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Koçak G, Uyulgan S, Polatlı E, Sarı V, Kahveci B, Bursali A, Binokay L, Reçber T, Nemutlu E, Mardinoğlu A, Karakülah G, Utine CA, Güven S. Generation of Anterior Segment of the Eye Cells from hiPSCs in Microfluidic Platforms. Adv Biol (Weinh) 2024:e2400018. [PMID: 38640945 DOI: 10.1002/adbi.202400018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/10/2024] [Indexed: 04/21/2024]
Abstract
Ophthalmic diseases affect many people, causing partial or total loss of vision and a reduced quality of life. The anterior segment of the eye accounts for nearly half of all visual impairment that can lead to blindness. Therefore, there is a growing demand for ocular research and regenerative medicine that specifically targets the anterior segment to improve vision quality. This study aims to generate a microfluidic platform for investigating the formation of the anterior segment of the eye derived from human induced pluripotent stem cells (hiPSC) under various spatial-mechanoresponsive conditions. Microfluidic platforms are developed to examine the effects of dynamic conditions on the generation of hiPSCs-derived ocular organoids. The differentiation protocol is validated, and mechanoresponsive genes are identified through transcriptomic analysis. Several culture strategies is implemented for the anterior segment of eye cells in a microfluidic chip. hiPSC-derived cells showed anterior eye cell characteristics in mRNA and protein expression levels under dynamic culture conditions. The expression levels of yes-associated protein and transcriptional coactivator PDZ binding motif (YAP/TAZ) and PIEZO1, varied depending on the differentiation and growth conditions of the cells, as well as the metabolomic profiles under dynamic culture conditions.
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Affiliation(s)
- Gamze Koçak
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, 35340, Türkiye
| | - Sude Uyulgan
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, 35340, Türkiye
| | - Elifsu Polatlı
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, 35340, Türkiye
| | - Vedat Sarı
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, 35340, Türkiye
| | - Burak Kahveci
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, 35340, Türkiye
| | - Ahmet Bursali
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
| | - Leman Binokay
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, 35340, Türkiye
| | - Tuba Reçber
- Department of Analytical Chemistry, Faculty of Pharmacy, Hacettepe University, Sıhhiye, Ankara, 06100, Türkiye
| | - Emirhan Nemutlu
- Department of Analytical Chemistry, Faculty of Pharmacy, Hacettepe University, Sıhhiye, Ankara, 06100, Türkiye
| | - Adil Mardinoğlu
- Science for Life Laboratory, KTH - Royal Institute of Technology, Stockholm, Sweden
- Centre for Host-Microbiome Interactions, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, London, SE1 9RT, UK
| | - Gökhan Karakülah
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, 35340, Türkiye
| | - Canan Aslı Utine
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
- Department of Ophthalmology, Dokuz Eylül University Hospital, Dokuz Eylül University, Izmir, 35340, Türkiye
| | - Sinan Güven
- Izmir Biomedicine and Genome Center, Izmir, 35340, Türkiye
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, 35340, Türkiye
- Department of Medical Biology and Genetics, Faculty of Medicine, Dokuz Eylül University, Izmir, 35340, Türkiye
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Girgin S, Aksun M, Tüzen AS, Şencan A, Şanlı O, Kırbaş G, Güven S, Gölboyu BE, Karahan N. Effects of comorbidities associated with COVID-19 cases in Intensive Care Unit on mortality and disease progression. Eur Rev Med Pharmacol Sci 2023; 27:3753-3765. [PMID: 37140324 DOI: 10.26355/eurrev_202304_32174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
OBJECTIVE The patient's age, gender and the presence of certain concomitant diseases have been reported to play a part in the course and progression of COVID-19 in the literature. In this study, we aimed to compare the comorbidities causing mortality in critically ill Intensive Care Unit (ICU)-patients diagnosed with COVID-19. PATIENTS AND METHODS The data as regards the COVID-19 cases followed up in the ICU were retrospectively reviewed. 408 COVID-19 patients with positive PCR test were included in the study. In addition, a subgroup analysis was performed in patients treated with invasive mechanical ventilation. While the primary aim of this study was to evaluate the difference in survival rates due to comorbidities in critical COVID-19 patients, we also aimed to assess the comorbidities in severely intubated COVID-19 patients in terms of mortality. RESULTS A statistically significant increase in mortality was observed in patients with underlying hematologic malignancy and chronic renal failure (p=0.027, 0.047). Body mass index value in the mortal group was significantly higher in both the general study group and subgroup analysis (p=0.004, 0.001). CONCLUSIONS Advanced age and comorbidities such as chronic renal failure and hematologic malignancy in COVID-19 patients are associated with poor survival prognosis in critically ill COVID-19 patients.
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Affiliation(s)
- S Girgin
- Department of Anesthesiology and Reanimation, Izmir Katip Celebi University Ataturk Training and Research Hospital, Izmir, Turkey.
