فإن الكتاب أن نعترف الدكتور فيليب H. شوارتز من العصبية الوطنية الجذعية البشرية الموارد خلية في مستشفى الأطفال في ليالي ، أورانج كاونتي معهد البحوث لتوفير hNSPC الثقافات.

ملاحظة : يرجى الرجوع إلى الإنسان الركض الخلايا الجذعية العصبية المادة ( <a href="/index/Details.stp?ID=263">https://www.jove.com/index/Details.stp؟ID=263</a> ) والإنسان العصبية العد المادة الخلايا الجذعية ( <a href="/index/Details.stp?ID=262">https://www.jove.com / مؤشر / Details.stp؟ ID = 262</a> ) لمعرفة كيفية resuspend hNSPCs والعد. إعداد <ol style=";text-align:right;direction:rtl"><li style=";text-align:right;direction:rtl"> تأكد من أن هناك الكثير من الخلايا المتاحة لترنسفكأيشن (أن عدة ملايين من الخلايا transfected لكل DNA). </li><li style=";text-align:right;direction:rtl"> معطف زراعة الأنسجة طبق ، الذي سيتم المصنف الخلايا transfected ، مع 10 ميكروغرام / مل فبرونيكتين الإنسان في الليلة التي سبقت ترنسفكأيشن. الحق قبل البدء في بروتوكول ترنسفكأيشن ، إزالة فبرونيكتين ، شطف الطبق مع برنامج تلفزيوني ، الثقافة والإعلام في مكان الطبق. يترك الطبق في 37 ° C زراعة الأنسجة حاضنة دافئة للوسائل الإعلام. أيضا ، ضع 1 مل من وسائل الإعلام الثقافة في حاضنة دافئة لمرحلة ما قبل إلى 37 درجة مئوية. </li><li style=";text-align:right;direction:rtl"> مكان الحمض النووي (ق) ليكون transfected ، والحل ترنسفكأيشن (من Amaxa) على الجليد. </li></ol> ترنسفكأيشن <ol style=";text-align:right;direction:rtl"><li style=";text-align:right;direction:rtl"> يغسل عدد محدد من الخلايا التي تحتوي على برنامج تلفزيوني (ونحن عادة استخدام ~ 5 × 106 خلية لكل ترنسفكأيشن). بيليه الخلايا بواسطة الطرد المركزي (1000 دورة في الدقيقة (~ 200xg) لمدة 5 دقائق) ، وإزالة أكبر قدر ممكن من برنامج تلفزيوني ، وresuspend الكرية الخلية في 100 ميكرولتر من الحل ترنسفكأيشن قدمت مع عدة ترنسفكأيشن. تعليق نقل الخلية إلى أنبوب 1.7 مل إيبندورف. </li><li style=";text-align:right;direction:rtl"> إضافة 5 ميكرولتر من الحمض النووي (~ 50-10 ميكروغرام من الحمض النووي لكل ترنسفكأيشن) الى تعليق الخلية والمزيج بلطف. </li><li style=";text-align:right;direction:rtl"> باستخدام Amaxa مصغرة ماصة ، ونقل المزيج خلية الحمض النووي في كفيت ترنسفكأيشن Amaxa. تأكد أن لديك 1 مل من وسائل الاعلام ثقافة ما قبل تحسنت للخطوة التالية. أيضا ، إزالة الطبق الخلية مع وسائل الاعلام من حاضنة الثقافة ووضعه في نسيج الثقافة هود. </li><li style=";text-align:right;direction:rtl"> ضع كفيت في Nucleofector ، تدوير عجلة عقارب الساعة ، وحدد برنامج &quot;A - 033&quot;. أدخل الصحافة. </li><li style=";text-align:right;direction:rtl"> يشار إلى ترنسفكأيشن الناجحة التي قام بها وجود طبقة كثيفة جدا من الفقاعات على رأس الحل في كفيت. إضافة 500 وسائل الإعلام في الحارة ميكرولتر كفيت ، واستخدام Amaxa صغيرة ماصة ، ونقل الخلايا transfected في الطبق مع تحسنت قبل وسائل الإعلام. شطف كفيت مع وسائل الإعلام أكثر دافئ وإضافة إلى شطف الطبق نفسه. مكان الطبق مع الخلايا في زراعة الأنسجة 37 ° C الحاضنة. </li></ol>

