Water influx via aquaporin directly determines necrotic cell death induced by the Bacillus thuringiensis Cry toxin

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Abstract

The Bacillus thuringiensis Cry toxin causes swelling and necrosis in insect cells, but the route(s) and significance of the water influx involved in its cytotoxicity are unclear. Here, we assessed the role of aquaporins (AQPs), known as water channels, in Cry toxin intoxication. An AQP inhibitor did not interfere with any known process to form the toxin pore, but it diminished the cell swelling and loss of membrane integrity induced by the Cry toxin. Overexpression of AQPs facilitated water influx and cytotoxicity. Our results demonstrate that water influx via aquaporin directly determines necrotic cell death induced by the Cry toxin.

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Endo, H., Azuma, M., Adegawa, S., Kikuta, S., & Sato, R. (2017). Water influx via aquaporin directly determines necrotic cell death induced by the Bacillus thuringiensis Cry toxin. FEBS Letters, 591(1), 56–64. https://doi.org/10.1002/1873-3468.12506

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