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Zhang XH, Wu SW, Feng YF, Xie YQ, Li M, Hu P, Cao Y. ZBTB7A regulates LncRNA HOTAIR-mediated ELAVL1/SOX17 axis to inhibit malignancy and angiogenesis in endometrial carcinoma. J Cancer Res Clin Oncol 2024; 150:345. [PMID: 38981872 PMCID: PMC11233420 DOI: 10.1007/s00432-024-05860-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 06/19/2024] [Indexed: 07/11/2024]
Abstract
BACKGROUND Endometrial cancer (EC) is the sixth most frequent cancer in women worldwide and has higher fatality rates. The pathophysiology of EC is complex, and there are currently no reliable methods for diagnosing and treating the condition. Long non-coding RNA (lncRNA), according to mounting evidence, is vital to the pathophysiology of EC. HOTAIR is regarded as a significant prognostic indicator of EC. ZBTB7A decreased EC proliferation and migration, according to recent studies, however the underlying mechanism still needs to be clarified. METHODS The research utilized RT-qPCR to measure HOTAIR expression in clinical EC tissues and various EC cell lines. Kaplan-Meier survival analysis was employed to correlate HOTAIR levels with patient prognosis. Additionally, the study examined the interaction between ZBTB7A and HOTAIR using bioinformatics tools and ChIP assays. The experimental approach also involved manipulating the expression levels of HOTAIR and ZBTB7A in EC cell lines and assessing the impact on various cellular processes and gene expression. RESULTS The study found significantly higher levels of HOTAIR in EC tissues compared to adjacent normal tissues, with high HOTAIR expression correlating with poorer survival rates and advanced cancer characteristics. EC cell lines like HEC-1 A and KLE showed higher HOTAIR levels compared to normal cells. Knockdown of HOTAIR in these cell lines reduced proliferation, angiogenesis, and migration. ZBTB7A was found to be inversely correlated with HOTAIR, and its overexpression led to a decrease in HOTAIR levels and a reduction in malignant cell behaviors. The study also uncovered that HOTAIR interacts with ELAVL1 to regulate SOX17, which in turn activates the Wnt/β-catenin pathway, promoting malignant behaviors in EC cells. CONCLUSION HOTAIR is a critical regulator in EC, contributing to tumor growth and poor prognosis. Its interaction with ZBTB7A and regulation of SOX17 via the Wnt/β-catenin pathway underlines its potential as a therapeutic target.
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Affiliation(s)
- Xiao-Hui Zhang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230022, P. R. China
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
| | - Shu-Wei Wu
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230022, P. R. China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
| | - Yi-Fan Feng
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230022, P. R. China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
| | - Yang-Qin Xie
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230022, P. R. China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
| | - Min Li
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230022, P. R. China
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China
| | - Ping Hu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, 230022, P. R. China
| | - Yunxia Cao
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230022, P. R. China.
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China.
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China.
- Anhui Province Key Laboratory of Reproductive Health and Genetics, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China.
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, 218, Jixi Road, Hefei, Anhui Province, 230032, P. R. China.
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Liu M, Xu C, Yang H, Jiang Q, Chen G, Wang W, Shao T, Deng T, Yuan F, Xie P, Zhou H. Pro-oncogene FBI-1 inhibits the ferroptosis of prostate carcinoma PC-3 cells via the microRNA-324-3p/GPX4 axis. J Cancer 2024; 15:4097-4112. [PMID: 38947389 PMCID: PMC11212100 DOI: 10.7150/jca.96306] [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: 03/15/2024] [Accepted: 05/06/2024] [Indexed: 07/02/2024] Open
Abstract
Ferroptosis has been characterized as non-apoptotic programmed cell death and is considered a novel strategy for antitumor treatment. The factor that binds to inducer of short transcripts-1 (FBI-1) is an important proto-oncogene playing multiple roles in human malignancies and the development of resistance to therapy. However, the roles of FBI-1 in ferroptosis of endocrine independent prostate carcinoma are still unknown. The results of this study showed that FBI-1 inhibited the ferroptosis of prostate carcinoma PC-3 cells (a typical endocrine-independent prostate carcinoma cell line) via the miR-324-3p/glutathione peroxidase 4 (miR-324-3p/GPX4) axis. Overexpression of FBI-1 enhanced the expression levels of GPX4. In contrast, knockdown of FBI-1 decreased the expression of GPX4 and induced the ferroptosis of PC-3 cells. The miR-324-3p decreased the expression of GPX4 by targeting the 3'-untranslated region of GPX4 to induce ferroptosis. Notably, FBI-1 increased the expression of GPX4 by repressing the levels of miR-324-3p. The transcription of miR-324-3p was mediated by specificity protein 1 (SP1), and FBI-1 repressed the expression of miR-324-3p by repressing the activation of SP1. In clinical specimens, the endogenous levels of FBI-1 were positively associated with Glutathione Peroxidase 4 (GPX4) and negatively related with the expression of miR-324-3p. Therefore, the results indicated that the miR-324-3p/GPX4 axis participates in the FBI-1-mediated ferroptosis of prostate carcinoma cells.
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Affiliation(s)
- Mingsheng Liu
- Second Ward of Urology, Qujing Affiliated Hospital of Kunming Medical University, Qujing City 655000, Yunnan Province, People's Republic of China
| | - Chenxiang Xu
- Second Ward of Urology, Qujing Affiliated Hospital of Kunming Medical University, Qujing City 655000, Yunnan Province, People's Republic of China
| | - Hua Yang
- Department of the Medical Oncology / the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy; the Affiliated Hospital of Hebei University; Baoding City 071000, Hebei province, People's Republic of China
| | - Qiyu Jiang
- Institute of Infectious Diseases, Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, 100 Middle Street of 4th West Ring Road, Beijing, 100039, China
| | - Guanyu Chen
- Second Ward of Urology, Qujing Affiliated Hospital of Kunming Medical University, Qujing City 655000, Yunnan Province, People's Republic of China
| | - Wei Wang
- Second Ward of Urology, Qujing Affiliated Hospital of Kunming Medical University, Qujing City 655000, Yunnan Province, People's Republic of China
| | - Tao Shao
- Second Ward of Urology, Qujing Affiliated Hospital of Kunming Medical University, Qujing City 655000, Yunnan Province, People's Republic of China
| | - Tibin Deng
- Second Ward of Urology, Qujing Affiliated Hospital of Kunming Medical University, Qujing City 655000, Yunnan Province, People's Republic of China
| | - Fei Yuan
- Second Ward of Urology, Qujing Affiliated Hospital of Kunming Medical University, Qujing City 655000, Yunnan Province, People's Republic of China
| | - Pingbo Xie
- Second Ward of Urology, Qujing Affiliated Hospital of Kunming Medical University, Qujing City 655000, Yunnan Province, People's Republic of China
| | - Hongqing Zhou
- Second Ward of Urology, Qujing Affiliated Hospital of Kunming Medical University, Qujing City 655000, Yunnan Province, People's Republic of China
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3
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Choi SH, Cho SY, Park SY, Hur MW. Post-translational regulation of proto-oncogene ZBTB7A expression by p53 status in cancer cells: HSP90-dependent stabilization vs. p53-KLHL20-ubiquitin proteasomal degradation. BIOCHIMICA ET BIOPHYSICA ACTA (BBA) - GENE REGULATORY MECHANISMS 2023; 1866:194931. [PMID: 37011832 DOI: 10.1016/j.bbagrm.2023.194931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 03/18/2023] [Accepted: 03/21/2023] [Indexed: 04/03/2023]
Abstract
ZBTB7A overexpressed in many human cancers is a major oncogenic driver. ZBTB7A promotes tumorigenesis by regulating transcription of the genes involved in cell survival and proliferation, apoptosis, invasion, and migration/metastasis. One unresolved issue is the mechanism underlying the aberrant overexpression of ZBTB7A in cancer cells. Interestingly, inhibition of HSP90 decreased ZBTB7A expression in a variety of human cancer cells. ZBTB7A interacts with and is stabilized by HSP90. Inhibition of HSP90 by 17-AAG resulted in p53-dependent proteolysis of ZBTB7A via increased p53 expression and upregulation of the CUL3-dependent E3 ubiquitin ligase, KLHL20. Down-regulation of ZBTB7A resulted in the derepression of a major negative regulator of cell cycle progression, p21/CDKN1A. We discovered a new function of p53 regulating ZBTB7A expression through KLHL20-E3 ligase and proteasomal protein degradation system.
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4
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Bae SY, Bergom HE, Day A, Greene JT, Sychev ZE, Larson G, Corey E, Plymate SR, Freedman TS, Hwang JH, Drake JM. ZBTB7A as a novel vulnerability in neuroendocrine prostate cancer. Front Endocrinol (Lausanne) 2023; 14:1093332. [PMID: 37065756 PMCID: PMC10090553 DOI: 10.3389/fendo.2023.1093332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 02/08/2023] [Indexed: 03/31/2023] Open
Abstract
Neuroendocrine prostate cancer (NEPC) is a highly aggressive subtype of prostate cancer. NEPC is characterized by the loss of androgen receptor (AR) signaling and transdifferentiation toward small-cell neuroendocrine (SCN) phenotypes, which results in resistance to AR-targeted therapy. NEPC resembles other SCN carcinomas clinically, histologically and in gene expression. Here, we leveraged SCN phenotype scores of various cancer cell lines and gene depletion screens from the Cancer Dependency Map (DepMap) to identify vulnerabilities in NEPC. We discovered ZBTB7A, a transcription factor, as a candidate promoting the progression of NEPC. Cancer cells with high SCN phenotype scores showed a strong dependency on RET kinase activity with a high correlation between RET and ZBTB7A dependencies in these cells. Utilizing informatic modeling of whole transcriptome sequencing data from patient samples, we identified distinct gene networking patterns of ZBTB7A in NEPC versus prostate adenocarcinoma. Specifically, we observed a robust association of ZBTB7A with genes promoting cell cycle progression, including apoptosis regulating genes. Silencing ZBTB7A in a NEPC cell line confirmed the dependency on ZBTB7A for cell growth via suppression of the G1/S transition in the cell cycle and induction of apoptosis. Collectively, our results highlight the oncogenic function of ZBTB7A in NEPC and emphasize the value of ZBTB7A as a promising therapeutic strategy for targeting NEPC tumors.
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Affiliation(s)
- Song Yi Bae
- Department of Pharmacology, University of Minnesota-Twin Cities, Minneapolis, MN, United States
| | - Hannah E. Bergom
- Department of Medicine, University of Minnesota-Twin Cities, Minneapolis, MN, United States
- Division of Hematology, Oncology and Transplantation, University of Minnesota, Minneapolis, MN, United States
| | - Abderrahman Day
- Department of Medicine, University of Minnesota-Twin Cities, Minneapolis, MN, United States
- Division of Hematology, Oncology and Transplantation, University of Minnesota, Minneapolis, MN, United States
- Institute for Health Informatics, University of Minnesota, Minneapolis, MN, United States
| | - Joseph T. Greene
- Department of Pharmacology, University of Minnesota-Twin Cities, Minneapolis, MN, United States
| | - Zoi E. Sychev
- Department of Pharmacology, University of Minnesota-Twin Cities, Minneapolis, MN, United States
| | - Gabrianne Larson
- Department of Pharmacology, University of Minnesota-Twin Cities, Minneapolis, MN, United States
| | - Eva Corey
- Department of Urology, University of Washington, Seattle, WA, United States
| | - Stephen R. Plymate
- Department of Medicine, Division of Gerontology and Geriatric Medicine, University of Washington, Seattle, WA, United States
- Geriatric Research, Education, and Clinical Center, Veterans Affairs (VA) Puget Sound Health Care System, Seattle, WA, United States
| | - Tanya S. Freedman
- Department of Pharmacology, University of Minnesota-Twin Cities, Minneapolis, MN, United States
- Masonic Cancer Center, University of Minnesota-Twin Cities, Minneapolis, MN, United States
- Center for Immunology, University of Minnesota, Minneapolis, MN, United States
| | - Justin H. Hwang
- Department of Medicine, University of Minnesota-Twin Cities, Minneapolis, MN, United States
- Division of Hematology, Oncology and Transplantation, University of Minnesota, Minneapolis, MN, United States
- Department of Urology, University of Washington, Seattle, WA, United States
| | - Justin M. Drake
- Department of Pharmacology, University of Minnesota-Twin Cities, Minneapolis, MN, United States
- Department of Urology, University of Washington, Seattle, WA, United States
- Department of Urology, University of Minnesota-Twin Cities, Minneapolis, MN, United States
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5
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Ren R, Horton JR, Chen Q, Yang J, Liu B, Huang Y, Blumenthal RM, Zhang X, Cheng X. Structural basis for transcription factor ZBTB7A recognition of DNA and effects of ZBTB7A somatic mutations that occur in human acute myeloid leukemia. J Biol Chem 2023; 299:102885. [PMID: 36626981 PMCID: PMC9932118 DOI: 10.1016/j.jbc.2023.102885] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/27/2022] [Accepted: 12/29/2022] [Indexed: 01/09/2023] Open
Abstract
ZBTB7A belongs to a small family of transcription factors having three members in humans (7A, 7B, and 7C). They share a BTB/POZ protein interaction domain at the amino end and a zinc-finger DNA-binding domain at the carboxyl end. They control the transcription of a wide range of genes, having varied functions in hematopoiesis, oncogenesis, and metabolism (in particular glycolysis). ZBTB7A-binding profiles at gene promoters contain a consensus G(a/c)CCC motif, followed by a CCCC sequence in some instances. Structural and mutational investigations suggest that DNA-specific contacts with the four-finger tandem array of ZBTB7A are formed sequentially, initiated from ZF1-ZF2 binding to G(a/c)CCC before spreading to ZF3-ZF4, which bind the DNA backbone and the 3' CCCC sequence, respectively. Here, we studied some mutations found in t(8;21)-positive acute myeloid leukemia patients that occur within the ZBTB7A DNA-binding domain. We determined that these mutations generally impair ZBTB7A DNA binding, with the most severe disruptions resulting from mutations in ZF1 and ZF2, and the least from a frameshift mutation in ZF3 that results in partial mislocalization. Information provided here on ZBTB7A-DNA interactions is likely applicable to ZBTB7B/C, which have overlapping functions with ZBTB7A in controlling primary metabolism.
