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Zhang W, Wang J, Shan C. The eEF1A protein in cancer: Clinical significance, oncogenic mechanisms, and targeted therapeutic strategies. Pharmacol Res 2024; 204:107195. [PMID: 38677532 DOI: 10.1016/j.phrs.2024.107195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/09/2024] [Accepted: 04/22/2024] [Indexed: 04/29/2024]
Abstract
Eukaryotic elongation factor 1A (eEF1A) is among the most abundant proteins in eukaryotic cells. Evolutionarily conserved across species, eEF1A is in charge of translation elongation for protein biosynthesis as well as a plethora of non-translational moonlighting functions for cellular homeostasis. In malignant cells, however, eEF1A becomes a pleiotropic driver of cancer progression via a broad diversity of pathways, which are not limited to hyperactive translational output. In the past decades, mounting studies have demonstrated the causal link between eEF1A and carcinogenesis, gaining deeper insights into its multifaceted mechanisms and corroborating its value as a prognostic marker in various cancers. On the other hand, an increasing number of natural and synthetic compounds were discovered as anticancer eEF1A-targeting inhibitors. Among them, plitidepsin was approved for the treatment of multiple myeloma whereas metarrestin was currently under clinical development. Despite significant achievements in these two interrelated fields, hitherto there lacks a systematic examination of the eEF1A protein in the context of cancer research. Therefore, the present work aims to delineate its clinical implications, molecular oncogenic mechanisms, and targeted therapeutic strategies as reflected in the ever expanding body of literature, so as to deepen mechanistic understanding of eEF1A-involved tumorigenesis and inspire the development of eEF1A-targeted chemotherapeutics and biologics.
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Affiliation(s)
- Weicheng Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, People's Republic of China.
| | - Jiyan Wang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, People's Republic of China
| | - Changliang Shan
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, People's Republic of China.
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2
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Treekitkarnmongkol W, Solis LM, Sankaran D, Gagea M, Singh PK, Mistry R, Nguyen T, Kai K, Liu J, Sasai K, Jitsumori Y, Liu J, Nagao N, Stossi F, Mancini MA, Wistuba II, Thompson AM, Lee JM, Cadiñanos J, Wong KK, Abbott CM, Sahin AA, Liu S, Katayama H, Sen S. eEF1A2 promotes PTEN-GSK3β-SCF complex-dependent degradation of Aurora kinase A and is inactivated in breast cancer. Sci Signal 2024; 17:eadh4475. [PMID: 38442201 DOI: 10.1126/scisignal.adh4475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 02/15/2024] [Indexed: 03/07/2024]
Abstract
The translation elongation factor eEF1A promotes protein synthesis. Its methylation by METTL13 increases its activity, supporting tumor growth. However, in some cancers, a high abundance of eEF1A isoforms is associated with a good prognosis. Here, we found that eEF1A2 exhibited oncogenic or tumor-suppressor functions depending on its interaction with METTL13 or the phosphatase PTEN, respectively. METTL13 and PTEN competed for interaction with eEF1A2 in the same structural domain. PTEN-bound eEF1A2 promoted the ubiquitination and degradation of the mitosis-promoting Aurora kinase A in the S and G2 phases of the cell cycle. eEF1A2 bridged the interactions between the SKP1-CUL1-FBXW7 (SCF) ubiquitin ligase complex, the kinase GSK3β, and Aurora-A, thereby facilitating the phosphorylation of Aurora-A in a degron site that was recognized by FBXW7. Genetic ablation of Eef1a2 or Pten in mice resulted in a greater abundance of Aurora-A and increased cell cycling in mammary tumors, which was corroborated in breast cancer tissues from patients. Reactivating this pathway using fimepinostat, which relieves inhibitory signaling directed at PTEN and increases FBXW7 expression, combined with inhibiting Aurora-A with alisertib, suppressed breast cancer cell proliferation in culture and tumor growth in vivo. The findings demonstrate a therapeutically exploitable, tumor-suppressive role for eEF1A2 in breast cancer.
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Affiliation(s)
- Warapen Treekitkarnmongkol
- Department of Translational Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Luisa M Solis
- Department of Translational Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Deivendran Sankaran
- Department of Translational Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Mihai Gagea
- Department of Veterinary Medicine and Surgery, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Pankaj K Singh
- Center for Translational Cancer Research, Texas A&M Health Science Center, Institute of Biosciences and Technology, Houston, TX 77030, USA
| | - Ragini Mistry
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Tristian Nguyen
- Department of Translational Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Kazuharu Kai
- Department of Translational Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Jiajun Liu
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, PR China
| | - Kaori Sasai
- Department of Molecular Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Yoshimi Jitsumori
- Department of Molecular Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Jianwen Liu
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, PR China
| | - Norio Nagao
- Department of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, 727-0023, Japan
| | - Fabio Stossi
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Michael A Mancini
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ignacio I Wistuba
- Department of Translational Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | | | - Jonathan M Lee
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Juan Cadiñanos
- Fundación Centro Médico de Asturias, 33193 Oviedo, Spain
- Instituto de Medicina Oncológica y Molecular de Asturias (IMOMA), 33193 Oviedo, Spain
| | - Kwong-Kwok Wong
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Catherine M Abbott
- Centre for Genomic & Experimental Medicine, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh EH4 2XU, UK
| | - Aysegul A Sahin
- Department of Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Suyu Liu
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Hiroshi Katayama
- Department of Translational Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
- Department of Molecular Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Subrata Sen
- Department of Translational Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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Patel SA, Hassan MK, Dixit M. Oncogenic activation of EEF1A2 expression: a journey from a putative to an established oncogene. Cell Mol Biol Lett 2024; 29:6. [PMID: 38172654 PMCID: PMC10765684 DOI: 10.1186/s11658-023-00519-9] [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: 09/04/2023] [Accepted: 12/01/2023] [Indexed: 01/05/2024] Open
Abstract
Protein synthesis via translation is a central process involving several essential proteins called translation factors. Although traditionally described as cellular "housekeepers," multiple studies have now supported that protein initiation and elongation factors regulate cell growth, apoptosis, and tumorigenesis. One such translation factor is eukaryotic elongation factor 1 alpha 2 (EEF1A2), a member of the eukaryotic elongation factor family, which has a canonical role in the delivery of aminoacyl-tRNA to the A-site of the ribosome in a guanosine 5'-triphosphate (GTP)-dependent manner. EEF1A2 differs from its closely related isoform, EEF1A1, in tissue distribution. While EEF1A1 is present ubiquitously, EEF1A2 replaces it in specialized tissues. The reason why certain specialized tissues need to essentially switch EEF1A1 expression altogether with EEF1A2 remains to be answered. Abnormal "switch on" of the EEF1A2 gene in normal tissues is witnessed and is seen as a cause of oncogenic transformation in a wide variety of solid tumors. This review presents the journey of finding increased expression of EEF1A2 in multiple cancers, establishing molecular mechanism, and exploring it as a target for cancer therapy. More precisely, we have compiled studies in seven types of cancers that have reported EEF1A2 overexpression. We have discussed the effect of aberrant EEF1A2 expression on the oncogenic properties of cells, signaling pathways, and interacting partners of EEF1A2. More importantly, in the last part, we have discussed the unique potential of EEF1A2 as a therapeutic target. This review article gives an up-to-date account of EEF1A2 as an oncogene and can draw the attention of the scientific community, attracting more research.
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Affiliation(s)
- Saket Awadhesbhai Patel
- School of Biological Sciences, National Institute of Science Education and Research, Room No. 204, P.O. Jatni, Khurda, Bhubaneswar, Odisha, 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India
| | - Md Khurshidul Hassan
- School of Biological Sciences, National Institute of Science Education and Research, Room No. 204, P.O. Jatni, Khurda, Bhubaneswar, Odisha, 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India
| | - Manjusha Dixit
- School of Biological Sciences, National Institute of Science Education and Research, Room No. 204, P.O. Jatni, Khurda, Bhubaneswar, Odisha, 752050, India.
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India.
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Crippa V, Malighetti F, Villa M, Graudenzi A, Piazza R, Mologni L, Ramazzotti D. Characterization of cancer subtypes associated with clinical outcomes by multi-omics integrative clustering. Comput Biol Med 2023; 162:107064. [PMID: 37267828 DOI: 10.1016/j.compbiomed.2023.107064] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/03/2023] [Accepted: 05/27/2023] [Indexed: 06/04/2023]
Abstract
Cancer patients show heterogeneous phenotypes and very different outcomes and responses even to common treatments, such as standard chemotherapy. This state-of-affairs has motivated the need for the comprehensive characterization of cancer phenotypes and fueled the generation of large omics datasets, comprising multiple omics data reported for the same patients, which might now allow us to start deciphering cancer heterogeneity and implement personalized therapeutic strategies. In this work, we performed the analysis of four cancer types obtained from the latest efforts by The Cancer Genome Atlas, for which seven distinct omics data were available for each patient, in addition to curated clinical outcomes. We performed a uniform pipeline for raw data preprocessing and adopted the Cancer Integration via MultIkernel LeaRning (CIMLR) integrative clustering method to extract cancer subtypes. We then systematically review the discovered clusters for the considered cancer types, highlighting novel associations between the different omics and prognosis.
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Affiliation(s)
- Valentina Crippa
- Department of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy.
| | - Federica Malighetti
- Department of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy.
| | - Matteo Villa
- Department of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy.
| | - Alex Graudenzi
- Department of Informatics, Systems and Communication, University of Milano-Bicocca, Milano, Italy
| | - Rocco Piazza
- Department of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy
| | - Luca Mologni
- Department of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy.
| | - Daniele Ramazzotti
- Department of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy.
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Akkour K, Alanazi IO, Alfadda AA, Alhalal H, Masood A, Musambil M, Rahman AMA, Alwehaibi MA, Arafah M, Bassi A, Benabdelkamel H. Tissue-Based Proteomic Profiling in Patients with Hyperplasia and Endometrial Cancer. Cells 2022; 11:cells11132119. [PMID: 35805203 PMCID: PMC9265283 DOI: 10.3390/cells11132119] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/24/2022] [Accepted: 06/27/2022] [Indexed: 12/24/2022] Open
Abstract
Uterine cancers are among the most prevalent gynecological malignancies, and endometrial cancer (EC) is the most common in this group. This study used tissue-based proteomic profiling analysis in patients with endometrial cancer and hyperplasia, and control patients. Conventional 2D gel electrophoresis, followed by a mass spectrometry approach with bioinformatics, including a network pathway analysis pipeline, was used to identify differentially expressed proteins and associated metabolic pathways between the study groups. Thirty-six patients (twelve with endometrial cancer, twelve with hyperplasia, and twelve controls) were enrolled in this study. The mean age of the participants was 46–75 years. Eighty-seven proteins were significantly differentially expressed between the study groups, of which fifty-three were significantly differentially regulated (twenty-eight upregulated and twenty-five downregulated) in the tissue samples of EC patients compared to the control (Ctrl). Furthermore, 26 proteins were significantly dysregulated (8 upregulated and 18 downregulated) in tissue samples of hyperplasia (HY) patients compared to Ctrl. Thirty-two proteins (nineteen upregulated and thirteen downregulated) including desmin, peptidyl prolyl cis-trans isomerase A, and zinc finger protein 844 were downregulated in the EC group compared to the HY group. Additionally, fructose bisphosphate aldolase A, alpha enolase, and keratin type 1 cytoskeletal 10 were upregulated in the EC group compared to those in the HY group. The proteins identified in this study were known to regulate cellular processes (36%), followed by biological regulation (16%). Ingenuity pathway analysis found that proteins that are differentially expressed between EC and HY are linked to AKT, ACTA2, and other signaling pathways. The panels of protein markers identified in this study could be used as potential biomarkers for distinguishing between EC and HY and early diagnosis and progression of EC from hyperplasia and normal patients.
