CFTR expression analysis in human nasal epithelial cells by flow cytometry

Area of Science:

• Cellular Biology
• Immunology

Background:

• Aberrant protein expression in airway epithelial cells is key to understanding airway diseases.
• Single-cell analysis offers improved diagnostic and research potential.
• Cystic Fibrosis (CF) research benefits from precise molecular-level understanding.

Purpose of the Study:

• Validate CFTR-directed monoclonal antibodies for flow cytometry.
• Analyze CFTR expression in nasal epithelial cells from CF patients and healthy controls.

Main Methods:

• Utilized multicolor flow cytometry for single-cell analysis of CFTR expression.
• Employed intracellular staining for CFTR in primary nasal epithelial cells.
• Differentiated epithelial cells from leukocytes using pan-Cytokeratin, E-cadherin, and CD45 markers.

Main Results:

• Identified diverse nasal cell populations expressing varying CFTR protein levels.
• Observed lower CFTR protein levels in CF patients homozygous for F508del compared to healthy controls.

Conclusions:

• CFTR protein is present in CF patients with F508del mutations, but at reduced levels.
• Multicolor flow cytometry provides a straightforward method for analyzing nasal cell subpopulations and protein expression at the single-cell level.