RESUMEN
Objective To establish a rat xenograft model of human uterine leiomyoma using immunosuppressive a-gent and provide a useful tool for the study on uterine leiomyoma. Methods Intragastric administration with immunosup-pressive agent mycophenolate mofetil(MMF)(40 mg/kg)was given to rats for two weeks before the surgery until the end of the experiment. 20 SPF female Wistar rats were randomly divided into 4 groups after abdominal transplantation of human leiomyoma tissues:group A received femoston containing 0.4 mg/kg estradiol and 2 mg/kg dydrogesterone, group B re-ceived estadiol 0.4 mg/kg,group C received dydrogesterone 2 mg/kg,and group D served as the control group, received distilled water 1 mL/200 g. All rat received the corresponding drugs once per day for 2 days. Samples were taken at 4 weeks after the surgery to observe the pathology of the tumor tissues. Results The modeling success rates were 90% in the group A,40 % in the group B,and 0% in the groups C and D. Conclusions Rat xenograft model of human leiomyoma can be successfully established using an immunosuppressive agent femostone with a high modeling success rate and low cost. It can be used as a new animal model for the study of transplanted leiomyoma.
RESUMEN
Objective To observe the changes in estrous cycle and vaginal smears in ovarectomized NOD/SCID mice.Methods To continuously observe the estrous cycle time by vaginal smears of NOD/SCID mice in consecutive nine days, twice daily.After ovariectomy, the changes of estrous cycle were observed by vaginal smears for 7 days.Results The estrous cycle in NOD/SCID mice was 4-6 days.Regular estrous mice accounted for 80%.There was no significant correlation between vaginal opening and estrous cycle status.After ovariectomy, the vaginal smears showed characteristics of metestrus or diestrus.Conclusions Vaginal smear cytology can be used to determine the estrous cycle and characteris-tics of NOD/SCID female mice.The ovariectomized operation of NOD/SCID female mice is effective.