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de Tribolet-Hardy J, Thorball CW, Forey R, Planet E, Duc J, Coudray A, Khubieh B, Offner S, Pulver C, Fellay J, Imbeault M, Turelli P, Trono D. Genetic features and genomic targets of human KRAB-zinc finger proteins. Genome Res 2023; 33:1409-1423. [PMID: 37730438 PMCID: PMC10547255 DOI: 10.1101/gr.277722.123] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 07/18/2023] [Indexed: 09/22/2023]
Abstract
Krüppel-associated box (KRAB) domain-containing zinc finger proteins (KZFPs) are one of the largest groups of transcription factors encoded by tetrapods, with 378 members in human alone. KZFP genes are often grouped in clusters reflecting amplification by gene and segment duplication since the gene family first emerged more than 400 million years ago. Previous work has revealed that many KZFPs recognize transposable element (TE)-embedded sequences as genomic targets, and that KZFPs facilitate the co-option of the regulatory potential of TEs for the benefit of the host. Here, we present a comprehensive survey of the genetic features and genomic targets of human KZFPs, notably completing past analyses by adding data on close to a hundred family members. General principles emerge from our study of the TE-KZFP regulatory system, which point to multipronged evolutionary mechanisms underlaid by highly complex and combinatorial modes of action with strong influences on human speciation.
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Affiliation(s)
- Jonas de Tribolet-Hardy
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Christian W Thorball
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Romain Forey
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Evarist Planet
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Julien Duc
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Alexandre Coudray
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Bara Khubieh
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Sandra Offner
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Cyril Pulver
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Jacques Fellay
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
- Precision Medicine Unit, Lausanne University Hospital (CHUV) and University of Lausanne, 1010 Lausanne, Switzerland
| | - Michael Imbeault
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Priscilla Turelli
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Didier Trono
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland;
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2
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Wu W, Yao S, Huang J, Qing J, Shi Q, Huang J, Qiu X, Zhuang Y. The Expression of ZNF268 and Its Role in The Cisplatin-based Chemoresistance of Breast Cancer. Heliyon 2023; 9:e18779. [PMID: 37664731 PMCID: PMC10469720 DOI: 10.1016/j.heliyon.2023.e18779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 09/05/2023] Open
Abstract
Objective Breast cancer is one of the most prevalent cancers in females worldwide and is one of the leading causes of cancer death and disability in women. Multiple therapies have been applied to breast cancer treatment; however, the long-term survival rate remains low. Although cisplatin has been widely utilized for cancer therapy, chemoresistance still influences the outcome. Methods After collecting the breast cancer cell line MDA-MB-231 treated with or without cisplatin and sample information from The Cancer Genome Atlas Program (TCGA), we screened out their common parameters and influences on the prognoses of patients' potential targets. Surgical excisional tissue sections of patients with breast cancer who were admitted and treated in the Department of Breast and Thyroid Surgery, Liuzhou People's Hospital from 2017 to 2020 was collected and follow up. After a series of assays combined with clinical information, we tested the reliability of the target. Results We found that a high expression level of ZNF268 in breast cancer cell lines significantly enhances the sensitivity to cisplatin, contrary to the effects of low expression. Furthermore, a significantly worse prognosis was observed in patients with a high expression of ZNF268 after cisplatin chemotherapy. Conclusion The expression level of ZNF268 in breast cancer patients after cisplatin chemotherapy may become a potential target to predict the chemoresistance of patients to cisplatin. This study provides a novel idea for improving breast cancer treatment and survival rates.