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Affiliation(s)
- Ren Ren
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - John R Horton
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Qin Chen
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jie Yang
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Bin Liu
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Yun Huang
- Center for Epigenetics and Disease Prevention, Institute of Biosciences and Technology, College of Medicine, Texas A&M University, Houston, Texas, USA
| | - Robert M Blumenthal
- Department of Medical Microbiology and Immunology, and Program in Bioinformatics, The University of Toledo College of Medicine and Life Sciences, Toledo, Ohio, USA
| | - Xing Zhang
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
| | - Xiaodong Cheng
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
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Huang Y, Cai L, Duan Y, Zeng Q, He M, Wu Z, Zou X, Zhou M, Zhang Z, Xiao S, Yang B, Ma J, Huang L. Whole-genome sequence-based association analyses on an eight-breed crossed heterogeneous stock of pigs reveal the genetic basis of skeletal muscle fiber characteristics. Meat Sci 2022; 194:108974. [PMID: 36167013 DOI: 10.1016/j.meatsci.2022.108974] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 08/02/2022] [Accepted: 09/05/2022] [Indexed: 10/14/2022]
Abstract
Skeletal muscle fiber characteristics (MFCs) have been extensively studied due to their importance to human health and athletic ability, as well as to the quantity and quality of livestock meat production. Hence, we performed a genome-wide association study (GWAS) on nine muscle fiber traits by using whole genome sequence data in an eight-breed crossed heterogeneous stock pig population. This GWAS revealed 67 quantitative trait loci (QTLs) for these traits. The most significant GWAS signal was detected in the region of Sus scrofa chromosome 12 (SSC12) containing the MYH gene family. Notably, we identified a significant SNP rs322008693 (P = 7.52E-09) as the most likely causal mutation for the total number of muscle fibers (TNMF) QTL on SSC1. The results of EMSA and luciferase assays indicated that the rs322008693 SNP resided in a functional element. These findings provide valuable molecular markers for pig meat production selection as well as for deciphering the genetic mechanisms of the muscle fiber physiology.
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Affiliation(s)
- Yizhong Huang
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Liping Cai
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yanyu Duan
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Qingjie Zeng
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Maozhang He
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Zhongping Wu
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Xiaoxiao Zou
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Mengqing Zhou
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Zhou Zhang
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Shijun Xiao
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Bin Yang
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Junwu Ma
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China.
| | - Lusheng Huang
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang 330045, China.
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7
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Zhu X, Trimarco JD, Williams CA, Barrera A, Reddy TE, Heaton NS. ZBTB7A promotes virus-host homeostasis during human coronavirus 229E infection. Cell Rep 2022; 41:111540. [PMID: 36243002 PMCID: PMC9533670 DOI: 10.1016/j.celrep.2022.111540] [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: 05/20/2022] [Revised: 08/24/2022] [Accepted: 09/29/2022] [Indexed: 11/22/2022] Open
Abstract
The cellular fate after infection with human coronaviruses (HCoVs) is typically death. Previous data suggest, however, that the transcriptional state of an individual cell may sometimes allow additional outcomes of infection. Here, to probe the range of interactions a permissive cell type can have with a HCoV, we perform a CRISPR activation screen with HCoV-229E. The screen identified the transcription factor ZBTB7A, which strongly promotes cell survival after infection. Rather than suppressing viral infection, ZBTB7A upregulation allows the virus to induce a persistent infection and homeostatic state with the cell. We also find that control of oxidative stress is a primary driver of cellular survival during HCoV-229E infection. These data illustrate that, in addition to the nature of the infecting virus and the type of cell that it encounters, the cellular gene expression profile prior to infection can affect the eventual fate.
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Affiliation(s)
- Xinyu Zhu
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, USA
| | - Joseph D. Trimarco
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, USA
| | - Courtney A. Williams
- Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, NC, USA,Center for Genomic and Computational Biology, Duke University, Durham, NC, USA,Center for Advanced Genomic Technologies, Duke University, Durham, NC, USA
| | - Alejandro Barrera
- Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, NC, USA,Center for Genomic and Computational Biology, Duke University, Durham, NC, USA,Center for Advanced Genomic Technologies, Duke University, Durham, NC, USA
| | - Timothy E. Reddy
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, USA,Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, NC, USA,Center for Genomic and Computational Biology, Duke University, Durham, NC, USA,Center for Advanced Genomic Technologies, Duke University, Durham, NC, USA,Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Nicholas S. Heaton
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, USA,Duke Human Vaccine Institute, Duke University School of Medicine, Durham, NC, USA,Corresponding author
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8
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Chang K, Do SI, Kim K, Chae SW, Do IG, Lee HJ, Kim DH, Sohn JH. Proto-oncogene Pokemon in thyroid cancer: a potential promoter of tumorigenesis in papillary thyroid carcinoma. J Pathol Transl Med 2021; 55:317-323. [PMID: 34353008 PMCID: PMC8476314 DOI: 10.4132/jptm.2021.06.28] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 06/28/2021] [Indexed: 11/21/2022] Open
Abstract
Background Pokemon is an oncogenic transcription regulator that plays a critical role in cellular differentiation. Although it has been found to be overexpressed in several types of cancer involving different organs, its role in thyroid gland has yet to be reported. The objective of this study was to evaluate the expression of Pokemon in papillary thyroid carcinoma (PTC) based on clinicopathological parameters. Methods Tissue microarray samples derived from patients with PTC or benign thyroid disease were used to evaluate Pokemon expression based on immunohistochemical analysis. Correlations of its expression with various clinicopathological parameters were then analyzed. Results Pokemon expression was observed in 22.0% of thyroid follicular cells from the normal group, 44.0% from the group with benign thyroid diseases, and 92.1% from the group with PTC (p < .001). The intensity of Pokemon expression was markedly higher in the PTC group. Pokemon expression level and PTC tumor size showed an inverse correlation. T1a tumors showed strong expression levels of Pokemon. However, larger tumors showed weak expression (p = .006). Conclusions Pokemon expression is associated with tumorigenesis of PTC, with expression showing an inverse correlation with PTC tumor size. This might be related to the negative regulation of aerobic glycolysis by Pokemon.
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Affiliation(s)
- Kyungseek Chang
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sung-Im Do
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyungeun Kim
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seoung Wan Chae
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - In-Gu Do
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hyun Joo Lee
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Dong Hoon Kim
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jin Hee Sohn
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
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9
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Singh AK, Verma S, Kushwaha PP, Prajapati KS, Shuaib M, Kumar S, Gupta S. Role of ZBTB7A zinc finger in tumorigenesis and metastasis. Mol Biol Rep 2021; 48:4703-4719. [PMID: 34014468 DOI: 10.1007/s11033-021-06405-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 05/08/2021] [Indexed: 02/08/2023]
Abstract
The zinc finger and BTB (broad-complex, tramtrack and bric a brac) domain containing protein 7A (ZBTB7A) is a pleiotropic transcription factor that plays an important role in various stages of cell proliferation, differentiation, and other developmental processes. ZBTB7A is a member of the POK family that directly and specifically binds to short DNA recognition sites located near their target genes thereby acting as transcriptional activator or repressor. ZBTB7A overexpression has been associated with tumorigenesis and metastasis in various human cancer types, including breast, prostate, lung, ovarian, and colon cancer. However in some instances downregulation of ZBTB7A results in tumor progression, suggesting its role as a tumor suppressor. ZBTB7A is involved with complicated regulatory networks which include protein-protein and protein-nucleic acid interactions. ZBTB7A involvement in cancer progression and metastasis is perhaps enabled through the regulation of various signaling pathways depending on the type and genetic context of cancer. The association of ZBTB7A with other proteins affects cancer aggressiveness, therapeutic resistance and clinical outcome. This review focuses on the involvement of ZBTB7A in various signaling pathways and its role in cancer progression. We will also review the literature on ZBTB7A and cancer which could be potentially explored for its therapeutic implications.
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Affiliation(s)
- Atul Kumar Singh
- Molecular Signaling and Drug Discovery Laboratory, Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151401, India
| | - Shiv Verma
- Department of Urology, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA.,Department of Urology, The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, 44106, USA
| | - Prem Prakash Kushwaha
- Molecular Signaling and Drug Discovery Laboratory, Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151401, India
| | - Kumari Sunita Prajapati
- Molecular Signaling and Drug Discovery Laboratory, Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151401, India
| | - Mohd Shuaib
- Molecular Signaling and Drug Discovery Laboratory, Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151401, India
| | - Shashank Kumar
- Molecular Signaling and Drug Discovery Laboratory, Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151401, India.
| | - Sanjay Gupta
- Department of Urology, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA. .,Department of Urology, The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, 44106, USA. .,Department of Nutrition, Case Western Reserve University, Cleveland, OH, 44106, USA. .,Divison of General Medical Sciences, Case Comprehensive Cancer Center, Cleveland, OH, 44106, USA. .,Department of Urology, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, 44106, USA.
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10
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Chen M, Xiao C, Jiang W, Yang W, Qin Q, Tan Q, Lian B, Liang Z, Wei C. Capsaicin Inhibits Proliferation and Induces Apoptosis in Breast Cancer by Down-Regulating FBI-1-Mediated NF-κB Pathway. DRUG DESIGN DEVELOPMENT AND THERAPY 2021; 15:125-140. [PMID: 33469265 PMCID: PMC7811378 DOI: 10.2147/dddt.s269901] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 12/09/2020] [Indexed: 01/15/2023]
Abstract
Background As a natural compound extracted from a variety of hot peppers, capsaicin has drawn increasing attention to its anti-cancer effects against multiple human cancers including breast cancer. FBI-1 is a major proto-oncogene negatively regulating the transcription of many tumor suppressor genes, and plays a vital role in tumorigenesis and progression. However, whether FBI-1 is involved in capsaicin-induced breast cancer suppression has yet to be ascertained. This study aimed to investigate the effects of capsaicin on proliferation and apoptosis and its association with FBI-1 expression in breast cancer. Methods CCK-8 and morphological observation assay were employed to detect cell proliferation. Flow cytometry and TUNEL assay were conducted to detect cell apoptosis. RNA interference technique was used to overexpress or silence FBI-1 expression. qRT-PCR and/or Western blot analysis were applied to detect the protein expression of FBI-1, Ki-67, Bcl-2, Bax, cleaved-Caspase 3, Survivin and NF-κB p65. Xenograft model in nude mice was established to assess the in vivo effects. Results Capsaicin significantly inhibited proliferation and induced apoptosis in breast cancer in vitro and in vivo, along with decreased FBI-1, Ki-67, Bcl-2 and Survivin protein expression, increased Bax protein expression and activated Caspase 3. Furthermore, FBI-1 overexpression obviously attenuated the capsaicin-induced anti-proliferation and pro-apoptosis effect, accompanied with the above-mentioned proteins reversed, whereas FBI-1 silencing generated exactly the opposite response. In addition, as a target gene of FBI-1, NF-κB was inactivated by p65 nuclear translocation suppressed with capsaicin treatment, which was perceptibly weakened with FBI-1 overexpression or enhanced with FBI-1 silencing. Conclusion This study reveals that FBI-1 is closely involved in capsaicin-induced anti-proliferation and pro-apoptosis of breast cancer. The underlying mechanism may be related to down-regulation of FBI-1-mediated NF-κB pathway. Targeting FBI-1 with capsaicin may be a promising therapeutic strategy in patients with breast cancer.
