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Humayun A, Lin LYT, Li HH, Fornace AJ. FAILLA MEMORIAL LECTURE How We Got Here: One Laboratory's Odyssey in the Field of Radiation-Inducible Genes. Radiat Res 2024; 201:617-627. [PMID: 38573158 DOI: 10.1667/rade-23-00205.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 03/11/2024] [Indexed: 04/05/2024]
Abstract
This review focuses on early discoveries that contributed to our understanding and the scope of transcriptional responses after radiation damage. Before the development of modern approaches to assess overall global transcriptomic responses, the idea that mammalian cells could respond to DNA-damaging agents in a manner analogous to bacteria was not generally accepted. To investigate this possibility, the development of technology to identify differentially expressed low-abundance transcripts substantially facilitated our appreciation that DNA damaging agents like UV radiation and subsequently ionizing radiation did in fact produce robust transcriptional responses. Here we focus on our identification and characterization of radiation-inducible genes, and how even early studies on stress gene signaling highlighted the broad scope of transcriptional responses to radiation damage. Since then, the central role of transcriptional responses to radiation injury in maintaining genome integrity has been highlighted in many processes, including cell cycle checkpoint control, resistance to cancer by p53 and other key factors, cell senescence, and metabolism.
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Affiliation(s)
- Arslon Humayun
- Department of Oncology, Lombardi Comprehensive Cancer Center, Washington, DC
| | | | - Heng-Hong Li
- Department of Oncology, Lombardi Comprehensive Cancer Center, Washington, DC
| | - Albert J Fornace
- Department of Oncology, Lombardi Comprehensive Cancer Center, Washington, DC
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, DC
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2
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Cao L, Zhou J, Ma W, Zhang H, Pan H, Xu M, Wang Y, Wang P, Xiang X, Liu Y, Qiu X, Zhou X, Wang X. Identification of lncRNA-based regulatory mechanisms of Takifugu rubripes growth traits in fast and slow-growing family lines. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2024; 49:101164. [PMID: 37976965 DOI: 10.1016/j.cbd.2023.101164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/09/2023] [Accepted: 11/09/2023] [Indexed: 11/19/2023]
Abstract
Family selection is an important method in fish aquaculture because growth is the most important economic trait. Fast-and slow-growing families of tiger puffer fish (Takifugu rubripes) have been established through family selection. The development of teleost fish is primarily controlled by the growth hormone (GH)-insulin-like growth factor 1 (IGF-1) axis that includes the hypothalamus-pituitary-liver. In this study, the molecular mechanisms underlying T. rubripes growth were analyzed by comparing transcriptomes from fast- and slow-growing families. The expressions of 214 lncRNAs were upregulated, and those of 226 were downregulated in the brain tissues of the fast-growing T. rubripes family compared to those of the slow-growing family. Differentially expressed lncRNAs centrally regulate mitogen-activated protein kinase (MAPK) and forkhead box O (FoxO) signaling pathways. Based on the results of lncRNA-gene network construction, we found that lncRNA3133.13, lncRNA23169.1, lncRNA23145.1, and lncRNA23141.3 regulated all four genes (igf1, mdm2, flt3, and cwf19l1). In addition, lncRNA7184.10 may be a negative regulator of rasgrp2 and a positive regulator of gadd45ga, foxo3b, and dusp5. These target genes are associated with the growth and development of organisms through the PI3K/AKT and MAPK/ERK pathways. Overall, transcriptomic analyses of fast- and slow-growing families of T. rubripes provided insights into the molecular mechanisms of teleost fish growth rates. Further, these analyses provide evidence for key genes related to growth regulation and the lncRNA expression regulatory network that will provide a framework for improving puffer fish germplasm resources.
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Affiliation(s)
- Lirong Cao
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China
| | - Jinxu Zhou
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Wenchao Ma
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Huakun Zhang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China
| | - Hanbai Pan
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China
| | - Mingjie Xu
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China
| | - Yusen Wang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China
| | - Peiyang Wang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China
| | - Xuejian Xiang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China
| | - Yang Liu
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China
| | - Xuemei Qiu
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China
| | - Xiaoxu Zhou
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China.
| | - Xiuli Wang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; Key Laboratory of Pufferfish Breeding and Culture in Liaoning Province, Dalian Ocean University, Dalian 116023, China.
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3
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Adamus-Grabicka AA, Hikisz P, Sikora J. Nanotechnology as a Promising Method in the Treatment of Skin Cancer. Int J Mol Sci 2024; 25:2165. [PMID: 38396841 PMCID: PMC10889690 DOI: 10.3390/ijms25042165] [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: 01/20/2024] [Revised: 02/06/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
The incidence of skin cancer continues to grow. There are an estimated 1.5 million new cases each year, of which nearly 350,000 are melanoma, which is often fatal. Treatment is challenging and often ineffective, with conventional chemotherapy playing a limited role in this context. These disadvantages can be overcome by the use of nanoparticles and may allow for the early detection and monitoring of neoplastic changes and determining the effectiveness of treatment. This article briefly reviews the present understanding of the characteristics of skin cancers, their epidemiology, and risk factors. It also outlines the possibilities of using nanotechnology, especially nanoparticles, for the transport of medicinal substances. Research over the previous decade on carriers of active substances indicates that drugs can be delivered more accurately to the tumor site, resulting in higher therapeutic efficacy. The article describes the application of liposomes, carbon nanotubes, metal nanoparticles, and polymer nanoparticles in existing therapies. It discusses the challenges encountered in nanoparticle therapy and the possibilities of improving their performance. Undoubtedly, the use of nanoparticles is a promising method that can help in the fight against skin cancer.
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Affiliation(s)
- Angelika A. Adamus-Grabicka
- Department of Bioinorganic Chemistry, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland;
| | - Pawel Hikisz
- Department of Oncobiology and Epigenetics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland;
| | - Joanna Sikora
- Department of Bioinorganic Chemistry, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland;
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4
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Jiang Y, Xiang Y, Lin C, Zhang W, Yang Z, Xiang L, Xiao Y, Chen L, Ran Q, Li Z. Multifunctions of CRIF1 in cancers and mitochondrial dysfunction. Front Oncol 2022; 12:1009948. [PMID: 36263222 PMCID: PMC9574215 DOI: 10.3389/fonc.2022.1009948] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 09/14/2022] [Indexed: 11/23/2022] Open
Abstract
Sustaining proliferative signaling and enabling replicative immortality are two important hallmarks of cancer. The complex of cyclin-dependent kinase (CDK) and its cyclin plays a decisive role in the transformation of the cell cycle and is also critical in the initiation and progression of cancer. CRIF1, a multifunctional factor, plays a pivotal role in a series of cell biological progresses such as cell cycle, cell proliferation, and energy metabolism. CRIF1 is best known as a negative regulator of the cell cycle, on account of directly binding to Gadd45 family proteins or CDK2. In addition, CRIF1 acts as a regulator of several transcription factors such as Nur77 and STAT3 and partly determines the proliferation of cancer cells. Many studies showed that the expression of CRIF1 is significantly altered in cancers and potentially regarded as a tumor suppressor. This suggests that targeting CRIF1 would enhance the selectivity and sensitivity of cancer treatment. Moreover, CRIF1 might be an indispensable part of mitoribosome and is involved in the regulation of OXPHOS capacity. Further, CRIF1 is thought to be a novel target for the underlying mechanism of diseases with mitochondrial dysfunctions. In summary, this review would conclude the latest aspects of studies about CRIF1 in cancers and mitochondria-related diseases, shed new light on targeted therapy, and provide a more comprehensive holistic view.
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Affiliation(s)
- Yangzhou Jiang
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
| | - Yang Xiang
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
| | - Chuanchuan Lin
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
| | - Weiwei Zhang
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
| | - Zhenxing Yang
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
| | - Lixin Xiang
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
| | - Yanni Xiao
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
| | - Li Chen
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
| | - Qian Ran
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
| | - Zhongjun Li
- Laboratory of Radiation Biology, Laboratory Medicine Center, Department of Blood Transfusion, The Second Affiliated Hospital, Army Military Medical University, Chongqing, China
- State Key Laboratory of Trauma, Burn and Combined Injuries, The Second Affiliated Hospital, Army Medical University, Chongqing, China
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5
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Sultan FA, Sawaya BE. Gadd45 in Neuronal Development, Function, and Injury. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1360:117-148. [PMID: 35505167 DOI: 10.1007/978-3-030-94804-7_9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The growth arrest and DNA damage-inducible (Gadd) 45 proteins have been associated with numerous cellular mechanisms including cell cycle control, DNA damage sensation and repair, genotoxic stress, neoplasia, and molecular epigenetics. The genes were originally identified in in vitro screens of irradiation- and interleukin-induced transcription and have since been implicated in a host of normal and aberrant central nervous system processes. These include early and postnatal development, injury, cancer, memory, aging, and neurodegenerative and psychiatric disease states. The proteins act through a variety of molecular signaling cascades including the MAPK cascade, cell cycle control mechanisms, histone regulation, and epigenetic DNA demethylation. In this review, we provide a comprehensive discussion of the literature implicating each of the three members of the Gadd45 family in these processes.
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Affiliation(s)
- Faraz A Sultan
- Department of Psychiatry, Rush University, Chicago, IL, USA.
| | - Bassel E Sawaya
- Molecular Studies of Neurodegenerative Diseases Lab, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA.,FELS Cancer Institute for Personalized Medicine Institute, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA.,Departments of Neurology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA.,Cancer and Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA.,Neural Sciences, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
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6
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Identification of a novel catalytic inhibitor of topoisomerase II alpha that engages distinct mechanisms in p53 wt or p53 -/- cells to trigger G2/M arrest and senescence. Cancer Lett 2022; 526:284-303. [PMID: 34843865 DOI: 10.1016/j.canlet.2021.11.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/10/2021] [Accepted: 11/19/2021] [Indexed: 12/18/2022]
Abstract
We report a novel topoisomerase IIα inhibitor, mercaptopyridine oxide (MPO), which induces G2/M arrest and senescence with distinctly different cell cycle regulators (p21 or p14ARF) in HCT116p 53WT and HCT116 p53-/- cells, respectively. MPO treatment induced defective topoisomerase IIα-mediated decatenation process and inhibition of the enzyme's catalytic activity that stalled entry into mitosis. Topoisomerase IIα inhibition was associated with ROS-mediated activation of ATM-Chk2 kinase axis in HCT116 p53WT cells, but not in HCT116 p53-/- cells displaying early Chk1 activation. Results suggest that E2F1 stabilization might link MPO-induced p53 phospho-activation in HCT116 p53WT cells or p14ARF induction in HCT116 p53-/- cells. Also, interaction between topoisomerase IIα and Chk1 was induced in both cell lines, which could be important for decatenation checkpoint activation, even upon p53 ablation. Notably, TCGA dataset analyses revealed topoisomerase IIα upregulation across a wide array of cancers, which was associated with lower overall survival. Corroborating that increased topoisomerase IIα expression might offer susceptibility to the novel inhibitor, MPO (5 μM) induced strong inhibition in colony forming ability of pancreatic and hepatocellular cancer cell lines. These data highlight a novel topoisomerase IIα inhibitor and provide proof-of-concept for its therapeutic potential against cancers even with loss-of-function of p53.
