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Dermal quercetin smartCrystals®: Formulation development, antioxidant activity and cellular safety.
Summary
Flavonoids like quercetin have poor solubility, limiting their use. Quercetin nanocrystals, produced using smartCrystals® technology, significantly improved solubility and dissolution, offering a promising dermal delivery system.
Area of Science:
- Pharmacology and Pharmaceutics
- Materials Science
- Biochemistry
Background:
- Flavonoids, such as quercetin, are potent antioxidants with limited bioavailability due to poor water solubility.
- Developing effective delivery systems is crucial for harnessing the therapeutic potential of flavonoids in topical applications.
Purpose of the Study:
- To develop and characterize quercetin nanocrystals using smartCrystals® technology for enhanced dermal delivery.
- To evaluate the physicochemical properties, solubility, dissolution, antioxidant activity, and cellular interactions of quercetin nanocrystals.
Main Methods:
- Quercetin nanocrystals were produced via bead milling and high-pressure homogenization (smartCrystals® technology).
- Nanosuspensions were formulated into nonionic gels (Lutrol® F127, hydroxyethylcellulose).
- Physicochemical properties, saturation solubility, dissolution velocity (DPPH assay), and cellular toxicity (VERO cells) were assessed.
Main Results:
- Quercetin nanocrystals exhibited a 7.6-fold increase in saturation solubility and dissolution velocity compared to crude quercetin.
- The nanocrystals and gel formulations demonstrated physical stability over three months.
- Antioxidant properties were preserved, and no cellular toxicity was observed; protective effects against oxidative stress were confirmed in vitro.
Conclusions:
- SmartCrystals® technology successfully produced stable quercetin nanocrystals with enhanced solubility and dissolution.
- The nanocrystalline formulation is well-tolerated and preserves quercetin's antioxidant efficacy, presenting a viable approach for efficient quercetin delivery in dermal formulations.
