanced Biophotonics Core, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - J Silvio Gutkind
- Department of Pharmacology and Moores Cancer Center, University of California - San Diego, La Jolla, CA 92093, USA
| | - Ramiro Iglesias-Bartolome
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Gerald S Shadel
- Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies and University of California - San Diego, La Jolla, CA 92037, USA
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26
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Tombuloglu A, Copoglu H, Aydin-Son Y, Guray NT. In vitro effects of boric acid on human liver hepatoma cell line (HepG2) at the half-maximal inhibitory concentration. J Trace Elem Med Biol 2020; 62:126573. [PMID: 32534377 DOI: 10.1016/j.jtemb.2020.126573] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/18/2020] [Accepted: 05/26/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Boron is a prominent part of the human diet and one of the essential trace elements for humans. Dietary boron is mostly transformed into boric acid within the body and has been associated with desirable health outcomes. Non-dietary resources of boron, such as boron-based drugs and occupational exposure, might lead to excessive boron levels in the blood and provoke health adversities. The liver might be particularly sensitive to boron intake with ample evidence suggesting a relation between boron and liver function, although the underlying molecular processes remain largely unknown. METHODS In order to better understand boron-related metabolism and molecular mechanisms associated with a cytotoxic level of boric acid, the half-maximal inhibitory concentration (IC50) of boric acid for the hepatoma cell line (HepG2) was determined using the XTT assay. Cellular responses followed by boric acid treatment at this concentration were investigated using genotoxicity assays and microarray hybridizations. Enrichment analyses were carried out to find out over-represented biological processes using the list of differentially expressed genes identified within the gene expression analysis. RESULTS DNA breaks were detected in HepG2 cells treated with 24 mM boric acid, the estimated IC50-level of boric acid. On the other hand, pleiotropic transcriptomic effects, including cell cycle arrest, DNA repair, and apoptosis as well as altered expression of Phase I and Phase II enzymes, amino acid metabolism, and lipid metabolism were discerned in microarray analyses. CONCLUSION HepG2 cells treated with a growth-inhibitory concentration of boric acid for 24 h exhibited a senescence-like transcriptomic profile along with DNA damage. Further studies might help in understanding the concentration-dependent effects and mechanisms of boric acid.
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Affiliation(s)
- Aysegul Tombuloglu
- Middle East Technical University, Graduate School of Informatics, Health Informatics Department, Ankara, Turkey
| | - Hulya Copoglu
- Middle East Technical University, Graduate School of Arts and Sciences, Department of Biological Sciences, Ankara, Turkey
| | - Yesim Aydin-Son
- Middle East Technical University, Graduate School of Informatics, Health Informatics Department, Ankara, Turkey
| | - N Tulin Guray
- Middle East Technical University, Graduate School of Arts and Sciences, Department of Biological Sciences, Ankara, Turkey.
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Nicaise AM, Willis CM, Crocker SJ, Pluchino S. Stem Cells of the Aging Brain. Front Aging Neurosci 2020; 12:247. [PMID: 32848716 PMCID: PMC7426063 DOI: 10.3389/fnagi.2020.00247] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 07/20/2020] [Indexed: 12/12/2022] Open
Abstract
The adult central nervous system (CNS) contains resident stem cells within specific niches that maintain a self-renewal and proliferative capacity to generate new neurons, astrocytes, and oligodendrocytes throughout adulthood. Physiological aging is associated with a progressive loss of function and a decline in the self-renewal and regenerative capacities of CNS stem cells. Also, the biggest risk factor for neurodegenerative diseases is age, and current in vivo and in vitro models of neurodegenerative diseases rarely consider this. Therefore, combining both aging research and appropriate interrogation of animal disease models towards the understanding of the disease and age-related stem cell failure is imperative to the discovery of new therapies. This review article will highlight the main intrinsic and extrinsic regulators of neural stem cell (NSC) aging and discuss how these factors impact normal homeostatic functions within the adult brain. We will consider established in vivo animal and in vitro human disease model systems, and then discuss the current and future trajectories of novel senotherapeutics that target aging NSCs to ameliorate brain disease.
