Estudios en humanos con células madre embrionarias en el laboratorio Teitell el apoyo de un Instituto de Medicina Regenerativa de California (CIRM), las semillas de subvención RS1-00313. Agradecemos a los miembros del Centro de Medicina Regenerativa de amplias e Investigación de Células Madre de la UCLA, en especial el Dr. Amander Clark, el doctor Jerome Zack, y los miembros del Fondo para el UCLA amplio núcleo de célula madre Instituto por el apoyo de nuestros estudios.

células madre de mantenimiento cultura cotidiana <ol><li> los medios de comunicación la cultura células madre debe ser cambiado cada 24 horas. Desde el frasco ES medios se almacenan a 4 ° C, retirar la cantidad de solución necesaria (~ 20 ml por cada 6 y placa), en un tubo de 50 ml de halcón, y calentar a 37 ° C en un baño de agua. Una vez que los medios de comunicación se calienta, añade bFGF se almacenan a 4 ° C a una concentración final de 10ng/ml. Poner el stock de bFGF volver a 4 º C inmediatamente después de su uso! </li><li> Eliminar de las placas de 6 pocillos, pero todos ~ 500μl de los medios de comunicación. Asegúrese de girar la placa de cultivo de suspender los desechos para su eliminación. Asegúrese de que el bFGF en los medios de células madre a la cultura se mezcla y añadir 3 ml de medio fresco de nuevo a cada pocillo de una placa de 6 pocillos. Vuelva a colocar la placa en la incubadora. </li></ol> HESCs división de MEFs en Matrigel Por lo general, una confluencia de 6 pocillos de hESCs en MEFs se puede dividir 01:02-01:03 Matrigel en placas de 6 pocillos, con los pozos cada vez más confluentes 4-5 días después de partir. <ol><li> Cuando hESCs dividir en Matrigel, MEF acondicionado medios de comunicación (CM) se utiliza para mantener la pluripotencialidad. MEF acondicionado medios de comunicación se realiza por adelantado. En el primer día, 1,5 × 10 7 γ-irradiado MEFs se siembran en un frasco T75. En el segundo día, MEFs se lavan una vez con una temperatura ambiente de 1 × PBS, pH 7,4, y luego 15 ml de los medios de comunicación ES complementado con 5ng/ml bFGF se añade a la botella. (NOTA: MEFs se sembraron en frascos pequeños o más grandes, pero la proporción entre la densidad de las células y el volumen de los medios de comunicación ES debe ser constante.) El frasco se incuba a 37 ° C durante otras 24 horas. En el tercer día, el CM se recoge y se reemplaza con 15 ml de los medios de comunicación ES fresco suplementado con 5ng/ml bFGF. El CM recogidos se almacenan a 4 ° C. MEF acondicionado medios de comunicación de un revestimiento de MEFs se cosechan más de siete días consecutivos, para generar 15 x 7 = 105ml. Después de siete días, todas las fracciones de CM se reúnen, se filtra de manera estéril, alícuotas y almacenado a -20 ° C. Los medios de comunicación CM preparado como se describe puede ser almacenada y utilizada durante 1 mes. </li><li> Un día antes de partir células madre, puesto alícuotas de Matrigel en tubos Eppendorf a 4 ° C para descongelar la noche (una alícuota contiene 76.2mg de Matrigel, y esta es la cantidad necesaria para un 6 y placa). En el día de partir, tomar un vial de la Matrigel descongelado para una de 6 pocillos, ponga el vial y 6 ml de frío DMEM/F12 los medios de comunicación sobre el hielo. Transferir el Matrigel en el DMEM/F12 los medios de comunicación y mezclar bien. Añadir 1 ml de la solución a cada pocillo de una placa de 6 pocillos. Agitar la placa para distribuir Matrigel en la superficie y se incuba la placa Matrigel cubierto a temperatura ambiente durante al menos 1 hora antes de la división de la hESCs. </li><li> hESCs en MEFs se lavan una vez con PBS 1X, pH 7,4. Posteriormente 1 ml de agua tibia IV colagenasa (1mg/ml) se añade a cada pocillo de la placa de 6 pocillos y luego la placa se incuba a 37 ° C durante 5-10 minutos. </li><li> Añadir 1 ml de los medios de comunicación ES sin bFGF a cada pocillo. Use una pipeta de 1 ml a soplar las células madre de la placa. Recoge todos los medios que contienen grupos de hESCs y MEFs muertos en un tubo de 50 ml de halcón. Vamos a grupos grandes de las células de resolver durante 5-10 minutos para que los grupos células madre forma una bolita en la parte inferior del tubo, mientras que el MEFs permanecen suspendidas en el sobrenadante. Descartar el sobrenadante y lavar por la resuspensión de células madre utilizando los medios de comunicación de pellets ES carece de bFGF, seguido de centrifugación a temperatura ambiente a 200 g por 5 min. </li><li> A la placa de las células madre en las placas de Matrigel, primero se deben lavar los platos Matrigel con la temperatura ambiente DMEM/F12 (1 ml por pocillo) y la adición de 2,5 ml de la CM complementado con 10ng/ml bFGF por pozo. Resuspender el precipitado en un volumen adecuado de CM complementado con 10ng/ml bFGF, pipeta la suspensión de células de arriba a abajo varias veces hasta que los grumos se uniforme y de tamaño pequeño. Alícuota de la suspensión a 0,5 ml por pocillo en la placa de Matrigel. Tenga en cuenta que la densidad de las colonias en Matrigel es mayor que la densidad de las colonias por la división habitual en MEFs. Colocar la placa en un 37 ° C tejidos incubadora de la cultura. </li><li> Para mantener la hESCs en Matrigel, los medios de comunicación CM complementado con 10ng/ml bFGF se cambia cada 24 horas durante un máximo de 4-5 días. </li></ol>

