Abstract:
:Stromal-derived factor 1 (SDF-1), a known chemoattractant, and its receptor CXCR4 are widely expressed in the developing and adult cerebral cortex. Recent studies have highlighted potential roles for SDF-1 during early cortical development. In view of the current findings, our histological analysis has revealed a distinct pattern of SDF-1 expression in the developing cerebral cortex at a time when cell proliferation and migration are at peak. To determine the role of chemokine signalling during early cortical development, embryonic rat brain slices were exposed to a medium containing secreted SDF-1 to perturb the endogenous levels of chemokine. Alternatively, brain slices were treated with 40 muM of T140 or AMD3100, known antagonists of CXCR4. Using these experimental approaches, we demonstrate that chemokine signalling is imperative for the maintenance of the early cortical plate. In addition, we provide evidence that both neurogenesis and radial migration are concomitantly regulated by this signalling system. Conversely, interneurons, although not dependent on SDF-1 signalling to transgress the telencephalic boundary, require the chemokine to maintain their tangential migration. Collectively, our results demonstrate that SDF-1 with its distinct pattern of expression is essential and uniquely positioned to regulate key developmental events that underlie the formation of the cerebral cortex.
journal_name
Dev Neuroscijournal_title
Developmental neuroscienceauthors
Liapi A,Pritchett J,Jones O,Fujii N,Parnavelas JG,Nadarajah Bdoi
10.1159/000109857subject
Has Abstractpub_date
2008-01-01 00:00:00pages
117-31issue
1-3eissn
0378-5866issn
1421-9859pii
000109857journal_volume
30pub_type
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