多毛纲动物中卵母细胞与滋养细胞之间的细胞间电压梯度。
Intercellular voltage gradient between oocyte and nurse cell in a polychaete.
作者信息
Emanuelsson H, Arlock P
出版信息
Exp Cell Res. 1985 Dec;161(2):558-61. doi: 10.1016/0014-4827(85)90111-9.
In the polychaete Ophryotrocha labronica the oocyte is supported during vitellogenesis by a single nurse cell, which is cytoplasmically contiguous with the oocyte through an intercellular bridge. Our electrical measurements demonstrate a marked potential difference (22-32 mV) between the oocyte and the nurse cell in mid-vitellogenesis, suggesting an electrophoretically caused migration of nurse cell constituents into the oocyte. Possibly this potential gradient helps to create a developmental prepattern in the oocyte, a role postulated for similar gradients within the oocyte-nurse cell complex of the Cecropia moth.
在多毛纲动物拉氏疣吻沙蚕中，卵母细胞在卵黄发生过程中由单个营养细胞支持，该营养细胞通过细胞间桥与卵母细胞在细胞质上相连。我们的电学测量表明，在卵黄发生中期，卵母细胞和营养细胞之间存在明显的电位差（22 - 32毫伏），这表明营养细胞成分通过电泳迁移到卵母细胞中。这种电位梯度可能有助于在卵母细胞中形成发育前模式，这一作用在天蚕蛾的卵母细胞 - 营养细胞复合体中也有类似梯度的推测。
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