Goyal H O
Am J Vet Res. 1982 May;43(5):785-90.
Light microscopic and ultrastructural observations were made in the bull rete testis and the ductuli efferentes with emphasis on the presence of sperm in the epithelium. Phagocytosed sperm in various stages of degeneration were found in the epithelial cells lining the rete testis and in the nonciliated cells of the ductuli efferentes. Phagocytosis was more prevalent in the rete testis than in the ductuli efferentes. Besides the epithelial cells, degenerating sperm components and residual bodies were in the luminal macrophages of the rete testis. The degeneration of sperm heads presumably progressed in the following order: (i) disruption of the cell membrane, (ii) aggregation of small vesicles, probably of Golgi origin, between the disrupted cell membrane and an outer acrosomal membrane, (iii) loss of the acrosomal matrix, and finally (iv) disintegration of the nuclear chromatin. These degenerative changes probably resulted from increased lysosomal activity of phagocytosing cells. The possible importance and causes of spermiophagy are discussed.
对公牛睾丸网和输出小管进行了光镜和超微结构观察，重点观察上皮中精子的存在情况。在睾丸网内衬的上皮细胞和输出小管的无纤毛细胞中发现了处于不同退化阶段的被吞噬精子。吞噬作用在睾丸网中比在输出小管中更普遍。除上皮细胞外，退化的精子成分和残余体存在于睾丸网的管腔巨噬细胞中。精子头部的退化大概按以下顺序进行：（i）细胞膜破裂，（ii）在破裂的细胞膜和顶体外膜之间聚集小泡，可能起源于高尔基体，（iii）顶体基质丢失，最后（iv）核染色质解体。这些退化变化可能是由于吞噬细胞溶酶体活性增加所致。讨论了精子吞噬的可能重要性和原因。
