A Model of Primitive Streak Initiation in the Chick Embryo
نویسندگان
چکیده
منابع مشابه
A model of primitive streak initiation in the chick embryo.
Initiation of the primitive streak in avian embryos provides a well-studied example of a pattern-forming event that displays a striking capacity for regulation. The mechanisms underlying the regulative properties are, however, poorly understood and are not easily accounted for by traditional models of pattern formation, such as reaction-diffusion models. In this paper, we propose a new activato...
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The body plan of all higher organisms develops during gastrulation. Gastrulation results from the integration of cell proliferation, differentiation and migration of thousands of cells. In the chick embryo gastrulation starts with the formation of the primitive streak, the site of invagination of mesoderm and endoderm cells, from cells overlaying Koller's Sickle. Streak formation is associated ...
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Gastrulation is characterized by the extensive movements of cells. Fate mapping is used to follow such cell movements as they occur over time, and prospective fate maps have been constructed for several stages of the model organisms used in modern studies in developmental biology. In chick embryos, detailed fate maps have been constructed for both prospective mesodermal and ectodermal cells. Ho...
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The work of Waddington and Waterman (1933) has shown that it is possible to cultivate young rabbit embryos in vitro, using the normal watch-glass technique and a medium composed of chicken embryo extract and either chick or rabbit plasma. Micro-surgical operations can be performed on such embryos before they are explanted into culture, and the mutual interactions of the various embryonic rudime...
متن کاملAnalysis of tissue flow patterns during primitive streak formation in the chick embryo.
We have investigated the patterns of tissue flow underlying the formation of the primitive streak in the chick embryo. Analysis of time-lapse sequences of brightfield images to extract the tissue velocity field and of fluorescence images of small groups of DiI-labelled cells have shown that epiblast cells move in two large-scale counter-rotating streams, which merge at the site of streak format...
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ژورنال
عنوان ژورنال: Journal of Theoretical Biology
سال: 2001
ISSN: 0022-5193
DOI: 10.1006/jtbi.2000.2229