1
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Mungra N, Nsole Biteghe FA, Huysamen AM, Hardcastle NS, Bunjun R, Naran K, Lang D, Richter W, Hunter R, Barth S. An Investigation into the In Vitro Targeted Killing of CD44-Expressing Triple-Negative Breast Cancer Cells Using Recombinant Photoimmunotherapeutics Compared to Auristatin-F-Based Antibody-Drug Conjugates. Mol Pharm 2024; 21:4098-4115. [PMID: 39047292 DOI: 10.1021/acs.molpharmaceut.4c00449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
Triple-negative breast cancer (TNBC) is the deadliest form of breast cancer with limited treatment options. The persistence of highly tumorigenic CD44-expressing subpopulation referred to as cancer stem cells (CSCs), endowed with the self-renewal capacity, has been associated with therapeutic resistance, hence clinical relapses. To mitigate these undesired events, targeted immunotherapies using antibody-photoconjugate (APC) or antibody-drug conjugate (ADC), were developed to specifically release cytotoxic payloads within targeted cells overexpressing cognate antigen receptors. Therefore, an αCD44(scFv)-SNAP-tag antibody fusion protein was engineered through genetic fusion of a single-chain antibody fragment (scFv) to a SNAPf-tag fusion protein, capable of self-conjugating with benzylguanine-modified light-sensitive near-infrared (NIR) phthalocyanine dye IRDye700DX (BG-IR700) or the small molecule toxin auristatin-F (BG-AURIF). Binding of the αCD44(scFv)-SNAPf-IR700 photoimmunoconjugate to antigen-positive cells was demonstrated by confocal microscopy and flow cytometry. By switching to NIR irradiation, CD44-expressing TNBC was selectively killed through induced phototoxic activities. Likewise, the αCD44(scFv)-SNAPf-AURIF immunoconjugate was able to selectively accumulate within targeted cells and significantly reduced cell viability through antimitotic activities at nano- to micromolar drug concentrations. This study provides an in vitro proof-of-concept for a future strategy to selectively destroy light-accessible superficial CD44-expressing TNBC tumors and their metastatic lesions which are inaccessible to therapeutic light.
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Affiliation(s)
- Neelakshi Mungra
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town 7700, South Africa
- Centre for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington 98101, United States
| | - Fleury A Nsole Biteghe
- College of Science, Department of Biotechnology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Allan M Huysamen
- Department of Chemistry, University of Cape Town, PD Hahn Building, Cape Town 7700, South Africa
| | - Natasha S Hardcastle
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town 7700, South Africa
| | - Rubina Bunjun
- Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town 7700, South Africa
- Division of Medical Virology, Department of Pathology, University of Cape Town, Cape Town 7700, South Africa
| | - Krupa Naran
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town 7700, South Africa
| | - Dirk Lang
- Division of Physiological Sciences, Department of Human Biology, University of Cape Town, Cape Town 7700, South Africa
| | | | - Roger Hunter
- Department of Chemistry, University of Cape Town, PD Hahn Building, Cape Town 7700, South Africa
| | - Stefan Barth
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town 7700, South Africa
- Faculty of Health Sciences, Department of Integrative Biomedical Sciences, South African Research Chair in Cancer Biotechnology, University of Cape Town, Cape Town 7700, South Africa
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2
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Wang S, Li Y, Mei J, Wu S, Ying G, Yi Y. Precision engineering of antibodies: A review of modification and design in the Fab region. Int J Biol Macromol 2024; 275:133730. [PMID: 38986973 DOI: 10.1016/j.ijbiomac.2024.133730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 06/27/2024] [Accepted: 07/06/2024] [Indexed: 07/12/2024]
Abstract
The binding of functional groups to antibodies is crucial for disease treatment, diagnosis, and basic scientific research. Traditionally, antibody modifications have focused on the Fc region to maintain antigen-antibody binding activity. However, such modifications may impact critical antibody functions, including immune cell surface receptor activation, cytokine release, and other immune responses. In recent years, modifications targeting the antigen-binding fragment (Fab) region have garnered increasing attention. Precise modifications of the Fab region not only maximize the retention of antigen-antibody binding capacity but also enhance numerous physicochemical properties of antibodies. This paper reviews the chemical, biological, biochemical, and computer-assisted methods for modifying the Fab region of antibodies, discussing their advantages, limitations, recent advances, and future trends.
