SPP1 and Nasal polyposis: Based on these results, OPN may act as a trigger to further accelerate the inflammation of CRSwNP in the early stage and to induce the formation of nasal polyp through the induction of irreversible tissue remodeling in the nasal cavity We plan to further investigate the effect of OPN in an eosinophilic mouse model made with Staphylococcal enterotoxin B (SEB) and OVA.