<ol>
	<li>Gresch, O., Engel, F. B., Nesic, D., Tran, T. T., England, H. M., Hickman, E. S., Krner, I., Gan, L., Chen, S., Castro-Obregon, S., Hammermann, R., Wolf, J., M ller-Hartmann, H., Nix, M., Siebenkotten, G., Kraus, G., Lun, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=New+non-viral+method+for+gene+transfer+into+primary+cells.">New non-viral method for gene transfer into primary cells.</a> Methods. 33, 151-163 (2004).</li><li>Marchenko, S., Flanagan, L. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Passaging+Human+Neural+Stem+Cells.">Passaging Human Neural Stem Cells.</a> Journal of Visualized Experiments. 7, (2007).</li><li>Marchenko, S., Flanagan, L. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Counting+Human+Neural+Stem+Cells.">Counting Human Neural Stem Cells.</a> Journal of Visualized Experiments. 7, (2007).</li></ol>

يصف هذا البروتوكول إجراء ترنسفكأيشن سريع نسبيا وفعالة لhNSPCs. باستخدام هذا الإجراء ، لقد حصلنا على الكفاءة ترنسفكأيشن الأولي 35 ٪ ~. ويمكن استخدام الخلايا transfected بواسطة هذا الإجراء على المدى القصير دراسات (خلايا transfected عابر) أو على المدى الطويل إذا تم استخدام الدراسات عامل التحديد إلى إنشاء ستابلي transfected السكان. لقد ولدت لنا الخلايا التي transfected ستابلي ~ 70 ٪ من الخلايا التعبير عن بروتين خارجية. في hNSPCs transfected عابر ، لاحظنا استمرار التعبير من البروتين الخارجية لأيام 7 ~.

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<td>The Nucleofector Device</td>
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<td>Mouse neural stem cell nucleofector kit</td>
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transfecting human neural stem cells with the amaxa nucleofector

وقد أدى ترنسفكأيشن من الخلايا العصبية في الثدييات الأولية ، مثل الخلايا الجذعية البشرية / السلائف العصبي (hNSPCs) ، مع استخداما الموجبة الكواشف ترنسفكأيشن الدهون غالبا في بقاء الخلية الفقراء وذوي الكفاءة ترنسفكأيشن. محدودة أيضا الطرق الميكانيكية الأخرى لإدخال الجين في المصالح ، مثل مدفع الجينات أو microinjection ، من خلال بقاء الخلية الفقراء وانخفاض أعداد خلايا transfected. وقد تم تقييد استخدام استراتيجية يبني الفيروسية لإدخال جينة في الخلايا الخارجية الابتدائي بحلول المبلغ كل من الوقت والعمل المطلوب لإنشاء نواقل الفيروسية ومخاوف تتعلق بالسلامة المحتملة. نحن هنا وصف بروتوكول خطوة بخطوة لtransfecting hNSPCs باستخدام جهاز لAmaxa Nucleofector والتكنولوجيا مع معلمات التيار الكهربائي والحلول العازلة على وجه التحديد الأمثل لtransfecting الخلايا الجذعية العصبية. باستخدام هذا البروتوكول ، حققنا الكفاءة ترنسفكأيشن الأولي 35 ٪ ~ ~ و 70 ٪ بعد ترنسفكأيشن مستقرة. بروتوكول يستلزم الجمع بين عدد كبير من hNSPCs مع الحمض النووي ليكون transfected في المنطقة العازلة المناسبة تليها electroporation مع الجهاز Nucleofector.

Watch this Scientific Journal Video about Transfecting Human Neural Stem Cells with the Amaxa Nucleofector at JoVE.com

Transfecting Human Neural Stem Cells with the Amaxa Nucleofector

إدخال الجينات في المصالح في خلية هي طريقة فعالة لتوضيح وظيفتها في الجسم الحي. يصف هذا البروتوكول وسيلة فعالة لtransfecting ثقافة الخلايا الجذعية البشرية / السلائف العصبي (hNSPCs) باستخدام جهاز electroporation Nucleofector التي Amaxa.

Transfecting الإنسان الخلايا الجذعية العصبية مع Nucleofector Amaxa

Transfection of primary mammalian neural cells, such as human neural stem/precursor cells (hNSPCs), with commonly used cationic lipid transfection ...

