Abstract
Kaempferia galanga volatile oil (KVO), the main effective component of the medicinal plant Kaempferia galanga L., possesses a variety of pharmacological activities such as anti-inflammatory, antioxidant, and anti-angiogenic activities and has therapeutic potential for gastric ulcer (GU). However, poor solubility as well as instability limits the clinical application of KVO. In this study, K. galanga volatile oil self-microemulsion solids (KVO-SSMEDDS) were prepared to improve its bioavailability and stability, and the therapeutic effects were evaluated in a rat model with GU. The ratio of oil phase, emulsifier, and co-emulsifier in the KVO-SMEDDS prescription were optimized by plotting the pseudo-ternary phase diagram with the star point design-response surface method. Based on the optimal prescription, self-microemulsifying drug delivery system (SMEDDS) was prepared as solid particles (S-SMEDDS). The prepared KVO-SSMEDDS had a rounded and non-adhesive appearance, formed an O/W emulsion after dissolution in water, and had a uniform particle size distribution with good stability and solubility. It was administered to GU model animals, and the results showed that a certain dose of KVO-SSMEDDS solution could increase the content of gastric mucosal protective factors PGE2, TGF-α, and EGF in gastric tissues and serum, and the expression of inflammatory factors IL-8 and TNF-α was downregulated. Meanwhile, the expression of the NF-κB/COX-2 pathway proteins was inhibited. In conclusion, the prepared KVO-SSMEDDS has good dispersion, solubility, and stability and has a therapeutic effect on rats with GU.
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13 December 2023
A Correction to this paper has been published: https://doi.org/10.1208/s12249-023-02719-0
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Acknowledgements
The authors are thankful to the Guangdong Pharmaceutical University Ethics Committee for their kind guidance in the animal experiments, and the School of Chinese Material Medica of Guangdong Pharmaceutical University for providing the technical platform.
Funding
This project was funded by the Guangdong Natural Science Project (No. 51348190) and National TCM Backbone Innovative Talent Training Program (State Administration of Traditional Chinese Medicine) (National TCM Human Education Letter (2019) No. 128).
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Conceived and designed the experiments: DL, RL, and JS.
Performed the experiments: DL, RL, ZZ, BY, and CQ.
Contributed analytic tools: FM and JS.
Performed data analysis: DL, RL, ZZ, BY, CQ, and JS.
Wrote or contributed to the writing of the manuscript: DL, RL, ZZ, BY, CQ, FM, and JS.
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Liu, D., Liu, R., Zhuang, Z. et al. Preparation of Self-microemulsion Solids of Kaempferia galanga (L.) Volatile Oil and Its Effect on Rats with Gastric Ulcer. AAPS PharmSciTech 24, 243 (2023). https://doi.org/10.1208/s12249-023-02693-7
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DOI: https://doi.org/10.1208/s12249-023-02693-7