<ol>
	<li>Thomson, J. a. m. e. s. A., Itskovitz-Eldor, J. o. s. e. p. h., Shapiro, S. a. n. d. e. r. S., Waknitz, M. i. c. h. e. l. l. e. A., Swiergiel, J. e. n. n. i. f. e. r. J., Marshall, V. i. v. i. e. n. n. e. S., Jones, J. e. f. f. r. e. y. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Embryonic+Stem+Cell+Lines+Derived+from+Human+Blastocysts++.">Embryonic Stem Cell Lines Derived from Human Blastocysts .</a> Science. 282, 1145-1147 (1998).</li><li>Xu, C. h. u. n. h. u. i., Inokuma, M. a. r. g. a. r. e. t. S., Denham, J. e. r. r. o. d., Golds, K. a. t. h. a. l. e. e. n., Kundu, P. r. a. t. i. m. a., Gold, J. o. s. e. p. h. D., Carpenter, M. e. l. i. s. s. a. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Feeder-free+growth+of+undifferentiated+human+embryonic+stem+cells.">Feeder-free growth of undifferentiated human embryonic stem cells.</a> Nature Biotechnology. 19, 971-974 (2001).</li></ol>

Este video muestra cómo hESCs paso de placas MEF alimentador de placas Matrigel libres de células. Tenga en cuenta que la densidad de las colonias en Matrigel es mayor que la densidad de las colonias por la división habitual en MEFs. La tinción de inmunofluorescencia y citometría de flujo o microscopía para los marcadores de células madre pluripotencia, tales como Oct-4 y SSEA-4, son necesarios para confirmar el mantenimiento de hESCs en estado indiferenciado en condiciones de cultivo libre de alimentación.

