Making a visual map: mechanisms and molecules.
Making a visual map: mechanisms and molecules.
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DOI:
10.1016/j.conb.2009.04.011
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发表时间:
2009-04
影响因子:
5.7
通讯作者:
Feldheim, David A.
中科院分区:
文献类型:
--
作者:
Clandinin, Thomas R.;Feldheim, David A.
Visual system development utilizes global and local cues to assemble a topographic map of the visual world, arranging synaptic connections into columns and layers. Recent genetic studies have provided new insights into the mechanisms that underlie these processes. In flies, a precise temporal sequence of neural differentiation provides a global organizing cue; in vertebrates, gradients of ephrin-mediated signals, acting with neurotrophin co-receptors and neural activity, play crucial roles. In flies and mice, neural processes tile into precise arrays through homotypic, repulsive interactions, autocrine signals, and cell-intrinsic mechanisms. Laminar targeting specificity is achieved through temporally regulated cell–cell adhesion, as well as combinatorial expression of specific adhesion molecules. Future studies will define the interactions between these global and local cues.
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