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Gene expression analysis to characterize similarities and differences in T. canis- or T. cati-induced neurotoxocarosis

ABSTRACT: Larvae of Toxocara canis and T. cati show affinities to different tissues within the paratenic host. T. canis preferably migrates to the CNS whereat T. cati prefers muscle tissue. As both species share many characteristics like antigen fractions, reasons for this behaviour as well as underlying pathomechanisms or host reactions towards the respective parasite are unknown. Therefore, it was aimed to characterize the general pathogenesis as well as the respective host's reaction on the transcriptional level to identify similarities and differences between T. canis- and T. cati-infected brains.

ORGANISM(S): Mus musculus

PROVIDER: GSE66094 | GEO | 2015/12/31

SECONDARY ACCESSION(S): PRJNA275865

REPOSITORIES: GEO

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Gene expression analysis to characterize similarities and differences in T. canis- or T. cati-induced neurotoxocarosis

Project description:Larvae of Toxocara canis and T. cati show affinities to different tissues within the paratenic host. T. canis preferably migrates to the CNS whereat T. cati prefers muscle tissue. As both species share many characteristics like antigen fractions, reasons for this behaviour as well as underlying pathomechanisms or host reactions towards the respective parasite are unknown. Therefore, it was aimed to characterize the general pathogenesis as well as the respective host's reaction on the transcriptional level to identify similarities and differences between T. canis- and T. cati-infected brains. Transcriptional changes in cerebra as well as cerebella of T. canis- and T. cati-infected C57Bl/6J mice were analysed 42 days post infection. In each infection group, 3 animals were included and 4 animals in the uninfected control.

2015-12-31 | E-GEOD-66094 | biostudies-arrayexpress

Toxocara canis- and Toxocara cati-induced neurotoxocarosis is associated with comprehensive brain transcriptomic alterations

Project description:Migration and persistence of Toxocara canis and T. cati larvae in brains of paratenic hosts, including humans, may induce the disease neurotoxocarosis (NT). Along with various clinical symptoms, neurodegenerative and neuropsychiatric disorders have been described as a consequence of the disease. As most knowledge on NT is derived from only a few published clinical cases, information regarding underlying pathomechanisms and host’s response to Toxocara remain scarce. Therefore, it was aimed to characterize the general pathogenesis as well as the respective host's reaction on the transcriptional level in brains of T. canis- and T. cati C57BL/6J mice as a model for paratenic hosts.

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Project description:Toxocariasis is an important, neglected zoonosis caused mainly by Toxocara canis. Although our knowledge of helminth molecular biology is improving through completed draft genome projects, there is limited detailed information on the molecular biology of Toxocara species. Here, transcriptomic sequencing of male and female adult T. canis and comparative analyses were conducted. For each sex, two-thirds (66-67%) of quality-filtered reads mapped to the gene set of T. canis, and at least five reads mapped to each of 16,196 (87.1%) of all 18,596 genes, and 321 genes were specifically transcribed in female and 1467 in male T. canis. Genes differentially transcribed between the two sexes were identified, enriched biological processes and pathways linked to these genes established, and molecules associated with reproduction and development predicted. In addition, small RNA pathways involved in reproduction were characterized, but there was no evidence for piwi RNA pathways in adult T. canis. The results of this transcriptomic study should provide a useful basis to support investigations of the reproductive biology of T. canis and related nematodes.

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