Abstract
ABSTRACT The germinal epithelium of the adult testis is susceptible to radiation induced damage. Amifostine is a drug used to prevent the side effects of radiotherapy (RT) and chemotherapy. We investigated the protective role of amifostine against RT induced damage to rat testis using the TUNEL assay. We used adult male rats divided equally into four groups: untreated control group; amifostine group, 200 mg/kg amifostine/day for 3 days; RT-saline group, 2 Gy/day local irradiation of testes for 3 days; RT-amifostine group, 2 Gy/day local irradiation of testes for 3 days plus 200 mg/kg amifostine 30 min before each irradiation. Four weeks after treatment, rats were sacrificed for histological examination and apoptosis was assessed using the TUNEL method. The TUNEL staining density was obtained by evaluating separate seminiferous tubules selected randomly from each section using the stereological fractionator method. Apoptosis in the seminiferous tubules in the control group and amifostine groups were evaluated as spontaneous. Frequent apoptosis was observed in the RT-saline group; a statistically significant difference was observed between the RT treated and untreated groups. Administration of amifostine 30 min before RT protected the testicular germ cells against apoptosis.
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