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Liu S, Shao F, Wang Y, Zhang Y, Yu H, Zhang N, He L, Kong Q, Jiang H, Dong Z. COX6C expression driven by copy amplification of 8q22.2 regulates cell proliferation via mediation of mitosis by ROS-AMPK signaling in lung adenocarcinoma. Cell Death Dis 2024; 15:74. [PMID: 38242874 PMCID: PMC10799076 DOI: 10.1038/s41419-024-06443-w] [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: 07/31/2023] [Revised: 01/03/2024] [Accepted: 01/05/2024] [Indexed: 01/21/2024]
Abstract
Copy number variations (CNVs) play a vital role in regulating genes expression and tumorigenesis. We explored the copy number alterations in early-stage lung adenocarcinoma using high-throughput sequencing and nucleic acid flight mass spectrometry technology, and found that 8q22.1-22.2 is frequently amplified in lung adenocarcinoma tissues. COX6C localizes on the region and its expression is notably enhanced that driven by amplification in lung adenocarcinoma. Knockdown of COX6C significantly inhibits the cell proliferation, and induces S-G2/M cell cycle arrest, mitosis deficiency and apoptosis. Moreover, COX6C depletion causes a deficiency in mitochondrial fusion, and impairment of oxidative phosphorylation. Mechanistically, COX6C-induced mitochondrial deficiency stimulates ROS accumulation and activates AMPK pathway, then leading to abnormality in spindle formation and chromosome segregation, activating spindle assemble checkpoint, causing mitotic arrest, and ultimately inducing cell apoptosis. Collectively, we suggested that copy amplification-mediated COX6C upregulation might serves as a prospective biomarker for prognosis and targeting therapy in patients with lung adenocarcinoma.
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Affiliation(s)
- Shuanghui Liu
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, P. R. China
- Laboratory Medicine Center, Department of Clinical Laboratory, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, P. R. China
| | - Fanggui Shao
- Department of Laboratory Medicine, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, P. R. China
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, P. R. China
| | - Yourong Wang
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, P. R. China
- Department of clinical laboratory, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 210000, P. R. China
| | - Yurui Zhang
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, P. R. China
| | - Hongjia Yu
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, P. R. China
| | - Ningxin Zhang
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, P. R. China
| | - Lan He
- School of Biomedical Science, Hunan University, Changsha, Hunan, 410013, P. R. China
| | - Qingran Kong
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, P. R. China.
| | - Hao Jiang
- Department of Biomedical Informatics, School of Life Sciences, Central South University, Changsha, Hunan, 410013, P. R. China.
| | - Zhixiong Dong
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, P. R. China.
- Department of Laboratory Medicine, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, P. R. China.
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2
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Huang J, Ji X. Never a dull enzyme, RNA polymerase II. Transcription 2023; 14:49-67. [PMID: 37132022 PMCID: PMC10353340 DOI: 10.1080/21541264.2023.2208023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/18/2023] [Accepted: 04/21/2023] [Indexed: 05/04/2023] Open
Abstract
RNA polymerase II (Pol II) is composed of 12 subunits that collaborate to synthesize mRNA within the nucleus. Pol II is widely recognized as a passive holoenzyme, with the molecular functions of its subunits largely ignored. Recent studies employing auxin-inducible degron (AID) and multi-omics techniques have revealed that the functional diversity of Pol II is achieved through the differential contributions of its subunits to various transcriptional and post-transcriptional processes. By regulating these processes in a coordinated manner through its subunits, Pol II can optimize its activity for diverse biological functions. Here, we review recent progress in understanding Pol II subunits and their dysregulation in diseases, Pol II heterogeneity, Pol II clusters and the regulatory roles of RNA polymerases.
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Affiliation(s)
- Jie Huang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Xiong Ji
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
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3
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Li Y, Huang J, Zhu J, Bao L, Wang H, Jiang Y, Tian K, Wang R, Zheng H, Duan W, Lai W, Yi X, Zhu Y, Guo T, Ji X. Targeted protein degradation reveals RNA Pol II heterogeneity and functional diversity. Mol Cell 2022; 82:3943-3959.e11. [PMID: 36113479 DOI: 10.1016/j.molcel.2022.08.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 07/14/2022] [Accepted: 08/18/2022] [Indexed: 10/14/2022]
Abstract
RNA polymerase II (RNA Pol II) subunits are thought to be involved in various transcription-associated processes, but it is unclear whether they play different regulatory roles in modulating gene expression. Here, we performed nascent and mature transcript sequencing after the acute degradation of 12 mammalian RNA Pol II subunits and profiled their genomic binding sites and protein interactomes to dissect their molecular functions. We found that RNA Pol II subunits contribute differently to RNA Pol II cellular localization and transcription processes and preferentially regulate RNA processing (such as RNA splicing and 3' end maturation). Genes sensitive to the depletion of different RNA Pol II subunits tend to be involved in diverse biological functions and show different RNA half-lives. Sequences, associated protein factors, and RNA structures are correlated with RNA Pol II subunit-mediated differential gene expression. These findings collectively suggest that the heterogeneity of RNA Pol II and different genes appear to depend on some of the subunits.
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Affiliation(s)
- Yuanjun Li
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Jie Huang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Junyi Zhu
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Lijun Bao
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Hui Wang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Yongpeng Jiang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Kai Tian
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Rui Wang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Haonan Zheng
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - WenJia Duan
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Weifeng Lai
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Xiao Yi
- Westlake Laboratory of Life Sciences and Biomedicine, Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China; Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Yi Zhu
- Westlake Laboratory of Life Sciences and Biomedicine, Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China; Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Tiannan Guo
- Westlake Laboratory of Life Sciences and Biomedicine, Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China; Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Xiong Ji
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China.
