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Aeromonas Spp. Human Isolates Induce Apoptosis of Murine Macrophages

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Abstract

Interactions of Aeromonas caviae, Aeromonas veronii biotype sobria, and Aeromonas hydrophila strains isolated from fecal specimens of humans with gastroenteritis on murine macrophages, J774 cells, were investigated. Analyses of cellular morphology and DNA fragmentation in phagocytes infected with these strains exhibited typical characteristic features of cells undergoing apoptosis. We observed the morphological changes, including condensation of nuclear chromatin, formation of apoptotic bodies and blebbing of cell membrane, and fragmentation of nuclear DNA into oligonucleosomal fragments. The lowest apoptotic index did not exceed 25%, whereas the highest reached 78% at 24 h and 96% at 48 h after infection. After incubation of J774 cells with cytotoxic enterotoxin isolated from A. veronii biotype sobria strain, we noted that the toxin was able to trigger cytotoxicity and apoptosis of macrophages. The results indicate that apoptosis could be one of the mechanisms contributing to the development of Aeromonas-associated diarrheal disease.

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Authors and Affiliations

  1. Faculty of Biology, Department of Microbiology, A. Mickiewicz University, ul. Umultowska 89, 61-614, Poznań, Poland

    Sylwia Krzymińska, Adam Kaznowski & Magdalena Chodysz

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  1. Sylwia Krzymińska
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  2. Adam Kaznowski
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  3. Magdalena Chodysz
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Correspondence to Adam Kaznowski.

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Krzymińska, S., Kaznowski, A. & Chodysz, M. Aeromonas Spp. Human Isolates Induce Apoptosis of Murine Macrophages. Curr Microbiol 58, 252–257 (2009). https://doi.org/10.1007/s00284-008-9316-4

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  • DOI: https://doi.org/10.1007/s00284-008-9316-4

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