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Khadka K, Strandwitz NC, Ferguson GS. Byproduct-Free Route to Aminosiloxane Monolayers on Silicon/Silicon Dioxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1639-1645. [PMID: 28121157 DOI: 10.1021/acs.langmuir.6b04415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The chemisorption of N-methyl-aza-2,2,4-trimethylsilacyclopentane from either the solution or the vapor phase produces monolayer films on silicon (oxide) substrates. The formation of a covalent siloxane linkage to the surface by this adsorbate is accompanied by ring opening, which produces no byproduct. The resulting secondary amine reacts with maleic anhydride to produce a carboxylic acid-terminated surface, accompanied by the formation of a stable amide bond. These reactions and their products were characterized by a combination of optical ellipsometry, contact-angle goniometry, and X-ray photoelectron spectroscopy.
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Affiliation(s)
- Kiran Khadka
- Department of Chemistry and ‡Department of Materials Science & Engineering, Lehigh University , Bethlehem, Pennsylvania 18015, United States
| | - Nicholas C Strandwitz
- Department of Chemistry and ‡Department of Materials Science & Engineering, Lehigh University , Bethlehem, Pennsylvania 18015, United States
| | - Gregory S Ferguson
- Department of Chemistry and ‡Department of Materials Science & Engineering, Lehigh University , Bethlehem, Pennsylvania 18015, United States
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Escutia-Guadarrama L, Vázquez-Victorio G, Martínez-Pastor D, Nieto-Rivera B, Sosa-Garrocho M, Macías-Silva M, Hautefeuille M. Fabrication of low-cost micropatterned polydimethyl-siloxane scaffolds to organise cells in a variety of two-dimensioanl biomimetic arrangements for lab-on-chip culture platforms. J Tissue Eng 2017; 8:2041731417741505. [PMID: 29225769 PMCID: PMC5714070 DOI: 10.1177/2041731417741505] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 10/18/2017] [Indexed: 12/13/2022] Open
Abstract
We present the rapid-prototyping of type I collagen micropatterns on poly-dimethylsiloxane substrates for the biomimetic confinement of cells using the combination of a surface oxidation treatment and 3-aminopropyl triethoxysilane silanisation followed by glutaraldehyde crosslinking. The aim of surface treatment is to stabilise microcontact printing transfer of this natural extracellular matrix protein that usually wears out easily from poly-dimethylsiloxane, which is not suitable for biomimetic cell culture platforms and lab-on-chip applications. A low-cost CD-DVD laser was used to etch biomimetic micropatterns into acrylic sheets that were in turn replicated to poly-dimethylsiloxane slabs with the desired features. These stamps were finally inked with type I collagen for microcontact printing transfer on the culture substrates in a simple manner. Human hepatoma cells (HepG2) and rat primary hepatocytes, which do not adhere to bare poly-dimethylsiloxane, were successfully seeded and showed optimal adhesion and survival on simple protein micropatterns with a hepatic cord geometry in order to validate our technique. HepG2 cells also proliferated on the stamps. Soft and stiff poly-dimethylsiloxane layers were also tested to demonstrate that our cost-effective process is compatible with biomimetic organ-on-chip technology integrating tunable stiffness with a potential application to drug testing probes development where such cells are commonly used.
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Affiliation(s)
- Lidia Escutia-Guadarrama
- Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
- Laboratorio Nacional de Soluciones Biomiméticas para Diagnóstico y Terapia, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Genaro Vázquez-Victorio
- Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
- Laboratorio Nacional de Soluciones Biomiméticas para Diagnóstico y Terapia, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - David Martínez-Pastor
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Brenda Nieto-Rivera
- Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Marcela Sosa-Garrocho
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Marina Macías-Silva
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad de México, México
- Laboratorio Nacional de Soluciones Biomiméticas para Diagnóstico y Terapia, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Mathieu Hautefeuille
- Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
- Laboratorio Nacional de Soluciones Biomiméticas para Diagnóstico y Terapia, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
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53
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Ansari A, Patel R, Schultheis K, Naumovski V, Imoukhuede PI. A Method of Targeted Cell Isolation via Glass Surface Functionalization. J Vis Exp 2016:54315. [PMID: 27684992 PMCID: PMC5092063 DOI: 10.3791/54315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
One of the limiting factors to the adoption and advancement of personalized medicine is the inability to develop diagnostic tools to probe individual nuances in expression from patient to patient. Current methodologies that try to separate cells to fill this niche result in disruption of physiological expression, making the separation technique useless as a diagnostic tool. In this protocol, we describe the functionalization and optimization of a surface for the cellular capture and release. This functionalized surface integrates biotinylated antibodies with a glass surface functionalized with an aminosilane (APTES), desthiobiotin and streptavidin. Cell release is facilitated through the introduction of biotin, allowing the recollection and purification of cells captured by the surface. This release is done through the targeting of the secondary moiety desthiobiotin, which results in a much more gentle release paradigm. This reduction in harsh reagents and shear forces reduces changes in cellular expression. The functionalized surface captures up to 80% of cells in a single cell mixture and has demonstrated 50% capture in a dual-cell mixture. Applications of this technology to xenografts and cancer separation studies are investigated. Quantification techniques for surface verification such as plate reader and ImageJ analyses are described as well.
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Affiliation(s)
- Ali Ansari
- Department of Bioengineering, University of Illinois at Urbana-Champaign
| | - Reema Patel
- Department of Liberal Arts & Sciences, University of Illinois at Urbana-Champaign
| | - Kinsey Schultheis
- Department of Bioengineering, University of Illinois at Urbana-Champaign
| | - Vesna Naumovski
- Department of Biomedical Engineering, Illinois Institute of Technology
| | - P I Imoukhuede
- Department of Bioengineering, University of Illinois at Urbana-Champaign;
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56
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Godoy-Gallardo M, Mas-Moruno C, Yu K, Manero JM, Gil FJ, Kizhakkedathu JN, Rodriguez D. Antibacterial Properties of hLf1–11 Peptide onto Titanium Surfaces: A Comparison Study Between Silanization and Surface Initiated Polymerization. Biomacromolecules 2015; 16:483-96. [DOI: 10.1021/bm501528x] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Maria Godoy-Gallardo
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
| | - Carlos Mas-Moruno
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
| | - Kai Yu
- Centre
for Blood Research and Department of Pathology and Laboratory Medicine, University of British Columbia, Life Sciences Centre, 2350 Health Sciences Mall, Vancouver, British Columbia Canada, V6T 1Z3
| | - José M. Manero
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
| | - Francisco J. Gil
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
| | - Jayachandran N. Kizhakkedathu
- Centre
for Blood Research and Department of Pathology and Laboratory Medicine, University of British Columbia, Life Sciences Centre, 2350 Health Sciences Mall, Vancouver, British Columbia Canada, V6T 1Z3
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia Canada, V6T 1Z1
| | - Daniel Rodriguez
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
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