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Detection of Sialic Acids on the Cell Surface Using Flow Cytometry
Hirohito Ishigaki1, Yasushi Itoh2
1Division of Pathogenesis and Disease Regulation, Department of Pathology, Shiga University of Medical Science, Shiga, Japan. ihiro@belle.shiga-med.ac.jp.
Methods in Molecular Biology (Clifton, N.J.)
|September 29, 2022
Summary
This study presents a flow cytometry method to detect specific sialic acid linkages (α2-3 and α2-6) on cell surfaces using lectins. This technique allows for semi-quantitative analysis of these important cell surface glycans.
Area of Science:
- Glycobiology
- Cell Biology
- Immunology
Background:
- Sialic acids are crucial glycans involved in cell recognition and signaling.
- Distinguishing between α2-3 and α2-6 sialic acid linkages is vital for understanding biological processes.
Purpose of the Study:
- To develop and validate a flow cytometry-based method for semi-quantitative detection of α2-3 and α2-6 sialic acids on cell surfaces.
- To enable precise analysis of sialic acid expression patterns in various cell types.
Main Methods:
- Cells were fixed and stained with biotinylated MAACKIA AMURENSIS LECTIN II (MALII) for α2-3 and biotinylated ELDERBERRY BARK LECTIN (SNA) for α2-6 sialic acids.
- Sialidase treatment was employed to confirm staining specificity.
- Streptavidin conjugated with Alexa Fluor 488 was used for detection via flow cytometry.
Main Results:
- The method successfully differentiated and semi-quantitatively detected both α2-3 and α2-6 linked sialic acids on the cell surface.
- Specificity of lectin binding was confirmed through sialidase digestion.
Conclusions:
- Flow cytometry provides a robust platform for analyzing cell surface sialic acid linkages.
- This method facilitates research in areas where sialic acid expression is critical, such as immunology and disease diagnostics.
