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Becker K, Weigelt CM, Fuchs H, Viollet C, Rust W, Wyatt H, Huber J, Lamla T, Fernandez-Albert F, Simon E, Zippel N, Bakker RA, Klein H, Redemann NH. Transcriptome analysis of AAV-induced retinopathy models expressing human VEGF, TNF-α, and IL-6 in murine eyes. Sci Rep 2022; 12:19395. [PMID: 36371417 PMCID: PMC9653384 DOI: 10.1038/s41598-022-23065-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 10/25/2022] [Indexed: 11/14/2022] Open
Abstract
Retinopathies are multifactorial diseases with complex pathologies that eventually lead to vision loss. Animal models facilitate the understanding of the pathophysiology and identification of novel treatment options. However, each animal model reflects only specific disease aspects and understanding of the specific molecular changes in most disease models is limited. Here, we conducted transcriptome analysis of murine ocular tissue transduced with recombinant Adeno-associated viruses (AAVs) expressing either human VEGF-A, TNF-α, or IL-6. VEGF expression led to a distinct regulation of extracellular matrix (ECM)-associated genes. In contrast, both TNF-α and IL-6 led to more comparable gene expression changes in interleukin signaling, and the complement cascade, with TNF-α-induced changes being more pronounced. Furthermore, integration of single cell RNA-Sequencing data suggested an increase of endothelial cell-specific marker genes by VEGF, while TNF-α expression increased the expression T-cell markers. Both TNF-α and IL-6 expression led to an increase in macrophage markers. Finally, transcriptomic changes in AAV-VEGF treated mice largely overlapped with gene expression changes observed in the oxygen-induced retinopathy model, especially regarding ECM components and endothelial cell-specific gene expression. Altogether, our study represents a valuable investigation of gene expression changes induced by VEGF, TNF-α, and IL-6 and will aid researchers in selecting appropriate animal models for retinopathies based on their agreement with the human pathophysiology.
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Affiliation(s)
- Kolja Becker
- grid.420061.10000 0001 2171 7500Global Computational Biology & Digital Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Carina M. Weigelt
- grid.420061.10000 0001 2171 7500Cardiometabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Holger Fuchs
- grid.420061.10000 0001 2171 7500Cardiometabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Coralie Viollet
- grid.420061.10000 0001 2171 7500Global Computational Biology & Digital Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Werner Rust
- grid.420061.10000 0001 2171 7500Global Computational Biology & Digital Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Hannah Wyatt
- grid.420061.10000 0001 2171 7500Drug Discovery Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Jochen Huber
- grid.420061.10000 0001 2171 7500Clinical Development & Operations Corporate, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Thorsten Lamla
- grid.420061.10000 0001 2171 7500Drug Discovery Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Francesc Fernandez-Albert
- grid.420061.10000 0001 2171 7500Global Computational Biology & Digital Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Eric Simon
- grid.420061.10000 0001 2171 7500Global Computational Biology & Digital Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Nina Zippel
- grid.420061.10000 0001 2171 7500Cardiometabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Remko A. Bakker
- grid.420061.10000 0001 2171 7500Cardiometabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Holger Klein
- grid.420061.10000 0001 2171 7500Global Computational Biology & Digital Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
| | - Norbert H. Redemann
- grid.420061.10000 0001 2171 7500Cardiometabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany
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Associations between the Complement System and Choroidal Neovascularization in Wet Age-Related Macular Degeneration. Int J Mol Sci 2020; 21:ijms21249752. [PMID: 33371261 PMCID: PMC7765894 DOI: 10.3390/ijms21249752] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/14/2020] [Accepted: 12/17/2020] [Indexed: 12/16/2022] Open
Abstract
Age-related macular degeneration (AMD) is the leading cause of blindness affecting the elderly in the Western world. The most severe form of AMD, wet AMD (wAMD), is characterized by choroidal neovascularization (CNV) and acute vision loss. The current treatment for these patients comprises monthly intravitreal injections of anti-vascular endothelial growth factor (VEGF) antibodies, but this treatment is expensive, uncomfortable for the patient, and only effective in some individuals. AMD is a complex disease that has strong associations with the complement system. All three initiating complement pathways may be relevant in CNV formation, but most evidence indicates a major role for the alternative pathway (AP) and for the terminal complement complex, as well as certain complement peptides generated upon complement activation. Since the complement system is associated with AMD and CNV, a complement inhibitor may be a therapeutic option for patients with wAMD. The aim of this review is to (i) reflect on the possible complement targets in the context of wAMD pathology, (ii) investigate the results of prior clinical trials with complement inhibitors for wAMD patients, and (iii) outline important considerations when developing a future strategy for the treatment of wAMD.
