TY - JOUR Y1 - 2020/03/02/ SN - 1422-0067 TI - Rapamycin Re-Directs Lysosome Network, Stimulates ER-Remodeling, Involving Membrane CD317 and Affecting Exocytosis, in Campylobacter Jejuni-Lysate-Infected U937 Cells N1 - © 2020 by the Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). IS - 6 ID - discovery10094481 KW - CD317/tetherin KW - Campylobacter jejuni KW - ER-remodeling KW - lysosome positioning and exocytosis KW - rapamycin N2 - The Gram-negative Campylobacter jejuni is a major cause of foodborne gastroenteritis in humans worldwide. The cytotoxic effects of Campylobacter have been mainly ascribed to the actions of the cytolethal distending toxin (CDT): it is mandatory to put in evidence risk factors for sequela development, such as reactive arthritis (ReA) and Guillain-Barré syndrome (GBS). Several researches are directed to managing symptom severity and the possible onset of sequelae. We found for the first time that rapamycin (RM) is able to largely inhibit the action of C. jejuni lysate CDT in U937 cells, and to partially avoid the activation of specific sub-lethal effects. In fact, we observed that the ability of this drug to redirect lysosomal compartment, stimulate ER-remodeling (highlighted by ER-lysosome and ER-mitochondria contacts), protect mitochondria network, and downregulate CD317/tetherin, is an important component of membrane microdomains. In particular, lysosomes are involved in the process of the reduction of intoxication, until the final step of lysosome exocytosis. Our results indicate that rapamycin confers protection against C. jejuni bacterial lysate insults to myeloid cells. AV - public JF - International Journal of Molecular Sciences A1 - Canonico, B A1 - Cesarini, E A1 - Montanari, M A1 - Di Sario, G A1 - Campana, R A1 - Galluzzi, L A1 - Sola, F A1 - Gundogdu, O A1 - Luchetti, F A1 - Diotallevi, A A1 - Baffone, W A1 - Giordano, A A1 - Papa, S UR - https://doi.org/10.3390/ijms21062207 VL - 21 ER -