ErbB1 and ErbB2 overexpression in patients with sinonasal inverted papilloma and inverted papilloma with squamous cell carcinoma in China.

Currently, the expression patterns of epidermal growth factor receptor (EGFR) family genes in sinonasal inverted papilloma (SNIP) and inverted papilloma with squamous cell carcinoma (IPwSCC) are not clear. This study aimed to investigate the expression of EGFR family members and their ligands in SNIP and IPwSCC and to analyze their correlations with SNIP histological grade and Krouse stage. Data from 25 cases of inverted papilloma patients in China were collected and divided into 16 cases in the SNIP group and 9 in the IPwSCC group. In addition, eight cases of normal nasal mucosa (NNM) were collected and used as the control group. The expression levels of EGFR family members and their ligands in the NNM and SNIP groups and EGFR family members in the IPwSCC group were evaluated using immunohistochemistry and qRT-PCR. In addition, their correlations with the SNIP histological grade and Krouse stage were analyzed. The statistical analysis was performed using the GraphPad Prism 7.0 statistical software. The ErbB1 and ErbB2 mRNA and protein expression levels were significantly higher in the SNIP group than in the NNM group ( < .01). The ErbB1 and ErbB2 protein expression levels were significantly higher in the IPwSCC group than those in the NNM and SNIP groups ( < .01). The ErbB1 and ErbB2 mRNA and protein expression levels in the SNIP group were positively correlated with the SNIP dysplasia grade. Upregulation of ErbB1 and ErbB2 expression may be associated with SNIP pathogenesis and carcinogenesis.