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Affiliation(s)
- Weilu Wu
- Department of Breast and Thyroid Surgery, Liuzhou People's Hospital, Guangxi, China
| | - Shucong Yao
- Department of Oral and Maxillofacial Surgery, Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, China
- Department of Oral and Maxillofacial Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jiapeng Huang
- Department of Breast and Thyroid Surgery, Liuzhou People's Hospital, Guangxi, China
| | - Jialin Qing
- Department of Breast and Thyroid Surgery, Liuzhou People's Hospital, Guangxi, China
| | - Qingmei Shi
- Department of Breast and Thyroid Surgery, Liuzhou People's Hospital, Guangxi, China
| | - Jianping Huang
- Department of Breast and Thyroid Surgery, Liuzhou People's Hospital, Guangxi, China
| | - Xingsheng Qiu
- Department of Radiation Oncology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yaqiang Zhuang
- Department of Breast and Thyroid Surgery, Liuzhou People's Hospital, Guangxi, China
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Wang K, Gu Y, Ni J, Zhang H, Wang Y, Zhang Y, Sun X, Xu T, Mao W, Peng B. Noncoding-RNA mediated high expression of zinc finger protein 268 suppresses clear cell renal cell carcinoma progression by promoting apoptosis and regulating immune cell infiltration. Bioengineered 2022; 13:10467-10481. [PMID: 35735115 PMCID: PMC9161828 DOI: 10.1080/21655979.2022.2060787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Clear cell renal cell carcinoma (ccRCC) is one of the most common malignant kidney tumors with a poor prognosis. Accumulating evidence proves that zinc finger protein 268 (ZNF268) is associated with tumor progression, but the detailed regulatory functions of ZNF268 in ccRCC require further exploration. Thus, here we aim to characterize the role of ZNF268 in ccRCC. The clinical significance of ZNF268 was evaluated using The Cancer Genome Atlas (TCGA) and the Genotype-Tissue Expression (GTEx) databases. Subsequently, tumor-infiltrating immune cells, as well as upstream noncoding RNAs (ncRNAs) related to the tumor-suppressing function of ZNF268, were identified by in silico analyses. The expression of ZNF268 was significantly decreased in ccRCC samples compared with adjacent normal tissues. In addition, ZNF268 expression was negatively correlated with tumor progression and positively correlated with overall and disease-specific survival. TCGA and GTEx databases proved the potential tumor-suppressing function, which was measured both in vitro and in vivo after ZNF268 over-expression. Overexpression of ZNF268 effectively inhibited the proliferation, migration, invasion and promotied apoptosis of the Caki-1. The level of ZNF268 was positively related to the immune cell infiltration in the tumor. Moreover, we determined that the AC093157.1/miR-27a-3p axis can potentially regulate ZNF268 function in ccRCC. Our work describes a novel ncRNA-mediated ZNF268 function in ccRCC. ZNF268 acts as a tumor suppressor, and it is associated with apoptosis and immune cell infiltration in ccRCC.
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Affiliation(s)
- Keyi Wang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, Zha Bei Qu, China
| | - Yongzhe Gu
- Department of Neurology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, Zha Bei Qu, China
| | - Jinliang Ni
- Shanghai Clinical College, Anhui Medical University, Hefei, Anhui Province, China
| | - Houliang Zhang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, Zha Bei Qu, China
| | - Yidi Wang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, Zha Bei Qu, China
| | - Yifan Zhang
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, Zha Bei Qu, China
| | - Xianchao Sun
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, Zha Bei Qu, China
| | - Tianyuan Xu
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, Zha Bei Qu, China
| | - Weipu Mao
- Department of Urology, Affiliated Zhongda Hospital of Southeast University, Nanjing, Jiangsu, China
| | - Bo Peng
- Department of Urology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, Zha Bei Qu, China
- Shanghai Clinical College, Anhui Medical University, Hefei, Anhui Province, China
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Ropa J, Broxmeyer HE. An expanded role for dipeptidyl peptidase 4 in cell regulation. Curr Opin Hematol 2021; 27:215-224. [PMID: 32487805 DOI: 10.1097/moh.0000000000000590] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW Dipeptidyl peptidase 4 (DPP4) is a serine protease with diverse regulatory functions in healthy and diseased cells. Much remains unknown about the mechanisms and targets of DPP4. Here we discuss new studies exploring DPP4-mediated cellular regulation, provide an updated list of potential targets of DPP4, and discuss clinical implications of each. RECENT FINDINGS Recent studies have sought enhanced efficacy of targeting DPP4's role in regulating hematopoietic stem and progenitor cells for improved clinical application. Further studies have identified DPP4 functions in different cellular compartments and have proposed ways to target this protein in malignancy. These findings, together with an expanded list of putative extracellular, cell surface, and intracellular DPP4 targets, provide insight into new DPP4-mediated cell regulation. SUMMARY DPP4 posttranslationally modifies proteins and peptides with essential roles in hematopoietic cell regulation, stem cell transplantation, and malignancy. Targets include secreted signaling factors and may include membrane proteins and transcription factors critical for different hematopoietic functions. Knowing these targets and functions can provide insight into new regulatory roles for DPP4 that may be targeted to enhance transplantation, treat disease, and better understand different regulatory pathways of hematopoiesis.
