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Wu Z, Chen L, Guo W, Wang J, Ni H, Liu J, Jiang W, Shen J, Mao C, Zhou M, Wan M. Oral mitochondrial transplantation using nanomotors to treat ischaemic heart disease. NATURE NANOTECHNOLOGY 2024:10.1038/s41565-024-01681-7. [PMID: 38802669 DOI: 10.1038/s41565-024-01681-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 04/15/2024] [Indexed: 05/29/2024]
Abstract
Mitochondrial transplantation is an important therapeutic strategy for restoring energy supply in patients with ischaemic heart disease (IHD); however, it is limited by the invasiveness of the transplantation method and loss of mitochondrial activity. Here we report successful mitochondrial transplantation by oral administration for IHD therapy. A nitric-oxide-releasing nanomotor is modified on the mitochondria surface to obtain nanomotorized mitochondria with chemotactic targeting ability towards damaged heart tissue due to nanomotor action. The nanomotorized mitochondria are packaged in enteric capsules to protect them from gastric acid erosion. After oral delivery the mitochondria are released in the intestine, where they are quickly absorbed by intestinal cells and secreted into the bloodstream, allowing delivery to the damaged heart tissue. The regulation of disease microenvironment by the nanomotorized mitochondria can not only achieve rapid uptake and high retention of mitochondria by damaged cardiomyocytes but also maintains high activity of the transplanted mitochondria. Furthermore, results from animal models of IHD indicate that the accumulated nanomotorized mitochondria in the damaged heart tissue can regulate cardiac metabolism at the transcriptional level, thus preventing IHD progression. This strategy has the potential to change the therapeutic strategy used to treat IHD.
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Affiliation(s)
- Ziyu Wu
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Lin Chen
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China
| | - Wenyan Guo
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China
| | - Jun Wang
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, Clinical College of Nanjing University of Chinese Medicine, Nanjing, China
| | - Haiya Ni
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, Clinical College of Nanjing University of Chinese Medicine, Nanjing, China
| | - Jianing Liu
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, Clinical College of Nanjing University of Chinese Medicine, Nanjing, China
| | - Wentao Jiang
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Jian Shen
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China
| | - Chun Mao
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China.
| | - Min Zhou
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China.
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, Clinical College of Nanjing University of Chinese Medicine, Nanjing, China.
| | - Mimi Wan
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China.
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2
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Coolich MK, Lanier OL, Cisneros E, Peppas NA. PEGylated insulin loaded complexation hydrogels for protected oral delivery. J Control Release 2023; 364:216-226. [PMID: 37890591 DOI: 10.1016/j.jconrel.2023.10.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 08/30/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023]
Abstract
While a number of enteric coatings and pH-sensitive oral delivery vehicles have been developed, they lack the ability to sufficiently protect proteins from proteolytic degradation once released from the carrier. In this work, we show that H-bonded, pH-sensitive poly(methacrylic acid-grafted ethylene glycol) glycol (henceforth designated as P(MAA-g-EG) gels) exhibit great promise as protein carriers, as they utilize poly(ethylene glycol) (PEG) chains to promote mucoadhesion in the small intestine, increasing the chances that the drug is released within the villus of the absorptive intestinal wall. Importantly, PEG was also conjugated to the B29-lysine (LysB29) position of insulin in order to protect the drug from proteolytic degradation once released in the small intestine and adhere the drug to the intestinal epithelium through improved mucoadhesion. PEG-conjugated (PEGylated) molecules were found to actively participate in the carrier loading and release mechanism, with the drug conjugate hydrogen bonding to the MAA while in the collapsed state and subsequently repulse the drug above the polymer's isoelectric point. This effect was enhanced through the evaluation of PEG graft density within the carrier. Cellular transport and changes in transepithelial resistance caused by the PEGylated insulin (PI) in the presence of P(MAA-g-EG) microparticles were analyzed using a 1:1 co-culture of human colon adenocarcinoma (Caco-2) and: the mucus-secreting human colon carcinoma cell(HT-29-MTX). Finally, the in vivo absorption of insulin was measured in Sprague-Dawley rats to ensure that the PEGylated insulin conjugates are biologically active, as well as to compare the bioavailability to control insulin. Collectively, these results lead toward the development of a novel system for improved insulin delivery, with improved stability of insulin through PEGylation.
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Affiliation(s)
| | - Olivia L Lanier
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA; Institute of Biomaterials, Drug Delivery, and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA
| | - Ethan Cisneros
- Institute of Biomaterials, Drug Delivery, and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA; McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, TX, USA
| | - Nicholas A Peppas
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA; Institute of Biomaterials, Drug Delivery, and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA; McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, TX, USA; Department of Surgery and Perioperative Care, Dell Medical School, University of Texas at Austin, Austin, TX, USA; Department of Pediatrics, Dell Medical School, University of Texas at Austin, Austin, TX, USA; Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX, USA.
