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O'Callaghan JA, Lee D, Hammer DA. Asymmetry-Enhanced Motion of Urease-Powered Micromotors from Double Emulsion-Templated Microcapsules. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37902731 DOI: 10.1021/acsami.3c10222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
Autonomous motion of enzyme-powered motors has important implications for drug delivery, cell-cell communication, and protocell engineering. Although many of these systems are inspired by the motion of biological cells, most of them lack key structural features, like micrometer-sized boundaries and aqueous compartments, and rely on bubble propulsion to generation motion. In this study, we use droplet microfluidics to generate large populations of cell-sized microcapsules with poly(lactic-co-glycolic acid) shells and functionalize their surfaces with the enzyme urease to drive their motion. We adjust the number of surface functional groups for urease conjugation by preparing microcapsules with two different surfactants, poly(vinyl alcohol) (PVA) and poly(ethylene-alt-maleic anhydride) (PEMA). We also tune the surface roughness of the microcapsules by varying the concentration of silica nanoparticles in the droplet middle phase. We find that PEMA plays a crucial role in increasing the grafting density of urease on the surface of smooth microcapsules, leading to active motion in the presence of urea. In addition, rough microcapsules prepared with PEMA and loaded with comparable amounts of urease move up to three times faster than their smooth counterparts, which we believe is due to an asymmetric distribution of urease on the surface, giving rise to a preferred direction of motion. Taken together, these results provide new insights into the role that various stabilizing agents play in the induction of motion by enzymatic motors prepared from microfluidics, which is a potentially powerful tool for future preparation of motile protocells in biomedicine.
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Affiliation(s)
- Jessica Ann O'Callaghan
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Daeyeon Lee
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Daniel A Hammer
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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2
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Zhang Q, Bao J, Duan T, Hu M, He Y, Wang J, Hu R, Tang J. Nanomicelle-Microsphere Composite as a Drug Carrier to Improve Lung-Targeting Specificity for Lung Cancer. Pharmaceutics 2022; 14:pharmaceutics14030510. [PMID: 35335884 PMCID: PMC8955237 DOI: 10.3390/pharmaceutics14030510] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/21/2022] [Accepted: 02/23/2022] [Indexed: 12/10/2022] Open
Abstract
Lung cancer is the second-most common cancer and has the highest mortality among all cancer types. Nanoparticle (NP) drug delivery systems have been used to improve the therapeutic effectiveness of lung cancer, but rapid clearance and poor targeting limit their clinical utility. Here, we developed a nanomicelle-microsphere composite, in which doxorubicin (DOX) was loaded with spermine (Spm) modified poly (ethylene glycol)-poly(ε-caprolactone) (PEG-PCL) micelles, and then the nanomicelles were noncovalently adsorbed on the surface of poly (lactic-co-glycolic acid) (PLGA) microspheres. The attachment was confirmed by scanning electron microscopy and confocal microscopy. In vitro cell experiments, MTT assays and intracellular uptake assays were used to demonstrate the cytotoxicity and the cellular uptake of micelles in A549 cells. In vivo biodistribution studies were conducted, an orthotopic lung cancer implantation model based on C57BL/6 mice was established, and then real-time fluorescence imaging analysis was used to study the targeted efficacy of the complex. A nanomicelle-microsphere composite was successively constructed. Moreover, Spm-modified micelles significantly enhanced cytotoxicity and displayed more efficient cellular uptake. Notably, an orthotopic lung cancer implantation model based on C57BL/6 mice was also successively established, and in vivo biodistribution studies confirmed that the complex greatly improved the distribution of DOX in the lungs and displayed notable tumor targeting. These results suggested that the nanomicelle-microsphere composite has potential application prospects in the targeted treatment of lung cancer.
