Ces études ont été financées en partie par le NIH UO1HL107443-01 prix de GJM et GM.

1. L&#39;isolement et l&#39;expansion des cellules mononucléaires du sang périphérique (PBMC) JOUR 0 <ol><li> Dessin 4 ml de sang périphérique dans un tube BD Vacutainer CPT Préparation des cellules avec du citrate de sodium. Inverser le tube 8 à 10 fois et centrifuger à 1800 xg pendant 30 min à température ambiante. Idéalement, cette étape doit être effectuée dans les 2 heures de la collecte. </li><li> Recueillir les cellules mononucléaires (MC) à la pipette la couche leuco-plaquettaire (couche de cellules entre la barrière de gel et plasma) dans un tube de 15 centrifugation stérile ml conique. Amener le volume total de 10 ml avec stérile saline tamponnée au phosphate (PBS), inverser plusieurs fois et centrifuger à 300 xg pendant 15 min. </li><li> Reprendre les cellules dans 10 ml de PBS stérile et effectuer le nombre de cellules. Transfert 1 à 2x10 6 cellules dans un tube de 15 ml stérile conique à centrifugation et centrifuger à 300 xg pendant 10 min. </li><li> Reprendre les cellules dans 2 ml de milieu d&#39;expansion (EM) (QBSF-60 moyen de cellules souches contenant 50 pg / ml AscoAcide RBIC, 50 ng / ml EFC, 10 ng / ml d&#39;IL-3, 2 U / ml OEB, 40 ng / ml d&#39;IGF-1, 1 uM de dexaméthasone et 100 pg / ml ou 1% primocin Pen / Strep) et transfert à l&#39; un puits d&#39;une plaque 12-puits. Incuber les cellules dans un 37 ° C, 5% CO 2 incubateur. </li><li> Centrifuger les cellules restantes à 300 x g pendant 10 min et gel ~ 2x10 6 cellules / flacon dans FBS contenant 10% de DMSO. </li><li> Pour commencer le protocole en utilisant des PBMC congelés, décongeler 1 flacon de cellules dans 10 ml de milieu QBSF et centrifuger à 300 xg pendant 10 min. Reprendre les cellules dans 2 ml d&#39;EM et de transférer à un puits d&#39;une plaque de 12 puits. Incuber les cellules dans un 37 ° C, 5% CO 2 incubateur. </li></ol> JOUR 3 JOUR 6 et <ol start="17"><li> Transférer les cellules à une stérile 15 ml tube conique et laver le bien une fois avec 1 ml de QBSF-60 moyen de cellules souches pour recueillir des cellules adhérentes. </li><li> Centrifuger les cellules à 300 xg pendant 10 min. </li><li> Reprendre les cellules dans 2 ml d&#39;EM et de transférer à un bien d&#39;un 12Plaque à puits. Incuber les cellules dans un 37 ° C, 5% CO 2 incubateur. </li></ol> 2. Transduction des PBMC par STEMCCA Lentivirus JOUR 9 <ol><li> Transférer les cellules à une stérile 15 ml tube conique et laver le bien une fois avec 1 ml de QBSF-60 moyen de cellules souches pour recueillir des cellules adhérentes. </li><li> Centrifuger les cellules à 300 xg pendant 10 min. </li><li> Reprendre les cellules dans 1 ml de EM frais contenant 5 ug / ml de polybrène et STEMCCA lentivirus (MOI = 1 à 10) et le transfert à un puits d&#39;une plaque de 12 puits. (Le protocole décrivant la production de particules lentivirales peut être trouvé à <a href="http://www.bumc.bu.edu/stemcells/protocols/" target="_blank">http://www.bumc.bu.edu/stemcells/protocols/</a> ) </li><li> Faites tourner la plaque à 2.250 tours par minute à 25 ° C pendant 90 min. </li><li> Après essorage, ajoutez un supplément de 1 ml de EM frais contenant 5 ug / ml de polybrène pour un total de 2 ml de milieu et incuber la plaque à 37 ° C,5% de CO 2 incubateur. </li></ol> JOUR 10 <ol start="16"><li> Transférer les cellules à une stérile 15 ml tube conique et laver le bien une fois avec 1 ml de QBSF-60 moyen de cellules souches pour recueillir des cellules adhérentes. </li><li> Centrifuger les cellules à 300 xg pendant 10 min. </li><li> Reprendre les cellules dans 2 ml de EM et de transférer à 1 puits d&#39;une plaque de 12 puits. Incuber les cellules dans un 37 ° C, 5% CO 2 incubateur. </li></ol> 3. Placage cellules transduites sur les MEF JOUR 11 <ol><li> Enduire les puits d&#39;une plaque à 6 puits avec 0,1% de gélatine et de fibroblastes de souris inactivées plaque embryonnaires (MEF) à 2x10 5 cellules / puits dans du milieu MEF (IMDM contenant 10% de FBS, 1% non-acides aminés essentiels, 100 uM β- mercaptoéthanol, 2 mM de L-glutamine, 100 pg / ml ou 1% primocin Pen / Strep). Préparer 3 puits par l&#39;infection. </li></ol> JOUR 12 <ol start="2"><li> Transférer les cellules à une stérile 15 ml tube conique<html> et lavez-le bien une fois avec 1 ml de QBSF-60 moyen de cellules souches pour recueillir des cellules adhérentes. </li><li> Remettre en suspension les cellules dans 3 ml de milieu contenant MEF 10 ng / ml de bFGF, et l&#39;acide ascorbique et de facteurs de croissance à des concentrations identiques à ceux utilisés dans les EM moyenne (50 Acide ascorbique pg / ml, 50 ng / ml EFC, 10 ng / ml d&#39;IL -3, 2 U / ml OEB, 40 ng / ml d&#39;IGF-1, 1 uM de dexaméthasone). </li><li> Plaque 1 ml de cellules par puits d&#39;une plaque à 6 puits contenant MEF. Ajouter 1,5 ml de bFGF MEF médias, acide ascorbique, et des facteurs de croissance, pour un total de 2,5 ml de milieu / puits. </li><li> Faites tourner la plaque à 500 rpm à 25 ° C pendant 30 min. Incuber la plaque à 37 ° C, 5% de CO 2 incubateur. </li></ol> JOUR 14 <ol start="6"><li> Cellules d&#39;alimentation tous les deux jours avec 2,5 ml de milieu contenant du MEF 10 ng / ml de bFGF et 50 Acide ascorbique pg / ml (pas de facteurs de croissance). Aspirer et jeter les cellules flottantes avec chaque repas. </li><li> Ajouter MEF supplémentaire si nécessaire (généralement une fois par semaine). </li></ol>p &quot;&gt; ~ JOUR 20 <ol start="8"><li> Une fois de petites colonies apparaissent, les cellules d&#39;alimentation quotidienne avec 2 ml de cellules souches embryonnaires humaines (CSEh) moyen (DMEM/F12 remplacement contenant 20% de sérum Knockout, 1% non-acides aminés essentiels, 100 uM β-mercaptoéthanol, 2 mM de L-glutamine , 100 pg / ml ou 1% primocin Pen / Strep et 10 ng / ml de bFGF). </li></ol> 4. La cueillette et l&#39;expansion de clones iPSC ~ JOUR 30 à 40 <ol><li> Choisissez chaque colonie dans les puits individuels d&#39;une plaque de 12 puits pré-ensemencé avec inactivé MEF contenant 1 ml / puits de milieu de CSEh plus 10 uM de Stemolecule Y27632 (ROCK inhibiteur). </li><li> Nourrir les cellules quotidiennement par la suite avec 1 ml de milieu de CSEh uniquement (pas d&#39;inhibiteur de ROCK). </li></ol> 5. La coloration par immunofluorescence pour les marqueurs de pluripotence <ol><li> La coloration a été réalisée en utilisant le kit «Cell ES Exemple de marqueur Kit&quot; de Millipore et suivant le protocole du fabricant. </li></ol> 6. Excision de Integnominale STEMCCA Vecteur <ol><li> Excision de reprogrammation cassette est réalisé en utilisant une transfection Cre-IRES-Puro vecteur exprimant la suite et la sélection puromycine brève comme décrit 6. </li></ol>

