RESUMEN
Objective To analyze the gene expression profiles of nasal polyp and gene expression differences between the nasal polyp and normal nasal mucosa.Methods Total RNA from nasal polyp tissues was purified and synthesized into double-stranded cDNA.The cDNA was labeled and hybridized in a NimbleGen hybridization chamber.The slides were scanned using the Axon GenePix 4000B microarray scanner.Scanned images were analyzed using NimbleScan software.The probes and gene levels were standardized and calculated.Results Compared with normal nasal mucosa tissues,expression of 2.22％ (1 000/45 033) of genes was up-regulated in all cases of nasal polyp tissues,while 2.49％ (1 123/45 033) of genes were down-regulated in all cases of nasal polyp tissues.We found genes related to the ribosome,proteasome,citrate cycle (TCA cycle),bladder cancer,non-small cell lung cancer,glioma,endometrial cancer,protein processing in the endoplasmic reticulum,chronic myeloid leukemia,and glutathione metabolism were up-regulated.Genes related to olfactory transduction,natural killer cell-mediated cytotoxicity,metabolism of xenobiotics by cytochrome P450,drug metabolism-cytochrome P450,antigen processing and presentation,malaria,graft-versus-host disease,retinol metabolism,linoleic acid metabolism,and pentose and glucuronate interconversions were down-regulated.Conclusion Multiple genes or pathways may be involved in the occurrence and development of nasal polyp.Gene expression profiling provides insight into the mechanism of nasal polyp development.