To explore the mechanism of HCC metastasis.
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Sex, Age, Specimen part, Cell line
View SamplesTransgenerational inheritance of an environmentally-induced trait requires that the induced phenotype manifest in generations beyond those that were exposed as germ cells. Here we demonstrate that paternal obesity in mice confers a latent metabolic phenotype not only in F1 sons, but also in F2 grandsons who were never exposed to obesity. F1 and F2 male progeny of obese sires exhibit nearly identical metabolic phenotypes that can be explained in part by stable alterations in hepatic miR-122, a key regulator of fatty-acid metabolism. Both the physiological and molecular alterations induced by paternal obesity are inherited into F2 entirely through the male line, but become attenuated by F3. Our findings demonstrate true transgenerational inheritance of an acquired trait in mammals. The association between the acquired phenotype and levels of several abundant small noncoding RNAs in spermatozoa implicates small RNAs in the mechanism of inheritance.
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View SamplesIn mice, zygotic activation mainly occurs on a wide variety of genes mainly at the 2-cell stage. Long noncoding RNAs (lncRNAs) are increasingly being recognized as molecules that modulate gene expression. In this study, we performed the directional RNA-seq of MII oocytes and 2-cell embryos to identify the long noncoding RNAs activated during ZGA.
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View SamplesTo gain the transcriptome alteration caused by knockdown of PHF8 and USP7 in MCF-7 cells
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View SamplesMaize exhibits levels of structural variation (SV) of non-repeat sequences that are unprecedented among higher eukaryotes. This SV includes hundreds of copy number variants (CNVs) and thousands of presence/absence variants (PAVs). Many of the PAVs contain intact, expressed, single-copy genes that are present in one haplotype but absent from another. The goal of this project is to test the hypothesis that differences in gene copy number (both gains and losses) contribute to the extraordinary phenotypic diversity and plasticity of maize. Maize is a good model for these studies because it exhibits a rapid decay of linkage disequilibrium (LD) and because a draft genome sequence of the B73 inbred and mapping populations are available. As a first step, the "Zeanome", a near-complete set of genes present in B73, other maize lines and the wild ancestor of maize (teosinte), is being defined using transcriptomic data.
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View SamplesNo description.
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Cell line
View SamplesRNA-seq transcriptome profiles of genetically fate-mapped serotonin neurons, manually sorted from multiple anatomic domains, at both population and single cell resolution.
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Sex, Specimen part, Cell line
View SamplesHeterosis which is the improved vigor of F1-hybrids compared to their parents is widely exploited in maize (Zea mays L.) breeding to produce elite hybrids of superior yield. The transcriptomes of the maize inbred lines B73 and Mo17 and their reciprocal hybrid offspring were surveyed in the meristematic zone, the elongation zone, cortex and stele tissues of primary roots, prior to the developmental manifestation of heterosis. Single parent expression (SPE) is consistent with the dominance model for heterosis in that it denotes genes that are expressed in only one parent but in both reciprocal hybrids. In primary root tissues, between 1,027 (elongation zone) and 1,206 (stele) SPE patterns were observed. As a consequence, hybrids displayed in each tissue >400 active genes more than either parent. Analysis of tissue-specific SPE dynamics revealed that 1,233 of 2,233 SPE genes displayed SPE in all tissues in which they were expressed while 1,000 SPE genes displayed in at least one tissue a non-SPE pattern. In addition, 64% (17,351/ 27,164) of all expressed genes were assigned to the two subgenomes which are the result of an ancient genome duplication. By contrast, only between 18 and 25% of the SPE genes were assigned to a subgenome suggesting that a disproportionate number of SPE genes are evolutionary young and emerged after genome duplication. We hypothesize that this phenomenon is associated with human selection of favorable maize genotypes which might primarily affect younger genes rather than genes whose functions have been conserved for millions of years.
Nonsyntenic genes drive highly dynamic complementation of gene expression in maize hybrids.
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View SamplesRNA-Seq of reciprocally crossed Black6 x CAST hybrid mouse tissues.
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Sex, Cell line
View SamplesThe genomic distribution of trait-associated SNPs (TASs) discovered in genome-wide association studies (GWAS) can provide insight into the genetic architecture of complex traits and the design of future studies. Here we report on a maize GWAS that identified TASs underlying five quantitative traits measured across a large panel of samples and examine the characteristics of these TASs. A set of SNPs obtained via RNA sequencing (RNA-seq), most of which are located within annotated genes (~87%) were complemented with additional SNPs from the maize HapMap Project that contains approximately equal proportions of intragenic and intergenic SNPs. TASs were identified via a genome scan while controlling for polygenic background effects. The diverse functions of TAS-containing candidate genes indicate that complex genetic networks shape these traits. The vast majority of the TAS-containing candidate genes have dynamic expression levels among developmental stages. Overall, TASs explain 44~54% of the total phenotypic variation for these traits, with equal contributions from intra- and inter-genic TASs. Association of ligueless2 with upper leaf angle was implicated by two intragenic TASs; rough sheath1 was associated with leaf width by an upstream intergenic TAS; and Zea agamous5 was associated with days to silking by both intra- and inter-genic TASs. A large proportion (82%) of these TASs comes from noncoding regions, similar to findings from human diseases and traits. However, TASs were enriched in both intergenic (53%) and promoter 5kb (24%) regions, but under-represented in a set of nonsynonymous SNPs.
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