<ol>
	<li>Lowry, W. E., Richter, L., Yachechko, R., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Generation+of+human+induced+pluripotent+stem+cells+from+dermal+fibroblasts.">Generation of human induced pluripotent stem cells from dermal fibroblasts.</a> Proc. Natl. Acad. Sci. U.S.A. 105, 2883-2888 (2008).</li><li>Park, I. H., Zhao, R., West, J. A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Reprogramming+of+human+somatic+cells+to+pluripotency+with+defined+factors.">Reprogramming of human somatic cells to pluripotency with defined factors.</a> Nature. 451, 141-146 (2008).</li><li>Takahashi, K., Tanabe, K., Ohnuki, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Induction+of+pluripotent+stem+cells+from+adult+human+fibroblasts+by+defined+factors.">Induction of pluripotent stem cells from adult human fibroblasts by defined factors.</a> Cell. 131, 861-872 (2007).</li><li>Yu, J., Vodyanik, M. A., Smuga-Otto, K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Induced+pluripotent+stem+cell+lines+derived+from+human+somatic+cells.">Induced pluripotent stem cell lines derived from human somatic cells.</a> Science. 318, 1917-1920 (2007).</li><li>Stadtfeld, M., Hochedlinger, K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Induced+pluripotency:+history,+mechanisms,+and+applications.">Induced pluripotency: history, mechanisms, and applications.</a> Genes Dev. 24, 2239-2263 (2010).</li><li>Somers, A., Jean, J. C., Sommer, C. A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Generation+of+transgene-free+lung+disease-specific+human+induced+pluripotent+stem+cells+using+a+single+excisable+lentiviral+stem+cell+cassette.">Generation of transgene-free lung disease-specific human induced pluripotent stem cells using a single excisable lentiviral stem cell cassette.</a> Stem Cells. 28, 1728-1740 (2010).</li><li>Loh, Y. H., Hartung, O., Li, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Reprogramming+of+T+cells+from+human+peripheral+blood.">Reprogramming of T cells from human peripheral blood.</a> Cell Stem Cell. 7, 15-19 (2010).</li><li>Seki, T., Yuasa, S., Oda, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Generation+of+induced+pluripotent+stem+cells+from+human+terminally+differentiated+circulating+T+cells.">Generation of induced pluripotent stem cells from human terminally differentiated circulating T cells.</a> Cell Stem Cell. 7, 11-14 (2010).</li><li>Staerk, J., Dawlaty, M. M., Gao, Q., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Reprogramming+of+human+peripheral+blood+cells+to+induced+pluripotent+stem+cells.">Reprogramming of human peripheral blood cells to induced pluripotent stem cells.</a> Cell Stem Cell. 7, 20-24 (2010).</li><li>Chou, B. K., Mali, P., Huang, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Efficient+human+iPS+cell+derivation+by+a+non-integrating+plasmid+from+blood+cells+with+unique+epigenetic+and+gene+expression+signatures.">Efficient human iPS cell derivation by a non-integrating plasmid from blood cells with unique epigenetic and gene expression signatures.</a> Cell Res. 21, 518-529 (2011).</li><li>vanden Akker, E., Satchwell, T. J., Pellegrin, S., Daniels, G., Toye, A. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+majority+of+the+in+vitro+erythroid+expansion+potential+resides+in+CD34(-)+cells,+outweighing+the+contribution+of+CD34(+)+cells+and+significantly+increasing+the+erythroblast+yield+from+peripheral+blood+samples.">The majority of the in vitro erythroid expansion potential resides in CD34(-) cells, outweighing the contribution of CD34(+) cells and significantly increasing the erythroblast yield from peripheral blood samples.</a> Haematologica. 95, 1594-1598 (2010).</li></ol>