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Affiliation(s)
- Khalid Akkour
- Obstetrics and Gynecology Department, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (K.A.); (H.A.); (A.B.)
| | - Ibrahim O. Alanazi
- The National Center for Biotechnology (NCB), Life Science and Environment Research Institute, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia;
| | - Assim A. Alfadda
- Proteomics Resource Unit, Obesity Research Center, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (A.A.A.); (A.M.); (M.M.); (M.A.A.)
- Department of Medicine, College of Medicine and King Saud Medical City, King Saud University, Riyadh 11461, Saudi Arabia
| | - Hani Alhalal
- Obstetrics and Gynecology Department, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (K.A.); (H.A.); (A.B.)
| | - Afshan Masood
- Proteomics Resource Unit, Obesity Research Center, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (A.A.A.); (A.M.); (M.M.); (M.A.A.)
| | - Mohthash Musambil
- Proteomics Resource Unit, Obesity Research Center, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (A.A.A.); (A.M.); (M.M.); (M.A.A.)
| | - Anas M. Abdel Rahman
- Metabolomics Section, Department of Clinical Genomics, Center for Genome Medicine, King Faisal Specialist Hospital and Research Centre (KFSHRC), Riyadh 11211, Saudi Arabia;
| | - Moudi A. Alwehaibi
- Proteomics Resource Unit, Obesity Research Center, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (A.A.A.); (A.M.); (M.M.); (M.A.A.)
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11461, Saudi Arabia
| | - Maria Arafah
- Department of Pathology, College of Medicine, King Saud University, King Saud University Medical City, Riyadh 11461, Saudi Arabia;
| | - Ali Bassi
- Obstetrics and Gynecology Department, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (K.A.); (H.A.); (A.B.)
| | - Hicham Benabdelkamel
- Proteomics Resource Unit, Obesity Research Center, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (A.A.A.); (A.M.); (M.M.); (M.A.A.)
- Correspondence:
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Bi Y, Wu ZH, Cao F. Prognostic value and immune relevancy of a combined autophagy-, apoptosis- and necrosis-related gene signature in glioblastoma. BMC Cancer 2022; 22:233. [PMID: 35241019 PMCID: PMC8892733 DOI: 10.1186/s12885-022-09328-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 02/22/2022] [Indexed: 12/25/2022] Open
Abstract
Background Glioblastoma (GBM) is considered the most malignant and devastating intracranial tumor without effective treatment. Autophagy, apoptosis, and necrosis, three classically known cell death pathways, can provide novel clinical and immunological insights, which may assist in designing personalized therapeutics. In this study, we developed and validated an effective signature based on autophagy-, apoptosis- and necrosis-related genes for prognostic implications in GBM patients. Methods Variations in the expression of genes involved in autophagy, apoptosis and necrosis were explored in 518 GBM patients from The Cancer Genome Atlas (TCGA) database. Univariate Cox analysis, least absolute shrinkage and selection operator (LASSO) analysis, and multivariate Cox analysis were performed to construct a combined prognostic signature. Kaplan–Meier survival, receiver-operating characteristic (ROC) curves and Cox regression analyses based on overall survival (OS) and progression-free survival (PFS) were conducted to estimate the independent prognostic performance of the gene signature. The Chinese Glioma Genome Atlas (CGGA) dataset was used for external validation. Finally, we investigated the differences in the immune microenvironment between different prognostic groups and predicted potential compounds targeting each group. Results A 16-gene cell death index (CDI) was established. Patients were clustered into either the high risk or the low risk groups according to the CDI score, and those in the low risk group presented significantly longer OS and PFS than the high CDI group. ROC curves demonstrated outstanding performance of the gene signature in both the training and validation groups. Furthermore, immune cell analysis identified higher infiltration of neutrophils, macrophages, Treg, T helper cells, and aDCs, and lower infiltration of B cells in the high CDI group. Interestingly, this group also showed lower expression levels of immune checkpoint molecules PDCD1 and CD200, and higher expression levels of PDCD1LG2, CD86, CD48 and IDO1. Conclusion Our study proposes that the CDI signature can be utilized as a prognostic predictor and may guide patients’ selection for preferential use of immunotherapy in GBM. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-022-09328-3.
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Affiliation(s)
- Ying Bi
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Zeng-Hong Wu
- Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Fei Cao
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
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[EEFSEC knockdown inhibits proliferation, migration and invasion of prostate cancer cells in vitro]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2021; 41:1787-1794. [PMID: 35012909 PMCID: PMC8752429 DOI: 10.12122/j.issn.1673-4254.2021.12.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To investigate the role of selenocysteine-tRNA specific eukaryotic elongation factor (EEFSEC) in regulating the proliferation, migration, and invasion of human prostate cancer 22Rv1 cells. METHODS We detected EEFSEC mRNA expression levels in human normal prostate cell line RWPE1 and human prostate cancer cell lines 22Rv1, LNCaP, Vcap and PC-3 using qRT-PCR and EEFSEC protein expression in surgical specimens of prostate cancer and adjacent tissues using Western blotting. 22Rv1 cells were infected with a lentiviral vector carrying EEFSEC shRNA or a control lentivirus and the interference efficiency was determined using Western blotting. XTT assay was used to assess the changes in the viability of the infected cells, and Transwell chamber assay was used to examine the changes in cell migration and invasion. The effect of EEFSEC knockdown on cell cycle progression was determined with flow cytometry and by detecting the expressions of cell cycle proteins using qRT-PCR. RESULTS EEFSEC was significantly upregulated in prostate cancer cells (P < 0.05), and a high expression of EEFSEC was associated with a poor prognosis of the patients with prostate cancer. In 22Rv1 cells, EEFSEC knockdown significantly suppressed the proliferation (P < 0.001), migration (P < 0.001) and invasion (P < 0.001) of the cells, resulted in cell cycle arrest in G0/G1 phase, obviously inhibited the expression of C-myc and CCNB1, and significantly increased the expression of p15. CONCLUSION EEFSEC knockdown can inhibit the proliferation, migration, and invasion of prostate cancer cells in vitro possibly by down-regulating the expression of C-myc.
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Péladeau C, Jasmin BJ. Targeting IRES-dependent translation as a novel approach for treating Duchenne muscular dystrophy. RNA Biol 2020; 18:1238-1251. [PMID: 33164678 DOI: 10.1080/15476286.2020.1847894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Internal-ribosomal entry sites (IRES) are translational elements that allow the initiation machinery to start protein synthesis via internal initiation. IRESs promote tissue-specific translation in stress conditions when conventional cap-dependent translation is inhibited. Since many IRES-containing mRNAs are relevant to diseases, this cellular mechanism is emerging as an attractive therapeutic target for pharmacological and genetic modulations. Indeed, there has been growing interest over the past years in determining the therapeutic potential of IRESs for several disease conditions such as cancer, neurodegeneration and neuromuscular diseases including Duchenne muscular dystrophy (DMD). IRESs relevant for DMD have been identified in several transcripts whose protein product results in functional improvements in dystrophic muscles. Together, these converging lines of evidence indicate that activation of IRES-mediated translation of relevant transcripts in DMD muscle represents a novel and appropriate therapeutic strategy for DMD that warrants further investigation, particularly to identify agents that can modulate their activity.
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Affiliation(s)
- Christine Péladeau
- Department of Cellular and Molecular Medicine, and the Eric Poulin Centre for Neuromuscular Disease, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Bernard J Jasmin
- Department of Cellular and Molecular Medicine, and the Eric Poulin Centre for Neuromuscular Disease, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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Bourdi M, Rudloff U, Patnaik S, Marugan J, Terse PS. Safety assessment of metarrestin in dogs: A clinical candidate targeting a subnuclear structure unique to metastatic cancer cells. Regul Toxicol Pharmacol 2020; 116:104716. [PMID: 32619635 PMCID: PMC8378239 DOI: 10.1016/j.yrtph.2020.104716] [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: 02/14/2020] [Revised: 05/09/2020] [Accepted: 06/16/2020] [Indexed: 11/28/2022]
Abstract
Pancreatic cancer is a leading cause of cancer-related deaths in the U.S. Ninety percent of patients with stage IV pancreatic cancer die within one year of diagnosis due to complications of metastasis. A metastatic potential of cancer cells has been shown to be closely associated with formation of perinucleolar compartment (PNC). Metarrestin, a first-in-class PNC inhibitor, was evaluated for its toxicity, toxicokinetics, and safety pharmacology in beagle dogs following every other day oral (capsule) administration for 28 days to support its introduction into clinical trials. The study consisted of four dose groups: vehicle; 0.25, 0.75 and 1.50 mg/kg/dose. Metarrestin reached its maximum concentration in blood at 3 h (overall median Tmax) across all doses with a mean t1/2 over 168 h of 55.5 h. Dose dependent increase in systemic exposure (Cmax and AUClast) with no sex difference was observed on days 1 and 27. Metarrestin accumulated from Day 1 to Day 27 at all dose levels and in both sexes by an overall factor of about 2.34. No mortality occurred during the dosing period; however, treatment-related clinical signs of toxicity consisting of hypoactivity, shaking/shivering, thinness, irritability, salivation, abnormal gait, tremors, ataxia and intermittent seizure-like activity were seen in both sexes at mid and high dose groups. Treatment-related effects on body weight and food consumption were seen at the mid and high dose levels. Safety pharmacology study showed no treatment-related effects on blood pressure, heart rate, corrected QT, PR, RR, or QRS intervals, or respiratory function parameters (respiratory rate, tidal volume, minute volume). There were no histopathological changes observed, with the exception of transient thymic atrophy which was considered to be non-adverse. Based primarily on clinical signs of toxicity, the No Observed Adverse Effect Level (NOAEL) in dogs was considered to be 0.25 mg/kg metarrestin after every other day dosing for 28 days with a mean of male and female Cmax = 82.5 ng/mL and AUClast = 2521 h*ng/mL, on Day 27.
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Affiliation(s)
- Mohammed Bourdi
- National Center for Advancing Translational Sciences, NIH, Rockville, Maryland, USA
| | - Udo Rudloff
- Rare Tumor Initiative, Pediatric Oncology Branch, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Samarjit Patnaik
- National Center for Advancing Translational Sciences, NIH, Rockville, Maryland, USA
| | - Juan Marugan
- National Center for Advancing Translational Sciences, NIH, Rockville, Maryland, USA
| | - Pramod S Terse
- National Center for Advancing Translational Sciences, NIH, Rockville, Maryland, USA.
