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Cohen E, Johnson CN, Wasikowski R, Billi AC, Tsoi LC, Kahlenberg JM, Gudjonsson JE, Coulombe PA. Significance of stress keratin expression in normal and diseased epithelia. iScience 2024; 27:108805. [PMID: 38299111 PMCID: PMC10828818 DOI: 10.1016/j.isci.2024.108805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/30/2023] [Accepted: 01/02/2024] [Indexed: 02/02/2024] Open
Abstract
A group of keratin intermediate filament genes, the type II KRT6A-C and type I KRT16 and KRT17, are deemed stress responsive as they are induced in keratinocytes of surface epithelia in response to environmental stressors, in skin disorders (e.g., psoriasis) and in carcinomas. Monitoring stress keratins is widely used to identify keratinocytes in an activated state. Here, we analyze single-cell transcriptomic data from healthy and diseased human skin to explore the properties of stress keratins. Relative to keratins occurring in healthy skin, stress-induced keratins are expressed at lower levels and show lesser type I-type II pairwise regulation. Stress keratins do not "replace" the keratins expressed during normal differentiation nor reflect cellular proliferation. Instead, stress keratins are consistently co-regulated with genes with roles in differentiation, inflammation, and/or activation of innate immunity at the single-cell level. These findings provide a roadmap toward explaining the broad diversity and contextual regulation of keratins.
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Affiliation(s)
- Erez Cohen
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Craig N. Johnson
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Rachael Wasikowski
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Allison C. Billi
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Lam C. Tsoi
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - J. Michelle Kahlenberg
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI, USA
- Division of Rheumatology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Johann E. Gudjonsson
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI, USA
- Division of Rheumatology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Pierre A. Coulombe
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, USA
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI, USA
- Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI, USA
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2
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Yasir M, Park J, Chun W. EWS/FLI1 Characterization, Activation, Repression, Target Genes and Therapeutic Opportunities in Ewing Sarcoma. Int J Mol Sci 2023; 24:15173. [PMID: 37894854 PMCID: PMC10607184 DOI: 10.3390/ijms242015173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023] Open
Abstract
Despite their clonal origins, tumors eventually develop into complex communities made up of phenotypically different cell subpopulations, according to mounting evidence. Tumor cell-intrinsic programming and signals from geographically and temporally changing microenvironments both contribute to this variability. Furthermore, the mutational load is typically lacking in childhood malignancies of adult cancers, and they still exhibit high cellular heterogeneity levels largely mediated by epigenetic mechanisms. Ewing sarcomas represent highly aggressive malignancies affecting both bone and soft tissue, primarily afflicting adolescents. Unfortunately, the outlook for patients facing relapsed or metastatic disease is grim. These tumors are primarily fueled by a distinctive fusion event involving an FET protein and an ETS family transcription factor, with the most prevalent fusion being EWS/FLI1. Despite originating from a common driver mutation, Ewing sarcoma cells display significant variations in transcriptional activity, both within and among tumors. Recent research has pinpointed distinct fusion protein activities as a principal source of this heterogeneity, resulting in markedly diverse cellular phenotypes. In this review, we aim to characterize the role of the EWS/FLI fusion protein in Ewing sarcoma by exploring its general mechanism of activation and elucidating its implications for tumor heterogeneity. Additionally, we delve into potential therapeutic opportunities to target this aberrant fusion protein in the context of Ewing sarcoma treatment.
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Affiliation(s)
| | | | - Wanjoo Chun
- Department of Pharmacology, Kangwon National University School of Medicine, Chuncheon 24341, Republic of Korea; (M.Y.); (J.P.)
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Meng F, Dai L. Transcription factors TP63 facilitates malignant progression of thyroid cancer by upregulating KRT17 expression and inducing epithelial-mesenchymal transition. Growth Factors 2023:1-11. [PMID: 36919456 DOI: 10.1080/08977194.2023.2184656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Thyroid cancer (TC) is a relatively prevalent endocrine tumor among women, the incidence of which is rapidly rising. In this present study, we aimed to provide new therapeutic targets from the aspect of transcription factor-target gene interaction. TP63 and KRT17 were both highly expressed in TC tissues and cells. The results of ChIP and dual-luciferase assays confirmed TP63 to bind the KRT17 promoter. Cell function assays revealed that knockdown of TP63 could repress TC cell progression. Furthermore, the rescue assay verified that TP63 could facilitate KRT17 expression to activate the AKT signaling pathway, which in turn stimulated TC cell invasion and migration, and induced EMT. All these results verified that TP63 facilitates TC malignant progression by promoting KRT17 expression and inducing EMT.
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Affiliation(s)
- Fanbo Meng
- Department of Breast and Thyroid Surgery, the Affiliated Hospital of Shaoxing University, Shaoxing, China
| | - Liting Dai
- Medical Examination Center, the Affiliated Hospital of Shaoxing University, Shaoxing, China
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LncRNA NR120519 Blocks KRT17 to Promote Cell Proliferation and Migration in Hypopharyngeal Squamous Carcinoma. Cancers (Basel) 2023; 15:cancers15030603. [PMID: 36765563 PMCID: PMC9913485 DOI: 10.3390/cancers15030603] [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: 11/06/2022] [Revised: 01/10/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Hypopharyngeal carcinoma is the worst type of head and neck squamous cell carcinoma. It is necessary to identify the key molecular targets related to the carcinogenesis and development of hypopharyngeal carcinoma. METHODS Differentially expressed lncRNAs in hypopharyngeal carcinoma were selected by microarray, and lncRNA-associated proteins were found by RIP assay. Colony formation, CCK-8, wound healing and Transwell assays were performed to detect the effects of lncRNA and its associated protein on cell proliferation and migration in vitro. Downstream pathways of lncRNA and its associated protein were detected by WB. Through a subcutaneous tumor model, the effects of lncRNA and its associated protein on cell proliferation were detected. The expressions of lncRNA and its associated protein in hypopharyngeal cancer tissues were detected by qRT-PCR and immunohistochemistry assays, respectively, and survival analyses were performed by Kaplan-Meier curve. RESULTS A total of 542 and 265 lncRNAs were upregulated and downregulated in microarrays, respectively. LncRNA NR120519 was upregulated and promoted cell proliferation and migration of hypopharyngeal carcinoma in vitro and cell proliferation in vivo. RIP and WB assays showed that KRT17 was associated with and blocked by NR120519.The silencing of KRT17 promoted cell proliferation and the migration of hypopharyngeal carcinoma in vitro and cell proliferation in vivo by activating the AKT/mTOR pathway and epithelial-mesenchymal transformation (EMT). Finally, the NR120519 high expression and KRT17 low expression groups showed shorter overall survival. CONCLUSION NR120519 activated the AKT/mTOR pathway and EMT by blocking KRT17 to promote cell proliferation and the migration of hypopharyngeal carcinoma.
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Duan C, Townley H. Exploitation of High Tumour GSH Levels for Targeted siRNA Delivery in Rhabdomyosarcoma Cells. Biomolecules 2022; 12:biom12081129. [PMID: 36009022 PMCID: PMC9405954 DOI: 10.3390/biom12081129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/09/2022] [Accepted: 08/15/2022] [Indexed: 11/16/2022] Open
Abstract
Metastatic alveolar rhabdomyosarcoma (aRMS) is an aggressive paediatric cancer with a poor prognosis. Downregulation of critical tumour genes using targeted siRNA remains an obstacle, but association with nanoparticles could help to deliver, protect, target, and enhance penetration. siRNA towards two genes was investigated: (i) Human αB-crystallin (CRYAB) and Heat Shock Protein Family B (Small) Member 2 (HSPB2), and (ii) Keratin 17 (KRT17). A mesoporous silica based nanosystem was linked to siRNA via disulfide bonds and loaded with IR820 dye. Transfection efficiency and signalling was evaluated, and the metabolic effects and cell proliferation were monitored in 2D culture and 3D spheroid models. The bound siRNA was protected from degradation with RNase I for at least 24 h. The delivered siRNA showed significant suppression of viability; 53.21 ± 23.40% for CRYAB and HSPB2 siRNA, and 88.06 ± 17.28% for KRT17 siRNA. After 72 h this increased to >50% cell apoptosis and necrosis. Intracellular total glutathione (GSH) levels were also compared with fibroblasts, and the RMS cell lines showed a several-fold increase. IR820 cellular uptake rate and penetration depth was significantly improved by nanoparticle delivery. Targetted siRNA delivery may pave the way for less invasive and more effective treatments of aRMS.
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Affiliation(s)
- Chengchen Duan
- Nuffield Department of Women’s and Reproductive Health, Oxford University John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
| | - Helen Townley
- Nuffield Department of Women’s and Reproductive Health, Oxford University John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
- Department of Engineering Science, Oxford University, Parks Road, Oxford OX1 3PJ, UK
- Correspondence: ; Tel.: +44-1865-283792
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Chen J, Ge SJ, Feng HJ, Wu SZ, Ji R, Huang WR, Huang W, Lu CH. KRT17 Promotes the Activation of HSCs via EMT in Liver Fibrosis. J Clin Transl Hepatol 2022; 10:207-218. [PMID: 35528988 PMCID: PMC9039702 DOI: 10.14218/jcth.2021.00101] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 05/19/2021] [Accepted: 06/06/2021] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND AND AIMS Although activation of hepatic stellate cells (HSCs) plays a central role in the development of liver fibrosis, the mechanism underlying the activation of HSCs remains unclear. Keratin 17 (KRT17), a member of the intermediate filament family, can regulate tumor cell proliferation and migration. The current study aimed to elucidate the role of KRT17 in the activation of HSCs and the mechanisms underlying liver fibrosis. METHODS The expression of KRT17 was determined using immunohistochemistry in tissue microarray. Western blotting and qRT-PCR assays were used to determine the KRT17 expression in fibrotic liver tissues obtained from human subjects and mice. LX-2 cells were treated with TGF-β1 recombinant protein and adipocyte differentiation mixture (MDI) mix to induce and reverse LX-2 cell activation, respectively, in order to explore the correlation between KRT17 and HSC activation. Additionally, cell proliferation and migration abilities of LX-2 cells transfected with KRT17-overexpressing plasmid or small interfering RNA were determined using CCK-8, flow cytometry, Transwell, and wound healing assays. Finally, rescue assay was used to explore the role of KRT17 in HSC activation and epithelial-mesenchymal transition (EMT). RESULTS The expression of KRT17 was higher in the human and mouse fibrotic liver tissues than in healthy liver tissues, and it was positively correlated with HSC activation. Upregulated KRT17 enhanced proliferation, migration, HSC activation and EMT in LX-2 cells, while knockdown of KRT17 reversed these effects. TGF-β1 recombinant protein accelerated KRT17-mediated EMT, HSC activation and proliferation, while TGF-β1 inhibitor counteracted the effect of KRT17 in vitro. CONCLUSIONS KRT17 promoted HSC activation, proliferation and EMT in hepatic fibrosis probably via TGF-β1 signaling, and KRT17 might serve as a therapeutic target for the treatment of liver fibrosis.
