Serum miRNA Seq of Children with Asthma in Costa Rica
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE244573 | GEO | 2023/10/09
REPOSITORIES: GEO
Similar Datasets
Project description:Rationale: MicroRNAs have emerged as crucial post-transcriptional and network regulators in inflammatory diseases, including asthma. We hypothesized that peripheral blood miRNA would be associated with airflow obstruction in children with asthma, and that some of these effects would also be observable in adults with COPD. Methods: We analyzed small RNA-Seq data from 365 peripheral blood samples from the Genetics of Asthma in Costa Rica Study (GACRS). GACRS comprised children from the Central Valley of Costa Rica age 6-14 years with physician-diagnosed asthma and ≥2 respiratory symptoms or asthma attacks in the prior year. FEV1/FVC percent-predicted was dichotomized at 100%, splitting the cohort into those with and without evidence of airflow obstruction and used as our primary outcome. Differentially expressed (DE) miRs were identified using the DESeq2 package in R with a 10% FDR and adjustment for age, gender, and inhaled corticosteroid (ICS) use. We attempted to replicate the top airflow obstruction-associated microRNAs from the GACRS study in the COPDGene study, in which blood microRNA data were available in 439 current and former smoking adults with and without airflow obstruction (defined as raw FEV1/FVC < 0.7). Results: After QC, we had 361 samples and 649 miRs for DE analysis. Of the 361 samples, 220 and 141 were from subjects without and with airflow obstruction, respectively. We found 1 upregulated (let-7e-5p p=0.0004) and 2 downregulated (miR-342-3p p=0.0002; miR-671-5p p=0.0001) miRs in subjects with airflow obstruction compared to those without airflow obstruction. These three miRNAs were then tested for association with airflow obstruction in the COPDGene study, in which let-7e-5p was upregulated (p = 0.064) and miR-342-3p (p =0.085) was downregulated in participants with FEV1/FVC < 0.7 (n=196) compared to those with FEV1/FVC > 0.7 (n=243). Differentially expressed miR’s target genes were enriched for PI3K-Akt, Hippo, WNT, MAPK, and focal adhesion signaling pathways. We also separately considered the targets of only the two miRNAs that were also associated with FEV1/FVC in the adult current and former smokers, where PI3K-Akt, MAPK and Hippo signaling pathways were among the top five most enriched pathways. Conclusion: Three DE miRs were linked to airflow obstruction in children with asthma. Two miRs were associated with FEV1/FVC in current and former smoking adults. These miRs were involved in asthma and COPD-related pathways: PI3K-Akt, Hippo, MAPK, and focal adhesion signaling pathways. Together these findings provide important evidence that these two disorders may share genetic regulatory systems that contribute to airflow obstruction.
2023-10-01 | GSE244036 | GEO
Project description:Abstract: Background: The severity of visceral adipose tissue (VAT) inflammation in individuals with obesity is thought to signify obesity sub-phenotype(s) associated with higher cardiometabolic risk. Yet, this tissue is not accessible for direct sampling in the non-surgical patient. We hypothesized that circulating miRNAs (circ-miRs) could serve as biomarkers to distinguish human obesity subgroups with high or low extent of VAT-inflammation. Methods: Discovery and validation cohorts of patients living with obesity undergoing bariatric surgery (n=35 and 51, respectively) were included. VAT inflammation was classified into low/high based on an expression score derived from the mRNA levels of TNFA, IL6 and CCL2 (determined by rtPCR). Differentially-expressed circ-miRs were identified, and their discriminative power to detect low/high VAT inflammation was assessed by ROC-AUC analysis. Results: Fifty three out of 263 circ-miRs (20%) were associated with high VAT inflammation according to Mann-Whitney analysis in the discovery cohort. Of those, 12 (12/53=23%) were differentially expressed according to Deseq2, and 6 significantly discriminated between high and low VAT inflammation with ROC-AUC>0.8. Of the resulting 5 circ-miRs that were differentially abundant in all three statistical approaches, 3 were unaffected by hemolysis and validated in an independent cohort. Circ-miRs 181b-5p, 1306-3p, and 3138 combined with HOMA-IR exhibited ROC-AUC of 0.951 (95%CI:0.865-1) and 0.808 (95%CI:0.654-0.963) in the discovery and validation cohorts, respectively, providing strong discriminative power between participants with low versus high VAT inflammation. Predicted target genes of these miRNAs are enriched in pathways of insulin and inflammatory signaling, circadian entrainment, and cellular senescence. Conclusions: Circ-miRs that identify patients with low versus high VAT inflammation constitute a putative tool to improve personalized care of patients with obesity.
