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Li Q, Tang X, Li W. Potential diagnostic markers and biological mechanism for osteoarthritis with obesity based on bioinformatics analysis. PLoS One 2023; 18:e0296033. [PMID: 38127891 PMCID: PMC10735003 DOI: 10.1371/journal.pone.0296033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 12/04/2023] [Indexed: 12/23/2023] Open
Abstract
Numerous observational studies have shown that obesity (OB) is a significant risk factor in the occurrence and progression of osteoarthritis (OA), but the underlying molecular mechanism between them remains unclear. The study aimed to identify the key genes and pathogeneses for OA with OB. We obtained two OA and two OB datasets from the gene expression omnibus (GEO) database. First, the identification of differentially expressed genes (DEGs), weighted gene co-expression network analysis (WGCNA), and machine learning algorithms were used to identify key genes for diagnosing OA with OB, and then the nomogram and receiver operating characteristic (ROC) curve were conducted to assess the diagnostic value of key genes. Second, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were performed to explore the pathogenesis of OA with OB. Third, CIBERSORT was created to investigate immunocyte dysregulation in OA and OB. In this study, two genes (SOD2, ZNF24) were finally identified as key genes for OA with OB. These two key genes had high diagnostic values via nomogram and ROC curve calculation. Additionally, functional analysis emphasized that oxidative stress and inflammation response were shared pathogenesis of OB and AD. Finally, in OA and OB, immune infiltration analysis showed that SOD2 closely correlated to M2 macrophages, regulatory T cells, and CD8 T cells, and ZNF24 correlated to regulatory T cells. Overall, our findings might be new biomarkers or potential therapeutic targets for OA and OB comorbidity.
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Affiliation(s)
- Qiu Li
- Department of Cardiovascular, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430077, China
| | - Xijie Tang
- Department of Orthopedics, Wuhan Third Hospital, School of Medicine, Wuhan University of Science and Technology, Wuhan, 430061, China
| | - Weihua Li
- Department of Cardiovascular, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430077, China
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Liu L, Lei Y, Chen W, Zhou Q, Zheng Z, Zeng G, Liu W, Feng P, Zhang Z, Yu L, Chen L. In vivo genome-wide CRISPR screening identifies ZNF24 as a negative NF-κB modulator in lung cancer. Cell Biosci 2022; 12:193. [PMID: 36457047 PMCID: PMC9717477 DOI: 10.1186/s13578-022-00933-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 11/21/2022] [Indexed: 12/03/2022] Open
Abstract
Systemic identification of tumor suppressor genes (TSGs) and elucidation of their signaling provide a new angle for understanding of tumorigenesis, which is important for developing successful treatment for lung cancer patients. In our current work, we conducted an in vivo screen for lung cancer TSGs through CRISPR/Cas9 mediated knockout of genes at genome-wide scale. We found that ZNF24 was a potent and clinically relevant TSG of lung cancer. Ectopic expression of ZNF24 arrested lung cancer cells in S phase. Mechanistically, ZNF24 bound to promoter region of P65 to negatively regulate its transcription and thereby the signaling activity of NF-κB pathway. This signaling cascade is clinically relevant. Importantly, we found that combinational inhibition of KRAS, NF-κB, and PD-1 effectively shrank autochthonous KrasG12D/ZNF24-/- lung cancers in transgenic mouse model. Our current work thus revealed an important role played by loss of function of ZNF24 in lung tumorigenesis and shed new light in precision medicine for a portion of lung cancer patients.
