Neuronal activity biases axon selection for myelination in vivo.
Neuronal activity biases axon selection for myelination in vivo.
复制标题
神经元活动会影响体内髓鞘形成的轴突选择。
DOI:
10.1038/nn.3992
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发表时间:
2015-05
影响因子:
25
通讯作者:
Appel, Bruce
中科院分区:
文献类型:
--
作者:
Hines, Jacob H.;Ravanelli, Andrew M.;Schwindt, Rani;Scott, Ethan K.;Appel, Bruce
An essential feature of vertebrate neural development is ensheathment of axons with myelin, an insulating membrane formed by oligodendrocytes. Not all axons are myelinated, but mechanisms directing myelination of specific axons are unknown. Using zebrafish we show that activity-dependent secretion stabilizes myelin sheath formation on select axons. When VAMP2-dependent exocytosis is silenced in single axons, oligodendrocytes preferentially ensheath neighboring axons. Nascent sheaths formed on silenced axons are shorter in length, but when activity of neighboring axons is also suppressed, inhibition of sheath growth is relieved. Using in vivo time-lapse microscopy, we show that only 25% of oligodendrocyte processes that initiate axon wrapping are stabilized during normal development, and that initiation does not require activity. Instead, oligodendrocyte processes wrapping silenced axons are retracted more frequently. We propose that axon selection for myelination results from excessive and indiscriminate initiation of wrapping followed by refinement that is biased by activity-dependent secretion from axons.
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DOI:
10.1523/jneurosci.2455-11.2011
发表时间:
2011-08-31
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
De Biase LM;Kang SH;Baxi EG;Fukaya M;Pucak ML;Mishina M;Calabresi PA;Bergles DE
通讯作者:
Bergles DE
影响因子:
4.6
作者:
Nechiporuk, Alexei;Linbo, Tor;Raible, David W.
通讯作者:
Raible, David W.
影响因子:
25
作者:
Kucenas, Sarah;Takada, Norio;Appel, Bruce
通讯作者:
Appel, Bruce
影响因子:
25
作者:
Kukley, Maria;Capetillo-Zarate, Estibaliz;Dietrich, Dirk
通讯作者:
Dietrich, Dirk
影响因子:
48
作者:
Lee, Seonok;Leach, Michelle K.;Redmond, Stephanie A.;Chong, S. Y. Christin;Mellon, Synthia H.;Tuck, Samuel J.;Feng, Zhang-Qi;Corey, Joseph M.;Chan, Jonah R.
通讯作者:
Chan, Jonah R.