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Li J, Wang X, Liu R, Zi J, Li Y, Li Z, Xiong W. Lysyl Oxidase (LOX) Family Proteins: Key Players in Breast Cancer Occurrence and Progression. J Cancer 2024; 15:5230-5243. [PMID: 39247609 PMCID: PMC11375560 DOI: 10.7150/jca.98688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Accepted: 07/28/2024] [Indexed: 09/10/2024] Open
Abstract
The lysyl oxidase (LOX) family proteins are secreted copper-dependent amine oxidases, comprised of five paralogues: LOX and LOX-like 1-4 (LOXL1-4), which are characterized by catalytic activity contributing to the remodeling of the cross-linking of the structural extracellular matrix (ECM). ECM remodeling plays a key role in the angiogenesis surrounding tumours, whereby a corrupt tumour microenvironment (TME) takes shape. Additionally, dysregulation and aberrant expression of LOX family proteins have been implicated in the occurrence and progression of various types of human cancers, including lung cancer, hepatocellular carcinoma, gastric cancer, renal cell carcinoma, and colorectal cancer. Breast cancer is the most prevalent malignant tumour in women worldwide, and its incidence rate is increasing annually. In recent years, a growing body of evidence has revealed significant upregulation of LOX family proteins in breast cancer, which contributes to cancer cell proliferation, invasion, and metastasis. Furthermore, elevated expression of LOX family proteins is closely associated with poor prognosis in breast cancer patients. We herein review the structure, regulation, function, and mechanisms of LOX family proteins in the occurrence and progression of breast cancer. In addition, we highlight recent insights into their mechanisms and their potential involvement in the clinical value and novel biological roles of LOX family members in tumour progression and the TME of breast cancer. This review will provide a theoretical basis and reference for clinical diagnosis and treatment of breast cancer, as well as for the screening of effective LOX-specific inhibitors.
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Affiliation(s)
- Jinsong Li
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Dali University, Dali 671000, Yunnan, China
- Key Laboratory of Clinical Biochemistry Testing in Universities of Yunnan Province, College of Basic Medical Sciences, Dali University, Dali 671000, Yunnan, China
| | - Xinmeng Wang
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Dali University, Dali 671000, Yunnan, China
- Key Laboratory of Clinical Biochemistry Testing in Universities of Yunnan Province, College of Basic Medical Sciences, Dali University, Dali 671000, Yunnan, China
| | - Ruai Liu
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Dali University, Dali 671000, Yunnan, China
- Key Laboratory of Clinical Biochemistry Testing in Universities of Yunnan Province, College of Basic Medical Sciences, Dali University, Dali 671000, Yunnan, China
| | - Jiaji Zi
- Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R&D, College of Pharmacy, Dali University, Dali 671000, Yunnan, China
| | - Yihan Li
- Department of Radiology, The First Affiliated Hospital of Dali University, Dali University, Dali 671000, Yunnan, China
| | - Zhengliang Li
- Department of Radiology, The First Affiliated Hospital of Dali University, Dali University, Dali 671000, Yunnan, China
| | - Wei Xiong
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Dali University, Dali 671000, Yunnan, China
- Key Laboratory of Clinical Biochemistry Testing in Universities of Yunnan Province, College of Basic Medical Sciences, Dali University, Dali 671000, Yunnan, China
- Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R&D, College of Pharmacy, Dali University, Dali 671000, Yunnan, China
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Cao B, Chen X, Li Y, Zhou T, Chen N, Guo Y, Zhao M, Guo C, Shi Y, Wang Q, Du X, Zhang L, Li Y. PDCD4 triggers α-synuclein accumulation and motor deficits via co-suppressing TFE3 and TFEB translation in a model of Parkinson's disease. NPJ Parkinsons Dis 2024; 10:146. [PMID: 39107320 PMCID: PMC11303393 DOI: 10.1038/s41531-024-00760-9] [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: 01/24/2024] [Accepted: 07/24/2024] [Indexed: 08/10/2024] Open
Abstract
TFE3 and TFEB, as the master regulators of lysosome biogenesis and autophagy, are well characterized to enhance the synaptic protein α-synuclein degradation in protecting against Parkinson's disease (PD) and their levels are significantly decreased in the brain of PD patients. However, how TFE3 and TFEB are regulated during PD pathogenesis remains largely vague. Herein, we identified that programmed cell death 4 (PDCD4) promoted pathologic α-synuclein accumulation to facilitate PD development via suppressing both TFE3 and TFEB translation. Conversely, PDCD4 deficiency significantly augmented global and nuclear TFE3 and TFEB distributions to alleviate neurodegeneration in a mouse model of PD with overexpressing α-synuclein in the striatum. Mechanistically, like TFEB as we reported before, PDCD4 also suppressed TFE3 translation, rather than influencing its transcription and protein stability, to restrain its nuclear translocation and lysosomal functions, eventually leading to α-synuclein aggregation. We proved that the two MA3 domains of PDCD4 mediated the translational suppression of TFE3 through binding to its 5'-UTR of mRNA in an eIF-4A dependent manner. Based on this, we developed a blood-brain barrier penetrating RVG polypeptide modified small RNA drug against pdcd4 to efficiently prevent α-synuclein neurodegeneration in improving PD symptoms by intraperitoneal injections. Together, we suggest PDCD4 as a PD-risk protein to facilitate α-synuclein neurodegeneration via suppressing TFE3 and TFEB translation and further provide a potential small RNA drug against pdcd4 to treat PD by intraperitoneal injections.
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Affiliation(s)
- Baihui Cao
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xiaotong Chen
- Department of Immunology, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Yubin Li
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Tian Zhou
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Nuo Chen
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yaxin Guo
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ming Zhao
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Chun Guo
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yongyu Shi
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qun Wang
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xuexiang Du
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Lining Zhang
- Department of Immunology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China.
| | - Yan Li
- Department of Pathogen Biology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, China.
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Eshraghi R, Rafiei M, Hadian Jazi Z, Shafie D, Raisi A, Mirzaei H. MicroRNA-155 and exosomal microRNA-155: Small pieces in the cardiovascular diseases puzzle. Pathol Res Pract 2024; 257:155274. [PMID: 38626659 DOI: 10.1016/j.prp.2024.155274] [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: 02/14/2024] [Revised: 03/23/2024] [Accepted: 03/26/2024] [Indexed: 04/18/2024]
Abstract
MicroRNAs (miRs, miRNAs) are known to have a part in various human illnesses, such as those related to the heart. One particular miRNA, miR-155, has been extensively studied and has been found to be involved in hematopoietic lineage differentiation, immunity, viral infections, inflammation, as well as vascular remodeling. These processes have all been connected to cardiovascular diseases, including heart failure, diabetic heart disease, coronary artery disease, and abdominal aortic aneurysm. The impacts of miR-155 depend on the type of cell it is acting on and the specific target genes involved, resulting in different mechanisms of disease. Although, the exact part of miR-155 in cardiovascular illnesses is yet not fully comprehended, as some studies have shown it to promote the development of atherosclerosis while others have shown it to prevent it. As a result, to comprehend the underlying processes of miR-155 in cardiovascular disorders, further thorough study is required. It has been discovered that exosomes that could be absorbed by adjacent or distant cells, control post-transcriptional regulation of gene expression by focusing on mRNA. Exosomal miRNAs have been found to have a range of functions, including participating in inflammatory reactions, cell movement, growth, death, autophagy, as well as epithelial-mesenchymal transition. An increasing amount of research indicates that exosomal miRNAs are important for cardiovascular health and have a major role in the development of a number of cardiovascular disorders, including pulmonary hypertension, atherosclerosis, acute coronary syndrome, heart failure, and myocardial ischemia-reperfusion injury. Herein the role of miR-155 and its exosomal form in heart diseases are summarized.
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Affiliation(s)
- Reza Eshraghi
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran.
| | - Moein Rafiei
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Zahra Hadian Jazi
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Davood Shafie
- Cardiology/Heart Failure and Transplantation, Heart Failure Research Center, Isfahan Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Arash Raisi
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Hamed Mirzaei
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.
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Zheng Y, Sukocheva O, Tse E, Neganova M, Aleksandrova Y, Zhao R, Chubarev V, Fan R, Liu J. MicroRNA-183 cluster: a promising biomarker and therapeutic target in gastrointestinal malignancies. Am J Cancer Res 2023; 13:6147-6175. [PMID: 38187051 PMCID: PMC10767355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 11/29/2023] [Indexed: 01/09/2024] Open
Abstract
Small non-coding RNAs (microRNA, miR), powerful epigenetic regulators, were found involved in the regulation of most biological functions via post-translational inhibition of protein expression. Increased expression of pro-oncogenic miRs (known as miR cancer biomarkers) and inhibition of pro-apoptotic miR expression have been demonstrated in different tumors. The recently identified miR-183 was found implicated in gastrointestinal tumor metabolism regulation. Elevated miR-183 expression and cancer-promoting effects were reported in esophageal and colorectal cancers, which was partially contradicted by controversial data observed in gastric cancers. Anti-cancer effect of miR-183 in gastric cancer cells was associated with the Bim-1 and Ezrin genes regulation. Many studies indicated that miR-183 can inhibit tumor suppressor genes in most cell lines, promoting tumor cell proliferation and migration. Increased miR-183 level results in the downregulation of FOXO1, PDCD4, and other tumor suppressor genes in gastrointestinal tumor cells. MiR-183 also influences the signaling of PI3K/AKT/mTOR, Wnt/β-catenin, and Bcl-2/p53 signaling pathways. Mir-183 inhibits apoptosis and autophagy, and promotes epithelial-to-mesenchymal transition, cancer cell proliferation, and migration. Accordingly, gastrointestinal cancer occurrence, development of chemoradiotherapy resistance, recurrence/metastasis, and prognosis were associated with miR-183 expression. The current study assessed reported miR-183 functions and signaling, providing new insights for the diagnosis and treatment of gastrointestinal malignancies.
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Affiliation(s)
- Yufei Zheng
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052, Henan, China
| | - Olga Sukocheva
- Department of Hepatology, Royal Adelaide HospitalAdelaide, SA 5000, Australia
| | - Edmund Tse
- Department of Hepatology, Royal Adelaide HospitalAdelaide, SA 5000, Australia
| | - Margarita Neganova
- Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of SciencesSevernij Pr. 1, Chernogolovka 142432, Russia
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of SciencesAkad. Arbuzov St. 8, Kazan 420088, Russia
| | - Yulia Aleksandrova
- Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of SciencesSevernij Pr. 1, Chernogolovka 142432, Russia
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of SciencesAkad. Arbuzov St. 8, Kazan 420088, Russia
| | - Ruiwen Zhao
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052, Henan, China
| | - Vladimir Chubarev
- Sechenov First Moscow State Medical University (Sechenov University)8-2 Trubetskaya St., Moscow 119991, Russia
| | - Ruitai Fan
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052, Henan, China
| | - Junqi Liu
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052, Henan, China
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Wang YX, Cui L, Wu WB, Quinn MJ, Menon R, Zhao JR, Zhang HJ. Downregulation of PDCD4 by deSUMOylation associates with the progression of gestational trophoblastic disease. Placenta 2022; 130:17-24. [PMID: 36370491 DOI: 10.1016/j.placenta.2022.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 10/17/2022] [Accepted: 10/29/2022] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Gestational trophoblastic disease (GTD) encompasses a range of trophoblastic disorders from hydatidiform mole (HM), to malignant gestational trophoblastic neoplasia (GTN). The exact molecular mechanisms of GTN remain unknown. Dysregulation and dysfunction of programmed cell death 4 (PDCD4)have been observed in many cancers. The roles of PDCD4 in GTD have not been previously reported. METHODS A total of 161 cases of formalin-fixed, paraffin-embedded trophoblast blocks, and 36 cases of fresh trophoblast tissues were collected, including normal first trimester placentas, HM, and invasive HM. Choriocarcinoma cells JAR and JEG-3 were employed. The expressions of PDCD4 and small ubiquitin-like modifier 2/3 (SUMO2/3) were examined by immunohistochemistry, quantitative reverse transcription PCR and Western blotting in trophoblastic tissues and cells. The relationship between SUMOylation and PDCD4 was investigated. The effects of PDCD4 on proliferation, invasion, and migration of choriocarcinoma cells were evaluated by Cell Counting Kit-8 and transwell assays post siRNA transfection. Extracellular Matrix & Adhesion Profiler PCR Array was used to screen the downstream molecules of PDCD4. RESULTS PDCD4 was significantly repressed in HM tissues. Loss of PDCD4 expression was demonstrated in 90% invasive HMs. Choriocarcinoma cells also displayed with suppressed PDCD4 expression. The varied expression of PDCD4 was paralleled by SUMO2/3. Inhibition of SUMOylation reduced the expression of PDCD4. Silencing of PDCD4promoted proliferation/migration/invasion, upregulatedMMP3/MMP8/ITGB2, and downregulated TIMP1/TIMP2 in choriocarcinoma cells. DISCUSSION Our results suggest that reduced SUMOylation is one reason for suppressed PDCD4 in GTD. Loss of PDCD4 likely determines the malignant phenotype of GTN by dysregulating some members of the MMPs/TIMPs/integrins complex.
