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In vivo activity of Nisin A and Nisin V against Listeria... » Isaúde
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BMC microbiology [electronic resource]
2013-02-02 02:07:36

In vivo activity of Nisin A and Nisin V against Listeria monocytogenes in mice

Descrição: Background:Lantibiotics are post-translationally modified antimicrobial peptides, of which nisin A is the most extensively studied example. Bioengineering of nisin A has resulted in the generation of derivatives with increased in vitro potency against Gram-positive bacteria. Of these, nisin V (containing a Met21Val change) is noteworthy by virtue of exhibiting enhanced antimicrobial efficacy against a wide range of clinical and food-borne pathogens, including Listeria monocytogenes. However, this increased potency has not been tested in vivo.Results:Here we address this issue by assessing the ability of nisin A and nisin V to control a bioluminescent strain of Listeria monocytogenes EGDe in a murine infection model.More specifically, Balb/c mice were infected via the intraperitoneal route at a dose of 1 x 105 cfu/animal and subsequently treated intraperitoneally with either nisin V, nisin A or a PBS control. Bioimaging of the mice was carried out on day 3 of the trial. Animals were then sacrificed and levels of infection were quantified in the liver and spleen.Conclusion:This analysis revealed that nisin V was more effective than Nisin A with respect to controlling infection and therefore merits further investigation with a view to potential chemotherapeutic applications.

Identificador: doi:10.1186/1471-2180-13-23
Volume: 0
Página: 2 a


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