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4
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Osorio JC, Blanco R, Corvalán AH, Muñoz JP, Calaf GM, Aguayo F. Epstein-Barr Virus Infection in Lung Cancer: Insights and Perspectives. Pathogens 2022; 11:132. [PMID: 35215076 PMCID: PMC8878590 DOI: 10.3390/pathogens11020132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/17/2022] [Accepted: 01/17/2022] [Indexed: 11/30/2022] Open
Abstract
Lung cancer (LC) is the leading cause of cancer death worldwide. Tobacco smoke is the most frequent risk factor etiologically associated with LC, although exposures to other environmental factors such as arsenic, radon or asbestos are also involved. Additionally, the involvement of some viral infections such as high-risk human papillomaviruses (HR-HPVs), Merkel cell polyomavirus (MCPyV), Jaagsiekte Sheep Retrovirus (JSRV), John Cunningham Virus (JCV), and Epstein-Barr virus (EBV) has been suggested in LC, though an etiological relationship has not yet been established. EBV is a ubiquitous gamma herpesvirus causing persistent infections and some lymphoid and epithelial tumors. Since EBV is heterogeneously detected in LCs from different parts of the world, in this review we address the epidemiological and experimental evidence of a potential role of EBV. Considering this evidence, we propose mechanisms potentially involved in EBV-associated lung carcinogenesis. Additional studies are warranted to dissect the role of EBV in this very frequent malignancy.
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Affiliation(s)
- Julio C. Osorio
- Population Registry of Cali, Department of Pathology, Universidad del Valle, Cali 760042, Colombia;
| | - Rancés Blanco
- Laboratorio de Oncovirología, Programa de Virología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Santiago 8380000, Chile;
| | - Alejandro H. Corvalán
- Advanced Center for Chronic Diseases (ACCDiS), Pontificia Universidad Católica de Chile, Santiago 8320000, Chile;
| | - Juan P. Muñoz
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, Chile; (J.P.M.); (G.M.C.)
| | - Gloria M. Calaf
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, Chile; (J.P.M.); (G.M.C.)
- Center for Radiological Research, Columbia University Medical Center, New York, NY 10032, USA
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Emerging Molecular Dependencies of Mutant EGFR-Driven Non-Small Cell Lung Cancer. Cells 2021; 10:cells10123553. [PMID: 34944063 PMCID: PMC8699920 DOI: 10.3390/cells10123553] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/09/2021] [Accepted: 12/13/2021] [Indexed: 12/12/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) mutations are the molecular driver of a subset of non-small cell lung cancers (NSCLC); tumors that harbor these mutations are often dependent on sustained oncogene signaling for survival, a concept known as “oncogene addiction”. Inhibiting EGFR with tyrosine kinase inhibitors has improved clinical outcomes for patients; however, successive generations of inhibitors have failed to prevent the eventual emergence of resistance to targeted agents. Although these tumors have a well-established dependency on EGFR signaling, there remain questions about the underlying genetic mechanisms necessary for EGFR-driven oncogenesis and the factors that allow tumor cells to escape EGFR dependence. In this review, we highlight the latest findings on mutant EGFR dependencies, co-operative drivers, and molecular mechanisms that underlie sensitivity to EGFR inhibitors. Additionally, we offer perspective on how these discoveries may inform novel combination therapies tailored to EGFR mutant NSCLC.
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Human Mitoribosome Biogenesis and Its Emerging Links to Disease. Int J Mol Sci 2021; 22:ijms22083827. [PMID: 33917098 PMCID: PMC8067846 DOI: 10.3390/ijms22083827] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/23/2021] [Accepted: 03/24/2021] [Indexed: 12/20/2022] Open
Abstract
Mammalian mitochondrial ribosomes (mitoribosomes) synthesize a small subset of proteins, which are essential components of the oxidative phosphorylation machinery. Therefore, their function is of fundamental importance to cellular metabolism. The assembly of mitoribosomes is a complex process that progresses through numerous maturation and protein-binding events coordinated by the actions of several assembly factors. Dysregulation of mitoribosome production is increasingly recognized as a contributor to metabolic and neurodegenerative diseases. In recent years, mutations in multiple components of the mitoribosome assembly machinery have been associated with a range of human pathologies, highlighting their importance to cell function and health. Here, we provide a review of our current understanding of mitoribosome biogenesis, highlighting the key factors involved in this process and the growing number of mutations in genes encoding mitoribosomal RNAs, proteins, and assembly factors that lead to human disease.
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Analysis of Single Nucleotide Variants (SNVs) Induced by Exposure to PM 10 in Lung Epithelial Cells Using Whole Genome Sequencing. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18031046. [PMID: 33503946 PMCID: PMC7908261 DOI: 10.3390/ijerph18031046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 11/23/2022]
Abstract
There are many epidemiological studies asserting that fine dust causes lung cancer, but the biological mechanism is not clear. This study was conducted to investigate the effect of PM10 (particulate matter less than 10 μm) on single nucleotide variants through whole genome sequencing in lung epithelial cancer cell lines (HCC-827, NCI-H358) that have been exposed to PM10. The two cell lines were exposed to PM10 for 15 days. We performed experimental and next generation sequencing analyses on experimental group that had been exposed to PM10 as well as an unexposed control group. After exposure to PM10, 3005 single nucleotide variants were newly identified in the NCI-H358 group, and 4402 mutations were identified in the HCC-827 group. We analyzed these single nucleotide variants with the Mutalisk program. We observed kataegis in chromosome 1 in NCI-H358 and chromosome 7 in HCC-827. In mutational signatures analysis, the COSMIC mutational signature 5 was highest in both HCC-827 and NCI-H358 groups, and each cosine similarity was 0.964 in HCC-827 and 0.979 in the NCI-H358 group. The etiology of COSMIC mutational signature 5 is unknown at present. Well-designed studies are needed to determine whether environmental factors, such as PM10, cause COSMIC mutational signature 5.
