1
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Gottipati MK, D'Amato AR, Saksena J, Popovich PG, Wang Y, Gilbert RJ. Delayed administration of interleukin-4 coacervate alleviates the neurotoxic phenotype of astrocytes and promotes functional recovery after a contusion spinal cord injury. J Neural Eng 2024; 21:046052. [PMID: 39029499 DOI: 10.1088/1741-2552/ad6596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 07/19/2024] [Indexed: 07/21/2024]
Abstract
Objective. Macrophages and astrocytes play a crucial role in the aftermath of a traumatic spinal cord injury (SCI). Infiltrating macrophages adopt a pro-inflammatory phenotype while resident astrocytes adopt a neurotoxic phenotype at the injury site, both of which contribute to neuronal death and inhibit axonal regeneration. The cytokine interleukin-4 (IL-4) has shown significant promise in preclinical models of SCI by alleviating the macrophage-mediated inflammation and promoting functional recovery. However, its effect on neurotoxic reactive astrocytes remains to be elucidated, which we explored in this study. We also studied the beneficial effects of a sustained release of IL-4 from an injectable biomaterial compared to bolus administration of IL-4.Approach. We fabricated a heparin-based coacervate capable of anchoring and releasing bioactive IL-4 and tested its efficacyin vitroandin vivo. Main results. We show that IL-4 coacervate is biocompatible and drives a robust anti-inflammatory macrophage phenotype in culture. We also show that IL-4 and IL-4 coacervate can alleviate the reactive neurotoxic phenotype of astrocytes in culture. Finally, using a murine model of contusion SCI, we show that IL-4 and IL-4 coacervate, injected intraspinally 2 d post-injury, can reduce macrophage-mediated inflammation, and alleviate neurotoxic astrocyte phenotype, acutely and chronically, while also promoting neuroprotection with significant improvements in hindlimb locomotor recovery. We observed that IL-4 coacervate can promote a more robust regenerative macrophage phenotypein vitro, as well as match its efficacyin vivo,compared to bolus IL-4.Significance. Our work shows the promise of coacervate as a great choice for local and prolonged delivery of cytokines like IL-4. We support this by showing that the coacervate can release bioactive IL-4, which acts on macrophages and astrocytes to promote a pro-regenerative environment following a SCI leading to robust neuroprotective and functional outcomes.
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Affiliation(s)
- Manoj K Gottipati
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, United States of America
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, United States of America
- Department of Neuroscience, The Ohio State University, 460 W. 12th Avenue, Columbus, OH 43210, United States of America
- Center for Brain and Spinal Cord Repair, The Ohio State University, 460 W. 12th Avenue, Columbus, OH 43210, United States of America
| | - Anthony R D'Amato
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, 134 Hollister Drive, 283 Kimball Hall, Ithaca, NY 14853, United States of America
| | - Jayant Saksena
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, United States of America
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, United States of America
| | - Phillip G Popovich
- Department of Neuroscience, The Ohio State University, 460 W. 12th Avenue, Columbus, OH 43210, United States of America
- Center for Brain and Spinal Cord Repair, The Ohio State University, 460 W. 12th Avenue, Columbus, OH 43210, United States of America
| | - Yadong Wang
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, 134 Hollister Drive, 283 Kimball Hall, Ithaca, NY 14853, United States of America
| | - Ryan J Gilbert
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, United States of America
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, United States of America
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2
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Bonde S, Osmani RAM, Trivedi R, Patravale V, Angolkar M, Prasad AG, Ravikumar AA. Harnessing DNA origami's therapeutic potential for revolutionizing cardiovascular disease treatment: A comprehensive review. Int J Biol Macromol 2024; 270:132246. [PMID: 38735608 DOI: 10.1016/j.ijbiomac.2024.132246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 03/25/2024] [Accepted: 05/07/2024] [Indexed: 05/14/2024]
Abstract
DNA origami is a cutting-edge nanotechnology approach that creates precise and detailed 2D and 3D nanostructures. The crucial feature of DNA origami is how it is created, which enables precise control over its size and shape. Biocompatibility, targetability, programmability, and stability are further advantages that make it a potentially beneficial technique for a variety of applications. The preclinical studies of sophisticated programmable nanomedicines and nanodevices that can precisely respond to particular disease-associated triggers and microenvironments have been made possible by recent developments in DNA origami. These stimuli, which are endogenous to the targeted disorders, include protein upregulation, pH, redox status, and small chemicals. Oncology has traditionally been the focus of the majority of past and current research on this subject. Therefore, in this comprehensive review, we delve into the intricate world of DNA origami, exploring its defining features and capabilities. This review covers the fundamental characteristics of DNA origami, targeting DNA origami to cells, cellular uptake, and subcellular localization. Throughout the review, we emphasised on elucidating the imperative for such a therapeutic platform, especially in addressing the complexities of cardiovascular disease (CVD). Moreover, we explore the vast potential inherent in DNA origami technology, envisioning its promising role in the realm of CVD treatment and beyond.
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Affiliation(s)
- Smita Bonde
- Department of Pharmaceutics, SSR College of Pharmacy, Silvassa 396230, UT of Dadra and Nagar Haveli, India.
| | - Riyaz Ali M Osmani
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSS AHER), Mysuru 570015, Karnataka, India.
| | - Rashmi Trivedi
- Department of Pharmaceutics, Smt. Kishoritai Bhoyar College of Pharmacy, Kamptee, Nagpur 441002, Maharashtra, India.
| | - Vandana Patravale
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga (E), Mumbai 400019, Maharashtra, India.
| | - Mohit Angolkar
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSS AHER), Mysuru 570015, Karnataka, India.
| | - Aprameya Ganesh Prasad
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
| | - Akhila Akkihebbal Ravikumar
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSS AHER), Mysuru 570015, Karnataka, India.
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3
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Padmakumar S, D'Souza A, Parayath NN, Bleier BS, Amiji MM. Nucleic acid therapies for CNS diseases: Pathophysiology, targets, barriers, and delivery strategies. J Control Release 2022; 352:121-145. [PMID: 36252748 DOI: 10.1016/j.jconrel.2022.10.018] [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: 06/23/2022] [Revised: 09/10/2022] [Accepted: 10/10/2022] [Indexed: 11/08/2022]
Abstract
Nucleic acid therapeutics have emerged as one of the very advanced and efficacious treatment approaches for debilitating health conditions, including those diseases affecting the central nervous system (CNS). Precise targeting with an optimal control over gene regulation confers long-lasting benefits through the administration of nucleic acid payloads via viral, non-viral, and engineered vectors. The current review majorly focuses on the development and clinical translational potential of non-viral vectors for treating CNS diseases with a focus on their specific design and targeting approaches. These carriers must be able to surmount the various intracellular and extracellular barriers, to ensure successful neuronal transfection and ultimately attain higher therapeutic efficacies. Additionally, the specific challenges associated with CNS administration also include the presence of blood-brain barrier (BBB), the complex pathophysiological and biochemical changes associated with different disease conditions and the existence of non-dividing cells. The advantages offered by lipid-based or polymeric systems, engineered proteins, particle-based systems coupled with various approaches of neuronal targeting have been discussed in the context of a variety of CNS diseases. The possibilities of rapid yet highly efficient gene modifications rendered by the breakthrough methodologies for gene editing and gene manipulation have also opened vast avenues of research in neuroscience and CNS disease therapy. The current review also underscores the extensive scientific efforts to optimize specialized, efficacious yet non-invasive and safer administration approaches to overcome the therapeutic delivery challenges specifically posed by the CNS transport barriers and the overall obstacles to clinical translation.
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Affiliation(s)
- Smrithi Padmakumar
- Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA 02115, USA
| | - Anisha D'Souza
- Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA 02115, USA; Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA 20115, USA
| | - Neha N Parayath
- Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA 02115, USA
| | - Benjamin S Bleier
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA 20115, USA
| | - Mansoor M Amiji
- Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA 02115, USA; Department of Chemical Engineering, College of Engineering, Northeastern University, Boston, MA 02115, USA.
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4
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Mundel R, Thakur T, Chatterjee M. Emerging uses of PLA-PEG copolymer in cancer drug delivery. 3 Biotech 2022; 12:41. [PMID: 35070631 PMCID: PMC8748584 DOI: 10.1007/s13205-021-03105-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 12/28/2021] [Indexed: 02/03/2023] Open
Abstract
Traditional therapies need high systematic dosages that not only destroys cancerous cells but also healthy cells. To overcome this problem recent advancement in nanotechnology specifically in nanomaterials has been extensively done for various biological applications, such as targeted drug delivery. Nanotechnology, as a frontier science, has the potential to break down all the obstacles to be more effective and secure drug delivery system. It is possible to develop nanopolymer based drug carrier that can target drugs with extreme accuracy. Polymers can advance drug delivery technologies by allowing controlled release of therapeutic drugs in stable amounts over long duration of time. For controlled drug delivery, biodegradable synthetic polymers have various benefits over non-biodegradable polymers. Biodegradable polymer either are less toxic or non-toxic. Polylactic Acid (PLA) is one of the most remarkable amphipathic polymers which make it one of the most suitable materials for polymeric micelles. Amphiphilic nanomaterial, such as Polyethylene Glycol (PEG), is one of the most promising carrier for tumor targeting. PLA-PEG as a copolymer has been generally utilized as drug delivery system for the various types of cancer. Chemotherapeutic drugs are stacked into PLA-PEG copolymer and as a result their duration time delays, hence medications arrive at specific tumor site.
