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Membrane changes in neural target cells studied with fluorescent lectin probes
Journal of Embryology and Experimental Morphology
|October 1, 1983
Summary
This study reveals distinct carbohydrate patterns on the ectoderm of Pleurodeles waltl using lectin probes. These differences highlight membrane fluidity and the formation of an extracellular matrix crucial for neural induction and morphogenetic movements.
Area of Science:
- Developmental biology
- Cell biology
- Molecular biology
Background:
- The ectoderm of Pleurodeles waltl possesses two distinct cell layers.
- Differences in morphology, composition, and molecular arrangement exist between these layers.
Purpose of the Study:
- To investigate the carbohydrate composition and receptor distribution on the ectoderm.
- To understand the role of membrane glycoconjugates in neural induction and morphogenesis.
Main Methods:
- In vitro observation of ectoderm tissue using labeled lectin probes and UV microscopy (epi-illumination).
- Quantification of lectin binding to assess carbohydrate presence and receptor density.
Main Results:
- Differential lectin binding (SBA, PSA, LCA, Con A) indicates specific carbohydrate profiles.
- The internal ectoderm surface exhibits denser lectin labeling than the external surface.
- Evidence of membrane fluidity, glycoconjugate turnover, and extracellular matrix formation on the internal surface.
Conclusions:
- Distinct molecular differences exist between the internal and external ectoderm surfaces.
- Membrane fluidity and extracellular matrix are critical for neural induction and morphogenetic movements.