Not: steril kültür koşullarını korumak için, bu protokol tüm prosedürlerin steril laboratuar uygulamaları kullanılarak gerçekleştirilen ve laminer akış kaputu altında yürütülmelidir. Başlamadan önce, herhangi bir ortam, 37 dengelenmiş olduğundan emin ° C ve uygun gazladı. Geltrex kaplı Kültür Yemekleri hazırlanması Not: CELLstart kaplı kültür kaplarına kullanmak için eke bakınız. <ol><li> Çözülme Geltrex yavaş yavaş 2-8 (1 mL) ° C tüp ve Knockout D-MEM/F-12 99 ml 1:100 onu sulandırmak. Çözüm hafifçe karıştırın. Not: Bazı iPS hücre hatları, optimum büyüme için farklı bir Geltrex seyreltme gerekebilir. Alternatif dilüsyonları için eke bakınız. </li><li> Her kültürün çanak tüm yüzeyi Geltrex çözüm (35 mm yemek için 1 ml, 60 mm yemek için 1.5 ml) ile kaplayın. </li><li> Kurumasını önlemek ve 37 yemekleri az 1 saat inkübe Parafilm ° C ile her tabak sızıntısını önleyiniz Not: Bu noktada, 1 aya kadar 4 ° C&#39;de Geltrex kaplı kültür kaplarına saklayabilir. Geltrex kurumasını önlemek için her tabak Parafilm Seal. </li><li> Kullanmadan önce, bir laminer akış kaputu Geltrex kaplı yemekler aktarmak ve onları oda sıcaklığında (yaklaşık 1 saat) gelmesini sağlar. </li></ol> Komple nakavt SR Besleyici Ücretsiz Orta hazırlanması <ol><li> 10 mcg / ml Temel FGF çözüm, 1 ml hazırlamak için, aseptik aşağıda listelenen bileşenleri karıştırın. -20 ° C&#39;de kısım çözüm ve mağaza, 6 aya kadar. <table border="0"><tbody><tr><td> Temel FGF </td><td> 10 mikrogram </td></tr><tr><td> D-PBS </td><td> 990μL </td></tr><tr><td> 10% BSA </td><td> 10 mcL </td></tr></tbody></table> Not: BSA aynı konsantrasyonda HSA veya Knockout SR ile ikame edilebilir. </li><li> 50 ml 2 mg / ml Dispase çözüm hazırlamak için, aseptik aşağıda listelenen bileşenleri karıştırın. Filtre 4 çözüm ve mağaza ° C 2 haftaya kadar sterilize. <table border="0"><tbody><tr><td> Dispase </td><td> 100 mg </td></tr><tr><td> D-PBS </td><td> 50 ml </td></tr></tbody></table></li><li> Besleyici-Free (KSR-FF) Tam nakavt SR 100 mL hazırlamak için aseptik aşağıdaki tabloda listelenen bileşenleri birleştirmek. <table border="1"><tbody><tr><td> Bileşen </td><td> Stok Konsantrasyon </td><td> Final Konsantrasyon </td><td> Hacim </td></tr><tr><td> Nakavt DMEM/F12 (Kat. No. 12.660-012) </td><td> - </td><td> 1X </td><td> 76.8 ml </td></tr><tr><td> GlutaMAX-I (Kat. No: 35.050-061) </td><td> 200 mm </td><td> 2 mM </td><td> 1 ml </td></tr><tr><td> Nakavt SR (Kat. no: 10.828-028) </td><td> - </td><td> % 20 </td><td> 20 ml </td></tr><tr><td> Nakavt SR-GFC (Kat. no. A10580-01) </td><td> 50X </td><td> 1X </td><td> 2 mL </td></tr><tr><td> bFGF (Kat. No. PHG0024). </td><td> 10 mcg / mL </td><td> 20 ng / ml </td><td> 200 mcL </td></tr></tbody></table> Bir haftaya kadar 2-8 ° C&#39;de KSR-FF orta saklayabilir. </li><li> Sıcaklık ve gazlar için tam orta pre-değişikti hemen önce, aseptik 0.1 mM son konsantrasyon için gerekli 2 merkaptoetanol hacmi (55 mM stok konsantrasyonu) ekleyin. Örneğin, 100 ml KSR-F hazırlamak içinF orta, 2-mercaptoethanol (1:550 dilüsyon) Alternatif olarak 55 mM 182 mcL eklemek, 2-merkaptoetanol 1X tamamlanan orta eklenir ve bir haftaya kadar 2-8 ° C&#39;de muhafaza edilebilir. </li></ol> Donma / Kriyoprezervasyon Orta hazırlanması Kriyoprezervasyon orta iki ortam oluşur; Donma Orta ve Donma Orta B. farklı zamanlarda hücreleri eklenir ve kalır ayrılmalıdır. Her Kriyoprezervasyon Orta toplam hacminin% 50 ihtiyaç vardır. Donmuş gibi her flakon için gerekli Kriyoprezervasyon Orta toplam hacim 1 ml. HESC% 90 konfluent 60mm çanak hESC banka 2 şişeleri kriyoprezervasyon medya için kullanılabilir. Tutarı düşmek sağlamak için ekstra 2-5ml her Donma Orta yeterli hacmi hazırlayın. <table border="1"><tbody><tr><td> Donma Orta A (son hacmi% 50): </td><td> 50% DMEM/F12 </td><td> 50% KSR </td></tr><tr><td> Donma Orta B (son hacmi% 50): </td><td> 80% DMEM/F12 </td><td> % 20 DMSO </td></tr></tbody></table> Örnek: 20 şişeleri hücre dondurma iseniz, Kriyoprezervasyon Orta 20ml gerekecektir. 24mL Kriyoprezervasyon Orta toplam tutarı düşmek için 4ml ekleyin. Donma Orta 12ml gerekecektir anlamına gelir (24mL% 50) ve Donma Orta B (24mL% 50), 12ml. <table border="1"><tbody><tr><td> Donma Orta A (12 ml): </td><td> 6 ml DMEM/F12 </td><td> 6 ml KSR </td></tr><tr><td> Donma Orta B (12 ml): </td><td> 9.6 mL DMEM/F12 </td><td> 2.4 mL DMSO </td></tr></tbody></table> Kriyoprezervasyon Orta nihai bileşimi% 65 DMEM/F12,% 25 KSR, ve% 10 DMSO. Dondurularak iPSCs <ol><li> 37 ° C su banyosunda Dispase Öncesi sıcak gerekli hacim. Gerekli miktarlar hakkında ayrıntılı bilgi için aşağıdaki Tablo 1&#39;e bakınız. </li><li> 37 ° C su banyosunda for15 dakika KSR-FF gerekli hacmi Pre-dengelenmesi. Tablo 1below gerekli miktarlar hakkında ayrıntılı bilgi için bakınız. </li><li> Bir pipet kullanarak kültür damarı harcanan orta aspire ve hücrelerin D-PBS ile iki kez yıkayın. </li><li> Yavaşça kültür damarı (örneğin, 60 mm kültür çanak başına Dispase çözüm 1 ml) önceden ısıtılmış Dispase çözüm ekleyin. Tüm