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Elersek T, Novak M, Mlinar M, Virant I, Bahor N, Leben K, Žegura B, Filipič M. Lethal and Sub-Lethal Effects and Modulation of Gene Expression Induced by T Kinase Inhibitors in Zebrafish (Danio Rerio) Embryos. TOXICS 2021; 10:toxics10010004. [PMID: 35051046 PMCID: PMC8781212 DOI: 10.3390/toxics10010004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/16/2021] [Accepted: 12/21/2021] [Indexed: 12/11/2022]
Abstract
Tyrosine kinase inhibitors (TKIs) are designed for targeted cancer therapy. The consumption of these drugs during the last 20 years has been constantly rising. In the zebrafish (Danio rerio) embryo toxicity test, we assessed the toxicity of six TKIs: imatinib mesylate, erlotinib, nilotinib, dasatinib, sorafenib and regorafenib. Imatinib mesylate and dasatinib induced lethal effects, while regorafenib, sorfenib and dasatinib caused a significant increase of sub-lethal effects, predominantly oedema, no blood circulation and formation of blood aggregates. The analyses of the changes in the expression of selected genes associated with the hormone system after the exposure to imatinib mesylate, dasatinib and regorafenib demonstrated that all three tested TKIs deregulated the expression of oestrogen receptor esr1, cytochrome P450 aromatase (cypa19b) and hydroxysteroid-dehydrogenase (hsd3b), regorafenib, and also thyroglobulin (tg). The expression of genes involved in the DNA damage response (gadd45 and mcm6) and apoptosis (bcl2) was deregulated only by exposure to regorafenib. The data indicate that common mechanisms, namely antiangiogenic activity and interference with steroidogenesis are involved in the TKI induced sub-lethal effects and potential hormone disrupting activity, respectively. The residues of TKIs may represent an environmental hazard; therefore, further ecotoxicological studies focusing also on the effects of their mixtures are warranted.
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Affiliation(s)
- Tina Elersek
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000 Ljubljana, Slovenia; (T.E.); (M.N.); (M.M.); (N.B.); (K.L.); (B.Ž.)
| | - Matjaž Novak
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000 Ljubljana, Slovenia; (T.E.); (M.N.); (M.M.); (N.B.); (K.L.); (B.Ž.)
| | - Mateja Mlinar
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000 Ljubljana, Slovenia; (T.E.); (M.N.); (M.M.); (N.B.); (K.L.); (B.Ž.)
| | - Igor Virant
- Institute of Oncology Ljubljana, Zaloška 2, 1000 Ljubljana, Slovenia;
| | - Nika Bahor
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000 Ljubljana, Slovenia; (T.E.); (M.N.); (M.M.); (N.B.); (K.L.); (B.Ž.)
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Karin Leben
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000 Ljubljana, Slovenia; (T.E.); (M.N.); (M.M.); (N.B.); (K.L.); (B.Ž.)
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Bojana Žegura
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000 Ljubljana, Slovenia; (T.E.); (M.N.); (M.M.); (N.B.); (K.L.); (B.Ž.)
| | - Metka Filipič
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000 Ljubljana, Slovenia; (T.E.); (M.N.); (M.M.); (N.B.); (K.L.); (B.Ž.)
- Correspondence:
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Wang F, Kong L, Pu Y, Chao F, Zang C, Qin W, Zhao F, Cai S. Long Noncoding RNA DICER1-AS1 Functions in Methylation Regulation on the Multi-Drugresistance of Osteosarcoma Cells via miR-34a-5p and GADD45A. Front Oncol 2021; 11:685881. [PMID: 34307152 PMCID: PMC8299526 DOI: 10.3389/fonc.2021.685881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 06/07/2021] [Indexed: 12/18/2022] Open
Abstract
Osteosarcoma (OS) is a common malignant bone tumor that commonly occurs in children and adolescents. Long noncoding RNAs (lncRNAs) are recognized as a novel class of regulators of gene expression associated with tumorigenesis. However, the effect and mechanism of lncRNAs in OS tumorigenesis and drug resistance have not been characterized. The purpose of the study is to screen potential biomarker and therapeutic target against OS. We compared the lncRNA expression profiles between OS cell lines with different drug resistance levels using RNA-seq analysis and found that lncRNA DICER1-AS1 was significantly differentially expressed in multi-drugresistant OS cells SJSA-1 versus multi-drugsensitive OS cells G-292. Bisulfite Sequencing PCR (BSP) assay was performed to analyze the differential methylation status of the promoter region of DICER1-AS1 in four OS cells. Subsequently, in vitro gain- and loss-of-function experiments demonstrated the roles of DICER1-AS1 and miR-34a-5p in the multi-drugresistance of OS cells. The main findings is that DICER1-AS1 directly binds to miR-34a-5p, and their expression has a negative correlation with each other. The hypermethylation of the promoter region of DICER1-AS1 silenced its expression in the drugresistant cells SJSA-1 and MNNG/HOS. Moreover, we found that growth arrest and DNA damage-inducible alpha (GADD45A) participates in the DICER1-AS1/miR-34a-5p-regulated drug resistance of OS cells, probably via the cell cycle/pRb-E2F pathway. Our results revealed DICER1-AS1/miR-34a-5p-regulated drug resistance of OS cells, a new lncRNA-regulated network in OS tumorigenesis, suggested that DICER1-AS1 can be considered as a potential biomarker and therapeutic target against OS cells.
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Affiliation(s)
- Feng Wang
- Department of Oncology, The First Affiliated Hospital of University of Science and Technology of China (USTC), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Lingsuo Kong
- Department of Anesthesiology, West district of The First Affiliated Hospital of USTC, Division of life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Youguang Pu
- Department of Cancer Epigenetics Program, Anhui Provincial Cancer Hospital, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Fengmei Chao
- Department of Cancer Epigenetics Program, Anhui Provincial Cancer Hospital, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Chunbao Zang
- Department of Radiation Oncology, Anhui Provincial Cancer Hospital, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Wei Qin
- Department of Science and Education Section, Anhui Provincial Cancer Hospital, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Fangfang Zhao
- Department of Cancer Epigenetics Program, Anhui Provincial Cancer Hospital, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Shanbao Cai
- Department of Orthopedic Surgery, Anhui Provincial Cancer Hospital, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
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Liu JY, Fu WQ, Zheng XJ, Li W, Ren LW, Wang JH, Yang C, Du GH. Avasimibe exerts anticancer effects on human glioblastoma cells via inducing cell apoptosis and cell cycle arrest. Acta Pharmacol Sin 2021; 42:97-107. [PMID: 32451414 PMCID: PMC7921416 DOI: 10.1038/s41401-020-0404-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 03/19/2020] [Indexed: 01/11/2023] Open
Abstract
Glioblastoma (GBM) is the most common and lethal primary brain tumor in adults, but there is no effective drug available for GBM. Avasimibe is a potent inhibitor of acyl-coenzyme A: cholesterol acyltransferase-1 (ACAT-1), which was used to treat atherosclerosis. Experimental evidence and bioinformatics have shown that avasimibe has anticancer activity. In this study we investigated the anticancer effects of avasimibe on human glioblastoma cells and the underlying mechanisms. Our results showed that avasimibe dose-dependently inhibited the proliferation of U251 and U87 human glioblastoma cells with IC50 values of 20.29 and 28.27 μM, respectively, at 48 h. Avasimibe (7.5, 15, 30 μM) decreased the DNA synthesis, and inhibited the colony formation of the tumor cells. Treatment of avasimibe also dose-dependently increased the apoptotic rate of tumor cells, decreased the mitochondrial membrane potential, induced the activity of caspase-3/7, and increased the protein expression of cleaved caspase-9, cleaved PARP and Bax in U251 and U87 cells. RNA-sequencing analyses revealed that avasimibe suppressed the expression of CDK2, cyclin E1, CDK4, cyclin D, CDK1, cyclin B1, Aurora A, and PLK1, while induced the expression of p53, p21, p27, and GADD45A, which was validated by Western blot analysis. These results demonstrated that avasimibe induced mitochondria-dependent apoptosis in glioblastoma cells, which was associated with arresting the cell cycle at G0/G1 phase and G2/M phase by regulating the p53/p21 pathway, p53/GADD45A and Aurora A/PLK1 signaling pathways. In U87 xenograft nude mice model, administration of avasimibe (15, 30 mg·kg-1·d-1, ip, for 18 days) dose-dependently inhibit the tumor growth. Taken together, our results demonstrated that avasimibe might be a promising chemotherapy drug in the treatment of GBM.
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Affiliation(s)
- Jin-Yi Liu
- The State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing, 100050, China
- Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Wei-Qi Fu
- The State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing, 100050, China
- Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Xiang-Jin Zheng
- The State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing, 100050, China
- Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Wan Li
- The State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing, 100050, China
- Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Li-Wen Ren
- The State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing, 100050, China
- Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Jin-Hua Wang
- The State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing, 100050, China.
- Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China.
| | - Cui Yang
- Ethnic Drug Screening & Pharmacology Center, Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming, 650500, China.
| | - Guan-Hua Du
- The State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing, 100050, China.
- Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China.
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Yang F, Liu WW, Chen H, Zhu J, Huang AH, Zhou F, Gan Y, Zhang YH, Ma L. Carfilzomib inhibits the growth of lung adenocarcinoma via upregulation of Gadd45a expression. J Zhejiang Univ Sci B 2020; 21:64-76. [PMID: 31898443 DOI: 10.1631/jzus.b1900551] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Proteasome inhibitors have shown remarkable success in the treatment of hematologic neoplasm. There has been a lot of attention to applying these drugs for solid tumor treatment. Recent preclinical study has signified the effectiveness on cell proliferation inhibition in lung adenocarcinoma treated by carfilzomib (CFZ), a second generation proteasome inhibitor. However, no insight has been gained regarding the mechanism. In this study, we have systematically investigated the CFZ functions in cell proliferation and growth, cell cycle arrest, and apoptosis in lung adenocarcinoma cells. Flow cytometry experiments showed that CFZ significantly induced G2/M cell cycle arrest and apoptosis in lung adenocarcinoma. MTS and colony formation assays revealed that CFZ substantially inhibited survival of lung adenocarcinoma cells. All results were consistently correlated to the upregulation expression of Gadd45a, which is an important gene in modulating cell cycle arrest and apoptosis in response to physiologic and environmental stresses. Here, upregulation of Gadd45a expression was observed after CFZ treatment. Knocking down Gadd45a expression suppressed G2/M arrest and apoptosis in CFZ-treated cells, and reduced cytotoxicity of this drug. The protein expression analysis has further identified that the AKT/FOXO3a pathway is involved in Gadd45a upregulation after CFZ treatment. These findings unveil a novel mechanism of proteasome inhibitor in anti-solid tumor activity, and shed light on novel preferable therapeutic strategy for lung adenocarcinoma. We believe that Gadd45a expression can be a highly promising candidate predictor in evaluating the efficacy of proteasome inhibitors in solid tumor therapy.
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Affiliation(s)
- Fang Yang
- Department of Pathology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Wang-Wang Liu
- Department of Pathology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Hui Chen
- Department of Pathology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Jia Zhu
- Department of Pathology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Ai-Hua Huang
- Department of Pathology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Fei Zhou
- Department of Radiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Yi Gan
- Department of Pathology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Yan-Hua Zhang
- Department of Pathology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Li Ma
- Department of Neurosurgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
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11
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You W, Xu Z, Shan T. Regulatory Roles of GADD45α in Skeletal Muscle and Adipocyte. Curr Protein Pept Sci 2020; 20:918-925. [PMID: 31232235 DOI: 10.2174/1389203720666190624143503] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 06/02/2019] [Accepted: 06/11/2019] [Indexed: 02/07/2023]
Abstract
GADD45α, a member of the GADD45 family proteins, is involved in various cellular processes including the maintenance of genomic integrity, growth arrest, apoptosis, senescence, and signal transduction. In skeletal muscle, GADD45α plays an important role in regulating mitochondrial biogenesis and muscle atrophy. In adipocytes, GADD45α regulates preadipocyte differentiation, lipid accumulation, and thermogenesis metabolism. Moreover, it has been recently demonstrated that GADD45α promotes gene activation by inducing DNA demethylation. The epigenetic function of GADD45α is important for preadipocyte differentiation and transcriptional regulation during development. This article mainly reviews and discusses the regulatory roles of GADD45α in skeletal muscle development, adipocyte progenitor differentiation, and DNA demethylation.