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Affiliation(s)
- Sa Wang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Yao Li
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Jianfeng Mei
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Shujiang Wu
- Hangzhou Biotest Biotech Co., Ltd, Hangzhou 310014, China.
| | - Guoqing Ying
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Yu Yi
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
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3
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Zhang K, Zhou Y, Zhang J, Liu Q, Hanenberg C, Mourran A, Wang X, Gao X, Cao Y, Herrmann A, Zheng L. Shape morphing of hydrogels by harnessing enzyme enabled mechanoresponse. Nat Commun 2024; 15:249. [PMID: 38172560 PMCID: PMC10764310 DOI: 10.1038/s41467-023-44607-y] [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: 08/09/2023] [Accepted: 12/21/2023] [Indexed: 01/05/2024] Open
Abstract
Hydrogels have been designed to react to many different stimuli which find broad applications in tissue engineering and soft robotics. However, polymer networks bearing mechano-responsiveness, especially those displaying on-demand self-stiffening and self-softening behavior, are rarely reported. Here, we design a mechano-controlled biocatalytic system at the molecular level that is incorporated into hydrogels to regulate their mechanical properties at the material scale. The biocatalytic system consists of the protease thrombin and its inhibitor, hirudin, which are genetically engineered and covalently coupled to the hydrogel networks. The catalytic activity of thrombin is reversibly switched on by stretching of the hydrogels, which disrupts the noncovalent inhibitory interaction between both entities. Under cyclic tensile-loading, hydrogels exhibit self-stiffening or self-softening properties when substrates are present that can self-assemble to form new networks after being activated by thrombin or when cleavable peptide crosslinkers are constitutional components of the original network, respectively. Additionally, we demonstrate the programming of bilayer hydrogels to exhibit tailored shape-morphing behavior under mechanical stimulation. Our developed system provides proof of concept for mechanically controlled reversible biocatalytic processes, showcasing their potential for regulating hydrogels and proposing a biomacromolecular strategy for mechano-regulated soft functional materials.
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Affiliation(s)
- Kuan Zhang
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325001, China
- DWI - Leibniz-Institute for Interactive Materials, Aachen, 52056, Germany
- Institute for Technical and Macromolecular Chemistry, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, 52074, Germany
| | - Yu Zhou
- DWI - Leibniz-Institute for Interactive Materials, Aachen, 52056, Germany
| | - Junsheng Zhang
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325001, China
| | - Qing Liu
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325001, China
| | - Christina Hanenberg
- DWI - Leibniz-Institute for Interactive Materials, Aachen, 52056, Germany
- Institute for Technical and Macromolecular Chemistry, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, 52074, Germany
| | - Ahmed Mourran
- DWI - Leibniz-Institute for Interactive Materials, Aachen, 52056, Germany
| | - Xin Wang
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325001, China
| | - Xiang Gao
- DWI - Leibniz-Institute for Interactive Materials, Aachen, 52056, Germany
- Institute for Technical and Macromolecular Chemistry, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, 52074, Germany
| | - Yi Cao
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325001, China
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, 22 Hankou Road, Nanjing, 210093, China
| | - Andreas Herrmann
- DWI - Leibniz-Institute for Interactive Materials, Aachen, 52056, Germany.
- Institute for Technical and Macromolecular Chemistry, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, 52074, Germany.
| | - Lifei Zheng
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325001, China.
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4
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Mungra N, Biteghe FAN, Malindi Z, Huysamen AM, Karaan M, Hardcastle NS, Bunjun R, Chetty S, Naran K, Lang D, Richter W, Hunter R, Barth S. CSPG4 as a target for the specific killing of triple-negative breast cancer cells by a recombinant SNAP-tag-based antibody-auristatin F drug conjugate. J Cancer Res Clin Oncol 2023; 149:12203-12225. [PMID: 37432459 PMCID: PMC10465649 DOI: 10.1007/s00432-023-05031-3] [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: 05/18/2023] [Accepted: 06/27/2023] [Indexed: 07/12/2023]
Abstract
PURPOSE Triple-negative breast cancer (TNBC) is phenotypic of breast tumors lacking expression of the estrogen receptor (ER), the progesterone receptor (PgR), and the human epidermal growth factor receptor 2 (HER2). The paucity of well-defined molecular targets in TNBC, coupled with the increasing burden of breast cancer-related mortality, emphasizes the need to develop targeted diagnostics and therapeutics. While antibody-drug conjugates (ADCs) have emerged as revolutionary tools in the selective delivery of drugs to malignant cells, their widespread clinical use has been hampered by traditional strategies which often give rise to heterogeneous mixtures of ADC products. METHODS Utilizing SNAP-tag technology as a cutting-edge site-specific conjugation method, a chondroitin sulfate proteoglycan 4 (CSPG4)-targeting ADC was engineered, encompassing a single-chain antibody fragment (scFv) conjugated to auristatin F (AURIF) via a click chemistry strategy. RESULTS After showcasing the self-labeling potential of the SNAP-tag component, surface binding and internalization of the fluorescently labeled product were demonstrated on CSPG4-positive TNBC cell lines through confocal microscopy and flow cytometry. The cell-killing ability of the novel AURIF-based recombinant ADC was illustrated by the induction of a 50% reduction in cell viability at nanomolar to micromolar concentrations on target cell lines. CONCLUSION This research underscores the applicability of SNAP-tag in the unambiguous generation of homogeneous and pharmaceutically relevant immunoconjugates that could potentially be instrumental in the management of a daunting disease like TNBC.