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Affiliation(s)
- James Ropa
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, USA
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Helleboid P, Heusel M, Duc J, Piot C, Thorball CW, Coluccio A, Pontis J, Imbeault M, Turelli P, Aebersold R, Trono D. The interactome of KRAB zinc finger proteins reveals the evolutionary history of their functional diversification. EMBO J 2019; 38:e101220. [PMID: 31403225 PMCID: PMC6745500 DOI: 10.15252/embj.2018101220] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 07/03/2019] [Accepted: 07/10/2019] [Indexed: 01/24/2023] Open
Abstract
Krüppel-associated box (KRAB)-containing zinc finger proteins (KZFPs) are encoded in the hundreds by the genomes of higher vertebrates, and many act with the heterochromatin-inducing KAP1 as repressors of transposable elements (TEs) during early embryogenesis. Yet, their widespread expression in adult tissues and enrichment at other genetic loci indicate additional roles. Here, we characterized the protein interactome of 101 of the ~350 human KZFPs. Consistent with their targeting of TEs, most KZFPs conserved up to placental mammals essentially recruit KAP1 and associated effectors. In contrast, a subset of more ancient KZFPs rather interacts with factors related to functions such as genome architecture or RNA processing. Nevertheless, KZFPs from coelacanth, our most distant KZFP-encoding relative, bind the cognate KAP1. These results support a hypothetical model whereby KZFPs first emerged as TE-controlling repressors, were continuously renewed by turnover of their hosts' TE loads, and occasionally produced derivatives that escaped this evolutionary flushing by development and exaptation of novel functions.
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Affiliation(s)
| | - Moritz Heusel
- Department of BiologyInstitute of Molecular Systems BiologyETH ZurichZurichSwitzerland
| | - Julien Duc
- School of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
| | - Cécile Piot
- School of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
| | - Christian W Thorball
- School of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
| | - Andrea Coluccio
- School of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
| | - Julien Pontis
- School of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
| | - Michaël Imbeault
- School of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
| | - Priscilla Turelli
- School of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
| | - Ruedi Aebersold
- Department of BiologyInstitute of Molecular Systems BiologyETH ZurichZurichSwitzerland
- Faculty of ScienceUniversity of ZurichZurichSwitzerland
| | - Didier Trono
- School of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
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Hu J, Meng Y, Zeng J, Zeng B, Jiang X. Ubiquitin E3 Ligase MARCH7 promotes proliferation and invasion of cervical cancer cells through VAV2-RAC1-CDC42 pathway. Oncol Lett 2018; 16:2312-2318. [PMID: 30008934 PMCID: PMC6036418 DOI: 10.3892/ol.2018.8908] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 10/19/2017] [Indexed: 12/25/2022] Open
Abstract
Ubiquitin E3 Ligase MARCH7 is involved in T cell proliferation and neuronal development. In our previous study, we demonstrated MARCH7 promoted malignant behavior of ovarian cancer via the nuclear factor (NF)-κB and Wnt/β-catenin signaling pathway. However, the expression and function of MARCH7 in cervical cancer remains unknown. The present study aimed to unravel the expression and function of MARCH7 in cervical cancer to elucidate its potential role in the diagnosis and pathogenesis of cervical cancer. Results indicated that the expression of MARCH7 was abnormally high in cervical cancer tissues than normal cervical tissues. However, silencing the expression of MARCH7 in HeLa cells resulted in decreased cell proliferation and invasion. Mechanistic investigations revealed that MARCH7 interacted with VAV2. Silencing the expression of MARCH7 in HeLa cells inhibited the VAV2-RAC1-CDC42 signaling pathway. Overall, the results of the present study identified MARCH7 as a candidate oncogene in cervical cancer, and a potential target for cervical cancer therapy.