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3
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Pourmadadi M, Farokh A, Rahmani E, Eshaghi MM, Aslani A, Rahdar A, Ferreira LFR. Polyacrylic acid mediated targeted drug delivery nano-systems: A review. J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2023.104169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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4
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Ibrahim S, Hasanin M, Ahmed HY, Abdellatif FHH. Poly(amidoamine)/cellulose based bio-composites as potential anticancer bio-compatible polymers. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03910-8] [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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5
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Li M, He X, Zhao R, Shi Q, Nian Y, Hu B. Hydrogels as promising carriers for the delivery of food bioactive ingredients. Front Nutr 2022; 9:1006520. [PMID: 36238460 PMCID: PMC9551458 DOI: 10.3389/fnut.2022.1006520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/12/2022] [Indexed: 11/13/2022] Open
Abstract
The burden of public health challenges associated with the western dietary and living style is growing. Nutraceuticals have been paid increasing attentions due to their effects in promotion of health. However, in the gastrointestinal (GI) tract, the nutraceuticals suffer from not only the harsh acidic environment of the stomach and a variety of digestive enzymes, but also the antibacterial activity of intestinal bile salts and the action of protease from the gut microbiota. The amount of the nutraceuticals arriving at the sites in GI tract for absorption or exerting the bioactivities is always unfortunately limited, which puts forward high requirements for protection of nutraceuticals in a certain high contents during oral consumption. Hydrogels are three-dimensional polymeric porous networks formed by the cross-linking of polymer chains, which can hold huge amounts of water. Compared with other carries with the size in microscopic scale such as nanoparticle and microcapsules, hydrogels could be considered to be more suitable delivery systems in food due to their macroscopic bulk properties, adjustable viscoelasticity and large spatial structure for embedding nutraceuticals. Regarding to the applications in food, natural polymer-based hydrogels are commonly safe and popular due to their source with the appealing characteristics of affordability, biodegradability and biocompatibility. Although chemical crosslinking has been widely utilized in preparation of hydrogels, it prefers the physical crosslinking in the researches in food. The reasonable design for the structure of natural polymeric hydrogels is essential for seeking the favorable functionalities to apply in the delivery system, and it could be possible to obtain the enhanced adhesive property, acid stability, resistant to bile salt, and the controlled release behavior. The hydrogels prepared with proteins, polysaccharides or the mix of them to deliver the functional ingredients, mainly the phenolic components, vitamins, probiotics are discussed to obtain inspiration for the wide applications in delivery systems. Further efforts might be made in the in situ formation of hydrogels in GI tract through the interaction among food polymers and small-molecular ingredients, elevation of the loading contents of nutraceuticals in hydrogels, development of stomach adhesive hydrogels as well as targeting modification of gut microbiota by the hydrogels.
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Affiliation(s)
- Min Li
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Xiaoqian He
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Ran Zhao
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Qixin Shi
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yingqun Nian
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Bing Hu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
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6
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Gutierrez AM, Frazar EM, X Klaus MV, Paul P, Hilt JZ. Hydrogels and Hydrogel Nanocomposites: Enhancing Healthcare through Human and Environmental Treatment. Adv Healthc Mater 2022; 11:e2101820. [PMID: 34811960 PMCID: PMC8986592 DOI: 10.1002/adhm.202101820] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/08/2021] [Indexed: 12/11/2022]
Abstract
Humans are constantly exposed to exogenous chemicals throughout their life, which can lead to a multitude of negative health impacts. Advanced materials can play a key role in preventing or mitigating these impacts through a wide variety of applications. The tunable properties of hydrogels and hydrogel nanocomposites (e.g., swelling behavior, biocompatibility, stimuli responsiveness, functionality, etc.) have deemed them ideal platforms for removal of environmental contaminants, detoxification, and reduction of body burden from exogenous chemical exposures for prevention of disease initiation, and advanced treatment of chronic diseases, including cancer, diabetes, and cardiovascular disease. In this review, three main junctures where the use of hydrogel and hydrogel nanocomposite materials can intervene to positively impact human health are highlighted: 1) preventing exposures to environmental contaminants, 2) prophylactic treatments to prevent chronic disease initiation, and 3) treating chronic diseases after they have developed.