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Nous décrivons ici l&#39;utilisation du vecteur lentiviral STEMCCA de générer iPSCs humains à partir de cellules mononucléées isolées de quelques millilitres de sang périphérique fraîchement prélevé. Le protocole peut également être utilisé pour reprogrammer PBMC congelés (obtenu directement à partir de la couche leuco-plaquettaire), un détail d&#39;importantes implications pratiques lors de l&#39;utilisation des cellules du donneur acquises à partir d&#39;un emplacement distant. Avant l&#39;induction...

<table border="1"><tbody><tr><td> Nom du réactif </td><td> Entreprise </td><td> Numéro de catalogue </td><td> Commentaires (optionnel) </td></tr><tr><td> BD Vacutainer CPT Tube Préparation des cellules avec du citrate de sodium </td><td> BD Biosciences </td><td> 362760 </td><td></td></tr><tr><td> QBSF-60 moyen de cellules souches </td><td> Qualité biologique </td><td> 160-204-101 </td><td></td></tr><tr><td> IMDM </td><td> Invitrogen </td><td> 12440 </td><td></td></tr><tr><td> DMEM/F12 </td><td> Invitrogen </td><td> 11330 </td><td></td></tr><tr><td> FBS </td><td> Atlanta Biologicals </td><td> S10250 </td><td></td></tr><tr><td> Remplacement Knockout Sérum </td><td> Invitrogen </td><td> 10828 </td><td></td></tr><tr><td> Primocin </td><td> Invivogen </td><td> ant-h-2 </td><td></td></tr><tr><td> Pen / Strep </td><td> Invitrogen </td><td> 15140 </td><td></td></tr><tr><td> L-Glutamine </td><td> Invitrogen </td><td> 25030 </td><td></td></tr><tr><td> Non-acides aminés essentiels </td><td> Invitrogen </td><td> 11140 </td><td></td></tr><tr><td> β-mercaptoéthanol </td><td> MP Biomédical </td><td> 190242 </td><td></td></tr><tr><td> Acide ascorbique </td><td> Sigma </td><td> A4544 </td><td></td></tr><tr><td> IGF-1 </td><td> R &amp; D Systems </td><td> 291-G1 </td><td></td></tr><tr><td> IL-3 </td><td> R &amp; D Systems </td><td> 203-IL </td><td></td></tr><tr><td> EFC </td><td> R &amp; D Systems </td><td> 255-SC </td><td></td></tr><tr><td> OEB </td><td> R &amp; D Systems </td><td> 286-EP </td><td></td></tr><tr><td> Dexaméthasone </td><td> Sigma </td><td> D4902 </td><td></td></tr><tr><td> Polybrène </td><td> Sigma </td><td> H-9268 </td><td></td></tr><tr><td> bFGF </td><td> R &amp; D Systems </td><td> 233-FB </td><td></td></tr><tr><td> Stemolecule Y27632 </td><td> Stemgent </td><td> 04-0012 </td><td></td></tr><tr><td> Cellule ES Sample Kit Marker </td><td> Millipore </td><td> SCR002 </td><td></td></tr></tbody></table>

generation of human induced pluripotent stem cells from peripheral blood using the stemcca lentiviral vector

