Name: fabrication of gradient nanopattern by thermal nanoimprinting technique and screening of the response of human endothelial colony-forming cells
Uploaded: 2018-07-01T14:00:00
Description: Watch this Scientific Journal Video about Fabrication of Gradient Nanopattern by Thermal Nanoimprinting Technique and Screening of the Response of Human Endothelial Colony-forming Cells at JoVE.com

Este trabalho foi financiado pelo programa de pesquisa de ciência básica através da nacional Research Foundation de Coreia (NRF) financiado pelo Ministério da educação, ciência e tecnologia (MEST) [NRF-2015R1D1A1A01060397] e Bio & desenvolvimento de tecnologia médica Programa da NRF financiado pelo Ministério da ciência, TIC & futuro planejamento [NRF-2017M3A9C6029563].

Este estudo foi aprovado pelo Conselho de revisão institucional Hospital Coreia universitário Anam (IRB no. ED170495). Todos os procedimentos foram realizados em conformidade com a declaração de Helsinki e suas alterações posteriores.
1. preparação do substrato de alumínio (Al) por polimento electrolítico
Atenção: Solução de polimento electrolítico é corrosivo e tóxico. Use equipamento de proteção pessoal, incluindo luvas de nitrila...

<ol>
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J., Oikonomou, A., Hill, E., Bayat, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Development+and+functional+evaluation+of+biomimetic+silicone+surfaces+with+hierarchical+micro/nano-topographical+features+demonstrates+favourable+in+vitro+foreign+body+response+of+breast-derived+fibroblasts.">Development and functional evaluation of biomimetic silicone surfaces with hierarchical micro/nano-topographical features demonstrates favourable in vitro foreign body response of breast-derived fibroblasts.</a> Biomaterials. 52, 88-102 (2015).</li><li>Seo, H. R., Joo, H. J., Kim, D. H., Cui, L. H., Choi, S. C., Kim, J. H., Cho, S. W., Lee, K. B., Lim, D. 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Fabricação de um AAO frequentemente sofre de defeitos tais como fissuras, formas irregulares de poros e queimando. A principal razão para esses defeitos é chamada uma repartição eletrolítica, que é fortemente afetada pela natureza das substratos metálicos sendo anodizado e a resistividade do eletrólito21. Desde que a resistividade do eletrólito varia de acordo com sua temperatura, eliminar o calor continuamente de eletrodos é o ponto crítico para manter a temperatura locacionais do el...