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8
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Dimitrova DG, Teysset L, Carré C. RNA 2'-O-Methylation (Nm) Modification in Human Diseases. Genes (Basel) 2019; 10:E117. [PMID: 30764532 PMCID: PMC6409641 DOI: 10.3390/genes10020117] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/28/2019] [Accepted: 01/30/2019] [Indexed: 12/24/2022] Open
Abstract
Nm (2'-O-methylation) is one of the most common modifications in the RNA world. It has the potential to influence the RNA molecules in multiple ways, such as structure, stability, and interactions, and to play a role in various cellular processes from epigenetic gene regulation, through translation to self versus non-self recognition. Yet, building scientific knowledge on the Nm matter has been hampered for a long time by the challenges in detecting and mapping this modification. Today, with the latest advancements in the area, more and more Nm sites are discovered on RNAs (tRNA, rRNA, mRNA, and small non-coding RNA) and linked to normal or pathological conditions. This review aims to synthesize the Nm-associated human diseases known to date and to tackle potential indirect links to some other biological defects.
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Affiliation(s)
- Dilyana G Dimitrova
- Sorbonne Université, Institut de Biologie Paris Seine, Centre National de la Recherche Scientifique, Transgenerational Epigenetics & Small RNA Biology, Laboratoire de Biologie du Développement, 75005 Paris, France.
| | - Laure Teysset
- Sorbonne Université, Institut de Biologie Paris Seine, Centre National de la Recherche Scientifique, Transgenerational Epigenetics & Small RNA Biology, Laboratoire de Biologie du Développement, 75005 Paris, France.
| | - Clément Carré
- Sorbonne Université, Institut de Biologie Paris Seine, Centre National de la Recherche Scientifique, Transgenerational Epigenetics & Small RNA Biology, Laboratoire de Biologie du Développement, 75005 Paris, France.
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MiR-542-3p exerts tumor suppressive functions in non-small cell lung cancer cells by upregulating FTSJ2. Life Sci 2017; 188:87-95. [PMID: 28866101 DOI: 10.1016/j.lfs.2017.08.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 08/04/2017] [Accepted: 08/17/2017] [Indexed: 12/27/2022]
Abstract
AIMS Up-regulation or down-regulation of microRNAs (miRNAs) has been found in non-small cell lung cancer (NSCLC). However, the role and mechanism of regulation of miR-542-3p in NSCLC is still unclear. This study aimed at investigating the primary biological function of miR-542-3p and FTSJ2 in NSCLC tumorigenesis and the correlation of miR-542-3p and FTSJ2 in NSCLC. MAIN METHODS Our present results showed that miR-542-3p was down-regulated in NSCLC tissues and cancer cells. Overexpression of miR-542-3p inhibited cell proliferation, cell migration, cell cycle, EMT process and tumor growth in vitro, and induced cell apoptosis by MTT assay, colony formation assay, transwell migration assay, flow cytometry assay, RT-qPCR assay, western blot experiment and vivo model assay; miR-542-3p directly bound to the 3'UTR of FTSJ2 and upregulated FTSJ2 both mRNA and protein level by EGFP reporter assay, RT-qPCR and western blot analysis in NSCLC cells. FTSJ2 also reduced the aggressiveness of NSCLC cells. KEY FINDINGS In short, miR-542-3p functions as a suppressor gene by targeting and upregulating FTSJ2, thus inhibiting the malignancy of NSCLC cells. SIGNIFICANCE According to the results, miRNA-542-3p and its targeted FTSJ2 may be indispensable as a predictive biomarker of the response to the treatment in patients with NSCLC.
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Wang J, Zhang Y, Wan H, Dong N, Bao L, Sun X, Xu M, Wang X. Global analyses of subtype- or stage-specific genes on chromosome 7 in patients with lung cancer. Cancer Metastasis Rev 2016; 34:333-45. [PMID: 25951983 DOI: 10.1007/s10555-015-9568-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lung cancer is the most common cancer and becomes the leading cause of cancer mortality. Genetic and epigenetic alterations and variations are important to identify target genes in lung cancer and demonstrate the potential association of the chromosome 7 aberration with tumorigenesis. The present article integrated the independent and scattered global datasets to detect significant genes, co-expressed, type-special and stage-special genes in lung cancer with a special focus on chromosome 7 with bioinformatics analysis methods. About 60, 214, 26, or 49 up-regulated type-special genes, and 67, 35, 114, or 141 down-regulated type-special genes were identified in adenocarcinoma (ADC), squamous cell carcinoma (SCC), large cell carcinoma (LCC) or small-cell lung cancer (SCLC), respectively. About 5, 2, 8, or 1 stage-specific genes were up-regulated, while 23, 8, 2, or 90 stage-specific genes were down-regulated in ADC at stage I, II, III, or IV, respectively. Two stage-specific genes were significantly up-regulated in SCC at stage II, while 2 or 18 stage-specific genes in SCC at stage I or III were down-regulated, respectively. Lung cancer prognostic prediction rates of subtype- or stage-specific genes were further evaluated. The present study globally analyzed and identified subtype- or stage-specific target genes of lung cancer on chromosome 7 by combining 16 GSE datasets for the first time, although there are still needs to furthermore validate the clinical values of those identified genes in a large population of patients with lung cancer.
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Affiliation(s)
- Jian Wang
- Zhongshan Hospital, Fudan University Medical School, Shanghai Institute of Clinical Bioinformatics, Shanghai, China
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Farahmand S, Goliaei S, Ansari-Pour N, Razaghi-Moghadam Z. GTA: a game theoretic approach to identifying cancer subnetwork markers. MOLECULAR BIOSYSTEMS 2016; 12:818-25. [DOI: 10.1039/c5mb00684h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The identification of genetic markers (e.g. genes, pathways and subnetworks) for cancer has been one of the most challenging research areas in recent years.
