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Salem GM, Galula JU, Wu SR, Liu JH, Chen YH, Wang WH, Wang SF, Song CS, Chen FC, Abarientos AB, Chen GW, Wang CI, Chao DY. Antibodies from dengue patients with prior exposure to Japanese encephalitis virus are broadly neutralizing against Zika virus. Commun Biol 2024; 7:15. [PMID: 38267569 PMCID: PMC10808242 DOI: 10.1038/s42003-023-05661-w] [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: 10/07/2023] [Accepted: 12/01/2023] [Indexed: 01/26/2024] Open
Abstract
Exposure to multiple mosquito-borne flaviviruses within a lifetime is not uncommon; however, how sequential exposures to different flaviviruses shape the cross-reactive humoral response against an antigen from a different serocomplex has yet to be explored. Here, we report that dengue-infected individuals initially primed with the Japanese encephalitis virus (JEV) showed broad, highly neutralizing potencies against Zika virus (ZIKV). We also identified a rare class of ZIKV-cross-reactive human monoclonal antibodies with increased somatic hypermutation and broad neutralization against multiple flaviviruses. One huMAb, K8b, binds quaternary epitopes with heavy and light chains separately interacting with overlapping envelope protein dimer units spanning domains I, II, and III through cryo-electron microscopy and structure-based mutagenesis. JEV virus-like particle immunization in mice further confirmed that such cross-reactive antibodies, mainly IgG3 isotype, can be induced and proliferate through heterologous dengue virus (DENV) serotype 2 virus-like particle stimulation. Our findings highlight the role of prior immunity in JEV and DENV in shaping the breadth of humoral response and provide insights for future vaccination strategies in flavivirus-endemic countries.
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Affiliation(s)
- Gielenny M Salem
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung Hsing University, Taichung City, 402, Taiwan
| | - Jedhan Ucat Galula
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung Hsing University, Taichung City, 402, Taiwan
| | - Shang-Rung Wu
- Institute of Oral Medicine, School of Dentistry, College of Medicine, National Cheng Kung University, Tainan City, 701, Taiwan
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan City, 701, Taiwan
| | - Jyung-Hurng Liu
- Graduate Institute of Genomics and Bioinformatics, College of Life Sciences, National Chung Hsing University, Taichung City, 40227, Taiwan
| | - Yen-Hsu Chen
- School of Medicine, College of Medicine, National Sun Yat-Sen University, Kaohsiung City, 80424, Taiwan
- Center for Tropical Medicine and Infectious Disease Research, Kaohsiung Medical University, Kaohsiung City, 80708, Taiwan
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung City, 80708, Taiwan
| | - Wen-Hung Wang
- School of Medicine, College of Medicine, National Sun Yat-Sen University, Kaohsiung City, 80424, Taiwan
- Center for Tropical Medicine and Infectious Disease Research, Kaohsiung Medical University, Kaohsiung City, 80708, Taiwan
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung City, 80708, Taiwan
| | - Sheng-Fan Wang
- Center for Tropical Medicine and Infectious Disease Research, Kaohsiung Medical University, Kaohsiung City, 80708, Taiwan
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung City, 80708, Taiwan
| | - Cheng-Sheng Song
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung Hsing University, Taichung City, 402, Taiwan
| | - Fan-Chi Chen
- Doctoral Program in Microbial Genomics, National Chung Hsing University and Academia Sinica, Taichung City, 402, Taiwan
| | - Adrian B Abarientos
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung Hsing University, Taichung City, 402, Taiwan
| | - Guan-Wen Chen
- Institute of Oral Medicine, School of Dentistry, College of Medicine, National Cheng Kung University, Tainan City, 701, Taiwan
| | - Cheng-I Wang
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Immunos, Singapore, 138648, Singapore
| | - Day-Yu Chao
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung Hsing University, Taichung City, 402, Taiwan.
- Doctoral Program in Microbial Genomics, National Chung Hsing University and Academia Sinica, Taichung City, 402, Taiwan.
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung City, 402, Taiwan.
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2
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Yeh PY, Chen JY, Shen MY, Che TF, Lim SC, Wang J, Tsai WS, Frank CW, Huang CJ, Chang YC. Liposome-tethered supported lipid bilayer platform for capture and release of heterogeneous populations of circulating tumor cells. J Mater Chem B 2023; 11:8159-8169. [PMID: 37313622 DOI: 10.1039/d3tb00547j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Because of scarcity, vulnerability, and heterogeneity in the population of circulating tumor cells (CTCs), the CTC isolation system relying on immunoaffinity interaction exhibits inconsistent efficiencies for all types of cancers and even CTCs with different phenotypes in individuals. Moreover, releasing viable CTCs from an isolation system is of importance for molecular analysis and drug screening in precision medicine, which remains a challenge for current systems. In this work, a new CTC isolation microfluidic platform was developed and contains a coating of the antibody-conjugated liposome-tethered-supported lipid bilayer in a developed chaotic-mixing microfluidic system, referred to as the "LIPO-SLB" platform. The biocompatible, soft, laterally fluidic, and antifouling properties of the LIPO-SLB platform offer high CTC capture efficiency, viability, and selectivity. We successfully demonstrated the capability of the LIPO-SLB platform to recapitulate different cancer cell lines with different antigen expression levels. In addition, the captured CTCs in the LIPO-SLB platform can be detached by air foam to destabilize the physically assembled bilayer structures due to a large water/air interfacial area and strong surface tension. More importantly, the LIPO-SLB platform was constructed and used for the verification of clinical samples from 161 patients with different primary cancer types. The mean values of both single CTCs and CTC clusters correlated well with the cancer stages. Moreover, a considerable number of CTCs were isolated from patients' blood samples in the early/localized stages. The clinical validation demonstrated the enormous potential of the universal LIPO-SLB platform as a tool for prognostic and predictive purposes in precision medicine.
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Affiliation(s)
- Po-Ying Yeh
- Genomics Research Center, Academia Sinica, 128, Sec 2, Academic Rd., Nankang, Taipei 115, Taiwan.
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Jia-Yang Chen
- Genomics Research Center, Academia Sinica, 128, Sec 2, Academic Rd., Nankang, Taipei 115, Taiwan.
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Mo-Yuan Shen
- Genomics Research Center, Academia Sinica, 128, Sec 2, Academic Rd., Nankang, Taipei 115, Taiwan.
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Ting-Fang Che
- Genomics Research Center, Academia Sinica, 128, Sec 2, Academic Rd., Nankang, Taipei 115, Taiwan.
| | - Syer Choon Lim
- Genomics Research Center, Academia Sinica, 128, Sec 2, Academic Rd., Nankang, Taipei 115, Taiwan.
| | - Jocelyn Wang
- The College, The University of Chicago, Chicago, IL 60637, USA
| | - Wen-Sy Tsai
- Division of Colon and Rectal Surgery, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
- Graduate Institute of Clinical Medical Science, Chang Gung University, Linkou, Taoyuan, Taiwan
| | - Curtis W Frank
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Chun-Jen Huang
- Department of Chemical & Materials Engineering, and NCU-Covestro Research Center, National Central University, Jhong-Li, Taoyuan 320, Taiwan.
- R&D Center for Membrane Technology, Chung Yuan Christian University, 200 Chung Pei Rd., Chung-Li City 32023, Taiwan
| | - Ying-Chih Chang
- Genomics Research Center, Academia Sinica, 128, Sec 2, Academic Rd., Nankang, Taipei 115, Taiwan.
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
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3
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Hsu FF, Liang KH, Kumari M, Chen WY, Lin HT, Cheng CM, Tao MH, Wu HC. An efficient approach for SARS-CoV-2 monoclonal antibody production via modified mRNA-LNP immunization. Int J Pharm 2022; 627:122256. [PMID: 36198358 PMCID: PMC9526872 DOI: 10.1016/j.ijpharm.2022.122256] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 09/23/2022] [Accepted: 09/27/2022] [Indexed: 12/05/2022]
Abstract
Throughout the COVID-19 pandemic, many prophylactic and therapeutic drugs have been evaluated and introduced. Among these treatments, monoclonal antibodies (mAbs) that bind to and neutralize SARS-CoV-2 virus have been applied as complementary and alternative treatments to vaccines. Although different methodologies have been utilized to produce mAbs, traditional hybridoma fusion technology is still commonly used for this purpose due to its unmatched performance record. In this study, we coupled the hybridoma fusion strategy with mRNA-lipid nanoparticle (LNP) immunization. This time-saving approach can circumvent biological and technical hurdles, such as difficult-to-express membrane proteins, antigen instability, and the lack of posttranslational modifications on recombinant antigens. We used mRNA-LNP immunization and hybridoma fusion technology to generate mAbs against the receptor binding domain (RBD) of SARS-CoV-2 spike (S) protein. Compared with traditional protein-based immunization approaches, inoculation of mice with RBD mRNA-LNP induced higher titers of serum antibodies and markedly increased serum neutralizing activity. The mAbs we obtained can bind to SARS-CoV-2 RBDs from several variants. Notably, RBD-mAb-3 displayed particularly high binding affinities and neutralizing potencies against both Alpha and Delta variants. In addition to introducing specific mAbs against SARS-CoV-2, our data generally demonstrate that mRNA-LNP immunization may be useful to quickly generate highly functional mAbs against emerging infectious diseases.
