Solubility Enhancement and Antioxidation Maintenance of CBD Encapsulated in the P407-RUB Nano-micelle System.

AIM: The aim of this study is to improve the water solubility and stability of cannabidiol (CBD) utilizing micelle technology.

MATERIALS AND

METHODS

Mixing of rubusoside (RUB) with Poloxamer 407 (P407) was explored as the wall material for the preparation of CBD micelles. In this study, CBD-loaded mixed micelles (CBD-M) composed of P407 and RUB was successfully formed by self-assembly then solid were prepared by solvent evaporation. The saturated solubility of CBD-loaded micelles in water increased to 15.60 mg/mL, 1560-fold compared with its intrinsic solubility (0.01 mg/mL). The average size of CBD-M was 103 ± 2.66 nm and the encapsulation efficiency for CBD was 92.8 + 4.7 %, and 18.6 + 0.94% for drug-loading.

RESULTS

The morphology and encapsulation of CBD-M were characterized by TEM, FI-IR, DSC and TG. The CBD-M solution was stable and CBD-M did not precipitate or leak after being diluted and centrifugated. Besides, CBD-M solution was stable for 6 months at 4°C and room temperature. In vitro antioxidant studies found that the antioxidant activity of CBD remained at the same level after micellization.

CONCLUSION

These results suggest that CBD-M may be a promising and competitive formulation for the delivery of CBD, laying a foundation for improving the bioavailability in the future.