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Qualitative and quantitative morphological changes in subcellular fractions from mouse cerebral cortex during
The Journal of Cell Biology
|September 1, 1973
Summary
This study reveals how synaptosomal material distribution changes during mouse brain development. Quantitative analysis of subcellular fractions shows altered synaptosome distribution and growth cone presence as neural maturation progresses.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Biology
Background:
- Understanding neural development requires characterizing subcellular changes.
- Synaptosomes are crucial for neuronal communication and their distribution evolves during maturation.
Purpose of the Study:
- To quantitatively assess synaptosomal material distribution during postnatal mouse cerebral cortex development.
- To qualitatively describe maturation-dependent changes in subcellular fractions.
- To investigate the relationship between neural maturation and growth cone distribution.
Main Methods:
- Preparation of subcellular fractions using discontinuous Ficoll-sucrose gradients.
- Quantitative and qualitative examination of fractions via electron microscopy.
- Determination of synaptosomal material by volume percentage from electron micrographs.
Main Results:
- Synaptosomal material distribution was quantitatively altered during postnatal neural development.
- Qualitative, maturation-dependent changes in subcellular fractions were observed.
- The proportion and distribution of growth cone-like structures were characterized in relation to neural maturation.
Conclusions:
- Synaptosome distribution and characteristics change significantly during neural development.
- Electron microscopy and gradient fractionation provide accurate insights into subcellular particle dynamics.
- Growth cone dynamics are linked to the overall process of neural maturation.