Ultrastructural features of goat oviductal secretory cells at follicular and luteal phases of the oestrous cycle
Autor: | Hiroyuki Abe, Takeshi Satoh, Hiroyoshi Hoshi, Masakazu Onodera, Shichiro Sugawara |
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Rok vydání: | 1999 |
Předmět: |
endocrine system
medicine.medical_specialty Histology Biology Luteal phase Cytoplasmic Granules Exocytosis Estrus Internal medicine Follicular phase medicine Animals Secretion Molecular Biology Fallopian Tubes Ecology Evolution Behavior and Systematics Goats Cell Biology Epithelium Cell biology Microscopy Electron Endocrinology medicine.anatomical_structure Follicular Phase Cytoplasm Ultrastructure Oviduct Female Anatomy Research Article Developmental Biology |
Zdroj: | Journal of Anatomy. 195:515-521 |
ISSN: | 1469-7580 0021-8782 |
Popis: | The aim of the present study was to investigate the ultrastructure of secretory cells in the various regions of the goat oviduct during the follicular and luteal phases of the oestrous cycle. During the follicular phase in the fimbriae, the secretory cells contained small secretory granules with electron-dense matrices. In the luteal phase, the secretory granules disappeared and cytoplasmic protrusions, extending beyond the luminal border of the ciliated cells and often containing the nucleus, were predominant. During the follicular phase in ampullary secretory cells, numerous secretory granules with moderately electron-dense matrices were present in the supranuclear cytoplasm and exocytosis of secretory granules was observed. The number of secretory granules was dramatically reduced in the ampullary secretory cells at the luteal phase. Conspicuous cytoplasmic protrusions of secretory cells were observed similar to those of the fimbrial epithelium. Isthmic cells were almost free of secretory granules and lysosome-like bodies were found both at the follicular and luteal phases. In conclusion, our ultrastructural observations of goat oviduct revealed marked cyclic changes in the ultrastructural features of secretory cells and the ultrastructural features and the numbers of secretory granules were distinctive for each particular segment. |
Databáze: | OpenAIRE |
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