A probiotic nanozyme hydrogel regulates vaginal microenvironment for vaginitis therapy.

Molecular therapeutics are limited for vaginitis because they damage normal cells and tissues of vagina, aggravating the imbalance of vaginal microbiota and increasing the recurrence. To tackle this limitation, through the combination of peroxidase-like rGO@FeS nanozymes [reduced graphene oxide (rGO)] with -produced lactic acid and HO, a responsive hyaluronic acid (HA) hydrogel rGO@FeS/@HA (FeLab) is developed. FeLab has simultaneous anti- and vaginal microbiota-modulating activities. In particular, the hydroxyl radical produced from rGO@FeS nanozymes and kills isolated from clinical specimens without affecting . In mice with vaginitis, FeLab has obvious anti- activity but hardly damages vaginal mucosa cells, which is beneficial to vaginal mucosa repair. Moreover, a higher proportion of (especially ) and a decrease in reshape a healthy vaginal microbiota to reduce the recurrence. These results provide a combined therapeutic of nanozymes and probiotics with translational promise for vaginitis therapy.