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Asal M, Koçak G, Sarı V, Reçber T, Nemutlu E, Utine CA, Güven S. Development of lacrimal gland organoids from iPSC derived multizonal ocular cells. Front Cell Dev Biol 2023; 10:1058846. [PMID: 36684423 PMCID: PMC9846036 DOI: 10.3389/fcell.2022.1058846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/13/2022] [Indexed: 01/05/2023] Open
Abstract
Lacrimal gland plays a vital role in maintaining the health and function of the ocular surface. Dysfunction of the gland leads to disruption of ocular surface homeostasis and can lead to severe outcomes. Approaches evolving through regenerative medicine have recently gained importance to restore the function of the gland. Using human induced pluripotent stem cells (iPSCs), we generated functional in vitro lacrimal gland organoids by adopting the multi zonal ocular differentiation approach. We differentiated human iPSCs and confirmed commitment to neuro ectodermal lineage. Then we identified emergence of mesenchymal and epithelial lacrimal gland progenitor cells by the third week of differentiation. Differentiated progenitors underwent branching morphogenesis in the following weeks, typical of lacrimal gland development. We were able to confirm the presence of lacrimal gland specific acinar, ductal, and myoepithelial cells and structures during weeks 4-7. Further on, we demonstrated the role of miR-205 in regulation of the lacrimal gland organoid development by monitoring miR-205 and FGF10 mRNA levels throughout the differentiation process. In addition, we assessed the functionality of the organoids using the β-Hexosaminidase assay, confirming the secretory function of lacrimal organoids. Finally, metabolomics analysis revealed a shift from amino acid metabolism to lipid metabolism in differentiated organoids. These functional, tear proteins secreting human lacrimal gland organoids harbor a great potential for the improvement of existing treatment options of lacrimal gland dysfunction and can serve as a platform to study human lacrimal gland development and morphogenesis.
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Affiliation(s)
- Melis Asal
- Izmir Biomedicine and Genome Center, Izmir, Turkey,Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, Turkey
| | - Gamze Koçak
- Izmir Biomedicine and Genome Center, Izmir, Turkey,Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, Turkey
| | - Vedat Sarı
- Izmir Biomedicine and Genome Center, Izmir, Turkey,Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, Turkey
| | - Tuba Reçber
- Department of Analytical Chemistry, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Emirhan Nemutlu
- Department of Analytical Chemistry, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Canan Aslı Utine
- Izmir Biomedicine and Genome Center, Izmir, Turkey,Department of Ophthalmology, Dokuz Eylül University Hospital, Dokuz Eylül University, Izmir, Turkey
| | - Sinan Güven
- Izmir Biomedicine and Genome Center, Izmir, Turkey,Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, Turkey,Department of Medical Biology and Genetics, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey,*Correspondence: Sinan Güven,
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Kasal K, Güven S, Utine CA. Current methodology and cell sources for lacrimal gland tissue engineering. Exp Eye Res 2022; 221:109138. [DOI: 10.1016/j.exer.2022.109138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 05/14/2022] [Accepted: 05/30/2022] [Indexed: 11/25/2022]
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Karagöz M, Güven S, Tefik T, Gökçe M, Kiremit M, İbiş A, Yitgin Y, Böyük E, Verep S, Sarica K. Why do urologists avoid metabolic evaluation for stone recurrence? EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)00175-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Ecer G, Sönmez M, Aydın A, Topçu C, Alalam H, Güven S, Balasar M. Comparison of retrograde intrarenal stone surgery with and without a ureteral access sheath using Kidney Injury Molecule-1 (KIM-1) levels: A prospective randomized study. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)00154-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Abstract
There is a rapidly growing interest in generation of 3D organotypic microtissues with human physiologically relevant structure, function, and cell population in a wide range of applications including drug screening, in vitro physiological/pathological models, and regenerative medicine. Here, we provide a detailed procedure to generate structurally defined 3D organotypic microtissues from cells or cell spheroids using acoustic waves as a biocompatible and scaffold-free tissue engineering tool.
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Affiliation(s)
- Yuqing Zhu
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
- Institute of Model Animals of Wuhan University, Wuhan, 430071, China
| | - Vahid Serpooshan
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Sean Wu
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Utkan Demirci
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Department of Radiology, Canary Center for Early Cancer Detection, Stanford University School of Medicine, Stanford, CA, USA
| | - Pu Chen
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China.
- Institute of Model Animals of Wuhan University, Wuhan, 430071, China.
| | - Sinan Güven
- Izmir International Biomedicine and Genome Institute, Dokuz Eylul University, Izmir, Turkey.
- Department of Medical Biology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey.
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Saxer F, Scherberich A, Todorov A, Studer P, Miot S, Schreiner S, Güven S, Tchang LAH, Haug M, Heberer M, Schaefer DJ, Rikli D, Martin I, Jakob M. Implantation of Stromal Vascular Fraction Progenitors at Bone Fracture Sites: From a Rat Model to a First-in-Man Study. Stem Cells 2016; 34:2956-2966. [PMID: 27538760 DOI: 10.1002/stem.2478] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 06/24/2016] [Accepted: 07/13/2016] [Indexed: 12/29/2022]
Abstract
Stromal Vascular Fraction (SVF) cells freshly isolated from adipose tissue include osteogenic- and vascular-progenitors, yet their relevance in bone fracture healing is currently unknown. Here, we investigated whether human SVF cells directly contribute to the repair of experimental fractures in nude rats, and explored the feasibility/safety of their clinical use for augmentation of upper arm fractures in elderly individuals. Human SVF cells were loaded onto ceramic granules within fibrin gel and implanted in critical nude rat femoral fractures after locking-plate osteosynthesis, with cell-free grafts as control. After 8 weeks, only SVF-treated fractures did not fail mechanically and displayed formation of ossicles at the repair site, with vascular and bone structures formed by human cells. The same materials combined with autologous SVF cells were then used to treat low-energy proximal humeral fractures in 8 patients (64-84 years old) along with standard open reduction and internal fixation. Graft manufacturing and implantation were compatible with intraoperative settings and led to no adverse reactions, thereby verifying feasibility/safety. Biopsies of the repair tissue after up to 12 months, upon plate revision or removal, demonstrated formation of bone ossicles, structurally disconnected and morphologically distinct from osteoconducted bone, suggesting the osteogenic nature of implanted SVF cells. We demonstrate that SVF cells, without expansion or exogenous priming, can spontaneously form bone tissue and vessel structures within a fracture-microenvironment. The gained clinical insights into the biological functionality of the grafts, combined with their facile, intra-operative manufacturing modality, warrant further tests of effectiveness in larger, controlled trials. Stem Cells 2016;34:2956-2966.
