Name: stabilizing hepatocellular phenotype using optimized synthetic surfaces
Uploaded: 2014-09-26T14:00:00
Description: Watch this Scientific Journal Video about Stabilizing Hepatocellular Phenotype Using Optimized Synthetic Surfaces at JoVE.com

DCH, MB y FK fueron apoyados por un seguimiento EPSRC el Fondo. BL-V y DS fueron cada apoyados por becas de doctorado MRC. KC fue apoyado por la financiación de la Plataforma de Medicina Regenerativa del Reino Unido.

1 Síntesis de PHNGAD (Poli [1,6-hexanodiol / neopentil glicol / di (etilenglicol)-ácido adípico -alt] diol) <img alt="Esquema 1" fo:content-width="5in" src="/files/ftp_upload/51723/51723scheme1.jpg" width="500" /> Esquema 1: Síntesis de PHNAGD Representación esquemática de la síntesis de PHNAGD.. PHNAGD se preparó por la reacción de 1,6-Hexanodiol, dietilenglicol, neoppentyl y ácido adípico. PHNAGD, Poly [1,6-hexanodiol / neopentil glicol / di (etilenglicol)-ácid...

<ol>
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Muchos de los métodos actuales utilizados para generar hepatocitos a partir de células madre se basan en matrices indefinidos de origen animal. Estos sustratos pueden ser costosos y altamente variable, que afecta a la función celular y la estabilidad, lo que representa una barrera significativa a la aplicación. Por lo tanto, se realizó una pantalla para materiales sintéticos que apoyan la cultura de células madre de hepatocitos derivados. Hemos identificado, un poliuretano sencilla (PU134), formado por la polimer...

Los materiales biológicos han sido ampliamente utilizados en el mantenimiento y diferenciación de células madre pluripotentes 1. Al tiempo que permite, estos sustratos biológicos a menudo contienen una gran cantidad de componentes no definidos. Matrigel es un sustrato comúnmente utilizado para el cultivo de células madre y la diferenciación. Desafortunadamente, su composición variable influye en la función celular y el fenotipo. Aunque una variedad de matrices biológicas alternativas, más definidos se han utilizado 2-7, su origen animal o pobre escalabilidad les hace candidatos inadecuados para la fabricación industrial. Por lo tanto, la identificación de alternativas sintéticas, con composición definida y un rendimiento fiable, son objetivos clave en la investigación de células madre. En un intento de superar las limitaciones de los sustratos de cultivo de células definidos, colaboraciones interdisciplinarios entre la química y la biología han identificado materiales sintéticos con la capacidad de soportar el fenotipo celular. Synthsustratos etic son escalables, rentables, y se pueden fabricar en complejas estructuras 3D, imitando el entorno en vivo. Debido a estas propiedades sustratos sintéticos han sido ampliamente utilizados para apoyar y conducir la diferenciación de muchos tipos de células 8-10. Ensayos avanzados y de alto rendimiento han facilitado la rápida detección de los materiales sintéticos, de grandes bibliotecas, y entregado nuevos materiales con propiedades flexibles con amplias aplicaciones en la investigación y el desarrollo 11-13 biomédica. La utilización de un alto rendimiento, tecnología de tramado polímero micro-array, identificamos rápidamente en un sencillo de poliuretano (PU134), adecuado para el mantenimiento de los hepatocitos derivados de células madre humanas. Este polímero se encontró que era superior a sustratos derivados de animales con respecto a la diferenciación y la función de los hepatocitos 14-16. Hemos optimizado posteriormente el proceso de condiciones de recubrimiento, la topografía y la esterilización para acceder a efectosen el rendimiento del polímero en la estabilización de función de los hepatocitos y la vida útil. Esto tiene implicaciones significativas en cuanto a la comprensión de los fundamentos de la biología de los hepatocitos para el modelado basado en células y aplicaciones de medicina regenerativa. La tecnología aquí descrita representa un ejemplo de cómo la superficie de un polímero sintético puede ser optimizado para preservar el fenotipo celular. Creemos que la combinación de esta tecnología con un protocolo de diferenciación de hepatocitos sin suero eficiente tiene el potencial de proporcionar una producción escalable de hepatocitos para su uso en modelado in vitro y la medicina regenerativa.