Recentemente, a resposta das células por estimulação física de topografia da superfície tem sido em destaque no campo da célula engenharia1,2,3,4. Portanto, mais atenção tem sido focada em nanoestruturas tridimensionais no celular acessório superfície5. Tem sido relatado que a integrina, que é o dispositivo de reconhecimento de superfície da célula, transmite o estímulo físico conduzido pelas estruturas micro-nano de ECM a transdução mechano6. Esta estimulação mecânica regula o comportamento da célula através de de orientação contato7 e induz a reorganização do citoesqueleto para mudar de forma, além de aderências focais e rigidez de células8.
Células progenitoras endoteliais humanas (hEPCs) no corpo interagem estreitamente com o microambiente do ECM circundante9. Isso indica que o estado físico de ECM atua como um parâmetro importante para a formação de complexos adesão célula-matriz específica como tensão de cisalhamento derivado de fluxo de sangue10. É relatado que nanotopography superfície aumenta a formação de redes de tubo capilar extensa de hEPCs11 em vitro e que um fator solúvel ECM/bio combinado sistema permite hEPCs reconhecer substratos disfuncionais e promove ferida cura12,13. No entanto, a relação entre ECM e hEPCs não é claramente entendida.
Embora muitos pesquisadores tentaram esclarecer a relação entre as respostas de célula e sinais físicos de diferentes substratos14,15,16, estes estudos usado apenas o tamanho fixo de um nanostructure ou nanopatterns com arranjos irregulares que possuem uma limitação para elucidar a relação entre o tamanho do comportamento nanostructure e celular. O problema é a falta de instrumentos adequados para a seleção de respostas celulares que podem substituir as abordagens existentes tediosas e iterativas para encontrar o tamanho ideal do nanostructure. Portanto, uma técnica simples é necessária para reações de célula em estímulos físicos sem repetição de triagem.
Aqui, descrevemos um método usado em nossos anteriores relatórios17,18,19 , para produzir um gradiente nanopattern em que o diâmetro da nanopillars arranjado aumenta gradualmente. Além disso, também descrevemos como cultivar e analisar o comportamento de hECFCs em placas de gradiente nanopattern para determinar o efeito de estímulos físicos sobre as células. Um suave anodização, gravura gradual e método de revestimento de camada decolagem foram usados para fabricar o molde AAO gradiente. Adotando uma térmica impressão técnica de litografia, nanopatterns gradientes poliestireno idênticos foram produzidas de forma econômica e fácil. Usando gradiente nanopatterns, é possível determinar qual o tamanho de nanostructure tem um grande efeito sobre o comportamento da célula em um conjunto de experiência. Esperamos que este gradiente nanopattern será útil na compreensão dos mecanismos de interação entre hECFC derivados de sangue ou outras células e vários tamanhos de nanoestruturas.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Perchloric acid 60%</td>
			<td>Daejung Chemicals &#38; Metals</td>
			<td>6512-4100</td>
			<td></td>
		</tr>
		<tr>
			<td>Ethyl alcohol, absolute 99.9%</td>
			<td>Daejung Chemicals &#38; Metals</td>
			<td>4118-4100</td>
			<td></td>
		</tr>
		<tr>
			<td>Phosphoric acid 85%</td>
			<td>Daejung Chemicals &#38; Metals</td>
			<td>6532-4400</td>
			<td></td>
		</tr>
		<tr>
			<td>Methyl alcohol 99.5%</td>
			<td>Daejung Chemicals &#38; Metals</td>
			<td>5558-4400</td>
			<td></td>
		</tr>
		<tr>
			<td>Chromium(VI) oxide</td>
			<td>Daejung Chemicals &#38; Metals</td>
			<td>2558-4400</td>
			<td></td>
		</tr>
		<tr>
			<td>Sulfuric acid 95%</td>
			<td>Daejung Chemicals &#38; Metals</td>
			<td>7781-4100</td>
			<td></td>
		</tr>
		<tr>
			<td>Hydrogen peroxide 30%</td>
			<td>Daejung Chemicals &#38; Metals</td>
			<td>4104-4400</td>
			<td></td>
		</tr>
		<tr>
			<td>n-hexane 95%</td>
			<td>Daejung Chemicals &#38; Metals</td>
			<td>4081-4400</td>
			<td></td>
		</tr>
		<tr>
			<td>Toluene 99.5%</td>
			<td>Daejung Chemicals &#38; Metals</td>
			<td>8541-4400</td>
			<td></td>
		</tr>
		<tr>
			<td>(heptadecafluoro-1,1,2,2,-tetrahydrodecyl)dimethylchlorosilane</td>
			<td>Gelest</td>
			<td>SIH5840.4</td>
			<td>Moisture sensitive</td>
		</tr>
		<tr>
			<td>Methoxynonafluorobutane 99%</td>
			<td>Sigma aldrich</td>
			<td>464309</td>
			<td></td>
		</tr>
		<tr>
			<td>Collagen solution</td>
			<td>Stemcell</td>
			<td>#4902</td>
			<td></td>
		</tr>
		<tr>
			<td>Gelatin</td>
			<td>Sigma aldrich</td>
			<td>G1890</td>
			<td>Protein coating solution</td>
		</tr>
		<tr>
			<td>Ficoll-Paque</td>
			<td>GE Heathcare</td>
			<td>17-1440-03</td>
			<td>Hydrophilic polysaccharide solution</td>
		</tr>
		<tr>
			<td>EGM-2MV</td>
