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In a comparison of embryonic brain expression patterns of lysophosphatidic acid and sphingosine 1-phosphate receptor genes (lpa(1-3) and s1p(1-5), respectively), transcripts detected by Northern blot were subsequently localized using in situ hybridization. We found striking s1p(1) expression adjacent to several ventricles. Near the lateral ventricle, s1p(1) expression was temporally and spatially coincident with neurogenesis and overlapped with lpa(1) in the neocortical area. We also observed a widespread diffuse pattern for lpa(2-3) and a scattered punctate pattern for s1p(1-3). The punctate pattern colocalized with vascular endothelial markers. Together, these results suggest that s1p(1) influences neurogenesis and s1p(1-3) influence angiogenesis in the developing brain.
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McGiffert et al. (2002) studied this question.
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