Embrionali umane studi sulle cellule staminali in laboratorio Teitell sono supportati da una California Institute for Regenerative Medicine (CIRM) sementi concedere RS1-00313. Ringraziamo i membri del Centro di Medicina Rigenerativa Broad e ricerca sulle cellule staminali presso la UCLA, in particolare il Dott. Amander Clark, il Dr. Jerome Zack, e membri del Fondo per la UCLA Stem Cell Institute Broad core per il loro sostegno dei nostri studi.

hESC manutenzione cultura quotidiana <ol><li> terreni di coltura hESC deve essere cambiato ogni 24 ore. Dalla bottiglia ES magazzino multimediali memorizzati a 4 ° C, estrarre la quantità di soluzione necessaria (~ 20ml per 6 pozzetti), posto in un tubo da 50 ml falco, e calda a 37 ° C in un bagno d&#39;acqua. Una volta che la media è riscaldato, aggiungere bFGF conservato a 4 ° C ad una concentrazione finale di 10ng/ml. Mettete il brodo bFGF torna a 4 ° C subito dopo l&#39;uso! </li><li> Togliere dal 6 pozzetti tutti ma ~ 500μl dei media. Assicurati di agitare il piatto cultura di sospendere i detriti per la rimozione. Assicurarsi che il bFGF in terreni di coltura del hESC sia ben mescolata e aggiungere 3 ml di mezzi freschi di nuovo in ogni pozzetto di un 6-pozzetti. Rimettere la piastra nell&#39;incubatrice. </li></ol> HESC scissione dal MEF sul Matrigel Di solito un confluenti 6 pozzetti di hESC sul MEF possono essere divisi 1:02-1:03 su Matrigel piatti 6-bene, con i pozzi di diventare confluenti ancora 4-5 giorni dopo la divisione. <ol><li> Quando hESC suddivisione su Matrigel, MEF condizionata media (CM) è usato per mantenere la pluripotenza. MEF condizionata media è in anticipo. Il primo giorno, 1,5 × 10 7 γ-irradiati MEF sono seminati in un pallone T75. Il secondo giorno, MEF vengono lavati una volta con temperatura ambiente 1 × PBS, pH 7,4, e poi 15 ml di media ES integrato con 5ng/ml bFGF si aggiunge al pallone. (NOTA: MEF può essere placcato in fiasche più piccole o più grandi, ma proporzione tra la densità delle cellule e il volume dei mezzi di comunicazione ES deve essere costante.) Il pallone viene incubata a 37 ° C per altre 24 ore. Il terzo giorno, il CM è raccolto e sostituito con 15 ml di media ES fresca integrato con 5ng/ml bFGF. Il CM raccolto viene conservato a 4 ° C. MEF condizionata da una placcatura mezzi di MEF sono raccolte più di sette giorni consecutivi di generare 15 × 7 = 105ml. Dopo sette giorni, tutte le frazioni CM sono combinati, sterile filtrata, aliquotati e conservati a -20 ° C. Mezzi di comunicazione CM preparato come descritto possono essere memorizzati e utilizzati per 1 mese. </li><li> Un giorno prima divisione hESC, messo aliquote Matrigel in tubi eppendorf a 4 ° C per scongelare tutta la notte (una aliquota contiene 76.2mg di Matrigel, e questo è l&#39;importo necessario per un 6-pozzetti). Il giorno della scissione, prendere un flaconcino di Matrigel scongelati per un 6-pozzetti, mettere il flaconcino e 6 ml di freddo DMEM/F12 multimediale su ghiaccio. Trasferire il Matrigel nel DMEM/F12 media e mescolare bene. Aggiungere 1 ml della soluzione in ogni pozzetto di un 6-pozzetti. Agitare la piastra per distribuire Matrigel sulla superficie e incubare il Matrigel coperto di piastra a temperatura ambiente per almeno 1 ora prima di dividere la hESC. </li><li> hESC il MEF sono lavati una volta con 1 × PBS, pH 7,4. Successivamente 1 ml di caldo collagenasi IV (1mg/ml) viene aggiunto in ciascun pozzetto della piastra ben 6 e poi la piastra viene incubata a 37 ° C per 5-10 min. </li><li> Aggiungere 1ml di media ES senza bFGF in ciascun pozzetto. Utilizzare una pipetta 1 ml di far saltare le cellule staminali fuori dal piatto. Raccogliere tutti i supporti contenenti grumi di hESC e morti MEF in una provetta da 50 ml falco. Lasciate grumi di cellule grandi accontentarsi di 5-10 minuti in modo che le macchie hESC forma una pallina sul fondo della provetta mentre il MEF rimangono sospese nel supernatante. Eliminare il supernatante e lavare da risospendere il pellet mezzi hESC ES manca bFGF, seguita da centrifugazione a temperatura ambiente a 200 g per 5 min. </li><li> Alla piastra le cellule staminali su piastre Matrigel, prima lavare i piatti Matrigel con temperatura ambiente DMEM/F12 (1 ml per pozzetto) e l&#39;aggiunta di 2,5 ml di CM integrata con 10ng/ml bFGF per bene. Risospendere il pellet in un volume adeguato di CM integrata con 10ng/ml bFGF, pipetta la sospensione cellulare su e giù parecchie volte fino a quando le macchie diventano uniformi e di piccole dimensioni. Aliquota la sospensione a 0,5 ml per pozzetto sul piatto Matrigel. Si noti che la densità colonia su Matrigel è superiore alla densità delle colonie dividendo consueto MEF. Posizionare la piastra a 37 ° C di coltura tissutale incubatore. </li><li> Per mantenere la hESC su Matrigel, media CM integrato con 10ng/ml bFGF è cambiato ogni 24 ore per un massimo di 4-5 giorni. </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>