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Affiliation(s)
- Alexandra M Nicaise
- Department of Clinical Neurosciences and NIHR Biomedical Research Centre, University of Cambridge, Cambridge, United Kingdom
| | - Cory M Willis
- Department of Clinical Neurosciences and NIHR Biomedical Research Centre, University of Cambridge, Cambridge, United Kingdom
| | - Stephen J Crocker
- Department of Neuroscience, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Stefano Pluchino
- Department of Clinical Neurosciences and NIHR Biomedical Research Centre, University of Cambridge, Cambridge, United Kingdom
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28
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Sha J, Arbesman J, Harter ML. Premature senescence in human melanocytes after exposure to solar UVR: An exosome and UV-miRNA connection. Pigment Cell Melanoma Res 2020; 33:671-684. [PMID: 32386350 DOI: 10.1111/pcmr.12888] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 04/27/2020] [Accepted: 05/02/2020] [Indexed: 01/10/2023]
Abstract
Ultraviolet radiation (UVR) can play two roles: induce cellular senescence and convert skin melanocytes into melanoma. To assess whether this conversion might rely on melanocytes having to first acquire a senescent phenotype, we studied the effects of physiological doses of UVR (UVA + UVB) on quiescent melanocytes in vitro. Repeated doses of UVR induced these melanocytes into a senescent-like state. Additionally, these cells secrete exosomes with specific miRNAs that differ in quantity from those of the un-irradiated melanocytes. Many of the exosomal miRNAs that were differentially enriched regulated genes comprising a "senescence core signature" and encoding factors of the senescence-messaging secretome (SASP), while a subset of the differentially reduced miRNAs targeted DNA repair genes that have been experimentally shown to be repressed in senescent melanocytes. Thus, the selection of specific miRNAs by exosomes and their release from melanocytes after exposure to UVR have activities in inducing these cells into premature senescence.
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Affiliation(s)
- Jingfeng Sha
- Department of Biochemistry, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Joshua Arbesman
- Dermatology and Plastic Surgery Institute and Cancer Biology, Cleveland Clinic, Cleveland, OH, USA
| | - Marian L Harter
- Department of Biochemistry, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
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29
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Shen T, Li H, Song Y, Li L, Lin J, Wei G, Ni T. Alternative polyadenylation dependent function of splicing factor SRSF3 contributes to cellular senescence. Aging (Albany NY) 2020; 11:1356-1388. [PMID: 30835716 PMCID: PMC6428108 DOI: 10.18632/aging.101836] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 02/17/2019] [Indexed: 12/18/2022]
Abstract
Down-regulated splicing factor SRSF3 is known to promote cellular senescence, an important biological process in preventing cancer and contributing to individual aging, via its alternative splicing dependent function in human cells. Here we discovered alternative polyadenylation (APA) dependent function of SRSF3 as a novel mechanism explaining SRSF3 downregulation induced cellular senescence. Knockdown of SRSF3 resulted in preference usage of proximal poly(A) sites and thus global shortening of 3′ untranslated regions (3′ UTRs) of mRNAs. SRSF3-depletion also induced senescence-related phenotypes in both human and mouse cells. These 3′ UTR shortened genes were enriched in senescence-associated pathways. Shortened 3′ UTRs tended to produce more proteins than the longer ones. Simulating the effects of 3′ UTR shortening by overexpression of three candidate genes (PTEN, PIAS1 and DNMT3A) all led to senescence-associated phenotypes. Mechanistically, SRSF3 has higher binding density near proximal poly(A) site than distal one in 3′ UTR shortened genes. Further, upregulation of PTEN by either ectopic overexpression or SRSF3-knockdown induction both led to reduced phosphorylation of AKT and ultimately senescence-associated phenotypes. We revealed for the first time that reduced SRSF3 expression could promote cellular senescence through its APA-dependent function, largely extending our mechanistic understanding in splicing factor regulated cellular senescence.
