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Gender associated differential gene expression in Schistosoma mansoni adult worms

ABSTRACT: The complex molecular systems involved in the process of sex-differentiation and fertility in Schistosoma mansoni have not yet been completely described. Using a 4608-element cDNA microarray, we have now determined 90 and 139 genes with significantly (q-value ≤ 0.06) higher expression levels in adult males and females, respectively. Eight out of eleven selected transcripts had their differential expression levels validated by Real-Time RT-PCR. One of these transcripts was extended by RT-PCR and was shown to span the intronic region between exons 9 to 11 of the S. mansoni CA150 gene, a transcriptional cofactor known in humans to interact with both RNA polymerase II and the spliceosome complex. The longer transcript probably represents a novel isoform of S. mansoni CA150. Additionally, we obtained full-length sequences for 3 other isoforms of the SmCA150 gene, coding for proteins of different lengths and domain compositions. Semi-quantitative RT-PCR showed different expression ratios among these isoforms between male and female. Due to the role of CA150 in RNA transcription and processing, we hypothesize that these differential expression events may be important in the generation and maintenance of the different phenotypes between male and female. Keywords: comparative gender gene expression

ORGANISM(S): Schistosoma mansoni

PROVIDER: GSE5233 | GEO | 2006/08/24

SECONDARY ACCESSION(S): PRJNA96439

REPOSITORIES: GEO

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Project description:Schistosoma mansoni is a flatworm that causes schistosomiasis, a neglected tropical disease that affects over 200 million people worldwide. New therapeutic targets are needed with only one drug available for treatment and no vaccine. Long non-coding RNAs (lncRNAs) are transcripts longer than 200 nucleotides with low or no protein-coding potential. In other organisms, they have been shown as involved with reproduction, stem cell maintenance and drug resistance, and they tend to exhibit tissue-specific expression patterns. S. mansoni expresses thousands of lncRNA genes; however, the cell type expression patterns of lncRNAs in the parasite remain uncharacterized. Here, we have re-analyzed public single-cell RNA-sequencing (scRNA-seq) data obtained from adult S. mansoni to identify the lncRNAs signature of adult schistosome cell types. A total of 8023 lncRNAs (79% of all lncRNAs) was detected. Analyses of the lncRNAs expression profiles in the cells using statistically stringent criteria were performed to identify 74 lncRNA gene markers of cell clusters. Male gamete and tegument lineage clusters contained most of the cluster-specific lncRNA markers. We also identified lncRNA markers of specific neural clusters. Whole-mount in situ hybridization (WISH) and double fluorescence in situ hybridization were used to validate the cluster-specific expression of 13 out of 16 lncRNA gene markers (81%) in the male and female adult parasite tissues; for one of these 16 gene loci, probes for two different lncRNA isoforms were used, which showed differential isoforms usage in testis and ovary. An atlas of the expression profiles across the cell clusters of all lncRNAs detected in our analysis is available as a public website resource. The results presented here give strong support to a tissue-specific expression and to a regulated expression program of lncRNAs in S. mansoni. This will be the basis for further exploration of lncRNA genes as potential therapeutic targets.

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Gender associated differential gene expression in Schistosoma mansoni adult worms

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