Project description:A small RNA library of stomach antrum tissue was sequenced using high-throughput SOLiD sequencing technology. The study aims to provide complementary information of the role of miRNAs in molecular regulation process in the healthy human stomach, in order to establish a reference for future comparisons of altered miRNA expression due to the gastric tract diseases.
Project description:Purpose: The purpose of this study was to identify the miRNome of keratinocytes in psoriasis Method: We performed next-generation sequencing for small RNAs from the RNA samples obtained from keratinocytes from psoriasis lesional, non-lesional and healthy skin. Next, we removed adapters and the low quality tags from the sequencing data and clean reads were mapped and aligned to known miRNAs sequences (miRBase 21). Novel miRNA transcripts were predicted based on the length (22-25 nucleotide) and secondary structure (precursor analysis) using MIREAP and mapped to the human genome. Data were normalized (transcripts per million, TPM) and analysed using Bioconductor-EdgeR. Group comparisons (lesional vs. healthy, lesional vs. non lesional and non-lesional vs. healthy) were performed. MiRNAs with <10% FDR, fold change >1.4 (1 TPM at least in one of the groups and expressed in half of the samples in any group) were considered statistically significant. Results: Robust expression of 411 known and 30 novel miRNAs (TPM > 1 in >50% of the samples in at least one of the groups) was detected in our samples. Using EdgeR we identified 104 miRNAs with significantly altered level (fold change > 1.4, FDR < 0.1) between healthy and psoriatic keratinocytes (P vs H). While, pair-wise comparison of miRNA expression in keratinocytes from non-lesional and lesional psoriasis skin (P vs. N) identified 87 deregulated miRNAs. Comparison of the miRNome of keratinocytes from non-lesional skin of psoriasis patients to healthy keratinocytes (N vs. H) identified 7 differentially expressed miRNAs. Conclusion: Here, for the first time we show the keratinocyte miRNome in psoriasis which may serve as the basis for future functional studies of miRNAs deregulated in keratinocytes in psoriasis.
Project description:Cows were fed a lactation diet at ad libitum intake (n = 6). At 27±3 days in milk, cows were injected with 50 µg of LPS E. coli in one healthy rear mammary quarter. Milk samples were collected just before LPS challenge (LPS-) and 6.5 h after LPS challenge (LPS+) from the same cows. Microarray analysis was performed using customized 8x60K ruminant miRNA microarrays to compare LPS- to LPS+ miRNome. MiRNome comparison between LPS- and LPS+ identified 37 differentially abundant miRNAs (q-value ≤ 0.05)
Project description:In This work we analyzed the mirnome in plasma and corresponding extracellular vesicles (EVs) from 12 patients affected by retinoblastoma (Rb) a childhood intraocular malignant tumor, as well as from 12 healthy aged matched controls. Using hierarchical clustering with the detection score microarrays provide for each miRNA and we identified a plasma signature of 19 miRNAs in all Rb cases that were able to discriminate both cases from controls.
Project description:The molecular events promoting the initiation of gastric cancer (GC), the third most lethal cancer worldwide, are ill-defined. Here, we demonstrate that upregulation of miR-200 family members is associated with tumor initiation in the gp130F/F mouse model of early GC. The onset of gastric inflammation-associated adenomatous hyperplasia in gp130F/F mice occurs at ~6 weeks of age, with established intestinal-type tumors (3 months of age) progressively growing until a maximum size is reached at 6 months of age, with some evidence of carcinoma in situ. Since this phenotype histologically mimics early stage human GC, we therefore utilized gp130F/F mice as a model to identify miRNAs involved in the initiating molecular events leading to early stage GC. For this purpose, we performed miRNA microarrays on mouse gastric antrum tissue from gp130F/F and sex-matched littermate wild-type (gp130+/+) control mice aged 4 weeks; this age was chosen since antrum tissue from 4 week old (wo) gp130F/F mice is devoid of any histological signs of inflammation or hyperplasia, and is thus comparable to wild-type gastric antrum tissue
Project description:Purpose: To reveal the consistency and difference of gastric antrum epithelial cells among species and provides insights into the selection of model organisms in different research directions in the future. Methods:In this study, we collected antrum epithelial tissues from human, pig, rat and mouse for scRNA-seq and conducted cross species analysis. Results: In pig antral epithelium, we identify a novel cell cluster. We also discovered that the porcine antral epithelium owns stronger immune function than the other species. Further analysis reveals this may be due to the insufficient function of porcine immune cells. Conclusions:Our results replenish the information of multiple species of gastric antral epithelium at the single cell level, providing data resources for understanding the basic situation of gastric antrum epithelial cells.
Project description:This study is the first to report on the miRNome of healing gingiva and to provide an integrative analysis of mRNA/miRNA expression during human oral wound healing; the results offer novel insights into the participating molecular mechanisms and suggest that miR-124-3p and PXDN could be potential wound healing therapeutic targets.