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Affiliation(s)
- Fu-Fei Hsu
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei 11529, Taiwan
| | - Kang-Hao Liang
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei 11529, Taiwan
| | - Monika Kumari
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Wan-Yu Chen
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Hsiu-Ting Lin
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Chao-Min Cheng
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei 11529, Taiwan
| | - Mi-Hua Tao
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei 11529, Taiwan; Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Han-Chung Wu
- Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei 11529, Taiwan; Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan.
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4
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Chen JY, Chou HH, Lim SC, Huang YJ, Lai KC, Guo CL, Tung CY, Su CT, Wang J, Liu E, Han HF, Yeh PY, Hu CM, Dunn AR, Frank CW, Wu YC, Yang MH, Chang YC. Multiomic characterization and drug testing establish circulating tumor cells as an ex vivo tool for personalized medicine. iScience 2022; 25:105081. [PMID: 36204272 PMCID: PMC9529671 DOI: 10.1016/j.isci.2022.105081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/06/2022] [Accepted: 08/31/2022] [Indexed: 11/19/2022] Open
Abstract
Matching the treatment to an individual patient’s tumor state can increase therapeutic efficacy and reduce tumor recurrence. Circulating tumor cells (CTCs) derived from solid tumors are promising subjects for theragnostic analysis. To analyze how CTCs represent tumor states, we established cell lines from CTCs, primary and metastatic tumors from a mouse model and provided phenotypic and multiomic analyses of these cells. CTCs and metastatic cells, but not primary tumor cells, shared stochastic mutations and similar hypomethylation levels at transcription start sites. CTCs and metastatic tumor cells shared a hybrid epithelial/mesenchymal transcriptome state with reduced adhesive and enhanced mobilization characteristics. We tested anti-cancer drugs on tumor cells from a metastatic breast cancer patient. CTC responses mirrored the impact of drugs on metastatic rather than primary tumors. Our multiomic and clinical anti-cancer drug response results reveal that CTCs resemble metastatic tumors and establish CTCs as an ex vivo tool for personalized medicine. Primary, CTC and metastatic cell lines from mouse models were directly compared Multiomic and phenotypic data indicate circulating cells resemble metastatic cells CTCs and metastasis tumors from a patient similarly respond to anti-cancer drugs CTCs are thus potentially useful for screening individual patient drug responses
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Affiliation(s)
- Jia-Yang Chen
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
- National Laboratory Animal Center, National Applied Research Laboratories, Taipei 115, Taiwan
| | - Hsu-Huan Chou
- Department of General Surgery, Chang-Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Syer Choon Lim
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Yen-Jang Huang
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
- National Laboratory Animal Center, National Applied Research Laboratories, Taipei 115, Taiwan
| | - Kuan-Chen Lai
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
| | - Chin-Lin Guo
- Institute of Physics, Academia Sinica, Taipei 115, Taiwan
| | - Chien-Yi Tung
- Cancer Progression Research Center, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
| | | | - Jocelyn Wang
- The College, The University of Chicago, Chicago, IL 60637, USA
| | - Edward Liu
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Hsiao-Fen Han
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei 106, Taiwan
| | - Po-Ying Yeh
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Chun-Mei Hu
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Alexander R. Dunn
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Curtis W. Frank
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Yi-Chun Wu
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei 106, Taiwan
- Center for Computational and Systems Biology, National Taiwan University, Taipei 106, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
- Corresponding author
| | - Muh-Hwa Yang
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
- Cancer Progression Research Center, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 112, Taiwan
- Corresponding author
| | - Ying-Chih Chang
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
- National Laboratory Animal Center, National Applied Research Laboratories, Taipei 115, Taiwan
- Biomedical Translational Research Center, Academia Sinica, Taipei 115, Taiwan
- Precision Health and Integrated Diagnostics Center, Stanford University, Stanford, CA 94305, USA
- Corresponding author
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5
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Edwardson TGW, Levasseur MD, Tetter S, Steinauer A, Hori M, Hilvert D. Protein Cages: From Fundamentals to Advanced Applications. Chem Rev 2022; 122:9145-9197. [PMID: 35394752 DOI: 10.1021/acs.chemrev.1c00877] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Proteins that self-assemble into polyhedral shell-like structures are useful molecular containers both in nature and in the laboratory. Here we review efforts to repurpose diverse protein cages, including viral capsids, ferritins, bacterial microcompartments, and designed capsules, as vaccines, drug delivery vehicles, targeted imaging agents, nanoreactors, templates for controlled materials synthesis, building blocks for higher-order architectures, and more. A deep understanding of the principles underlying the construction, function, and evolution of natural systems has been key to tailoring selective cargo encapsulation and interactions with both biological systems and synthetic materials through protein engineering and directed evolution. The ability to adapt and design increasingly sophisticated capsid structures and functions stands to benefit the fields of catalysis, materials science, and medicine.
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Affiliation(s)
| | | | - Stephan Tetter
- Laboratory of Organic Chemistry, ETH Zurich, 8093 Zurich, Switzerland
| | - Angela Steinauer
- Laboratory of Organic Chemistry, ETH Zurich, 8093 Zurich, Switzerland
| | - Mao Hori
- Laboratory of Organic Chemistry, ETH Zurich, 8093 Zurich, Switzerland
| | - Donald Hilvert
- Laboratory of Organic Chemistry, ETH Zurich, 8093 Zurich, Switzerland
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6
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Li HJ, Ke FY, Lin CC, Lu MY, Kuo YH, Wang YP, Liang KH, Lin SC, Chang YH, Chen HY, Yang PC, Wu HC. ENO1 Promotes Lung Cancer Metastasis via HGFR and WNT Signaling-Driven Epithelial-to-Mesenchymal Transition. Cancer Res 2021; 81:4094-4109. [PMID: 34145039 DOI: 10.1158/0008-5472.can-20-3543] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 01/06/2021] [Accepted: 06/15/2021] [Indexed: 11/16/2022]
Abstract
ENO1 (α-enolase) expression is significantly correlated with reduced survival and poor prognosis in many cancer types, including lung cancer. However, the function of ENO1 in carcinogenesis remains elusive. In this study, we found that high expression of ENO1 is present in metastatic lung cancer cell lines and malignant tumors and is associated with poor overall survival of patients with lung cancer. Knockdown of ENO1 decreased cancer cell proliferation and invasiveness, whereas overexpression of ENO1 enhanced these processes. Moreover, ENO1 expression promoted tumor growth in orthotopic models and enhanced lung tumor metastasis in tail-vein injection models. These effects were mediated by upregulation of mesenchymal markers N-cadherin and vimentin and the epithelial-to-mesenchymal transition regulator SLUG, along with concurrent downregulation of E-cadherin. Mechanistically, ENO1 interacted with hepatocyte growth factor receptor (HGFR) and activated HGFR and Wnt signaling via increased phosphorylation of HGFR and the Wnt coreceptor LRP5/6. Activation of these signaling axes decreased GSK3β activity via Src-PI3K-AKT signaling and inactivation of the β-catenin destruction complex to ultimately upregulate SLUG and β-catenin. In addition, we generated a chimeric anti-ENO1 mAb (chENO1-22) that can decrease cancer cell proliferation and invasion. chENO1-22 attenuated cancer cell invasion by inhibiting ENO1-mediated GSK3β inactivation to promote SLUG protein ubiquitination and degradation. Moreover, chENO1-22 prevented lung tumor metastasis and prolonged survival in animal models. Taken together, these findings illuminate the molecular mechanisms underlying the function of ENO1 in lung cancer metastasis and support the therapeutic potential of a novel antibody targeting ENO1 for treating lung cancer. SIGNIFICANCE: This study shows that ENO1 promotes lung cancer metastasis via HGFR and WNT signaling and introduces a novel anti-ENO1 antibody for potential therapeutic use in lung cancer.
