TNF as biomarker for rapid quantification of active Staphylococcus enterotoxin a in food

6Citations
Citations of this article
11Readers
Mendeley users who have this article in their library.

Abstract

Staphylococcus aureus is a major bacterial pathogen which causes clinical infections and food poisoning. This bacterium produces a group of twenty-one enterotoxins (SEs). These enterotoxins have two separate but related biological activities. They cause gastroenteritis and function as superantigens that activate large numbers of T cells. The current method for detection of enterotoxins activity is an in vivo monkey or kitten bioassay; however, this method is not practical to test on a large number of samples. Several immunological assays have been developed however, but these assays cannot distinguish between active toxin which causes food poisoning and inactive toxin, which can bind antibody, but shows no toxicity. The current study demonstrates that short term ex vivo exposure of primary naïve CD4(+) T-cells or splenocytes to SEA induces differential expression and secretion of tumor necrosis factor (TNF) protein. We used immunomagnetic beads coated with anti-SEA antibody to specifically isolate SEA from food. After the eluted toxin was added to the cells SEA biological activity was measured by quantifying TNF protein expression or secretion.

Cite

CITATION STYLE

APA

Rasooly, R., & Hernlem, B. (2012). TNF as biomarker for rapid quantification of active Staphylococcus enterotoxin a in food. Sensors (Switzerland), 12(5), 5978–5985. https://doi.org/10.3390/s120505978

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free