Histological changes in the regressing reproductive organs of sexually mature male and female Japanese quail.
Histological changes in the regressing reproductive organs of sexually mature male and female Japanese quail.
复制标题
性成熟雄性和雌性日本鹌鹑生殖器官退化的组织学变化。
DOI：
10.1095/biolreprod11.2.168
复制
发表时间：
1974
影响因子：
3.6
通讯作者：
W. Wilson
中科院分区：
文献类型：
--
作者：
V. Eroschenko;W. Wilson
日光照周期从每24小时16个减少到6个，会导致性成熟日本鹌鹑输卵管和卵巢加速退化(退化)。产卵停止后不久取输卵管切片，组织学检查显示，整个表面上皮细胞体积缩小，枕大部和峡部的分泌活动停止。管状腺细胞的大小减小和明显变性与枕大部、峡部和子宫结缔组织的增殖增加有关。与管状腺细胞密切相关的大量包涵体是退化的枕大部的特征，而峡部和子宫中可见充满细胞碎片和变性细胞的大管腔。退行性卵巢组织的特征是结缔组织增多和各种形式的卵泡闭锁，尽管初级卵母细胞和小卵泡仍然是一个恒定的特征。大部分睾丸出现退化(退化)的迹象，主要是在光照减少后10天。生精小管充满坏死碎片和脂肪生成增加是与睾丸退变相关的特征(退化)。光疗4周后，大多数脂肪样生精管清除了坏死性碎屑，基本上含有单层生发上皮。这些结果表明，在光周期减少4wk后，雌雄生殖器官在组织结构上与未成熟发育阶段的器官相似。
A reduction of daily photoperiod from 16 to 6 per 24 h induced accelerated involution (regression) of the oviducts and ovaries in sexually mature Japanese quail. Sections taken from the oviduct shortly after cessation of egg laying, when examined histologically, indicated reduced cell size of the entire surface epithelium and cessation of secretory activity in the magnum and isthmus sections. Reduction in the size and apparent degeneration of the tubular gland cells was associated with an increased proliferation of the connective tissue in the magnum, isthmus, and uterus. Massive inclusions closely associated with the tubular gland cells characterized the regressing magnum, whereas large lumina filled with cellular debris and degenerating cells were seen in the isthmus and uterus. Regressing ovarian tissue was characterized by increased connective tissue and various forms of follicular atresia although primary oocytes and small follicles remained a constant feature. Signs of involution (regression) were seen in the majority of the testes, primarily, 10 days after light reduction. Seminiferous tubules filled with necrotic debris and increased steatogenesis were features associated with testicular involution (regression). Four weeks after light reduction, the majority of the lipoidal seminiferous tubules were cleared of necrotic debris and contained essentially a single layer of germinal epithelium. These results indicate that after 4 wk of decreased photoperiod the reproductive organs of both sexes were histologically similar to the organs during the immature stages of development.