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Affiliation(s)
- Ya-Xin Wang
- Departments of Pathology, International Peace Maternity and Child Health Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China; Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Ling Cui
- Departments of Pathology, International Peace Maternity and Child Health Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China
| | - Wei-Bin Wu
- Department of Biobank, International Peace Maternity and Child Health Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China
| | - Martin John Quinn
- Departments of Pathology, International Peace Maternity and Child Health Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China
| | - Ramkumar Menon
- Division of Basic and Translational Research, Department of Obstetrics and Gynaecology, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
| | - Jiu-Ru Zhao
- Department of Biobank, International Peace Maternity and Child Health Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
| | - Hui-Juan Zhang
- Departments of Pathology, International Peace Maternity and Child Health Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
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Clemente-González C, Carnero A. Role of the Hypoxic-Secretome in Seed and Soil Metastatic Preparation. Cancers (Basel) 2022; 14:5930. [PMID: 36497411 PMCID: PMC9738438 DOI: 10.3390/cancers14235930] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/18/2022] [Accepted: 11/28/2022] [Indexed: 12/05/2022] Open
Abstract
During tumor growth, the delivery of oxygen to cells is impaired due to aberrant or absent vasculature. This causes an adaptative response that activates the expression of genes that control several essential processes, such as glycolysis, neovascularization, immune suppression, and the cancer stemness phenotype, leading to increased metastasis and resistance to therapy. Hypoxic tumor cells also respond to an altered hypoxic microenvironment by secreting vesicles, factors, cytokines and nucleic acids that modify not only the immediate microenvironment but also organs at distant sites, allowing or facilitating the attachment and growth of tumor cells and contributing to metastasis. Hypoxia induces the release of molecules of different biochemical natures, either secreted or inside extracellular vesicles, and both tumor cells and stromal cells are involved in this process. The mechanisms by which these signals that can modify the premetastatic niche are sent from the primary tumor site include changes in the extracellular matrix, recruitment and activation of different stromal cells and immune or nonimmune cells, metabolic reprogramming, and molecular signaling network rewiring. In this review, we will discuss how hypoxia might alter the premetastatic niche through different signaling molecules.
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Affiliation(s)
- Cynthia Clemente-González
- Instituto de Biomedicina de Sevilla (IBIS), Consejo Superior de Investigaciones Científicas, Hospital Universitario Virgen del Rocío (HUVR), Universidad de Sevilla, 41013 Seville, Spain
- CIBERONC (Centro de Investigación Biomédica en Red Cáncer), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Amancio Carnero
- Instituto de Biomedicina de Sevilla (IBIS), Consejo Superior de Investigaciones Científicas, Hospital Universitario Virgen del Rocío (HUVR), Universidad de Sevilla, 41013 Seville, Spain
- CIBERONC (Centro de Investigación Biomédica en Red Cáncer), Instituto de Salud Carlos III, 28029 Madrid, Spain
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Cai Q, Yang HS, Li YC, Zhu J. Dissecting the Roles of PDCD4 in Breast Cancer. Front Oncol 2022; 12:855807. [PMID: 35795053 PMCID: PMC9251513 DOI: 10.3389/fonc.2022.855807] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 05/12/2022] [Indexed: 11/29/2022] Open
Abstract
The human programmed cell death 4 (PDCD4) gene was mapped at chromosome 10q24 and encodes the PDCD4 protein comprised of 469 amino acids. PDCD4 inhibits protein translation PDCD4 inhibits protein translation to suppress tumor progression, and its expression is frequently decreased in breast cancer. PDCD4 blocks translation initiation complex by binding eIF4A via MA-3 domains or by directly binding 5’ mRNA internal ribosome entry sites with an RNA binding domain to suppress breast cancer progression and proliferation. Numerous regulators and biological processes including non-coding RNAs, proteasomes, estrogen, natural compounds and inflammation control PDCD4 expression in breast cancer. Loss of PDCD4 expression is also responsible for drug resistance in breast cancer. HER2 activation downregulates PDCD4 expression by activating MAPK, AKT, and miR-21 in aromatase inhibitor-resistant breast cancer cells. Moreover, modulating the microRNA/PDCD4 axis maybe an effective strategy for overcoming chemoresistance in breast cancer. Down-regulation of PDCD4 is significantly associated with short overall survival of patients, which suggests that PDCD4 may be an independent prognostic marker for breast cancer.
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Affiliation(s)
- Qian Cai
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, China
- Key Laboratory of Cardiovasular Proteomics of Shandong Province, Qilu Hospital of Shandong University, Jinan, China
| | - Hsin-Sheng Yang
- Department of Toxicology and Cancer Biology, Collage of Medicine, University of Kentucky, Lexington, KY, United States
| | - Yi-Chen Li
- Department of Breast Surgery, General Surgery, Qilu Hospital of Shandong University, Jinan, China
| | - Jiang Zhu
- Department of Breast Surgery, General Surgery, Qilu Hospital of Shandong University, Jinan, China
- *Correspondence: Jiang Zhu,
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DNA-encoded library versus RNA-encoded library selection enables design of an oncogenic noncoding RNA inhibitor. Proc Natl Acad Sci U S A 2022; 119:2114971119. [PMID: 35110406 PMCID: PMC8833215 DOI: 10.1073/pnas.2114971119] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/01/2021] [Indexed: 12/31/2022] Open
Abstract
Drug discovery generally investigates one target at a time, in sharp contrast to living organisms, which mold ligands and targets by evolution of highly complex molecular interaction networks. We recapitulate this modality of discovery by encoding drug structures in DNA, allowing the entire DNA-encoded library to interact with thousands of RNA fold targets, and then decoding both drug and target by sequencing. This information serves as a filter to identify human RNAs aberrantly produced in cancer that are also binding partners of the discovered ligand, leading to a precision medicine candidate that selectively ablates an oncogenic noncoding RNA, reversing a disease-associated phenotype in cells. Nature evolves molecular interaction networks through persistent perturbation and selection, in stark contrast to drug discovery, which evaluates candidates one at a time by screening. Here, nature’s highly parallel ligand-target search paradigm is recapitulated in a screen of a DNA-encoded library (DEL; 73,728 ligands) against a library of RNA structures (4,096 targets). In total, the screen evaluated ∼300 million interactions and identified numerous bona fide ligand–RNA three-dimensional fold target pairs. One of the discovered ligands bound a 5′GAG/3′CCC internal loop that is present in primary microRNA-27a (pri-miR-27a), the oncogenic precursor of microRNA-27a. The DEL-derived pri-miR-27a ligand was cell active, potently and selectively inhibiting pri-miR-27a processing to reprogram gene expression and halt an otherwise invasive phenotype in triple-negative breast cancer cells. By exploiting evolutionary principles at the earliest stages of drug discovery, it is possible to identify high-affinity and selective target–ligand interactions and predict engagements in cells that short circuit disease pathways in preclinical disease models.
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Cai Y, Zhao X, Chen D, Zhang F, Chen Q, Shao CC, Ouyang YX, Feng J, Cui L, Chen M, Xu J. circ-NOL10 regulated by MTDH/CASC3 inhibits breast cancer progression and metastasis via multiple miRNAs and PDCD4. MOLECULAR THERAPY. NUCLEIC ACIDS 2021; 26:773-786. [PMID: 34729247 PMCID: PMC8526500 DOI: 10.1016/j.omtn.2021.09.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 09/24/2021] [Indexed: 02/05/2023]
Abstract
Circular RNAs (circRNAs) play important roles in carcinogenesis. Here, we investigated the mechanisms and clinical significance of circ-NOL10, a highly repressed circRNA in breast cancer. Subsequently, we also identified RNA-binding proteins (RBPs) that regulate circ-NOL10. Bioinformatics analysis was utilized to predict regulatory RBPs as well as circ-NOL10 downstream microRNAs (miRNAs) and mRNA targets. RNA immunoprecipitation, luciferase assay, fluorescence in situ hybridization, cell proliferation, wound healing, Matrigel invasion, cell apoptosis assays, and a xenograft model were used to investigate the function and mechanisms of circ-NOL10 in vitro and in vivo. The clinical value of circ-NOL10 was evaluated in a large cohort of breast cancer by quantitative real-time PCR. Circ-NOL10 is downregulated in breast cancer and associated with aggressive characteristics and shorter survival time. Upregulation of circ-NOL10 promotes apoptosis, decreases proliferation, and inhibits invasion and migration. Furthermore, circ-NOL10 binds multiple miRNAs to alleviate carcinogenesis by regulating PDCD4. CASC3 and metadherin (MTDH) can bind directly to circ-NOL10 with characterized motifs. Accordingly, ectopic expression or depletion of CASC3 or MTDH leads to circ-NOL10 expression changes, suggesting that these two RBPs modulate circ-NOL10 in cancer cells. circ-NOL10 is a novel biomarker for diagnosis and prognosis in breast cancer. These results highlight the importance of therapeutic targeting of the RBP-noncoding RNA (ncRNA) regulation network.
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Affiliation(s)
- Yujie Cai
- Systems Biology Lab, Shantou University Medical College (SUMC), 515041 Shantou, China
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, 524000 Zhanjiang, China
| | - Xing Zhao
- Systems Biology Lab, Shantou University Medical College (SUMC), 515041 Shantou, China
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center, Groningen, 9700 RB Groningen, the Netherlands
| | - Danze Chen
- Systems Biology Lab, Shantou University Medical College (SUMC), 515041 Shantou, China
| | - Fan Zhang
- Systems Biology Lab, Shantou University Medical College (SUMC), 515041 Shantou, China
| | - Qiuyang Chen
- Systems Biology Lab, Shantou University Medical College (SUMC), 515041 Shantou, China
| | - Chang-Chun Shao
- ChangJiang Scholar’s Laboratory, Shantou University Medical College (SUMC), 515041 Shantou, China
| | - Yan-Xiu Ouyang
- ChangJiang Scholar’s Laboratory, Shantou University Medical College (SUMC), 515041 Shantou, China
| | - Jun Feng
- Clinical Central Research Core, Xiang’an Hospital of Xiamen University, No. 2000, Xiang’an Road East, Xiamen, 361101 Fujian, China
| | - Lili Cui
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, 524000 Zhanjiang, China
| | - Min Chen
- Clinical Central Research Core, Xiang’an Hospital of Xiamen University, No. 2000, Xiang’an Road East, Xiamen, 361101 Fujian, China
- Corresponding author Min Chen, Clinical Central Research Core, Xiang’an Hospital of Xiamen University, No. 2000, Xiang’an Road East, Xiamen, 361101, Fujian, China
| | - Jianzhen Xu
- Systems Biology Lab, Shantou University Medical College (SUMC), 515041 Shantou, China
- Corresponding author Jianzhen Xu, Systems Biology Lab, Shantou University Medical College (SUMC), 515041 Shantou, China.