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Affiliation(s)
- Hsin-Jung Li
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Feng-Yi Ke
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Chia-Ching Lin
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Mei-Yi Lu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Yi-Huei Kuo
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Yi-Ping Wang
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan.,Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Kang-Hao Liang
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan.,Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, Taiwan
| | - Shin-Chang Lin
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan.,Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, Taiwan
| | - Ya-Hsuan Chang
- Institute of Statistical Science, Academia Sinica, Taipei, Taiwan
| | - Hsuan-Yu Chen
- Institute of Statistical Science, Academia Sinica, Taipei, Taiwan
| | - Pan-Chyr Yang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Han-Chung Wu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan. .,Biomedical Translation Research Center (BioTReC), Academia Sinica, Taipei, Taiwan
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7
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Shen WF, Galula JU, Liu JH, Liao MY, Huang CH, Wang YC, Wu HC, Liang JJ, Lin YL, Whitney MT, Chang GJJ, Chen SR, Wu SR, Chao DY. Epitope resurfacing on dengue virus-like particle vaccine preparation to induce broad neutralizing antibody. eLife 2018; 7:38970. [PMID: 30334522 PMCID: PMC6234032 DOI: 10.7554/elife.38970] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 10/18/2018] [Indexed: 12/25/2022] Open
Abstract
Dengue fever is caused by four different serotypes of dengue virus (DENV) which is the leading cause of worldwide arboviral diseases in humans. Virus-like particles (VLPs) containing flavivirus prM/E proteins have been demonstrated to be a potential vaccine candidate; however, the structure of dengue VLP is poorly understood. Herein VLP derived from DENV serotype-2 were engineered becoming highly matured (mD2VLP) and showed variable size distribution with diameter of ~31 nm forming the major population under cryo-electron microscopy examination. Furthermore, mD2VLP particles of 31 nm diameter possess a T = 1 icosahedral symmetry with a groove located within the E-protein dimers near the 2-fold vertices that exposed highly overlapping, cryptic neutralizing epitopes. Mice vaccinated with mD2VLP generated higher cross-reactive (CR) neutralization antibodies (NtAbs) and were fully protected against all 4 serotypes of DENV. Our results highlight the potential of ‘epitope-resurfaced’ mature-form D2VLPs in inducing quaternary structure-recognizing broad CR NtAbs to guide future dengue vaccine design.
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Affiliation(s)
- Wen-Fan Shen
- Microbial Genomics Ph.D. Program, National Chung Hsing University and Academia Sinica, Taichung City, Taiwan
| | - Jedhan Ucat Galula
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung-Hsing University, Taichung City, Taiwan
| | - Jyung-Hurng Liu
- Institute of Genomics and Bioinformatics, College of Life Science, National Chung-Hsing University, Taichung City, Taiwan
| | - Mei-Ying Liao
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung-Hsing University, Taichung City, Taiwan
| | - Cheng-Hao Huang
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung-Hsing University, Taichung City, Taiwan
| | - Yu-Chun Wang
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung-Hsing University, Taichung City, Taiwan
| | - Han-Chung Wu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Jian-Jong Liang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yi-Ling Lin
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Matthew T Whitney
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States
| | - Gwong-Jen J Chang
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States
| | - Sheng-Ren Chen
- Institute of Oral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Shang-Rung Wu
- Institute of Oral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Day-Yu Chao
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung-Hsing University, Taichung City, Taiwan
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8
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Yeh PY, Chen YR, Wang CF, Chang YC. Promoting Multivalent Antibody–Antigen Interactions by Tethering Antibody Molecules on a PEGylated Dendrimer-Supported Lipid Bilayer. Biomacromolecules 2018; 19:426-437. [DOI: 10.1021/acs.biomac.7b01515] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Po-Ying Yeh
- Genomics Research
Center, Academia Sinica, 128, Sec 2, Academic Road, Nankang, Taipei 115, Taiwan
- Department of Chemical
Engineering, Stanford University, Stanford, California 94305, United States
| | - Yih-Ruey Chen
- Genomics Research
Center, Academia Sinica, 128, Sec 2, Academic Road, Nankang, Taipei 115, Taiwan
| | - Chien-Fang Wang
- Genomics Research
Center, Academia Sinica, 128, Sec 2, Academic Road, Nankang, Taipei 115, Taiwan
| | - Ying-Chih Chang
- Genomics Research
Center, Academia Sinica, 128, Sec 2, Academic Road, Nankang, Taipei 115, Taiwan
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9
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Chen WH, Chou FP, Wang YK, Huang SC, Cheng CH, Wu TK. Characterization and epitope mapping of Dengue virus type 1 specific monoclonal antibodies. Virol J 2017; 14:189. [PMID: 28969658 PMCID: PMC5625772 DOI: 10.1186/s12985-017-0856-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 09/22/2017] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Dengue virus (DV) infection causes a spectrum of clinical diseases ranging from dengue fever to a life-threatening dengue hemorrhagic fever. Four distinct serotypes (DV1-4), which have similar genome sequences and envelope protein (E protein) antigenic properties, were divided. Among these 4 serotypes, DV1 usually causes predominant infections and fast diagnosis and effective treatments are urgently required to prevent further hospitalization and casualties. METHODS To develop antibodies specifically targeting and neutralizing DV1, we immunized mice with UV-inactivated DV1 viral particles and recombinant DV1 E protein from residue 1 to 395 (E395), and then generated 12 anti-E monoclonal antibodies (mAbs) as the candidates for a series of characterized assays such as ELISA, dot blot, immunofluorescence assay, western blot, and foci forming analyses. RESULTS Among the mAbs, 10 out of 12 showed cross-reactivity to four DV serotypes as well as Japanese encephalitis virus (JEV) in different cross-reactivity patterns. Two particular mAbs, DV1-E1 and DV1-E2, exhibited strong binding specificity and neutralizing activity against DV1 and showed no cross-reactivity to DV2, DV3, DV4 or JEV-infected cells as characterized by ELISA, dot blot, immunofluorescence assay, western blot, and foci forming analyses. Using peptide coated indirect ELISA, we localized the neutralizing determinants of the strongly inhibitory mAbs to a sequence-unique epitope on the later-ridge of domain III of the DV1 E protein, centered near residues T346 and D360 (346TQNGRLITANPIVTD360). Interestingly, the amino acid sequence of the epitope region is highly conserved among different genotypes of DV1 but diverse from DV2, DV3, DV4 serotypes and other flaviviruses. CONCLUSIONS Our results showed two selected mAbs DV1-E1 and DV1-E2 can specifically target and significantly neutralize DV1. With further research these two mAbs might be applied in the development of DV1 specific serologic diagnosis and used as a feasible treatment option for DV1 infection. The identification of DV1 mAbs epitope with key residues can also provide vital information for vaccine design.
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Affiliation(s)
- Wen-Hung Chen
- Department of Biological Science and Technology, National Chiao Tung University, Hsin-Chu, 30068 Taiwan, Republic of China
| | - Feng-Pai Chou
- Department of Biological Science and Technology, National Chiao Tung University, Hsin-Chu, 30068 Taiwan, Republic of China
| | - Yu-Kuo Wang
- Department of Biological Science and Technology, National Chiao Tung University, Hsin-Chu, 30068 Taiwan, Republic of China
| | - Sheng-Cih Huang
- Department of Biological Science and Technology, National Chiao Tung University, Hsin-Chu, 30068 Taiwan, Republic of China
| | - Chuan-Hung Cheng
- Department of Biological Science and Technology, National Chiao Tung University, Hsin-Chu, 30068 Taiwan, Republic of China
| | - Tung-Kung Wu
- Department of Biological Science and Technology, National Chiao Tung University, Hsin-Chu, 30068 Taiwan, Republic of China
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Amin N, Pupo M, Aguilar A, Vázquez S, Caballero Y, Ochoa R, Guzmán MG, Acosta A. Recognition of a multiple antigen peptide containing sequence from mimotope of the dengue type 3 virus NS4B protein by human antibodies. ASIAN PAC J TROP MED 2016; 9:130-3. [PMID: 26919941 DOI: 10.1016/j.apjtm.2016.01.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 12/20/2015] [Accepted: 12/30/2015] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE To evaluate the recognition of NS4B mimotope, as multiple antigen peptide (MAP), by dengue antibodies presents in serum samples from patients with different serotype infections. METHODS A MAP containing mimotope sequence was synthesized and used to evaluate the recognition of NS4B mimotope as MAP by a panel of 66 human sera from dengue cases by an indirect ELISA assay. RESULTS The MAP differentiated between sera from dengue viruses infected patients and sera from healthy individuals and the best reactivity was shown by serum from dengue type 3 virus patients. The recognition was more intense with serum from patients with secondary infection. CONCLUSIONS The findings suggest the potential use of NS4B mimotope on the development of a multi-epitope diagnostic tool. These results are important for further immunogenicity studies.