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Affiliation(s)
- S. Farahmand
- Research Laboratory of Computational Biology
- Faculty of New Sciences and Technology
- University of Tehran
- Tehran
- Iran
| | - S. Goliaei
- Research Laboratory of Computational Biology
- Faculty of New Sciences and Technology
- University of Tehran
- Tehran
- Iran
| | - N. Ansari-Pour
- Faculty of New Sciences and Technology
- University of Tehran
- Tehran
- Iran
- School of Biological Sciences
| | - Z. Razaghi-Moghadam
- Faculty of New Sciences and Technology
- University of Tehran
- Tehran
- Iran
- School of Biological Sciences
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12
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Wei Y, Vellanki RN, Coyaud É, Ignatchenko V, Li L, Krieger JR, Taylor P, Tong J, Pham NA, Liu G, Raught B, Wouters BG, Kislinger T, Tsao MS, Moran MF. CHCHD2 Is Coamplified with EGFR in NSCLC and Regulates Mitochondrial Function and Cell Migration. Mol Cancer Res 2015; 13:1119-29. [DOI: 10.1158/1541-7786.mcr-14-0165-t] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 03/07/2015] [Indexed: 11/16/2022]
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13
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Ávila-Moreno F, Armas-López L, Álvarez-Moran AM, López-Bujanda Z, Ortiz-Quintero B, Hidalgo-Miranda A, Urrea-Ramírez F, Rivera-Rosales RM, Vázquez-Manríquez E, Peña-Mirabal E, Morales-Gómez J, Vázquez-Minero JC, Téllez-Becerra JL, Ramírez-Mendoza R, Ávalos-Bracho A, de Alba EG, Vázquez-Santillán K, Maldonado-Lagunas V, Santillán-Doherty P, Piña-Sánchez P, Zúñiga-Ramos J. Overexpression of MEOX2 and TWIST1 is associated with H3K27me3 levels and determines lung cancer chemoresistance and prognosis. PLoS One 2014; 9:e114104. [PMID: 25460568 PMCID: PMC4252097 DOI: 10.1371/journal.pone.0114104] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 10/29/2014] [Indexed: 12/26/2022] Open
Abstract
Lung cancer is the leading cause of death from malignant diseases worldwide, with the non-small cell (NSCLC) subtype accounting for the majority of cases. NSCLC is characterized by frequent genomic imbalances and copy number variations (CNVs), but the epigenetic aberrations that are associated with clinical prognosis and therapeutic failure remain not completely identify. In the present study, a total of 55 lung cancer patients were included and we conducted genomic and genetic expression analyses, immunohistochemical protein detection, DNA methylation and chromatin immunoprecipitation assays to obtain genetic and epigenetic profiles associated to prognosis and chemoresponse of NSCLC patients. Finally, siRNA transfection-mediated genetic silencing and cisplatinum cellular cytotoxicity assays in NSCLC cell lines A-427 and INER-37 were assessed to describe chemoresistance mechanisms involved. Our results identified high frequencies of CNVs (66–51% of cases) in the 7p22.3–p21.1 and 7p15.3–p15.2 cytogenetic regions. However, overexpression of genes, such as MEOX2, HDAC9, TWIST1 and AhR, at 7p21.2–p21.1 locus occurred despite the absence of CNVs and little changes in DNA methylation. In contrast, the promoter sequences of MEOX2 and TWIST1 displayed significantly lower/decrease in the repressive histone mark H3K27me3 and increased in the active histone mark H3K4me3 levels. Finally these results correlate with poor survival in NSCLC patients and cellular chemoresistance to oncologic drugs in NSCLC cell lines in a MEOX2 and TWIST1 overexpression dependent-manner. In conclusion, we report for the first time that MEOX2 participates in chemoresistance irrespective of high CNV, but it is significantly dependent upon H3K27me3 enrichment probably associated with aggressiveness and chemotherapy failure in NSCLC patients, however additional clinical studies must be performed to confirm our findings as new probable clinical markers in NSCLC patients.
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Affiliation(s)
- Federico Ávila-Moreno
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores (FES)-Iztacala, Biomedicine Research Unit (UBIMED), Cancer Epigenomics Laboratory 12, Tlalnepantla, Mexico State, Mexico; Instituto Nacional de Enfermedades Respiratorias (INER), Mexico City, Mexico
| | - Leonel Armas-López
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores (FES)-Iztacala, Biomedicine Research Unit (UBIMED), Cancer Epigenomics Laboratory 12, Tlalnepantla, Mexico State, Mexico
| | | | - Zoila López-Bujanda
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores (FES)-Iztacala, Biomedicine Research Unit (UBIMED), Cancer Epigenomics Laboratory 12, Tlalnepantla, Mexico State, Mexico; Instituto Nacional de Enfermedades Respiratorias (INER), Mexico City, Mexico; Johns Hopkins University, Medical Institutions, Maryland, Baltimore, United States of America
| | | | | | | | | | | | - Erika Peña-Mirabal
- Instituto Nacional de Enfermedades Respiratorias (INER), Mexico City, Mexico
| | - José Morales-Gómez
- Instituto Nacional de Enfermedades Respiratorias (INER), Mexico City, Mexico
| | | | | | - Roberto Ramírez-Mendoza
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores (FES)-Iztacala, Biomedicine Research Unit (UBIMED), Cancer Epigenomics Laboratory 12, Tlalnepantla, Mexico State, Mexico
| | | | | | | | | | | | - Patricia Piña-Sánchez
- Unidad de Investigación Médica en Enfermedades Oncológicas (UIMEO), Instituto Mexicano del Seguro Social (IMSS), Centro Médico Nacional (CMN), Siglo XXI, México City, México
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Yao F, Liu H, Li Z, Zhong C, Fang W. Down-regulation of LATS2 in non-small cell lung cancer promoted the growth and motility of cancer cells. Tumour Biol 2014; 36:2049-57. [DOI: 10.1007/s13277-014-2812-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 11/04/2014] [Indexed: 12/25/2022] Open
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15
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Kamtchueng C, Stébenne MÉ, Delannoy A, Wilhelm E, Léger H, Benecke AG, Bell B. Alternative splicing of TAF6: downstream transcriptome impacts and upstream RNA splice control elements. PLoS One 2014; 9:e102399. [PMID: 25025302 PMCID: PMC4099370 DOI: 10.1371/journal.pone.0102399] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 06/19/2014] [Indexed: 01/07/2023] Open
Abstract
The TAF6δ pathway of apoptosis can dictate life versus death decisions independently of the status of p53 tumor suppressor. TAF6δ is an inducible pro-apoptotic subunit of the general RNA polymerase II (Pol II) transcription factor TFIID. Alternative splice site choice of TAF6δ has been shown to be a pivotal event in triggering death via the TAF6δ pathway, yet nothing is currently known about the mechanisms that promote TAF6δ splicing. Furthermore the transcriptome impact of the gain of function of TAF6δ versus the loss of function of the major TAF6α splice form remains undefined. Here we employ comparative microarray analysis to show that TAF6δ drives a transcriptome profile distinct from that resulting from depletion of TAF6α. To define the cis-acting RNA elements responsible for TAF6δ alternative splicing we performed a mutational analysis of a TAF6 minigene system. The data point to several new RNA elements that can modulate TAF6δ and also reveal a role for RNA secondary structure in the selection of TAF6δ.
