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• W2040656200 abstract "In vitro evaluation of 5-aminolevulinic acid (ALA) loaded PLGA nanoparticles Lei Shi,1 Xiuli Wang,1 Feng Zhao,2 Hansen Luan,2 Qingfeng Tu,1 Zheng Huang,3 Hao Wang,2 Hongwei Wang1,41Shanghai Skin Disease Hospital, Shanghai, People&#39;s Republic of China; 2National Pharmaceutical Engineering Research Center, China State Institute of Pharmaceutical Industry, Shanghai, People&#39;s Republic of China; 3Ministry of Education (MOE) Key Laboratory of OptoElectronic Science and Technology for Medicine, Fujian Normal University, Fuzhou, People&#39;s Republic of China; 4Huadong Hospital, Fudan University, Shanghai, People&#39;s Republic of ChinaBackground: 5-Aminolevulinic acid (ALA) is a prodrug for topical photodynamic therapy. The effectiveness of topical ALA can be limited by its bioavailability. The aim of this study was to develop a novel ALA delivery approach using poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs).Methods: A modified double emulsion solvent evaporation method was used to prepare ALA loaded PLGA NPs (ALA PLGA NPs). The characteristics, uptake, protoporphyrin IX fluorescence kinetics, and cytotoxicity of ALA PLGA NPs toward a human skin squamous cell carcinoma cell line were examined.Results: The mean particle size of spherical ALA PLGA NPs was 65.6 nm ± 26 nm with a polydispersity index of 0.62. The encapsulation efficiency was 65.8% ± 7.2% and ALA loading capacity was 0.62% ± 0.27%. When ALA was dispersed in PLGA NPs, it turned into an amorphous phase. ALA PLGA NPs could be taken up by squamous cell carcinoma cells and localized in the cytoplasm. The protoporphyrin IX fluorescence kinetics and 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide assay showed that ALA PLGA NPs were more effective than free ALA of the same concentration.Conclusion: PLGA NPs provide a promising ALA delivery strategy for topical ALA-photodynamic therapy of skin squamous cell carcinoma.Keywords: 5-Aminolevulinic acid (ALA), nanoparticles, poly(lactic-co-glycolic acid) (PLGA), skin squamous cell carcinoma, photodynamic therapy (PDT)" @default.
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• W2040656200 date "2013-07-01" @default.
• W2040656200 modified "2023-09-27" @default.
• W2040656200 title "In vitro evaluation of 5-aminolevulinic acid (ALA) loaded PLGA nanoparticles" @default.
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• W2040656200 doi "https://doi.org/10.2147/ijn.s45821" @default.
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