hücre yüzeyinde kat Swirl kültür damarı. </li><li> Kültür damarı 3 dakika boyunca 37 ° C&#39;de inkübe edin. </li><li> Inkübatör geminin çıkarın, Dispase çözüm aspirat ve D-PBS ile hücrelerin nazikçe yıkayın. </li><li> Hücrelerin, hücre kazıyıcı kullanarak kültürü çanak yüzeyinden hafifçe kazıyın ve 15 mL steril bir santrifüj tüpüne hücreleri aktarmak. </li><li> Nazikçe müstakil olmayan herhangi bir hücre &quot;püskürtme&quot;, KSR-FF ile iki kez kültür çanak durulayın Havuz, 15 mL tüp hücreleri orta durulayın. </li><li> Tüp, oda sıcaklığında pelet hücreleri 5 dakika boyunca 200 xg&#39;de santrifüjleyin. </li><li> Dikkatle hücre pelletini bozmadan süpernatantı aspirat ve atın. </li><li> Cryovials yeterli miktarda hazırlayın. Hücreleri DMSO ile temas edildikten sonra, onlar aliquoted ve 2-3 dakika içinde dondurulmuş olmalıdır. </li><li> Yavaşça tam [tüp alttan hafifçe yukarı ve aşağı pipetleme 5 ml serolojik pipet kullanarak] hücre pelletini yerinden ve Donma Orta A. hücreleri yeniden askıya tüp fiske. Hafifçe karıştırın hücre süspansiyonu dönen kümeleri tek tip süspansiyon ardından, bir damla akıllıca bir şekilde, eşit miktarda Donma Orta B ekleyin. Not: Bu noktada, hücrelerin DMSO ile temas ve çalışma verimli bir şekilde yapılmalıdır. Hücreleri DMSO ile temas edildikten sonra, onlar aliquoted ve 2-3 dakika içinde dondurulmuş olmalıdır. </li><li> Her cryovial hücre süspansiyonu kısım 1 ml. </li><li> Hızla [hızla dondurma] Mr Frosty şişeleri yer ve -80 ° C gecede transfer. </li><li> ° C - -80 geceleme depolama sonra, uzun süreli depolama için bir sıvı nitrojen tankı hücreleri aktarmak. </li></ol> iPSC flakon çözülme ve hücre kurtarma Not: KSR-FF KSR-MEF-klimalı içeren orta veya besleyiciler ile kullanmak için KSR orta ile değiştirilebilir. Medya hazırlanması için talimatlar için eke bakınız. KSR-FF orta Pre-sıcak 10 ml, 50 ml tüp içinde. <ol><li> Geltrex kaplı yemekler sadece kaplama önce oda sıcaklığına uygun miktar dengelenmesi ve yemeklerinden herhangi bir sıvı aspirer hücreleri. </li><li> HESC Sıvı Azot Depolama Tankı (veya iPSC) flakon dikkatlice çıkarın. </li><li> Sadece küçük bir dondurulmuş yığın flakon kalana kadar hızla 37 ° C su banyosunda hücreler dondurulmuş flakon Çözülme. </li><li> % 70 ile dekontamine ve steril doku kültürü kaputu transfer izopropanol flakon Sprey. </li><li> Aseptik olarak 5 ml pipet kullanarak 15 ml konik bir tüp içine flakon tüm içeriğini aktarmak. </li><li> KSR-FF 1 ml Flakon durulayın ve 15 ml santrifüj tüpüne ekleyin. </li><li> Yavaşça, KSR-FF 4 mL, 15 mL konik tüp hücrelerin damla-bilge ekleyin. Orta eklerken, hücreler hafifçe karıştırın tüp ileri ve geri hareket ettirin. (Bu hücrelerin ozmotik şok azaltır). </li><li> 15 ml tüp, oda sıcaklığında 2 dakika 1000rpm (200 x g) hücre süspansiyonu ile santrifüjleyin . </li><li> Dikkatlice aspire ve hücre pelletini bozmadan süpernatantı atın. </li><li> Önceden ısıtılmış KSR-FF hücre pelet (örneğin 4mL/60 mm çanak) 5 ml pipet kullanarak hücrelerin hücre pelletini tamamen dağınık olduğu kadar yavaşça yukarı aşağı pipet ve yeniden askıya aldı. Canlılığı% 70&#39;den az ise% 70 daha fazla bir canlılığı bekleniyor, ancak, bu hücreler için izdiham ulaşmak için daha uzun sürebilir. </li><li> Aynı pipet kullanarak, hücre süspansiyonu oda sıcaklığında ön dengelenmiş Geltrex kaplı kültürü çanak açılır akıllıca aktarın. </li><li> Havada% 4 ila 6 CO 2 nemlendirilmiş bir atmosfer ile 37 ° C inkübatör kültür çanak yerleştirin. Kuzey güney, doğu batı desen hücreler eşit olarak dağıtmak için dikkatlice girdap gemi. </li><li> Yavaşça kültür tabak sıvı değiştirmek için 24 saat sonrası çözülme ve hücre enkaz kaldırmak için ve bundan sonra çanak konfluent yaklaşık% 70-80 kadar taze besin sağlamak için günlük. IPS hücreleri devam eden kültür ve Pasajlanması için, &quot;İnsan iPS Hücreler Komple nakavt Serum Yedek kullanarak Besleyici Ücretsiz Kültür ve Pasajlanması Besleyici-Alerjik Orta&quot; başlıklı protokol bakın </li></ol> Beklenen Sonuçlar Hücreleri önce kriyoprezervasyon konfluent kabaca% 70-80 olmalıdır. Kıvrık ve koloni kenarları boyunca koloniler katlayarak sindirim sonuçları Dispase. Sonra hasat hücrelerin dondurulması medyada küçük kümeleri olarak dondurulur. Flakon çözülmüş sonra, hücreler kurtarmak ve küçük kümeleri olarak önceden kaplı çanak eklemek. Bunlar hızla konfluent 5-6 gün içinde bir çanak lider büyür. Tablo 1 - Önerilen Hacimleri <table border="1"><tbody><tr><td> Bileşen </td><td> 35mm Bulaşık </td><td> 60mm Bulaşık </td><td> 100mm Bulaşık </td></tr><tr><td> Komple nakavt SR orta </td><td> 2 mL </td><td> 4 mL </td><td> 10 ml </td></tr><tr><td> Geltrex Çözüm </td><td> 1 ml </td><td> 1,5 mL </td><td> 4-5 ml </td></tr><tr><td> Dispase </td><td> 0,5 mL </td><td> 1 ml </td><td> 3-4 ml </td></tr><tr><td> Durulama için D-PBS </td><td> 2 mL </td><td> 4 mL </td><td> 10 ml </td></tr></tbody></table> Lütfen <a href="https://www.jove.com/files/ftp_upload/2237/2237_appendix.pdf">ek görmek için tıklayınız</a> .