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Affiliation(s)
- Wenjing You
- College of Animal Sciences, Zhejiang University; The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang Provincial Laboratory of Feed and Animal Nutrition, No. 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, China
| | - Ziye Xu
- College of Animal Sciences, Zhejiang University; The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang Provincial Laboratory of Feed and Animal Nutrition, No. 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University; The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang Provincial Laboratory of Feed and Animal Nutrition, No. 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, China
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12
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8-Acetonyldihydronitidine inhibits the proliferation of human colorectal cancer cells via activation of p53. Eur J Pharmacol 2019; 854:256-264. [DOI: 10.1016/j.ejphar.2019.03.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 03/14/2019] [Accepted: 03/22/2019] [Indexed: 12/27/2022]
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13
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Fang L, Du WW, Awan FM, Dong J, Yang BB. The circular RNA circ-Ccnb1 dissociates Ccnb1/Cdk1 complex suppressing cell invasion and tumorigenesis. Cancer Lett 2019; 459:216-226. [PMID: 31199987 DOI: 10.1016/j.canlet.2019.05.036] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/22/2019] [Accepted: 05/24/2019] [Indexed: 01/13/2023]
Abstract
Circular RNAs represent a large class of non-coding RNAs that are extensively expressed in mammals. However, the functions of circular RNAs are largely unknown. We recently reported that the circular RNA circ-Ccnb1 could bind with H2AX in p53 mutant cells and suppressed mutant p53 in tumor progression. Here we found that circ-Ccnb1 could interact with both Ccnb1 and Cdk1 proteins. Normally, Ccnb1 and Cdk1 proteins form a complex, allowing Ccnb1 to function as an all-or-none switch for cell mitosis. The interaction of circ-Ccnb1 with Ccnb1 and Cdk1 proteins dissociated the formation of Ccnb1-Cdk1 complex, by forming a large complex containing circ-Ccnb1, Ccnb1 and Cdk1. Formation of this large complex may occur in cytosol and nuclei, and Ccnb1 loses its roles in enhancing cell migration, invasion, proliferation and survival. In vivo, ectopic delivery of circ-Ccnb1 inhibited tumor growth and extended mouse viability. These results have added another layer of mechanisms for circ-Ccnb1 to regulate tumor progression in vitro and in vivo.
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Affiliation(s)
- Ling Fang
- Sunnybrook Research Institute, Toronto, Canada; China-Japan Union Hospital of Jilin University, Jilin, China
| | | | - Faryal Mehwish Awan
- Sunnybrook Research Institute, Toronto, Canada; Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12, Islamabad, Pakistan
| | - Jun Dong
- Sunnybrook Research Institute, Toronto, Canada; The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Burton B Yang
- Sunnybrook Research Institute, Toronto, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada.
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14
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Camilleri-Robles C, Serras F, Corominas M. Role of D-GADD45 in JNK-Dependent Apoptosis and Regeneration in Drosophila. Genes (Basel) 2019; 10:E378. [PMID: 31109086 PMCID: PMC6562583 DOI: 10.3390/genes10050378] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 05/14/2019] [Accepted: 05/16/2019] [Indexed: 12/11/2022] Open
Abstract
The GADD45 proteins are induced in response to stress and have been implicated in the regulation of several cellular functions, including DNA repair, cell cycle control, senescence, and apoptosis. In this study, we investigate the role of D-GADD45 during Drosophila development and regeneration of the wing imaginal discs. We find that higher expression of D-GADD45 results in JNK-dependent apoptosis, while its temporary expression does not have harmful effects. Moreover, D-GADD45 is required for proper regeneration of wing imaginal discs. Our findings demonstrate that a tight regulation of D-GADD45 levels is required for its correct function both, in development and during the stress response after cell death.
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Affiliation(s)
- Carlos Camilleri-Robles
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia and Institut de Biomedicina (IBUB), Universitat de Barcelona, Barcelona 08028, Spain.
| | - Florenci Serras
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia and Institut de Biomedicina (IBUB), Universitat de Barcelona, Barcelona 08028, Spain.
| | - Montserrat Corominas
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia and Institut de Biomedicina (IBUB), Universitat de Barcelona, Barcelona 08028, Spain.
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15
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Chen P, Wang H, He M, Chen B, Yang B, Hu B. Size-dependent cytotoxicity study of ZnO nanoparticles in HepG2 cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 171:337-346. [PMID: 30616150 DOI: 10.1016/j.ecoenv.2018.12.096] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 12/26/2018] [Accepted: 12/27/2018] [Indexed: 05/27/2023]
Abstract
Zinc oxide (ZnO) nanoparticles (NPs) are widely used in daily life. However, common utilization of ZnO NPs results in increases in environmental release, and their health hazards have attracted extensive attention. To investigate the cytotoxicity of ZnO NPs and their mechanism in HepG2 cells, a comprehensive analytical system was developed. The internalization, cytotoxic mechanism, death mechanism and elimination behavior of three sizes of ZnO NPs were studied by electrothermal vaporization (ETV)-inductively coupled plasma mass spectrometry (ICP-MS), MTT assays, GSH measurements, ROS measurements and analyses of apoptosis and gene expression. The size-, dose- and time-dependent characteristics of ZnO NPs were determined, and the metabolism of ZnO NPs in cells was discussed. The cytotoxicity of ZnO NPs was confirmed to depend on both the size and concentration and was attributed to the release of Zn2+, induction of oxidative stress and inflammatory response; the death mode of HepG2 cells incubated with ZnO NPs was necrotic rather than programmed cell death.
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Affiliation(s)
- Pengyu Chen
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Han Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Man He
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Beibei Chen
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Bin Yang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Bin Hu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China.
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16
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Doan P, Musa A, Candeias NR, Emmert-Streib F, Yli-Harja O, Kandhavelu M. Alkylaminophenol Induces G1/S Phase Cell Cycle Arrest in Glioblastoma Cells Through p53 and Cyclin-Dependent Kinase Signaling Pathway. Front Pharmacol 2019; 10:330. [PMID: 31001122 PMCID: PMC6454069 DOI: 10.3389/fphar.2019.00330] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Accepted: 03/19/2019] [Indexed: 12/22/2022] Open
Abstract
Glioblastoma (GBM) is the most common type of malignant brain tumor in adults. We show here that small molecule 2-[(3,4-dihydroquinolin-1(2H)-yl)(p-tolyl)methyl]phenol (THTMP), a potential anticancer agent, increases the human glioblastoma cell death. Its mechanism of action and the interaction of selective signaling pathways remain elusive. Three structurally related phenolic compounds were tested in multiple glioma cell lines in which the potential activity of the compound, THTMP, was further validated and characterized. Upon prolonged exposer to THTMP, all glioma cell lines undergo p53 and cyclin-dependent kinase mediated cell death with the IC50 concentration of 26.5 and 75.4 μM in LN229 and Snb19, respectively. We found that THTMP strongly inhibited cell growth in a dose and in time dependent manner. THTMP treatment led to G1/S cell cycle arrest and apoptosis induction of glioma cell lines. Furthermore, we identified 3,714 genes with significant changes at the transcriptional level in response to THTMP. Further, a transcriptional analysis (RNA-seq) revealed that THTMP targeted the p53 signaling pathway specific genes causing DNA damage and cell cycle arrest at G1/S phase explained by the decrease of cyclin-dependent kinase 1, cyclin A2, cyclin E1 and E2 in glioma cells. Consistently, THTMP induced the apoptosis by regulating the expression of Bcl-2 family genes and reactive oxygen species while it also changed the expression of several anti-apoptotic genes. These observations suggest that THTMP exerts proliferation activity inhibition and pro-apoptosis effects in glioma through affecting cell cycle arrest and intrinsic apoptosis signaling. Importantly, THTMP has more potential at inhibiting GBM cell proliferation compared to TMZ, the current chemotherapy treatment administered to GBM patients; thus, we propose that THTMP may be an alternative therapeutic option for glioblastoma.
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Affiliation(s)
- Phuong Doan
- Molecular Signaling Lab, Faculty of Medicine and Health Technology, Tampere University and BioMediTech, Tampere, Finland.,Institute of Biosciences and Medical Technology, Tampere, Finland
| | - Aliyu Musa
- Institute of Biosciences and Medical Technology, Tampere, Finland.,Predictive Medicine and Data Analytics Lab, Faculty of Medicine and Health Technology, Tampere University and BioMediTech, Tampere, Finland
| | - Nuno R Candeias
- Faculty of Engineering and Natural Sciences, Tampere University, Tampere, Finland
| | - Frank Emmert-Streib
- Institute of Biosciences and Medical Technology, Tampere, Finland.,Predictive Medicine and Data Analytics Lab, Faculty of Medicine and Health Technology, Tampere University and BioMediTech, Tampere, Finland
| | - Olli Yli-Harja
- Institute of Biosciences and Medical Technology, Tampere, Finland.,Computaional Systems Biology Group, Faculty of Medicine and Health Technology, Tampere University and BioMediTech, Tampere, Finland.,Institute for Systems Biology, Seattle, WA, United States
| | - Meenakshisundaram Kandhavelu
- Molecular Signaling Lab, Faculty of Medicine and Health Technology, Tampere University and BioMediTech, Tampere, Finland.,Institute of Biosciences and Medical Technology, Tampere, Finland
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17
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Cheng AC, Hsu YC, Tsai CC. The effects of cucurbitacin E on GADD45β-trigger G2/M arrest and JNK-independent pathway in brain cancer cells. J Cell Mol Med 2019; 23:3512-3519. [PMID: 30912292 PMCID: PMC6484297 DOI: 10.1111/jcmm.14250] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/17/2019] [Accepted: 01/31/2019] [Indexed: 01/15/2023] Open
Abstract
Cucurbitacin E (CuE), an active compound of the cucurbitacin family, possesses a variety of pharmacological functions and chemotherapy potential. Cucurbitacin E exhibits inhibitory effects in several types of cancer; however, its anticancer effects on brain cancer remain obscure and require further interpretation. In this study, efforts were initiated to inspect whether CuE can contribute to anti-proliferation in human brain malignant glioma GBM 8401 cells and glioblastoma-astrocytoma U-87-MG cells. An MTT assay measured CuE's inhibitory effect on the growth of glioblastomas (GBMs). A flow cytometry approach was used for the assessment of DNA content and cell cycle analysis. DNA damage 45β (GADD45β) gene expression and CDC2/cyclin-B1 disassociation were investigated by quantitative real-time PCR and Western blot analysis. Based on our results, CuE showed growth-inhibiting effects on GBM 8401 and U-87-MG cells. Moreover, GADD45β caused the accumulation of CuE-treated G2/M-phase cells. The disassociation of the CDC2/cyclin-B1 complex demonstrated the known effects of CuE against GBM 8401 and U-87-MG cancer cells. Additionally, CuE may also exert antitumour activities in established brain cancer cells. In conclusion, CuE inhibited cell proliferation and induced mitosis delay in cancer cells, suggesting its potential applicability as an antitumour agent.
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Affiliation(s)
- An-Chin Cheng
- Department of Nutrition and Health Sciences, College of Health Sciences, Chang Jung Christian University, Tainan, Taiwan
| | - Yi-Chiang Hsu
- Department of Medical Sciences Industry, College of Health Sciences, Chang Jung Christian University, Tainan, Taiwan
| | - Chiang-Chin Tsai
- Department of General Surgery, Tainan Sin Lau Hospital, The Presbyterian Church in Taiwan, Tainan, Taiwan.,Department of Health Care Administration, College of Health Sciences, Chang Jung Christian University, Tainan, Taiwan
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18
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Li C, Ming Y, Wang Z, Xu Q, Yao L, Xu D, Tang Y, Lei X, Li X, Mao Y. GADD45α alleviates acetaminophen-induced hepatotoxicity by promoting AMPK activation. Cell Mol Life Sci 2019; 76:129-145. [PMID: 30151693 PMCID: PMC11105285 DOI: 10.1007/s00018-018-2912-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 07/31/2018] [Accepted: 08/22/2018] [Indexed: 02/08/2023]
Abstract
As an analgesic and antipyretic drug, acetaminophen (APAP) is commonly used and known to be safe at therapeutic doses. In many countries, the overuse of APAP provokes acute liver injury and even liver failure. APAP-induced liver injury (AILI) is the most used experimental model of drug-induced liver injury (DILI). Here, we have demonstrated elevated levels of growth arrest and DNA damage-inducible 45α (GADD45α) in the livers of patients with DILI/AILI, in APAP-injured mouse livers and in APAP-treated hepatocytes. GADD45α exhibited a protective effect against APAP-induced liver injury and alleviated the accumulation of small lipid droplets in vitro and in vivo. We found that GADD45α promoted the activation of AMP-activated protein kinase α and induced fatty acid beta-oxidation, tricarboxylic acid cycle (TCA) and glycogenolysis-related gene expression after APAP exposure. Liquid chromatography-mass spectrometry (LC-MS) analysis showed that GADD45α increased the levels of TCA cycle metabolites. Co-immunoprecipitation analysis showed that Ppp2cb, a catalytic subunit of protein phosphatase 2A, could interact directly with GADD45α. Our results indicate that hepatocyte GADD45α might represent a therapeutic target to prevent and rescue liver injury caused by APAP.
