What question did this study set out to answer?

To investigate how delays in transcardial perfusion fixation alter synaptic ultrastructure and protein organization across distinct regions of the mouse brain.

February 13, 2007The Journal of Comparative Neurology

Structural changes at synapses after delayed perfusion fixation in different regions of the mouse brain

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Authors

JTJung‐Hwa Tao‐ChengNational Institutes of Health PGPaul E. GallantNational Institutes of Health MBMilton BrightmanSemmelweis University

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Implication

Preclinical study reveals region-specific postsynaptic thickening and CaMKII clustering in mice following delayed perfusion fixation, highlighting structural markers of ischemic stress.

Key Points

To investigate how delays in transcardial perfusion fixation alter synaptic ultrastructure and protein organization across distinct regions of the mouse brain.
Simulated ischemic stress by introducing a delay during transcardial perfusion fixation of mouse brain tissue.
Used electron microscopy and immunolabeling to quantify postsynaptic density (PSD) thickness, morphology, and alpha-CaMKII localization in the hippocampus (CA1), cerebral cortex (layer III), and cerebellar cortex.
Delayed fixation increased PSD thickness by 70% in the CA1 hippocampus, 90% in layer III cerebral cortex, and 23% in cerebellar Purkinje spines.
Purkinje PSDs exhibited pronounced curvature and formed CaMKII-labeled sub-PSD spheres (~80 nm), whereas pyramidal somas accumulated larger cytoplasmic CaMKII clusters (~110 nm) than Purkinje somas.

Cite This Study

Tao‐Cheng et al. (2007) studied this question.

synapsesocial.com/papers/6a990a22cdb6b1cb7af5aaf3 https://doi.org/10.1002/cne.21276

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Implication

Preclinical study reveals region-specific postsynaptic thickening and CaMKII clustering in mice following delayed perfusion fixation, highlighting structural markers of ischemic stress.

Structural changes at synapses after delayed perfusion fixation in different regions of the mouse brain

Discussion

Member takes

Implication

Key Points

Cite This Study

Structural changes at synapses after delayed perfusion fixation in different regions of the mouse brain

Discussion

Member takes

Implication

Key Points

Cite This Study

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