“…miR-29b-3p has been found to directly target MMP-9 mRNA and that miR29b3p expression is moderately positively correlated with the expression of MMP-9 in CRSwNPs 6 . Other miRNAs that directly or indirectly affect MMP-9 expression include let-7e 7 , miR-129, miR-335 8 , miR-211 9 , miR-491-5p 10 and miR-1253 11 . Moreover, novel classes of ncRNAs that can regulate gene expression are tRNA-derived fragments (tRFs) and long ncRNAs 12 , 13 , whose role in the pathogenesis of CRSwNP remains to be elucidated.…”