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Elwakeel E, Weigert A. Breast Cancer CAFs: Spectrum of Phenotypes and Promising Targeting Avenues. Int J Mol Sci 2021; 22:11636. [PMID: 34769066 PMCID: PMC8583860 DOI: 10.3390/ijms222111636] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/22/2021] [Accepted: 10/22/2021] [Indexed: 01/03/2023] Open
Abstract
Activationof the tumor-associated stroma to support tumor growth is a common feature observed in different cancer entities. This principle is exemplified by cancer-associated fibroblasts (CAFs), which are educated by the tumor to shape its development across all stages. CAFs can alter the extracellular matrix (ECM) and secrete a variety of different molecules. In that manner they have the capability to affect activation, survival, proliferation, and migration of other stromal cells and cancer cell themselves. Alteration of the ECM, desmoplasia, is a common feature of breast cancer, indicating a prominent role for CAFs in shaping tumor development in the mammary gland. In this review, we summarize the multiple roles CAFs play in mammary carcinoma. We discuss experimental and clinical strategies to interfere with CAFs function in breast cancer. Moreover, we highlight the issues arising from CAFs heterogeneity and the need for further research to identify CAFs subpopulation(s) that can be targeted to improve breast cancer therapy.
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Affiliation(s)
- Eiman Elwakeel
- Institute of Biochemistry I, Faculty of Medicine, Goethe-University Frankfurt, 60590 Frankfurt, Germany;
| | - Andreas Weigert
- Institute of Biochemistry I, Faculty of Medicine, Goethe-University Frankfurt, 60590 Frankfurt, Germany;
- Frankfurt Cancer Institute, Goethe-University Frankfurt, 60596 Frankfurt, Germany
- German Cancer Consortium (DKTK), Partner Site Frankfurt, 60590 Frankfurt, Germany
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11
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Shuvalova E, Egorova T, Ivanov A, Shuvalov A, Biziaev N, Mukba S, Pustogarov N, Terenin I, Alkalaeva E. Discovery of a novel role of tumor suppressor PDCD4 in stimulation of translation termination. J Biol Chem 2021; 297:101269. [PMID: 34606825 PMCID: PMC8551656 DOI: 10.1016/j.jbc.2021.101269] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/24/2021] [Accepted: 09/24/2021] [Indexed: 11/18/2022] Open
Abstract
Programmed cell death 4 protein (PDCD4) regulates many vital cell processes, although is classified as a tumor suppressor because it inhibits neoplastic transformation and tumor growth. For example, PCDC4 has been implicated in the regulation of transcription and mRNA translation. PDCD4 is known to inhibit translation initiation by binding to eukaryotic initiation factor 4A and elongation of oncogenic c- and A-myb mRNAs. Additionally, PDCD4 has been shown to interact with poly(A)-binding protein (PABP), which affects translation termination, although the significance of this interaction is not fully understood. Considering the interaction between PABP and PDCD4, we hypothesized that PDCD4 may also be involved in translation termination. Using in vitro translation systems, we revealed that PDCD4 directly activates translation termination. PDCD4 stimulates peptidyl-tRNA hydrolysis induced by a complex of eukaryotic release factors, eRF1-eRF3. Moreover, in combination with the PABP, which also stimulates peptide release, PDCD4 activity in translation termination increases. PDCD4 regulates translation termination by facilitating the binding of release factors to the ribosome, increasing the GTPase activity of eRF3, and dissociating eRF3 from the posttermination complex. Using a toe-printing assay, we determined the first stage at which PDCD4 functions-binding of release factors to the A-site of the ribosome. However, preventing binding of eRF3 with PABP, PDCD4 suppresses subsequent rounds of translation termination. Based on these data, we assumed that human PDCD4 controls protein synthesis during translation termination. The described mechanism of the activity of PDCD4 in translation termination provides a new insight into its functioning during suppression of protein biosynthesis.
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Affiliation(s)
- Ekaterina Shuvalova
- Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, Moscow, Russia
| | - Tatiana Egorova
- Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, Moscow, Russia; Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Moscow, Russia
| | - Alexander Ivanov
- Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, Moscow, Russia
| | - Alexey Shuvalov
- Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, Moscow, Russia; Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Moscow, Russia
| | - Nikita Biziaev
- Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, Moscow, Russia
| | - Sabina Mukba
- Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, Moscow, Russia
| | - Nikolay Pustogarov
- Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, Moscow, Russia
| | - Ilya Terenin
- A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Elena Alkalaeva
- Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, Moscow, Russia; Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Moscow, Russia.
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12
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Wu Q, Siddharth S, Sharma D. Triple Negative Breast Cancer: A Mountain Yet to Be Scaled Despite the Triumphs. Cancers (Basel) 2021; 13:3697. [PMID: 34359598 PMCID: PMC8345029 DOI: 10.3390/cancers13153697] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/13/2021] [Accepted: 07/18/2021] [Indexed: 12/12/2022] Open
Abstract
Metastatic progression and tumor recurrence pertaining to TNBC are certainly the leading cause of breast cancer-related mortality; however, the mechanisms underlying TNBC chemoresistance, metastasis, and tumor relapse remain somewhat ambiguous. TNBCs show 77% of the overall 4-year survival rate compared to other breast cancer subtypes (82.7 to 92.5%). TNBC is the most aggressive subtype of breast cancer, with chemotherapy being the major approved treatment strategy. Activation of ABC transporters and DNA damage response genes alongside an enrichment of cancer stem cells and metabolic reprogramming upon chemotherapy contribute to the selection of chemoresistant cells, majorly responsible for the failure of anti-chemotherapeutic regime. These selected chemoresistant cells further lead to distant metastasis and tumor relapse. The present review discusses the approved standard of care and targetable molecular mechanisms in chemoresistance and provides a comprehensive update regarding the recent advances in TNBC management.
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Affiliation(s)
| | - Sumit Siddharth
- Department of Oncology, Johns Hopkins University School of Medicine and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD 21231, USA;
| | - Dipali Sharma
- Department of Oncology, Johns Hopkins University School of Medicine and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD 21231, USA;
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13
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Dastmalchi N, Safaralizadeh R, Nargesi MM. LncRNAs: Potential Novel Prognostic and Diagnostic Biomarkers in Colorectal Cancer. Curr Med Chem 2020; 27:5067-5077. [PMID: 30827228 DOI: 10.2174/0929867326666190227230024] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 01/31/2019] [Accepted: 02/18/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND Long non-coding RNAs (lncRNAs), a type of regulatory RNAs, play a key role in numerous cellular pathways. Ectopic expression of this group of non-coding RNAs has been specified to be involved in numerous diseases. Moreover, the role of lncRNAs in the initiation and development of cancers including colorectal cancer (CRC) has been acknowledged. OBJECTIVE In the present review, the role of lncRNAs as prognostic and diagnostic biomarkers in CRC as well as the molecular mechanisms of their contribution to development of CRC has been addressed. RESULTS The presented studies have indicated the ectopic expression of various lncRNAs in CRC. Some lncRNAs which were considered as tumor suppressors were downregulated in the colorectal cancerous tissues compared with healthy controls; however, some with oncogenic effects were upregulated. LncRNAs contribute to tumor development via various molecular mechanisms such as epigenetically controlling the expression of target genes, interacting with miRNAs as their sponge, etc. Conclusion: LncRNAs that have been recognized as prognostic biomarkers may pave the way for clinical management to offer adjuvant treatments for patients with CRC.
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Affiliation(s)
- Narges Dastmalchi
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
| | - Reza Safaralizadeh
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
| | - Mirsaed Miri Nargesi
- Molecular Virology Section, Department of Virology and Immunology, LabPLUS, Auckland District Health Board (ADHB), Auckland, New Zealand
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14
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Ye M, Song Y, Pan S, Chu M, Wang ZW, Zhu X. Evolving roles of lysyl oxidase family in tumorigenesis and cancer therapy. Pharmacol Ther 2020; 215:107633. [PMID: 32693113 DOI: 10.1016/j.pharmthera.2020.107633] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 07/15/2020] [Indexed: 12/21/2022]
Abstract
The lysyl oxidase (LOX) family is comprised of LOX and four LOX-like proteins (LOXL1, LOXL2, LOXL3, and LOXL4), and mainly functions in the remodeling of extracellular matrix (ECM) and the cross-linking of collagen and elastic fibers. Recently, a growing body of research has demonstrated that LOX family is critically involved in the regulation of cancer cell proliferation, migration, invasion and metastasis. In this review, we discuss the roles of LOX family members in the development and progression of different types of human cancers. Furthermore, we also describe the potential inhibitors of LOX family proteins and highlight that LOX family might be an important therapeutic target for cancer therapy.
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Affiliation(s)
- Miaomiao Ye
- Departmant of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Yizuo Song
- Departmant of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Shuya Pan
- Departmant of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Man Chu
- Center of Scientific Research, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Zhi-Wei Wang
- Center of Scientific Research, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China..
| | - Xueqiong Zhu
- Departmant of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China.
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15
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Nuclear PDCD4 Expression Defines a Subset of Luminal B-Like Breast Cancers with Good Prognosis. Discov Oncol 2020; 11:218-239. [PMID: 32632815 DOI: 10.1007/s12672-020-00392-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 06/19/2020] [Indexed: 02/07/2023] Open
Abstract
The hormone receptor-positive (estrogen and/or progesterone receptor (PR)-positive) and HER2-negative breast cancer (BC) subtype is a biologically heterogeneous entity that includes luminal A-like (LumA-like) and luminal B-like (LumB-like) subtypes. Decreased PR levels is a distinctive biological feature of LumB-like tumors. These tumors also show reduced sensitivity to endocrine therapies and poorer prognosis than LumA-like tumors. Identification of biomarkers to accurately predict disease relapse in these subtypes is crucial in order to select effective therapies. We identified the tumor suppressor PDCD4 (programmed cell death 4), located in the nucleus (NPDCD4), as an independent prognostic factor of good clinical outcome in LumA-like and LumB-like subtypes. NPDCD4-positive LumB-like tumors presented overall and disease-free survival rates comparable to those of NPDCD4-positive LumA-like tumors, indicating that NPDCD4 improves the outcome of LumB-like patients. In contrast, NPDCD4 loss increased the risk of disease recurrence and death in LumB-like compared with LumA-like tumors. This, along with our results showing that LumB-like tumors present lower NPDCD4 positivity than LumA-like tumors, suggests that NPDCD4 loss contributes to endocrine therapy resistance in LumB-like BCs. We also revealed that PR induces PDCD4 transcription in LumB-like BC, providing a mechanistic explanation to the low PDCD4 levels in LumB-like BCs lacking PR. Finally, PDCD4 silencing enhanced BC cell survival in a patient-derived explant model of LumB-like disease. Our discoveries highlight NPDCD4 as a novel biomarker in LumA- and LumB-like subtypes, which could be included in the panel of immunohistochemical markers used in the clinic to accurately predict the prognosis of LumB-like tumors.
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16
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PDCD4 controls the G1/S-phase transition in a telomerase-immortalized epithelial cell line and affects the expression level and translation of multiple mRNAs. Sci Rep 2020; 10:2758. [PMID: 32066800 PMCID: PMC7026441 DOI: 10.1038/s41598-020-59678-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 12/27/2019] [Indexed: 12/11/2022] Open
Abstract
PDCD4, the protein encoded by the tumor suppressor gene PDCD4 (programmed cell death 4) has been implicated in the control of cellular transcription and translation by modulating the activity of specific transcription factors and suppressing the translation of mRNAs with structured 5′-UTRs. Most studies of human PDCD4 have employed tumor cell lines, possibly resulting in a biased picture of its role in normal cells. Here, we have studied the function of PDCD4 in a telomerase-immortalized human epithelial cell line. We show for the first time that PDCD4 is required for the G1/S-transition, demonstrating its crucial role in the cell cycle. Inhibition of p53-dependent activation of p21WAF1/CIP1 overrides the requirement for PDCD4 for the G1/S-transition, suggesting that PDCD4 counteracts basal p53 activity to prevent activation of the G1/S checkpoint by p53. Transcriptome and ribosome profiling data show that silencing of PDCD4 changes the expression levels and translation of many mRNAs, providing an unbiased view of the cellular processes that are affected by PDCD4 in an epithelial cell line. Our data identify PDCD4 as a key regulator of cell cycle- and DNA-related functions that are inhibited when it is silenced, suggesting that decreased expression of PDCD4 might contribute to tumor development by compromising genomic integrity.
