Adenosine induces growth-cone turning of sensory neurons.
The formation of appropriate connections between neurons and their specific targets is an essential step during development and repair of the nervous system. Growth cones are located at the leading edges of the growing neurites and respond to environmental cues in order to be guided to their final targets. Directional information can be coded by concentration gradients of substrate-bound or diffusible-guidance molecules. Here we show that concentration gradients of adenosine stimulate growth cones of sensory neurons (dorsal root ganglia) from chicken embryos to turn towards the adenosine source. This response is mediated by adenosine receptors. The subsequent signal transduction process involves cAMP. It may be speculated that the in vivo function of this response is concerned with the formation or the repair and regeneration of the peripheral nervous system.
Grau
Benjamin
B
Department of Cellular, Molecular, and Developmental Neurobiology, Cajal Institute, C.S.I.C., Ave. Dr. Arce 37, Madrid, 28002, Spain.
Eilert
John-Christian
JC
Munck
Sebastian
S
Harz
Hartmann
H
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