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Affiliation(s)
- Franziska Saxer
- Clinic of Traumatology, University Hospital Basel, University of Basel, Basel, Switzerland.,Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Arnaud Scherberich
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Atanas Todorov
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Patrick Studer
- Clinic of Traumatology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Sylvie Miot
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Simone Schreiner
- Clinic of Traumatology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Sinan Güven
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Laurent A H Tchang
- Clinic of Plastic, Reconstructive and Aesthetic Surgery, University Hospital Basel, Basel, Switzerland
| | - Martin Haug
- Clinic of Plastic, Reconstructive and Aesthetic Surgery, University Hospital Basel, Basel, Switzerland
| | - Michael Heberer
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Dirk J Schaefer
- Clinic of Plastic, Reconstructive and Aesthetic Surgery, University Hospital Basel, Basel, Switzerland
| | - Daniel Rikli
- Clinic of Traumatology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Ivan Martin
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Marcel Jakob
- Clinic of Traumatology, University Hospital Basel, University of Basel, Basel, Switzerland
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Namkoong B, Güven S, Ramesan S, Liaudanskaya V, Abzhanov A, Demirci U. Recapitulating cranial osteogenesis with neural crest cells in 3-D microenvironments. Acta Biomater 2016; 31:301-311. [PMID: 26675129 DOI: 10.1016/j.actbio.2015.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 11/11/2015] [Accepted: 12/02/2015] [Indexed: 01/20/2023]
Abstract
The experimental systems that recapitulate the complexity of native tissues and enable precise control over the microenvironment are becoming essential for the pre-clinical tests of therapeutics and tissue engineering. Here, we described a strategy to develop an in vitro platform to study the developmental biology of craniofacial osteogenesis. In this study, we directly osteo-differentiated cranial neural crest cells (CNCCs) in a 3-D in vitro bioengineered microenvironment. Cells were encapsulated in the gelatin-based photo-crosslinkable hydrogel and cultured up to three weeks. We demonstrated that this platform allows efficient differentiation of p75 positive CNCCs to cells expressing osteogenic markers corresponding to the sequential developmental phases of intramembranous ossification. During the course of culture, we observed a decrease in the expression of early osteogenic marker Runx2, while the other mature osteoblast and osteocyte markers such as Osterix, Osteocalcin, Osteopontin and Bone sialoprotein increased. We analyzed the ossification of the secreted matrix with alkaline phosphatase and quantified the newly secreted hydroxyapatite. The Field Emission Scanning Electron Microscope (FESEM) images of the bioengineered hydrogel constructs revealed the native-like osteocytes, mature osteoblasts, and cranial bone tissue morphologies with canaliculus-like intercellular connections. This platform provides a broadly applicable model system to potentially study diseases involving primarily embryonic craniofacial bone disorders, where direct diagnosis and adequate animal disease models are limited.
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Affiliation(s)
- Bumjin Namkoong
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA; Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA
| | - Sinan Güven
- Demirci BAMM Labs, Canary Center at Stanford for Early Cancer Detection, Department of Radiology, Department of Electrical Engineering (By courtesy), Stanford School of Medicine, Palo Alto, CA 94304, USA; Izmir Biomedicine and Genome Center, Dokuz Eylul University Health Campus, Balcova, 35350 Izmir, Turkey
| | - Shwathy Ramesan
- Demirci BAMM Labs, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Volha Liaudanskaya
- Demirci BAMM Labs, Canary Center at Stanford for Early Cancer Detection, Department of Radiology, Department of Electrical Engineering (By courtesy), Stanford School of Medicine, Palo Alto, CA 94304, USA
| | - Arhat Abzhanov
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA; Current address: Department of Life Sciences, Imperial College London, Silwood Park Campus Buckhurst Road, Ascot, Berkshire SL5 7PY, United Kingdom; Current address: Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom.
| | - Utkan Demirci
- Demirci BAMM Labs, Canary Center at Stanford for Early Cancer Detection, Department of Radiology, Department of Electrical Engineering (By courtesy), Stanford School of Medicine, Palo Alto, CA 94304, USA; Demirci BAMM Labs, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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10
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Bouyer C, Chen P, Güven S, Demirtaş TT, Nieland TJF, Padilla F, Demirci U. A Bio-Acoustic Levitational (BAL) Assembly Method for Engineering of Multilayered, 3D Brain-Like Constructs, Using Human Embryonic Stem Cell Derived Neuro-Progenitors. Adv Mater 2016; 28:161-7. [PMID: 26554659 DOI: 10.1002/adma.201503916] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 09/14/2015] [Indexed: 05/27/2023]
Abstract
A bio-acoustic levitational assembly method for engineering of multilayered, 3D brainlike constructs is presented. Acoustic radiation forces are used to levitate neuroprogenitors derived from human embryonic stem cells in 3D multilayered fibrin tissue constructs. The neuro-progenitor cells are subsequently differentiated in neural cells, resulting in a 3D neuronal construct with inter and intralayer neurite elongations.