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Affiliation(s)
- Maojian Chen
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Chanchan Xiao
- Department of Microbiology and Immunology, School of Medicine and Public Health, Jinan University, Guangzhou, Guangdong, 510632, People's Republic of China
| | - Wei Jiang
- Department of Medical Oncology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Weiping Yang
- Department of Ultrasound Diagnosis, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Qinghong Qin
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Qixing Tan
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Bin Lian
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Zhijie Liang
- Department of Gland Surgery, The Fifth Affiliated Hospital of Guangxi Medical University & The First People's Hospital of Nanning, Nanning, Guangxi 530022, People's Republic of China
| | - Changyuan Wei
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
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11
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Yang H, Ren L, Wang Y, Bi X, Li X, Wen M, Zhang Q, Yang Y, Jia Y, Li Y, Zang A, Wei Y, Dai G. FBI-1 enhanced the resistance of triple-negative breast cancer cells to chemotherapeutic agents via the miR-30c/PXR axis. Cell Death Dis 2020; 11:851. [PMID: 33051436 PMCID: PMC7554048 DOI: 10.1038/s41419-020-03053-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 09/22/2020] [Accepted: 09/23/2020] [Indexed: 12/12/2022]
Abstract
The factor that binds to the inducer of short transcripts-1 (FBI-1) is a transcription suppressor and an important proto-oncogene that plays multiple roles in carcinogenesis and therapeutic resistance. In the present work, our results indicated that FBI-1 enhanced the resistance of triple-negative breast cancer (TNBC) cells to chemotherapeutic agents by repressing the expression of micoRNA-30c targeting the pregnane X receptor (PXR). The expression of FBI-1 was positively related to PXR and its downstream drug resistance-related genes in TNBC tissues. FBI-1 enhanced the expression of PXR and enhanced the activation of the PXR pathway. The miR-30c decreased the expression of PXR by targeting the 3'-UTR of PXR, and FBI-1 increased the expression of PXR by repressing miR-30c's expression. Through the miR-30c/PXR axis, FBI-1 accelerated the clearance or elimination of antitumor agents in TNBC cells (the TNBC cell lines or the patients derived cells [PDCs]) and induced the resistance of cells to antitumor agents. Therefore, the results indicated that the miR-30c/PXR axis participates in the FBI-1-mediated drug-resistance of TNBC cells.
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Affiliation(s)
- Hua Yang
- Department of the Medical Oncology, the PLA General Hospital, Beijing, 100853, China.,Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Lili Ren
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Yanan Wang
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Xuebing Bi
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Xiaoli Li
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Ming Wen
- Department of the Gastrointestinal Surgery, the Affiliated Hospital of Hebei University, Baoding City, 071000, Hebei province, P.R. China
| | - Qian Zhang
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Yang Yang
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Youchao Jia
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Yumiao Li
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Aimin Zang
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China
| | - Yaning Wei
- Department of the Medical Oncology/the Hebei Key Laboratory of the Cancer Radiotherapy and Chemotherapy, Baoding City, 071000, Hebei province, P.R. China.
| | - Guanghai Dai
- Department of the Medical Oncology, the PLA General Hospital, Beijing, 100853, China.
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12
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Proto-oncogene Zbtb7a represses miR-125a-5p transcription in hepatocellular carcinoma cells. Mol Biol Rep 2020; 47:4875-4878. [PMID: 32410140 DOI: 10.1007/s11033-020-05512-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 05/08/2020] [Indexed: 02/07/2023]
Abstract
Zbtb7a is a transcription factor whose dysfunction is correlated to the development of several types of cancer, including hepatocellular carcinoma (HCC). It generally acts as a repressor of transcription downregulating the expression of several target genes including oncosuppressors ARF and Rb. In this study, Zbtb7a was found to suppress the expression of miR-125a, an oncosuppressive miRNA that is often downregulated in HCC. This effect is mediated by the binding of the transcription factor to a regulatory sequence in the promoter of the transcription unit of miR-125a located 14 bp upstream of the transcription start site. Consistent with this observation, the analysis of 370 HCC samples showed an upregulation of Zbtb7a compared to 50 normal liver tissues and a reverse correlation with miR-125a expression. These data suggest that miR-125a may support the oncogenic potential of Zbtb7a.
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13
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Gupta S, Singh AK, Prajapati KS, Kushwaha PP, Shuaib M, Kumar S. Emerging role of ZBTB7A as an oncogenic driver and transcriptional repressor. Cancer Lett 2020; 483:22-34. [PMID: 32348807 DOI: 10.1016/j.canlet.2020.04.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 04/09/2020] [Accepted: 04/16/2020] [Indexed: 02/08/2023]
Abstract
ZBTB7A is a member of the POK family of transcription factors that possesses a POZ-domain at the N-terminus and Krüppel-like zinc-finger at the c-terminus. ZBTB7A was initially isolated as a protein that binds to the inducer of the short transcript of HIV-1 virus TAT gene promoter. The protein forms a homodimer through protein-protein interaction via the N-terminus POZ-domains. ZBTB7A typically binds to the DNA elements through its zinc-finger domains and represses transcription both by modification of the chromatin organization and through the direct recruitment of transcription factors to gene regulatory regions. ZBTB7A is involved in several fundamental biological processes including cell proliferation, differentiation, and development. It also participates in hematopoiesis, adipogenesis, chondrogenesis, cellular metabolism and alternative splicing of BCLXL, DNA repair, development of oligodendrocytes, osteoclast and unfolded protein response. Aberrant ZBTB7A expression promotes oncogenic transformation and tumor progression, but also maintains a tumor suppressive role depending on the type and genetic context of cancer. In this comprehensive review we provide information about the structure, function, targets, and regulators of ZBTB7A and its role as an oncogenic driver and transcriptional repressor in various human diseases.
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Affiliation(s)
- Sanjay Gupta
- Department of Urology, Case Western Reserve University, Cleveland, OH 44106, USA; The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA; Department of Nutrition, Case Western Reserve University, Cleveland, OH 44106, USA; Divison of General Medical Sciences, Case Comprehensive Cancer Center, Cleveland, OH 44106, USA; Department of Urology, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, USA.
| | - Atul Kumar Singh
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India
| | - Kumari Sunita Prajapati
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India
| | - Prem Prakash Kushwaha
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India
| | - Mohd Shuaib
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India
| | - Shashank Kumar
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India.
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14
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Schlag K, Steinhilber D, Karas M, Sorg BL. Analysis of proximal ALOX5 promoter binding proteins by quantitative proteomics. FEBS J 2020; 287:4481-4499. [PMID: 32096311 DOI: 10.1111/febs.15259] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 10/15/2019] [Accepted: 02/23/2020] [Indexed: 01/01/2023]
Abstract
5-Lipoxygenase (5-LO) is the initial enzyme in the biosynthesis of leukotrienes, which are mediators involved in pathophysiological conditions such as asthma and certain cancer types. Knowledge of proteins involved in 5-LO pathway regulation, including gene regulatory proteins, is needed to evaluate all options for therapeutic intervention in these diseases. Here, we present a mass spectrometric screening of ALOX5 promoter-interacting proteins, obtained by DNA pulldown and label-free quantitative mass spectrometry. Protein preparations from myeloid and B-lymphocytic cell lines were screened for promoter DNA interactors. Through statistical analysis, 66 proteins were identified as specific ALOX5 promotor binding proteins. Among those, the 15 most likely candidates for a prominent role in ALOX5 gene regulation are the known ALOX5 interactors Sp1 and Sp3, the related factor Sp2, two Krüppel-like factors (KLF13 and KLF16) and six other zinc finger proteins (MAZ, PRDM10, VEZF1, ZBTB7A, ZNF281 and ZNF579). Intriguingly, we also identified two helicases (BLM and DHX36) and the proteins hnRNPD and hnRNPK, which are, together with the protein MAZ, known to interact with DNA G-quadruplex structures. As G-quadruplexes are implicated in gene regulation, spectroscopic and antibody-based methods were used to confirm their presence within the GC-rich sequence of the ALOX5 promoter. In summary, we have systematically characterized the interactome of the ALOX5 promoter, identifying several zinc finger proteins as novel potential ALOX5 gene regulators. Further, we have shown that the ALOX5 promoter can form DNA G-quadruplex structures, which may play a functional role in ALOX5 gene regulation.
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Affiliation(s)
- Katharina Schlag
- Institute of Pharmaceutical Chemistry/ZAFES, Goethe-University, Frankfurt am Main, Germany
| | - Dieter Steinhilber
- Institute of Pharmaceutical Chemistry/ZAFES, Goethe-University, Frankfurt am Main, Germany
| | - Michael Karas
- Institute of Pharmaceutical Chemistry/ZAFES, Goethe-University, Frankfurt am Main, Germany
| | - Bernd L Sorg
- Institute of Pharmaceutical Chemistry/ZAFES, Goethe-University, Frankfurt am Main, Germany
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15
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Yue R, Chen Y, Lai W, Wei W. miR-106b exerts tumor suppressive functions in ovarian carcinoma by directly targeting ZBTB7A. Minerva Med 2020; 112:657-658. [PMID: 32166935 DOI: 10.23736/s0026-4806.20.06475-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ruiqin Yue
- Department of Gynaecology, The Second People's Hospital of Liaocheng, The Second Hospital of Liao Cheng Affiliated to Shandong First Medical University, Liaocheng, China
| | | | - Wei Lai
- Department of Gynecology and Pediatrics
| | - Wei Wei
- st Hospital of the People's Liberation Army of China, Xinjiang, China -
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16
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Mao A, Chen M, Qin Q, Liang Z, Jiang W, Yang W, Wei C. ZBTB7A promotes migration, invasion and metastasis of human breast cancer cells through NF-κB-induced epithelial-mesenchymal transition in vitro and in vivo. J Biochem 2019; 166:485-493. [PMID: 31385585 DOI: 10.1093/jb/mvz062] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Accepted: 08/02/2019] [Indexed: 12/13/2022] Open
Abstract
It has been generally confirmed that zinc finger and BTB domain containing 7A (ZBTB7A) plays an important role in the occurrence and progression of malignant tumours, but the promotion or inhibition effect is related to tumour type. The mechanism between ZBTB7A and breast cancer is not well understood, so further research is needed. In this study, we first investigated the expression of ZBTB7A in tissue samples of clinical breast cancer patients, MDA-MB-231, MCF-7 and MCF-10A cells. Second, we overexpressed the ZBTB7A in MCF-7 cells and silenced the ZBTB7A in MDA-MB-231 cells using lentivirus transfection technology, respectively, and verified the effect of ZBTB7A on migration and invasion of breast cancer cell lines through in vitro cell function experiments, such as wound-healing assay, migration and invasion assay, quantitative real time reverse transcriptase (qRT-PCR) and western blot. Then, the correlation between the above influences, epithelial-mesenchymal transition (EMT) and NF-κB was analysed. Finally, in vivo tumour transplantation model in nude mice was established to verified the effect of ZBTB7A on metastasis of breast cancer MDA-MB-231 cells. In conclusion, ZBTB7A is highly expressed in cancer tissue, breast cancer cell line MDA-MB-231 and MCF-7. Meanwhile, the high expression of ZBTB7A may promote cell migration, invasion and tumour metastasis, which may be related to EMT events by regulating NF-κB.
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Affiliation(s)
- Anyun Mao
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Maojian Chen
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Qinghong Qin
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Zhijie Liang
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Wei Jiang
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Weiping Yang
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Changyuan Wei
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
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17
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Constantinou C, Spella M, Chondrou V, Patrinos GP, Papachatzopoulou A, Sgourou A. The multi-faceted functioning portrait of LRF/ZBTB7A. Hum Genomics 2019; 13:66. [PMID: 31823818 PMCID: PMC6905007 DOI: 10.1186/s40246-019-0252-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 11/26/2019] [Indexed: 12/19/2022] Open
Abstract
Transcription factors (TFs) consisting of zinc fingers combined with BTB (for broad-complex, tram-track, and bric-a-brac) domain (ZBTB) are a highly conserved protein family that comprises a multifunctional and heterogeneous group of TFs, mainly modulating cell developmental events and cell fate. LRF/ZBTB7A, in particular, is reported to be implicated in a wide variety of physiological and cancer-related cell events. These physiological processes include regulation of erythrocyte maturation, B/T cell differentiation, adipogenesis, and thymic insulin expression affecting consequently insulin self-tolerance. In cancer, LRF/ZBTB7A has been reported to act either as oncogenic or as oncosuppressive factor by affecting specific cell processes (proliferation, apoptosis, invasion, migration, metastasis, etc) in opposed ways, depending on cancer type and molecular interactions. The molecular mechanisms via which LRF/ZBTB7A is known to exert either physiological or cancer-related cellular effects include chromatin organization and remodeling, regulation of the Notch signaling axis, cellular response to DNA damage stimulus, epigenetic-dependent regulation of transcription, regulation of the expression and activity of NF-κB and p53, and regulation of aerobic glycolysis and oxidative phosphorylation (Warburg effect). It is a pleiotropic TF, and thus, alterations to its expression status become detrimental for cell survival. This review summarizes its implication in different cellular activities and the commonly invoked molecular mechanisms triggered by LRF/ZBTB7A’s orchestrated action.
