Related Experiment Videos
Adhesion Forces between Lewis(X) Determinant Antigens as Measured by Atomic Force Microscopy
C Tromas1, J Rojo, J M de la Fuente
1Grupo de Carbohidratos, Instituto de Investigaciones Químicas, CSIC, Isla de La Cartuja Américo Vespucio s/n, 41092 Sevilla, Spain, Fax: (+34) 95-448-95-63.
Angewandte Chemie (International Ed. in English)
|August 31, 2002
Summary
Lewis(X) trisaccharide antigen (Le(X)) molecules show self-recognition, with adhesion forces measured in water and calcium solutions. This supports carbohydrate-carbohydrate interactions as a key initial step in biological cell adhesion.
Area of Science:
- Biochemistry
- Molecular Biology
- Biophysics
Background:
- Cell adhesion is a fundamental biological process.
- Carbohydrate-carbohydrate interactions (CCIs) are increasingly recognized for their role in cellular recognition.
Purpose of the Study:
- To quantify the adhesion forces between individual Lewis(X) trisaccharide antigen (Le(X)) molecules.
- To investigate the influence of calcium ions on Le(X) self-recognition.
Main Methods:
- Atomic Force Microscopy (AFM) was employed to measure single-molecule adhesion forces.
- Measurements were conducted in aqueous buffer and in the presence of calcium ions.
Main Results:
- Direct measurement of adhesion forces between Le(X) molecules was achieved.
- The results demonstrate significant self-recognition capabilities of the Le(X) antigen.
- Calcium ions were found to influence the measured adhesion forces.
Conclusions:
- The findings provide direct evidence for the self-recognition of the Le(X) antigen.
- This study reinforces the hypothesis that CCIs are a primary mechanism in natural cell-adhesion processes.
- The data highlights the importance of specific carbohydrate structures in mediating cell-cell interactions.