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Affiliation(s)
- Lu Liu
- grid.258164.c0000 0004 1790 3548MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632 China
| | - Yuxi Lei
- grid.258164.c0000 0004 1790 3548MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632 China
| | - Wensheng Chen
- grid.258164.c0000 0004 1790 3548MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632 China
| | - Qian Zhou
- grid.258164.c0000 0004 1790 3548MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632 China
| | - Zongyao Zheng
- grid.258164.c0000 0004 1790 3548MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632 China
| | - Guandi Zeng
- grid.258164.c0000 0004 1790 3548MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632 China
| | - Wanting Liu
- grid.258164.c0000 0004 1790 3548MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632 China
| | - Pengju Feng
- grid.258164.c0000 0004 1790 3548Department of Chemistry, Jinan University, Guangzhou, 510632 China
| | - Zhiyi Zhang
- grid.258164.c0000 0004 1790 3548MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632 China
| | - Lei Yu
- grid.24696.3f0000 0004 0369 153XBeijing Tongren Hospital, Capital Medical University, Beijing, 100730 China
| | - Liang Chen
- grid.258164.c0000 0004 1790 3548MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632 China
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Chen J, Guo J, Yuan Y, Wang Y. Zinc Finger Protein 24 is a Prognostic Factor in Ovarian Serous Carcinoma. Appl Immunohistochem Mol Morphol 2022; 30:136-144. [PMID: 34608874 DOI: 10.1097/pai.0000000000000980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 09/06/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVE As a member of the zinc finger protein family, zinc finger protein 24 (ZNF24) contains a Cys2His2 zinc finger domain and acts as a transcription factor. ZNF24 has been reported to be downregulated in gastric cancer and breast cancer. However, little is known about its expression and function in ovarian serous carcinoma (OSC). PATIENTS AND METHODS We collected 117 OSC patients during 2011 to 2017 and retrospectively retrieved their clinicopathologic characteristics as well as their survival data. Protein level was analyzed by immunohistochemistry, mRNA level was evaluated by RT-qPCR assay, and transcriptional data was obtained from TCGA data sets. The correlations between ZNF24 expression and patients' features were assessed using χ2 test. Univariate and multivariate analyses were used to identify the prognosis predicative potential of ZNF24 in OSC. The function of ZNF24 in the epithelial ovarian cancer cells was also verified by in vitro cellular experiments. RESULTS Among the 117 cases, ZNF24 was downregulated in 52 OSC samples (44.6%) and significantly correlated with tumor stages. According to univariate and multivariate analyses, ZNF24 can act as an independent prognostic indicator for the overall survival of OSC patients, whose lower expression was associated with poorer clinical outcomes. Ectopic overexpression and knockdown assays indicated that ZNF24 can negatively regulate the OSC cell viability. CONCLUSIONS OSC patients with low level of ZNF24 have worse overall survival compared with those possess high-ZNF24 expression. Downregulated ZNF24 may be involved in the proliferation of OSC, and ZNF24 expression can serve as an independent survival predictor.
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Affiliation(s)
- Jia Chen
- Department of Obstetrics and Gynecology, Chongqing University Central Hospital, Chongqing Emergency Medical Center
| | - Juan Guo
- Department of Obstetrics and Gynecology, The Fifth People Hospital of Chongqing
| | | | - Yadong Wang
- Breast, Chongqing Traditional Chinese Medical Hospital, Chongqing, China
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Liu Y, Wu D, Cheng H, Chen L, Zhang W, Zou L, Gao Q, Zhao Z, Chen Q, Zeng W, Zhang Z, Jiang W, Huang C, Liu G. Wnt8B, transcriptionally regulated by ZNF191, promotes cell proliferation of hepatocellular carcinoma via Wnt signaling. Cancer Sci 2020; 112:629-640. [PMID: 33197287 PMCID: PMC7894019 DOI: 10.1111/cas.14738] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 10/28/2020] [Accepted: 11/13/2020] [Indexed: 12/13/2022] Open
Abstract
Dysregulation of wingless‐type (Wnt) signaling is implicated in hepatocellular carcinoma (HCC). Wnt family member 8B (Wnt8B), one of the canonical Wnt ligands, is implicated in oncogenesis. However, the role of Wnt8B in human HCCs and its transcriptional regulation mechanism are presently unknown . Here, we report that Wnt8B expression was frequently increased in HCCs and was significantly associated with poorer patient prognosis. Wnt8B knockdown suppresses HCC cell growth both in vitro and in vivo via inhibiting the canonical Wnt signaling. Zinc finger transcription factor 191 (ZNF191) can positively regulate Wnt8B mRNA and protein expression, and promoter luciferase assay indicated that ZNF191 can increase the transcription activity of the 2‐Kbps WNT8B promoter. Chromatin immunoprecipitation‐qPCR and electrophoretic mobility shift assay showed that ZNF191 protein directly binds to the WNT8B promoter, and the binding sites are at nt‐1491(ATTAATT) and nt‐1178(ATTCATT). Moreover, Wnt8B contributes to the effect of ZNF191 on cell proliferation, and Wnt8B expression correlates positively with ZNF191 in human HCCs. Our findings suggested that Wnt8B, directly transcriptionally regulated by ZNF191, plays a pivotal role in HCC proliferation via the canonical Wnt pathway and may serve as a new prognostic biomarker and a potential therapeutic target for HCC patients.