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Affiliation(s)
- Caterina Constantinou
- Biology laboratory, School of Science and Technology, Hellenic Open University, Patras, Greece.,Laboratory of Pharmacology, Department of Medicine, University of Patras, Patras, Greece
| | - Magda Spella
- Biology laboratory, School of Science and Technology, Hellenic Open University, Patras, Greece.,Laboratory for Molecular Respiratory Carcinogenesis, Department of Physiology, Medical Faculty, University of Patras, Patras, Greece
| | - Vasiliki Chondrou
- Biology laboratory, School of Science and Technology, Hellenic Open University, Patras, Greece
| | - George P Patrinos
- Laboratory of Pharmacogenomics and Individualized Therapy, Department of Pharmacy, School of Health Sciences, University of Patras, Patras, Greece.,Department of Pathology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, UAE.,Zayed Center of Health Sciences, United Arab Emirates University, Al-Ain, UAE
| | | | - Argyro Sgourou
- Biology laboratory, School of Science and Technology, Hellenic Open University, Patras, Greece.
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18
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Choi SH, Kim MY, Yoon YS, Koh DI, Kim MK, Cho SY, Kim KS, Hur MW. Hypoxia-induced RelA/p65 derepresses SLC16A3 (MCT4) by downregulating ZBTB7A. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2019; 1862:771-785. [PMID: 31271899 DOI: 10.1016/j.bbagrm.2019.06.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 06/12/2019] [Accepted: 06/18/2019] [Indexed: 12/25/2022]
Abstract
Overexpressed Solute Carrier Family 16 Member 3 (SLC16A3, also called MCT4) plays a critical role in hypoxic cancer cell growth and proliferation, by expelling glycolysis-derived lactate across the plasma membrane. However, how SLC16A3 expression is regulated, under hypoxic conditions, is poorly understood. FBI-1, encoded by ZBTB7A, is a proto-oncoprotein. Interestingly, under hypoxic conditions, expression of SLC16A3, and hypoxia-inducible factor-1 (HIF-1), increased gradually, while FBI-1 expression decreased, suggesting a negative correlation between SLC16A3/HIF-1 and FBI-1 expression. Consequently, we hypothesized that FBI-1 might regulate SLC16A3 and/or HIF-1 expression. Transient transfection and transcription assays of SLC16A3 promoter reporter fusion constructs, oligonucleotide-pulldowns, and ChIP assays, showed that HIF-1α activates SLC16A3 by binding to a hypoxia-response element (HRE), while ectopic FBI-1 potently repressed SLC16A3, by binding to both FBI-1-response elements (FREs) and HREs, during hypoxia. Further evidence for this model was downregulation of ZBTB7A, correlated with SLC16A3 upregulation, in hypoxic colon cancer cells. We also investigated how FBI-1 expression is downregulated during hypoxia. The 5'-upstream regulatory region of ZBTB7A contains two NF-κB-binding sites and two HREs. Interestingly, hypoxia activated NF-κB (RelA/p65) and also increased its nuclear translocation. NF-κB repressed ZBTB7A by binding NF-κB-binding elements, and downregulated the repressor FBI-1, thereby increasing SLC16A3 transcription. While transcriptional repression of SLC16A3 by FBI-1 inhibited lactate efflux, repression of ZBTB7A and activation of lactate efflux by NF-κB, increased colon cancer cell growth and proliferation.
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Affiliation(s)
- Seo-Hyun Choi
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMoon-Ku, Seoul 03722, Republic of Korea
| | - Min-Young Kim
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMoon-Ku, Seoul 03722, Republic of Korea
| | - Young-So Yoon
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMoon-Ku, Seoul 03722, Republic of Korea
| | - Dong-In Koh
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMoon-Ku, Seoul 03722, Republic of Korea
| | - Min-Kyeong Kim
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMoon-Ku, Seoul 03722, Republic of Korea
| | - Su-Yeon Cho
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMoon-Ku, Seoul 03722, Republic of Korea
| | - Kyung-Sup Kim
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMoon-Ku, Seoul 03722, Republic of Korea
| | - Man-Wook Hur
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMoon-Ku, Seoul 03722, Republic of Korea.
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Chen L, Zhong J, Liu JH, Liao DF, Shen YY, Zhong XL, Xiao X, Ding WJ, Peng XD, Xiong W, Zu XY. Pokemon Inhibits Transforming Growth Factor β-Smad4-Related Cell Proliferation Arrest in Breast Cancer through Specificity Protein 1. J Breast Cancer 2019; 22:15-28. [PMID: 30941230 PMCID: PMC6438826 DOI: 10.4048/jbc.2019.22.e11] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 11/17/2018] [Indexed: 02/08/2023] Open
Abstract
Purpose Pokemon, also known as ZBTB7A, belongs to the POZ and Krüppel (POK) family of transcription repressors and is implicated in tumor progression as a key proto-oncogene. This present study aimed at determining the mechanism by which Pokemon inhibits transforming growth factor β (TGFβ)-Smad4 pathway-dependent proliferation arrest of breast cancer cells via specificity protein 1 (SP1). Methods Over-expressing plasmid or small interfering RNA (siRNA) transfection was used to regulate Pokemon levels. The EdU incorporation assay, MTS assay, and clone formation were used to identify the inhibitory effect of Pokemon siRNA on cell proliferation. Quantitative real-time polymerase chain reaction assay confirmed that Pokemon deletion inhibited the expression of proliferation-associated genes. The dual-luciferase reporter assay, electrophoretic mobility shift assay, and co-immunoprecipitation assay were used to analyze binding between Pokemon, Smad4, and SP1. Results Pokemon deletion induced proliferation arrest of breast cancer cells and inhibited the expression of proliferation-associated genes, especially Smad4. Pokemon bound with SP1 to interdict Smad4 promoter activity. Information on clinical samples was obtained from The Cancer Genome Atlas data, in which the Pokemon mRNA levels showed a negative correlation with Smad4 levels in different subtypes of breast cancer in two independent datasets. Conclusion We demonstrated that Pokemon binds to SP1 to down-regulate Smad4 expression, thereby promoting proliferation of breast cancer cells. This suggests that Pokemon is a potential TGFβ-signaling participant in breast cancer progression.
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Affiliation(s)
- Ling Chen
- Institute of Clinical Medicine, the First Affiliated Hospital of University of South China, Hengyang, China
| | - Jing Zhong
- Institute of Clinical Medicine, the First Affiliated Hospital of University of South China, Hengyang, China
| | - Jiang-Hua Liu
- Institute of Clinical Medicine, the First Affiliated Hospital of University of South China, Hengyang, China
| | - Duan-Fang Liao
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, China
| | - Ying-Ying Shen
- Institute of Clinical Medicine, the First Affiliated Hospital of University of South China, Hengyang, China
| | - Xiao-Lin Zhong
- Institute of Clinical Medicine, the First Affiliated Hospital of University of South China, Hengyang, China
| | - Xiao Xiao
- Institute of Clinical Medicine, the First Affiliated Hospital of University of South China, Hengyang, China
| | - Wen-Jun Ding
- Institute of Clinical Medicine, the First Affiliated Hospital of University of South China, Hengyang, China
| | - Xiu-Da Peng
- Institute of Clinical Medicine, the First Affiliated Hospital of University of South China, Hengyang, China
| | - Wei Xiong
- Key Laboratory of Carcinogenesis of Ministry of Health and Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
| | - Xu-Yu Zu
- Institute of Clinical Medicine, the First Affiliated Hospital of University of South China, Hengyang, China
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20
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Liang X, Zhao Q, Geng T, Luo S, He Q. MiR-106b regulates the apoptosis and tumorigenesis of hepatocellular carcinoma via targeting Zinc finger and BTB domain-containing protein 7A (Zbtb7a). J Biochem Mol Toxicol 2018; 32:e22169. [PMID: 29975452 DOI: 10.1002/jbt.22169] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 05/16/2018] [Accepted: 06/15/2018] [Indexed: 12/31/2022]
Abstract
MicroRNAs play vital regulatory roles in various type of tumorigenesis. We aimed to explore the functional microRNAs that might play as therapeutic targets in hepatocellular carcinoma (HCC). In this study, our results revealed that microRNA-106b was significantly increased in HCC tumor tissues. However, miR-106b knockdown remarkably suppressed the growth and increased the apoptosis of Hub-7 HCC cells. Biological analysis indicated that miR-106b directly targeted toZinc finger and BTB domain-containing protein 7A (Zbtb7a) to regulate the apoptosis of Hub-7 cells. Extensively, Zbtb7a overexpression reversed Huh-7 cell apoptosis and growth in vitro. Furthermore, in vivo studies confirmed that miR-106b inhibition or Zbtb7a overexpression retarded the growth of Hub-7 xenograft tumor in nude mice. In conclusion, we provide the evidence for the regulatory role of miR-106b in HCC, which is causally linked to targeting of Zbtb7a. This study may provide miR-106b as a potential therapeutic strategy for HCC.
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Affiliation(s)
- Xiao Liang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Qinghua Zhao
- Nursing Department, the First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Tingting Geng
- Nursing Department, the First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Shengshu Luo
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Qin He
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
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21
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Liu F, Lan J, Jiao W, Mo X, Huang Y, Ye H, Xiao R, Wang Y, Mo M, Shi L. Differences in Zbtb7a expression cause heterogeneous changes in human nasopharyngeal carcinoma CNE3 sublines. Oncol Lett 2017; 14:2669-2676. [PMID: 28927029 PMCID: PMC5588127 DOI: 10.3892/ol.2017.6553] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 04/06/2017] [Indexed: 12/31/2022] Open
Abstract
The present study aimed to determine the association between changes in Zbtb7a expression levels and heterogeneity of nasopharyngeal carcinoma (NPC) CNE3 sublines. CNE3 sublines were established by screening of serial dilution and continuous passage. Proliferative ability and tumorigenicity of the sublines were analyzed separately by soft-agar colony formation and mouse studies. The NPC tissues from mice were analyzed by histological evaluation and immunohistochemistry. The expression levels of Zbtb7a mRNA and protein were analyzed separately by quantitative reverse transcription polymerase chain reaction and western blotting. According to findings from the soft-agar colony formation and mouse studies, two sublines with increased tumorigenicity compared with other sublines were transfected transiently with Zbtb7a short hairpin RNA (shRNA) recombinant plasmid. The changes in viability, migration and invasion abilities were evaluated separately by MTT, colorimetric focus-formation, Transwell migration and invasion assays. The sublines CNE3-GX6 and CNE3-GX11 were selected for subsequent study due to increased tumorigenicity and increased Zbtb7a expression levels compared with the other sublines. High metastatic potency was not observed in all of the sublines. Zbtb7a expression levels were positively associated with tumorigenic degree of the sublines. The growth, migration and invasion abilities of the sublines transfected with Zbtb7a shRNA plasmid were decreased compared with the cells transfected with empty vector in the negative control group. The findings suggest Zbtb7a expression levels may be associated with heterogeneity of CNE3 sublines. Therefore, Zbtb7a may have an important role in the regulatory mechanism of NPC heterogeneity.
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Affiliation(s)
- Fei Liu
- Research Center of Medical Sciences, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, P.R. China
| | - Jiao Lan
- Research Center of Medical Sciences, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, P.R. China
| | - Wei Jiao
- Research Center of Medical Sciences, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, P.R. China
| | - Xianglan Mo
- Department of Pathology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, P.R. China
| | - Yongta Huang
- Department of Pathology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, P.R. China
| | - Huilan Ye
- Department of Gastroenterology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, P.R. China
| | - Ruiping Xiao
- Research Center of Medical Sciences, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, P.R. China
| | - Yongli Wang
- Department of Otolaryngology-Head and Neck Oncology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, P.R. China
| | - Mingzheng Mo
- Research Center of Medical Sciences, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, P.R. China
| | - Liwei Shi
- Vaccine Clinical Research Institute, Guangxi Center for Disease Prevention and Control, Nanning, Guangxi 530028, P.R. China
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22
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Davidson NL, Yu F, Kijpaisalratana N, Le TQ, Beer LA, Radomski KL, Armstrong RC. Leukemia/lymphoma-related factor (LRF) exhibits stage- and context-dependent transcriptional controls in the oligodendrocyte lineage and modulates remyelination. J Neurosci Res 2017; 95:2391-2408. [PMID: 28556945 PMCID: PMC5655903 DOI: 10.1002/jnr.24083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 04/24/2017] [Accepted: 04/25/2017] [Indexed: 02/03/2023]
Abstract
Leukemia/lymphoma‐related factor (LRF), a zinc‐finger transcription factor encoded by Zbtb7a, is a protooncogene that regulates differentiation in diverse cell lineages, and in the CNS, its function is relatively unexplored. This study is the first to examine the role of LRF in CNS pathology. We first examined LRF expression in a murine viral model of spinal cord demyelination with clinically relevant lesion characteristics. LRF was rarely expressed in oligodendrocyte progenitors (OP) yet, was detected in nuclei of the majority of oligodendrocytes in healthy adult CNS and during remyelination. Plp/CreERT:Zbtb7afl/fl mice were then used with cuprizone demyelination to determine the effect of LRF knockdown on oligodendrocyte repopulation and remyelination. Cuprizone was given for 6 weeks to demyelinate the corpus callosum. Tamoxifen was administered at 4, 5, or 6 weeks after the start of cuprizone. Tamoxifen‐induced knockdown of LRF impaired remyelination during 3 or 6‐week recovery periods after cuprizone. LRF knockdown earlier within the oligodendrocyte lineage using NG2CreERT:Zbtb7afl/fl mice reduced myelination after 6 weeks of cuprizone. LRF knockdown from either the Plp/CreERT line or the NG2CreERT line did not significantly change OP or oligodendrocyte populations. In vitro promoter assays demonstrated the potential for LRF to regulate transcription of myelin‐related genes and the notch target Hes5, which has been implicated in control of myelin formation and repair. In summary, in the oligodendrocyte lineage, LRF is expressed mainly in oligodendrocytes but is not required for oligodendrocyte repopulation of demyelinated lesions. Furthermore, LRF can modulate the extent of remyelination, potentially by contributing to interactions regulating transcription.