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Affiliation(s)
- Jianguo Hu
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, P.R. China
| | - Ying Meng
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, P.R. China
| | - Jianhua Zeng
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, P.R. China
| | - Biao Zeng
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, P.R. China
| | - Xingwei Jiang
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, P.R. China
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7
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Abstract
Krüppel-associated box domain zinc finger proteins (KRAB-ZFPs) are the largest family of transcriptional regulators in higher vertebrates. Characterized by an N-terminal KRAB domain and a C-terminal array of DNA-binding zinc fingers, they participate, together with their co-factor KAP1 (also known as TRIM28), in repression of sequences derived from transposable elements (TEs). Until recently, KRAB-ZFP/KAP1-mediated repression of TEs was thought to lead to irreversible silencing, and the evolutionary selection of KRAB-ZFPs was considered to be just the host component of an arms race against TEs. However, recent advances indicate that KRAB-ZFPs and their TE targets also partner up to establish species-specific regulatory networks. Here, we provide an overview of the KRAB-ZFP gene family, highlighting how its evolutionary history is linked to that of TEs, and how KRAB-ZFPs influence multiple aspects of development and physiology.
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Affiliation(s)
- Gabriela Ecco
- School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Station19, 1015 Lausanne, Switzerland
| | - Michael Imbeault
- School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Station19, 1015 Lausanne, Switzerland
| | - Didier Trono
- School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Station19, 1015 Lausanne, Switzerland
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8
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Ling L, Wei T, He L, Wang Y, Wang Y, Feng X, Zhang W, Xiong Z. Low-intensity pulsed ultrasound activates ERK1/2 and PI3K-Akt signalling pathways and promotes the proliferation of human amnion-derived mesenchymal stem cells. Cell Prolif 2017; 50. [PMID: 28940899 DOI: 10.1111/cpr.12383] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 08/18/2017] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES This study was to investigate the effect and mechanism of low-intensity pulsed ultrasound (LIPUS) on the proliferation of human amnion-derived mesenchymal stem cells (hAD-MSCs). METHODS Human amnion-derived mesenchymal stem cells were isolated from the amnion of term placentas and identified by flow cytometry and differentiation culture. Proliferation of hAD-MSCs was investigated by Cell Counting Kit-8, cell cycle and EdU assays. Western blotting was used to determine the protein expression levels. RESULTS Human amnion-derived mesenchymal stem cells were successfully isolated from the amnion and identified as multipotent mesenchymal stem cells. Low-intensity pulsed ultrasound promoted the proliferation of hAD-MSCs. Cell cycle analysis showed that LIPUS promoted cells to enter S and G2/M phases from G0/G1 phase. Western blot results showed that LIPUS promoted the phosphorylation and activation of ERK1/2 and Akt and significantly upregulated expression of cyclin D1, cyclin E1, cyclin A2 and cyclin B1. ERK1/2 inhibitor (U0126) and PI3K inhibitor (LY294002) significantly reduced LIPUS-induced phosphorylation of ERK1/2 and Akt, respectively, which in turn reduced the LIPUS-induced proliferation of hAD-MSCs. CONCLUSIONS Low-intensity pulsed ultrasound can promote the proliferation of hAD-MSCs, and ERK1/2 and PI3K-Akt signalling pathways may play important roles in this process.
