PeFleSpea1
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB74330 | ENA |
REPOSITORIES: ENA
Similar Datasets
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Project description:Puccinia graminis f. sp. tritici is the cause of wheat stem rust. A microarray was designed from genes predicted from the P. graminis f. sp. tritici genome assembly, and gene expression measured for four conditions which include wheat or barley infecting growth stages initiated by urediniospores. mRNA was prepared from fresh urediniospores, uredinospores germinated for 24 hr, wheat seedlings infected with urediniospores for 8 days, and barley seedlings infected with urediniospores for 8 days. The asexual uredinial infection cycle on wheat produces additional urediniospores, which can start new cycles of wheat infection and are readily spread by aerial transport. This expression data is further described in Duplessis et al, Obligate Biotrophy Features Unraveled by the Genomic Analysis of the Rust Fungi, Melampsora larici-populina and Puccinia graminis f. sp. tritici
2010-12-31 | GSE25020 | GEO
Project description:Puccinia graminis f. sp. tritici is the cause of wheat stem rust. A microarray was designed from genes predicted from the P. graminis f. sp. tritici genome assembly, and gene expression measured for four conditions which include wheat or barley infecting growth stages initiated by urediniospores. mRNA was prepared from fresh urediniospores, uredinospores germinated for 24 hr, wheat seedlings infected with urediniospores for 8 days, and barley seedlings infected with urediniospores for 8 days. The asexual uredinial infection cycle on wheat produces additional urediniospores, which can start new cycles of wheat infection and are readily spread by aerial transport. This expression data is further described in Duplessis et al, Obligate Biotrophy Features Unraveled by the Genomic Analysis of the Rust Fungi, Melampsora larici-populina and Puccinia graminis f. sp. tritici A total of 12 samples were analyzed, including three biological replicates of the four conditions.
2010-12-31 | E-GEOD-25020 | biostudies-arrayexpress
Project description:Human immunodeficiency virus (HIV) transcription requires assembly of cellular transcription factors at the human immunodeficiency virus type 1 (HIV-1) promoter. The TFIIH general transcription factor facilitates transcription initiation by opening the DNA strands around the transcription start site and phosphorylating the C-terminal domain of RNA polymerase II (RNAPII) for activation. Spironolactone (SP), an FDA approved aldosterone antagonist, triggers the proteasomal degradation of the XPB subunit of TFIIH and concurrently suppresses acute HIV infection in vitro. Here, we investigated SP as a possible block-and-lock agent for a functional cure, aimed at the transcriptional silencing of the viral reservoir. The long-term activity of SP was investigated in primary and cell line models of HIV-1 latency and reactivation. We show that SP rapidly inhibits HIV-1 transcription by reducing RNAPII recruitment to the HIV-1 genome. Short hairpin RNA (shRNA) knockdown of XPB confirmed XPB loss as the mechanism of action of HIV inhibition. Unfortunately, long-term pretreatment with SP does not result in long-term epigenetic suppression of HIV upon SP treatment interruption, since the virus rapidly rebounds when XPB reemerges; however, SP alone without antiretroviral therapy (ART) maintains transcriptional silencing of HIV. Importantly, SP inhibits HIV reactivation from latency in both cell line models and resting CD4+ T cells isolated from aviremic individuals living with HIV upon cell stimulation with latency-reversing agents. Furthermore, long-term treatment with concentrations of SP that potently degrade XPB does not lead to global dysregulation of cellular mRNA expression. Overall, these results suggest that XPB plays a key role in HIV transcriptional regulation, and XPB degradation by SP strengthens the potential of HIV transcriptional inhibitors in block-and-lock cure approaches.
2021-03-02 | GSE167997 | GEO