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Affiliation(s)
| | - Fengshan Yu
- Department of Anatomy, Physiology, and Genetics, Uniformed Services, University of the Health Sciences, Bethesda, Maryland, USA
| | | | - Tuan Q Le
- Department of Anatomy, Physiology, and Genetics, Uniformed Services, University of the Health Sciences, Bethesda, Maryland, USA
| | - Laurel A Beer
- Department of Anatomy, Physiology, and Genetics, Uniformed Services, University of the Health Sciences, Bethesda, Maryland, USA
| | - Kryslaine L Radomski
- Department of Anatomy, Physiology, and Genetics, Uniformed Services, University of the Health Sciences, Bethesda, Maryland, USA
| | - Regina C Armstrong
- Program in Neuroscience, Bethesda, Maryland, USA.,Department of Anatomy, Physiology, and Genetics, Uniformed Services, University of the Health Sciences, Bethesda, Maryland, USA
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23
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A tumor suppressor role for C/EBPα in solid tumors: more than fat and blood. Oncogene 2017; 36:5221-5230. [PMID: 28504718 DOI: 10.1038/onc.2017.151] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/29/2017] [Accepted: 04/10/2017] [Indexed: 12/12/2022]
Abstract
The transcription factor CCAAT/enhancer-binding protein alpha (C/EBPα) plays a critical role during embryogenesis and is thereafter required for homeostatic glucose metabolism, adipogenesis and myeloid development. Its ability to regulate the expression of lineage-specific genes and induce growth arrest contributes to the terminal differentiation of several cell types, including hepatocytes, adipocytes and granulocytes. CEBPA loss of-function mutations contribute to the development of ~10% of acute myeloid leukemia (AML), stablishing a tumor suppressor role for C/EBPα. Deregulation of C/EBPα expression has also been reported in a variety of additional human neoplasias, including liver, breast and lung cancer. However, functional CEBPA mutations have not been found in solid tumors, suggesting that abrogation of C/EBPα function in non-hematopoietic tissues is regulated by alternative mechanisms. Here we review the function of C/EBPα in solid tumors and focus on the molecular mechanisms underlying its tumor suppressive role.
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24
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Yang Y, Li Y, Di F, Cui J, Wang Y, David Xu ZQ. Pokemon decreases the transcriptional activity of RARα in the absence of ligand. Biol Chem 2017; 398:331-340. [DOI: 10.1515/hsz-2016-0142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 09/14/2016] [Indexed: 01/05/2023]
Abstract
Abstract
Pokemon is a transcriptional repressor that belongs to the POZ and Krüppel (POK) protein family. In this study, we investigated the potential interaction between Pokemon and retinoic acid receptor alpha (RARα) and determined the role of Pokemon in regulation of RARα transcriptional activity in the absence of ligand. We found that Pokemon could directly interact with RARα. Moreover, we demonstrated that Pokemon could decrease the transcriptional activity of RARα in the absence of ligand. Furthermore, we showed that Pokemon could repress the transcriptional activity of RARα by increasing the recruitment of nuclear receptor co-repressor (NCoR) and silencing mediator of retinoic acid and thyroid hormone receptor (SMRT) to the retinoic acid response element (RARE) element. Taken together, these data suggest that Pokemon is a novel partner of RARα that acts as a co-repressor to regulate RARα transcriptional activity in the absence of ligand.
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25
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Pro-apoptotic effects of rHSG on C6 glioma cells. Int J Mol Med 2016; 38:1190-8. [PMID: 27599901 PMCID: PMC5029950 DOI: 10.3892/ijmm.2016.2725] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 08/17/2016] [Indexed: 12/02/2022] Open
Abstract
Our previous in vitro study demonstrated that the rat hyperplasia suppressor gene (rHSG) inhibited the proliferation of C6 cells. In the present study, we investigated further the effects of rHSG overexpression on the apoptosis of C6 cells and the possible pathways involved. Hoechst 33342/PI double staining and comet assay were used to examine the morphological characteristics of apoptosis and to examine the effects of rHSG on the apoptosis of the C6 cells. Western blot analysis was used to determine the effects of rHSG overexpression on the protein expression levels of poly(ADP-ribose) polymerase (PARP), cleaved caspase-3, phosphorylated extracellular signal-regulated kinase 1/2 (p-Erk1/2), phosphorylated Akt (p-Akt) and phosphoinositide 3-kinase (PI3K)/Akt, as well as on the mitogen-activated protein kinase (MAPK) pathways induced by insulin-like growth factor (IGF)-1. Our results revealed that the C6 cells transfected with the rHSG adenoviral vector (Adv-rHSG-GFP group) efficiently expressed rHSG protein; Hoechst 33342/PI double staining and comet assay revealed that rHSG increased C6 cell apoptosis and induced DNA damage. Western blot analysis indicated that rHSG overexpression significantly increased the level of full-length PARP at 24 and 72 h (P<0.01), but decreased the level at 48 h following transfection (P<0.01), while the proteins levels of cleaved PARP and cleaved caspase-3 increased significantly (P<0.01). The protein expression of p-Erk1/2 and p-Akt began to decrease at 48 h post-transfection (P<0.01). In addition, the protein levels of Akt and Erk1/2 induced by IGF-1 were significantly inhibited. On the whole, the findings of the present study demonstrate that rHSG overexpression induces the apoptosis of rat glioma cells, and that these effects may involve the PI3K/Akt and MAPK pathways.
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26
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Zhu M, Li M, Wang T, Linghu E, Wu B. MicroRNA-137 represses FBI-1 to inhibit proliferation and in vitro invasion and migration of hepatocellular carcinoma cells. Tumour Biol 2016; 37:13995-14008. [PMID: 27492460 DOI: 10.1007/s13277-016-5230-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 07/15/2016] [Indexed: 02/05/2023] Open
Abstract
The pro-oncogene factor that binds to inducer of short transcripts-1 (FBI-1), which is encoded by ZBTB7A gene and belongs to POK (POZ/BTB and KrÜppel) protein family, has been shown to enhance hepatocellular carcinoma (HCC) cells proliferation and multi-drug resistance (MDR) process. However, the possibility that FBI-1 is a therapeutic target for further HCC treatment remains poorly determined. In the current study, two microRNA (miRNA) target prediction programs (TargetScan and MiRanda) were used to identify miR-137 as a potential regulator of FBI-1. Our results showed that expression of miR-137 was downregulated, while FBI-1 was upregulated in clinical HCC specimens, compared with paired non-tumor specimens. Overexpression of miR-137 via adenoviral vector inhibited the proliferation and anchorage-independent growth of HCC cells, HepG2 and MHCC-97H. Our data also showed that miR-137 repressed endogenous expression level of FBI-1, as well as Notch-1 and Survivin. MiR-137 also inhibited in vitro invasion and migration of HCC cells and attenuated their epithelial-mesenchymal transition (EMT) process. Moreover, miR-137 suppressed the growth rate of HepG2 cells in nude mice model. Overexpression of miR-137 via its adenoviral vector enhanced the sensitivity of HepG2 cells to anti-tumor drugs and attenuated the MDR process of a resistance cell line HepG2/adriamycin (ADR). Thus, FBI-1 downregulation mediated by miR-137 overexpression may be a potential strategy for HCC treatment.
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MESH Headings
- Animals
- Apoptosis
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Blotting, Western
- Carcinoma, Hepatocellular/genetics
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Cell Movement
- Cell Proliferation
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/metabolism
- Epithelial-Mesenchymal Transition
- Female
- Follow-Up Studies
- Gene Expression Regulation, Neoplastic
- Humans
- Immunoenzyme Techniques
- Liver Neoplasms/genetics
- Liver Neoplasms/metabolism
- Liver Neoplasms/pathology
- Male
- Mice
- Mice, Nude
- MicroRNAs/genetics
- Middle Aged
- Neoplasm Invasiveness
- Neoplasm Staging
- Prognosis
- RNA, Messenger/genetics
- Real-Time Polymerase Chain Reaction
- Reverse Transcriptase Polymerase Chain Reaction
- Transcription Factors/genetics
- Transcription Factors/metabolism
- Tumor Cells, Cultured
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Min Zhu
- Department of Oncology, Nan Lou Division, Chinese PLA General Hospital, Beijing, 100853, China
| | - Mingyang Li
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, 100853, China
| | - Tao Wang
- Institute of Toxicology and Pharmacology, Chinese Military Medical Science Academy, Beijing, 100850, China
| | - Enqiang Linghu
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, 100853, China
| | - Benyan Wu
- Department of Gastroenterology, Nan Lou Division, Chinese PLA General Hospital, Beijing, 100853, China.
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27
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Abstract
Human retinoblastoma gene RB1 is the first tumor suppressor gene (TSG) isolated by positional cloning in 1986. RB is extensively studied for its ability to regulate cell cycle by binding to E2F1 and inhibiting the transcriptional activity of the latter. In human embryonic stem cells (ESCs), only a minute trace of RB is found in complex with E2F1. Increased activity of RB triggers differentiation, cell cycle arrest, and cell death. On the other hand, inactivation of the entire RB family (RB1, RBL1, and RBL2) in human ESC induces G2/M arrest and cell death. These observations indicate that both loss and overactivity of RB could be lethal for the stemness of cells. A question arises why inactive RB is required for the survival and stemness of cells? To shed some light on this question, we analyzed the RB-binding proteins. In this review we have focused on 27 RB-binding partners that may have potential roles in different aspects of stem cell biology.
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Affiliation(s)
- M Mushtaq
- Karolinska Institutet, Stockholm, Sweden
| | | | - E V Kashuba
- Karolinska Institutet, Stockholm, Sweden; R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology, NASU, Kyiv, Ukraine.
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28
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ZBTB7A mutations in acute myeloid leukaemia with t(8;21) translocation. Nat Commun 2016; 7:11733. [PMID: 27252013 PMCID: PMC4895769 DOI: 10.1038/ncomms11733] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 04/26/2016] [Indexed: 02/05/2023] Open
Abstract
The t(8;21) translocation is one of the most frequent cytogenetic abnormalities in acute myeloid leukaemia (AML) and results in the RUNX1/RUNX1T1 rearrangement. Despite the causative role of the RUNX1/RUNX1T1 fusion gene in leukaemia initiation, additional genetic lesions are required for disease development. Here we identify recurring ZBTB7A mutations in 23% (13/56) of AML t(8;21) patients, including missense and truncating mutations resulting in alteration or loss of the C-terminal zinc-finger domain of ZBTB7A. The transcription factor ZBTB7A is important for haematopoietic lineage fate decisions and for regulation of glycolysis. On a functional level, we show that ZBTB7A mutations disrupt the transcriptional repressor potential and the anti-proliferative effect of ZBTB7A. The specific association of ZBTB7A mutations with t(8;21) rearranged AML points towards leukaemogenic cooperativity between mutant ZBTB7A and the RUNX1/RUNX1T1 fusion. The t(8;21) translocation is often found in acute myeloid leukaemia but is not sufficient for development of the disease. In this study, the authors identify frequent mutations in the transcriptional repressor, ZBTB7A, in these patients and show that the mutations reduce DNA binding activity.
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29
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Maeda T. Regulation of hematopoietic development by ZBTB transcription factors. Int J Hematol 2016; 104:310-23. [PMID: 27250345 DOI: 10.1007/s12185-016-2035-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 05/26/2016] [Accepted: 05/26/2016] [Indexed: 12/19/2022]
Abstract
Hematopoietic development is governed by the coordinated expression of lineage- and differentiation stage-specific genes. Transcription factors play major roles in this process and their perturbation may underlie hematologic and immunologic disorders. Nearly 1900 transcription factors are encoded in the human genome: of these, 49 BTB (for broad-complex, tram-track and bric à brac)-zinc finger transcription factors referred to as ZBTB or POK proteins have been identified. ZBTB proteins, including BCL6, PLZF, ThPOK and LRF, exhibit a broad spectrum of functions in normal and malignant hematopoiesis. This review summarizes developmental and molecular functions of ZBTB proteins relevant to hematology.