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Affiliation(s)
- Ting Shen
- State Key Laboratory of Genetic Engineering and Ministry of Education (MOE) Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center of Genetics and Development, Human Phenome Institute, School of Life Sciences and Huashan Hospital, Fudan University, Shanghai 200438, China
| | - Huan Li
- State Key Laboratory of Genetic Engineering and Ministry of Education (MOE) Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center of Genetics and Development, Human Phenome Institute, School of Life Sciences and Huashan Hospital, Fudan University, Shanghai 200438, China
| | - Yifang Song
- State Key Laboratory of Genetic Engineering and Ministry of Education (MOE) Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center of Genetics and Development, Human Phenome Institute, School of Life Sciences and Huashan Hospital, Fudan University, Shanghai 200438, China
| | - Li Li
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Jinzhong Lin
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Gang Wei
- State Key Laboratory of Genetic Engineering and Ministry of Education (MOE) Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center of Genetics and Development, Human Phenome Institute, School of Life Sciences and Huashan Hospital, Fudan University, Shanghai 200438, China
| | - Ting Ni
- State Key Laboratory of Genetic Engineering and Ministry of Education (MOE) Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center of Genetics and Development, Human Phenome Institute, School of Life Sciences and Huashan Hospital, Fudan University, Shanghai 200438, China
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30
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Kanakoglou DS, Michalettou TD, Vasileiou C, Gioukakis E, Maneta D, Kyriakidis KV, Georgakilas AG, Michalopoulos I. Effects of High-Dose Ionizing Radiation in Human Gene Expression: A Meta-Analysis. Int J Mol Sci 2020; 21:E1938. [PMID: 32178397 PMCID: PMC7139561 DOI: 10.3390/ijms21061938] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/06/2020] [Accepted: 03/09/2020] [Indexed: 12/16/2022] Open
Abstract
The use of high-dose Ionizing Radiation (IR) is currently one of the most common modalities in treatment of many types of cancer. The objective of this work was to investigate the effects of high-dose ionizing radiation on healthy human tissue, utilizing quantitative analysis of gene expression. To this end, publicly available transcriptomics datasets from human samples irradiated with a high dose of radiation and non-irradiated (control) ones were selected, and gene expression was determined using RNA-Seq data analysis. Raw data from these studies were subjected to quality control and trimming. Mapping of RNA-Seq reads was performed by the partial selective alignment method, and differential gene expression analysis was conducted. Subsequently, a meta-analysis was performed to select differentially expressed genes across datasets. Based on the differentially expressed genes discovered by meta-analysis, we constructed a protein-to-protein interaction network, and we identified biological pathways and processes related to high-dose IR effects. Our findings suggest that cell cycle arrest is activated, supported by our top down-regulated genes associated with cell cycle activation. DNA repair genes are down-regulated in their majority. However, several genes implicated in the nucleotide excision repair pathway are upregulated. Nevertheless, apoptotic mechanisms seem to be activated probably due to severe high-dose-induced complex DNA damage. The significant upregulation of CDKN1A, as a downstream gene of TP53, further validates programmed cell death. Finally, down-regulation of TIMELESS, signifies a correlation between IR response and circadian rhythm. Nonetheless, high-dose IR exposure effects regarding normal tissue (radiation toxicity) and its possible long-term outcomes should be studied to a greater extend.
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Affiliation(s)
- Dimitrios S. Kanakoglou
- Centre of Systems Biology, Biomedical Research Foundation, Academy of Athens, 115 27 Athens, Greece; (D.S.K.); (T.-D.M.); (C.V.); (E.G.); (D.M.); (K.V.K.)
- Section of Cell Biology and Biophysics, Department of Biology, School of Sciences, National and Kapodistrian University of Athens, 157 01 Athens, Greece
| | - Theodora-Dafni Michalettou
- Centre of Systems Biology, Biomedical Research Foundation, Academy of Athens, 115 27 Athens, Greece; (D.S.K.); (T.-D.M.); (C.V.); (E.G.); (D.M.); (K.V.K.)
- Section of Cell Biology and Biophysics, Department of Biology, School of Sciences, National and Kapodistrian University of Athens, 157 01 Athens, Greece
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, 157 80 Athens, Greece;
| | - Christina Vasileiou
- Centre of Systems Biology, Biomedical Research Foundation, Academy of Athens, 115 27 Athens, Greece; (D.S.K.); (T.-D.M.); (C.V.); (E.G.); (D.M.); (K.V.K.)
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, 157 80 Athens, Greece;
| | - Evangelos Gioukakis
- Centre of Systems Biology, Biomedical Research Foundation, Academy of Athens, 115 27 Athens, Greece; (D.S.K.); (T.-D.M.); (C.V.); (E.G.); (D.M.); (K.V.K.)
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, 157 80 Athens, Greece;
| | - Dorothea Maneta
- Centre of Systems Biology, Biomedical Research Foundation, Academy of Athens, 115 27 Athens, Greece; (D.S.K.); (T.-D.M.); (C.V.); (E.G.); (D.M.); (K.V.K.)
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, 157 80 Athens, Greece;
| | - Konstantinos V. Kyriakidis
- Centre of Systems Biology, Biomedical Research Foundation, Academy of Athens, 115 27 Athens, Greece; (D.S.K.); (T.-D.M.); (C.V.); (E.G.); (D.M.); (K.V.K.)
- Laboratory of Pharmacology, School of Pharmacy, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
| | - Alexandros G. Georgakilas
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, 157 80 Athens, Greece;
| | - Ioannis Michalopoulos
- Centre of Systems Biology, Biomedical Research Foundation, Academy of Athens, 115 27 Athens, Greece; (D.S.K.); (T.-D.M.); (C.V.); (E.G.); (D.M.); (K.V.K.)