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Affiliation(s)
- Catherine Kamtchueng
- RNA Group, Département de microbiologie et d'infectiologie, Faculté de médecine et sciences de la santé, Université de Sherbrooke, and Centre de recherche du CHUS, Pavillon de recherche appliquée sur le cancer, 3201 rue Jean-Migneault, Sherbrooke, Québec, Canada
| | - Marie-Éve Stébenne
- RNA Group, Département de microbiologie et d'infectiologie, Faculté de médecine et sciences de la santé, Université de Sherbrooke, and Centre de recherche du CHUS, Pavillon de recherche appliquée sur le cancer, 3201 rue Jean-Migneault, Sherbrooke, Québec, Canada
| | - Aurélie Delannoy
- RNA Group, Département de microbiologie et d'infectiologie, Faculté de médecine et sciences de la santé, Université de Sherbrooke, and Centre de recherche du CHUS, Pavillon de recherche appliquée sur le cancer, 3201 rue Jean-Migneault, Sherbrooke, Québec, Canada
| | - Emmanuelle Wilhelm
- RNA Group, Département de microbiologie et d'infectiologie, Faculté de médecine et sciences de la santé, Université de Sherbrooke, and Centre de recherche du CHUS, Pavillon de recherche appliquée sur le cancer, 3201 rue Jean-Migneault, Sherbrooke, Québec, Canada
| | - Hélène Léger
- Institut des Hautes Etudes Scientifiques, Centre National de la Recherche Scientifique, 35 route de Chartres, Bures sur Yvette, France
| | - Arndt G. Benecke
- Institut des Hautes Etudes Scientifiques, Centre National de la Recherche Scientifique, 35 route de Chartres, Bures sur Yvette, France
- Université Pierre et Marie Curie, UMR8246 CNRS, 7 quai Saint Bernard, Paris, France
| | - Brendan Bell
- RNA Group, Département de microbiologie et d'infectiologie, Faculté de médecine et sciences de la santé, Université de Sherbrooke, and Centre de recherche du CHUS, Pavillon de recherche appliquée sur le cancer, 3201 rue Jean-Migneault, Sherbrooke, Québec, Canada
- * E-mail:
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16
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Lai CW, Chen HL, Lin KY, Liu FC, Chong KY, Cheng WTK, Chen CM. FTSJ2, a heat shock-inducible mitochondrial protein, suppresses cell invasion and migration. PLoS One 2014; 9:e90818. [PMID: 24595062 PMCID: PMC3942483 DOI: 10.1371/journal.pone.0090818] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 02/05/2014] [Indexed: 01/04/2023] Open
Abstract
Ribosomal RNA large subunit methyltransferase J (RrmJ), an Escherichia coli heat shock protein, is responsible for 2′-O-ribose methylation in 23S rRNA. In mammals, three close homologs of RrmJ have been identified and have been designated as FTSJ1, FTSJ2 and FTSJ3; however, little is known about these genes. In this study, we characterized the mammalian FTSJ2, which was the most related protein to RrmJ in a phylogenetic analysis that had similar amino acid sequence features and tertiary protein structures of RrmJ. FTSJ2 was first identified in this study as a nucleus encoded mitochondrial protein that preserves the heat shock protein character in mammals in which the mRNA expressions was increased in porcine lung tissues and A549 cells after heat shock treatment. In addition, a recent study in non-small cell lung cancer (NSCLC) suggested that the FTSJ2 gene is located in a novel oncogenic locus. However, our results demonstrate that the expression of FTSJ2 mRNA was decreased in the more invasive subline (CL1-5) of the lung adenocarcinoma cells (CL1) compared with the less invasive subline (CL1-0), and overexpression of FTSJ2 resulted in the inhibition of cell invasion and migration in the rhabdomyosarcoma cell (TE671). In conclusion, our findings indicate that mammalian FTSJ2 is a mitochondrial ortholog of E. coli RrmJ and conserves the heat shock protein properties. Moreover, FTSJ2 possesses suppressive effects on the invasion and migration of cancer cells.
