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Gipson IK, Mandel U, Menon B, Michaud S, Tisdale A, Campos D, Clausen H. Generation and characterization of a monoclonal antibody to the cytoplasmic tail of MUC16. Glycobiology 2017; 27:920-926. [PMID: 28673046 PMCID: PMC6283312 DOI: 10.1093/glycob/cwx054] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/23/2017] [Accepted: 06/05/2017] [Indexed: 12/28/2022] Open
Abstract
MUC16 is a large transmembrane mucin expressed on the apical surfaces of the epithelium covering the ocular surface, respiratory system and female reproductive tract. The transmembrane mucin is overexpressed by ovarian carcinomas, it is one of the most frequently used diagnostic markers for the disease and it is considered a promising target for immunotherapeutic intervention. Immunodetection of the mucin has to date been through antibodies that recognize its exceptionally large ectodomain. Similar to other membrane anchored mucins, MUC16 has a short cytoplasmic tail (CT), but studies of the biological relevance of the C-terminal domain of MUC16 has been limited by lack of availability of monoclonal antibodies that recognize the native CT. Here, we report the development of a novel monoclonal antibody to the CT region of the molecule that recognizes native MUC16 and its enzymatically released CT region. The antibody is useful for immunoprecipitation of the released CT domain as demonstrated with the OVCAR3 ovarian cancer cell line and can be used for detailed cytolocalization in cells as well as in frozen sections of ocular surface and uterine epithelium.
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Affiliation(s)
- Ilene K Gipson
- Department of Ophthalmology Harvard Medical School, Schepens Eye Research Institute/MEEI, Boston, MA 02114, USA
| | - Ulla Mandel
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine and School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen N, Denmark
| | - Balaraj Menon
- Department of Ophthalmology Harvard Medical School, Schepens Eye Research Institute/MEEI, Boston, MA 02114, USA
| | - Sandra Michaud
- Department of Ophthalmology Harvard Medical School, Schepens Eye Research Institute/MEEI, Boston, MA 02114, USA
| | - Ann Tisdale
- Department of Ophthalmology Harvard Medical School, Schepens Eye Research Institute/MEEI, Boston, MA 02114, USA
| | - Diana Campos
- Instituto de Investigação e Inovação e Saúde, Universidade do Porto, Rua Júlio Amaral de Carvalho 45, Porto, Portugal
- IPATIMUP, Institute of Molecular Pathology and Immunology of the University of Porto, Rua Júlio Amaral de Carvalho 45, Porto, Portugal
| | - Henrik Clausen
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine and School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen N, Denmark
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Zhong L, Yuan L, Rao Y, Li Z, Gu Q, Long Y, Zhang X, Cui Z, Xu Y, Dai H. Investigation of effect of 17α-ethinylestradiol on vigilin expression using an isolated recombinant antibody. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 156:1-9. [PMID: 25112681 DOI: 10.1016/j.aquatox.2014.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 07/18/2014] [Accepted: 07/19/2014] [Indexed: 06/03/2023]
Abstract
Vigilin, a highly conserved protein from yeast to mammals, is a multifunctional protein in eukaryotic organisms. One biological function of vigilin is to stabilize the expression level of vitellogenin (VTG). This study aimed to develop vigilin as a new estrogen-inducible biomarker that correlates with the widely applied estrogen-inducible biomarker VTG and expand the ability to detect it in various species. Here, a recombinant monoclonal antibody with high specificity against the conserved C-terminal region of vigilin from zebrafish (Danio rerio) was successfully isolated from a phage display antibody library and found to recognize vigilin proteins from multiple vertebrate species. The effect of 17α-ethinylestradiol (EE2) on vigilin expression in the liver of zebrafish and juvenile crucian carp (Carassius auratus) was investigated. Although vigilin mRNA was expressed in all tissues analyzed from male zebrafish, vigilin protein was detected exclusively in the testis of male zebrafish, as well as the liver of female zebrafish and juvenile crucian carp at a lower level without exposure to EE2. Significant induction of vigilin mRNA by exposure to EE2 was observed in the liver and testis of male zebrafish, even at a low dose of 6.25 ng/L (21.09 pmol/L). In Hela cells, the expression of vigilin coincided with high protein synthesis activity but not dose-dependently by EE2 exposure. Therefore, the recombinant antibody may be used as a detection tool to screen for mammalian cell lines or organs with estrogen-inducible expression of vigilin.
