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- W1569642625 abstract "The purpose of the current investigation was to ascertain whether medaka oocytes rotate within the follicle. Isolated medaka follicles were incubated in modified L15 Medium for 3 hr at 26°C. During incubation, movement of oocytes within follicles held on slides under a microscope was recorded by a video cassette recorder. Within the follicle, the surface of which was marked with carbon particles, the movement of the intrafollicular oocyte was traced by dislocation of its attaching and non-attaching filaments on the chorion. Pre-vitellogenic oocytes exhibited rotation around the predetermined animal-vegetal axis, accompanied by rotation at a slightly oblique angle to the axis. The velocity of oocyte rotation was about 40–48 μm hr−1 and was similar among oocytes of different stages between the pre-vitellogenic and early vitellogenic phases of oogenesis. Rotation was inhibited by cytochalasin B treatment. Also, it was not observed in oocytes surrounded only by the granulosa cell layer when the thecal cell layer and the basement membrane were removed from the follicle. In oocytes with a thick chorion, rotation was also inhibited by impaling the oocytes with a glass needle at a right angle to the animal-vegetal axis of the oocyte. These results provide evidence that growing medaka oocytes rotate primarily around their animal-vegetal axis and at a slightly oblique angle to the axis. That the rotation of medaka oocytes may depend upon the movement of the granulosa and the thecal cells within the follicles was discussed." @default.
- W1569642625 created "2016-06-24" @default.
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- W1569642625 date "1994-04-01" @default.
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- W1569642625 title "Medaka Oocytes Rotate Within the Ovarian Follicles During Oogenesis. (medaka oocyte/rotation/ovarian follicle/attaching filament/animal-vegetal axis)" @default.
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- W1569642625 doi "https://doi.org/10.1111/j.1440-169x.1994.00177.x" @default.
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