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Letters in Drug Design & Discovery


ISSN (Print): 1570-1808
ISSN (Online): 1875-628X

Enhanced Oral Bioavailability of Oleanolic Acid in Rats with Phospholipid Complex

Author(s): Feng Cao, Yahan Gao, Zhi Yin, Qineng Ping

Volume 9 , Issue 5 , 2012

Page: [505 - 512] Pages: 8

DOI: 10.2174/157018012800389340

Price: $65


To improve the bioavailability of oleanolic acid (OA), OA-phospholipid complex (OA-PLC) was prepared and evaluated with solubility, differential scanning calorimetry, x-ray powder diffractometry, IR spectroscopy, dissolution study and pharmacokinetic characteristics in rats. Concentrations of OA after oral administration of OA-PLC and OA aqueous suspension in rats were determined by high-performance liquid chromatography/mass spectrometry /mass spectrometry. Solubility of OA-PLC in water and in n-octanol was effectively enhanced by 300 times and 1.2 times, respectively. Spectra of DSC, xRD and IR showed that OA-PLC was formed. Cmax of rats treated with OA and OA-PLC is 0.47 and 1.18 μg/mL, respectively. AUC0→24h and AUC0→∞ values in rats of group OA-PLC were increased significantly (p < 0.01) by 2.06 and 2.16 times compared with those of group OA, respectively. This study indicates the superiority of OA-PLC over OA, in terms of enhanced water and lipid solubility and improved bioavailability in rats.

Keywords: Fructus forsythiae, anti-nociceptive, Radix ginseng, Biopharmaceutics Classification System, Fructus ligustrilucidi, solid dispersion, drug-phospholipid complex, Caco-2 cell monolayers, bergenin, curcumin

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