1
|
Zhu T, Wan L, Li R, Zhang M, Li X, Liu Y, Cai D, Lu H. Janus structure hydrogels: recent advances in synthetic strategies, biomedical microstructure and (bio)applications. Biomater Sci 2024; 12:3003-3026. [PMID: 38695621 DOI: 10.1039/d3bm02051g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Janus structure hydrogels (JSHs) are novel materials. Their primary fabrication methods and various applications have been widely reported. JSHs are primarily composed of Janus particles (JNPs) and polysaccharide components. They exhibit two distinct physical or chemical properties, generating intriguing characteristics due to their asymmetric structure. Normally, one side (adhesive interface) is predominantly constituted of polysaccharide components, primarily serving excellent adhesion. On the other side (functional surface), they integrate diverse functionalities, concurrently performing a plethora of synergistic functions. In the biomedical field, JSHs are widely applied in anti-adhesion, drug delivery, wound healing, and other areas. It also exhibits functions in seawater desalination and motion sensing. Thus, JSHs hold broad prospects for applications, and they possess significant research value in nanotechnology, environmental science, healthcare, and other fields. Additionally, this article proposes the challenges and future work facing these fields.
Collapse
Affiliation(s)
- Taifu Zhu
- Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, 510280, China.
| | - Lei Wan
- Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, 510280, China.
| | - Ruiqi Li
- Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, 510280, China.
| | - Mu Zhang
- Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, 510280, China.
| | - Xiaoling Li
- Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, 510280, China.
| | - Yilong Liu
- Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, 510280, China.
| | - Dingjun Cai
- Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, 510280, China.
| | - Haibin Lu
- Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, 510280, China.
- Department of Stomatology, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, 510900, China.
| |
Collapse
|
2
|
Danz K, Fleddermann J, Koch M, Fecioru E, Maahs L, Kinsinger N, Krämer J, Kraegeloh A, Wagner S. Evaluation of the Transport and Binding of Dopamine-Loaded PLGA Nanoparticles for the Treatment of Parkinson's Disease Using In Vitro Model Systems. Pharmaceutics 2024; 16:571. [PMID: 38794233 PMCID: PMC11125169 DOI: 10.3390/pharmaceutics16050571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/08/2024] [Accepted: 04/12/2024] [Indexed: 05/26/2024] Open
Abstract
The treatment of Parkinson's disease has been moving into the focus of pharmaceutical development. Yet, the necessity for reliable model systems in the development phase has made research challenging and in vivo models necessary. We have established reliable, reproducible in vitro model systems to evaluate the binding and transport of dopamine-loaded PLGA nanoparticles for the treatment of Parkinson's disease and put the results in context with comparable in vivo results. The in vitro models have provided similar results concerning the usability of the investigated nanoparticles as the previously used in vivo models and thus provide a good alternative in line with the 3R principles in pharmaceutical research.
Collapse
Affiliation(s)
- Karin Danz
- Fraunhofer Institute for Biomedical Engineering IBMT, Joseph-von-Fraunhofer-Weg 1, 66280 Sulzbach, Germany
| | - Jana Fleddermann
- INM—Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany (M.K.); (A.K.)
| | - Marcus Koch
- INM—Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany (M.K.); (A.K.)
| | - Elena Fecioru
- Eurofins PHAST Development GmbH & Co. KG, Byk-Gulden-Str. 2, 78467 Konstanz, Germany
| | - Lorenz Maahs
- Pharmacelsus GmbH, Science Park 2, 66123 Saarbrücken, Germany; (L.M.); (N.K.)
| | - Nicole Kinsinger
- Pharmacelsus GmbH, Science Park 2, 66123 Saarbrücken, Germany; (L.M.); (N.K.)
| | | | - Annette Kraegeloh
- INM—Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany (M.K.); (A.K.)
| | - Sylvia Wagner
- Fraunhofer Institute for Biomedical Engineering IBMT, Joseph-von-Fraunhofer-Weg 1, 66280 Sulzbach, Germany
| |
Collapse
|
3
|
Mormile C, Opriș O, Bellucci S, Lung I, Kacso I, Turza A, La Pietra M, Vacacela Gomez C, Stegarescu A, Soran ML. Enhanced Stability of Dopamine Delivery via Hydrogel with Integrated Graphene. J Funct Biomater 2023; 14:558. [PMID: 38132812 PMCID: PMC10744308 DOI: 10.3390/jfb14120558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/22/2023] [Accepted: 11/22/2023] [Indexed: 12/23/2023] Open
Abstract
The synthesis of graphene-based materials for drug delivery represents an area of active research, and the use of graphene in drug delivery systems is promising due to its unique properties. Thus, in the present work, we discuss the potential of few-layer graphene in a hydrogel system for dopamine release. The hydrogels are frequently used for these systems for their special physico-chemical properties, which can ensure that the drug is effectively released in time. However, the release from such structures is mostly determined by diffusion alone, and to overcome this restriction, the hydrogel can be "improved" with nanoscale fillers like graphene. The release kinetics of the composite obtained were analyzed to better understand how the use of graphene, instead of the more common graphene oxide (GO) and reduced graphene oxide (rGO), affects the characteristics of the system. Thus, the systems developed in this study consist of three main components: biopolymer, graphene, and dopamine. The hydrogels with graphene were prepared by combining two different solutions, one with polyacrylic acid and agarose and one with graphene prepared by the exfoliation method with microwave irradiation. The drug delivery systems were developed by adding dopamine to the obtained hydrogels. After 24 h of release, the presence of dopamine was observed, demonstrating that the system developed can slow down the drug's degradation because of the interactions with the graphene nanoplates and the polymer matrix.
Collapse
Affiliation(s)
- Cristina Mormile
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (C.M.); (O.O.); (I.K.); (A.T.); (A.S.); (M.-L.S.)
- Faculty of Chemistry, Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy
- INFN—National Laboratories of Frascati, Via Enrico Fermi 54, 00044 Frascati, Italy; (M.L.P.); (C.V.G.)
| | - Ocsana Opriș
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (C.M.); (O.O.); (I.K.); (A.T.); (A.S.); (M.-L.S.)
| | - Stefano Bellucci
- INFN—National Laboratories of Frascati, Via Enrico Fermi 54, 00044 Frascati, Italy; (M.L.P.); (C.V.G.)
| | - Ildiko Lung
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (C.M.); (O.O.); (I.K.); (A.T.); (A.S.); (M.-L.S.)
| | - Irina Kacso
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (C.M.); (O.O.); (I.K.); (A.T.); (A.S.); (M.-L.S.)
| | - Alexandru Turza
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (C.M.); (O.O.); (I.K.); (A.T.); (A.S.); (M.-L.S.)
| | - Matteo La Pietra
- INFN—National Laboratories of Frascati, Via Enrico Fermi 54, 00044 Frascati, Italy; (M.L.P.); (C.V.G.)