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Wu J, Sun X. Complement system and age-related macular degeneration: drugs and challenges. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:2413-2425. [PMID: 31409975 PMCID: PMC6650090 DOI: 10.2147/dddt.s206355] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 07/01/2019] [Indexed: 01/08/2023]
Abstract
Age-related macular degeneration (AMD) is directly attributable to vision loss, posing significant pressure on public health. AMD is recognized to be a multi-factorial disease and among them, complement system is under heated discussion in recent years. In this review, we start with an overview of complement pathways involved in AMD and their therapies correspondingly. Finally, we discuss the development of the therapeutics existed now. Also, we enclose a list of drugs undergoing clinical trials.
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Affiliation(s)
- Jiali Wu
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Xiaodong Sun
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.,Shanghai Key Laboratory of Fundus Disease, Shanghai, People's Republic of China.,Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, People's Republic of China
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Brockmann C, Kociok N, Dege S, Davids AM, Brockmann T, Miller KR, Joussen AM. Local partial depletion of CD11b + cells and their influence on choroidal neovascularization using the CD11b-HSVTK mouse model. Acta Ophthalmol 2018. [PMID: 29536657 DOI: 10.1111/aos.13716] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE To assess the influence of retinal macrophages and microglia on the formation of choroidal neovascularization (CNV). Therefore, we used a transgenic mouse (CD11b-HSVTK) in which the application of ganciclovir (GCV) results in a depletion of CD11b+ cells. METHODS We first investigated if a local depletion of CD11b+ macrophages and microglia in the retina is feasible. In a second step, the influence of CD11b+ cell depletion on CNV formation was analysed. One eye of each CD11b-HSVTK mouse was injected with GCV, and the fellow eye received sodium chloride solution (NaCl). Cell counting was performed at day 3 and 7 (one injection) or at day 14 and 21 (two injections). Choroidal neovascularization (CNV) was induced by argon laser and analysed at day 14. RESULTS The most effective CD11b+ cell depletion was achieved 7 days after a single injection and 14 days after two injections of GCV. After two injections of GCV, we found a significant reduction of CD11b+ cells in central (52 ± 23.9 cells/mm2 ) and peripheral retina (53 ± 20.6 cells/mm2 ); compared to eyes received NaCl (216 ± 49.0 and 210 ± 50.5 cells/mm2 , p < 0.001, respectively). Regarding CNV areas, no statistical significance was found between the groups. CONCLUSION The CD11b-HSVTK mouse is a feasible model for a local depletion of CD11b+ cells in the retina. Nevertheless, only a partial depletion of CD11b+ cells could be achieved compared to baseline data without any intravitreal injections. Our results did not reveal a significant reduction in CNV areas. In the light of previous knowledge, the potential influence of systemic immune cells on CNV formation might be more relevant than expected.