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23.4K Views.  University of California, Irvine (UCI). إدخال الجينات في المصالح في خلية هي طريقة فعالة لتوضيح وظيفتها في الجسم الحي. يصف هذا البروتوكول وسيلة فعالة لtransfecting ثقافة الخلايا الجذعية البشرية / السلائف العصبي (hNSPCs) باستخدام جهاز electroporation Nucleofector التي Amaxa.

Video: Transfecting Human Neural Stem Cells with the Amaxa Nucleofector

Counting Human Neural Stem Cells

Knowledge of the exact number of viable cells in a given volume of a cell suspension is required for many routine tissue culture manipulations, such as plating cells for immunocytochemistry or for cell transfections. This protocol describes a straightforward and fast method for differentiating between live and dead cells and quantifying the cell concentration and total cell number using a hemacytometer. This procedure first requires detaching cells from a growth surface and resuspending them in media. Next, the cells are diluted in a solution of Trypan blue (ideally to a concentration that will give 20-50 cells per quadrant) and placed in the hemacytometer. Finally, averaging the counts of viable cells in several randomly selected quadrants, dividing the average by the volume of one 1 mm2 quadrant (0.1 &mu;l) and multiplying by the dilution factor gives the number of cells per l. Multiplying this cell concentration by the total volume in &mu;l gives the total cell number. This protocol describes counting human neural stem/precursor cells (hNSPCs), but can also be used for many other cell types.

Knowledge of the exact number of viable cells is required for many tissue culture manipulations. This protocol describes how to differentiate between live and dead cells and quantify cells using a hemacytometer. Although it describes counting human neural stem/precursor cells (hNSPCs), it can be used for other cell types.

عد الخلايا الجذعية العصبية البشرية

Knowledge of the exact number of viable cells in a given volume of a cell suspension is required for many routine tissue culture manipulations, such as ...

Passaging Human Neural Stem Cells

The ability to manipulate human neural stem/precursor cells (hNSPCs) in vitro provides a means to investigate their utility as cell transplants for therapeutic purposes as well as to explore many fundamental processes of human neural development and pathology.  This protocol presents a simple method of culturing and passaging hNSPCs in hopes of standardizing this technique and increasing reproducibility of human stem cell research.  The hNSPCs we use were isolated from cadaveric postnatal brain cortices by the National Human Neural Stem Cell Resource and grown as adherent cultures on flasks coated with fibronectin (Palmer et al., 2001; Schwartz et al., 2003).  We culture our hNSPCs in a DMEM:F12 serum-free media supplemented with EGF, FGF, and PDGF and passage them 1:2 approximately every seven days.  Using these conditions, the majority of the cells in the culture maintain a bipolar morphology and express markers of undifferentiated neural stem cells (such as nestin and sox2).

The ability to manipulate human neural stem/precursor cells (hNSPCs) in vitro allows to investigate their utility as cell transplants for therapeutic purposes and to explore human neural development. This protocol presents a method of culturing and passaging hNSPCs in hopes of increasing reproducibility of human stem cell research.

الركض الخلايا الجذعية العصبية البشرية

The ability to manipulate human neural stem/precursor cells (hNSPCs) in vitro provides a means to investigate their utility as cell transplants for ...

Immunocytochemistry: Human Neural Stem Cells

Immunocytochemistry is a very powerful and fairly straightforward method for determining the presence, subcellular localization, and relative abundance of an antigen of interest, most commonly a protein, in cultured cells. This protocol presents an easy-to-follow series of steps that will enable researchers to conserve primary and secondary antibodies while getting high quality, reproducible qualitative and quantitative data out of their staining. There are two aspects of this protocol that help to conserve the volume of antibody necessary for staining. For one, the cells are grown on small, circular coverslips that are placed in wells of a tissue culture plate. After fixation, the cells on coverslips can be removed from the wells of the plate. For antibody staining, the coverslip with cells is inverted onto a small drop of antibody solution on parafilm and is covered with a second piece of parafilm to prevent drying. Using this method, only ~25 &mu;l of antibody solution is needed for each coverslip (or sample) to be stained. This protocol describes immunostaining of human neural stem/precursor cells (hNSPCs), but can be used for many other cell types.

Immunocytochemistry is a powerful method to determine the presence, subcellular localization, and relative abundance of an antigen of interest in cultured cells. This protocol presents an easy-to-follow series of steps that will enable one to conserve antibodies and get the most out of one's staining.