- Department of Information Engineering, Polytechnic University of Marche, Via Brecce Bianche 12, 60131 Ancona, Italy
| | - Cristian Vacacela Gomez
- INFN—National Laboratories of Frascati, Via Enrico Fermi 54, 00044 Frascati, Italy; (M.L.P.); (C.V.G.)
| | - Adina Stegarescu
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (C.M.); (O.O.); (I.K.); (A.T.); (A.S.); (M.-L.S.)
| | - Maria-Loredana Soran
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (C.M.); (O.O.); (I.K.); (A.T.); (A.S.); (M.-L.S.)
| |
Collapse
|
4
|
Nakmode DD, Day CM, Song Y, Garg S. The Management of Parkinson's Disease: An Overview of the Current Advancements in Drug Delivery Systems. Pharmaceutics 2023; 15:pharmaceutics15051503. [PMID: 37242745 DOI: 10.3390/pharmaceutics15051503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/31/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Parkinson's disease (PD) has significantly affected a large proportion of the elderly population worldwide. According to the World Health Organization, approximately 8.5 million people worldwide are living with PD. In the United States, an estimated one million people are living with PD, with approximately 60,000 new cases diagnosed every year. Conventional therapies available for Parkinson's disease are associated with limitations such as the wearing-off effect, on-off period, episodes of motor freezing, and dyskinesia. In this review, a comprehensive overview of the latest advances in DDSs used to reduce the limitations of current therapies will be presented, and both their promising features and drawbacks will be discussed. We are also particularly interested in the technical properties, mechanism, and release patterns of incorporated drugs, as well as nanoscale delivery strategies to overcome the blood-brain barrier.
Collapse
Affiliation(s)
- Deepa D Nakmode
- Centre for Pharmaceutical Innovation, University of South Australia, North Terrace, Adelaide, SA 5000, Australia
| | - Candace M Day
- Centre for Pharmaceutical Innovation, University of South Australia, North Terrace, Adelaide, SA 5000, Australia
| | - Yunmei Song
- Centre for Pharmaceutical Innovation, University of South Australia, North Terrace, Adelaide, SA 5000, Australia
| | - Sanjay Garg
- Centre for Pharmaceutical Innovation, University of South Australia, North Terrace, Adelaide, SA 5000, Australia
| |
Collapse
|
5
|
Wen J, Li X, Zhang H, Zheng S, Yi C, Yang L, Shi J. Architecting Janus hydrogel evaporator with polydopamine-TiO2 photocatalyst for high-efficient solar desalination and purification. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
|
6
|
Padilla-Godínez FJ, Ruiz-Ortega LI, Guerra-Crespo M. Nanomedicine in the Face of Parkinson's Disease: From Drug Delivery Systems to Nanozymes. Cells 2022; 11:3445. [PMID: 36359841 PMCID: PMC9657131 DOI: 10.3390/cells11213445] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/18/2022] [Accepted: 10/26/2022] [Indexed: 01/02/2024] Open
Abstract
The complexity and overall burden of Parkinson's disease (PD) require new pharmacological approaches to counteract the symptomatology while reducing the progressive neurodegeneration of affected dopaminergic neurons. Since the pathophysiological signature of PD is characterized by the loss of physiological levels of dopamine (DA) and the misfolding and aggregation of the alpha-synuclein (α-syn) protein, new proposals seek to restore the lost DA and inhibit the progressive damage derived from pathological α-syn and its impact in terms of oxidative stress. In this line, nanomedicine (the medical application of nanotechnology) has achieved significant advances in the development of nanocarriers capable of transporting and delivering basal state DA in a controlled manner in the tissues of interest, as well as highly selective catalytic nanostructures with enzyme-like properties for the elimination of reactive oxygen species (responsible for oxidative stress) and the proteolysis of misfolded proteins. Although some of these proposals remain in their early stages, the deepening of our knowledge concerning the pathological processes of PD and the advances in nanomedicine could endow for the development of potential treatments for this still incurable condition. Therefore, in this paper, we offer: (i) a brief summary of the most recent findings concerning the physiology of motor regulation and (ii) the molecular neuropathological processes associated with PD, together with (iii) a recapitulation of the current progress in controlled DA release by nanocarriers and (iv) the design of nanozymes, catalytic nanostructures with oxidoreductase-, chaperon, and protease-like properties. Finally, we conclude by describing the prospects and knowledge gaps to overcome and consider as research into nanotherapies for PD continues, especially when clinical translations take place.
Collapse
Affiliation(s)
- Francisco J. Padilla-Godínez
- Neurosciences Division, Cell Physiology Institute, National Autonomous University of Mexico, Coyoacan, Mexico City 04510, Mexico
- Regenerative Medicine Laboratory, Department of Physiology, Faculty of Medicine, National Autonomous University of Mexico, Coyoacan, Mexico City 04510, Mexico
| | - Leonardo I. Ruiz-Ortega
- Institute for Physical Sciences, National Autonomous University of Mexico, Cuernavaca 62210, Mexico
- Department of Biological Sciences, Columbia University, New York, NY 10027, USA
| | - Magdalena Guerra-Crespo
- Neurosciences Division, Cell Physiology Institute, National Autonomous University of Mexico, Coyoacan, Mexico City 04510, Mexico
- Regenerative Medicine Laboratory, Department of Physiology, Faculty of Medicine, National Autonomous University of Mexico, Coyoacan, Mexico City 04510, Mexico
| |
Collapse
|
7
|
Biodegradable Nanoparticles Loaded with Levodopa and Curcumin for Treatment of Parkinson's Disease. Molecules 2022; 27:molecules27092811. [PMID: 35566173 PMCID: PMC9101601 DOI: 10.3390/molecules27092811] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 04/16/2022] [Accepted: 04/23/2022] [Indexed: 02/06/2023] Open
Abstract
Background: Parkinson’s disease (PD) is the second most common age-related neurodegenerative disorder. Levodopa (L-DOPA) remains the gold-standard drug available for treating PD. Curcumin has many pharmacological activities, including antioxidant, anti-inflammatory, antimicrobial, anti-amyloid, and antitumor properties. Copolymers composed of Poly (ethylene oxide) (PEO) and biodegradable polyesters such as Poly (ε-caprolactone) (PCL) can self-assemble into nanoparticles (NPs). This study describes the development of NH2–PEO–PCL diblock copolymer positively charged and modified by adding glutathione (GSH) on the outer surface, resulting in a synergistic delivery of L-DOPA curcumin that would be able to pass the blood–brain barrier. Methods: The NH2–PEO–PCL NPs suspensions were prepared by using a nanoprecipitation and solvent displacement method and coated with GSH. NPs were submitted to characterization assays. In order to ensure the bioavailability, Vero and PC12 cells were treated with various concentrations of the loaded and unloaded NPs to observe cytotoxicity. Results: NPs have successfully loaded L-DOPA and curcumin and were stable after freeze-drying, indicating advancing into in vitro toxicity testing. Vero and PC12 cells that were treated up to 72 h with various concentrations of L-DOPA and curcumin-loaded NP maintained high viability percentage, indicating that the NPs are biocompatible. Conclusions: NPs consisting of NH2–PEO–PCL were characterized as potential formulations for brain delivery of L-DOPA and curcumin. The results also indicate that the developed biodegradable nanomicelles that were blood compatible presented low cytotoxicity.
