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Poster communications

S. aureus and E. coli induce IL-32 gene expression to different extents during infection of bovine mammary gland epithelial cells

Abstract : Introduction: While the role of many cytokines during infection is known, the implication of recently discovered cytokines is not well defined. The involvement of recently described interleukin-32 in infectious mastitis, caused by two prevalent mastitis pathogens, Staphylococcus aureus and Escherichia coli, has not been investigated so far and we present initial results. Material and Methods: Two bovine mammary gland epithelial cells lines (BME-UV and PS) were infected with bovine infectious mastitis organisms E. coli or S. aureus. Using RT- qPCR the kinetics of IL-32, IL-6 and IL-8 gene expression was determined. Results: E. coli induces a weak IL-6 expression in BME-UV and a strong IL-6 expression in PS cells, while a faint IL-6 expression was observed during S. aureus infection in both cell lines. IL-8 expression was detected during the exposure to both pathogens with the strongest signal in E. coli-infected PS cells. Regarding IL-32 expression, different responses were observed in cells exposed to E. coli and S. aureus strains: while IL-32 expression was increased in both cell lines infected with E. coli, there was a decrease of IL-32 expression in cells exposed to S. aureus strains. Conclusion: Taking into account that endogenous IL-32 controls the production of IL-6, IFN-γ and TNF-α during some infection, the decrease of IL-32 expression in cells exposed to S. aureus, could be partially responsible for the weak immune response during staphylococcal infection, which may be favorable for the development of chronic mastitis.
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Poster communications
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https://hal.archives-ouvertes.fr/hal-01454530
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Submitted on : Thursday, February 2, 2017 - 9:31:29 PM
Last modification on : Wednesday, April 6, 2022 - 4:08:15 PM

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  • HAL Id : hal-01454530, version 1
  • PRODINRA : 326812

Citation

Martine Deplanche, L. Alexeeva, Pierre Germon, Pascal Rainard, Frederic Dessauge, et al.. S. aureus and E. coli induce IL-32 gene expression to different extents during infection of bovine mammary gland epithelial cells. 4. European Congress of Immunology, Sep 2015, Vienne, Austria. 2015, Abstract book. ⟨hal-01454530⟩

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