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MicroRNAs circulate in the hemolymph of Drosophila and accumulate relative to tissue microRNAs in an age-dependent manner [mRNA]

ABSTRACT: In mammals, extracellular miRNAs circulate in biofluids as stable entities that are secreted by normal and diseased tissues, and can enter cells and regulate gene expression. Drosophila melanogaster is a proven system for the study human diseases. They have an open circulatory system in which hemolymph (HL) circulates in direct contact with all internal organs, in a manner analogous to vertebrate blood plasma. Here we show using deep sequencing that Drosophila HL contains RNase resistant, circulating miRNAs (HL-miRNAs). Limited subsets of body tissue miRNAs (BT-miRNAs) accumulated in HL, suggesting they may be specifically released from cells or particularly stable in HL. Alternatively, they might arise from specific cells such as hemocytes, in intimate contact with HL. Young and old flies accumulated unique populations HL-miRNAs, suggesting their accumulation is responsive to the physiological status of the fly. These HL-miRNAs may function in flies similarly to the miRNAs circulating in mammalian biofluids. The discovery of these HL-miRNAs will provide a new venue for health and disease-related research in Drosophila.

ORGANISM(S): Drosophila melanogaster

PROVIDER: GSE77037 | GEO | 2017/02/09

SECONDARY ACCESSION(S): PRJNA309308

REPOSITORIES: GEO

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MicroRNAs circulate in the hemolymph of Drosophila and accumulate relative to tissue microRNAs in an age-dependent manner [miRNA]

Project description:In mammals, extracellular miRNAs circulate in biofluids as stable entities that are secreted by normal and diseased tissues, and can enter cells and regulate gene expression. Drosophila melanogaster is a proven system for the study human diseases. They have an open circulatory system in which hemolymph (HL) circulates in direct contact with all internal organs, in a manner analogous to vertebrate blood plasma. Here we show using deep sequencing that Drosophila HL contains RNase resistant, circulating miRNAs (HL-miRNAs). Limited subsets of body tissue miRNAs (BT-miRNAs) accumulated in HL, suggesting they may be specifically released from cells or particularly stable in HL. Alternatively, they might arise from specific cells such as hemocytes, in intimate contact with HL. Young and old flies accumulated unique populations HL-miRNAs, suggesting their accumulation is responsive to the physiological status of the fly. These HL-miRNAs may function in flies similarly to the miRNAs circulating in mammalian biofluids. The discovery of these HL-miRNAs will provide a new venue for health and disease-related research in Drosophila.

2017-02-09 | GSE77038 | GEO

Identification of circulating miRNA involved in meat yield of Korean cattle

Project description:Cattle plays an important role in providing essential nutrients through meat production. Thus, we focused on epigenetic factors associated with meat yield. To investigating circulating miRNAs that are involved with meat yield and connect biofluids and longissimus dorsi (LD) muscle in Korean cattle, we performed analyses of the carcass characteristics, miRNA array, qPCR, and bioinformatics. Carcass characteristics relative to the yield grade (YG) showed that the yield index and rib eye area were the highest, whereas the backfat thickness was the lowest for YG A (equal to high yield grade) cattle among the three YGs. miRNA array sorted the circulating miRNAs that connect biofluids and LD muscle. miRNA qPCR showed that miR-15a (r = 0.84), miR-26b (r = 0.91), and miR-29c (r = 0.92) had positive relationships with biofluids and LD muscle. In YG A cattle, miR-26b was considered to be a circulating miRNA connecting biofluids and LD muscle because the target genes of miR-26b was more involved with myogenesis. Then, miR-26b targeted genes, DIAPH3 and YOD1 were downregulated in YG A cattle. Our results suggest that miR-15a, miR-26b, and miR-29c are upregulated in biofluids and LD muscle whereas, downregulation of DIAPH3 and YOD1 in the LD muscle of finishing cattle steers.

2016-03-01 | GSE73389 | GEO

An analysis of bovine serum via microRNA-sequencing and an investigation into its potential in identifying biomarkers for early Mycobacterium avium paratuberculosis infection

Project description:Mycobacterium avium subspecies paratuberculosis (MAP) is capable of causing a chronic enteritis known as Johne’s disease (JD) in ruminants, resulting in substantial economic loses. Sensitive and specific novel prognostic assays are required to help limit infection, and circulating microRNAs (miRNAs) have the potential to serve as biomarkers. Sequencing provides a thorough opportunity to characterise miRNAs but this technology is challenged by the low RNA concentrations in biofluids. The aim of this study was to determine whether small RNA-sequencing technology could be applied to bovine serum samples from an experimental JD infection model.