Grâce à l&#39;expression ectopique de quatre facteurs de transcription, Oct4, Klf4, Sox2 et cMyc, des cellules somatiques humaines peuvent être convertis en un état ​​pluripotent, générant des dites cellules souches pluripotentes induites (CISP) 1-4. Spécifiques au patient iPSCs n&#39;ont pas les préoccupations éthiques qui entourent les cellules souches embryonnaires (CSE) et permettrait de contourner possible rejet immunitaire. Ainsi, iPSCs ont attiré une attention considérable pour les études de modélisation des maladies, le dépistage de composés pharmacologiques et les thérapies régénératives 5. Nous avons montré la génération de transgène sans iPSCs humains de patients atteints de maladies pulmonaires différents en utilisant un seul soumis à l&#39;accise polycistronique lentiviral cassette de cellules souches (STEMCCA) codant pour les facteurs de Yamanaka 6. Ces lignes iPSC ont été générés par des fibroblastes de peau, le type cellulaire le plus couramment utilisé pour la reprogrammation. Normalement, l&#39;obtention de fibroblastes nécessite une biopsie cutanée suivie d&#39;une expansion de la cellules dans la culture de quelques passages. Surtout, un certain nombre de groupes ont rapporté la reprogrammation des cellules du sang périphérique en iPSCs 7-9. Dans une étude, une version inductible Tet du vecteur a été utilisé STEMCCA 9, qui exigeait que les globules d&#39;être infectés simultanément par un lentivirus codant pour la forme constitutivement active inverse tétracycline transactivateur. En revanche pour les fibroblastes, les cellules sanguines périphériques peuvent être collectées via des procédures minimalement invasives, ce qui réduit considérablement l&#39;inconfort et la détresse du patient. Un protocole simple et efficace pour la reprogrammation des cellules sanguines utilisant un vecteur unique constitutive soumis à l&#39;accise peuvent accélérer l&#39;application des technologies de l&#39;iPSC en la rendant accessible à une communauté plus large de la recherche. En outre, une reprogrammation de cellules du sang périphérique permet de générer des iPSCs de personnes dans laquelle des biopsies de peau doit être évité (par exemple. Aberrante cicatrices) ou en raison de pathologies préexistantes preventiaccès ng de biopsies. Ici nous démontrons un protocole pour la génération de iPSCs l&#39;homme à partir de cellules mononucléées du sang périphérique (PBMC) en utilisant une seule floxé-soumis à l&#39;accise vecteur lentiviral exprimant de manière constitutive les 4 facteurs. PBMC fraîchement récoltées ou décongelés sont développées pendant 9 jours, comme décrit dans l&#39;acide ascorbique 10,11 milieu contenant, SCF, IGF-1, IL-3 et de l&#39;EPO avant d&#39;être transduites avec le lentivirus STEMCCA. Les cellules sont ensuite étalées sur des MEF et de l&#39;ESC-comme les colonies peuvent être visualisés de deux semaines après l&#39;infection. Enfin, les clones sélectionnés sont développés et testés pour l&#39;expression des marqueurs de la pluripotence SSEA-4, Tra-1-60 et Tra-1-81. Ce protocole est simple, robuste et très logique, en fournissant une méthodologie fiable pour la génération de l&#39;homme iPSCs facilement accessible à partir de 4 ml de sang.

Nous démontrons un protocole simple et efficace pour la génération de l&#39;homme iPSCs de PBMC en utilisant un vecteur lentiviral unique. Figure 1A montre une représentation schématique du protocole. Le sang est recueilli dans des tubes BD Vacutainer CPT Préparation des cellules avec du citrate de sodium, et, après centrifugation, les cellules mononucléaires peuvent être collectées à partir de l&#39;interface entre le gel de polyester et le plasma (buffy coat) (figure 1B). L...

Watch this Scientific Journal Video about Generation of Human Induced Pluripotent Stem Cells from Peripheral Blood Using the STEMCCA Lentiviral Vector at JoVE.com

Generation of Human Induced Pluripotent Stem Cells from Peripheral Blood Using the STEMCCA Lentiviral Vector

Ici, nous montrons un protocole simple et efficace pour la génération de l&#39;homme iPSCs de 3-4 ml de sang périphérique en utilisant un vecteur lentiviral unique reprogrammation. La reprogrammation des cellules sanguines facilement disponibles promet d&#39;accélérer l&#39;utilisation des technologies de l&#39;iPSC en la rendant accessible à une communauté plus large de la recherche.