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Affiliation(s)
- Nevis Amin
- Implementation and Design of Clinical Trials, Clinical Research and Impact Evaluation Direction, Finlay Institute, 11600, Havana, Cuba.
| | - Maritza Pupo
- 'Pedro Kourí' Tropical Medicine Institute (IPK), PAHO/WHO Collaborating Center for the Study of Dengue and its Vector, 17100, Havana, Cuba
| | - Alicia Aguilar
- Implementation and Design of Clinical Trials, Clinical Research and Impact Evaluation Direction, Finlay Institute, 11600, Havana, Cuba
| | - Susana Vázquez
- 'Pedro Kourí' Tropical Medicine Institute (IPK), PAHO/WHO Collaborating Center for the Study of Dengue and its Vector, 17100, Havana, Cuba
| | - Yamira Caballero
- 'Pedro Kourí' Tropical Medicine Institute (IPK), PAHO/WHO Collaborating Center for the Study of Dengue and its Vector, 17100, Havana, Cuba
| | - Rolando Ochoa
- Implementation and Design of Clinical Trials, Clinical Research and Impact Evaluation Direction, Finlay Institute, 11600, Havana, Cuba
| | - María G Guzmán
- 'Pedro Kourí' Tropical Medicine Institute (IPK), PAHO/WHO Collaborating Center for the Study of Dengue and its Vector, 17100, Havana, Cuba
| | - Armando Acosta
- Implementation and Design of Clinical Trials, Clinical Research and Impact Evaluation Direction, Finlay Institute, 11600, Havana, Cuba
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Wu CH, Liu IJ, Lu RM, Wu HC. Advancement and applications of peptide phage display technology in biomedical science. J Biomed Sci 2016; 23:8. [PMID: 26786672 PMCID: PMC4717660 DOI: 10.1186/s12929-016-0223-x] [Citation(s) in RCA: 203] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Accepted: 01/11/2016] [Indexed: 12/25/2022] Open
Abstract
Combinatorial phage library is a powerful research tool for high-throughput screening of protein interactions. Of all available molecular display techniques, phage display has proven to be the most popular approach. Screening phage-displayed random peptide libraries is an effective means of identifying peptides that can bind target molecules and regulate their function. Phage-displayed peptide libraries can be used for (i) B-cell and T-cell epitope mapping, (ii) selection of bioactive peptides bound to receptors or proteins, disease-specific antigen mimics, peptides bound to non-protein targets, cell-specific peptides, or organ-specific peptides, and (iii) development of peptide-mediated drug delivery systems and other applications. Targeting peptides identified using phage display technology may be useful for basic research and translational medicine. In this review article, we summarize the latest technological advancements in the application of phage-displayed peptide libraries to applied biomedical sciences.
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Affiliation(s)
- Chien-Hsun Wu
- Institute of Cellular and Organismic Biology, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, 11529, Taiwan
| | - I-Ju Liu
- Institute of Cellular and Organismic Biology, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, 11529, Taiwan
| | - Ruei-Min Lu
- Institute of Cellular and Organismic Biology, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, 11529, Taiwan
| | - Han-Chung Wu
- Institute of Cellular and Organismic Biology, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, 11529, Taiwan.
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12
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Establishment and Comparison of Two Different Diagnostic Platforms for Detection of DENV1 NS1 Protein. Int J Mol Sci 2015; 16:27850-64. [PMID: 26610481 PMCID: PMC4661927 DOI: 10.3390/ijms161126069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 11/16/2015] [Accepted: 11/17/2015] [Indexed: 12/24/2022] Open
Abstract
Dengue virus (DENV) infection is currently at pandemic levels, with populations in tropical and subtropical regions at greatest risk of infection. Early diagnosis and management remain the cornerstone for good clinical outcomes, thus efficient and accurate diagnostic technology in the early stage of the disease is urgently needed. Serotype-specific monoclonal antibodies (mAbs) against the DENV1 nonstructural protein 1 (NS1), DA12-4, DA13-2, and DA15-3, which were recently generated using the hybridoma technique, are suitable for use in diagnostic platforms. Immunofluorescence assay (IFA), enzyme-linked immunosorbent assay (ELISA) and Western blot analysis further confirmed the serotype specificity of these three monoclonal antibodies. The ELISA-based diagnostic platform was established using the combination of two highly sensitive mAbs (DA15-3 and DB20-6). The same combination was also used for the flow cytometry-based diagnostic platform. We report here the detection limits of flow cytometry-based and ELISA-based diagnostic platforms using these mAbs to be 0.1 and 1 ng/mL, respectively. The collected clinical patient serum samples were also assayed by these two serotyping diagnostic platforms. The sensitivity and specificity for detecting NS1 protein of DENV1 are 90% and 96%, respectively. The accuracy of our platform for testing clinical samples is more advanced than that of the two commercial NS1 diagnostic platforms. In conclusion, our platforms are suitable for the early detection of NS1 protein in DENV1 infected patients.
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13
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Tang CT, Liao MY, Chiu CY, Shen WF, Chiu CY, Cheng PC, Chang GJJ, Wu HC. Generation of Monoclonal Antibodies against Dengue Virus Type 4 and Identification of Enhancing Epitopes on Envelope Protein. PLoS One 2015; 10:e0136328. [PMID: 26309127 PMCID: PMC4550467 DOI: 10.1371/journal.pone.0136328] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 08/02/2015] [Indexed: 11/18/2022] Open
Abstract
The four serotypes of dengue virus (DENV1-4) pose a serious threat to global health. Cross-reactive and non-neutralizing antibodies enhance viral infection, thereby exacerbating the disease via antibody-dependent enhancement (ADE). Studying the epitopes targeted by these enhancing antibodies would improve the immune responses against DENV infection. In order to investigate the roles of antibodies in the pathogenesis of dengue, we generated a panel of 16 new monoclonal antibodies (mAbs) against DENV4. Using plaque reduction neutralization test (PRNT), we examined the neutralizing activity of these mAbs. Furthermore, we used the in vitro and in vivo ADE assay to evaluate the enhancement of DENV infection by mAbs. The results indicate that the cross-reactive and poorly neutralizing mAbs, DD11-4 and DD18-5, strongly enhance DENV1-4 infection of K562 cells and increase mortality in AG129 mice. The epitope residues of these enhancing mAbs were identified using virus-like particle (VLP) mutants. W212 and E26 are the epitope residues of DD11-4 and DD18-5, respectively. In conclusion, we generated and characterized 16 new mAbs against DENV4. DD11-4 and D18-5 possessed non-neutralizing activities and enhanced viral infection. Moreover, we identified the epitope residues of enhancing mAbs on envelope protein. These results may provide useful information for development of safe dengue vaccine.
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Affiliation(s)
- Chung-Tao Tang
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Mei-Ying Liao
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Chien-Yu Chiu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Wen-Fan Shen
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Chiung-Yi Chiu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Ping-Chang Cheng
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Gwong-Jen J. Chang
- Arbovirus Diseases Branch, Division of Vector-Borne Infectious Diseases, Centers for Disease Control and Prevention, Public Health Service, United States Department of Health and Human Services, Fort Collins, Colorado, United States of America
| | - Han-Chung Wu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
- * E-mail:
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14
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Shen WF, Galula JU, Chang GJJ, Wu HC, King CC, Chao DY. Improving dengue viral antigens detection in dengue patient serum specimens using a low pH glycine buffer treatment. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2015; 50:167-174. [PMID: 26260863 DOI: 10.1016/j.jmii.2015.05.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 04/20/2015] [Accepted: 05/21/2015] [Indexed: 01/15/2023]
Abstract
BACKGROUND/PURPOSES Early diagnosis of dengue virus (DENV) infection to monitor the potential progression to hemorrhagic fever can influence the timely management of dengue-associated severe illness. Nonstructural protein 1 (NS1) antigen detection in acute serum specimens has been widely accepted as an early diagnostic assay for dengue infection; however, lower sensitivity of the NS1 antigen-capture enzyme-linked immunosorbent assay (Ag-ELISA) in secondary dengue viral infection has been reported. METHODS In this study, we developed two forms of Ag-ELISA capable of detecting E-Ag containing virion and virus-like particles, and secreted NS1 (sNS1) antigens, respectively. The temporal kinetics of viral RNA, sNS1, and E-Ag were evaluated based on the in vitro infection experiment. Meanwhile, a panel of 62 DENV-2 infected patients' sera was tested. RESULTS The sensitivity was 3.042 ng/mL and 3.840 ng/mL for sNS1 and E, respectively. The temporal kinetics of the appearance of viral RNA, E, NS1, and infectious virus in virus-infected tissue culture media suggested that viral RNAs and NS1 antigens could be detected earlier than E-Ag and infectious virus. Furthermore, a panel of 62 sera from patients infected by DENV Serotype 2 was tested. Treating clinical specimens with the dissociation buffer increased the detectable level of E from 13% to 92% and NS1 antigens from 40% to 85%. CONCLUSION Inclusion of a low-pH glycine buffer treatment step in the commercially available Ag-ELISA is crucial for clinical diagnosis and E-containing viral particles could be a valuable target for acute DENV diagnosis, similar to NS1 detection.