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Affiliation(s)
- Chunmin Li
- Division of Gastroenterology and Hepatology, School of Medicine, Shanghai Institute of Digestive Disease, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yanan Ming
- Division of Gastroenterology and Hepatology, School of Medicine, Shanghai Institute of Digestive Disease, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Zhengyang Wang
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, Henan, China
| | - Qingling Xu
- Department of Hepatology, Mengchao Hepatobiliary Hospital, Fujian Medical University, Fuzhou, Fujian, China
| | - Lvfeng Yao
- Department of Hepatology, Mengchao Hepatobiliary Hospital, Fujian Medical University, Fuzhou, Fujian, China
| | - Dongke Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Yingyue Tang
- Division of Gastroenterology and Hepatology, School of Medicine, Shanghai Institute of Digestive Disease, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaohong Lei
- Division of Gastroenterology and Hepatology, School of Medicine, Shanghai Institute of Digestive Disease, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaobo Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China.
| | - Yimin Mao
- Division of Gastroenterology and Hepatology, School of Medicine, Shanghai Institute of Digestive Disease, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China.
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19
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Transcriptomic Profiles in Zebrafish Liver Permit the Discrimination of Surface Water with Pollution Gradient and Different Discharges. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15081648. [PMID: 30081495 PMCID: PMC6122030 DOI: 10.3390/ijerph15081648] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/24/2018] [Accepted: 08/02/2018] [Indexed: 01/23/2023]
Abstract
The present study aims to evaluate the potential of transcriptomic profiles in evaluating the impacts of complex mixtures of pollutants at environmentally relevant concentrations on aquatic vertebrates. The changes in gene expression were determined using microarray in the liver of male zebrafish (Danio rerio) exposed to surface water collected from selected locations on the Hun River, China. The numbers of differentially expressed genes (DEGs) in each treatment ranged from 728 to 3292, which were positively correlated with chemical oxygen demand (COD). Predominant transcriptomic responses included peroxisome proliferator-activated receptors (PPAR) signaling and steroid biosynthesis. Key pathways in immune system were also affected. Notably, two human diseases related pathways, insulin resistance and Salmonella infection were enriched. Clustering analysis and principle component analysis with DEGs differentiated the upstream and downstream site of Shenyang City, and the mainstream and the tributary sites near the junction. Comparison the gene expression profiles of zebrafish exposed to river surface water with those to individual chemicals found higher similarity of the river water with estradiol than several other organic pollutants and metals. Results suggested that the transcriptomic profiles of zebrafish is promising in differentiating surface water with pollution gradient and different discharges and in providing valuable information to support discharge management.
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20
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Cui D, Sajan P, Shi J, Shen Y, Wang K, Deng X, Zhou L, Hu P, Gao L. MiR-148a increases glioma cell migration and invasion by downregulating GADD45A in human gliomas with IDH1 R132H mutations. Oncotarget 2018; 8:25345-25361. [PMID: 28445981 PMCID: PMC5421935 DOI: 10.18632/oncotarget.15867] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 02/13/2017] [Indexed: 01/09/2023] Open
Abstract
High-grade gliomas are severe tumors with poor prognosis. An R132H mutation in the isocitrate dehydrogenase (IDH1) gene prolongs the life of glioma patients. In this study, we investigated which genes are differentially regulated in IDH1 wild type (IDH1WT) or IDH1 R132H mutation (IDH1R132H) glioblastoma cells. Growth arrest and DNA-damage-inducible protein (GADD45A) was downregulated and microRNA 148a (miR-148a) was upregulated in in IDH1R132H human glioblastomas tissues. The relationship between GADD45A and miR-148a is unknown. In vitro experiments showed that GADD45A negatively regulates IDH1R132H glioma cell proliferation, migration, and invasion, and neurosphere formation in IDH1R132H glioblastoma stem cells (GSC). In addition, a human orthotopic xenograft mouse model showed that GADD45A reduced tumorigenesis in vivo. Our findings demonstrated that miR-148a promotes glioma cell invasion and tumorigenesis by downregulating GADD45A. Our findings provide novel insights into how GADD45A is downregulated by miR-148a in IDH1R132H glioma and may help to identify therapeutic targets for the effective treatment of high-grade glioma.
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Affiliation(s)
- Daming Cui
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China
| | - Pandey Sajan
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China
| | - Jinlong Shi
- Department of Neurosurgery, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Yiwen Shen
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200070, People's Republic of China
| | - Ke Wang
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China
| | - Xianyu Deng
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China
| | - Lin Zhou
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China
| | - Pingping Hu
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China
| | - Liang Gao
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China
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21
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The β-catenin/CBP-antagonist ICG-001 inhibits pediatric glioma tumorigenicity in a Wnt-independent manner. Oncotarget 2018; 8:27300-27313. [PMID: 28460484 PMCID: PMC5432336 DOI: 10.18632/oncotarget.15934] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 02/20/2017] [Indexed: 12/12/2022] Open
Abstract
Pediatric high-grade gliomas (pedHGG) belong to the most aggressive cancers in children with a poor prognosis due to a lack of efficient therapeutic strategies. The β-catenin/Wnt-signaling pathway was shown to hold promising potential as a treatment target in adult high-grade gliomas by abrogating tumor cell invasion and the acquisition of stem cell-like characteristics. Since pedHGG differ from their adult counterparts in genetically and biologically we aimed to investigate the effects of β-catenin/Wnt-signaling pathway-inhibition by the β-catenin/CBP antagonist ICG-001 in pedHGG cell lines. In contrast to adult HGG, pedHGG cells displayed minimal detectable canonical Wnt-signaling activity. Nevertheless, low doses of ICG-001 inhibited cell migration/invasion, tumorsphere- and colony formation, proliferation in vitro as well as tumor growth in vivo/ovo, suggesting that ICG-001 affects pedHGG tumor cell characteristics independent of β-catenin/Wnt-signaling. RNA-sequencing analyses support a Wnt/β-catenin-independent effect of ICG-001 on target gene transcription, revealing strong effects on genes involved in cellular metabolic/biosynthetic processes and cell cycle progression. Among these, high mRNA expression of cell cycle regulator JDP2 was found to confer a better prognosis for pedHGG patients. In conclusion, ICG-001 might offer an effective treatment option for pedHGG patients functioning to regulate cell phenotype and gene expression programs in absence of Wnt/β-catenin signaling-activity.
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22
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Lee NK. Preservation effects of geniposidic acid on human keratinocytes (HaCaT) against UVB. BIOMEDICAL DERMATOLOGY 2018. [DOI: 10.1186/s41702-017-0015-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Gadd45a opens up the promoter regions of miR-295 facilitating pluripotency induction. Cell Death Dis 2017; 8:e3107. [PMID: 29022923 PMCID: PMC5682663 DOI: 10.1038/cddis.2017.497] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 08/13/2017] [Accepted: 08/31/2017] [Indexed: 12/13/2022]
Abstract
MicroRNAs (miRNAs) play crucial roles in the establishment of pluripotent state by controlling pluripotent network. However, the molecular mechanisms controlling miRNAs during somatic cell reprogramming remain obscure. In this study, we show Gadd45a (growth arrest and DNA-damage-inducible protein 45a) enhances reprogramming by activating miR-295. Furthermore, we show that Gadd45a binds the promoter regions of miR-295. Nuclease accessibility assay indicates that Gadd45a opens the promoter regions of miR-295. Levels of H3K9Ac and H3K27Ac on the promoter regions of miR-295 were also increased. In conclusion, our results indicate that Gadd45a relaxes the promoter regions of miR-295 and promotes the expression of miR-295 during reprogramming, implying a concise mechanism of Gadd45a and miR-290 cluster cooperation in cell-fate determination.
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Menzel F, Kaiser N, Haehnel S, Rapp F, Patties I, Schöneberg N, Haimon Z, Immig K, Bechmann I. Impact of X-irradiation on microglia. Glia 2017; 66:15-33. [DOI: 10.1002/glia.23239] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 09/05/2017] [Accepted: 09/18/2017] [Indexed: 12/20/2022]
Affiliation(s)
| | - Nicole Kaiser
- Institute of Anatomy, Leipzig University; Leipzig Germany
| | - Susann Haehnel
- Institute of Anatomy, Leipzig University; Leipzig Germany
| | - Felicitas Rapp
- Institute of Anatomy, Leipzig University; Leipzig Germany
| | - Ina Patties
- Department of Radiation Therapy; Leipzig University; Leipzig Germany
| | | | - Zhana Haimon
- Department of Immunology; Weizmann Institute of Science; Rehovot Israel
| | - Kerstin Immig
- Institute of Anatomy, Leipzig University; Leipzig Germany
| | - Ingo Bechmann
- Institute of Anatomy, Leipzig University; Leipzig Germany
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25
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Ma J, Li X. High-throughput sequencing provides an insight into the hepatotoxicity mechanism of MC-LR in HepG2 cells. TOXIN REV 2017. [DOI: 10.1080/15569543.2017.1318403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Junguo Ma
- College of Life Science, Henan Normal University, Xinxiang, Henan, China
| | - Xiaoyu Li
- College of Life Science, Henan Normal University, Xinxiang, Henan, China
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Huang WS, Kuo YH, Kuo HC, Hsieh MC, Huang CY, Lee KC, Lee KF, Shen CH, Tung SY, Teng CC. CIL-102-Induced Cell Cycle Arrest and Apoptosis in Colorectal Cancer Cells via Upregulation of p21 and GADD45. PLoS One 2017; 12:e0168989. [PMID: 28068431 PMCID: PMC5221879 DOI: 10.1371/journal.pone.0168989] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 12/09/2016] [Indexed: 01/19/2023] Open
Abstract
CIL-102 (1-[4-(furo[2,3-b]quinolin-4-ylamino)phenyl]ethanone) is a well-known, major active agent of the alkaloid derivative of Camptotheca acuminata with valuable biological properties, including anti-tumorigenic activity. In this study, we investigated the molecular mechanisms by which CIL-102 mediated the induction of cell death, and we performed cell cycle G2/M arrest to clarify molecular changes in colorectal cancer cells (CRC). Treatment of DLD-1 cells with CIL-102 resulted in triggering the extrinsic apoptosis pathway through the activation of Fas-L, caspase-8 and the induction of Bid cleavage and cytochrome c release in a time-dependent manner. In addition, CIL-102 mediated apoptosis and G2/M arrest by phosphorylation of the Jun N-terminus kinase (JNK1/2) signaling pathway. This resulted in the expression of NFκB p50, p300 and CREB-binding protein (CBP) levels, and in the induction of p21 and GADD45 as well as the decreased association of cdc2/cyclin B. Furthermore, treatment with the JNK1/2 (SP600125), NFκB (PDTI) or the p300/CBP (C646) inhibitors abolished CIL-102-induced cell cycle G2/M arrest and reversed the association of cdc2 with cyclin B. Therefore, we demonstrated that there was an increase in the cellular levels of p21 and GADD45 by CIL-102 reduction in cell viability and cell cycle arrest via the activation of the JNK1/2, NFκB p50, p300 and CBP signaling modules. Collectively, our results demonstrated that CIL-102 induced cell cycle arrest and apoptosis of colon cancer cells by upregulating p21 and GADD45 expression and by activating JNK1/2, NFκB p50 and p300 to provide a new mechanism for CIL-102 treatment.