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Zhao Z, Wang Y, Yun D, Huang Q, Meng D, Li Q, Zhang P, Wang C, Chen H, Lu D. TRIM21 overexpression promotes tumor progression by regulating cell proliferation, cell migration and cell senescence in human glioma. Am J Cancer Res 2020; 10:114-130. [PMID: 32064156 PMCID: PMC7017742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023] Open
Abstract
Molecular biomarkers combined with histopathological examination are of critical importance in the diagnosis and treatment of gliomas. Although recent studies have shown that many tripartite motif-containing (TRIM) family proteins could regulate the cell cycle, cell proliferation, and differentiation in cancers, the precise role of TRIM21 has been unknown in glioma. In this study, we analyzed TRIM21, which was upregulated in gliomas and identified its role in tumor proliferation, migration and drug resistance. By using immunohistochemical analysis, we found that the expression level of TRIM21 was upregulated in glioma specimens and the higher expression level of TRIM21 was associated with poorer clinical outcomes in glioma patients. Moreover, we demonstrated that TRIM21 could act as a regulator of the proliferation, cell cycle, and migration of glioma cells by gain- and loss-of function assays in vitro. In vivo, TRIM21 could also modulate glioma progression in murine intracranial xenografts. Furthermore, we found that TRIM21 suppressed cellular senescence via the p53-p21 pathway, and increased drug resistance in glioma cells by RNA-seq analysis, SA-β-Gal activity assay, and Cell Counting Kit-8 (CCK-8) assay. These results indicated that TRIM21 is a novel regulator in the diagnosis, prognosis, and therapy of gliomas.
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Affiliation(s)
- Zhipeng Zhao
- State Key Laboratory of Genetic Engineering and MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan UniversityShanghai 200438, China
- School of Physical Education, Xizang Minzu UniversityXianyang 712000, Shaanxi, China
| | - Yuqi Wang
- State Key Laboratory of Genetic Engineering and MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan UniversityShanghai 200438, China
| | - Dapeng Yun
- Department of Pharmacology, The University of Texas Southwestern Medical CenterDallas TX75390, USA
| | - Qilin Huang
- Department of Neurosurgery, Shanghai Institute of Neurosurgery, Changzheng Hospital, Second Military Medical UniversityShanghai 200003, China
| | - Delong Meng
- Department of Molecular Biology, The University of Texas Southwestern Medical CenterDallas TX75390, USA
| | - Qing Li
- Shanghai Center for Clinical Laboratory528 Hongshan Road, Pudong District, Shanghai 200126, China
| | - Pingzhao Zhang
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical CollegeShanghai 200032, China
| | - Chenji Wang
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan UniversityShanghai 200438, China
| | - Hongyan Chen
- State Key Laboratory of Genetic Engineering and MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan UniversityShanghai 200438, China
| | - Daru Lu
- State Key Laboratory of Genetic Engineering and MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan UniversityShanghai 200438, China
- Key Laboratory of Birth Defects and Reproductive Health of National Health and Family Planning Commission, Chongqing Population and Family Planning, Science and Technology Research InstituteChongqing 400020, China
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Schwab N, Grenier K, Hazrati LN. DNA repair deficiency and senescence in concussed professional athletes involved in contact sports. Acta Neuropathol Commun 2019; 7:182. [PMID: 31727161 PMCID: PMC6857343 DOI: 10.1186/s40478-019-0822-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 09/29/2019] [Indexed: 12/11/2022] Open
Abstract
Mild traumatic brain injury (mTBI) leads to diverse symptoms including mood disorders, cognitive decline, and behavioral changes. In some individuals, these symptoms become chronic and persist in the long-term and can confer an increased risk of neurodegenerative disease and dementia diagnosis later in life. Despite the severity of its consequences, the pathophysiological mechanism of mTBI remains unknown. In this post-mortem case series, we assessed DNA damage-induced cellular senescence pathways in 38 professional athletes with a history of repeated mTBI and ten controls with no mTBI history. We assessed clinical presentation, neuropathological changes, load of DNA damage, morphological markers of cellular senescence, and expression of genes involved in DNA damage signaling, DNA repair, and cellular senescence including the senescence-associated secretory phenotype (SASP). Twenty-eight brains with past history of repeated mTBI history had DNA damage within ependymal cells, astrocytes, and oligodendrocytes. DNA damage burden was increased in brains with proteinopathy compared to those without. Cases also showed hallmark features of cellular senescence in glial cells including astrocytic swelling, beading of glial cell processes, loss of H3K27Me3 (trimethylation at lysine 27 of histone H3) and lamin B1 expression, and increased expression of cellular senescence and SASP pathways. Neurons showed a spectrum of changes including loss of emerin nuclear membrane expression, loss of Brahma-related gene-1 (BRG1 or SMARCA4) expression, loss of myelin basic protein (MBP) axonal expression, and translocation of intranuclear tau to the cytoplasm. Expression of DNA repair proteins was decreased in mTBI brains. mTBI brains showed substantial evidence of DNA damage and cellular senescence. Decreased expression of DNA repair genes suggests inefficient DNA repair pathways in this cohort, conferring susceptibly to cellular senescence and subsequent brain dysfunction after mTBI. We therefore suggest that brains of contact-sports athletes are characterized by deficient DNA repair and DNA damage-induced cellular senescence and propose that this may affect neurons and be the driver of brain dysfunction in mTBI, predisposing the progression to neurodegenerative diseases. This study provides novel targets for diagnostic and prognostic biomarkers, and represents viable targets for future treatments.
