Studies on the new cell line TT-I: viral susceptibility and chromosomal changes related to mycoplasma contamination.

For understanding some biological properties of TT-1 cell line established in our laboratory in 1962, its viral susceptibility and the changes in chromosomes related to mycoplasma contamination were studied. TT-1 cells were susceptible to the infection of picorna (Polio type 1, Coxsackie B1 and Echo type 2), measles, Newcastle disease, herpes simplex (type 1), adeno (type 12) and vaccinia viruses. Contamination of TT-1 cells with Mycoplasma hominis was treated successfully with bottromycin A2 (50 microgram/ml). The chromosomes of the cells ranged from 52 to 55 in number and two additional minute chromosomes were found in the cells contaminated with the mycoplasma. However, after treatment with bottromycin, these two minute chromosomes disappeared.