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Affiliation(s)
- Angela M Gutierrez
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F Paul Anderson Tower, Lexington, KY, 40506, USA
- Superfund Research Center, University of Kentucky, Lexington, KY, 40506, USA
| | - Erin Molly Frazar
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F Paul Anderson Tower, Lexington, KY, 40506, USA
- Superfund Research Center, University of Kentucky, Lexington, KY, 40506, USA
| | - Maria Victoria X Klaus
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F Paul Anderson Tower, Lexington, KY, 40506, USA
- Superfund Research Center, University of Kentucky, Lexington, KY, 40506, USA
| | - Pranto Paul
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F Paul Anderson Tower, Lexington, KY, 40506, USA
- Superfund Research Center, University of Kentucky, Lexington, KY, 40506, USA
| | - J Zach Hilt
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F Paul Anderson Tower, Lexington, KY, 40506, USA
- Superfund Research Center, University of Kentucky, Lexington, KY, 40506, USA
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7
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Kjeldsen RB, Kristensen MN, Gundlach C, Thamdrup LHE, Müllertz A, Rades T, Nielsen LH, Zór K, Boisen A. X-ray Imaging for Gastrointestinal Tracking of Microscale Oral Drug Delivery Devices. ACS Biomater Sci Eng 2021; 7:2538-2547. [PMID: 33856194 DOI: 10.1021/acsbiomaterials.1c00225] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Microscale devices are promising tools to overcome specific challenges within oral drug delivery. Despite the availability of advanced high-quality imaging techniques, visualization and tracking of microscale devices in the gastrointestinal (GI) tract is still a challenge. This work explores the possibilities of applying planar X-ray imaging and computed tomography (CT) scanning for visualization and tracking of microscale devices in the GI tract of rats. Microcontainers (MCs) are an example of microscale devices that have shown great potential as an oral drug delivery system. Barium sulfate (BaSO4) loaded into the cavity of the MCs increases their overall X-ray contrast, which allows them to be easily tracked. The BaSO4-loaded MCs are quantitatively tracked throughout the entire GI tract of rats by planar X-ray imaging and visualized in 3D by CT scanning. The majority of the BaSO4-loaded MCs are observed to retain in the stomach for 0.5-2 h, enter the cecum after 3-4 h, and leave the cecum and colon 8-10 h post-administration. The imaging approaches can be adopted and used with other types of microscale devices when investigating GI behavior in, for example, preclinical trials and potential clinical studies.
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Affiliation(s)
- Rolf Bech Kjeldsen
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Maja Nørgaard Kristensen
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.,Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Carsten Gundlach
- Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Lasse Højlund Eklund Thamdrup
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Anette Müllertz
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.,Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Thomas Rades
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.,Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Line Hagner Nielsen
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Kinga Zór
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Anja Boisen
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
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8
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Navarro‐Barreda D, Angulo‐Pachón CA, Bedrina B, Galindo F, Miravet JF. A Dual Stimuli Responsive Supramolecular Gel Provides Insulin Hydrolysis Protection and Redox‐Controlled Release of Actives. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.201900419] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Diego Navarro‐Barreda
- Department of Inorganic and Organic ChemistryUniversity Jaume I 12071 Castelló de la Plana Spain
| | - César A. Angulo‐Pachón
- Department of Inorganic and Organic ChemistryUniversity Jaume I 12071 Castelló de la Plana Spain
| | - Begoña Bedrina
- Department of Inorganic and Organic ChemistryUniversity Jaume I 12071 Castelló de la Plana Spain
| | - Francisco Galindo
- Department of Inorganic and Organic ChemistryUniversity Jaume I 12071 Castelló de la Plana Spain
| | - Juan F. Miravet
- Department of Inorganic and Organic ChemistryUniversity Jaume I 12071 Castelló de la Plana Spain
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9
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Smart pH-responsive polymeric micelles for programmed oral delivery of insulin. Colloids Surf B Biointerfaces 2019; 183:110443. [DOI: 10.1016/j.colsurfb.2019.110443] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 07/24/2019] [Accepted: 08/15/2019] [Indexed: 11/17/2022]
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10
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Chabloz NG, Wenzel MN, Perry HL, Yoon IC, Molisso S, Stasiuk GJ, Elson DS, Cass AEG, Wilton-Ely JDET. Polyfunctionalised Nanoparticles Bearing Robust Gadolinium Surface Units for High Relaxivity Performance in MRI. Chemistry 2019; 25:10895-10906. [PMID: 31127668 DOI: 10.1002/chem.201901820] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 05/16/2019] [Indexed: 12/19/2022]
Abstract
The first example of an octadentate gadolinium unit based on DO3A (hydration number q=1) with a dithiocarbamate tether has been designed and attached to the surface of gold nanoparticles (around 4.4 nm in diameter). In addition to the superior robustness of this attachment, the restricted rotation of the Gd complex on the nanoparticle surface leads to a dramatic increase in relaxivity (r1 ) from 4.0 mm-1 s-1 in unbound form to 34.3 mm-1 s-1 (at 10 MHz, 37 °C) and 22±2 mm-1 s-1 (at 63.87 MHz, 25 °C) when immobilised on the surface. The one-pot synthetic route provides a straightforward and versatile way of preparing a range of multifunctional gold nanoparticles. The incorporation of additional surface units for biocompatibility (PEG and thioglucose units) and targeting (folic acid) leads to little detrimental effect on the high relaxivity observed for these non-toxic multifunctional materials. In addition to the passive targeting attributed to gold nanoparticles, the inclusion of a unit capable of targeting the folate receptors overexpressed by cancer cells, such as HeLa cells, illustrates the potential of these assemblies.