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Affiliation(s)
- Nicole Schwab
- Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Cir, Toronto, ON, M5S 1A8, Canada
- The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 1X8, Canada
- Canadian Concussion Centre, Toronto Western Hospital, Toronto, ON, Canada
| | - Karl Grenier
- Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Cir, Toronto, ON, M5S 1A8, Canada
- The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 1X8, Canada
| | - Lili-Naz Hazrati
- Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Cir, Toronto, ON, M5S 1A8, Canada.
- The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 1X8, Canada.
- Canadian Concussion Centre, Toronto Western Hospital, Toronto, ON, Canada.
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33
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Chesnokova V, Melmed S. Growth hormone in the tumor microenvironment. ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2019; 63:568-575. [PMID: 31939481 PMCID: PMC7025769 DOI: 10.20945/2359-3997000000186] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 09/27/2019] [Indexed: 12/20/2022]
Abstract
Tumor development is a multistep process whereby local mechanisms enable somatic mutations during preneoplastic stages. Once a tumor develops, it becomes a complex organ composed of multiple cell types. Interactions between malignant and non-transformed cells and tissues create a tumor microenvironment (TME) comprising epithelial cancer cells, cancer stem cells, non-tumorous cells, stromal cells, immune-inflammatory cells, blood and lymphatic vascular network, and extracellular matrix. We review reports and present a hypothesis that postulates the involvement of growth hormone (GH) in field cancerization. We discuss GH contribution to TME, promoting epithelial-to-mesenchymal transition, accumulation of unrepaired DNA damage, tumor vascularity, and resistance to therapy. Arch Endocrinol Metab. 2019;63(6):568-75.
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Affiliation(s)
- Vera Chesnokova
- Pituitary CenterDepartment of MedicineCedars-Sinai Medical CenterLos AngelesCAUSAPituitary Center, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Shlomo Melmed
- Pituitary CenterDepartment of MedicineCedars-Sinai Medical CenterLos AngelesCAUSAPituitary Center, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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34
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Schmid N, Flenkenthaler F, Stöckl JB, Dietrich KG, Köhn FM, Schwarzer JU, Kunz L, Luckner M, Wanner G, Arnold GJ, Fröhlich T, Mayerhofer A. Insights into replicative senescence of human testicular peritubular cells. Sci Rep 2019; 9:15052. [PMID: 31636313 PMCID: PMC6803627 DOI: 10.1038/s41598-019-51380-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 09/27/2019] [Indexed: 01/10/2023] Open
Abstract
There is evidence for an age-related decline in male reproductive functions, yet how the human testis may age is not understood. Human testicular peritubular cells (HTPCs) transport sperm, contribute to the spermatogonial stem cell (SSC) niche and immune surveillance, and can be isolated and studied in vitro. Consequences of replicative senescence of HTPCs were evaluated to gain partial insights into human testicular aging. To this end, early and advanced HTPC passages, in which replicative senescence was indicated by increased cell size, altered nuclear morphology, enhanced β-galactosidase activity, telomere attrition and reduced mitochondrial DNA (mtDNA), were compared. These alterations are typical for senescent cells, in general. To examine HTPC-specific changes, focused ion beam scanning electron microscopy (FIB/SEM) tomography was employed, which revealed a reduced mitochondrial network and an increased lysosome population. The results coincide with the data of a parallel proteomic analysis and indicate deranged proteostasis. The mRNA levels of typical contractility markers and growth factors, important for the SSC niche, were not significantly altered. A secretome analysis identified, however, elevated levels of macrophage migration inhibitory factor (MIF) and dipeptidyl peptidase 4 (DPP4), which may play a role in spermatogenesis. Testicular DPP4 may further represent a possible drug target.
