The application discloses a controllable release
gallium-
iron chelator composite nanohydrogel and a preparation method and application thereof. The nanohydrogel is formed by compounding
gallium ions, iron chelators and a suitable
polymer carrier, and can realize time and space controllable release. The nanohydrogel can first deplete the available iron of pathogens in an infection or
inflammation microenvironment, induce the iron starvation response of the pathogens, and then slowly release
gallium ions to simulate the role of iron, enter the
pathogen cells and interfere with the iron-dependent
metabolism, so as to synergistically play the roles of anti-infection and protection of host cells. The nanohydrogel can still maintain
antibacterial activity in a high iron environment of pathogens through a double iron capture mechanism, and can inhibit iron-dependent
cell death (such as
ferroptosis) and
inflammation cascade reaction of the host. The nanohydrogel has good
biocompatibility, organ targeting and controllable release characteristics, can be prepared into a local
drug preparation or a systemic delivery preparation, is suitable for prevention and / or treatment of diseases related to fungal or bacterial infection, and has a significant application prospect.