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Shen Z, Li Y, Fang Y, Lin M, Feng X, Li Z, Zhan Y, Liu Y, Mou T, Lan X, Wang Y, Li G, Wang J, Deng H. SNX16 activates c-Myc signaling by inhibiting ubiquitin-mediated proteasomal degradation of eEF1A2 in colorectal cancer development. Mol Oncol 2020; 14:387-406. [PMID: 31876369 PMCID: PMC6998659 DOI: 10.1002/1878-0261.12626] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 12/01/2019] [Accepted: 12/02/2019] [Indexed: 01/11/2023] Open
Abstract
Sorting nexin 16 (SNX16), a member of the sorting nexin family, has been implicated in tumor development. However, the function of SNX16 has not yet been investigated in colorectal cancer (CRC). Here, we showed that SNX16 expression was significantly upregulated in CRC tissues compared with normal counterparts. Upregulated mRNA levels of SNX16 predicted poor survival of CRC patients. Functional experiments showed that SNX16 could promote CRC cells growth both in vitro and in vivo. Knockdown of SNX16 induced cell cycle arrest and apoptosis, whereas ectopic overexpression of SNX16 had the opposite effects. Mechanistically, SNX16‐eukaryotic translation elongation factor 1A2 (eEF1A2) interaction could inhibit the degradation and ubiquitination of eEF1A2, followed by activation of downstream c‐Myc signaling. Our study unveiled that the SNX16/eEF1A2/c‐Myc signaling axis could promote colorectal tumorigenesis and SNX16 might potentially serve as a novel biomarker for the diagnosis and an intervention of CRC.
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Affiliation(s)
- Zhiyong Shen
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yongsheng Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yuan Fang
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Mingdao Lin
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaochuang Feng
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Zhenkang Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yizhi Zhan
- Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yuechen Liu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Tingyu Mou
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaoliang Lan
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yanan Wang
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Guoxin Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jiping Wang
- Division of Surgical Oncology, Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Haijun Deng
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
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11
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Joung EK, Kim J, Yoon N, Maeng LS, Kim JH, Park S, Kang K, Kim JS, Ahn YH, Ko YH, Byun JH, Hong JH. Expression of EEF1A1 Is Associated with Prognosis of Patients with Colon Adenocarcinoma. J Clin Med 2019; 8:jcm8111903. [PMID: 31703307 PMCID: PMC6912729 DOI: 10.3390/jcm8111903] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 10/31/2019] [Accepted: 11/04/2019] [Indexed: 01/06/2023] Open
Abstract
Background: The prognostic role of the translational factor, elongation factor-1 alpha 1 (EEF1A1), in colon cancer is unclear. Objectives: The present study aimed to investigate the expression of EEF1A in tissues obtained from patients with stage II and III colon cancer and analyze its association with patient prognosis. Methods: A total of 281 patients with colon cancer who underwent curative resection were analyzed according to EEF1A1 expression. Results: The five-year overall survival in the high-EEF1A1 group was 87.7%, whereas it was 65.6% in the low-EEF1A1 expression group (hazard ratio (HR) 2.47, 95% confidence interval (CI) 1.38–4.44, p = 0.002). The five-year disease-free survival of patients with high EEF1A1 expression was 82.5%, which was longer than the rate of 55.4% observed for patients with low EEF1A1 expression (HR 2.94, 95% CI 1.72–5.04, p < 0.001). Univariate Cox regression analysis indicated that age, preoperative carcinoembryonic antigen level, adjuvant treatment, total number of metastatic lymph nodes, and EEF1A1 expression level were significant prognostic factors for death. In multivariate analysis, expression of EEF1A1 was an independent prognostic factor associated with death (HR 3.01, 95% CI 1.636–5.543, p < 0.001). EEF1A1 expression was also an independent prognostic factor for disease-free survival in multivariate analysis (HR 2.54, 95% CI 1.459–4.434, p < 0.001). Conclusions: Our study demonstrated that high expression of EEF1A1 has a favorable prognostic effect on patients with colon adenocarcinoma.
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Affiliation(s)
- Eun kyo Joung
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea;
| | - Jiyoung Kim
- Department of Pathology, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (J.K.); (N.Y.); (L.-s.M.)
| | - Nara Yoon
- Department of Pathology, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (J.K.); (N.Y.); (L.-s.M.)
| | - Lee-so Maeng
- Department of Pathology, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (J.K.); (N.Y.); (L.-s.M.)
| | - Ji Hoon Kim
- Department of General Surgery, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea;
| | | | - Keunsoo Kang
- Department of Microbiology, College of Natural Sciences, Dankook University, Cheonan 31116, Korea;
| | - Jeong Seon Kim
- Department of Molecular Medicine and Tissue Injury Defense Research Center, College of Medicine, Ewha Womans University, Seoul 03760, Korea; (J.S.K.); (Y.-H.A.)
| | - Young-Ho Ahn
- Department of Molecular Medicine and Tissue Injury Defense Research Center, College of Medicine, Ewha Womans University, Seoul 03760, Korea; (J.S.K.); (Y.-H.A.)
| | - Yoon Ho Ko
- Division of Oncology, Department of Internal Medicine, Eunpyeong St. Mary’s Hospital, The Catholic University of Korea, Seoul 03312, Korea;
- Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea
| | - Jae Ho Byun
- Division of Oncology, Department of Internal Medicine, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea
- Correspondence: (J.H.B.); (J.H.H.)
| | - Ji Hyung Hong
- Division of Oncology, Department of Internal Medicine, Eunpyeong St. Mary’s Hospital, The Catholic University of Korea, Seoul 03312, Korea;
- Correspondence: (J.H.B.); (J.H.H.)
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12
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Giudici F, Petracci E, Nanni O, Bottin C, Pinamonti M, Zanconati F, Scaggiante B. Elevated levels of eEF1A2 protein expression in triple negative breast cancer relate with poor prognosis. PLoS One 2019; 14:e0218030. [PMID: 31220107 PMCID: PMC6586289 DOI: 10.1371/journal.pone.0218030] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 05/23/2019] [Indexed: 02/08/2023] Open
Abstract
Eukaryotic elongation factor 1 alpha 2 (eEF1A2) is a translation factor selectively expressed by heart, skeletal muscle, nervous system and some specialized cells. Its ectopic expression relates with tumorigenesis in several types of human cancer. No data are available about the role of eEF1A2 in Triple Negative Breast Cancers (TNBC). This study investigated the relation between eEF1A2 protein levels and the prognosis of TNBC. A total of 84 TNBC diagnosed in the period 2002-2011 were included in the study. eEF1A2 protein level was measured in formalin-fixed paraffin-embedded tissues by immunohistochemistry in a semi-quantitative manner (sum of the percentage of positive cells x staining intensity) on a scale from 0 to 300. Cox regression assessed the association between eEF1A2 levels and disease-free survival (DFS) and breast cancer-specific survival (BCSS). Elevated values of eEF1A2 were associated with older age at diagnosis (p = 0.003), and androgen receptors positivity (p = 0.002). At univariate Cox analysis, eEF1A2 levels were not significantly associated with DFS and BCSS (p = 0.11 and p = 0.08, respectively) whereas adjusting for stage of disease, elevated levels of eEF1A2 protein resulted associated with poor prognosis (HR = 1.05, 95% CI: 1.01-1.11, p = 0.04 and HR = 1.07, 95% CI: 1.01-1.14, p = 0.03 for DFS and BCSS, respectively). This trend was confirmed analyzing negative versus positive samples by using categorized scores. Our data showed a negative prognostic role of eEF1A2 protein in TNBC, sustaining further investigations to confirm this result by wider and independent cohorts of patients.
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Affiliation(s)
- Fabiola Giudici
- Biostatistics Unit, Department of Medical, Surgical and Health Sciences, University of Trieste, Cattinara Academic Hospital, Trieste, Italy
| | - Elisabetta Petracci
- Unit of Biostatistics and Clinical Trials, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Meldola, Italy
| | - Oriana Nanni
- Unit of Biostatistics and Clinical Trials, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Meldola, Italy
| | - Cristina Bottin
- Department of Medical, Surgical and Health Sciences, University of Trieste, Cattinara Academic Hospital, Trieste, Italy
| | - Maurizio Pinamonti
- Department of Medical, Surgical and Health Sciences, University of Trieste, Cattinara Academic Hospital, Trieste, Italy
| | - Fabrizio Zanconati
- Department of Medical, Surgical and Health Sciences, University of Trieste, Cattinara Academic Hospital, Trieste, Italy
| | - Bruna Scaggiante
- Department of Life Sciences, University of Trieste, Trieste, Italy
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13
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Alur VC, Raju V, Vastrad B, Vastrad C. Mining Featured Biomarkers Linked with Epithelial Ovarian CancerBased on Bioinformatics. Diagnostics (Basel) 2019; 9:diagnostics9020039. [PMID: 30970615 PMCID: PMC6628368 DOI: 10.3390/diagnostics9020039] [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: 01/24/2019] [Revised: 03/31/2019] [Accepted: 04/05/2019] [Indexed: 11/16/2022] Open
Abstract
Epithelial ovarian cancer (EOC) is the18th most common cancer worldwide and the 8th most common in women. The aim of this study was to diagnose the potential importance of, as well as novel genes linked with, EOC and to provide valid biological information for further research. The gene expression profiles of E-MTAB-3706 which contained four high-grade ovarian epithelial cancer samples, four normal fallopian tube samples and four normal ovarian epithelium samples were downloaded from the ArrayExpress database. Pathway enrichment and Gene Ontology (GO) enrichment analysis of differentially expressed genes (DEGs) were performed, and protein-protein interaction (PPI) network, microRNA-target gene regulatory network and TFs (transcription factors) -target gene regulatory network for up- and down-regulated were analyzed using Cytoscape. In total, 552 DEGs were found, including 276 up-regulated and 276 down-regulated DEGs. Pathway enrichment analysis demonstrated that most DEGs were significantly enriched in chemical carcinogenesis, urea cycle, cell adhesion molecules and creatine biosynthesis. GO enrichment analysis showed that most DEGs were significantly enriched in translation, nucleosome, extracellular matrix organization and extracellular matrix. From protein-protein interaction network (PPI) analysis, modules, microRNA-target gene regulatory network and TFs-target gene regulatory network for up- and down-regulated, and the top hub genes such as E2F4, SRPK2, A2M, CDH1, MAP1LC3A, UCHL1, HLA-C (major histocompatibility complex, class I, C), VAT1, ECM1 and SNRPN (small nuclear ribonucleoprotein polypeptide N) were associated in pathogenesis of EOC. The high expression levels of the hub genes such as CEBPD (CCAAT enhancer binding protein delta) and MID2 in stages 3 and 4 were validated in the TCGA (The Cancer Genome Atlas) database. CEBPD andMID2 were associated with the worst overall survival rates in EOC. In conclusion, the current study diagnosed DEGs between normal and EOC samples, which could improve our understanding of the molecular mechanisms in the progression of EOC. These new key biomarkers might be used as therapeutic targets for EOC.
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Affiliation(s)
- Varun Chandra Alur
- Department of Endocrinology, J.J. M Medical College, Davanagere, Karnataka 577004, India.
| | - Varshita Raju
- Department of Obstetrics and Gynecology, J.J. M Medical College, Davanagere, Karnataka 577004, India.
| | - Basavaraj Vastrad
- Department of Pharmaceutics, SET`S College of Pharmacy, Dharwad, Karnataka 580002, India.
| | - Chanabasayya Vastrad
- Biostatistics and Bioinformatics,Chanabasava Nilaya, Bharthinagar,Dharwad, Karanataka 580001, India.