			<td>Lonza</td>
			<td>CC-3202</td>
			<td>Endothelial cell expansion medium</td>
		</tr>
		<tr>
			<td>Penicillin-Streptomycin</td>
			<td>Gibco</td>
			<td>15140-122</td>
			<td></td>
		</tr>
		<tr>
			<td>Phosphate buffered saline</td>
			<td>Gibco</td>
			<td>10010031</td>
			<td></td>
		</tr>
		<tr>
			<td>Fetal bovine serum</td>
			<td>Gibco</td>
			<td>12483-020</td>
			<td></td>
		</tr>
		<tr>
			<td>Paraformaldehyde</td>
			<td>Sigma aldrich</td>
			<td>P6148</td>
			<td></td>
		</tr>
		<tr>
			<td>Glutaraldehyde</td>
			<td>Sigma aldrich</td>
			<td>G5882-100ML</td>
			<td></td>
		</tr>
		<tr>
			<td>Osmium tetroxide</td>
			<td>Sigma aldrich</td>
			<td>201030-1G</td>
			<td></td>
		</tr>
		<tr>
			<td>Hexamethyldisilazane</td>
			<td>Sigma aldrich</td>
			<td>440191</td>
			<td></td>
		</tr>
		<tr>
			<td>Triton X-100</td>
			<td>Sigma aldrich</td>
			<td>X100-100ML</td>
			<td>Octylphenol ethoxylate&#160;</td>
		</tr>
		<tr>
			<td>Goat serum</td>
			<td>Gibco</td>
			<td>26050-088</td>
			<td></td>
		</tr>
		<tr>
			<td>anti-human vinculin primary antibody&#160;</td>
			<td>Sigma aldrich</td>
			<td>V9131</td>
			<td></td>
		</tr>
		<tr>
			<td>F-actin probe</td>
			<td>Molecular Probes</td>
			<td>A12379</td>
			<td>Fluorescence-conjugated phalloidin</td>
		</tr>
		<tr>
			<td>Alexa Fluor 488-conjugated anti-mouse&#160;IgG antibody</td>
			<td>Molecular Probes</td>
			<td>A11001</td>
			<td>Fluorescence-conjugated secondary antibody&#160;</td>
		</tr>
		<tr>
			<td>4&#39;,6-diamidino-2-phenylindole&#160;</td>
			<td>Sigma aldrich</td>
			<td>D9542</td>
			<td></td>
		</tr>
		<tr>
			<td>Mounting medium</td>
			<td>DAKO</td>
			<td>S3023</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-human vWF primary antibody&#160;</td>
			<td>DAKO</td>
			<td>A0082</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-human&#160;CD144 primary antibody&#160;</td>
			<td>BD Biosciences</td>
			<td>#555661</td>
			<td></td>
		</tr>
		<tr>
			<td>Eponate 12&#8482; Embedding Kit, with BDMA</td>
			<td>Ted Pella</td>
			<td>18012</td>
			<td>Epoxy resin</td>
		</tr>
		<tr>
			<td>Uranyl Acetate, 25g</td>
			<td>Ted Pella</td>
			<td>19481</td>
			<td></td>
		</tr>
		<tr>
			<td>Lead Citrate, Trihydrate, 10g</td>
			<td>Ted Pella</td>
			<td>19312</td>
			<td></td>
		</tr>
		<tr>
			<td>Ultra pure aluminum plate</td>
			<td>Goodfellow</td>
			<td>26050-088</td>
			<td></td>
		</tr>
		<tr>
			<td>Polystyrene sheet</td>
			<td>Goodfellow</td>
			<td>ST313120</td>
			<td></td>
		</tr>
		<tr>
			<td>8.0&#34; silicon wafer</td>
			<td>Siltron</td>
			<td>29-01024-03</td>
			<td>Single side polished, 725 &#181;m thick</td>
		</tr>
		<tr>
			<td>Vacuum desiccator, 4.4 L</td>
			<td>Kartell</td>
			<td>KA.230</td>
			<td></td>
		</tr>
		<tr>
			<td>Vacuum pump</td>
			<td>Vacuumer</td>
			<td>V3.VOP100</td>
			<td></td>
		</tr>
		<tr>
			<td>Power supply</td>
			<td>Unicorntech</td>
			<td>UDP-3003</td>
			<td></td>
		</tr>
		<tr>
			<td>Magnetic stirrer</td>
			<td>Daihan scientific</td>
			<td>SL.SMS03022</td>
			<td></td>
		</tr>
		<tr>
			<td>Overhead stirrer</td>
			<td>Daihan scientific</td>
			<td>HT120DX</td>
			<td></td>
		</tr>
		<tr>
			<td>Circulator</td>
			<td>Daihan scientific</td>
			<td>WCR-P12</td>
			<td></td>
		</tr>
		<tr>
			<td>Linear moving stage</td>
			<td>Zaber</td>
			<td>A-LSQ300A-E01-KT07</td>
			<td></td>
		</tr>
		<tr>
			<td>Angle bracket, 90 degrees</td>
			<td>Zaber</td>
			<td>AB90M</td>
			<td>Accessory of the linear moving stage</td>
		</tr>
		<tr>
			<td>PMP forcep, 145 mm</td>
			<td>Vitlab</td>
			<td>67995</td>
			<td>Nonmetallic tweezer</td>
		</tr>
		<tr>
			<td>PTFE beaker, 250 mL</td>
			<td>Cowie</td>
			<td>CW007.25</td>
			<td></td>
		</tr>
		<tr>
			<td>Ultrasonic cleaner</td>
			<td>Branson</td>
			<td>B2510MTH</td>
			<td></td>
		</tr>
		<tr>
			<td>PCB cutter</td>
			<td>Hozan Tool Industrial</td>
			<td>K-110</td>
			<td></td>
		</tr>
		<tr>
			<td>Nanoimprint device</td>
			<td>Nanonex</td>
			<td>NX-2000</td>
			<td></td>
		</tr>
		<tr>
			<td>Oxygen plasma generator</td>
			<td>Femto Science</td>
			<td>CUTE</td>
			<td></td>
		</tr>
		<tr>
			<td>Low temperature sterilizer</td>
			<td>Lowtem</td>
			<td>Crystal 50</td>
			<td></td>
		</tr>
		<tr>
			<td>CO2 Incubator</td>
			<td>Panasonic</td>
			<td>MCO-18AC</td>
			<td></td>
		</tr>
		<tr>
			<td>Confoal laser scanning microscope</td>
			<td>Carl Zeiss</td>
			<td>LSM700</td>
			<td></td>
		</tr>
		<tr>
			<td>Scanning electron microscope</td>
			<td>JEOL</td>
			<td>JSM6701</td>
			<td></td>
		</tr>
		<tr>
			<td>Transmission electron microscope</td>
			<td>Hitachi</td>
			<td>H-7500</td>
			<td></td>
		</tr>
	</tbody>
</table>

