Abstract
Curcumin in spite of being an effective chemotherapeutic agent against different type of cancer, suffer from the problem of low systemic bioavailability due to low aqueous solubility, extensive intestinal metabolism and first-pass metabolism when administered via the oral route. The aim of present investigation was to evaluate the potential of nano globules based nanoemulsion formulation for the solubility enhancement of curcumin. The nano globules based formulation was developed using Labrafac Lipophile WL 1349, Unitop FFT 40, PEG 400 and distilled water as an oil, surfactant, co-surfactant and aqueous phase respectively using aqueous titration method. Furthermore, different formulations were subjected to physical stability and consequently evaluated for ex vivo permeation using small intestine. The optimized formulation had small average globule diameter of 58 nm with zeta potential of -32 mv which indicated long-term dispersion stability. The globules were spherical in shape as observed by Transmission electron microscopy. During ex vivo study, the release of curcumin from nanoemulsion was 96.21% and 98.1% in 6 h and 12 h respectively whereas CU suspension was release up to 28.2% at the end of 12 h. This indicated the enhancement of solubility of curcumin in aqueous solution which is the rate limiting step in the absorption of curcumin in the intestine.
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