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14
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Lehmann SG, Seve M, Vanwonterghem L, Michelland S, Cunin V, Coll JL, Hurbin A, Bourgoin-Voillard S. A large scale proteome analysis of the gefitinib primary resistance overcome by KDAC inhibition in KRAS mutated adenocarcinoma cells overexpressing amphiregulin. J Proteomics 2019; 195:114-124. [PMID: 30660770 DOI: 10.1016/j.jprot.2019.01.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 01/14/2019] [Indexed: 02/06/2023]
Abstract
KDAC inhibitors (KDACi) overcome gefitinib primary resistance in non-small cell lung cancer (NSCLC) including mutant-KRAS lung adenocarcinoma. To identify which proteins are involved in the restoration of this sensitivity and to provide new therapeutic targets for mutant-KRAS lung adenocarcinoma, we performed an iTRAQ quantitative proteomic analysis after subcellular fractionation of H358-NSCLC treated with gefitinib and KDACi (TSA/NAM) versus gefitinib alone. The 86 proteins found to have been significantly dysregulated between the two conditions, were mainly involved in cellular metabolism and cell transcription processes. As expected, the pathway related to histone modifications was affected by the KDACi. Pathways known for controlling tumor development and (chemo)-resistance (miRNA biogenesis/glutathione metabolism) were affected by the KDACi/gefitinib treatment. Moreover, 57 dysregulated proteins were upstream of apoptosis (such as eEF1A2 and STAT1) and hence provide potential therapeutic targets. The inhibition by siRNA of eEF1A2 expression resulted in a slight decrease in H358-NSCLC viability. In addition, eEF1A2 and STAT1 siRNA transfections suggested that both STAT1 and eEF1A2 prevent AKT phosphorylation known for enhancing gefitinib resistance in NSCLC. Therefore, altogether our data provide new insights into proteome regulations in the context of overcoming the NSCLC resistance to gefitinib through KDACi in H358 KRAS mutated and amphiregulin-overexpressing NSCLC cells.
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Affiliation(s)
- Sylvia G Lehmann
- Univ. Grenoble Alpes, LBFA and BEeSy, PROMETHEE Proteomic Platform, Grenoble, France; Inserm, U1055, PROMETHEE Proteomic Platform, Grenoble, France; CHU Grenoble Alpes, Institut de Biologie et de Pathologie, PROMETHEE Proteomic Platform, Grenoble, France; Univ. Grenoble Alpes, ISTerre, F-38000 Grenoble, France
| | - Michel Seve
- Univ. Grenoble Alpes, LBFA and BEeSy, PROMETHEE Proteomic Platform, Grenoble, France; Inserm, U1055, PROMETHEE Proteomic Platform, Grenoble, France; CHU Grenoble Alpes, Institut de Biologie et de Pathologie, PROMETHEE Proteomic Platform, Grenoble, France
| | - Laetitia Vanwonterghem
- Cancer target and experimental therapeutics, Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5301, Univ. Grenoble Alpes, F-38000 Grenoble, France
| | - Sylvie Michelland
- Univ. Grenoble Alpes, LBFA and BEeSy, PROMETHEE Proteomic Platform, Grenoble, France; Inserm, U1055, PROMETHEE Proteomic Platform, Grenoble, France; CHU Grenoble Alpes, Institut de Biologie et de Pathologie, PROMETHEE Proteomic Platform, Grenoble, France
| | - Valérie Cunin
- Univ. Grenoble Alpes, LBFA and BEeSy, PROMETHEE Proteomic Platform, Grenoble, France; Inserm, U1055, PROMETHEE Proteomic Platform, Grenoble, France; CHU Grenoble Alpes, Institut de Biologie et de Pathologie, PROMETHEE Proteomic Platform, Grenoble, France
| | - Jean-Luc Coll
- Cancer target and experimental therapeutics, Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5301, Univ. Grenoble Alpes, F-38000 Grenoble, France
| | - Amandine Hurbin
- Cancer target and experimental therapeutics, Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5301, Univ. Grenoble Alpes, F-38000 Grenoble, France.
| | - Sandrine Bourgoin-Voillard
- Univ. Grenoble Alpes, LBFA and BEeSy, PROMETHEE Proteomic Platform, Grenoble, France; Inserm, U1055, PROMETHEE Proteomic Platform, Grenoble, France; CHU Grenoble Alpes, Institut de Biologie et de Pathologie, PROMETHEE Proteomic Platform, Grenoble, France.
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15
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Lin HW, Chiang YC, Sun NY, Chen YL, Chang CF, Tai YJ, Chen CA, Cheng WF. CHI3L1 results in poor outcome of ovarian cancer by promoting properties of stem-like cells. Endocr Relat Cancer 2019; 26:73-88. [PMID: 30121622 DOI: 10.1530/erc-18-0300] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 08/13/2018] [Indexed: 12/15/2022]
Abstract
The role of chitinase-3-like protein 1 (CHI3L1) in ovarian cancer and the possible mechanisms were elucidated. CHI3L1 is a secreted glycoprotein and associated with inflammation, fibrosis, asthma, extracellular tissue remodeling and solid tumors. Our previous study showed CHI3L1 could be a potential prognostic biomarker for epithelial ovarian cancer and could protect cancer cells from apoptosis. Therefore, clinical data and quantitation of CHI3L1 of ovarian cancer patients, tumor spheroid formation, side-population assays, Aldefluor and apoptotic assays, ELISA, RT-PCR, immunoblotting and animal experiments were performed in two ovarian cancer cells lines, OVCAR3 and CA5171, and their CHI3L1-overexpressing and -knockdown transfectants. High expression of CHI3L1 was associated with poor outcome and chemoresistance in ovarian cancer patients. The mRNA expression of CHI3L1 in CA5171 ovarian cancer stem-like cells was 3-fold higher than in CA5171 parental cells. CHI3L1 promoted the properties of ovarian cancer stem-like cells including generating more and larger tumor spheroids and a higher percentage of ALDH+ in tumor cells and promoting resistance to cytotoxic drug-induced apoptosis. CHI3L1 could induce both the Akt (essential) and Erk signaling pathways, and then enhance expression of β-catenin followed by SOX2, and finally promote tumor spheroid formation and other properties of ovarian cancer stem-like cells. OVCAR3 CHI3L1-overexpressing transfectants were more tumorigenic in vivo, whereas CA5171 CHI3L1-knockdown transfectants were not tumorigenic in vivo. CHI3L1 critically enhances the properties of ovarian cancer stem-like cells. CHI3L1 or CHI3L1-regulated signaling pathways and molecules could be potential therapeutic targets in ovarian cancer.
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Affiliation(s)
- Han-Wei Lin
- Graduate Institute of Oncology, National Taiwan University, Taipei, Taiwan
| | - Ying-Cheng Chiang
- Department of Obstetrics and Gynecology, National Taiwan University, Taipei, Taiwan
| | - Nai-Yun Sun
- Graduate Institute of Oncology, National Taiwan University, Taipei, Taiwan
| | - Yu-Li Chen
- Department of Obstetrics and Gynecology, National Taiwan University, Taipei, Taiwan
| | - Chi-Fang Chang
- Department of Obstetrics and Gynecology, National Taiwan University, Taipei, Taiwan
| | - Yi-Jou Tai
- Department of Obstetrics and Gynecology, National Taiwan University, Taipei, Taiwan
| | - Chi-An Chen
- Department of Obstetrics and Gynecology, National Taiwan University, Taipei, Taiwan
| | - Wen-Fang Cheng
- Graduate Institute of Oncology, National Taiwan University, Taipei, Taiwan
- Department of Obstetrics and Gynecology, National Taiwan University, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
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16
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Hassan MK, Kumar D, Naik M, Dixit M. The expression profile and prognostic significance of eukaryotic translation elongation factors in different cancers. PLoS One 2018; 13:e0191377. [PMID: 29342219 PMCID: PMC5771626 DOI: 10.1371/journal.pone.0191377] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 01/03/2018] [Indexed: 12/13/2022] Open
Abstract
Eukaryotic translation factors, especially initiation factors have garnered much attention with regards to their role in the onset and progression of different cancers. However, the expression levels and prognostic significance of translation elongation factors remain poorly explored in different cancers. In this study, we have investigated the mRNA transcript levels of seven translation elongation factors in different cancer types using Oncomine and TCGA databases. Furthermore, we have identified the prognostic significance of these factors using Kaplan-Meier Plotter and SurvExpress databases. We observed altered expression levels of all the elongation factors in different cancers. Higher expression of EEF1A2, EEF1B2, EEF1G, EEF1D, EEF1E1 and EEF2 was observed in most of the cancer types, whereas reverse trend was observed for EEF1A1. Overexpression of many factors predicted poor prognosis in breast (EEF1D, EEF1E1, EEF2) and lung cancer (EEF1A2, EEF1B2, EEF1G, EEF1E1). However, we didn’t see any common correlation of expression levels of elongation factors with survival outcomes across cancer types. Cancer subtype stratification showed association of survival outcomes and expression levels of elongation factors in specific sub-types of breast, lung and gastric cancer. Most interestingly, we observed a reciprocal relationship between the expression levels of the two EEF1A isoforms viz. EEF1A1 and EEF1A2, in most of the cancer types. Our results suggest that translation elongation factors can have a role in tumorigenesis and affect survival in cancer specific manner. Elongation factors have potential to serve as biomarkers and therapeutic drug targets, yet further study is required. Reciprocal relationship of differential expression between EEF1A isoforms observed in multiple cancer types indicates opposing roles in cancer and needs further investigation.
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Affiliation(s)
- Md. Khurshidul Hassan
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhimpur- Padanpur, Jatni, Khurda, Odisha, India
| | - Dinesh Kumar
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhimpur- Padanpur, Jatni, Khurda, Odisha, India
| | - Monali Naik
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhimpur- Padanpur, Jatni, Khurda, Odisha, India
| | - Manjusha Dixit
- School of Biological Sciences, National Institute of Science Education and Research, HBNI, Bhimpur- Padanpur, Jatni, Khurda, Odisha, India
- * E-mail:
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17
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Zhang X, Hu L, Du M, Wei X, Zhang J, Hui Y, Chen C, Li G, Hou J. Eukaryotic Elongation Factor 2 (eEF2) is a Potential Biomarker of Prostate Cancer. Pathol Oncol Res 2017; 24:885-890. [DOI: 10.1007/s12253-017-0302-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 09/01/2017] [Indexed: 12/11/2022]
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18
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Tarrant DJ, Stirpe M, Rowe M, Howard MJ, von der Haar T, Gourlay CW. Inappropriate expression of the translation elongation factor 1A disrupts genome stability and metabolism. J Cell Sci 2016; 129:4455-4465. [PMID: 27807005 PMCID: PMC5201016 DOI: 10.1242/jcs.192831] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Accepted: 10/26/2016] [Indexed: 02/02/2023] Open
Abstract
The translation elongation factor eEF1A is one of the most abundant proteins found within cells, and its role within protein synthesis is well documented. Levels of eEF1A are tightly controlled, with inappropriate expression linked to oncogenesis. However, the mechanisms by which increased eEF1A expression alters cell behaviour are unknown. Our analyses in yeast suggest that elevation of eEF1A levels leads to stabilisation of the spindle pole body and changes in nuclear organisation. Elevation of the eEF1A2 isoform also leads to altered nuclear morphology in cultured human cells, suggesting a conserved role in maintaining genome stability. Gene expression and metabolomic analyses reveal that the level of eEF1A is crucial for the maintenance of metabolism and amino acid levels in yeast, most likely because of its role in the control of vacuole function. Increased eEF1A2 levels trigger lysosome biogenesis in cultured human cells, also suggesting a conserved role within metabolic control mechanisms. Taken together, our data suggest that the control of eEF1A levels is important for the maintenance of a number of cell functions beyond translation and that its de-regulation might contribute to its oncogenic properties. Summary: The translation elongation factor eEF1A is elevated in some cancers. We use yeast and human cell models to show that eEF1A elevation leads to genome instability and metabolic alterations that might affect its oncogenic properties.