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Affiliation(s)
- Rohit Mundel
- Biotechnology Branch, University Institute of Engineering and Technology, Panjab University, Sector-25, South Campus, Chandigarh, 160014 India
| | - Tanya Thakur
- Biotechnology Branch, University Institute of Engineering and Technology, Panjab University, Sector-25, South Campus, Chandigarh, 160014 India
| | - Mary Chatterjee
- Biotechnology Branch, University Institute of Engineering and Technology, Panjab University, Sector-25, South Campus, Chandigarh, 160014 India
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5
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Ghiman R, Pop R, Rugina D, Focsan M. Recent progress in preparation of microcapsules with tailored structures for bio-medical applications. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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The biological applications of DNA nanomaterials: current challenges and future directions. Signal Transduct Target Ther 2021; 6:351. [PMID: 34620843 PMCID: PMC8497566 DOI: 10.1038/s41392-021-00727-9] [Citation(s) in RCA: 98] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 06/24/2021] [Accepted: 07/30/2021] [Indexed: 02/08/2023] Open
Abstract
DNA, a genetic material, has been employed in different scientific directions for various biological applications as driven by DNA nanotechnology in the past decades, including tissue regeneration, disease prevention, inflammation inhibition, bioimaging, biosensing, diagnosis, antitumor drug delivery, and therapeutics. With the rapid progress in DNA nanotechnology, multitudinous DNA nanomaterials have been designed with different shape and size based on the classic Watson-Crick base-pairing for molecular self-assembly. Some DNA materials could functionally change cell biological behaviors, such as cell migration, cell proliferation, cell differentiation, autophagy, and anti-inflammatory effects. Some single-stranded DNAs (ssDNAs) or RNAs with secondary structures via self-pairing, named aptamer, possess the ability of targeting, which are selected by systematic evolution of ligands by exponential enrichment (SELEX) and applied for tumor targeted diagnosis and treatment. Some DNA nanomaterials with three-dimensional (3D) nanostructures and stable structures are investigated as drug carrier systems to delivery multiple antitumor medicine or gene therapeutic agents. While the functional DNA nanostructures have promoted the development of the DNA nanotechnology with innovative designs and preparation strategies, and also proved with great potential in the biological and medical use, there is still a long way to go for the eventual application of DNA materials in real life. Here in this review, we conducted a comprehensive survey of the structural development history of various DNA nanomaterials, introduced the principles of different DNA nanomaterials, summarized their biological applications in different fields, and discussed the current challenges and further directions that could help to achieve their applications in the future.
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7
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Wang Q, Newby BMZ. Octadecyltrichlorosilane Incorporated Alginate Micro-granules as Sustained-Release Carriers for Small Hydrophilic Molecules. Curr Drug Deliv 2020; 17:333-342. [DOI: 10.2174/1567201817666200210123328] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 07/29/2019] [Accepted: 01/29/2020] [Indexed: 11/22/2022]
Abstract
Background:
Hydrogels are excellent drug carriers, but their inability to retain hydrophilic
drugs for a prolonged period of time has greatly limited their usage. Research has mostly focused on
intricate designs and manipulations of hydrogels to expand their applications in drug delivery.
Objective:
In this study, a simple approach by incorporating a hydrophobic agent, octadecyltrichlorosilane
(OTS), to alginate hydrogel micro-granules (Alg-Ms), was investigated as an effective
technique to prolong the release of small hydrophilic drugs.
Methods:
Sodium Benzoate (SB), a highly water-soluble antimicrobial and anti-inflammatory compound,
was used as a model drug. The presence of hydrophobic OTS impeded swelling of these OTS
incorporated Alg-Ms (OTS-Alg-Ms), hence sustaining the release of SB.
Results:
The release data was fitted with Ritger-Peppas and Peppas-Sahlin models and the results showed
that SB released from OTS-Alg-Ms with higher OTS content was mainly controlled by Fickian diffusion;
with a lower OTS content, OTS-Alg-Ms swelled more easily, the combined diffusion and swelling
led to a faster SB release.
Conclusion:
Thus, by simply tuning the OTS concentration in the solution where Alg-Ms were briefly
submerged in a predefined release period, from hours to a few days, small hydrophilic drugs from these
OTS-Alg-Ms could be successfully achieved.
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Affiliation(s)
- Qing Wang
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325-3906, United States
| | - Bi-min Zhang Newby
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325-3906, United States
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8
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Sengupta P, Mondal P, Mukherjee S, Chanda S, Bose A. Rutin- serum albumin interaction in different media and its effective dose selection in radiation-induced cytotoxicity on human blood cells. J Herb Med 2020. [DOI: 10.1016/j.hermed.2019.100322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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9
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Influencing neuroplasticity in stroke treatment with advanced biomaterials-based approaches. Adv Drug Deliv Rev 2019; 148:204-218. [PMID: 30579882 DOI: 10.1016/j.addr.2018.12.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 11/05/2018] [Accepted: 12/17/2018] [Indexed: 02/06/2023]
Abstract
Since the early 1990s, we have known that the adult brain is not static and has the capacity to repair itself. The delivery of various therapeutic factors and cells have resulted in some exciting pre-clinical and clinical outcomes in stroke models by targeting post-injury plasticity to enhance recovery. Developing a deeper understanding of the pathways that modulate plasticity will enable us to optimize delivery strategies for therapeutics and achieve more robust effects. Biomaterials are a key tool for the optimization of these potential treatments, owing to their biocompatibility and tunability. In this review, we identify factors and targets that impact plastic processes known to contribute to recovery, discuss the role of biomaterials in enhancing the efficacy of treatment strategies, and suggest combinatorial approaches based on the stage of injury progression.
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10
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Peng Y, Tellier LE, Temenoff JS. Heparin-based hydrogels with tunable sulfation & degradation for anti-inflammatory small molecule delivery. Biomater Sci 2018; 4:1371-80. [PMID: 27447003 DOI: 10.1039/c6bm00455e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Sustained release of anti-inflammatory agents remains challenging for small molecule drugs due to their low molecular weight and hydrophobicity. Therefore, the goal of this study was to control the release of a small molecule anti-inflammatory agent, crystal violet (CV), from hydrogels fabricated with heparin, a highly sulfated glycosaminoglycan capable of binding positively-charged molecules such as CV. In this system, both electrostatic interactions between heparin and CV and hydrogel degradation were tuned simultaneously by varying the level of heparin sulfation and varying the amount of dithiothreitol within hydrogels, respectively. It was found that heparin sulfation significantly affected CV release, whereby more sulfated heparin hydrogels (Hep and Hep(-N)) released CV with near zero-order release kinetics (R-squared values between 0.96-0.99). Furthermore, CV was released more quickly from fast-degrading hydrogels than slow-degrading hydrogels, providing a method to tune total CV release between 5-15 days while maintaining linear release kinetics. In particular, N-desulfated heparin hydrogels exhibited efficient CV loading (∼90% of originally included CV), near zero-order CV release kinetics, and maintenance of CV bioactivity after release, making this hydrogel formulation a promising CV delivery vehicle for a wide range of inflammatory diseases.
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Affiliation(s)
- Yifeng Peng
- W.H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA 30332, USA.
| | - Liane E Tellier
- W.H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA 30332, USA.
| | - Johnna S Temenoff
- W.H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA 30332, USA. and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332, USA
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11
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Giordano C, Albani D, Gloria A, Tunesi M, Batelli S, Russo T, Forloni G, Ambrosio L, Cigada A. Multidisciplinary Perspectives for Alzheimer's and Parkinson's Diseases: Hydrogels for Protein Delivery and Cell-Based Drug Delivery as Therapeutic Strategies. Int J Artif Organs 2018; 32:836-50. [DOI: 10.1177/039139880903201202] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This review presents two intriguing multidisciplinary strategies that might make the difference in the treatment of neurodegenerative disorders such as Alzheimer's and Parkinson's diseases. The first proposed strategy is based on the controlled delivery of recombinant proteins known to play a key role in these neurodegenerative disorders that are released in situ by optimized polymer-based systems. The second strategy is the use of engineered cells, encapsulated and delivered in situ by suitable polymer-based systems, that act as drug reservoirs and allow the delivery of selected molecules to be used in the treatment of Alzheimer's and Parkinson's diseases. In both these scenarios, the design and development of optimized polymer-based drug delivery and cell housing systems for central nervous system applications represent a key requirement. Materials science provides suitable hydrogel-based tools to be optimized together with suitably designed recombinant proteins or drug delivering-cells that, once in situ, can provide an effective treatment for these neurodegenerative disorders. In this scenario, only interdisciplinary research that fully integrates biology, biochemistry, medicine and materials science can provide a springboard for the development of suitable therapeutic tools, not only for the treatment of Alzheimer's and Parkinson's diseases but also, prospectively, for a wide range of severe neurodegenerative disorders.