<ol><li>Takahashi, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Induction+of+pluripotent+stem+cells+from+mouse+embryonic+and+adult+fibroblast+cultures+by+defined+factors%5BTitle%5D)+AND+%22Cell%22%5BJournal%5D)">Induction of pluripotent stem cells from mouse embryonic and adult fibroblast cultures by defined factors.</a> Cell. 126, 663-676 (2006).</li>
<li>Takahashi, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Induction+of+pluripotent+stem+cells+from+adult+human+fibroblasts+by+defined+factors%5BTitle%5D)+AND+%22Cell%22%5BJournal%5D)">Induction of pluripotent stem cells from adult human fibroblasts by defined factors.</a> Cell. 131, 861-872 (2007).</li>
<li>Yu, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Induced+pluripotent+stem+cell+lines+derived+from+human+somatic+cells%5BTitle%5D)+AND+%22Science%22%5BJournal%5D)">Induced pluripotent stem cell lines derived from human somatic cells.</a> Science. 318, 1917-1920 (2007).</li>
<li>Maherali, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Guidelines+and+techniques+for+the+generation+of+induced+pluripotent+stem+cells%5BTitle%5D)+AND+%22Cell+Stem+Cell%22%5BJournal%5D)">Guidelines and techniques for the generation of induced pluripotent stem cells.</a> Cell Stem Cell. 3, 595-605 (2008).</li>
<li>Li, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Generation+of+rat+and+human+induced+pluripotent+stem+cells+by+combining+genetic+reprogramming+and+chemical+inhibitors%5BTitle%5D)+AND+%22Cell+Stem+Cell%22%5BJournal%5D)">Generation of rat and human induced pluripotent stem cells by combining genetic reprogramming and chemical inhibitors.</a> Cell Stem Cell. 4, 16-19 (2009).</li>
<li>Liao, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Generation+of+induced+pluripotent+stem+cell+lines+from+adult+rat+cells%5BTitle%5D)+AND+%22Cell+Stem+Cell%22%5BJournal%5D)">Generation of induced pluripotent stem cell lines from adult rat cells.</a> Cell Stem Cell. 4, 11-15 (2009).</li>
<li>Dimos, J. T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Induced+pluripotent+stem+cells+generated+from+patients+with+ALS+can+be+differentiated+into+motor+neurons%5BTitle%5D)+AND+%22Science%22%5BJournal%5D)">Induced pluripotent stem cells generated from patients with ALS can be differentiated into motor neurons.</a> Science. 321, 1218-1221 (2008).</li>
<li>Aasen, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Efficient+and+rapid+generation+of+induced+pluripotent+stem+cells+from+human+keratinocytes%5BTitle%5D)+AND+%22Nat+Biotechnli%22%5BJournal%5D)">Efficient and rapid generation of induced pluripotent stem cells from human keratinocytes.</a> Nat Biotechnli. 26, 1276-1284 (2008).</li>
<li>Park, I. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Generation+of+human-induced+pluripotent+stem+cells%5BTitle%5D)+AND+%22Nat+Protoc%22%5BJournal%5D)">Generation of human-induced pluripotent stem cells.</a> Nat Protoc. 3, 1180-1186 (2008).</li>
</ol>

