A. Fein et al., THE EFFECT OF CYCLOPHOSPHAMIDE ON RAT BLASTOCYSTS IN-VITRO AND THEIR SUBSEQUENT DEVELOPMENT FOLLOWING TRANSFER TO PSEUDOPREGNANT RATS, Israel journal of medical sciences, 32(2), 1996, pp. 129-134
These investigations were undertaken to assess the effects of cyclopho
sphamide (CPA) on rat blastocysts. In the first set of experiments, bl
astocysts were exposed to 100 mu g/ml CPA in culture for 48 h. In the
second experiment, blastocysts were cultured for 48 h following inject
ion of 20 or 40 mg/kg of CPA to pregnant rats on day 4 of gestation. I
n the third experiment, blastocysts were cultured for 2 h in the prese
nce of 100 mu g/ml of CPA and then transferred to pseudopregnant rats.
The results from the first experiment revealed a clear toxic effect o
f CPA on blastocysts following culture. A similar effect occurred when
blastocysts were harvested and cultured following in vivo injections
of CPA. In the third experiment a clear embryotoxic effect (larger num
ber of resorptions and retarded embryos in comparison to control) was
found on day 13 of gestation. The origin of activation of CPA by the b
lastocysts could not be ascertained from the above results.