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17
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Ye Y, Yang S, Han Y, Sun J, Xv L, Wu L, Ming L. HOXD-AS1 confers cisplatin resistance in gastric cancer through epigenetically silencing PDCD4 via recruiting EZH2. Open Biol 2019; 9:190068. [PMID: 31551012 PMCID: PMC6769292 DOI: 10.1098/rsob.190068] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 08/28/2019] [Indexed: 12/31/2022] Open
Abstract
Increasing evidence suggests that dysregulation of long non-coding RNAs (lncRNAs) is implicated in chemoresistance in cancers. However, the function and molecular mechanisms of lncRNAs in gastric cancer chemoresistance are still not well understood. In this study, we aimed to investigate the functional role and the underlying molecular mechanisms of lncRNA HOXD cluster antisense RNA 1 (HOXD-AS1) in cisplatin (DDP) resistance in gastric cancer. Our results revealed that HOXD-AS1 was upregulated in DDP-resistant gastric cancer tissues and cells. Patients with gastric cancer with high HOXD-AS1 expression levels had a poor prognosis. Knockdown of HOXD-AS1 facilitated the sensitivity of DDP-resistant gastric cancer cells to DDP. Additionally, HOXD-AS1 epigenetically silenced PDCD4 through binding to the histone methyltransferase enhancer of zeste homologue 2 (EZH2) on the promoter of PDCD4, thus increasing H3K27me3. More importantly, PDCD4 silencing counteracted HOXD-AS1 knockdown-mediated enhancement of DDP sensitivity in DDP-resistant gastric cancer cells. In summary, HOXD-AS1 led to DDP resistance in gastric cancer by epigenetically suppressing PDCD4 expression, providing a novel therapeutic strategy for patients with gastric cancer with chemoresistance.
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Affiliation(s)
| | | | | | | | | | | | - Liang Ming
- Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450000, People's Republic of China
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18
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Xu C, Guo Y, Liu H, Chen G, Yan Y, Liu T. TUG1 confers cisplatin resistance in esophageal squamous cell carcinoma by epigenetically suppressing PDCD4 expression via EZH2. Cell Biosci 2018; 8:61. [PMID: 30519392 PMCID: PMC6263046 DOI: 10.1186/s13578-018-0260-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Accepted: 11/22/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Increasing evidence has suggested the involvement of long non-coding RNA taurine upregulated gene 1 (TUG1) in chemoresistance of cancer treatment. However, its function and molecular mechanisms in esophageal squamous cell carcinoma (ESCC) chemoresistance are still not well elucidated. In the present study, we investigate the functional role of TUG1 in cisplatin (DDP) resistance of ESCC and discover the underlying molecular mechanism. RESULTS Our study revealed that TUG1 was up-regulated in DDP-resistant ESCC tissues and cells. High TUG1 expression was correlated with poor prognosis of ESCC patients. TUG1 knockdown improved the sensitivity of ECA109/DDP and EC9706/DDP cells to DDP. Moreover, TUG1 could epigenetically suppress PDCD4 expression via recruiting enhancer of zeste homolog 2. PDCD4 overexpression could mimic the functional role of down-regulated TUG1 in DDP resistance. PDCD4 knockdown counteracted the inductive effect of TUG1 inhibition on DDP sensitivity of ECA109/DDP and EC9706/DDP cells. Furthermore, TUG1 knockdown facilitated DDP sensitivity of DDP-resistant ESCC cells in vivo. CONCLUSION TUG1 knockdown overcame DDP resistance of ESCC by epigenetically silencing PDCD4, providing a novel therapeutic target for ESCC.
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Affiliation(s)
- Caihui Xu
- Department of Oncology, Shangqiu First People’s Hospital, No. 292 Kaixuan South Road, Shangqiu, 476100 China
| | - Yinmou Guo
- Department of Oncology, Shangqiu First People’s Hospital, No. 292 Kaixuan South Road, Shangqiu, 476100 China
| | - Haiyan Liu
- Department of Oncology, Shangqiu First People’s Hospital, No. 292 Kaixuan South Road, Shangqiu, 476100 China
| | - Gongbin Chen
- Department of Oncology, Shangqiu First People’s Hospital, No. 292 Kaixuan South Road, Shangqiu, 476100 China
| | - Yanju Yan
- Department of Oncology, Shangqiu First People’s Hospital, No. 292 Kaixuan South Road, Shangqiu, 476100 China
| | - Teng Liu
- Department of Oncology, Xinxiang Medical College, No. 601 Jinsui Avenue, Hongqi District, Xinxiang, 453003 China
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19
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Wang H, Li H, Zhang L, Yang D. Overexpression of MEG3 sensitizes colorectal cancer cells to oxaliplatin through regulation of miR-141/PDCD4 axis. Biomed Pharmacother 2018; 106:1607-1615. [DOI: 10.1016/j.biopha.2018.07.131] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 07/18/2018] [Accepted: 07/24/2018] [Indexed: 02/07/2023] Open
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20
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Zeng T, Zhang Q, Yu X, Gao X, Qiu Y. Inhibition of cell migration and invasion and promotion of cell apoptosis by overexpression of programmed cell death 4 (PDCD4) in cervical cancer Siha cells. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2018; 11:4676-4683. [PMID: 31949868 PMCID: PMC6962986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 07/31/2018] [Indexed: 06/10/2023]
Abstract
Cervical cancer has been one of the leading causes of cancer-related deaths among women worldwide. However, few targeted drugs have been developed because of the poor understanding about the mechanisms of cervical cancer. A growing number of studies in recent years have shown that programmed cell death 4 (PDCD4), a new tumor suppressor, participates in the tumorigenesis and progression of various cancers. In this study, we investigated the influence of PDCD4 on cell migration, invasion, and apoptosis of cervical cancer cells. Siha cervical cancer cells were transfected with a recombinant lentivirus vector carrying the complete length of the PDCD4 gene and the normal controlled vector respectively and screened by puromycin. The expression of the mRNA and protein of PDCD4 were significantly elevated in Siha cells transfected with the recombinant vector carrying the PDCD4 gene. Then the overexpression of PDCD4 suppressed the cell migration and invasion in transwell migration and matrigel invasion assays respectively. Moreover, the overexpression of PDCD4 increased the proportion of cell apoptosis in flow cytometry analysis. In a multiple signal pathways assay, the upregulation of PDCD4 promoted the phosphorylation of some key proteins, such as p53 and STAT1. These results suggest that PDCD4 is a potential therapeutic target for cervical cancer.
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Affiliation(s)
- Tao Zeng
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical UniversityGuangzhou, P. R. China
- Department of Laboratory Medicine, School of Laboratory Medicine and Biotechnology, Southern Medical UniversityGuangzhou, P. R. China
| | - Qiong Zhang
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical UniversityGuangzhou, P. R. China
| | - Xiaobin Yu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical UniversityGuangzhou, P. R. China
| | - Xiang Gao
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical UniversityGuangzhou, P. R. China
| | - Yurong Qiu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical UniversityGuangzhou, P. R. China
- Guangdong Key Laboratory of Biochip TechnologyGuangzhou, P. R. China
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21
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Lo Dico A, Martelli C, Diceglie C, Lucignani G, Ottobrini L. Hypoxia-Inducible Factor-1α Activity as a Switch for Glioblastoma Responsiveness to Temozolomide. Front Oncol 2018; 8:249. [PMID: 30013951 PMCID: PMC6036118 DOI: 10.3389/fonc.2018.00249] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 06/19/2018] [Indexed: 11/13/2022] Open
Abstract
Rationale The activity of the transcription factor, hypoxia-inducible factor (HIF)-1α, is a common driver of a number of the pathways involved in the aggressiveness of glioblastomas (GBMs), and it has been suggested that the reduction in this activity observed, soon after the administration of temozolomide (TMZ), can be a biomarker of an early response in GBM models. As HIF-1α is a tightly regulated protein, studying the processes involved in its downregulation could shed new light on the mechanisms underlying GBM sensitivity or resistance to TMZ. Methods The effect of HIF-1α silencing on cell responsiveness to TMZ was assessed in four genetically different human GBM cell lines by evaluating cell viability and apoptosis-related gene balance. LAMP-2A silencing was used to evaluate the contribution of chaperone-mediated autophagy (CMA) to the modulation of HIF-1α activity in TMZ-sensitive and TMZ-resistant cells. Results The results showed that HIF-1α but not HIF-2α activity is associated with GBM responsiveness to TMZ: its downregulation improves the response of TMZ-resistant cells, while blocking CMA-mediated HIF-1α degradation induces resistance to TMZ in TMZ-sensitive cells. These findings are in line with the modulation of crucial apoptosis-related genes. Conclusion Our results demonstrate the central role played by HIF-1α activity in determining the sensitivity or resistance of GBMs to TMZ, and we suggest that CMA is the cellular mechanism responsible for modulating this activity after TMZ treatment.
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Affiliation(s)
- Alessia Lo Dico
- Institute of Molecular Bioimaging and Physiology (IBFM), CNR, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Cristina Martelli
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Cecilia Diceglie
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Giovanni Lucignani
- Department of Health Sciences, University of Milan, Milan, Italy.,Department of Diagnostic Services, Unit of Nuclear Medicine, San Paolo Hospital, Milan, Italy
| | - Luisa Ottobrini
- Institute of Molecular Bioimaging and Physiology (IBFM), CNR, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
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22
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Wang Q, Yang HS. The role of Pdcd4 in tumour suppression and protein translation. Biol Cell 2018; 110:10.1111/boc.201800014. [PMID: 29806708 PMCID: PMC6261700 DOI: 10.1111/boc.201800014] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/03/2018] [Accepted: 05/13/2018] [Indexed: 01/07/2023]
Abstract
Programmed cell death 4 (Pdcd4), a tumour suppressor, is frequently down-regulated in various types of cancer. Pdcd4 has been demonstrated to efficiently suppress tumour promotion, progression and proliferation. The biochemical function of Pdcd4 is a protein translation inhibitor. Although the fact that Pdcd4 inhibits protein translation has been known for more than a decade, the mechanism by which Pdcd4 controls tumorigenesis through translational regulation of its target genes is still not fully understood. Recent studies show that Pdcd4 inhibits translation of stress-activated-protein kinase interacting protein 1 to suppress tumour invasion, depicting a picture of how Pdcd4 inhibits tumorigenesis through translational inhibition. Thus, understanding the mechanism of how Pdcd4 attenuates tumorigenesis by translational control should provide a new strategy for combating cancer.
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Affiliation(s)
- Qing Wang
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky
| | - Hsin-Sheng Yang
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky
- Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, Kentucky
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23
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Xu YT, Chen RQ, Lin GB, Fang XL, Yu SJ, Liang XH, Zhang R. Defining the regulatory role of programmed cell death 4 in laryngeal squamous cell carcinoma. Biochem Cell Biol 2018; 96:522-538. [PMID: 29510060 DOI: 10.1139/bcb-2017-0293] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Programmed cell death 4 (PDCD4) is decreased in many different kinds of malignant tumors. EMT endows tumor cells invasive and metastatic properties. However, few studies have determined the role of PDCD4 in the regulation of EMT in the context of laryngeal carcinoma. We examined the relationship between PDCD4 and EMT-associated proteins E-cadherin and N-cadherin using laryngeal carcinoma tissues. Gene manipulation was used to define the regulatory capacity of PDCD4. We report that PDCD4 and E-cadherin/N-cadherin expression were significantly changed in the carcinoma tissues, and their expression was associated with pathological grade, metastatic state, and clinical stage. The suppression of PDCD4 (and consequently, E-cadherin) was concomitant with increased proliferation and G2-phase arrest, decreased apoptosis, and increased cell invasion. PDCD4 upregulation reversed the above-mentioned results. In nude mice, PDCD4 knockdown increased tumor growth and pathological features, confirming the tumorigenic role of PDCD4. Finally, PDCD4 silencing was associated with dysregulation of the carcinogenic Wnt-β-catenin and the STAT3-miR-21 signaling pathways. This study revealed a dynamic regulatory relationship between PDCD4 and critical factors for EMT, establishing a broad, functional role for PDCD4 in laryngeal carcinoma, which may be propagated by the STAT3-miR-21 pathway. These findings provide new information on an EMT-associated target that may lead to a novel therapy.
