期刊
SCIENCE
卷 314, 期 5799, 页码 657-661出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1131794
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In mammals, odorant receptors (ORs) direct the axons of olfactory sensory neurons (OSNs) toward targets in the olfactory bulb. We show that cyclic adenosine monophosphate ( cAMP) signals that regulate the expression of axon guidance molecules are essential for the OR-instructed axonal projection. Genetic manipulations of ORs, stimulatory G protein, cAMP-dependent protein kinase, and cAMP response element - binding protein shifted the axonal projection sites along the anterior-posterior axis in the olfactory bulb. Thus, it is the OR-derived cAMP signals, rather than direct action of OR molecules, that determine the target destinations of OSNs.
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