Transcription profiling of Arabidopsis control vs. 35S:AtRALF1-1
Ontology highlight
ABSTRACT: This series (two repeats) compares the transcriptional changes caused by the overexpression of the AtRALF1-1 cDNA. AtRALF1-1 is one of the nine Arabidopsis isoforms of the polypeptide hormone RALF (PNAS 98, 12843).
Project description:This series (two repeats) compares the transcriptional changes caused by the overexpression of the AtRALF1-1 cDNA. AtRALF1-1 is one of the nine Arabidopsis isoforms of the polypeptide hormone RALF (PNAS 98, 12843). Keywords: other
Project description:Expression profile of HeLa and C33A cervical cancer cells line treated with PNAs-A15 for 6 hours. PNAs-A15 is peptide nucleic acid of A-repeats length 15 bp that can suppress up-regulated A-repeats containing genes in cervical cancer cells line.
Project description:Expression profile of parental wild type non-small cell lung cancer, NCI-H460, and cancer stem cell-rich (CSC-rich) populations treated with PNAs-A15 for 6 h. Results provide the information that PNAs-A15, a peptide nucleic acid of A-repeats length 15 bp, suppressed up-regulated A-repeats containing genes in both parental wild type and CSC-rich cells.
Project description:Expression profile of HeLa and C33A cervical cancer cells line treated with PNAs-A15 for 6 hours. PNAs-A15 is peptide nucleic acid of A-repeats length 15 bp that can suppress up-regulated A-repeats containing genes in cervical cancer cells line. The cervical cancer cell line HeLa and C33A was maintained at 37C in 5% CO2 under sterile conditions in Dulbecco's modified Eagle medium, supplemented with 10% fetal bovine serum. Cells were treated with PNAs-A15 in 6-well microplates for 6 h. Total RNA was isolated and hybridized on the HumanHT-12 v4 Expression BeadChip. The RNA expressions were evaluated and compared with 2 repeats of controlled experiments.
Project description:Thyroid hormone receptors (TRs) are hormone-regulated transcription factors that control multiple aspects of physiology and development. TRs are expressed in vertebrates as a series of distinct isoforms that exert distinct biological roles. We wished to determine if the two most widely expressed isoforms, TRa1 and TRb1, exert their different biological effects by regulating different sets of target genes. Using stably transformed HepG2 cells and a microarray analysis, we were able to demonstrate that TRa1 and TRb1 regulate a largely overlapping repertoire of target genes in response to T3 hormone. However, these two isoforms display very different transcriptional properties on each individual target gene, ranging from a much greater T3-mediated regulation by TRa1 than by TRb1, to near equal regulation by both isoforms. We also identified TRa1 and TRb1 target genes that were regulated by these receptors in a hormone-independent fashion. We suggest that it is this gene-specific, isoform-specific amplitude of transcriptional regulation that is the likely basis for the appearance and maintenance of TRa1 and TRb1 over evolutionary time. In essence, TRa1 and TRb1 adjust the magnitude of the transcriptional response at different target genes to different levels; by altering the ratio of these isoforms in different tissues or at different developmental times, the intensity of T3 response can be individually tailored to different physiological and developmental requirements. TRa1, TRb1, or empty plasmid control stably transfected HepG2 cells were treated with 100 nM T3 or with ethanol carrier alone for 6h. Three independent biological repeats were analyzed for each of the three transformant pools (empty plasmid control, TRa1, and TRb1).
Project description:Expression profile of parental wild type non-small cell lung cancer, NCI-H460, and cancer stem cell-rich (CSC-rich) populations treated with PNAs-A15 for 6 h. Results provide the information that PNAs-A15, a peptide nucleic acid of A-repeats length 15 bp, suppressed up-regulated A-repeats containing genes in both parental wild type and CSC-rich cells. In this study, we isolate cancer stem cell-rich (CSC-rich) population from a non-small cell lung cancer (NSCLC) cell line, NCI-H460, by selectively propagating the cells in a spheroid culture condition. The parental wild type H460 and CSC-rich cells were maintained at 37°C in 5% CO2 under sterile conditions in Roswell Park Memorial Institute (RPMI) 1640 medium. Cells were treated with PNAs-A15 in 6-well microplates for 6 h. Total RNA was isolated and hybridized on the HumanHT-12 v4 Expression BeadChip. The RNA expressions were evaluated.
Project description:Antisense oligomers (ASOs) such as peptide nucleic acids (PNAs), designed to inhibit the translation of essential bacterial genes, have emerged as attractive sequence- and species-specific programmable RNA antibiotics. Yet, potential drawbacks include unwanted side effects caused by their binding to transcripts other than the intended target. To facilitate the design of PNAs with minimal off-target effects, we developed MASON (Make AntiSense Oligomers Now), a webserver for the design of PNAs that target bacterial mRNAs. MASON generates PNA sequences complementary to the translational start site of a bacterial gene of interest and reports critical sequence attributes and potential off-target sites. We based MASON’s off-target predictions on experiments in which we treated Salmonella enterica serovar Typhimurium with a series of 10mer PNAs derived from a PNA targeting the essential gene acpP but carrying two serial mismatches. Growth inhibition and RNA-sequencing (RNA-seq) data revealed that PNAs with terminal mismatches are still able to target acpP, suggesting wider off-target effects than anticipated. Comparison of these results to an RNA-seq dataset from uropathogenic Escherichia coli (UPEC) treated with eleven different PNAs confirmed our findings are not unique to Salmonella. We believe that MASON’s off-target assessment will improve the design of specific PNAs and other ASOs.
Project description:Glucose-dependent insulinotropic polypeptide (GIP) is an incretin hormone secreted by enteroendocrine K-cells in the proximal small intestine. This study aimed to explore the function of human K-cells at the molecular and cellular level.
Project description:To determine changes in gene expression in primary fibroblasts undergoing replicative senescence, a direct comparison between early passage proliferating cells and senescent cells was performed. Frozen stocks of the primary fibroblasts (HMF3) from which the lines HMF3A and HMF3Dwt were derived (O'Hare, PNAS:98, 2001) were serially passaged twice through to senescence to yield 2 independent sets of RNA. A third set of RNA was from a different female donor (F1068). The three different sets of RNA were put on 4 arrays each. Data is also provided for F1068 fibroblasts at late passage. Keywords = fibroblast Keywords = senescence Keywords = breast Keywords: ordered
Project description:total RNA from mouse (male c57BL/6) spleen labeled with Cy3 vs total RNA from mouse (male c57BL/6) B cells treated with Growth Hormone Release Hormone (GHRH) labeled with Cy5- time course with repeats Keywords: ordered