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Affiliation(s)
- Nicolas G Chabloz
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, London, W12 0BZ, UK
| | - Margot N Wenzel
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, London, W12 0BZ, UK
| | - Hannah L Perry
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, London, W12 0BZ, UK
| | - Il-Chul Yoon
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, London, W12 0BZ, UK
| | - Susannah Molisso
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, London, W12 0BZ, UK
| | - Graeme J Stasiuk
- School of Life Sciences, Biomedical Sciences, University of Hull, Hull, HU6 7RX, UK
| | - Daniel S Elson
- Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation and Department of Surgery and Cancer, Imperial College London, UK
| | - Anthony E G Cass
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, London, W12 0BZ, UK.,Institute of Biomedical Engineering, Imperial College London, UK.,London Centre for Nanotechnology (LCN), UK
| | - James D E T Wilton-Ely
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, London, W12 0BZ, UK.,London Centre for Nanotechnology (LCN), UK
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11
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Shafranek RT, Millik SC, Smith PT, Lee CU, Boydston AJ, Nelson A. Stimuli-responsive materials in additive manufacturing. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2019.03.002] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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12
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Homayun B, Lin X, Choi HJ. Challenges and Recent Progress in Oral Drug Delivery Systems for Biopharmaceuticals. Pharmaceutics 2019; 11:E129. [PMID: 30893852 PMCID: PMC6471246 DOI: 10.3390/pharmaceutics11030129] [Citation(s) in RCA: 365] [Impact Index Per Article: 73.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/09/2019] [Accepted: 03/14/2019] [Indexed: 01/08/2023] Open
Abstract
Routes of drug administration and the corresponding physicochemical characteristics of a given route play significant roles in therapeutic efficacy and short term/long term biological effects. Each delivery method has favorable aspects and limitations, each requiring a specific delivery vehicles design. Among various routes, oral delivery has been recognized as the most attractive method, mainly due to its potential for solid formulations with long shelf life, sustained delivery, ease of administration and intensified immune response. At the same time, a few challenges exist in oral delivery, which have been the main research focus in the field in the past few years. The present work concisely reviews different administration routes as well as the advantages and disadvantages of each method, highlighting why oral delivery is currently the most promising approach. Subsequently, the present work discusses the main obstacles for oral systems and explains the most recent solutions proposed to deal with each issue.
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Affiliation(s)
- Bahman Homayun
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
| | - Xueting Lin
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
| | - Hyo-Jick Choi
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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13
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Lo YW, Sheu MT, Chiang WH, Chiu YL, Tu CM, Wang WY, Wu MH, Wang YC, Lu M, Ho HO. In situ chemically crosslinked injectable hydrogels for the subcutaneous delivery of trastuzumab to treat breast cancer. Acta Biomater 2019; 86:280-290. [PMID: 30616077 DOI: 10.1016/j.actbio.2019.01.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 12/18/2018] [Accepted: 01/04/2019] [Indexed: 02/06/2023]
Abstract
Recently, novel approaches for the delivery of therapeutic antibodies have attracted much attention, especially sustained release formulations. However, sustained release formulations capable of carrying a high antibody load remain a challenge for practical use. In this study, a novel injectable hydrogel composed of maleimide-modified γ-polyglutamic acid (γ-PGA-MA) and thiol end-functionalized 4-arm poly(ethylene glycol) (4-arm PEG-SH) was developed for the subcutaneous delivery of trastuzumab. γ-PGA-MA and 4-arm PEG-SH formed a hydrogel through thiol-maleimide reactions, which had shear-thinning properties and reversible rheological behaviors. Moreover, a high content of trastuzumab (>100 mg/mL) could be loaded into this hydrogel, and trastuzumab demonstrated a sustained release over several weeks through electrostatic attraction. In addition, trastuzumab released from the hydrogel had adequate stability in terms of its structural integrity, binding bioactivity, and antiproliferative effect on BT-474 cells. Pharmacokinetic studies demonstrated that trastuzumab-loaded hydrogel (Her-hydrogel-10, composed of 1.5% γ-PGA-MA, 1.5% 4-arm PEG-SH, and 10 mg/mL trastuzumab) and trastuzumab/Zn-loaded hydrogel (Her/Zn-hydrogel-10, composed of 1.5% γ-PGA-MA, 1.5% 4-arm PEG-SH, 5 mM ZnCl2, and 10 mg/mL trastuzumab) could lower the maximum plasma concentration (Cmax) than the trastuzumab solution. Furthermore, Her/Zn-hydrogel-10 was better able to release trastuzumab in a controlled manner, which was ascribed to electrostatic attraction and formation of trastuzumab/Zn nanocomplexes. In a BT-474 xenograft tumor model, Her-hydrogel-10 had a similar tumor growth-inhibitory effect as that of the trastuzumab solution. By contrast, Her/Zn-hydrogel-10 exhibited a superior tumor growth-inhibitory capability due to the functionality of Zn. This study demonstrated that this hydrogel has potential as a carrier for the local and systemic delivery of proteins and antibodies. STATEMENT OF SIGNIFICANCE: Recently, novel sustained-release formulations of therapeutic antibodies have attracted much attention. However, these formulations should be able to carry a high antibody load owing to the required high dose, and these formulations remain a challenge for practical use. In this study, a novel injectable chemically cross-linked hydrogel was developed for the subcutaneous delivery of trastuzumab. This novel hydrogel possessed ideal characteristics of loading high content of trastuzumab (>100 mg/mL), sustained release of trastuzumab over several weeks, and maintaining adequate stability of trastuzumab. In vivo studies demonstrated that a trastuzumab-loaded hydrogel possessed the ability of controlled release of trastuzumab and maintained antitumor efficacy same as that of trastuzumab. These results implied that a γ-PGA-MA and 4-arm PEG-SH-based hydrogel has great potential in serving as a carrier for the local or systemic delivery of therapeutic proteins or antibodies.