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Affiliation(s)
- Yufeng Liu
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Di Wu
- The State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, China
| | - Hanghang Cheng
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Lei Chen
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Weidi Zhang
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Liping Zou
- Departmant of Pathology, Huashan Hospital, Fudan University, Shanghai, China
| | - Qiongmei Gao
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Zhonghua Zhao
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Qi Chen
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Wenjiao Zeng
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Zhigang Zhang
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Wei Jiang
- Key Laboratory of Metabolism and Molecular Medicine, Department of Biochemistry and Molecular Biology, The Ministry of Education, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Cheng Huang
- Department of Liver Surgery & Transplantation, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Guoyuan Liu
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, China
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5
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Huang X, Liu N, Xiong X. ZNF24 is upregulated in prostate cancer and facilitates the epithelial-to-mesenchymal transition through the regulation of Twist1. Oncol Lett 2020; 19:3593-3601. [PMID: 32269634 DOI: 10.3892/ol.2020.11456] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 12/12/2019] [Indexed: 11/06/2022] Open
Abstract
Zinc finger protein 24 (ZNF24) has been demonstrated to regulate proliferation, differentiation and migration as well as invasion in several types of cells. However, the molecular role and clinical effects of ZNF24 in prostate cancer (PCa) remain unclear. The present study revealed that ZNF24 expression is upregulated in PCa, and associated with tumor volume, Gleason score, pathological grade and metastasis. Wound healing and Transwell invasion assays revealed that ectopic ZNF24 expression facilitated cell migration and invasion through the Twist1-induced epithelial-to-mesenchymal transition (EMT) process. In addition, colony formation and Cell Counting Kit-8 assays were used to determine the regulatory effects of ZNF24 on proliferation. The results suggested that ZNF24 also promoted cell proliferation in PCa. ZNF24 acted as an oncogene and promoted migration, invasion and EMT of PCa cells via the regulation of Twist1.
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Affiliation(s)
- Xiangjiang Huang
- Department of Urology Surgery, Shenzhen People's Hospital, Shenzhen, Guangdong 518020, P.R. China.,Department of Urology Surgery, Second Clinical Medical College of Jinan University, Shenzhen, Guangdong 518020, P.R. China
| | - Nanxin Liu
- Department of Urology Surgery, Shenzhen People's Hospital, Shenzhen, Guangdong 518020, P.R. China.,Department of Urology Surgery, Second Clinical Medical College of Jinan University, Shenzhen, Guangdong 518020, P.R. China
| | - Xing Xiong
- Department of Urology Surgery, Shenzhen People's Hospital, Shenzhen, Guangdong 518020, P.R. China.,Department of Urology Surgery, Second Clinical Medical College of Jinan University, Shenzhen, Guangdong 518020, P.R. China
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6
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Novel endogenous angiogenesis inhibitors and their therapeutic potential. Acta Pharmacol Sin 2015; 36:1177-90. [PMID: 26364800 PMCID: PMC4648174 DOI: 10.1038/aps.2015.73] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 07/27/2015] [Indexed: 12/17/2022] Open
Abstract
Angiogenesis, the formation of new blood vessels from the pre-existing vasculature is essential for embryonic development and tissue homeostasis. It also plays critical roles in diseases such as cancer and retinopathy. A delicate balance between pro- and anti-angiogenic factors ensures normal physiological homeostasis. Endogenous angiogenesis inhibitors are proteins or protein fragments that are formed in the body and have the ability to limit angiogenesis. Many endogenous angiogenesis inhibitors have been discovered, and the list continues to grow. Endogenous protein/peptide inhibitors are relatively less toxic, better tolerated and have a lower risk of drug resistance, which makes them attractive as drug candidates. In this review, we highlight ten novel endogenous protein angiogenesis inhibitors discovered within the last five years, including ISM1, FKBPL, CHIP, ARHGAP18, MMRN2, SOCS3, TAp73, ZNF24, GPR56 and JWA. Although some of these proteins have been well characterized for other biological functions, we focus on their new and specific roles in angiogenesis inhibition and discuss their potential for therapeutic application.
