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    Characterisation of the cellular and proteomic response of Galleria mellonella larvae to the development of invasive aspergillosis


    Sheehan, Gerard and Clarke, Gráinne and Kavanagh, Kevin (2018) Characterisation of the cellular and proteomic response of Galleria mellonella larvae to the development of invasive aspergillosis. BMC Microbiology, 18 (63). ISSN 1471-2180

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    Abstract

    Background: Galleria mellonella larvae were infected with conidia of Aspergillus fumigatus and the cellular and humoral immune responses of larvae to the pathogen were characterized as invasive aspergillosis developed. Results: At 2 h post-infection there was an increase in hemocyte density to 7.43 ± 0.50 × 106/ml from 0.98 ± 0.08 × 106/ml at 0 h. Hemocytes from larvae immune primed for 6 h with heat killed A. fumigatus conidia displayed superior anti-fungal activity. Examination of the spread of the fungus by Cryo-imaging and fluorescent microscopy revealed dissemination of the fungus through the larvae by 6 h and the formation of distinct nodules in tissue. By 24 h a range of nodules were visible at the site of infection and at sites distant from that indicating invasion of tissue. Proteomic analysis of larvae infected with viable conidia for 6 h demonstrated an increase in the abundance of gustatory receptor candidate 25 (37 fold), gloverin-like protein (14 fold), cecropin-A (11 fold). At 24 h post-infection gustatory receptor candidate 25 (126 fold), moricin-like peptide D (33 fold) and muscle protein 20-like protein (12 fold) were increased in abundance. Proteins decreased in abundance included fibrohexamerin (13 fold) and dimeric dihydrodiol dehydrogenase (8 fold). Conclusion|: The results presented here indicate that G. mellonella larvae may be a convenient model for studying the stages in the development of invasive aspergillosis and may offer an insight into this process in mammals.

    Item Type: Article
    Additional Information: © The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/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: Aspergillus; Galleria; Infection; Immunity; Invasive aspergillosis; Granuloma; Mini-model;
    Academic Unit: Faculty of Science and Engineering > Biology
    Item ID: 11073
    Identification Number: https://doi.org/10.1186/s12866-018-1208-6
    Depositing User: Dr. Kevin Kavanagh
    Date Deposited: 23 Sep 2019 12:56
    Journal or Publication Title: BMC Microbiology
    Publisher: BMC
    Refereed: Yes
    URI:

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