كيمياء سيتولوجية مناعية : الخلايا الجذعية العصبية البشرية

Immunocytochemistry is a very powerful and fairly straightforward method for determining the presence, subcellular localization, and relative abundance of ...

Labeling Stem Cells with Fluorescent Dyes for non-invasive Detection with Optical Imaging

Optical imaging (OI) is an easy, fast and inexpensive tool for in vivo monitoring of new stem cell based therapies. The technique is based on ex vivo labeling of stem cells with a fluorescent dye, subsequent intravenous injection of the labeled cells and visualization of their accumulation in specific target organs or pathologies. The presented technique demonstrates how we label human mesenchymal stem cells (hMSC) by simple incubation with the lipophilic fluorescent dye DiD (C67H103CIN2O3S) and how we label human embryonic stem cells (hESC) with the FDA approved fluorescent dye Indocyanine Green (ICG). The uptake mechanism is via adherence and diffusion of the lypophilic dye across the phospholipid cell membrane bilayer. The labeling efficiency is usually improved if the cells are incubated with the dye in serum-free media as opposed to incubation in serum-containing media. Furthermore, the addition of the transfection agent Protamine Sulfate significantly improves contrast agent uptake.

This video shows techniques for labeling of human embryonic stem cells and mesenchymal stem cells with fluorescent dyes. This technique can be used for an in vivo tracking of transplanted stem cells with optical imaging and for histopathological correlations with fluorescence microscopy.

وسم الخلايا الجذعية مع الأصباغ نيون للمنظمات غير الغازية مع الكشف عن التصوير الضوئي

Optical imaging (OI) is an easy, fast and inexpensive tool for in vivo monitoring of new stem cell based therapies. The technique is based on ex vivo ...

Mouse Epidermal Neural Crest Stem Cell (EPI-NCSC) Cultures

EPI-NCSC are remnants of the embryonic neural crest in an adult location, the bulge of hair follicles. They are multipotent stem cells that have the physiological property to generate a wide array of differentiated cell types, including neurons, nerve supporting cells, smooth muscle cells, bone/cartilage cells and melanocytes. EPI-NCSC are easily accessible in the hairy skin and can be isolated as a highly pure population of stem cells. This video provides a detailed protocol for preparing mouse EPI-NCSC cultures from whisker follicles. The whisker pad of an adult mouse is removed, and whisker follicles dissected. The follicles are then cut longitudinally and subsequently transversely above and below the bulge region. The bulge is removed from the collagen capsule and placed in a culture plate. EPI-NCSC start to emigrate from the bulge explants 3 to 4 days later.

Mouse Epidermal Neural Crest Stem Cell EPI-NCSC Cultures

Here we show our method to isolate mouse epidermal neural crest stem cells (EPI-NCSC). Technique involves micro-dissecting whisker follicles, isolating the bulge and placeing it into tissue culture. EPI-NCSC start to emigrate from bulge explants onto the substratum within 3 - 4 days.

الماوس البشرة الجذعية العصبية خلية كريست (EPI - NCSC) الثقافات

EPI-NCSC are remnants of the embryonic neural crest in an adult location, the bulge of hair follicles. They are multipotent stem cells that have the ...

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.

تعيين جيل من الخلايا الجذعية المحفزة المستحثة عن طريق إعادة برمجة الخلايا الليفية الإنسان مع الإنسان الفيروسة البطيئة TF Stemgent