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Affiliation(s)
- Takahiro Maeda
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, One Blackfan Circle, Boston, MA, 02115, USA.
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30
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Yuan ZY, Lu X, Lei F, Chai YS, Wang YG, Jiang JF, Feng TS, Wang XP, Yu X, Yan XJ, Xing DM, Du LJ. TATA boxes in gene transcription and poly (A) tails in mRNA stability: New perspective on the effects of berberine. Sci Rep 2015; 5:18326. [PMID: 26671652 PMCID: PMC4680869 DOI: 10.1038/srep18326] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 11/16/2015] [Indexed: 01/17/2023] Open
Abstract
Berberine (BBR) is a natural compound with variable pharmacological effects and a broad panel of target genes. We investigated berberine’s pharmacological activities from the perspective of its nucleotide-binding ability and discovered that BBR directly regulates gene expression by targeting TATA boxes in transcriptional regulatory regions as well as the poly adenine (poly (A)) tail at the mRNA terminus. BBR inhibits gene transcription by binding the TATA boxes in the transcriptional regulatory region, but it promotes higher levels of expression by targeting the poly (A) tails of mRNAs. The present study demonstrates that TATA boxes and poly (A) tails are the first and second primary targets by which BBR regulates gene expression. The final outcome of gene regulation by BBR depends on the structure of the individual gene. This is the first study to reveal that TATA boxes and poly (A) tails are direct targets for BBR in its regulation of gene expression. Our findings provide a novel explanation for the complex activities of a small molecule compound in a biological system and a novel horizon for small molecule-compound pharmacological studies.
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Affiliation(s)
- Zhi-Yi Yuan
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Xi Lu
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Fan Lei
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Yu-Shuang Chai
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Yu-Gang Wang
- MD Anderson Cancer Center, University of Texas, Houston, Texas 77030, USA
| | - Jing-Fei Jiang
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Tian-Shi Feng
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Xin-Pei Wang
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Xuan Yu
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Xiao-Jin Yan
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Dong-Ming Xing
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Li-Jun Du
- MOE Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China
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31
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Kim MY, Kim HY, Hong J, Kim D, Lee H, Cheong E, Lee Y, Roth J, Kim DG, Min DS, Choi KY. CXXC5 plays a role as a transcription activator for myelin genes on oligodendrocyte differentiation. Glia 2015; 64:350-62. [DOI: 10.1002/glia.22932] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 09/07/2015] [Accepted: 09/24/2015] [Indexed: 12/19/2022]
Affiliation(s)
- Mi-Yeon Kim
- Translational Research Center for Protein Function Control; Yonsei University; Seoul 120-749 Korea
- Department of Biotechnology; College of Life Science and Biotechnology, Yonsei University; Seoul 120-749 Korea
| | - Hyun-Yi Kim
- Translational Research Center for Protein Function Control; Yonsei University; Seoul 120-749 Korea
- Department of Biotechnology; College of Life Science and Biotechnology, Yonsei University; Seoul 120-749 Korea
| | - Jiso Hong
- Biological Sciences; Korea Advanced Institute of Science and Technology (KAIST); Daejeon 305-701 Korea
| | - Daesoo Kim
- Biological Sciences; Korea Advanced Institute of Science and Technology (KAIST); Daejeon 305-701 Korea
| | - Hyojung Lee
- Translational Research Center for Protein Function Control; Yonsei University; Seoul 120-749 Korea
- Department of Biotechnology; College of Life Science and Biotechnology, Yonsei University; Seoul 120-749 Korea
| | - Eunji Cheong
- Translational Research Center for Protein Function Control; Yonsei University; Seoul 120-749 Korea
- Department of Biotechnology; College of Life Science and Biotechnology, Yonsei University; Seoul 120-749 Korea
| | - Yangsin Lee
- Department of Integrated OMICS For Biomedical Science; WCU Program of Graduate School, Yonsei University; Seoul 120-749 Korea
| | - Jürgen Roth
- Department of Integrated OMICS For Biomedical Science; WCU Program of Graduate School, Yonsei University; Seoul 120-749 Korea
| | - Dong Goo Kim
- Department of Pharmacology; Brain Research Institute, Brain Korea 21 Project for Medical Science, Severance Biomedical Science Institute, Yonsei University, College of Medicine; Seoul 120-749 Korea
| | - Do Sik Min
- Translational Research Center for Protein Function Control; Yonsei University; Seoul 120-749 Korea
- Department of Molecular Biology; College of Natural Science, Pusan National University; Busan 609-735 Korea
| | - Kang-Yell Choi
- Translational Research Center for Protein Function Control; Yonsei University; Seoul 120-749 Korea
- Department of Biotechnology; College of Life Science and Biotechnology, Yonsei University; Seoul 120-749 Korea
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Turkel N, Portela M, Poon C, Li J, Brumby AM, Richardson HE. Cooperation of the BTB-Zinc finger protein, Abrupt, with cytoskeletal regulators in Drosophila epithelial tumorigenesis. Biol Open 2015; 4:1024-39. [PMID: 26187947 PMCID: PMC4542289 DOI: 10.1242/bio.012815] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The deregulation of cell polarity or cytoskeletal regulators is a common occurrence in human epithelial cancers. Moreover, there is accumulating evidence in human epithelial cancer that BTB-ZF genes, such as Bcl6 and ZBTB7A, are oncogenic. From our previous studies in the vinegar fly, Drosophila melanogaster, we have identified a cooperative interaction between a mutation in the apico-basal cell polarity regulator Scribble (Scrib) and overexpression of the BTB-ZF protein Abrupt (Ab). Herein, we show that co-expression of ab with actin cytoskeletal regulators, RhoGEF2 or Src64B, in the developing eye-antennal epithelial tissue results in the formation of overgrown amorphous tumours, whereas ab and DRac1 co-expression leads to non-cell autonomous overgrowth. Together with ab, these genes affect the expression of differentiation genes, resulting in tumours locked in a progenitor cell fate. Finally, we show that the expression of two mammalian genes related to ab, Bcl6 and ZBTB7A, which are oncogenes in mammalian epithelial cancers, significantly correlate with the upregulation of cytoskeletal genes or downregulation of apico-basal cell polarity neoplastic tumour suppressor genes in colorectal, lung and other human epithelial cancers. Altogether, this analysis has revealed that upregulation of cytoskeletal regulators cooperate with Abrupt in Drosophila epithelial tumorigenesis, and that high expression of human BTB-ZF genes, Bcl6 and ZBTB7A, shows significant correlations with cytoskeletal and cell polarity gene expression in specific epithelial tumour types. This highlights the need for further investigation of the cooperation between these genes in mammalian systems.
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Affiliation(s)
- Nezaket Turkel
- Cell Cycle and Development Laboratory, Peter MacCallum Cancer Centre, Melbourne, Victoria 3002, Australia
| | - Marta Portela
- Cell Cycle and Development Laboratory, Peter MacCallum Cancer Centre, Melbourne, Victoria 3002, Australia
| | - Carole Poon
- Cell Cycle and Development Laboratory, Peter MacCallum Cancer Centre, Melbourne, Victoria 3002, Australia
| | - Jason Li
- Bioinformatics Core Facility, Peter MacCallum Cancer Centre, Melbourne, Victoria 3002, Australia
| | - Anthony M Brumby
- Cell Cycle and Development Laboratory, Peter MacCallum Cancer Centre, Melbourne, Victoria 3002, Australia
| | - Helena E Richardson
- Cell Cycle and Development Laboratory, Peter MacCallum Cancer Centre, Melbourne, Victoria 3002, Australia Sir Peter MacCallum Department of Oncology, Department of Anatomy and Neuroscience, Department of Biochemistry and Molecular Biology, University of Melbourne, Melbourne, Victoria 3010, Australia School of Molecular Sciences, La Trobe University, Melbourne, Victoria 3086, Australia
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Capomaccio S, Milanesi M, Bomba L, Cappelli K, Nicolazzi EL, Williams JL, Ajmone-Marsan P, Stefanon B. Searching new signals for production traits through gene-based association analysis in three Italian cattle breeds. Anim Genet 2015; 46:361-70. [DOI: 10.1111/age.12303] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Stefano Capomaccio
- Istituto di Zootecnica; UCSC; via Emilia Parmense 84 29122 Piacenza Italy
| | - Marco Milanesi
- Istituto di Zootecnica; UCSC; via Emilia Parmense 84 29122 Piacenza Italy
| | - Lorenzo Bomba
- Istituto di Zootecnica; UCSC; via Emilia Parmense 84 29122 Piacenza Italy
| | - Katia Cappelli
- Dipartimento di Medicina Veterinaria; Università di Perugia; Via San Costanzo 4 06100 Perugia Italy
| | | | - John L. Williams
- Parco Tecnologico Padano; Via Einstein; Loc. Cascina Codazza 26900 Lodi Italy
| | | | - Bruno Stefanon
- Dipartimento di Scienze Agrarie e Ambientali; Università di Udine; via delle Scienze 206-33100 Udine Italy
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Yang Y, Cui J, Xue F, Overstreet AM, Zhan Y, Shan D, Li H, Li H, Wang Y, Zhang M, Yu C, Xu ZQD. Resveratrol Represses Pokemon Expression in Human Glioma Cells. Mol Neurobiol 2015; 53:1266-1278. [PMID: 25875864 DOI: 10.1007/s12035-014-9081-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 12/29/2014] [Indexed: 01/10/2023]
Abstract
POK erythroid myeloid ontogenic factor (Pokemon), an important proto-oncoprotein, is a transcriptional repressor that regulates the expression of many genes and plays an important role in tumorigenesis. Resveratrol (RSV), a natural polyphenolic compound, has many beneficial biological effects on health. In this study, we investigated the role of Pokemon in RSV-induced biological effects and the effect of RSV on the expression of Pokemon in glioma cells. We found that overexpression of Pokemon decreased RSV-induced cell apoptosis, senescence, and anti-proliferative effects. Moreover, we showed that RSV could efficiently decrease the activity of the Pokemon promoter and the expression of Pokemon. Meanwhile, RSV also inhibited Sp1 DNA binding activity to the Pokemon promoter; whereas, it did not influence the expression and nuclear translocation of Sp1. In addition, we found that RSV could increase the recruitment of HDAC1, but decreased p300 to the Pokemon promoter. Taken together, all these results extended our understanding on the anti-cancer mechanism of RSV in glioma cells.
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Affiliation(s)
- Yutao Yang
- Department of Neurobiology, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Laboratory of Brain Disorders (MOST), Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China.
| | - Jiajun Cui
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA
| | - Feng Xue
- Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Anne-Marie Overstreet
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA
| | - Yiping Zhan
- Department of Neurosurgery, Beijing Sanbo Brain Hospital, Capital Medical University, Beijing, 100093, China.,Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Dapeng Shan
- Third Institute of Oceanography, State Oceanic Administration, Xiamen, 361005, China
| | - Hui Li
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, Lexington, KY, 40536, USA
| | - Hui Li
- Department of Neurobiology, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Laboratory of Brain Disorders (MOST), Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China
| | | | - Mengmeng Zhang
- Jiaxing Entry-Exit Inspection and Quarantine, Jiaxing, 314001, China
| | - Chunjiang Yu
- Department of Neurosurgery, Beijing Sanbo Brain Hospital, Capital Medical University, Beijing, 100093, China
| | - Zhi-Qing David Xu
- Department of Neurobiology, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Laboratory of Brain Disorders (MOST), Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China.
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Kim MY, Koh DI, Choi WI, Jeon BN, Jeong DY, Kim KS, Kim K, Kim SH, Hur MW. ZBTB2 increases PDK4 expression by transcriptional repression of RelA/p65. Nucleic Acids Res 2015; 43:1609-25. [PMID: 25609694 PMCID: PMC4330387 DOI: 10.1093/nar/gkv026] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The NF-κB is found in almost all animal cell types and is involved in a myriad of cellular responses. Aberrant expression of NF-κB has been linked to cancer, inflammatory diseases and improper development. Little is known about transcriptional regulation of the NF-κB family member gene RelA/p65. Sp1 plays a key role in the expression of the RelA/p65 gene. ZBTB2 represses transcription of the gene by inhibiting Sp1 binding to a Sp1-binding GC-box in the RelA/p65 proximal promoter (bp, -31 to -21). Moreover, recent studies revealed that RelA/p65 directly binds to the peroxisome proliferator-activated receptor-γ coactivator1α (PGC1α) to decrease transcriptional activation of the PGC1α target gene PDK4, whose gene product inhibits pyruvate dehydrogenase (PDH), a key regulator of TCA cycle flux. Accordingly, we observed that RelA/p65 repression by ZBTB2 indirectly results in increased PDK4 expression, which inhibits PDH. Consequently, in cells with ectopic ZBTB2, the concentrations of pyruvate and lactate were higher than those in normal cells, indicating changes in glucose metabolism flux favoring glycolysis over the TCA cycle. Knockdown of ZBTB2 in mouse xenografts decreased tumor growth. ZBTB2 may increase cell proliferation by reprogramming glucose metabolic pathways to favor glycolysis by upregulating PDK4 expression via repression of RelA/p65 expression.