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Affiliation(s)
- Jing Chen
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China
- Research Center of Clinical Medicine, Nantong University, Affiliated Hospital of Nantong University, Nantong, China
| | - Si-Jia Ge
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China
- Research Center of Clinical Medicine, Nantong University, Affiliated Hospital of Nantong University, Nantong, China
| | - Hai-Juan Feng
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China
- Research Center of Clinical Medicine, Nantong University, Affiliated Hospital of Nantong University, Nantong, China
| | - Shu-Zhen Wu
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China
- Research Center of Clinical Medicine, Nantong University, Affiliated Hospital of Nantong University, Nantong, China
| | - Ran Ji
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China
- Research Center of Clinical Medicine, Nantong University, Affiliated Hospital of Nantong University, Nantong, China
| | - Wei-Rong Huang
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China
- Research Center of Clinical Medicine, Nantong University, Affiliated Hospital of Nantong University, Nantong, China
| | - Wei Huang
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China
- Correspondence to: Wei Huang and Cui-Hua Lu, Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China. ORCID: https://orcid.org/0000-0001-8471-530X (WH), https://orcid.org/0000-0002-1377-5820 (CHL). Tel: +86-13962991839 (WH), +86-13962801685 (CHL), Fax: +86-513-8116-1826, E-mail: (WH), (CHL)
| | - Cui-Hua Lu
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China
- Correspondence to: Wei Huang and Cui-Hua Lu, Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, China. ORCID: https://orcid.org/0000-0001-8471-530X (WH), https://orcid.org/0000-0002-1377-5820 (CHL). Tel: +86-13962991839 (WH), +86-13962801685 (CHL), Fax: +86-513-8116-1826, E-mail: (WH), (CHL)
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Deng S, Leong HC, Datta A, Gopal V, Kumar AP, Yap CT. PI3K/AKT Signaling Tips the Balance of Cytoskeletal Forces for Cancer Progression. Cancers (Basel) 2022; 14:1652. [PMID: 35406424 PMCID: PMC8997157 DOI: 10.3390/cancers14071652] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/13/2022] [Accepted: 03/21/2022] [Indexed: 02/01/2023] Open
Abstract
The PI3K/AKT signaling pathway plays essential roles in multiple cellular processes, which include cell growth, survival, metabolism, and motility. In response to internal and external stimuli, the PI3K/AKT signaling pathway co-opts other signaling pathways, cellular components, and cytoskeletal proteins to reshape individual cells. The cytoskeletal network comprises three main components, which are namely the microfilaments, microtubules, and intermediate filaments. Collectively, they are essential for many fundamental structures and cellular processes. In cancer, aberrant activation of the PI3K/AKT signaling cascade and alteration of cytoskeletal structures have been observed to be highly prevalent, and eventually contribute to many cancer hallmarks. Due to their critical roles in tumor progression, pharmacological agents targeting PI3K/AKT, along with cytoskeletal components, have been developed for better intervention strategies against cancer. In our review, we first discuss existing evidence in-depth and then build on recent advances to propose new directions for therapeutic intervention.
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Affiliation(s)
- Shuo Deng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (S.D.); (V.G.)
- NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore;
| | - Hin Chong Leong
- NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore;
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore;
- Departments of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore
| | - Arpita Datta
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore;
| | - Vennila Gopal
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (S.D.); (V.G.)
| | - Alan Prem Kumar
- NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore;
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore;
- Departments of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore
- National University Cancer Institute, National University Health System, Singapore 119074, Singapore
| | - Celestial T. Yap
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (S.D.); (V.G.)
- NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore;
- National University Cancer Institute, National University Health System, Singapore 119074, Singapore
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Zhang H, Zhang Y, Xia T, Lu L, Luo M, Chen Y, Liu Y, Li Y. The Role of Keratin17 in Human Tumours. Front Cell Dev Biol 2022; 10:818416. [PMID: 35281081 PMCID: PMC8912659 DOI: 10.3389/fcell.2022.818416] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 02/03/2022] [Indexed: 12/24/2022] Open
Abstract
Keratins are a group of proteins that can constitute intermediate fibers. It is a component of the cytoskeleton and plays an important role in cell protection and structural support. Keratin 17, a Type I keratin, is a multifunctional protein that regulates a variety of biological processes, including cell growth, proliferation, migration, apoptosis and signal transduction. Abnormal expression of KRT17 is associated with a variety of diseases, such as skin diseases. In recent years, studies have shown that KRT17 is abnormally expressed in a variety of malignant tumours, such as lung cancer, cervical cancer, oral squamous cell carcinoma and sarcoma. These abnormal expressions are related to the occurrence, development and prognosis of malignant tumors. In this review, we summarized the expression patterns of KRT17 in a variety of malignant tumours, the role of KRT17 in the development and prognosis of different malignant tumors and its molecular mechanisms. We also discuss the potential clinical application of KRT17 as a valuable therapeutic target.
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Affiliation(s)
- Hanqun Zhang
- Department of Oncology, Guizhou Provincial People’s Hospital, Guizhou, China
| | - Yun Zhang
- Department of Pathology, Guizhou Provincial People’s Hospital, Guizhou, China
| | - Tingting Xia
- Department of Nephrology, Guizhou Provincial People’s Hospital, Guizhou, China
| | - Liang Lu
- Department of Oncology, Guizhou Provincial People’s Hospital, Guizhou, China
| | - Min Luo
- Department of Oncology, Guizhou Provincial People’s Hospital, Guizhou, China
| | - Yanping Chen
- Department of Oncology, Guizhou Provincial People’s Hospital, Guizhou, China
| | - Yuncong Liu
- Department of Oncology, Guizhou Provincial People’s Hospital, Guizhou, China
- *Correspondence: Yuncong Liu, ; Yong Li,
| | - Yong Li
- Department of Oncology, Guizhou Provincial People’s Hospital, Guizhou, China
- *Correspondence: Yuncong Liu, ; Yong Li,
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Baraks G, Tseng R, Pan CH, Kasliwal S, Leiton CV, Shroyer KR, Escobar-Hoyos LF. Dissecting the Oncogenic Roles of Keratin 17 in the Hallmarks of Cancer. Cancer Res 2021; 82:1159-1166. [PMID: 34921015 PMCID: PMC9016724 DOI: 10.1158/0008-5472.can-21-2522] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 11/08/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022]
Affiliation(s)
- Gabriella Baraks
- Undergraduate Program in Biomedical Engineering, Stony Brook University, Stony Brook, New York
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
| | - Robert Tseng
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
| | - Chun-Hao Pan
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
- Molecular and Cellular Biology Graduate Program, Stony Brook University, New York
| | - Saumya Kasliwal
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
| | - Cindy V. Leiton
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
| | - Kenneth R. Shroyer
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
- Corresponding Authors: Kenneth R. Shroyer, Pathology, Stony Brook University, 101 Nicolls Rd, Stony Brook, NY 11794. Phone: 631-444-3000; E-mail: Kenneth.; and Luisa F. Escobar-Hoyos, 15 York Street PO Box 208040, New Haven, CT 06513. Phone: 203-737-2003; E-mail:
| | - Luisa F. Escobar-Hoyos
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
- Department of Therapeutic Radiology and Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut
- Corresponding Authors: Kenneth R. Shroyer, Pathology, Stony Brook University, 101 Nicolls Rd, Stony Brook, NY 11794. Phone: 631-444-3000; E-mail: Kenneth.; and Luisa F. Escobar-Hoyos, 15 York Street PO Box 208040, New Haven, CT 06513. Phone: 203-737-2003; E-mail:
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The role of KRT17 in colorectal cancer. Aging (Albany NY) 2021; 13:19950-19951. [PMID: 34435972 PMCID: PMC8436917 DOI: 10.18632/aging.203471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 08/10/2021] [Indexed: 12/03/2022]
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Zeng Y, Zou M, Liu Y, Que K, Wang Y, Liu C, Gong J, You Y. Keratin 17 Suppresses Cell Proliferation and Epithelial-Mesenchymal Transition in Pancreatic Cancer. Front Med (Lausanne) 2020; 7:572494. [PMID: 33324659 PMCID: PMC7726264 DOI: 10.3389/fmed.2020.572494] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 10/28/2020] [Indexed: 02/05/2023] Open
Abstract
Keratin 17 (K17), a member of type I acidic epithelial keratin family, has been reported to be upregulated in many malignant tumors and to be involved in promoting the development of tumors. However, the precise role of K17 in progression of pancreatic cancer is still unknown. In this study, we found that K17 expression was highly expressed in pancreatic cancer tissues and cell lines and that upregulated expression was associated with the pathological grade and poor prognosis. K17 expression served as an independent predictor of pancreatic cancer survival. Meanwhile, we showed that knocking down K17 induced pancreatic cancer cell proliferation, colony formation and tumor growth in xenografts in mice. However, K17 upregulation inhibited pancreatic cancer cell proliferation and colony formation. Further mechanistic study revealed that K17 knockdown promoted cell cycle progression by upregulating CyclinD1 expression and repressed cell apoptosis. However, K17 upregulation suppressed cell cycle progression by decreasing CyclinD1 expression, and induced apoptosis by increasing the levels of cleaved Caspase3. In addition, K17 knockdown promoted pancreatic cancer cell migration and invasion, but K17 upregulation suppressed cell migration and invasion. Moreover, knocking down K17 promoted epithelial-mesenchymal transition (EMT) in pancreatic cancer cell by inhibiting E-cadherin expression and inducing Vimentin expression, and the effects of K17 upregulation were opposite to that of K17downregulation. Taken together, our findings suggest that K17 functions as a potential tumor suppressor, even though it is upregulated in pancreatic cancer.