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Affiliation(s)
- Liqiao Zhong
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China
| | - Li Yuan
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China
| | - Yu Rao
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China
| | - Zhouquan Li
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100039, PR China
| | - Qilin Gu
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100039, PR China
| | - Yong Long
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China
| | - Xiaohua Zhang
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China.
| | - Zongbin Cui
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China
| | - Ying Xu
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China
| | - Heping Dai
- State Key Laboratory of Fresh water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 7 Southern East Lake Road, Wuhan 430072, PR China.
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ZHANG ZHONGLIN, ZHANG JIFA, YUAN YUFENG, HE YUEMING, LIU QUANYAN, MAO XIAOWEN, AI YONGBIAO, LIU ZHISU. Suppression of angiogenesis and tumor growth in vitro and in vivo using an anti-angiopoietin-2 single-chain antibody. Exp Ther Med 2014; 7:543-552. [PMID: 24520243 PMCID: PMC3919851 DOI: 10.3892/etm.2014.1476] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Accepted: 12/11/2013] [Indexed: 12/15/2022] Open
Abstract
Hepatocellular carcinomas (HCCs) are tumors with a highly developed vascular architecture. HCC cells require access to blood vessels for growth and metastasis; therefore, the inhibition of angiogenesis represents a potential therapeutic target for HCC that may reduce the mortality and morbidity from HCC. Various attempts to develop an anti-angiogenic therapy have been made in past decades; however, modest results have been achieved in clinical trials and the challenge of HCC treatment remains. Single-chain antibodies (scFv) are characterized by low molecular weight, low immunogenicity, high penetration and a short half-life, and are easy to produce on a large scale by genetic engineering. Accordingly, an scFv against a specific angiogenic regulator, such as angiopoietin (Ang), may be a promising anti-angiogenic therapy for HCC. Our previous study indicated that an imbalanced expression of angiopoietin-2 (Ang-2) vs. angiopoietin-1 (Ang-1) in HCCs contributes to initiation of neovascularization and promotes the angiogenesis and progression of HCCs. Therefore, we suggest that specific Ang-2-targeting interventions may be valuable in the treatment of HCC via remodeling the neovascular network and changing the tumor microenvironment. In this study, a prokaryotic expression vector of Ang-2 was constructed and purified human Ang-2 protein was isolated. An scFv against human Ang-2 (scFv-Ang2) was identified and purified via phage display technology, and the effects of scFv-Ang2 in vitro and in vivo on HCC in nude mice were evaluated. The results show that scFv-Ang2 inhibits vascular endothelial growth factor (VEGF) and Ang-2 induces the proliferation, migration and tubule formation of human umbilical vein endothelial cells (HUVECs) in vitro. In the in vivo assay, statistical indices, including tumor weight and volume, metastases to lungs, CD31 expression and the microvessel density (MVD) count in the scFv-Ang2-treated group of mice were significantly lower than those in the control group (P<0.05). In conclusion, the successfully generated scFv-Ang2 showed significant inhibitory effects on the angiogenesis and tumor growth of human HCC in vitro and in vivo.
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Affiliation(s)
- ZHONG-LIN ZHANG
- Hepatobiliary & Pancreatic Unit, Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - JI-FA ZHANG
- Department of General Surgery, Branch Hospital in Fengxian of Shanghai No. 6 People’s Hospital, Shanghai 201406, P.R. China
| | - YU-FENG YUAN
- Hepatobiliary & Pancreatic Unit, Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - YUE-MING HE
- Hepatobiliary & Pancreatic Unit, Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - QUAN-YAN LIU
- Hepatobiliary & Pancreatic Unit, Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - XIAO-WEN MAO
- Hepatobiliary & Pancreatic Unit, Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - YONG-BIAO AI
- Hepatobiliary & Pancreatic Unit, Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - ZHI-SU LIU
- Hepatobiliary & Pancreatic Unit, Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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