Bu makalenin yazarları, bu yazıda kullanılan reaktifler ve aletleri üreten Life Teknolojileri tarafından istihdam edilmektedir.

<table><tbody><tr><td>Knockout DMEM/F12</td><td></td><td>12660-012</td><td>Note: see appendix for the use of alternative DMEM products GlutaMAX-I (Cat. No. 35050-061)</td></tr><tr><td>KnockOut Serum Replacement</td><td></td><td>10828-028</td><td></td></tr><tr><td>KnockOut Serum Replacement Growth Factor Cocktail</td><td></td><td>A10580-01</td><td></td></tr><tr><td>FGF-basic, human recombinant protein, 10 &amp;mu;g</td><td></td><td>PHG0024</td><td>Note: see appendix for alternative bFGF pack sizes.</td></tr><tr><td>2-Mercapt&amp;#8211;thanol</td><td></td><td>21985-023</td><td></td></tr><tr><td>Dispase</td><td></td><td>17105-041</td><td>Note: see appendix for alternative passaging methods</td></tr><tr><td>Geltrex hESC-Qualified Reduced Growth Factor Basement Matrix, 1 mL</td><td></td><td>A10480-01</td><td></td></tr><tr><td>Dulbecco&amp;rsquo;s Phosphate Buffered Saline (D-PBS) without calcium and magnesium</td><td></td><td>14190-144</td><td></td></tr><tr><td>DMSO, 500mL</td><td>JT Baker</td><td>JT9224-1</td><td></td></tr><tr><td>Sterile Tissue Culture Hood</td><td></td><td></td><td></td></tr><tr><td>Incubator set at 37&amp;#x00B0;C</td><td></td><td></td><td></td></tr><tr><td>Pipette-Aid</td><td></td><td></td><td></td></tr><tr><td>Water Bath set at 37&amp;#x00B0;C</td><td></td><td></td><td></td></tr><tr><td>Sterile serological pipettes (5 mL, 10 mL)</td><td></td><td></td><td></td></tr><tr><td>Centrifuge</td><td></td><td></td><td></td></tr><tr><td>15 mL centrifuge tubes</td><td></td><td></td><td></td></tr><tr><td>60 mm Tissue Culture treated dishes</td><td></td><td></td><td></td></tr><tr><td>Liquid nitrogen storage tank</td><td></td><td></td><td></td></tr><tr><td>Isopropanol freezing containers</td><td></td><td></td><td></td></tr><tr><td>1.5 mL Cryovials</td><td></td><td></td><td></td></tr></tbody></table>