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Affiliation(s)
- Nina Schmid
- LMU München, Biomedical Center (BMC), Anatomy III - Cell Biology, 82152, Planegg-Martinsried, Germany
| | - Florian Flenkenthaler
- LMU München, Gene Center, Laboratory for Functional Genome Analysis (LAFUGA), 81377 München, Germany
| | - Jan B Stöckl
- LMU München, Gene Center, Laboratory for Functional Genome Analysis (LAFUGA), 81377 München, Germany
| | - Kim-Gwendolyn Dietrich
- LMU München, Biomedical Center (BMC), Anatomy III - Cell Biology, 82152, Planegg-Martinsried, Germany
| | | | | | - Lars Kunz
- LMU München, Department Biology II, Division of Neurobiology, 82152, Planegg-Martinsried, Germany
| | - Manja Luckner
- LMU München, Department Biology I, Ultrastructural Research, 82152, Planegg-Martinsried, Germany
| | - Gerhard Wanner
- LMU München, Department Biology I, Ultrastructural Research, 82152, Planegg-Martinsried, Germany
| | - Georg J Arnold
- LMU München, Gene Center, Laboratory for Functional Genome Analysis (LAFUGA), 81377 München, Germany
| | - Thomas Fröhlich
- LMU München, Gene Center, Laboratory for Functional Genome Analysis (LAFUGA), 81377 München, Germany
| | - Artur Mayerhofer
- LMU München, Biomedical Center (BMC), Anatomy III - Cell Biology, 82152, Planegg-Martinsried, Germany.
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Galvis D, Walsh D, Harries LW, Latorre E, Rankin J. A dynamical systems model for the measurement of cellular senescence. J R Soc Interface 2019; 16:20190311. [PMID: 31594522 PMCID: PMC6833332 DOI: 10.1098/rsif.2019.0311] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Senescent cells provide a good in vitro model to study ageing. However, cultures of ‘senescent’ cells consist of a mix of cell subtypes (proliferative, senescent, growth-arrested and apoptotic). Determining the proportion of senescent cells is crucial for studying ageing and developing new anti-degenerative therapies. Commonly used markers such as doubling population, senescence-associated β-galactosidase, Ki-67, γH2AX and TUNEL assays capture diverse and overlapping cellular populations and are not purely specific to senescence. A newly developed dynamical systems model follows the transition of an initial culture to senescence tracking population doubling, and the proportion of cells in proliferating, growth-arrested, apoptotic and senescent states. Our model provides a parsimonious description of transitions between these states accruing towards a predominantly senescent population. Using a genetic algorithm, these model parameters are well constrained by an in vitro human primary fibroblast dataset recording five markers at 16 time points. The computational model accurately fits to the data and translates these joint markers into the first complete description of the proportion of cells in different states over the lifetime. The high temporal resolution of the dataset demonstrates the efficacy of strategies for reconstructing the trajectory towards replicative senescence with a minimal number of experimental recordings.
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Affiliation(s)
- Daniel Galvis
- Living Systems Institute, University of Exeter, Exeter, UK.,Translational Research Exchange at Exeter, University of Exeter, Exeter, UK
| | - Darren Walsh
- Institute of Biomedical and Clinical Science, University of Exeter, Medical School, RILD Building, Barrack Road, Exeter EX2 5DW, UK
| | - Lorna W Harries
- Institute of Biomedical and Clinical Science, University of Exeter, Medical School, RILD Building, Barrack Road, Exeter EX2 5DW, UK
| | - Eva Latorre
- Institute of Biomedical and Clinical Science, University of Exeter, Medical School, RILD Building, Barrack Road, Exeter EX2 5DW, UK.,Department of Biochemistry and Molecular and Cell Biology, University of Zaragoza, Zaragoza, Spain
| | - James Rankin
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Harrison Building, North Park Road, Exeter EX4 4QF, UK.,EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter EX4 4QJ, UK
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Abstract
Squamous cell carcinomas (SCCs) arising from aerodigestive or anogenital epithelium that are associated with the human papillomavirus (HPV) are far more readily cured with radiation therapy than HPV-negative SCCs. The mechanism behind this increased radiosensitivity has been proposed to be secondary to defects in DNA repair, although the specific repair pathways that are disrupted have not been elucidated. To gain insight into this important biomarker of radiosensitivity, we first examined genomic patterns reflective of defects in DNA double-strand break repair, comparing HPV-associated and HPV-negative head and neck cancers (HNSCC). Compared to HPV-negative HNSCC genomes, HPV+ cases demonstrated a marked increase in the proportion of deletions with flanking microhomology, a signature associated with a backup, error-prone double-strand break repair pathway known as microhomology-mediated end-joining (MMEJ). Then, using 3 different methodologies to comprehensively profile double-strand break repair pathways in isogenic paired cell lines, we demonstrate that the HPV16 E7 oncoprotein suppresses canonical nonhomologous end-joining (NHEJ) and promotes error-prone MMEJ, providing a mechanistic rationale for the clinical radiosensitivity of these cancers.
