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Ferreyra Maillard, Anike P.V.; Espeche, Juan Carlos; Maturana, Patricia; Cutro, Andrea C.; Hollmann, Axel
Biochimica et biophysica acta. Biomembranes, 06/2021, Volume: 1863, Issue: 6Journal Article
This review summarizes the theory of zeta potential (ZP) and the most relevant data about how it has been used for studying bacteria. We have especially focused on the discovery and characterization of novel antimicrobial compounds. The ZP technique may be considered an indirect tool to estimate the surface potential of bacteria, a physical characteristic that is key to maintaining optimal cell function. For this reason, targeting the bacterial surface is of paramount interest in the development of new antimicrobials. Surface-acting agents have been found to display a remarkable bactericidal effect and have simultaneously revealed a low tendency to trigger resistance. Changes in the bacterial surface as a result of various processes can also be followed by ZP measurements. However, due to the complexity of the bacterial surface, some considerations regarding the assessment of ZP must first be taken into account. Evidence on the application of ZP measurements to the characterization of bacteria and biofilm formation is presented next. We finally discuss the feasibility of using the ZP technique to assess antimicrobial-induced changes in the bacterial surface. Among these changes are those related to the interaction of the agent with different components of the cell envelope, membrane permeabilization, and loss of viability. Display omitted •Advanced instruments to measure the ZP in an easy and economic way underline the applications of this technique to bacteria.•Zeta potential can be used as a diagnostic tool in bacteria.•Zeta potential can provide information about membrane permeability and viability, among other variables, in bacteria.•Zeta potential has an enormous potential for assessing the interactions of novel antimicrobial compounds with bacteria.
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