Collapse
|
8
|
Effect of Formulation Variables for the Production of WGA-Grafted, Levodopa-Loaded PLGA Nanoparticles. JOURNAL OF BIOMIMETICS BIOMATERIALS AND BIOMEDICAL ENGINEERING 2022. [DOI: 10.4028/www.scientific.net/jbbbe.54.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Levodopa is used for the treatment of Parkinson’s disease (PD) for the last few decades. However, adverse reactions such as dyskinesia, somnolence, nausea, itching, rash, as well as the need for frequent dosing and low bioavailability problems affect the success of the treatment. To prevent side effects caused by conventional therapy, a nanoparticular drug delivery system has been developed, in which receptors are constantly stimulated, and the frequency of dosing is reduced. In this study, levodopa was loaded in Poly lactic-co-glycolic acid (PLGA) nanoparticles (NP) which modified with Wheat Germ Agglutinin (WGA) To increase the effectiveness of levodopa, reduce its side effects and apply to the nasal area which is an alternative way for brain targeting with lower doses. To obtain the optimum levodopa loaded PLGA nanoparticles, the effect of some formulation variables such as polyvinyl alcohol (PVA) concentration, homogenization speed, polymer amount and molecular weight, and levodopa content on the entrapment efficiency (EE) and particle size of the nanoparticles were investigated. Besides these variables, the effect of different parameters on the WGA binding constant was also searched. In addition to in vitro release studies, Differential Scanning Calorimetry (DSC) and Fourier Transform Infrared Spectrophotometer (FT-IR), and Transmission electron microscopy (TEM) analysis were used in the characterization of nanoparticles. Among all formulations, A2 and A8a which was produced with different molcular weights of PLGA, different added levodopa amounts and with different homogenization speeds were chosen as optimum formulations due to their sustained release properties and the ability to release 80 % of their drug content.WGA binding constant was found 78.20 % for A8a-1 and 95 % for A2-1. In this study, we aimed to determine the effect of different formulation parameters on the development of levodopa loaded and WGA grafted PLGA nanoparticles and on the quality characteristics of nanoparticle formulations such as particle size, zeta potential, and EE. In this paper, our results are demonstrated for a better understanding of the effect of process parameters on the development of nanoparticle-based drug delivery systems by using the double-emulsion solvent evaporation technique and on WGA binding of drug-loaded PLGA nanoparticles.
Collapse
|
9
|
Monge-Fuentes V, Biolchi Mayer A, Lima MR, Geraldes LR, Zanotto LN, Moreira KG, Martins OP, Piva HL, Felipe MSS, Amaral AC, Bocca AL, Tedesco AC, Mortari MR. Dopamine-loaded nanoparticle systems circumvent the blood-brain barrier restoring motor function in mouse model for Parkinson's Disease. Sci Rep 2021; 11:15185. [PMID: 34312413 PMCID: PMC8313547 DOI: 10.1038/s41598-021-94175-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 06/03/2021] [Indexed: 12/11/2022] Open
Abstract
Parkinson's disease (PD) is a progressive and chronic neurodegenerative disease of the central nervous system. Early treatment for PD is efficient; however, long-term systemic medication commonly leads to deleterious side-effects. Strategies that enable more selective drug delivery to the brain using smaller dosages, while crossing the complex brain-blood barrier (BBB), are highly desirable to ensure treatment efficacy and decrease/avoid unwanted outcomes. Our goal was to design and test the neurotherapeutic potential of a forefront nanoparticle-based technology composed of albumin/PLGA nanosystems loaded with dopamine (ALNP-DA) in 6-OHDA PD mice model. ALNP-DA effectively crossed the BBB, replenishing dopamine at the nigrostriatal pathway, resulting in significant motor symptom improvement when compared to Lesioned and L-DOPA groups. Notably, ALNP-DA (20 mg/animal dose) additionally up-regulated and restored motor coordination, balance, and sensorimotor performance to non-lesioned (Sham) animal level. Overall, ALNPs represent an innovative, non-invasive nano-therapeutical strategy for PD, considering its efficacy to circumvent the BBB and ultimately deliver the drug of interest to the brain.
Collapse
Affiliation(s)
- Victoria Monge-Fuentes
- Laboratório de Neurofarmacologia, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, 70910-900, Brazil.
| | - Andréia Biolchi Mayer
- Laboratório de Neurofarmacologia, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, 70910-900, Brazil
| | - Marcos Robalinho Lima
- Laboratório de Neurofarmacologia, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, 70910-900, Brazil
- Departamento de Biologia Animal e Plantas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, 86051-970, Brazil
| | - Luiza Ribeiro Geraldes
- Laboratório de Neurofarmacologia, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, 70910-900, Brazil
| | - Larissa Nepomuceno Zanotto
- Laboratório de Neurofarmacologia, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, 70910-900, Brazil
| | - Karla Graziella Moreira
- Laboratório de Neurofarmacologia, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, 70910-900, Brazil
- Laboratório de Fisiologia e Farmacologia, Universidade Federal de Catalão, Goiás, 75704-020, Brazil
| | - Olimpia Paschoal Martins
- Departamento de Química, Centro de Nanotecnologia e Engenharia de Tecidos-Fotobiologia e Fotomedicina, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil
| | - Henrique Luís Piva
- Departamento de Química, Centro de Nanotecnologia e Engenharia de Tecidos-Fotobiologia e Fotomedicina, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil
| | | | - Andre Correa Amaral
- Instituto de Saúde Pública e Patologia Tropical, Universidade Federal de Goiás, Goiânia, Goías, Brazil
| | - Anamélia Lorenzetti Bocca
- Laboratório de Imunologia Aplicada, Departamento de Biologia Celular, Instituto de Ciências Fisiológicas, Universidade de Brasília, Brasília, 70910-900, Brazil
| | - Antonio Claudio Tedesco
- Departamento de Química, Centro de Nanotecnologia e Engenharia de Tecidos-Fotobiologia e Fotomedicina, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil
| | - Márcia Renata Mortari
- Laboratório de Neurofarmacologia, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, 70910-900, Brazil
| |
Collapse
|
10
|
Lee HA, Shin M, Kim J, Choi JW, Lee H. Designing Adaptive Binders for Microenvironment Settings of Silicon Anode Particles. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007460. [PMID: 33629771 DOI: 10.1002/adma.202007460] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 01/01/2021] [Indexed: 06/12/2023]
Abstract
This study reports the concept of an "adaptive binder" to address the silicon anode challenge in Li-ion batteries. Binders exhibit adaptable capabilities upon gradual changes in the microenvironments surrounding silicon particles during anodic expansion-shrinkage cycles. Long, flexible binder chains are repositioned and reoriented upon the gradual formation of Si-micro-environments (Si-μ-env) during the early battery cycles. At this stage, the chemical interactions between the polymeric binders are reversible hydrogen bonds. As the Si-μ-env become stably set by repeated battery cycles, the chemical interactions exhibit reversible-to-irreversible transitions by the formation of covalent linkages between the binder polymers at the later stage of cycles. The binder polymer showing the aforementioned adaptive properties is hyaluronic acid, which has never been explored as a silicon-anode binder material, onto which the plant-inspired adhesive phenolic moiety, gallol (1,2,3-trihydroxybenzene), is conjugated (HA-GA) for stable adhesion to the surfaces of silicon particles. It is confirmed that the HA-GA binder can maintain a charge capacity that is approximately 3.3 times higher (1153 mAh g-1 ) than that of the nonconjugated HA binder (347 mAh g-1 ) after 600 cycles even at a rapid charge/discharge rate of 1 C (3500 mA g-1 ), indicating that adaptive properties are an important factor to consider in designing silicon-anode binders.
