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Zou T, Jiang S, Zhang Y, Liu J, Yi B, Qi Y, Dissanayaka WL, Zhang C. In Situ Oxygen Generation Enhances the SCAP Survival in Hydrogel Constructs. J Dent Res 2021; 100:1127-1135. [PMID: 34328028 DOI: 10.1177/00220345211027155] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Prolonged and severe hypoxia is the main cause of death of transplanted cells prior to the establishment of functional circulation. In situ generation of oxygen by oxygen-producing scaffolds-a unique solution that could produce and deliver oxygen to the adjacent cells independently of blood perfusion-has attracted considerable attention to enhance the survivability of the transplanted cells. However, the application of oxygen-generating scaffolds for facilitating cell survival in pulp-like tissue regeneration is yet to be explored. In this study, gelatin methacryloyl (GelMA)-a biocompatible scaffolding material that closely mimics the native extracellular matrix and is conducive to cell proliferation and differentiation-was used to fabricate oxygen-generating scaffolds by loading various concentrations of CaO2. The CaO2 distribution, topography, swelling, and pore size of CaO2-GelMA hydrogels were characterized in detail. The release of O2 by the scaffold and the viability, spreading, and proliferation of stem cells from apical papilla (SCAPs) encapsulated in the GelMA hydrogels with various concentrations of CaO2 under hypoxia were evaluated. In addition, cellular constructs were engineered into root canals, and cell viability within the apical, middle, and coronal portions was assessed. Our findings showed that 0.5% CaO2-GelMA was sufficient to supply in situ oxygen for maintaining the embedded SCAP viability for 1 wk. Furthermore, the 0.5% CaO2-GelMA hydrogels improved the survivability of SCAPs within the coronal portion of the engineered cellular constructs within the root canals. This work demonstrated that 0.5% CaO2-GelMA hydrogels offer a potential promising scaffold that enhances survival of the embedded SCAPs in endodontic regeneration.
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Affiliation(s)
- T Zou
- Restorative Dental Science, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - S Jiang
- School of Stomatology, Shenzhen University Health Science Center, Shenzhen, China
| | - Y Zhang
- Restorative Dental Science, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - J Liu
- Restorative Dental Science, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - B Yi
- Restorative Dental Science, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Y Qi
- Restorative Dental Science, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - W L Dissanayaka
- Restorative Dental Science, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - C Zhang
- Restorative Dental Science, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
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2
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Hsieh TE, Lin SJ, Chen LC, Chen CC, Lai PL, Huang CC. Optimizing an Injectable Composite Oxygen-Generating System for Relieving Tissue Hypoxia. Front Bioeng Biotechnol 2020; 8:511. [PMID: 32528945 PMCID: PMC7264163 DOI: 10.3389/fbioe.2020.00511] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 04/30/2020] [Indexed: 12/11/2022] Open
Abstract
Oxygen deficiency resulting from bone fracture-induced vascular disruption leads to massive cell death and delayed osteoblast differentiation, ultimately impairing new bone formation and fracture healing. Enhancing local tissue oxygenation can help promote bone regeneration. In this work, an injectable composite oxygen-generating system consisting of calcium peroxide (CaO2)/manganese dioxide (MnO2)-encapsulated poly lactic-co-glycolic acid (PLGA) microparticles (CaO2 + MnO2@PLGA MPs) is proposed for the local delivery of oxygen. By utilizing a series of methodologies, the impacts of each component used for MP fabrication on the oxygen release behavior and cytotoxicity of the CaO2 + MnO2@ PLGA MPs are thoroughly investigated. Our analytical data obtained from in vitro studies indicate that the optimized CaO2 + MnO2@PLGA MPs developed in this study can effectively relieve the hypoxia of preosteoblast MC3T3-E1 cells that are grown under low oxygen tension and promote their osteogenic differentiation, thus holding great promise in enhancing fractural healing by increasing tissue oxygenation.