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Affiliation(s)
- Neelakshi Mungra
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town, 7700 South Africa
- Centre for Immunity and Immunotherapies, Seattle Children’s Research Institute, Washington, 98101 USA
| | - Fleury A. N. Biteghe
- Department of Radiation Oncology and Biomedical Sciences, Cedars-Sinai Medical, Los Angeles, USA
| | - Zaria Malindi
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town, 7700 South Africa
- Faculty of Health Sciences, Laser Research Centre, University of Johannesburg, Doornfontein, Johannesburg, 2028 South Africa
| | - Allan M. Huysamen
- Department of Chemistry, PD Hahn Building, University of Cape Town, Cape Town, 7700 South Africa
| | - Maryam Karaan
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town, 7700 South Africa
| | - Natasha S. Hardcastle
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town, 7700 South Africa
| | - Rubina Bunjun
- Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, 7700 South Africa
- Division of Medical Virology, Department of Pathology, University of Cape Town, Cape Town, 7700 South Africa
| | - Shivan Chetty
- Faculty of Health Sciences, School of Clinical Medicine, University of Witwatersrand, Braamfontein, Johannesburg, 2000 South Africa
| | - Krupa Naran
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town, 7700 South Africa
| | - Dirk Lang
- Division of Physiological Sciences, Department of Human Biology, University of Cape Town, Cape Town, 7700 South Africa
| | | | - Roger Hunter
- Department of Chemistry, PD Hahn Building, University of Cape Town, Cape Town, 7700 South Africa
| | - Stefan Barth
- Institute of Infectious Disease and Molecular Medicine, Medical Biotechnology and Immunotherapy Research Unit, University of Cape Town, Cape Town, 7700 South Africa
- Faculty of Health Sciences, Department of Integrative Biomedical Sciences, South African Research Chair in Cancer Biotechnology, University of Cape Town, Cape Town, 7700 South Africa
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5
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Mohiuddin TM, Zhang C, Sheng W, Al-Rawe M, Zeppernick F, Meinhold-Heerlein I, Hussain AF. Near Infrared Photoimmunotherapy: A Review of Recent Progress and Their Target Molecules for Cancer Therapy. Int J Mol Sci 2023; 24:2655. [PMID: 36768976 PMCID: PMC9916513 DOI: 10.3390/ijms24032655] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/26/2023] [Accepted: 01/28/2023] [Indexed: 02/01/2023] Open
Abstract
Near infrared photoimmunotherapy (NIR-PIT) is a newly developed molecular targeted cancer treatment, which selectively kills cancer cells or immune-regulatory cells and induces therapeutic host immune responses by administrating a cancer targeting moiety conjugated with IRdye700. The local exposure to near-infrared (NIR) light causes a photo-induced ligand release reaction, which causes damage to the target cell, resulting in immunogenic cell death (ICD) with little or no side effect to the surrounding normal cells. Moreover, NIR-PIT can generate an immune response in distant metastases and inhibit further cancer attack by combing cancer cells targeting NIR-PIT and immune regulatory cells targeting NIR-PIT or other cancer treatment modalities. Several recent improvements in NIR-PIT have been explored such as catheter-driven NIR light delivery, real-time monitoring of cancer, and the development of new target molecule, leading to NIR-PIT being considered as a promising cancer therapy. In this review, we discuss the progress of NIR-PIT, their mechanism and design strategies for cancer treatment. Furthermore, the overall possible targeting molecules for NIR-PIT with their application for cancer treatment are briefly summarised.
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6
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Malindi Z, Barth S, Abrahamse H. The Potential of Antibody Technology and Silver Nanoparticles for Enhancing Photodynamic Therapy for Melanoma. Biomedicines 2022; 10:2158. [PMID: 36140259 PMCID: PMC9495799 DOI: 10.3390/biomedicines10092158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/25/2022] [Accepted: 08/29/2022] [Indexed: 11/17/2022] Open
Abstract
Melanoma is highly aggressive and is known to be efficient at resisting drug-induced apoptotic signals. Resection is currently the gold standard for melanoma management, but it only offers local control of the early stage of the disease. Metastatic melanoma is prone to recurrence, and has a poor prognosis and treatment response. Thus, the need for advanced theranostic alternatives is evident. Photodynamic therapy has been increasingly studied for melanoma treatment; however, it relies on passive drug accumulation, leading to off-target effects. Nanoparticles enhance drug biodistribution, uptake and intra-tumoural concentration and can be functionalised with monoclonal antibodies that offer selective biorecognition. Antibody-drug conjugates reduce passive drug accumulation and off-target effects. Nonetheless, one limitation of monoclonal antibodies and antibody-drug conjugates is their lack of versatility, given cancer's heterogeneity. Monoclonal antibodies suffer several additional limitations that make recombinant antibody fragments more desirable. SNAP-tag is a modified version of the human DNA-repair enzyme, O6-alkylguanine-DNA alkyltransferase. It reacts in an autocatalytic and covalent manner with benzylguanine-modified substrates, providing a simple protein labelling system. SNAP-tag can be genetically fused with antibody fragments, creating fusion proteins that can be easily labelled with benzylguanine-modified payloads for site-directed delivery. This review aims to highlight the benefits and limitations of the abovementioned approaches and to outline how their combination could enhance photodynamic therapy for melanoma.
