Curcumin delivery system based on a chitosan–liposome encapsulated zeolitic imidazolate framework-8: a potential treatment antioxidant and antibacterial treatment after phacoemulsification

Curcumin is a natural polyphenol extracted from plants that can interact with various molecular targets, including antioxidant, antibacterial, anticancer, and anti-aging activities. Due to its variety of pharmacological activities and large margin pf safety, curcumin has been used in the prevention and treatment of various diseases, such as Alzheimer's, heart, and rheumatic immune diseases. To develop curcumin eye drops that can be used as antioxidant and antibacterial agents after phacoemulsification, we have designed a nano-based drug delivery system to improve curcumin bioavailability and duration of action. We successfully prepared zeolitic imidazolate framework-8 (ZIF-8) coated with chitosan–liposome (Cur@ZIF-8/CS-Lip) for curcumin delivery. It can release curcumin for over 20 h in vitro and exhibits excellent biosafety, antioxidant, and antibacterial activities. Therefore, we hypothesized that Cur@ZIF-8/CS-Lip could reduce the incidence of oxidative stress and infection after cataract surgery.