Teneurins instruct synaptic partner matching in an olfactory map.
Teneurins instruct synaptic partner matching in an olfactory map.
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DOI:
10.1038/nature10926
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发表时间:
2012-03-18
期刊:
影响因子:
64.8
通讯作者:
Luo, Liqun
中科院分区:
文献类型:
--
作者:
Hong, Weizhe;Mosca, Timothy J.;Luo, Liqun
Neurons are interconnected with extraordinary precision to assemble a functional nervous system. Compared to axon guidance, far less is understood about how individual pre- and post-synaptic partners are matched. To ensure the proper relay of olfactory information in flies, axons of ~50 classes of olfactory receptor neurons (ORNs) form one-to-one connections with dendrites of ~50 classes of projection neurons (PNs). Using genetic screens, we identified two evolutionarily conserved EGF-repeat transmembrane Teneurins, Ten-m and Ten-a, as synaptic partner matching molecules between PN dendrites and ORN axons. Ten-m and Ten-a are highly expressed in select PN-ORN matching pairs. Teneurin loss- and gain-of-function cause specific mismatching of select ORNs and PNs. Finally, Teneurins promote homophilic interactions in vitro, and Ten-m co-expression in non-partner PNs and ORNs promotes their ectopic connections in vivo. We propose that Teneurins instruct matching specificity between synaptic partners through homophilic attraction.
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