Title:Improved Bioavailability and Hepatoprotective Activity of Baicalein Via a
Self-assembled Solutol HS15 Micelles System
Volume: 21
Issue: 3
Author(s): Shuna Zhang, Ying Wang, Jiaojiao Shan, Xueju Qi and Qun Liu*
Affiliation:
- Department of Pharmacy, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, China
Keywords:
Acute liver injury, baicalein, solutol hs15, oral delivery, hepatoprotective, CCl4.
Abstract:
Background: Baicalein (BA) is a flavonoid extract from the root of Scutellaria baicalensis
Georgi with excellent biological activities, such as antioxidant and anti-inflammatory activities. However,
its poor water solubility limits its further development.
Objective: This study aims to prepare BA-loaded Solutol HS15 (HS15-BA) micelles, evaluate the bioavailability,
and explore protective effects on carbon tetrachloride (CCl4) induced acute liver injury.
Methods: The thin-film dispersion method was used to prepare HS15-BA micelles. The physicochemical,
in vitro release, pharmacokinetics, and hepatoprotective effects of HS15-BA micelles were studied.
Results: The optimal formulation showed a spherical shape by characterization of the transmission electron
microscope (TEM) with an average small size (12.50 nm). The pharmacokinetic results illustrated
that HS15-BA increased the oral bioavailability of BA. The in vivo results showed that HS15-BA micelles
significantly inhibited the activity of the CCl4-induced liver injury marker enzymes aspartate
transaminase (AST) and alanine transaminase (ALT). Also, CCl4 induced oxidative damage to liver
tissue, leading to increased L-glutathione (GSH) and superoxide dismutase (SOD) activity and decreased
malondialdehyde (MDA) activity, while HS15-BA significantly reversed the above changes.
Moreover, BA also had a hepatoprotective effect through anti-inflammatory activity; the results of ELISA
and RT-PCR revealed that HS15-BA pretreatment significantly inhibited the increase in the expression
of inflammatory factors induced by CCl4.
Conclusion: In summary, our study confirmed that HS15-BA micelles enhanced the bioavailability of
BA, and showed hepatoprotective effects through antioxidant and anti-inflammatory activities. HS15
could be considered a promising oral delivery carrier in treating liver disease.