2023-09-20 | GSE240273 | GEO
Project description:We used an MNase digestion of chromatin from Arabidopsis seedlings, combined or not with ChIP (native ChIP), to analyze by high-throughput sequencing the genome-wide profiles of nucleosomes (MNase-seq), and of total H3, H3K4me2, H3K4me3 and H3K36me3 (native ChIPs) in wild-type (Col-0), fpa mutant (fpa/AT2G43410, line fpa-7) and a triple mutant of all three BDR proteins (bdrs: cross of bdr1/AT5G25520 mutant SALK_142108C, bdr2/AT5G11430 mutant CS852350 and bdr3/AT2G25640 mutant SALK_059905). We found that BDR proteins occupy regions of low nucleosome density. We also observed that genes upregulated in bdrs triple mutant display high levels of RNA polymerase II on their gene bodies but low levels of H3K4me3 and H3K36me3 in wild-type seedlings. For genes with the highest levels of BDR occupancy in wild-type, increased mRNA expression in bdrs mutant is associated with reduced RNA polymerase II density profile and increased H3K4me3 and H3K36me3 levels.
2019-08-08 | GSE113076 | GEO
Project description:Background: MicroRNAs (miRs) are small non-coding RNAs that regulate gene (mRNA) expression. Although pathological role of miRs have been studied in muscle wasting conditions such as age, obesity, starvation and muscular dystrophy, their roles in Cancer Cachexia CC are still emerging. Objectives: (i) to profile human skeletal muscle expressed miRs; (ii) to identify differentially expressed (DE) miRs between cachectic and non-cachectic cancer patients; (iii) to identify mRNA targets for the DE miRs to gain mechanistic insights and (iv) to investigate if miRs show potential prognostic and predictive value. Methods: 43 cancer patients were included, of which 19 were cachectic cases exhibiting pre-illness weight loss ≥ 5% and 24 non-cachectic cancer controls who were weight stable in the preceding 6 months. Total RNA isolated from muscle biopsies were subjected to next generation sequencing (NGS). Results: 781 miRs were profiled and 82 miRs with read counts of ≥ 5 in 80% of samples were retained for analysis. We identified 7 DE miRs (up-regulated, fold change of ≥1.4 at p< 0.05). Potential mRNA targets for the DE miRs were identified using previously described human skeletal muscle mRNA expression data (n=90) and identified 212 potential mRNA targets. Ingenuity Pathway Analysis identified 41 pathways (p<0.05) including pathways of myogenesis and inflammation. qRT-PCR analysis of representative miRs, showed similar direction of effect (p<0.05) as in NGS. And lastly, we evaluated the identified miRs for prognostic and predictive value. Conclusions: We identified seven novel miRs associated with CC and pathways that are regulated in CC.
2017-01-09 | GSE75473 | GEO
Project description:MicroRNAs (miRNAs) are a class of small non-coding RNAs that regulate protein gene expression post-transcriptionally. By base pairing with target mRNAs, miRNAs triggers mRNA degradation or translational suppression[1-4]. Abnormal miRNAs levels are associated with cancers, diabetes, neurological and other diseases[5-8]. RNA polymerase II transcribes primary miRNA (pri-miR) in the nucleus and pri-miRs are subsequently processed by Microprocessor, which is composed of Drosha and DiGeorge syndrome critical region 8 (DGCR8) proteins, to generate precursor miRNAs (pre-miRs). Pre-miRs are exported from the nucleus to the cytoplasm in a GTP-dependent manner by Exportin-5. In the cytoplasm, a pre-miRs are further processed by Dicer to generate 21-22 nt mature miRNA[4, 9]. Argonaute (Ago) protein loads one of mature miRNAs into protein and forms miRNA-induced silencing complex, which is responsible for mRNA degradation or translational suppression[2, 4].