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Affiliation(s)
- Cheng-Wei Lai
- Department of Life Sciences, Agricultural Biotechnology Center, iEGG center, National Chung Hsing University, Taichung, Taiwan
| | - Hsiao-Ling Chen
- Department of Bioresources, Da-Yeh University, Changhwa, Taiwan
| | - Ken-Yo Lin
- Department of Life Sciences, Agricultural Biotechnology Center, iEGG center, National Chung Hsing University, Taichung, Taiwan
| | - Fang-Chueh Liu
- Department of Life Sciences, Agricultural Biotechnology Center, iEGG center, National Chung Hsing University, Taichung, Taiwan
- Department of Animal Nutrition, Livestock Research Institute, Council of Agriculture, Tainan, Taiwan
| | - Kowit-Yu Chong
- Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Tao-Yuan, Taiwan
| | - Winston T. K. Cheng
- Department of Animal Science and Biotechnology, Tunghai University, Taichung, Taiwan
| | - Chuan-Mu Chen
- Department of Life Sciences, Agricultural Biotechnology Center, iEGG center, National Chung Hsing University, Taichung, Taiwan
- * E-mail:
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17
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Ronchi CL, Sbiera S, Leich E, Henzel K, Rosenwald A, Allolio B, Fassnacht M. Single nucleotide polymorphism array profiling of adrenocortical tumors--evidence for an adenoma carcinoma sequence? PLoS One 2013; 8:e73959. [PMID: 24066089 PMCID: PMC3774745 DOI: 10.1371/journal.pone.0073959] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 07/25/2013] [Indexed: 12/20/2022] Open
Abstract
Adrenocortical tumors consist of benign adenomas and highly malignant carcinomas with a still incompletely understood pathogenesis. A total of 46 adrenocortical tumors (24 adenomas and 22 carcinomas) were investigated aiming to identify novel genes involved in adrenocortical tumorigenesis. High-resolution single nucleotide polymorphism arrays (Affymetrix) were used to detect copy number alterations (CNAs) and copy neutral losses of heterozygosity (cnLOH). Genomic clustering showed good separation between adenomas and carcinomas, with best partition including only chromosome 5, which was highly amplified in 17/22 malignant tumors. The malignant tumors had more relevant genomic aberrations than benign tumors, such as a higher median number of recurrent CNA (2631 vs 94), CNAs >100 Kb (62.5 vs 7) and CN losses (72.5 vs 5.5), and a higher percentage of samples with cnLOH (91% vs 29%). Within the carcinoma cohort, a precise genetic pattern (i.e. large gains at chr 5, 7, 12, and 19, and losses at chr 1, 2, 13, 17, and 22) was associated with a better prognosis (overall survival: 72.2 vs 35.4 months, P=0.063). Interestingly, >70% of gains frequent in beningn were also present in malignant tumors. Notch signaling was the most frequently involved pathway in both tumor entities. Finally, a CN gain at imprinted “IGF2” locus chr 11p15.5 appeared to be an early alteration in a multi-step tumor progression, followed by the loss of one or two alleles, associated with increased IGF2 expression, only in carcinomas. Our study serves as database for the identification of genes and pathways, such as Notch signaling, which could be involved in the pathogenesis of adrenocortical tumors. Using these data, we postulate an adenoma-carcinoma sequence for these tumors.
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Affiliation(s)
- Cristina L. Ronchi
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Würzburg, Wuerzburg, Germany
- * E-mail:
| | - Silviu Sbiera
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Würzburg, Wuerzburg, Germany
- Department of Internal Medicine IV, University Hospital, Ludwig-Maximilian-University Munich, Munich, Germany
| | - Ellen Leich
- Institute of Pathology, University of Würzburg, Wuerzburg, Germany
| | - Katharina Henzel
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Würzburg, Wuerzburg, Germany
| | | | - Bruno Allolio
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Würzburg, Wuerzburg, Germany
| | - Martin Fassnacht
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Würzburg, Wuerzburg, Germany
- Department of Internal Medicine IV, University Hospital, Ludwig-Maximilian-University Munich, Munich, Germany
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18
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Gong M, Ma J, Guillemette R, Zhou M, Yang Y, Yang Y, Hock JM, Yu X. miR-335 inhibits small cell lung cancer bone metastases via IGF-IR and RANKL pathways. Mol Cancer Res 2013; 12:101-10. [PMID: 23966614 DOI: 10.1158/1541-7786.mcr-13-0136] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
UNLABELLED Small cell lung cancer (SCLC) is a rapidly progressing, incurable cancer that frequently spreads to bone. New insights are needed to identify therapeutic targets to prevent or retard SCLC metastatic progression. Human SCLC SBC-5 cells in mouse xenograft models home to skeletal and nonskeletal sites, whereas human SCLC SBC-3 cells only pervade nonskeletal sites. Because microRNAs (miRNA) often act as tumor regulators, we investigated their role in preclinical models of SCLC. miRNA expression profiling revealed selective and reduced expression of miRNA (miR)-335 and miR-29a in SBC-5 cells, compared with SBC-3 cells. In SBC-5 cells, miR-335 expression correlated with bone osteolytic lesions, whereas miR-29a expression did not. Overexpression of miR-335 in SBC-5 cells significantly reduced cell migration, invasion, proliferation, colony formation, and osteoclast induction in vitro. Importantly, in miR-335 overexpressing SBC-5 cell xenografts (n = 10), there were minimal osteolytic lesions in the majority of mice and none in three mice. Expression of RANK ligand (RANKL) and insulin-like growth factor-I receptor (IGF-IR), key mediators of bone metastases, were elevated in SBC-5 as compared with SBC-3 cells. Mechanistically, overexpression of miR-335 in SBC-5 cells reduced RANKL and IGF-IR expression. In conclusion, loss of miR-335 promoted SCLC metastatic skeletal lesions via deregulation of IGF-IR and RANKL pathways and was associated with metastatic osteolytic skeletal lesions. IMPLICATIONS These preclinical findings establish a need to pursue the role of miR-335 in human SCLC with metastatic skeletal disease.