cryopreserving and recovering of human ips cells using complete knockout serum replacement feeder-free medium

2006 yılında, insan ve fare fibroblastlar dikkat çekici embriyonik kök hücrelere benzer nitelikleri ile 1-3 iPS hücreleri üretmek yeniden olabilir keşif pluripotent hücrelerin hücre tedavisi, ilaç keşfi ve temel araştırmalar için değerli bir yeni kaynak yaratmıştır . Gibco medya ve reaktifler yıllardır pluripotent kök hücre araştırmaları ön planda olmuştur. DMEM Nakavt Nakavt Serum Değiştirme ile desteklenmiş, embriyonik kök hücre büyümesi ve şimdi iPS hücre kültürü 3-9 için tercih edilen medya . Bu altın standart medya sistemi artık Nakavt SR Büyüme Faktörü Kokteyli ilavesi ile besleyici ücretsiz kültür kullanılabilir. Geleneksel insan ES ve iPS hücre kültürü yöntemleri, fare veya insan fibroblast besleyici katmanları veya besleyici klimalı ortamı gerektirir. Bu kültür yöntemleri ölçekli, emek-yoğun, sert ve tanımlanmamış durumlar nedeniyle farklılaşmamış kalça hücreleri korumak için zordur. Invitrogen Nakavt SR hala korurken, kalça ve embriyonik kök hücre kültürlerinde kolaylıkla geçiş için besleyici ücretsiz izin Nakavt SR Büyüme Faktörü Kokteyl geliştirdi.

