Annual Report of the Institute of Experimental Medicine of the AMN SSSR
- L. I. Chekulaeva
- Vilnius, 529-537
The authors studied the physiological regeneration of skin epidermis on the back and of the hair at the early stages of postnatal development (in newborns and 5–10-day old animals) by the autoradiographic method, by the movement of the cells with incorporated radiosulphur in the epithelial stratum and the shaft of the hair. Different velocity of physiological regeneration of the epithelium was established: in newborns it equals about 8 μ per 24 hours and in 5–10-day-old animals — 5 μ. Beginning from the 6th day of life the velocity of physiological regeneration of the epithelium drops, which corresponds to the decrease of the thickness of the horny layer and hair growth. On the contrary, an increase of the growth velocity is noted in the hair after birth. Thus, in the newborn rats the velocity of growth equals 150 μ per 24 hours, while in 10-day-old rats it averaged 500 μ. The intensity of protein metabolism in various layers of the epithelial stratum was studied simultaneously.