國家衛生研究院 NHRI:Item 3990099045/7027
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/7027


    Title: Cosynthesis of cargo-loaded hydroxyapatite/alginate core-shell nanoparticles (HAP@Alg) as pH-responsive nanovehicles by a pre-gel method
    Authors: Liang, YH;Liu, CH;Liao, SH;Lin, YY;Tang, HW;Liu, SY;Lai, IR;Wu, KCW
    Contributors: Division of Medical Engineering Research
    Abstract: A new core-shell nanostructure consisting of inorganic hydroxyapatite (HAP) nanoparticles as the core and organic alginate as the shell (denoted as HAP@Alg) was successfully synthesized by a pre-gel method and applied to pH-responsive drug delivery systems (DDS). HAP@Alg nanoparticles have the advantages of hydroxyapatite and alginate, where hydroxyapatite provides pH-responsive degradability, and alginate provides excellent biocompatibility and COOH functionality. Through the subsequent addition of CaCl2 and phosphate solutions to the alginate solution, HAP@Alg nanoparticles with controllable particle sizes (ranging from 160 to 650 nm) were obtained, and their core-shell structure was confirmed through transmission electron microscopy (TEM) observation. Rhodamine 6G (R6G), a positively charged dye, was selected as a model drug for pH-sensitive DDS. R6G was encapsulated in the HAP/Alg nanoparticles upon synthesis, and its loading efficiency could reach up to approximately 63.0%. The in vitro release behavior of the loaded R6G at different pH values was systematically studied, and the results indicated that more R6G molecules were released at lower pH conditions. For example, after releasing for 8 h, the release amount of R6G at pH 2.0 was 2.53-fold the amount at pH 7.4. We attributed this pH-sensitive release behavior to the dissolution of the HAP core in acidic conditions. The results of the MTT assay and confocal laser scanning microscopy indicated that the HAP@Alg were successfully uptaken by liver cancer cells (HepG2) without apparent cytotoxicity. The synthesized HAP@Alg nanoparticles show great potential as drug nanovehicles with high biocompatibility, enhanced drug loading, and pH-responsive features for future intracellular DDS.
    Date: 2012-11-15
    Relation: ACS Applied Materials and Interfaces. 2012 Nov 15;4(12):6720-6727.
    Link to: http://dx.doi.org/10.1021/am301895u
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1944-8244&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000313149800044
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84871641392
    Appears in Collections:[Chia-Wen Wu] Periodical Articles

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