Oogenesis and egg development in triatomines: a biochemical approach
Oogenesis and egg development in triatomines: a biochemical approach
复制标题
DOI：
10.1590/s0001-37652005000300005
复制
发表时间：
2005-09-01
期刊：
影响因子：
--
通讯作者：
Masuda, Hatisaburo
中科院分区：
文献类型：
--
作者：
Atella, Georgia C.;Gondim, Katia C.;Masuda, Hatisaburo
在锥蝽和其他昆虫中，卵黄的积累是一个过程，在这个过程中，卵巢外的组织，脂肪体，产生卵黄蛋白，这些蛋白被包装在卵中。由脂肪体合成的主要蛋白质是卵黄蛋白原，它在卵母细胞内积累。这个过程也被称为卵黄发生。越来越多的证据表明，在锥壳类动物中，卵巢除了产生脂肪体外，还产生卵黄蛋白。这些卵黄蛋白进入卵母细胞的方式将被讨论。卵黄是由蛋白质、脂类、碳水化合物和其他次要成分组成的复杂物质，以有组织的方式包装在卵母细胞内。受精触发胚胎发生，这是胚胎发育的一个过程。在胚胎发生期间，卵黄将用于构建新个体，即第一龄若虫。未来十年的挑战是了解这些卵蛋白及其非蛋白质成分是如何以及在哪里被消耗的，与胚胎的遗传程序同步，这使得卵内的细胞分化（胚胎发生的早期阶段）和胚胎分化（晚期阶段）成为可能。
In triatomines, as well as in other insects, accumulation of yolk is a process in which an extra-ovarian tissue, the fat body, produces yolk proteins that are packed in the egg. The main protein, synthesized by the fat body, which is accumulated inside the oocyte, is vitellogenin. This process is also known as vitellogenesis. There are growing evidences in-triatomines that besides fat body the ovary also produces yolk proteins. The way these yolk proteins enter the oocyte will be discussed. Yolk is a complex material composed of proteins, lipids, carbohydrates and other minor components which are packed inside the oocyte in an organized manner. Fertilization triggers embryogenesis, a process where an embryo will develop. During embryogenesis the yolk will be used for the construction of a new individual, the first instar nymph. The challenge for the next decade is to understand how and where these egg proteins are used up together with their non-protein components, in pace with the genetic program of the embryo, which enables cell differentiation (early phase of embryogenesis) and embryo differentiation (late phase) inside the egg.