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[Ultracytochemical study of Ca(2+)-ATPase activity in developing rat brain]
K Kawai1, K Wakabayashi, H Takahashi
1Department of Pathology, Brain Research Institute, Niigata University, Japan.
No to Shinkei = Brain and Nerve
|December 1, 1991
Summary
Calcium (Ca2+)-ATPase activity emerges in rat brain cells and microvessels during development. This enzyme
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Calcium ion (Ca2+) transport is crucial for neuronal function.
- Ca2+-ATPase plays a vital role in maintaining Ca2+ homeostasis.
- Understanding Ca2+-ATPase development in the brain is key to neurodevelopmental research.
Purpose of the Study:
- To investigate the spatiotemporal expression of Ca2+-ATPase activity.
- To correlate Ca2+-ATPase activity with the differentiation of neural and glial cells.
- To examine Ca2+-ATPase activity in developing brain microvasculature.
Main Methods:
- Ultracytochemical localization of Ca2+-ATPase activity.
- Enzyme activity assessment in rat brain tissue at various developmental stages (E11, E14, E19, P5) and adulthood.
- Microscopic analysis of reaction product distribution.
Main Results:
- No Ca2+-ATPase activity detected in matrix cells (E11) and neuroblasts (E14).
- Weak Ca2+-ATPase activity observed in glioblasts (E19).
- Ca2+-ATPase activity present on neuronal and glial cell surfaces from P5 onwards.
- Microvessel Ca2+-ATPase activity detected from E19, with distinct changes in reaction product morphology through P5 and adulthood.
Conclusions:
- Ca2+-ATPase activity is developmentally regulated in the rat central nervous system.
- The enzyme's emergence correlates with neural and glial cell maturation.
- Ca2+-ATPase activity in brain microvasculature also shows developmental changes, suggesting roles in vascular development and function.