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• W2772035539 abstract "Drug formulations based on lipids can enable a significantly better delivery of a pharmaceutically active substance and thus enhance their bioavailability. However, natural fats and oils usually have properties, which do not allow their direct use for drug delivery. Therefore, we have modified palm kernel oil (PKO) and shea butter (SB) via lipase‐catalyzed transesterification using either glycerol – to create a diglyceride‐enriched lipid – or using hexanoic acid via acidolysis – to alter their fatty acid composition – and hence to improve drug solubility of Celecoxib serving as model compound. The most suitable enzyme was immobilized Thermomyces lanuginosus lipase (Novozyme TL IM). The solubility of Celecoxib as determined in SB, pharmaceutical grade SB, glycerol‐modified SB, hexanoic acid‐modified SB, PKO, glycerol‐modified PKO, and hexanoic acid‐modified PKO. Incorporation of one or two equivalents of hexanoic acid enabled higher Celecoxib solubilization than the diglyceride rich oil. Although structured SB and PKO (15.8 ± 0.4 mg mL −1 ) do not differ significantly ( p < 0.05) as per the amount of Celecoxib dissolved, the use of the modified oils enhanced Celecoxib solubility in SB (15.5 ± 1.3 mg mL −1 ) in comparison to shea butter (7.9 ± 0.5 mg mL −1 ). The lipase‐catalyzed modification also improved the miscibility of the oils with surfactants such as Tween 20 and resulted in reduced droplet sizes (<70 nm at oil/surfactant ratios of 1:2 and 1:1) and reduced polydispersity index values of the resulting emulsions. Practical Application : The structured triglycerides synthesized in this work on the basis of natural shea butter oils could function as suppository bases and oil phase in oral and parenteral lipid‐based formulations for improving the solubility and absorption of poorly soluble drugs. As various lipases with distinct selectivity are available for the enzymatic synthesis of structured triglycerides and useful for this purpose, further tailor‐designed formations should be accessible. With the aim of developing novel lipid drug delivery matrices palm kernel oil (PKO) and shea butter (SB) were modified via lipase‐catalyzed transesterification to alter their fatty acid composition and hence to improve drug solubility of the model compound Celecoxib. Incorporation of one or two equivalents of hexanoic acid enabled better Celecoxib solubilization than the diglyceride‐rich oil. Overall, the successful modification process yielded structured lipids with promising miscibility with selected surfactants and potential enhancement of Celecoxib solubility and thus represents a promising approach for the development of novel safe and effective lipid‐based delivery systems." @default.
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• W2772035539 date "2018-02-27" @default.
• W2772035539 modified "2023-10-03" @default.
• W2772035539 title "Enzymatically Modified Shea Butter and Palm Kernel Oil as Potential Lipid Drug Delivery Matrices" @default.
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• W2772035539 doi "https://doi.org/10.1002/ejlt.201700332" @default.
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