Collapse
Affiliation(s)
- Haesung A Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 University Rd., Daejeon, 34141, Republic of Korea
| | - Mikyung Shin
- Department of Intelligent Precision Healthcare Convergence, SKKU Institute for Convergence, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Suwon, 16419, Republic of Korea
| | - Jaemin Kim
- School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University (SNU), 1 Gwanak-ro, Seoul, 08826, Republic of Korea
| | - Jang Wook Choi
- School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University (SNU), 1 Gwanak-ro, Seoul, 08826, Republic of Korea
| | - Haeshin Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 University Rd., Daejeon, 34141, Republic of Korea
| |
Collapse
|
11
|
Stipa P, Marano S, Galeazzi R, Minnelli C, Mobbili G, Laudadio E. Prediction of drug-carrier interactions of PLA and PLGA drug-loaded nanoparticles by molecular dynamics simulations. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110292] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
12
|
Lee W, Choi JH, Lee J, Youn J, Kim W, Jeon G, Lee SW, Song JE, Khang G. Dopamine-Functionalized Gellan Gum Hydrogel as a Candidate Biomaterial for a Retinal Pigment Epithelium Cell Delivery System. ACS APPLIED BIO MATERIALS 2021; 4:1771-1782. [PMID: 35014523 DOI: 10.1021/acsabm.0c01516] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In this study, dopamine-functionalized gellan gum (DFG) hydrogel was prepared as a carrier for retinal pigment epithelium (RPE) cell delivery via a carbodiimide reaction. The carboxylic acid of gellan gum (GG) was replaced with catechol in a 21.3% yield, which was confirmed by NMR. Sol fraction and weight loss measurements revealed that dopamine improved degradability in the GG hydrogel. Measurements of the viscosity, injection force, and compressibility also showed that dopamine-functionalized GG hydrogels had more desirable rheological/mechanical properties for improving injectability. These characteristics were confirmed to arise from the GG's helix structure loosened by the dopamine's bulky nature. Moreover, dopamine's hydrophilic characteristics were confirmed to create a more favorable microenvironment for cell growth by promoting swelling capability and cell attachment. This improved biocompatibility became more pronounced when the hydrophilicity of dopamine was combined with a larger specific surface area stemming from the less porous structure of the dopamine-grafted hydrogels. This effect was apparent from the live/dead staining images of the as-prepared hydrogels. Meanwhile, the nonionic cross-linked DFG (DG) hydrogel showed the lowest protein expression in the immunofluorescence staining images obtained after 28 days of culture, supporting that it had the highest degradability and associated cell-releasing ability. That tendency was also observed in the gene expression data acquired by real-time polymerase chain reaction (RT-PCR) analysis. RT-PCR analysis also revealed that the DG hydrogel carrier could upregulate the visual function-related gene of RPE. Overall, the DG hydrogel system demonstrated its feasibility as a carrier of RPE cells and its potential as a means of improving visual function.
Collapse
Affiliation(s)
- Wonchan Lee
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Joo Hee Choi
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Jaewoo Lee
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.,Department of Polymer-Nano Science and Technology, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Jina Youn
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Wooyoup Kim
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Gayeong Jeon
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Sung Won Lee
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Jeong Eun Song
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Gilson Khang
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.,Department of Polymer-Nano Science and Technology, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| |
Collapse
|
13
|
Hu S, Li H, Fang Q, Chen N, Hu S, Ye J, Ye X, Wang Y. A core–shell double-layer structured polylactic acid/chitosan delivery system containing large molecular protein. IRANIAN POLYMER JOURNAL 2020. [DOI: 10.1007/s13726-020-00856-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
14
|
Nguyen LTB, Hsu CC, Ye H, Cui Z. Development of an in situ injectable hydrogel containing hyaluronic acid for neural regeneration. ACTA ACUST UNITED AC 2020; 15:055005. [PMID: 32324167 DOI: 10.1088/1748-605x/ab8c43] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In this work, a novel enzymatically crosslinked injectable hydrogel comprising hyaluronic acid (HyA), dopamine (DA), and 3-(4-hydroxyphenyl) propionic acid (HPA) conjugates was successfully developed. To the best of our knowledge, it is the first time that HPA is conjugated to a HyA-based backbone. In situ hydrogelation of HyA-DA-HPA occurred in the presence of hydrogen peroxide (H2O2) as an oxidant and horseradish peroxidase (HRP) as a catalyst. Proton nuclear magnetic resonance and Fourier transform infrared spectroscopy were used to characterize the chemical reactions between HyA, DA, and HPA. Gel formation completed between 3 s to 5 min depending on the concentrations of polymer, HRP, and H2O2. Crosslinked HyA-DA-HPA gels acquired storage moduli ranging from ∼100 Pa to ∼20 000 Pa (at f = 2000 rad s-1). Biocompatibility of the hydrogels was examined with human mesenchymal stem cells (hMSCs) and human induced pluripotent stem cell-derived neural stem cells. The hydrogels made of 2.0 w/v% HyA-DA-HPA hydrogels, 0.24 U ml-1 HRP and ≤ 0.5 µmol ml-1 H2O2 were found biocompatible with hMSCs cultured on and encapsulated within the hydrogels. Since HyA serves as a backbone of the extracellular matrix in the central nervous system (CNS) and DA acquires the ability to restore dopaminergic neurons, use of this injectable HyA-DA-HPA hydrogel for stem cell transplantation is a potential treatment strategy for CNS repair and regeneration.