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Affiliation(s)
- Daniel J Tarrant
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Mariarita Stirpe
- Department of Biology and Biotechnology, Sapienza, University of Rome, 00185 Rome, Italy
| | - Michelle Rowe
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Mark J Howard
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Tobias von der Haar
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Campbell W Gourlay
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
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19
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Yang G, Zong H. Overexpression of PDZK1IP1, EEF1A2 and RPL41 genes in intrahepatic cholangiocarcinoma. Mol Med Rep 2016; 13:4786-90. [PMID: 27082702 DOI: 10.3892/mmr.2016.5110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 02/24/2016] [Indexed: 11/05/2022] Open
Abstract
Intrahepatic cholangiocarcinoma (iCCA) is an aggressive malignancy in the liver, which is associated with a poor prognosis. However, the molecular pathogenesis of iCCA remains unclear. RNA-Seq for tumor and para-tumor sample pairs enables the characterization of changes in the gene expression profiles of patients with iCCA. The present study analyzed RNA‑Seq data of seven iCCA para‑tumor and tumor sample pairs. Differential gene expression analysis demonstrated significant upregulation of PDZK1IP1, EEF1A2 and RPL41 (ENSG00000279483) genes in the iCCA samples when compared with the matched para‑tumor samples. Furthermore, genes associated with the immune system, metabolism and metabolic energy were significantly downregulated in the iCCA tumor tissues, indicating that this is involved in the pathogenesis of iCCA. The present study aimed to elucidate the gene expression patterns associated with the tumorigenesis of iCCA by comparing tumor and normal tissues, in order to isolate novel diagnostic factors for iCCA.
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Affiliation(s)
- Guanghua Yang
- Department of General Surgery, Huashan Hospital Affiliated to Fudan University, Shanghai 200040, P.R. China
| | - Huajie Zong
- Department of General Surgery, Huashan Hospital Affiliated to Fudan University, Shanghai 200040, P.R. China
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20
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Reijm EA, Sieuwerts AM, Smid M, Vries JBD, Mostert B, Onstenk W, Peeters D, Dirix LY, Seynaeve CM, Jager A, de Jongh FE, Hamberg P, van Galen A, Kraan J, Jansen MPHM, Gratama JW, Foekens JA, Martens JWM, Berns EMJJ, Sleijfer S. An 8-gene mRNA expression profile in circulating tumor cells predicts response to aromatase inhibitors in metastatic breast cancer patients. BMC Cancer 2016; 16:123. [PMID: 26892682 PMCID: PMC4759736 DOI: 10.1186/s12885-016-2155-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 02/10/2016] [Indexed: 12/29/2022] Open
Abstract
Background Molecular characterization of circulating tumor cells (CTC) is promising for personalized medicine. We aimed to identify a CTC gene expression profile predicting outcome to first-line aromatase inhibitors in metastatic breast cancer (MBC) patients. Methods: CTCs were isolated from 78 MBC patients before treatment start. mRNA expression levels of 96 genes were measured by quantitative reverse transcriptase polymerase chain reaction. After applying predefined exclusion criteria based on lack of sufficient RNA quality and/or quantity, the data from 45 patients were used to construct a gene expression profile to predict poor responding patients, defined as disease progression or death <9 months, by a leave-one-out cross validation. Results Of the 45 patients, 19 were clinically classified as poor responders. To identify them, the 75 % most variable genes were used to select genes differentially expressed between good and poor responders. An 8-gene CTC predictor was significantly associated with outcome (Hazard Ratio [HR] 4.40, 95 % Confidence Interval [CI]: 2.17–8.92, P < 0.001). This predictor identified poor responding patients with a sensitivity of 63 % and a positive predictive value of 75 %, while good responding patients were correctly predicted in 85 % of the cases. In multivariate Cox regression analysis, including CTC count at baseline, the 8-gene CTC predictor was the only factor independently associated with outcome (HR 4.59 [95 % CI: 2.11–9.56], P < 0.001). This 8-gene signature was not associated with outcome in a group of 71 MBC patients treated with systemic treatments other than AI. Conclusions An 8-gene CTC predictor was identified which discriminates good and poor outcome to first-line aromatase inhibitors in MBC patients. Although results need to be validated, this study underscores the potential of molecular characterization of CTCs. Electronic supplementary material The online version of this article (doi:10.1186/s12885-016-2155-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Esther A Reijm
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Anieta M Sieuwerts
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Marcel Smid
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Joan Bolt-de Vries
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Bianca Mostert
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Wendy Onstenk
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Dieter Peeters
- Translational Cancer Research Unit, Oncology Center GZA Hospitals Sint-Augustinus and Department of Oncology, University of Antwerp, Antwerp, Belgium
| | - Luc Y Dirix
- Translational Cancer Research Unit, Oncology Center GZA Hospitals Sint-Augustinus and Department of Oncology, University of Antwerp, Antwerp, Belgium
| | - Caroline M Seynaeve
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Agnes Jager
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Felix E de Jongh
- Department of Internal Medicine, Ikazia Hospital, Rotterdam, The Netherlands
| | - Paul Hamberg
- Department of Internal Medicine, Sint Franciscus Gasthuis, Rotterdam, The Netherlands
| | - Anne van Galen
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Jaco Kraan
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Maurice P H M Jansen
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Jan W Gratama
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - John A Foekens
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - John W M Martens
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Els M J J Berns
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands
| | - Stefan Sleijfer
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC - Cancer Institute, Erasmus University Medical Center, Room He 116, P.O. Box 2040, Rotterdam, 3000 CA, The Netherlands.
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Cox MC, Reese LM, Bickford LR, Verbridge SS. Toward the Broad Adoption of 3D Tumor Models in the Cancer Drug Pipeline. ACS Biomater Sci Eng 2015; 1:877-894. [PMID: 33429520 DOI: 10.1021/acsbiomaterials.5b00172] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Despite a cost of approximately $1 billion to develop a new cancer drug, about 90% of drugs that enter clinical trials fail. A tremendous opportunity exists to streamline the drug selection and testing process, and innovative approaches promise to reduce the burdensome cost of health care for those suffering from cancer. There is great potential for 3D models of human tumors to complement more traditional testing methods; however, the shift from 2D to 3D assays at early stages of the drug discovery and development process is far from widely accepted. 3D platforms range from simple tumor spheroids to more complex microfluidic hydrogels that better mimic the tumor microenvironment. While several companies have developed and patented advanced high-throughput 3D platforms for drug screening, their cost and complexity have limited their adoption as an industry standard. In this review, we will highlight the various tumor platforms that have been developed, emphasizing the approaches that have successfully led to commercial products. We will then consider potential directions toward more relevant tumor models, advantages of the adoption of such platforms within the drug development and screening process, and new opportunities in personalized medicine that such platforms will uniquely enable.
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Affiliation(s)
- Megan C Cox
- School of Biomedical Engineering and Sciences, Virginia Tech-Wake Forest University, Blacksburg, Virginia 24061, United States
| | - Laura M Reese
- School of Biomedical Engineering and Sciences, Virginia Tech-Wake Forest University, Blacksburg, Virginia 24061, United States
| | - Lissett R Bickford
- School of Biomedical Engineering and Sciences, Virginia Tech-Wake Forest University, Blacksburg, Virginia 24061, United States
| | - Scott S Verbridge
- School of Biomedical Engineering and Sciences, Virginia Tech-Wake Forest University, Blacksburg, Virginia 24061, United States
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22
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Abbas W, Kumar A, Herbein G. The eEF1A Proteins: At the Crossroads of Oncogenesis, Apoptosis, and Viral Infections. Front Oncol 2015; 5:75. [PMID: 25905039 PMCID: PMC4387925 DOI: 10.3389/fonc.2015.00075] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 03/12/2015] [Indexed: 12/12/2022] Open
Abstract
Eukaryotic translation elongation factors 1 alpha, eEF1A1 and eEF1A2, are not only translation factors but also pleiotropic proteins that are highly expressed in human tumors, including breast cancer, ovarian cancer, and lung cancer. eEF1A1 modulates cytoskeleton, exhibits chaperone-like activity and also controls cell proliferation and cell death. In contrast, eEF1A2 protein favors oncogenesis as shown by the fact that overexpression of eEF1A2 leads to cellular transformation and gives rise to tumors in nude mice. The eEF1A2 protein stimulates the phospholipid signaling and activates the Akt-dependent cell migration and actin remodeling that ultimately favors tumorigenesis. In contrast, inactivation of eEF1A proteins leads to immunodeficiency, neural and muscular defects, and favors apoptosis. Finally, eEF1A proteins interact with several viral proteins resulting in enhanced viral replication, decreased apoptosis, and increased cellular transformation. This review summarizes the recent findings on eEF1A proteins indicating that eEF1A proteins play a critical role in numerous human diseases through enhancement of oncogenesis, blockade of apoptosis, and increased viral pathogenesis.
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Affiliation(s)
- Wasim Abbas
- Department of Biology, SBA School of Science and Engineering, Lahore University of Management Sciences , Lahore , Pakistan
| | - Amit Kumar
- UPRES EA 4266, Laboratory of Pathogens and Inflammation, Department of Virology, CHRU Besançon, Université de Franche-Comté , Besançon , France
| | - Georges Herbein
- UPRES EA 4266, Laboratory of Pathogens and Inflammation, Department of Virology, CHRU Besançon, Université de Franche-Comté , Besançon , France
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Yang S, Lu M, Chen Y, Meng D, Sun R, Yun D, Zhao Z, Lu D, Li Y. Overexpression of eukaryotic elongation factor 1 alpha-2 is associated with poorer prognosis in patients with gastric cancer. J Cancer Res Clin Oncol 2015; 141:1265-75. [DOI: 10.1007/s00432-014-1897-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 12/15/2014] [Indexed: 01/14/2023]
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Longerich T. [EEF1A2 inhibits the p53 function in hepatocellular carcinoma via PI3K/AKT/mTOR-dependent stabilization of MDM4]. DER PATHOLOGE 2014; 35 Suppl 2:177-84. [PMID: 25394965 DOI: 10.1007/s00292-014-2007-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Upregulation of mouse double minute 4 (MDM4) is a frequent event in human hepatocellular carcinoma (HCC) but the underlying molecular mechanisms are poorly characterized. In this study a potential role of the phosphoinositide-3-kinase/v-AKT murine thymoma viral oncogene homolog/mammalian target of rapamycin (PI3K/AKT/mTOR) cascade was investigated in the regulation of MDM4 in HCC. Inhibition of the PI3K-AKT and/or mTOR pathways lowered MDM4 protein levels in HCC cells. Mechanistic protection from proteasomal degradation resulted from de-ubiquitination by ubiquitin-specific protease 2a and AKT-mediated phosphorylation of MDM4, thus increasing MDM4 protein levels. These findings were corroborated in a chimeric AKT mouse model. Upregulation of PI3K/AKT/mTOR signaling may result from overexpression of the eukaryotic elongation factor 1A2 (EEF1A2). Finally, a strong association between the expression of EEF1A2, phosphorylated AKT and MDM4 was observed in human HCC samples. Strong activation of the EEF1A2/PI3K/AKT/mTOR/MDM4 signaling pathway was observed in HCC patients with short survival suggesting that targeting this axis might be a promising approach in a subset of HCC patients.