Watch this Scientific Journal Video about Cryopreserving and Recovering of Human iPS Cells using Complete KnockOut Serum Replacement Feeder-Free Medium at JoVE.com

Cryopreserving and Recovering of Human iPS Cells using Complete KnockOut Serum Replacement Feeder-Free Medium

Bu protokol nakavt SR kriyoprezervasyon orta insan iPS hücreleri dondurularak ve bu hücrelerin tam nakavt SR Besleyici Ücretsiz (KSR-FF), orta ya da besleyici tabanlı nakavt SR orta kurtarmak için ayrıntılı prosedürü anlatılmaktadır.

İnsan iPS hücreleri dondurularak ve kurtarma Tam nakavt Serum Yedek Besleyici-Alerjik Orta

The discovery in 2006 that human and mouse fibroblasts could be reprogrammed to generate iPS cells 1-3 with qualities remarkably similar to embryonic stem ...

cryopreserving-recovering-human-ips-cells-using-complete-knockout

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Video: Cryopreserving and Recovering of Human iPS Cells using Complete KnockOut Serum Replacement Feeder-Free Medium

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.

Sox-2 Zorla İfade yoluyla MEFS iPS Hücreler oluşturma, Eki 4, c-Myc ve 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., ...

Biyoloji

Small-scale Propagation of Human iPSCs in Serum-free Conditions for Routine Immunocytochemical Characterization

There is great interest in utilizing human induced pluripotent stem cells (hiPSCs) for disease modeling and cell therapeutics due to their patient specificity and characteristic stemness. However, the pluripotency of iPSCs, which is essential to their functionality, must be confirmed before these cells can be used in such applications. While a rigorous characterization of iPSCs, through different cellular and functional assays is necessary to establish their pluripotency, routine assessment of pluripotency maintenance can be achieved more simply and effectively through immunocytochemical techniques. Here, we present a systematic protocol for culturing hiPSCs, in a scaled-down manner, to particularly facilitate the verification of their pluripotent state using immunocytochemistry. More specifically, this methodology encompasses an efficient and cost-effective means of growing iPSCs in serum-free conditions and plating them on small chamber slides or glass coverslips ideal for immunocytochemistry.

Regular characterization of induced pluripotent stem cells (iPSCs), to ascertain maintenance of their pluripotent state, is an important step before these cells are used for other applications. Here we describe a method for the small-scale propagation of human iPSCs specifically designed to enable their easy and routine characterization via immunocytochemistry.

Rutin İmmünositokimyasal Karakterizasyonu için serum serbest şartlar İnsan iPSCs küçük ölçekli Yayılım

There is great interest in utilizing human induced pluripotent stem cells (hiPSCs) for disease modeling and cell therapeutics due to their patient ...

Gelişim Biyolojisi

Defined Xeno-free and Feeder-free Culture Conditions for the Generation of Human iPSC-derived Retinal Cell Models

The production of specialized cells from pluripotent stem cells provides a powerful tool to develop new approaches for regenerative medicine. The use of human-induced pluripotent stem cells (iPSCs) is particularly attractive for neurodegenerative disease studies, including retinal dystrophies, where iPSC-derived retinal cell models mark a major step forward to understand and fight blindness. In this paper, we describe a simple and scalable protocol to generate, mature, and cryopreserve retinal organoids. Based on medium changing, the main advantage of this method is to avoid multiple and time-consuming steps commonly required in a guided differentiation of iPSCs. Mimicking the early phases of retinal development by successive changes of defined media on adherent human iPSC cultures, this protocol allows the simultaneous generation of self-forming neuroretinal structures and retinal pigmented epithelial (RPE) cells in a reproducible and efficient manner in 4 weeks. These structures containing retinal progenitor cells (RPCs) can be easily isolated for further maturation in a floating culture condition enabling the differentiation of RPCs into the seven retinal cell types present in the adult human retina. Additionally, we describe quick methods for the cryopreservation of retinal organoids and RPE cells for long-term storage. Combined together, the methods described here will be useful to produce and bank human iPSC-derived retinal cells or tissues for both basic and clinical research.

The production of specialized retinal cells from pluripotent stem cells is a turning point in the development of stem cell-based therapy for retinal diseases. The present paper describes a simple method for an efficient generation of retinal organoids and retinal pigmented epithelium for basic, translational, and clinical research.