Génération de l&#39;homme cellules souches pluripotentes induites à partir de sang périphérique en utilisant le vecteur lentiviral STEMCCA

Through the ectopic expression of four transcription factors, Oct4, Klf4, Sox2 and cMyc, human somatic cells can be converted to a pluripotent state, ...

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26.4K vues.  Boston University School of Medicine. Ici, nous montrons un protocole simple et efficace pour la génération de l'homme iPSCs de 3-4 ml de sang périphérique en utilisant un vecteur lentiviral unique reprogrammation. La reprogrammation des cellules sanguines facilement disponibles promet d'accélérer l'utilisation des technologies de l'iPSC en la rendant accessible à une communauté plus large de la recherche.

Vidéo: Generation of Human Induced Pluripotent Stem Cells from Peripheral Blood Using the STEMCCA Lentiviral Vector

Generation of Induced Pluripotent Stem Cells by Reprogramming Mouse Embryonic Fibroblasts with a Four Transcription Factor, Doxycycline Inducible Lentiviral Transduction System

Using a defined set of transcription factors and cell culture conditions, Yamanaka and colleagues demonstrated that retrovirus-mediated delivery and expression of Oct4, Sox2, c-Myc, and Klf4 is capable of inducing pluripotency in mouse fibroblasts.1 Subsequent reports have demonstrated the utility of the doxycycline (DOX) inducible lentiviral delivery system for the generation of both primary and secondary iPS cells from a variety of other adult mouse somatic cell types.2,3
Induced pluripotent stem (iPS) cells are similar to embryonic stem (ES) cells in morphology, proliferation and ability to induce teratoma formation. Both types of cell can be used as the pluripotent starting material for the generation of differentiated cells or tissues in regenerative medicine.4-6 iPS cells also have a distinct advantage over ES cells as they exhibit key properties of ES cells without the ethical dilemma of embryo destruction.
Here we demonstrate the protocol for reprogramming mouse embryonic fibroblast (MEF) cells with the Stemgent DOX Inducible Mouse TF Lentivirus Set. We also demonstrate that the Stemgent DOX Inducible Mouse TF Lentivirus Set is capable of expressing each of the four transcription factors upon transduction into MEFs thereby inducing a pluripotent stem cell state that displays the pluripotency markers characteristic of ES cells.

The Stemgent Dox Inducible Mouse TF Lentivirus Set can reprogram mouse embryonic fibroblasts (MEFs) to induced pluripotent stem (iPS) cells. Here we demonstrate the protocol for DOX-inducible expression of mouse reprogramming transcription factors Oct4, Sox2, Klf4 and c-Myc to generate iPS colonies that express common mES pluripotency markers.

Génération de cellules souches pluripotentes induites par la reprogrammation des fibroblastes embryonnaires de souris avec un facteur de transcription Quatre, doxycycline inductible système de transduction lentiviraux

Using a defined set of transcription factors and cell culture conditions, Yamanaka and colleagues demonstrated that retrovirus-mediated delivery and ...

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Biologie

Generation of Induced Pluripotent Stem Cells by Reprogramming Human Fibroblasts with the Stemgent Human TF Lentivirus Set

In 2006, Yamanaka and colleagues first demonstrated that retrovirus-mediated delivery and expression of Oct4, Sox2, c-Myc and Klf4 is capable of inducing the pluripotent state in mouse fibroblasts.1 The same group also reported the successful reprogramming of human somatic cells into induced pluripotent stem (iPS) cells using human versions of the same transcription factors delivered by retroviral vectors.2 Additionally, James Thomson et al. reported that the lentivirus-mediated co-expression of another set of factors (Oct4, Sox2, Nanog and Lin28) was capable of reprogramming human somatic cells into iPS cells.3
iPS cells are similar to ES cells in morphology, proliferation and the ability to differentiate into all tissue types of the body. Human iPS cells have a distinct advantage over ES cells as they exhibit key properties of ES cells without the ethical dilemma of embryo destruction. The generation of patient-specific iPS cells circumvents an important roadblock to personalized regenerative medicine therapies by eliminating the potential for immune rejection of non-autologous transplanted cells.
Here we demonstrate the protocol for reprogramming human fibroblast cells using the Stemgent Human TF Lentivirus Set. We also show that cells reprogrammed with this set begin to show iPS morphology four days post-transduction. Using the Stemolecule Y27632, we selected for iPS cells and observed correct morphology after three sequential rounds of colony picking and passaging. We also demonstrate that after reprogramming cells displayed the pluripotency marker AP, surface markers TRA-1-81, TRA-1-60, SSEA-4, and SSEA-3, and nuclear markers Oct4, Sox2 and Nanog.

