Thermo-sensitivity and triggered drug release of polysaccharide nanogels derived from pullulan-g-poly(l-lactide) copolymers |
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Authors: | Seogjin SeoChung-Sung Lee Young-Seok JungKun Na |
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Institution: | Department of Biotechnology, The Catholic University of Korea, Bucheon 420-743, Republic of Korea |
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Abstract: | Thermo-responsive nanogels from poly(l-lactide)-g-pullulan (PLP1 and 2) copolymers with different lactide contents were investigated as an anticancer drug delivery carrier. The phase transition temperature of PLP 1 with lower lactide content in distilled water showed around 35 °C. Upon adding 0.15 M NaCl to PLP 1, a significant difference in the transmittance was observed when comparing the non-additive salt condition. The total amount of released doxorubicin (DOX) from the DOX-loaded PLP nanogels increased with increasing temperature for 50 h. A noticeable difference in the initial release by PLP 1 was observed between 37 and 42 °C. In the 50% inhibitory concentration (IC50) analysis, the IC50 values of DOX released from PLP 1 were approximately 5.9 and 9.3 μg/mL at 37 and 42 °C, respectively. The results suggest that self-assembled PLP nanogels, by means of a triggering temperature, can be used as a long-term drug delivery system in cancer treatments. |
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Keywords: | Thermo-responsive Nanogels Pullulan Phase transition temperature Doxorubicin |
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