Collapse
Affiliation(s)
- Linh T B Nguyen
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX3 7DQ, United Kingdom. Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, London WC1X 8LD, United Kingdom
| | | | | | | |
Collapse
|
15
|
Arisoy S, Sayiner O, Comoglu T, Onal D, Atalay O, Pehlivanoglu B. In vitro and in vivo evaluation of levodopa-loaded nanoparticles for nose to brain delivery. Pharm Dev Technol 2020; 25:735-747. [PMID: 32141798 DOI: 10.1080/10837450.2020.1740257] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Parkinson's disease (PD) is a neurodegenerative disease which is characterized by the loss of dopaminergic neurons in the brain. Levodopa is the drug of choice in the treatment of PD but it exhibits low oral bioavailability (30%) and very low brain uptake due to its extensive metabolism by aromatic amino acid decarboxylase in the peripheral circulation. Moreover, levodopa has psychic, gastrointestinal, and cardiovascular side effects, and most importantly, short and frequent stimulation of dopamine receptors lead to undesirable conditions such as dyskinesia over time. The challenges are to increase the therapeutic efficiency, the bioavailability and decreasing the unfavourable side effects of levodopa. Biocompatible nano-sized drug carriers could address these challenges at molecular level. For this purpose, levodopa-loaded Poly (lactide-co-glycolide) acid nanoparticles were prepared by double emulsion-solvent evaporation method for nose to brain drug delivery. Parameters such as homogenization speed, and external and internal phase content were modified to reach the highest loading efficiency. F1-1 coded formulation showed prolonged release up to 9 h. Carbodiimide method was used for surface modification studies of nanoparticles. The efficacy of the selected nanoparticle formulation has been demonstrated by in vivo experiments in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine induced PD model in mice.
Collapse
Affiliation(s)
- Sema Arisoy
- Faculty of Pharmacy, Department of Pharmaceutical Technology, Ankara University, Ankara, Turkey.,Faculty of Pharmacy, Department of Pharmaceutical Biotechnology, Inonu University, Malatya, Turkey
| | - Ozgun Sayiner
- Faculty of Pharmacy, Department of Pharmaceutical Technology, Ankara University, Ankara, Turkey
| | - Tansel Comoglu
- Faculty of Pharmacy, Department of Pharmaceutical Technology, Ankara University, Ankara, Turkey
| | - Deniz Onal
- Faculty of Medicine, Department of Physiology, Hacettepe University, Ankara, Turkey
| | - Ozbeyen Atalay
- Faculty of Medicine, Department of Physiology, Hacettepe University, Ankara, Turkey
| | - Bilge Pehlivanoglu
- Faculty of Medicine, Department of Physiology, Hacettepe University, Ankara, Turkey
| |
Collapse
|
16
|
Tang S, Wang A, Yan X, Chu L, Yang X, Song Y, Sun K, Yu X, Liu R, Wu Z, Xue P. Brain-targeted intranasal delivery of dopamine with borneol and lactoferrin co-modified nanoparticles for treating Parkinson's disease. Drug Deliv 2019; 26:700-707. [PMID: 31290705 PMCID: PMC7577045 DOI: 10.1080/10717544.2019.1636420] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/19/2019] [Accepted: 06/23/2019] [Indexed: 12/22/2022] Open
Abstract
Efficient delivery of brain-targeted drugs is highly important for successful therapy in Parkinson's disease (PD). This study was designed to formulate borneol and lactoferrin co-modified nanoparticles (Lf-BNPs) encapsulated dopamine as a novel drug delivery system to achieve maximum therapeutic efficacy and reduce side effects for PD. Dopamine Lf-BNPs were prepared using the double emulsion solvent evaporation method and evaluated for physicochemical and pharmaceutical properties. In vitro cytotoxicity studies indicated that treatment with dopamine Lf-BNPs has relatively low cytotoxicity in SH-SY5Y and 16HBE cells. Qualitative and quantitative cellular uptake experiments indicated that Lf modification of NPs increased cellular uptake of SH-SY5Y cells and 16HBE cells, and borneol modification can promote the cellular uptake of 16HBE. In vivo pharmacokinetic studies indicated that AUC0-12 h in the rat brain for dopamine Lf-BNPs was significantly higher (p < .05) than that of dopamine nanoparticles. Intranasal administration of dopamine Lf-BNPs effectively alleviated the 6-hydroxydopamine-induced striatum lesion in rats as indicated by the contralateral rotation behavior test and results for striatal monoamine neurotransmitter content detection. Taken together, intranasal administration of dopamine Lf-BNPs may be an effective drug delivery system for Parkinson's disease.
Collapse
Affiliation(s)
- Shengnan Tang
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Aiping Wang
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Xiuju Yan
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Liuxiang Chu
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Xiucheng Yang
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Yina Song
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Kaoxiang Sun
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Xin Yu
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Rongxia Liu
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Zimei Wu
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai, China
| | - Peng Xue
- State Key Laboratory of Long-Acting and Targeting Drug Delivery System, Shandong Luye Pharmaceutical Co., Ltd, Yantai, China
| |
Collapse
|
17
|
Preparation of ropivacaine loaded PLGA microspheres as controlled-release system with narrow size distribution and high loading efficiency. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.11.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
18
|
Son HY, Koo BI, Lee JB, Kim KR, Kim W, Jang J, Yoon MS, Cho JW, Nam YS. Tannin-Titanium Oxide Multilayer as a Photochemically Suppressed Ultraviolet Filter. ACS APPLIED MATERIALS & INTERFACES 2018; 10:27344-27354. [PMID: 30039969 DOI: 10.1021/acsami.8b09200] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
UV filters can initiate redox reactions of oxygen and water when exposed to sunlight, generating reactive oxygen species (ROS) that deteriorate the products containing them and cause biological damages. This photochemical reactivity originates from the high chemical potential of UV filters, which also determines the optical properties desirable for sunscreen applications. We hypothesize that this dilemma can be alleviated if the photochemical pathway of UV filters is altered to coupling with redox active molecules. Here, we employ tannic acid (TA) as a key molecule for controlling the photochemical properties of titanium dioxide nanoparticles (TiO2 NPs). TA provides an unusual way for layer-by-layer assembly of TiO2 NPs by the formation of a ligand-to-metal charge transfer complex that alters the nature of UV absorption of TiO2 NPs. The galloyl moieties of TA efficiently scavenge ROS due to the stabilization of ROS by intramolecular hydrogen bonding while facilitating UV screening through direct charge injection from TA to the conduction band of TiO2. The TiO2-TA multilayers assembled in open porous polymer microspheres substantially increased sun protection while dramatically reducing ROS under UV exposure. The assembled structure exhibits excellent in vivo anti-UV skin protection against epidermal hyperplasia, inflammation, and keratinocyte apoptosis without long-term toxicity.