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14
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Fukuoka Y, Khafagy ES, Goto T, Kamei N, Takayama K, Peppas NA, Takeda-Morishita M. Combination Strategy with Complexation Hydrogels and Cell-Penetrating Peptides for Oral Delivery of Insulin. Biol Pharm Bull 2018; 41:811-814. [PMID: 29709919 DOI: 10.1248/bpb.b17-00951] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In previous studies we showed that the complexation hydrogels based in poly(methacrylic acid-g-ethylene glycol) [P(MAA-g-EG)] rapidly release insulin in the intestine owing to their pH-dependent complexation properties; they also exhibit a high insulin-loading efficiency, enzyme-inhibiting properties, and mucoadhesive characteristics. Cell-penetrating peptides (CPPs), such as oligoarginines [hexa-arginine (R6), comprising six arginine residues], have been employed as useful tools for the oral delivery of therapeutic macromolecules. The aim of our study was to investigate the combination strategy of using P(MAA-g-EG) hydrogels with R6-based CPPs to improve the intestinal absorption of insulin. A high efficiency of loading into crosslinked P(MAA-g-EG) hydrogels was observed for insulin (96.1±1.4%) and R6 (46.6±3.8%). In addition, immediate release of the loaded insulin and R6 from these hydrogels was observed at pH 7.4 (80% was released in approximately 30 min). Consequently, a strong hypoglycemic response was observed (approximately 18% reduction in blood glucose levels) accompanied by an improvement in insulin absorption after the co-administration of insulin-loaded particles (ILP) and R6-loaded particles (ALP) into closed rat ileal segments compared with that after ILP administration alone. These results indicate that the combination of P(MAA-g-EG) hydrogels with CPPs may be a promising strategy for the oral delivery of various insulin preparations as an alternative to conventional parenteral routes.
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Affiliation(s)
- Yu Fukuoka
- Department of Pharmaceutics, Hoshi University
| | - El-Sayed Khafagy
- Laboratory of Drug Delivery Systems, Faculty of Pharmaceutical Sciences, Kobe Gakuin University.,Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Suez Canal University
| | | | - Noriyasu Kamei
- Laboratory of Drug Delivery Systems, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | | | - Nicholas A Peppas
- Departments of Chemical and Biomedical Engineering, Department of Surgery, Dell Medical School and Division of Pharmaceutics, The University of Texas at Austin
| | - Mariko Takeda-Morishita
- Laboratory of Drug Delivery Systems, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
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15
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Wagner AM, Gran MP, Peppas NA. Designing the new generation of intelligent biocompatible carriers for protein and peptide delivery. Acta Pharm Sin B 2018; 8:147-164. [PMID: 29719776 PMCID: PMC5925450 DOI: 10.1016/j.apsb.2018.01.013] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 01/26/2018] [Accepted: 01/28/2018] [Indexed: 12/11/2022] Open
Abstract
Therapeutic proteins and peptides have revolutionized treatment for a number of diseases, and the expected increase in macromolecule-based therapies brings a new set of challenges for the pharmaceutics field. Due to their poor stability, large molecular weight, and poor transport properties, therapeutic proteins and peptides are predominantly limited to parenteral administration. The short serum half-lives typically require frequent injections to maintain an effective dose, and patient compliance is a growing issue as therapeutic protein treatments become more widely available. A number of studies have underscored the relationship of subcutaneous injections with patient non-adherence, estimating that over half of insulin-dependent adults intentionally skip injections. The development of oral formulations has the potential to address some issues associated with non-adherence including the interference with daily activities, embarrassment, and injection pain. Oral delivery can also help to eliminate the adverse effects and scar tissue buildup associated with repeated injections. However, there are several major challenges associated with oral delivery of proteins and peptides, such as the instability in the gastrointestinal (GI) tract, low permeability, and a narrow absorption window in the intestine. This review provides a detailed overview of the oral delivery route and associated challenges. Recent advances in formulation and drug delivery technologies to enhance bioavailability are discussed, including the co-administration of compounds to alter conditions in the GI tract, the modification of the macromolecule physicochemical properties, and the use of improved targeted and controlled release carriers.