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Affiliation(s)
- Wen-Shih Huang
- Division of Colon and Rectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan
- Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Yi-Hung Kuo
- Division of Colon and Rectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Chiayi, Taiwan
| | - Hsing-Chun Kuo
- Department of Nursing, Chang Gung University of Science and Technology, Chiayi, Taiwan
- Research Center for Industry of Human Ecology and Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan, Taiwan
- Chronic Diseases and Health Promotion Research Center, CGUST, Chiayi, Taiwan
| | - Meng-Chiao Hsieh
- Division of Colon and Rectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Chiayi, Taiwan
| | - Cheng-Yi Huang
- Division of Colon and Rectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Ko-Chao Lee
- Division of Colorectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Kam-Fai Lee
- Department of Pathology, Chang Gung Memorial Hospital at Chiayi, Taiwan
| | - Chien-Heng Shen
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Chiayi, Taiwan
- Department of Hepato-Gastroenterology, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Shui-Yi Tung
- Chang Gung University College of Medicine, Taoyuan, Taiwan
- Department of Hepato-Gastroenterology, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Chih-Chuan Teng
- Department of Nursing, Chang Gung University of Science and Technology, Chiayi, Taiwan
- Chronic Diseases and Health Promotion Research Center, CGUST, Chiayi, Taiwan
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Yamaguchi Y, Madhyastha H, Madhyastha R, Choijookhuu N, Hishikawa Y, Pengjam Y, Nakajima Y, Maruyama M. Arsenic acid inhibits proliferation of skin fibroblasts, and increases cellular senescence through ROS mediated MST1-FOXO signaling pathway. J Toxicol Sci 2016; 41:105-13. [PMID: 26763397 DOI: 10.2131/jts.41.105] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Arsenic exposure through drinking water is a major public health problem. It causes a number of toxic effects on skin. Arsenic has been reported to inhibit cell proliferation in in vitro conditions. However, reports about the molecular mechanisms are limited. Here, we investigated the mechanism involved in arsenic acid-mediated inhibition of cell proliferation using mouse skin fibroblast cell line. The present study found that 10 ppm arsenic acid inhibited cell proliferation, without any effect on cell death. Arsenic acid induced the generation of reactive oxygen species (ROS), resulting in oxidative stress to DNA. It also activated the mammalian Ste20-like protein kinase 1 (MST1); however the serine/threonine kinase Akt was downregulated. Forkhead box O (FOXO) transcription factors are activated through phosphorylation by MST1 under stress conditions. They are inhibited by phosphorylation by Akt through external and internal stimuli. Activation of FOXOs results in their nuclear localization, followed by an increase in transcriptional activity. Our results showed that arsenic induced the nuclear translocation of FOXO1 and FOXO3a, and altered the cell cycle, with cells accumulating at the G2/M phase. These effects caused cellular senescence. Taken together, our results indicate that arsenic acid inhibited cell proliferation through cellular senescence process regulated by MST1-FOXO signaling pathway.
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Affiliation(s)
- Yuya Yamaguchi
- Department of Applied Physiology, Faculty of Medicine, University of Miyazaki
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Anbumani S, Mohankumar MN. Gene expression in Catla catla (Hamilton) subjected to acute and protracted doses of gamma radiation. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 178:153-157. [PMID: 27497304 DOI: 10.1016/j.aquatox.2016.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 07/25/2016] [Accepted: 07/27/2016] [Indexed: 06/06/2023]
Abstract
Studies on transcriptional modulation after gamma radiation exposure in fish are limited. Cell cycle perturbations and expression of apoptotic genes were investigated in the fish, Catla catla after acute and protracted exposures to gamma radiation over a 90day period. Significant changes in gene expression were observed between day 1 and 90 post-exposure. Gamma radiation induced a significant down-regulation of target genes gadd45α, cdk1 and bcl-2 from day 1 to day 3 after protracted exposure, whereas it persists till day 6 upon acute exposure. From day 12 onwards, Gadd45α, cdk1 and bcl-2 genes were up-regulated following protracted exposure, indicating DNA repair, cell-cycle arrest and apoptosis. There exists a linear correlation between these genes (gadd45α - r=0.85, p=0.0073; cdk1 - r=0.86, p=0.0053; bcl-2 - r=0.89, p=0.0026) at protracted exposures. This is the first report on the dual role of bcl-2 gene in fish exposed to acute and protracted radiation and correlation among the aforementioned genes that work in concert to promote 'repair' and 'death' circuitries in fish blood cells.
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Affiliation(s)
- S Anbumani
- Radiological Safety Division, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, Tamilnadu 603102 India.
| | - Mary N Mohankumar
- Radiological Safety Division, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, Tamilnadu 603102 India.
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Novak M, Žegura B, Baebler Š, Štern A, Rotter A, Stare K, Filipič M. Influence of selected anti-cancer drugs on the induction of DNA double-strand breaks and changes in gene expression in human hepatoma HepG2 cells. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:14751-14761. [PMID: 26392091 DOI: 10.1007/s11356-015-5420-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 09/14/2015] [Indexed: 06/05/2023]
Abstract
In chemotherapy, various anti-cancer drugs with different mechanisms of action are used and may represent different risk of undesirable delayed side effects in treated patients as well as in occupationally exposed populations. The aim of the present study was to evaluate genotoxic potential of four widely used anti-cancer drugs with different mechanisms of action: 5-fluorouracil (5-FU), cisplatin (CDDP) and etoposide (ET) that cause cell death by targeting DNA function and imatinib mesylate (IM) that inhibits targeted protein kinases in cancer cells in an experimental model with human hepatoma HepG2 cells. After 24 h of exposure all four anti-cancer drugs at non-cytotoxic concentrations induced significant increase in formation of DNA double strand breaks (DSBs), with IM being the least effective. The analysis of the changes in the expression of genes involved in the response to DNA damage (CDKN1A, GADD45A, MDM2), apoptosis (BAX, BCL2) and oncogenesis (MYC, JUN) showed that 5-FU, CDDP and ET upregulated the genes involved in DNA damage response, while the anti-apoptotic gene BCL2 and oncogene MYC were downregulated. On the contrary, IM did not change the mRNA level of the studied genes, showing different mechanism of action that probably does not involve direct interaction with DNA processing. Genotoxic effects of the tested anti-cancer drugs were observed at their therapeutic concentrations that may consequently lead to increased risk for development of delayed adverse effects in patients. In addition, considering the genotoxic mechanism of action of 5-FU, CDDP and ET an increased risk can also not be excluded in occupationally exposed populations. The results also indicate that exposure to 5-FU, CDDP and ET represent a higher risk for delayed effects such as cancer, reproductive effects and heritable disease than exposure to IM.
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Affiliation(s)
- Matjaž Novak
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
- Ecological Engineering Institute, Maribor, Slovenia
- Jozef Stefan International Postgraduate School, Ljubljana, Slovenia
| | - Bojana Žegura
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
| | - Špela Baebler
- Department of Biotechnology and System Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Alja Štern
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
| | - Ana Rotter
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
| | - Katja Stare
- Department of Biotechnology and System Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Metka Filipič
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia.
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Liang Z, Liu R, Zhang H, Zhang S, Hu X, Tan J, Liang C, Qiao W. GADD45 proteins inhibit HIV-1 replication through specific suppression of HIV-1 transcription. Virology 2016; 493:1-11. [PMID: 26994425 DOI: 10.1016/j.virol.2016.02.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 02/14/2016] [Accepted: 02/16/2016] [Indexed: 12/16/2022]
Abstract
GADD45 proteins are a group of stress-induced proteins and participate in various cellular pathways including cell cycle regulation, cell survival and death, DNA repair and demethylation. It was recently shown that HIV-1 infection induces the expression of GADD45 proteins. However, the effect of GADD45 on HIV-1 replication has not been studied. Here, we report that overexpression of GADD45 proteins reduces HIV-1 production through suppressing transcription from the HIV-1 LTR promoter. This inhibitory effect is specific to HIV-1, since GADD45 proteins neither inhibit the LTR promoters from other retroviruses nor reduce the production of these viruses. Knockdown of endogenous GADD45 modestly activates HIV-1 in the J-Lat A72 latency cell line, which suggests GADD45 proteins might play a role in maintaining HIV-1 latency.
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Affiliation(s)
- Zhibin Liang
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China.
| | - Ruikang Liu
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China.
| | - Hui Zhang
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China.
| | - Suzhen Zhang
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China.
| | - Xiaomei Hu
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China.
| | - Juan Tan
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China.
| | - Chen Liang
- Lady Davis Institute, Jewish General Hospital, Montreal, Que., Canada H3T 1E2; Department of Medicine, McGill University, Montreal, Que., Canada; Department of Microbiology and Immunology, McGill University, Montreal, Que., Canada.
| | - Wentao Qiao
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China.
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Hong L, Sun QF, Xu TY, Wu YH, Zhang H, Fu RQ, Cai FJ, Zhou QQ, Zhou K, Du QW, Zhang D, Xu S, Ding JG. New role and molecular mechanism of Gadd45a in hepatic fibrosis. World J Gastroenterol 2016; 22:2779-2788. [PMID: 26973416 PMCID: PMC4778000 DOI: 10.3748/wjg.v22.i9.2779] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 08/04/2015] [Accepted: 11/09/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the role of Gadd45a in hepatic fibrosis and the transforming growth factor (TGF)-β/Smad signaling pathway.
METHODS: Wild-type male BALB/c mice were treated with CCl4 to induce a model of chronic liver injury. Hepatic stellate cells (HSCs) were isolated from the liver of BALB/c mice and were treated with small interfering RNAs (siRNAs) targeting Gadd45a or the pcDNA3.1-Gadd45a recombinant plasmid. Cellular α-smooth muscle actin (α-SMA), β-actin, type I collagen, phospho-Smad2, phospho-Smad3, Smad2, Smad3, and Smad4 were detected by Western blots. The mRNA levels of α-SMA, β-actin, and type I collagen were determined by quantitative real-time (qRT)-PCR analyses. Reactive oxygen species production was monitored by flow cytometry using 2,7-dichlorodihydrofluorescein diacetate. Gadd45a, Gadd45b, anti-Gadd45g, type I collagen, and SMA local expression in liver tissue were measured by histologic and immunohistochemical analyses.
RESULTS: Significant downregulation of Gadd45a, but not Gadd45b or Gadd45g, accompanied by activation of the TGF-β/Smad signaling pathways was detected in fibrotic liver tissues of mice and isolated HSCs with chronic liver injury induced by CCl4 treatment. Overexpression of Gadd45a reduced the expression of extracellular matrix proteins and α-SMA in HSCs, whereas transient knockdown of Gadd45a with siRNA reversed this process. Gadd45a inhibited the activity of a plasminogen activator inhibitor-1 promoter construct and (CAGA)9 MLP-Luc, an artificial Smad3/4-specific reporter, as well as reduced the phosphorylation and nuclear translocation of Smad3. Gadd45a showed protective effects by scavenging reactive oxygen species and upregulating antioxidant enzymes.
CONCLUSION: Gadd45a may counteract hepatic fibrosis by regulating the activation of HSCs via the inhibition of TGF-β/Smad signaling.