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Affiliation(s)
- Yong Zeng
- Department of Emergency, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Min Zou
- Department of Gastroenterology, West China Hospital of Sichuan University, Sichuan, China
| | - Yan Liu
- Department of Gastroenterology, The Fifth People's Hospital of Chengdu, Chengdu, China
| | - Keting Que
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yunbing Wang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Changan Liu
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jianpin Gong
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yu You
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Abstract
Simple Summary Cell migration is an essential process from embryogenesis to cell death. This is tightly regulated by numerous proteins that help in proper functioning of the cell. In diseases like cancer, this process is deregulated and helps in the dissemination of tumor cells from the primary site to secondary sites initiating the process of metastasis. For metastasis to be efficient, cytoskeletal components like actin, myosin, and intermediate filaments and their associated proteins should co-ordinate in an orderly fashion leading to the formation of many cellular protrusions-like lamellipodia and filopodia and invadopodia. Knowledge of this process is the key to control metastasis of cancer cells that leads to death in 90% of the patients. The focus of this review is giving an overall understanding of these process, concentrating on the changes in protein association and regulation and how the tumor cells use it to their advantage. Since the expression of cytoskeletal proteins can be directly related to the degree of malignancy, knowledge about these proteins will provide powerful tools to improve both cancer prognosis and treatment. Abstract Successful metastasis depends on cell invasion, migration, host immune escape, extravasation, and angiogenesis. The process of cell invasion and migration relies on the dynamic changes taking place in the cytoskeletal components; actin, tubulin and intermediate filaments. This is possible due to the plasticity of the cytoskeleton and coordinated action of all the three, is crucial for the process of metastasis from the primary site. Changes in cellular architecture by internal clues will affect the cell functions leading to the formation of different protrusions like lamellipodia, filopodia, and invadopodia that help in cell migration eventually leading to metastasis, which is life threatening than the formation of neoplasms. Understanding the signaling mechanisms involved, will give a better insight of the changes during metastasis, which will eventually help targeting proteins for treatment resulting in reduced mortality and longer survival.
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Ochoa S, de Anda-Jáuregui G, Hernández-Lemus E. Multi-Omic Regulation of the PAM50 Gene Signature in Breast Cancer Molecular Subtypes. Front Oncol 2020; 10:845. [PMID: 32528899 PMCID: PMC7259379 DOI: 10.3389/fonc.2020.00845] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 04/29/2020] [Indexed: 12/24/2022] Open
Abstract
Breast cancer is a disease that exhibits heterogeneity that goes from the genomic to the clinical levels. This heterogeneity is thought to be captured (at least partially) by the so-called breast cancer molecular subtypes. These molecular subtypes were initially defined based on the unsupervised clustering of gene expression and its correlate with histological, morphological, phenotypic and clinical features already known. Later, a 50-gene signature, PAM50, was defined in order to identify the biological subtype of a given sample within the clinical setting. The PAM50 signature was obtained by the use of unsupervised statistical methods, and therefore no limitation was set on the biological relevance (or lack of) of the selected genes beyond its predictive capacity. An open question that remains is what are the regulatory elements that drive the various expression behaviors of this set of genes in the different molecular subtypes. This question becomes more relevant as the measurement of more biological layers of regulation becomes accessible. In this work, we analyzed the gene expression regulation of the 50 genes in the PAM50 signature, in terms of (a) gene co-expression, (b) transcription factors, (c) micro-RNAs, and (d) methylation. Using data from the Cancer Genome Atlas (TCGA) for the Luminal A and B, Basal, and HER2-enriched molecular subtypes as well as normal tumor adjacent tissue, we identified predictors for gene expression through the use of an elastic net model. We compare and contrast the sets of identified regulators for the gene signature in each molecular subtype, and systematically compare them to current literature. We also identified a unique set of predictors for the expression of genes in the PAM50 signature associated with each of the molecular subtypes. Most selected predictors are exclusive for a PAM50 gene and predictors are not shared across subtypes. There are only 13 coding transcripts and 2 miRNAs selected for the four subtypes. MiR-21 and miR-10b connect almost all the PAM50 genes in all the subtypes and normal tissue, but do it in an exclusive manner, suggesting a cancer switch from miR-10b coordination in normal tissue to miR-21. The PAM50 gene sets of selected predictors that enrich for a function across subtypes, support that different regulatory molecular mechanisms are taking place. With this study we aim to a wider understanding of the regulatory mechanisms that differentiate the expression of the PAM50 signature, which in turn could perhaps help understand the molecular basis of the differences between the molecular subtypes.
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Affiliation(s)
- Soledad Ochoa
- Computational Genomics Division, National Institute of Genomic Medicine, Mexico City, Mexico.,Graduate Program in Biomedical Sciences, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Guillermo de Anda-Jáuregui
- Computational Genomics Division, National Institute of Genomic Medicine, Mexico City, Mexico.,Cátedras Conacyt para Jóvenes Investigadores', National Council on Science and Technology, Mexico City, Mexico
| | - Enrique Hernández-Lemus
- Computational Genomics Division, National Institute of Genomic Medicine, Mexico City, Mexico.,Center for Complexity Sciences, Universidad Nacional Autónoma de México, Mexico City, Mexico
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14
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Yan X, Yang C, Hu W, Chen T, Wang Q, Pan F, Qiu B, Tang B. Knockdown of KRT17 decreases osteosarcoma cell proliferation and the Warburg effect via the AKT/mTOR/HIF1α pathway. Oncol Rep 2020; 44:103-114. [PMID: 32627037 PMCID: PMC7251737 DOI: 10.3892/or.2020.7611] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 04/14/2020] [Indexed: 02/06/2023] Open
Abstract
Keratins are fibrous structural proteins that serve essential roles in forming the stratum corneum and protect the cells in this layer of skin from damage. Keratin 17 (KRT17) is a key member of the keratins, and dysregulated expression of KRT17 has been reported in various types of cancer, such as lung and gastric cancer. The present study aimed to identify the role of KRT17 in osteosarcoma and the underlying molecular mechanism. The expression of KRT17 in osteosarcoma tissues and cell lines was detected using reverse transcription‑quantitative PCR (RT‑qPCR) and western blotting. The effects of KRT17 on osteosarcoma cell proliferation and the Warburg effect in vitro were detected using CCK‑8 and colony formation assays, cell cycle distribution analysis and metabolic measures. The effects of KRT17 on osteosarcoma cell proliferation in vivo were detected using a subcutaneous tumorigenesis model. The association between KRT17 and the AKT/mTOR/hypoxia‑inducible factor 1α (HIF1α) pathway was detected using RT‑qPCR and western blotting. The results demonstrated that KRT17 was highly expressed in osteosarcoma tissues and cell lines. Knockdown of KRT17 decreased osteosarcoma cell proliferation and colony formation, induced G1 phase arrest and inhibited glycolysis in vitro. Similarly, the suppression of KRT17 decreased osteosarcoma tumor growth in vivo. Knockdown of KRT17 decreased the expression of phosphorylated (p)‑AKT, p‑mTOR, HIF1α and the target gene of HIF1α glucose transporter 1. Restoring the expression of p‑AKT, p‑mTOR or HIF1α reversed the effect of KRT17 inhibition on cell proliferation and glycolysis. These results indicated that knockdown of KRT17 may be an effective method for treating osteosarcoma through inhibiting osteosarcoma cell proliferation and the Warburg effect by suppressing the AKT/mTOR/HIF1α pathway.
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Affiliation(s)
- Xianke Yan
- Department of Orthopedics, Guizhou Provincial Orthopedics Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Chao Yang
- Department of Orthopedics, Guizhou Provincial Orthopedics Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Wei Hu
- Department of Orthopedics, Guizhou Provincial Orthopedics Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Tao Chen
- Department of Orthopedics, Guizhou Provincial Orthopedics Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Qi Wang
- Department of Orthopedics, Guizhou Provincial Orthopedics Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Feng Pan
- Department of Orthopedics, Guizhou Provincial Orthopedics Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Bing Qiu
- Department of Orthopedics, Guizhou Provincial Orthopedics Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Bensen Tang
- Department of Orthopedics, Guizhou Provincial Orthopedics Hospital, Guiyang, Guizhou 550000, P.R. China
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15
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Cytokeratin 5 alters β-catenin dynamics in breast cancer cells. Oncogene 2020; 39:2478-2492. [PMID: 31988452 PMCID: PMC7085458 DOI: 10.1038/s41388-020-1164-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 12/26/2019] [Accepted: 01/15/2020] [Indexed: 12/13/2022]
Abstract
Estrogen receptor (ER) positive breast cancers often contain subpopulations of cells that express the intermediate filament protein cytokeratin 5 (CK5). CK5+ cells are enriched in cancer stem cell (CSC) properties, can be induced by progestins, and predict poor prognosis in ER+ breast cancer. We established through CK5 knockout and overexpression in ER+ breast cancer cell lines that CK5 is important for tumorsphere formation, prompting us to speculate that CK5 has regulatory activity in CSCs. To interrogate CK5 interacting proteins that may be functionally cooperative, we performed immunoprecipitation-mass spectrometry for CK5 in ER+ breast cancer cells. Focusing on proteins with signaling activity, we identified β-catenin, a key transcription factor of the Wnt signaling pathway and cell adhesion molecule, as a CK5 interactor, which we confirmed by co-immunoprecipitation in several breast cancer models. We interrogated the dual functions of β-catenin in relation to CK5. Knockout or knockdown of CK5 ablated β-catenin transcriptional activity in response to progestins and Wnt stimuli. Conversely, CK5 induced by progestins or overexpression was sufficient to promote loss of β-catenin at the cell membrane and total E-cadherin loss. A breast cancer patient-derived xenograft showed similar loss of membrane β-catenin and E-cadherin in CK5+ but not intratumoral CK5− cells and single cell RNA sequencing found the top enriched pathways in the CK5+ cell cluster were cell junction remodeling and signaling. This report highlights that CK5 actively remodels cell morphology and that blockade of CK5-β-catenin interaction may reverse the detrimental properties of CK5+ breast cancer cells.