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Affiliation(s)
- T Longerich
- Pathologisches Institut, Universitätsklinikum Heidelberg, Im Neuenheimer Feld 224, 69120, Heidelberg, Deutschland,
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25
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ELGOHARY NAHLA, PELLEGRINO ROSSELLA, NEUMAN OLAF, ELZAWAHRY HEBAM, SABER MAGDYM, ZENELDIN AHMEDA, GEFERS ROBERT, EHEMAN VOLKER, SCHEMMER PETER, SCHIRMACHER PETER, LONGERICH THOMAS. Protumorigenic role of Timeless in hepatocellular carcinoma. Int J Oncol 2014; 46:597-606. [DOI: 10.3892/ijo.2014.2751] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 10/08/2014] [Indexed: 11/05/2022] Open
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Crepin T, Shalak VF, Yaremchuk AD, Vlasenko DO, McCarthy A, Negrutskii BS, Tukalo MA, El'skaya AV. Mammalian translation elongation factor eEF1A2: X-ray structure and new features of GDP/GTP exchange mechanism in higher eukaryotes. Nucleic Acids Res 2014; 42:12939-48. [PMID: 25326326 PMCID: PMC4227793 DOI: 10.1093/nar/gku974] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Eukaryotic elongation factor eEF1A transits between the GTP- and GDP-bound conformations during the ribosomal polypeptide chain elongation. eEF1A*GTP establishes a complex with the aminoacyl-tRNA in the A site of the 80S ribosome. Correct codon–anticodon recognition triggers GTP hydrolysis, with subsequent dissociation of eEF1A*GDP from the ribosome. The structures of both the ‘GTP’- and ‘GDP’-bound conformations of eEF1A are unknown. Thus, the eEF1A-related ribosomal mechanisms were anticipated only by analogy with the bacterial homolog EF-Tu. Here, we report the first crystal structure of the mammalian eEF1A2*GDP complex which indicates major differences in the organization of the nucleotide-binding domain and intramolecular movements of eEF1A compared to EF-Tu. Our results explain the nucleotide exchange mechanism in the mammalian eEF1A and suggest that the first step of eEF1A*GDP dissociation from the 80S ribosome is the rotation of the nucleotide-binding domain observed after GTP hydrolysis.
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Affiliation(s)
- Thibaut Crepin
- University of Grenoble Alpes, UVHCI, F-38000 Grenoble, France CNRS, UVHCI, F-38000 Grenoble, France Unit for Virus Host-Cell Interactions, University of Grenoble Alpes-EMBL-CNRS, 71 avenue des Martyrs, 38042 France
| | - Vyacheslav F Shalak
- State Key laboratory of Molecular and Cellular Biology, Institute of Molecular Biology and Genetics, 150 Zabolotnogo str., Kiev 03680, Ukraine
| | - Anna D Yaremchuk
- State Key laboratory of Molecular and Cellular Biology, Institute of Molecular Biology and Genetics, 150 Zabolotnogo str., Kiev 03680, Ukraine European Molecular Biology Laboratory, Grenoble Outstation, 71 avenue des Martyrs, 38042 France
| | - Dmytro O Vlasenko
- State Key laboratory of Molecular and Cellular Biology, Institute of Molecular Biology and Genetics, 150 Zabolotnogo str., Kiev 03680, Ukraine
| | - Andrew McCarthy
- Unit for Virus Host-Cell Interactions, University of Grenoble Alpes-EMBL-CNRS, 71 avenue des Martyrs, 38042 France European Molecular Biology Laboratory, Grenoble Outstation, 71 avenue des Martyrs, 38042 France
| | - Boris S Negrutskii
- State Key laboratory of Molecular and Cellular Biology, Institute of Molecular Biology and Genetics, 150 Zabolotnogo str., Kiev 03680, Ukraine
| | - Michail A Tukalo
- State Key laboratory of Molecular and Cellular Biology, Institute of Molecular Biology and Genetics, 150 Zabolotnogo str., Kiev 03680, Ukraine
| | - Anna V El'skaya
- State Key laboratory of Molecular and Cellular Biology, Institute of Molecular Biology and Genetics, 150 Zabolotnogo str., Kiev 03680, Ukraine
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Pellegrino R, Calvisi DF, Neumann O, Kolluru V, Wesely J, Chen X, Wang C, Wuestefeld T, Ladu S, Elgohary N, Bermejo JL, Radlwimmer B, Zörnig M, Zender L, Dombrowski F, Evert M, Schirmacher P, Longerich T. EEF1A2 inactivates p53 by way of PI3K/AKT/mTOR-dependent stabilization of MDM4 in hepatocellular carcinoma. Hepatology 2014; 59:1886-99. [PMID: 24285179 PMCID: PMC4115286 DOI: 10.1002/hep.26954] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 11/26/2013] [Indexed: 01/10/2023]
Abstract
UNLABELLED Mouse Double Minute homolog 4 (MDM4) gene up-regulation often occurs in human hepatocellular carcinoma (HCC), but the molecular mechanisms responsible for its induction remain poorly understood. Here we investigated the role of the phosphoinositide-3-kinase/v-akt murine thymoma viral oncogene homolog/mammalian target of rapamycin (PI3K/AKT/mTOR) axis in the regulation of MDM4 levels in HCC. The activity of MDM4 and the PI3K/AKT/mTOR pathway was modulated in human HCC cell lines by way of silencing and overexpression experiments. Expression of main pathway components was analyzed in an AKT mouse model and human HCCs. MDM4 inhibition resulted in growth restraint of HCC cell lines both in vitro and in vivo. Inhibition of the PI3K-AKT and/or mTOR pathways lowered MDM4 protein levels in HCC cells and reactivated p53-dependent transcription. Deubiquitination by ubiquitin-specific protease 2a and AKT-mediated phosphorylation protected MDM4 from proteasomal degradation and increased its protein stability. The eukaryotic elongation factor 1A2 (EEF1A2) was identified as an upstream inducer of PI3K supporting MDM4 stabilization. Also, we detected MDM4 protein up-regulation in an AKT mouse model and a strong correlation between the expression of EEF1A2, activated/phosphorylated AKT, and MDM4 in human HCC (each rho > 0.8, P < 0.001). Noticeably, a strong activation of this cascade was associated with shorter patient survival. CONCLUSION The EEF1A2/PI3K/AKT/mTOR axis promotes the protumorigenic stabilization of the MDM4 protooncogene in human HCC by way of a posttranscriptional mechanism. The activation level of the EEF1A2/PI3K/AKT/mTOR/MDM4 axis significantly influences the survival probability of HCC patients in vivo and may thus represent a promising molecular target.
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Affiliation(s)
| | - Diego F. Calvisi
- Institute of Pathology, University of Greifswald, Greifswald, Germany
| | - Olaf Neumann
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Venkatesh Kolluru
- Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, Frankfurt/Main, Germany
| | - Josephine Wesely
- Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, Frankfurt/Main, Germany
| | - Xin Chen
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA, USA
| | - Chunmei Wang
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA, USA
| | - Torsten Wuestefeld
- Division of Translational Gastrointestinal Oncology, Department of Internal Medicine I, University of Tübingen, Tübingen, Germany
| | - Sara Ladu
- Department of Medicine and Aging, University of Chieti, Chieti, Italy
| | - Nahla Elgohary
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Justo Lorenzo Bermejo
- Institute of Medical Biometry and Informatics, University Hospital Heidelberg, Heidelberg, Germany
| | - Bernhard Radlwimmer
- Division of Molecular Genetics, German Cancer Research Centre, Heidelberg, Germany
| | - Martin Zörnig
- Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, Frankfurt/Main, Germany
| | - Lars Zender
- Division of Translational Gastrointestinal Oncology, Department of Internal Medicine I, University of Tübingen, Tübingen, Germany
| | - Frank Dombrowski
- Institute of Pathology, University of Greifswald, Greifswald, Germany
| | - Matthias Evert
- Institute of Pathology, University of Greifswald, Greifswald, Germany
| | - Peter Schirmacher
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Thomas Longerich
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
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28
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Matias-Guiu X, Davidson B. Prognostic biomarkers in endometrial and ovarian carcinoma. Virchows Arch 2014; 464:315-31. [PMID: 24504546 DOI: 10.1007/s00428-013-1509-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 11/05/2013] [Accepted: 11/07/2013] [Indexed: 02/06/2023]
Abstract
This article reviews the main prognostic and predictive biomarkers of endometrial (EC) and ovarian carcinoma (OC). In EC, prognosis still relies on conventional pathological features such as histological type and grade, as well as myometrial or lymphovascular space invasion. Estrogen receptor, p53, Ki-67, and ploidy analysis are the most promising biomarkers among a long list of molecules that have been proposed. Also, a number of putative predictive biomarkers have been proposed in molecular targeted therapy. In OC, prognosis is predominantly dependent on disease stage at diagnosis and the extent of residual disease at primary operation. Diagnostic markers which aid in establishing histological type in OC are available. However, not a single universally accepted predictive or prognostic marker exists to date. Targeted therapy has been growingly focused at in recent years, in view of the frequent development of chemoresistance at recurrent disease. The present review emphasizes the crucial role of correct pathological classification and stringent selection criteria of the material studied as basis for any evaluation of biological markers. It further emphasizes the promise of targeted therapy in EC and OC, while simultaneously highlighting the difficulties remaining before this can become standard of care.
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Affiliation(s)
- Xavier Matias-Guiu
- Department of Pathology and Molecular Genetics and Research Laboratory, Hospital Universitari Arnau de Vilanova, IRBLLEIDA, University of Lleida, Av. Alcalde Rovira Roure 80, 25198, Lleida, Spain,
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Proto-oncogenic isoform A2 of eukaryotic translation elongation factor eEF1 is a target of miR-663 and miR-744. Br J Cancer 2013; 108:2304-11. [PMID: 23695020 PMCID: PMC3681015 DOI: 10.1038/bjc.2013.243] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Background: Eukaryotic translation elongation factor 1A2 (eEF1A2) is a known proto-oncogene. We proposed that stimulation of the eEF1A2 expression in cancer tissues is caused by the loss of miRNA-mediated control. Methods: Impact of miRNAs on eEF1A2 at the mRNA and protein levels was examined by qPCR and western blot, respectively. Dual-luciferase assay was applied to examine the influence of miRNAs on 3′-UTR of EEF1A2. To detect miRNA-binding sites, mutations into the 3′-UTR of EEF1A2 mRNA were introduced by the overlap extension PCR. Results: miR-663 and miR-744 inhibited the expression of luciferase gene attached to the 3′-UTR of EEF1A2 up to 20% and 50%, respectively. In MCF7 cells, overexpression of miR-663 and miR-744 reduced the EEF1A2 mRNA level by 30% and 50%. Analogous effects were also observed at the eEF1A2 protein level. In resveratrol-treated MCF7 cells the upregulation of mir-663 and mir-744 was accompanied by downregulation of EEF1A2 mRNA. Both miRNAs were able to inhibit the proliferation of MCF7 cells. Conclusion: miR-663 and miR-744 mediate inhibition of the proto-oncogene eEF1A2 expression that results in retardation of the MCF7 cancer cells proliferation. Antitumour effect of resveratrol may include stimulation of the miR-663 and miR-744 expression.