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Affiliation(s)
- Charlène Bouyer
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center for Early Cancer Detection, Department of Radiology, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
- Inserm, U1032, LabTau, University of Lyon, Lyon, F-69003, France
- LabEx DEVweCAN, University of Lyon, Lyon, F-69003, France
| | - Pu Chen
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center for Early Cancer Detection, Department of Radiology, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
| | - Sinan Güven
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center for Early Cancer Detection, Department of Radiology, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
| | - Tuğrul Tolga Demirtaş
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center for Early Cancer Detection, Department of Radiology, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
| | - Thomas J F Nieland
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center for Early Cancer Detection, Department of Radiology, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
| | - Frédéric Padilla
- Inserm, U1032, LabTau, University of Lyon, Lyon, F-69003, France
- LabEx DEVweCAN, University of Lyon, Lyon, F-69003, France
| | - Utkan Demirci
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center for Early Cancer Detection, Department of Radiology, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
- Department of Electrical Engineering (By Courtesy), Stanford University, Stanford, CA, 94305, USA
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Klar AS, Güven S, Zimoch J, Zapiórkowska NA, Biedermann T, Böttcher-Haberzeth S, Meuli-Simmen C, Martin I, Scherberich A, Reichmann E, Meuli M. Characterization of vasculogenic potential of human adipose-derived endothelial cells in a three-dimensional vascularized skin substitute. Pediatr Surg Int 2016; 32:17-27. [PMID: 26621500 DOI: 10.1007/s00383-015-3808-7] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/09/2015] [Indexed: 12/24/2022]
Abstract
PURPOSE The need for clinically applicable skin substitutes continues to be a matter of fact. Hypothetically, a laboratory grown autologous skin analog with near normal architecture might be a suitable approach to yield both satisfactory functional and cosmetic long-term results. In this study, we explored the use of human endothelial cells derived from freshly isolated adipose stromal vascular fraction (SVF) in a three-dimensional (3D) co-culture model of vascularized bio-engineered skin substitute. METHODS The SVF was isolated from human white adipose tissue samples and keratinocytes from human skin biopsies. The SVF, in particular endothelial cells, were characterized using flow cytometry and immuofluorescence analysis. Endothelial and mesenchymal progenitors from the SVF formed blood capillaries after seeding into a 3D collagen type I hydrogel in vitro. Subsequently, human keratinocytes were seeded on the top of those hydrogels to develop a vascularized dermo-epidermal skin substitute. RESULTS Flow cytometric analysis of surface markers of the freshly isolated SVF showed the expression of endothelial markers (CD31, CD34, CD146), mesenchymal/stromal cell-associated markers (CD44, CD73, CD90, CD105), stem cell markers (CD49f, CD117, CD133), and additionally hematopoietic markers (CD14, CD15, CD45). Further analysis of white adipose-derived endothelial cells (watECs) revealed the co-expression of CD31, CD34, CD90, CD105, and partially CD146 on these cells. WatECs were separated from adipose-stromal cells (watASCs) using FACS sorting. WatASCs and watECs cultured separately in a 3D hydrogel for 3 weeks did not form any vascular structures. Only if co-cultured, both cell types aligned to develop a ramified vascular network in vitro with continuous endothelial lumen formation. Transplantation of those 3D-hydrogels onto immuno-incompetent rats resulted in a rapid connection of human capillaries with the host vessels and formation of functional, blood-perfused mosaic human-rat vessels within only 3-4 days. CONCLUSIONS Adipose tissue represents an attractive cell source due to the ease of isolation and abundance of endothelial as well as mesenchymal cell lineages. Adipose-derived SVF cells exhibit the ability to form microvascular structures in vitro and support the accelerated blood perfusion in skin substitutes in vivo when transplanted.
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Affiliation(s)
- Agnes S Klar
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Sinan Güven
- Department of Biomedicine, University Hospital of Basel, University of Basel, Basel, Switzerland
| | - Jakub Zimoch
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Natalia A Zapiórkowska
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Thomas Biedermann
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Sophie Böttcher-Haberzeth
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
- Department of Surgery, University Children's Hospital Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland
| | - Claudia Meuli-Simmen
- Department of Plastic, Reconstructive, Esthetical and Hand Surgery, Kantonsspital Aarau, Aarau, Switzerland
| | - Ivan Martin
- Department of Biomedicine, University Hospital of Basel, University of Basel, Basel, Switzerland
| | - Arnaud Scherberich
- Department of Biomedicine, University Hospital of Basel, University of Basel, Basel, Switzerland
| | - Ernst Reichmann
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Martin Meuli
- Department of Surgery, University Children's Hospital Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland.
