Related Experiment Video
Updated: Aug 20, 2026
Intestinal Epithelial Regeneration in Response to Ionizing Irradiation
Published on: July 27, 2022
The myeloprotective effect of medroxyprogesterone acetate in an irradiated animal model
Binnaz Celebioglu Sarper1, Cengiz Kurtman, M Kemal Ozbilgin
1Department of Radiation Oncology, Kocaeli University Medical Faculty, Ankara University, Turkey. celbil@kou.edu.tr
Background:
In this study we evaluated the effect of medroxyprogesterone acetate (MPA) and its major ingredients on protection of the hematopoietic organs against radiation damage.
Method:
One group of mice was given saline as placebo and the other groups were given MPA. Mice were injected with MPA (10 mg/kg) or saline 10 days before or after a single 8 Gy whole body cobalt irradiation. On day 14 the mice were sacrificed and their bone marrow transplanted to recipient mice. Ten days after the transplantation, spleen colony formation was investigated in mice.
Results:
Administration of MPA with irradiation increased the formation of the spleen colony. Statistically significant enhancement of the spleen colony formation was found in mice treated with MPA repeatedly, as compared with those treated with placebo (P < 0.001). No significant difference in Spleen Colony Forming Unit (CFU-S) numbers was observed between pre-and post-radiotherapy administration of MPA (P = 0.216).
Conclusion:
It is an important observation that no significant difference was observed in CFU-S numbers between pre- and post-irradiation administration of MPA.
Insights
Medroxyprogesterone acetate (MPA) enhances spleen colony formation after radiation exposure in mice. Repeated MPA treatment significantly boosted spleen colony formation, with no difference between pre- and post-irradiation administration.
Area of Science:
- Hematology
- Radiation Biology
- Pharmacology
Background:
- Radiation exposure can damage hematopoietic organs.
- Medroxyprogesterone acetate (MPA) is evaluated for its protective effects.
- The study investigates MPA's impact on radiation-induced damage.
Purpose of the Study:
- To assess the radioprotective potential of medroxyprogesterone acetate (MPA).
- To determine the effect of MPA on hematopoietic organ protection against radiation.
- To compare the efficacy of MPA administration before and after irradiation.
Main Methods:
- Mice received MPA (10 mg/kg) or saline placebo.
- MPA or saline was administered 10 days before or after 8 Gy whole-body irradiation.
- Bone marrow transplantation and spleen colony formation (CFU-S) assays were performed.
Main Results:
- MPA administration increased spleen colony formation post-irradiation.
- Repeated MPA treatment significantly enhanced spleen colony formation compared to placebo (P < 0.001).
- No significant difference in CFU-S numbers was found between pre- and post-irradiation MPA administration (P = 0.216).
Conclusions:
- MPA demonstrates radioprotective effects on hematopoietic organs.
- The timing of MPA administration (pre- vs. post-irradiation) did not significantly alter CFU-S numbers.
- MPA is a potential agent for mitigating radiation-induced damage to the hematopoietic system.