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7
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Jia D, Huang L, Bischoff J, Moses MA. The endogenous zinc finger transcription factor, ZNF24, modulates the angiogenic potential of human microvascular endothelial cells. FASEB J 2014; 29:1371-82. [PMID: 25550468 DOI: 10.1096/fj.14-258947] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 11/24/2014] [Indexed: 11/11/2022]
Abstract
We have previously identified a zinc finger transcription factor, ZNF24 (zinc finger protein 24), as a novel inhibitor of tumor angiogenesis and have demonstrated that ZNF24 exerts this effect by repressing the transcription of VEGF in breast cancer cells. Here we focused on the role of ZNF24 in modulating the angiogenic potential of the endothelial compartment. Knockdown of ZNF24 by siRNA in human primary microvascular endothelial cells (ECs) led to significantly decreased cell migration and invasion compared with control siRNA. ZNF24 knockdown consistently led to significantly impaired VEGF receptor 2 (VEGFR2) signaling and decreased levels of matrix metalloproteinase-2 (MMP-2), with no effect on levels of major regulators of MMP-2 activity such as the tissue inhibitors of metalloproteinases and MMP-14. Moreover, silencing ZNF24 in these cells led to significantly decreased EC proliferation. Quantitative PCR array analyses identified multiple cell cycle regulators as potential ZNF24 downstream targets which may be responsible for the decreased proliferation in ECs. In vivo, knockdown of ZNF24 specifically in microvascular ECs led to significantly decreased formation of functional vascular networks. Taken together, these results demonstrate that ZNF24 plays an essential role in modulating the angiogenic potential of microvascular ECs by regulating the proliferation, migration, and invasion of these cells.
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Affiliation(s)
- Di Jia
- *Vascular Biology Program and Department of Surgery, Boston Children's Hospital, Boston, Massachusetts, USA; and Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Lan Huang
- *Vascular Biology Program and Department of Surgery, Boston Children's Hospital, Boston, Massachusetts, USA; and Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Joyce Bischoff
- *Vascular Biology Program and Department of Surgery, Boston Children's Hospital, Boston, Massachusetts, USA; and Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Marsha A Moses
- *Vascular Biology Program and Department of Surgery, Boston Children's Hospital, Boston, Massachusetts, USA; and Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
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Tata B, Huijbregts L, Jacquier S, Csaba Z, Genin E, Meyer V, Leka S, Dupont J, Charles P, Chevenne D, Carel JC, Léger J, de Roux N. Haploinsufficiency of Dmxl2, encoding a synaptic protein, causes infertility associated with a loss of GnRH neurons in mouse. PLoS Biol 2014; 12:e1001952. [PMID: 25248098 PMCID: PMC4172557 DOI: 10.1371/journal.pbio.1001952] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 08/12/2014] [Indexed: 12/20/2022] Open
Abstract
Characterization of the genetic defects causing gonadotropic deficiency has made a major contribution to elucidation of the fundamental role of Kisspeptins and Neurokinin B in puberty onset and reproduction. The absence of puberty may also reveal neurodevelopmental disorders caused by molecular defects in various cellular pathways. Investigations of these neurodevelopmental disorders may provide information about the neuronal processes controlling puberty onset and reproductive capacity. We describe here a new syndrome observed in three brothers, which involves gonadotropic axis deficiency, central hypothyroidism, peripheral demyelinating sensorimotor polyneuropathy, mental retardation, and profound hypoglycemia, progressing to nonautoimmune insulin-dependent diabetes mellitus. High-throughput sequencing revealed a homozygous in-frame deletion of 15 nucleotides in DMXL2 in all three affected patients. This homozygous deletion was associated with lower DMXL2 mRNA levels in the blood lymphocytes of the patients. DMXL2 encodes the synaptic protein rabconnectin-3α, which has been identified as a putative scaffold protein for Rab3-GAP and Rab3-GEP, two regulators of the GTPase Rab3a. We found that rabconnectin-3α was expressed in exocytosis vesicles in gonadotropin-releasing hormone (GnRH) axonal extremities in the median eminence of the hypothalamus. It was also specifically expressed in cells expressing luteinizing hormone (LH) and follicle-stimulating hormone (FSH) within the pituitary. The conditional heterozygous deletion of Dmxl2 from mouse neurons delayed puberty and resulted in very low fertility. This reproductive phenotype was associated with a lower number of GnRH neurons in the hypothalamus of adult mice. Finally, Dmxl2 knockdown in an insulin-secreting cell line showed that rabconnectin-3α controlled the constitutive and glucose-induced secretion of insulin. In conclusion, this study shows that low levels of DMXL2 expression cause a complex neurological phenotype, with abnormal glucose metabolism and gonadotropic axis deficiency due to a loss of GnRH neurons. Our findings identify rabconectin-3α as a key controller of neuronal and endocrine homeostatic processes.
