This test is designed to detect irreversible toxic effects on both cell growth and survival, by the evaluation of colony-forming (CF) efficiency, in hepatoma cell lines derived from man, rat and mouse. - [Read Hepatoma Cell Cultures as In Vitro Models for Hepatotoxicity]
Cultivating animal cells in the laboratory is an indispensable technique for cell biologists. However, most normal primary cell lines, while faithfully reproducing the phenotype of their tissue of origin, do not grow indefinitely in culture. After a series of population doublings (the number of which varies by species, cell type, and culture conditions) primary cells enter a state where they no longer divide. - [Read Immortalization of Cells in Culture]
Isolation of poly A+ RNA from Total RNA by Oligo(deoxythymidine)cellulose Chromatography. Total RNA is first isolated from the tissues or cells and then mRNA is isolated by PolyA+ selection using oligo(dT) cellulose. This is necessary for all tissue sources rich in RNase (and cell lines). Lazo Lab - [Read Isolation of poly A+ RNA from Total RNA by Oligo(deoxythymidine)cellulose Chromatography]
Insect cell cultures are now commonly used in insect physiology, developmental biology, pathology, and molecular biology. As the field has advanced from methods development to a standard procedure, so has the diversity of scientists using the technique. This paper describes methods that are effective for maintaining various insect cell lines. The procedures are differentiated between loosely or non-attached cell strains, attached cell strains, and strongly adherent cell strains. - [Read Methods for Maintaining Insect Cell Cultures]
One of the most important, but frequently overlooked, cell culture procedures is testing cultures for microbial contamination, especially mycoplasma. It is critical for every cell culture laboratory to only use cell lines that have been
carefully screened for mycoplasma. Fortunately, there is a simple fluorochrome DNA staining test that can detect both mycoplasma and virtually any other prokaryote contaminants. - [Read Mycoplasma Detection Using DNA Staining Protocol]
Protocol describes transfection of plasmid DNA into mammalian cell lines using electroporation, a process whereby external application of electric pulses induce cell membrane permeability. Cells in suspension and small volume cells are difficult to transfect, whereas adherent cells and large volume cells are relatively easy. Regardless of cell size or phenotype, transfection efficiency increases with a high concentration of cells in a small volume. - [Read Optimizing Electrotransfection of Mammalian Cells In Vitro Protocol]
Protocol describes transfection of plasmid DNA into mammaliancell lines using electroporation, a process whereby externalapplication of electric pulses induce cell membrane permeability.A number of factors can affect electrotransfection efficiency.In general, cells in suspension and small volume cells are difficultto transfect, whereas adherent cells and large volume cellsare relatively easy. - [Read Optimizing Electrotransfection of Mammalian Cells In Vitro Protocol]
Remove medium from culture container, rinse with PBS, expose cells to trypsin, incubate, stop trypsin activity by adding serum containing medium, dissociate cells, dilute and
return to incubator. - [Read Passage of Adherent Cell Lines (subculture).]
MEF feeders are prepared weekly to provide a substrate for undifferentiated embryonic stem (ES) cells. Primary MEF cells are thawed, established in culture, treated with mitomycin C to halt their proliferation so they cannot overgrow the ES cultures, and then replated onto dishes convenient for ES cell culture. This protocol can also be used to prepare feeder cells from STO fibroblast cell lines. - [Read Preparation of Mouse Embryonic Fibroblast (MEF) Feeder Plates Protocol]
This protocol is optimized for erythroid cells, other cell types may require modifications. - [Read Protocol for Stable Lines]
Quality Control Considerations for Cell Culture- http://www.sigmaaldrich.com/Area_of_Interest/Life_Science/Cell_Culture/Key_Resources/ECACC_Handbook/Cell_Culture_Techniques_9.html#Quality%2520Control
Quality is important in all aspects of tissue culture since the quality of materials used i.e. media and other reagents) will affect the quality of the cultures and products derived from them. The main areas of quality control that are of concern for tissue culture are: The quality of the reagents and materials; The provenance and integrity of the cell lines; The avoidance of microbial contamination. - [Read Quality Control Considerations for Cell Culture]
Quality Control Considerations for Cell Culture- http://www.sigmaaldrich.com/Area_of_Interest/Life_Science/Cell_Culture/Key_Resources/ECACC_Handbook/Cell_Culture_Techniques_9.html#Quality%20Control
Quality control considerations for cell culture. Includes: Provenance and Integrity of Cell Lines; Avoidance of Microbial Contamination; Environmental Monitoring; What to do in the event of contamination; - [Read Quality Control Considerations for Cell Culture]
A powerful way to identify a mutation in the gene of interest and to test mutant plants for phenotypes that are predicted to result from loss of function of that gene is by PCR screening. Pools of insertion lines are screened using one primer corresponding to the gene of interest and one primer corresponding to the end of the insertion element. The synthesis of a product indicates the presence of an insertion in the gene of interest. - [Read Screening DNA Pools for T-DNA Insertions in Arabidopsis Genes Protocol]
Protocol uses an autoregulatory system in which the transcriptional trans-activator tTA drives its own expression and that of a target gene. The first stage of the procedure describes how to generate stable lines of NIH-3T3 cells that express either tTA alone or tTA and the tetracycline-regulated target gene. - [Read Tetracycline as Regulator of Inducible Gene Expression Protocol]
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.