Galectin-10 Silencing Reduces Eosinophilic Inflammation in Chronic Rhinosinusitis with Nasal Polyps by Inhibiting the p38/MAPK/NF-κB Pathway

Galectin-10(Gal-10)/CLC(Charcot-Leyden crystal) has been discovered to be related to ECRSwNP characterized by high eosinophilic infiltration. We aimed to investigate the effects of Gal-10 on ECRSwNP. A total of 36 tissue samples were collected, including 11 ECRSwNP samples, 15 non-ECRSwNP samples, and 10 Control samples. Human eosinophils were divided into 3 groups: Control, siRNA-NC, and Gal-10 interference groups. Immunohistochemistry (IHC), Western blotting and quantitative real-time PCR (qRT-PCR) detected the expression of Gal-10 in the tissues samples and expression of p-p38 and p-p65 in human eosinophils. Enzyme-Linked Immunosorbent Assay (ELISA) was adopted to measure the expression levels of IL-4, IL-5, IL-8, MBP, ECP, and TNF-&alpha; in the human eosinophils. We found the expression of Gal-10 was significantly higher in ECRSwNP group (<i>P</i> &#60; 0.05). The expression levels of IL-4, IL-5, IL-8, MBP and TNF-&alpha; in the Gal-10 interference group were lower (<i>P</i> &#60; 0.05), but ECP had no statistical difference in human eosinophils. There showed the expression levels of p-p38 and p-p65 proteins in the Gal-10 interference group were lower (<i>P</i> &#60; 0.05). The deletion of Gal-10 in eosinophils down-regulates the expression of cytokines and granule cationic proteins in ECRSwNP which may be caused by the p38MAPK/ NF-&kappa;B pathway.