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Zhou X, Cui J, Liu S, Kong D, Sun H, Gu C, Wang H, Qiu X, Chang Y, Liu Z, Wang X. Comparative transcriptome analysis of papilla and skin in the sea cucumber, Apostichopus japonicus. PeerJ 2016; 4:e1779. [PMID: 26989617 PMCID: PMC4793329 DOI: 10.7717/peerj.1779] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 02/17/2016] [Indexed: 01/02/2023] Open
Abstract
Papilla and skin are two important organs of the sea cucumber. Both tissues have ectodermic origin, but they are morphologically and functionally very different. In the present study, we performed comparative transcriptome analysis of the papilla and skin from the sea cucumber (Apostichopus japonicus) in order to identify and characterize gene expression profiles by using RNA-Seq technology. We generated 30.6 and 36.4 million clean reads from the papilla and skin and de novo assembled in 156,501 transcripts. The Gene Ontology (GO) analysis indicated that cell part, metabolic process and catalytic activity were the most abundant GO category in cell component, biological process and molecular funcation, respectively. Comparative transcriptome analysis between the papilla and skin allowed the identification of 1,059 differentially expressed genes, of which 739 genes were expressed at higher levels in papilla, while 320 were expressed at higher levels in skin. In addition, 236 differentially expressed unigenes were not annotated with any database, 160 of which were apparently expressed at higher levels in papilla, 76 were expressed at higher levels in skin. We identified a total of 288 papilla-specific genes, 171 skin-specific genes and 600 co-expressed genes. Also, 40 genes in papilla-specific were not annotated with any database, 2 in skin-specific. Development-related genes were also enriched, such as fibroblast growth factor, transforming growth factor-β, collagen-α2 and Integrin-α2, which may be related to the formation of the papilla and skin in sea cucumber. Further pathway analysis identified ten KEGG pathways that were differently enriched between the papilla and skin. The findings on expression profiles between two key organs of the sea cucumber should be valuable to reveal molecular mechanisms involved in the development of organs that are related but with morphological differences in the sea cucumber.
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Affiliation(s)
- Xiaoxu Zhou
- Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian, China.,College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Jun Cui
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Shikai Liu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences and Program of Cell and Molecular Biosciences, Auburn University, Auburn, Alabama, United States
| | - Derong Kong
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - He Sun
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Chenlei Gu
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Hongdi Wang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Xuemei Qiu
- Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian, China.,College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Yaqing Chang
- Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian, China.,College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Zhanjiang Liu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences and Program of Cell and Molecular Biosciences, Auburn University, Auburn, Alabama, United States
| | - Xiuli Wang
- Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian, China.,College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
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Zhao L, Li S, Gan L, Li C, Qiu Z, Feng Y, Li J, Li L, Li C, Peng W, Xu C, Wang Z, Hui T, Ren G, Tao Q, Xiang T. Paired box 5 is a frequently methylated lung cancer tumour suppressor gene interfering β-catenin signalling and GADD45G expression. J Cell Mol Med 2016; 20:842-54. [PMID: 26843424 PMCID: PMC4831360 DOI: 10.1111/jcmm.12768] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 11/28/2015] [Indexed: 11/28/2022] Open
Abstract
Recent studies suggest that paired box 5 (PAX5) is down‐regulated in multiple tumours through its promoter methylation. However, the role of PAX5 in non‐small cell lung cancer (NSCLC) pathogenesis remains unclear. The aim of this study is to examine PAX5 expression, its methylation status, biological functions and related molecular mechanism in NSCLC. We found that PAX5 was widely expressed in normal adult tissues but silenced or down‐regulated in 88% (7/8) of NSCLC cell lines. PAX5 expression level was significantly lower in NSCLC than that in adjacent non‐cancerous tissues (P = 0.0201). PAX5 down‐regulation was closely associated with its promoter hypermethylation status and PAX5 expression could be restored by demethylation treatment. Frequent PAX5 promoter methylation in primary tumours (70%) was correlated with lung tumour histological types (P = 0.006). Ectopic expression of PAX5 in silenced lung cancer cell lines (A549 and H1975) inhibited their colony formation and cell viability, arrested cell cycle at G2 phase and suppressed cell migration/invasion as well as tumorigenicity in nude mice. Restoration of PAX5 expression resulted in the down‐regulation of β‐catenin and up‐regulation of tissue inhibitors of metalloproteinase 2, GADD45G in lung tumour cells. In summary, PAX5 was found to be an epigenetically inactivated tumour suppressor that inhibits NSCLC cell proliferation and metastasis, through down‐regulating the β‐catenin pathway and up‐regulating GADD45G expression.
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Affiliation(s)
- Lijuan Zhao
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Shuman Li
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Lin Gan
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chunhong Li
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhu Qiu
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yixiao Feng
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jisheng Li
- Department of Chemotherapy, Cancer Center, Qilu Hospital, Shandong University, Jinan, Shandong, China
| | - Lili Li
- Cancer Epigenetics Laboratory, Department of Clinical Oncology, Sir YK Pao Center for Cancer and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong and CUHK Shenzhen Research Institute, Hong Kong, China
| | - Chen Li
- Cancer Epigenetics Laboratory, Department of Clinical Oncology, Sir YK Pao Center for Cancer and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong and CUHK Shenzhen Research Institute, Hong Kong, China
| | - Weiyan Peng
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Can Xu
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhenyu Wang
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Tianli Hui
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Guosheng Ren
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qian Tao
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Cancer Epigenetics Laboratory, Department of Clinical Oncology, Sir YK Pao Center for Cancer and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong and CUHK Shenzhen Research Institute, Hong Kong, China
| | - Tingxiu Xiang
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Katagi A, Sui L, Kamitori K, Suzuki T, Katayama T, Hossain A, Noguchi C, Dong Y, Yamaguchi F, Tokuda M. Inhibitory effect of isoamericanol A from Jatropha curcas seeds on the growth of MCF-7 human breast cancer cell line by G2/M cell cycle arrest. Heliyon 2016; 2:e00055. [PMID: 27441238 PMCID: PMC4945895 DOI: 10.1016/j.heliyon.2015.e00055] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 11/13/2015] [Accepted: 12/10/2015] [Indexed: 01/03/2023] Open
Abstract
Although various parts of J. curcas (Jatropha curcas L., Euphorbiaceae) have long been used as traditional folk medicines for their antiviral, analgesic, and/or antidotal efficacies, we are the first to investigate the role of anti-carcinogenicity of isoamericanol A (IAA) from the seed extract. Our results showed that IAA is capable of inhibiting cell proliferation in a dose-dependent manner on the human cancer cell lines of MCF-7, MDA-MB231, HuH-7, and HeLa. Flow cytometry analysis showed IAA significantly induces cell cycle arrest at G2/M on MCF-7 cells. At both protein and mRNA levels examined by western blot and real-time PCR, the results revealed increased expression of BTG2 (B-cell translocation gene 2), p21 (p21WAF1/CIPI), and GADD45A (growth arrest and DNA-damage-inducible, alpha) after IAA treatment, but inversed expression in CDK1 (cyclin-dependent kinase 1) and cyclins B1 and B2. All these effects contribute to G2/M cell cycle arrest. Furthermore, these results coincide with the changes in molecular expressions determined by DNA-microarray analysis. Our findings indicate that IAA has an inhibitory effect on cell proliferation of MCF-7 through cell cycle arrest, giving it great potential as a future therapeutic reagent for cancers.
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Affiliation(s)
- Ayako Katagi
- Department of Cell Physiology, Kagawa University, Faculty of Medicine / Graduate School of Medicine, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Li Sui
- Department of Cell Physiology, Kagawa University, Faculty of Medicine / Graduate School of Medicine, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Kazuyo Kamitori
- Department of Cell Physiology, Kagawa University, Faculty of Medicine / Graduate School of Medicine, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Toshisada Suzuki
- Laboratory of Biomass Chemistry, Biological Molecular Chemistry, Kagawa University, Faculty of Agriculture / Graduate School of Agriculture, 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Takeshi Katayama
- Laboratory of Biomass Chemistry, Biological Molecular Chemistry, Kagawa University, Faculty of Agriculture / Graduate School of Agriculture, 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Akram Hossain
- Department of Cell Physiology, Kagawa University, Faculty of Medicine / Graduate School of Medicine, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Chisato Noguchi
- Department of Cell Physiology, Kagawa University, Faculty of Medicine / Graduate School of Medicine, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Youyi Dong
- Department of Cell Physiology, Kagawa University, Faculty of Medicine / Graduate School of Medicine, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Fuminori Yamaguchi
- Department of Cell Physiology, Kagawa University, Faculty of Medicine / Graduate School of Medicine, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Masaaki Tokuda
- Department of Cell Physiology, Kagawa University, Faculty of Medicine / Graduate School of Medicine, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
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The Dual Nature of Nek9 in Adenovirus Replication. J Virol 2015; 90:1931-43. [PMID: 26676776 DOI: 10.1128/jvi.02392-15] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 11/25/2015] [Indexed: 01/10/2023] Open
Abstract
UNLABELLED To successfully replicate in an infected host cell, a virus must overcome sophisticated host defense mechanisms. Viruses, therefore, have evolved a multitude of devices designed to circumvent cellular defenses that would lead to abortive infection. Previous studies have identified Nek9, a cellular kinase, as a binding partner of adenovirus E1A, but the biology behind this association remains a mystery. Here we show that Nek9 is a transcriptional repressor that functions together with E1A to silence the expression of p53-inducible GADD45A gene in the infected cell. Depletion of Nek9 in infected cells reduces virus growth but unexpectedly enhances viral gene expression from the E2 transcription unit, whereas the opposite occurs when Nek9 is overexpressed. Nek9 localizes with viral replication centers, and its depletion reduces viral genome replication, while overexpression enhances viral genome numbers in infected cells. Additionally, Nek9 was found to colocalize with the viral E4 orf3 protein, a repressor of cellular stress response. Significantly, Nek9 was also shown to associate with viral and cellular promoters and appears to function as a transcriptional repressor, representing the first instance of Nek9 playing a role in gene regulation. Overall, these results highlight the complexity of virus-host interactions and identify a new role for the cellular protein Nek9 during infection, suggesting a role for Nek9 in regulating p53 target gene expression. IMPORTANCE In the arms race that exists between a pathogen and its host, each has continually evolved mechanisms to either promote or prevent infection. In order to successfully replicate and spread, a virus must overcome every mechanism that a cell can assemble to block infection. On the other hand, to counter viral spread, cells must have multiple mechanisms to stifle viral replication. In the present study, we add to our understanding of how the human adenovirus is able to circumvent cellular roadblocks to replication. We show that the virus uses a cellular protein, Nek9, in order to block activation of p53-regulated gene GADD45A, which is an important player in stress response and p53-mediated cell cycle arrest. Importantly, our study also identifies Nek9 as a transcriptional repressor.
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Semprebon SC, Marques LA, D'Epiro GFR, de Camargo EA, da Silva GN, Niwa AM, Macedo Junior F, Mantovani MS. Antiproliferative activity of goniothalamin enantiomers involves DNA damage, cell cycle arrest and apoptosis induction in MCF-7 and HB4a cells. Toxicol In Vitro 2015; 30:250-63. [PMID: 26522230 DOI: 10.1016/j.tiv.2015.10.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 08/20/2015] [Accepted: 10/12/2015] [Indexed: 12/21/2022]
Abstract
(R)-goniothalamin (R-GNT) is a styryl lactone that exhibits antiproliferative property against several tumor cell lines. (S)-goniothalamin (S-GNT) is the synthetic enantiomer of R-GNT, and their biological properties are poorly understood. The aim of this study was to evaluate the antiproliferative mechanisms of (R)-goniothalamin and (S)-goniothalamin in MCF-7 breast cancer cells and HB4a epithelial mammary cells. To determine the mechanisms of cell growth inhibition, we analyzed the ability of R-GNT and S-GNT to induce DNA damage, cell cycle arrest and apoptosis. Moreover, the gene expression of cell cycle components, including cyclin, CDKs and CKIs, as well as of genes involved in apoptosis and the DNA damage response were evaluated. The natural enantiomer R-GNT proved more effective in both cell lines than did the synthetic enantiomer S-GNT, inhibiting cell proliferation via cell cycle arrest and apoptosis induction, likely in response to DNA damage. The cell cycle inhibition caused by R-GNT was mediated through the upregulation of CIP/KIP cyclin-kinase inhibitors and through the downregulation of cyclins and CDKs. S-GNT, in turn, was able to cause G0/G1 cell cycle arrest and DNA damage in MCF-7 cells and apoptosis induction only in HB4a cells. Therefore, goniothalamin presents potent antiproliferative activity to breast cancer cells MCF-7. However, exposure to goniothalamin brings some undesirable effects to non-tumor cells HB4a, including genotoxicity and apoptosis induction.