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Affiliation(s)
- Carmen Giordano
- Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Milan - Italy
| | - Diego Albani
- Department of Neuroscience, Institute for Pharmacological Research “Mario Negri”, Milan - Italy
| | - Antonio Gloria
- Institute of Composite and Biomedical Materials, National Research Council, Naples - Italy
| | - Marta Tunesi
- Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Milan - Italy
| | - Sara Batelli
- Department of Neuroscience, Institute for Pharmacological Research “Mario Negri”, Milan - Italy
| | - Teresa Russo
- Department of Materials and Production Engineering, University of Naples “Federico II”, Naples - Italy
| | - Gianluigi Forloni
- Department of Neuroscience, Institute for Pharmacological Research “Mario Negri”, Milan - Italy
| | - Luigi Ambrosio
- Institute of Composite and Biomedical Materials, National Research Council, Naples - Italy
| | - Alberto Cigada
- Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Milan - Italy
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12
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Qiao X, Peng X, Qiao J, Jiang Z, Han B, Yang C, Liu W. Evaluation of a photocrosslinkable hydroxyethyl chitosan hydrogel as a potential drug release system for glaucoma surgery. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 28:149. [PMID: 28831622 DOI: 10.1007/s10856-017-5954-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 08/01/2017] [Indexed: 06/07/2023]
Abstract
Hydroxyethyl chitosan (HECTS) is a critical derivative of chitosan that has been widely used as biomedical materials due to great water-solubility and excellent biocompatibility. Here, photosensitive hydroxyethyl chitosan was synthesized by introducing azide group on NH2 of HECTS (HECTS-AZ), afterwards FTIR and 1H NMR spectra were detected to confirm the formation of HECTS-AZ. The solution of HECTS-AZ can achieve a sol-gel transition through UV irradiation for 30 s. The evaluation of biocompability and biodegradability in vivo was conducted in rats, visual and pathological examinations exhibited the HECTS-AZ has excellent biocompability and degradation time of the hydrogel is more than 14 weeks. Furthermore, HECTS-AZ hydrogel as an ocular drug delivery system loading heparin was prepared to implant under sclera of rabbit after glaucoma filtration surgery (GFS). The experimental results demonstrated the heparin loaded hydrogel can effectively maintain filtration bleb and lowing intraocular pressure (IOP) after GFS for prolonged time. Besides, obvious inflammatory reactions and side effects have not been observed in ocular during the experimental period. In conclusion, the HECTS-AZ hydrogel is a potential drug delivery device for the treatment of glaucoma and other ocular diseases.
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Affiliation(s)
- Xuesong Qiao
- College of Marine Life Sciences, Ocean University of China, Shandong, Qingdao, PR China
| | - Xiaoting Peng
- College of Marine Life Sciences, Ocean University of China, Shandong, Qingdao, PR China
| | - Jing Qiao
- College of Marine Life Sciences, Ocean University of China, Shandong, Qingdao, PR China
| | - Zhiwen Jiang
- College of Marine Life Sciences, Ocean University of China, Shandong, Qingdao, PR China
| | - Baoqin Han
- College of Marine Life Sciences, Ocean University of China, Shandong, Qingdao, PR China.
| | - Chaozhong Yang
- Affiliated Hospital of Heze Medical College, Heze, Shandong, PR China
| | - Wanshun Liu
- College of Marine Life Sciences, Ocean University of China, Shandong, Qingdao, PR China
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13
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Liu CF, Chen R, Frezzo JA, Katyal P, Hill LK, Yin L, Srivastava N, More HT, Renfrew PD, Bonneau R, Montclare JK. Efficient Dual siRNA and Drug Delivery Using Engineered Lipoproteoplexes. Biomacromolecules 2017; 18:2688-2698. [PMID: 28686014 DOI: 10.1021/acs.biomac.7b00203] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An engineered supercharged coiled-coil protein (CSP) and the cationic transfection reagent Lipofectamine 2000 are combined to form a lipoproteoplex for the purpose of dual delivery of siRNA and doxorubicin. CSP, bearing an external positive charge and axial hydrophobic pore, demonstrates the ability to condense siRNA and encapsulate the small-molecule chemotherapeutic, doxorubicin. The lipoproteoplex demonstrates improved doxorubicin loading relative to Lipofectamine 2000. Furthermore, it induces effective transfection of GAPDH (60% knockdown) in MCF-7 breast cancer cells with efficiencies comparing favorably to Lipofectamine 2000. When the lipoproteoplex is loaded with doxorubicin, the improved doxorubicin loading (∼40 μg Dox/mg CSP) results in a substantial decrease in MCF-7 cell viability.
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Affiliation(s)
- Che Fu Liu
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering , Brooklyn, New York 11201, United States
| | - Raymond Chen
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering , Brooklyn, New York 11201, United States
| | - Joseph A Frezzo
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering , Brooklyn, New York 11201, United States
| | - Priya Katyal
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering , Brooklyn, New York 11201, United States
| | - Lindsay K Hill
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering , Brooklyn, New York 11201, United States.,Department of Biomedical Engineering, State University of New York Downstate Medical Center , Brooklyn, New York 11203, United States.,Department of Radiology, New York University School of Medicine , New York, New York 10016, United States
| | - Liming Yin
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering , Brooklyn, New York 11201, United States
| | - Nikita Srivastava
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering , Brooklyn, New York 11201, United States
| | - Haresh T More
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering , Brooklyn, New York 11201, United States
| | - P Douglas Renfrew
- Center for Computational Biology, Flatiron Institute, Simons Foundation , 162 Fifth Avenue, New York, New York 10010, United States
| | - Richard Bonneau
- Center for Genomics and Systems Biology, New York University , New York, New York 10003, United States.,Courant Institute of Mathematical Sciences, Computer Science Department, New York University , New York, New York 10009, United States.,Center for Computational Biology, Flatiron Institute, Simons Foundation , 162 Fifth Avenue, New York, New York 10010, United States
| | - Jin Kim Montclare
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering , Brooklyn, New York 11201, United States.,Department of Chemistry, New York University , New York, New York 10003, United States.,Department of Biochemistry, SUNY Downstate Medical Center , Brooklyn, New York 11203, United States
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14
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Margul DJ, Park J, Boehler RM, Smith DR, Johnson MA, McCreedy DA, He T, Ataliwala A, Kukushliev TV, Liang J, Sohrabi A, Goodman AG, Walthers CM, Shea LD, Seidlits SK. Reducing neuroinflammation by delivery of IL-10 encoding lentivirus from multiple-channel bridges. Bioeng Transl Med 2016; 1:136-148. [PMID: 27981242 PMCID: PMC5125399 DOI: 10.1002/btm2.10018] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 06/24/2016] [Accepted: 07/01/2016] [Indexed: 12/25/2022] Open
Abstract
The spinal cord is unable to regenerate after injury largely due to growth‐inhibition by an inflammatory response to the injury that fails to resolve, resulting in secondary damage and cell death. An approach that prevents inhibition by attenuating the inflammatory response and promoting its resolution through the transition of macrophages to anti‐inflammatory phenotypes is essential for the creation of a growth permissive microenvironment. Viral gene delivery to induce the expression of anti‐inflammatory factors provides the potential to provide localized delivery to alter the host inflammatory response. Initially, we investigated the effect of the biomaterial and viral components of the delivery system to influence the extent of cell infiltration and the phenotype of these cells. Bridge implantation reduces antigen‐presenting cell infiltration at day 7, and lentivirus addition to the bridge induces a transient increase in neutrophils in the spinal cord at day 7 and macrophages at day 14. Delivery of a lentivirus encoding IL‐10, an anti‐inflammatory factor that inhibits immune cell activation and polarizes the macrophage population towards anti‐inflammatory phenotypes, reduced neutrophil infiltration at both day 7 and day 28. Though IL‐10 lentivirus did not affect macrophages number, it skewed the macrophage population toward an anti‐inflammatory M2 phenotype and altered macrophage morphology. Additionally, IL‐10 delivery resulted in improved motor function, suggesting reduced secondary damage and increased sparing. Taken together, these results indicate that localized expression of anti‐inflammatory factors, such as IL‐10, can modulate the inflammatory response following spinal cord injury, and may be a key component of a combinatorial approach that targets the multiple barriers to regeneration and functional recovery.
