Effects of CaMKII inhibitor tatCN21 on activity-dependent redistribution of CaMKII in hippocampal neurons.
Effects of CaMKII inhibitor tatCN21 on activity-dependent redistribution of CaMKII in hippocampal neurons.
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DOI:
10.1016/j.neuroscience.2013.03.063
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发表时间:
2013-08-06
期刊:
影响因子:
3.3
通讯作者:
Dosemeci A
中科院分区:
文献类型:
--
作者:
Tao-Cheng JH;Yang Y;Bayer KU;Reese TS;Dosemeci A
TatCN21 is a membrane permeable CaMKII inhibitor derived from the inhibitor protein CaMKIIN. TatCN21 has been used to demonstrate the involvement of CaMKII in a variety of physiological and pathological phenomena, and it also limits excitotoxic damage in neurons. Here we use preembedding immunogold electron microscopy to examine the effect of tatCN21 on the redistribution of CaMKII in cultured hippocampal neurons. Incubation of cultures with tatCN21 (20 μM for 20 min) prior to exposure to NMDA (50 μM for 2 min) inhibited both the accumulation of CaMKII at postsynaptic densities (PSDs) and CaMKII clustering in the dendrites. Under these conditions, CaMKII also formed morphologically distinct aggregates with polyribosomes near the PSD and in dendrites. Formation of these CaMKII-polyribosome aggregates requires the presence of both tatCN21 and calcium, and was augmented upon exposure to high K+ or NMDA. CaMKII-polyribosome aggregates formed consistently with 20 μM tatCN21, but minimally or not at all with 5 μM. However, these aggregates are not induced by another CaMKII inhibitor, KN93. Formation of CaMKII-polyribosome aggregates was completely reversible within 1 h after washout of tatCN21. Effects of tatCN21 were largely restricted to dendrites, with minimal effect in the soma. The effects of tatCN21 on CaMKII distribution can be used to dissect the mechanism of CaMKII involvement in cellular events.
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影响因子:
5.3
作者:
Dosemeci, A;Reese, TS;Cheng, JHT
通讯作者:
Cheng, JHT
DOI:
10.1523/jneurosci.1250-11.2011
发表时间:
2011-06-22
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Sanhueza M;Fernandez-Villalobos G;Stein IS;Kasumova G;Zhang P;Bayer KU;Otmakhov N;Hell JW;Lisman J
通讯作者:
Lisman J
影响因子:
2.5
作者:
Tao-Cheng, Jung-Hwa;Gallant, Paul E.;Reese, Thomas S.
通讯作者:
Reese, Thomas S.
影响因子:
3.4
作者:
Lepicard, Eve M.;Mizuno, Keiko;Giese, K. Peter
通讯作者:
Giese, K. Peter
DOI:
10.1073/pnas.181336998
发表时间:
2001-08-28
影响因子:
11.1
作者:
Dosemeci, A;Tao-Cheng, JH;Reese, TS
通讯作者:
Reese, TS