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12
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Abstract
Bioengineering of 3D microtissues from cell spheroids is demonstrated by employing the vibration of acoustic standing waves and its hydrodynamic effect at the bottom of a liquid-carrier chamber. A large number of cell spheroids (>10(4) ) are assembled in seconds into a closely packed structure in a scaffold-free fashion under nodal pattern of the standing waves in a fluidic environment.
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Affiliation(s)
- Pu Chen
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center at Stanford for Early Cancer Detection, Department of Radiology, School of Medicine, Stanford University, Palo Alto, CA 94304
| | - Sinan Güven
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center at Stanford for Early Cancer Detection, Department of Radiology, School of Medicine, Stanford University, Palo Alto, CA 94304
| | - Osman Berk Usta
- Center for Engineering in Medicine at Massachusetts General Hospital, Harvard Medical School and Shriners Hospital for Children, 51 Blossom St., Boston, MA, 02114
| | - Martin L Yarmush
- Center for Engineering in Medicine at Massachusetts General Hospital, Harvard Medical School and Shriners Hospital for Children, 51 Blossom St., Boston, MA, 02114
- Department of Biomedical Engineering, Rutgers University, 599 Taylor Rd., Piscataway, NJ 08854
| | - Utkan Demirci
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Canary Center at Stanford for Early Cancer Detection, Department of Radiology, School of Medicine, Stanford University, Palo Alto, CA 94304
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Chen P, Luo Z, Güven S, Tasoglu S, Ganesan AV, Weng A, Demirci U. Microscale assembly directed by liquid-based template. Adv Mater 2014; 26:5936-41. [PMID: 24956442 PMCID: PMC4159433 DOI: 10.1002/adma.201402079] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 05/22/2014] [Indexed: 05/18/2023]
Abstract
A liquid surface established by standing waves is used as a dynamically reconfigurable template to assemble microscale materials into ordered, symmetric structures in a scalable and parallel manner. The broad applicability of this technology is illustrated by assembling diverse materials from soft matter, rigid bodies, individual cells, cell spheroids and cell-seeded microcarrier beads.
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Affiliation(s)
- Pu Chen
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Department of Radiology, Canary Center for Early Cancer Detection, Stanford University School of Medicine, Stanford University, Palo Alto, CA 94304
| | - Zhengyuan Luo
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Department of Medicine, Division of Biomedical Engineering, Brigham & Women’s Hospital, Harvard Medical School, MA,02139, USA
| | - Sinan Güven
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Department of Radiology, Canary Center for Early Cancer Detection, Stanford University School of Medicine, Stanford University, Palo Alto, CA 94304
| | - Savas Tasoglu
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Department of Radiology, Canary Center for Early Cancer Detection, Stanford University School of Medicine, Stanford University, Palo Alto, CA 94304
| | - Adarsh Venkataraman Ganesan
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Department of Medicine, Division of Biomedical Engineering, Brigham & Women’s Hospital, Harvard Medical School, MA,02139, USA
| | - Andrew Weng
- Bio-Acoustic MEMS in Medicine (BAMM) Lab, Department of Medicine, Division of Biomedical Engineering, Brigham & Women’s Hospital, Harvard Medical School, MA,02139, USA
| | - Utkan Demirci
- Correspondence and requests for materials should be addressed to U.D.
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Kuyumcu M, Halil M, Kara Ö, Yesil Y, Arik G, Cağlayan G, Çuni B, Güven S, Yavuz B, Cankurtaran M, Özçakar L. PP055-SUN: Ultrasonographic Evaluation of Muscle Architecture in Older Adults with Sarcopenia. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50097-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Klar AS, Güven S, Biedermann T, Luginbühl J, Böttcher-Haberzeth S, Meuli-Simmen C, Meuli M, Martin I, Scherberich A, Reichmann E. Tissue-engineered dermo-epidermal skin grafts prevascularized with adipose-derived cells. Biomaterials 2014; 35:5065-78. [DOI: 10.1016/j.biomaterials.2014.02.049] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 02/23/2014] [Indexed: 01/04/2023]
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16
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Abakay A, Atilgan S, Abakay O, Atalay Y, Güven S, Yaman F, Palanci Y, Tekbas G, Dalli A, Tanrikulu AC. Frequency of respiratory function disorders among dental laboratory technicians working under conditions of high dust concentration. Eur Rev Med Pharmacol Sci 2013; 17:809-814. [PMID: 23609365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND AND OBJECTIVES Dental laboratory technicians (DLTs) have much exposure to mineralogical dust that may have adverse effects on their lung health. The aim of our study was to investigate occupational dust exposure, and to determine the frequency of respiratory function disorders and radiologic abnormalities among DLTs. MATERIALS AND METHODS The study enrolled 94 DLTs who were exposed to dust in dental laboratories and 94 control subjects. Dust concentrations in the workplaces were measured. RESULTS The mean age of DLTs was 30.70 ± 9.84 years. No significant difference was found between the DLTs and the control groups for age or smoking status (p > 0.05). Spirometric values for the DLTs were found to be lower than the control group (p < 0.05). The mean working period for DLTs was 9.19±5.9 years. The pulmonary function test results for the DLTs showed that 65.9% had a normal pattern, 22.4% were restrictive, and 11.7% showed obstructive type pulmonary function disorder. Negative correlations were found between the working period time and Forced Expiratory Volume in 1 second in the DLTs (R = -0.675 p = 0.000). Negative correlations were also found between working period time and Forced Vital Capacity in the DLTs (R = -0.720 p = 0.000). All DLTs had chest X-rays and 16 (17%) of them showed radiological pneumoconiosis. CONCLUSIONS This study showed a negative association between level of respiratory function and working period in DLTs.