2015-06-01 | E-MTAB-3445 | biostudies-arrayexpress

Run or die in the evolution of de novo microRNAs

Project description:MicroRNAs (miRNAs) are a class of small, endogenous RNAs that regulate mRNA expressions post-transcriptionally. To study their expression, we collected and sequenced small RNA libraries in Drosophila species. To survey their regulation divergence, we dissected testes from miR-983 mutant and control flies in two sibling species and performed an RNA-seq analysis.

2018-06-14 | GSE110086 | GEO

Circadian regulation of a limited set of microRNAs in Drosophila

Project description:We used a microarray platform to survey the daily levels of 78 D. melanogaster miRNAs in adult heads of wildtype control flies and the arrhythmic clock mutant cyc01. At least 2 miRNAs were identified that showed robust daily abundance changes in control flies but not the cyc01 mutant. Keywords: microRNA, Circadian regulation yw and yw;cyc01 flies were maintained in standard media. For collections, approximately 50-100 young (2-5 day old) flies were placed in vials that were incubated at 25oC for four days in standard 12hr light-12hr dark cycles [LD; where zeitgeber time 0 (ZT0) is defined as lights-on]. Flies were collected by freezing in dry ice during the fourth LD cycle at the following times; ZT1, 7, 13 and 19. Subsequently low molecular RNAs were extracted for microarray analysis using a mirMAX microarray.

2010-05-27 | E-GEOD-10005 | biostudies-arrayexpress

Separation of circulating microRNAs using apheresis in patients with systemic lupus erythematosus

Project description:Examined the removal or reduction of circulating miRNAs with apheresis. The levels of expression of a large number of circulating miRNAs were measured in the plasma samples separated by the primary membranes from all 3 patients with systemic lupus erythematosus. This is the first report that circulating miRNAs in peripheral blood can be separated and possibly directly removed using membrane separation apheresis.

2016-04-11 | GSE76241 | GEO

Esophageal tissue and serum microRNAs changed in the progression of Barrett’s esophagus in mice

Project description:Circulating microRNAs (miRNAs) are promising biomarkers for the early detection of cancers. This assay aimed to address potential circulating miRNAs to monitor the progression from Barrett’s esophagus to esophageal adenocarcinoma (EAC).

2017-12-06 | GSE100390 | GEO

Exclusive heat-not-burn cigarette smoking alters the profile of circulating microRNAs.

Project description:Background. Traditional combustion cigarette (TCC) smoking is an established risk factor for several types of cancer and cardiovascular diseases. Circulating microRNAs (miRNAs) represent key molecules mediating pathogenetic mechanisms, and potential biomarkers for personalized risk assessment. Several transcriptomics studies have showed that TCC smoking globally changes the profile of circulating miRNAs. The use of heat-not-burn cigarettes (HNBCs) as alternative smoking devices is rising exponentially worldwide, with still unknown long-term effects on health. Comprehensive data on the circulating miRNA profile in chronic HNBC smokers are still lacking. Purpose. We aimed at defining the profile of circulating miRNAs in serum samples of chronic exclusive HNBC smokers, and identifying potentially pathogenetic circulating miRNA signatures. Results. Differential expression analysis revealed 101 miRNAs significantly modulated between groups (adjusted p<0.05), with a prevalence of circulating miRNA downregulation in smokers (only 20 miRNAs were upregulated in both groups of smokers). Head-to-head comparison revealed that 65 miRNAs were exclusively modulated in TCC, 26 miRNAs were commonly modulated in both smoker groups, and 10 miRNAs were exclusively modulated in HNBC samples, all versus NS. KEGG pathway analysis performed on target genes of the commonly modulated miRNAs returned cancer-associated and cardiovascular disease pathways. The application of stringent abundance and fold-change criteria to this list nailed down our functional bioinformatic analyses to a network where miR-25-3p and miR-221-3p are main hubs for cardiovascular- and cancer- related molecular pathways, respectively. Conclusions. Our results define for the first time a global miRNA profile in the serum of exclusive chronic HNBC smokers. Despite the globally lower extent of the differences observed, our data suggest a significant detrimental impact of HNBCs on circulating miRNAs.

2023-06-13 | GSE233237 | GEO

Circadian regulation of a limited set of microRNAs in Drosophila

2007-12-29 | GSE10005 | GEO

New microRNAs in Drosophila

Project description:MicroRNAs (miRNA) are small, endogenous RNAs that regulate the expression of mRNAs posttranscriptionally. Evolutionarily new miRNAs, like new protein-coding genes, are dominantly expressed in reproductive organs. To dissect the evolutionary dynamics of new miRNAs in Drosophila spp, we sequenced small RNAs from two species of Drosophila, including four samples from reproductive organs and one sample from imaginal discs / CNS. miRNA expression profile shows vast majority of new miRNAs are specifically expressed in testes and/or ovaries, suggesting a role of sexual selection for new miRNA evolution.

2013-12-31 | GSE48017 | GEO

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