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Affiliation(s)
- Zaria Malindi
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, 55 Beit Street, Doornfontein, Johannesburg 2028, South Africa
| | - Stefan Barth
- Medical Biotechnology and Immunotherapy Research Unit, Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Anzio Road Observatory, Cape Town 7925, South Africa
| | - Heidi Abrahamse
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, 55 Beit Street, Doornfontein, Johannesburg 2028, South Africa
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7
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Tang J, Zhang G, Li F, Zeng R, Song J, Abbas G, Cui M, Zhang W, Zhang XE, Wang DB. Two-Dimensional Protein Nanoarray as a Carrier of Sensing Elements for Gold-Based Immunosensing Systems. Anal Chem 2022; 94:9355-9362. [PMID: 35729689 DOI: 10.1021/acs.analchem.2c01190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Homogeneous and high-density immobilization of proteins on gold-based sensing surface without the loss of protein activity is of great significance for high-performance immunosensing but remains challenging. To realize more sensitive immunosensing, an improved method for protein immobilization on the gold surface is urgently required. Here, we propose a biological and mild approach by combining a genetically encoded SpyTag-SpyCatcher interaction system with a redesigned S-layer of bacteria. This method allows proteins of interest to be covalently linked with the S-layer in a biological manner and arranged orderly in a two-dimensional nanoarray on the gold surface. The activity of African swine fever virus proteins was significantly preserved after immobilization. In addition, our S-layer-based immobilization method exhibited an eightfold increase in detection sensitivity compared with the conventional chemical cross-linking for protein immobilization during serological tests. Together, our S-layer-based immobilization method provides an innovative approach for building a quality gold-based biosensing interface and should greatly contribute to the high-sensitivity sensing for a deeper understanding of pathogen infection and host immunity.
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Affiliation(s)
- Jingya Tang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guimin Zhang
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Feng Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Rongyu Zeng
- TECON Pharmaceutical (Suzhou) Co., Ltd, Suzhou 215000, China
| | - Jin Song
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Ghulam Abbas
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mengmeng Cui
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Wei Zhang
- Institutional Center for Shared Technologies and Facilities of Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xian-En Zhang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.,Faculty of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dian-Bing Wang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
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8
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EpCAM- and EGFR-Specific Antibody Drug Conjugates for Triple-Negative Breast Cancer Treatment. Int J Mol Sci 2022; 23:ijms23116122. [PMID: 35682800 PMCID: PMC9181111 DOI: 10.3390/ijms23116122] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/18/2022] [Accepted: 05/27/2022] [Indexed: 12/29/2022] Open
Abstract
Triple-negative breast cancer (TNBC) is a group of heterogeneous and refractory breast cancers with the absence of estrogen receptor (ER), progesterone receptor (PgR) and epidermal growth factor receptor 2 (HER2). Over the past decade, antibody drug conjugates (ADCs) have ushered in a new era of targeting therapy. Since the epidermal growth factor receptor (EGFR) and epithelial cell adhesion molecule (EpCAM) are over expressed on triple-negative breast cancer, we developed novel ADCs by conjugating benzylguanine (BG)-modified monomethyl auristatin E (MMAE) to EpCAM- and EGFR-specific SNAP-tagged single chain antibody fragments (scFvs). Rapid and efficient conjugation was achieved by SNAP-tag technology. The binding and internalization properties of scFv-SNAP fusion proteins were confirmed by flow cytometry and fluorescence microscopy. The dose-dependent cytotoxicity was evaluated in cell lines expressing different levels of EGFR and EpCAM. Both ADCs showed specific cytotoxicity to EGFR or EpCAM positive cell lines via inducing apoptosis at a nanomolar concentration. Our study demonstrated that EGFR specific scFv-425-SNAP-BG-MMAE and EpCAM-specific scFv-EpCAM-SNAP-BG-MMAE could be promising ADCs for the treatment of TNBC.
