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Leptosphaeria maculans gene expression during in vitro growth after silencing of DIM5 or HP1, two genes involved in chromatin remodelling

ABSTRACT: The transcriptome of Leptosphaeria maculans was analysed in mycelium of the wild type isolate v23.1.3 or in transformants silenced for DIM5 or HP1, two genes encoding enzymes involved in chromatin remodelling. The array probes were designed from gene models from the L. maculans whole genome annotation. The aim of this study was to characterise the effect of chromatin remodelling on gene expression during in vitro growth. We performed 9 hybridizations (NimbleGen) with samples derived from mycelium of a wild type isolate, v23.1.3, of a transformant silenced for HP1 and for a transformant silenced for DIM5. Three replicates each. All samples were labeled with Cy3.

ORGANISM(S): Leptosphaeria maculans

SUBMITTER: Isabelle Fudal

PROVIDER: E-GEOD-50616 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Leptosphaeria maculans gene expression during in vitro growth after silencing of DIM5 or HP1, two genes involved in chromatin remodelling

Project description:The transcriptome of Leptosphaeria maculans was analysed in mycelium of the wild type isolate v23.1.3 or in transformants silenced for DIM5 or HP1, two genes encoding enzymes involved in chromatin remodelling. The array probes were designed from gene models from the L. maculans whole genome annotation. The aim of this study was to characterise the effect of chromatin remodelling on gene expression during in vitro growth.

2014-03-06 | GSE50616 | GEO

Leptosphaeria maculans gene expression during in vitro growth and primary oilseed rape leaf infection

Project description:The transcriptome of Leptosphaeria maculans was analyzed in mycelium and during oilseed rape (Brassica napus) leaf infection. The array probes were designed from gene models from the L. maculans whole genome annotation. One aim of this study was to verify the expression of the automatically annotated gene models in various conditions. Another goal was to monitor gene expression profiles during oilseed rape leaf infection and to highlight tissue-specific transcripts, e.g. in plant up-regulated transcripts, for further analyses. We performed 9 hybridizations (NimbleGen) with samples derived from mycelium and infected oilseed rape leaves. Samples from infected oilseed rape leaves were harvested 7 and 14 days post infection. Three replicates each. All samples were labeled with Cy3.

2011-02-09 | E-GEOD-27152 | biostudies-arrayexpress

Gene expression changes in Suillus luteus- Pinus sylvestris ectomycorrhizal roots compared to Suillus luteus free-living mycelium

Project description:Illumina HiSeq technology was used to generate mRNA profiles from Suillus luteus ectomycorrhizal roots compared to free-living mycelium . Mycorrhizal roots were harvested after 40 days, pooled and used for RNA extraction. Reads of 2X100bp were generated and aligned to Suillus luteus (http://genome.jgi-psf.org/Suilu1/Suilu1.home.html) using CLC Genomics Workbench 6. mRNA profiles from Suillus luteus ectomycorrhizal roots and free-living mycelium were generated by paired-end (2x100bp) Illumina HiSeq2000 sequencing. Two biological replicates were sequenced for mycorrhizal and mycelium samples.

2015-02-06 | E-GEOD-63926 | biostudies-arrayexpress

Analysis of the molecular dialogue between Botrytis cinerea and Vitis vinifera reveals a clear shift in defence mechanisms during berry ripening.

Project description:Full transcriptomes of the Botrytis cinerea wild-type strain B0510 inoculated on mature grapevine berries (Marselan cultivar) at 16h, 24h, 48h, and in vitro were compared to identify B. cinerea genes diffentially expressed during the infection stages. Grapevine berries were inoculated with Botrytis cinerea conidia and samples were taken at 16h, 24h and 48 hours post-inoculation. An additional control sample corresponding to mycelium growing on static liquid minimal medium was included in the experimental design in order to identify genes that would be differentially expressed between in vitro and in planta growth conditions. 3-4 replicates were performed. The 13 total-RNA samples were used for hybridization on NimbleGen 4plex gene expression arrays (20,885 gene models from Botrytis cinerea with three 60-mer probes per gene).

2015-08-10 | E-GEOD-65559 | biostudies-arrayexpress

Sepula lacrymans interacting with tree roots

Project description:This study characterizes the transcriptomic alterations of Serpula lacrymans in contact with tree roots compared to the transcriptome of free-living mycelium. We performed 6 hybridizations (NimbleGen) with samples derived from Picea sylvestris root tips inoculated with Serpula lacrymans (three biological replicates). These samples were compared to free-living mycelium from Serpula lacrymans (three biological replicates). All samples were labeled with Cy3.

2015-02-06 | E-GEOD-63929 | biostudies-arrayexpress

Matrisome remodelling during Intervertebral Disc development and ageing

Project description:Intervertebral disc (IVD) degeneration is often the cause of low back pain. Degeneration occurs with age and is accompanied by extracellular matrix (ECM) depletion, culminating in nucleus pulpous (NP) extrusion and IVD destruction. The changes that occur in the disc with age have been under investigation. However, a thorough study of ECM remodelling is needed, to better understand IVD development and age-associated degeneration. As so, iTRAQ LC-MS/MS analysis of foetus, young and old bovine NPs, was used to define the NP matrisome. The enrichment of Collagen XII and XIV in foetus, Fibronectin and Prolargin in elder samples and Collagen XI in young ones was independently validated. This study provides the first matrisome database of healthy discs during development and ageing, which is key to determine the pathways and processes that maintain disc homeostasis. The factors identified may help to explain age-associated IVD degeneration or constitute putative effectors for disc regeneration.