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Affiliation(s)
- Yuan-Teng Xu
- a Department of Otolaryngology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, Fujian, P.R. China
| | - Rui-Qing Chen
- b Central Laboratory, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, Fujian, P.R. China
| | - Gong-Biao Lin
- a Department of Otolaryngology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, Fujian, P.R. China
| | - Xiu-Ling Fang
- a Department of Otolaryngology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, Fujian, P.R. China
| | - Shu-Juan Yu
- a Department of Otolaryngology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, Fujian, P.R. China
| | - Xiao-Hua Liang
- c Clinical Laboratory, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, Fujian, P.R. China
| | - Rong Zhang
- a Department of Otolaryngology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, Fujian, P.R. China
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24
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Lu P, Xue Yang, Yang Y, Wang F, Li L, Gu Y. Retracted Article: Linc00472 suppresses breast cancer progression and enhances doxorubicin sensitivity through regulation of miR-141 and programmed cell death 4. RSC Adv 2018; 8:8455-8468. [PMID: 35539872 PMCID: PMC9078624 DOI: 10.1039/c8ra00296g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 02/16/2018] [Indexed: 11/21/2022] Open
Abstract
The existence of drug resistance strikingly hampers the therapy of many malignancies, including breast cancer. Long non-coding RNAs (LncRNAs) have been reported to participate in the regulation of various biological processes associated with cancer progression. Whereas, the role of linc00472 in breast cancer pathogenesis and doxorubicin (ADR) resistance have not been well elucidated. In the present study, it is found that linc00472 expression was decreased in breast cancer tissues and cells. Moreover, higher linc00472 expression was positively associated with favorable disease status and prognosis for breast cancer patients. Functional analyses revealed that linc00472 overexpression suppressed proliferation and invasion, facilitated apoptosis and enhanced ADR sensitivity in breast cancer cells. Mechanistic studies discovered that linc00472 acted as a competing endogenous RNA (ceRNA) of miR-141 to sequester miR-141 from its target mRNA PDCD4 (programmed cell death 4). Furthermore, the inhibition effect of linc00472 on breast cancer cell progression and ADR resistance could be partly abrogated by miR-141 up-regulation or PDCD4 knockdown. In vivo assays also demonstrated that linc00472 hindered tumor growth by suppressing miR-141 expression and enhancing PDCD4 expression. In conclusion, linc00472 blocked breast cancer progression and induced ADR sensitivity through regulation of miR-141 and PDCD4, highlighting a potential therapeutic strategy for breast cancer patients. Linc00472 expression was down-regulated in breast cancer tissues and cells, and was associated with the development and prognosis of breast cancer.![]()
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Affiliation(s)
- Pengwei Lu
- Department of Breast Surgery
- The First Affiliated Hospital of Zhengzhou University
- Zhengzhou
- China
| | - Xue Yang
- Department of Breast Surgery
- The First Affiliated Hospital of Zhengzhou University
- Zhengzhou
- China
| | - Yunqing Yang
- Department of Breast Surgery
- The First Affiliated Hospital of Zhengzhou University
- Zhengzhou
- China
| | - Fang Wang
- Department of Breast Surgery
- The First Affiliated Hospital of Zhengzhou University
- Zhengzhou
- China
| | - Lin Li
- Department of Breast Surgery
- The First Affiliated Hospital of Zhengzhou University
- Zhengzhou
- China
| | - Yuanting Gu
- Department of Breast Surgery
- The First Affiliated Hospital of Zhengzhou University
- Zhengzhou
- China
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25
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Wei B, Zhou X, Liang C, Zheng X, Lei P, Fang J, Han X, Wang L, Qi C, Wei H. Human colorectal cancer progression correlates with LOX-induced ECM stiffening. Int J Biol Sci 2017; 13:1450-1457. [PMID: 29209148 PMCID: PMC5715527 DOI: 10.7150/ijbs.21230] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 10/08/2017] [Indexed: 02/07/2023] Open
Abstract
Some solid tumors are characterized by extracellular matrix (ECM) remodeling and stiffening, which is related to solid tumor progression and aggression. However, the relationship between ECM stiffness and colorectal cancer (CRC) remains unclear. In this study, we investigated the relevance of ECM stiffness to clinicopathologic features using human CRC tissue microarrays. The results demonstrate that the expression of ECM components in CRC tissues is closely correlated with CRC progression and poor prognosis, which indicates that ECM stiffness may be associated with CRC development. We further studied lysyl oxidase (LOX) expression in CRC tissue and demonstrated that LOX expression is closely correlated with CRC progression. Previous studies showed that P-selectin-mediated platelet accumulation in CRC tissue may up-regulate LOX expression. Our findings indicate that P-selectin-mediated platelet aggregation may up-regulate LOX expression and enhance the remodeling and stiffening of the tumor ECM, which may promote the progression of colorectal cancer. Therefore, LOX may be a potential effective therapeutic target to treat colorectal cancer.
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Affiliation(s)
- Bo Wei
- Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
| | - Xueling Zhou
- Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
| | - Chenghua Liang
- Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
| | - Xiaoming Zheng
- Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
| | - Purun Lei
- Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
| | - Jiafeng Fang
- Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
| | - Xiaoyan Han
- Central Laboratory, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
| | - Lijing Wang
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, China
| | - Cuiling Qi
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, China
| | - Hongbo Wei
- Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
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Tumor suppressor Pdcd4 attenuates Sin1 translation to inhibit invasion in colon carcinoma. Oncogene 2017; 36:6225-6234. [PMID: 28692058 PMCID: PMC5680133 DOI: 10.1038/onc.2017.228] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/22/2017] [Accepted: 06/01/2017] [Indexed: 12/16/2022]
Abstract
Programmed cell death 4 (Pdcd4), a tumor invasion suppressor, is frequently down-regulated in colorectal cancer and other cancers. In this study, we find that loss of Pdcd4 increases the activity of mammalian target of rapamycin complex 2 (mTORC2) and thereby upregulates Snail expression. Examining the components of mTORC2 showed that Pdcd4 knockdown increased the protein but not mRNA level of stress-activated-protein kinase interacting protein 1 (Sin1), which resulted from enhanced Sin1 translation. To understand how Pdcd4 regulates Sin1 translation, the SIN1 5’ untranslated region (5’UTR) was fused with luciferase reporter and named as 5’Sin1-Luc. Pdcd4 knockdown/knockout significantly increased the translation of 5’Sin1-Luc but not the control luciferase without the SIN1 5’UTR, suggesting that Sin1 5’UTR is necessary for Pdcd4 to inhibit Sin1 translation. Ectopic expression of wild type Pdcd4 and Pdcd4(157–469), a deletion mutant that binds to translation initiation factor 4A (eIF4A), sufficiently inhibited Sin1 translation, and thus suppressed mTORC2 kinase activity and invasion in colon tumor cells. By contrast, Pdcd4(157–469)(D253A,D418A), a mutant that does not bind to eIF4A, failed to inhibit Sin1 translation, and consequently failed to repress mTORC2 activity and invasion. In addition, directly inhibiting eIF4A with silvestrol significantly suppressed Sin1 translation and attenuated invasion. These results indicate that Pdcd4-inhibited Sin1 translation is through suppressing eIF4A, and functionally important for suppression of mTORC2 activity and invasion. Moreover, in colorectal cancer tissues, the Sin1 protein but not mRNA was significantly up-regulated while Pdcd4 protein was down-regulated, suggesting that loss of Pdcd4 might correlate with Sin1 protein level but not mRNA level in colorectal cancer patients. Taken together, our work reveals a novel mechanism by which Pdcd4 inhibits Sin1 translation to attenuatemTORC2 activity and thereby suppresses invasion.
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miR-155 Regulated Inflammation Response by the SOCS1-STAT3-PDCD4 Axis in Atherogenesis. Mediators Inflamm 2016; 2016:8060182. [PMID: 27843203 PMCID: PMC5098093 DOI: 10.1155/2016/8060182] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/01/2016] [Accepted: 08/04/2016] [Indexed: 12/18/2022] Open
Abstract
Inflammation response plays a critical role in all phases of atherosclerosis (AS). Increased evidence has demonstrated that miR-155 mediates inflammatory mediators in macrophages to promote plaque formation and rupture. However, the precise mechanism of miR-155 remains unclear in AS. Here, we also found that miR-155 and PDCD4 were elevated in the aortic tissue of atherosclerotic mice and ox-LDL treated RAW264.7 cells. Further studies showed that miR-155 not only directly inhibited SOCS1 expression, but also increased the expression of p-STAT and PDCD4, as well as the production of proinflammation mediators IL-6 and TNF-α. Downregulation of miR-155 and PDCD4 and upregulation of SOCS1 obviously decreased the IL-6 and TNF-α expression. In addition, inhibition of miR-155 levels in atherosclerotic mice could notably reduce the IL-6 and TNF-α level in plasma and aortic tissue, accompanied with increased p-STAT3 and PDCD4 and decreased SOCS1. Thus, miR-155 might mediate the inflammation in AS via the SOCS1-STAT3-PDCD4 axis. These results provide a rationale for intervention of intracellular miR-155 as possible antiatherosclerotic targets.
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Qi C, Li J, Guo S, Li M, Li Y, Li J, Zhang Q, Zheng L, He X, Zheng X, He Y, Wang L, Wei B. P-selectin-mediated LOX expression promotes insulinoma growth in Rip1-Tag2 mice by increasing tissue stiffness. Int J Biol Sci 2016; 12:1289-1297. [PMID: 27877081 PMCID: PMC5118775 DOI: 10.7150/ijbs.16405] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 09/04/2016] [Indexed: 02/07/2023] Open
Abstract
P-selectin, a cell adhesion molecule, is an important member of the selectin family. Recent studies have shown that P-selectin deletion inhibits tumor growth in Rip1-Tag2 mice by suppressing platelet accumulation in tumor tissues. This study aimed to evaluate whether and how P-selectin affects tumor stiffness in Rip1-Tag2 mice. To explore the role of P-selectin in tissue stiffness, we demonstrated that tumor progression in Rip1-Tag2 mice was correlated with tissue stiffness using immunofluorescence and histological staining. Furthermore, we showed that P-selectin deficiency significantly decreased tissue stiffness by inhibiting lysyl oxidase (LOX) expression. Our experiments involving Rip1-Tag2 mice treated with the LOX inhibitor BAPN showed that BAPN significantly abolished collagen deposition to decrease tumor stiffness and thus inhibit tumor growth. These results indicate that P-selectin deletion significantly decreases tumor stiffness in Rip1-Tag2 mice by inhibiting LOX expression. Further study demonstrated that P-selectin-mediated platelet accumulation increases tissue stiffness mainly by increasing LOX expression and thus promotes tumor growth. Therefore, P-selectin may be an effective therapeutic targeting for treating human insulinomas.
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Affiliation(s)
- Cuiling Qi
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Jialin Li
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Simei Guo
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Mengshi Li
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yuanyuan Li
- Department of Pathology, University of Guangzhou Chinese Medicine, Guangzhou, Guangdong 510000, China
| | - Jiangchao Li
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Qianqian Zhang
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Lingyun Zheng
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Xiaodong He
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Xiaoming Zheng
- Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
| | - Yanli He
- Department of Pathology, University of Guangzhou Chinese Medicine, Guangzhou, Guangdong 510000, China
| | - Lijing Wang
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Bo Wei
- Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
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Li Y, Jiang D, Zhang Q, Liu X, Cai Z. Ubiquitin-specific protease 4 inhibits breast cancer cell growth through the upregulation of PDCD4. Int J Mol Med 2016; 38:803-11. [PMID: 27430936 PMCID: PMC4990282 DOI: 10.3892/ijmm.2016.2685] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 07/04/2016] [Indexed: 01/23/2023] Open
Abstract
Breast cancer is a common malignant tumor affecting women. The study of the association between breast cancer and molecular aberrations may lead to the development of novel diagnostic and therapeutic strategies for the disease. In the present study, we examined the role of ubiquitin-specific protease 4 (USP4) in breast cancer. We found that USP4 expression was significantly decreased in breast cancer tissue samples compared with paired normal breast tissue samples (P<0.001). USP4 was identified as a tumor suppressor. In addition, by inducing USP4 overexpression (using a USP4 overexpression plasmid) or the knockdown of USP4 (by transfection with a USP4 shRNA plasmid), we found that USP4 inhibited cell proliferation in vitro. We also found that USP4 suppressed tumor growth by using a mouse tumor xenograft model. Moreover, programmed cell death 4 (PCD4) was identified to be a target of USP4, which plays a role as a tumor suppressor. As a whole, our findings sugggest that USP4 acts as a tumor suppressor in breast cancer and that it may be an effective target for the treatment of breast cancer.