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Affiliation(s)
- Li Ling
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Tianqin Wei
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Lianli He
- Department of Obstetrics and Gynecology, Third Affiliated Hospital, Zunyi Medical College, Guizhou, 563000, China
| | - Yaping Wang
- Department of Histology and Embryology, Laboratory of Stem Cell and Tissue Engineering, Chongqing Medical University, Chongqing, 400010, China
| | - Yan Wang
- State Key Laboratory of Ultrasound Engineering in Medicine Co-Founded by Chongqing and the Ministry of Science and Technology, Chongqing Key Laboratory of Biomedical Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, 400010, China
| | - Xiushan Feng
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Wenqian Zhang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Zhengai Xiong
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
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Low expression of lncRNA-GAS5 is implicated in human primary varicose great saphenous veins. PLoS One 2015; 10:e0120550. [PMID: 25806802 PMCID: PMC4373870 DOI: 10.1371/journal.pone.0120550] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 01/23/2015] [Indexed: 12/20/2022] Open
Abstract
The cellular mechanisms of primary varicose great saphenous veins (GSVs) involve inflammation, apoptosis, and proliferation of local cells and extracellular matrix degradation. Long non-coding RNAs (lncRNAs) play important roles in these cellular processes; however, which and how lncRNAs related to these mechanisms take effect on GSVs remain unclear. By screening lncRNAs that might experience changes in GSV varicosities, we selected the lower expressed lncRNA-GAS5 (growth arrest specific transcript 5) for functional assessments. Silencing of lncRNA-GAS5 promoted cell proliferation and migration, and cell cycle of the human saphenous vein smooth muscle cells (HSVSMCs), whereas overexpressing it inhibited these cellular behaviors and reduced apoptosis of HSVSMCs. RNA pull-down experiment revealed a direct bind of lncRNA-GAS5 to a Ca2+-dependent RNA-binding protein, Annexin A2. Further experiments showed that silencing of Annexin A2 reduced the HSVSMCs proliferation and vice versa. In the context of lncRNA-GAS5 knockdown, silencing of Annexin A2 reduced the proliferation of HSVSMCs while overexpression of Annexin A2 increased the proliferation. Thus, the low expression of lncRNA-GAS5 may facilitate HSVSMCs proliferation and migration through Annexin A2 and thereby the pathogenesis of GSV varicosities.
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Cai J, Gong R, Yan F, Yu C, Liu L, Wang W, Lin Y, Guo M, Li W, Huang Z. ZNF300 knockdown inhibits forced megakaryocytic differentiation by phorbol and erythrocytic differentiation by arabinofuranosyl cytidine in K562 cells. PLoS One 2014; 9:e114768. [PMID: 25485965 PMCID: PMC4259388 DOI: 10.1371/journal.pone.0114768] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 11/13/2014] [Indexed: 01/16/2023] Open
Abstract
Previously, we reported that ZNF300 might play a role in leukemogenesis. In this study, we further investigated the function of ZNF300 in K562 cells undergoing differentiation. We found that ZNF300 upregulation in K562 cells coincided with megakaryocytic differentiation induced by phorbol-12-myristate-13-acetate (PMA) or erythrocytic differentiation induced by cytosine arabinoside (Ara-C), respectively. To further test whether ZNF300 upregulation promoted differentiation, we knocked down ZNF300 and found that ZNF300 knockdown effectively abolished PMA-induced megakaryocytic differentiation, evidenced by decreased CD61 expression. Furthermore, Ara-C-induced erythrocytic differentiation was also suppressed in ZNF300 knockdown cells with decreased γ-globin expression and CD235a expression. These observations suggest that ZNF300 may be a critical factor controlling distinct aspects of K562 cells. Indeed, ZNF300 knockdown led to increased cell proliferation. Consistently, ZNF300 knockdown cells exhibited an increased percentage of cells at S phase accompanied by decreased percentage of cells at G0/G1 and G2/M phase. Increased cell proliferation was further supported by the increased expression of cell proliferation marker PCNA and the decreased expression of cell cycle regulator p15 and p27. In addition, MAPK/ERK signaling was significantly suppressed by ZNF300 knockdown. These findings suggest a potential mechanism by which ZNF300 knockdown may impair megakaryocytic and erythrocytic differentiation.