Collapse
Affiliation(s)
| | | | - Jun Bae Lee
- Innovation Lab , Cosmax Research & Innovation Center , 662 Sampyong-dong , Bundang-gu, Seongnam 13486 , Gyeonggi-do , Republic of Korea
| | | | - Woojin Kim
- Pathology Research Center, Department of Jeonbuk Inhalation Research , Korea Institute of Toxicology , 30 Baekhak-1-gil , Jeongup 56212 , Jeonbuk , Republic of Korea
| | - Jihui Jang
- Innovation Lab , Cosmax Research & Innovation Center , 662 Sampyong-dong , Bundang-gu, Seongnam 13486 , Gyeonggi-do , Republic of Korea
| | - Moung Seok Yoon
- Innovation Lab , Cosmax Research & Innovation Center , 662 Sampyong-dong , Bundang-gu, Seongnam 13486 , Gyeonggi-do , Republic of Korea
| | - Jae-Woo Cho
- Pathology Research Center, Department of Jeonbuk Inhalation Research , Korea Institute of Toxicology , 30 Baekhak-1-gil , Jeongup 56212 , Jeonbuk , Republic of Korea
| | | |
Collapse
|
19
|
Kuo YC, Rajesh R. Current development of nanocarrier delivery systems for Parkinson's disease pharmacotherapy. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2018.03.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
20
|
Ren Y, Zhao X, Liang X, Ma PX, Guo B. Injectable hydrogel based on quaternized chitosan, gelatin and dopamine as localized drug delivery system to treat Parkinson’s disease. Int J Biol Macromol 2017; 105:1079-1087. [DOI: 10.1016/j.ijbiomac.2017.07.130] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/05/2017] [Accepted: 07/19/2017] [Indexed: 12/11/2022]
|
21
|
Jung A, Makkar P, Amirian J, Lee BT. A novel hybrid multichannel biphasic calcium phosphate granule-based composite scaffold for cartilage tissue regeneration. J Biomater Appl 2017; 32:775-787. [DOI: 10.1177/0885328217741757] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The objective of the present study was to develop a novel hybrid multichannel biphasic calcium phosphate granule (MCG)-based composite system for cartilage regeneration. First, hyaluronic acid-gelatin (HG) hydrogel was coated onto MCG matrix (MCG-HG). Poly(lactic-co-glycolic acid) (PLGA) microspheres was separately prepared and modified with polydopamine subsequent to BMP-7 loading (B). The surface-modified microspheres were finally embedded into MCG-HG scaffold to develop the novel hybrid (MCG-HG-PLGA-PD-B) composite system. The newly developed MCG-HG-PLGA-PD-B composite was then subjected to scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier Transform infrared spectroscopy, porosity, compressive strength, swelling, BMP-7 release and in-vitro biocompatibility studies. Results showed that 60% of BMP-7 retained on the granular surface after 28 days. A hybrid MCG-HG-PLGA-PD-B composite scaffold exhibited higher swelling and compressive strength compared to MCG-HG or MCG. In-vitro studies showed that MCG-HG-PLGA-PD-B had improved cell viability and cell proliferation for both MC3T3-E1 pre-osteoblasts and ATDC5 pre-chondrocytes cell line with respect to MCG-HG or MCG scaffold. Our results suggest that a hybrid MCG-HG-PLGA-PD-B composite scaffold can be a promising candidate for cartilage regeneration applications.
Collapse
Affiliation(s)
- Albert Jung
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University, 366-1 Ssangyoung-Dong, Cheonan, South Korea
| | - Preeti Makkar
- Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University, 366-1 Ssangyoung-Dong, Cheonan, South Korea
| | - Jhaleh Amirian
- Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University, 366-1 Ssangyoung-Dong, Cheonan, South Korea
| | - Byong-Taek Lee
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University, 366-1 Ssangyoung-Dong, Cheonan, South Korea
- Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University, 366-1 Ssangyoung-Dong, Cheonan, South Korea
| |
Collapse
|
22
|
Leelakanok N, Geary S, Salem A. Fabrication and Use of Poly(d,l-lactide-co-glycolide)-Based Formulations Designed for Modified Release of 5-Fluorouracil. J Pharm Sci 2017; 107:513-528. [PMID: 29045885 DOI: 10.1016/j.xphs.2017.10.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 10/03/2017] [Accepted: 10/06/2017] [Indexed: 12/14/2022]
Abstract
5-fluorouracil (5-FU) is a chemotherapeutic agent that has been used for the treatment of a variety of malignancies since its initial introduction to the clinic in 1957. Owing to its short biological half-life, multiple dosings are generally required to maintain effective 5-FU plasma concentrations throughout the therapeutic period. Clinical studies have shown that continuous 5-FU administration is generally superior to bolus injection as exhibited by lower toxicities and increased therapeutic efficacy. Optimal therapeutic efficacy, however, is often compromised by the limiting therapeutic index. Whilst oral formulations are also used, these suffer from the drawbacks of variable bioavailability and first-pass metabolism. As a result, sustained release formulations of 5-FU have been investigated in an effort to mimic the kinetics of continuous infusion particularly for situations where local delivery is considered appropriate. The biocompatible, biodegradable, and highly tunable synthetic polymer, poly(d,l-lactide-co-glycolide) (PLGA), is widely used as a vector for sustained drug delivery, however, issues such as insufficient loading and inappropriate burst release kinetics have dogged progress into the clinic for small hydrophilic drugs such as 5-FU. This review provides introductory information about the mechanism of action, pharmacokinetic and physicochemical properties, and clinical use of 5-FU that have contributed to the development of PLGA-based 5-FU release platforms. In addition, this review provides information on fabrication methods used for a range of 5-FU-loaded PLGA formulations and discusses factors affecting the release kinetics of 5-FU as well as the in vitro and in vivo antitumor or antiproliferative efficacy of these platforms.