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Affiliation(s)
- Min-Young Kim
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Dong-In Koh
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Won-Il Choi
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Bu-Nam Jeon
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Deok-yoon Jeong
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Kyung-Sup Kim
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Kunhong Kim
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Se-Hoon Kim
- Department of Pathology, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Man-Wook Hur
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1 Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
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Sartini D, Lo Muzio L, Morganti S, Pozzi V, Di Ruscio G, Rocchetti R, Rubini C, Santarelli A, Emanuelli M. Pokemon proto-oncogene in oral cancer: potential role in the early phase of tumorigenesis. Oral Dis 2015; 21:462-9. [DOI: 10.1111/odi.12304] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/04/2014] [Accepted: 11/24/2014] [Indexed: 02/06/2023]
Affiliation(s)
- D Sartini
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
| | - L Lo Muzio
- Dipartimento di Medicina Clinica e Sperimentale; Università degli Studi di Foggia; Foggia Italy
| | - S Morganti
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
| | - V Pozzi
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
| | - G Di Ruscio
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
| | - R Rocchetti
- Dipartimento di Scienze Biomediche e Sanità Pubblica; Università Politecnica delle Marche; Ancona Italy
| | - C Rubini
- Dipartimento di Scienze Biomediche e Sanità Pubblica; Università Politecnica delle Marche; Ancona Italy
| | - A Santarelli
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
- I.R.C.C.S. - I.N.R.C.A.; Ancona Italy
| | - M Emanuelli
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
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Zhao GT, Yang LJ, Li XX, Cui HL, Guo R. Expression of the proto-oncogene Pokemon in colorectal cancer--inhibitory effects of an siRNA. Asian Pac J Cancer Prev 2014; 14:4999-5005. [PMID: 24175766 DOI: 10.7314/apjcp.2013.14.9.4999] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE This study aimed to investigate expression of the proto-oncogene POK erythroid myeloid ontogenic factor (Pokemon) in colorectal cancer (CRC), and assess inhibitory effects of a small interference RNA (siRNA) expression vector in SW480 and SW620 cells. METHODS Semi-quantitative reverse transcription-polymerase chain reaction (PCR) and immunohistochemistry were performed to determine mRNA and protein expression levels of Pokemon in CRC tissues. Indirect immunofluorescence staining was applied to investigate the location of Pokemon in SW480 and SW620 cells. The siRNA expression vectors that were constructed to express a short hairpin RNA against Pokemon were transfected to the SW480 and SW620 cells with a liposome. Expression levels of Pokemon mRNA and protein were examined by real-time quantitative-fluorescent PCR and western blot analysis. The effects of Pokemon silencing on proliferation of SW480 and SW620 cells were evaluated with reference to growth curves with MTT assays. RESULTS The mRNA expression level of Pokemon in tumor tissues (0.845 ± 0.344) was significantly higher than that in adjacent tumor specimens (0.321 ± 0.197). The positive expression ratio of Pokemon protein in CRC (87.0%) was significantly higher than that in the adjacent tissues (19.6%). Strong fluorescence staining of Pokemon protein was observed in the cytoplasm of the SW480 and SW620 cells. The inhibition ratios of Pokemon mRNA and protein in the SW480 cells were 83.1% and 73.5% at 48 and 72 h, respectively, compared with those of the negative control cells with the siRNA. In the SW620 cells, the inhibition ratios of Pokemon mRNA and protein were 76.3% and 68.7% at 48 and 72 h, respectively. MTT showed that Pokemon gene silencing inhibited the proliferation of SW480 and SW620 cells. CONCLUSION Overexpression of Pokemon in CRC may have a function in carcinogenesis and progression. siRNA expression vectors could effectively inhibit mRNA and protein expression of Pokemon in SW480 and SW620 cells, thereby reducing malignant cell proliferation.
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Affiliation(s)
- Gan-Ting Zhao
- Department of Gastroenterology, Heping Hospital of Changzhi Medical College, Changzhi, China E-mail :
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Yang Y, Cui J, Xue F, Zhang C, Mei Z, Wang Y, Bi M, Shan D, Meredith A, Li H, Xu ZQD. Pokemon (FBI-1) interacts with Smad4 to repress TGF-β-induced transcriptional responses. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2014; 1849:270-81. [PMID: 25514493 DOI: 10.1016/j.bbagrm.2014.12.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 11/20/2014] [Accepted: 12/09/2014] [Indexed: 11/16/2022]
Abstract
Pokemon, an important proto-oncoprotein, is a transcriptional repressor that belongs to the POK (POZ and Krüppel) family. Smad4, a key component of TGF-β pathway, plays an essential role in TGF-β-induced transcriptional responses. In this study, we show that Pokemon can interact directly with Smad4 both in vitro and in vivo. Overexpression of Pokemon decreases TGF-β-induced transcriptional activities, whereas knockdown of Pokemon increases these activities. Interestingly, Pokemon does not affect activation of Smad2/3, formation of Smads complex, or DNA binding activity of Smad4. TGF-β1 treatment increases the interaction between Pokemon and Smad4, and also enhances the recruitment of Pokemon to Smad4-DNA complex. In addition, we also find that Pokemon recruits HDAC1 to Smad4 complex but decreases the interaction between Smad4 and p300/CBP. Taken together, all these data suggest that Pokemon is a new partner of Smad4 and plays a negative role in TGF-β pathway.
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Affiliation(s)
- Yutao Yang
- Department of Neurobiology, Beijing Key Laboratory of Major Brain Disorders, Capital Medical University, Beijing,100069, China.
| | - Jiajun Cui
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, 45267, USA; Institute of Disease Control and Prevention, Chinese Academy of Military Medical Sciences, Beijing, 100071, China
| | - Feng Xue
- Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Chuanfu Zhang
- Institute of Disease Control and Prevention, Chinese Academy of Military Medical Sciences, Beijing, 100071, China
| | - Zhu Mei
- Department of Neurobiology, Beijing Key Laboratory of Major Brain Disorders, Capital Medical University, Beijing,100069, China
| | - Yue Wang
- Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Mingjun Bi
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, 45267, USA
| | - Dapeng Shan
- Third Institute of Oceanography, State Oceanic Administration, Xiamen, 361005, China
| | - Alex Meredith
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, 45267, USA
| | - Hui Li
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, Lexington KY, 40536, USA
| | - Zhi-Qing David Xu
- Department of Neurobiology, Beijing Key Laboratory of Major Brain Disorders, Capital Medical University, Beijing,100069, China.
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Pokemon enhances proliferation, cell cycle progression and anti-apoptosis activity of colorectal cancer independently of p14ARF–MDM2–p53 pathway. Med Oncol 2014; 31:288. [DOI: 10.1007/s12032-014-0288-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Accepted: 10/09/2014] [Indexed: 02/07/2023]
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Evaluation of transforming growth factor-β1 suppress Pokemon/epithelial-mesenchymal transition expression in human bladder cancer cells. Tumour Biol 2014; 36:1155-62. [PMID: 25722217 DOI: 10.1007/s13277-014-2625-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Accepted: 09/10/2014] [Indexed: 01/08/2023] Open
Abstract
Transforming growth factor-β1 (TGF-β1) plays a dual role in apoptosis and in proapoptotic responses in the support of survival in a variety of cells. The aim of this study was to determine the function of TGF-β1 in bladder cancer cells and the relationship with POK erythroid myeloid ontogenic factor (Pokemon). TGF-β1 and its receptors mediate several tumorigenic cascades that regulate cell proliferation, migration, and survival of bladder cancer cells. Bladder cancer cells T24 were treated with different levels of TGF-β1. Levels of Pokemon, E-cadherin, Snail, MMP2, MMP9, Twist, VEGF, and β-catenin messenger RNA (mRNA) and protein were examined by real-time quantitative fluorescent PCR and Western blot analysis, respectively. The effects of TGF-β1 on epithelial-mesenchymal transition of T24 cells were evaluated with wound-healing assay, proliferation of T24 was evaluated with reference to growth curves with MTT assay, and cell invasive ability was investigated by Transwell assay. Data show that Pokemon was inhibited by TGF-β1 treatment; the gene and protein of E-cadherin and β-catenin expression level showed decreased markedly after TGF-β1 treatment (P < 0.05). While the bladder cancer cell after TGF-β1 treatment showed a significantly reduced wound-closing efficiency at 6, 12, and 24 h, mechanistic analyses demonstrated that different levels of TGF-β1 promotes tumor cell growth, migration, and invasion in bladder cancer cells (P < 0.01, P < 0.05, respectively). In summary, our findings suggest that TGF-β1 may inhibit the expression of Pokemon, β-catenin, and E-cadherin. The high expression of TGF-β1 leads to an increase in the phenotype and apical-base polarity of epithelial cells. These changes of cells may result in the recurrence and progression of bladder cancer at last. Related mechanism is worthy of further investigation.
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Jeon BN, Kim MK, Yoon JH, Kim MY, An H, Noh HJ, Choi WI, Koh DI, Hur MW. Two ZNF509 (ZBTB49) isoforms induce cell-cycle arrest by activating transcription of p21/CDKN1A and RB upon exposure to genotoxic stress. Nucleic Acids Res 2014; 42:11447-61. [PMID: 25245946 PMCID: PMC4191422 DOI: 10.1093/nar/gku857] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
ZNF509 is unique among POK family proteins in that four isoforms are generated by alternative splicing. Short ZNF509 (ZNF509S1, -S2 and -S3) isoforms contain one or two out of the seven zinc-fingers contained in long ZNF509 (ZNF509L). Here, we investigated the functions of ZNF509 isoforms in response to DNA damage, showing isoforms to be induced by p53. Intriguingly, to inhibit proliferation of HCT116 and HEK293 cells, we found that ZNF509L activates p21/CDKN1A transcription, while ZNF509S1 induces RB. ZNF509L binds to the p21/CDKN1A promoter either alone or by interacting with MIZ-1 to recruit the co-activator p300 to activate p21/CDKN1A transcription. In contrast, ZNF509S1 binds to the distal RB promoter to interact and interfere with the MIZF repressor, resulting in derepression and transcription of RB. Immunohistochemical analysis revealed that ZNF509 is highly expressed in normal epithelial cells, but was completely repressed in tumor tissues of the colon, lung and skin, indicating a possible role as a tumor suppressor.
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Affiliation(s)
- Bu-Nam Jeon
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Min-Kyeong Kim
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Jae-Hyeon Yoon
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Min-Young Kim
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Haemin An
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Hee-Jin Noh
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Won-Il Choi
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Dong-In Koh
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
| | - Man-Wook Hur
- Department of Biochemistry and Molecular Biology, Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMun-Gu, Seoul 120-752, Korea
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Wang X, Cao P, Li Z, Wu D, Wang X, Liang G. EPAS-1 mediates SP-1-dependent FBI-1 expression and regulates tumor cell survival and proliferation. Int J Mol Sci 2014; 15:15689-99. [PMID: 25192290 PMCID: PMC4200855 DOI: 10.3390/ijms150915689] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 06/27/2014] [Accepted: 08/28/2014] [Indexed: 01/01/2023] Open
Abstract
Factor binding IST-1 (FBI-1) plays an important role in oncogenic transformation and tumorigenesis. As FBI-1 is over-expressed in multiple human cancers, the regulation of itself would provide new effective options for cancer intervention. In this work, we aimed to study the role that EPAS-1 plays in regulating FBI-1. We use the fact that specificity protein-1 (SP-1) is one of the crucial transcription factors of FBI-1, and that SP-1 can interact with the endothelial pas domain protein-1 (EPAS-1) for the induction of hypoxia related genes. The study showed that EPAS-1 plays an indispensible role in SP-1 transcription factor-mediated FBI-1 induction, and participated in tumor cell survival and proliferation. Thus, EPAS-1 could be a novel target for cancer therapeutics.
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Affiliation(s)
- Xiaogang Wang
- Department of Neurosurgery, Institute of Neurology, General Hospital of Shenyang Military Area Command, Shenyang 110016, China.
| | - Peng Cao
- Department of Neurosurgery, Institute of Neurology, General Hospital of Shenyang Military Area Command, Shenyang 110016, China.
| | - Zhiqing Li
- Department of Neurosurgery, Institute of Neurology, General Hospital of Shenyang Military Area Command, Shenyang 110016, China.
| | - Dongyang Wu
- Department of Neurosurgery, Institute of Neurology, General Hospital of Shenyang Military Area Command, Shenyang 110016, China.
| | - Xi Wang
- Institute of Neuroscience, Fourth Military Medical University, Xi'an 710032, China.
| | - Guobiao Liang
- Department of Neurosurgery, Institute of Neurology, General Hospital of Shenyang Military Area Command, Shenyang 110016, China.