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16
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Bai JDK, Babu S, Roa-Peña L, Hou W, Akalin A, Escobar-Hoyos LF, Shroyer KR. Keratin 17 is a negative prognostic biomarker in high-grade endometrial carcinomas. Hum Pathol 2019; 94:40-50. [DOI: 10.1016/j.humpath.2019.09.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/04/2019] [Accepted: 09/06/2019] [Indexed: 12/19/2022]
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17
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Liu Z, Yu S, Ye S, Shen Z, Gao L, Han Z, Zhang P, Luo F, Chen S, Kang M. Keratin 17 activates AKT signalling and induces epithelial-mesenchymal transition in oesophageal squamous cell carcinoma. J Proteomics 2019; 211:103557. [PMID: 31669361 DOI: 10.1016/j.jprot.2019.103557] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/18/2019] [Accepted: 10/17/2019] [Indexed: 12/24/2022]
Abstract
Oesophageal squamous cell carcinoma (ESCC) is an aggressive malignancy and a leading cause of cancer-related death worldwide. Lack of effective early diagnosis strategies and ensuing complications from tumour metastasis account for the majority of ESCC death. Thus, identification of key molecular targets involved in ESCC carcinogenesis and progression is crucial for ESCC prognosis. In this study, four pairs of ESCC tissues were used for mRNA sequencing to determine differentially expressed genes (DEGs). 347 genes were found to be upregulated whereas 255 genes downregulated. By screening DEGs plus bioinformatics analyses such as KEGG, PPI and IPA, we found that there were independent interactions between KRT family members. KRT17 upregulation was confirmed in ESCC and its relationship with clinicopathological features were analysed. KRT17 was significantly associated with ESCC histological grade, lymph node and distant metastasis, TNM stage and five-year survival rate. Upregulation of KRT17 promoted ESCC cell growth, migration, and lung metastasis. Mechanistically, we found that KRT17-promoted ESCC cell growth and migration was accompanied by activation of AKT signalling and induction of EMT. These findings suggested that KRT17 is significantly related to malignant progression and poor prognosis of ESCC patients, and it may serve as a new biological target for ESCC therapy. SIGNIFICANCE: Oesophageal cancer is one of the leading causes of cancer mortality worldwide and oesophageal squamous cell carcinoma (ESCC) is the major histological type of oesophageal cancer in Eastern Asia. However, the molecular basis for the development and progression of ESCC remains largely unknown. In this study, RNA sequencing was used to establish the whole-transcriptome profile in ESCC tissues versus the adjacent non-cancer tissues and the results were bioinformatically analysed to predict the roles of the identified differentially expressed genes. We found that upregulation of KRT17 was significantly associated with advanced clinical stage, lymph node and distant metastasis, TNM stage and poor clinical outcome. Keratin 17 (KRT17) upregulation in ESCC cells not only promoted cell proliferation but also increased invasion and metastasis accompanied with AKT activation and epithelial-mesenchymal transition (EMT). These data suggested that KRT17 played an important role in ESCC development and progression and may serve as a prognostic biomarker and therapeutic target in ESCC.
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Affiliation(s)
- Zhun Liu
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Shaobin Yu
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Shuting Ye
- Key Laboratory of Gastrointestinal Cancer, Fujian Medical University, Ministry of Education, Fuzhou 350122, China
| | - Zhimin Shen
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Lei Gao
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Ziyang Han
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Peipei Zhang
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Fei Luo
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Sui Chen
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China.
| | - Mingqiang Kang
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China; Key Laboratory of Gastrointestinal Cancer, Fujian Medical University, Ministry of Education, Fuzhou 350122, China; Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350122, China.
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18
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Dong M, Dong Z, Zhu X, Zhang Y, Song L. Long non-coding RNA MIR205HG regulates KRT17 and tumor processes in cervical cancer via interaction with SRSF1. Exp Mol Pathol 2019; 111:104322. [PMID: 31655037 DOI: 10.1016/j.yexmp.2019.104322] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/09/2019] [Accepted: 10/17/2019] [Indexed: 12/17/2022]
Abstract
Abnormal expression of long non-coding RNAs (lncRNAs) has been demonstrated to be a vital regulatory factor in a large number of malignancies. The investigation in cervical cancer and the associated modulation mechanisms are yet to be probed. The aim of this study is to specifically investigate the expression pattern and modulatory mechanism of MIR205HG in cervical cancer. Our paper firstly revealed the up-regulation of KRT17 in cervical cancer. Function assays further displayed that KRT17 silencing impaired the proliferation and migration, and activated the apoptosis of cervical cancer cells. Based on the finding that MIR205HG could regulate KRT17 expression, we further probed the detailed mechanism between MIR205HG and KRT17. It was observed from mechanism experiments that MIR205HG depleted SRSF1 to increase KRT17 expression. The whole mechanism of MIR205HG/SRSF1/KRT17 axis affecting cell proliferation, apoptosis and migration in cervical cancer was validated using rescue assays. In conclusion, MIR205HG modulated the biological activities of cervical cancer cells via targeting SRSF1 and regulating KRT17, which better understood the pathogenesis of cervical carcinoma and excavated a novel therapeutic target.
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Affiliation(s)
- Mingli Dong
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
| | - Zhennan Dong
- Department of Medical Laboratory, Chinese PLA General Hospital, Beijing 100853, China
| | - Xinyu Zhu
- Department of Obstetrics and Gynecology, Beijing Corps Hospital of Chinese People's Armed Police Force, Beijing 100027, China
| | - Yunhe Zhang
- Department of Obstetrics and Gynecology, China Mei-tan General Hospital, Beijing 100028, China
| | - Lei Song
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China..
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19
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van Bodegraven EJ, van Asperen JV, Sluijs JA, van Deursen CBJ, van Strien ME, Stassen OMJA, Robe PAJ, Hol EM. GFAP alternative splicing regulates glioma cell-ECM interaction in a DUSP4-dependent manner. FASEB J 2019; 33:12941-12959. [PMID: 31480854 DOI: 10.1096/fj.201900916r] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Gliomas are the most common primary brain tumors. Their highly invasive character and the heterogeneity of active oncogenic pathways within single tumors complicate the development of curative therapies and cause poor patient prognosis. Glioma cells express the intermediate filament protein glial fibrillary acidic protein (GFAP), and the level of its alternative splice variant GFAP-δ, relative to its canonical splice variant GFAP-α, is higher in grade IV compared with lower-grade and lower malignant glioma. In this study we show that a high GFAP-δ/α ratio induces the expression of the dual-specificity phosphatase 4 (DUSP4) in focal adhesions. By focusing on pathways up- and downstream of DUSP4 that are involved in the cell-extracellular matrix interaction, we show that a high GFAP-δ/α ratio equips glioma cells to better invade the brain. This study supports the hypothesis that glioma cells with a high GFAP-δ/α ratio are highly invasive and more malignant cells, thus making GFAP alternative splicing a potential therapeutic target.-Van Bodegraven, E. J., van Asperen, J. V., Sluijs, J. A., van Deursen, C. B. J., van Strien, M. E., Stassen, O. M. J. A., Robe, P. A. J., Hol, E. M. GFAP alternative splicing regulates glioma cell-ECM interaction in a DUSP4-dependent manner.
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Affiliation(s)
- Emma J van Bodegraven
- Department of Translational Neurosciences, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Jessy V van Asperen
- Department of Translational Neurosciences, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Jacqueline A Sluijs
- Department of Translational Neurosciences, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Coen B J van Deursen
- Department of Translational Neurosciences, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Miriam E van Strien
- Department of Translational Neurosciences, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Oscar M J A Stassen
- Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland.,Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland
| | - Pierre A J Robe
- Department of Neurology and Neurosurgery, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands
| | - Elly M Hol
- Department of Translational Neurosciences, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, Amsterdam, The Netherlands
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20
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Wang Z, Yang MQ, Lei L, Fei LR, Zheng YW, Huang WJ, Li ZH, Liu CC, Xu HT. Overexpression of KRT17 promotes proliferation and invasion of non-small cell lung cancer and indicates poor prognosis. Cancer Manag Res 2019; 11:7485-7497. [PMID: 31496806 PMCID: PMC6689799 DOI: 10.2147/cmar.s218926] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 07/22/2019] [Indexed: 12/21/2022] Open
Abstract
Purpose Keratin 17 (KRT17) is a 48 KDa type I intermediate filament, which is mainly expressed in epithelial basal cells. KRT17 has been shown to be overexpressed in many malignant tumors and play an important role in the occurrence and development of tumors. Therefore, this study explored the role and underlying mechanism of KRT17 in non-small cell lung cancers (NSCLC). Methods KRT17 expression and its correlations with clinicopathological factors were examined in lung cancer tissues by immunohistochemistry. The prognosis value of KRT17 in NSCLCs was retrieved from The Cancer Genome Atlas (TCGA) online databases. The expression level of KRT17 was increased or decreased by KRT17 gene transfection or small RNA interference in lung cancer cells, respectively. Further, proliferation and invasiveness of lung cancer cells were determined by cell proliferation and invasion assays, respectively. Finally, expression levels of proteins related to Wnt signaling pathways and epithelial mesenchymal transition (EMT) were detected by Western blot. Results The expression level of KRT17 in NSCLCs was significantly higher than normal lung tissues. High expression of KRT17 predicted poor prognosis of patients with NSCLCs, especially lung adenocarcinomas, and was correlated with poor differentiation and lymphatic metastasis. Overexpression of KRT17 enhanced, while KRT17 knockdown inhibited, the proliferation and invasiveness of lung cancer cells. Overexpression of KRT17 up-regulated β-catenin activity and levels of Wnt target genes, such as cyclin D1, c-Myc, and MMP7. Moreover, KRT17 promoted EMT by up-regulating Vimentin, MMP-9, and Snail expression and down-regulating E-cadherin expression. Conclusion Overexpression of KRT17 is common in NSCLCs and indicates poor prognosis. Overexpression of KRT17 enhances the proliferation and invasiveness of NSCLC cells by activating the Wnt signaling pathway and EMT process. KRT17 is a potential indicator of NSCLC progression and poor survival.
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Affiliation(s)
- Zhao Wang
- Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang 110001, People's Republic of China.,Department of Pathology, General Hospital of Heilongjiang Land Reclamation Bureau, Harbin 150088, People's Republic of China
| | - Mai-Qing Yang
- Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang 110001, People's Republic of China.,Department of Pathology, Changyi People's Hospital, Changyi, People's Republic of China
| | - Lei Lei
- Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang 110001, People's Republic of China
| | - Liang-Ru Fei
- Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang 110001, People's Republic of China
| | - Yi-Wen Zheng
- Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang 110001, People's Republic of China
| | - Wen-Jing Huang
- Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang 110001, People's Republic of China
| | - Zhi-Han Li
- Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang 110001, People's Republic of China
| | - Chen-Chen Liu
- Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang 110001, People's Republic of China
| | - Hong-Tao Xu
- Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang 110001, People's Republic of China
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21
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Intermediate Filaments as Effectors of Cancer Development and Metastasis: A Focus on Keratins, Vimentin, and Nestin. Cells 2019; 8:cells8050497. [PMID: 31126068 PMCID: PMC6562751 DOI: 10.3390/cells8050497] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/16/2019] [Accepted: 05/22/2019] [Indexed: 02/08/2023] Open
Abstract
Intermediate filament (IF) proteins make up the largest family of cytoskeletal proteins in metazoans, and are traditionally known for their roles in fostering structural integrity in cells and tissues. Remarkably, individual IF genes are tightly regulated in a fashion that reflects the type of tissue, its developmental and differentiation stages, and biological context. In cancer, IF proteins serve as diagnostic markers, as tumor cells partially retain their original signature expression of IF proteins. However, there are also characteristic alterations in IF gene expression and protein regulation. The use of high throughput analytics suggests that tumor-associated alterations in IF gene expression have prognostic value. Parallel research is also showing that IF proteins directly and significantly impact several key cellular properties, including proliferation, death, migration, and invasiveness, with a demonstrated impact on the development, progression, and characteristics of various tumors. In this review, we draw from recent studies focused on three IF proteins most associated with cancer (keratins, vimentin, and nestin) to highlight how several “hallmarks of cancer” described by Hanahan and Weinberg are impacted by IF proteins. The evidence already in hand establishes that IF proteins function beyond their classical roles as markers and serve as effectors of tumorigenesis.