Tanımlanmış Xeno-alerjik ve besleyici-Alerjik kültür koşulları üretimi insan IPSC kaynaklı Retina hücre modelleri için

The production of specialized cells from pluripotent stem cells provides a powerful tool to develop new approaches for regenerative medicine. The use of ...

Feeder-Free Adaptation, Culture and Passaging of Human IPS Cells using Complete KnockOut Serum Replacement Feeder-Free Medium

The discovery in 2006 that human and mouse fibroblasts could be reprogrammed to generate iPS cells 1-3 with qualities remarkably similar to embryonic stem cells has created a valuable new source of pluripotent cells for drug discovery, cell therapy, and basic research.
GIBCO media and reagents have been at the forefront of pluripotent stem cell research for years. Knockout DMEM supplemented with Knockout Serum Replacement is the media of choice for embryonic stem cell growth and now iPS cell culture 3-9. This gold standard media system can now be used for feeder-free culture with the addition of Knockout SR Growth Factor Cocktail.
Traditional human ES and iPS cell culture methods require the use of mouse or human fibroblast feeder layers, or feeder-conditioned medium. These culture methods are labor-intensive, hard to scale and it is difficult to maintain hiPS cells undifferentiated due to the undefined conditions. Invitrogen has developed Knockout SR Growth Factor Cocktail to allow you to easily transition your hiPS cell cultures to feeder-free while still maintaining your use of Knockout SR.

The following protocol provides instruction for adapting human induced Pluripotent Stem (iPS) Cells to feeder-free culture using complete KnockOut Serum Replacement Feeder-Free medium (KSR-FF). Once adapted, instructions for continual maintenance are also provided.

İnsan IPS Hücreler Komple nakavt Serum Yedek Besleyici-Alerjik Orta kullanarak Besleyici Adaptasyon, Kültür ve Pasajlanması

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.

İnsan İsteyerek Pluripotent Kök Hücreler transfekte ve Nucleofecting

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.

İnsan İsteyerek Pluripotent Kök Hücre seçme ve ayırma Kolonileri Yetişkin Fibroblastlar gelen reprogrammed

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

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.

İnsan kardiyomiyositleri Üretimi: Besleyici-ücretsiz İnsan Bağlı Pluripotent Kök Hücre A Farklılaşma Protokolü

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

Cell Surface Marker Mediated Purification of iPS Cell Intermediates from a Reprogrammable Mouse Model

Mature cells can be reprogrammed to a pluripotent state. These so called induced pluripotent stem (iPS) cells are able to give rise to all cell types of the body and consequently have vast potential for regenerative medicine applications. Traditionally iPS cells are generated by viral introduction of transcription factors Oct-4, Klf-4, Sox-2, and c-Myc (OKSM) into fibroblasts. However, reprogramming is an inefficient process with only 0.1-1% of cells reverting towards a pluripotent state, making it difficult to study the reprogramming mechanism. A proven methodology that has allowed the study of the reprogramming process is to separate the rare intermediates of the reaction from the refractory bulk population. In the case of mouse embryonic fibroblasts (MEFs), we and others have previously shown that reprogramming cells undergo a distinct series of changes in the expression profile of cell surface markers which can be used for the separation of these cells. During the early stages of OKSM expression successfully reprogramming cells lose fibroblast identity marker Thy-1.2 and up-regulate pluripotency associated marker Ssea-1. The final transition of a subset of Ssea-1 positive cells towards the pluripotent state is marked by the expression of Epcam during the late stages of reprogramming. Here we provide a detailed description of the methodology used to isolate reprogramming intermediates from cultures of reprogramming MEFs. In order to increase experimental reproducibility we use a reprogrammable mouse strain that has been engineered to express a transcriptional transactivator (m2rtTA) under control of the Rosa26 locus and OKSM under control of a doxycycline responsive promoter. Cells isolated from these mice are isogenic and express OKSM homogenously upon addition of doxycycline. We describe in detail the establishment of the reprogrammable mice, the derivation of MEFs, and the subsequent isolation of intermediates during reprogramming into iPS cells via fluorescent activated cells sorting (FACS).

Mouse embryonic fibroblast can be reprogrammed into induced pluripotent stem cells at low efficiency by the forced expression of transcription factors Oct-4, Sox-2, Klf-4, c-Myc. The rare intermediates of the reprogramming reaction are FACS isolated via labeling with antibodies against cell surface makers Thy-1.2, Ssea-1, and Epcam.

