Periodic stripe formation by a Turing mechanism operating at growth zones in the mammalian palate.

Periodic stripe formation by a Turing mechanism operating at growth zones in the mammalian palate.
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DOI:
10.1038/ng.1090
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发表时间:
2012-02-19
期刊:
影响因子:
30.8
通讯作者:
Green, Jeremy B. A.
Green, Jeremy B. A.
中科院分区:
生物学1区
文献类型:
--
作者:
Economou, Andrew D.;Ohazama, Atsushi;Porntaveetus, Thantrira;Sharpe, Paul T.;Kondo, Shigeru;Basson, M. Albert;Gritli-Linde, Amel;Cobourne, Martyn T.;Green, Jeremy B. A.

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We present direct evidence of an activator-inhibitor system in the generation of the regularly spaced transverse ridges of the palate. We show that new ridges, or rugae, marked by stripes of Sonic hedgehog (Shh) expression, appear at two growth zones where the space between previously laid-down rugae increases. However, inter-rugal growth is not absolutely required: new stripes still appear when growth is inhibited. Furthermore, when a ruga is excised new Shh expression appears, not at the cut edge but as bifurcating stripes branching from the neighbouring Shh stripe, diagnostic of a Turing-type reaction-diffusion mechanism. Genetic and inhibitor experiments identify Fibroblast Growth Factor (FGF) and Shh as an activator-inhibitor pair in this system. These findings demonstrate a reaction-diffusion mechanism likely to be widely relevant in vertebrate development.
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