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Affiliation(s)
| | - Lilian Areal Marques
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, PR, Brazil
| | | | | | - Glenda Nicioli da Silva
- Departamento de Patologia, Universidade Estadual Paulista Júlio Mesquita Filho, Botucatu, SP, Brazil
| | - Andressa Megumi Niwa
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, PR, Brazil
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Madejczyk MS, Baer CE, Dennis WE, Minarchick VC, Leonard SS, Jackson DA, Stallings JD, Lewis JA. Temporal changes in rat liver gene expression after acute cadmium and chromium exposure. PLoS One 2015; 10:e0127327. [PMID: 25993096 PMCID: PMC4437902 DOI: 10.1371/journal.pone.0127327] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 04/13/2015] [Indexed: 11/18/2022] Open
Abstract
U.S. Service Members and civilians are at risk of exposure to a variety of environmental health hazards throughout their normal duty activities and in industrial occupations. Metals are widely used in large quantities in a number of industrial processes and are a common environmental toxicant, which increases the possibility of being exposed at toxic levels. While metal toxicity has been widely studied, the exact mechanisms of toxicity remain unclear. In order to further elucidate these mechanisms and identify candidate biomarkers, rats were exposed via a single intraperitoneal injection to three concentrations of CdCl2 and Na2Cr2O7, with livers harvested at 1, 3, or 7 days after exposure. Cd and Cr accumulated in the liver at 1 day post exposure. Cd levels remained elevated over the length of the experiment, while Cr levels declined. Metal exposures induced ROS, including hydroxyl radical (•OH), resulting in DNA strand breaks and lipid peroxidation. Interestingly, ROS and cellular damage appeared to increase with time post-exposure in both metals, despite declines in Cr levels. Differentially expressed genes were identified via microarray analysis. Both metals perturbed gene expression in pathways related to oxidative stress, metabolism, DNA damage, cell cycle, and inflammatory response. This work provides insight into the temporal effects and mechanistic pathways involved in acute metal intoxication, leading to the identification of candidate biomarkers.
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Affiliation(s)
- Michael S. Madejczyk
- ORISE Postdoctoral Fellow at the US Army Center for Environmental Health Research, Fort Detrick, MD, United States of America
| | | | - William E. Dennis
- US Army Center for Environmental Health Research, Fort Detrick, MD, United States of America
| | - Valerie C. Minarchick
- National Institute for Occupational Safety and Health, Morgantown, WV, United States of America
| | - Stephen S. Leonard
- National Institute for Occupational Safety and Health, Morgantown, WV, United States of America
| | - David A. Jackson
- US Army Center for Environmental Health Research, Fort Detrick, MD, United States of America
| | - Jonathan D. Stallings
- US Army Center for Environmental Health Research, Fort Detrick, MD, United States of America
| | - John A. Lewis
- US Army Center for Environmental Health Research, Fort Detrick, MD, United States of America
- * E-mail:
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Li D, Kang N, Ji J, Zhan Q. BRCA1 regulates transforming growth factor-β (TGF-β1) signaling through Gadd45a by enhancing the protein stability of Smad4. Mol Oncol 2015; 9:1655-66. [PMID: 26022109 DOI: 10.1016/j.molonc.2015.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 04/25/2015] [Accepted: 05/04/2015] [Indexed: 02/07/2023] Open
Abstract
BRCA1 is a well established tumor suppressor gene, which is involved in many cellular processes, including DNA damage repair, cell cycle control, apoptosis, as well as transcriptional control. In this work, we have found that BRCA1 is involved in regulating TGF-β1/Smad pathway. The loss of endogenous BRCA1 greatly attenuated TGF-β1-induced growth inhibition and cell cycle G1 arrest. BRCA1 greatly maintains stability of Smad4 protein, and the loss of BRCA1 results in Smad4 down-regulation, which is likely related to its downstream gene Gadd45a. Gadd45a is able to interact with β-Trcp1, a-F-box protein of SCF E3 ligase, and consequently suppresses the ubiquitin-degradation of Smad4 by SCF(β-trcp1), as reflected by the observations that the induction of Gadd45a substantially stabilizes Smad4 protein. In addition, exogenous expression of Gadd45a can largely rescue the protein level of Smad4 in BRCA1 deficient cells. These results further demonstrate that BRCA1 may act as an important negative regulator in cell cycle progression and tumorigenesis through regulating the stability of Smad4, and define a novel link that connects BRCA1 to TGF-β1/Smad pathway.
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Affiliation(s)
- Dan Li
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - Nan Kang
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - Junfang Ji
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - Qimin Zhan
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China.
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Platelet-activating factor induces cell cycle arrest and disrupts the DNA damage response in mast cells. Cell Death Dis 2015; 6:e1745. [PMID: 25950475 PMCID: PMC4669695 DOI: 10.1038/cddis.2015.115] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/16/2015] [Accepted: 03/17/2015] [Indexed: 12/17/2022]
Abstract
Platelet-activating factor (PAF) is a potent phospholipid modulator of inflammation that has diverse physiological and pathological functions. Previously, we demonstrated that PAF has an essential role in ultraviolet (UV)-induced immunosuppression and reduces the repair of damaged DNA, suggesting that UV-induced PAF is contributing to skin cancer initiation by inducing immune suppression and also affecting a proper DNA damage response. The exact role of PAF in modulating cell proliferation, differentiation or transformation is unclear. Here, we investigated the mechanism(s) by which PAF affects the cell cycle and impairs early DNA damage response. PAF arrests proliferation in transformed and nontransformed human mast cells by reducing the expression of cyclin-B1 and promoting the expression of p21. PAF-treated cells show a dose-dependent cell cycle arrest mainly at G2–M, and a decrease in the DNA damage response elements MCPH1/BRIT-1 and ataxia telangiectasia and rad related (ATR). In addition, PAF disrupts the localization of p-ataxia telangiectasia mutated (p-ATM), and phosphorylated-ataxia telangiectasia and rad related (p-ATR) at the site of DNA damage. Whereas the potent effect on cell cycle arrest may imply a tumor suppressor activity for PAF, the impairment of proper DNA damage response might implicate PAF as a tumor promoter. The outcome of these diverse effects may be dependent on specific cues in the microenvironment.
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Popp MW, Maquat LE. Attenuation of nonsense-mediated mRNA decay facilitates the response to chemotherapeutics. Nat Commun 2015; 6:6632. [PMID: 25808464 PMCID: PMC4375787 DOI: 10.1038/ncomms7632] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 02/13/2015] [Indexed: 12/27/2022] Open
Abstract
Nonsense-mediated mRNA decay (NMD) limits the production of aberrant mRNAs containing a premature termination codon and also controls the levels of endogenous transcripts. Here we show that when human cells are treated with clinically used chemotherapeutic compounds, NMD activity declines partly as a result of the proteolytic production of a dominant-interfering form of the key NMD factor UPF1. Production of cleaved UPF1 functions to upregulate genes involved in the response to apoptotic stresses. The biological consequence is the promotion of cell death. Combined exposure of cells to a small-molecule inhibitor of NMD, NMDI-1, and the chemotherapeutic doxorubicin leads to enhanced cell death, while inhibiting UPF1 cleavage protects cells from doxorubicin challenge. We propose a model to explain why the expression levels of genes producing mRNAs of diverse structure that encode proteins of diverse function are under the purview of NMD.
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Affiliation(s)
- Maximilian W Popp
- 1] Department of Biochemistry and Biophysics, School of Medicine and Dentistry, University of Rochester, Rochester, New York 14642, USA [2] Center for RNA Biology, University of Rochester, Rochester, New York 14642, USA
| | - Lynne E Maquat
- 1] Department of Biochemistry and Biophysics, School of Medicine and Dentistry, University of Rochester, Rochester, New York 14642, USA [2] Center for RNA Biology, University of Rochester, Rochester, New York 14642, USA
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Ni L, Zhu X, Gong C, Luo Y, Wang L, Zhou W, Zhu S, Li Y. Trichosanthes kirilowii fruits inhibit non-small cell lung cancer cell growth through mitotic cell-cycle arrest. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2015; 43:349-64. [PMID: 25779643 DOI: 10.1142/s0192415x15500238] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Lung cancer is the leading cause of cancer-related death worldwide. Non-small cell lung cancer (NSCLC) accounts for 80% of lung cancer cases and the reported overall 5-year survival rate is less than 5%. Natural medicines have attracted much attention due to their lower toxicity and fewer side effects. Trichosanthes kirilowii Maxim (TKM) fruits are commonly used in cancer treatment in combination with other Chinese medicinal herbs. However, little is known about their biological functions and mechanisms in NSCLC cells. In this study, we investigated the efficacy of TKM fruits in NSCLC cells using cell proliferation, invasion, migration, and anchorage independent assays and a Xenograft NSCLC tumor model, and explored the possible biological mechanism by flow cytometric analysis, cDNA microarray and real-time PCR. Results showed that TKM fruits significantly suppressed NSCLC cell proliferation, migration, invasion, tumorigenicity and tumor growth, and significantly extended the survival time of NSCLC-bearing mice. Flow cytometric analysis showed that TKM fruits significantly induced G2-M arrest, necrosis and apoptosis in NSCLC cells. cDNA microarray analysis revealed that TKM fruits regulated the differential expression of 544 genes, and the differential expression of selected genes was also confirmed. Gene ontology (GO) analysis showed that 18 of first 20 biological processes were involved in cell cycle and mitosis. These results indicate that TKM fruits have certain inhibitory effect on NSCLC cells through cell-cycle and mitosis arrest, and suggest that TKM fruits may be an important resource for developing new antitumor drugs, and a potent natural product for treating patients with NSCLC.
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Affiliation(s)
- Lulu Ni
- Department of Oncology, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai 200071, P. R. China , Laboratory of Integrative Medicine, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China
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Luna Vital DA, Loarca-Piña G, Dia VP, de Mejía EG. Peptides extracted from common bean (Phaseolus vulgaris L.) non-digestible fraction caused differential gene expression of HCT116 and RKO human colorectal cancer cells. Food Res Int 2014. [DOI: 10.1016/j.foodres.2014.02.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
The circadian clock is an endogenous timekeeper system that controls the daily rhythms of a variety of physiological processes. Accumulating evidence indicates that genetic changes or unhealthy lifestyle can lead to a disruption of circadian homeostasis, which is a risk factor for severe dysfunctions and pathologies including cancer. Cell cycle, proliferation, and cell death are closely intertwined with the circadian clock, and thus disruption of circadian rhythms appears to be linked to cancer development and progression. At the molecular level, the cell cycle machinery and the circadian clocks are controlled by similar mechanisms, including feedback loops of genes and protein products that display periodic activation and repression. Here, we review the circadian rhythmicity of genes associated with the cell cycle, proliferation, and apoptosis, and we highlight the potential connection between these processes, the circadian clock, and neoplastic transformations. Understanding these interconnections might have potential implications for the prevention and therapy of malignant diseases.
