Shoutai pills improve the quality of oocytes exposed to the chemotherapeutic drug Hydroxyurea.

Hydroxyurea (HU), a DNA synthesis inhibitor, is one of the most common chemotherapeutic drugs that have been widely applied to treat a variety of cancers. HU treatment exhibits severe side effects including renal toxicity, skin toxicity and embryo-toxicity. However, the influence of HU on the female gamete development has not yet fully clarified. Here, we found that HU exposure induced the degeneration of activated follicles after primordial follicle stage, resulting in the depletion of the ovarian reserve. HU exposure also led to the oocyte meiotic maturation arrest via disrupting normal spindle assembly, chromosome alignment and kinetochore-microtubule attachment. Furthermore, exposure to HU impaired the dynamics of ovastacin and Juno, two critical fertilization regulators. Notably, we illustrated that Shoutai pills (STP), a traditional Chinese medicine drug that has been commonly used for the treatment of miscarriage in China, partially restored all of the defects of oocyte development resulting from HU exposure through inhibiting the occurrence of oxidative stress-induced apoptosis. Taken together, our data not only reveal the adverse impact of HU exposure on the female gamete development, but also provide an effective strategy to prevent it, potentially contributing to the improvement of the quality of oocytes from patients treated with HU.