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Affiliation(s)
- Qianqian Zhang
- School of Pharmacy, Anhui Medical University, Hefei 230032, China; (Q.Z.); (J.B.); (T.D.); (M.H.); (Y.H.); (J.W.)
| | - Jianwei Bao
- School of Pharmacy, Anhui Medical University, Hefei 230032, China; (Q.Z.); (J.B.); (T.D.); (M.H.); (Y.H.); (J.W.)
| | - Tijie Duan
- School of Pharmacy, Anhui Medical University, Hefei 230032, China; (Q.Z.); (J.B.); (T.D.); (M.H.); (Y.H.); (J.W.)
| | - Minxing Hu
- School of Pharmacy, Anhui Medical University, Hefei 230032, China; (Q.Z.); (J.B.); (T.D.); (M.H.); (Y.H.); (J.W.)
| | - Yuting He
- School of Pharmacy, Anhui Medical University, Hefei 230032, China; (Q.Z.); (J.B.); (T.D.); (M.H.); (Y.H.); (J.W.)
| | - Junwei Wang
- School of Pharmacy, Anhui Medical University, Hefei 230032, China; (Q.Z.); (J.B.); (T.D.); (M.H.); (Y.H.); (J.W.)
| | - Rongfeng Hu
- Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, Key Laboratory of Xin’an Medicine, the Ministry of Education, Anhui Province Key Laboratory of Chinese Medicinal Formula, Plant Active Peptide Function Food Innovative Manufacturing Industry Innovation Team, Anhui University of Chinese Medicine, Hefei 230038, China
- Correspondence: (R.H.); (J.T.); Tel.: +86-55165161176 (J.T.)
| | - Jihui Tang
- School of Pharmacy, Anhui Medical University, Hefei 230032, China; (Q.Z.); (J.B.); (T.D.); (M.H.); (Y.H.); (J.W.)
- Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, Key Laboratory of Xin’an Medicine, the Ministry of Education, Anhui Province Key Laboratory of Chinese Medicinal Formula, Plant Active Peptide Function Food Innovative Manufacturing Industry Innovation Team, Anhui University of Chinese Medicine, Hefei 230038, China
- Correspondence: (R.H.); (J.T.); Tel.: +86-55165161176 (J.T.)
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3
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Nishiguchi A, Taguchi T. Development of an immunosuppressive camouflage-coating platform with nanocellulose and cell membrane vesicles. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 31:1912-1924. [PMID: 32538290 DOI: 10.1080/09205063.2020.1783060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Biomedical devices trigger immune responses when implanted in the body, as they are treated as foreign bodies. To avoid inflammatory responses and enhance the biocompatibility of biomedical devices, advanced coating technology that can modulate immune responses is essential. As a part of the immune response in the body, autologous cells evade attack from macrophages using CD47 ligands that function as markers for self. Inspired by this self-recognition system, we developed a camouflage coating for biomaterial surfaces using cell membrane vesicles that could suppress inflammatory responses. In this study, we used monocyte-derived cell membrane vesicles expressing CD47 for coating nanocellulose-coated substrates. Our data showed that presentation of CD47 to macrophages elicited negative signal transduction for immunosuppression. Further, for coating, we used cell membrane vesicles and plant-derived nanofibers. We observed that the supporting layer of cellulose nanofibers physically fixed cell membrane vesicles and provided hydrophilic surfaces to the polystyrene substrate. Based on CD47 signaling, cell membrane vesicle coating suppressed the inflammatory responses of stimulated macrophages. Camouflaging biomaterial surfaces with cell-derived components might serve as an advanced coating platform to suppress inflammatory responses and enhance tissue integrity for biomedical devices after implantation.
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Affiliation(s)
- Akihiro Nishiguchi
- Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Tetsushi Taguchi
- Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
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4
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Hybrid Nanoparticles of Poly (Methyl Methacrylate) and Antimicrobial Quaternary Ammonium Surfactants. Pharmaceutics 2020; 12:pharmaceutics12040340. [PMID: 32290276 PMCID: PMC7238100 DOI: 10.3390/pharmaceutics12040340] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/05/2020] [Accepted: 04/08/2020] [Indexed: 12/18/2022] Open
Abstract
Quaternary ammonium surfactants (QACs) are microbicides, whereas poly (acrylates) are biocompatible polymers. Here, the physical and antimicrobial properties of two QACs, cetyl trimethyl ammonium bromide (CTAB) or dioctadecyl dimethyl ammonium bromide (DODAB) in poly (methyl methacrylate) (PMMA) nanoparticles (NPs) are compared to those of QACs alone. Methyl methacrylate (MMA) polymerization using DODAB or CTAB as emulsifiers and initiator azobisisobutyronitrile (AIBN) yielded cationic, nanometric, homodisperse, and stable NPs. NPs’ physical and antimicrobial properties were assessed from dynamic light scattering (DLS), scanning electron microscopy, and viability curves of Escherichia coli, Staphylococcus aureus, or Candida albicans determined as log(colony-forming unities counting) over a range of [QACs]. NPs were spherical and homodisperse but activity for free QACs was higher than those for QACs in NPs. Inhibition halos against bacteria and yeast were observed only for free or incorporated CTAB in NPs because PMMA/CTAB NPs controlled the CTAB release. DODAB displayed fungicidal activity against C. albicans since DODAB bilayer disks could penetrate the outer glycoproteins fungus layer. The physical properties and stability of the cationic NPs highlighted their potential to combine with other bioactive molecules for further applications in drug and vaccine delivery.