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Affiliation(s)
- Tai-En Hsieh
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Sheng-Ju Lin
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Li-Chi Chen
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan.,Department of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Chun-Chieh Chen
- Department of Orthopaedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, Taiwan.,Bone and Joint Research Center, Linkou Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Po-Liang Lai
- Department of Orthopaedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, Taiwan.,Bone and Joint Research Center, Linkou Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Chieh-Cheng Huang
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan
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3
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Khorshidi S, Karkhaneh A, Bonakdar S. Oxygen-releasing nanofibers for breathable bone tissue engineering application. J Biomater Appl 2020; 35:72-82. [DOI: 10.1177/0885328220913051] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Oxygen is a vital molecule for cell and tissue processes. Electrospun fibers have been extensively used as drug loading carriers due to possibility of well control over drug release with modulating fiber properties. However, they have not been used as depots for oxygen release. In the present study, an oxygen-releasing nanofibrous scaffold has been developed by electrospinning of polylactic acid/nano-calcium peroxide suspension with different polylactic acid concentrations (6.5 and 13% w/v). The electrospun fibers with calcium peroxide cargo provided oxygen content of 30–94 mmHg in a period of 14 days which lies well within the oxygen level of osseous tissue. The release profile of 13% polylactic acid fibers was different with that of 6.5% fibers with respects to the initial content of released oxygen and the release rate. Not only did 13% fibers supply oxygen with a slower rate, but also they resulted in a lower burst release of oxygen. Cell culture studies in hypoxia corroborated that 13% polylactic acid fibers better preserve cell viability comparing 6.5% counterparts as perceived by MTT assay. Moreover, they endowed more favored milieu for adherence, arrangement and migration of mesenchymal stem cells as confirmed by microscopy images. The oxygen-releasing fibers equally affected alkaline phosphatase, osteocalcin, and calcium deposition by mesenchymal stem cells most likely due to interplay between topographical and metabolic cues offered by 6.5 and 13% formulations.
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Affiliation(s)
- Sajedeh Khorshidi
- Biomedical Engineering Faculty, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Akbar Karkhaneh
- Biomedical Engineering Faculty, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Shahin Bonakdar
- National Cell Bank Department, Pasteur Institute of Iran, Tehran, Iran
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4
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Yang M, Liu H, Wang Y, Wu G, Qiu S, Liu C, Tan Z, Guo J, Zhu L. Hypoxia reduces the osteogenic differentiation of peripheral blood mesenchymal stem cells by upregulating Notch-1 expression. Connect Tissue Res 2019; 60:583-596. [PMID: 31035811 DOI: 10.1080/03008207.2019.1611792] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Purpose: Mesenchymal stem cells (MSCs) seeded on biocompatible scaffolds have therapeutic potential for bone defect repair. However, MSCs can be affected by hypoxia and nutritional deficiency due to a lack of blood vessels in the scaffolds. Here, we explored the effects of hypoxia on MSC differentiation to clarify these mechanisms. Methods: Peripheral blood mesenchymal stem cells (PBMSCs) were cultured in small individual chambers with oxygen concentrations of 1%, 9%, and 21%. Cell proliferation was evaluated by Cell Counting Kit 8 assays, and cell survival was determined using live/dead assays. Scratch assays were performed to evaluate cell migration. Ca2+ deposition/mineralization experiments, reverse transcription quantitative real-time polymerase chain reaction, and Western blotting were performed to assess the osteogenic differentiation of cells. Notch1 expression was downregulated by lentivirus-transfected PBMSCs to observe the effects of Notch1 knockdown on osteogenic gene and protein expression. Results: PBMSCs exposed to hypoxia (1% O2) demonstrated accelerated proliferation, increased migration, and reduced survival in the absence of serum. Although 9% oxygen promoted osteogenic differentiation, the osteogenic differentiation of PBMSCs was significantly reduced by 1% O2, and this effect was associated with increased Notch1 expression. Reducing Notch1 expression using small interfering RNA significantly restored the osteogenic differentiation of PBMSCs. Conclusions: Hypoxia accelerated proliferation, increased migration, and reduced PBMSC differentiation into osteoblasts by increasing Notch1 expression. These findings may contribute to the development of appropriate cell culture or in vivo transplantation conditions to maintain the full osteogenic potential of PBMSCs.
