期刊
MOLECULAR BRAIN
卷 12, 期 -, 页码 -出版社
BMC
DOI: 10.1186/s13041-019-0468-x
关键词
Electron microscopy; PSD thickness; PSD curvature; Hippocampal slice cultures
资金
- National Institute of Neurological Disorders and Stroke (NINDS) intramural funds
Activity can induce structural changes in glutamatergic excitatory synapses, including increase in thickness and curvature of the postsynaptic density (PSD); these structural changes can only be documented by electron microscopy. Here in organotypic hippocampal slice cultures where experimental conditions can be easily manipulated, increases in thickness and curvature of PSDs were noticeable within 30s of stimulation and progressed with time up to 3min. These structural changes were reversible upon returning the samples to control medium for 5-10min. Thus, the postsynaptic density is a very dynamic structure that undergoes rapid reorganization of its components upon stimulation, and recovery upon cessation of stimulation. The gradual increase in thickness of PSD could result from a gradual translocation of some PSD proteins to the PSD, and the increase in curvature of the PSD is likely led by postsynaptic elements.
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