Bir programlayabilme Fare Modeli iPS Hücre araürünler Hücre Yüzey Etiket Aracılı Arıtma

Mature cells can be reprogrammed to a pluripotent state. These so called induced pluripotent stem (iPS) cells are able to give rise to all cell types of ...

Efficient iPS Cell Generation from Blood Using Episomes and HDAC Inhibitors

This manuscript illustrates a protocol for efficiently creating integration-free human induced pluripotent stem cells (iPSCs) from peripheral blood using episomal plasmids and histone deacetylase (HDAC) inhibitors. The advantages of this approach include: (1) the use of a minimal amount of peripheral blood as a source material; (2) nonintegrating reprogramming vectors; (3) a cost effective method for generating vector free iPSCs; (4) a single transfection; and (5) the use of small molecules to facilitate epigenetic reprogramming. Briefly, peripheral blood mononuclear cells (PBMCs) are isolated from routine phlebotomy samples and then cultured in defined growth factors to yield a highly proliferative erythrocyte progenitor cell population that is remarkably amenable to reprogramming. Nonintegrating, nontransmissible episomal plasmids expressing OCT4, SOX2, KLF4, MYCL, LIN28A, and a p53 short hairpin (sh)RNA are introduced into the derived erythroblasts via a single nucleofection. Cotransfection of an episome that expresses enhanced green fluorescent protein (eGFP) allows for easy identification of transfected cells. A separate replication-deficient plasmid expressing Epstein-Barr nuclear antigen 1 (EBNA1) is also added to the reaction mixture for increased expression of episomal proteins. Transfected cells are then plated onto a layer of irradiated mouse embryonic fibroblasts (iMEFs) for continued reprogramming. As soon as iPSC-like colonies appear at about twelve days after nucleofection, HDAC inhibitors are added to the medium to facilitate epigenetic remodeling. We have found that the inclusion of HDAC inhibitors routinely increases the generation of fully reprogrammed iPSC colonies by 2 fold. Once iPSC colonies exhibit typical human embryonic stem cell (hESC) morphology, they are gently transferred to individual iMEF-coated tissue culture plates for continued growth and expansion.

Here we describe a protocol for generating human induced pluripotent stem cells from peripheral blood using an episome based reprogramming strategy and histone deacetylase inhibitors.

Epizomlar ve HDAC inhibitörleri kullanarak Blood Verimli iPS Hücre Üretimi

This manuscript illustrates a protocol for efficiently creating integration-free human induced pluripotent stem cells (iPSCs) from peripheral blood using ...

Advances in Human Induced Pluripotent Stem Cell-Derived Chimeric Antigen Receptor-Expressing Natural Killer Cells

Natural killer (NK) cells are innate immune cells that play a crucial role in the body's defense against tumors and viral infections. The generation of human induced pluripotent stem cell (iPSC)-derived chimeric antigen receptor (CAR) expressing NK cells has emerged as a promising avenue for "off the shelf" cancer immunotherapy. Here, we utilized an NK cell-optimized CAR construct that includes the transmembrane domain of NKG2D, the 2B4 co-stimulatory domain, and the CD3&#950; signaling domain, which has been demonstrated to stimulate robust antigen-specific NK cell-mediated antitumor activity. The use of iPSCs for CAR NK cell generation offers several advantages, including homogenous CAR expression, scalability, reproducibility, and the potential for clinical application. This detailed step-by-step protocol from cell engineering to differentiation enables the generation of NK cell-optimized iPSC-derived CAR-expressing NK cells, providing a standardized and targeted cancer immunotherapy with improved antitumor activity and highlighting their potential as a promising treatment option for various malignancies.

Here, we present a method to differentiate and expand human iPSC-derived chimeric antigen receptor (CAR)-expressing natural killer cells with improved killing against various malignancies. This protocol demonstrates the differentiation and expansion of natural killer (NK) optimized iPSC-derived CAR-NK cells and the measurement of antitumor activity against various tumor cell lines.

İnsan Kaynaklı Pluripotent Kök Hücre Kaynaklı Kimerik Antijen Reseptörü İfade Eden Doğal Öldürücü Hücrelerdeki Gelişmeler

Natural killer (NK) cells are innate immune cells that play a crucial role in the body's defense against tumors and viral infections. The generation of ...