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Affiliation(s)
- Daniel J Margul
- Dept. of Biomedical Engineering Northwestern University Evanston IL, 48109; Dept. of Biomedical Engineering University of Michigan Ann Arbor MI, 48109
| | - Jonghyuck Park
- Dept. of Biomedical Engineering University of Michigan Ann Arbor MI, 48109
| | - Ryan M Boehler
- Dept. of Chemical and Biological Engineering Northwestern University Evanston IL, 48109
| | - Dominique R Smith
- Dept. of Biomedical Engineering Northwestern University Evanston IL, 48109; Dept. of Biomedical Engineering University of Michigan Ann Arbor MI, 48109
| | - Mitchell A Johnson
- Dept. of Biomedical Engineering University of Michigan Ann Arbor MI, 48109
| | - Dylan A McCreedy
- Dept. of Biomedical Engineering University of Michigan Ann Arbor MI, 48109; Dept. of Chemical and Biological Engineering Northwestern University Evanston IL, 48109
| | - Ting He
- Dept. of Chemical and Biological Engineering Northwestern University Evanston IL, 48109
| | - Aishani Ataliwala
- Dept. of Bioengineering University of California Los Angeles Los Angeles CA, 90095
| | - Todor V Kukushliev
- Dept. of Chemical and Biological Engineering Northwestern University Evanston IL, 48109
| | - Jesse Liang
- Dept. of Bioengineering University of California Los Angeles Los Angeles CA, 90095
| | - Alireza Sohrabi
- Dept. of Bioengineering University of California Los Angeles Los Angeles CA, 90095
| | - Ashley G Goodman
- Dept. of Chemical and Biological Engineering Northwestern University Evanston IL, 48109
| | | | - Lonnie D Shea
- Dept. of Biomedical Engineering University of Michigan Ann Arbor MI, 48109; Dept. of Chemical Engineering University of Michigan Ann Arbor MI, 48109
| | - Stephanie K Seidlits
- Dept. of Chemical and Biological Engineering Northwestern University EvanstonIL, 48109; Dept. of Bioengineering University of California Los Angeles Los Angeles CA, 90095; Brain Research Institute University of California Los Angeles Los Angeles CA, 90095; Jonsson Comprehensive Cancer Center University of California Los Angeles Los Angeles CA, 90024
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15
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Ergün B, De Cola L, Galla HJ, Kehr NS. Surface-Mediated Stimuli Responsive Delivery of Organic Molecules from Porous Carriers to Adhered Cells. Adv Healthc Mater 2016; 5:1588-92. [PMID: 27114067 DOI: 10.1002/adhm.201600098] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/18/2016] [Indexed: 01/09/2023]
Abstract
The alternating layer-by-layer deposition of oppositely charged polyelectrolytes on fluorescence-dye-(Hst)-loaded zeolites L ((Hst) Zeo-PSS/PLL) is described. The arrays and nanocomposite (NC) hydrogels of (Hst) Zeo-PSS/PLL are prepared. The subsequent cell experiments show the potential application of arrays and NC hydrogels of (Hst) Zeo-PSS/PLL as alternative 2D- and 3D-surfaces, respectively, for 2D- and 3D-surface-mediated controlled organic molecules delivery applications.
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Affiliation(s)
- Bahar Ergün
- Department of Chemistry; Biochemistry Division; Hacettepe University; 06800 Ankara Turkey
| | - Luisa De Cola
- Institut de Science et d'Ingénierie Supramoléculaires; 8 allée Gaspard Monge 67083 Strasbourg France
| | - Hans-Joachim Galla
- Institut für Biochemie; Westfälische Wilhelms-Universität Münster; Wilhelm-Klemm-Str.2 D-48149 Münster Germany
| | - Nermin Seda Kehr
- Physikalisches Institut and CeNTech; Westfälische Wilhelms-Universität Münster; Heisenbergstraße 11 D-48149 Münster Germany
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16
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A drug delivery hydrogel system based on activin B for Parkinson's disease. Biomaterials 2016; 102:72-86. [PMID: 27322960 DOI: 10.1016/j.biomaterials.2016.06.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 05/27/2016] [Accepted: 06/05/2016] [Indexed: 01/01/2023]
Abstract
Parkinson's disease (PD) is one of the most common neurodegenerative diseases. Activins are members of the superfamily of transforming growth factors and have many potential neuroprotective effects. Herein, at the first place, we verified activin B's neuroprotective role in a PD model, and revealed that activin B's fast release has limited function in the PD therapy. To this end, we developed a multi-functional crosslinker based thermosensitive injectable hydrogels to deliver activin B, and stereotactically injected the activin B-loaded hydrogel into the striatum of a mouse model of PD. The histological evaluation showed that activin B can be detected even 5 weeks post-surgery in PD mice implanted with activin B-loaded hydrogels, and activin B-loaded hydrogels can significantly increase the density of tyrosine hydroxylase positive (TH(+)) nerve fibers and reduce inflammatory responses. The behavioral evaluation demonstrated that activin B-loaded hydrogels significantly improved the performance of the mice in the PD model. Meanwhile, we found that hydrogels can slightly induce the activation of microglia cells and astrocytes, while cannot induce apoptosis in the striatum. Overall, our data demonstrated that the developed activin B-loaded hydrogels provide sustained release of activin B for over 5 weeks and contribute to substantial cellular protection and behavioral improvement, suggesting their potential as a therapeutic strategy for PD.
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17
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Gao H, Goriacheva OA, Tarakina NV, Sukhorukov GB. Intracellularly Biodegradable Polyelectrolyte/Silica Composite Microcapsules as Carriers for Small Molecules. ACS APPLIED MATERIALS & INTERFACES 2016; 8:9651-9661. [PMID: 27008032 DOI: 10.1021/acsami.6b01921] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Microcapsules that can be efficiently loaded with small molecules and effectively released at the target area through the degradation of the capsule shells hold great potential for treating diseases. Traditional biodegradable polyelectrolyte (PE) capsules can be degraded by cells and eliminated from the body but fail to encapsulate drugs with small molecular weight. Here, we report a poly-l-arginine hydrochloride (PARG)/dextran sulfate sodium salt (DEXS)/silica (SiO2) composite capsule that can be destructed in cells and of which the in situ formed inorganic SiO2 enables loading of small model molecules, Rhodamine B (Rh-B). The composite capsules were fabricated based on the layer-by-layer (LbL) technique and the hydrolysis of tetraethoxysilane (TEOS). Capsules composed of nondegradable PEs and SiO2, polyllamine hydrochloride (PAH)/poly(sodium 4-styrenesulfonate) (PSS)/silica (the control sample), were prepared and briefly compared with the degradable composite capsules. An intracellular degradation study of both types of composite capsules revealed that PARG/DEXS/silica capsules were degraded into fragments and lead to the release of model molecules in a relatively short time (2 h), while the structure of PAH/PSS/silica capsules remained intact even after 3 days incubation with B50 cells. Such results indicated that the polymer components played a significant role in the degradability of the SiO2. Specifically, PAH/PSS scaffolds blocked the degradation of SiO2. For PARG/DEXS/silica capsules, we proposed the effects of both hydrolytic degradation of amorphous silica and enzymatic degradation of PARG/DEXS polymers as a cell degradation mechanism. All the results demonstrated a new type of functional composite microcapsule with low permeability, good biocompatibility, and biodegradability for potential medical applications.
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Affiliation(s)
- Hui Gao
- School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom
| | - Olga A Goriacheva
- Saratov State University , 83 Astrakhanskaya Street, Saratov 410012, Russia
| | - Nadezda V Tarakina
- School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom
| | - Gleb B Sukhorukov
- School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom
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18
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Getts DR, Shea LD, Miller SD, King NJC. Harnessing nanoparticles for immune modulation. Trends Immunol 2015; 36:419-27. [PMID: 26088391 PMCID: PMC4603374 DOI: 10.1016/j.it.2015.05.007] [Citation(s) in RCA: 162] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 05/15/2015] [Accepted: 05/17/2015] [Indexed: 01/18/2023]
Abstract
NPs can be generated from numerous biocompatible compounds. Specific physiochemical characteristics can be manipulated to modulate the immune response. Severe inflammation can be treated using NP-based approaches. Antigen delivery via NPs can restore peripheral immune tolerance.
Recent approaches using nanoparticles engineered for immune regulation have yielded promising results in preclinical models of disease. The number of nanoparticle therapies is growing, fueled by innovations in nanotechnology and advances in understanding of the underlying pathogenesis of immune-mediated diseases. In particular, recent mechanistic insight into the ways in which nanoparticles interact with the mononuclear phagocyte system and impact its function during homeostasis and inflammation have highlighted the potential of nanoparticle-based therapies for controlling severe inflammation while concurrently restoring peripheral immune tolerance in autoimmune disease. Here we review recent advances in nanoparticle-based approaches aimed at immune-modulation, and discuss these in the context of concepts in polymeric nanoparticle development, including particle modification, delivery and the factors associated with successful clinical deployment.
