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非洲爪蟾卵母细胞的减数分裂成熟:蛋白质分泌停止与高尔基体极化消失之间的联系。

Meiotic maturation in Xenopus oocytes: a link between the cessation of protein secretion and the polarized disappearance of Golgi apparati.

作者信息

Colman A, Jones E A, Heasman J

出版信息

J Cell Biol. 1985 Jul;101(1):313-8. doi: 10.1083/jcb.101.1.313.

Abstract

We have studied the relationship between the timing of the late meiotic events that occur during progesterone-induced oocyte maturation, and intracellular protein transport. We have monitored the secretion of chick oviduct proteins from Xenopus laevis oocytes microinjected with polyadenylated mRNA and found that chick ovalbumin and lysozyme are not secreted during the second meiotic metaphase, in contrast to the earlier prophase stage. Maturation had no detectable effect on the glycosylation of ovalbumin, whereas it affected the glycosylation of chick ovomucoid. As maturation proceeded, the Golgi apparati disappeared in a polarized fashion, beginning in the vegetal half. This disappearance coincided temporally and spatially with that of the nuclear envelope. We speculate that Golgi apparatus disappearance and the block in secretion are causally related.

摘要

我们研究了孕酮诱导的卵母细胞成熟过程中发生的减数分裂后期事件的时间与细胞内蛋白质运输之间的关系。我们监测了用聚腺苷酸化mRNA显微注射的非洲爪蟾卵母细胞中鸡输卵管蛋白的分泌情况,发现与早期的前期阶段相比,在第二次减数分裂中期鸡卵清蛋白和溶菌酶不分泌。成熟对卵清蛋白的糖基化没有可检测到的影响,而它影响了鸡卵类粘蛋白的糖基化。随着成熟过程的进行,高尔基体以极化的方式消失,从植物极半部开始。这种消失在时间和空间上与核膜的消失相吻合。我们推测高尔基体的消失和分泌受阻存在因果关系。

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