Journal
JOURNAL OF NEUROCHEMISTRY
Volume 76, Issue 5, Pages 1455-1464Publisher
BLACKWELL SCIENCE LTD
DOI: 10.1046/j.1471-4159.2001.00177.x
Keywords
area 4; cerebral cortex; differential display PCR (DD-PCR); proprotein processing; TGF-beta
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We applied a differential display PCR technique to isolate molecules that are area-specific in expression in the primate neocortex, and found that growth/differentiation factor 7 (GDF7), a member of the bone morphogenetic protein (BMP)/transforming growth factor (TGF) beta super-family, is preferentially expressed in the primary motor area of African green monkeys (Cercopithecus aethiops). We proved that GDF7 is 10 times more abundant in the motor cortex than in the visual cortex by northern blotting and quantitative RT-PCR. When we examined the neocortex of closely related rhesus monkeys (Macaca mulatta), GDF7 was also most abundant in the motor cortex, although the regional difference was reduced to 3-fold. This differential expression pattern was observed in both newborn and infant rhesus monkeys. We found that several type I/II receptors of BMP, candidates of the receptors for GDF7, are uniformly expressed in the mature neocortex. The unique expression pattern of GDF7 suggests that it may play an active role in the motor area of the primate neocortex.
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