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Guimaraes APP, Calori IR, Stilhano RS, Tedesco AC. Renal proximal tubule-on-a-chip in PDMS: fabrication, functionalization, and RPTEC:HUVEC co-culture evaluation. Biofabrication 2024; 16:025024. [PMID: 38408383 DOI: 10.1088/1758-5090/ad2d2f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 02/26/2024] [Indexed: 02/28/2024]
Abstract
'On-a-chip' technology advances the development of physiologically relevant organ-mimicking architecture by integrating human cells into three-dimensional microfluidic devices. This method also establishes discrete functional units, faciliting focused research on specific organ components. In this study, we detail the development and assessment of a convoluted renal proximal tubule-on-a-chip (PT-on-a-chip). This platform involves co-culturing Renal Proximal Tubule Epithelial Cells (RPTEC) and Human Umbilical Vein Endothelial Cells (HUVEC) within a polydimethylsiloxane microfluidic device, crafted through a combination of 3D printing and molding techniques. Our PT-on-a-chip significantly reduced high glucose level, exhibited albumin uptake, and simulated tubulopathy induced by amphotericin B. Remarkably, the RPTEC:HUVEC co-culture exhibited efficient cell adhesion within 30 min on microchannels functionalized with plasma, 3-aminopropyltriethoxysilane, and type-I collagen. This approach significantly reduced the required incubation time for medium perfusion. In comparison, alternative methods such as plasma and plasma plus polyvinyl alcohol were only effective in promoting cell attachment to flat surfaces. The PT-on-a-chip holds great promise as a valuable tool for assessing the nephrotoxic potential of new drug candidates, enhancing our understanding of drug interactions with co-cultured renal cells, and reducing the need for animal experimentation, promoting the safe and ethical development of new pharmaceuticals.
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Affiliation(s)
- Ana Paula Pereira Guimaraes
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering- Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, São Paulo, Ribeirão Preto 14040-901, Brazil
| | - Italo Rodrigo Calori
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering- Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, São Paulo, Ribeirão Preto 14040-901, Brazil
- Pharmaceutical Engineering and 3D Printing (PharmE3D) Labs, Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, Oxford, MS 38677, United States of America
| | - Roberta Sessa Stilhano
- Department of Physiological Sciences, Santa Casa de Sao Paulo School of Medical Sciences, Sao Paulo, Brazil
| | - Antonio Claudio Tedesco
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering- Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, São Paulo, Ribeirão Preto 14040-901, Brazil
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Bishal AK, Sukotjo C, Jokisaari JR, Klie RF, Takoudis CG. Enhanced Bioactivity of Collagen Fiber Functionalized with Room Temperature Atomic Layer Deposited Titania. ACS APPLIED MATERIALS & INTERFACES 2018; 10:34443-34454. [PMID: 30212175 DOI: 10.1021/acsami.8b05857] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Surface modifications of a biomaterial like collagen are crucial in improving the surface properties and thus enhancing the functionality and performance of such a material for a variety of biomedical applications. In this study, a commercially available collagen membrane's surface was functionalized by depositing an ultrathin film of titania or titanium dioxide (TiO2) using a room temperature atomic layer deposition (ALD) process. A novel titanium precursor-oxidizer combination was used for this process in a custom-made ALD reactor. Surface characterizations revealed successful deposition of uniform, conformal TiO2 thin film on the collagen fibrillar surface, and consequently, the fibers became thicker making the membrane pores smaller. The in vitro bioactivity of the ALD-TiO2 thin film coated collagen was investigated for the first time using cell proliferation and a calcium phosphate mineralization assay. The TiO2-coated collagen demonstrated improved biocompatibility promoting higher growth and proliferation of human osteoblastic and mesenchymal stem cells when compared to that of noncoated collagen. A higher level of calcium phosphate or apatite formation was observed on ALD modified collagen surface as compared to that on noncoated collagen. Therefore, this novel material can be promising in bone tissue engineering applications.
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Affiliation(s)
- Arghya K Bishal
- Department of Bioengineering , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
| | - Cortino Sukotjo
- Department of Bioengineering , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
- Restorative Dentistry, College of Dentistry , University of Illinois at Chicago , Chicago , Illinois 60612 , United States
| | - Jacob R Jokisaari
- Department of Physics , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
| | - Robert F Klie
- Department of Physics , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
| | - Christos G Takoudis
- Department of Bioengineering , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
- Department of Chemical Engineering , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
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Liu Y, Andarawis-Puri N, Eppell SJ. Method to extract minimally damaged collagen fibrils from tendon. J Biol Methods 2016; 3:e54. [PMID: 31453217 PMCID: PMC6706113 DOI: 10.14440/jbm.2016.121] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 08/01/2016] [Accepted: 08/31/2016] [Indexed: 11/23/2022] Open
Abstract
A new method is presented to extract collagen fibrils from mammalian tendon tissue. Mammalian tendons are treated with a trypsin-based extraction medium and gently separated with tweezers in an aqueous solution. Collagen fibrils released in the solution are imaged using both dark-field light microscopy and scanning electron microscopy. The method successfully extracts isolated fibrils from rat tail and patellar tendons. To examine whether the method is likely to damage fibrils during extraction, sea cucumber dermis fibril lengths are compared against those obtained using only distilled water. The two methods produce fibrils of similar lengths. This is contrasted with fibrils being shortened when extracted using a tissue homogenizer. Scanning electron microscopy shows the new method preserves D-banding features on fibril surfaces and that fibril diameter does not vary substantially compared with water extracted fibrils.
