Linked Life Data

12077193

Source:http://linkedlifedata.com/resource/pubmed/id/12077193

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pubmed-article:12077193pubmed:abstractTextCumulative evidence suggests that neural network formation requires an ingenious regulation of the attractive and repulsive responses of growing axons to guidance cues. We examined the role of intracellular protein kinase A (PKA) signaling in the axonal pathfinding of olfactory sensory neurons in transparent zebrafish embryos. Microinjection of an olfactory marker protein gene promoter-driven double-cassette vector directed the expression of both the dominant form of PKA and green fluorescent protein fused with the microtubule-associated protein tau in the same olfactory neurons. The dominant-negative form of PKA enhanced the turning of olfactory neuron axons in the olfactory placode, whereas the disturbance effect of the constitutively active form on the axonal pathfinding was prominent in the olfactory bulb. Consistently, forskolin treatment severely inhibited the axonal extension in the olfactory bulb, but not in the olfactory placode. These results suggest that the switching of PKA signaling in developing olfactory sensory neurons is important for axonal pathfinding through the boundary between the olfactory placode and the olfactory bulb in vivo. We thus propose that the regulation of PKA signaling plays a key role in the long-distance axonal pathfinding through intermediate guideposts.lld:pubmed
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pubmed-article:12077193pubmed:authorpubmed-author:MishinaMasayo...lld:pubmed
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pubmed-article:12077193pubmed:dateRevised2007-11-15lld:pubmed
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pubmed-article:12077193pubmed:articleTitleRegulation by protein kinase A switching of axonal pathfinding of zebrafish olfactory sensory neurons through the olfactory placode-olfactory bulb boundary.lld:pubmed
pubmed-article:12077193pubmed:affiliationDepartment of Molecular Neurobiology and Pharmacology, Graduate School of Medicine, University of Tokyo, and SORST, Japan Science and Technology Corporation, Tokyo 113-0033, Japan.lld:pubmed
pubmed-article:12077193pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:12077193pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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