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Affiliation(s)
- Claudia Brockmann
- Department of Ophthalmology; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health; Berlin Germany
- Berlin Institute of Health (BIH); Berlin Germany
| | - Norbert Kociok
- Department of Ophthalmology; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health; Berlin Germany
| | - Sabrina Dege
- Department of Ophthalmology; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health; Berlin Germany
| | - Anja-Maria Davids
- Department of Ophthalmology; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health; Berlin Germany
| | - Tobias Brockmann
- Department of Ophthalmology; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health; Berlin Germany
- Berlin Institute of Health (BIH); Berlin Germany
| | - Kelly R. Miller
- Department of Neuropathology; Charite - Universitätsmedizin Berlin; Corporate Member of Freie Universität Berlin; Humboldt-Universität Berlin, and Berlin Institute of Health; Berlin Germany
| | - Antonia M. Joussen
- Department of Ophthalmology; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health; Berlin Germany
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Toomey CB, Landowski M, Klingeborn M, Kelly U, Deans J, Dong H, Harrabi O, Van Blarcom T, Yeung YA, Grishanin R, Lin JC, Saban DR, Bowes Rickman C. Effect of Anti-C5a Therapy in a Murine Model of Early/Intermediate Dry Age-Related Macular Degeneration. Invest Ophthalmol Vis Sci 2018; 59:662-673. [PMID: 29392311 PMCID: PMC5795897 DOI: 10.1167/iovs.17-23134] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Purpose A large body of evidence supports a central role for complement activation in the pathobiology of age-related macular degeneration (AMD), including plasma complement component 5a (C5a). Interestingly, C5a is a chemotactic agent for monocytes, a cell type also shown to contribute to AMD. However, the role monocytes play in the pathogenesis of “dry” AMD and the pharmacologic potential of targeting C5a to regulate these cells are unclear. We addressed these questions via C5a blockade in a unique model of early/intermediate dry AMD and large panel flow cytometry to immunophenotype monocytic involvement. Methods Heterozygous complement factor H (Cfh+/−) mice aged to 90 weeks were fed a high-fat, cholesterol-enriched diet (Cfh+/−∼HFC) for 8 weeks and were given weekly intraperitoneal injections of 30 mg/kg anti-C5a (4C9, Pfizer). Flow cytometry, retinal pigmented epithelium (RPE) flat mounts, and electroretinograms were used to characterize anti-C5a treatment. Results Aged Cfh+/− mice developed RPE damage, sub-RPE basal laminar deposits, and attenuation of visual function and immune cell recruitment to the choroid that was accompanied by expression of inflammatory and extracellular matrix remodeling genes following 8 weeks of HFC diet. Concomitant systemic administration of an anti-C5a antibody successfully inhibited local recruitment of mononuclear phagocytes to the choroid–RPE interface but did not ameliorate these AMD-like pathologies in this mouse model. Conclusions These results show that immunotherapy targeting C5a is not sufficient to block the development of the AMD-like pathologies observed in Cfh+/−∼HFC mice and suggest that other complement components or molecules/mechanisms may be driving “early” and “intermediate” AMD pathologies.
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Affiliation(s)
- Christopher B Toomey
- Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina, United States.,Department of Cell Biology, Duke University Medical Center, Durham, North Carolina, United States.,Shiley Eye Institute, Department of Ophthalmology, University of California-San Diego, San Diego, California, United States
| | - Michael Landowski
- Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina, United States
| | - Mikael Klingeborn
- Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina, United States
| | - Una Kelly
- Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina, United States
| | - John Deans
- Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina, United States
| | - Holly Dong
- Rinat, Pfizer Inc, South San Francisco, California, United States
| | - Ons Harrabi
- Rinat, Pfizer Inc, South San Francisco, California, United States
| | | | - Yik Andy Yeung
- Rinat, Pfizer Inc, South San Francisco, California, United States
| | - Ruslan Grishanin
- Rinat, Pfizer Inc, South San Francisco, California, United States
| | - John C Lin
- Rinat, Pfizer Inc, South San Francisco, California, United States
| | - Daniel R Saban
- Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina, United States.,Department of Immunology, Duke University Medical Center, Durham, North Carolina, United States
| | - Catherine Bowes Rickman
- Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina, United States.,Department of Cell Biology, Duke University Medical Center, Durham, North Carolina, United States
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Jo DH, Kim JH, Yang W, Kim H, Chang S, Kim D, Chang M, Lee K, Chung J, Kim JH. Anti-complement component 5 antibody targeting MG4 domain inhibits choroidal neovascularization. Oncotarget 2018; 8:45506-45516. [PMID: 28477014 PMCID: PMC5542204 DOI: 10.18632/oncotarget.17221] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 03/15/2017] [Indexed: 12/27/2022] Open
Abstract
Age-related macular degeneration (AMD) is one of the main causes of visual impairment in adults. Visual deterioration is more prominent in neovascular AMD with choroidal neovascularization (CNV). Clinical and postmortem studies suggested that complement system activation might induce CNV. In this study, we demonstrated that an anti-mouse complement component 5 (C5) antibody targeting MG4 domain of β chain effectively inhibited CNV which was induced by laser photocoagulation in mice. The targeted epitope of this anti-C5 antibody was different from that of currently utilized anti-C5 antibody (eculizumab) in the MG7 domain in which a single nucleotide polymorphism (R885H/C) results in poor response to eculizumab. Even with targeting MG4 domain, this anti-C5 antibody reduced production of C5a, monocyte chemoattractant protein-1 and vascular endothelial growth factor to prevent infiltration of F4/80-positive cells into CNV lesions and formation of CNV. Furthermore, anti-C5 antibody targeting MG4 domain induced no definite toxicity in normal retina. These results demonstrated that anti-C5 antibody targeting MG4 domain inhibited CNV in neovascular AMD.