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		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
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<tr>
<td>Knockout Serum Replacer (KSR)</td>
<td>Reagent</td>
<td>Gibco</td>
<td>10828-028</td>
<td>&nbsp;</td>
<tr>
<td>DMEM/F12</td>
<td>Reagent</td>
<td>Gibco</td>
<td>11330-057</td>
<td>&nbsp;</td>
<tr>
<td> Non-essential Amino Acids</td>
<td>Reagent</td>
<td>Gibco</td>
<td>11140-050</td>
<td>&nbsp;</td>
<tr>
<td>GlutaMax </td>
<td>Reagent</td>
<td>Gibco</td>
<td>35050-061</td>
<td>&nbsp;</td>
<tr>
<td>DMEM</td>
<td>Reagent</td>
<td>Gibco</td>
<td>11995-065</td>
<td>&nbsp;</td>
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<td>FBS</td>
<td>Reagent</td>
<td>Clontech</td>
<td>631107</td>
<td>&nbsp;</td>
<tr>
<td>L-glutamine</td>
<td>Reagent</td>
<td>Gibco</td>
<td>25030-081</td>
<td>&nbsp;</td>
<tr>
<td>BME</td>
<td>Reagent</td>
<td>Fisher</td>
<td>BP176-100</td>
<td>&nbsp;</td>
<tr>
<td>bFGF</td>
<td>Reagent</td>
<td>R&D Systems</td>
<td>233-FB-025</td>
<td>&nbsp;</td>
<tr>
<td>Collagenase IV</td>
<td>Reagent</td>
<td>Gibco</td>
<td>17104-019</td>
<td>&nbsp;</td>
<tr>
<td>Dispase</td>
<td>Reagent</td>
<td>Stem Cell Technologies</td>
<td>17105-041</td>
<td>&nbsp;</td>
<tr>
<td>Penicillin / Streptomycin </td>
<td>Reagent</td>
<td>Gibco</td>
<td>15140-122</td>
<td>&nbsp;</td>
<tr>
<td>Gelatin</td>
<td>Reagent</td>
<td>Chemicon</td>
<td>ES-006-B</td>
<td>&nbsp;</td>
<tr>
<td>Matrigel</td>
<td>Reagent</td>
<td>BD Biosciences</td>
<td>354277</td>
<td>&nbsp;</td>
<tr>
<td>Oct-4 antibody</td>
<td>Reagent</td>
<td>Santa Cruz Biotechnology</td>
<td>SC-9081</td>
<td>&nbsp;</td>
<tr>
<td>anti-h/mSSEA-4 Phycoerythrin Conjugated Mouse IgG3</td>
<td>Reagent</td>
<td>R&D Systems</td>
<td>FAB1435P</td>
<td>&nbsp;</td>
<tr>
<td>FITCI-conjugated antirabbit IgG</td>
<td>Reagent</td>
<td>Jackson ImmunoResearch Laboratories. Inc.</td>
<td>715-095-152</td>
<td>&nbsp;</td>		</tbody>
		</table>
		</div>
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					</div>

from mefs to matrigel 2: splitting hescs from mefs onto matrigel

Este video muestra la forma de crecer células madre embrionarias humanas (hESCs) en fibroblastos de embriones de ratón (MEF), las células de alimentación, la forma de hESCs paso de placas MEF a la celda sin alimentador de placas Matrigel.

Watch this Scientific Journal Video about From MEFs to Matrigel 2: Splitting hESCs from MEFs onto Matrigel at JoVE.com

From MEFs to Matrigel 2: Splitting hESCs from MEFs onto Matrigel

Este video muestra la forma de mantener el crecimiento de células madre embrionarias humanas (hESCs) en el alimentador de células libres de condiciones y la forma de hESCs paso continuo en el alimentador de células libres de condiciones. La confirmación de células madre cultivadas en el alimentador de pluripotencia de células en condiciones libres por microscopía de inmunofluorescencia se demuestra también.

