Luteolin-loaded solid lipid nanoparticles synthesis, characterization, & improvement of bioavailability, pharmacokinetics in vitro and vivo studies
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Abstract
Luteolin (LU, 5,7,3′,4′-tetrahydroxyflavone) most active compound in Chinese herbal flavones has been acting as a antimicrobial, anti-inflammatory, anti-cancer, and antimutagen. However, its poor bioavailability, hydrophobicity, and pharmacokinetics restrict clinical application. Here in this study, LU-loaded solid lipid nanoparticles have been prepared by hot-microemulsion ultrasonic technique to improve the bioavailability & pharmacokinetics of compound. LU-loaded solid lipid nanoparticle size was confirmed by particle size analyzer with range from 47 to 118 nm, having zepta potential −9.2 mV and polydisperse index 0.247, respectively. Round-shaped SLNPs were obtained by using transmission electron microscope, and encapsulation efficiency 74.80 % was calculated by using HPLC. Both in vitro and vivo studies, LC–MS/MS technique was used for quantification of Luteolin in rat. The T max value of drug with LU–SLNs after the administration was Ten times shorter than pure Luteolin suspension administration. C max value of drug after the administration of LU–SLNs was five times higher than obtained with native drug suspension. Luteolin with SLNs has increased the half-life approximately up to 2 h. Distribution and clearance of drug with SLNs were significantly decreased by 2.16–10.57 fold, respectively. In the end, the relative bioavailability of SLNs has improved about 4.89 compared to Luteolin with SLNs. From this study, it can be concluded that LU–SLNs have not only great potential for improving solubility but also increased the drug concentration in plasma. Furthermore, use of LC–MS/MS for quantification of LU–SLNs in rat plasma is reliable and of therapeutic usefulness, especially for neurodegenerative and cancerous disorders in humans.
Keywords
SLNs LC–MS/MS Bioavailability Pharmacokinetics Drug delivery NanomedicineAbbreviations
- TEM
Transmission electron microscopy
- SLNs
Solid lipid nanoparticles
- GMS
Glycero monostearate
- DLS
Dynamic light scattering
- EE
Entrapment efficiency
Notes
Acknowledgements
The authors wish to express their thanks for financial support from the National Natural Science Foundation of China (No. 11079054), material and facilitative support from Beijing BIT&GY Pharmaceutical R&D Co. Ltd., P.R. China.
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