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Affiliation(s)
- Angela M. Wagner
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, USA
| | - Margaret P. Gran
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Nicholas A. Peppas
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, USA
- Department of Pediatrics, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA
- Department of Surgery and Perioperative Care, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA
- Division of Pharmaceutics, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA
- Corresponding author at: McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA. Tel.: +1 512 471 6644; fax: +1 512 471 8227.
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Yoshida M, Kamei N, Muto K, Kunisawa J, Takayama K, Peppas NA, Takeda-Morishita M. Complexation hydrogels as potential carriers in oral vaccine delivery systems. Eur J Pharm Biopharm 2017; 112:138-142. [DOI: 10.1016/j.ejpb.2016.11.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 10/01/2016] [Accepted: 11/24/2016] [Indexed: 10/20/2022]
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17
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Li L, Jiang G, Yu W, Liu D, Chen H, Liu Y, Tong Z, Kong X, Yao J. Preparation of chitosan-based multifunctional nanocarriers overcoming multiple barriers for oral delivery of insulin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 70:278-286. [DOI: 10.1016/j.msec.2016.08.083] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 08/21/2016] [Accepted: 08/30/2016] [Indexed: 11/30/2022]
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18
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Longo GS, Olvera de la Cruz M, Szleifer I. Controlling swelling/deswelling of stimuli-responsive hydrogel nanofilms in electric fields. SOFT MATTER 2016; 12:8359-8366. [PMID: 27714330 DOI: 10.1039/c6sm01172a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The swelling/deswelling transition of pH-sensitive, electrode-grafted, hydrogel nanofilms when exposed to electric fields is studied by theoretical analysis. In acidic conditions, the response of these films to changes in pH is dominated by network-surface interactions, while intra-network electrostatic repulsions, which are highly modulated by the adsorption of salt ions, determine material response at a higher pH. Film thickness is a non-monotonic function of solution pH and displays a local maximum, a local minimum or both, depending on the salt concentration and the applied voltage. We suggest the use of these materials in the development of biosensors and control of enzyme activity.
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Affiliation(s)
- Gabriel S Longo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CONICET, La Plata, Argentina.
| | - Monica Olvera de la Cruz
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois, USA and Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois, USA
| | - Igal Szleifer
- Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois, USA and Department of Biomedical Engineering, Northwestern University, Evanston, Illinois, USA and Department of Chemistry, Northwestern University, Evanston, Illinois, USA
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19
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Self-assembling bubble carriers for oral protein delivery. Biomaterials 2015; 64:115-24. [DOI: 10.1016/j.biomaterials.2015.06.035] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 06/11/2015] [Accepted: 06/18/2015] [Indexed: 11/17/2022]
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Khafagy ES, Iwamae R, Kamei N, Takeda-Morishita M. Region-Dependent Role of Cell-Penetrating Peptides in Insulin Absorption Across the Rat Small Intestinal Membrane. AAPS JOURNAL 2015. [PMID: 26216471 DOI: 10.1208/s12248-015-9804-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We have reported that the cell-penetrating peptide (CPP) penetratin acts as a potential absorption enhancer in oral insulin delivery systems and that this action occurs through noncovalent intermolecular interactions. However, the region-dependent role of CPPs in intestinal insulin absorption has not been clarified. To identify the intestinal region where CPPs have the most effect in increasing insulin absorption, the region-dependent action of penetratin was investigated using in situ closed intestinal loops in rats. The order of the insulin area under the insulin concentration-time curve (AUC) increase effect by L-penetratin was ileum > jejunum > duodenum > colon. By contrast, the AUC order after coadministration of insulin with D-penetratin was colon > duodenum ≥ jejunum and ileum. We also compared the effects of the L- and D-forms of penetratin, R8, and PenetraMax on ileal insulin absorption. Along with the CPPs used in this study, L- and D-PenetraMax produced the largest insulin AUCs. An absorption study using ilea pretreated with CPPs showed that PenetraMax had no irreversible effect on the intestinal epithelial membrane. The degradation of insulin in the presence of CPPs was assessed in rat intestinal enzymatic fluid. The half-life (t 1/2) of insulin increased from 14.5 to 23.7 and 184.7 min in the presence of L- and D-PenetraMax, respectively. These enzymatic degradation-resistant effects might contribute partly to the increased ileal absorption of insulin induced by D-PenetraMax. In conclusion, this study demonstrated that the ability of the L- and D-forms of penetratin to increase intestinal insulin absorption was maximal in the ileum and the colon, respectively, and that D-PenetraMax is a powerful but transient enhancer of oral insulin absorption.
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Affiliation(s)
- El-Sayed Khafagy
- Laboratory of Drug Delivery Systems, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, Hyogo, 650-8586, Japan.,Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Suez Canal University, Ismailia, 415-22, Egypt
| | - Ruisha Iwamae
- Laboratory of Drug Delivery Systems, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, Hyogo, 650-8586, Japan
| | - Noriyasu Kamei
- Laboratory of Drug Delivery Systems, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, Hyogo, 650-8586, Japan
| | - Mariko Takeda-Morishita
- Laboratory of Drug Delivery Systems, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, Hyogo, 650-8586, Japan.