Collapse
Affiliation(s)
- Nattawut Leelakanok
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, Iowa City, Iowa 52242
| | - Sean Geary
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, Iowa City, Iowa 52242
| | - Aliasger Salem
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, Iowa City, Iowa 52242.
| |
Collapse
|
23
|
Han L, Lu X, Liu K, Wang K, Fang L, Weng LT, Zhang H, Tang Y, Ren F, Zhao C, Sun G, Liang R, Li Z. Mussel-Inspired Adhesive and Tough Hydrogel Based on Nanoclay Confined Dopamine Polymerization. ACS NANO 2017; 11:2561-2574. [PMID: 28245107 DOI: 10.1021/acsnano.6b05318] [Citation(s) in RCA: 494] [Impact Index Per Article: 70.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Adhesive hydrogels are attractive biomaterials for various applications, such as electronic skin, wound dressing, and wearable devices. However, fabricating a hydrogel with both adequate adhesiveness and excellent mechanical properties remains a challenge. Inspired by the adhesion mechanism of mussels, we used a two-step process to develop an adhesive and tough polydopamine-clay-polyacrylamide (PDA-clay-PAM) hydrogel. Dopamine was intercalated into clay nanosheets and limitedly oxidized between the layers, resulting in PDA-intercalated clay nanosheets containing free catechol groups. Acrylamide monomers were then added and in situ polymerized to form the hydrogel. Unlike previous single-use adhesive hydrogels, our hydrogel showed repeatable and durable adhesiveness. It adhered directly on human skin without causing an inflammatory response and was easily removed without causing damage. The adhesiveness of this hydrogel was attributed to the presence of enough free catechol groups in the hydrogel, which were created by controlling the oxidation process of the PDA in the confined nanolayers of clay. This mimicked the adhesion mechanism of the mussels, which maintain a high concentration of catechol groups in the confined nanospace of their byssal plaque. The hydrogel also displayed superior toughness, which resulted from nanoreinforcement by clay and PDA-induced cooperative interactions with the hydrogel networks. Moreover, the hydrogel favored cell attachment and proliferation, owning to the high cell affinity of PDA. Rat full-thickness skin defect experiments demonstrated that the hydrogel was an excellent dressing. This free-standing, adhesive, tough, and biocompatible hydrogel may be more convenient for surgical applications than adhesives that involve in situ gelation and extra agents.
Collapse
Affiliation(s)
- Lu Han
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, Sichuan, China
| | - Xiong Lu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, Sichuan, China
- National Engineering Research Center for Biomaterials, Genome Research Center for Biomaterials, Sichuan University , Chengdu 610064, Sichuan, China
| | - Kezhi Liu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, Sichuan, China
| | - Kefeng Wang
- National Engineering Research Center for Biomaterials, Genome Research Center for Biomaterials, Sichuan University , Chengdu 610064, Sichuan, China
| | - Liming Fang
- Department of Polymer Science and Engineering, School of Materials Science and Engineering, South China University of Technology of China , Guangzhou 510641, China
| | - Lu-Tao Weng
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| | - Hongping Zhang
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials Science and Engineering, Southwest University of Science and Technology , Mianyang 621010, China
| | - Youhong Tang
- Centre for NanoScale Science and Technology and School of Computer Science, Engineering, and Mathematics, Flinders University , Adelaide 5042, South Australia, Australia
| | - Fuzeng Ren
- Department of Materials Science and Engineering, South University of Science and Technology , Shenzhen, Guangdong 518055, China
| | - Cancan Zhao
- Department of Materials Science and Engineering, South University of Science and Technology , Shenzhen, Guangdong 518055, China
| | - Guoxing Sun
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| | - Rui Liang
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| | - Zongjin Li
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| |
Collapse
|
24
|
Abouelmagd SA, Meng F, Kim BK, Hyun H, Yeo Y. Tannic acid-mediated surface functionalization of polymeric nanoparticles. ACS Biomater Sci Eng 2016; 2:2294-2303. [PMID: 28944286 PMCID: PMC5609506 DOI: 10.1021/acsbiomaterials.6b00497] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Polymeric nanoparticles (NPs) are decorated with various types of molecules to control their functions and interactions with specific cells. We previously used polydopamine (pD) to prime-coat poly(lactic-co-glycolic acid) (PLGA) NPs and conjugated functional ligands onto the NPs via the pD coating. In this study, we report tannic acid (TA) as an alternative prime coating that is functionally comparable to pD but does not have drawbacks of pD such as optical properties and interference of ligand characterization. TA forms a stable and optically inert coating on PLGA NPs, which can accommodate albumin, chitosan, and folate-terminated polyethylene glycol to control the cell-NP interactions. Moreover, TA coating allows for surface loading of polycyclic planar aromatic compounds. TA is a promising reactive intermediate for surface functionalization of polymeric NPs.
Collapse
Affiliation(s)
- Sara A. Abouelmagd
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
- Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Fanfei Meng
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
- Department of Pharmaceutics, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China
| | - Bieong-Kil Kim
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Hyesun Hyun
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Yoon Yeo
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| |
Collapse
|
25
|
Zhu S, Gu Z, Xiong S, An Y, Liu Y, Yin T, You J, Hu Y. Fabrication of a novel bio-inspired collagen–polydopamine hydrogel and insights into the formation mechanism for biomedical applications. RSC Adv 2016. [DOI: 10.1039/c6ra12306f] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel bio-inspired hydrogel with good biological property and initiative adhesive ability to cells has been fabricated via collagen self-assembly and the incorporation of PDA, which provides a significant potential in biomedical applications.
Collapse
Affiliation(s)
- Shichen Zhu
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
- Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province
| | - Zhipeng Gu
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Shanbai Xiong
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
- Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province
| | - Yueqi An
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
| | - Youming Liu
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
| | - Tao Yin
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
| | - Juan You
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
| | - Yang Hu
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
- Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province
| |
Collapse
|
26
|
Zeynep EY, Antoine D, Brice C, Frank B, Christine J. Double hydrophilic polyphosphoester containing copolymers as efficient templating agents for calcium carbonate microparticles. J Mater Chem B 2015; 3:7227-7236. [PMID: 32262830 DOI: 10.1039/c5tb00887e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The use of calcium carbonate (CaCO3) microparticles is becoming more and more attractive in many fields especially in biomedical applications in which the fine tuning of the size, morphology and crystalline form of the CaCO3 particles is crucial. Although some structuring compounds, like hyaluronic acid, give satisfying results, the control of the particle structure still has to be improved. To this end, we evaluated the CaCO3 structuring capacity of novel well-defined double hydrophilic block copolymers composed of poly(ethylene oxide) and a polyphosphoester segment with an affinity for calcium like poly(phosphotriester)s bearing pendent carboxylic acids or poly(phosphodiester)s with a negatively charged oxygen atom on each repeating monomer unit. These copolymers were synthesized by a combination of organocatalyzed ring opening polymerization, thiol-yne click chemistry and protection/deprotection methods. The formulation of CaCO3 particles was then performed in the presence of these block copolymers (i) by the classical chemical pathway involving CaCl2 and Na2CO3 and (ii) by a process based on supercritical carbon dioxide (scCO2) technology in which CO3 2- ions are generated in aqueous media and react with Ca2+ ions. Porous CaCO3 microspheres composed of vaterite nanocrystals were obtained. Moreover, a clear dependence of the particle size on the structure of the templating agent was emphasized. In this work, we show that the use of the supercritical process and the substitution of hyaluronic acid for a carboxylic acid containing copolymer decreases the size of the CaCO3 particles by a factor of 6 (∼1.5 μm) while preventing their aggregation.