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Affiliation(s)
- Jinyang Cai
- State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, China
- College of Life Sciences, Wuhan University, Wuhan, Hubei, China
| | - Rui Gong
- Hubei International Travel Healthcare Center, Hubei Entry-Exit Inspection and Quarantine Bureau of P. R. China, Wuhan, Hubei, China
| | - Fengjuan Yan
- College of Life Sciences, Wuhan University, Wuhan, Hubei, China
| | - Chunjie Yu
- College of Life Sciences, Wuhan University, Wuhan, Hubei, China
| | - Lu Liu
- College of Life Sciences, Wuhan University, Wuhan, Hubei, China
| | - Wei Wang
- State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, China
- College of Life Sciences, Wuhan University, Wuhan, Hubei, China
| | - Yi Lin
- College of Life Sciences, Wuhan University, Wuhan, Hubei, China
| | - Mingxiong Guo
- College of Life Sciences, Wuhan University, Wuhan, Hubei, China
| | - Wenxin Li
- State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, China
- College of Life Sciences, Wuhan University, Wuhan, Hubei, China
- * E-mail: (WL); (ZH)
| | - Zan Huang
- College of Life Sciences, Wuhan University, Wuhan, Hubei, China
- * E-mail: (WL); (ZH)
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11
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Han D, Zhang C, Fan WJ, Pan WJ, Feng DM, Qu SL, Jiang ZS. Myocardial ischemic preconditioning upregulated protein 1(Mipu1):zinc finger protein 667 - a multifunctional KRAB/C2H2 zinc finger protein. ACTA ACUST UNITED AC 2014; 48:1-5. [PMID: 25493376 PMCID: PMC4288486 DOI: 10.1590/1414-431x20144029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 07/23/2014] [Indexed: 11/22/2022]
Abstract
Myocardial ischemic preconditioning upregulated protein 1 (Mipu1) is a newly discovered upregulated gene produced in rats during the myocardial ischemic preconditioning process. Mipu1 cDNA contains a 1824-base pair open reading frame and encodes a 608 amino acid protein with an N-terminal Krüppel-associated box (KRAB) domain and classical zinc finger C2H2 motifs in the C-terminus. Mipu1 protein is located in the cell nucleus. Recent studies found that Mipu1 has a protective effect on the ischemia-reperfusion injury of heart, brain, and other organs. As a nuclear factor, Mipu1 may perform its protective function through directly transcribing and repressing the expression of proapoptotic genes to repress cell apoptosis. In addition, Mipu1 also plays an important role in regulating the gene expression of downstream inflammatory mediators by inhibiting the activation of activator protein-1 and serum response element.
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Affiliation(s)
- D Han
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - C Zhang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - W J Fan
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - W J Pan
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - D M Feng
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - S L Qu
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - Z S Jiang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
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12
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Wang W, Cai J, Lin Y, Liu Z, Ren Q, Hu L, Huang Z, Guo M, Li W. Zinc fingers function cooperatively with KRAB domain for nuclear localization of KRAB-containing zinc finger proteins. PLoS One 2014; 9:e92155. [PMID: 24647005 PMCID: PMC3960175 DOI: 10.1371/journal.pone.0092155] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2013] [Accepted: 02/18/2014] [Indexed: 11/18/2022] Open
Abstract
Multiple nuclear localization domains have been identified in nuclear proteins, and they finely control nuclear import and functions of those proteins. ZNF268 is a typical KRAB-containing zinc finger protein (KRAB-ZFP), and previous studies have shown that the KRAB domain reinforces nuclear localization of KRAB-ZFPs by interacting with KAP1. In this study, we find that some of 24 zinc fingers of ZNF268 also possess nuclear localization activity. Results of mutagenesis studies suggest that KRAB and zinc fingers are both necessary, and they function both independently and cooperatively for the nuclear localization of ZNF268. However, the subnuclear targeting activities of KRAB and zinc fingers are different. KRAB targets proteins in nucleoplasm, but not in the nucleolus, which is mediated by interaction with KAP1, while zinc fingers target proteins in the whole nucleus uniformly. The cooperative activities of KAP1-KRAB-zinc fingers result in the precise nucleoplasmic, but not nucleolar localization of KRAB-ZFPs. Our studies reveal a novel mechanism for the subcellular localization of KRAB-ZFPs and may help us to further explore their biological functions.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Jinyang Cai
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Yi Lin
