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  • Title: Delta-ray-induced reciprocal translocations in spermatogonia of the crab-eating monkey (Macaca fascicularis).
    Author: Matsuda Y, Tobari I, Yamagiwa J, Utsugi T, Kitazume M, Nakai S.
    Journal: Mutat Res; 1984 Dec; 129(3):373-80. PubMed ID: 6513964.
    Abstract:
    The yield of translocations induced by delta-rays in the crab-eating monkey (Macaca fascicularis) spermatogonia were studied by cytological analysis in spermatocytes derived from them. The frequencies of translocations were 0.09% at 0 Gy, 1.9% at 1 Gy, 2.5% at 2 Gy and 1.3% at 3 Gy, showing a humped dose-response curve with a peak yield around 2 Gy. No remarkable inter-seasonal or inter-animal variations in the induction of translocation were observed. The frequencies in the crab-eating monkey were significantly higher than those in the same Macaca genus, the rhesus monkey (Macaca mulatta) (van Buul, 1976, 1980). This inter-species difference in radiosensitivity might be affected by the condition of spermatogonial stem cells at the time of exposure to radiation, depending on the seasonal change in spermatogenetic activity.
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