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Saito E, Kuo R, Pearson RM, Gohel N, Cheung B, King NJC, Miller SD, Shea LD. Designing drug-free biodegradable nanoparticles to modulate inflammatory monocytes and neutrophils for ameliorating inflammation. J Control Release 2019; 300:185-196. [PMID: 30822435 DOI: 10.1016/j.jconrel.2019.02.025] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/14/2019] [Accepted: 02/19/2019] [Indexed: 12/12/2022]
Abstract
Inflammation associated with autoimmune diseases and chronic injury is an initiating event that leads to tissue degeneration and dysfunction. Inflammatory monocytes and neutrophils systemically circulate and enter inflamed tissue, and pharmaceutical based targeting of these cells has not substantially improved outcomes and has had side effects. Herein, we investigated the design of drug-free biodegradable nanoparticles, notably without any active pharmaceutical ingredient or targeting ligand, that target circulating inflammatory monocytes and neutrophils in the vasculature to inhibit them from migrating into inflamed tissue. Nanoparticles were formed from 50:50 poly(DL-lactide-co-glycolide) (PLG) with two molecular weights (Low, High) and poly(DL-lactide) (PLA) (termed PLG-L, PLG-H, and PDLA, respectively) and were analyzed for their association with monocytes and neutrophils and their impact on disease course along with immune cell trafficking. For particles injected intravenously for 6 consecutive days to mice with experimental autoimmune encephalomyelitis (EAE), PLG-H particles had significantly lower EAE clinical scores than PBS control, while PLG-L and PDLA particles had modest or negligible effect on EAE onset. In vivo and in vitro data suggests that PLG-H particles had high association with immune cells, with preferential association with blood neutrophils relative to other particles. PLG-H particles restrained immune cells from the central nervous system (CNS), with increased accumulation in the spleen, which was not observed for mice receiving PDLA or control treatments. These results demonstrate that the particle composition influences the association with inflammatory monocytes and neutrophils in the vasculature, with the potential to redirect trafficking and ameliorate inflammation.
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Affiliation(s)
- Eiji Saito
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Robert Kuo
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Ryan M Pearson
- Department of Pharmaceutical Sciences, University of Maryland, Baltimore, MD 21201, USA
| | - Nishant Gohel
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Brandon Cheung
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Nicholas J C King
- The Discipline of Pathology, School of Medical Science, Bosch Institute, Sydney Medical School, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Stephen D Miller
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Chemistry of Life Processes Institute (CLP), Northwestern University, Evanston, IL 60208, USA; The Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, IL 60611, USA.