We demonstrate the protocol for the generation of induced pluripotent stem cells from human somatic cells using lentivirus-mediated delivery of the human factors Oct4, Sox2, Nanog, and Lin28. Pluripotency was confirmed by morphology and the presence of embryonic stem (ES) cell-specific markers.

Génération de cellules souches pluripotentes induites par la reprogrammation des fibroblastes humains avec les lentivirus TF Stemgent Homme Set

In 2006, Yamanaka and colleagues first demonstrated that retrovirus-mediated delivery and expression of Oct4, Sox2, c-Myc and Klf4 is capable of inducing ...

Transfecting and Nucleofecting Human Induced Pluripotent Stem Cells

Genetic modification is continuing to be an essential tool in studying stem cell biology and in setting forth potential clinical applications of human embryonic stem cells (HESCs)1. While improvements in several gene delivery methods have been described2-9, transfection remains a capricious process for HESCs, and has not yet been reported in human induced pluripotent stem cells (iPSCs). In this video, we demonstrate how our lab routinely transfects and nucleofects human iPSCs using plasmid with an enhanced green fluorescence protein (eGFP) reporter. Human iPSCs are adapted and maintained as feeder-free cultures to eliminate the possibility of feeder cell transfection and to allow efficient selection of stable transgenic iPSC clones following transfection. For nucleofection, human iPSCs are pre-treated with ROCK inhibitor11, trypsinized into small clumps of cells, nucleofected and replated on feeders in feeder cell-conditioned medium to enhance cell recovery. Transgene-expressing human iPSCs can be obtained after 6 hours. Antibiotic selection is applied after 24 hours and stable transgenic lines appear within 1 week. Our protocol is robust and reproducible for human iPSC lines without altering pluripotency of these cells.

Despite recent advancements in genetic modification, transfection of human embryonic stem cells (HESCs) remains a capricious process. To our knowledge, systematic and efficient methods to transfect human induced pluripotent stem cells (iPSCs) have not been reported. Here, we describe robust protocols to efficiently transfect and nucleofect human iPSCs.

Transfection et Nucleofecting homme cellules souches pluripotentes induites

Genetic modification is continuing to be an essential tool in studying stem cell biology and in setting forth potential clinical applications of human ...

Selecting and Isolating Colonies of Human Induced Pluripotent Stem Cells Reprogrammed from Adult Fibroblasts

Herein we present a protocol of reprogramming human adult fibroblasts into human induced pluripotent stem cells (hiPSC) using retroviral vectors encoding Oct3/4, Sox2, Klf4 and c-myc (OSKM) in the presence of sodium butyrate 1-3. We used this method to reprogram late passage (&gt;p10) human adult fibroblasts derived from Friedreich's ataxia patient (GM03665, Coriell Repository). The reprogramming approach includes highly efficient transduction protocol using repetitive centrifugation of fibroblasts in the presence of virus-containing media. The reprogrammed hiPSC colonies were identified using live immunostaining for Tra-1-81, a surface marker of pluripotent cells, separated from non-reprogrammed fibroblasts and manually passaged 4,5. These hiPSC were then transferred to Matrigel plates and grown in feeder-free conditions, directly from the reprogramming plate. Starting from the first passage, hiPSC colonies demonstrate characteristic hES-like morphology. Using this protocol more than 70% of selected colonies can be successfully expanded and established into cell lines. The established hiPSC lines displayed characteristic pluripotency markers including surface markers TRA-1-60 and SSEA-4, as well as nuclear markers Oct3/4, Sox2 and Nanog. 
The protocol presented here has been established and tested using adult fibroblasts obtained from Friedreich's ataxia patients and control individuals 6, human newborn fibroblasts, as well as human keratinocytes.

We present a protocol for efficient reprogramming of human somatic cells into human induced pluripotent stem cells (hiPSC) using retroviral vectors encoding Oct3/4, Sox2, Klf4 and c-myc (OSKM) and identification of correctly reprogrammed hiPSC by live staining with Tra-1-81 antibody.

Colonies sélectionner et isoler de l&#39;homme cellules souches pluripotentes induites à partir de fibroblastes adultes Reprogrammed

Herein we present a protocol of reprogramming human adult fibroblasts into human induced pluripotent stem cells (hiPSC) using retroviral vectors encoding ...

Reprogramming Human Somatic Cells into Induced Pluripotent Stem Cells (iPSCs) Using Retroviral Vector with GFP

Human embryonic stem cells (hESCs) are pluripotent and an invaluable cellular sources for in vitro disease modeling and regenerative medicine1. It has been previously shown that human somatic cells can be reprogrammed to pluripotency by ectopic expression of four transcription factors (Oct4, Sox2, Klf4 and Myc) and become induced pluripotent stem cells (iPSCs)2-4 . Like hESCs, human iPSCs are pluripotent and a potential source for autologous cells. Here we describe the protocol to reprogram human fibroblast cells with the four reprogramming factors cloned into GFP-containing retroviral backbone4. Using the following protocol, we generate human iPSCs in 3-4 weeks under human ESC culture condition. Human iPSC colonies closely resemble hESCs in morphology and display the loss of GFP fluorescence as a result of retroviral transgene silencing. iPSC colonies isolated mechanically under a fluorescence microscope behave in a similar fashion as hESCs. In these cells, we detect the expression of multiple pluripotency genes and surface markers.

