Project description:To determine miRNA profiles in rat adrenals from animals treated with vehicle, ACTH, 17α-ethinyl estradiol (17α-E2) or dexamethasone (DEX). miRNA expression profiling was performed using Affymetrix® GeneChip® miRNA 2.0 Arrays. Together with qRT-PCR, several adrenal miRNAs have been identified, whose expression is subject to regulation by one or more than one hormone.
Project description:Purpose: The study aimed to determine the expression profiles of retinal miRNA from adult Sprague Dawley (SD) rat and C57BL/6 mice. Methods: The profile of retinal miRNA transcriptom from rat (8 weeks old) and mice (8 weeks old) were generated by deep sequencing, in triplicate, using Illumina Hiseq-2500 RNA-seq platform. The sequence reads from all samples were analysed for overall quality, screened for the presence of any contaminants and trimmed accordingly. The cleaned sequence reads were then processed through the quantification modules miRDEEP2 ver2.0.0.7 pipeline for known miRNA expression profiling. Rat or mice miRNAs from miRBASE release21 were used for mapping and quantification. Results: We identified a total of 643 and 1294 miRNAs, that were expressed in the retina of rat and mouse, respectively. Moreover, with a readcount cutoff of >0.5, 475 and 614 miRNAs were identified in the retina of rat and mouse, respectively. Conclusion: Our study represents the first detailed analysis of retinal miRNA profile in adult rat and mouse. Our results also suggested that both species have a similar expression patterns of retinal miRNAs.
Project description:Diet induced obesity in rat was associated with myocardial dysfunction, hypertension and fibrosis. This study aimed to explore microRNA expression profiles in diet obesity-induced rat myocardium. Wistar rats were feed normal chow or high-fat diet for 20 weeks. After that, cardiac function was evaluated by echocardiography. Left ventricular myocardium was harvest to assess the extent of hypertension and fibrosis, meanwile, the left ventricular microRNA expression was analyzed using Agilent Rat miRNA microarray. Significant cardiac dysfunction, hypertension and fibrosis were found in diet-induced obesity rats as compared with normal diet rats. rno-miR-141-3p and rno-miR-144-3p were also significantly increased in myocardium of diet-induced obesity rat. These findings suggest that specific miRNA differences may contribute to the alteration in cardiac function, hypertension and fibrosis which responses to diet-induced obesity.
Project description:To determine miRNA profiles in rat adrenals from animals treated with vehicle, ACTH, 17M-NM-1-ethinyl estradiol (17M-NM-1-E2) or dexamethasone (DEX). miRNA expression profiling was performed using AffymetrixM-BM-. GeneChipM-BM-. miRNA 2.0 Arrays. Together with qRT-PCR, several adrenal miRNAs have been identified, whose expression is subject to regulation by one or more than one hormone. RNA was extracted from four group rat adrenal gland and miRNA profiles were established using microarray using AffymetrixM-BM-. GeneChipM-BM-. miRNA 2.0 Arrays and confirmed with qRT-PCR. The microarray data were analyzed using PartekM-BM-. Genome Suite software, version 6.3 CopyrightM-BM-) 2008 (Partek Inc., St. Louis, MO, USA) to comprehensively evaluate the differential expression level of the various samples.
Project description:This study tested the hypothesis that miRNA expression profiles change in the muscular type rat saphenous artery during early postnatal development. To explore this, we performed miRNA microarray analysis on muscular type saphenous arteries of young (10-12 days) and adult (2-3 months) rats.
Project description:Purpose: The study aimed to determine the transcriptome profile of retinal miRNA in a Sprague Dawley (SD) rat model of oxygen-induced retinopathy Methods: The newborn rats in OIR group were subjected to daily cycles of 80% oxygen for 21 hours and room air for 3 hours in a customised chamber for 14 days (postnatal day 14, P14), then return to room air for 15 days (postnatal day 29, P29). The newborn rats in sham group were housed in room air for 14 days. Retinal miRNA expression profiles of OIR or sham rats at P14 or OIR rats at P29 were generated by deep sequencing, in triplicate, using Illumina Hiseq-2500 RNA-seq platform. Briefly, the sequence reads from all samples were analysed for overall quality, screened for the presence of any contaminants and trimmed accordingly. The cleaned sequence reads were then processed through the quantification modules miRDEEP2 ver2.0.0.7 pipeline for known miRNA expression profiling. Rat miRNAs from miRBASE release21 were used for mapping and quantification. Differential miRNA expression analysis was undertaken using voom bioconductor package (https://www.bioconductor.org/packages/release/bioc/vignettes/limma/inst/doc/usersguide.pdf). Results: A total of 465 miRNAs were identified in the rat retina. The miRNAs with significantly altered levels (P<0.05) were identified in OIR rats at P14 compared with the sham controls or OIR rats at P29. Among those altered miRNAs, seven miRNAs were down-regulated in OIR rats at P14 with Log2 (Fold Change) < -1 fold, and no miRNAs were up-regulated. Additionally, the expression of these down-regulated miRNAs in OIR rats at P14 was restored at P29 after they were exposed to room air. Conclusion: Our study represents the first detailed analysis of retinal miRNA expression profile in rat model of OIR by miRNA-NGS technology.
Project description:The rat has been used extensively as a model system for biological studies. However, its microRNA (miRNA) transcriptome has not been well established. Here, we constructed a comprehensive rat miRNA BodyMap based on miRNA-seq of 320 samples from 11 organs of both sexes of juvenile, adolescent, adult, and aged Fischer 344 rats. We quantified the expression profiles of 993 rat miRNAs, including 268 novel miRNA candidates. A large number of miRNAs showed organ-specific, age-dependent, or sex-specific expression patterns. Particularly, brain exhibited the strongest organ-enriched expression patterns, and testis showed the most strikingly age-dependent expression patterns. Interestingly, the expression levels of two clusters of miRNAs were highly correlated with those of mRNAs and were highly age dependent. The miRNA dataset along with previously reported mRNA data from the same set of samples represents a unique resource to improve understanding of rat transcriptome and subsequently better utilize rats for biomarker discovery.