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Affiliation(s)
- Yang Li
- Department of Breast Surgery, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning 110042
| | - Daqing Jiang
- Department of Breast Surgery, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning 110042
| | - Qi Zhang
- Department of Breast Surgery, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning 110042
| | - Xiaoli Liu
- Department of Interventional Radiology, The Second Affiliated Hospital of Dalian Medical University
| | - Zhengang Cai
- Department of Breast Surgery, The First Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116023, P.R. China
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30
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Cheng Y, Xiang G, Meng Y, Dong R. MiRNA-183-5p promotes cell proliferation and inhibits apoptosis in human breast cancer by targeting the PDCD4. Reprod Biol 2016; 16:225-233. [PMID: 27476679 DOI: 10.1016/j.repbio.2016.07.002] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 06/23/2016] [Accepted: 07/11/2016] [Indexed: 11/16/2022]
Abstract
MicroRNAs are often aberrantly expressed in breast cancer and postulated to play a causal role in the onset and maintenance of breast cancer by binding to its target mRNA. Here, we evaluated the effects of miRNA-183-5p on cell proliferation and apoptosis which attempted to elucidate the potential role of miR-183-5p/PDCD4 axis in human breast cancer. We found that the miR-183-5p expression level was extremely promoted in breast cancer in comparison with the adjacent normal tissues. Overexpression of miR-183-5p significantly enhanced the cell proliferation and inhibited cell apoptosis in MCF-7 and MDA-MB-231 cells. Moreover, PDCD4 was predicted as a putative target of miR-183-5p by bioinformatic approaches, and miR-183-5p negatively regulated the expression of PDCD4. Furthermore, knockdown of PDCD4 suppressed expression of p21 and p27, which was consistent with the result of the attachment of miR-183-5p. These data collectively demonstrate that miR-183-5p exerts oncomiRs effects in breast cancer, and may have broad impacts on the field of using antimiRs as anti-cancer drugs for breast cancer.
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Affiliation(s)
- Yan Cheng
- Department of Pharmacology, Xingtai Medical College, Xingtai 054000, China
| | - Guixian Xiang
- Department of Pharmacology, Xingtai Medical College, Xingtai 054000, China
| | - Yanbo Meng
- Department of Pharmacology, Xingtai Medical College, Xingtai 054000, China
| | - Runzhi Dong
- Department of traditional Chinese medicine, Xingtai people's hospital, Xingtai 054000, China.
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31
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Liang H, Wang F, Chu D, Zhang W, Liao Z, Fu Z, Yan X, Zhu H, Guo W, Zhang Y, Guan W, Chen X. miR-93 functions as an oncomiR for the downregulation of PDCD4 in gastric carcinoma. Sci Rep 2016; 6:23772. [PMID: 27021515 PMCID: PMC4810498 DOI: 10.1038/srep23772] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 03/14/2016] [Indexed: 01/01/2023] Open
Abstract
Programmed cell death 4 (PDCD4), as a tumor suppressor gene, is frequently reduced in a variety of tumors, including gastric cancer. Previous findings have indicated that PDCD4 participates in tumorigenesis through the regulation of apoptosis, but the molecular basis of this process has not been fully elucidated, and no studies have shown the upstream regulation of this gene in gastric cancer. In this study, we used bioinformatics analysis to search for miRNAs that could potentially target PDCD4 and identified miR-93 as a candidate. Moreover, we observed the inverse correlation between miR-93 and PDCD4 protein levels, but not mRNA levels, in human gastric cancer tissues. We further experimentally validated PDCD4 as the direct target of miR-93 by evaluating PDCD4 expression in gastric cancer cells after the overexpression or knockdown of miR-93. Additionally, the biological consequences of targeting PDCD4 through miR-93 were examined using cell apoptosis assays in vitro. We demonstrated that the repression of PDCD4 through miR-93 suppressed the apoptosis of gastric cancer cells. Finally, we revealed that miR-93 promoted the development of gastric tumor growth in xenograft mice by negatively regulating PDCD4. Taken together, the findings of the present study indicated the oncogenic role of miR-93 in gastric cancer tumorigenesis through targeting PDCD4, particularly in apoptosis.
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Affiliation(s)
- Hongwei Liang
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Feng Wang
- Department of General Surgery, The Affiliated Drum Tower Hospital of Medical School of Nanjing University and Nanjing Multi-center Biobank, Nanjing, Jiangsu 210008, China
| | - Danping Chu
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Weijie Zhang
- Department of General Surgery, The Affiliated Drum Tower Hospital of Medical School of Nanjing University and Nanjing Multi-center Biobank, Nanjing, Jiangsu 210008, China
| | - Zhicong Liao
- Department of Cardio-Thoracic Surgery, The Affiliated Drum Tower Hospital of Medical School of Nanjing University and Nanjing Multi-center Biobank, Nanjing, Jiangsu 210008, China
| | - Zheng Fu
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Xin Yan
- Department of Respiratory Medicine, The Affiliated Drum Tower Hospital of Medical School of Nanjing University and Nanjing Multi-center Biobank, Nanjing, Jiangsu 210008, China
| | - Hao Zhu
- Department of Gastroenterology, The Affiliated Drum Tower Hospital of Medical School of Nanjing University and Nanjing Multi-center Biobank, Nanjing, Jiangsu 210008, China
| | - Wen Guo
- Department of Endocrinology, Nanjing Municipal Hospital for Governmental Organizations, Nanjing, Jiangsu 210018, China
| | - Yujing Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Wenxian Guan
- Department of General Surgery, The Affiliated Drum Tower Hospital of Medical School of Nanjing University and Nanjing Multi-center Biobank, Nanjing, Jiangsu 210008, China
| | - Xi Chen
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China
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Wang T, Long S, Zhao N, Wang Y, Sun H, Zou Z, Wang J, Ran X, Su Y. Cell Density-Dependent Upregulation of PDCD4 in Keratinocytes and Its Implications for Epidermal Homeostasis and Repair. Int J Mol Sci 2015; 17:ijms17010008. [PMID: 26703592 PMCID: PMC4730255 DOI: 10.3390/ijms17010008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/13/2015] [Accepted: 12/16/2015] [Indexed: 01/08/2023] Open
Abstract
Programmed cell death 4 (PDCD4) is one multi-functional tumor suppressor inhibiting neoplastic transformation and tumor invasion. The role of PDCD4 in tumorigenesis has attracted more attention and has been systematically elucidated in cutaneous tumors. However, the normal biological function of PDCD4 in skin is still unclear. In this study, for the first time, we find that tumor suppressor PDCD4 is uniquely induced in a cell density-dependent manner in keratinocytes. To determine the potential role of PDCD4 in keratinocyte cell biology, we show that knockdown of PDCD4 by siRNAs can promote cell proliferation in lower cell density and partially impair contact inhibition in confluent HaCaT cells, indicating that PDCD4 serves as an important regulator of keratinocytes proliferation and contact inhibition in vitro. Further, knockdown of PDCD4 can induce upregulation of cyclin D1, one key regulator of the cell cycle. Furthermore, the expression patterns of PDCD4 in normal skin, different hair cycles and the process of wound healing are described in detail in vivo, which suggest a steady-state regulatory role of PDCD4 in epidermal homeostasis and wound healing. These findings provide a novel molecular mechanism for keratinocytes’ biology and indicate that PDCD4 plays a role in epidermal homeostasis.
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Affiliation(s)
- Tao Wang
- Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, School of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
| | - Shuang Long
- Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, School of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
| | - Na Zhao
- Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, School of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
| | - Yu Wang
- Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, School of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
| | - Huiqin Sun
- Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, School of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
| | - Zhongmin Zou
- Institute of Toxicology, School of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
| | - Junping Wang
- Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, School of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
| | - Xinze Ran
- Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, School of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
| | - Yongping Su
- Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, School of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
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Kakkad S, Glunde K, Penet MF, Bhujwalla ZM. Structural and functional roles of collagen 1 fibers in breast cancer metastasis: collagen 1 fiber density increases in lymph node-positive breast cancers. BREAST CANCER MANAGEMENT 2015. [DOI: 10.2217/bmt.15.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Samata Kakkad
- JHU ICMIC Program, Division of Cancer Imaging Research, The Russell H Morgan Department of Radiology & Radiological Science, Johns Hopkins University School of Medicine, 208C Traylor Building, 720 Rutland Avenue, Baltimore, MD 21205, USA
| | - Kristine Glunde
- JHU ICMIC Program, Division of Cancer Imaging Research, The Russell H Morgan Department of Radiology & Radiological Science, Johns Hopkins University School of Medicine, 208C Traylor Building, 720 Rutland Avenue, Baltimore, MD 21205, USA
- Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Marie-France Penet
- JHU ICMIC Program, Division of Cancer Imaging Research, The Russell H Morgan Department of Radiology & Radiological Science, Johns Hopkins University School of Medicine, 208C Traylor Building, 720 Rutland Avenue, Baltimore, MD 21205, USA
- Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Zaver M Bhujwalla
- JHU ICMIC Program, Division of Cancer Imaging Research, The Russell H Morgan Department of Radiology & Radiological Science, Johns Hopkins University School of Medicine, 208C Traylor Building, 720 Rutland Avenue, Baltimore, MD 21205, USA
- Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Targeting the eIF4A RNA helicase as an anti-neoplastic approach. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2015; 1849:781-91. [DOI: 10.1016/j.bbagrm.2014.09.006] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 09/03/2014] [Indexed: 01/22/2023]
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35
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Kruppel-like factor 4 signals through microRNA-206 to promote tumor initiation and cell survival. Oncogenesis 2015; 4:e155. [PMID: 26053033 PMCID: PMC4753526 DOI: 10.1038/oncsis.2015.8] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 02/25/2015] [Accepted: 03/11/2015] [Indexed: 12/19/2022] Open
Abstract
Tumor cell heterogeneity poses a major hurdle in the treatment of cancer. Mammary cancer stem-like cells (MaCSCs), or tumor-initiating cells, are highly tumorigenic sub-populations that have the potential to self-renew and to differentiate. These cells are clinically important, as they display therapeutic resistance and may contribute to treatment failure and recurrence, but the signaling axes relevant to the tumorigenic phenotype are poorly defined. The zinc-finger transcription factor Kruppel-like factor 4 (KLF4) is a pluripotency mediator that is enriched in MaCSCs. KLF4 promotes RAS-extracellular signal-regulated kinase pathway activity and tumor cell survival in triple-negative breast cancer (TNBC) cells. In this study, we found that both KLF4 and a downstream effector, microRNA-206 (miR-206), are selectively enriched in the MaCSC fractions of cultured human TNBC cell lines, as well as in the aldehyde dehydrogenase-high MaCSC sub-population of cells derived from xenografted human mammary carcinomas. The suppression of endogenous KLF4 or miR-206 activities abrogated cell survival and in vivo tumor initiation, despite having only subtle effects on MaCSC abundance. Using a combinatorial approach that included in silico as well as loss- and gain-of-function in vitro assays, we identified miR-206-mediated repression of the pro-apoptotic molecules programmed cell death 4 (PDCD4) and connexin 43 (CX43/GJA1). Depletion of either of these two miR-206-regulated transcripts promoted resistance to anoikis, a prominent feature of CSCs, but did not consistently alter MaCSC abundance. Consistent with increased levels of miR-206 in MaCSCs, the expression of both PDCD4 and CX43 was suppressed in these cells relative to control cells. These results identify miR-206 as an effector of KLF4-mediated prosurvival signaling in MaCSCs through repression of PDCD4 and CX43. Consequently, our study suggests that a pluripotency factor exerts prosurvival signaling in MaCSCs, and that antagonism of KLF4-miR-206 signaling may selectively target the MaCSC niche in TNBC.