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22
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Theisen ER, Miller KR, Showpnil IA, Taslim C, Pishas KI, Lessnick SL. Transcriptomic analysis functionally maps the intrinsically disordered domain of EWS/FLI and reveals novel transcriptional dependencies for oncogenesis. Genes Cancer 2019; 10:21-38. [PMID: 30899417 PMCID: PMC6420793 DOI: 10.18632/genesandcancer.188] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
EWS/FLI is the pathognomic fusion oncoprotein that drives Ewing sarcoma. The amino-terminal EWS portion coordinates transcriptional regulation and the carboxy-terminal FLI portion contains an ETS DNA-binding domain. EWS/FLI acts as an aberrant transcription factor, orchestrating a complex mix of gene activation and repression, from both high affinity ETS motifs and repetitive GGAA-microsatellites. Our overarching hypothesis is that executing multi-faceted transcriptional regulation requires EWS/FLI to use distinct molecular mechanisms at different loci. Many attempts have been made to map distinct functions to specific features of the EWS domain, but described deletion mutants are either fully active or completely "dead" and other approaches have been limited by the repetitive and disordered nature of the EWS domain. Here, we use transcriptomic approaches to show an EWS/FLI mutant, called DAF, previously thought to be nonfunctional, displays context-dependent and partial transcriptional activity but lacks transforming capacity. Using transcriptomic and phenotypic anchorage-independent growth profiles of other EWS/FLI mutants coupled with reported EWS/FLI localization data, we have mapped the critical structure-function requirements of the EWS domain for EWS/FLI-mediated oncogenesis. This approach defined unique classes of EWS/FLI response elements and revealed novel structure-function relationships required for EWS/FLI activation at these response elements.
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Affiliation(s)
- Emily R Theisen
- Center for Childhood Cancer and Blood Diseases, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Kyle R Miller
- Center for Childhood Cancer and Blood Diseases, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Iftekhar A Showpnil
- Center for Childhood Cancer and Blood Diseases, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA.,Molecular, Cellular, and Developmental Biology Program, The Ohio State University, Columbus, OH, USA
| | - Cenny Taslim
- Center for Childhood Cancer and Blood Diseases, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Kathleen I Pishas
- Center for Childhood Cancer and Blood Diseases, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Stephen L Lessnick
- Center for Childhood Cancer and Blood Diseases, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA.,Molecular, Cellular, and Developmental Biology Program, The Ohio State University, Columbus, OH, USA.,Division of Pediatric Hematology/Oncology/Blood & Marrow Transplant, The Ohio State University, Columbus, OH, USA
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23
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Fleming JT, Brignola E, Chen L, Guo Y, Zhao S, Wang Q, Li B, Correa H, Ermilov AN, Dlugosz AA, Chiang C. Insight into the Etiology of Undifferentiated Soft Tissue Sarcomas from a Novel Mouse Model. Mol Cancer Res 2019; 17:1024-1035. [PMID: 30683671 DOI: 10.1158/1541-7786.mcr-18-0117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 06/06/2018] [Accepted: 01/22/2019] [Indexed: 11/16/2022]
Abstract
Aberrant activation of the Hedgehog signaling pathway has been linked to the formation of numerous cancer types, including the myogenic soft tissue sarcoma, embryonal rhabdomyosarcoma (eRMS). Here, we report PCG2, a novel mouse model in which human GLI2A, a constitutive activator of Hedgehog signaling, induced undifferentiated sarcomas that were phenotypically divergent from eRMS. Rather, sarcomas arising in PCG2 mice featured some characteristics that were reminiscent of Ewing sarcoma. Even though it is widely understood that Ewing sarcoma formation is driven by EWS-ETS gene fusions, a genetically defined mouse model is not well-established. While EWS-ETS gene fusions were not present in PCG2 sarcomas, precluding their designation as Ewing sarcoma, we did find that GLI2A induced expression of known EWS-ETS gene targets essential to Ewing pathogenesis, most notably, Nkx2.2. Moreover, we found that naïve mesenchymal progenitors originate tumors in PCG2 mice. Altogether, our work provides a novel genetic mouse model, which directly connects oncogenic Hedgehog activity to the etiology of undifferentiated soft tissue sarcomas for the first time. IMPLICATIONS: The finding that activation of Gli2 transcription factor is sufficient to induce Ewing-like sarcomas provides a direct transformative role of the Hedgehog signaling pathway in undifferentiated soft tissue sarcoma.
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Affiliation(s)
- Jonathan T Fleming
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Emily Brignola
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Lei Chen
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Yan Guo
- Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee
| | - Shilin Zhao
- Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee
| | - Quan Wang
- Department of Molecular Physiology and Biophysics, Vanderbilt Genetics Institute, Vanderbilt University, Nashville, Tennessee
| | - Bingshan Li
- Department of Molecular Physiology and Biophysics, Vanderbilt Genetics Institute, Vanderbilt University, Nashville, Tennessee
| | - Hernán Correa
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee
| | - Alexandre N Ermilov
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Andrzej A Dlugosz
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Chin Chiang
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee.
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24
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Yang L, Zhang S, Wang G. Keratin 17 in disease pathogenesis: from cancer to dermatoses. J Pathol 2018; 247:158-165. [PMID: 30306595 DOI: 10.1002/path.5178] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/17/2018] [Accepted: 10/02/2018] [Indexed: 12/16/2022]
Abstract
Keratin 17 (K17) is a type I intermediate filament mainly expressed in the basal cells of epithelia. As a multifaceted cytoskeletal protein, K17 regulates a myriad of biological processes, including cell proliferation and growth, skin inflammation and hair follicle cycling. Aberrant overexpression of K17 is found in various diseases ranging from psoriasis to malignancies such as breast, cervical, oral squamous and gastric carcinomas. Moreover, genetic mutation in KRT17 is related to tissue-specific diseases, represented by steatocystoma multiplex and pachyonychia congenita. In this review, we summarize our findings concerning the regulatory mechanisms of K17 overexpression in psoriasis and compare them to the literature relating to other diseases. We discuss data that proinflammatory cytokines, including interleukin-17 (IL-17), IL-22, interferon-gamma (IFN-γ), transforming growth factor-beta (TGF-β) and transcription factors glioma-associated oncogene homolog 1/2 (Gli1/2), Nrf2 and p53 can regulate K17 by transcriptional and translational control. Moreover, post-translational modification, including phosphorylation and ubiquitination, is involved in the regulation of K17 stability and biological functions. We therefore review the current understanding of the K17 regulatory mechanism and its pathogenic role in diseases from dermatoses to cancer. Prospects for anti-K17 therapy in diagnosis, prognosis and disease treatment are also discussed. Copyright © 2018 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Luting Yang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR, China
| | - Shaolong Zhang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR, China
| | - Gang Wang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR, China
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25
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Xu E, Yang M, Liu C, Liu K, Yang T, Chou T, Hwang T, Hsu C. Decreasing cytokeratin 17 expression in head and neck cancer predicts nodal metastasis and poor prognosis: The first evidence. Clin Otolaryngol 2018; 43:1010-1018. [DOI: 10.1111/coa.13092] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/07/2018] [Indexed: 11/30/2022]
Affiliation(s)
- E.‐S. Xu
- Institute of Clinical Medicine National Yang Ming University Taipei Taiwan
- Department of Otolaryngology E‐Da Hospital and I‐Shou University Kaohsiung Taiwan
| | - M.‐H. Yang
- Institute of Clinical Medicine National Yang Ming University Taipei Taiwan
- Division of Medical Oncology Department of Oncology Taipei Veterans General Hospital Taipei Taiwan
| | - C.‐Y. Liu
- Department of Otolaryngology E‐Da Hospital and I‐Shou University Kaohsiung Taiwan
| | - K.‐W. Liu
- Department of Pathology E‐Da Hospital Kaohsiung Taiwan
| | - T.‐T. Yang
- School of Chinese Medicine for Post‐Baccalaureate I‐Shou University Kaohsiung Taiwan
| | - T.‐Y. Chou
- Institute of Clinical Medicine National Yang Ming University Taipei Taiwan
- Division of Molecular Pathology Department of Pathology and Laboratory Medicine Taipei Veterans General Hospital Taipei Taiwan
| | - T.‐Z. Hwang
- Department of Otolaryngology E‐Da Hospital and I‐Shou University Kaohsiung Taiwan
| | - C.‐T. Hsu
- Department of Pathology E‐Da Hospital Kaohsiung Taiwan
- School of Chinese Medicine for Post‐Baccalaureate I‐Shou University Kaohsiung Taiwan
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26
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Luo W, Xu C, Ayello J, Dela Cruz F, Rosenblum JM, Lessnick SL, Cairo MS. Protein phosphatase 1 regulatory subunit 1A in ewing sarcoma tumorigenesis and metastasis. Oncogene 2017; 37:798-809. [PMID: 29059150 DOI: 10.1038/onc.2017.378] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 09/05/2017] [Accepted: 09/07/2017] [Indexed: 02/06/2023]
Abstract
Protein phosphatase inhibitors are often considered as tumor promoters. Protein phosphatase 1 regulatory subunit 1A (PPP1R1A) is a potent protein phosphatase 1 (PP1) inhibitor; however, its role in tumor development is largely undefined. Here we characterize, for the first time, the functions of PPP1R1A in Ewing sarcoma (ES) pathogenesis. We found that PPP1R1A is one of the top ranked target genes of EWS/FLI, the master regulator of ES, and is upregulated by EWS/FLI via a GGAA microsatellite enhancer element. Depletion of PPP1R1A resulted in a significant decrease in oncogenic transformation and cell migration in vitro as well as xenograft tumor growth and metastasis in an orthotopic mouse model. RNA-sequencing and functional annotation analyses revealed that PPP1R1A regulates genes associated with various cellular functions including cell junction, adhesion and neurogenesis. Interestingly, we found a significant overlap of PPP1R1A-regulated gene set with that of ZEB2 and EWS, which regulates metastasis and neuronal differentiation in ES, respectively. Further studies for characterization of the molecular mechanisms revealed that activation of PPP1R1A by PKA phosphorylation at Thr35, and subsequent PP1 binding and inhibition, was required for PPP1R1A-mediated tumorigenesis and metastasis, likely by increasing the phosphorylation levels of various PP1 substrates. Furthermore, we found that a PKA inhibitor impaired ES cell proliferation, tumor growth and metastasis, which was rescued by the constitutively active PPP1R1A. Together, these results offered new insights into the role and mechanism of PPP1R1A in tumor development and identified an important kinase and phosphatase pathway, PKA/PPP1R1A/PP1, in ES pathogenesis. Our findings strongly suggest a potential therapeutic value of inhibition of the PKA/PPP1R1A/PP1 pathway in the treatment of primary and metastatic ES.
