Maintenance of Chicken Embryonic Stem Cells In Vitro
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In this chapter, we describe the methods we have used to show that chicken leukemia inhibitory factor (LIF) maintains chicken
embryonic stem (ES) cells in an undifferentiated state in culture. Recombinant chicken LIF (rchLIF) was expressed as a fusion
protein linked to glutathione S-transferase (GST) and purified to greater than 90% purity in two chro-matography stages, the
first an affinity step using the GST tail, which was cleaved before further purification by gel chromatography. Chicken ES
cells were obtained by culturing chicken blastodermal cells isolated from stage X embryos of freshly laid chicken eggs. These
cells can be maintained in media containing rchLIF for at least 9 d without any other cytokines or feeder cells. Chicken ES
cells were characterized by the expression of alkaline phosphatase activity, stage-specific embryonic antigen (SSEA)-1 and
embryonal carcinoma cell monoclonal antibody-1. In addition, the phosphorylation of signal transducers and acti-vators of
transcription-3 by LIF, which is sufficient to maintain the undifferentiated state of ES cells, was detected by Western blotting
analysis.
Affiliation(s): (2) Laboratory of Immunobiology, Department of Molecular and Applied Biosciences, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
(3) Laboratory of Immunobiology, Department of Molecular and Applied Biosciences, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
(4) Laboratory of Immunobiology, Department of Molecular and Applied Biosciences, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
(3) Laboratory of Immunobiology, Department of Molecular and Applied Biosciences, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
(4) Laboratory of Immunobiology, Department of Molecular and Applied Biosciences, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
Series: Methods in Molecular Biology | Volume: 329 | Pub. Date: Feb-15-2006 | Page Range: 17-34 | DOI: 10.1385/1-59745-037-5:17
Subject: Cell Biology
Key Words: Alkaline phosphatase (AP) - chicken - chicken blastodermal cells (CBC) - embryonic stem (ES) cells - leukemia inhibitory factor (LIF) - stage-specific embryonic antigen (SSEA)-1 - signal transducers and activators of transcription-3 (STAT3)
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