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    The liver proteome in a mouse model for Ascaris suum resistance and susceptibility: evidence for an altered innate immune response


    Deslyper, Gwendoline and Holland, Celia V. and Colgan, Thomas J. and Carolan, James C. (2019) The liver proteome in a mouse model for Ascaris suum resistance and susceptibility: evidence for an altered innate immune response. Parasites & Vectors, 12 (402). ISSN 1756-3305

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    Abstract

    Background: Ascariasis is a neglected tropical disease that affects 800 million people worldwide. Whereas most people only experience light worm burden, some people experience heavy worm burdens even after several rounds of chemotherapy, a phenomenon known as predisposition. Such heavy infections are associated with more severe symptoms and increased chronic morbidity. Methods: In order to investigate potential mechanisms that may explain the observed predisposition, we infected mice with the porcine ascarid Ascaris suum using an established mouse model with two different mouse strains, where the C57BL/6J strain is more susceptible to infection and therefore a model for heavy infection and the CBA/Ca strain is more resistant and thus a model for light infection. At day 7 post-infection we investigated the liver proteome, using shotgun mass spectrometry, of both infected and control mice of each strain. Results: We identified intrinsic differences, between the two mouse strains, in both oxidative phosphorylation proteins and proteins involved in retinol metabolism. Additionally, we found differences between the two mouse strains in activation of the complement system, where the CBA/Ca strain has higher protein abundances for lectin pathway proteins and the C57BL/6J strain has higher protein abundances for complement inhibiting proteins. The CBA/Ca strain had a higher abundance of proteins involved in the activation of the complement cascade via the lectin pathway. In contrast, the C57BL/6J strain demonstrated a higher abundance of proteins involved in arresting the complement pathway. Conclusions: We observed clear differences between the two mouse strains both intrinsically and under infection.

    Item Type: Article
    Additional Information: © The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creat iveco mmons .org/licen ses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/ publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
    Keywords: Ascaris; Liver; Proteome; Shotgun mass spectrometry; Innate immune response; Mitochondria; Retinol;
    Academic Unit: Faculty of Science and Engineering > Biology
    Item ID: 11021
    Identification Number: https://doi.org/10.1186/s13071-019-3655-9
    Depositing User: James Carolan
    Date Deposited: 05 Sep 2019 11:41
    Journal or Publication Title: Parasites & Vectors
    Publisher: BMC
    Refereed: Yes
    Funders: Irish Research Council (IRC)
    URI:

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