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Affiliation(s)
- Brooke Tata
- Inserm, U1141, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Hôpital Robert Debré, Paris, France
| | - Lukas Huijbregts
- Inserm, U1141, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Hôpital Robert Debré, Paris, France
| | | | | | | | | | | | - Joelle Dupont
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Perrine Charles
- Genetics Department and Inserm US975, Université Pierre et Marie Curie, Hôpital la Pitié-Salpêtrière, Paris, France
| | - Didier Chevenne
- AP-HP, Laboratoire de Biochimie, Hôpital Robert Debré, Paris, France
| | - Jean-Claude Carel
- Inserm, U1141, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Hôpital Robert Debré, Paris, France
- AP-HP, Service d'Endocrinologie Diabétologie Pédiatrique et Centre de Référence des Maladies Endocriniennes Rares de la Croissance, Hôpital Robert Debré, Paris, France
| | - Juliane Léger
- Inserm, U1141, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Hôpital Robert Debré, Paris, France
- AP-HP, Service d'Endocrinologie Diabétologie Pédiatrique et Centre de Référence des Maladies Endocriniennes Rares de la Croissance, Hôpital Robert Debré, Paris, France
| | - Nicolas de Roux
- Inserm, U1141, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Hôpital Robert Debré, Paris, France
- AP-HP, Laboratoire de Biochimie, Hôpital Robert Debré, Paris, France
- * E-mail:
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A proteomic characterization of factors enriched at nascent DNA molecules. Cell Rep 2013; 3:1105-16. [PMID: 23545495 DOI: 10.1016/j.celrep.2013.03.009] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 02/13/2013] [Accepted: 03/08/2013] [Indexed: 01/07/2023] Open
Abstract
DNA replication is facilitated by multiple factors that concentrate in the vicinity of replication forks. Here, we developed an approach that combines the isolation of proteins on nascent DNA chains with mass spectrometry (iPOND-MS), allowing a comprehensive proteomic characterization of the human replisome and replisome-associated factors. In addition to known replisome components, we provide a broad list of proteins that reside in the vicinity of the replisome, some of which were not previously associated with replication. For instance, our data support a link between DNA replication and the Williams-Beuren syndrome and identify ZNF24 as a replication factor. In addition, we reveal that SUMOylation is widespread for factors that concentrate near replisomes, which contrasts with lower UQylation levels at these sites. This resource provides a panoramic view of the proteins that concentrate in the surroundings of the replisome, which should facilitate future investigations on DNA replication and genome maintenance.
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10
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Liu G, Jiang S, Wang C, Jiang W, Liu Z, Liu C, Saiyin H, Yang X, Shen S, Jiang D, Zhou P, Han D, Hu X, Yi Q, Yu L. Zinc finger transcription factor 191, directly binding to β-catenin promoter, promotes cell proliferation of hepatocellular carcinoma. Hepatology 2012; 55:1830-9. [PMID: 22213192 DOI: 10.1002/hep.25564] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
UNLABELLED Activation of β-catenin, the central effector of the canonical wingless-type (Wnt) pathway, has been implicated in hepatocellular carcinoma (HCC). However, the transcription regulation mechanism of the β-catenin gene in HCC remains unknown. Here we report that human zinc finger protein 191 (ZNF191) is a potential regulator of β-catenin transcription. ZNF191, a Krüppel-like protein, specifically interacts with the TCAT motif, which constitutes the HUMTH01 microsatellite in the tyrosine hydroxylase (TH) gene ex vivo. We demonstrate that ZNF191 is significantly overexpressed in human HCC specimens and is associated with growth of human HCC cells. Global profiling of gene expression in ZNF191 knockdown human hepatic L02 cells revealed that the important Wnt signal pathway genes β-catenin and cyclin D1 messenger RNAs (mRNAs) are significantly down-regulated. In agreement with transcription level, β-catenin and cyclin D1 proteins are also down-regulated in transient and stable ZNF191 knockdown L02 and hepatoma Hep3B cell lines. Moreover, significant correlation between ZNF191 and β-catenin mRNA expression was detected in human HCCs. Promoter luciferase assay indicated that ZNF191 can increase transcription activity of the full-length β-catenin (CTNNB1) promoter, and nucleotide (nt)-1407/-907 of the CTNNB1 promoter exhibited the maximum transcriptional activity. Electrophoretic mobility shift assay showed that purified ZNF191 protein can directly bind to the CTNNB1 promoter, and the binding region is located at nt-1254/-1224. Finally, we demonstrate that the key binding sequence of ZNF191 in vivo is ATTAATT. CONCLUSION ZNF191 can directly bind to the CTNNB1 promoter and activate the expression of β-catenin and its downstream target genes such as cyclin D1 in hepatoma cell lines. This study uncovers a new molecular mechanism of transcription regulation of the β-catenin gene in HCC.