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Affiliation(s)
- Wen-Fan Shen
- Ph.D. Program in Microbial Genomics, National Chung-Hsing University, Taichung, Taiwan
| | - Jedhan Ucat Galula
- Department of Veterinary Medicine, College of Veterinary Medicine, National Chung-Hsing University, Taichung, Taiwan
| | - Gwong-Jen J Chang
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Han-Chung Wu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, 115, Taiwan
| | - Chwan-Chuen King
- Institute of Epidemiology, School of Public Health, National Taiwan University, Taipei, Taiwan
| | - Day-Yu Chao
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung-Hsing University, Taichung, Taiwan.
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15
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Antibody conjugated supported lipid bilayer for capturing and purification of viable tumor cells in blood for subsequent cell culture. Biomaterials 2013; 34:5191-9. [DOI: 10.1016/j.biomaterials.2013.03.096] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Accepted: 03/29/2013] [Indexed: 01/26/2023]
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A novel platform for virus-like particle-display of flaviviral envelope domain III: induction of Dengue and West Nile virus neutralizing antibodies. Virol J 2013; 10:129. [PMID: 23617954 PMCID: PMC3668303 DOI: 10.1186/1743-422x-10-129] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 03/26/2013] [Indexed: 11/10/2022] Open
Abstract
CD16-RIgE is a chimeric human membrane glycoprotein consisting of the CD16 ectodomain fused to the transmembrane domain and cytoplasmic tail of the gamma chain of the high affinity receptor of IgE (RIgE). Coexpression of CD16-RIgE and HIV-1 Pr55Gag polyprotein precursor (Pr55GagHIV) in insect cells resulted in the incorporation of CD16-RIgE glycoprotein into the envelope of extracellular virus-like particles (VLPs), a phenomenon known as pseudotyping. Taking advantage of this property, we replaced the CD16 ectodomain of CD16-RIgE by the envelope glycoprotein domain III (DIII) of dengue virus serotype 1 (DENV1) or West Nile virus Kunjin (WNVKun). The two resulting chimeric proteins, DIII-DENV1-RIgE and DIII-WNVKun-RIgE, were addressed to the plasma membrane, exposed at the surface of human and insect cells, and incorporated into extracellular VLPs when coexpressed with Pr55GagHIV in insect cells. The DIII domains were accessible at the surface of retroviral VLPs, as shown by their reactivity with specific antibodies, and notably antibodies from patient sera. The DIII-RIgE proteins were found to be incorporated in VLPs made of SIV, MLV, or chimeric MLV-HIV Gag precursors, indicating that DIII-RIgE could pseudotype a wide variety of retroviral VLPs. VLP-displayed DIII were capable of inducing specific neutralizing antibodies against DENV and WNV in mice. Although the neutralization response was modest, our data confirmed the capability of DIII to induce a flavivirus neutralization response, and suggested that our VLP-displayed CD16-RIgE-based platform could be developed as a vaccine vector against different flaviviruses and other viral pathogens.
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Li PC, Liao MY, Cheng PC, Liang JJ, Liu IJ, Chiu CY, Lin YL, Chang GJJ, Wu HC. Development of a humanized antibody with high therapeutic potential against dengue virus type 2. PLoS Negl Trop Dis 2012; 6:e1636. [PMID: 22563515 PMCID: PMC3341331 DOI: 10.1371/journal.pntd.0001636] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 03/20/2012] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Dengue virus (DENV) is a significant public health threat in tropical and subtropical regions of the world. A therapeutic antibody against the viral envelope (E) protein represents a promising immunotherapy for disease control. METHODOLOGY/PRINCIPAL FINDINGS We generated seventeen novel mouse monoclonal antibodies (mAbs) with high reactivity against E protein of dengue virus type 2 (DENV-2). The mAbs were further dissected using recombinant E protein domain I-II (E-DI-II) and III (E-DIII) of DENV-2. Using plaque reduction neutralization test (PRNT) and mouse protection assay with lethal doses of DENV-2, we identified four serotype-specific mAbs that had high neutralizing activity against DENV-2 infection. Of the four, E-DIII targeting mAb DB32-6 was the strongest neutralizing mAb against diverse DENV-2 strains. Using phage display and virus-like particles (VLPs) we found that residue K310 in the E-DIII A-strand was key to mAb DB32-6 binding E-DIII. We successfully converted DB32-6 to a humanized version that retained potency for the neutralization of DENV-2 and did not enhance the viral infection. The DB32-6 showed therapeutic efficacy against mortality induced by different strains of DENV-2 in two mouse models even in post-exposure trials. CONCLUSIONS/SIGNIFICANCE We used novel epitope mapping strategies, by combining phage display with VLPs, to identify the important A-strand epitopes with strong neutralizing activity. This study introduced potential therapeutic antibodies that might be capable of providing broad protection against diverse DENV-2 infections without enhancing activity in humans.
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Affiliation(s)
- Pi-Chun Li
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Mei-Ying Liao
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Ping-Chang Cheng
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Jian-Jong Liang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - I-Ju Liu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Chien-Yu Chiu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Yi-Ling Lin
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Gwong-Jen J. Chang
- Arbovirus Diseases Branch, Division of Vector-Borne Infectious Diseases, Centers for Disease Control and Prevention, Public Health Service, United States Department of Health and Human Services, Fort Collins, Colorado, United States of America
| | - Han-Chung Wu
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
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18
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Lin HE, Tsai WY, Liu IJ, Li PC, Liao MY, Tsai JJ, Wu YC, Lai CY, Lu CH, Huang JH, Chang GJ, Wu HC, Wang WK. Analysis of epitopes on dengue virus envelope protein recognized by monoclonal antibodies and polyclonal human sera by a high throughput assay. PLoS Negl Trop Dis 2012; 6:e1447. [PMID: 22235356 PMCID: PMC3250511 DOI: 10.1371/journal.pntd.0001447] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 11/07/2011] [Indexed: 11/21/2022] Open
Abstract
Background The envelope (E) protein of dengue virus (DENV) is the major target of neutralizing antibodies and vaccine development. While previous studies on domain III or domain I/II alone have reported several epitopes of monoclonal antibodies (mAbs) against DENV E protein, the possibility of interdomain epitopes and the relationship between epitopes and neutralizing potency remain largely unexplored. Methodology/Principal Findings We developed a dot blot assay by using 67 alanine mutants of predicted surface-exposed E residues as a systematic approach to identify epitopes recognized by mAbs and polyclonal sera, and confirmed our findings using a capture-ELISA assay. Of the 12 mouse mAbs tested, three recognized a novel epitope involving residues (Q211, D215, P217) at the central interface of domain II, and three recognized residues at both domain III and the lateral ridge of domain II, suggesting a more frequent presence of interdomain epitopes than previously appreciated. Compared with mAbs generated by traditional protocols, the potent neutralizing mAbs generated by a new protocol recognized multiple residues in A strand or residues in C strand/CC′ loop of DENV2 and DENV1, and multiple residues in BC loop and residues in DE loop, EF loop/F strand or G strand of DENV1. The predominant epitopes of anti-E antibodies in polyclonal sera were found to include both fusion loop and non-fusion residues in the same or adjacent monomer. Conclusions/Significance Our analyses have implications for epitope-specific diagnostics and epitope-based dengue vaccines. This high throughput method has tremendous application for mapping both intra and interdomain epitopes recognized by human mAbs and polyclonal sera, which would further our understanding of humoral immune responses to DENV at the epitope level. Dengue virus is the leading cause of arboviral diseases worldwide. The envelope protein is the major target of neutralizing antibodies and vaccine development. While previous studies have reported several epitopes on envelope protein, the possibility of interdomain epitopes and the relationship of epitopes to neutralizing potency remain unexplored. We developed a high throughput dot blot assay by using 67 alanine mutants of surface-exposed envelope residues as a systematic approach to identify epitopes recognized by mouse monoclonal antibodies and polyclonal human sera. Our results suggested the presence of interdomain epitopes more frequent than previously appreciated. Compared with monoclonal antibodies generated by traditional protocol, the potent neutralizing monoclonal antibodies generated by a new protocol showed several unique features of their epitopes. Moreover, the predominant epitopes of antibodies against envelope protein in polyclonal sera can be identified by this assay. These findings have implications for future development of epitope-specific diagnostics and epitope-based dengue vaccine, and add to our understanding of humoral immune responses to dengue virus at the epitope level.