<table border="0" cellpadding="0" cellspacing="0">
	<tbody>
		<tr>
			<td></td>
			<td></td>
			<td></td>
			<td>Synthesis, preparation, coating and characterization of polymer PU134 coated coverslips</td>
		</tr>
		<tr>
			<td>Shaker</td>
			<td>Edmun B&#252;hler</td>
			<td>KS-15</td>
			<td></td>
		</tr>
		<tr>
			<td>Irradiator</td>
			<td>CIS Biointernational</td>
			<td>IBL 637&#160;</td>
			<td></td>
		</tr>
		<tr>
			<td>Spin coater</td>
			<td>Specialty Coating System</td>
			<td>&#160;P-6708</td>
			<td></td>
		</tr>
		<tr>
			<td>Scanning Electron Microscope&#160;</td>
			<td>Philips</td>
			<td>XL30CPSEM</td>
			<td></td>
		</tr>
		<tr>
			<td>Atomic Force Microscope</td>
			<td>DimensionV Nanoscope, VEECO</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>p4-GLO CYP3A4</td>
			<td>Promega</td>
			<td>V8902</td>
			<td></td>
		</tr>
		<tr>
			<td>UV bulb</td>
			<td>ESCO</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>NanoScope analysis software</td>
			<td>VEECO</td>
			<td></td>
			<td>version 1.20</td>
		</tr>
		<tr>
			<td>Fluorescence microscope</td>
			<td>Olympus</td>
			<td>TH45200</td>
			<td>Use Volocity 4 Software</td>
		</tr>
		<tr>
			<td>Tissue culture plates</td>
			<td>Corning, UK&#160;</td>
			<td>3527</td>
			<td></td>
		</tr>
		<tr>
			<td>glass slides</td>
			<td>Scientific Laboratory Supplies</td>
			<td>MIC3308</td>
			<td></td>
		</tr>
		<tr>
			<td>Diethylene glycol</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>93171</td>
			<td></td>
		</tr>
		<tr>
			<td>&#160;1,6-hexanediol</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>240117</td>
			<td></td>
		</tr>
		<tr>
			<td>Neopentyl glycol</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>408255</td>
			<td></td>
		</tr>
		<tr>
			<td>Adipic acid</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>9582</td>
			<td></td>
		</tr>
		<tr>
			<td>anhydrous N,N-Dimethylformamide</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>227056</td>
			<td></td>
		</tr>
		<tr>
			<td>Diethyl ether</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>676845</td>
			<td></td>
		</tr>
		<tr>
			<td>titanium (IV) butoxide&#160;</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>244112</td>
			<td></td>
		</tr>
		<tr>
			<td>1,4-butanediol&#160;</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>493732</td>
			<td></td>
		</tr>
		<tr>
			<td>Vacuum oven</td>
			<td>Thermoscientific</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>4,4&#8217;-Methylenebis(phenyl isocyanate)</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>101688</td>
			<td></td>
		</tr>
		<tr>
			<td>Tetrahydrofurane</td>
			<td>Sigma&#8211;Aldrich</td>
			<td>401757</td>
			<td></td>
		</tr>
		<tr>
			<td>Sputter coater</td>
			<td>Bal-Tec SCD 050</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td></td>
			<td></td>
			<td></td>
			<td>Inmunostaining</td>
		</tr>
		<tr>
			<td>Phosphate buffer saline (-MgCl2, -CaCl2)</td>
			<td>Gibco</td>
			<td>10010031</td>
			<td>&#160;Store at room temperature</td>
		</tr>
		<tr>
			<td>PBST, PBS made up with 0.1% TWEEN 20&#160;</td>
			<td>&#160; Scientific Laboratory Supplies Ltd</td>
			<td>EC607&#160;</td>
			<td></td>
		</tr>
		<tr>
			<td>Methanol</td>
			<td>&#160; Scientific Laboratory Supplies Ltd</td>
			<td>CHE5010</td>
			<td></td>
		</tr>
		<tr>
			<td>Bovine Serum Albumin</td>
			<td>Sigma-Aldrich, UK</td>
			<td>A7906</td>
			<td></td>
		</tr>
		<tr>
			<td>MOWIOL 488 DAPI</td>
			<td>Calbiochem</td>
			<td>475904</td>
			<td>Made up in Tris HCL and glycerol as per manufacturers instructions</td>
		</tr>
		<tr>
			<td></td>
			<td></td>
			<td></td>
			<td>Cell culture and Functional assay</td>
		</tr>
		<tr>
			<td>CYP3A activity pGLO kit</td>
			<td>Promega</td>
			<td>V8902</td>
			<td></td>
		</tr>
		<tr>
			<td>Hepatozyme</td>
			<td>Gibco</td>
			<td>17705021</td>
			<td></td>
		</tr>
		<tr>
			<td>TryLE express</td>
			<td>Life Technologies</td>
			<td><a href="http://www.lifetechnologies.com/order/catalog/product/12604013">12604013</a></td>
			<td></td>
		</tr>
	</tbody>
</table>

stabilizing hepatocellular phenotype using optimized synthetic surfaces

Currently, one of the major limitations in cell biology is maintaining differentiated cell phenotype. Biological matrices are commonly used for culturing and maintaining primary and pluripotent stem cell derived hepatocytes. While biological matrices are useful, they permit short term culture of hepatocytes, limiting their widespread application. We have attempted to overcome the limitations using a synthetic polymer coating. Polymers represent one of the broadest classes of biomaterials and possess a wide range of mechanical, physical and chemical properties, which can be fine-tuned for purpose. Importantly, such materials can be scaled to quality assured standards and display batch-to-batch consistency. This is essential if cells are to be expanded for high through-put screening in the pharmaceutical testing industry or for cellular based therapy. Polyurethanes (PUs) are one group of materials that have shown promise in cell culture. Our recent progress in optimizing a polyurethane coated surface, for long-term culture of human hepatocytes displaying stable phenotype, is presented and discussed.