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Affiliation(s)
- Daniel R Getts
- The Discipline of Pathology, School of Medical Sciences, Bosch Institute, Sydney Medical School, The University of Sydney, Sydney, NSW 2006, Australia; Department of Microbiology-Immunology and Interdepartmental Immunobiology Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA; Cour Pharmaceutical Development Company, Elmhurst, IL, USA.
| | - Lonnie D Shea
- Department of Chemical and Biomedical Engineering, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA; Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor, MI 48109, USA
| | - Stephen D Miller
- Department of Microbiology-Immunology and Interdepartmental Immunobiology Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Nicholas J C King
- The Discipline of Pathology, School of Medical Sciences, Bosch Institute, Sydney Medical School, The University of Sydney, Sydney, NSW 2006, Australia
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19
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Gao Y, Zhu W, Liu J, Di D, Chang D, Jiang T, Wang S. A geometric pore adsorption model for predicting the drug loading capacity of insoluble drugs in mesoporous carbon. Int J Pharm 2015; 485:25-30. [DOI: 10.1016/j.ijpharm.2015.02.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 02/12/2015] [Accepted: 02/23/2015] [Indexed: 12/24/2022]
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20
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Zhang Y, Bartz R, Grigoryan G, Bryant M, Aaronson J, Beck S, Innocent N, Klein L, Procopio W, Tucker T, Jadhav V, Tellers DM, DeGrado WF. Computational design and experimental characterization of peptides intended for pH-dependent membrane insertion and pore formation. ACS Chem Biol 2015; 10:1082-93. [PMID: 25630033 DOI: 10.1021/cb500759p] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
There are many opportunities to use macromolecules, such as peptides and oligonucleotides, for intracellular applications. Despite this, general methods for delivering these molecules to the cytosol in a safe and efficient manner are not available. Efforts to develop a variety of intracellular drug delivery systems such as viral vectors, lipoplexes, nanoparticles, and amphiphilic peptides have been made, but various challenges such as delivery efficiency, toxicity, and controllability remain. A central challenge is the ability to selectively perturb, not destroy, the membrane to facilitate cargo introduction. Herein, we describe our efforts to design and characterize peptides that form pores inside membranes at acidic pH, so-called pH-switchable pore formation (PSPF) peptides, as a potential means for facilitating cargo translocation through membranes. Consistent with pore formation, these peptides exhibit low-pH-triggered selective release of ATP and miRNA, but not hemoglobin, from red blood cells. Consistent with these observations, biophysical studies (tryptophan fluorescence, circular dichroism, size-exclusion chromatography, analytical ultracentrifugation, and attenuated total reflectance Fourier transformed infrared spectroscopy) show that decreased pH destabilizes the PSPF peptides in aqueous systems while promoting their membrane insertion. Together, these results suggest that reduced pH drives insertion of PSPF peptides into membranes, leading to target-specific escape through a proposed pore formation mechanism.
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Affiliation(s)
- Yao Zhang
- Department
of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - René Bartz
- Merck Research Laboratories, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - Gevorg Grigoryan
- Department
of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Michael Bryant
- Department
of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jeff Aaronson
- Merck Research Laboratories, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - Stephen Beck
- Merck Research Laboratories, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - Nathalie Innocent
- Merck Research Laboratories, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - Lee Klein
- Merck Research Laboratories, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - William Procopio
- Merck Research Laboratories, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - Tom Tucker
- Merck Research Laboratories, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - Vasant Jadhav
- Merck Research Laboratories, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - David M. Tellers
- Merck Research Laboratories, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - William F. DeGrado
- Department
of Pharmaceutical Chemistry, University of California−San Francisco, San Francisco, California 94158, United States
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21
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Qodratnama R, Serino LP, Cox HC, Qutachi O, White LJ. Formulations for modulation of protein release from large-size PLGA microparticles for tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 47:230-6. [DOI: 10.1016/j.msec.2014.11.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Revised: 10/15/2014] [Accepted: 11/05/2014] [Indexed: 11/30/2022]
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22
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Chansuna M, Pimpha N, Vao-soongnern V. Mesoscale simulation and experimental studies of self-assembly behavior of a PLA-PEG-PLA triblock copolymer micelle for sustained drug delivery. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0452-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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23
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Chen J, Sheu AY, Li W, Zhang Z, Kim DH, Lewandowski RJ, Omary RA, Shea LD, Larson AC. Poly(lactide-co-glycolide) microspheres for MRI-monitored transcatheter delivery of sorafenib to liver tumors. J Control Release 2014; 184:10-7. [PMID: 24727059 DOI: 10.1016/j.jconrel.2014.04.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 01/25/2014] [Accepted: 04/02/2014] [Indexed: 12/13/2022]
Abstract
The multi-kinase inhibitor (MKI) sorafenib can be an effective palliative therapy for patients with hepatocellular carcinoma (HCC). However, patient tolerance is often poor due to common systemic side effects following oral administration. Local transcatheter delivery of sorafenib to liver tumors has the potential to reduce systemic toxicities while increasing the dose delivered to targeted tumors. We developed sorafenib-eluting PLG microspheres for delivery by intra-hepatic transcatheter infusion in an orthotropic rodent HCC model. The particles also encapsulated iron-oxide nanoparticles permitting magnetic resonance imaging (MRI) of intra-hepatic biodistributions. The PLG microspheres (diameter≈1μm) were loaded with 18.6% (w/w) sorafenib and 0.54% (w/w) ferrofluid and 65.2% of the sorafenib was released within 72h of media exposure. In vitro studies demonstrated significant reductions in HCC cell proliferation with increasing doses of the sorafenib-eluting microspheres, where the estimated IC50 was a 29μg/mL dose of microspheres. During in vivo studies, MRI permitted intra-procedural visualization of intra-hepatic microsphere delivery. At 72h after microsphere infusion, microvessel density was significantly reduced in tumors treated with the sorafenib-eluting microspheres compared to both sham control tumors (by 35%) and controls (by 30%). These PLG microspheres offer the potential to increase the efficacy of molecularly targeted MKI therapies while reducing systemic exposures via selective catheter-directed delivery to HCC.
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Affiliation(s)
- Jeane Chen
- Department of Chemical & Biological Engineering, Northwestern University, Evanston, IL, USA; Department of Radiology, Northwestern University, Chicago, IL, USA
| | - Alexander Y Sheu
- Department of Radiology, Northwestern University, Chicago, IL, USA
| | - Weiguo Li
- Department of Radiology, Northwestern University, Chicago, IL, USA
| | - Zhuoli Zhang
- Department of Radiology, Northwestern University, Chicago, IL, USA; Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, IL, USA
| | - Dong-Hyun Kim
- Department of Radiology, Northwestern University, Chicago, IL, USA
| | - Robert J Lewandowski
- Department of Radiology, Northwestern University, Chicago, IL, USA; Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, IL, USA
| | - Reed A Omary
- Department of Radiology, Northwestern University, Chicago, IL, USA; Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, IL, USA; Department of Biomedical Engineering, Northwestern University, Chicago, IL, USA
| | - Lonnie D Shea
- Department of Chemical & Biological Engineering, Northwestern University, Evanston, IL, USA; Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, IL, USA
| | - Andrew C Larson
- Department of Radiology, Northwestern University, Chicago, IL, USA; Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, IL, USA; Department of Biomedical Engineering, Northwestern University, Chicago, IL, USA; Department of Electrical Engineering and Computer Science, Evanston, IL, USA.
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24
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Yan J, Yang S, Sun H, Guo D, Wu B, Ji F, Zhou D. Effects of releasing recombinant human growth and differentiation factor-5 from poly(lactic-co-glycolic acid) microspheres for repair of the rat degenerated intervertebral disc. J Biomater Appl 2013; 29:72-80. [DOI: 10.1177/0885328213515034] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Purpose: The objective of this study was to investigate the therapeutic potential of poly(lactic- co-glycolic acid) (PLGA) microspheres loaded with recombinant human growth and differentiation factor-5 (rhGDF-5) on the disc degeneration induced by needle puncture in a rat caudal disc model. Methods: The rhGDF-5-loaded PLGA microspheres were prepared by the water-oil-water double-emulsion solvent evaporation method, and release kinetics was determined over 42 days. Rats that underwent 21-G needle puncture at rat tail discs were injected with rhGDF-5/PLGA microspheres at four weeks after needle injury. At eight weeks after the injection, disc height, glycosaminoglycans content, and DNA content of the discs were evaluated. In addition, gene expression analysis of aggrecan, collagen type I, and collagen type II in the rat nucleus pulposus was measured by real-time polymerase chain reaction. Rat discs were also assessed by histology using hematoxylin and eosin stain. Results: Encapsulation of rhGDF-5 in PLGA microspheres guaranteed a sustained release of active rhGDF-5 for more than 42 days. The injection of GDF-5/PLGA microspheres resulted in a statistically significant restoration of disc height ( p < 0.01), improvement of sulfated glycosaminoglycan ( p < 0.05), DNA content ( p < 0.05), and significantly increased mRNA levels of collagen type II ( p < 0.01), and the differentiation index (the ratio of collagen type II to collagen type I, p < 0.01). In addition, rhGDF-5/PLGA microspheres treatment also improved histological changes induced by needle puncture. Conclusions: The results of this study suggest that injection of rhGDF-5 loaded in PLGA microspheres into rat tail discs may be as a promising therapy strategy to regenerate or repair the degenerative disc.