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Affiliation(s)
- Matúš Soták
- Institute of Physiology, Academy of Sciences of the Czech Republic , Prague , Czech Republic
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miR-16 and miR-26a target checkpoint kinases Wee1 and Chk1 in response to p53 activation by genotoxic stress. Cell Death Dis 2013; 4:e953. [PMID: 24336073 PMCID: PMC3877554 DOI: 10.1038/cddis.2013.483] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 10/31/2013] [Accepted: 11/04/2013] [Indexed: 01/07/2023]
Abstract
The tumour suppressor p53 is a crucial regulator of cell cycle arrest and apoptosis by acting as a transcription factor to regulate a variety of genes. At least in part, this control is exerted by p53 via regulating expression of numerous microRNAs. We identified two abundantly expressed microRNAs, miR-16 and miR-26a, whose expression is regulated by p53 during the checkpoint arrest induced by the genotoxic drug, doxorubicin. Importantly, among the targets of these miRs are two critical checkpoint kinases, Chk1 and Wee1. The p53-dependent augmentation of miR-16 and miR-26a expression levels led to the cell cycle arrest of tumour cells in G1/S and increased apoptosis. Strikingly, the bioinformatics analysis of survival times for patients with breast and prostate cancers has revealed that co-expression of mir-16 and miR-26a correlated with a better survival outcome. Collectively, our data provide a novel mechanism whereby p53 represses Chk1 and Wee1 expression, at least partially, via upregulation of miR-16 and miR-26a and thus sensitizes tumour cells to genotoxic therapies.
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Ma H, Rao L, Wang HL, Mao ZW, Lei RH, Yang ZY, Qing H, Deng YL. Transcriptome analysis of glioma cells for the dynamic response to γ-irradiation and dual regulation of apoptosis genes: a new insight into radiotherapy for glioblastomas. Cell Death Dis 2013; 4:e895. [PMID: 24176853 PMCID: PMC3920930 DOI: 10.1038/cddis.2013.412] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 08/09/2013] [Accepted: 09/06/2013] [Indexed: 11/11/2022]
Abstract
Ionizing radiation (IR) is of clinical importance for glioblastoma therapy; however, the recurrence of glioma characterized by radiation resistance remains a therapeutic challenge. Research on irradiation-induced transcription in glioblastomas can contribute to the understanding of radioresistance mechanisms. In this study, by using the total mRNA sequencing (RNA-seq) analysis, we assayed the global gene expression in a human glioma cell line U251 MG at various time points after exposure to a growth arrest dose of γ-rays. We identified 1656 genes with obvious changes at the transcriptional level in response to irradiation, and these genes were dynamically enriched in various biological processes or pathways, including cell cycle arrest, DNA replication, DNA repair and apoptosis. Interestingly, the results showed that cell death was not induced even many proapoptotic molecules, including death receptor 5 (DR5) and caspases were activated after radiation. The RNA-seq data analysis further revealed that both proapoptosis and antiapoptosis genes were affected by irradiation. Namely, most proapoptosis genes were early continually responsive, whereas antiapoptosis genes were responsive at later stages. Moreover, HMGB1, HMGB2 and TOP2A involved in the positive regulation of DNA fragmentation during apoptosis showed early continual downregulation due to irradiation. Furthermore, targeting of the TRAIL/DR5 pathway after irradiation led to significant apoptotic cell death, accompanied by the recovered gene expression of HMGB1, HMGB2 and TOP2A. Taken together, these results revealed that inactivation of proapoptotic signaling molecules in the nucleus and late activation of antiapoptotic genes may contribute to the radioresistance of gliomas. Overall, this study provided novel insights into not only the underlying mechanisms of radioresistance in glioblastomas but also the screening of multiple targets for radiotherapy.
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Affiliation(s)
- H Ma
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
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Naito Y, Yoshikawa T. Oxidative stress involvement and gene expression in indomethacin-induced gastropathy. Redox Rep 2013; 11:243-53. [PMID: 17207306 DOI: 10.1179/135100006x155021] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
It has been proposed that neutrophil- and oxygen radical-dependent microvascular injuries are important prime events that lead to gastric mucosal injury induced by indomethacin. Reactive oxygen species (ROS) produced by activated neutrophils after indomethacin treatment cause gastric mucosal injury via ROS-mediated oxidation of important biomolecules such as lipid, protein, and DNA. In addition, it has been revealed that indomethacin-induced gastric mucosal injury occurs via gastric epithelial cell apoptosis. However, there is little known about the mechanism of indomethacin-triggered cellular response and apoptotic signaling in gastric mucosal cells. In the present study, we summarize the evidence that supports the involvement of oxidative stress and apoptosis in indomethacin-induced gastropathy, and review the gene expression profiles of gastric epithelial cells after indomethacin treatment determined by DNA microarray analysis.
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Affiliation(s)
- Yuji Naito
- Department of Medical Proteomics, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Clear cell renal cell carcinoma associated microRNA expression signatures identified by an integrated bioinformatics analysis. J Transl Med 2013; 11:169. [PMID: 23841900 PMCID: PMC3740788 DOI: 10.1186/1479-5876-11-169] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 06/06/2013] [Indexed: 12/12/2022] Open
Abstract
Background Clear cell renal cell carcinoma (ccRCC) represents the most invasive and common adult kidney neoplasm. Mounting evidence suggests that microRNAs (miRNAs) are important regulators of gene expression. But their function in tumourigenesis in this tumour type remains elusive. With the development of high throughput technologies such as microarrays and NGS, aberrant miRNA expression has been widely observed in ccRCC. Systematic and integrative analysis of multiple microRNA expression datasets may reveal potential mechanisms by which microRNAs contribute to ccRCC pathogenesis. Methods We collected 5 public microRNA expression datasets in ccRCC versus non-matching normal renal tissues from GEO database and published literatures. We analyzed these data sets with an integrated bioinformatics framework to identify expression signatures. The framework incorporates a novel statistic method for abnormal gene expression detection and an in-house developed predictor to assess the regulatory activity of microRNAs. We then mapped target genes of DE-miRNAs to different databases, such as GO, KEGG, GeneGo etc, for functional enrichment analysis. Results Using this framework we identified a consistent panel of eleven deregulated miRNAs shared by five independent datasets that can distinguish normal kidney tissues from ccRCC. After comparison with 3 RNA-seq based microRNA profiling studies, we found that our data correlated well with the results of next generation sequencing. We also discovered 14 novel molecular pathways that are likely to play a role in the tumourigenesis of ccRCC. Conclusions The integrative framework described in this paper greatly improves the inter-dataset consistency of microRNA expression signatures. Consensus expression profile should be identified at pathway or network level to address the heterogeneity of cancer. The DE-miRNA signature and novel pathways identified herein could provide potential biomarkers for ccRCC that await further validation.
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Cyclopenta[c]phenanthrenes--chemistry and biological activity. Chem Biol Interact 2013; 204:58-65. [PMID: 23628509 DOI: 10.1016/j.cbi.2013.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2012] [Revised: 04/11/2013] [Accepted: 04/18/2013] [Indexed: 11/23/2022]
Abstract
Despite cyclopenta-fused polycyclic aromatic hydrocarbons (CP-PAHs) having been detected in the environment, the ability of these compounds to induce cellular and tissue responses remains poorly characterized. In this review, we look at the chemistry and biological activity of the cyclopenta[c]phenanthrenes (CP[c]Phs) as potential chemicals of concern in the process of risk assessment. The first part of the review deals with the environmental occurrence and chemistry of CP-PAHs, focusing on available methods of CP[c]Ph chemical synthesis. The most interesting structural feature of the CP[c]Ph is the presence of a pseudo fjord-region constructed by the cyclopentane ring. This compound can be treated either as a structurally similar one to B[c]Ph, or as a phenanthrene skeleton with an electrodonating alkyl substituent in the bay-region of the molecule. The second thread, providing available data on the adverse effects of CP[c]Ph compounds on cells and tissues of living organisms, mainly fish, improves our understanding of these possible environmental hazards. The data show that CP[c]Ph is less potent at inducing CYP1A gene expression in rainbow trout than benzo[a]pyrene (B[a]P), a well-known Ah-receptor agonist. Interestingly, the CP[c]Ph dependent up-regulation of CYP1A mRNA is positively correlated with the incidences of clastogenic changes in rainbow trout erythrocytes. CP[c]Ph has, comparably to B[a]P, a potential to repress expression of tumor suppressor p53, in the head kidney of rainbow trout. Furthermore, estrogen responsive genes in fish liver, ERα and VTG, are not induced by CP[c]Ph, suggesting that the compound has no endocrine disrupting potential. However, some CP[c]Phs show mutagenic activity when investigated in the Ames test, and exhibit genotoxic properties in in vitro micronucleus assay. The above characteristics suggest that CP-PAHs are chemicals of concern for which potential pathways of exposure should be further identified.
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Arsenijevic T, Vujovic A, Libert F, Op de Beeck A, Hébrant A, Janssens S, Grégoire F, Lefort A, Bolaky N, Perret J, Caspers L, Willermain F, Delporte C. Hyperosmotic stress induces cell cycle arrest in retinal pigmented epithelial cells. Cell Death Dis 2013; 4:e662. [PMID: 23744362 PMCID: PMC3702301 DOI: 10.1038/cddis.2013.189] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Osmotic changes occur in many tissues and profoundly influence cell function. Herein, we investigated the effect of hyperosmotic stress on retinal pigmented epithelial (RPE) cells using a microarray approach. Upon 4-h exposure to 100 mM NaCl or 200 mM sucrose, 79 genes were downregulated and 72 upregulated. Three gene ontology categories were significantly modulated: cell proliferation, transcription from RNA polymerase II promoter and response to abiotic stimulus. Fluorescent-activated cell sorting analysis further demonstrated that owing to hyperosmotic stimulation for 24 h, cell count and cell proliferation, as well as the percentage of cells in G0/G1 and S phases were significantly decreased, whereas the percentage of cells in G2/M phases increased, and apoptosis and necrosis remained unaffected. Accordingly, hyperosmotic conditions induced a decrease of cyclin B1 and D1 expression, and an activation of the p38 mitogen-activated protein kinase. In conclusion, our results demonstrate that hypertonic conditions profoundly affect RPE cell gene transcription regulating cell proliferation by downregulation cyclin D1 and cyclin B1 protein expression.
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Affiliation(s)
- T Arsenijevic
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium
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Patterson RA, Juarez MT, Hermann A, Sasik R, Hardiman G, McGinnis W. Serine proteolytic pathway activation reveals an expanded ensemble of wound response genes in Drosophila. PLoS One 2013; 8:e61773. [PMID: 23637905 PMCID: PMC3634835 DOI: 10.1371/journal.pone.0061773] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 03/13/2013] [Indexed: 01/01/2023] Open
Abstract
After injury to the animal epidermis, a variety of genes are transcriptionally activated in nearby cells to regenerate the missing cells and facilitate barrier repair. The range and types of diffusible wound signals that are produced by damaged epidermis and function to activate repair genes during epidermal regeneration remains a subject of very active study in many animals. In Drosophila embryos, we have discovered that serine protease function is locally activated around wound sites, and is also required for localized activation of epidermal repair genes. The serine protease trypsin is sufficient to induce a striking global epidermal wound response without inflicting cell death or compromising the integrity of the epithelial barrier. We developed a trypsin wounding treatment as an amplification tool to more fully understand the changes in the Drosophila transcriptome that occur after epidermal injury. By comparing our array results with similar results on mammalian skin wounding we can see which evolutionarily conserved pathways are activated after epidermal wounding in very diverse animals. Our innovative serine protease-mediated wounding protocol allowed us to identify 8 additional genes that are activated in epidermal cells in the immediate vicinity of puncture wounds, and the functions of many of these genes suggest novel genetic pathways that may control epidermal wound repair. Additionally, our data augments the evidence that clean puncture wounding can mount a powerful innate immune transcriptional response, with different innate immune genes being activated in an interesting variety of ways. These include puncture-induced activation only in epidermal cells in the immediate vicinity of wounds, or in all epidermal cells, or specifically in the fat body, or in multiple tissues.
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Affiliation(s)
- Rachel A. Patterson
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, California, United States of America
| | - Michelle T. Juarez
- Sophie Davis School of Biomedical Education, City College New York, New York, New York, United States of America
| | - Anita Hermann
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, California, United States of America
| | - Roman Sasik
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
| | - Gary Hardiman
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
| | - William McGinnis
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, California, United States of America
- * E-mail:
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