growth cone


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growth cone

[′grōth ‚kōn]
(neuroscience)
A specialized structure at the end of a growing nerve fiber that guides the fiber to its destination during the development of the nervous system by means of interaction with signaling molecules in its surroundings and its own motile mechanism.
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It was shown that Nogo-A-[DELTA]20 binds S1PR2 to mediate its growth-inhibitory effects by signaling through the G protein [G.sub.13], leukemia-associated Rho guanine exchange factor (LARG) and RhoA to mediate actin destabilization and growth cone collapse [88].
Elongated lamellipodia of Aplysia bag-cell neuronal growth cone treated with 70 [micro]M (-)-blebbistatin had been demonstrated [23].
(44) Conversely, overexpression of MLK-1 improves the frequency and timing of growth cone formation, as well as the rate of successful migration of growth cones to their target sites.
The microtubule and actin cytoskeleton orchestrates axonal growth cone dynamics by a process of signal transduction leading to either depolymerisation or polymerisation events, for directional growth [119].
Conversion of neuronal growth cone responses from repulsion to attraction by cyclic nucleotides.
From the tip of the neurite develops the growth cone, a filopodial structure.
A specialised structure on the leading edge of these processes, the neuronal growth cone, contains specific receptors that detect and respond to signals in the surrounding environment on the way to reaching their target cells.
The next section focuses on the policy debate in 1960 and Bryan's introduction of a short-term, reserve growth cone as an operating guide.
Between the fourth quarter of last year and June, M2 expanded at an annual rate of almost 5 percent; as the Committee had anticipated, the aggregate was running close to the upper bound of its growth cone, which had been chosen to be consistent with price stability.
The presence of two unique membrane-associated phosphoproteins in growth cones is interesting in light of studies linking intracellular calcium ion and other second messengers to growth cone behaviour involved in synaptic remodelling in adult neurons.