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El'skaya AV, Negrutskii BS, Shalak VF, Vislovukh AA, Vlasenko DO, Novosylna AV, Lukash TO, Veremieva MV. Specific features of protein biosynthesis in higher eukaryotes. ACTA ACUST UNITED AC 2013. [DOI: 10.7124/bc.000818] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- A. V. El'skaya
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine
| | - B. S. Negrutskii
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine
| | - V. F. Shalak
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine
| | - A. A. Vislovukh
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine
| | - D. O. Vlasenko
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine
| | - A. V. Novosylna
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine
| | - T. O. Lukash
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine
| | - M. V. Veremieva
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine
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Degradation of newly synthesized polypeptides by ribosome-associated RACK1/c-Jun N-terminal kinase/eukaryotic elongation factor 1A2 complex. Mol Cell Biol 2013; 33:2510-26. [PMID: 23608534 DOI: 10.1128/mcb.01362-12] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Folding of newly synthesized polypeptides (NSPs) into functional proteins is a highly regulated process. Rigorous quality control ensures that NSPs attain their native fold during or shortly after completion of translation. Nonetheless, signaling pathways that govern the degradation of NSPs in mammals remain elusive. We demonstrate that the stress-induced c-Jun N-terminal kinase (JNK) is recruited to ribosomes by the receptor for activated protein C kinase 1 (RACK1). RACK1 is an integral component of the 40S ribosome and an adaptor for protein kinases. Ribosome-associated JNK phosphorylates the eukaryotic translation elongation factor 1A isoform 2 (eEF1A2) on serines 205 and 358 to promote degradation of NSPs by the proteasome. These findings establish a role for a RACK1/JNK/eEF1A2 complex in the quality control of NSPs in response to stress.
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Lee MH, Choi BY, Cho YY, Lee SY, Huang Z, Kundu JK, Kim MO, Kim DJ, Bode AM, Surh YJ, Dong Z. Tumor suppressor p16(INK4a) inhibits cancer cell growth by downregulating eEF1A2 through a direct interaction. J Cell Sci 2013; 126:1744-52. [PMID: 23444377 DOI: 10.1242/jcs.113613] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The tumor suppressor protein p16(INK4a) is a member of the INK4 family of cyclin-dependent kinase (Cdk) inhibitors, which are involved in the regulation of the eukaryotic cell cycle. However, the mechanisms underlying the anti-proliferative effects of p16(INK4a) have not been fully elucidated. Using yeast two-hybrid screening, we identified the eukaryotic elongation factor (eEF)1A2 as a novel interacting partner of p16(INK4a). eEF1A2 is thought to function as an oncogene in cancers. The p16(INK4a) protein interacted with all but the D2 (250-327 aa) domain of eEF1A2. Ectopic expression of p16(INK4a) decreased the expression of eEF1A2 and inhibited cancer cell growth. Furthermore, suppression of protein synthesis by expression of p16(INK4a) ex vivo was verified by luciferase reporter activity. Microinjection of p16(INK4a) mRNA into the cytoplasm of Xenopus embryos suppressed the luciferase mRNA translation, whereas the combination of p16(INK4a) and morpholino-eEF1A2 resulted in a further reduction in translational activity. We conclude that the interaction of p16(INK4a) with eEF1A2, and subsequent downregulation of the expression and function of eEF1A2 is a novel mechanism explaining the anti-proliferative effects of p16(INK4a).
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Affiliation(s)
- Mee-Hyun Lee
- The Hormel Institute, University of Minnesota, MN 55912, USA
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AGR2 expression in ovarian tumours: a potential biomarker for endometrioid and mucinous differentiation. Pathology 2013; 45:49-54. [DOI: 10.1097/pat.0b013e32835bd561] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Xie T, d’ Ario G, Lamb JR, Martin E, Wang K, Tejpar S, Delorenzi M, Bosman FT, Roth AD, Yan P, Bougel S, Di Narzo AF, Popovici V, Budinská E, Mao M, Weinrich SL, Rejto PA, Hodgson JG. A comprehensive characterization of genome-wide copy number aberrations in colorectal cancer reveals novel oncogenes and patterns of alterations. PLoS One 2012; 7:e42001. [PMID: 22860045 PMCID: PMC3409212 DOI: 10.1371/journal.pone.0042001] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 06/28/2012] [Indexed: 12/18/2022] Open
Abstract
To develop a comprehensive overview of copy number aberrations (CNAs) in stage-II/III colorectal cancer (CRC), we characterized 302 tumors from the PETACC-3 clinical trial. Microsatellite-stable (MSS) samples (n = 269) had 66 minimal common CNA regions, with frequent gains on 20 q (72.5%), 7 (41.8%), 8 q (33.1%) and 13 q (51.0%) and losses on 18 (58.6%), 4 q (26%) and 21 q (21.6%). MSS tumors have significantly more CNAs than microsatellite-instable (MSI) tumors: within the MSI tumors a novel deletion of the tumor suppressor WWOX at 16 q23.1 was identified (p<0.01). Focal aberrations identified by the GISTIC method confirmed amplifications of oncogenes including EGFR, ERBB2, CCND1, MET, and MYC, and deletions of tumor suppressors including TP53, APC, and SMAD4, and gene expression was highly concordant with copy number aberration for these genes. Novel amplicons included putative oncogenes such as WNK1 and HNF4A, which also showed high concordance between copy number and expression. Survival analysis associated a specific patient segment featured by chromosome 20 q gains to an improved overall survival, which might be due to higher expression of genes such as EEF1B2 and PTK6. The CNA clustering also grouped tumors characterized by a poor prognosis BRAF-mutant-like signature derived from mRNA data from this cohort. We further revealed non-random correlation between CNAs among unlinked loci, including positive correlation between 20 q gain and 8 q gain, and 20 q gain and chromosome 18 loss, consistent with co-selection of these CNAs. These results reinforce the non-random nature of somatic CNAs in stage-II/III CRC and highlight loci and genes that may play an important role in driving the development and outcome of this disease.
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Affiliation(s)
- Tao Xie
- Oncology Research, Pfizer Worldwide Research and Development, San Diego, California, United States of America
- * E-mail: (TX); (JGH)
| | | | - John R. Lamb
- Oncology Research, Pfizer Worldwide Research and Development, San Diego, California, United States of America
| | - Eric Martin
- Oncology Research, Pfizer Worldwide Research and Development, San Diego, California, United States of America
| | - Kai Wang
- Oncology Research, Pfizer Worldwide Research and Development, San Diego, California, United States of America
| | - Sabine Tejpar
- University Hospital Gasthuisberg, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Mauro Delorenzi
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
- Lausanne University Medical Center, Lausanne, Switzerland
| | - Fred T. Bosman
- Lausanne University Medical Center, Lausanne, Switzerland
| | | | - Pu Yan
- Lausanne University Medical Center, Lausanne, Switzerland
| | | | | | - Vlad Popovici
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Eva Budinská
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Mao Mao
- Oncology Research, Pfizer Worldwide Research and Development, San Diego, California, United States of America
| | - Scott L. Weinrich
- Oncology Research, Pfizer Worldwide Research and Development, San Diego, California, United States of America
| | - Paul A. Rejto
- Oncology Research, Pfizer Worldwide Research and Development, San Diego, California, United States of America
| | - J. Graeme Hodgson
- Oncology Research, Pfizer Worldwide Research and Development, San Diego, California, United States of America
- * E-mail: (TX); (JGH)
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Negrutskii B, Vlasenko D, El'skaya A. From global phosphoproteomics to individual proteins: the case of translation elongation factor eEF1A. Expert Rev Proteomics 2012; 9:71-83. [PMID: 22292825 DOI: 10.1586/epr.11.71] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Phosphoproteomics is often aimed at deciphering the modified components of signaling pathways in certain organisms, tissues and pathologies. Phosphorylation of housekeeping proteins, albeit important, usually attracts less attention. Here, we provide targeted analysis of eukaryotic translation elongation factor 1A (eEF1A), which is the main element of peptide elongation machinery. There are 97% homologous A1 and A2 isoforms of eEF1A; their expression in mammalian tissues is mutually exclusive and differentially regulated in development. The A2 isoform reveals proto-oncogenic properties and specifically interacts with some cellular proteins. Several tyrosine residues shown experimentally to be phosphorylated in eEF1A1 are hardly solution accessible, so their phosphorylation could be linked with structural rearrangement of the protein molecule. The possible role of tyrosine phosphorylation in providing the background for structural differences between the 'extended' A1 isoform and the compact oncogenic A2 isoform is discussed. The 'road map' for targeted analysis of any protein of interest using phosphoproteomics data is presented.
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Affiliation(s)
- Boris Negrutskii
- Institute of Molecular Biology & Genetics, National Academy of Sciences of Ukraine, Kiev, 03680, Ukraine.
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Vui-Kee K, Mohd Dali AZH, Mohamed Rose I, Ghazali R, Jamal R, Mokhtar NM. Molecular markers associated with nonepithelial ovarian cancer in formalin-fixed, paraffin-embedded specimens by genome wide expression profiling. Kaohsiung J Med Sci 2012; 28:243-50. [PMID: 22531302 DOI: 10.1016/j.kjms.2011.11.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Accepted: 07/11/2011] [Indexed: 01/05/2023] Open
Abstract
Nonepithelial ovarian cancer (NEOC) is a rare cancer that is often misdiagnosed as other malignant tumors. Research on this cancer using fresh tissues is nearly impossible because of its limited number of samples within a limited time provided. The study is to identify potential genes and their molecular pathways related to NEOC using formalin-fixed paraffin embedded samples. Total RNA was extracted from eight archived NEOCs and seven normal ovaries. The RNA samples with RNA integrity number >2.0, purity >1.7 and cycle count value <28 cycles were hybridized to the Illumina Whole-Genome DASL assay (cDNA-mediated annealing, selection, extension, and ligation). We analyzed the results using the GeneSpring GX11.0 and FlexArray software to determine the differentially expressed genes. Microarray results were validated using an immunohistochemistry method. Statistical analysis identified 804 differentially expressed genes with 443 and 361 genes as overexpressed and underexpressed in cancer, respectively. Consistent findings were documented for the overexpression of eukaryotic translation elongation factor 1 alpha 1, E2F transcription factor 2, and fibroblast growth factor receptor 3, except for the down-regulated gene, early growth response 1 (EGR1). The immunopositivity staining for EGR1 was found in the majority of cancer tissues. This finding suggested that the mRNA level of a transcript did not always match with the protein expression in tissues. The current gene profile can be the platform for further exploration of the molecular mechanism of NEOC.
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Affiliation(s)
- Koon Vui-Kee
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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Correa RJM, Peart T, Valdes YR, DiMattia GE, Shepherd TG. Modulation of AKT activity is associated with reversible dormancy in ascites-derived epithelial ovarian cancer spheroids. Carcinogenesis 2011; 33:49-58. [PMID: 22045027 DOI: 10.1093/carcin/bgr241] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Epithelial ovarian cancer (EOC) metastasis is a direct contributor to high recurrence and low survival for patients with this disease. Metastasis in EOC occurs by cell exfoliation from the primary tumor into the fluid-filled peritoneal cavity, persistence of these cells as non-adherent multicellular aggregates or spheroids and reattachment of spheroids to form secondary lesions. We have recovered native spheroids from ascites fluid and demonstrated that EOC cells within these structures exhibit reduced proliferation, yet regain the capacity to attach and reinitiate cell division. To model this process in vitro for further investigation, primary EOC cells from patient peritoneal fluid were cultured under non-adherent conditions. Here we show that these cells naturally form spheroids resembling those observed in ascites. Spheroids exhibit reduced cell proliferation and a protein expression pattern consistent with cellular quiescence: specifically, decreased phospho-AKT and p45/SKP2 with a concomitant increase in p130/RBL2 and p27(Kip1). However, when spheroids are seeded to an adherent surface, reattachment occurs rapidly and is followed by reinitiation of AKT-dependent cell proliferation. These results were strikingly consistent among numerous clinical specimens and were corroborated in the EOC cell line OVCAR3. Therefore, our data reveal that EOC cells become quiescent when forming spheroids, but reactivate proliferative mechanisms upon attachment to a permissive substratum. Overall, this work utilizes a novel in vitro model of EOC metastasis that employs primary human EOC cells and introduces the important concept of reversible dormancy in EOC pathogenesis.
