Abstract
Background: Coenzyme Q10 (Q10) is a powerful lipophilic antioxidant with poor solubility in aqueous media. Curcumin (Cur) is a natural polyphenolic phytochemical molecule with poor aqueous solubility. The liposome is an improved administration of drugs because it is biocompatible and permeable for nutraceutical delivery. Chitosan, a hydrophilic polymer, is often used as a polymer coating for its good biocompatible and biodegradable properties, and its relatively low toxicity level.
Methods: Q10 and Cur co-loaded liposomes coated with chitosan (Q10-Cur-Lip-Chi) were constructed. The co-encapsulation of Q10 and Cur in liposomes coated with chitosan was verified by TEM, DLS, DSC, FT-IR, and XRPD. The release profile and antioxidant activity of Q10-Cur-Lip-Chi were accessed.
Results: The particle size of Q10-Cur-Lip-Chi was about 1440 nm with narrow particle distribution. A satisfactory encapsulation efficiency (EE) of Q10 was about 98%, and 25% for that of Cur. Q10-Cur- Lip-Chi showed higher solubility and better pH resistance with 98.5% of Q10 and Cur retention at pH 7.0 - 9.0. Q10-Cur-Lip also showed great salt stability with a vesicle size change of less than 5%. PSof Q10-Cur-Lip-Chi changed less than 10% at 4°C of storage. Q10-Cur-Lip-Chi also exhibited a good controlled release profile with its accumulative release of less than 34% for Q10 and 30% for curcumin after 24 h. The Q10-Cur-Lip-Chi performed a synergistic effect on antioxidant activity reaching 41.86±1.84%, which was 5.9 times higher than that of Q10, 2.5 times higher than that of Cur, and 1.7 times higher than that of the mixture.
Conclusion: The co-encapsulation Q10-Cur-Lip-Chi improves the solubility and stability of Q10 and Cur for good release performance and antioxidative activity.
Keywords: Coenzyme Q10, Curcumin, Liposomes, Co-encapsulation
Graphical Abstract
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