ABSTRACT
<p><b>OBJECTIVE</b>To compare the molecular basis difference between recurrent respiratory papillomatosis (RRP) and vocal cord polyp, to analyze the expression of glycan structural genes, and to discuss the pathopoiesis mechanism of RRP.</p><p><b>METHODS</b>The gene expressing profile between the 3 groups papilloma and the vocal cord polyp regarded as normal larynx epithelium were compared using mRNA parallel amplify and the human genome gene expressing microarray. Through cluster analysis, Gene Ontology function gene annotation and path way analysis, the relative gene of RRP and HPV infection were acquired.</p><p><b>RESULTS</b>According to three microarrays results, total 567 expression changed genes related to HPV induce RRP were acquired. A serial change of glycan structure biosynthesis and degradation pathways was significant. The expression of dolichyl-phosphate mannosyltransferase polypeptide 1 (DPM1), asparagine-linked glycosylation 1 homolog (ALG1), fucosyltransferase 8 (FUT8) and alpha-mannosidase 1A (MAN1A) were regulated and beta-hexosaminidase (HEXB), beta1-galactosidase (GLB1), exostoses 1 (EXT1), fucosyltransferase (FUT) reduced expression and heparan sulfate 3-O-sulfotransferase 1 (HS3ST3A1) increased expression. The two related enzymes of the glycosphingolipids which is the main composed of the cell membrane, beta-3-N-acetylglucosaminyltransferase 4 (B3GNT4) and UDP-glucose ceramide glucosyltransferase (UGCG) increase expression, HEXB and GLB1 reduced expression.</p><p><b>CONCLUSIONS</b>The alteration of the coding genes of glycan structure biosynthesis and degradation pathways were significantly and characteristically in pathopoiesis mechanism of RRP. This abnormality may be the beginning of tumor form HPV infection.</p>