Questo video mostra come hESC passaggio da piastre MEF per alimentatore cell-free piastre Matrigel. Si noti che la densità colonia su Matrigel è superiore alla densità delle colonie dividendo consueto MEF. Immunofluorescenza e la citometria a flusso o microscopia per i marcatori hESC pluripotenza, come Oct-4 e SSE-4, sono necessari per confermare la manutenzione di hESC in uno stato indifferenziato di alimentazione priva di condizioni di coltura.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">	
		
		<div>
		<table border="1">
		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
		<tbody>
		
<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>
<tr>
<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>
			<div>
					</div>

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

Questo video dimostra come far crescere cellule staminali embrionali umane (hESC) su fibroblasti embrionali di topo (MEF), le cellule di alimentazione, come hESC passaggio da piastre MEF per alimentatore cell-free piastre 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

Questo video dimostra come mantenere la crescita delle cellule staminali embrionali umane (hESC) in cellule di alimentazione priva di condizioni e modalità di continuo passaggio in hESC alimentatore cellulare senza condizioni. Conferma di hESC pluripotenza delle cellule coltivate in alimentatore senza condizioni al microscopio immunofluorescenza è anche dimostrata. Parte 2 di 3.

Dal MEF per Matrigel 2: hESC scissione dal MEF sul 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 Views.  University of California, Los Angeles. Questo video dimostra come mantenere la crescita delle cellule staminali embrionali umane (hESC) in cellule di alimentazione priva di condizioni e modalità di continuo passaggio in hESC alimentatore cellulare senza condizioni. Conferma di hESC pluripotenza delle cellule coltivate in alimentatore senza condizioni al microscopio immunofluorescenza è anche dimostrata. Parte 2 di 3.

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.

Dal MEF per Matrigel I: hESC Passaging in presenza di MEF

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

Ricerca

Biologia

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.

Generare cellule iPS dal MEF attraverso l&#39;espressione forzata di Sox-2, Oct-4, c-Myc e 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.

Dal MEF per Matrigel 3: hESC Passaging da Matrigel su 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.

Caricamento di merci su Kinesin Navette Powered molecolare

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.

Introduzione al Laboratorio Worm: da Worms coltura a mutagenesi

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.

Un Matrigel-Based Formazione Assay tubo per valutare l&#39;attività vascolare delle cellule tumorali

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.

Generazione di Myospheres Da hESCs di epigenetica Riprogrammazione

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 come un modello per individuare Traduzione Impairment

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.

Utilizzando cellule Caco-2 allo Studio Lipid Trasporto dall&#39;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.

Magnetico-Activated Cell Sorting strategie per isolare e purificare Synovial cellule staminali mesenchimali liquido derivato da un modello di coniglio

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

Methods Article

Dal MEF per Matrigel 2: hESC scissione dal MEF sul Matrigel