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Affiliation(s)
- Guoyuan Liu
- State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, PR China
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11
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Tsai TC, Lin W, Yang SH, Cheng WTK, Cheng EH, Lee MS, Chong KY, Chen CM. Granzyme G is expressed in the two-cell stage mouse embryo and is required for the maternal-zygotic transition. BMC DEVELOPMENTAL BIOLOGY 2010; 10:88. [PMID: 20704734 PMCID: PMC2930601 DOI: 10.1186/1471-213x-10-88] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Accepted: 08/12/2010] [Indexed: 12/17/2022]
Abstract
Background Detailed knowledge of the molecular and cellular mechanisms that direct spatial and temporal gene expression in pre-implantation embryos is critical for understanding the control of the maternal-zygotic transition and cell differentiation in early embryonic development. In this study, twenty-three clones, expressed at different stages of early mouse development, were identified using differential display reverse transcription polymerase chain reaction (DDRT-PCR). One of these clones, which is expressed in 2-cell stage embryos at 48 hr post-hCG injection, shows a perfect sequence homology to the gene encoding the granzyme G protein. The granzyme family members are serine proteases that are present in the secretory granules of cytolytic T lymphocytes. However, the pattern of granzyme G expression and its function in early mouse embryos are entirely unknown. Results Upon the introduction of an antisense morpholino (2 mM) against granzyme G to knock-down endogenous gene function, all embryos were arrested at the 2- to 4-cell stages of egg cleavage, and the de novo synthesis of zygotic RNAs was decreased. The embryonic survival rate was dramatically decreased at the late 2-cell stage when serine protease-specific inhibitors, 0.1 mM 3,4-dichloroisocoumarin (3,4-DCI), and 2 mM phenyl methanesulphonyl fluoride (PMSF), were added to the in vitro embryonic culture medium. Survival was not affected by the addition of 0.5 mM EDTA, a metalloproteinase inhibitor. Conclusion We characterized for the first time the expression and function of granzyme G during early stage embryogenesis. Our data suggest that granzyme G is an important factor in early mouse embryonic development and may play a novel role in the elimination of maternal proteins and the triggering of zygotic gene expression during the maternal-zygotic transition.
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Affiliation(s)
- Tung-Chou Tsai
- Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan
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12
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Howng SYB, Avila RL, Emery B, Traka M, Lin W, Watkins T, Cook S, Bronson R, Davisson M, Barres BA, Popko B. ZFP191 is required by oligodendrocytes for CNS myelination. Genes Dev 2010; 24:301-11. [PMID: 20080941 DOI: 10.1101/gad.1864510] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The controlling factors that prompt mature oligodendrocytes to myelinate axons are largely undetermined. In this study, we used a forward genetics approach to identify a mutant mouse strain characterized by the absence of CNS myelin despite the presence of abundant numbers of late-stage, process-extending oligodendrocytes. Through linkage mapping and complementation testing, we identified the mutation as a single nucleotide insertion in the gene encoding zinc finger protein 191 (Zfp191), which is a widely expressed, nuclear-localized protein that belongs to a family whose members contain both DNA-binding zinc finger domains and protein-protein-interacting SCAN domains. Zfp191 mutants express an array of myelin-related genes at significantly reduced levels, and our in vitro and in vivo data indicate that mutant ZFP191 acts in a cell-autonomous fashion to disrupt oligodendrocyte function. Therefore, this study demonstrates that ZFP191 is required for the myelinating function of differentiated oligodendrocytes.
