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Differential expression of S100 proteins in the developing human hippocampus and temporal cortex
Wood Yee Chan1, Chun-Lin Xia, Da-Cui Dong
1Department of Anatomy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.
Microscopy Research and Technique
|March 20, 2003
Summary
This study maps the expression of S100A4, S100A5, and S100A13 proteins in the developing human fetal brain. Researchers identified distinct spatio-temporal patterns for these S100 calcium binding proteins during crucial developmental stages.
Area of Science:
- Neuroscience
- Developmental Biology
- Molecular Biology
Background:
- S100 calcium binding proteins are known in adult nervous systems, but their developmental roles in the human fetal brain are unclear.
- Understanding these proteins' expression is crucial for insights into neurodevelopmental processes.
Purpose of the Study:
- To investigate the spatio-temporal expression patterns of S100A4, S100A5, and S100A13 proteins.
- To analyze their distribution within the human fetal hippocampus and temporal cortex during development (12-33 weeks gestation).
Main Methods:
- Immunohistochemical analysis was employed to detect S100A4, S100A5, and S100A13.
- Human fetal brain tissue samples from 12 to 33 weeks of gestation were examined.
Main Results:
- S100A5 and S100A13 showed distinct expression patterns, decreasing with age in both hippocampus and temporal cortex after initial high expression.
- S100A4 exhibited weak but consistent expression across all examined fetal brain regions and developmental stages.
- Specific spatio-temporal expression profiles were identified for each S100 protein in the developing human fetal brain.
Conclusions:
- This study provides the first detailed map of S100A4, S100A5, and S100A13 expression in the human fetal brain.
- The identified patterns suggest diverse developmental roles for these homologous S100 proteins in the hippocampus and temporal cortex.