Curcumin-Loaded ZIF-8 Nanomaterials: Exploring Drug Loading Efficiency and Biomedical Performance

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Curcumin exhibits potent anti-inflammatory, antioxidant, and wound-healing properties.
• Limited bioavailability, poor solubility, and rapid degradation hinder curcumin's therapeutic use.
• Zeolitic imidazole framework (ZIF-8) offers a high surface area and tunable pores for drug delivery.

Purpose of the Study:

• To develop curcumin-loaded ZIF-8 nanoparticles (cur@ZIF-8) to overcome curcumin's limitations.
• To evaluate the physicochemical properties, stability, and efficacy of cur@ZIF-8.
• To explore the potential of cur@ZIF-8 in biomedical applications, particularly wound healing.

Main Methods:

• Solvothermal synthesis of ZIF-8.
• Encapsulation of curcumin within the ZIF-8 porous structure.
• Characterization of cur@ZIF-8, including drug loading, surface area, pore volume, stability, cytotoxicity, and antibacterial activity.

Main Results:

• Optimized cur@ZIF-8 (0.5 mg/mL) achieved high drug loading efficiency (85.91%) and capability (12.93%).
• cur@ZIF-8 maintained ZIF-8's structural integrity while exhibiting enhanced thermal stability and antibacterial efficacy (99%).
• cur@ZIF-8 demonstrated reduced cytotoxicity, improved antioxidant properties, and pH-dependent drug release favoring acidic wound environments.

Conclusions:

• cur@ZIF-8 nanoparticles effectively enhance curcumin's properties, addressing limitations in solubility and stability.
• The enhanced nanoparticles show significant potential for wound healing due to improved drug release kinetics in acidic conditions.
• The biocompatibility and stability of cur@ZIF-8 underscore their promise for broad biomedical applications.