Investigation of endocytosis and cytotoxicity of poly-d, l-lactide-poly(ethylene glycol) micro/nano-particles in osteoblast cells
Weijia Wang, Shaobing Zhou, Laiyang Guo, Wei Zhi, Xiaohong Li, Jie WengSchool of Materials Science and Engineering, Key Laboratory of Advanced Technologies of Material, Ministry of Education, Southwest Jiaotong University, Chengdou, Sichuan, People’s Republic of ChinaAbstract: Biodegra...
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| Format: | Article |
| Language: | English |
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Dove Medical Press
2010-07-01
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| Series: | International Journal of Nanomedicine |
| Online Access: | http://www.dovepress.com/investigation-of-endocytosis-and-cytotoxicity-of-poly-d-l-lactide-poly-a4947 |
| _version_ | 1818997933184385024 |
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| author | Weijia Wang Shaobing Zhou Laiyang Guo et al |
| author_facet | Weijia Wang Shaobing Zhou Laiyang Guo et al |
| author_sort | Weijia Wang |
| collection | DOAJ |
| description | Weijia Wang, Shaobing Zhou, Laiyang Guo, Wei Zhi, Xiaohong Li, Jie WengSchool of Materials Science and Engineering, Key Laboratory of Advanced Technologies of Material, Ministry of Education, Southwest Jiaotong University, Chengdou, Sichuan, People’s Republic of ChinaAbstract: Biodegradable polymer particles present a promising approach for intracellular delivery of drugs, proteins, and nucleic acids. Poly-d,l-lactide-poly(ethylene glycol) (PELA) copolymers with different weight ratios of polyethylene glycol (PEG) were used as drug carriers in the present study. PELA particles entrapped with fluorescein isothiocyanate (FITC) as a fluorescent marker were formulated using a double emulsion-solvent evaporation technique. The size and morphology of the particles were observed with scanning electron microscope (SEM), atomic force microscope (AFM), and laser diffraction particle size analyzer (LDPSA). The purpose in the present work was to investigate the cytotoxicity and the process of endocytosis of PELA particles with different contents of PEG and variable particle size using rat osteoblasts (OBs). The cytotoxicity of the particles was investigated using 5-dimethylthiazol-2-yl-2,5-diphenyltetrazolium bromide (MTT) assay and flow cytometry. Results indicate that as the content of PEG in the polymer increased, so did cell survival. Endocytosis was observed through a light microscope and a fluorescence microscope; intracellular uptake and retention were determined quantitatively using fluorescence spectrophotometer (FSP). The results showed that as PEG content in PELA copolymer increased, there was a reduction in endocytosis of nanoparticles in osteoblasts.Keywords: nanoparticles, endocytosis, cytotoxicity, intracellular traf?cking, drug delivery |
| first_indexed | 2024-12-20T21:53:30Z |
| format | Article |
| id | doaj.art-b599d6354bc2474da56f2ff17e519217 |
| institution | Directory Open Access Journal |
| issn | 1176-9114 1178-2013 |
| language | English |
| last_indexed | 2024-12-20T21:53:30Z |
| publishDate | 2010-07-01 |
| publisher | Dove Medical Press |
| record_format | Article |
| series | International Journal of Nanomedicine |
| spelling | doaj.art-b599d6354bc2474da56f2ff17e5192172022-12-21T19:25:30ZengDove Medical PressInternational Journal of Nanomedicine1176-91141178-20132010-07-012010default557566Investigation of endocytosis and cytotoxicity of poly-d, l-lactide-poly(ethylene glycol) micro/nano-particles in osteoblast cellsWeijia WangShaobing ZhouLaiyang Guoet alWeijia Wang, Shaobing Zhou, Laiyang Guo, Wei Zhi, Xiaohong Li, Jie WengSchool of Materials Science and Engineering, Key Laboratory of Advanced Technologies of Material, Ministry of Education, Southwest Jiaotong University, Chengdou, Sichuan, People’s Republic of ChinaAbstract: Biodegradable polymer particles present a promising approach for intracellular delivery of drugs, proteins, and nucleic acids. Poly-d,l-lactide-poly(ethylene glycol) (PELA) copolymers with different weight ratios of polyethylene glycol (PEG) were used as drug carriers in the present study. PELA particles entrapped with fluorescein isothiocyanate (FITC) as a fluorescent marker were formulated using a double emulsion-solvent evaporation technique. The size and morphology of the particles were observed with scanning electron microscope (SEM), atomic force microscope (AFM), and laser diffraction particle size analyzer (LDPSA). The purpose in the present work was to investigate the cytotoxicity and the process of endocytosis of PELA particles with different contents of PEG and variable particle size using rat osteoblasts (OBs). The cytotoxicity of the particles was investigated using 5-dimethylthiazol-2-yl-2,5-diphenyltetrazolium bromide (MTT) assay and flow cytometry. Results indicate that as the content of PEG in the polymer increased, so did cell survival. Endocytosis was observed through a light microscope and a fluorescence microscope; intracellular uptake and retention were determined quantitatively using fluorescence spectrophotometer (FSP). The results showed that as PEG content in PELA copolymer increased, there was a reduction in endocytosis of nanoparticles in osteoblasts.Keywords: nanoparticles, endocytosis, cytotoxicity, intracellular traf?cking, drug deliveryhttp://www.dovepress.com/investigation-of-endocytosis-and-cytotoxicity-of-poly-d-l-lactide-poly-a4947 |
| spellingShingle | Weijia Wang Shaobing Zhou Laiyang Guo et al Investigation of endocytosis and cytotoxicity of poly-d, l-lactide-poly(ethylene glycol) micro/nano-particles in osteoblast cells International Journal of Nanomedicine |
| title | Investigation of endocytosis and cytotoxicity of poly-d, l-lactide-poly(ethylene glycol) micro/nano-particles in osteoblast cells |
| title_full | Investigation of endocytosis and cytotoxicity of poly-d, l-lactide-poly(ethylene glycol) micro/nano-particles in osteoblast cells |
| title_fullStr | Investigation of endocytosis and cytotoxicity of poly-d, l-lactide-poly(ethylene glycol) micro/nano-particles in osteoblast cells |
| title_full_unstemmed | Investigation of endocytosis and cytotoxicity of poly-d, l-lactide-poly(ethylene glycol) micro/nano-particles in osteoblast cells |
| title_short | Investigation of endocytosis and cytotoxicity of poly-d, l-lactide-poly(ethylene glycol) micro/nano-particles in osteoblast cells |
| title_sort | investigation of endocytosis and cytotoxicity of poly d l lactide poly ethylene glycol micro nano particles in osteoblast cells |
| url | http://www.dovepress.com/investigation-of-endocytosis-and-cytotoxicity-of-poly-d-l-lactide-poly-a4947 |
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