Active zone compaction in presynaptic homeostatic potentiation
Active zone compaction in presynaptic homeostatic potentiation
复制标题
突触前稳态增强中的活动区压缩
DOI:
10.1101/802843
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Paul MM
中科院分区:
文献类型:
--
作者:
Mrestani A;Kollmannsberger P;Pauli M;Repp F;Kittel RJ;Eilers J;Doose S;Sauer M;Sirén A-L;Heckmann M;Paul MM
Neurotransmitter release is stabilized by homeostatic plasticity. Presynaptic homeostatic potentiation (PHP) operates on timescales ranging from minute- to life-long adaptations and likely involves reorganization of presynaptic active zones (AZs). AtDrosophila melanogasterneuromuscular junctions, earlier work ascribed AZ enlargement by incorporating more Bruchpilot (Brp) scaffold protein a role in PHP. We use localization microscopy (direct stochastic optical reconstruction microscopy [dSTORM]) and hierarchical density-based spatial clustering of applications with noise (HDBSCAN) to study AZ plasticity during PHP at the synaptic mesoscale. We find compaction of individual AZs in acute philanthotoxin-induced and chronic genetically induced PHP but unchanged copy numbers of AZ proteins. Compaction even occurs at the level of Brp subclusters, which move toward AZ centers, and in Rab3 interacting molecule (RIM)-binding protein (RBP) subclusters. Furthermore, correlative confocal and dSTORM imaging reveals how AZ compaction in PHP translates into apparent increases in AZ area and Brp protein content, as implied earlier.
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