Galectin-10 as a Potential Biomarker for Eosinophilic Diseases

Area of Science:

• Immunology
• Cell Biology
• Biochemistry

Background:

• Galectin-10 is a lectin family member, predominantly found in human eosinophils.
• It forms Charcot-Leyden crystals, characteristic of eosinophilic diseases.
• Galectin-10 is increasingly recognized for its role beyond a mere marker.

Purpose of the Study:

• To review the relationship between eosinophils and galectin-10.
• To highlight galectin-10 as a potential biomarker for eosinophilic diseases.
• To discuss the functional roles of galectin-10 in immunity.

Main Methods:

• Literature review focusing on galectin-10 and eosinophils.
• Analysis of studies on galectin-10 as a biomarker.
• Examination of galectin-10 release mechanisms and functional roles.

Main Results:

• Galectin-10 is highly specific to eosinophils, except in certain leukemia and T cell populations.
• Extracellular galectin-10 release occurs via eosinophil extracellular trap cell death (ETosis), not conventional secretion.
• Elevated galectin-10 levels correlate with increased eosinophil ETosis and disease activity.

Conclusions:

• Galectin-10 is a key protein in eosinophils and a potential biomarker for asthma, eosinophilic esophagitis, and other eosinophilic conditions.
• The release mechanism via ETosis provides insight into eosinophil activation.
• Galectin-10/Charcot-Leyden crystals play active roles in immunity, not just as disease markers.