Doxorubicin-induced female reproductive toxicity: an assessment of ovarian follicular apoptosis, cyclicity and reproductive tissue histology in Wistar rats.

Doxorubicin is a widely used chemotherapeutic agent for various cancers, particularly for the female breast cancer patients. Although the rate of young female cancer patients is increasing every year, conversely the lack of knowledge of adverse effects of doxorubicin on female reproductive system insisted us to assess the toxic effects of doxorubicin on the female reproductive tissue histoarchitecture, cyclicity, and mammary glands in Wistar rats. The rats were divided into two groups depending on the treatment period, i.e., 24h and 28d and further subdivided into three subgroups and administered with doxorubicin at 3mg/kg bw (subgroup I), 6mg/kg bw (subgroup II), and equal volume of normal saline (subgroup III) intraperitoneally once during the whole treatment period. We observed a significantly altered estrous cycle with a prolonged diestrous and short proestrous in higher dose group and dose-dependent significant changes in the uteri and mammary gland histoarchitecture in 28 days treated rats as compared to control. Moreover, the micronuclei and chromosomal aberration frequency were increased significantly in both treatment groups. A significant increase in follicular atresia in ovaries of the 28days treated rats was observed. The immunohistochemical analysis of ovarian tissues showed an increased p53 and caspase 3 expression and apoptosis in primordial follicles of treated rats. The results suggest that though doxorubicin is a potential chemotherapeutic drug for many tumors, but the risk of adverse effects on the female reproductive system is there even at low doses.