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Affiliation(s)
- Jihong Yan
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Shu Yang
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Huaimei Sun
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Duo Guo
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Bo Wu
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Fengqing Ji
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Deshan Zhou
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
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25
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Palus S, von Haehling S, Doehner W, Datta R, Zhang J, Dong JZ, Culler MD, Anker SD, Springer J. Effect of application route of the ghrelin analog BIM-28131 (RM-131) on body weight and body composition in a rat heart failure model. Int J Cardiol 2013; 168:2369-74. [PMID: 23465234 DOI: 10.1016/j.ijcard.2013.01.263] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Revised: 01/15/2013] [Accepted: 01/20/2013] [Indexed: 12/30/2022]
Abstract
Chronic heart failure (CHF) remains one of the most challenging diseases in terms of numbers and disease management, particularly so, if the CHF patient develops cardiac cachexia. Ghrelin and its analogs have been suggested to improve body weight and cardiac function in heart failure models and exploratory human clinical studies. However, most ghrelin compounds are peptides and need to be injected several times per day, which affects the quality of life of patients. Here, we compared two application routes, three times daily subcutaneous (sc) injections to continuous infusion using osmotic mini-pumps in a rat model of CHF. Moreover, the effects were also compared to three times daily sc injections of growth hormone (GH). Rats were treated for 28 d. The results show that treatment with 50 or 100 nmol/kg/d BIM-28131 (RM-131) potently induces body weight gain, fat and lean mass compared to placebo. The gain of lean mass was equal to the gain of lean mass in the 2mg/kg/d GH group and superior to 250 μg/kg/d GH. Both GH and BIM-28131 increased levels of insulin-like growth factor-1 to a similar extent. Little effect was seen on cardiac function; only cardiac output was improved by either high dose BIM-28131 or GH. Overall the effects of BIM-28131 were similar in both application routes.
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Affiliation(s)
- Sandra Palus
- Applied Cachexia Research, Dept. of Cardiology, Charité Medical School, Berlin, Germany; Center for Cardiovascular Research, Charité Medical School, Berlin, Germany
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26
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Wang Y, Yang X, Liu W, Zhang F, Cai Q, Deng X. Controlled release behaviour of protein-loaded microparticles prepared via coaxial or emulsion electrospray. J Microencapsul 2013; 30:490-7. [PMID: 23346923 PMCID: PMC3709885 DOI: 10.3109/02652048.2012.752537] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Biodegradable poly (lactic-co-glycolic acid) (PLGA) microparticles are an effective way to achieve sustained drug release. In this study, we investigated a sustained release model of PLGA microparticles with incorporated protein via either emulsion or coaxial electrospray techniques. PLGA (75:25) was used as the carrier, and bovine serum albumin as a model protein. Coaxial electrospray resulted in a type of core-shell structure with mean diameters of 2.41 ± 0.60 µm and a centralised protein distribution within the core. Emulsion electrospray formed bigger microparticles with mean diameters of 22.75 ± 8.05 µm and a heterogeneous protein distribution throughout the microparticles. The coaxial electrospray microparticles presented a much slighter burst release than the emulsion electrospray microparticles. Loading efficiency was significantly higher (p < 0.05) in the coaxial group than emulsion group. This indicated that both emulsion and coaxial electrospray could produce protein-loaded microparticles with sustained release behaviour, but the former revealed a superior approach for drug delivery.
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Affiliation(s)
- Ying Wang
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China
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27
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Lim MPA, Lee WL, Widjaja E, Loo SCJ. One-step fabrication of core–shell structured alginate–PLGA/PLLA microparticles as a novel drug delivery system for water soluble drugs. Biomater Sci 2013; 1:486-493. [DOI: 10.1039/c3bm00175j] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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28
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Karal-Yilmaz O, Ozkan A, Akgun E, Kukut M, Baysal K, Avsar T, Kilic T. Controlled release of imatinib mesylate from PLGA microspheres inhibit craniopharyngioma mediated angiogenesis. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:147-153. [PMID: 23053813 DOI: 10.1007/s10856-012-4784-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 09/27/2012] [Indexed: 06/01/2023]
Abstract
Poly(lactic-co-glycolic acid) microspheres loaded with imatinib mesylate has been developed as a new therapeutic strategy to prevent craniopharyngioma recurrence. Microspheres composed of different lactic/glycolic acid ratios, molecular weights and drug compositions were synthesized and loaded with imatinib mesylate by modified double-emulsion/solvent evaporation technique and subsequently characterized by particle-size distribution, scanning electron microscopy, encapsulation efficiency and in vitro drug release. Inhibitory potential of imatinib containing microspheres on tumor neovascularization was investigated on craniopharyngioma tumor samples by rat cornea angiogenesis assay. Results showed that microspheres in different LA:GA ratios [LA:GA 50:50 (G50), 75:25 (G25), 85:15 (G15)] considerably reduced neovascularization induced by recurrent tumor samples in an in vivo angiogenesis assay (P < 0.01). Our data indicate that local delivery of imatinib mesylate to the post-surgical tumoral cavity using biodegradable microspheres may be a promising biologically selective approach to prevent the recurrence of craniopharyngiomas, via inhibition of neovascularization.
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Affiliation(s)
- Oksan Karal-Yilmaz
- TUBITAK, Marmara Research Center, Genetic Engineering and Biotechnology Institute, Gebze-Kocaeli, Turkey.
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Solorio LD, Vieregge EL, Dhami CD, Alsberg E. High-density cell systems incorporating polymer microspheres as microenvironmental regulators in engineered cartilage tissues. TISSUE ENGINEERING PART B-REVIEWS 2012; 19:209-20. [PMID: 23126333 DOI: 10.1089/ten.teb.2012.0252] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
To address the significant clinical need for tissue-engineered therapies for the repair and regeneration of articular cartilage, many systems have recently been developed using bioactive polymer microspheres as regulators of the chondrogenic microenvironment within high-density cell cultures. In this review, we highlight various densely cellular systems utilizing polymer microspheres as three-dimensional (3D) structural elements within developing engineered cartilage tissue, carriers for cell expansion and delivery, vehicles for spatiotemporally controlled growth factor delivery, and directors of cell behavior via regulation of cell-biomaterial interactions. The diverse systems described herein represent a shift from the more traditional tissue engineering approach of combining cells and growth factors within a biomaterial scaffold, to the design of modular systems that rely on the assembly of cells and bioactive polymer microspheres as building blocks to guide the creation of articular cartilage. Cell-based assembly of 3D microsphere-incorporated structures represents a promising avenue for the future of tissue engineering.
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Affiliation(s)
- Loran D Solorio
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA
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Atkinson JL, Vyazovkin S. Thermal Properties and Degradation Behavior of Linear and Branched Poly(L-lactide)s and Poly(L-lactide-co-glycolide)s. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201100681] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Phelps J, Bentley MVL, Lopes LB. In situ gelling hexagonal phases for sustained release of an anti-addiction drug. Colloids Surf B Biointerfaces 2011; 87:391-8. [DOI: 10.1016/j.colsurfb.2011.05.048] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 05/16/2011] [Accepted: 05/25/2011] [Indexed: 10/18/2022]
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Atkinson JL, Vyazovkin S. Non-oxidative Thermal Degradation of Poly(glycidol), Poly(glycidol)-g-L
-lactide, and Poly(glycidol)-g-glycolide. MACROMOL CHEM PHYS 2011. [DOI: 10.1002/macp.201100243] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Tshikhudo N, Pretorius A, Putterill J, van Kleef M. Preparation and in vitro characterisation of Ehrlichia ruminantium plasmid DNA and proteins encapsulated into and DNA adsorbed onto biodegradable microparticles. Ticks Tick Borne Dis 2011; 1:186-93. [PMID: 21771527 DOI: 10.1016/j.ttbdis.2010.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 08/05/2010] [Accepted: 08/06/2010] [Indexed: 11/28/2022]
Abstract
Four E. ruminantium 1H12 open reading frames and their proteins known to protect sheep against heartwater needle challenge were encapsulated into, or adsorbed onto poly(d,l-lactide-co-glycolide) microparticles. Microspheres with smooth surface and smaller than 5 μm diameters were produced, with high adsorption and encapsulation efficiencies. Gel electrophoresis showed that neither encapsulation nor adsorption affected the stability of the DNA or proteins. Cationic microparticles released ∼40% of plasmid DNA on day 1 while PLGA 50:50-COOH microparticles co-encapsulating plasmid DNA and polyvinyl alcohol only started to release from days 12-28. Recombinant proteins were released from PLGA 85:15 and homopolymer R 203 S microparticles in a biphasic manner with a high initial burst release (∼45-80%). In contrast, PLGA 50:50 microparticles had low (15-65%) initial burst release followed by (25-80%) release by days (days 28-42). A cocktail of these microparticles could therefore be used as single-dose auto-booster vaccine.
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Abstract
Polydepsipeptides - alternating copolymers of an alpha-amino acid and an alpha-hydroxy acid - are a group of biodegradable polymers. Versatile polydepsipeptides with or without pendant functional groups, as well as various polymer architectures, for example, providing alternative, random, diblock, triblock, multiblock or graft sequence structures, can be synthesized via ring-opening copolymerization of various morpholine-2,5-dione derivatives. They are potential candidates for a wide range of biomedical applications. Polydepsipeptides are described in this review from the aspect of materials science, especially as biomaterials. We mainly focus on various techniques developed to synthesize polydepsipeptides and their copolymers, biodegradation behaviors, shape-memory properties and possible biomedical applications.