Desde MEFs a Matrigel 2: La división de hESCs MEFs en Matrigel

This video demonstrates how to grow human embryonic stem cells (hESCs) on mouse embryonic fibroblast (MEF) feeder cells, how to passage hESCs from MEF ...

from-mefs-to-matrigel-2-splitting-hescs-from-mefs-onto-matrigel

Research

JoVE Journal

Biology

11.4K vistas.  University of California, Los Angeles. Este video muestra la forma de mantener el crecimiento de células madre embrionarias humanas (hESCs) en el alimentador de células libres de condiciones y la forma de hESCs paso continuo en el alimentador de células libres de condiciones. La confirmación de células madre cultivadas en el alimentador de pluripotencia de células en condiciones libres por microscopía de inmunofluorescencia se demuestra también.

Video: From MEFs to Matrigel 2: Splitting hESCs from MEFs onto Matrigel

From MEFs to Matrigel I: Passaging hESCs in the Presence of MEFs

This video demonstrates how to grow human embryonic stem cells (hESCs) on mouse embryonic fibroblast (MEF) feeder cells.


This video demonstrates how to grow human embryonic stem cells (hESCs) on mouse embryonic fibroblast (MEF) feeder cells. Part 1 of 3.

Desde que me MEFs Matrigel: hESCs pases en la presencia de MEFs

This video demonstrates how to grow human embryonic stem cells (hESCs) on mouse embryonic fibroblast (MEF) feeder cells.
...

Investigación

Biología

Generating iPS Cells from MEFS through Forced Expression of Sox-2, Oct-4, c-Myc, and Klf4

Pluripotency can be induced in differentiated murine by viral transduction of Oct4, Sox2, Klf4, and c-Myc (Takahashi and Yamanaka, 2006; Wernig, et al., 2007; Okita, et al., 2007; Maherali, et al., 2007). We have devised a reprogramming strategy in which these four transcription factors are expressed from doxycycline (dox)-inducible lentiviral vectors (Brambrink et al., 2008). Using these inducible constructs, we can derive induced pluripotent stem (iPS) cells from mouse embryonic fibroblasts (MEFs). In this video, we demonstrate the procedure for the generation of inducible lentiviruses that express the four transcription factors and show how to infect MEFs with these viruses in order to produce iPS cells. By using inducible lentiviruses, the expression of the four factors in controlled by the addition of doxycyline to the culture medium. The advantage of this system over the traditional retroviral infection is the ability to turn the genes on and off so that the kinetics of reprogramming and gene expression requirements can be analyzed in detail.

This video shows the procedure for generating induced pluripotent stem cells using inducible lentivirus that express Oct4, Sox2, c-Myc and Klf4.

La generación de células iPS a partir de MEFs través de la expresión forzada de Sox-2, Oct-4, c-Myc y Klf4

Pluripotency can be induced in differentiated murine by viral transduction of Oct4, Sox2, Klf4, and c-Myc (Takahashi and Yamanaka, 2006;  Wernig, et al., ...

From MEFs to Matrigel 3: Passaging hESCs from Matrigel onto Matrigel

This video demonstrates how to maintain the growth of human embryonic stem cells (hESCs) in feeder cell-free conditions and how to continuously passage hESCs in feeder cell-free conditions. Confirmation of hESC pluripotency grown in feeder cell-free conditions by immunofluorescence microscopy is also demonstrated.

This video demonstrates how to maintain the growth of human embryonic stem cells (hESCs) in feeder cell-free conditions and how to continuously passage hESCs in feeder cell-free conditions. Confirmation of hESC pluripotency grown in feeder cell-free conditions by immunofluorescence microscopy is also demonstrated. Part 3 of 3.

Desde MEFs a Matrigel 3: hESCs pases de Matrigel en Matrigel

This video demonstrates how to maintain the growth of human embryonic stem cells (hESCs) in feeder cell-free conditions and how to continuously passage ...

