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@ARTICLE{Kiss:140090,
author = {Kiss, Alexa and Fischer, Irmgard and Kleele, Tatjana and
Misgeld, Thomas and Propst, Friedrich},
title = {{N}euronal {G}rowth {C}one {S}ize-{D}ependent and
-{I}ndependent {P}arameters of {M}icrotubule
{P}olymerization.},
journal = {Frontiers in cellular neuroscience},
volume = {12},
issn = {1662-5102},
address = {Lausanne},
publisher = {Frontiers Research Foundation},
reportid = {DZNE-2020-06412},
pages = {195},
year = {2018},
abstract = {Migration and pathfinding of neuronal growth cones during
neurite extension is critically dependent on dynamic
microtubules. In this study we sought to determine, which
aspects of microtubule polymerization relate to growth cone
morphology and migratory characteristics. We conducted a
multiscale quantitative microscopy analysis using automated
tracking of microtubule plus ends in migrating growth cones
of cultured murine dorsal root ganglion (DRG) neurons.
Notably, this comprehensive analysis failed to identify any
changes in microtubule polymerization parameters that were
specifically associated with spontaneous extension vs.
retraction of growth cones. This suggests that microtubule
dynamicity is a basic mechanism that does not determine the
polarity of growth cone response but can be exploited to
accommodate diverse growth cone behaviors. At the same time,
we found a correlation between growth cone size and basic
parameters of microtubule polymerization including the
density of growing microtubule plus ends and rate and
duration of microtubule growth. A similar correlation was
observed in growth cones of neurons lacking the
microtubule-associated protein MAP1B. However, MAP1B-null
growth cones, which are deficient in growth cone migration
and steering, displayed an overall reduction in microtubule
dynamicity. Our results highlight the importance of taking
growth cone size into account when evaluating the influence
on growth cone microtubule dynamics of different substrata,
guidance factors or genetic manipulations which all can
change growth cone morphology and size. The type of large
scale multiparametric analysis performed here can help to
separate direct effects that these perturbations might have
on microtubule dynamics from indirect effects resulting from
perturbation-induced changes in growth cone size.},
cin = {München Pre 2020 / AG Misgeld},
ddc = {610},
cid = {I:(DE-2719)6000016 / I:(DE-2719)1110000-4},
pnm = {341 - Molecular Signaling (POF3-341)},
pid = {G:(DE-HGF)POF3-341},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30065631},
pmc = {pmc:PMC6056669},
doi = {10.3389/fncel.2018.00195},
url = {https://pub.dzne.de/record/140090},
}