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Study of a novel disintegrable oleanolic acid-polyvinylpolypyrrolidone solid dispersion.
Weiqin Wang1, Changchang Cui1, Mengying Li1
1a Department of Pharmaceutics , State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , Jiangsu Province , PR China.
Drug Development and Industrial Pharmacy
|March 10, 2017
Summary
Polyvinylpolypyrrolidone (PVPP) enhances oleanolic acid (OLA) solubility and stability through solid dispersions. This formulation significantly improves OLA
Area of Science:
- Pharmaceutical Sciences
- Materials Science
Background:
- Oleanolic acid (OLA) exhibits poor aqueous solubility, limiting its therapeutic applications.
- Solid dispersions (SDs) offer a strategy to enhance the bioavailability of poorly soluble drugs.
Purpose of the Study:
- To develop and characterize novel solid dispersions of oleanolic acid-polyvinylpolypyrrolidone (OLA-PVPP SDs).
- To evaluate the in vitro and in vivo performance of OLA-PVPP SDs for improved drug delivery.
Main Methods:
- Solid dispersions were prepared using oleanolic acid and polyvinylpolypyrrolidone.
- Characterization involved DSC, XRD, IR, and SEM analyses.
- In vitro dissolution and in vivo pharmacokinetic studies were conducted.
Main Results:
- OLA-PVPP SDs demonstrated an amorphous state with improved fluidity, stability, and moisture absorption.
- In vitro dissolution showed a 10-15 fold increase in OLA release compared to free OLA.
- In vivo studies revealed significantly shorter Tmax and higher Cmax for OLA-PVPP SDs.
Conclusions:
- PVPP is a promising carrier for oleanolic acid solid dispersions.
- The developed OLA-PVPP SDs offer an industrially feasible approach for enhancing OLA bioavailability.
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