Cargo Loading onto Kinesin Powered Molecular Shuttles

Cells have evolved sophisticated molecular machinery, such as kinesin motor proteins and microtubule filaments, to support active intracellular transport of cargo. While kinesins tail domain binds to a variety of cargoes, kinesins head domains utilize the chemical energy stored in ATP molecules to step along the microtubule lattice. The long, stiff microtubules serve as tracks for long-distance intracellular transport.
These motors and filaments can also be employed in microfabricated synthetic environments as components of molecular shuttles 1. In a frequently used design, kinesin motors are anchored to the track surface through their tails, and functionalized microtubules serve as cargo carrying elements, which are propelled by these motors. These shuttles can be loaded with cargo by utilizing the strong and selective binding between biotin and streptavidin. The key components (biotinylated tubulin, streptavidin, and biotinylated cargo) are commercially available.
Building on the classic inverted motility assay 2, the construction of molecular shuttles is detailed here. Kinesin motor proteins are adsorbed to a surface precoated with casein; microtubules are polymerized from biotinylated tubulin, adhered to the kinesin and subsequently coated with rhodamine-labeled streptavidin. The ATP concentration is maintained at subsaturating concentration to achieve a microtubule gliding velocity optimal for loading cargo 3. Finally, biotinylated fluorescein-labeled nanospheres are added as cargo. Nanospheres attach to microtubules as a result of collisions between gliding microtubules and nanospheres adhering to the surface.
The protocol can be readily modified to load a variety of cargoes such as biotinylated DNA4, quantum dots 5 or a wide variety of antigens via biotinylated antibodies 4-6.

Molecular shuttles consisting of functionalized microtubules gliding on surface-adhered kinesin motor proteins can serve as a nanoscale transport system. Here, the assembly of a typical shuttle system is described.

Las operaciones de carga en Kinesin molecular Traslados Desarrollado

Cells have evolved sophisticated molecular machinery, such as kinesin motor proteins and microtubule filaments, to support active intracellular transport ...

An Introduction to Worm Lab: from Culturing Worms to Mutagenesis

This protocol describes procedures to maintain nematodes in the laboratory and how to mutagenize them using two alternative methods: ethyl methane sulfonate (EMS) and 4, 5', 8-trimethylpsoralen combined with ultraviolet light (TMP/UV). Nematodes are powerful biological systems for genetics studies because of their simple body plan and mating system, which is composed of self-fertilizing hermaphrodites and males that can generate hundreds of progeny per animal. Nematodes are maintained in agar plates containing a lawn of bacteria and can be easily transferred from one plate to another using a pick. EMS is an alkylating agent commonly used to induce point mutations and small deletions, while TMP/UV mainly induces deletions. Depending on the species of nematode being used, concentrations of EMS and TMP will have to be optimized. To isolate recessive mutations of the nematode Pristionchus pacificus, animals of the F2 generation were visually screened for phenotypes. To illustrate these methods, we mutagenized worms and looked for Uncoordinated (Unc), Dumpy (Dpy) and Transformer (Tra) mutants.

Screening for mutants with phenotypic defects is a straightforward method for identifying genes that function in a given biological process. In this article we describe how to culture free living worms (e.g., Pristionchus pacificus) in the laboratory and show two different mutagenesis methods, EMS and TMP/UV.

Introducción al Laboratorio de Worm: El cultivo de gusanos de Mutagénesis

This protocol describes procedures to maintain nematodes in the laboratory and how to mutagenize them using two alternative methods: ethyl methane ...

A Matrigel-Based Tube Formation Assay to Assess the Vasculogenic Activity of Tumor Cells