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Affiliation(s)
- A Abakay
- Department of Chest Diseases, School of Medicine, Dicle University, Diyarbakir, Turkey.
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17
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Osmanağaoğlu MA, Karahan SC, Aran T, Güven S, Cora A, Kopuz M, Bozkaya H. The effects of hormone therapy on ischemia modified albumin and soluble CD40 ligand levels in obese surgical menopausal women. CLIN EXP OBSTET GYN 2013; 40:389-392. [PMID: 24283172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
PURPOSE To determine the effects of hormone therapy (HT) on ischemia modified albumin (IMA) and soluble (s)CD40 ligand in obese surgical menopausal women. MATERIALS AND METHODS A total of 52 obese surgical menopausal women with a body mass index (BMI) > 30 kg/m2 were admitted to the study. Twenty-seven women received estradiol hemihydrate two mg and 25 did not receive any menopausal therapy. At baseline and after three and six months of treatment, IMA and sCD40 ligand levels were measured. RESULTS There were no significant differences among the groups for any variables at baseline. No difference in change in the serum sCD40L levels was found in obese surgical menopausal women after three and six months of HT. Serum IMA levels were statistically lowered in obese women with HT after six months of treatment. CONCLUSION HT may have a beneficial reduction in IMA levels in obese surgical menopausal women.
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Affiliation(s)
- M A Osmanağaoğlu
- Karadeniz Technical University, Faculty of Medicine, Department of Obstetrics and Gynecology, Trabzon, Turkey.
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Abstract
A total of 57 pregnant women, who were admitted to the outpatient clinic having high visual analogue scale (VAS) and a history of chronic pelvic pain before pregnancy, were evaluated with the international pelvic pain assessment form (IPPAF). Gynaecological disorders, pain at ovulation, dysmenorrhoea, level of cramps with period and suspicion of endometriosis were determined to be higher in the pre-term group (p < 0.05). Regarding urological disorders, pain when the bladder was full, pain with urination, a positive answer to the question, 'Does your urgency bother you?' and suspicion of interstitial cystitis were also determined to be higher in the pre-term group (p < 0.05). Thus, the total IPPAF scores were significantly higher in the pre-term group (p < 0.05). The pregnant women with a higher total IPPAF score before pregnancy may thus have a higher probability of pre-term labour.
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Affiliation(s)
- C Bayram
- Department of Obstetrics and Gynecology, School of Medicine, Karadeniz Technical University, Trabzon, Turkey
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19
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Mehrkens A, Saxer F, Güven S, Hoffmann W, Müller AM, Jakob M, Weber FE, Martin I, Scherberich A, Scherberich A. Intraoperative engineering of osteogenic grafts combining freshly harvested, human adipose-derived cells and physiological doses of bone morphogenetic protein-2. Eur Cell Mater 2012; 24:308-19. [PMID: 23018419 DOI: 10.22203/ecm.v024a22] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Engineered osteogenic constructs for bone repair typically involve complex and costly processes for cell expansion. Adipose tissue includes mesenchymal precursors in large amounts, in principle allowing for an intraoperative production of osteogenic grafts and their immediate implantation. However, stromal vascular fraction (SVF) cells from adipose tissue were reported to require a molecular trigger to differentiate into functional osteoblasts. The present study tested whether physiological doses of recombinant human BMP-2 (rhBMP-2) could induce freshly harvested human SVF cells to generate ectopic bone tissue. Enzymatically dissociated SVF cells from 7 healthy donors (1 x 10(6) or 4 x 10(6)) were immediately embedded in a fibrin gel with or without 250 ng rhBMP-2, mixed with porous silicated calcium-phosphate granules (Actifuse(®), Apatech) (final construct size: 0.1 cm(3)) and implanted ectopically for eight weeks in nude mice. In the presence of rhBMP-2, SVF cells not only supported but directly contributed to the formation of bone ossicles, which were not observed in control cell-free, rhBMP-2 loaded implants. In vitro analysis indicated that rhBMP-2 did not involve an increase in the percentage of SVF cells recruited to the osteogenic lineage, but rather induced a stimulation of the osteoblastic differentiation of the committed progenitors. These findings confirm the feasibility of generating fully osteogenic grafts using an easily accessible autologous cell source and low amounts of rhBMP-2, in a timing compatible with an intraoperative schedule. The study warrants further investigation at an orthotopic site of implantation, where the delivery of rhBMP-2 could be bypassed thanks to the properties of the local milieu.