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Affiliation(s)
- Meng Gong
- MD, PhD, Laboratory of Endocrinology and Metabolism, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, No. 37 Guoxue Xiang, Chengdu, Sichuan 610041, People's Republic of China.
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19
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Akatsuka S, Yamashita Y, Ohara H, Liu YT, Izumiya M, Abe K, Ochiai M, Jiang L, Nagai H, Okazaki Y, Murakami H, Sekido Y, Arai E, Kanai Y, Hino O, Takahashi T, Nakagama H, Toyokuni S. Fenton reaction induced cancer in wild type rats recapitulates genomic alterations observed in human cancer. PLoS One 2012; 7:e43403. [PMID: 22952676 PMCID: PMC3430702 DOI: 10.1371/journal.pone.0043403] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 07/19/2012] [Indexed: 11/19/2022] Open
Abstract
Iron overload has been associated with carcinogenesis in humans. Intraperitoneal administration of ferric nitrilotriacetate initiates a Fenton reaction in renal proximal tubules of rodents that ultimately leads to a high incidence of renal cell carcinoma (RCC) after repeated treatments. We performed high-resolution microarray comparative genomic hybridization to identify characteristics in the genomic profiles of this oxidative stress-induced rat RCCs. The results revealed extensive large-scale genomic alterations with a preference for deletions. Deletions and amplifications were numerous and sometimes fragmented, demonstrating that a Fenton reaction is a cause of such genomic alterations in vivo. Frequency plotting indicated that two of the most commonly altered loci corresponded to a Cdkn2a/2b deletion and a Met amplification. Tumor sizes were proportionally associated with Met expression and/or amplification, and clustering analysis confirmed our results. Furthermore, we developed a procedure to compare whole genomic patterns of the copy number alterations among different species based on chromosomal syntenic relationship. Patterns of the rat RCCs showed the strongest similarity to the human RCCs among five types of human cancers, followed by human malignant mesothelioma, an iron overload-associated cancer. Therefore, an iron-dependent Fenton chemical reaction causes large-scale genomic alterations during carcinogenesis, which may result in distinct genomic profiles. Based on the characteristics of extensive genome alterations in human cancer, our results suggest that this chemical reaction may play a major role during human carcinogenesis.
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Affiliation(s)
- Shinya Akatsuka
- Departments of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Yoriko Yamashita
- Departments of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Hiroki Ohara
- Departments of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Yu-Ting Liu
- Department of Pathology and Biology of Diseases, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto, Japan
| | - Masashi Izumiya
- Division of Cancer Development System, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
| | - Koichiro Abe
- Division of Cancer Development System, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
- Department of Internal Medicine, Teikyo University School of Medicine, Itabashi-ku, Tokyo, Japan
| | - Masako Ochiai
- Division of Cancer Development System, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
| | - Li Jiang
- Departments of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Hirotaka Nagai
- Departments of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
- Department of Pathology and Biology of Diseases, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto, Japan
| | - Yasumasa Okazaki
- Departments of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Hideki Murakami
- Division of Molecular Oncology, Aichi Cancer Center Research Institute, Chikusa-Ku, Nagoya, Japan
| | - Yoshitaka Sekido
- Division of Molecular Oncology, Aichi Cancer Center Research Institute, Chikusa-Ku, Nagoya, Japan
| | - Eri Arai
- Division of Molecular Pathology, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
| | - Yae Kanai
- Division of Molecular Pathology, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
| | - Okio Hino
- Department of Pathology and Oncology, Juntendo University School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Takashi Takahashi
- Molecular Carcinogenesis, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Hitoshi Nakagama
- Division of Cancer Development System, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
| | - Shinya Toyokuni
- Departments of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
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20
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Thu KL, Vucic EA, Chari R, Zhang W, Lockwood WW, English JC, Fu R, Wang P, Feng Z, MacAulay CE, Gazdar AF, Lam S, Lam WL. Lung adenocarcinoma of never smokers and smokers harbor differential regions of genetic alteration and exhibit different levels of genomic instability. PLoS One 2012; 7:e33003. [PMID: 22412972 PMCID: PMC3296775 DOI: 10.1371/journal.pone.0033003] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Accepted: 02/02/2012] [Indexed: 11/23/2022] Open
Abstract
Recent evidence suggests that the observed clinical distinctions between lung tumors in smokers and never smokers (NS) extend beyond specific gene mutations, such as EGFR, EML4-ALK, and KRAS, some of which have been translated into targeted therapies. However, the molecular alterations identified thus far cannot explain all of the clinical and biological disparities observed in lung tumors of NS and smokers. To this end, we performed an unbiased genome-wide, comparative study to identify novel genomic aberrations that differ between smokers and NS. High resolution whole genome DNA copy number profiling of 69 lung adenocarcinomas from smokers (n = 39) and NS (n = 30) revealed both global and regional disparities in the tumor genomes of these two groups. We found that NS lung tumors had a greater proportion of their genomes altered than those of smokers. Moreover, copy number gains on chromosomes 5q, 7p, and 16p occurred more frequently in NS. We validated our findings in two independently generated public datasets. Our findings provide a novel line of evidence distinguishing genetic differences between smoker and NS lung tumors, namely, that the extent of segmental genomic alterations is greater in NS tumors. Collectively, our findings provide evidence that these lung tumors are globally and genetically different, which implies they are likely driven by distinct molecular mechanisms.
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Affiliation(s)
- Kelsie L Thu
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada.