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Affiliation(s)
- W Luo
- Departments of Pediatrics, New York Medical College, Valhalla, NY, USA.,Departments of Pathology, New York Medical College, Valhalla, NY, USA
| | - C Xu
- James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA
| | - J Ayello
- Departments of Pediatrics, New York Medical College, Valhalla, NY, USA
| | - F Dela Cruz
- Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - J M Rosenblum
- Departments of Pediatrics, New York Medical College, Valhalla, NY, USA
| | - S L Lessnick
- Nationwide Children's Hospital, Columbus, OH, USA
| | - M S Cairo
- Departments of Pediatrics, New York Medical College, Valhalla, NY, USA.,Departments of Pathology, New York Medical College, Valhalla, NY, USA.,Departments of Medicine, New York Medical College, Valhalla, NY, USA.,Departments of Immunology and Microbiology, New York Medical College, Valhalla, NY, USA.,Departments of Cell Biology and Anatomy, New York Medical College, Valhalla, NY, USA
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27
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GFAPδ/GFAPα ratio directs astrocytoma gene expression towards a more malignant profile. Oncotarget 2017; 8:88104-88121. [PMID: 29152145 PMCID: PMC5675697 DOI: 10.18632/oncotarget.21540] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 07/25/2017] [Indexed: 12/25/2022] Open
Abstract
Astrocytomas are the most common malignant brain tumours and are to date incurable. It is unclear how astrocytomas progress into higher malignant grades. The intermediate filament cytoskeleton is emerging as an important regulator of malignancy in several tumours. The majority of the astrocytomas express the intermediate filament protein Glial Fibrillary Acidic Protein (GFAP). Several GFAP splice variants have been identified and the main variants expressed in human astrocytoma are the GFAPα and GFAPδ isoforms. Here we show a significant downregulation of GFAPα in grade IV astrocytoma compared to grade II and III, resulting in an increased GFAPδ/α ratio. Mimicking this increase in GFAPδ/α ratio in astrocytoma cell lines and comparing the subsequent transcriptomic changes with the changes in the patient tumours, we have identified a set of GFAPδ/α ratio-regulated high-malignant and low-malignant genes. These genes are involved in cell proliferation and protein phosphorylation, and their expression correlated with patient survival. We additionally show that changing the ratio of GFAPδ/α, by targeting GFAP expression, affected expression of high-malignant genes. Our data imply that regulating GFAP expression and splicing are novel therapeutic targets that need to be considered as a treatment for astrocytoma.
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28
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Sanghvi-Shah R, Weber GF. Intermediate Filaments at the Junction of Mechanotransduction, Migration, and Development. Front Cell Dev Biol 2017; 5:81. [PMID: 28959689 PMCID: PMC5603733 DOI: 10.3389/fcell.2017.00081] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 08/30/2017] [Indexed: 01/04/2023] Open
Abstract
Mechanically induced signal transduction has an essential role in development. Cells actively transduce and respond to mechanical signals and their internal architecture must manage the associated forces while also being dynamically responsive. With unique assembly-disassembly dynamics and physical properties, cytoplasmic intermediate filaments play an important role in regulating cell shape and mechanical integrity. While this function has been recognized and appreciated for more than 30 years, continually emerging data also demonstrate important roles of intermediate filaments in cell signal transduction. In this review, with a particular focus on keratins and vimentin, the relationship between the physical state of intermediate filaments and their role in mechanotransduction signaling is illustrated through a survey of current literature. Association with adhesion receptors such as cadherins and integrins provides a critical interface through which intermediate filaments are exposed to forces from a cell's environment. As a consequence, these cytoskeletal networks are posttranslationally modified, remodeled and reorganized with direct impacts on local signal transduction events and cell migratory behaviors important to development. We propose that intermediate filaments provide an opportune platform for cells to both cope with mechanical forces and modulate signal transduction.
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Affiliation(s)
- Rucha Sanghvi-Shah
- Department of Biological Sciences, Rutgers University-NewarkNewark, NJ, United States
| | - Gregory F Weber
- Department of Biological Sciences, Rutgers University-NewarkNewark, NJ, United States
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29
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Kim K, Lee HW, Chae SW, Kim DH, Do IG, Lee HJ, Do SI, Min KW, Pyo JS, Shin JH, Sohn JH. Cytokeratin 17 Expression is Associated With Poor Prognosis in Gallbladder Adenocarcinoma. Appl Immunohistochem Mol Morphol 2017; 25:346-350. [DOI: 10.1097/pai.0000000000000307] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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30
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GLI-mediated Keratin 17 expression promotes tumor cell growth through the anti-apoptotic function in oral squamous cell carcinomas. J Cancer Res Clin Oncol 2017; 143:1381-1393. [PMID: 28342001 DOI: 10.1007/s00432-017-2398-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 03/14/2017] [Indexed: 01/01/2023]
Abstract
PURPOSE Keratin 17 (KRT17) has been suggested as a potential diagnostic marker of squamous cell carcinoma including oral squamous cell carcinoma (OSCC). The current study was conducted to clarify the function of KRT17 and its expression mechanism in OSCC. METHODS Immunohistochemical analyses were carried out to examine the expression of KRT17, GLI family zinc finger (GLI)-1, GLI-2, or cleaved caspase-3 in OSCCs. The expression of KRT17, GLI-1, or GLI-2 was investigated among OSCC cell lines, and the effects of loss-of-function of KRT17 or GLI, using siRNA or inhibitor, on the cell growth of the OSCC cell line HSC-2 particularly with respect to apoptosis were examined. RESULTS Immunohistochemical analyses of tissue specimens obtained from 78 OSCC patients revealed that KRT17 was not observed in non-tumor regions but was strongly expressed at high frequencies in tumor regions. Knockdown of KRT17 increased the number of cleaved caspase-3-positive cells, leading to the reduction of cell number. Loss-of-function of GLI-1 or GLI-2 also increased the cell numbers of apoptotic cells positive for staining of Annexin-V and propidium iodide (PI) and the terminal deoxynucleotidyl transferase dUTP-biotin nick-end labeling (TUNEL) method, and induced DNA fragmentation. This inhibitory effect on cell growth was partially rescued by exogenous KRT17 expression. In the KRT17-positive regions in OSCCs, GLI-1 or GLI-2 was frequently detected, and the number of cells with cleaved caspase-3 positive was decreased. CONCLUSIONS KRT17 promotes tumor cell growth, at least partially, through its anti-apoptotic effect as a result of the KRT17 overexpression by GLIs in OSCC.
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31
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Salas PJ, Forteza R, Mashukova A. Multiple roles for keratin intermediate filaments in the regulation of epithelial barrier function and apico-basal polarity. Tissue Barriers 2016; 4:e1178368. [PMID: 27583190 PMCID: PMC4993576 DOI: 10.1080/21688370.2016.1178368] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 04/05/2016] [Accepted: 04/07/2016] [Indexed: 12/27/2022] Open
Abstract
As multicellular organisms evolved a family of cytoskeletal proteins, the keratins (types I and II) expressed in epithelial cells diversified in more than 20 genes in vertebrates. There is no question that keratin filaments confer mechanical stiffness to cells. However, such a number of genes can hardly be explained by evolutionary advantages in mechanical features. The use of transgenic mouse models has revealed unexpected functional relationships between keratin intermediate filaments and intracellular signaling. Accordingly, loss of keratins or mutations in keratins that cause or predispose to human diseases, result in increased sensitivity to apoptosis, regulation of innate immunity, permeabilization of tight junctions, and mistargeting of apical proteins in different epithelia. Precise mechanistic explanations for these phenomena are still lacking. However, immobilization of membrane or cytoplasmic proteins, including chaperones, on intermediate filaments (“scaffolding”) appear as common molecular mechanisms and may explain the need for so many different keratin genes in vertebrates.
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Affiliation(s)
- Pedro J Salas
- Department of Cell Biology, Miller School of Medicine, University of Miami , Miami, FL, USA
| | - Radia Forteza
- Department of Cell Biology, Miller School of Medicine, University of Miami , Miami, FL, USA
| | - Anastasia Mashukova
- Department of Cell Biology, Miller School of Medicine, University of Miami, Miami, FL, USA; Department of Physiology, Nova Southeastern University, Fort Lauderdale, FL, USA
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32
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Loss of Keratin 17 induces tissue-specific cytokine polarization and cellular differentiation in HPV16-driven cervical tumorigenesis in vivo. Oncogene 2016; 35:5653-5662. [PMID: 27065324 DOI: 10.1038/onc.2016.102] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 01/04/2016] [Accepted: 01/19/2016] [Indexed: 01/19/2023]
Abstract
Despite preventive human papilloma virus (HPV) vaccination efforts, cervical cancer remains a leading cause of death in women worldwide. Development of therapeutic approaches for cervical cancer are hampered by a lack of mechanistic insight during tumorigenesis. The cytoskeletal protein Keratin 17 (KRT17;K17) is robustly expressed in a broad array of carcinomas, including in cervical tumors, where it has both diagnostic and prognostic value. In this study, we have established multiple functional roles for K17 in the promotion of cervical tumorigenesis in vivo using the established HPV16tg mouse model for cervical squamous cell carcinoma. In HPV16tg/+;Krt17-/-relative to HPV16tg/+ reference female mice, onset of cervical lesions is delayed and closely paralleled by marked reductions in hyperplasia, dysplasia and vascularization. In addition, loss of Krt17 is associated with a cytokine polarization and recruitment of effector immune cells to lesion-prone cervical epithelia. Further, we observed marked enhancement of terminal differentiation in HPV16tg/+;Krt17-/-cervical epithelium accompanied by a stimulation and expansion in the expression of p63, a known basal/reserve cell marker in this tissue. Altogether, the data suggest that the loss of Krt17 may foster an overall protective environment for lesion-prone cervical tissue. In addition to providing new insights into the immunomodulatory and cellular mechanisms of cervical tumorigenesis, these findings may help guide the development of future therapies including vaccines.
