Project description:Due to microRNAs' (miRs) important functions and high potential for disease diagnosis and therapy, increasing efforts have been put to understand their role in wound repair and identify targetable miRs for wound treatment. However, lack of knowledge about miR-mediated gene expression in human wound tissues hinders the recognition of clinically relevant miRs. Here we profiled genome-wide miR and mRNA expression by RNA-sequencing in the same set of samples from human normal acute wounds and chronic non-healing venous ulcers (VU). By integrative analysis of miR and mRNA omics, we unraveled miR-mediated gene regulatory networks specifically associated with different phases of wound repair or VU. We also identified transcriptional factors and miR arm switching events underpinning the dynamically changed miR expression. In this study, we focused on not only a few top changed miRs, but also the miRs with their targetome enriched in the VU gene signature, such as miR-34a-5p, miR-34c-5p, miR-218-5p, miR-7704, miR-424-5p, miR-450-5p, miR-517b-3p, miR-96-5p, and miR-516b-5p. We confirmed these miRs' targetome in human keratinocytes and fibroblasts using microarrays and demonstrated their functional relevance to VU pathology.
Project description:We identified pathologically relevant miRs that exhibited abnormal VU expression and displayed their targets enriched explicitly in the VU gene signature. The biological function of these miRNAs in human epidermal keratinocytes or fibroblasts during wound repair remains unclear. To study the genes regulated by miR-96-5p, miR-218-5p, miR-424-5p, miR-450b-5p, miR-516b-5p or miR-7704, we transfected miRNA mimics into human primary epidermal keratinocytes or fibroblasts to overexpress respective miRNA expression. We performed a global transcriptome analysis of keratinocytes or fibroblasts upon miRNA overexpression using Affymetrix arrays.
Project description:Liver cancer was the fourth leading cause of cancer-related deaths worldwide in 2018, of which Hepatocellular carcinoma accounts for 75-85% of all liver cancers and is therefore the most common type of liver cancer. In this study, total RNA were extracted from sections of formalin-fixed paraffin embedded (FFPE) archival human liver biopsies from 24 patients, including ten HCV-associated HCC (HCV-HCC), ten virus-unrelated HCC (VU-HCC) and four normal liver patients. By comparing the expression profiles of HCV-HCC and VU-HCC to that of the normal liver biopsies respectively, 18 lncRNAs were identified to be differentially expressed.
Project description:miR-144/451 cluster is highly conversed in different species, miRbase database shows miR-144/451 cluster is constituted by miR-144-3p, miR-144-5p, miR-451a. Low-expression of miR-144/451 was closely related with the risk for esophageal cancer We used microarrays to identify the differentially expressed genes in ECa9706 over expressing miR-144/451 cluster