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Affiliation(s)
- Minsheng Yang
- Department of Spine Orthopedics, Zhujiang Hospital, Southern Medical University , Guangzhou , China
| | - Haixin Liu
- People's Hospital of Deyang City , Sichuan , China
| | - Yihan Wang
- Department of Spine Orthopedics, Zhujiang Hospital, Southern Medical University , Guangzhou , China
| | - Guofeng Wu
- Department of Orthopedics, Jingzhou No. 1 People's Hospital and First Affiliated Hospital of Yangtze University , Jingzhou , China
| | - Sujun Qiu
- Department of Spine Orthopedics, Zhujiang Hospital, Southern Medical University , Guangzhou , China
| | - Chun Liu
- Department of Spine Orthopedics, Zhujiang Hospital, Southern Medical University , Guangzhou , China
| | - Zhiwen Tan
- Department of Spine Orthopedics, Zhujiang Hospital, Southern Medical University , Guangzhou , China
| | - Jiasong Guo
- Department of Histology and Embryology, Southern Medical University , Guangzhou , China.,Key Laboratory of Tissue Construction and Detection of Guangdong Province , Guangzhou , China.,Institute of Bone Biology, Academy of Orthopaedics , Guangdong Province , Guangzhou , China
| | - Lixin Zhu
- Department of Spine Orthopedics, Zhujiang Hospital, Southern Medical University , Guangzhou , China
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5
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Kim HY, Kim SY, Lee HY, Lee JH, Rho GJ, Lee HJ, Lee HC, Byun JH, Oh SH. Oxygen-Releasing Microparticles for Cell Survival and Differentiation Ability under Hypoxia for Effective Bone Regeneration. Biomacromolecules 2019; 20:1087-1097. [DOI: 10.1021/acs.biomac.8b01760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ho Yong Kim
- Department of Nanobiomedical Science, Dankook University, Cheonan 31116, Republic of Korea
| | - So Young Kim
- Department of Nanobiomedical Science, Dankook University, Cheonan 31116, Republic of Korea
| | - Hye-Young Lee
- Department of Nanobiomedical Science, Dankook University, Cheonan 31116, Republic of Korea
| | - Jin Ho Lee
- Department of Advanced Materials and Chemical Engineering, Hannam University, Daejeon 34054, Republic of Korea
| | - Gyu-Jin Rho
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Gyeongsang National University, Jinju 52727, Republic of Korea
| | - Hyeon-Jeong Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Gyeongsang National University, Jinju 52727, Republic of Korea
| | - Hee-Chun Lee
- Department of Veterinary Medical Imaging, College of Veterinary Medicine, Gyeongsang National University, Jinju 52727, Republic of Korea
| | - June-Ho Byun
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine, Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju 52727, Republic of Korea
| | - Se Heang Oh
- Department of Nanobiomedical Science, Dankook University, Cheonan 31116, Republic of Korea
- Department of Pharmaceutical Engineering, Dankook University, Cheonan 31116, Republic of Korea
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6
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Rastinfard A, Nazarpak MH, Moztarzadeh F. Controlled chemical synthesis of CaO2 particles coated with polyethylene glycol: characterization of crystallite size and oxygen release kinetics. RSC Adv 2018. [DOI: 10.1039/c7ra08758f] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The oxygen release pattern of CaO2 nanoparticles was biphasic: an initial burst phase for the first 24 hours followed by a descending release rate for three days. The oxygen release rate in the second phase mainly depended on the shrinking-core model for CaO2 hydrolysis.
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Affiliation(s)
- Arghavan Rastinfard
- Department of Biomedical Engineering
- Amirkabir University of Technology
- Tehran 159163-4311
- Iran
| | | | - Fathollah Moztarzadeh
- Department of Biomedical Engineering
- Amirkabir University of Technology
- Tehran 159163-4311
- Iran
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7
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Miclau KR, Brazina SA, Bahney CS, Hankenson KD, Hunt TK, Marcucio RS, Miclau T. Stimulating Fracture Healing in Ischemic Environments: Does Oxygen Direct Stem Cell Fate during Fracture Healing? Front Cell Dev Biol 2017; 5:45. [PMID: 28523266 PMCID: PMC5416746 DOI: 10.3389/fcell.2017.00045] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 04/12/2017] [Indexed: 01/27/2023] Open
Abstract
Bone fractures represent an enormous societal and economic burden as one of the most prevalent causes of disability worldwide. Each year, nearly 15 million people are affected by fractures in the United States alone. Data indicate that the blood supply is critical for fracture healing; as data indicate that concomitant bone and vascular injury are major risk factors for non-union. However, the various role(s) that the vasculature plays remains speculative. Fracture stabilization dictates stem cell fate choices during repair. In stabilized fractures stem cells differentiate directly into osteoblasts and heal the injury by intramembranous ossification. In contrast, in non-stable fractures stem cells differentiate into chondrocytes and the bone heals through endochondral ossification, where a cartilage template transforms into bone as the chondrocytes transform into osteoblasts. One suggested role of the vasculature has been to participate in the stem cell fate decisions due to delivery of oxygen. In stable fractures, the blood vessels are thought to remain intact and promote osteogenesis, while in non-stable fractures, continual disruption of the vasculature creates hypoxia that favors formation of cartilage, which is avascular. However, recent data suggests that non-stable fractures are more vascularized than stable fractures, that oxygen does not appear associated with differentiation of stem cells into chondrocytes and osteoblasts, that cartilage is not hypoxic, and that oxygen, not sustained hypoxia, is required for angiogenesis. These unexpected results, which contrast other published studies, are indicative of the need to better understand the complex, spatio-temporal regulation of vascularization and oxygenation in fracture healing. This work has also revealed that oxygen, along with the promotion of angiogenesis, may be novel adjuvants that can stimulate healing in select patient populations.