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Zikou Liu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Qihao Ren
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Li Hu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Zan Huang
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Mingxiong Guo
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
- * E-mail: (MG); (WL)
| | - Wenxin Li
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
- * E-mail: (MG); (WL)
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Ma J, Hu Y, Guo M, Huang Z, Li W, Wu Y. hERG potassium channel blockage by scorpion toxin BmKKx2 enhances erythroid differentiation of human leukemia cells K562. PLoS One 2013; 8:e84903. [PMID: 24386436 PMCID: PMC3873423 DOI: 10.1371/journal.pone.0084903] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 11/28/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The hERG potassium channel can modulate the proliferation of the chronic myelogenous leukemic K562 cells, and its role in the erythroid differentiation of K562 cells still remains unclear. PRINCIPAL FINDINGS The hERG potassium channel blockage by a new 36-residue scorpion toxin BmKKx2, a potent hERG channel blocker with IC50 of 6.7 ± 1.7 nM, enhanced the erythroid differentiation of K562 cells. The mean values of GPA (CD235a) fluorescence intensity in the group of K562 cells pretreated by the toxin for 24 h and followed by cytosine arabinoside (Ara-C) treatment for 72 h were about 2-fold stronger than those of K562 cells induced by Ara-C alone. Such unique role of hERG potassium channel was also supported by the evidence that the effect of the toxin BmKKx2 on cell differentiation was nullified in hERG-deficient cell lines. During the K562 cell differentiation, BmKKx2 could also suppress the expression of hERG channels at both mRNA and protein levels. Besides the function of differentiation enhancement, BmKKx2 was also found to promote the differentiation-dependent apoptosis during the differentiation process of K562 cells. In addition, the blockage of hERG potassium channel by toxin BmKKx2 was able to decrease the intracellular Ca(2+) concentration during the K562 cell differentiation, providing an insight into the mechanism of hERG potassium channel regulating this cellular process. CONCLUSIONS/SIGNIFICANCE Our results revealed scorpion toxin BmKKx2 could enhance the erythroid differentiation of leukemic K562 cells via inhibiting hERG potassium channel currents. These findings would not only accelerate the functional research of hERG channel in different leukemic cells, but also present the prospects of natural scorpion toxins as anti-leukemic drugs.
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Affiliation(s)
- Jian Ma
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Youtian Hu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Mingxiong Guo
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Zan Huang
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Wenxin Li
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
- * E-mail: (WL); (YW)
| | - Yingliang Wu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
- * E-mail: (WL); (YW)
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14
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Lupo A, Cesaro E, Montano G, Zurlo D, Izzo P, Costanzo P. KRAB-Zinc Finger Proteins: A Repressor Family Displaying Multiple Biological Functions. Curr Genomics 2013; 14:268-78. [PMID: 24294107 PMCID: PMC3731817 DOI: 10.2174/13892029113149990002] [Citation(s) in RCA: 168] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 05/15/2013] [Accepted: 05/16/2013] [Indexed: 12/23/2022] Open
Abstract
Zinc finger proteins containing the Kruppel associated box (KRAB-ZFPs) constitute the largest individual family of transcriptional repressors encoded by the genomes of higher organisms. KRAB domain, positioned at the NH2 terminus of the KRAB-ZFPs, interacts with a scaffold protein, KAP-1, which is able to recruit various transcriptional factors causing repression of genes to which KRAB ZFPs bind. The relevance of such repression is reflected in the large number of the KRAB zinc finger protein genes in the human genome. However, in spite of their numerical abundance little is currently known about the gene targets and the physiological functions of KRAB- ZFPs. However, emerging evidence links the transcriptional repression mediated by the KRAB-ZFPs to cell proliferation, differentiation, apoptosis and cancer. Moreover, the fact that KRAB containing proteins are vertebrate-specific suggests that they have evolved recently, and that their key roles lie in some aspects of vertebrate development. In this review, we will briefly discuss some regulatory functions of the KRAB-ZFPs in different physiological and pathological states, thus contributing to better understand their biological roles.
