Combinatory microarray and SuperSAGE analyses identify pairing-dependently transcribed genes in Schistosoma mansoni males, including follistatin [SuperSAGE]
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ABSTRACT: Comparing the transcriptomes of pairing-experienced (EM) and pairing-unexperienced (UM) male Schistosoma mansoni (in biological triplicates) we detected 253 genes to be significantly differeantially (p < 1-10; log2ratios < -0.585 or > +0.585) transcribed. pairing-experienced (EM) and pairing-unexperienced (UM) male Schistosoma mansoni were compared by SuperSAGE (Matsumura et al., 2003; with minor changes: Molina et al., 2008), sequencing Illumina (Solexa)
Project description:Transcriptional profiling of S. mansoni pairing-experienced males (EM) vs. pairing unexperienced males (UM) Two conditions (EM vs. UM) with three biological samples of EM and in parallel other three biological samples of UM. For each sample (three EM and three UM) were performed four technical replicas.
Project description:Comparing the transcriptomes of pairing-experienced (EM) and pairing-unexperienced (UM) male Schistosoma mansoni (in biological triplicates) we detected 253 genes to be significantly differeantially (p < 1-10; log2ratios < -0.585 or > +0.585) transcribed.
Project description:Biomphalaria glabrata infection by the Schistosoma mansoni free-swimming miracidium and its subsequent development to the parasitic sporocyst stage is critical to establishment of viable infections and triggers a variety of physiological, biochemical and molecular changes. Here, we describe a genome-wide analysis of the S. mansoni miracidium and developing sporocyst. Keywords: life-cycle, development, host-interaction We generated transcriptomic profiles of the developing larval stages of Schistosoma mansoni using long serial analysis of gene expression (LongSAGE). Five cDNA libraries were constructed from miracidia and in vitro cultured 6- and 20-day old sporocysts maintained in sporocyst medium (SM) or in SM conditioned by previous cultivation with cells of the B. glabrata embryonic (Bge) cell line. From five libraries, 314,799 SAGE tags were sequenced and resulted in a total of 21,440 unique sequence tags. A total of 254 tags were differentially expressed during “conditioned” development and 236 tags were differentially expressed during “un-conditioned” development. In addition, 53 tags were found to be differentially expressed between 6-day conditioned and unconditioned sporocysts and 42 tags between 20-day conditioned and unconditioned sporocysts.
Project description:Nitric oxide (NO) is a gaseous intercellular signaling molecule that also plays a role in host-parasite relations. NO acts rapidly, either via regulation of soluble guanylate cyclase, or by direct interactions with enzymes and other proteins, and has also been shown to have effects on gene expression. Here, we use SAGE (Serial Analysis of Gene Expression) to identify NO-responsive changes in gene expression in Schistosoma mansoni following a 3 hour exposure to sodium nitroprusside, an NO donor. Overall, these results indicate that NO does not rapidly induce large-scale changes in schistosome gene expression, but that expression of particular genes of interest appear to respond to NO. Keywords: Schistosoma, SAGE, NOS, nitric oxide, gene expression Adult S. mansoni perfused from infected Swiss-Webster female mice (obtained from the NIAID Schistosomiasis Resource Center) 42-49 days postinfection were maintained in culture (RPMI medium) overnight and then exposed for 3 hours to either 1 mM sodium nitroprusside (SNP), a well-characterized NO donor, or to RPMI alone. Worms remained viable and motile following treatment. Total RNA was extracted with Trizol (Invitrogen) and treated with DNAse 1 (Ambion) to remove contaminating genomic DNA, and Long-SAGE libraries constructed.
Project description:Transcriptional profiling of TGF-beta treated Schistosoma mansoni adult worms vs. Non-treated Schistosoma mansoni adult worms Two conditions (treated vs. Non-treated) with three biological samples of treated worms (TGF1, 4 and 5) and two biological samples of non-treated worms that were pooled into a single sample (pool). For each sample (three treated or polled non-treated) were performed four technical replicas
Project description:The lung schistosomulum of Schistosoma mansoni is a validated target of protective immunity elicited in vaccinated mice. To identify genes expressed at this stage we constructed a microarray, representing 3088 contigs and singlets, with cDNA derived from in vitro cultured larvae, and used it to screen RNA from seven life cycle stages. Clustering of genes by expression profile across the life cycle revealed a number of membrane, membrane-associated and secreted proteins up-regulated at the lung stage, that may represent potential immune targets. Two promising secreted molecules have homlogy to antigens with vaccine and/or immunomodulatory potential in other helminths.