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

Xenotransplantation of Human Stem Cells into the Chicken Embryo

The chicken embryo is a classical animal model for studying normal embryonic and fetal development and for xenotransplantation experiments to study the behavior of cells in a standardized in vivo environment. The main advantages of the chicken embryo include low cost, high accessibility, ease of surgical manipulation and lack of a fully developed immune system. Xenotransplantation into chicken embryos can provide valuable information about cell proliferation, differentiation and behavior, the responses of cells to signals in defined embryonic tissue niches, and tumorigenic potential. Transplanting cells into chicken embryos can also be a step towards transplantation experiments in other animal models. Recently the chicken embryo has been used to evaluate the neurogenic potential of human stem and progenitor cells following implantation into neural anlage1-6. In this video we document the entire procedure for transplanting human stem cells into the developing central nervous system of the chicken embryo. The procedure starts with incubation of fertilized eggs until embryos of the desired age have developed. The eggshell is then opened, and the embryo contrasted by injecting dye between the embryo and the yolk. Small lesions are made in the neural tube using microsurgery, creating a regenerative site for cell deposition that promotes subsequent integration into the host tissue. We demonstrate injections of human stem cells into such lesions made in the part of the neural tube that forms the hindbrain and the spinal cord, and into the lumen of the part of the neural tube that forms the brain. Systemic injections into extraembryonic veins and arteries are also demonstrated as an alternative way to deliver cells to vascularized tissues including the central nervous system. Finally we show how to remove the embryo from the egg after several days of further development and how to dissect the spinal cord free for subsequent physiological, histological or biochemical analyses.

In this paper we present a method for transplanting human stem cells into various regions of the central nervous system of the chicken embryo. This provides an in vivo model for assessing the proliferation and differentiation of various types of human stem cells in embryonic tissue environments.

زرع الأعضاء من الخلايا الجذعية البشرية إلى الأجنة الدجاج

The chicken embryo is a classical animal model for studying normal embryonic and fetal development and for xenotransplantation experiments to study the ...

Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells

Erythropoiesis is a commonly used model system to study cell differentiation. During erythropoiesis, pluripotent adult human hematopoietic stem cells (HSCs) differentiate into oligopotent progenitors, committed precursors and mature red blood cells 1. This process is regulated for a large part at the level of gene expression, whereby specific transcription factors activate lineage-specific genes while concomitantly repressing genes that are specific to other cell types 2. Studies on transcription factors regulating erythropoiesis are often performed using human and murine cell lines that represent, to some extent, erythroid cells at given stages of differentiation 3-5. However transformed cell lines can only partially mimic erythroid cells and most importantly they do not allow one to comprehensibly study the dynamic changes that occur as cells progress through many stages towards their final erythroid fate. Therefore, a current challenge remains the development of a protocol to obtain relatively homogenous populations of primary HSCs and erythroid cells at various stages of differentiation in quantities that are sufficient to perform genomics and proteomics experiments.
Here we describe an ex vivo cell culture protocol to induce erythroid differentiation from human hematopoietic stem/progenitor cells that have been isolated from either cord blood, bone marrow, or adult peripheral blood mobilized with G-CSF (leukapheresis). This culture system, initially developed by the Douay laboratory 6, uses cytokines and co-culture on mesenchymal cells to mimic the bone marrow microenvironment. Using this ex vivo differentiation protocol, we observe a strong amplification of erythroid progenitors, an induction of differentiation exclusively towards the erythroid lineage and a complete maturation to the stage of enucleated red blood cells. Thus, this system provides an opportunity to study the molecular mechanism of transcriptional regulation as hematopoietic stem cells progress along the erythroid lineage. 
Studying erythropoiesis at the transcriptional level also requires the ability to over-express or knockdown specific factors in primary erythroid cells. For this purpose, we use a lentivirus-mediated gene delivery system that allows for the efficient infection of both dividing and non-dividing cells 7. Here we show that we are able to efficiently knockdown the transcription factor TAL1 in primary human erythroid cells. In addition, GFP expression demonstrates an efficiency of lentiviral infection close to 90%. Thus, our protocol provides a highly useful system for characterization of the regulatory network of transcription factors that control erythropoiesis.

Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells

An ex vivo protocol to generate mature human red blood cells from hematopoietic stem/progenitors is described. Additionally we describe an efficient lentiviral-delivery method to knockdown the transcription factor TAL1 in primary erythroid cells. The efficiency of lentivirus mediated gene delivery is demonstrated using GFP expressing viruses.

Lentiviral بوساطة خلال ضربة قاضية السابقين فيفو تكون الكريات الحمر في الإنسان خلايا الجذعية المكونة للدم

Erythropoiesis is a commonly used model system to study cell differentiation. During erythropoiesis, pluripotent adult human hematopoietic stem cells ...

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.

وبنقل العدوى إلى الإنسان Nucleofecting الجذعية المحفزة المستحثة خلايا

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

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.

إعادة برمجة الخلايا الجسدية البشرية المستحثة إلى الخلايا الجذعية المحفزة (iPSCs) استخدام ناقلات فيروسات الرجعية مع GFP

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