Collapse
Affiliation(s)
- Ergul Yilmaz Zeynep
- Chemistry Department, Center for Education and Research on Macromolecules (CERM), University of Liège (ULg), Sart Tilman, Building B6a-third floor, Liège, B-4000, Belgium.
| | | | | | | | | |
Collapse
|
27
|
Pahuja R, Seth K, Shukla A, Shukla RK, Bhatnagar P, Chauhan LKS, Saxena PN, Arun J, Chaudhari BP, Patel DK, Singh SP, Shukla R, Khanna VK, Kumar P, Chaturvedi RK, Gupta KC. Trans-blood brain barrier delivery of dopamine-loaded nanoparticles reverses functional deficits in parkinsonian rats. ACS NANO 2015; 9:4850-71. [PMID: 25825926 DOI: 10.1021/nn506408v] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Sustained and safe delivery of dopamine across the blood brain barrier (BBB) is a major hurdle for successful therapy in Parkinson's disease (PD), a neurodegenerative disorder. Therefore, in the present study we designed neurotransmitter dopamine-loaded PLGA nanoparticles (DA NPs) to deliver dopamine to the brain. These nanoparticles slowly and constantly released dopamine, showed reduced clearance of dopamine in plasma, reduced quinone adduct formation, and decreased dopamine autoxidation. DA NPs were internalized in dopaminergic SH-SY5Y cells and dopaminergic neurons in the substantia nigra and striatum, regions affected in PD. Treatment with DA NPs did not cause reduction in cell viability and morphological deterioration in SH-SY5Y, as compared to bulk dopamine-treated cells, which showed reduced viability. Herein, we report that these NPs were able to cross the BBB and capillary endothelium in the striatum and substantia nigra in a 6-hydroxydopamine (6-OHDA)-induced rat model of PD. Systemic intravenous administration of DA NPs caused significantly increased levels of dopamine and its metabolites and reduced dopamine-D2 receptor supersensitivity in the striatum of parkinsonian rats. Further, DA NPs significantly recovered neurobehavioral abnormalities in 6-OHDA-induced parkinsonian rats. Dopamine delivered through NPs did not cause additional generation of ROS, dopaminergic neuron degeneration, and ultrastructural changes in the striatum and substantia nigra as compared to 6-OHDA-lesioned rats. Interestingly, dopamine delivery through nanoformulation neither caused alterations in the heart rate and blood pressure nor showed any abrupt pathological change in the brain and other peripheral organs. These results suggest that NPs delivered dopamine into the brain, reduced dopamine autoxidation-mediated toxicity, and ultimately reversed neurochemical and neurobehavioral deficits in parkinsonian rats.
Collapse
Affiliation(s)
- Richa Pahuja
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Kavita Seth
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | - Anshi Shukla
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | - Rajendra Kumar Shukla
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | | | | | - Prem Narain Saxena
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | - Jharna Arun
- ∥CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow 226001, India
| | - Bhushan Pradosh Chaudhari
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Devendra Kumar Patel
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Sheelendra Pratap Singh
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | - Rakesh Shukla
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
- ∥CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow 226001, India
| | - Vinay Kumar Khanna
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Pradeep Kumar
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Rajnish Kumar Chaturvedi
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Kailash Chand Gupta
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| |
Collapse
|
28
|
Hwang SH, Kang D, Ruoff RS, Shin HS, Park YB. Poly(vinyl alcohol) reinforced and toughened with poly(dopamine)-treated graphene oxide, and its use for humidity sensing. ACS NANO 2014; 8:6739-47. [PMID: 24911396 DOI: 10.1021/nn500504s] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Poly(dopamine)-treated graphene oxide/poly(vinyl alcohol) ("dG-O/PVA") composite films were made and characterized. G-O was modified with poly(dopamine) in aqueous solution and then chemically reduced to yield poly(dopamine)-treated reduced G-O. A combination of hydrogen bonding, strong adhesion of poly(dopamine) at the interface of PVA and G-O sheets, and reinforcement by G-O resulted in increases in tensile modulus, ultimate tensile strength, and strain-to-failure by 39, 100, and 89%, respectively, at 0.5 wt % dG-O loading of the PVA. The dG-O serves as a moisture barrier for water-soluble PVA, and the dG-O/PVA composite films were shown to be effective humidity sensors over the relative humidity range 40-100%.
Collapse
Affiliation(s)
- Sang-Ha Hwang
- Low Dimensional Carbon Materials Center, ‡School of Mechanical and Nuclear Engineering, §School of Natural Science, and ⊥Center for Multidimensional Carbon Materials, Institute of Basic Sciences, Ulsan National Institute of Science and Technology , UNIST-gil 50, Eonyang-eup, Ulju-gun, Ulsan 689-798 Republic of Korea
| | | | | | | | | |
Collapse
|
29
|
Liu Y, Chang CP, Sun T. Dopamine-assisted deposition of dextran for nonfouling applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3118-3126. [PMID: 24588325 DOI: 10.1021/la500006e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nonfouling surfaces are essential for many biomedical applications, such as diagnostic biosensors and blood- or tissue-contacting implants. In this study, we demonstrate a simple one-step method to introduce dextran onto various substrates based on dopamine polymerization. It has been shown for the first time that dextran molecules could be incorporated into a dopamine polymerization product via mixing dextran with dopamine in a slightly alkaline solution. The codeposited film was characterized by X-ray photoelectron spectroscopy (XPS), the water contact angle, ellipsometry, and atomic force microscopy (AFM). Results reveal that it is possible to control the thickness and surface roughness via the deposition time and deposition repeat cycles. Furthermore, quartz crystal microbalance (QCM) measurements show that the dextran-modified surface inhibits protein adhesion. In addition, cell attachment has been significantly inhibited on dextran-modified surfaces even after exposure to water for as long as 2 months. The described dopamine-assisted dextran modification represents a simple and universal method for nonfouling surface preparation and can be potentially applied to improve the performance of various medical devices and materials.
Collapse
Affiliation(s)
- Yunxiao Liu
- Miniaturized Medical Device Program and ‡Bio-Electronic Program, Institute of Microelectronic, A* STAR (Agency for Science, Technology and Research) , 11 Science Park Road, Science Park II, Singapore 117685
| | | | | |
Collapse
|