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Wéra AC, Lobbens A, Stoyanov M, Lucas S, Michiels C. Radiation-induced synthetic lethality: combination of poly(ADP-ribose) polymerase and RAD51 inhibitors to sensitize cells to proton irradiation. Cell Cycle 2019; 18:1770-1783. [PMID: 31238782 DOI: 10.1080/15384101.2019.1632640] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Although improvements in radiation therapy were made over the years, radioresistance is still a major challenge. Cancer cells are often deficient for DNA repair response, a feature that is currently exploited as a new anti-cancer strategy. In this context, combination of inhibitors targeting complementary pathways is of interest to sensitize cells to radiation. In this work, we used PARP (Olaparib) and RAD51 (B02) inhibitors to radiosensitize cancer cells to proton and X-ray radiation. More particularly, Olaparib and B02 were used at concentration leading to limited cytotoxic (alone or in combination) but increasing cell death when the cells were irradiated. We showed that, although at limited concentration, Olaparib and B02 were able to radiosensitize different cancer cell lines, i.e. lung and pancreatic cancer cells. Antagonistic, additive or synergistic effects were observed and correlated to cell proliferation rate. The inhibitors enhanced persistent DNA damage, delayed apoptosis, prolonged cell cycle arrest and senescence upon irradiation. These results demonstrated that radiation-induced synthetic lethality might widen the therapeutic window, hence extending the use of PARP inhibitors to patients without BRCAness.
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38
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Vancurova M, Hanzlikova H, Knoblochova L, Kosla J, Majera D, Mistrik M, Burdova K, Hodny Z, Bartek J. PML nuclear bodies are recruited to persistent DNA damage lesions in an RNF168-53BP1 dependent manner and contribute to DNA repair. DNA Repair (Amst) 2019; 78:114-127. [PMID: 31009828 DOI: 10.1016/j.dnarep.2019.04.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/07/2019] [Accepted: 04/01/2019] [Indexed: 11/29/2022]
Abstract
The bulk of DNA damage caused by ionizing radiation (IR) is generally repaired within hours, yet a subset of DNA lesions may persist even for long periods of time. Such persisting IR-induced foci (pIRIF) co-associate with PML nuclear bodies (PML-NBs) and are among the characteristics of cellular senescence. Here we addressed some fundamental questions concerning the nature and determinants of this co-association, the role of PML-NBs at such sites, and the reason for the persistence of DNA damage in human primary cells. We show that the persistent DNA lesions are devoid of homologous recombination (HR) proteins BRCA1 and Rad51. Our super-resolution microscopy-based analysis showed that PML-NBs are juxtaposed to and partially overlap with the pIRIFs. Notably, depletion of 53BP1 resulted in decreased intersection between PML-NBs and pIRIFs implicating the RNF168-53BP1 pathway in their interaction. To test whether the formation and persistence of IRIFs is PML-dependent and to investigate the role of PML in the context of DNA repair and senescence, we genetically deleted PML in human hTERT-RPE-1 cells. Unexpectedly, upon high-dose IR treatment, cells displayed similar DNA damage signalling, repair dynamics and kinetics of cellular senescence regardless of the presence or absence of PML. In contrast, the PML knock-out cells showed increased sensitivity to low doses of IR and DNA-damaging agents mitomycin C, cisplatin and camptothecin that all cause DNA lesions requiring repair by HR. These results, along with enhanced sensitivity of the PML knock-out cells to DNA-PK and PARP inhibitors implicate PML as a factor contributing to HR-mediated DNA repair.
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Affiliation(s)
- Marketa Vancurova
- Department of Genome Integrity, Institute of Molecular Genetics, v.v.i., Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Hana Hanzlikova
- Department of Genome Integrity, Institute of Molecular Genetics, v.v.i., Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Lucie Knoblochova
- Department of Genome Integrity, Institute of Molecular Genetics, v.v.i., Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Jan Kosla
- Department of Genome Integrity, Institute of Molecular Genetics, v.v.i., Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Dusana Majera
- Laboratory of Genome Integrity, Institute of Molecular and Translational Medicine, Palacky University, Olomouc, Czech Republic
| | - Martin Mistrik
- Laboratory of Genome Integrity, Institute of Molecular and Translational Medicine, Palacky University, Olomouc, Czech Republic
| | - Kamila Burdova
- Laboratory of Cancer Cell Biology, Institute of Molecular Genetics, v.v.i., Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Zdenek Hodny
- Department of Genome Integrity, Institute of Molecular Genetics, v.v.i., Academy of Sciences of the Czech Republic, Prague, Czech Republic.
