Optic chiasm presentation of Semaphorin6D in the context of Plexin-A1 and Nr-CAM promotes retinal axon midline crossing.
Optic chiasm presentation of Semaphorin6D in the context of Plexin-A1 and Nr-CAM promotes retinal axon midline crossing.
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DOI:
10.1016/j.neuron.2012.03.025
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发表时间:
2012-05-24
期刊:
影响因子:
16.2
通讯作者:
Mason C
中科院分区:
文献类型:
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作者:
Kuwajima T;Yoshida Y;Takegahara N;Petros TJ;Kumanogoh A;Jessell TM;Sakurai T;Mason C
At the optic chiasm, retinal ganglion cells (RGCs) project ipsi- or contralaterally to establish the circuitry for binocular vision. Ipsilateral guidance programs have been characterized, but contralateral guidance programs are not well understood. Here we identify a tripartite molecular system for contralateral RGC projections: Semaphorin 6D and Nr-CAM are expressed on midline radial glia and Plexin-A1 on chiasm neurons, and Plexin-A1 and Nr-CAM are also expressed on contralateral RGCs. Sema6D is repulsive to contralateral RGCs, but Sema6D in combination with Nr-CAM and Plexin-A1 converts repulsion to growth-promotion. Nr-CAM functions as a novel receptor for Sema6D. Sema6D, Plexin-A1 and Nr-CAM are all required for efficient RGC decussation at the optic chiasm. These findings suggest a novel mechanism by which a complex of Sema6D, Nr-CAM, and Plexin-A1 at the chiasm midline alters the sign of Sema6D and signals Nr-CAM/Plexin-A1 receptors on RGCs to implement the contralateral RGC projection.
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影响因子:
5.3
作者:
Lee, Ramee;Petros, Timothy J.;Mason, Carol A.
通讯作者:
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影响因子:
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