Cambios en el perfil proteico de E. coli O157:H7 frente al tratamiento con Ib-M1 e IONP@Ib-M1

Escherichia coli O157:H7 is a pathogenic bacterium that causes Foodborne Diseases. These diseases become a public health problem since strains resistant to different antibiotics have been found. The Ib-M1 peptide and its bioconjugate in magnetic iron oxide nanoparticles (IONP@Ib-M1) have emerged as a new antimicrobial alternative against E. coli O157:H7 and clinical isolates. The mechanism of action of Ib-M1 and IONP@Ib-M1 against E. coli O157:H7 is still unknown, therefore, the objective of this research is to identify the change in the protein profile of E. coli O157:H7 after treatment with Ib-M1 and IONP@Ib-M1, as a first step to determine the mechanism of action on the pathogen. For this, the obtaining of intracellular proteins was carried out, subsequently a two-dimensional electrophoresis was carried out to finally carry out the determination of the variability of the protein profiles. Once the protein profiles were obtained, an analysis of variance (ANOVA) was carried out. The results show the identification of proteins differentially expressed and which are involved in chemotaxis, protein synthesis and maintenance, redox processes, cell growth, amino acid transport, and translation inhibition.