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Affiliation(s)
- Hong-En Lin
- Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Wen-Yang Tsai
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America
| | - I-Ju Liu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Pi-Chun Li
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Mei-Ying Liao
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Jih-Jin Tsai
- Tropical Medicine Center and Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Chieh Wu
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America
| | - Chih-Yun Lai
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America
| | - Chih-Hsuan Lu
- Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Jyh-Hsiung Huang
- Department of Health, Center for Disease Control, Taipei, Taiwan
| | - Gwong-Jen Chang
- Division of Vector-Borne Diseases, Department of Health and Human Service, Center for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Han-Chung Wu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Wei-Kung Wang
- Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America
- * E-mail:
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Liu IJ, Chiu CY, Chen YC, Wu HC. Molecular mimicry of human endothelial cell antigen by autoantibodies to nonstructural protein 1 of dengue virus. J Biol Chem 2011; 286:9726-36. [PMID: 21233208 DOI: 10.1074/jbc.m110.170993] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The pathogenesis of dengue hemorrhagic fever and dengue shock syndrome (DHF/DSS), both serious complications of dengue virus (DV) infection, remains unclear. In this study, we found that anti-DV NS1 (nonstructural protein 1) polyclonal antibodies cross-reacted with human umbilical vein endothelial cells (HUVECs). We further identified a complex-specific mAb, DB16-1, which could recognize DV NS1 and cross-react with HUVECs and human blood vessels. The target protein of DB16-1 was further purified by immunoaffinity chromatography. LC-MS/MS analysis and co-immunoprecipitation revealed that the target protein of DB16-1 was human LYRIC (lysine-rich CEACAM1 co-isolated). Our newly generated anti-LYRIC mAbs bound to HUVECs in a pattern similar to that of DB16-1. The B-cell epitope of DB16-1 displayed a consensus motif, Lys-X-Trp-Gly (KXWG), which corresponded to amino acid residues 116-119 of DV NS1 and mimicked amino acid residues 334-337 in LYRIC. Moreover, the binding activity of DB16-1 in NS1 of DV-2 and in LYRIC disappeared after the KXWG epitope was deleted in each. In conclusion, DB16-1 targeted the same epitope in DV NS1 and LYRIC protein on human endothelial cells, suggesting that it might play a role in the pathogenesis of DHF/DSS. Future studies on the role of the anti-NS1 antibody in causing vascular permeability will undoubtedly be performed on sera collected from individuals before, during, and after the endothelial cell malfunction phase of a dengue illness.
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Affiliation(s)
- I-Ju Liu
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan
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20
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Peptide-mediated liposomal drug delivery system targeting tumor blood vessels in anticancer therapy. JOURNAL OF ONCOLOGY 2010; 2010:723798. [PMID: 20454584 PMCID: PMC2864512 DOI: 10.1155/2010/723798] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Revised: 01/13/2010] [Accepted: 03/03/2010] [Indexed: 01/07/2023]
Abstract
Solid tumors are known to recruit new blood vessels to support their growth. Therefore, unique molecules expressed on tumor endothelial cells can function as targets for the antiangiogenic therapy of cancer. Current efforts are focusing on developing therapeutic agents capable of specifically targeting cancer cells and tumor-associated microenvironments including tumor blood vessels. These therapies hold the promise of high efficacy and low toxicity. One recognized strategy for improving the therapeutic effectiveness of conventional chemotherapeutics is to encapsulate anticancer drugs into targeting liposomes that bind to the cell surface receptors expressed on tumor-associated endothelial cells. These anti-angiogenic drug delivery systems could be used to target both tumor blood vessels as well as the tumor cells, themselves. This article reviews the mechanisms and advantages of various present and potential methods using peptide-conjugated liposomes to specifically destroy tumor blood vessels in anticancer therapy.
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Shrestha B, Brien JD, Sukupolvi-Petty S, Austin SK, Edeling MA, Kim T, O'Brien KM, Nelson CA, Johnson S, Fremont DH, Diamond MS. The development of therapeutic antibodies that neutralize homologous and heterologous genotypes of dengue virus type 1. PLoS Pathog 2010; 6:e1000823. [PMID: 20369024 PMCID: PMC2848552 DOI: 10.1371/journal.ppat.1000823] [Citation(s) in RCA: 180] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2009] [Accepted: 02/12/2010] [Indexed: 12/03/2022] Open
Abstract
Antibody protection against flaviviruses is associated with the development of neutralizing antibodies against the viral envelope (E) protein. Prior studies with West Nile virus (WNV) identified therapeutic mouse and human monoclonal antibodies (MAbs) that recognized epitopes on domain III (DIII) of the E protein. To identify an analogous panel of neutralizing antibodies against DENV type-1 (DENV-1), we immunized mice with a genotype 2 strain of DENV-1 virus and generated 79 new MAbs, 16 of which strongly inhibited infection by the homologous virus and localized to DIII. Surprisingly, only two MAbs, DENV1-E105 and DENV1-E106, retained strong binding and neutralizing activity against all five DENV-1 genotypes. In an immunocompromised mouse model of infection, DENV1-E105 and DENV1-E106 exhibited therapeutic activity even when administered as a single dose four days after inoculation with a heterologous genotype 4 strain of DENV-1. Using epitope mapping and X-ray crystallographic analyses, we localized the neutralizing determinants for the strongly inhibitory MAbs to distinct regions on DIII. Interestingly, sequence variation in DIII alone failed to explain disparities in neutralizing potential of MAbs among different genotypes. Overall, our experiments define a complex structural epitope on DIII of DENV-1 that can be recognized by protective antibodies with therapeutic potential. Dengue virus (DENV) is a mosquito-transmitted virus that infects 25 to 100 million humans annually and can progress to a life-threatening hemorrhagic fever and shock syndrome. Currently, no vaccines or specific therapies are available. Prior studies identified a highly neutralizing monoclonal antibody (MAb) against West Nile virus, a related flavivirus, as a candidate therapy for humans. In this study, we generated 79 new MAbs against the DENV type 1 (DENV-1) serotype, 16 of which strongly inhibited infection in cell culture. Using structural and molecular approaches, the binding sites of these inhibitory MAbs were localized to distinct regions on domain III of the DENV-1 envelope protein. We tested the protective capacity of all of the neutralizing MAbs in mice against infection by a strain of DENV-1 from a distinct genotype. Only two of the MAbs, DENV1-E105 and DENV1-E106, showed efficacy in a post-exposure treatment model, and these antibodies efficiently neutralized all five DENV-1 genotypes. Collectively, our studies define a complex structural binding site on domain III of the envelope protein for MAbs with therapeutic potential against DENV-1.