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Affiliation(s)
- Angelo Lupo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", Via S. Pansini 5, 80131 Napoli, Italy; ; Dipartimento di Scienze per la Biologia, la Geologia e l'Ambiente, Facoltà di Scienze, Università del Sannio, Via Port'Arsa 11, 82100 Benevento, Italy
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15
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Hu L, Wang W, Cai J, Luo J, Huang Y, Xiong S, Li W, Guo M. Aberrant expression of ZNF268 alters the growth and migration of ovarian cancer cells. Oncol Lett 2013; 6:49-54. [PMID: 23946776 PMCID: PMC3742507 DOI: 10.3892/ol.2013.1318] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Accepted: 04/22/2013] [Indexed: 01/15/2023] Open
Abstract
Ovarian cancer is one of the most lethal gynaecological cancers worldwide. However, the mechanisms underlying ovarian carcinogenesis are not well understood. The present study used immunostaining, western blotting and quantitative real-time PCR to demonstrate that ZNF268 is overexpressed in human ovarian carcinomas. ZNF268-knockdown increased the viability, colony formation and growth of in vivo xenografts of ovarian carcinoma SKOV-3 cells, whereas SKOV-3 cell migration was inhibited. Furthermore, it was demonstrated that the knockdown of ZNF268 may increase SKOV-3 cell growth by promoting cell cycle progression. The findings suggest that ZNF268 is a novel protein involved in ovarian carcinogenesis and that it may aid in the understanding of the mechanisms of ovarian carcinogenesis.
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Affiliation(s)
- Li Hu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, Hubei 430072
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Wang W, Guo M, Hu L, Cai J, Zeng Y, Luo J, Shu Z, Li W, Huang Z. The zinc finger protein ZNF268 is overexpressed in human cervical cancer and contributes to tumorigenesis via enhancing NF-κB signaling. J Biol Chem 2012; 287:42856-66. [PMID: 23091055 DOI: 10.1074/jbc.m112.399923] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Cervical cancer is one of the most common tumors affecting women's health worldwide. Although human papillomavirus can be detected in nearly all cases, the mechanism of cervical carcinogenesis remains to be further addressed. Here, we demonstrated that ZNF268, a Krüppel-associated box-containing zinc finger protein, might contribute to the development of cervical cancer. We found that ZNF268b2, an isoform of ZNF268, was overexpressed in human squamous cervical cancer specimens. Knockdown of ZNF268 in cervical cancer cells caused cell cycle arrest at the G(0)/G(1) phase, reduced colony formation, and increased sensitivity to TNFα-induced apoptosis. In addition, HeLa cell growth in xenograft nude mice was suppressed by ZNF268 knockdown, with increased apoptosis. Furthermore, ZNF268b2 was shown to increase NF-κB signaling in vitro and in vivo. Reconstitution of NF-κB activity restored proliferation in ZNF268 knockdown HeLa cells. Of note, we observed a high frequency of NF-κB activation in ZNF268-overexpressing cervical cancer tissues, suggesting a pathological coincidence of ZNF268b2 overexpression and NF-κB activation. Taken together, our results reveal a novel role of ZNF268b2 that contributes to cervical carcinogenesis in part through enhancing NF-κB signaling.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Virology, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430072, China
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The ACE2 gene: its potential as a functional candidate for cardiovascular disease. Clin Sci (Lond) 2012; 124:65-76. [DOI: 10.1042/cs20120269] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The RAS (renin–angiotensin system) plays an important role in the pathophysiology of CVD (cardiovascular disease), and RAS blockade is an important therapeutic strategy in the management of CVD. A new counterbalancing arm of the RAS is now known to exist in which ACE (angiotensin-converting enzyme) 2 degrades Ang (angiotensin) II, the main effector of the classic RAS, and generates Ang-(1–7). Altered ACE2 expression is associated with cardiac and vascular disease in experimental models of CVD, and ACE2 is increased in failing human hearts and atherosclerotic vessels. In man, circulating ACE2 activity increases with coronary heart disease, as well as heart failure, and a large proportion of the variation in plasma ACE2 levels has been attributed to hereditary factors. The ACE2 gene maps to chromosome Xp22 and this paper reviews the evidence associating ACE2 gene variation with CVD and considers clues to potential functional ACE2 variants that may alter gene expression or transcriptional activity. Studies to date have investigated ACE2 gene associations in hypertension, left ventricular hypertrophy and coronary artery disease, but the results have been inconsistent. The discrepancies may reflect the sample size of the studies, the gender or ethnicity of subjects, the cardiovascular phenotype or the ACE2 SNP investigated. The frequent observation of apparent sex-dependence might be of special importance, if confirmed. As yet, there are no studies to concurrently assess ACE2 gene polymorphisms and circulating ACE2 activity. Large-scale carefully conducted clinical studies are urgently needed to clarify more precisely the potential role of ACE2 in the CVD continuum.
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