The display of microtubules in transformed cells
- PMID: 200367
- DOI: 10.1016/0092-8674(77)90257-4
The display of microtubules in transformed cells
Abstract
Monospecific tubulin antibodies have been used in indirect immunofluorescence microscopy on a variety of well characterized, transformed cell lines grown in tissue culture. Networks of colcemid-sensitive fibers are seen in SV40-transformed 3T3 cells, SV40-transformed rat embryo cells, HeLa cells and other transformed cell lines. In each case, greater than 90% of the cells contain visible microtubular networks, and where individual microtubules can be distinguished, they run for long distances. Documentation of these metworks is more difficult in transformed than in normal cells, because transformed cells are in general more rounded and have less well spread cytoplasm. In addition, the microtubular networks can be readily visualized in "cytoskeletons" of both normal and transformed cells, obtained by treatment of cells with nonionic detergents in a buffer which stabilizes microtubules in vitro. Addition of calcium to this buffer results in in situ fragmentation and destruction of the microtubular network. In view of these results, we conclude that transformed cells contain significant numbers of microtubules, and that in transformed cells, as in normal cells, microtubules are arranged in networks.
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