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21
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Starczynowski DT, Lockwood WW, Deléhouzée S, Chari R, Wegrzyn J, Fuller M, Tsao MS, Lam S, Gazdar AF, Lam WL, Karsan A. TRAF6 is an amplified oncogene bridging the RAS and NF-κB pathways in human lung cancer. J Clin Invest 2011; 121:4095-105. [PMID: 21911935 DOI: 10.1172/jci58818] [Citation(s) in RCA: 135] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Accepted: 07/06/2011] [Indexed: 11/17/2022] Open
Abstract
Somatic mutations and copy number alterations (as a result of deletion or amplification of large portions of a chromosome) are major drivers of human lung cancers. Detailed analysis of lung cancer-associated chromosomal amplifications could identify novel oncogenes. By performing an integrative cytogenetic and gene expression analysis of non-small-cell lung cancer (NSCLC) and small-cell lung cancer (SCLC) cell lines and tumors, we report here the identification of a frequently recurring amplification at chromosome 11 band p13. Within this region, only TNF receptor-associated factor 6 (TRAF6) exhibited concomitant mRNA overexpression and gene amplification in lung cancers. Inhibition of TRAF6 in human lung cancer cell lines suppressed NF-κB activation, anchorage-independent growth, and tumor formation. In these lung cancer cell lines, RAS required TRAF6 for its oncogenic capabilities. Furthermore, TRAF6 overexpression in NIH3T3 cells resulted in NF-κB activation, anchorage-independent growth, and tumor formation. Our findings show that TRAF6 is an oncogene that is important for RAS-mediated oncogenesis and provide a mechanistic explanation for the previously apparent importance of constitutive NF-κB activation in RAS-driven lung cancers.
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22
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Serão NVL, Delfino KR, Southey BR, Beever JE, Rodriguez-Zas SL. Cell cycle and aging, morphogenesis, and response to stimuli genes are individualized biomarkers of glioblastoma progression and survival. BMC Med Genomics 2011; 4:49. [PMID: 21649900 PMCID: PMC3127972 DOI: 10.1186/1755-8794-4-49] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Accepted: 06/07/2011] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Glioblastoma is a complex multifactorial disorder that has swift and devastating consequences. Few genes have been consistently identified as prognostic biomarkers of glioblastoma survival. The goal of this study was to identify general and clinical-dependent biomarker genes and biological processes of three complementary events: lifetime, overall and progression-free glioblastoma survival. METHODS A novel analytical strategy was developed to identify general associations between the biomarkers and glioblastoma, and associations that depend on cohort groups, such as race, gender, and therapy. Gene network inference, cross-validation and functional analyses further supported the identified biomarkers. RESULTS A total of 61, 47 and 60 gene expression profiles were significantly associated with lifetime, overall, and progression-free survival, respectively. The vast majority of these genes have been previously reported to be associated with glioblastoma (35, 24, and 35 genes, respectively) or with other cancers (10, 19, and 15 genes, respectively) and the rest (16, 4, and 10 genes, respectively) are novel associations. Pik3r1, E2f3, Akr1c3, Csf1, Jag2, Plcg1, Rpl37a, Sod2, Topors, Hras, Mdm2, Camk2g, Fstl1, Il13ra1, Mtap and Tp53 were associated with multiple survival events.Most genes (from 90 to 96%) were associated with survival in a general or cohort-independent manner and thus the same trend is observed across all clinical levels studied. The most extreme associations between profiles and survival were observed for Syne1, Pdcd4, Ighg1, Tgfa, Pla2g7, and Paics. Several genes were found to have a cohort-dependent association with survival and these associations are the basis for individualized prognostic and gene-based therapies. C2, Egfr, Prkcb, Igf2bp3, and Gdf10 had gender-dependent associations; Sox10, Rps20, Rab31, and Vav3 had race-dependent associations; Chi3l1, Prkcb, Polr2d, and Apool had therapy-dependent associations. Biological processes associated glioblastoma survival included morphogenesis, cell cycle, aging, response to stimuli, and programmed cell death. CONCLUSIONS Known biomarkers of glioblastoma survival were confirmed, and new general and clinical-dependent gene profiles were uncovered. The comparison of biomarkers across glioblastoma phases and functional analyses offered insights into the role of genes. These findings support the development of more accurate and personalized prognostic tools and gene-based therapies that improve the survival and quality of life of individuals afflicted by glioblastoma multiforme.
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Affiliation(s)
- Nicola VL Serão
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Kristin R Delfino
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Bruce R Southey
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Jonathan E Beever
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Sandra L Rodriguez-Zas
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Statistics, University of Illinois at Urbana-Champaign, Champaign, Illinois, USA
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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23
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TAF6delta orchestrates an apoptotic transcriptome profile and interacts functionally with p53. BMC Mol Biol 2010; 11:10. [PMID: 20096117 PMCID: PMC2827470 DOI: 10.1186/1471-2199-11-10] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Accepted: 01/22/2010] [Indexed: 01/30/2023] Open
Abstract
Background TFIID is a multiprotein complex that plays a pivotal role in the regulation of RNA polymerase II (Pol II) transcription owing to its core promoter recognition and co-activator functions. TAF6 is a core TFIID subunit whose splice variants include the major TAF6α isoform that is ubiquitously expressed, and the inducible TAF6δ. In contrast to TAF6α, TAF6δ is a pro-apoptotic isoform with a 10 amino acid deletion in its histone fold domain that abolishes its interaction with TAF9. TAF6δ expression can dictate life versus death decisions of human cells. Results Here we define the impact of endogenous TAF6δ expression on the global transcriptome landscape. TAF6δ was found to orchestrate a transcription profile that included statistically significant enrichment of genes of apoptotic function. Interestingly, gene expression patterns controlled by TAF6δ share similarities with, but are not equivalent to, those reported to change following TAF9 and/or TAF9b depletion. Finally, because TAF6δ regulates certain p53 target genes, we tested and demonstrated a physical and functional interaction between TAF6δ and p53. Conclusion Together our data define a TAF6δ-driven apoptotic gene expression program and show crosstalk between the p53 and TAF6δ pathways.
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