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There are several examples of immortalised cell lines, each with different properties. Most immortalised cell lines are classified by the cell type they originated from or are most similar to biologically 3T3 cells – a mouse fibroblast cell line derived from a spontaneous mutation in cultured mouse embryo tissue.
A stem-cell line is distinctly different from an immortalized cell line, such as the HeLa line. While stem cells can propagate indefinitely in culture due to their inherent properties, immortalized cells would not normally divide indefinitely but have gained this ability due to mutation. Immortalized cell lines can be generated from cells ...
The degree of HeLa cell contamination among other cell types is unknown, because few researchers test the identity or purity of already established cell lines. It has been shown that a substantial fraction of in vitro cell lines are contaminated with HeLa cells; estimates range from 10% to 20%.
Thus, all research on endothelium- or megakaryocyte-specific functions utilizing these cell lines has been misguided. There are two principal ways in which a cell line can become contaminated: cell cultures are often exchanged between research groups; if, during handling, a sample is contaminated and then passed on, subsequent exchanges of ...
Besides the culture of well-established immortalised cell lines, cells from primary explants of a plethora of organisms can be cultured for a limited period of time before senescence occurs (see Hayflick's limit). Cultured primary cells have been extensively used in research, as is the case of fish keratocytes in cell migration studies. [88 ...
Its scope includes immortalised cell lines, naturally immortal cell lines (example: embryonic stem cells) and finite life cell lines when those are distributed and used widely. The Cellosaurus provides a wealth of manually curated information; for each cell line it lists a recommended name, synonyms and the species of origin.