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The cell surface coat in neurulating mouse and rat embryos, studied with lectins
Anatomy and Embryology
|January 1, 1986
Summary
Cell surface carbohydrates, including alpha-D-mannose and alpha-D-glucose, are crucial for cell adhesion during mammalian embryo neural tube closure. Their presence in the neural fusion zone suggests a role in establishing cell contacts.
Area of Science:
- Developmental Biology
- Cell Biology
- Biochemistry
Background:
- Cell surface carbohydrates are implicated in cell adhesion processes.
- Understanding the molecular mechanisms of neural tube closure is vital for developmental biology.
Purpose of the Study:
- To investigate the role of specific carbohydrate residues in the cell surface coat during mammalian neural tube closure.
- To quantify the presence of alpha-D-mannose, alpha-D-glucose, and N-acetyl-D-glucosamine in the neural fusion zone.
Main Methods:
- Utilized lectins (concanavalin A and wheat germ agglutinin) to identify and quantify specific sugar residues.
- Employed a two-step incubation technique with protein-gold conjugates for detection.
- Analyzed carbohydrate presence in the absence and after enzymatic treatment.
Main Results:
- A high incidence of alpha-D-mannose, alpha-D-glucose, and N-acetyl-D-glucosamine was detected in the fusion zone of the neural walls.
- The distribution of these sugar residues suggests a correlation with cell adhesion during neural tube formation.
Conclusions:
- The study indicates that specific carbohydrate residues in the cell surface coat play a significant role in cell adhesion during neural tube closure.
- These findings contribute to understanding the molecular basis of cell-cell interactions in embryonic development.