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Affiliation(s)
- Shen Yi B Howng
- Department of Human Genetics, The University of Chicago, Chicago, Illinois 60637, USA
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Khalfallah O, Ravassard P, Lagache CS, Fligny C, Serre A, Bayard E, Faucon-Biguet N, Mallet J, Meloni R, Nardelli J. Zinc finger protein 191 (ZNF191/Zfp191) is necessary to maintain neural cells as cycling progenitors. Stem Cells 2009; 27:1643-53. [PMID: 19544452 DOI: 10.1002/stem.88] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The identification of the factors that allow better monitoring of stem cell renewal and differentiation is of paramount importance for the implementation of new regenerative therapies, especially with regard to the nervous and hematopoietic systems. In this article, we present new information on the function of zinc finger protein 191 (ZNF/Zfp191), a factor isolated in hematopoietic cell lines, within progenitors of the central nervous system (CNS). ZNF/Zfp191 has been found to be principally expressed in progenitors of the developing CNS of humans and mice. Such an overlap of the expression patterns in addition to the high homology of the protein in mammals suggested that ZNF/Zfp191 exerts a conserved function within such progenitors. Indeed, ZNF191 knockdown in human neural progenitors inhibits proliferation and leads to the exit of the cell cycle. Conversely, ZNF191 misexpression maintains progenitors in cycle and exerts negative control on the Notch pathway, which prevents them from differentiating. The present data, together with the fact that the inactivation of Zfp191 leads to embryonic lethality, confirm ZNF191 as an essential factor acting for the promotion of the cell cycle and thus maintenance in the progenitor stage. On the bases of expression data, such a function can be extended to progenitor cells of other tissues such as the hematopoietic system, which emphasizes the important issue of further understanding the molecular events controlled by ZNF/Zfp191.
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Affiliation(s)
- Olfa Khalfallah
- CRICM UPMC/Inserm UMR_S 975;CNRS UMR 7225, Biotechnology and Biotherapy Laboratory F-75005, Paris, France
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Li J, Chen X, Gong X, Liu Y, Feng H, Qiu L, Hu Z, Zhang J. A transcript profiling approach reveals the zinc finger transcription factor ZNF191 is a pleiotropic factor. BMC Genomics 2009; 10:241. [PMID: 19463170 PMCID: PMC2694838 DOI: 10.1186/1471-2164-10-241] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2008] [Accepted: 05/22/2009] [Indexed: 12/12/2022] Open
Abstract
Background The human zinc finger protein 191 (ZNF191) is a member of the SCAN domain family of Krüppel-like zinc finger transcription factors. ZNF191 shows 94% identity to its mouse homologue zinc finger protein 191(Zfp191), which is the most highly conserved among the human-mouse SCAN family member orthologues pairs. Zfp191 is widely expressed during early embryogenesis and in adult organs. Moreover, Zfp191-/- embryos have been shown to be severely retarded in development and die approximately at embryonic day E7.5. ZNF191 can specifically interact with the widespread TCAT motif which constitutes the HUMTH01 microsatellite in the tyrosine hydroxylase (TH) gene. Allelic variations of HUMTH01 have been stated to have a quantitative silencing effect on TH gene expression and to correlate with quantitative and qualitative changes in the binding by ZNF191. In addition, ZNF191 displays a suppressive effect on the transcription; however, little downstream targets have identified. Results We searched for ZNF191 target genes by using a transient overexpression and knockdown strategy in the human embryo kidney (HEK293) cells. Microarray analyses identified 6094 genes modulated by overexpression of ZNF191 and 3332 genes regulated by knockdown of ZNF191, using a threshold of 1.2-fold. Several interested candidate genes, validated by real time RT-PCR, were correlated well with the array data. Interestingly, 1456 genes were identified in both transient overexpression and transient knockdown strategies. The GenMAPP and MappFinder software packages were further used for pathway analysis of these significantly altered genes. Several gene pathways were found to be involved in processes of the regulation of kinase activity, transcription, angiogenesis, brain development and response to DNA damage. Conclusion Our analysis reveals for the first time that ZNF191 is a pleiotropic factor that has a role in hematopoiesis, brain development and cancers.
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Affiliation(s)
- Jianzhong Li
- Department of Biochemical Pharmacy, Second Military Medical University, Shanghai, PR China.
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Wang H, Sun R, Liu G, Yao M, Fei J, Shen H. Characterization of the target DNA sequence for the DNA-binding domain of zinc finger protein 191. Acta Biochim Biophys Sin (Shanghai) 2008. [DOI: 10.1111/j.1745-7270.2008.00450.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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