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9
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Fu J, Lv Y, Jia Q, Wang C, Wang S, Liang P, Han S, He L. Purification and Determination of Antibody Drugs in Bio-Samples by EGFR/Cell Membrane Chromatography Method. J Pharm Biomed Anal 2022; 217:114808. [DOI: 10.1016/j.jpba.2022.114808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/22/2022] [Accepted: 04/27/2022] [Indexed: 10/18/2022]
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10
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Li X, Yang X, Li Z, Zheng X, Peng YJ, Lin W, Zhou L, Cao D, Situ M, Tu Q, Huang H, Fan W, Feng G, Zhang X. Development of a Radiotracer for PET Imaging of the SNAP Tag. ACS OMEGA 2022; 7:7550-7555. [PMID: 35284707 PMCID: PMC8908366 DOI: 10.1021/acsomega.1c05856] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 02/01/2022] [Indexed: 06/14/2023]
Abstract
Cell therapies have progressed to cures for hematopoietic disorders, neurodegenerative diseases, and cancer. However, only some patients can benefit from cell therapies even with prior screening. Due to the limited clinical methods to monitor the in vivo therapeutic functions of these transferred cells over time, the uncertain prognosis is hard to attenuate. Positron emission tomography (PET) cell tracking can provide comprehensive dynamic and spatial information on the proliferation status and whole-body distribution of the therapeutic cell. In this work, we designed and synthesized the first SNAP-tagged PET radiotracer. SNAP tag is an O 6-alkylguanine-DNA alkyltransferase that can form an irreversible bond with 18F-BG-surface for in vivo cell tracking based on a reporter gene system. 18F-BG-surface was obtained by the F-Al radiolabeling method in 32 ± 7% radiochemical yield and showed a high in vitro stability in mouse serum. SNAP-tagged cells could be selectively targeted by 18F-BG-surface both in vitro (4.81 ± 0.08%AD/106 cell vs 2.26 ± 0.10%AD/106 cell) and in vivo (1.90 ± 0.05 vs 0.55 ± 0.02% ID/g, p < 0.01).
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Affiliation(s)
- Xinling Li
- Department
of Nuclear Medicine, Sun Yat-sen University State Key Laboratory of
Oncology in South China; Collaborative Innovation Center for Cancer
Medicine, Sun Yat-sen University Cancer
Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Xiaochun Yang
- Department
of Nuclear Medicine, Sun Yat-sen University State Key Laboratory of
Oncology in South China; Collaborative Innovation Center for Cancer
Medicine, Sun Yat-sen University Cancer
Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Zhijian Li
- Department
of Nuclear Medicine, Sun Yat-sen University State Key Laboratory of
Oncology in South China; Collaborative Innovation Center for Cancer
Medicine, Sun Yat-sen University Cancer
Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Xiaobin Zheng
- Department
of Nuclear Medicine, Sun Yat-sen University State Key Laboratory of
Oncology in South China; Collaborative Innovation Center for Cancer
Medicine, Sun Yat-sen University Cancer
Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Yong-jian Peng
- State
Key Laboratory of Oncology in South China; Collaborative Innovation
Center for Cancer Medicine, Sun Yat-sen
University Cancer Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Wenjie Lin
- State
Key Laboratory of Oncology in South China; Collaborative Innovation
Center for Cancer Medicine, Sun Yat-sen
University Cancer Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Ling Zhou
- Sun
Yat-sen University State Key Laboratory of Oncology in South China;
Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Dehai Cao
- State
Key Laboratory of Oncology in South China; Collaborative Innovation
Center for Cancer Medicine, Sun Yat-sen
University Cancer Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Minyi Situ
- State
Key Laboratory of Oncology in South China; Collaborative Innovation
Center for Cancer Medicine, Sun Yat-sen
University Cancer Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Qingqiang Tu
- Laboratory
Animal Center, Sun Yat-sen University Zhongshan
School of Medicine, 74 Zhongshan 2th Road, Guangzhou, Guangdong Province 510085, China
| | - Huiqiang Huang
- State
Key Laboratory of Oncology in South China; Collaborative Innovation
Center for Cancer Medicine, Sun Yat-sen
University Cancer Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Wei Fan
- Department
of Nuclear Medicine, Sun Yat-sen University State Key Laboratory of
Oncology in South China; Collaborative Innovation Center for Cancer
Medicine, Sun Yat-sen University Cancer
Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Guokai Feng
- State
Key Laboratory of Oncology in South China; Collaborative Innovation
Center for Cancer Medicine, Sun Yat-sen
University Cancer Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
| | - Xiaofei Zhang
- Department
of Nuclear Medicine, Sun Yat-sen University State Key Laboratory of
Oncology in South China; Collaborative Innovation Center for Cancer
Medicine, Sun Yat-sen University Cancer
Center, 651 Dongfengdong Road, Guangzhou, Guangdong Province 510060, China
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11
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Depke DA, Konken CP, Rösner L, Hermann S, Schäfers M, Rentmeister A. A novel 18F-labeled clickable substrate for targeted imaging of SNAP-tag expressing cells by PET in vivo. Chem Commun (Camb) 2021; 57:9850-9853. [PMID: 34490435 DOI: 10.1039/d1cc03871k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bioorthogonal covalent labeling with self-labeling enzymes like SNAP-tag bears a high potential for specific targeting of cells for imaging in vitro and also in vivo. To this end, fluorescent SNAP substrates have been established and used in microscopy and fluorescence imaging while radioactive substrates for the highly sensitive and whole-body positron emission tomography (PET) have been lacking. Here, we show for the first time successful and high-contrast PET imaging of subcutaneous SNAP-tag expressing tumor xenografts by bioorthogonal covalent targeting with a novel 18F-based radioligand in vivo.
