Adolescent ; Adult ; Child ; Chronic Disease ; Female ; Humans ; Male ; Middle Aged ; Mucin-5B ; biosynthesis ; Nasal Mucosa ; metabolism ; Sinusitis ; metabolism ; Young Adult

OBJECTIVE: To detect the mucin gene (MUC2, MUC5AC, MUC5B, MUC18 and MUC19) expression in the nasal polyps, allergic rhinitis (AR) and the normal nasal mucosa in human. To investigate the role and clinical significance of mucin gene in the pathogenesis of nasal polyps and AR patients. METHOD: We obtained samples from 35 cases of nasal polyps, 18 cases of AR inferior turbinate and 18 cases of simple nasal septum deviation inferior turbinate. Specimens were analyzed with RT-PCR and Real-time FQ-RT-PCR. RESULT: The results of RT-PCR and FQ-RT-PCR showed that the expression of MUC5AC, MUC5B in nasal polyps and AR patients was significantly higher than that in normal mucosa (P<0.05). The expression of MUC5AC, MUC5B in nasal polyps was not significantly different from that in AR patients (P>0.05). The expression of MUC2, MUC18 in nasal polyps and AR was not significantly different from that in normal mucosa (P>0.05). And the results of RT-PCR for MUC19 expression in AR was higher than that in nasal polyps group and normal group (P<0.05 or P<0.01). CONCLUSION MUC5AC and MUC5B are highly expressed in epithelium of human nasal polyps and AR, and they take part in mucus over-secretion in nasal polyps and AR. The expression of MUC19 in AR was higher than that in nasal polyps group and normal group. It indicates that the secretion of MUC19 in allergic rhinitis was on high level. There was no difference of the expression of MUC2 and MUC18 in nasal polyps group, AR group and in normal group.
Adolescent ; Adult ; Female ; Gene Expression ; Humans ; Male ; Middle Aged ; Mucin 5AC ; genetics ; Mucin-2 ; genetics ; Mucin-5B ; genetics ; Mucins ; genetics ; metabolism ; Nasal Mucosa ; metabolism ; pathology ; Nasal Polyps ; genetics ; metabolism ; Rhinitis ; genetics ; metabolism ; Young Adult

OBJECTIVE: To demonstrate the effects of IL-1beta on MUC2/MUC5B gene expression in cultured human nasal epithelial cells. METHOD: In passage-2 cultured human nasal epithelial cells, the mRNA levels of MUC2/MUC5B gene expression induced by IL-1 beta were determined by fluorescent quantitative RT-PCR. RESULT: MUC2/MUC5B mRNAs were detected after 24 h of exposure to IL-1beta. MUC2 mRNA levels in IL-1 beta treatment [(39.26 +/- 6.10) x 10(4) copy/microg] were significantly higher than control [(5.70 +/- 4.16) x 10(4) copy/microg] (P < 0.01). MUC5BmRNA levels in IL-1beta treatment [(5.7 +/- 2.06) x 10(5) copy/microg] were significantly higher than control [(1.11 +/- 0.72) 10(5) copy/microg] (P < 0.05). CONCLUSION IL-1 beta increased MUC2/MUC5B mRNA levels in human nasal epithelial cells. These results suggest that IL-1beta may enhance mucin gene expression in cultured human nasal epithelial cells.
Cells, Cultured ; Epithelial Cells ; drug effects ; metabolism ; Humans ; Interleukin-1beta ; pharmacology ; Mucin-2 ; genetics ; metabolism ; Mucin-5B ; genetics ; metabolism ; Nasal Mucosa ; cytology ; drug effects ; metabolism ; RNA, Messenger ; genetics ; Up-Regulation

OBJECTIVETo differentiate between Aspergillus species and Mucorales of fungal sinusitis by immunohistochemistry.

METHODSFormalin-fixed paraffin-embedded tissue blocks of 66 cases of fungal sinusitis were retrieved from the archival files of Department of Pathology of Beijing Tongren Hospital during the period from 2001 to 2006. The samples included 29 cases of fungal balls, 12 cases of allergic fungal sinusitis, 24 cases of chronic invasive fungal sinusitis and 1 case of acute invasive fungal sinusitis. The types of fungi were 44 Aspergillus species (31 cases of A. fumigatus, 7 cases of A. flavus and 6 cases of A. terreus) and 22 Mucorales (14 cases of Mucor species and 8 cases of Rhizopus species). Immunohistochemistry was performed with MUC2, MUC5AC and MUC5B antibodies. The results were compared with histochemical study for periodic acid-Schiff (PAS) and Grocott methenamine silver (GMS) stains.

RESULTSImmunohistochemical study for MUC5B showed that the positive rate of Aspergillus species was 90.9%, in contrast to 4.5% in Mucorales (P < 0.001). The expression of MUC2 and MUC5AC was completely negative, whereas PAS and GMS stains were positive in all cases.

CONCLUSIONMUC5B antibody appears to be a useful immunohistochemical marker for identifying fungal types in tissue sections, especially in distinguishing between Aspergillus species and Mucorales in fungal sinusitis.

Antibodies, Fungal ; immunology ; Antibody Specificity ; immunology ; Aspergillosis ; diagnosis ; immunology ; Aspergillus flavus ; immunology ; Aspergillus fumigatus ; immunology ; Diagnosis, Differential ; Humans ; Immunohistochemistry ; methods ; Mucin-5B ; genetics ; immunology ; Mucor ; immunology ; Mycoses ; diagnosis ; immunology ; microbiology ; Sinusitis ; diagnosis ; microbiology