fabrication of gradient nanopattern by thermal nanoimprinting technique and screening of the response of human endothelial colony-forming cells

Nanotopography pode ser encontrado em várias matrizes extracelulares (ECMs) em torno do corpo e é conhecido por ter importantes acções regulamentares sobre reações celulares. No entanto, é difícil determinar a relação entre o tamanho de um nanostructure e as respostas das células devido à falta de ferramentas de triagem adequada. Aqui, nós mostramos o desenvolvimento de placas de nanopattern gradiente reprodutível e de baixo custo para a manipulação de respostas celulares. Usando o óxido de alumínio anódico (AAO) como um molde mestre, placas de gradiente nanopattern com nanopillars de intervalos de diâmetro crescente [120-200 nm (GP 120/200), 200-280 nm (GP 200/280) e 280-360 nm (GP 280/360)] foram fabricados por uma térmica impressão técnica. Estas placas de gradiente nanopattern foram projetadas para imitar os vários tamanhos de nanotopography em ECM e foram usadas para a tela de respostas do humanas formadoras células endoteliais (hECFCs). Neste protocolo, descrevemos o procedimento passo a passo de fabricação de placas de gradiente nanopattern para celular, técnicas de cultivo hECFCs de sangue periférico humano e cultivo hECFCs em placas de nanopattern de engenharia.

A Figura 1 mostra SEM imagens dos moldes AAO gradientes fabricados de acordo com seu tipo e posição. A Figura 2 mostra SEM imagens das placas de gradiente nanopattern com nanopillars regular-arredondado, e a Figura 3 é dados de quantificação do diâmetro nanopillar. A tabela 1 lista as características da nanopillars fabricados.
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Watch this Scientific Journal Video about Fabrication of Gradient Nanopattern by Thermal Nanoimprinting Technique and Screening of the Response of Human Endothelial Colony-forming Cells at JoVE.com

Fabrication of Gradient Nanopattern by Thermal Nanoimprinting Technique and Screening of the Response of Human Endothelial Colony-forming Cells

Aqui, apresentamos um protocolo para a fabricação de placas de gradiente nanopattern através de nanoimprinting térmica e o método de triagem respostas de células progenitoras endoteliais humanas para as nanoestruturas. Usando a tecnologia descrita, é possível produzir um andaime que pode manipular o comportamento de célula por estímulos físicos.

Fabricação de gradiente Nanopattern pela técnica de Nanoimprinting térmica e rastreio da resposta das células formadoras endoteliais humanas

Nanotopography can be found in various extracellular matrices (ECMs) around the body and is known to have important regulatory actions upon cellular ...

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Fabricação de Micro-tecidos utilizando Módulos de Colágeno Gel células contendo

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Human Cartilage Tissue Fabrication Using Three-dimensional Inkjet Printing Technology

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In order to mimic cell membranes, the supported lipid bilayer (SLB) is an attractive platform which enables in vitro investigation of membrane-related ...

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Corneal endothelial cell cultures have a tendency to undergo epithelial-to-mesenchymal transition (EMT) after loss of cell-to-cell contact. EMT is ...

Preclinical Cardiac Electrophysiology Assessment by Dual Voltage and Calcium Optical Mapping of Human Organotypic Cardiac Slices

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