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Affiliation(s)
- Dominic Alexej Depke
- European Institute for Molecular Imaging (EIMI), University of Münster, Germany.
| | - Christian Paul Konken
- European Institute for Molecular Imaging (EIMI), University of Münster, Germany. .,Department of Nuclear Medicine, University Hospital Münster, Germany
| | - Lukas Rösner
- Institute of Biochemistry, University of Münster, Germany.
| | - Sven Hermann
- European Institute for Molecular Imaging (EIMI), University of Münster, Germany.
| | - Michael Schäfers
- European Institute for Molecular Imaging (EIMI), University of Münster, Germany. .,Department of Nuclear Medicine, University Hospital Münster, Germany
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12
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Fu J, Jia Q, Liang P, Wang S, Zhou H, Zhang L, Gao C, Wang H, Lv Y, Han S. Targeting and Covalently Immobilizing the EGFR through SNAP-Tag Technology for Screening Drug Leads. Anal Chem 2021; 93:11719-11728. [PMID: 34415741 DOI: 10.1021/acs.analchem.1c01664] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Membrane protein immobilization is particularly significant in in vitro drug screening and determining drug-receptor interactions. However, there are still some problems in the immobilization of membrane proteins with controllable direction and high conformational stability, activity, and specificity. Cell membrane chromatography (CMC) retains the complete biological structure of membrane proteins. However, conventional CMC has the limitation of poor stability, which results in its limited life span and low reproducibility. To overcome this limitation, we propose a method for the specific covalent immobilization of membrane proteins in cell membranes. We used the SNAP-tag as an immobilization tag fused to the epidermal growth factor receptor (EGFR), and Cys145 located at the active site of the SNAP-tag reacted with the benzyl group of O6-benzylguanine (BG). The SNAP-tagged EGFR was expressed in HEK293 cells. We captured the SNAP-tagged EGFR from the cell membrane suspension onto a BG-derivative-modified silica gel. Our immobilization strategy improved the life span and specificity of CMC and minimized loss of activity and nonspecific attachment of proteins. Next, a SNAP-tagged EGFR/CMC online HPLC-IT-TOF-MS system was established to screen EGFR antagonists from Epimedii folium. Icariin, magnoflorine, epimedin B, and epimedin C were retained in this model, and pharmacological assays revealed that magnoflorine could inhibit cancer cell growth by targeting the EGFR. This EGFR immobilization method may open up possibilities for the immobilization of other membrane proteins and has the potential to serve as a useful platform for screening receptor-binding leads from natural medicinal herbs.
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Affiliation(s)
- Jia Fu
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
| | - Qianqian Jia
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
| | - Peida Liang
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
| | - Saisai Wang
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
| | - Huaxin Zhou
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
| | - Liyang Zhang
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
| | - Chunlei Gao
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
| | - Hong Wang
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
| | - Yanni Lv
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
| | - Shengli Han
- School of Pharmacy, Xi'an Jiaotong University, 76# Yanta West Road, Xi'an 710061, China.,Institute of Pharmaceutical Science and Technology, Western China Science &Technology Innovation Harbour, Xi'an 710115, China.,Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou) Implement Planning, No. 70 Yuean Road, Haizhu District, Guangzhou 510289, China
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von Witting E, Hober S, Kanje S. Affinity-Based Methods for Site-Specific Conjugation of Antibodies. Bioconjug Chem 2021; 32:1515-1524. [PMID: 34369763 PMCID: PMC8377709 DOI: 10.1021/acs.bioconjchem.1c00313] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Conjugation of various reagents to antibodies has long been an elegant way to combine the superior binding features of the antibody with other desired but non-natural functions. Applications range from labels for detection in different analytical assays to the creation of new drugs by conjugation to molecules which improves the pharmaceutical effect. In many of these applications, it has been proven advantageous to control both the site and the stoichiometry of the conjugation to achieve a homogeneous product with predictable, and often also improved, characteristics. For this purpose, many research groups have, during the latest decade, reported novel methods and techniques, based on small molecules, peptides, and proteins with inherent affinity for the antibody, for site-specific conjugation of antibodies. This review provides a comprehensive overview of these methods and their applications and also describes a historical perspective of the field.
