Clonal production and organization of inhibitory interneurons in the neocortex |
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Authors: | Brown Keith N Chen She Han Zhi Lu Chun-Hui Tan Xin Zhang Xin-Jun Ding Liya Lopez-Cruz Alejandro Saur Dieter Anderson Stewart A Huang Kun Shi Song-Hai |
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Affiliation: | Developmental Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA. |
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Abstract: | The neocortex contains excitatory neurons and inhibitory interneurons. Clones of neocortical excitatory neurons originating from the same progenitor cell are spatially organized and contribute to the formation of functional microcircuits. In contrast, relatively little is known about the production and organization of neocortical inhibitory interneurons. We found that neocortical inhibitory interneurons were produced as spatially organized clonal units in the developing ventral telencephalon. Furthermore, clonally related interneurons did not randomly disperse but formed spatially isolated clusters in the neocortex. Individual clonal clusters consisting of interneurons expressing the same or distinct neurochemical markers exhibited clear vertical or horizontal organization. These results suggest that the lineage relationship plays a pivotal role in the organization of inhibitory interneurons in the neocortex. |
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