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Benton G, DeGray G, Kleinman HK, George J, Arnaoutova I. In vitro microtumors provide a physiologically predictive tool for breast cancer therapeutic screening. PLoS One 2015; 10:e0123312. [PMID: 25856378 PMCID: PMC4391795 DOI: 10.1371/journal.pone.0123312] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 03/03/2015] [Indexed: 12/14/2022] Open
Abstract
Many anti-cancer drugs fail in human trials despite showing efficacy in preclinical models. It is clear that the in vitro assays involving 2D monoculture do not reflect the complex extracellular matrix, chemical, and cellular microenvironment of the tumor tissue, and this may explain the failure of 2D models to predict clinical efficacy. We first optimized an in vitro microtumor model using a tumor-aligned ECM, a tumor-aligned medium, MCF-7 and MDA-MB-231 breast cancer spheroids, human umbilical vein endothelial cells, and human stromal cells to recapitulate the tissue architecture, chemical environment, and cellular organization of a growing and invading tumor. We assayed the microtumor for cell proliferation and invasion in a tumor-aligned extracellular matrix, exhibiting collagen deposition, acidity, glucose deprivation, and hypoxia. We found maximal proliferation and invasion when the multicellular spheroids were cultured in a tumor-aligned medium, having low pH and low glucose, with 10% fetal bovine serum under hypoxic conditions. In a 7-day assay, varying doses of fluorouracil or paclitaxel had differential effects on proliferation for MCF-7 and MDA-MB-231 tumor spheroids in microtumor compared to 2D and 3D monoculture. The microtumors exhibited a tumor morphology and drug response similar to published xenograft data, thus demonstrating a more physiologically predictive in vitro model.
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Affiliation(s)
- Gabriel Benton
- Trevigen Inc., Gaithersburg, MD, United States of America
| | - Gerald DeGray
- Trevigen Inc., Gaithersburg, MD, United States of America
| | | | - Jay George
- Trevigen Inc., Gaithersburg, MD, United States of America
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Yang M, Liu R, Li X, Liao J, Pu Y, Pan E, Yin L, Wang Y. miRNA-183 suppresses apoptosis and promotes proliferation in esophageal cancer by targeting PDCD4. Mol Cells 2014; 37:873-80. [PMID: 25518924 PMCID: PMC4275704 DOI: 10.14348/molcells.2014.0147] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 09/20/2014] [Accepted: 09/22/2014] [Indexed: 02/08/2023] Open
Abstract
In our previous study, miRNA-183, a miRNA in the miR-96-182-183 cluster, was significantly over-expressed in esophageal squamous cell carcinoma (ESCC). In the present study, we explored the oncogenic roles of miR-183 in ESCC by gain and loss of function analysis in an esophageal cancer cell line (EC9706). Genome-wide mRNA microarray was applied to determine the genes that were regulated directly or indirectly by miR-183. 3'UTR luciferase reporter assay, RT-PCR, and Western blot were conducted to verify the target gene of miR-183. Cell culture results showed that miR-183 inhibited apoptosis (p < 0.05), enhanced cell proliferation (p < 0.05), and accelerated G1/S transition (p < 0.05). Moreover, the inhibitory effect of miR-183 on apoptosis was rescued when miR-183 was suppressed via miR-183 inhibitor (p < 0.05). Western blot analysis showed that the expression of programmed cell death 4 (PDCD4), which was predicted as the target gene of miR-183 by microarray profiling and bioinformatics predictions, decreased when miR-183 was over-expressed. The 3'UTR luciferase reporter assay confirmed that miR-183 directly regulated PDCD4 by binding to sequences in the 3'UTR of PDCD4. Pearson correlation analysis further confirmed the significant negative correlation between miR-183 and PDCD4 in both cell lines and in ESCC patients. Our data suggest that miR-183 might play an oncogenic role in ESCC by regulating PDCD4 expression.
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Affiliation(s)
- Miao Yang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009,
China
| | - Ran Liu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009,
China
| | - Xiajun Li
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009,
China
| | - Juan Liao
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009,
China
| | - Yuepu Pu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009,
China
| | - Enchun Pan
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009,
China
| | - Lihong Yin
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009,
China
| | - Yi Wang
- Huaian Center for Disease Control and Prevention, Huaian 223001,
China
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Fay MM, Clegg JM, Uchida KA, Powers MA, Ullman KS. Enhanced arginine methylation of programmed cell death 4 protein during nutrient deprivation promotes tumor cell viability. J Biol Chem 2014; 289:17541-52. [PMID: 24764298 DOI: 10.1074/jbc.m113.541300] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The role of programmed cell death 4 (PDCD4) in tumor biology is context-dependent. PDCD4 is described as a tumor suppressor, but its coexpression with protein arginine methyltransferase 5 (PRMT5) promotes accelerated tumor growth. Here, we report that PDCD4 is methylated during nutrient deprivation. Methylation occurs because of increased stability of PDCD4 protein as well as increased activity of PRMT5 toward PDCD4. During nutrient deprivation, levels of methylated PDCD4 promote cell viability, which is dependent on an enhanced interaction with eIF4A. Upon recovery from nutrient deprivation, levels of methylated PDCD4 are regulated by phosphorylation, which controls both the localization and stability of methylated PDCD4. This study reveals that, in response to particular environmental cues, the role of PDCD4 is up-regulated and is advantageous for cell viability. These findings suggest that the methylated form of PDCD4 promotes tumor viability during nutrient deprivation, ultimately allowing the tumor to grow more aggressively.
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Affiliation(s)
- Marta M Fay
- From the Oncological Sciences Department, Huntsman Cancer Institute and
| | - James M Clegg
- From the Oncological Sciences Department, Huntsman Cancer Institute and
| | - Kimberly A Uchida
- From the Oncological Sciences Department, Huntsman Cancer Institute and Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112
| | - Matthew A Powers
- From the Oncological Sciences Department, Huntsman Cancer Institute and
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Hwang SK, Baker AR, Young MR, Colburn NH. Tumor suppressor PDCD4 inhibits NF-κB-dependent transcription in human glioblastoma cells by direct interaction with p65. Carcinogenesis 2014; 35:1469-80. [PMID: 24413684 DOI: 10.1093/carcin/bgu008] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
PDCD4 is a tumor suppressor induced by apoptotic stimuli that regulates both translation and transcription. Previously, we showed that overexpression of PDCD4 leads to decreased anchorage-independent growth in glioblastoma (GBM)-derived cell lines and decreased tumor growth in a GBM xenograft model. In inflammatory cells, PDCD4 stimulates tumor necrosis factor-induced activation of the transcription factor NF-κB, an oncogenic driver in many cancer sites. However, the effect of PDCD4 on NF-κB transcriptional activity in most cancers including GBM is still unknown. We studied the effect of PDCD4 on NF-κB-dependent transcriptional activity in GBM by stably overexpressing PDCD4 in U251 and LN229 cells. Stable PDCD4 expression inhibits NF-κB transcriptional activation measured by a luciferase reporter. The molecular mechanism by which PDCD4 inhibits NF-κB transcriptional activation does not involve inhibited expression of NF-κB p65 or p50 proteins. PDCD4 does not inhibit pathways upstream of NF-κB including the activation of IKKα and IKKβ kinases or degradation of IκBα, events needed for nuclear transport of p65 and p50. PDCD4 overexpression does inhibit localization of p65 but not p50 in the nucleus. PDCD4 protein interacts preferentially with p65 protein as shown by co-immunoprecipitation and confocal imaging. PDCD4 overexpression inhibits the mRNA expression of two NF-κB target genes in a p65-dependent manner. These results suggest that PDCD4 can significantly inhibit NF-κB activity in GBM cells by a mechanism that involves direct or indirect protein-protein interaction independent of the expected mRNA-selective translational inhibition. These findings offer novel opportunities for NF-κB-targeted interventions to prevent or treat cancer.
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Affiliation(s)
- Soon-Kyung Hwang
- Laboratory of Cancer Prevention, Center for Cancer Research, National Cancer Institute, Frederick National Laboratory, 1050 Boyles Street, Bldg 576, Rm 101, Frederick, MD 21702, USA
| | - Alyson R Baker
- Laboratory of Cancer Prevention, Center for Cancer Research, National Cancer Institute, Frederick National Laboratory, 1050 Boyles Street, Bldg 576, Rm 101, Frederick, MD 21702, USA
| | - Matthew R Young
- Laboratory of Cancer Prevention, Center for Cancer Research, National Cancer Institute, Frederick National Laboratory, 1050 Boyles Street, Bldg 576, Rm 101, Frederick, MD 21702, USA
| | - Nancy H Colburn
- Laboratory of Cancer Prevention, Center for Cancer Research, National Cancer Institute, Frederick National Laboratory, 1050 Boyles Street, Bldg 576, Rm 101, Frederick, MD 21702, USA
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Kakade D, Islam N, Maeda N, Adegoke OAJ. Differential effects of PDCD4 depletion on protein synthesis in myoblast and myotubes. BMC Cell Biol 2014; 15:2. [PMID: 24405715 PMCID: PMC3893489 DOI: 10.1186/1471-2121-15-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Accepted: 01/04/2014] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Reduced muscle mass is a hallmark of metabolic diseases like diabetes and cancer. The mammalian (mechanistic) target of rapamycin complex 1/S6 kinase 1 (mTORC1/S6K1) pathway is critical to the regulation of muscle protein synthesis and mass but its mechanism of action is not completely understood. RESULTS Using L6 myotubes, we characterized the regulation of programmed cell death 4 (PDCD4), a recently described substrate of S6K1. The abundance, but not Ser67 phosphorylation, of PDCD4 was sensitive to amino acid and serum deprivation: values in starved cells were 4.5X of control (P < 0.001). Refeeding had opposite effects. Growth factors, compared to amino acids, appeared more critical in regulating PDCD4 abundance. Furthermore, inhibition of mTORC1 or the proteasome prevented the refeeding-associated decrease in PDCD4 abundance. Amino acid and serum deprivation significantly increased PDCD4 binding to eIF4A (P < 0.05); this was reversed during refeeding. PDCD4 depletion by RNA interference had no significant effect on phenylalanine incorporation into myotube mixed proteins in control cells but further suppressed (30%) this measure in nutrient-deprived cells (P < 0.0005). This was not observed in myoblasts. In starved myotubes, PDCD4 depletion further reduced the association of eIF4G with eIF4E. CONCLUSION Our data suggest that in myotubes, PDCD4 abundance is sensitive to nutritional manipulation in an mTORC1 and proteasome depended manner. Furthermore, the role of PDCD4 in regulating protein synthesis appears dependent on the developmental state of the cell.
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Affiliation(s)
| | | | | | - Olasunkanmi A J Adegoke
- School of Kinesiology & Health Science and Muscle Health Research Centre, York University, 4700 Keele Street, Toronto, Ontario M3J 1P3, Canada.
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Down-regulation of programmed cell death 4 leads to epithelial to mesenchymal transition and promotes metastasis in mice. Eur J Cancer 2013; 49:1761-70. [PMID: 23312883 DOI: 10.1016/j.ejca.2012.12.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 10/15/2012] [Accepted: 12/12/2012] [Indexed: 01/31/2023]
Abstract
In this study, we demonstrated that knockdown of programmed cell death 4 (Pdcd4), a novel tumour suppressor, decreased the expressions of epithelial-specific proteins and increased the expressions of mesenchymal-specific proteins in vitro and in vivo, suggesting that knockdown of Pdcd4 results in epithelial to mesenchymal transition (EMT). Knockdown of Pdcd4 increased the rate of wound closure and migration capacity in wound-healing assays and Boyden chamber migration assays, respectively, indicating that Pdcd4 knockdown promotes cell migration. Pdcd4 knockdown also altered the adhesion capacity of GEO cells to extracellular matrix including laminin, collagen IV and fibronectin. To test whether knockdown of Pdcd4 promotes metastasis in vivo, parental, control and Pdcd4 knockdown cells were injected into the caecal wall (orthotopic implantation) of nude mice. Tumours are formed on caecum in all injected mice. However, only mice injected with Pdcd4 knockdown cells developed hepatic and local lymph node metastases. Immunohistochemical staining analyses showed that c-Myc and Snail/Slug expressions were up-regulated in the tumours derived from injection of Pdcd4 knockdown cells. These results implicated that promotion of metastasis by Pdcd4 knockdown was contributed by up-regulation of c-Myc and Snail/Slug in nude mice. Taken together, our data demonstrated that knockdown of Pdcd4 leads to EMT, alternation of adhesion and promotion of migration and metastasis.