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Affiliation(s)
- Emma von Witting
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, AlbaNova University Centre, SE-114 19, Stockholm, Sweden
| | - Sophia Hober
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, AlbaNova University Centre, SE-114 19, Stockholm, Sweden
| | - Sara Kanje
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, AlbaNova University Centre, SE-114 19, Stockholm, Sweden
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Toward Homogenous Antibody Drug Conjugates Using Enzyme-Based Conjugation Approaches. Pharmaceuticals (Basel) 2021; 14:ph14040343. [PMID: 33917962 PMCID: PMC8068374 DOI: 10.3390/ph14040343] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/02/2021] [Accepted: 04/04/2021] [Indexed: 01/17/2023] Open
Abstract
In the last few decades, antibody-based diagnostic and therapeutic applications have been well established in medicine and have revolutionized cancer managements by improving tumor detection and treatment. Antibodies are unique medical elements due to their powerful properties of being able to recognize specific antigens and their therapeutic mechanisms such as blocking specific pathways, antibody-dependent cellular cytotoxicity, and complement-dependent cytotoxicity. Furthermore, modification techniques have paved the way for improving antibody properties and to develop new classes of antibody-conjugate-based diagnostic and therapeutic agents. These techniques allow arming antibodies with various effector molecules. However, these techniques are utilizing the most frequently used amino acid residues for bioconjugation, such as cysteine and lysine. These bioconjugation approaches generate heterogeneous products with different functional and safety profiles. This is mainly due to the abundance of lysine and cysteine side chains. To overcome these limitations, different site-direct conjugation methods have been applied to arm the antibodies with therapeutic or diagnostics molecules to generate unified antibody conjugates with tailored properties. This review summarizes some of the enzyme-based site-specific conjugation approaches.
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15
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Design and construction of chimeric linker library with controllable flexibilities for precision protein engineering. Methods Enzymol 2020; 647:23-49. [PMID: 33482990 DOI: 10.1016/bs.mie.2020.12.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Linkers play essential roles in the engineering of fusion proteins, and have been extensively demonstrated to affect protein properties such as expression level, solubility, and biological functions. For linker design and optimization, one of the key factors is the flexibility or rigidity of linkers, which describes the tendency of a linker to maintain a stable conformation when expressed, and can directly contribute to the physical distance between domains of a fusion protein. In this chapter, we discuss the design and engineering of linkers in fusion proteins, and describe a library-based method for optimization of linker flexibility. This approach is based on chimeric linkers, which are composed of both flexible and rigid (helix-forming) linker motifs. We demonstrate that the chimeric linker library capable of controlling the flexibility in a wide range can fill the gap between flexible and rigid linkers by molecular dynamics simulation and fluorescence resonance energy transfer experiments, as well as its applications in fusion protein optimization.
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16
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Woitok M, Grieger E, Akinrinmade OA, Bethke S, Pham AT, Stein C, Fendel R, Fischer R, Barth S, Niesen J. Using the SNAP-Tag technology to easily measure and demonstrate apoptotic changes in cancer and blood cells with different dyes. PLoS One 2020; 15:e0243286. [PMID: 33270761 PMCID: PMC7714129 DOI: 10.1371/journal.pone.0243286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 11/18/2020] [Indexed: 11/18/2022] Open
Abstract
In vitro and ex vivo development of novel therapeutic agents requires reliable and accurate analyses of the cell conditions they were preclinical tested for, such as apoptosis. The detection of apoptotic cells by annexin V (AV) coupled to fluorophores has often shown limitations in the choice of the dye due to interference with other fluorescent-labeled cell markers. The SNAP-tag technology is an easy, rapid and versatile method for functionalization of proteins and was therefore used for labeling AV with various fluorophores. We generated the fusion protein AV-SNAP and analyzed its capacity for the specific display of apoptotic cells in various assays with therapeutic agents. AV-SNAP showed an efficient coupling reaction with five different fluorescent dyes. Two selected fluorophores were tested with suspension, adherent and peripheral blood cells, treated by heat-shock or apoptosis-inducing therapeutic agents. Flow cytometry analysis of apoptotic cells revealed a strong visualization using AV-SNAP coupled to these two fluorophores exemplary, which was comparable to a commercial AV-Assay-kit. The combination of the apoptosis-specific binding protein AV with the SNAP-tag provides a novel solid method to facilitate protein labeling using several, easy to change, fluorescent dyes at once. It avoids high costs and allows an ordinary exchange of dyes and easier use of other fluorescent-labeled cell markers, which is of high interest for the preclinical testing of therapeutic agents in e.g. cancer research.