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Affiliation(s)
- Arne Mehrkens
- Department of Surgery, University and University Hospital of Basel, 4031 Basel, Switzerland
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20
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Güven S, Karagianni M, Schwalbe M, Schreiner S, Farhadi J, Bula S, Bieback K, Martin I, Scherberich A. Validation of an automated procedure to isolate human adipose tissue-derived cells by using the Sepax® technology. Tissue Eng Part C Methods 2012; 18:575-82. [PMID: 22372873 DOI: 10.1089/ten.tec.2011.0617] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The stromal vascular fraction of adipose tissue has gained popularity as a source of autologous progenitor cells for tissue engineering and regenerative medicine applications. The aim of this study was to validate a newly developed, automated procedure to isolate adipose-derived mesenchymal stem/stromal cells (ASCs) from adult human lipoaspirates in a closed and clinical-grade device, based on the Sepax(®) technology. Using a total of 11 donors, this procedure was compared with the standard operator-based manual separation in terms of isolation yield, clonogenic fraction, phenotype, and differentiation potential of ASCs. As compared with the manual process, automation resulted in a 62% higher isolation yield, with 2.6±1.2×10(5) nucleated cells per mL of liposuction, and a 24% higher frequency of clonogenic progenitors. The variability in the isolation yield and clonogenicity across different preparations was reduced by 18% and 50%, respectively. The cytofluorimetric profile and in vitro differentiation capacity into mesenchymal lineages were comparable in the cells isolated using the two procedures. The new Sepax-based process thus allows an efficient isolation of ASCs with higher and more reproducible yields than the standard manual procedure, along with minimal operator intervention. These results are expected to facilitate the use of ASCs for clinical purposes, either within an intraoperative setting or in combination with further in vitro cell expansion/cultivation.
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Affiliation(s)
- Sinan Güven
- Department of Surgery, University Hospital Basel, Basel, Switzerland
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21
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Osmanağaoğlu M, Caner Karahan S, Aran T, Güven S, Kart C, Pekgöz İ, Menteşe A, Bozkaya H. Predictive Value of Plasma Total Carnitine, Arginine, Asymmetric Dimethylarginine and Ischemia-modified Albumin Levels and Their Combined Use in the Early Detection of Preeclampsia. Geburtshilfe Frauenheilkd 2011. [DOI: 10.1055/s-0031-1280229] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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22
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Güven S, Mehrkens A, Saxer F, Schaefer DJ, Martinetti R, Martin I, Scherberich A. Engineering of large osteogenic grafts with rapid engraftment capacity using mesenchymal and endothelial progenitors from human adipose tissue. Biomaterials 2011; 32:5801-9. [PMID: 21605897 DOI: 10.1016/j.biomaterials.2011.04.064] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Accepted: 04/23/2011] [Indexed: 12/13/2022]
Abstract
We investigated whether the maintenance in culture of endothelial and mesenchymal progenitors from the stromal vascular fraction (SVF) of human adipose tissue supports the formation of vascular structures in vitro and thereby improves the efficiency and uniformity of bone tissue formation in vivo within critically sized scaffolds. Freshly-isolated human SVF cells were seeded and cultured into hydroxyapatite scaffolds (1 cm-diameter, 1 cm-thickness) using a perfusion-based bioreactor system, which resulted in maintenance of CD34(+)/CD31(+) endothelial lineage cells. Monolayer-expanded isogenic adipose stromal cells (ASC) and age-matched bone marrow stromal cells (BMSC), both lacking vasculogenic cells, were used as controls. After 5 days in vitro, SVF-derived endothelial and mesenchymal progenitors formed capillary networks, which anastomosed with the host vasculature already 1 week after ectopic nude rat implantation. As compared to BMSC and ASC, SVF-derived cells promoted faster tissue ingrowth, more abundant and uniform bone tissue formation, with ossicles reaching a 3.5 mm depth from the scaffold periphery after 8 weeks. Our findings demonstrate that maintenance of endothelial/mesenchymal SVF cell fractions is crucial to generate osteogenic constructs with enhanced engraftment capacity. The single, easily accessible cell source and streamlined, bioreactor-based process makes the approach attractive towards manufacturing of clinically relevant sized bone substitute grafts.
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Affiliation(s)
- Sinan Güven
- Department of Surgery, University Hospital Basel, Basel, Switzerland
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23
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Papadimitropoulos A, Scherberich A, Güven S, Theilgaard N, Crooijmans HJA, Santini F, Scheffler K, Zallone A, Martin I. A 3D in vitro bone organ model using human progenitor cells. Eur Cell Mater 2011; 21:445-58; discussion 458. [PMID: 21604244 DOI: 10.22203/ecm.v021a33] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Three-dimensional (3D) organotypic culture models based on human cells may reduce the use of complex and costly animal models, while gaining clinical relevance. This study aimed at developing a 3D osteoblastic-osteoclastic-endothelial cell co-culture system, as an in vitro model to mimic the process of bone turnover. Osteoprogenitor and endothelial lineage cells were isolated from the stromal vascular fraction (SVF) of human adipose tissue, whereas CD14+ osteoclast progenitors were derived from human peripheral blood. Cells were co-cultured within 3D porous ceramic scaffolds using a perfusion-based bioreactor device, in the presence of typical osteoclastogenic factors. After 3 weeks, the scaffolds contained cells with endothelial (2.0±0.3%), pre/osteoclastic (14.0±1.4%) and mesenchymal/osteoblastic (44.0±8.4%) phenotypes, along with tartrate-resistant acid phosphatase-positive (TRAP+) osteoclastic cells in contact with deposited bone-like matrix. Supernatant analysis demonstrated sustained matrix deposition (by C-terminus procollagen-I propeptides), resorption (by N-terminus collagen-I telopeptides and phosphate levels) and osteoclastic activity (by TRAP-5b) only when SVF and CD14+ cells were co-cultured. Scanning electron microscopy and magnetic resonance imaging confirmed the pattern of matrix deposition and resorption. The effectiveness of Vitamin D in replacing osteoclastogenic factors indicated a functional osteoblast-osteoclast coupling in the system. The formation of human-origin bone-like tissue, blood vessels and osteoclasts upon ectopic implantation validated the functionality of the developed cell types. The 3D co-culture system and the associated non-invasive analytical tools can be used as an advanced model to capture some aspects of the functional coupling of bone-like matrix deposition and resorption and could be exploited toward the engineering of multi-functional bone substitute implants.