Reprogramming Human Somatic Cells into Induced Pluripotent Stem Cells iPSCs Using Retroviral Vector with GFP

A method to generate human induced pluripotent stem cells (iPSCs) via retrovirus-mediated ectopic expression of OCT4, SOX2, KLF4 and MYC is described. A practical way to identify human iPSC colonies based on GFP expression is also discussed.

Reprogrammation des cellules somatiques humaines dans cellules souches pluripotentes induites (CISP) Utilisation vecteur rétroviral avec la GFP

Human embryonic stem cells (hESCs) are pluripotent and an invaluable cellular sources for in vitro disease modeling and regenerative medicine1. It has ...

Generation of Mice Derived from Induced Pluripotent Stem Cells

The production of induced pluripotent stem cells (iPSCs) from somatic cells provides a means to create valuable tools for basic research and may also produce a source of patient-matched cells for regenerative therapies. iPSCs may be generated using multiple protocols and derived from multiple cell sources. Once generated, iPSCs are tested using a variety of assays including immunostaining for pluripotency markers, generation of three germ layers in embryoid bodies and teratomas, comparisons of gene expression with embryonic stem cells (ESCs) and production of chimeric mice with or without germline contribution2. Importantly, iPSC lines that pass these tests still vary in their capacity to produce different differentiated cell types2. This has made it difficult to establish which iPSC derivation protocols, donor cell sources or selection methods are most useful for different applications.
The most stringent test of whether a stem cell line has sufficient developmental potential to generate all tissues required for survival of an organism (termed full pluripotency) is tetraploid embryo complementation (TEC)3-5. Technically, TEC involves electrofusion of two-cell embryos to generate tetraploid (4n) one-cell embryos that can be cultured in vitro to the blastocyst stage6. Diploid (2n) pluripotent stem cells (e.g. ESCs or iPSCs) are then injected into the blastocoel cavity of the tetraploid blastocyst and transferred to a recipient female for gestation (see Figure 1). The tetraploid component of the complemented embryo contributes almost exclusively to the extraembryonic tissues (placenta, yolk sac), whereas the diploid cells constitute the embryo proper, resulting in a fetus derived entirely from the injected stem cell line.
Recently, we reported the derivation of iPSC lines that reproducibly generate adult mice via TEC1. These iPSC lines give rise to viable pups with efficiencies of 5-13%, which is comparable to ESCs3,4,7 and higher than that reported for most other iPSC lines8-12. These reports show that direct reprogramming can produce fully pluripotent iPSCs that match ESCs in their developmental potential and efficiency of generating pups in TEC tests. At present, it is not clear what distinguishes between fully pluripotent iPSCs and less potent lines13-15. Nor is it clear which reprogramming methods will produce these lines with the highest efficiency. Here we describe one method that produces fully pluripotent iPSCs and "all- iPSC" mice, which may be helpful for investigators wishing to compare the pluripotency of iPSC lines or establish the equivalence of different reprogramming methods.

Generating induced pluripotent stem cell (iPSC) lines produces lines of differing developmental potential even when they pass standard tests for pluripotency. Here we describe a protocol to produce mice derived entirely from iPSCs, which defines the iPSC lines as possessing full pluripotency1.

Génération de souris dérivées de cellules souches pluripotentes induites

The production of induced pluripotent stem cells (iPSCs) from somatic cells provides a means to create valuable tools for basic research and may also ...

Rapid and Efficient Generation of Neurons from Human Pluripotent Stem Cells in a Multititre Plate Format

Existing protocols for the generation of neurons from human pluripotent stem cells (hPSCs) are often tedious in that they are multistep procedures involving the isolation and expansion of neural precursor cells, prior to terminal differentiation. In comparison to these time-consuming approaches, we have recently found that combined inhibition of three signaling pathways, TGF&beta;/SMAD2, BMP/SMAD1, and FGF/ERK, promotes rapid induction of neuroectoderm from hPSCs, followed by immediate differentiation into functional neurons. Here, we have adapted our procedure to a novel multititre plate format, to further enhance its reproducibility and to make it compatible with mid-throughput applications. It comprises four days of neuroectoderm formation in floating spheres (embryoid bodies), followed by a further four days of differentiation into neurons under adherent conditions. Most cells obtained with this protocol appear to be bipolar sensory neurons. Moreover, the procedure is highly efficient, does not require particular expert skills, and is based on a simple chemically defined medium with cost-efficient small molecules. Due to these features, the procedure may serve as a useful platform for further functional investigation as well as for cell-based screening approaches requiring human sensory neurons or neurons of any type.

