We compare the CD4+ T cell transcriptome between obese and normal-weight children with asthma to identify molecules/pathways differentially expressed in obese asthmatic CD4+ T cells Overall design: CD4+ T cell transcriptome generated using Directional RNA-Seq library preparatio; A=Normal-weight, B=obese
CDC42-related genes are upregulated in helper T cells from obese asthmatic children.
Sex, Age, Specimen part, Disease stage, Race, Subject
View SamplesGametes rely heavily on post-transcriptional control mechanisms to regulate their differentiation. In eggs, the storage and selective temporal activation of maternal mRNAs is essential for normal development. In the male, transcription ceases during spermiogenesis necessitating the post-transcriptional regulation of many paternal mRNAs required for spermatid differentiation and spermatozoan function. Messenger RNAs that are being actively translated form polysomes. whereas translationally inactive mRNAs are often sequestered in ribonucleoproteins (RNPs). Here we combine polysome display and microarray analyses of RNP and polysome fractions of testes from prepuberal and adult mice to characterize the translation state of individual mRNAs as spermatogenesis proceeds.. Consistent with published reports, many post-meiotic mRNAs known to be translationally delayed shift from the RNPs into the polysomes, confirming the validity of this approach. In addition, based upon the criterion of movement from RNPs to polysomes, we detect another 742 mouse testicular genes showing dramatic shifts between RNPs and polysomes. One sub-group of 35 genes including the known translationally delayed Pgk2, are initially transcribed and translationally repressed in meiotic spermatocytes, and translated post-meiotically. This high-through-put approach defines the changing translation patterns of a large number of genes as male germ cells differentiate and identifies a new group of post-transcriptionally regulated meiotic transcripts for future study.
Expression profiling reveals meiotic male germ cell mRNAs that are translationally up- and down-regulated.
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View SamplesInsight into mechanisms controlling gene expression in the spermatogonial stem cell (SSC) will improve our understanding of the processes regulating spermatogenesis and aid in treating problems associated with male infertility.
Spermatogonial stem cell self-renewal requires ETV5-mediated downstream activation of Brachyury in mice.
Specimen part, Treatment
View SamplesExpression of GDNF-regulated genes was studied in cultures of self-renewing rat spermatogonial stem cells established from 8-10 day old rat pups maintained in a defined serum free medium. GDNF is the primary regulator of spermatogonial stem cell self renewal in the rat.
Identification of glial cell line-derived neurotrophic factor-regulated genes important for spermatogonial stem cell self-renewal in the rat.
Specimen part
View Samplesmicrarray profiling on Arabidopsis thaliana col-0, cry1 and hfr1 in response to dark and 1 h blue light treatment
HFR1 is crucial for transcriptome regulation in the cryptochrome 1-mediated early response to blue light in Arabidopsis thaliana.
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View SamplesSelf-renewal and differentiation of spermatogonial stem cells (SSCs) provides the foundation for testis homeostasis, yet mechanisms that control their functions in mammals are poorly defined. We used microarray transcript profiling to identify specific genes whose expression are augmented in the SSC-enriched Thy1+ germ cell fraction of mouse pup testes. Comparisons of gene expression in the Thy1+ germ cell fraction to the Thy1-depeleted testis cell population identified 202 genes that are expressed 10-fold or higher in Thy1+ cells. This database provided a mining tool to investigate specific characteristics of SSCs and identify novel mechanisms that potentially influence their functions.
Colony stimulating factor 1 is an extrinsic stimulator of mouse spermatogonial stem cell self-renewal.
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View SamplesBecause refractive development is governed largely by the retina, we analyzed the retinal transcriptome in chicks wearing a spectacle lens, a well-established means to induce refractive errors, to identify gene expression alterations and to develop novel mechanistic hypotheses about refractive development.
Image defocus and altered retinal gene expression in chick: clues to the pathogenesis of ametropia.
Specimen part
View SamplesOne-day old white Leghorn chicks were housed in brooders with a 12 hr light:dark cycle, using General Electric chroma 50 fluorescent lighting with irradiance of approximately 50W/cm2 at chick eye level. They received Purina Chick Chow food and water ad libitum. At one week of age and at the onset of the light phase, the chicks were anesthetized with inhalation ether, and a unilateral translucent white plastic goggle was glued to the periorbital feathers to induce ipsilateral form-deprivation myopia, alternating between the left or right eye.
Form-deprivation myopia in chick induces limited changes in retinal gene expression.
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View SamplesThe transcription factors Pax3 and Zic1 are among the earliest genes activated at the neural plate border. Pax3 and Zic1 in combination promote neural crest fate, while Zic1 alone regulate cranial placode progenitor formation. We used microarrays to identify the global repertoire of genes activated by these facors individually or in combination to gain insights into the molecular mechanisms underlying cell fate decision at the neural plate border.
Identification of Pax3 and Zic1 targets in the developing neural crest.
Specimen part, Treatment
View SamplesUsing the ED-L2 promoter of Epstein-Barr virus to drive Cre, we obtained tissue specific ablation of Klf4 in the squamous epithelia of the esophagus.
Esophageal squamous cell dysplasia and delayed differentiation with deletion of krüppel-like factor 4 in murine esophagus.
Sex, Age, Specimen part
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