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Affiliation(s)
- Adam Papadimitropoulos
- Department of Surgery, University Hospital Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland
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Kossowska-Tomaszczuk K, Pelczar P, Güven S, Kowalski J, Volpi E, De Geyter C, Scherberich A. A Novel Three-Dimensional Culture System Allows Prolonged Culture of Functional Human Granulosa Cells and Mimics the Ovarian Environment. Tissue Eng Part A 2010; 16:2063-73. [DOI: 10.1089/ten.tea.2009.0684] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Katarzyna Kossowska-Tomaszczuk
- Woman's Hospital, University Hospital of Basel, Basel, Switzerland
- Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
| | - Pawel Pelczar
- Institute of Laboratory Animals, University Hospital of Zurich, Zurich, Switzerland
| | - Sinan Güven
- Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
| | | | - Emanuela Volpi
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Christian De Geyter
- Woman's Hospital, University Hospital of Basel, Basel, Switzerland
- Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
| | - Arnaud Scherberich
- Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
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Müller AM, Mehrkens A, Schäfer DJ, Jaquiery C, Güven S, Lehmicke M, Martinetti R, Farhadi I, Jakob M, Scherberich A, Martin I. Towards an intraoperative engineering of osteogenic and vasculogenic grafts from the stromal vascular fraction of human adipose tissue. Eur Cell Mater 2010; 19:127-35. [PMID: 20198567 DOI: 10.22203/ecm.v019a13] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Grafts generated by cultivation of progenitor cells from the stromal vascular fraction of human adipose tissue have been proven to have osteogenic and vasculogenic properties in vivo. However, in vitro manufacture of such implants is challenged by complex, impractical and expensive processes, and requires implantation in a separate surgery. This study investigates the feasibility of an intraoperative approach to engineer cell-based bone grafts with tissue harvest, cell isolation, cell seeding onto a scaffold and subsequent implantation within a few hours. Freshly isolated adipose tissue cells from a total of 11 donors, containing variable fractions of mesenchymal and endothelial progenitors, were embedded at different densities in a fibrin hydrogel, which was wrapped around bone substitute materials based on beta-tricalcium phosphate (ChronOS), hydroxyapatite (Engipore), or acellular xenograft (Bio-Oss). The resulting constructs, generated within 3 hours from biopsy harvest, were immediately implanted ectopically in nude mice and analysed after eight weeks. All explants contained blood vessels formed by human endothelial cells, functionally connected to the recipient's vasculature. Human origin cells were also found within osteoid structures, positively immunostained for bone sialoprotein and osteocalcin. However, even with the highest loaded cell densities, no frank bone tissue was detected, independently of the material used. These results provide a proof-of-principle that an intraoperative engineering of autologous cell-based vasculogenic bone substitutes is feasible, but highlight that - in the absence of in vitro commitment--additional cues (e.g., low dose of osteogenic factors or orthotopic environmental conditions) are likely needed to support complete osteoblastic cell differentiation and bone tissue generation.
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Affiliation(s)
- A M Müller
- 1Departments of Surgery and of Biomedicine, University Hospital Basel, CH-4031 Basel, Switzerland.
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Acar H, Kilinç M, Yurdakul T, Güven S. Lack of significant association between chromosome Y microdeletion and varicocele in Turkish patients. Genet Couns 2006; 17:69-71. [PMID: 16719280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
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27
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Pasaoglu H, Güven S, Büyükgüngör O. Spectroscopic and structural investigation of ZnI2(nicotinamide)2, [Zn(H2O)2(picolinamide)2]I2and Zn I2(isonicotinamide)2. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305087179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Affiliation(s)
- S Güven
- Department of Pediatrics, Beykoz State Hospital, Istanbul, Turkey
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Gülay H, Güven S, Arslan G, Hamaloğlu E, Ekici E, Bilgin N, Haberal M. Living related donor kidney transplantation in 349 consecutive recipients. Transplant Proc 1991; 23:2572-3. [PMID: 1926486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- H Gülay
- Turkish Transplantation and Burn Foundation Hospital, Ankara
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30
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Haberal M, Gülay H, Koç M, Güven S, Karamehmetoğlu M, Hamaloğlu E. Kidney transplantation from aged donors. Transplant Proc 1991; 23:2624-5. [PMID: 1926509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- M Haberal
- Turkish Transplantation and Burn Foundation Hospital, Ankara
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31
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Roberts RS, Worrall EE, Güven S. Primary and secondary immune responses of sheep to tetanus toxoid. J Comp Pathol 1971; 81:249-53. [PMID: 5091666 DOI: 10.1016/0021-9975(71)90099-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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