Sorting of striatal and cortical interneurons regulated by semaphorin-neuropilin interactions.
Most striatal and cortical interneurons arise from the basal telencephalon, later segregating to their respective targets. Here, we show that migrating cortical interneurons avoid entering the striatum because of a chemorepulsive signal composed at least in part of semaphorin 3A and semaphorin 3F. Migrating interneurons expressing neuropilins, receptors for semaphorins, are directed to the cortex; those lacking them go to the striatum. Loss of neuropilin function increases the number of interneurons that migrate into the striatum. These observations reveal a mechanism by which neuropilins mediate sorting of distinct neuronal populations into different brain structures, and provide evidence that, in addition to guiding axons, these receptors also control neuronal migration in the central nervous system.
Marín
O
O
Department of Psychiatry, Nina Ireland Laboratory of Developmental Neurobiology, Langley Porter Psychiatric Institute, University of California, San Francisco, CA 94143, USA.
Yaron
A
A
Bagri
A
A
Tessier-Lavigne
M
M
Rubenstein
J L
JL
D000818:Animals; D001479:Basal Ganglia / Q000166:cytology* / Q000196:embryology / Q000378:metabolism; D019556:COS Cells; D002465:Cell Movement; D002540:Cerebral Cortex / Q000166:cytology* / Q000196:embryology / Q000378:metabolism; D003342:Corpus Striatum / Q000166:cytology* / Q000196:embryology / Q000378:metabolism; D046508:Culture Techniques; D006023:Glycoproteins / Q000378:metabolism*; D049452:Green Fluorescent Proteins; D007395:Interneurons / Q000378:metabolism / Q000502:physiology*; D008024:Ligands; D008164:Luminescent Proteins / Q000378:metabolism; D008565:Membrane Proteins / Q000378:metabolism*; D051379:Mice; D008822:Mice, Transgenic; D009154:Mutation; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism*; D039942:Neuropilin-1; D011994:Recombinant Proteins / Q000378:metabolism; D040121:Semaphorin-3A; D015398:Signal Transduction
D006023:Glycoproteins; D008024:Ligands; D008164:Luminescent Proteins; D008565:Membrane Proteins; D009419:Nerve Tissue Proteins; D011994:Recombinant Proteins; D040121:Semaphorin-3A; D039942:Neuropilin-1; D049452:Green Fluorescent Proteins