This protocol describes the preparation of feeder cells from MEF cells or from the STO mouse fibroblast cell line. The cells are rendered mitotically inactive by treatment with {gamma}-irradiation. The feeder layers can then be used to maintain embryonic stem (ES) cells in the undifferentiated state. - [Read Preparing Feeder Cell Layers from STO or Mouse Embryo Fibroblast (MEF) Cells Protocol]
This protocol describes the preparation of mouse embryo fibroblasts (MEFs), which can then be used as feeder cells to maintain embryonic stem (ES) cells in the undifferentiated state. - [Read Preparing Mouse Embryo Fibroblasts Protocol]
Protocol describes a method for preparing siliconized pipettes. Such pipettes minimize the loss of embryos or embryonic tissues during transfer. - [Read Preparing Siliconized Pipettes Protocol]
This protocol describes the culture of embryonic stem (ES) cells using mitotically inactivating primary mouse embryonic fibroblast (MEF) cells as a feeder layer (preparation described in Preparation of Mouse Embryonic Fibroblast (MEF) Feeder Plates). The ES culture medium is supplemented with recombinant leukemia inhibitory factor (LIF) to help maintain the cells as pluripotent stem cells. This protocol has been optimized for the ES-D3 cell line. - [Read Propagation of Pluripotent Mouse Embryonic Stem (ES) Cells Protocol]
This protocol describes the culture of embryonic stem (ES) cells using mitotically inactivating primary mouse embryonic fibroblast (MEF) cells as a feeder layer (preparation described in Preparation of Mouse Embryonic Fibroblast (MEF) Feeder Plates). The ES culture medium is supplemented with recombinant leukemia inhibitory factor (LIF) to help maintain the cells as pluripotent stem cells. This protocol has been optimized for the ES-D3 cell line. - [Read Propagation of Pluripotent Mouse Embryonic Stem (ES) Cells Protocol]
Protocol describes a useful way to observe the development of embryos, as well as meristems & young primordia developing at the shoot apex by confocal microscopy after staining the nuclei with propidium iodide. The number of cells can be exactly quantified in a meristem or in young primordia. Because embryonic & meristematic cells are largely filled out by their nuclei, it is easier to image only the nuclei. This method allows analysis of whole-mount material, which is more easily reconstructed. - [Read Protocol for Nuclear Staining of Plants for Confocal Microscopy]
To image early cleavages and chromatin dynamics, it is convenient to use histone H2B fused to GFP or lamin::GFP. Time-lapse movies can be obtained using conventional confocal microscope systems and their included software. Early embryos dissected from transgenic hermaphrodites are placed with egg salts on agar pads. Chromatin dynamics can be followed easily, and wild-type embryonic cells can be compared with mutants or RNAi-treated embryos. - [Read Protocol Live Imaging of Caenorhabditis Elegans]
Includes protocols: Mouse Embryonic Fibroblasts (MEF) Preparation; Harvesting MEFs; Cryopreservation of MEFs; Thawing and maintaining MEFs; Irradiating & Plating MEFs; Culture of Human ES cells with Matrigel® and Conditioned
Medium; Preparation of Conditioned Medium (CM); Preparation of Matrigel® -coated plates; Passage of human ES cells on Matrigel®; Daily maintenance of feeder-free culture; Freezing Human ES Cells; Thawing Human ES cells; Formation of Embryoid Bodies; - [Read Protocols for the Maintenance of Human Embryonic Stem Cells in Feeder Free Conditions]
Human embryonic stem cells are a valuable resource for research and cell replacement therapy but are notoriously cumbersome to culture. Bhatia and colleagues show that an increased dose of basic fibroblast growth factor eliminates the need for feeder laye - [Read Simplifying hESC culture]
Tissue subcellular fractionation and protein extraction for use in mass-spectrometry-based proteomics. Although many methods exist for fractionating proteins, the method described here can capture the majority of subcellular fractions simultaneously at reasonable purity. The scalability of this method makes it amenable to small samples, such as embryonic tissues, in addition to larger tissues. The protocol described is for the general fractionation and extraction of proteins from organs / tissue - [Read Tissue subcellular fractionation and protein extraction for use in mass-spectrometry-based proteomic]
This protocol a protocol on how to generate transfected embryonic stem (ES) cell clones. The previous protocol in this series is the Protocol for Electroporation of ES cells. The next protocol in the series is the Protocol on Disaggregation, Expansion, and Freezing of Transfected ES Clones.
The protocol gives general considerations for the design of targeting vectors for transgenic mice. The protocol shares tips in the design of knock-out and knock-in vectors and some of their strategies for producing homologously recombined embryonic stem cells.