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  • Title: Nanocomplexation between curcumin and soy protein isolate: influence on curcumin stability/bioaccessibility and in vitro protein digestibility.
    Author: Chen FP, Li BS, Tang CH.
    Journal: J Agric Food Chem; 2015 Apr 08; 63(13):3559-69. PubMed ID: 25779681.
    Abstract:
    The complexation of nanoparticles in unheated and heated (at 75-95°) soy protein isolate (SPI) with curcumin and the effects on curcumin stability/bioaccessibility and in vitro protein digestibility were investigated. The nanoparticles did not display noticeable changes in size and morphology upon nanocomplexation with curcumin, except their surface hydrophobicity. The encapsulation efficiency of curcumin progressively decreased with increasing initial curcumin concentration in the dispersion, while the load amount linearly increased. The solubility of curcumin in water was enhanced by the complexation above 98000-fold (vs free curcumin in water). The formation of the nanocomplexes considerably improved the storage stability of curcumin. In vitro simulated digestion experiments indicated that the complexation also improved the bioaccessibility of curcumin; the bioaccessibility was greatly impaired by hydrolysis-induced protein aggregation. Addtionally, the nanocomplexation significantly improved the in vitro protein digestibility of both unheated and heated SPI.
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