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Affiliation(s)
- Bimmi Shrestha
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - James D. Brien
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Soila Sukupolvi-Petty
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - S. Kyle Austin
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Melissa A. Edeling
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Taekyung Kim
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Katie M. O'Brien
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Christopher A. Nelson
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Syd Johnson
- MacroGenics, Inc., Rockville, Maryland, United States of America
| | - Daved H. Fremont
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, Missouri, United States of America
- The Midwest Regional Center of Excellence for Biodefense and Emerging Infectious Diseases Research, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Michael S. Diamond
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- The Midwest Regional Center of Excellence for Biodefense and Emerging Infectious Diseases Research, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- * E-mail:
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Lu TY, Kao CF, Lin CT, Huang DY, Chiu CY, Huang YS, Wu HC. DNA methylation and histone modification regulate silencing of OPG during tumor progression. J Cell Biochem 2010; 108:315-25. [PMID: 19565568 DOI: 10.1002/jcb.22256] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The identification of molecules that are down-regulated in malignant phenotype is important for understanding tumor biology and their role in tumor suppression. We compared the expression profile of four normal nasal mucosal (NNM) epithelia and a series of nasopharyngeal cancinoma (NPC) cell lines using cDNA microarray and confirmed the actual expression of the selected genes, and found osteoprotegerin (OPG) to be ubiquitously deficient in NPC cells. We also found OPG to be down-regulated in various cancer cell lines, including oral, cervical, ovarian, lung, breast, pancreas, colon, renal, prostate cancer, and hepatoma. Administration of recombinant OPG (rOPG) brought about a reduction in cancer cell growth through apoptotic mechanism. We generated eleven monoclonal antibodies (MAbs) against OPG to study OPG's expression and biological functions in cancer cells. OPG was detected in the tumor stromal regions, but not in the cancer cell per se in surgical specimens of liver cancer. Quantitative reverse transcription-polymerase chain reaction (Q-RT-PCR) revealed that OPG was down-regulated in NPC tissues compared with normal nasal polyp (NNP) tissues. In addition, we showed OPG silencing to be associated with promoter methylation as well as histone modifications. In OPG-silenced cancer cell lines, the OPG gene promoter CpG dinucleotides were highly methylated. Compared to normal cells, silenced OPG gene in cancer cells were found to have reduced histone 3 lysine 4 tri-methylation (H3K4me3) and increased histone 3 lysine 27 tri-methylation (H3K27me3). Taken together, these results suggest that OPG silencing in carcinoma cancer cells occurs through epigenetic repression.
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Affiliation(s)
- Tung-Ying Lu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 115, Taiwan
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23
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Lu TY, Lu RM, Liao MY, Yu J, Chung CH, Kao CF, Wu HC. Epithelial cell adhesion molecule regulation is associated with the maintenance of the undifferentiated phenotype of human embryonic stem cells. J Biol Chem 2010; 285:8719-32. [PMID: 20064925 DOI: 10.1074/jbc.m109.077081] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Human embryonic stem cells (hESCs) are unique pluripotent cells capable of self-renewal and differentiation into all three germ layers. To date, more cell surface markers capable of reliably identifying hESCs are needed. The epithelial cell adhesion molecule (EpCAM) is a type I transmembrane glycoprotein expressed in several progenitor cell populations and cancers. It has been used to enrich cells with tumor-initiating activity in xenograft transplantation studies. Here, we comprehensively profile the expression of EpCAM by immunofluorescence microscopy, Western blotting, and flow cytometry using an anti-EpCAM monoclonal antibody (mAb) OC98-1. We found EpCAM to be highly and selectively expressed by undifferentiated rather than differentiated hESCs. The protein and transcript level of EpCAM rapidly diminished as soon as hESC had differentiated. This silencing was closely and exclusively associated with the radical transformation of histone modification at the EpCAM promoter. Moreover, we demonstrated that the dynamic pattern of lysine 27 trimethylation of histone 3 was conferred by the interplay of SUZ12 and JMJD3, both of which were involved in maintaining hESC pluripotency. In addition, we used chromatin immunoprecipitation analysis to elucidate the direct regulation by EpCAM of several reprogramming genes, including c-MYC, OCT-4, NANOG, SOX2, and KLF4, to help maintain the undifferentiation of hESCs. Collectively, our results suggest that EpCAM might be used as a surface marker for hESC. The expression of EpCAM may be regulated by epigenetic mechanisms, and it is strongly associated with the maintenance of the undifferentiated state of hESCs.
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Affiliation(s)
- Tung-Ying Lu
- Institute of Cellular and Organismic Biology, Consiglio Nazionale delle Ricerche, Milan 20131, Italy
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24
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Amin N, Aguilar A, Chamacho F, Vázquez Y, Pupo M, Ramirez JC, Izquierdo L, Dafhnis F, Stott DI, Perez EM, Acosta A. Identification of Dengue-specific B-Cell Epitopes by Phage-display Random Peptide Library. Malays J Med Sci 2009; 16:4-14. [PMID: 22135507 PMCID: PMC3216131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Accepted: 08/30/2009] [Indexed: 05/31/2023] Open
Abstract
BACKGROUND Dengue is the most important human viral disease transmitted by arthropod vectors. The availability of random peptide libraries (RPL) displayed on phage has provided a powerful tool for selecting sequences that mimic epitopes from microorganisms that are useful for diagnostic and vaccine development purposes. In this paper, we describe peptides that resemble the antigenic structure of B-cell epitopes of dengue virus identified from a phage-peptide library using human sera containing polyclonal antibodies against dengue virus. MATERIALS AND METHODS Eighteen phage clones were isolated from the phage-display peptide library, J404, by affinity selection using human antisera against dengue virus type 3. These clones were tested for reactivity by ELISA with a panel of hyperimmune ascitic fluids (HAFs) containing antibodies either against all four dengue serotypes, West Nile virus (WNV) or Eastern equine encephalitis virus (EEEV) with control ascitic fluid (NAF) used as a negative control. RESULTS Eight clones were recognized by HAFs against the four dengue serotypes, of which four significantly inhibited binding of anti-dengue antibodies to the virus. Two peptides with similar sequences to regions of NS3 and NS4B non-structural dengue virus proteins were identified. CONCLUSION Our results suggest that these peptides could be used for the development of diagnostic tools for the detection of dengue virus infection and for a potential vaccine against this pathogen.
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Affiliation(s)
- Nevis Amin
- Molecular Virology Department, Research Vicepresidency, Finlay Institute. Ave 27, No 19805, Havana City, Cuba
| | - Alicia Aguilar
- Molecular Virology Department, Research Vicepresidency, Finlay Institute. Ave 27, No 19805, Havana City, Cuba
| | - Frank Chamacho
- Molecular Virology Department, Research Vicepresidency, Finlay Institute. Ave 27, No 19805, Havana City, Cuba
| | - Yaime Vázquez
- Laboratory of Arbovirus. Department of Virology. Pedro Kourí Institute (IPK)
| | - Maritza Pupo
- Laboratory of Arbovirus. Department of Virology. Pedro Kourí Institute (IPK)
| | - Juan Carlos Ramirez
- Molecular Virology Department, Research Vicepresidency, Finlay Institute. Ave 27, No 19805, Havana City, Cuba
| | - Luis Izquierdo
- Molecular Virology Department, Research Vicepresidency, Finlay Institute. Ave 27, No 19805, Havana City, Cuba
| | - Felix Dafhnis
- Molecular Virology Department, Research Vicepresidency, Finlay Institute. Ave 27, No 19805, Havana City, Cuba
| | - David Ian Stott
- Glasgow Biomedical Research Centre. University of Glasgow,120 University Place, Glasgow G12 8TA, Scotland, U.K
| | - Ela Maria Perez
- Molecular Virology Department, Research Vicepresidency, Finlay Institute. Ave 27, No 19805, Havana City, Cuba
| | - Armando Acosta
- Molecular Virology Department, Research Vicepresidency, Finlay Institute. Ave 27, No 19805, Havana City, Cuba
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Chang DK, Chiu CY, Kuo SY, Lin WC, Lo A, Wang YP, Li PC, Wu HC. Antiangiogenic targeting liposomes increase therapeutic efficacy for solid tumors. J Biol Chem 2009; 284:12905-16. [PMID: 19276080 DOI: 10.1074/jbc.m900280200] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
It is known that solid tumors recruit new blood vessels to support tumor growth, but the molecular diversity of receptors in tumor angiogenic vessels might also be used clinically to develop better targeted therapy. In vivo phage display was used to identify peptides that specifically target tumor blood vessels. Several novel peptides were identified as being able to recognize tumor vasculature but not normal blood vessels in severe combined immunodeficiency (SCID) mice bearing human tumors. These tumor-homing peptides also bound to blood vessels in surgical specimens of various human cancers. The peptide-linked liposomes containing fluorescent substance were capable of translocating across the plasma membrane through endocytosis. With the conjugation of peptides and liposomal doxorubicin, the targeted drug delivery systems enhanced the therapeutic efficacy of the chemotherapeutic agent against human cancer xenografts by decreasing tumor angiogenesis and increasing cancer cell apoptosis. Furthermore, the peptide-mediated targeting liposomes improved the pharmacokinetics and pharmacodynamics of the drug they delivered compared with nontargeting liposomes or free drugs. Our results indicate that the tumor-homing peptides can be used specifically target tumor vasculature and have the potential to improve the systemic treatment of patients with solid tumors.
