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Protection of spermatogenesis against gamma ray-induced damage by granulocyte colony-stimulating factor in mice

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The radioprotective effects of granulocyte colony-stimulating factor (GCSF) were further investigated with respect to the testicular system. Recombinant human GCSF (100 μg kg−1 body weight/day) was administrated to male C3H/HeN mice by subcutaneous injection for three consecutive days before pelvic irradiation (5 Gy) and histopathological parameters were assessed at 12 h and 21 days post-irradiation (pi). The GCSF protected the germ cells from radiation induced- apoptosis (P < 0.01 vs. irradiated group at 12 h pi). GCSF remarkably attenuated radiation-induced reduction in testis weight, seminiferous tubular diameter, seminiferous epithelial depth and sperm head count in the testes (P < 0.05 versus irradiated group at 21 days pi). Repopulation index and stem cell survival index of the seminiferous tubules were increased in the GCSF-treated group when compared with the radiation group (P < 0.01). The frequency of abnormal sperm in the GCSF group was lower than that in the irradiated group at 21 days pi (P < 0.01). The decrease in the sperm count and in sperm liability in the epididymis caused by irradiation was counteracted by GCSF. The present study suggests that GCSF protects from radiation-induced testicular dysfunction via an anti-apoptotic effect and recovery of spermatogenesis.
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Keywords: Apoptosis; granulocyte colony-stimulating factor; irradiation; sperm

Document Type: Research Article

Affiliations: 1:  Laboratory of Experimental Pathology, Korea Institute of Radiological & Medical Sciences (KIRAMS), Seoul, South Korea 2:  Department of Veterinary Anatomy, College of Veterinary Medicine and Veterinary Medical Research Center, Chonnam National University, Gwangju, South Korea

Publication date: April 1, 2011

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