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Zhu M, Li M, Zhang F, Feng F, Chen W, Yang Y, Cui J, Zhang D, Linghu E. FBI-1 enhances ETS-1 signaling activity and promotes proliferation of human colorectal carcinoma cells. PLoS One 2014; 9:e98041. [PMID: 24857950 PMCID: PMC4032333 DOI: 10.1371/journal.pone.0098041] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Accepted: 04/28/2014] [Indexed: 01/29/2023] Open
Abstract
In this study, we investigated a potential regulatory role of FBI-1 in transcription factor activity of ETS-1. The protein interaction was identified between ETS-1 and FBI-1 in lovo cells. The accumulating data showed that FBI-1 promoted the recruitment of ETS-1 to endogenous promoter of its target genes and increase ETS-1 accumulation in the nuclear. Our work also indicated that the FBI-1 enhances ETS-1 transcription factor activity via down-regulating p53-mediated inhibition on ETS-1. Further, FBI-1 plays a role in regulation of colorectal carcinoma cells proliferation. These findings supported that FBI-1 might be a potential molecule target for treating colorectal carcinoma.
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Affiliation(s)
- Min Zhu
- Department of oncology, Nan Lou Division, Chinese PLA General Hospital, Beijing, P. R. China
| | - Mingyang Li
- Department of Gastroenterology, Nan Lou Division, Chinese PLA General Hospital, Beijing, P. R. China
| | - Fan Zhang
- Tumor Center, Chinese PLA General Hospital, Beijing, P. R. China
| | - Fan Feng
- Department of Pharmacy, General Hospital of Shenyang Military Command, Shenyang, P. R. China
| | - Weihao Chen
- Department of Urology, Chinese PLA General Hospital, Beijing, P. R. China
| | - Yutao Yang
- Beijing Institute for Neuroscience, Capital Medical University, Beijing, P. R. China
| | - Jiajun Cui
- Department of Cancer and cell Biology, College of Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Dong Zhang
- Department of oncology, Nan Lou Division, Chinese PLA General Hospital, Beijing, P. R. China
- * E-mail: (DZ); (EL)
| | - Enqiang Linghu
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, P. R. China
- * E-mail: (DZ); (EL)
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Bielli P, Busà R, Di Stasi SM, Munoz MJ, Botti F, Kornblihtt AR, Sette C. The transcription factor FBI-1 inhibits SAM68-mediated BCL-X alternative splicing and apoptosis. EMBO Rep 2014; 15:419-27. [PMID: 24514149 PMCID: PMC3989673 DOI: 10.1002/embr.201338241] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 12/12/2013] [Accepted: 12/12/2013] [Indexed: 01/28/2023] Open
Abstract
Alternative splicing (AS) is tightly coupled to transcription for the majority of human genes. However, how these two processes are linked is not well understood. Here, we unveil a direct role for the transcription factor FBI-1 in the regulation of AS. FBI-1 interacts with the splicing factor SAM68 and reduces its binding to BCL-X mRNA. This, in turn, results in the selection of the proximal 5' splice site in BCL-X exon 2, thereby favoring the anti-apoptotic BCL-XL variant and counteracting SAM68-mediated apoptosis. Conversely, depletion of FBI-1, or expression of a SAM68 mutant lacking the FBI-1 binding region, restores the ability of SAM68 to induce BCL-XS splicing and apoptosis. FBI-1's role in splicing requires the activity of histone deacetylases, whose pharmacological inhibition recapitulates the effects of FBI-1 knockdown. Our study reveals an unexpected function for FBI-1 in splicing modulation with a direct impact on cell survival.
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Affiliation(s)
- Pamela Bielli
- Department of Biomedicine and Prevention, University of Rome Tor VergataRome, Italy
- Laboratory of Neuroembryology, Fondazione Santa LuciaRome, Italy
| | - Roberta Busà
- Department of Biomedicine and Prevention, University of Rome Tor VergataRome, Italy
- Laboratory of Neuroembryology, Fondazione Santa LuciaRome, Italy
| | - Savino M Di Stasi
- Department of Experimental Medicine and Surgery, University of Rome Tor VergataRome, Italy
| | - Manuel J Munoz
- Laboratorio de Fisiologia y Biologia Molecular, Universidad de Buenos AiresBuenos Aires, Argentina
| | - Flavia Botti
- Department of Biomedicine and Prevention, University of Rome Tor VergataRome, Italy
| | - Alberto R Kornblihtt
- Laboratorio de Fisiologia y Biologia Molecular, Universidad de Buenos AiresBuenos Aires, Argentina
| | - Claudio Sette
- Department of Biomedicine and Prevention, University of Rome Tor VergataRome, Italy
- Laboratory of Neuroembryology, Fondazione Santa LuciaRome, Italy
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45
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BTB-ZF transcription factors, a growing family of regulators of early and late B-cell development. Immunol Cell Biol 2014; 92:481-8. [PMID: 24638067 DOI: 10.1038/icb.2014.20] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 02/18/2014] [Accepted: 02/18/2014] [Indexed: 02/06/2023]
Abstract
The differentiation of early B-cell precursors in the bone marrow into the variety of mature and effector B-cell subsets of the periphery is a complex process that requires tight regulation at the transcriptional level. Different members of the broad complex, tramtrack, bric-à-brac and zinc finger (BTB-ZF) family of transcription factors have recently been shown to have key roles in many phases of B-cell development, including early B-cell development in the bone marrow, peripheral B-cell maturation and specialization into effector cells during an immune response. This review highlights the critical functions mediated by BTB-ZF transcription factors within the B-cell lineage and emphasizes how the deregulation of these transcription factors can lead to B-cell malignancies.
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Hell MP, Thoma CR, Fankhauser N, Christinat Y, Weber TC, Krek W. miR-28-5p Promotes Chromosomal Instability in VHL-Associated Cancers by Inhibiting Mad2 Translation. Cancer Res 2014; 74:2432-43. [DOI: 10.1158/0008-5472.can-13-2041] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Guo C, Zhu K, Sun W, Yang B, Gu W, Luo J, Peng B, Zheng J. The effect of Pokemon on bladder cancer epithelial-mesenchymal transition. Biochem Biophys Res Commun 2014; 443:1226-31. [PMID: 24393848 DOI: 10.1016/j.bbrc.2013.12.115] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Accepted: 12/22/2013] [Indexed: 10/25/2022]
Abstract
OBJECTIVE This study aimed at detecting Pokemon expression in bladder cancer cell and investigating the relationship between Pokemon and epithelial-mesenchymal transition. Furthermore, we investigated the functions of Pokemon in the carcinogenesis and development of bladder cancer. This study was also designed to observe the inhibitory effects of siRNA expression vector on Pokemon in bladder cancer cell. METHODS The siRNA expression vectors which were constructed to express a short hairpin RNA against Pokemon were transfected to the bladder cancer cells T24 with a liposome. Levels of Pokemon, E-cadherin and β-catenin mRNA and protein were examined by real-time quantitative-fluorescent PCR and Western blot analysis, respectively. The effects of Pokemon silencing on epithelial-mesenchymal transition of T24 cells were evaluated with wound-healing assay. RESULTS Pokemon was strongly inhibited by siRNA treatment, especially siRNA3 treatment group, as it was reflected by Western blot and real-time PCR. The gene and protein of E-cadherin expression level showed increased markedly after Pokemon was inhibited by RNA interference. While there were no differences in the levels of gene and protein of β-catenin among five groups. The bladder cancer cell after Pokemon siRNA interference showed a significantly reduced wound-closing efficiency at 6, 12 and 24h. CONCLUSIONS Our findings suggest Pokemon may inhibit the expression of E-cadherin. The low expression of E-cadherin lead to increasing the phenotype and apical-base polarity of epithelial cells. These changes of cells may result in the recurrence and progression of bladder cancer at last.
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Affiliation(s)
- Changcheng Guo
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Kai Zhu
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Wei Sun
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Bin Yang
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Wenyu Gu
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Jun Luo
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Bo Peng
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Junhua Zheng
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
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Jin XL, Sun QS, Liu F, Yang HW, Liu M, Liu HX, Xu W, Jiang YY. microRNA 21-mediated suppression of Sprouty1 by Pokemon affects liver cancer cell growth and proliferation. J Cell Biochem 2013; 114:1625-33. [PMID: 23355454 DOI: 10.1002/jcb.24504] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 01/15/2013] [Indexed: 12/19/2022]
Abstract
Transcriptional repressor Pokemon is a critical factor in embryogenesis, development, cell proliferation, differentiation, and oncogenesis, thus behaving as an oncogene. Oncomine database suggests a potential correlation between the expressions of Pokemon and Sprouty1. This study investigated the regulatory role of Pokemon in Sprouty1 expression and the effect on liver cancer cell growth and proliferation, revealing a novel miR-21-mediated regulatory circuit. In normal (HL-7702) and cancer (QGY-7703) liver cell lines, Sprouty1 expression is inversely correlated with Pokemon levels. Targeted expression or siRNA-mediated silencing showed that Pokemon is a repressor of Sprouty1 expression at both mRNA and protein levels, but Pokemon cannot affect the promoter activity of Sprouty1. Sprouty1 is a target of miR-21 and interestingly, we found that miR-21 is up-regulated by Pokemon in liver cancer cells. Luciferase reporter assays showed that Pokemon up-regulated miR-21 transcription in a dose-dependent manner, and ChIP assay exhibited a direct binding of Pokemon to the miR-21 promoter at -747 to -399 bp. Site-directed mutagenesis of the GC boxes at -684 to -679 bp and -652 to -647 bp of miR-21 promoter abolished the regulatory activity by Pokemon. Furthermore, we found that the modulation of Pokemon and miR-21 expression affected the growth and proliferation of liver cancer cells QGY-7703. In summary, our findings demonstrate that Pokemon suppresses Sprouty1 expression through a miR-21-mediated mechanism, affecting the growth and proliferation of liver cancer cells. This study recognized miR-21 and Sprouty1 as novel targets of the Pokemon regulatory network.
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Affiliation(s)
- Xiu-Li Jin
- The State Key Laboratory Breeding Base-Shenzhen Key Laboratory of Chemical Biology, The Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, P R China
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Zhu X, Dai Y, Chen Z, Xie J, Zeng W, Lin Y. Knockdown of Pokemon protein expression inhibits hepatocellular carcinoma cell proliferation by suppression of AKT activity. Oncol Res 2013; 20:377-81. [PMID: 23924858 DOI: 10.3727/096504013x13657689383012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Overexpression of Pokemon, which is an erythroid myeloid ontogenic factor protein, occurs in different cancers, including hepatocellular carcinoma (HCC). Pokemon is also reported to have an oncogenic activity in various human cancers. This study investigated the effect of Pokemon knockdown on the regulation of HCC growth. POK shRNA suppressed the expression of Pokemon protein in HepG2 cells compared to the negative control vector-transfected HCC cells. Pokemon knockdown also reduced HCC cell viability and enhanced cisplatin-induced apoptosis in HCC cells. AKT activation and the expression of various cell cycle-related genes were inhibited following Pokemon knockdown. These data demonstrate that Pokemon may play a role in HCC progression, suggesting that inhibition of Pokemon expression using Pokemon shRNA should be further evaluated as a novel target for the control of HCC.
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Affiliation(s)
- Xiaosan Zhu
- Department of Gastroenterology, Xiamen University, Xiamen, China
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50
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St-Jean JR, Ounissi-Benkalha H, Polychronakos C. Yeast one-hybrid screen of a thymus epithelial library identifies ZBTB7A as a regulator of thymic insulin expression. Mol Immunol 2013; 56:637-42. [PMID: 23911422 DOI: 10.1016/j.molimm.2013.05.238] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/28/2013] [Accepted: 05/28/2013] [Indexed: 12/20/2022]
Abstract
Insulin self-tolerance is, to a large extent, assured by the expression of small quantities of insulin by medullary thymic epithelial cells (mTECs). Regulation of thymic insulin expression differs from that in pancreas and its therapeutic manipulation could play an important role in the prevention of type 1 diabetes (T1D). Knowledge of the transcriptional regulators involved in the mTEC nuclear environment is essential for the development of such therapeutics. The yeast one-hybrid (Y1H) approach was used in order to identify such mTEC-specific nuclear proteins. We used a target composed of the human insulin gene promoter joined to the upstream class III VNTR allele, which is associated with both protection from T1D and higher thymic insulin expression, and a cDNA library from our insulin-producing mouse mTEC line. The Y1H screening allowed the identification of eleven proteins. An in vitro assay was used to confirm and quantify protein-DNA binding to the human insulin gene promoter alone or joined to a class I or class III VNTR allele, and identified the transcription factors ZBTB7A, JUN and EWSR1 as strong interacting partners. All three proteins could induce insulin expression in transfected HEK-293 cells, but ZBTB7A provided the most robust results especially in the presence of AIRE, with an additional 11-fold increase of the insulin mRNA levels from a co-transfected reporter driven by the class III VNTR allele. Thus, ZBTB7A is identified as a strong candidate for regulation of thymic insulin expression.
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Affiliation(s)
- Julien R St-Jean
- Laboratory of Endocrine Genetics, Department of Pediatrics, The McGill University Health Center, 4060 Ste-Catherine West, Montreal, Quebec, Canada H3Z 2Z3
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