2017-09-25 | PXD005616 | Pride

Sphingosine-1-phosphate induces pro-remodelling response in airway smooth muscle cells

Project description:Background: Increased proliferation of airway smooth muscle (ASM) cells leading to hyperplasia and increased ASM mass is one of the most characteristic features of airway remodelling in asthma. A bioactive lipid, sphingosine-1-phosphate (S1P), has been suggested to affect airway remodelling by stimulation of human ASM cell proliferation. Objective: To investigate the effect of S1P on signalling and regulation of gene expression in ASM cells from healthy and asthmatic individuals. Methods: ASM cells grown from bronchial biopsies of healthy and asthmatic individuals were exposed to S1P. Gene expression was analysed using microarray, real-time PCR and western blotting. Receptor signalling and function was determined by mRNA knockdown and intracellular calcium mobilisation experiments. Results: S1P potently regulated the expression of more than 80 genes in human ASM cells, including several genes known to be involved in the regulation of cell proliferation and airway remodelling (HBEGF, TGFB3, TXNIP, PLAUR, SERPINE1, RGS4). S1P acting through S1P2 and S1P3 receptors activated intracellular calcium mobilisation and extracellular signal-regulated and Rho-associated kinases to regulate gene expression. S1P-induced responses were not inhibited by corticosteroids and did not differ significantly between ASM cells from healthy and asthmatic individuals. Conclusion: S1P induces a steroid-resistant, pro-remodelling pathway in ASM cells. Targeting S1P or its receptors could be a novel treatment strategy for inhibiting airway remodelling in asthma. Airway smooth muscle cells from 3 healthy donors were cultured and stimulated for 4 h with sphingosine-1-phosphate (100 nM) or medium control. Total RNA was extracted and analysed using Affymetrix Human Exon 1.0 ST arrays.

2015-06-18 | E-GEOD-58657 | biostudies-arrayexpress

Heterobasidion irregulare gene expression from different tissues and mycelium grown on different substrates

Project description:Transcript profiles of Heterobasion irregulare from different tissues and mycelium grown on different substrates were analyzed. The array probes were designed from gene models taken from the Joint Genome Institute (JGI, department of energy) Heterobasidion annosum genome sequence version 1. One aim of this study was to verify the expression of the automatically annotated gene models under various conditions. Another goal was to compare gene expression profiles from different tissues of Heterobasidion irregulare and from mycelium grown on liquid MMN medium, liquid medium amended with lignin or cellulose and on wood. The Heterobasidion annosum custom-exon expression array (4 x 72K) manufactured byRoche NimbleGen Systems Limited (Madison, WI) (http://www.nimblegen.com/products /exp/index.html) contained five independent, nonidentical, 60-mer probes per gene model coding sequence. For 12,199 of the 12,299 annotated protein-coding gene models probes could be designed. For 19 gene models no probes could be generated and 81 gene models shared all five probes with other gene models. Included in the array were 916 random 60-mer control probes and labelling controls. For 2032 randomly chosen gene models, technical duplicates were included on the array. We performed 18 hybridizations (NimbleGen) with samples derived from Heterobasidion irregulare fruiting bodies (four biological replicates) , from necrotic bark of pines inoculated with H. irregulare (21dpi; three biological replicates), from H. irregulare mycelium grown in liquid MMN medium (three biological replicates) as well as from H. irregulare grown on wood shavings from pine (four biological replicates), grown in liquid medium amended with lignin (2 biological replicates) and growth in liquid medium amended with cellulose from Spruce (2 biological replicates). Cultures were harvested after 3 weeks of incubation 22°C in darkness. All samples were labeled with Cy3.

2012-03-15 | E-GEOD-30230 | biostudies-arrayexpress

Laccaria-Douglas fir: A Timecourse of Mycorrhizal Root Tip Development

Project description:This study characterizes the transcriptomic alterations of Laccaria bicolor S238N during interaction with Pseudotsuga menziesii. Three time-points were analyzed, two weeks, four weeks and six weeks after inoculation and compared to the transcriptome of free-living mycelium from Laccaria bicolor S238N. We performed 9 hybridizations (NimbleGen) with samples derived from Pseudotsuga menziesii /L.bicolor mycorrhizal root tips. Samples were taken after 2,4 and 6 weeks of interaction (three biological replicates). These samples were compared to free-living mycelium from Laccaria bicolor S238N (three biological replicates). All samples were labeled with Cy3.

2014-10-10 | E-GEOD-62226 | biostudies-arrayexpress

Laccaria-Poplar: A Timecourse of Mycorrhizal Root Tip Development

Project description:This study characterizes the transcriptomic alterations of Laccaria bicolor S238N during interaction with P. trichocarpa. Four time-points were analyzed, two weeks, four weeks , six weeks and twelve weeks after inoculation and compared to the transcriptome of free-living mycelium from Laccaria bicolor S238N We performed 16 hybridizations (NimbleGen) with samples derived from P.trichocarpa/L.bicolor mycorrhizal root tips. Samples were taken after 2,4,6 and 12 weeks of interaction (four biological replicates). These samples were compared to free-living mycelium from Laccaria bicolor S238N (three biological replicates). All samples were labeled with Cy3.

2014-10-10 | E-GEOD-62225 | biostudies-arrayexpress

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