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21
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Ahmad M, Rai SM, Mahmood A. Hydrogel Microparticles as an Emerging Tool in Pharmaceutical Field: A Review. ADVANCES IN POLYMER TECHNOLOGY 2015. [DOI: 10.1002/adv.21535] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Mahmood Ahmad
- Faculty of Pharmacy; The Islamia University of Bahawalpur; Bahawalpur Punjab 63100 Pakistan
| | - Sarfraz Muhammad Rai
- Faculty of Pharmacy; The Islamia University of Bahawalpur; Bahawalpur Punjab 63100 Pakistan
| | - Asif Mahmood
- Faculty of Pharmacy; The Islamia University of Bahawalpur; Bahawalpur Punjab 63100 Pakistan
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22
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Knipe JM, Chen F, Peppas NA. Enzymatic biodegradation of hydrogels for protein delivery targeted to the small intestine. Biomacromolecules 2015; 16:962-72. [PMID: 25674922 DOI: 10.1021/bm501871a] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Multiresponsive poly(methacrylic acid-co-N-vinylpyrrolidone) hydrogels were synthesized with biodegradable oligopeptide crosslinks. The oligopeptide crosslinks were incorporated using EDC-NHS zero-length links between the carboxylic acid groups of the polymer and free primary amines on the peptide. The reaction of the peptide was confirmed by primary amine assay and IR spectroscopy. The microgels exhibited pH-responsive swelling as well as enzyme-catalyzed degradation targeted by trypsin present in the small intestine, as demonstrated upon incubation with gastrointestinal fluids from rats. Relative turbidity was used to evaluate enzyme-catalyzed degradation as a function of time, and initial trypsin concentration controlled both the degradation mechanism as well as the extent of degradation. Trypsin activity was effectively extinguished by incubation at 70 °C, and both the microgels and degradation products posed no cytotoxic effect toward two different cell lines. The microgels demonstrated pH-dependent loading of the protein insulin for oral delivery to the small intestine.
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Affiliation(s)
- Jennifer M Knipe
- Department of Chemical Engineering, C0400, ‡Department of Biomedical Engineering, C0800, §College of Pharmacy, A1900, and #Institute for Biomaterials, Drug Delivery and Regenerative Medicine, C0800, The University of Texas at Austin , Austin, Texas 78712, United States
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23
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Lv Y, Zhang J, Wu H, Zhao S, Song Y, Wang S, Wang B, Lv G, Ma X. A protease inhibition strategy based on acceleration of autolysis. Chem Commun (Camb) 2015; 51:5959-62. [DOI: 10.1039/c5cc01448d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An iconoclastic protease inhibition strategy based on autolysis acceleration: proteases are concentrated and induced to self-digest by a polymer via electrostatic interaction. Such a catalytic cycle results in high inhibition efficiency.
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Affiliation(s)
- Yan Lv
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Jianbin Zhang
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Hao Wu
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Shan Zhao
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Yizhe Song
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Shujun Wang
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Bing Wang
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Guojun Lv
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Xiaojun Ma
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
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24
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Ma G. Microencapsulation of protein drugs for drug delivery: strategy, preparation, and applications. J Control Release 2014; 193:324-40. [PMID: 25218676 DOI: 10.1016/j.jconrel.2014.09.003] [Citation(s) in RCA: 157] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 09/01/2014] [Accepted: 09/03/2014] [Indexed: 11/25/2022]
Abstract
Bio-degradable poly(lactide) (PLA)/poly(lactide-glycolide) (PLGA) and chitosan microspheres (or microcapsules) have important applications in Drug Delivery Systems (DDS) of protein/peptide drugs. By encapsulating protein/peptide drugs in the microspheres, the serum drug concentration can be maintained at a higher constant value for a prolonged time, or injection formulation can be changed to orally or mucosally administered formulation. PLA/PLGA and chitosan are most often used in injection formulation and oral formulation. However, in the preparation and applications of PLA/PLGA and chitosan microspheres containing protein/peptide drugs, the problems of broad size distribution and poor reproducibility of microspheres, and deactivation of protein during the preparation, storage and release, are still big challenges. In this article, the techniques for control of the diameter of microspheres and microcapsules will be introduced at first, then the strategies about how to maintain the bioactivity of protein drugs during preparation and drug release will be reviewed and developed in our research group. The membrane emulsification techniques including direct membrane emulsification and rapid membrane emulsification processes were developed to prepare uniform-sized microspheres, the diameter of microspheres can be controlled from submicron to 100μm by these two processes, and the reproducibility of products can be guaranteed. Furthermore, compared with conventional stirring method, the big advantages of membrane emulsification process were that the uniform microspheres with much higher encapsulation efficiency can be obtained, and the release behavior can be adjusted by selecting microsphere size. Mild membrane emulsification condition also can prevent the deactivation of proteins, which frequently occurred under high shear force in mechanical stirring, sonification, and homogenization methods. The strategies for maintaining the bioactivity of protein drug were developed, such as adding additives into protein solution, using solid drug powder instead of protein solution, and employing hydrophilic poly(lactide)-poly(ethylene glycol) (PELA) as a wall material for encapsulation in PLA/PLGA microspheres/microcapsules; developing step-wise crosslinking process, self-solidification process, and adsorbing protein drug into preformed chitosan microsphere with hollow-porous morphology for encapsulation in chitosan microsphere. As a result, animal test demonstrated that PELA microcapsules with uniform size and containing recombinant human growth hormone (rhGH) can maintain higher blood drug concentration for 2months, and increased animal weight more apparently only by single dose, compared with PLA and PLGA microcapsules; hollow-porous chitosan microsphere loading insulin decreased blood glucose level largely when it was used as a carrier for oral administration.