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Affiliation(s)
- Rohann J M Correa
- Translational Ovarian Cancer Research Program, London Regional Cancer Program, 790 Commissioners Road East, London, Ontario, Canada
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Pinke DE, Lee JM. The lipid kinase PI4KIIIβ and the eEF1A2 oncogene co-operate to disrupt three-dimensional in vitro acinar morphogenesis. Exp Cell Res 2011; 317:2503-11. [PMID: 21851817 DOI: 10.1016/j.yexcr.2011.08.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 07/29/2011] [Accepted: 08/01/2011] [Indexed: 11/25/2022]
Abstract
The study of in vitro morphogenesis is fundamental to understanding neoplasia since the dysregulation of morphogenic pathways that create multi-cellular organisms is a common hallmark of oncogenesis. The in vitro culture of human breast epithelial cells on reconstituted basement membranes recapitulate some features of in vivo breast development, including the formation of a three-dimensional structure termed an acinus. Importantly, the capacity to disrupt in vitro acinar morphogenesis is a common property of human breast oncogenes. In this report, we find that phosphatidylinositol 4-kinase IIIβ (PI4KIIIβ), a lipid kinase that phosphorylates phosphatidylinositol (PI) to PI(4)P, disrupts in vitro mammary acinar formation. The PI4KIIIβ protein localizes to the basal surface of acini created by human MCF10A cells and ectopic expression of PI4KIIIβ induces multi-acinar devlopment. Furthermore, expression of an oncogenic PI4KIIIβ activator, eEF1A2 (eukaryotic elongation factor 1 alpha 2), phenocopies the PI4KIIIβ multi-acinar phenotype. Ectopic expression of PI4KIIIβ or eEF1A2 alters the localization of PI(4)P and PI(4,5)P(2) within acini, indicating the importance of these lipids in acinar development. Our work shows that PI4KIIIβ, eEF1A2 and PI(4)P likely play an important role in mammary neoplasia and acinar development.
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Affiliation(s)
- Dixie E Pinke
- Department of Biochemistry, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H 8M5
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Chen CY, Fang HY, Chiou SH, Yi SE, Huang CY, Chiang SF, Chang HW, Lin TY, Chiang IP, Chow KC. Sumoylation of eukaryotic elongation factor 2 is vital for protein stability and anti-apoptotic activity in lung adenocarcinoma cells. Cancer Sci 2011; 102:1582-9. [PMID: 21554491 PMCID: PMC11159786 DOI: 10.1111/j.1349-7006.2011.01975.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
By screening mouse monoclonal antibody libraries for Kelch repeats, we serendipitously identified monoclonal antibodies to eukaryotic elongation factor 2 (eEF2). Interestingly, eEF2 was highly expressed in lung adenocarcinoma (LADC), but not in the neighboring non-tumor lung tissue. Normally, eEF2 is involved in the peptidyl-tRNA translocation during protein synthesis. Overexpression of eEF2 would implicate an association with disease progression of LADC. In the present study, we investigated the prognostic significance of eEF2 in patients with LADC. Expression of eEF2 was detected by immunoblotting, immunohistochemistry and confocal immunofluorescence microscopy. Our results show that patients with high eEF2 expression had a significantly higher incidence of early tumor recurrence (67.8%vs 18.2%, P = 0.016), and a significantly worse prognosis (P < 0.001). In an in vitro study, silencing of eEF2 expression increased mitochondrial elongation, cellular autophagy and cisplatin sensitivity. Moreover, eEF2 was sumoylated in LADC cells, and eEF2 sumoylation correlated with drug resistance. These results suggest that eEF2 is an anti-apoptotic marker in LADC. However, biological function and involvement of eEF2 in the disease progression of LADC require further studies.
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Affiliation(s)
- Chih-Yi Chen
- Department of Surgery, Comprehensive Cancer Center, China Medical University Hospital, Taichung, China
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The good oncogene: When bad genes identify good outcome in cancer. Med Hypotheses 2010; 76:259-63. [PMID: 21050670 DOI: 10.1016/j.mehy.2010.10.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Revised: 10/06/2010] [Accepted: 10/10/2010] [Indexed: 02/07/2023]
Abstract
Some cancer patients live many decades after diagnosis while others are not so fortunate. Understanding why this occurs is a fundamental issue in cancer research. We hypothesize that among the factors controlling favorable outcome are a class of genes that we describe as "good oncogenes". These genes have a paradoxical function in cancer in that they are prognostic markers for favorable survival but have strong transforming and tumour-promoting properties. As such, good oncogenes both promote neoplasia and constrain it. We propose that good oncogenes enhance outcome probability by allowing early tumor detection, sensitizing cancer cells to senescence or by attenuating metastatic progression and tumour self-renewal. We believe that understanding the signaling pathways regulated by good oncogenes provides mechanistic insight into the biochemical basis for long-term survival in cancer.
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Van Goietsenoven G, Hutton J, Becker JP, Lallemand B, Robert F, Lefranc F, Pirker C, Vandenbussche G, Van Antwerpen P, Evidente A, Berger W, Prévost M, Pelletier J, Kiss R, Kinzy TG, Kornienko A, Mathieu V. Targeting of eEF1A with Amaryllidaceae isocarbostyrils as a strategy to combat melanomas. FASEB J 2010; 24:4575-84. [PMID: 20643906 DOI: 10.1096/fj.10-162263] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Melanomas display poor response rates to adjuvant therapies because of their intrinsic resistance to proapoptotic stimuli. This study indicates that such resistance can be overcome, at least partly, through the targeting of eEF1A elongation factor with narciclasine, an Amaryllidaceae isocarbostyril controlling plant growth. Narciclasine displays IC(50) growth inhibitory values between 30-100 nM in melanoma cell lines, irrespective of their levels of resistance to proapoptotic stimuli. Normal noncancerous cell lines are much less affected. At nontoxic doses, narciclasine also significantly improves (P=0.004) the survival of mice bearing metastatic apoptosis-resistant melanoma xenografts in their brain. The eEF1A targeting with narciclasine (50 nM) leads to 1) marked actin cytoskeleton disorganization, resulting in cytokinesis impairment, and 2) protein synthesis impairment (elongation and initiation steps), whereas apoptosis is induced at higher doses only (≥200 nM). In addition to molecular docking validation and identification of potential binding sites, we biochemically confirmed that narciclasine directly binds to human recombinant and yeast-purified eEF1A in a nanomolar range, but not to actin or elongation factor 2, and that 5 nM narciclasine is sufficient to impair eEF1A-related actin bundling activity. eEF1A is thus a potential target to combat melanomas regardless of their apoptosis-sensitivity, and this finding reconciles the pleiotropic cytostatic of narciclasine. -
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Abstract
The first evidence for the role of the protein elongation factor eEF1A2 in tumorigenesis was reported by Anand and colleagues who demonstrated that eEF1A2 is overexpressed in about 30% of ovarian tumors and some established ovarian cancer cells. This abnormal expression correlates with a poor prognosis. Since this discovery, there have been several reports suggesting eEF1A2 as a diagnostic marker in various cancers. This review highlights the oncogenic potential of eEF1A2.
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Affiliation(s)
- Mee-Hyun Lee
- National Research Laboratory of Molecular Carcinogenesis and Chemoprevention, College of Pharmacy and Cancer Research Institute, Seoul National University, Seoul, Korea
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von Figura G, Hartmann D, Song Z, Rudolph KL. Role of telomere dysfunction in aging and its detection by biomarkers. J Mol Med (Berl) 2009; 87:1165-71. [PMID: 19669107 DOI: 10.1007/s00109-009-0509-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2009] [Revised: 07/07/2009] [Accepted: 07/17/2009] [Indexed: 01/27/2023]
Abstract
Aging is a complex process that has been shown to be linked to accumulation of DNA damage. Telomere shortening represents a cell-intrinsic mechanism leading to DNA damage accumulation and activation of DNA damage checkpoints in aging cells. Activation of DNA damage checkpoints in response to telomere dysfunction results in induction of cellular senescence-a permanent cell cycle arrest. Senescence represents a tumor suppressor mechanism protecting cells from evolution of genomic instability and transformation. As a drawback, telomere shortening may also limit tissue renewal and regenerative capacity of tissues in response to aging and chronic disease. In aged organs, telomere shortening may also increase the cancer risk by initiation of chromosomal instability, loss of proliferative competition of aging stem cells, and selection of aberrant growing clones. Consequently, aged individuals are more susceptible and vulnerable to various diseases and show an increased cancer risk. Recently, proteins were discovered, which are induced by telomere dysfunction and DNA damage. It was shown that these proteins represent new biomarkers of human aging and disease. Here, we review the scientific background and experimental data on these newly discovered biomarkers.
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Affiliation(s)
- Guido von Figura
- Department of Molecular Medicine and Max-Planck-Research Group on Stem Cell Aging, University of Ulm, 89081 Ulm, Germany
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Farina A, Dumonceau JM, Frossard JL, Hadengue A, Hochstrasser DF, Lescuyer P. Proteomic analysis of human bile from malignant biliary stenosis induced by pancreatic cancer. J Proteome Res 2009; 8:159-69. [PMID: 19055478 DOI: 10.1021/pr8004925] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Stenosis of the common bile duct may be either due to benign (chronic pancreatitis) or malignant (cholangiocarcinoma, pancreatic adenocarcinoma) conditions. The benign nature of the stricture should be first confirmed in order to ensure appropriate therapy. Therefore, the identification of markers allowing discrimination between malignant and benign biliary stenosis would be very valuable in clinical practice. To this intent, we performed a proteomic analysis of bile samples from patients having a biliary stenosis caused by pancreatic adenocarcinoma. Bile samples were collected during endoscopic retrograde cholangiopancreatography and purified using different methods. The extracted proteins were then analyzed by SDS-PAGE and LC-MS/MS. A total of 127 proteins were identified, 34 of which have not been previously detected in proteomic studies of bile. Among them, several proteins have been described as potential biomarkers of pancreatic cancer. We extended our investigation by studying the expression of some of these pancreatic cancer markers in bile samples collected from patients with various etiologies of biliary stenosis including pancreatic cancer, cholangiocarcinoma, chronic pancreatitis, as well as gallstone-induced stenosis. Our data showed a conspicuous overexpression of CEACAM6 and MUC1 (CA19-9) in pancreatic cancer and cholangiocarcinoma samples, according to the hypothesis that bile fluid collects cancer-associated protein leaking from the tumor microenvironment. These results underline the interest of using bile as a source of biomarkers for the diagnosis of malignant biliary stenosis.
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Affiliation(s)
- Annarita Farina
- Biomedical Proteomics Research Group, Department of Bioinformatics and Structural Biology, Faculty of Medicine, Geneva University, Geneva CH-1211, Switzerland.
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