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33
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Liu H, Liu Q, Ge Y, Zhao Q, Zheng X, Zhao Y. hTERT promotes cell adhesion and migration independent of telomerase activity. Sci Rep 2016; 6:22886. [PMID: 26971878 PMCID: PMC4789728 DOI: 10.1038/srep22886] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 02/23/2016] [Indexed: 02/07/2023] Open
Abstract
hTERT, a catalytic component of human telomerase, is undetectable in normal somatic cells but up-regulated in cancer and stem cells where telomere length is maintained by telomerase. Accumulated evidence indicates that hTERT may have noncanonical functions beyond telomerase by regulating the expression of particular genes. However, comprehensive identification of the genes regulated by hTERT is unavailable. In this report, we expressed WT hTERT and hTERTmut which displays dysfunctional catalytic activity, in human U2OS cancer cells and VA-13 immortalized fibroblast cells, both of which lack endogenous hTERT and hTR expression. Changes in gene expression induced by hTERT and hTERT-mut expression were determined by genome-wide RNA-seq and verified by qPCR. Our results showed that hTERT affects different genes in two cell lines, implying that the regulation of gene expression by hTERT is indirect and cell type dependent. Moreover, functional analysis identifies cell adhesion-related genes that have been changed by hTERT in both cell lines. Adhesion experiments revealed that hTERT expression significantly increases cell adhesion. Monolayer wound healing and transwell assays demonstrated increased cell migration upon hTERT expression. These results provide new evidence to support a noncanonical function for hTERT in promoting tumorigenesis.
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Affiliation(s)
- Haiying Liu
- Key Laboratory of Gene Engineering of the Ministry of Education, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006 P. R. China.,Collaborative Innovation Center of High Performance Computing, National University of Defense Technology, Changsha 410073, P. R. China
| | - Qianqian Liu
- Key Laboratory of Gene Engineering of the Ministry of Education, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006 P. R. China.,Collaborative Innovation Center of High Performance Computing, National University of Defense Technology, Changsha 410073, P. R. China
| | - Yuanlong Ge
- Key Laboratory of Gene Engineering of the Ministry of Education, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006 P. R. China.,Collaborative Innovation Center of High Performance Computing, National University of Defense Technology, Changsha 410073, P. R. China
| | - Qi Zhao
- Key Laboratory of Gene Engineering of the Ministry of Education, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006 P. R. China
| | - Xiaohui Zheng
- Key Laboratory of Gene Engineering of the Ministry of Education, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006 P. R. China.,Collaborative Innovation Center of High Performance Computing, National University of Defense Technology, Changsha 410073, P. R. China
| | - Yong Zhao
- Key Laboratory of Gene Engineering of the Ministry of Education, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006 P. R. China.,Collaborative Innovation Center of High Performance Computing, National University of Defense Technology, Changsha 410073, P. R. China
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34
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Liao C, Xie G, Zhu L, Chen X, Li X, Lu H, Xu B, Ramot Y, Paus R, Yue Z. p53 Is a Direct Transcriptional Repressor of Keratin 17: Lessons from a Rat Model of Radiation Dermatitis. J Invest Dermatol 2016; 136:680-689. [DOI: 10.1016/j.jid.2015.12.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 11/04/2015] [Accepted: 11/06/2015] [Indexed: 11/15/2022]
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35
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Knott MML, Dallmayer M, Grünewald TGP. Next steps in preventing Ewing sarcoma progression. Future Oncol 2015; 12:1-4. [PMID: 26615856 DOI: 10.2217/fon.15.298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- Max M L Knott
- Laboratory for Pediatric Sarcoma Biology, Institute of Pathology of the LMU Munich, Munich, Germany
| | - Marlene Dallmayer
- Laboratory for Pediatric Sarcoma Biology, Institute of Pathology of the LMU Munich, Munich, Germany
| | - Thomas G P Grünewald
- Laboratory for Pediatric Sarcoma Biology, Institute of Pathology of the LMU Munich, Munich, Germany
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36
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Hobbs RP, DePianto DJ, Jacob JT, Han MC, Chung BM, Batazzi AS, Poll BG, Guo Y, Han J, Ong S, Zheng W, Taube JM, Čiháková D, Wan F, Coulombe PA. Keratin-dependent regulation of Aire and gene expression in skin tumor keratinocytes. Nat Genet 2015; 47:933-8. [PMID: 26168014 PMCID: PMC4520766 DOI: 10.1038/ng.3355] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 06/19/2015] [Indexed: 12/20/2022]
Abstract
Expression of the intermediate filament protein keratin 17 (K17) is robustly upregulated in inflammatory skin diseases and in many tumors originating in stratified and pseudostratified epithelia. We report that autoimmune regulator (Aire), a transcriptional regulator, is inducibly expressed in human and mouse tumor keratinocytes in a K17-dependent manner and is required for timely onset of Gli2-induced skin tumorigenesis in mice. The induction of Aire mRNA in keratinocytes depends on a functional interaction between K17 and the heterogeneous nuclear ribonucleoprotein hnRNP K. Further, K17 colocalizes with Aire protein in the nucleus of tumor-prone keratinocytes, and each factor is bound to a specific promoter region featuring an NF-κB consensus sequence in a relevant subset of K17- and Aire-dependent proinflammatory genes. These findings provide radically new insight into keratin intermediate filament and Aire function, along with a molecular basis for the K17-dependent amplification of inflammatory and immune responses in diseased epithelia.
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Affiliation(s)
- Ryan P. Hobbs
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Daryle J. DePianto
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Justin T. Jacob
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Minerva C. Han
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Byung-Min Chung
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Adriana S. Batazzi
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Brian G. Poll
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Yajuan Guo
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Jingnan Han
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - SuFey Ong
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Wenxin Zheng
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Janis M. Taube
- Department of Pathology, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
- Department of Dermatology, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Daniela Čiháková
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
- Department of Pathology, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Fengyi Wan
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
- Department of Oncology, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore MD 21205, USA
| | - Pierre A. Coulombe
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
- Department of Dermatology, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
- Department of Oncology, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
- Department of Biological Chemistry, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore MD 21205, USA
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37
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Escobar-Hoyos LF, Shah R, Roa-Peña L, Vanner EA, Najafian N, Banach A, Nielsen E, Al-Khalil R, Akalin A, Talmage D, Shroyer KR. Keratin-17 Promotes p27KIP1 Nuclear Export and Degradation and Offers Potential Prognostic Utility. Cancer Res 2015; 75:3650-62. [PMID: 26109559 DOI: 10.1158/0008-5472.can-15-0293] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 05/14/2015] [Indexed: 11/16/2022]
Abstract
Keratins that are overexpressed selectively in human carcinomas may offer diagnostic and prognostic utility. In this study, we show that high expression of keratin-17 (K17) predicts poor outcome in patients with cervical cancer, at early or late stages of disease, surpassing in accuracy either tumor staging or loss of p27(KIP1) as a negative prognostic marker in this setting. We investigated the mechanistic basis for the biologic impact of K17 through loss- and gain-of-function experiments in human cervix, breast, and pancreatic cancer cells. Specifically, we determined that K17 functions as an oncoprotein by regulating the subcellular localization and degradation of p27(KIP1). We found that K17 was released from intermediate filaments and translocated into the nucleus via a nuclear localization signal (NLS), specific among keratins, where it bound p27(KIP1) during G1 phase of the cell cycle. p27(KIP1) lacks a nuclear export signal (NES) and requires an adaptor for CRM1 binding for nuclear export. In K17, we defined and validated a leucine-rich NES that mediated CRM1 binding for export. Cervical cancer cells expressing K17 mutations in its NLS or NES signals exhibited an increase in levels of nuclear p27(KIP1), whereas cells expressing wild-type K17 exhibited a depletion in total endogenous p27(KIP1). In clinical specimens of cervical cancer, we confirmed that the expressions of K17 and p27(KIP1) were inversely correlated, both across tumors and within individual tumors. Overall, our findings establish that K17 functions specially among keratins as an oncoprotein by controlling the ability of p27(KIP1) to influence cervical cancer pathogenesis.
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Affiliation(s)
- Luisa F Escobar-Hoyos
- Department of Pharmacological Sciences, Stony Brook Medicine, Stony Brook, New York. Department of Pathology, Stony Brook Medicine, Stony Brook, New York. Department of Biology, Research Group Genetic Toxicology and Cytogenetics, Department of Natural Sciences and Education, Universidad del Cauca, Popayán, Cauca, Colombia
| | - Ruchi Shah
- Department of Pathology, Stony Brook Medicine, Stony Brook, New York
| | - Lucia Roa-Peña
- Department of Pathology, Stony Brook Medicine, Stony Brook, New York. Department of Pathology, School of Medicine, National University of Colombia, Bogotá, Cundinamarca, Colombia
| | | | - Nilofar Najafian
- Department of Pathology, Stony Brook Medicine, Stony Brook, New York
| | - Anna Banach
- Molecular and Cellular Biology, Stony Brook Medicine, Stony Brook, New York
| | - Erik Nielsen
- Department of Pathology, Stony Brook Medicine, Stony Brook, New York
| | - Ramsey Al-Khalil
- Department of Pathology, Stony Brook Medicine, Stony Brook, New York
| | - Ali Akalin
- Department of Pathology, University of Massachusetts Memorial Medical Center, Worcester, Massachusetts
| | - David Talmage
- Department of Pharmacological Sciences, Stony Brook Medicine, Stony Brook, New York
| | - Kenneth R Shroyer
- Department of Pathology, Stony Brook Medicine, Stony Brook, New York.
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EWS/FLI utilizes NKX2-2 to repress mesenchymal features of Ewing sarcoma. Genes Cancer 2015; 6:129-43. [PMID: 26000096 PMCID: PMC4426950 DOI: 10.18632/genesandcancer.57] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 04/16/2015] [Indexed: 12/23/2022] Open
Abstract
In Ewing sarcoma, NKX2-2 is a critical activated target of the oncogenic transcription factor EWS/FLI that is required for transformation. However, its biological function in this malignancy is unknown. Here we provide evidence that NKX2-2 mediates the EWS/FLI-controlled block of mesenchymal features. Transcriptome-wide RNA sequencing revealed that NKX2-2 represses cell adhesion and extracellular matrix organization genes. NKX2-2-depleted cells form more focal adhesions and organized actin stress fibers, and spread over a wider area—hallmarks of mesenchymally derived cells. Furthermore, NKX2-2 represses the actin-stabilizing protein zyxin, suggesting that these morphological changes are attributable to zyxin de-repression. In addition, NKX2-2-knockdown cells display marked increases in migration and substrate adhesion. However, only part of the EWS/FLI phenotype is NKX2-2-dependent; consequently, NKX2-2 is insufficient to rescue EWS/FLI repression of mesenchymalization. Strikingly, we found that EWS/FLI-and NKX22-repressed genes are activated by ZEB2, which was previously shown to block Ewing sarcoma epithelialization. Together, these data support an emerging theme wherein Ewing sarcoma cells highly express transcription factors that maintain an undifferentiated state. Importantly, co-opting epithelial and mesenchymal traits by Ewing sarcoma cells may explain how the primary tumor grows rapidly while also “passively” metastasizing, without the need for transitions toward differentiated states, as in carcinomas.
