Gene expression and protein levels were also analyzed in cultured THP-1 cells.<h4>Results</h4>In eosinophilic chronic rhinosinusitis nasal polyps, angiotensin-converting enzyme 2, Mas receptor, and angiotensin (1-7) were significantly reduced, while angiotensin II receptor type 1 was increased compared to non-eosinophilic chronic rhinosinusitis nasal polyps. This evidence concerns the gene AGTR1 and nasal cavity polyp.