Related Experiment Video
Updated: Jun 22, 2026
08:30
Preparation of Synaptoneurosomes from Mouse Cortex using a Discontinuous Percoll-Sucrose Density Gradient
Published on: September 17, 2011
Study on Endogenous Substrates for Calcineurin in Rat Synaptosome
1Department of Biology, Beijing Normal University, Beijing 100875, China.
Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao Acta Biochimica Et Biophysica Sinica
|January 1, 1997
Summary
Researchers identified 11 calcineurin phosphoprotein substrates in rat brain synaptosomes. These substrates change during development, with some, like neuromodulin/GAP-43, crucial for nerve growth.
Area of Science:
- Neuroscience
- Molecular Biology
- Biochemistry
Background:
- Calcineurin is a key enzyme in neuronal function.
- Understanding calcineurin's substrates is vital for comprehending neural development.
Purpose of the Study:
- To identify endogenous phosphoprotein substrates of calcineurin in adult rat cerebral cortex synaptosomes.
- To analyze developmental changes in these substrates from newborn to adult rats.
- To investigate the role of calcineurin in nerve growth and development.
Main Methods:
- Inhibition of calcineurin activity using polyclonal antibodies.
- High-resolution two-dimensional polyacrylamide gel electrophoresis (PAGE) and autoradiography.
- Quantitative analysis using digital image scanning and 2-D software.
Main Results:
- Identified 11 distinct calcineurin phosphoprotein substrates in adult rat synaptosomes.
- Observed significant quantitative changes in substrate expression between newborn and adult rat synaptosomes.
- Detected elevated expression of some substrates, potentially neuromodulin/GAP-43, by postnatal day 3.
Conclusions:
- Calcineurin plays a significant role in nerve growth and development.
- Specific phosphoprotein substrates are dynamically regulated during neural maturation.
- Neuromodulin/GAP-43 is implicated as a calcineurin substrate involved in early neural development.
