The mole rats were divided into control and test groups. Group I was separated as the control, and was not received any radiation. Taking into account of sunlight period, the other groups were exposed to artificial UVC radiation for 8 h daily (between 08.00 and 17.00 h). A feeding interval was given at midday for 1 h. A timer was used to standardize UVC exposure times. Group II was irradiated for 14 days (Total dosage was 564,48 J/cm2) and Group III was irradiated for 28 days (Total dosage was 1.128,96 J/cm2).