2023-04-24 | GSE230167 | GEO
Project description:The ‘Genetic Epidemiology of Asthma in Costa Rica’ is a family-based cross-sectional cohort ascertained between February 2001 and August 2008 on a Hispanic population isolate from the Central Valley of Costa Rica. The study recruited children between 6 to 14 years of age with moderate persistent asthma.
2022-05-21 | GSE203482 | GEO
Project description:Purpose of the current study was to identify miRs that can differentiate between patients with and without local relapse after breast conserving therapy in early stage breast cancer, which is especially important in the context of individualized treatment selection. The study was conducted in a pilot and a validation phase. First, 32 patients were screened for the most de-regulated miRs in a panel of 1250 miRs by microarray technology. Second, the candidate miRs were analyzed in an independent cohort of 115 patients using reverse transcription quantitative polymerase chain reaction (RT-qPCR).
2015-06-18 | E-GEOD-69951 | biostudies-arrayexpress
Project description:Estrogen Receptor B (ERB) is a member of the nuclear receptor family of homeostatic regulators that is frequently lost in breast cancer (BC), where its presence correlates with a better prognosis and a less aggressive clinical outcome of the disease. Contrary to ERα, its closest homolog, ERB shows also significant estrogen-independent activities, including the ability to inhibit cell cycle progression and to regulate gene transcription in the absence of the ligand. Investigating the nature and extent of this constitutive activity of ERB in BC MCF-7 cells by miRNA-Seq, we identified 127 miRNAs differentially expressed in ERB+ vs ERB- cells in the absence of ligand, including upregulated oncosuppressor miRs, such miR-30a, and downregulated onco-miRs, like miR-21. In addition, a significant fraction of >1,600 unique proteins identified in these cells by iTRAQ (isobaric Tag for Relative and Absolute Quantitation) quantitative proteomics was either increased or decreased by ERB, revealing regulation of multiple cell pathways by ligand-free receptor. Transcriptome analysis indicates that for a large number of proteins regulated by ERB the corresponding mRNAs are unaffected, including a large number of putative targets of ERB-regulated miRNAs, indicating a central role of miRNAs in mediating BC cell proteome regulation by ERB. Expression of a mimic of miR-30a-5p, a direct target and downstream effector of ERB in BC, led to the identification of several target transcripts of this miRNA, including 11 encoding proteins whose intracellular concentration is significantly affected by unliganded receptor. These results demonstrate a significant effect of ligand-free ERB on BC cell functions via modulation of the cell proteome and suggest that miRNA regulation may represent a key event in the control of the biological and clinical phenotype of hormone-responsive BC by this nuclear receptor.
2014-10-23 | PXD000499 | Pride
Project description:Apart from alterations in the RET/PTC-RAS-BRAF pathway, comparatively little is known about the genetics of papillary thyroid carcinoma (PTC). We show that numerous miRNAs are transcriptionally up-regulated in PTC tumors compared with unaffected thyroid tissue. A set of 5 miRNAs including the 3 most upregulated ones (miRs 221, 222, 146) distinguished unequivocally between PTC and normal thyroid. Additionally, miR-221 was upregulated in unaffected thyroid tissue in several PTC patients, presumably an early event in carcinogenesis. Tumors in which the upregulation (11-19 fold) of miRs 221, 222 and 146 was strongest showed dramatic loss of KIT transcript and Kit protein. In five of 10 such cases this was associated with germline single nucleotide changes in the two recognition sequences in KIT for these miRNAs. We conclude that upregulation of several miRs and down regulation of KIT are involved in PTC pathogenesis, and that sequence changes in genes targeted by miRNAs can contribute to their downregulation.
2005-02-28 | E-TABM-68 | biostudies-arrayexpress
Project description:These studies profiled the expression of mRNAs and microRNAs (miRs) in lung neutrophils in WT mice during S. pneumoniae pneumonia and performed in depth in silico analyses. Lung neutrophils were isolated 24 hours after intratracheal instillation of PBS or S. pneumoniae, and mRNAs and miRs differentially expressed (DE) between S. pneumoniae- and PBS-treated samples were identified using microarrays.
2017-11-01 | GSE97921 | GEO