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Tsai YP, Wu KJ. Hypoxia-regulated target genes implicated in tumor metastasis. J Biomed Sci 2012; 19:102. [PMID: 23241400 PMCID: PMC3541338 DOI: 10.1186/1423-0127-19-102] [Citation(s) in RCA: 158] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 12/05/2012] [Indexed: 02/07/2023] Open
Abstract
Hypoxia is an important microenvironmental factor that induces cancer metastasis. Hypoxia/hypoxia-inducible factor-1α (HIF-1α) regulates many important steps of the metastatic processes, especially epithelial-mesenchymal transition (EMT) that is one of the crucial mechanisms to cause early stage of tumor metastasis. To have a better understanding of the mechanism of hypoxia-regulated metastasis, various hypoxia/HIF-1α-regulated target genes are categorized into different classes including transcription factors, histone modifiers, enzymes, receptors, kinases, small GTPases, transporters, adhesion molecules, surface molecules, membrane proteins, and microRNAs. Different roles of these target genes are described with regards to their relationship to hypoxia-induced metastasis. We hope that this review will provide a framework for further exploration of hypoxia/HIF-1α-regulated target genes and a comprehensive view of the metastatic picture induced by hypoxia.
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Affiliation(s)
- Ya-Ping Tsai
- Institute of Biochemistry & Molecular Biology, National Yang-Ming University, No.155, Li-Nong St., Sec.2, Peitou, Taipei 112, Taiwan
| | - Kou-Juey Wu
- Institute of Biochemistry & Molecular Biology, National Yang-Ming University, No.155, Li-Nong St., Sec.2, Peitou, Taipei 112, Taiwan
- Head and Neck Cancer Research Program, Cancer Research Center, National Yang-Ming University, No.155, Li-Nong St., Sec.2, Peitou, Taipei 112, Taiwan
- Genome Research Center, National Yang-Ming University, Taipei 112, Taiwan
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Wei L, Song XR, Sun JJ, Wang XW, Xie L, Lv LY. Lysyl oxidase may play a critical role in hypoxia-induced NSCLC cells invasion and migration. Cancer Biother Radiopharm 2012; 27:672-7. [PMID: 23140307 DOI: 10.1089/cbr.2012.1241] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Lysyl oxidase (LOX), a copper-dependent amine oxidase known to function both intracellularly and extracellularly, is implicated in promoting tumor progression and hypoxic metastasis in certain malignancies. Nonsmall cell lung cancer (NSCLC) is a highly aggressive cancer with poor prognosis worldwide. However, the role and molecular mechanism by which LOX involving in hypoxic NSCLC invasion and migration are poorly understood. This study explores the effect of LOX on invasion and migration of NSCLC cells under hypoxic conditions. Small interfering RNA (siRNA) targeting LOX was used to silence LOX expression of hypoxic NSCLC cells, SPCA1 and A549. Cellular invasive and migratory potentials were determined by matrigel invasion and migration assays. Expression of LOX, Src, Src activation (Tyr418 phosphorylation of Src), and Snail were evaluated by real-time PCR and western blot, respectively. The results showed that LOX mRNA and protein expression were upregulated under hypoxic conditions in NSCLC cells. Knockdown of LOX led to inhibition of hypoxia-induced invasion and migration. Phosphorylated Src (Tyr418) and Snail proteins were decreased along with LOX downregulation. Our data provide molecular evidences that LOX is mechanistically linked to increased invasion and migration of hypoxic NSCLC cells, and may serve as an antimetastasis target of human NSCLC.
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Affiliation(s)
- Ling Wei
- 1 Shandong Provincial Key Laboratory of Radiation Oncology , Shandong Cancer Hospital and Institute, Jinan, The People's Republic of China
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Dikshit B, Irshad K, Madan E, Aggarwal N, Sarkar C, Chandra PS, Gupta DK, Chattopadhyay P, Sinha S, Chosdol K. FAT1 acts as an upstream regulator of oncogenic and inflammatory pathways, via PDCD4, in glioma cells. Oncogene 2012; 32:3798-808. [DOI: 10.1038/onc.2012.393] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Cirri P, Chiarugi P. Cancer-associated-fibroblasts and tumour cells: a diabolic liaison driving cancer progression. Cancer Metastasis Rev 2012; 31:195-208. [PMID: 22101652 DOI: 10.1007/s10555-011-9340-x] [Citation(s) in RCA: 366] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Several recent papers have now provided compelling experimental evidence that the progression of tumours towards a malignant phenotype does not depend exclusively on the cell-autonomous properties of cancer cells themselves but is also deeply influenced by tumour stroma reactivity, thereby undergoing a strict environmental control. Tumour microenvironmental elements include structural components such as the extracellular matrix or hypoxia as well as stromal cells, either resident cells or recruited from circulating precursors, as macrophages and other inflammatory cells, endothelial cells and cancer-associated fibroblasts (CAFs). All these elements synergistically play a specific role in cancer progression. This review summarizes our current knowledge on the role of CAFs in tumour progression, with a particular focus on the biunivocal interplay between CAFs and cancer cells leading to the activation of the epithelial-mesenchymal transition programme and the achievement of stem cell traits, as well as to the metabolic reprogramming of both stromal and cancer cells. Recent advances on the role of CAFs in the preparation of metastatic niche, as well as the controversial origin of CAFs, are discussed in light of the new emerging therapeutic implications of targeting CAFs.
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Affiliation(s)
- Paolo Cirri
- Department of Biochemical Science, University of Florence, Florence, Italy
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Guo X, Li W, Wang Q, Yang HS. AKT Activation by Pdcd4 Knockdown Up-Regulates Cyclin D1 Expression and Promotes Cell Proliferation. Genes Cancer 2012; 2:818-28. [PMID: 22393466 DOI: 10.1177/1947601911431082] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 09/13/2011] [Accepted: 11/02/2011] [Indexed: 12/15/2022] Open
Abstract
Programmed cell death 4 (Pdcd4), a novel tumor suppressor, inhibits neoplastic transformation and tumor invasion. In this study, the authors found that knockdown of Pdcd4 promoted cell proliferation and up-regulated cyclin D1 expression. Previously, the authors demonstrated that Pdcd4 knockdown activated NF-κB-dependent transcription. Mutations of NF-κB binding sites on the cyclin D1 promoter attenuated the cyclin D1 promoter activity induced by Pdcd4 knockdown. In addition, knockdown of NF-κB/IκB kinase (IKK) α or IKKβ, the kinase regulating NF-κB activation, inhibited cyclin D1 promoter activity and cyclin D1 expression, indicating that up-regulation of cyclin D1 by Pdcd4 knockdown is contributed, at least in part, by NF-κB activation. To investigate the mechanism of how Pdcd4 knockdown activates NF-κB, the authors found that the levels of AKT phosphorylation and AKT kinase activity were increased in the Pdcd4 knockdown cells. Conversely, ectopic expression of Pdcd4 inhibited AKT phosphorylation and cyclin D1 expression, suggesting that Pdcd4 regulates AKT activity and cyclin D1 expression. Furthermore, knockdown of AKT in the Pdcd4 knockdown cells inhibited IKK phosphorylation, NF-κB activation, cyclin D1 promoter activity, and cyclin D1 expression as well as cell proliferation. Taken together, these findings suggest that activation of NF-κB by Pdcd4 knockdown through AKT contributes to the elevated expression of cyclin D1, thus providing new insights into how loss of Pdcd4 expression promotes tumor development.
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Affiliation(s)
- Xiaoling Guo
- Graduate Center for Toxicology, College of Medicine, University of Kentucky, Lexington, KY, USA
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Neilsen PM, Noll JE, Mattiske S, Bracken CP, Gregory PA, Schulz RB, Lim SP, Kumar R, Suetani RJ, Goodall GJ, Callen DF. Mutant p53 drives invasion in breast tumors through up-regulation of miR-155. Oncogene 2012; 32:2992-3000. [DOI: 10.1038/onc.2012.305] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Wang Q, Zhang Y, Yang HS. Pdcd4 knockdown up-regulates MAP4K1 expression and activation of AP-1 dependent transcription through c-Myc. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1823:1807-14. [PMID: 22801218 DOI: 10.1016/j.bbamcr.2012.07.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Revised: 07/03/2012] [Accepted: 07/06/2012] [Indexed: 12/16/2022]
Abstract
Programmed cell death 4 (Pdcd4) is a novel tumor suppressor, whose expression is frequently down-regulated in several types of cancers. In the present study, we demonstrated that Pdcd4 knockdown up-regulates MAP kinase kinase kinase kinase 1 (MAP4K1) expression and increases phosphorylation of c-Jun. Over-expression of c-Myc in HEK293 cells increases the levels of MAP4K1, MAP4K1 promoter activity, and phospho-c-Jun. Mutation analysis showed that the c-Myc binding site at -536bp (relative to the initiation ATG) of map4k1 promoter responds to c-Myc regulation. In addition, chromatin immunoprecipitation demonstrated that c-Myc directly binds to map4k1 promoter at this site. Down-regulation of c-Myc reverses MAP4K1 expression and AP-1 activation in Pdcd4 knockdown cells. Moreover, over-expression of dominant negative Tcf4 decreases expression of c-Myc and MAP4K1, JNK activation, and AP-1 dependent transcription. Thus, activation of β-catenin/Tcf dependent transcription in Pdcd4 knockdown cells up-regulates MAP4K1 expression and AP-1 activity via c-Myc. The study presented here further reveals in detail the mechanism of how Pdcd4 inhibits tumor cell invasion and provides a functional connection between β-catenin/Tcf and AP-1 dependent transcription.
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Affiliation(s)
- Qing Wang
- Graduate Center for Toxicology, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
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Perspectives on some recent studies on RAMPs. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 744:105-12. [PMID: 22434111 DOI: 10.1007/978-1-4614-2364-5_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
This book on RAMPs covers a number of aspects on the biology of RAMPs. However, due to the uniqueness of some recent studies, they were not covered under a general title. Therefore, in this chapter, we describe three recent studies wherein RAMPs were found to be important players in cancer, hypertension and asthma.
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50
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Otranto M, Sarrazy V, Bonté F, Hinz B, Gabbiani G, Desmoulière A. The role of the myofibroblast in tumor stroma remodeling. Cell Adh Migr 2012; 6:203-19. [PMID: 22568985 PMCID: PMC3427235 DOI: 10.4161/cam.20377] [Citation(s) in RCA: 182] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Since its first description in wound granulation tissue, the myofibroblast has been recognized to be a key actor in the epithelial-mesenchymal cross-talk that plays a crucial role in many physiological and pathological situations, such as regulation of prostate development, ventilation-perfusion in lung alveoli or organ fibrosis. The presence of myofibroblasts in the stroma reaction to epithelial tumors is well established and many data are accumulating which suggest that the stroma compartment is an active participant in tumor onset and/or evolution. In this review we summarize the evidence in favor of this concept, the main mechanisms that regulate myofibroblast differentiation and function, as well as the biophysical and biochemical factors possibly involved in epithelial-stroma interactions, using liver carcinoma as main model, in view of achieving a better understanding of tumor progression mechanisms and of tools directed toward stroma as eventual therapeutic target.
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Affiliation(s)
- Marcela Otranto
- Department of Physiology, Faculty of Pharmacy, University of Limoges, Limoges, France
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