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Affiliation(s)
- Mira Woitok
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Molecular Biotechnology (Biology VII), RWTH Aachen University, Aachen, Germany
| | - Elena Grieger
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
| | - Olusiji A. Akinrinmade
- Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, University of Cape Town, Observatory, Cape Town, South Africa
| | - Susanne Bethke
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Molecular Biotechnology (Biology VII), RWTH Aachen University, Aachen, Germany
| | - Anh Tuan Pham
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
| | - Christoph Stein
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
| | - Rolf Fendel
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Rainer Fischer
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Molecular Biotechnology (Biology VII), RWTH Aachen University, Aachen, Germany
| | - Stefan Barth
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, University of Cape Town, Observatory, Cape Town, South Africa
| | - Judith Niesen
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Department of Pediatric Hematology and Oncology, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
- * E-mail:
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17
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Gomez S, Tsung A, Hu Z. Current Targets and Bioconjugation Strategies in Photodynamic Diagnosis and Therapy of Cancer. Molecules 2020; 25:E4964. [PMID: 33121022 PMCID: PMC7662882 DOI: 10.3390/molecules25214964] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/18/2020] [Accepted: 10/25/2020] [Indexed: 02/07/2023] Open
Abstract
Photodynamic diagnosis (PDD) and therapy (PDT) are emerging, non/minimally invasive techniques for cancer diagnosis and treatment. Both techniques require a photosensitizer and light to visualize or destroy cancer cells. However, a limitation of conventional, non-targeted PDT is poor selectivity, causing side effects. The bioconjugation of a photosensitizer to a tumor-targeting molecule, such as an antibody or a ligand peptide, is a way to improve selectivity. The bioconjugation strategy can generate a tumor-targeting photosensitizer conjugate specific for cancer cells, or ideally, for multiple tumor compartments to improve selectivity and efficacy, such as cancer stem cells and tumor neovasculature within the tumor microenvironment. If successful, such targeted photosensitizer conjugates can also be used for specific visualization and detection of cancer cells and/or tumor angiogenesis (an early event in tumorigenesis) with the hope of an early diagnosis of cancer. The purpose of this review is to summarize some current promising target molecules, e.g., tissue factor (also known as CD142), and the currently used bioconjugation strategies in PDT and PDD, with a focus on newly developed protein photosensitizers. These are genetically engineered photosensitizers, with the possibility of generating a fusion protein photosensitizer by recombinant DNA technology for both PDT and PDD without the need of chemical conjugation. We believe that providing an overview of promising targets and bioconjugation strategies will aid in driving research in this field forward towards more effective, less toxic, and non- or minimally invasive treatment and diagnosis options for cancer patients.
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Affiliation(s)
- Salvador Gomez
- The James-Comprehensive Cancer Center, Division of Surgical Oncology Department of Surgery, College of Medicine, The Ohio State University, 460 W 12th Ave, Columbus, OH 43210, USA; (S.G.); (A.T.)
- College of Medicine, The Ohio State University, 370 W 9th Ave, Columbus, OH 43210, USA
| | - Allan Tsung
- The James-Comprehensive Cancer Center, Division of Surgical Oncology Department of Surgery, College of Medicine, The Ohio State University, 460 W 12th Ave, Columbus, OH 43210, USA; (S.G.); (A.T.)
| | - Zhiwei Hu
- The James-Comprehensive Cancer Center, Division of Surgical Oncology Department of Surgery, College of Medicine, The Ohio State University, 460 W 12th Ave, Columbus, OH 43210, USA; (S.G.); (A.T.)
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Lei H, Dong L, Li Y, Zhang J, Chen H, Wu J, Zhang Y, Fan Q, Xue B, Qin M, Chen B, Cao Y, Wang W. Stretchable hydrogels with low hysteresis and anti-fatigue fracture based on polyprotein cross-linkers. Nat Commun 2020; 11:4032. [PMID: 32788575 PMCID: PMC7423981 DOI: 10.1038/s41467-020-17877-z] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 07/22/2020] [Indexed: 02/07/2023] Open
Abstract
Hydrogel-based devices are widely used as flexible electronics, biosensors, soft robots, and intelligent human-machine interfaces. In these applications, high stretchability, low hysteresis, and anti-fatigue fracture are essential but can be rarely met in the same hydrogels simultaneously. Here, we demonstrate a hydrogel design using tandem-repeat proteins as the cross-linkers and random coiled polymers as the percolating network. Such a design allows the polyprotein cross-linkers only to experience considerable forces at the fracture zone and unfold to prevent crack propagation. Thus, we are able to decouple the hysteresis-toughness correlation and create hydrogels of high stretchability (~1100%), low hysteresis (< 5%), and high fracture toughness (~900 J m-2). Moreover, the hydrogels show a high fatigue threshold of ~126 J m-2 and can undergo 5000 load-unload cycles up to 500% strain without noticeable mechanical changes. Our study provides a general route to decouple network elasticity and local mechanical response in synthetic hydrogels.
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Affiliation(s)
- Hai Lei
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China
- Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210093, China
| | - Liang Dong
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Ying Li
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China
- Institute of Advanced Materials and Flexible Electronics (IAMFE), School of Chemistry and Materials Science, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Junsheng Zhang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Huiyan Chen
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Junhua Wu
- Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, 210093, China
| | - Yu Zhang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Qiyang Fan
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Hangzhou, 310027, China
| | - Bin Xue
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Meng Qin
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Bin Chen
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Hangzhou, 310027, China
| | - Yi Cao
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China.
- Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210093, China.
| | - Wei Wang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China
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