Disolvente de polímero influye en la topografía de la superficie del polímero recubierto Poliuretano 134 se solubilizó en cloroformo, ya sea solo o en combinación con tolueno o tetrahidrofurano o diclorometano y los portaobjetos de vidrio mediante revestimiento por centrifugación con las diferentes formulaciones. Microscopía electrónica de barrido (SEM) y microscopía de fuerza atómica (AFM) se utilizaron para caracterizar las propiedades físicas de los revestimien...

Watch this Scientific Journal Video about Stabilizing Hepatocellular Phenotype Using Optimized Synthetic Surfaces at JoVE.com

Stabilizing Hepatocellular Phenotype Using Optimized Synthetic Surfaces

Este artículo se centrará en el desarrollo de superficies de polímero recubierto de largo plazo, la cultura estable de células madre derivadas de hepatocitos humanos.

Estabilizar hepatocelular Fenotipo Usando superficies sintéticas optimizadas

Currently, one of the major limitations in cell biology is maintaining differentiated cell phenotype. Biological matrices are commonly used for culturing ...

Research

JoVE Journal

Chemistry

Covalent Binding of BMP-2 on Surfaces Using a Self-assembled Monolayer Approach

Unión covalente de BMP-2 en las superficies utilizando una monocapa enfoque de auto-ensamblada

Bone morphogenetic protein 2 (BMP-2) is a growth factor embedded in the extracellular matrix of bone tissue. BMP-2 acts as trigger of mesenchymal cell ...

Investigación

Química

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation

Hacia Biomimicking Madera: Fabricada en monobloque películas de nanocellulose, lignina, y una Policatión sintético

Woody materials are comprised of plant cell walls that contain a layered secondary cell wall composed of structural polymers of polysaccharides and ...

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

In Situ SIMS y espectroscopia IR de superficies bien definidas Preparado por Soft Landing de iones seleccionados-Mass

Soft landing of mass-selected ions onto surfaces is a powerful approach for the highly-controlled preparation of materials that are inaccessible using ...

Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology

Metodología sintética para asimétrica Ferroceno derivados Sistemas de Bio-conjugadas vía sólida metodología a base de resina de fase

Early detection is a key to successful treatment of most diseases, and is particularly imperative for the diagnosis and treatment of many types of cancer. ...

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues

Optimización de las proteínas sintéticas: Identificación de interposicional Dependencias de indicación Estructuralmente y / o Residuos Funcionalmente Vinculados

Protein alignments are commonly used to evaluate the similarity of protein residues, and the derived consensus sequence used for identifying functional ...

An Optimized Protocol for the Efficient Radiolabeling of Gold Nanoparticles by Using a 125I-labeled Azide Prosthetic Group

An Optimized Protocol for the Efficient Radiolabeling of Gold Nanoparticles by Using a 125I-labeled Azide Prosthetic Group

Un protocolo optimizado para el radiomarcaje eficaz de nanopartículas de oro mediante el uso de una<sup&gt; 125</sup&gt; Azida grupo prostético marcado con I

Here, we demonstrate a detailed protocol for the radiosynthesis of a 125I-labeled azide prosthetic group and its application to the efficient ...

Color Spot Test As a Presumptive Tool for the Rapid Detection of Synthetic Cathinones

Prueba color como una herramienta presuntiva para la detección rápida de sintético Cathinones

Synthetic cathinones are a large class of new psychoactive substances (NPS) that are increasingly prevalent in drug seizures made by law enforcement and ...

Characterization of Synthetic Polymers via Matrix Assisted Laser Desorption Ionization Time of Flight (MALDI-TOF) Mass Spectrometry

Characterization of Synthetic Polymers via Matrix Assisted Laser Desorption Ionization Time of Flight MALDI-TOF Mass Spectrometry

Caracterización de polímeros sintéticos vía matriz asistida por láser desorción de ionización tiempo de vuelo (MALDI-TOF) espectrometría de masas

There are many techniques that can be employed in the characterization of synthetic homopolymers, but few provide as useful of information for end group ...

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

Motores moleculares basadas en la luz en superficies para la proyección de imagen Molecular solo

The design and synthesis of a synthetic system that aims for the direct visualization of a synthetic rotary motor at the single molecule level on surfaces ...

A Facile Synthetic Method to Obtain Bismuth Oxyiodide Microspheres Highly Functional for the Photocatalytic Processes of Water Depuration

Un fácil método sintético para obtener microesferas de Oxyiodide de bismuto altamente funcional para los procesos fotocatalíticos de depuración de aguas

Bismuth oxyhalide (BiOI) is a promising material for sunlight-driven-environmental photocatalysis. Given that the physical structure of this kind of ...