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Affiliation(s)
- Yehe Liu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Nelly Andarawis-Puri
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Steven J Eppell
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
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Alegre LM, Hasler M, Wenger S, Nachbauer W, Csapo R. Does knee joint cooling change in vivo patellar tendon mechanical properties? Eur J Appl Physiol 2016; 116:1921-9. [PMID: 27473447 PMCID: PMC5020126 DOI: 10.1007/s00421-016-3444-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 07/24/2016] [Indexed: 12/26/2022]
Abstract
Purpose This study aimed to assess the influence of knee joint cooling on the in vivo mechanical properties of the patellar tendon. Methods Twenty young, healthy women volunteered for the study. B-mode ultrasonography was used to record patellar tendon elongation during isometric ramp contraction of the knee extensors (5–7 s, 90° knee angle) and calculate tendon stiffness. Skin temperature was measured by infrared thermometry. Data were acquired before and after 30 min of local icing of the knee joint and compared by paired samples t-tests. Results After cold exposure, skin temperature as measured over the patellar tendon dropped by 16.8 ± 2.0 °C. Tendon stiffness increased from 2189 ± 551 to 2705 ± 902 N mm−1 (+25 %, p = 0.007). Tendon strain decreased by 9 % (p = 0.004). A small, albeit significant reduction in maximum tendon force was observed (−3.3 %, p = 0.03). Conclusions Knee cooling is associated with a significant increase in patellar tendon stiffness. The observed tendon stiffening may influence the operating range of sarcomeres, possibly limiting the maximal force generation capacity of knee extensor muscles. In addition, a stiffer tendon might benefit rate of force development, thus countering the loss in explosiveness typically described for cold muscles.
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Affiliation(s)
- Luis M Alegre
- GENUD Toledo Research Group, University of Castilla-La Mancha, Avda. Carlos III s/n, 45071, Toledo, Spain
| | - Michael Hasler
- Centre of Technology of Ski and Alpine Sport, Fürstenweg 187, Innsbruck, Austria
| | - Sebastian Wenger
- Centre of Technology of Ski and Alpine Sport, Fürstenweg 187, Innsbruck, Austria
| | - Werner Nachbauer
- Department of Sport Science, University of Innsbruck, Fürstenweg 185, Innsbruck, Austria
| | - Robert Csapo
- Department of Sport Science, University of Innsbruck, Fürstenweg 185, Innsbruck, Austria.
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Wanner M, Sakamoto FH, Avram MM, Anderson RR. Immediate skin responses to laser and light treatments. J Am Acad Dermatol 2016; 74:807-19; quiz 819-20. [DOI: 10.1016/j.jaad.2015.06.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 05/29/2015] [Accepted: 06/03/2015] [Indexed: 12/23/2022]
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MORISAKU T, SOHARA Y, YUI H. Thermal Denaturation of Type I Collagen Fibrils Investigated with Vibrational Circular Dichroism Spectroscopy. KOBUNSHI RONBUNSHU 2015. [DOI: 10.1295/koron.2015-0033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Toshinori MORISAKU
- Department of Chemistry, Faculty of Science, Tokyo University of Science
| | - Yusuke SOHARA
- Department of Chemistry, Faculty of Science, Tokyo University of Science
| | - Hiroharu YUI
- Department of Chemistry, Faculty of Science, Tokyo University of Science
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Gevorkian SG, Allahverdyan AE, Gevorgyan DS, Simonian AL, Hu CK. Stabilization and anomalous hydration of collagen fibril under heating. PLoS One 2013; 8:e78526. [PMID: 24244320 PMCID: PMC3823754 DOI: 10.1371/journal.pone.0078526] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 09/20/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Type I collagen is the most common protein among higher vertebrates. It forms the basis of fibrous connective tissues (tendon, chord, skin, bones) and ensures mechanical stability and strength of these tissues. It is known, however, that separate triple-helical collagen macromolecules are unstable at physiological temperatures. We want to understand the mechanism of collagen stability at the intermolecular level. To this end, we study the collagen fibril, an intermediate level in the collagen hierarchy between triple-helical macromolecule and tendon. METHODOLOGY/PRINCIPAL FINDING When heating a native fibril sample, its Young's modulus decreases in temperature range 20-58°C due to partial denaturation of triple-helices, but it is approximately constant at 58-75°C, because of stabilization by inter-molecular interactions. The stabilization temperature range 58-75°C has two further important features: here the fibril absorbs water under heating and the internal friction displays a peak. We relate these experimental findings to restructuring of collagen triple-helices in fibril. A theoretical description of the experimental results is provided via a generalization of the standard Zimm-Bragg model for the helix-coil transition. It takes into account intermolecular interactions of collagen triple-helices in fibril and describes water adsorption via the Langmuir mechanism. CONCLUSION/SIGNIFICANCE We uncovered an inter-molecular mechanism that stabilizes the fibril made of unstable collagen macromolecules. This mechanism can be relevant for explaining stability of collagen.
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Affiliation(s)
- Sasun G. Gevorkian
- Institute of Physics, Academia Sinica, Taipei, Taiwan
- Yerevan Physics Institute, Yerevan, Armenia
| | | | - David S. Gevorgyan
- Institute of Fine Organic Chemistry, Scientific-Technological Center of Organic and Pharmaceutical Chemistry, Yerevan, Armenia
| | - Aleksandr L. Simonian
- Materials Research and Education Center, Auburn University, Auburn, Alabama, United States of America
| | - Chin-Kun Hu
- Institute of Physics, Academia Sinica, Taipei, Taiwan
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Zhang Q, Andrew Chan KL, Zhang G, Gillece T, Senak L, Moore DJ, Mendelsohn R, Flach CR. Raman microspectroscopic and dynamic vapor sorption characterization of hydration in collagen and dermal tissue. Biopolymers 2011; 95:607-15. [DOI: 10.1002/bip.21618] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 02/23/2011] [Accepted: 02/23/2011] [Indexed: 11/08/2022]
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