Selectin-Binding Assay by Flow Cytometry.

Area of Science:

• Cellular and Molecular Biology
• Cancer Research
• Immunology

Background:

• Selectin-glycan interactions mediate crucial cellular processes like leukocyte recruitment and cancer cell metastasis.
• Upregulation of selectin-ligand glycans enhances these interactions, particularly during leukocyte activation and epithelial-mesenchymal transition (EMT) in cancer cells.
• Traditional assays like cell adhesion and rolling assays assess these interactions but can be limited in quantitation.

Purpose of the Study:

• To introduce a highly quantitative flow cytometry assay for evaluating E-selectin binding.
• To detail the procedure and provide tips for performing this assay on colon cancer cells undergoing EMT.
• To offer a refined method for studying selectin-mediated cell-cell interactions.

Main Methods:

• Utilized recombinant selectin-Ig(Fc) chimera proteins for binding assays.
• Employed flow cytometry for highly quantitative measurements.
• Focused on assessing E-selectin binding to colon cancer cells during EMT.

Main Results:

• The developed flow cytometry assay provides a quantitative measure of E-selectin binding.
• The assay is applicable to colon cancer cells undergoing epithelial-mesenchymal transition.
• The procedure and tips enhance the reliability and accuracy of E-selectin binding assays.

Conclusions:

• Flow cytometry offers a powerful and quantitative approach to study selectin-mediated cell-cell interactions.
• This assay is valuable for investigating the role of E-selectin in cancer progression, specifically during EMT.
• The methodology presented can advance research in immunology and cancer metastasis.