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Affiliation(s)
- Dong Hyun Jo
- Fight Against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea.,Department of Biomedical Sciences and Protein Metabolism, Medical Research Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jin Hyoung Kim
- Fight Against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Wonjun Yang
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul, Republic of Korea.,Department of Cancer Biology, Seoul National University College of Medicine, Seoul, Republic of Korea.,Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hyori Kim
- Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - Shinjae Chang
- Biotechnology Research Institute, Celltrion, Inc., Incheon, Republic of Korea
| | - Dongjo Kim
- Biotechnology Research Institute, Celltrion, Inc., Incheon, Republic of Korea
| | - Minseok Chang
- Biotechnology Research Institute, Celltrion, Inc., Incheon, Republic of Korea
| | - Kihwang Lee
- Department of Ophthalmology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Junho Chung
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul, Republic of Korea.,Department of Cancer Biology, Seoul National University College of Medicine, Seoul, Republic of Korea.,Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jeong Hun Kim
- Fight Against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea.,Department of Biomedical Sciences and Protein Metabolism, Medical Research Center, Seoul National University College of Medicine, Seoul, Republic of Korea.,Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Republic of Korea
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7
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Brockmann C, Dege S, Crespo-Garcia S, Kociok N, Brockmann T, Strauß O, Joussen AM. Spatial distribution of CD115 + and CD11b + cells and their temporal activation during oxygen-induced retinopathy in mice. Graefes Arch Clin Exp Ophthalmol 2017; 256:313-323. [PMID: 29185100 DOI: 10.1007/s00417-017-3845-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 10/11/2017] [Accepted: 11/04/2017] [Indexed: 12/25/2022] Open
Abstract
PURPOSE The model of oxygen-induced retinopathy (OIR) is widely used to analyze pathomechanisms in retinal neovascularization. Previous studies have shown that macrophages (MP) play a key role in vessel formation in OIR, the influence of microglia (MG) having been discussed. The aim of our study was to analyze the spatial and temporal distribution and activation of MP/MG expressing CD115 and CD11b during the process of neovascularization in OIR. METHODS We used MacGreen mice expressing the green fluorescence protein (GFP) under the promoter for CD115. CD115+ cells were investigated in vivo by scanning laser ophthalmoscopy at postnatal days (P) 17 and 21 in MacGreen mice with OIR (75% oxygen from P7 to P12), and were compared to MacGreen room-air controls. In addition MP/MG were examined ex vivo using immunohistochemistry for CD11b+ detection on retinal flatmounts at P14, P17, and P21 of wild type mice with OIR. RESULTS In-vivo imaging revealed the highest density of activated MP/MG in tuft areas at P17 of MacGreen mice with OIR. Tufts and regions with a high density of CD115+ cells were detected close to veins, rather to arteries. In peripheral, fully vascularized areas, the distribution of CD115+ cells in MacGreen mice with OIR was similar to MacGreen room-air controls. Correspondingly, immunohistochemical analyses of retinal flatmounts from wild type mice with OIR induction revealed that the number of CD11b+ cells significantly varies between vascular, avascular, and tuft areas as well as between the retinal layers. Activated CD11b+ cells were almost exclusively found in avascular areas and tufts of wild type mice with OIR induction; here, the proportion of activated cells related to the total number of CD11b+ cells remained stable over the course of time. CONCLUSIONS Using two different approaches to monitor MP/MG cells, our findings demonstrated that MP/MG concentrate within pathologically vascularized areas during OIR. We were able to clarify that reactive changes of CD11b+ cell distribution to OIR primarily occur in the deep retinal layers. Furthermore, we found the highest proportion of activated CD11b+ cells in regions with pathologic neovascularization processes. Our findings support previous reports about activated MP/MG guiding revascularization in avascular areas and playing a key role in the formation and regression of neovascular tufts.