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Affiliation(s)
- Katherine R Miclau
- Department of Orthopaedic Surgery, University of CaliforniaSan Francisco, CA, USA.,Zuckerberg San Francisco General Hospital, Orthopaedic Trauma InstituteSan Francisco, CA, USA.,Harvard CollegeCambridge, MA, USA
| | - Sloane A Brazina
- Department of Orthopaedic Surgery, University of CaliforniaSan Francisco, CA, USA.,Zuckerberg San Francisco General Hospital, Orthopaedic Trauma InstituteSan Francisco, CA, USA
| | - Chelsea S Bahney
- Department of Orthopaedic Surgery, University of CaliforniaSan Francisco, CA, USA.,Zuckerberg San Francisco General Hospital, Orthopaedic Trauma InstituteSan Francisco, CA, USA
| | - Kurt D Hankenson
- Department of Small Animal Clinical Science and Department of Physiology, Michigan State UniversityEast Lansing, MI, USA.,Department of Orthopaedic Surgery, University of PennsylvaniaPhiladelphia, PA, USA
| | - Thomas K Hunt
- Department of Surgery, University of CaliforniaSan Francisco, CA, USA
| | - Ralph S Marcucio
- Department of Orthopaedic Surgery, University of CaliforniaSan Francisco, CA, USA.,Zuckerberg San Francisco General Hospital, Orthopaedic Trauma InstituteSan Francisco, CA, USA
| | - Theodore Miclau
- Department of Orthopaedic Surgery, University of CaliforniaSan Francisco, CA, USA.,Zuckerberg San Francisco General Hospital, Orthopaedic Trauma InstituteSan Francisco, CA, USA
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8
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Callaghan S, Filatov MA, Sitte E, Savoie H, Boyle RW, Flanagan KJ, Senge MO. Delayed release singlet oxygen sensitizers based on pyridone-appended porphyrins. Photochem Photobiol Sci 2017; 16:1371-1374. [DOI: 10.1039/c7pp00244k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new type of porphyrin photosensitizer capable of generating singlet oxygen upon irradiation, storing it through binding to pyridone subunits, followed by slow release at 20–40 °C, is reported.
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Affiliation(s)
- Susan Callaghan
- School of Chemistry
- SFI Tetrapyrrole Laboratory
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- The University of Dublin
| | - Mikhail A. Filatov
- School of Chemistry
- SFI Tetrapyrrole Laboratory
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- The University of Dublin
| | - Elisabeth Sitte
- School of Chemistry
- SFI Tetrapyrrole Laboratory
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- The University of Dublin
| | - Huguette Savoie
- Department of Chemistry
- University of Hull
- Kingston-upon-Hull
- UK
| | - Ross W. Boyle
- Department of Chemistry
- University of Hull
- Kingston-upon-Hull
- UK
| | - Keith J. Flanagan
- School of Chemistry
- SFI Tetrapyrrole Laboratory
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- The University of Dublin
| | - Mathias O. Senge
- School of Chemistry
- SFI Tetrapyrrole Laboratory
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- The University of Dublin
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Lee HY, Kim HW, Lee JH, Oh SH. Controlling oxygen release from hollow microparticles for prolonged cell survival under hypoxic environment. Biomaterials 2015; 53:583-91. [DOI: 10.1016/j.biomaterials.2015.02.117] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 02/17/2015] [Accepted: 02/27/2015] [Indexed: 01/08/2023]
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10
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Benz S, Nötzli S, Siegel JS, Eberli D, Jessen HJ. Controlled Oxygen Release from Pyridone Endoperoxides Promotes Cell Survival under Anoxic Conditions. J Med Chem 2013; 56:10171-82. [DOI: 10.1021/jm4016137] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sebastian Benz
- Institute of Organic Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Sarah Nötzli
- Department of Urology, University of Zürich, University Hospital, Frauenklinikstrasse 10, 8091 Zürich, Switzerland
| | - Jay S. Siegel
- Institute of Organic Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Daniel Eberli
- Department of Urology, University of Zürich, University Hospital, Frauenklinikstrasse 10, 8091 Zürich, Switzerland
| | - Henning J. Jessen
- Institute of Organic Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
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