Abstract
Epsilon toxin (ETX) produced by Clostridium perfringens types B and D is a potent toxin that is responsible for fatal enterotoxaemia. In vitro, ETX, which is considered as a pore-forming toxin, forms a heptamer in Madin–Darby canine kidney (MDCK) cell membranes, which is considered to be a pre-pore stage. After binding of the ETX, vacuoles inside cell cytoplasm are produced. ETX causes decreased levels of essential coenzymes required for host cell energy. Here, we optimized and applied acoustic flow cytometry analysis in order to gain further insight into ETX-pathogenesis. Using acoustic flow cytometer analysis, which considered highly sensitive, ETX-exposed MDCK cells revealed mitochondrial membrane decreases followed by 25.48% and 45.45% of the exposed cells expressing the Bax and BCL-2 proteins at a pre-pore stage, respectively. These results together with high cytotoxicity and visualization of cell vacuoles, demonstrates that acoustic flow cytometry analysis potentially represents an effective tool to study ETX pathogenesis.
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