Project description:The rapid global rise of antimicrobial resistance (AMR) that increasingly invalidates conventional antibiotics has become a huge threat to human health. Although nanosized antibacterial agents have been extensively explored, they cannot sufficiently discriminate between microbes and mammals, which necessitates the exploration of other antibiotic-like candidates for clinical uses. Herein, two-dimensional boron nitride (BN) nanosheets are reported to exhibit antibiotic-like activity to AMR bacteria. Interestingly, BN nanosheets had AMR-independent antibacterial activity without triggering secondary resistance in their long-term use and displayed excellent biocompatibility in mammals. Surface proteome analysis coupled with molecular dynamic simulations and Bio-Layer Interferometry revealed that BN nanosheets could rapidly interact with the key surface proteins of cell division including FtsP, EnvC, and TolB, resulting in a specific antibacterial mechanism by impairment of Z-ring constriction in cell division. Notably, BN nanosheets had a potent antibacterial effect in a lung infection model by P. aeruginosa (AMR), displaying a two-fold increment of survival rate. Overall, these results suggested that BN nanosheets could be a promising nano-antibiotic to combat resistant bacteria and prevent AMR evolution.
Project description:Self-resistance mechanism mediated by N-acetyltransferase PamZ by deactivation of own antibacterial agent paenilamicin in Paenibacillus larvae, the causative agent of the honey bee disease American Foulbrood.
Project description:The focus of this submission is to genetically identify the population fingerprint of the contemporary population and sub-populations of Northern Lebanon. To this end, the HumanOmniExpress 12 array has been used to comprehensively genotype 344 selected samples from different communities. The samples were collected with careful scrutiny to their heritage, documenting at least two generations of ancestry for each sample.