An international team of scientists, headed by a team at Nanyang Technological University, Singapore (NTU Singapore), has discovered a new way that could speed up the healing of chronic wounds infected by antibiotic-resistant bacteria. Collaborating with researchers at the University of Geneva, the team’s preclinical study showed how a common bacterium, Enterococcus faecalis, actively prevents wound healing. The results of their collective studies in mice and in human cells showed that, unlike other bacteria, which produce toxins when they infect wounds, E. faecalis produces reactive oxygen species (ROS), which impairs the healing process of human skin cells. The team identified extracellular electron transport (EET) as a previously unrecognized mechanism by which E. faecalis generates ROS, which, in turn, activates the unfolded protein response (UPR) in epithelial cells and impedes their migration following wounding. The study also demonstrated how neutralizing this biological process can allow skin cells to recover and close wounds. Establishing a direct link between bacterial metabolism and host cell dysfunction, the study points to a potential new therapeutic strategy for chronic wounds. Co-senior and co-corresponding author, NTU associate professor Guillaume Thibault, PhD, at the School of Biological Sciences, and colleagues reported on their findings in Science Advances, in a paper titled “Enterococcus faecalis redox metabolism activates the unfolded protein response to impair wound healing,” in which they concluded, “Our findings establish EET as a virulence mechanism that links bacterial redox metabolism to host cell stress and impaired repair, offering new avenues for therapeutic intervention in chronic infections.” The study was…