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Affiliation(s)
- De-Kuan Chang
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
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26
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Chang DK, Lin CT, Wu CH, Wu HC. A novel peptide enhances therapeutic efficacy of liposomal anti-cancer drugs in mice models of human lung cancer. PLoS One 2009; 4:e4171. [PMID: 19137069 PMCID: PMC2614347 DOI: 10.1371/journal.pone.0004171] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Accepted: 12/02/2008] [Indexed: 12/02/2022] Open
Abstract
Lung cancer is the leading cause of cancer-related mortality worldwide. The lack of tumor specificity remains a major drawback for effective chemotherapies and results in dose-limiting toxicities. However, a ligand-mediated drug delivery system should be able to render chemotherapy more specific to tumor cells and less toxic to normal tissues. In this study, we isolated a novel peptide ligand from a phage-displayed peptide library that bound to non-small cell lung cancer (NSCLC) cell lines. The targeting phage bound to several NSCLC cell lines but not to normal cells. Both the targeting phage and the synthetic peptide recognized the surgical specimens of NSCLC with a positive rate of 75% (27 of 36 specimens). In severe combined immunodeficiency (SCID) mice bearing NSCLC xenografts, the targeting phage specifically bound to tumor masses. The tumor homing ability of the targeting phage was inhibited by the cognate synthetic peptide, but not by a control or a WTY-mutated peptide. When the targeting peptide was coupled to liposomes carrying doxorubicin or vinorelbine, the therapeutic index of the chemotherapeutic agents and the survival rates of mice with human lung cancer xenografts markedly increased. Furthermore, the targeting liposomes increased drug accumulation in tumor tissues by 5.7-fold compared with free drugs and enhanced cancer cell apoptosis resulting from a higher concentration of bioavailable doxorubicin. The current study suggests that this tumor-specific peptide may be used to create chemotherapies specifically targeting tumor cells in the treatment of NSCLC and to design targeted gene transfer vectors or it may be used one in the diagnosis of this malignancy.
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Affiliation(s)
- De-Kuan Chang
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
- Institute of Pathology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chin-Tarng Lin
- Institute of Pathology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chien-Hsun Wu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Han-Chung Wu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
- Institute of Pathology, College of Medicine, National Taiwan University, Taipei, Taiwan
- * E-mail:
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27
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Lo A, Lin CT, Wu HC. Hepatocellular carcinoma cell-specific peptide ligand for targeted drug delivery. Mol Cancer Ther 2008; 7:579-89. [PMID: 18347144 DOI: 10.1158/1535-7163.mct-07-2359] [Citation(s) in RCA: 135] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hepatocellular carcinoma is the fourth leading cause of cancer death worldwide. Novel treatment strategies derived from increased knowledge of molecular oncology are constantly being developed to cure this disease. Here, we used phage display to identify a novel peptide (SP94), which binds specifically to hepatocellular carcinoma cells. In vitro, the phage clone PC94 was shown to bind to hepatocellular carcinoma cell lines by ELISA and flow cytometry analysis. In vivo, PC94 homed specifically to tumor tissues but not to normal visceral organs in severe combined immunodeficient mice bearing human hepatocellular carcinoma xenografts. This homing ability could be competitively inhibited by synthetic peptide, SP94. Immunohistochemical staining confirmed that PC94 localized to tumor tissues and that it could not be detected in SP94-competed tumor tissues. In addition, PC94 recognized the tumor tissue but not nontumor tissue in surgical specimens from hepatocellular carcinoma patients, with a positive rate of 61.3% (19 of 31). With the conjugation of SP94 and liposomal doxorubicin, the targeted drug delivery system enhanced the therapeutic efficacy against hepatocellular carcinoma xenografts through enhanced tumor apoptosis and decreased tumor angiogenesis. Our results indicate that SP94 has the potential to improve the systemic treatment of patients with advanced hepatocellular carcinoma.
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Affiliation(s)
- Albert Lo
- Institute of Cellular and Organismic Biology, Academia Sinica, Nankang, Taipei, Taiwan
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Lindesmith LC, Donaldson EF, LoBue AD, Cannon JL, Zheng DP, Vinje J, Baric RS. Mechanisms of GII.4 norovirus persistence in human populations. PLoS Med 2008; 5:e31. [PMID: 18271619 PMCID: PMC2235898 DOI: 10.1371/journal.pmed.0050031] [Citation(s) in RCA: 419] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2007] [Accepted: 12/12/2007] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Noroviruses are the leading cause of viral acute gastroenteritis in humans, noted for causing epidemic outbreaks in communities, the military, cruise ships, hospitals, and assisted living communities. The evolutionary mechanisms governing the persistence and emergence of new norovirus strains in human populations are unknown. Primarily organized by sequence homology into two major human genogroups defined by multiple genoclusters, the majority of norovirus outbreaks are caused by viruses from the GII.4 genocluster, which was first recognized as the major epidemic strain in the mid-1990s. Previous studies by our laboratory and others indicate that some noroviruses readily infect individuals who carry a gene encoding a functional alpha-1,2-fucosyltransferase (FUT2) and are designated "secretor-positive" to indicate that they express ABH histo-blood group antigens (HBGAs), a highly heterogeneous group of related carbohydrates on mucosal surfaces. Individuals with defects in the FUT2 gene are termed secretor-negative, do not express the appropriate HBGA necessary for docking, and are resistant to Norwalk infection. These data argue that FUT2 and other genes encoding enzymes that regulate processing of the HBGA carbohydrates function as susceptibility alleles. However, secretor-negative individuals can be infected with other norovirus strains, and reinfection with the GII.4 strains is common in human populations. In this article, we analyze molecular mechanisms governing GII.4 epidemiology, susceptibility, and persistence in human populations. METHODS AND FINDINGS Phylogenetic analyses of the GII.4 capsid sequences suggested an epochal evolution over the last 20 y with periods of stasis followed by rapid evolution of novel epidemic strains. The epidemic strains show a linear relationship in time, whereby serial replacements emerge from the previous cluster. Five major evolutionary clusters were identified, and representative ORF2 capsid genes for each cluster were expressed as virus-like particles (VLPs). Using salivary and carbohydrate-binding assays, we showed that GII.4 VLP-carbohydrate ligand binding patterns have changed over time and include carbohydrates regulated by the human FUT2 and FUT3 pathways, suggesting that strain sensitivity to human susceptibility alleles will vary. Variation in surface-exposed residues and in residues that surround the fucose ligand interaction domain suggests that antigenic drift may promote GII.4 persistence in human populations. Evidence supporting antigenic drift was obtained by measuring the antigenic relatedness of GII.4 VLPs using murine and human sera and demonstrating strain-specific serologic and carbohydrate-binding blockade responses. These data suggest that the GII.4 noroviruses persist by altering their HBGA carbohydrate-binding targets over time, which not only allows for escape from highly penetrant host susceptibility alleles, but simultaneously allows for immune-driven selection in the receptor-binding region to facilitate escape from protective herd immunity. CONCLUSIONS Our data suggest that the surface-exposed carbohydrate ligand binding domain in the norovirus capsid is under heavy immune selection and likely evolves by antigenic drift in the face of human herd immunity. Variation in the capsid carbohydrate-binding domain is tolerated because of the large repertoire of similar, yet distinct HBGA carbohydrate receptors available on mucosal surfaces that could interface with the remodeled architecture of the capsid ligand-binding pocket. The continuing evolution of new replacement strains suggests that, as with influenza viruses, vaccines could be targeted that protect against norovirus infections, and that continued epidemiologic surveillance and reformulations of norovirus vaccines will be essential in the control of future outbreaks.
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Affiliation(s)
- Lisa C Lindesmith
- University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Eric F Donaldson
- University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Anna D LoBue
- University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Jennifer L Cannon
- University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
- Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Du-Ping Zheng
- Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Jan Vinje
- Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Ralph S Baric
- University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
- * To whom correspondence should be addressed. E-mail:
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29
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Cabezas S, Rojas G, Pavon A, Alvarez M, Pupo M, Guillen G, Guzman MG. Selection of phage-displayed human antibody fragments on Dengue virus particles captured by a monoclonal antibody: Application to the four serotypes. J Virol Methods 2008; 147:235-43. [DOI: 10.1016/j.jviromet.2007.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2007] [Revised: 09/01/2007] [Accepted: 09/05/2007] [Indexed: 10/22/2022]
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