Protocols for neuronal differentiation of pluripotent human stem cells (hPSCs) are often time-consuming and require substantial cell culture skills. Here, we have adapted a small molecule-based differentiation procedure to a multititre plate format, allowing simple, rapid, and efficient generation of human neurons in a controlled manner.

Génération rapide et efficace des neurones à partir de cellules souches pluripotentes humaines dans un format plaque Multititre

Existing protocols for the generation of neurons from human pluripotent stem cells (hPSCs) are often tedious in that they are  multistep procedures ...

Generation of Human Cardiomyocytes: A Differentiation Protocol from Feeder-free Human Induced Pluripotent Stem Cells

In order to investigate the events driving heart development and to determine the molecular mechanisms leading to myocardial diseases in humans, it is essential first to generate functional human cardiomyocytes (CMs). The use of these cells in drug discovery and toxicology studies would also be highly beneficial, allowing new pharmacological molecules for the treatment of cardiac disorders to be validated pre-clinically on cells of human origin. Of the possible sources of CMs, induced pluripotent stem (iPS) cells are among the most promising, as they can be derived directly from readily accessible patient tissue and possess an intrinsic capacity to give rise to all cell types of the body 1. Several methods have been proposed for differentiating iPS cells into CMs, ranging from the classical embryoid bodies (EBs) aggregation approach to chemically defined protocols 2,3. In this article we propose an EBs-based protocol and show how this method can be employed to efficiently generate functional CM-like cells from feeder-free iPS cells.

Pluripotent stem cells, either embryonic or induced pluripotent stem (iPS) cells, constitute a valuable source of human differentiated cells, including cardiomyocytes. Here, we will focus on cardiac induction of iPS cells, showing how to use them to obtain functional human cardiomyocytes through an embryoid bodies-based protocol.

Génération de cardiomyocytes humains: Un protocole de différenciation des induits des cellules souches pluripotentes humaines chargeur sans

In order to investigate the events driving heart development and to determine the molecular mechanisms leading to myocardial diseases in humans, it is ...

Efficient Generation Human Induced Pluripotent Stem Cells from Human Somatic Cells with Sendai-virus

A few years ago, the establishment of human induced pluripotent stem cells (iPSCs) ushered in a new era in biomedicine. Potential uses of human iPSCs include modeling pathogenesis of human genetic diseases, autologous cell therapy after gene correction, and personalized drug screening by providing a source of patient-specific and symptom relevant cells. However, there are several hurdles to overcome, such as eliminating the remaining reprogramming factor transgene expression after human iPSCs production. More importantly, residual transgene expression in undifferentiated human iPSCs could hamper proper differentiations and misguide the interpretation of disease-relevant in vitro phenotypes. With this reason, integration-free and/or transgene-free human iPSCs have been developed using several methods, such as adenovirus, the piggyBac system, minicircle vector, episomal vectors, direct protein delivery and synthesized mRNA. However, efficiency of reprogramming using integration-free methods is quite low in most cases.
Here, we present a method to isolate human iPSCs by using Sendai-virus (RNA virus) based reprogramming system. This reprogramming method shows consistent results and high efficiency in cost-effective manner.

Here, we present our established method to reprogram human somatic cells into transgene-free human iPSCs with Sendai virus, which shows consistent outcome and enhanced efficiency.

Génération efficace d&#39;origine humaine souches pluripotentes à partir de cellules somatiques humaines avec Sendai-virus

A few years ago, the establishment of human induced pluripotent stem cells (iPSCs) ushered in a new era in biomedicine. Potential uses of human iPSCs ...

Generation and Culture of Blood Outgrowth Endothelial Cells from Human Peripheral Blood

Historically, the limited availability of primary endothelial cells from patients with vascular disorders has hindered the study of the molecular mechanisms underlying endothelial dysfunction in these individuals. However, the recent identification of blood outgrowth endothelial cells (BOECs), generated from circulating endothelial progenitors in adult peripheral blood, may circumvent this limitation by offering an endothelial-like, primary cell surrogate for patient-derived endothelial cells. Beyond their value to understanding endothelial biology and disease modeling, BOECs have potential uses in endothelial cell transplantation therapies. They are also a suitable cellular substrate for the generation of induced pluripotent stem cells (iPSCs) via nuclear reprogramming, offering a number of advantages over other cell types. We describe a method for the reliable generation, culture and characterization of BOECs from adult peripheral blood for use in these and other applications. This approach (i) allows for the generation of patient-specific endothelial cells from a relatively small volume of adult peripheral blood and (ii) produces cells that are highly similar to primary endothelial cells in morphology, cell signaling and gene expression.

This protocol allows for the reliable generation and characterization of blood outgrowth endothelial cells (BOECs) from a small volume of adult peripheral blood. BOECs can be used as a surrogate for endothelial cells from patients with vascular disorders and as a substrate for the generation of induced pluripotent stem cells.