| | - Lonnie D Shea
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
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6
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Farahmandghavi F, Imani M, Hajiesmaeelian F. Silicone matrices loaded with levonorgestrel particles: Impact of the particle size on drug release. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2018.10.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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7
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Cao J, Choi JS, Oshi MA, Lee J, Hasan N, Kim J, Yoo JW. Development of PLGA micro- and nanorods with high capacity of surface ligand conjugation for enhanced targeted delivery. Asian J Pharm Sci 2019; 14:86-94. [PMID: 32104441 PMCID: PMC7032182 DOI: 10.1016/j.ajps.2018.08.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 08/22/2018] [Accepted: 08/30/2018] [Indexed: 12/12/2022] Open
Abstract
Particle shape has been recognized as one of the key properties of nanoparticles in biomedical applications including targeted drug delivery. Targeting ability of shape-engineered particles depends largely on targeting ligands conjugated on the particle surface. However, poor capacity for surface ligand conjugation remains a problem in anisotropic nanoparticles made with biodegradable polymers such as PLGA. In this study, we prepared anisotropic PLGA nanoparticles with abundant conjugatable surface functional groups by a film stretching-based fabrication method with poly (ethylene-alt-maleic acid) (PEMA). Scanning electron microscopy images showed that microrods and nanorods were successfully fabricated by the PEMA-based film stretching method. The presence of surface carboxylic acid groups was confirmed by confocal microscopy and zeta potential measurements. Using the improved film-stretching method, the amount of protein conjugated to the surface of nanorods was increased three-fold. Transferrin-conjugated, nanorods fabricated by the improved method exhibited higher binding and internalization than unmodified counterparts. Therefore, the PEMA-based film-stretching system presented in this study would be a promising fabrication method for non-spherical biodegradable polymeric micro- and nanoparticles with high capacity of surface modifications for enhanced targeted delivery.
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Affiliation(s)
- Jiafu Cao
- College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Jin-Seok Choi
- College of Pharmacy, Pusan National University, Busan 46241, South Korea
- Department of Medical Management, Chodang University, Muan-gun 58530, South Korea
| | - Murtada A. Oshi
- College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Juho Lee
- College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Nurhasni Hasan
- College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Jihyun Kim
- College of Pharmacy, Pusan National University, Busan 46241, South Korea
- College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, South Korea
| | - Jin-Wook Yoo
- College of Pharmacy, Pusan National University, Busan 46241, South Korea
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8
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Chen C, Cui Y, Mao X, Pan X, Wu J. Suppressing Cyclic Polymerization for Isoselective Synthesis of High-Molecular-Weight Linear Polylactide Catalyzed by Sodium/Potassium Sulfonamidate Complexes. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02271] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Changjuan Chen
- State Key Laboratory
of Applied Organic Chemistry, College of Chemistry and Chemical Engineering,
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization
of Gansu Province, Lanzhou University, Lanzhou 730000, People’s Republic of China
- College
of Chemistry and Pharmaceutical Engineering, Huanghuai University, Zhumadian 463000, People’s Republic of China
| | - Yaqin Cui
- State Key Laboratory
of Applied Organic Chemistry, College of Chemistry and Chemical Engineering,
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization
of Gansu Province, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xiaoyang Mao
- State Key Laboratory
of Applied Organic Chemistry, College of Chemistry and Chemical Engineering,
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization
of Gansu Province, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xiaobo Pan
- State Key Laboratory
of Applied Organic Chemistry, College of Chemistry and Chemical Engineering,
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization
of Gansu Province, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jincai Wu
- State Key Laboratory
of Applied Organic Chemistry, College of Chemistry and Chemical Engineering,
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization
of Gansu Province, Lanzhou University, Lanzhou 730000, People’s Republic of China
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9
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Lee SW, Lee HJ, Lee JW, Kim KH, Kang JH, Lee MH, Lee SC. Surface functionalization of microgrooved titanium with dual growth factor-releasing nanoparticles for synergistic osteogenic differentiation of human mesenchymal stem cells. Colloids Surf B Biointerfaces 2015; 135:565-574. [DOI: 10.1016/j.colsurfb.2015.08.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/06/2015] [Accepted: 08/11/2015] [Indexed: 11/30/2022]
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10
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Sun J, Zhu Y, Meng L, Wei W, Li Y, Liu X, Zheng Y. Controlled release and corrosion protection by self-assembled colloidal particles electrodeposited onto magnesium alloys. J Mater Chem B 2015; 3:1667-1676. [DOI: 10.1039/c4tb01683a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Self-assembled nanoparticles loaded with bioactive agents were electrodeposited to provide the magnesium alloy with controlled release and corrosion resistance properties.