Over the past several decades, a tube formation assay using growth factor-reduced Matrigel has been typically employed to demonstrate the angiogenic activity of vascular endothelial cells in vitro1-5. However, recently growing evidence has shown that this assay is not limited to test vascular behavior for endothelial cells. Instead, it also has been used to test the ability of a number of tumor cells to develop a vascular phenotype6-8. This capability was consistent with their vasculogenic behavior identified in xenotransplanted animals, a process known as vasculogenic mimicry (VM)9. There is a multitude of evidence demonstrating that tumor cell-mediated VM plays a vital role in the tumor development, independent of endothelial cell angiogenesis6, 10-13. For example, tumor cells were found to participate in the blood perfused, vascular channel formation in tissue samples from melanoma and glioblastoma patients8, 10, 11. Here, we described this tubular network assay as a useful tool in evaluation of vasculogenic activity of tumor cells. We found that some tumor cell lines such as melanoma B16F1 cells, glioblastoma U87 cells, and breast cancer MDA-MB-435 cells are able to form vascular tubules; but some do not such as colon cancer HCT116 cells. Furthermore, this vascular phenotype is dependent on cell numbers plated on the Matrigel. Therefore, this assay may serve as powerful utility to screen the vascular potential of a variety of cell types including vascular cells, tumor cells as well as other cells.

A tube formation assay is used to evaluate vascular activity of tumor cells.

A Matrigel basado en tubo de ensayo de formación para evaluar la actividad de las células tumorales vasculogénica

Over the past several decades, a tube formation assay using growth factor-reduced Matrigel has been typically employed to demonstrate the angiogenic ...

Generation of Myospheres From hESCs by Epigenetic Reprogramming

Generation of a homogeneous and abundant population of skeletal muscle cells from human embryonic stem cells (hESCs) is a requirement for cell-based therapies and for a "disease in a dish" model of human neuromuscular diseases. Major hurdles, such as low abundance and heterogeneity of the population of interest, as well as a lack of protocols for the formation of three-dimensional contractile structures, have limited the applications of stem cells for neuromuscular disorders. We have designed a protocol that overcomes these limits by ectopic introduction of defined factors in hESCs - the muscle determination factor MyoD and SWI/SNF chromatin remodeling complex component BAF60C - that are able to reprogram hESCs into skeletal muscle cells. Here we describe the protocol established to generate hESC-derived myoblasts and promote their clustering into tridimensional miniaturized structures (myospheres) that functionally mimic miniaturized skeletal muscles7.

Here, we describe a protocol based on epigenetic reprogramming of human embryonic stem cells (hESCs) toward generating a homogeneous population of skeletal muscle progenitors that under permissive culture conditions form three-dimensional clusters of contractile myofibers (myospheres), which recapitulate biological features of human skeletal muscles.

Generación de Myospheres De hESCs por epigenética Reprogramación

Generation of a homogeneous and abundant population of skeletal muscle cells from human embryonic stem cells (hESCs) is a requirement for cell-based ...

Xenopus laevis as a Model to Identify Translation Impairment

Protein synthesis is a fundamental process to gene expression impacting diverse biological processes notably adaptation to environmental conditions. The initiation step, which involves the assembly of the ribosomal subunits at the mRNA initiation codon, involved initiation factor including eIF4G1. Defects in this rate limiting step of translation are linked to diverse disorders. To study the potential consequences of such deregulations, Xenopus laevis oocytes constitute an attractive model with high degrees of conservation of essential cellular and molecular mechanisms with human. In addition, during meiotic maturation, oocytes are transcriptionally repressed and all necessary proteins are translated from preexisting, maternally derived mRNAs. This inexpensive model enables exogenous mRNA to become perfectly integrated with an effective translation. Here is described a protocol for assessing translation with a factor of interest (here eIF4G1) using stored maternal mRNA that are the first to be polyadenylated and translated during oocyte maturation as a physiological readout. At first, mRNA synthetized by in vitro transcription of plasmids of interest (here eIF4G1) are injected in oocytes and kinetics of oocyte maturation by Germinal Vesicle Breakdown detection is determined. The studied maternal mRNA target is the serine/threonine-protein-kinase mos. Its polyadenylation and its subsequent translation are investigated together with the expression and phosphorylation of proteins of the mos signaling cascade involved in oocyte maturation. Variations of the current protocol to put forward translational defects are also proposed to emphasize its general applicability. In light of emerging evidence that aberrant protein synthesis may be involved in the pathogenesis of neurological disorders, such a model provides the opportunity to easily assess this impairment and identify new targets.

