Seasonal changes in spermatogenic cell degeneration in the seminiferous epithelium of adult Japanese macaques (Macaca fuscata fuscata)
Seasonal changes in spermatogenic cell degeneration in the seminiferous epithelium of adult Japanese macaques (Macaca fuscata fuscata)
复制标题
成年日本猕猴生精上皮生精细胞变性的季节性变化
作者：
T. Enomoto;K. Matsubayashi;Y. Nagato;M. Nakano
研究了日本猕猴生精管中生精细胞的退化模式，以阐明日本猕猴生殖性能的季节变化与细胞学结果之间的关系。在光镜下，取自4月(非交配季节)和10月(交配季节)的5只成年动物的睾丸标本。对于电子显微镜，使用了另外四只猕猴的样本。在精子发生的各个阶段均可见退化细胞。在生精上皮周期的第I~V期，非交配季节和交配季节分别有14.7%和10.0%的细胞出现形态不典型的粗线型精母细胞，但比例差异不显著。非交配季节具有非典型特征的成熟精细胞占59.6%，交配季节显著减少至34.1%。这些结果表明，精子产量的季节性变化至少部分地与该物种生精细胞的退化过程有关。
The degenerating pattern of spermatogenic cells in the seminiferous tubule of Japanese macaques was studied to clarify a relationship between seasonal changes of reproductive performances and cytological findings in the Japanese macaque. For light microscopy, testis samples were obtained from five adult animals by biopsy in April (nonmating season) and October (mating season). For electron microscopy, specimens from four additional macaques were used. Degenerating cells were found in all steps of spermatogenesis. In stages I to V of the cycle of the seminiferous epithelium, morphologically atypical pachytene spermatocytes were observed in 14.7 and 10.0% of the cells in the nonmating and mating seasons, respectively, although the difference in percentage was not significant. Mature spermatids with atypical features in those stages occupied 59.6% of the cells in the nonmating season, which significantly decreased to 34.1% in the mating season. These results imply that the seasonal change of sperm production is related, at least in part, to the process of degeneration of the spermatogenic cells in this species.