| | - Jiri Bartek
- Department of Genome Integrity, Institute of Molecular Genetics, v.v.i., Academy of Sciences of the Czech Republic, Prague, Czech Republic; Laboratory of Genome Integrity, Institute of Molecular and Translational Medicine, Palacky University, Olomouc, Czech Republic; Genome Integrity Unit, Danish Cancer Society Research Center, Copenhagen, Denmark; Science for Life Laboratory, Division of Genome Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, S-171 21, Stockholm, Sweden.
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39
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The Guardian of the Genome Revisited: p53 Downregulates Genes Required for Telomere Maintenance, DNA Repair, and Centromere Structure. Cancers (Basel) 2018; 10:cancers10050135. [PMID: 29734785 PMCID: PMC5977108 DOI: 10.3390/cancers10050135] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 04/30/2018] [Accepted: 05/02/2018] [Indexed: 02/06/2023] Open
Abstract
The p53 protein has been extensively studied for its capacity to prevent proliferation of cells with a damaged genome. Surprisingly, however, our recent analysis of mice expressing a hyperactive mutant p53 that lacks the C-terminal domain revealed that increased p53 activity may alter genome maintenance. We showed that p53 downregulates genes essential for telomere metabolism, DNA repair, and centromere structure and that a sustained p53 activity leads to phenotypic traits associated with dyskeratosis congenita and Fanconi anemia. This downregulation is largely conserved in human cells, which suggests that our findings could be relevant to better understand processes involved in bone marrow failure as well as aging and tumor suppression.
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40
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Yu J, Shi J, Zhang Y, Zhang Y, Huang Y, Chen Z, Yang J. The replicative senescent mesenchymal stem / stromal cells defect in DNA damage response and anti-oxidative capacity. Int J Med Sci 2018; 15:771-781. [PMID: 30008586 PMCID: PMC6036081 DOI: 10.7150/ijms.24635] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 04/27/2018] [Indexed: 01/11/2023] Open
Abstract
Replicative senescence and potential malignant transformation are great limitations in the clinical application of bone marrow-derived mesenchymal stem / stromal cells (MSCs). An abnormal DNA damage response may result in genomic instability, which is an integral component of aging and tumorigenesis. However, the effect of aging on the DNA damage response in MSCs is currently unknown. In the present study, we evaluated the DNA damage response induced by oxidative stress and DNA double-strand breaks in human bone marrow-derived MSCs. After long-term cell culture, replicative senescent MSCs (sMSCs) were characterized by a poor proliferation rate, high senescence-associated β-galactosidase activity, and enhanced expression of P53 and P16. Features of the DNA damage response in these sMSCs were then compared with those from early-passage MSCs. The sMSCs were more sensitive to hydrogen peroxide and bleomycin treatment with respect to cell viability and apoptosis induction. Combined with the comet assay, γH2AX foci characterization and reactive oxygen species detection were used to demonstrate that the antioxidant and DNA repair ability of sMSCs are attenuated. This result could be explained, at least in part, by the downregulation of anti-oxidation and DNA repair genes, including Cu/Zn-SOD, GPX, CAT, OGG1, XRCC1, Ku70, BRCA2 and XRCC4. In conclusion, MSCs aging is associated with a reduction in the DNA repair and anti-oxidative capacity.
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Affiliation(s)
- Jin Yu
- Department of Cell Biology, Army Medical University (The Third Military Medical University), Chongqing 400038, China
| | - Jiazhong Shi
- Department of Cell Biology, Army Medical University (The Third Military Medical University), Chongqing 400038, China
| | - Yue Zhang
- Department of Cell Biology, Army Medical University (The Third Military Medical University), Chongqing 400038, China.,Department of Pathology, The 451th hospital of PLA, Xi'an 710000, China
| | - Yi Zhang
- Department of Cell Biology, Army Medical University (The Third Military Medical University), Chongqing 400038, China
| | - Yaqin Huang
- Department of Cell Biology, Army Medical University (The Third Military Medical University), Chongqing 400038, China
| | - Zhiwen Chen
- Urology Institute of PLA, Southwest Hospital, Army Medical University (The Third Military Medical University), Chongqing 400038, China
| | - Jin Yang
- Department of Cell Biology, Army Medical University (The Third Military Medical University), Chongqing 400038, China
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