Xenopus laevis as a Model to Identify Translation Impairment

Protein synthesis control occurs mainly at the translation initiation step, deficiencies in which are linked to diverse disorders. To better understand their etiology, we described here a protocol using Xenopus laevis oocytes assessing the translation of mos transcript in the presence of a mutant of translation initiation factor eIF4G1.

Xenopus laevis como modelo para identificar Traducción Deterioro

Protein synthesis is a fundamental process to gene expression impacting diverse biological processes notably adaptation to environmental conditions. The ...

Using Caco-2 Cells to Study Lipid Transport by the Intestine

Studies of dietary fat absorption are generally conducted by using an animal model equipped with a lymph cannula. Although this animal model is widely accepted as the in vivo model of dietary fat absorption, the surgical techniques involved are challenging and expensive. Genetic manipulation of the animal model is also costly and time consuming. The alternative in vitro model is arguably more affordable, timesaving, and less challenging. Importantly, the in vitro model allows investigators to examine the enterocytes as an isolated system, reducing the complexity inherent in the whole organism model. This paper describes how human colon carcinoma cells (Caco-2) can serve as an in vitro model to study the enterocyte transport of lipids, and lipid-soluble drugs and vitamins. It explains the proper maintenance of Caco-2 cells and the preparation of their lipid mixture; and it further discusses the valuable option of using the permeable membrane system. Since differentiated Caco-2 cells are polarized, the main advantage of using the permeable membrane system is that it separates the apical from the basolateral compartment. Consequently, the lipid mixture can be added to the apical compartment while the lipoproteins can be collected from the basolateral compartment. In addition, the effectiveness of the lentivirus expression system in upregulating gene expression in Caco-2 cells is discussed. Lastly, this paper describes how to confirm the successful isolation of intestinal lipoproteins by transmission electron microscopy (TEM).

Caco-2 cells can serve as an in vitro model to study the enterocyte transport of lipids, and lipid-soluble drugs/vitamins. The permeable membrane system separates the apical from the basolateral compartment, while the lentivirus expression system offers an effective gene overexpression method. The isolation of lipoproteins is confirmed by TEM.

El uso de células Caco-2 para el Estudio de lípidos Transporte por el Intestino

Studies of dietary fat absorption are generally conducted by using an animal model equipped with a lymph cannula. Although this animal model is widely ...

Magnetic-Activated Cell Sorting Strategies to Isolate and Purify Synovial Fluid-Derived Mesenchymal Stem Cells from a Rabbit Model

Mesenchymal stem cells (MSCs) are the main cell source for cell-based therapy. MSCs from articular cavity synovial fluid could potentially be used for cartilage tissue engineering. MSCs from synovial fluid (SF-MSCs) have been considered promising candidates for articular regeneration, and their potential therapeutic benefit has made them an important research topic of late. SF-MSCs from the knee cavity of the New Zealand white rabbit can be employed as an optimized translational model to assess human regenerative medicine. By means of CD90-based magnetic activated cell sorting (MACS) technologies, this protocol successfully obtains rabbit SF-MSCs (rbSF-MSCs) from this rabbit model and further fully demonstrates the MSC phenotype of these cells by inducing them to differentiate to osteoblasts, adipocytes, and chondrocytes. Therefore, this approach can be applied in cell biology research and tissue engineering using simple equipment and procedures.

This article presents a simple and economic protocol for the straightforward isolation and purification of mesenchymal stem cells from New Zealand white rabbit synovial fluid.

Célula activada por el magnético clasificación estrategias para aislar y purificar sinovial líquido mesenquimales células madre derivadas de un modelo de conejo

Mesenchymal stem cells (MSCs) are the main cell source for cell-based therapy. MSCs from articular cavity synovial fluid could potentially be used for ...