Project description:PURPOSE: To provide a detailed gene expression profile of the normal postnatal mouse cornea. METHODS: Serial analysis of gene expression (SAGE) was performed on postnatal day (PN)9 and adult mouse (6 week) total corneas. The expression of selected genes was analyzed by in situ hybridization. RESULTS: A total of 64,272 PN9 and 62,206 adult tags were sequenced. Mouse corneal transcriptomes are composed of at least 19,544 and 18,509 unique mRNAs, respectively. One third of the unique tags were expressed at both stages, whereas a third was identified exclusively in PN9 or adult corneas. Three hundred thirty-four PN9 and 339 adult tags were enriched more than fivefold over other published nonocular libraries. Abundant transcripts were associated with metabolic functions, redox activities, and barrier integrity. Three members of the Ly-6/uPAR family whose functions are unknown in the cornea constitute more than 1% of the total mRNA. Aquaporin 5, epithelial membrane protein and glutathione-S-transferase (GST) omega-1, and GST alpha-4 mRNAs were preferentially expressed in distinct corneal epithelial layers, providing new markers for stratification. More than 200 tags were differentially expressed, of which 25 mediate transcription. CONCLUSIONS: In addition to providing a detailed profile of expressed genes in the PN9 and mature mouse cornea, the present SAGE data demonstrate dynamic changes in gene expression after eye opening and provide new probes for exploring corneal epithelial cell stratification, development, and function and for exploring the intricate relationship between programmed and environmentally induced gene expression in the cornea. Keywords: other
Project description:We collected whole genome testis expression data from hybrid zone mice. We integrated GWAS mapping of testis expression traits and low testis weight to gain insight into the genetic basis of hybrid male sterility. Gene expression was measured in whole testis from males aged 62-86 days. Samples include 190 first generation lab-bred male offspring of wild-caught mice from the Mus musculus musculus - M. m. domesticus hybrid zone.
Project description:Introgressed variants from other species can be an important source of genetic variation because they may arise rapidly, can include multiple mutations on a single haplotype, and have often been pretested by selection in the species of origin. Although introgressed alleles are generally deleterious, several studies have reported introgression as the source of adaptive alleles-including the rodenticide-resistant variant of Vkorc1 that introgressed from Mus spretus into European populations of Mus musculus domesticus. Here, we conducted bidirectional genome scans to characterize introgressed regions into one wild population of M. spretus from Spain and three wild populations of M. m. domesticus from France, Germany, and Iran. Despite the fact that these species show considerable intrinsic postzygotic reproductive isolation, introgression was observed in all individuals, including in the M. musculus reference genome (GRCm38). Mus spretus individuals had a greater proportion of introgression compared with M. m. domesticus, and within M. m. domesticus, the proportion of introgression decreased with geographic distance from the area of sympatry. Introgression was observed on all autosomes for both species, but not on the X-chromosome in M. m. domesticus, consistent with known X-linked hybrid sterility and inviability genes that have been mapped to the M. spretus X-chromosome. Tract lengths were generally short with a few outliers of up to 2.7 Mb. Interestingly, the longest introgressed tracts were in olfactory receptor regions, and introgressed tracts were significantly enriched for olfactory receptor genes in both species, suggesting that introgression may be a source of functional novelty even between species with high barriers to gene flow.
Project description:We collected whole genome testis expression data from hybrid zone mice. We integrated GWAS mapping of testis expression traits and low testis weight to gain insight into the genetic basis of hybrid male sterility.
Project description:Purpose:The goals of this study are to obtain NGS-derived honey bee brain transcriptome profiling (RNA-seq) after dinotefuran treatment in honey bee Methods:Through deep sequencing in triplicate, using Illumina Hiseq2500,a comprehensive analysis of lncRNAs and mRNAs was performed following persistent exposure to 0.01 mg/L dinotefuran for 1, 5, and 10 d. Results: In total, 312 lncRNAs and 1341 mRNAs, 347 lncRNAs and 1458 mRNAs, 345 lncRNAs and 1155 mRNAs were found to be differentially expressed (DE) on days 1, 5 and 10 respectively. Conlusions:This study characterized the expression profile of lncRNAs upon exposure to neonicotinoid insecticides in young adult honey bees.
Project description:Spinal cord injury (SCI) is a severely disastrous event that occurs in the central nervous system (CNS) that is associated with high disability and mortality rates.To further explore the expression of mRNAs and lncRNAs and the potential roles of differentially expressed mRNAs and lncRNAs after SCI, we examined the expression of mRNAs and lncRNAs in a rat model at 2 hours, 2 days and 7 days after SCI and identified the differentially expressed lncRNAs (DE lncRNAs) and differentially expressed mRNAs (DE mRNAs) using microarray analysis. A total of 992 mRNAs were differentially expressed at 2 hours after SCI, among which 730 mRNAs were up-regulated and 262 mRNAs were down-regulated. A total of 4308 mRNAs were differentially expressed at 2 days after SCI, including 2229 mRNA with up-regulated expression and 2079 mRNAs with down-regulated expression. A total of 4113 mRNAs were differentially expressed at 7 days after SCI, including 2339 up-regulated and 1774 down-regulated mRNAs. After SCI, 772 lncRNAs were differentially expressed in the 2-hour group (528 were up-regulated, 244 were downregulated) , 3193 lncRNAs were differentially expressed in the 2-day group (1332 were up-regulated, 1861 were downregulated) ,3093 lncRNAs were differentially expressed in the 7-day group (1290 were up-regulated, 1803 were downregulated) .The current study on provides novel insights into how lncRNAs and mRNAs regulate the pathogenesis of the immediate phase after SCI.