[Growth kinetics of HeLa tumor cells during subculturing after irradiation with low-intensity red light in the stationary growth phase].

The curves of relative growth rate of HeLa cells were studied after their irradiation at the stationary growth phase (He-Ne laser, lambda = 632.8 nm, D = 100 J/m2) and reinoculation to the fresh medium in different periods after the irradiation. The irradiation evokes changes in cells of the stationary phase which are realized in subcultivation. When the interval between irradiation and inoculation is short (5 min), the cell growth is inhibited; when the interval becomes longer (up to 4 h), the cell growth in the exponential phase increases. In the HeLa cell culture with the stimulated growth only a part of cells are able, to reach the stationary growth phase.