New horizons for therapeutic applications of nanozymes in oral infection

As a category of nanomaterials with excellent catalytic efficiency,great substrate specificity,and highrecovery efficiency,nanozymes have attracted increasing attention in various biomedical applications.Currently,numbers of nanozyme-assisted strategies have been well developed for the theranostics ofvarious diseases by taking advantages of their multienzyme-like characteristics,low cost,and highstability.As the most prevalent oral diseases,oral infection poses a global hazard to human health,andcurrent therapeutic options are insufficient to resolve all the clinical issues.Based on their admirableactivity,nanozymes can be frequently employed in the identification and treatment of various oral infectious disorders.Herein,we provide a brief review focused on the classification of nanozymes,analysesof nanozyme-based antibacterial mechanism,research progress in oral bacterial control,and representative studies of nanozyme-assisted oral inflammatory management.Moreover,major challenges andpotential opportunities regarding the use of nanozymes in oral infectious diseases are also highlightedand discussed.This review not only summarizes the recent studies of nanozymes in oral infection butalso promotes the further development of enzyme-mimetic strategies towards various oral diseases.

Copper-based nanodots as efficient biomimetic antibiotics for the treatment of oral bacterial infections Author links open overlay panel

Oral infectious diseases caused by a variety of pathogenic bacteria seriously affect the quality of life.However,these diseases remain a clinical challenge because of the lack of simple,safe,and universal prophylactics.To address these limitations,we synthesize CuO_(x)nanodots(CuO_(x)NDs)with excellent Fenton-like reaction activity and utilize them in the treatment of oral bacterial infections.Different from other complicated approaches,CuO_(x)NDs are rationally prepared using a facile one-pot aqueous synthesis.In the presence of H_(2)O_(2),these well-developed CuO_(x)NDs can efficiently catalyze the generation of hydroxyl radicals(·OH)around oral pathogens,leading to the death of various bacteria.Meanwhile,results of biosafety indicate the high biocompatibility and extremely low toxicity of these CuO_(x)NDs.After understanding the admirable in vitro antibacterial effect of CuO_(x)NDs in the presence of H_(2)O_(2),we further explore their in vivo antibacterial performance on several classical animal models including oral mucosal wound model,intragingival bacteria-infected model,and the periodontal infection model.As expected,these CuO_(x)NDs with wide-spectrum antibacterial activity can serve as high-performance antibacterial reagents for the treatment of various oral bacterial infections with the help of H_(2)O_(2).In brief,current nanoplatform can act as efficient antibiotics against oral pathogens with broadening the biomedical applications of copper-based nanomaterials.