Vocal control area-related expression of neuropilin-1, plexin-A4, and the ligand semaphorin-3A has implications for the evolution of the avian vocal system

Development, Growth & Differentiation
Eiji Matsunaga, Kazuo Okanoya

Abstract

The avian vocal system is a good model for exploring the molecular basis of neural circuit evolution related to behavioral diversity. Previously, we conducted a comparative gene expression analysis among two different families of vocal learner, the Bengalese finch (Lonchura striata var. domestica), a songbird, and the budgerigar (Melopsittacus undulatus), a parrot; and a non-learner, the quail (Coturnix coturnix), to identify various axon guidance molecules such as cadherin and neuropilin-1 as vocal control area-related genes. Here, we continue with this study and examine the expression of neuropilin and related genes in these species in more detail. We found that neuropilin-1 and its coreceptor, plexin-A4, were expressed in several vocal control areas in both Bengalese finch and budgerigar brains. In addition, semaphorin-3A, the ligand of neuropilin-1, expression was not detected in vocal control areas in both species. Furthermore, there was some similar gene expression in the quail brain. These results suggest the possibility that a change in the expression of a combination of semaphorin/neuropilin/plexin was involved in the acquisition of vocal learning ability during evolution.

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Citations

Jul 4, 2012·Nature Biotechnology·Sergey Koren Adam M Phillippy
Feb 19, 2009·Development, Growth & Differentiation·Eiji Matsunaga, Kazuo Okanoya
Mar 30, 2017·Neuroscience and Biobehavioral Reviews·Michel Belyk, Steven Brown
Apr 5, 2018·BMC Genomics·Peter V LovellClaudio V Mello
Nov 2, 2021·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Michel BelykCarolyn McGettigan

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