[Expression of Foxm1 in chronic sinusitis and itsrelationship with MUC5AC].

To explore the expression of Forkhead box protein m1(Foxml) in the sinus mucosa of patients with chronic rhinosinusitis(CRS) and the relationship between Foxm1 and MUC5AC for further understanding of the pathogenesis of CRS.We obtained the sinus mucosa from 25 CRS with polyps(CRSwNP) patients and 25 CRS without polyps (CRSsNP) patients as two experimental groups.Nasal mucosa from 15 normol cases were obtained as control group.We used HE,Periodic acid-schiff staining to observe the histopathological change of each sample.The expression of Foxm1 and MUC5AC were determined by immunohistochemistry(IHC) and qRT-PCR in each group.We also analysed the relationship between Foxm1 and MUC5AC.The HE and PAS staining showed that in the CRSwNP and CRSsNP patients,the main histopathological features was the hyperplasia of goblet cell,inflammatory cell and submucosal gland.IHC showed that Foxm1 and MUC5AC expression were higher in CRSwNP and CRSsNP compared with normal sinus mucosa.qRT-PCR also revealed that Foxm1 and MUC5AC expression was higher in CRSwNP and CRSsNP than in normal mucosa(<0.05).Foxm1 and MUC5AC had a significant positive correlation.The expressions of Foxm1 and MUC5AC were increased in CRS,and Foxm1 may play an important role in the process of hypersecretion of MUC5AC in CRS.