RNA-seq analysis of miR-324-5p overexpression upon H5N1 infection in A549 cells
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ABSTRACT: The goals of this study are to compare NGS-derived whole transcriptome profiles (RNA-seq) of H5N1 infected A549 cells overexpressing either negative control mimic or miR-324-5p mimic
Project description:MicroRNA-203 was up-regulated markedly upon H5N1 virus infection. To identify the potential target genes of miR-203, we constructed a miR-203 knockout A549 cell line. Then wild-type and miR-203 knockout A549 cells were mock-infected or infected with H5N1 virus for 48h. The Agilent Whole Human Genome Oligo Microarray was performed to analyze the mRNA expression profiling. Meanwhile, the online tool TargetScanHuman (http://www.targetscan.org/vert_71/) was used to predict biological targets of miR-203. We combined the predicted genes with the genes differentially expressed in wild-type and miR-203 knockout A549 cells, and preliminarily identified some candidate mRNAs. Then more experiments were performed to further verify these target genes, such as dual-luciferase reporter assay, quantitative real-time PCR or Western blot analysis.
Project description:To study miRNA expression profiles during highly pathogenic avian influenza virus infection, we conducted global miRNA expression profiling in human lung epithelial cells (A549) with or without H5N1 IAV infection. .
Project description: microRNAs are non-coding RNAs which modulate the expression of other RNA molecules. One microRNA can target many transcripts, allowing each microRNA to play key roles in many biological pathways. miR-324 is a microRNA previously implicated in bone and cartilage maintenance, defects of which result in common age-related diseases, such as osteoporosis or osteoarthritis (OA). Cartilage damage was increased in both surgically and ageing-induced OA however changes in the cartilage transcriptome were minimal, with few miR-324 predicted targets dysregulated. However, in vivo micro-computed tomography and histology demonstrated that global miR-324-null mice had an increase in bone mineral density, trabecular thickness and cortical thickness, with many parameters increasing with age. The bones of the miR-null mice also had decreased osteocytes numbers and lipid droplets. In vivo TRAP staining revealed a decrease in osteoclasts with histomorphometry demonstrating an increased rate of bone formation in miR-324-null mice. Ex vivo assays revealed that the high bone mass phenotype of the miR-324-null mice resulted from increased osteoblast activity and decreased osteoclastogenesis. RNA-seq and qRT-PCR followed by miR-324 target prediction and validation in osteoblasts, bone marrow macrophages and osteocytes, revealed that the osteoclast fusion regulator Pin1 was a miR-324 target in the osteoclast lineage, Hoxa9 and Samd5 were osteocyte target genes and the master osteogenic regulator Runx2 was a target of miR-324-5p in osteoblasts, the in vitro overexpression of which recapitulated the increased osteogenesis and decreased adipogenesis phenotype observed in vivo. These data point to important roles of miR-324 in skeletal biology. Elucidation of pathways regulated by miR-324 offers promise for the treatment of bone diseases such as osteoporosis.
Project description:microRNAs are non-coding RNAs which modulate the expression of other RNA molecules. One microRNA can target many transcripts, allowing each microRNA to play key roles in many biological pathways. miR-324 is a microRNA previously implicated in bone and cartilage maintenance, defects of which result in common age-related diseases, such as osteoporosis or osteoarthritis (OA). Cartilage damage was increased in both surgically and ageing-induced OA however changes in the cartilage transcriptome were minimal, with few miR-324 predicted targets dysregulated. However, in vivo micro-computed tomography and histology demonstrated that global miR-324-null mice had an increase in bone mineral density, trabecular thickness and cortical thickness, with many parameters increasing with age. The bones of the miR-null mice also had decreased osteocytes numbers and lipid droplets. In vivo TRAP staining revealed a decrease in osteoclasts with histomorphometry demonstrating an increased rate of bone formation in miR-324-null mice. Ex vivo assays revealed that the high bone mass phenotype of the miR-324-null mice resulted from increased osteoblast activity and decreased osteoclastogenesis. RNA-seq and qRT-PCR followed by miR-324 target prediction and validation in osteoblasts, bone marrow macrophages and osteocytes, revealed that the osteoclast fusion regulator Pin1 was a miR-324 target in the osteoclast lineage, Hoxa9 and Samd5 were osteocyte target genes and the master osteogenic regulator Runx2 was a target of miR-324-5p in osteoblasts, the in vitro overexpression of which recapitulated the increased osteogenesis and decreased adipogenesis phenotype observed in vivo. These data point to important roles of miR-324 in skeletal biology. Elucidation of pathways regulated by miR-324 offers promise for the treatment of bone diseases such as osteoporosis.
Project description:We analyzed the expression profiles of hsa-miR-145-5p or hsa-miR-31-5p-targeting genes relating to invasion or migration after co-overexpression of hsa-miR-145-5p and 31-5p Gene expression profiles of U87 cells after co-transfection with hsa-miR-145-5p and 31-5p mimics, and U87 cells after transfection miR mimic negative control
Project description:microRNAs are non-coding RNAs which modulate the expression of other RNA molecules. One microRNA can target many transcripts, allowing each microRNA to play key roles in many biological pathways. miR-324 is a microRNA previously implicated in bone and cartilage maintenance, defects of which result in common age-related diseases, such as osteoporosis or osteoarthritis (OA). Cartilage damage was increased in both surgically and ageing-induced OA however changes in the cartilage transcriptome were minimal, with few miR-324 predicted targets dysregulated. However, in vivo micro-computed tomography and histology demonstrated that global miR-324-null mice had an increase in bone mineral density, trabecular thickness and cortical thickness, with many parameters increasing with age. The bones of the miR-null mice also had decreased osteocytes numbers and lipid droplets. In vivo TRAP staining revealed a decrease in osteoclasts with histomorphometry demonstrating an increased rate of bone formation in miR-324-null mice. Ex vivo assays revealed that the high bone mass phenotype of the miR-324-null mice resulted from increased osteoblast activity and decreased osteoclastogenesis. RNA-seq and qRT-PCR followed by miR-324 target prediction and validation in osteoblasts, bone marrow macrophages and osteocytes, revealed that the osteoclast fusion regulator Pin1 was a miR-324 target in the osteoclast lineage, Hoxa9 and Samd5 were osteocyte target genes and the master osteogenic regulator Runx2 was a target of miR-324-5p in osteoblasts, the in vitro overexpression of which recapitulated the increased osteogenesis and decreased adipogenesis phenotype observed in vivo. These data point to important roles of miR-324 in skeletal biology. Elucidation of pathways regulated by miR-324 offers promise for the treatment of bone diseases such as osteoporosis.
Project description:To investigate the difference of miRNA expression between lung cancer cell A549 and its DDP-resistant cell strain A549/DDP, we have employed miRNA microarray expression to discover the difference expression of miRNAs of A549 cells and A549/DDP. We conducted RT-qPCR to examine the expression levels of top differential expressed miRNAs, namely, miR-197-5p, miR-4443, miR-642a-3p, miR-27b-3p and miR-100-5p, confirming low variability between two methods. The A549/DDP was established from A549 in our laboratory, by exposing A549 to gradually increasing DDP concentrations, until the final concentration at 1μg/ml. To avoid the influence of drug to the A549/DDP cells, they were cultured in a drug-free medium for at least two weeks before gene expression analysis. miRNA expression of A549 and A549/DDP was then analzyed.