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Affiliation(s)
- Jiadi Sun
- Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Ye Zhu
- Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Long Meng
- Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Wei Wei
- Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Yang Li
- Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Xiaoya Liu
- Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Yufeng Zheng
- State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering
- College of Engineering
- Peking University
- Beijing 100871
- People's Republic of China
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Choi GH, Lee HJ, Lee SC. Titanium-Adhesive Polymer Nanoparticles as a Surface-Releasing System of Dual Osteogenic Growth Factors. Macromol Biosci 2013; 14:496-507. [DOI: 10.1002/mabi.201300368] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 10/02/2013] [Indexed: 01/20/2023]
Affiliation(s)
- Gi Hyun Choi
- Department of Maxillofacial Biomedical Engineering; Institute of Oral Biology, School of Dentistry, Kyung Hee University; 1 Hoegi-dong, Dongdaemun-gu Seoul 130-701 Republic of Korea
| | - Hong Jae Lee
- Department of Maxillofacial Biomedical Engineering; Institute of Oral Biology, School of Dentistry, Kyung Hee University; 1 Hoegi-dong, Dongdaemun-gu Seoul 130-701 Republic of Korea
| | - Sang Cheon Lee
- Department of Maxillofacial Biomedical Engineering; Institute of Oral Biology, School of Dentistry, Kyung Hee University; 1 Hoegi-dong, Dongdaemun-gu Seoul 130-701 Republic of Korea
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12
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Nanostructured medical device coatings based on self-assembled poly(lactic-co-glycolic acid) nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:3018-24. [DOI: 10.1016/j.msec.2013.03.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 02/17/2013] [Accepted: 03/18/2013] [Indexed: 11/30/2022]
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13
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Lee HJ, Koo AN, Lee SW, Lee MH, Lee SC. Catechol-functionalized adhesive polymer nanoparticles for controlled local release of bone morphogenetic protein-2 from titanium surface. J Control Release 2013; 170:198-208. [PMID: 23727196 DOI: 10.1016/j.jconrel.2013.05.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 05/02/2013] [Accepted: 05/22/2013] [Indexed: 01/17/2023]
Abstract
We report on a novel surface functionalization approach to equip the titanium (Ti) surfaces with osteogenic properties. A key feature of the approach is the treatment of the Ti surfaces with Ti-adhesive nanoparticles that can stably load and controllably release bone morphogenetic protein-2 (BMP-2). Ti-adhesive nanoparticles were prepared by self-assembly of a catechol-functionalized poly(amino acid) diblock copolymer, catechol-poly(L-aspartic acid)-b-poly(L-phenylalanine) (Cat-PAsp-PPhe). The nanoparticles consist of Ti-adhesive peripheral catechol groups, anionic PAsp shells, and PPhe inner cores. Field-emission scanning electron microscopy (Fe-SEM) images showed that the Ti-adhesive nanoparticles could be uniformly immobilized on Ti surfaces. X-ray photoelectron spectroscopy (XPS) confirmed the successful anchoring of nanoparticles onto Ti surfaces. After surface immobilization of the nanoparticles, the static water contact angle of the Ti substrate decreased from 75.3° to 50.0° or 36.4°, depending on the surface nanoparticle. Fluorescence microscopic analysis showed that BMP-2 could be effectively incorporated onto the Ti surface with adhesive nanoparticles. BMP-2 was controllably released for up to 40 days. The Ti substrate functionalized with BMP-2-incorporated nanoparticles significantly promoted attachment, proliferation, spreading, and alkaline phosphatase (ALP) activity of human adipose-derived stem cell (hADSC). The catechol-functionalized adhesive nanoparticles may be applied to various medical devices to create surfaces for improved performance.