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Affiliation(s)
- Claudia Brockmann
- Department of Ophthalmology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, Augustenburger Platz 1, 13353, Berlin, Germany.
- Berlin Institute of Health (BIH), Berlin, Germany.
| | - Sabrina Dege
- Department of Ophthalmology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Sergio Crespo-Garcia
- Department of Ophthalmology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Norbert Kociok
- Department of Ophthalmology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Tobias Brockmann
- Department of Ophthalmology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, Augustenburger Platz 1, 13353, Berlin, Germany
- Berlin Institute of Health (BIH), Berlin, Germany
| | - Olaf Strauß
- Department of Ophthalmology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Antonia M Joussen
- Department of Ophthalmology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, Augustenburger Platz 1, 13353, Berlin, Germany
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Aptamer based ultrasensitive determination of the β-adrenergic agonist ractopamine using PicoGreen as a fluorescent DNA probe. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-2032-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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9
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Zhu C, Zhao Y, Yan M, Huang Y, Yan J, Bai W, Chen A. A sandwich dipstick assay for ATP detection based on split aptamer fragments. Anal Bioanal Chem 2016; 408:4151-8. [PMID: 27052777 DOI: 10.1007/s00216-016-9506-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 03/04/2016] [Accepted: 03/21/2016] [Indexed: 12/01/2022]
Abstract
Aptamer-based strip assay is an easy, highly efficient and low-cost detection method, which has been developed and easily applied to onsite detection. A new sensitive sandwich dipstick assay for adenosine triphosphate (ATP) detection was successfully developed based on specific recognition between split aptamer fragments and the target. In this method, the thiolated aptamer was first conjugated to the surface of gold nanoparticles (AuNPs), while the biotin-aptamer was immobilized on the surface of a nitrocellulose filter in the test line. In the presence of ATP, the thiol-aptamer/ATP/biotin-aptamer complexes were generated, which led to an obvious increase in optical signals at the test line. Under the optimal determination conditions, an excellent linear logarithmic response to the ATP concentration was obtained within the range of 0.5 μM to 5 mM. The limit of detection (LOD) of 0.5 μM was reached at a signal-to-noise ratio of 3. The dipstick assay showed a good average recovery of 96-108 % with the RSD of less than 20 % in urine samples. The proposed method exhibited high specificity against other nucleotides such as the uridine triphosphate (UTP), cytidine triphosphate (CTP), and guanosine triphosphate (GTP). The results indicated that the dipstick strip may be considered as an inexpensive screening tool for onsite ATP determination. Graphical Abstract A simple split aptamer fragments based sandwich-type dipstick assay was developed for ATP detection.
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Affiliation(s)
- Chao Zhu
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Yan Zhao
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Mengmeng Yan
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Yafei Huang
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China.,College of Food Science and Technology, Hainan University, Haikou, Hainan, 570228, China
| | - Jiao Yan
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China.,College of Food Science and Technology, Hainan University, Haikou, Hainan, 570228, China
| | - Wenhui Bai
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Ailiang Chen
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China. .,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China.
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10
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Drolet DW, Green LS, Gold L, Janjic N. Fit for the Eye: Aptamers in Ocular Disorders. Nucleic Acid Ther 2016; 26:127-46. [PMID: 26757406 PMCID: PMC4900223 DOI: 10.1089/nat.2015.0573] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
For any new class of therapeutics, there are certain types of indications that represent a natural fit. For nucleic acid ligands in general, and aptamers in particular, the eye has historically been an attractive site for therapeutic intervention. In this review, we recount the discovery and early development of three aptamers designated for use in ophthalmology, one approved (Macugen), and two in late-stage development (Fovista and Zimura). Every one of these molecules was originally intended for other indications. Key improvements in technology, specifically with regard to libraries used for in vitro selection and subsequent chemical optimization of aptamers, have played an important role in allowing the identification of development candidates with suitable properties. The lessons learned from the selection of these molecules are valuable for informing us about the many remaining opportunities for aptamer-based therapeutics in ophthalmology as well as for identifying additional indications for which aptamers as a class of therapeutics have distinct advantages.
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