Journal
BIOMACROMOLECULES
Volume 17, Issue 1, Pages 20-31Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.biomac.5b01474
Keywords
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Funding
- Ministry of Science, ICT, and Future Planning [2012M3C1A1054502]
- Basic Science Research Program through National Research Foundation of Korea [2015R1D1A1A09057372]
- BK21 PLUS Program
- Korea Health Care Technology R&D project from Ministry for Health, Welfare, and Family Affairs [A091047]
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Smart delivery system of photosensitizer chlorin e6 (Ce6) has been developed for targeted photodynamic therapy (PDT). Simple self-assemblies of the mixtures comprising soybean lecithin derived phosphatidylcholine (PC), phosphatidylethanolamine-poly(L-histidine)(40) (PE-p-(His)(40)), and folic acid (FA) conjugated phosphatidylethanolamine-poly(N-isopropylacrylamide)(40) (PE-p(NIPAM)(40)-FA) in different ratios yield smart nanospheres characterized by (i) stable and uniform particle size (similar to 100 nm), (ii) positive surface charge, (iii) high hydrophobic drug (Ce6) loading efficiency up to 45%, (iv) covalently linked targeting moiety, (v) low cytotoxicity, and (vi) smartness showing p(His) block oriented pH and p(NIPAM) oriented temperature responsiveness. The Ce6-encapsulated vesicular nanospheres (Ce6@VNS) were used to confirm the efficiency of cellular uptake, intracellular distribution, and phototoxicity against KB tumor cells compared to free Ce6 at different temperature and pH conditions. The Ce6@VNS system showed significant photodynamic therapeutic efficiency on KB cells than free Ce6. A receptor-mediated inhibition study proved the site-specific delivery of Ce6 in targeted tumor cells.
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