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Affiliation(s)
- Hong Jae Lee
- Department of Maxillofacial Biomedical Engineering & Institute of Oral Biology, School of Dentistry, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea
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Sneh-Edri H, Likhtenshtein D, Stepensky D. Intracellular Targeting of PLGA Nanoparticles Encapsulating Antigenic Peptide to the Endoplasmic Reticulum of Dendritic Cells and Its Effect on Antigen Cross-Presentation in Vitro. Mol Pharm 2011; 8:1266-75. [DOI: 10.1021/mp200198c] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hadas Sneh-Edri
- Department of Pharmacology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Diana Likhtenshtein
- Department of Pharmacology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - David Stepensky
- Department of Pharmacology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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15
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Vukomanović M, Škapin SD, Poljanšek I, Žagar E, Kralj B, Ignjatović N, Uskoković D. Poly(D,L-lactide-co-glycolide)/hydroxyapatite core–shell nanosphere. Part 2: Simultaneous release of a drug and a prodrug (clindamycin and clindamycin phosphate). Colloids Surf B Biointerfaces 2011; 82:414-21. [DOI: 10.1016/j.colsurfb.2010.09.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 09/15/2010] [Accepted: 09/15/2010] [Indexed: 10/19/2022]
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16
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Nanotechnology and its Relationship to Interventional Radiology. Part II: Drug Delivery, Thermotherapy, and Vascular Intervention. Cardiovasc Intervent Radiol 2010; 34:676-90. [DOI: 10.1007/s00270-010-9967-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2010] [Accepted: 07/22/2010] [Indexed: 01/26/2023]
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17
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Physicochemical principles of controlled release solid dispersion containing a poorly water-soluble drug. Ther Deliv 2010; 1:51-62. [DOI: 10.4155/tde.10.3] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: The aim of this study was to investigate the physicochemical properties of polyethylene oxide (PEO)-based controlled release solid dispersions (CR-SDs) containing aceclofenac, Gelucire® 44/14, poloxamer 407 and pH modifier (Na2CO3). Results: The immediate release solid dispersions containing the pH modifier greatly enhanced the drug dissolution rate to approximately 100%, while the CR-SDs with PEO showed controlled release. A bigger droplet size and a higher surface charge for the CR-SDs were observed compared with the immediate release solid dispersions. The pH modifier played an important role in modulating the release rate of the drug through changes in the drug crystallinity and the hydrogen-bonding interaction, as well as the microenvironmental pH. Near-infrared images revealed a modulation of the PEO concentration to preserve the pH modifier within the system for controlled release of the drug. Conclusion: The dissolution process of PEO-based solid dispersions containing a water-insoluble drug was governed by the changing net effect of the microenvironmental pH, the surface charge, the particle size and the release rate of the pH modifier, as well as the function of PEO in controlling drug release.
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18
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Lo CT, Van Tassel PR, Saltzman WM. Poly(lactide-co-glycolide) nanoparticle assembly for highly efficient delivery of potent therapeutic agents from medical devices. Biomaterials 2010; 31:3631-42. [PMID: 20149428 DOI: 10.1016/j.biomaterials.2010.01.048] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Accepted: 01/12/2010] [Indexed: 01/03/2023]
Abstract
Controlled delivery of therapeutic agents from medical devices can improve their safety and effectiveness in vivo, by ameliorating the surrounding tissue responses and thus maintaining the functional integrity of the devices. Previously, we presented a new method for providing simultaneous controlled delivery from medical devices, by surface assembly of biodegradable polymer nanoparticles (NPs) encapsulating fluorescent dyes. Here, we continue our investigation with NPs loaded with therapeutic agents, dexamethasone (DEX) or plasmid DNA, and evaluated the bioactivity of the released molecules with macrophage cells associated with inflammation. Over a period of one week, NPs encapsulating DEX released 24.9+/-0.8ng from the probe surface and was successful at suppressing macrophage cell growth by 40+/-10%. This percentage of suppression corresponded to approximately 100% drug delivery efficiency, in comparison with the unencapsulated drug. DNA NP coatings, in contrast, released approximately 1ng of plasmid DNA and were effective at transfecting macrophage cells to express the luciferase gene at 300+/-200 relative luminescence/mg total protein. This amount of luciferase activity corresponded to 100% gene delivery efficiency. Thus, NP coatings were capable of providing continuous release of bioactive agents in sufficient quantities to induce relevant biological effects in cell culture studies. These coatings also remained intact, even after 14 days of incubation with phosphate buffered saline. Although the maximum loading for NP coatings is inherently lower than the more established matrix coating, our study suggests that the NP coatings are a more versatile and efficient approach toward drug delivery or gene delivery from a medical device surface and are perhaps best suited for continuous release of highly potent therapeutic agents.
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Affiliation(s)
- Catherine T Lo
- Department of Biomedical Engineering, Yale University, Malone Engineering Center, Room 414, 55 Prospect Street, New Haven, CT 06511, USA
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