Abstract
Cancer survivors may experience long-term adverse effects of cancer treatments such as premature ovarian failure and infertility. We aimed to investigate the potential effects and toxicity of bortezomib (BTZ) as an effective anticancer drug on ovaries, raise awareness to the negative consequences of the treatment, and help increase the quality of life after treatment. Mice were distributed into bortezomib (BTZ1, BTZ2) and saline-injected control groups (C1, C2) at a dose of 1 mg/kg twice per week for 6 weeks. We sacrificed C1, BTZ1 groups at day 1 and C2, BTZ2 groups at 4 weeks after the last injection. Ovary samples were examined using histopathological and immunohistochemical methods. Ovarian follicle impairment was detected on BTZ-treated mice and was associated with a statistically significant decreased population of primordial and antral follicles compared with control groups. In experimental groups, Caspase-3 and Ki67 expressions were increased, whereas estrogen receptor alpha (ERα) and progesterone receptor (PR) expressions were decreased in various developmental stages of follicles. BTZ specifically targets granulosa cells by inducing granulosa cell apoptosis and may have long-term effects on follicles. Bortezomib treatment may adversely affect ovarian function by accelerating ovarian reserve depletion and changing ERα and PR hormone levels that can cause fertility problems in the long term.
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