Summary
Mechanisms of the inhibition of growth of mammalian cell cultures caused by mycoplasmal infection were investigated by using cell-free extracts of 14 species of mycoplasmas. In four mammalian cell lines tested, the growth of two cell lines, FM3A and MDCK, was inhibited by the extracts of arginine-utilizing mycoplasmas, whereas that of the other two cell lines, Vero and LLC-MK2, was not inhibited by extracts of either arginine- or glucose-utilizing mycoplasmas. These results suggest that there are two types of cell cultures, one susceptible and the other insusceptible to arginine-utilizing mycoplasmas.
In a series of experiments using FM3A cells, it was found that the growth inhibition caused by the extracts of arginine-utilizing mycoplasmas was due to removal of arginine from the medium by the action of arginine deiminase present in the extracts and that none of the metabolic products of arginine had any effect on the growth. A highly positive correlation (r=0.96,P<0.01) was observed between the activity of arginine deiminase and the growth-inhibiting activity of extracts of arginine-utilizing mycoplasmas.
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Sasaki, T., Shintani, M. & Kihara, K. Inhibition of growth of mammalian cell cultures by extracts of arginine-utilizing mycoplasmas. In Vitro 20, 369–375 (1984). https://doi.org/10.1007/BF02619581
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DOI: https://doi.org/10.1007/BF02619581