RESUMEN
Objective:To screen the differentially expressed miRNAs in umbilical cord tissue of children with nonsyndromic cleft lip and/or cleft palate( NSCL/P) using miRNA microarray and comprehensive bioinformatics analysis for the prediction of related the bio-logical process and signaling pathways. Methods:Umbilical cord tissues of 4 cases of healthy newborns' and 4 lip or palate tissues of 4 cases with NSCL/P without other disease aged younger than 2 years were collected. The differentially expressed miRNAs were screened by miRNA microarray. Targets of dysrugulated miRNAs were predicted by TARGETSCAN-VERT, MIRDB and RNA22-HSA. All the gene sets were analyzed by gene ontology and pathway enrichment. Results: MiRNA microarray demonstrated that 254 miRNAs were dysregulated(181 miRNAs were up-regulated and 73 downregulated,P <0. 05). The dysregulated miRNAs targets contained 5029 genes. The dysregulated miRNAs targets were enriched in anatomical structure development,cell adhesion,cell proliferation,cell motili-ty and other biological processes. The dysregulated miRNAs targets were enriched in Wnt, mTOR, cGMP-PKG, TGFβ, PI3K-Akt and other signaling pathways. Conclusion:The target genes set of miRNAs are enriched in multiple biological processes and signaling path-ways related to NSCL/P, which indicate that genetic and environmental factors may influence the development process of NSCL/P.