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Affiliation(s)
- Yakai Feng
- School of Chemical Engineering and Technology, Tianjin University, Weijin Road 92, 300072 Tianjin, China.
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Yang DY, Chen YJ, Wang MF, Pan HC, Chen SY, Cheng FC. Granulocyte colony-stimulating factor enhances cellular proliferation and motor function recovery on rats subjected to traumatic brain injury. Neurol Res 2010; 32:1041-9. [PMID: 20810026 DOI: 10.1179/016164110x12807570510013] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Traumatic brain injury (TBI) results in neurological dysfunction and death through primary or secondary mechanisms. Here, we evaluated the effect of osmotic pump delivery of granulocyte colony-stimulating factor (G-CSF) on the histopathology and motor function recovery of rats after experimental TBI. METHODS Sprague-Dawley rats were used as experimental model by fluid percussion device to cause brain injury on the motor cortex area. The rats were simultaneously subjected to TBI and were implanted of min-osmotic pump containing recombinant human G-CSF (300 μg/700 μl) via intraperitoneal injection. Motor function was assessed by rotarod test. 5-bromo-2'-deoxyuridine (BrdU) was used to label the proliferating cells and their differentiation was evaluated by histology and immunohistochemistry. RESULTS The G-CSF group showed significantly better motor function recovery than the control group, and the effect lasted up to 14 days after TBI. Moreover, the G-CSF group exhibited a greater increase in the number of BrdU-positive cells compared with the control group. The G-CSF group also had a significantly higher number of DCX-positive cells in the ipsilateral subventricular zone (SVZ) than the control group. CONCLUSIONS These data suggest that the beneficial effect of delivering G-CSF via an osmotic pump may improve the motor function and enhance neurogenesis in the SVZ of the injured brain.
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Affiliation(s)
- Dar-Yu Yang
- Department of Neurosurgery, Chang Bing Chwan Memorial Hospital, Changhua, Taiwan
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Körber M. PLGA Erosion: Solubility- or Diffusion-Controlled? Pharm Res 2010; 27:2414-20. [DOI: 10.1007/s11095-010-0232-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Accepted: 07/27/2010] [Indexed: 10/19/2022]
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Teicoplanin-loaded borate bioactive glass implants for treating chronic bone infection in a rabbit tibia osteomyelitis model. Biomaterials 2010; 31:5865-74. [DOI: 10.1016/j.biomaterials.2010.04.005] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Accepted: 04/01/2010] [Indexed: 11/21/2022]
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Soderquist RG, Mahoney MJ. Central nervous system delivery of large molecules: challenges and new frontiers for intrathecally administered therapeutics. Expert Opin Drug Deliv 2010; 7:285-93. [PMID: 20201735 DOI: 10.1517/17425240903540205] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
IMPORTANCE OF THE FIELD Therapeutic proteins and DNA constructs offer promise for the treatment of central nervous system disorders, yet significant biological barriers limit the ability of these molecules to reach the central nervous system from the bloodstream. Direct administrations to the cerebrospinal fluid (intrathecal administration) comprise an emerging field to facilitate the efficient delivery of these biological macromolecules to central nervous system tissues. AREAS COVERED IN THIS REVIEW Previous reports from 1990 to the present time describing the interactions and turnover of the cerebrospinal fluid within the intrathecal space, characterizations of the effects that therapeutic proteins and DNA have shown after intrathecal delivery through a lumbar route, and reports of emerging technologies to address the limitations of intrathecally administered macromolecules are reviewed. WHAT THE READER WILL GAIN This review provides an overview of the limitations that must be overcome for intrathecally administered biological macromolecules and the recent advances and promising approaches for surmounting these limitations. TAKE HOME MESSAGE Emerging approaches that stabilize and sustain the delivery of intrathecally administered biological macromolecules may enhance substantially the clinical relevance of promising therapeutic proteins and DNA constructs for the treatment of various central nervous system disorders.
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Affiliation(s)
- Ryan G Soderquist
- University of Colorado at Boulder, Department of Chemical and Biological Engineering, 424 UCB, Boulder, CO 80309, USA
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Salvay DM, Zelivyanskaya M, Shea LD. Gene delivery by surface immobilization of plasmid to tissue-engineering scaffolds. Gene Ther 2010; 17:1134-41. [PMID: 20485383 PMCID: PMC2927809 DOI: 10.1038/gt.2010.79] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Biomaterial scaffolds that serve as vehicles for gene delivery to promote expression of inductive factors have numerous regenerative medicine applications. In this report, we investigate plasmid delivery from biomaterial scaffolds using a surface immobilization strategy. Porous scaffolds were fabricated from poly(D,L-lactide-co-glycolide) (PLG), and plasmids were immobilized by drying. In vitro plasmid release indicated that the majority (>70%) of adsorbed plasmids were released within 24 h and >98% within 3 days; however, in vivo implantation of the scaffolds at the subcutaneous site yielded transgene expression that persisted for at least 28 weeks and was localized to the site of implantation. Histological analysis of DNA-adsorbed scaffolds indicated that macrophages at the scaffold were transfected in the first 2 weeks after implantation, whereas muscle cells adjacent to the implant primarily expressed the transgene at 4 weeks. In addition to localized gene expression, a secreted protein (human factor IX) was retained at the implant site and not available systemically after 3 days, indicating minimal off-target effects. These findings show that surface immobilization of plasmid onto microporous PLG scaffolds can produce localized and long-term gene expression in vivo, which may be used to enhance the bioactivity of scaffolds used for regenerative medicine.
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Affiliation(s)
- D M Salvay
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL 60208-3120, USA
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Chung Y, Kim J, Sah H. Reactivity of ethyl acetate and its derivatives toward ammonolysis: ramifications for ammonolysis-based microencapsulation process. POLYM ADVAN TECHNOL 2009. [DOI: 10.1002/pat.1329] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Peptides that mimic the amino-terminal end of the rabies virus phosphoprotein have antiviral activity. J Virol 2009; 83:10808-20. [PMID: 19706704 DOI: 10.1128/jvi.00977-09] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
We wanted to develop a therapeutic approach against rabies disease by targeting the lyssavirus transcription/replication complex. Because this complex (nucleoprotein N-RNA template processed by the L polymerase and its cofactor, the phosphoprotein P) is similar to that of other negative-strand RNA viruses, we aimed to design broad-spectrum antiviral drugs that could be used as a complement to postexposure vaccination and immunotherapy. Recent progress in understanding the structure/function of the rabies virus P, N, and L proteins predicts that the amino-terminal end of P is an excellent target for destabilizing the replication complex because it interacts with both L (for positioning onto the N-RNA template) and N (for keeping N soluble, as needed for viral RNA encapsidation). Thus, peptides mimicking various lengths of the amino-terminal end of P have been evaluated, as follows: (i) for binding properties to the N-P-L partners by the two-hybrid method; (ii) for their capacity to inhibit the transcription/replication of a rabies virus minigenome encoding luciferase in BHK-21-T7 cells; and (iii) for their capacity to inhibit rabies virus infection of BHK-21-T7 cells and of two derivatives of the neuronal SK-N-SH cell line. Peptides P60 and P57 (the first 60 and first 57 NH2 residues of P, respectively) exhibited a rapid, strong, and long-lasting inhibitory potential on luciferase expression (>95% from 24 h to 55 h). P42 was less efficient in its inhibition level (75% for 18 to 30 h) and duration (40% after 48 h). The most promising peptides were synthesized in tandem with the Tat sequence, allowing cell penetration. Their inhibitory effects were observed on BHK-21-T7 cells infected with rabies virus and Lagos bat virus but not with vesicular stomatitis virus. In neuronal cells, a significant inhibition of both nucleocapsid inclusions and rabies virus release was observed.