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Expression profiling reveals genes involved in the regulation of wool follicle bulb regression and regeneration in sheep. Int J Mol Sci 2015; 16:9152-66. [PMID: 25915029 PMCID: PMC4463583 DOI: 10.3390/ijms16059152] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 04/08/2015] [Accepted: 04/10/2015] [Indexed: 01/04/2023] Open
Abstract
Wool is an important material in textile manufacturing. In order to investigate the intrinsic factors that regulate wool follicle cycling and wool fiber properties, Illumina sequencing was performed on wool follicle bulb samples from the middle anagen, catagen and late telogen/early anagen phases. In total, 13,898 genes were identified. KRTs and KRTAPs are the most highly expressed gene families in wool follicle bulb. In addition, 438 and 203 genes were identified to be differentially expressed in wool follicle bulb samples from the middle anagen phase compared to the catagen phase and the samples from the catagen phase compared to the late telogen/early anagen phase, respectively. Finally, our data revealed that two groups of genes presenting distinct expression patterns during the phase transformation may have important roles for wool follicle bulb regression and regeneration. In conclusion, our results demonstrated the gene expression patterns in the wool follicle bulb and add new data towards an understanding of the mechanisms involved in wool fiber growth in sheep.
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Chung BM, Arutyunov A, Ilagan E, Yao N, Wills-Karp M, Coulombe PA. Regulation of C-X-C chemokine gene expression by keratin 17 and hnRNP K in skin tumor keratinocytes. ACTA ACUST UNITED AC 2015; 208:613-27. [PMID: 25713416 PMCID: PMC4347647 DOI: 10.1083/jcb.201408026] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Interaction between K17 and hnRNP K regulates CXCR3 signaling in an RSK-dependent fashion to promote epithelial tumor cell growth and invasion. High levels of the intermediate filament keratin 17 (K17) correlate with a poor prognosis for several types of epithelial tumors. However, the causal relationship and underlying mechanisms remain undefined. A recent study suggested that K17 promotes skin tumorigenesis by fostering a specific type of inflammation. We report here that K17 interacts with the RNA-binding protein hnRNP K, which has also been implicated in cancer. K17 is required for the cytoplasmic localization of hnRNP K and for its role in regulating the expression of multiple pro-inflammatory mRNAs. Among these are the CXCR3 ligands CXCL9, CXCL10, and CXCL11, which together form a signaling axis with an established role in tumorigenesis. The K17–hnRNP K partnership is regulated by the ser/thr kinase RSK and required for CXCR3-dependent tumor cell growth and invasion. These findings functionally integrate K17, hnRNP K, and gene expression along with RSK and CXCR3 signaling in a keratinocyte-autonomous axis and provide a potential basis for their implication in tumorigenesis.
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Affiliation(s)
- Byung Min Chung
- Department of Biochemistry and Molecular Biology and Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health; and Department of Biological Chemistry, Department of Dermatology, and Department of Oncology, School of Medicine, Johns Hopkins University, MD 21205
| | - Artem Arutyunov
- Department of Biochemistry and Molecular Biology and Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health; and Department of Biological Chemistry, Department of Dermatology, and Department of Oncology, School of Medicine, Johns Hopkins University, MD 21205
| | - Erika Ilagan
- Department of Biochemistry and Molecular Biology and Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health; and Department of Biological Chemistry, Department of Dermatology, and Department of Oncology, School of Medicine, Johns Hopkins University, MD 21205
| | - Nu Yao
- Department of Biochemistry and Molecular Biology and Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health; and Department of Biological Chemistry, Department of Dermatology, and Department of Oncology, School of Medicine, Johns Hopkins University, MD 21205
| | - Marsha Wills-Karp
- Department of Biochemistry and Molecular Biology and Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health; and Department of Biological Chemistry, Department of Dermatology, and Department of Oncology, School of Medicine, Johns Hopkins University, MD 21205
| | - Pierre A Coulombe
- Department of Biochemistry and Molecular Biology and Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health; and Department of Biological Chemistry, Department of Dermatology, and Department of Oncology, School of Medicine, Johns Hopkins University, MD 21205 Department of Biochemistry and Molecular Biology and Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health; and Department of Biological Chemistry, Department of Dermatology, and Department of Oncology, School of Medicine, Johns Hopkins University, MD 21205 Department of Biochemistry and Molecular Biology and Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health; and Department of Biological Chemistry, Department of Dermatology, and Department of Oncology, School of Medicine, Johns Hopkins University, MD 21205 Department of Biochemistry and Molecular Biology and Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health; and Department of Biological Chemistry, Department of Dermatology, and Department of Oncology, School of Medicine, Johns Hopkins University, MD 21205
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Leduc C, Etienne-Manneville S. Intermediate filaments in cell migration and invasion: the unusual suspects. Curr Opin Cell Biol 2015; 32:102-12. [PMID: 25660489 DOI: 10.1016/j.ceb.2015.01.005] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 01/15/2015] [Accepted: 01/21/2015] [Indexed: 12/22/2022]
Abstract
Cell migration is a multistep process which relies on the coordination of cytoskeletal structures in space and time. While the roles of actin and microtubules have been investigated in great details, the lack of inhibitors and visualizing tools and the large number of proteins forming intermediate filaments (IFs) have delayed the characterization of IF functions during migration. However, a large body of evidence has progressively pointed to changes in IF composition as an important parameter in the regulation of cell migratory properties both during development and tumor invasion. More recent in-depth analyses show that IFs are dynamically reorganized to participate, together with microfilaments and microtubules, to the key steps leading to cell migration.
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Affiliation(s)
- Cécile Leduc
- Institut Pasteur - CNRS UMR 3691, Cell Polarity, Migration and Cancer Unit, 25 rue du Dr Roux, 75724 Paris Cedex 15, France
| | - Sandrine Etienne-Manneville
- Institut Pasteur - CNRS UMR 3691, Cell Polarity, Migration and Cancer Unit, 25 rue du Dr Roux, 75724 Paris Cedex 15, France.
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Toivola DM, Boor P, Alam C, Strnad P. Keratins in health and disease. Curr Opin Cell Biol 2015; 32:73-81. [PMID: 25599598 DOI: 10.1016/j.ceb.2014.12.008] [Citation(s) in RCA: 157] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 12/09/2014] [Accepted: 12/19/2014] [Indexed: 02/01/2023]
Abstract
The cytoprotective keratins (K) compose the intermediate filaments of epithelial cells and their inherited and spontaneous mutations give rise to keratinopathies. For example, mutations in K1/K5/K10/K14 cause epidermal skin diseases whereas simple epithelial K8/K18/K19 variants predispose to development of several liver disorders. Due to their abundance, tissue- and context-specific expression, keratins constitute excellent diagnostic markers of both neoplastic and non-neoplastic diseases. During injury and in disease, keratin expression levels, cellular localization or posttranslational modifications are altered. Accumulating evidence suggests that these changes modulate multiple processes including cell migration, tumor growth/metastasis and development of infections. Therefore, our understanding of keratins is shifting from diagnostic markers to active disease modifiers.
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Affiliation(s)
- Diana M Toivola
- Department of Biosciences, Cell Biology, Åbo Akademi University and Turku Center for Disease Modeling, University of Turku, Turku, Finland.
| | - Peter Boor
- Institute of Pathology and Department of Nephrology, RWTH University, Aachen, Germany; Institute of Molecular Biomedicine, Comenius University, Bratislava, Slovakia
| | - Catharina Alam
- Department of Biosciences, Cell Biology, Åbo Akademi University and Turku Center for Disease Modeling, University of Turku, Turku, Finland
| | - Pavel Strnad
- IZKF and Department of Internal Medicine III, University Hospital Aachen, Germany.
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Chaturvedi A, Hoffman LM, Jensen CC, Lin YC, Grossmann AH, Randall RL, Lessnick SL, Welm AL, Beckerle MC. Molecular dissection of the mechanism by which EWS/FLI expression compromises actin cytoskeletal integrity and cell adhesion in Ewing sarcoma. Mol Biol Cell 2014; 25:2695-709. [PMID: 25057021 PMCID: PMC4161506 DOI: 10.1091/mbc.e14-01-0007] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Ewing sarcoma is the second-most-common bone cancer in children. Driven by an oncogenic chromosomal translocation that results in the expression of an aberrant transcription factor, EWS/FLI, the disease is typically aggressive and micrometastatic upon presentation. Silencing of EWS/FLI in patient-derived tumor cells results in the altered expression of hundreds to thousands of genes and is accompanied by dramatic morphological changes in cytoarchitecture and adhesion. Genes encoding focal adhesion, extracellular matrix, and actin regulatory proteins are dominant targets of EWS/FLI-mediated transcriptional repression. Reexpression of genes encoding just two of these proteins, zyxin and α5 integrin, is sufficient to restore cell adhesion and actin cytoskeletal integrity comparable to what is observed when the EWS/FLI oncogene expression is compromised. Using an orthotopic xenograft model, we show that EWS/FLI-induced repression of α5 integrin and zyxin expression promotes tumor progression by supporting anchorage-independent cell growth. This selective advantage is paired with a tradeoff in which metastatic lung colonization is compromised.
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Affiliation(s)
- Aashi Chaturvedi
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112 Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112
| | - Laura M Hoffman
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112 Department of Biology, University of Utah, Salt Lake City, UT 84112
| | | | - Yi-Chun Lin
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112 Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112
| | - Allie H Grossmann
- Department of Pathology, University of Utah, Salt Lake City, UT 84112
| | - R Lor Randall
- Center for Children's Cancer Research, Huntsman Cancer Institute, Division of Pediatric Hematology/Oncology, University of Utah School of Medicine, Salt Lake City, UT 84132 Department of Orthopaedics, Sarcoma Services, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112
| | - Stephen L Lessnick
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112 Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112 Center for Children's Cancer Research, Huntsman Cancer Institute, Division of Pediatric Hematology/Oncology, University of Utah School of Medicine, Salt Lake City, UT 84132
| | - Alana L Welm
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112 Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112
| | - Mary C Beckerle
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112 Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112 Department of Biology, University of Utah, Salt Lake City, UT 84112
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