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Calancie B, Madsen PW, Wood P, Marcillo AE, Levi AD, Bunge RP. A guidance channel seeded with autologous Schwann cells for repair of cauda equina injury in a primate model. J Spinal Cord Med 2009; 32:379-88. [PMID: 19777858 PMCID: PMC2830676 DOI: 10.1080/10790268.2009.11754411] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND/OBJECTIVE To evaluate an implantable guidance channel (GC) seeded with autologous Schwann cells to promote regeneration of transected spinal nerve root axons in a primate model. METHODS Schwann cells were obtained from sural nerve segments of monkeys (Macaca fascicularis; cynomolgus). Cells were cultured, purified, and seeded into a PAN/PVC GC. Approximately 3 weeks later, monkeys underwent laminectomy and dural opening. Nerve roots of the L4 through L7 segments were identified visually. The threshold voltage needed to elicit hindlimb muscle electromyography (EMG) after stimulation of intact nerve roots was determined. Segments of 2 or 3 nerve roots (each approximately 8-15 mm in length) were excised. The GC containing Schwann cells was implanted between the proximal and distal stumps of these nerve roots and attached to the stumps with suture. Follow-up evaluation was conducted on 3 animals, with survival times of 9 to 14 months. RESULTS Upon reexposure of the implant site, subdural nerve root adhesions were noted in all 3 animals. Several of the implanted GC had collapsed and were characterized by thin strands of connective tissue attached to either end. In contrast, 3 of the 8 implanted GC were intact and had white, glossy cables entering and exiting the conduits. Electrical stimulation of the tissue cable in each of these 3 cases led to low-threshold evoked EMG responses, suggesting that muscles had been reinnervated by axons regenerating through the repair site and into the distal nerve stump. During harvesting of the GC implant, sharp transection led to spontaneous EMG in the same 3 roots showing a low threshold to electrical stimulation, whereas no EMG was seen when harvesting nerve roots with high thresholds to elicit EMG. Histology confirmed large numbers of myelinated axons at the midpoint of 2 GC judged to have reinnervated target muscles. CONCLUSIONS We found a modest rate of successful regeneration and muscle reinnervation after treatment of nerve root transection with a Schwann cell-seeded, implanted synthetic GC. Newer treatments, which include the use of absorbable polymers, neurotrophins, and antiscar agents, may further improve spinal nerve regeneration for repair of cauda equina injury.
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Affiliation(s)
- Blair Calancie
- Department of Neurosurgery, SUNY Upstate Medical University, 750 E. Adams Street, IHP #1213, Syracuse, NY 13210, USA.
| | - Parley W Madsen
- 1SUNY Upstate Medical University, Syracuse, New York; 2Kaweah Neurological Surgery Associates, Visalia, California; 3University of Miami, Miami, Florida
| | - Patrick Wood
- 1SUNY Upstate Medical University, Syracuse, New York; 2Kaweah Neurological Surgery Associates, Visalia, California; 3University of Miami, Miami, Florida
| | - Alexander E Marcillo
- 1SUNY Upstate Medical University, Syracuse, New York; 2Kaweah Neurological Surgery Associates, Visalia, California; 3University of Miami, Miami, Florida
| | - Allan D Levi
- 1SUNY Upstate Medical University, Syracuse, New York; 2Kaweah Neurological Surgery Associates, Visalia, California; 3University of Miami, Miami, Florida
| | - Richard P Bunge
- 1SUNY Upstate Medical University, Syracuse, New York; 2Kaweah Neurological Surgery Associates, Visalia, California; 3University of Miami, Miami, Florida
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Taylor J, Taylor JR, Belton PS, Minnaar A. Formation of kafirin microparticles by phase separation from an organic acid and their characterisation. J Cereal Sci 2009. [DOI: 10.1016/j.jcs.2009.03.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wood MD, Moore AM, Hunter DA, Tuffaha S, Borschel GH, Mackinnon SE, Sakiyama-Elbert SE. Affinity-based release of glial-derived neurotrophic factor from fibrin matrices enhances sciatic nerve regeneration. Acta Biomater 2009; 5:959-68. [PMID: 19103514 PMCID: PMC2678870 DOI: 10.1016/j.actbio.2008.11.008] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Revised: 10/20/2008] [Accepted: 11/19/2008] [Indexed: 12/13/2022]
Abstract
Glial-derived neurotrophic factor (GDNF) promotes both sensory and motor neuron survival. The delivery of GDNF to the peripheral nervous system has been shown to enhance regeneration following injury. In this study, we evaluated the effect of affinity-based delivery of GDNF from a fibrin matrix in a nerve guidance conduit on nerve regeneration in a 13 mm rat sciatic nerve defect. Seven experimental groups were evaluated which received GDNF or nerve growth factor (NGF) with the delivery system within the conduit, control groups excluding one or more components of the delivery system, and nerve isografts. Nerves were harvested 6 weeks after treatment for analysis by histomorphometry and electron microscopy. The use of the delivery system (DS) with either GDNF or NGF resulted in a higher frequency of nerve regeneration vs. control groups, as evidenced by a neural structure spanning the 13 mm gap. The GDNF DS and NGF DS groups were also similar to the nerve isograft group in measures of nerve fiber density, percent neural tissue and myelinated area measurements, but not in terms of total fiber counts. In addition, both groups contained a significantly greater percentage of larger diameter fibers, with GDNF DS having the largest in comparison to all groups, suggesting more mature neural content. The delivery of GDNF via the affinity-based delivery system can enhance peripheral nerve regeneration through a silicone conduit across a critical nerve gap and offers insight into potential future alternatives to the treatment of peripheral nerve injuries.
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Affiliation(s)
- Matthew D. Wood
- Department of Biomedical Engineering, Washington University, Campus Box 1097, One Brookings Drive, St. Louis, MO 63130, USA
| | - Amy M. Moore
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Daniel A. Hunter
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Sami Tuffaha
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Gregory H. Borschel
- Department of Biomedical Engineering, Washington University, Campus Box 1097, One Brookings Drive, St. Louis, MO 63130, USA
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Susan E. Mackinnon
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Shelly E. Sakiyama-Elbert
- Department of Biomedical Engineering, Washington University, Campus Box 1097, One Brookings Drive, St. Louis, MO 63130, USA
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, MO 63110, USA
- Center for Materials Innovation, Washington University, Campus Box 1105, One Brookings Drive, St. Louis, MO 63130, USA
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Hu CH, Zhang L, Wu DQ, Cheng SX, Zhang XZ, Zhuo RX. Heparin-modified PEI encapsulated in thermosensitive hydrogels for efficient gene delivery and expression. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b817956e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sibeko B, Pillay V, Choonara YE, Khan RA, Modi G, Iyuke SE, Naidoo D, Danckwerts MP. Computational molecular modeling and structural rationalization for the design of a drug-loaded PLLA/PVA biopolymeric membrane. Biomed Mater 2008; 4:015014. [DOI: 10.1088/1748-6041/4/1/015014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Katz JS, Burdick JA. Hydrogel mediated delivery of trophic factors for neural repair. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2008; 1:128-139. [DOI: 10.1002/wnan.10] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Joshua S. Katz
- Department of Bioengineering, University of Pennsylvania, 240 Skirkanich Hall, 210 S. 33rd Street, Philadelphia, PA 19104, USA
| | - Jason A. Burdick
- Department of Bioengineering, University of Pennsylvania, 240 Skirkanich Hall, 210 S. 33rd Street, Philadelphia, PA 19104, USA
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Hendricks JL, Chikar JA, Crumling MA, Raphael Y, Martin DC. Localized cell and drug delivery for auditory prostheses. Hear Res 2008; 242:117-31. [PMID: 18573323 DOI: 10.1016/j.heares.2008.06.003] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2007] [Revised: 05/09/2008] [Accepted: 06/02/2008] [Indexed: 12/20/2022]
Abstract
Localized cell and drug delivery to the cochlea and central auditory pathway can improve the safety and performance of implanted auditory prostheses (APs). While generally successful, these devices have a number of limitations and adverse effects including limited tonal and dynamic ranges, channel interactions, unwanted stimulation of non-auditory nerves, immune rejection, and infections including meningitis. Many of these limitations are associated with the tissue reactions to implanted auditory prosthetic devices and the gradual degeneration of the auditory system following deafness. Strategies to reduce the insertion trauma, degeneration of target neurons, fibrous and bony tissue encapsulation, and immune activation can improve the viability of tissue required for AP function as well as improve the resolution of stimulation for reduced channel interaction and improved place-pitch and level discrimination. Many pharmaceutical compounds have been identified that promote the viability of auditory tissue and prevent inflammation and infection. Cell delivery and gene therapy have provided promising results for treating hearing loss and reversing degeneration. Currently, many clinical and experimental methods can produce extremely localized and sustained drug delivery to address AP limitations. These methods provide better control over drug concentrations while eliminating the adverse effects of systemic delivery. Many of these drug delivery techniques can be integrated into modern auditory prosthetic devices to optimize the tissue response to the implanted device and reduce the risk of infection or rejection. Together, these methods and pharmaceutical agents can be used to optimize the tissue-device interface for improved AP safety and effectiveness.
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Affiliation(s)
- Jeffrey L Hendricks
- Department of Biomedical Engineering, The University of Michigan, 1107 Gerstacker Building, 2200 Bonisteel Boulevard, Ann Arbor, MI 48109-2099, USA.
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Pfister LA, Alther E, Papaloïzos M, Merkle HP, Gander B. Controlled nerve growth factor release from multi-ply alginate/chitosan-based nerve conduits. Eur J Pharm Biopharm 2008; 69:563-72. [DOI: 10.1016/j.ejpb.2008.01.014] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2007] [Revised: 12/21/2007] [Accepted: 01/15/2008] [Indexed: 11/28/2022]
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Ražem D, Katušin-Ražem B. The effects of irradiation on controlled drug delivery/controlled drug release systems. Radiat Phys Chem Oxf Engl 1993 2008. [DOI: 10.1016/j.radphyschem.2007.06.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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