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Affiliation(s)
- Guanghui Ma
- State Key Laboratory of Biochemical Engineering, PLA Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering, No. 1 Bei-Er-Tiao, Zhong-Guan-Cun, Beijing 100190, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), No.92 Weijin Road, Nankai District, Tianjin 300072, China
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25
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Lv Y, Zhang J, Song Y, Wang B, Wang S, Zhao S, Lv G, Ma X. Natural Anionic Polymer Acts as Highly Efficient Trypsin Inhibitor Based on an Electrostatic Interaction Mechanism. Macromol Rapid Commun 2014; 35:1606-10. [DOI: 10.1002/marc.201400267] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 06/11/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Yan Lv
- Laboratory of Biomedical Material Engineering; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 PR China
- University of the Chinese Academy of Sciences; 19 Yuquan Road Beijing 100049 PR China
| | - Jianbin Zhang
- Laboratory of Biomedical Material Engineering; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 PR China
- University of the Chinese Academy of Sciences; 19 Yuquan Road Beijing 100049 PR China
| | - Yizhe Song
- Laboratory of Biomedical Material Engineering; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 PR China
- University of the Chinese Academy of Sciences; 19 Yuquan Road Beijing 100049 PR China
| | - Bing Wang
- Laboratory of Biomedical Material Engineering; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 PR China
- University of the Chinese Academy of Sciences; 19 Yuquan Road Beijing 100049 PR China
| | - Shujun Wang
- Laboratory of Biomedical Material Engineering; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 PR China
| | - Shan Zhao
- Laboratory of Biomedical Material Engineering; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 PR China
- University of the Chinese Academy of Sciences; 19 Yuquan Road Beijing 100049 PR China
| | - Guojun Lv
- Laboratory of Biomedical Material Engineering; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 PR China
| | - Xiaojun Ma
- Laboratory of Biomedical Material Engineering; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 PR China
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Gavira JA, Cera-Manjarres A, Ortiz K, Mendez J, Jimenez-Torres JA, Patiño-Lopez LD, Torres-Lugo M. Use of Cross-Linked Poly(ethylene glycol)-Based Hydrogels for Protein Crystallization. CRYSTAL GROWTH & DESIGN 2014; 14:3239-3248. [PMID: 25383049 PMCID: PMC4215911 DOI: 10.1021/cg401668z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 04/24/2014] [Indexed: 05/24/2023]
Abstract
Poly(ethylene glycol) (PEG) hydrogels are highly biocompatible materials extensively used for biomedical and pharmaceutical applications, controlled drug release, and tissue engineering. In this work, PEG cross-linked hydrogels, synthesized under various conditions, were used to grow lysozyme crystals by the counterdiffusion technique. Crystallization experiments were conducted using a three-layer arrangement. Results demonstrated that PEG fibers were incorporated within lysozyme crystals controlling the final crystal shape. PEG hydrogels also induced the nucleation of lysozyme crystals to a higher extent than agarose. PEG hydrogels can also be used at higher concentrations (20-50% w/w) as a separation chamber (plug) in counterdiffusion experiments. In this case, PEG hydrogels control the diffusion of the crystallization agent and therefore may be used to tailor the supersaturation to fine-tune crystal size. As an example, insulin crystals were grown in 10% (w/w) PEG hydrogel. The resulting crystals were of an approximate size of 500 μm.
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Affiliation(s)
- Jose A. Gavira
- Laboratorio
de Estudios Crystalográficos, IACT (CSIC-UGR). Avda. las Palmeras 4, E18100 Armilla, Granada, Spain
| | - Andry Cera-Manjarres
- Department
of Chemical Engineering, University of Puerto
Rico, Mayagüez Campus, Mayagüez, Puerto Rico
| | - Katia Ortiz
- Department
of Chemical Engineering, University of Puerto
Rico, Mayagüez Campus, Mayagüez, Puerto Rico
| | - Janet Mendez
- Department
of Chemical Engineering, University of Puerto
Rico, Mayagüez Campus, Mayagüez, Puerto Rico
| | - Jose A. Jimenez-Torres
- Department
of Chemical Engineering, University of Puerto
Rico, Mayagüez Campus, Mayagüez, Puerto Rico
| | - Luis D. Patiño-Lopez
- Laboratorio
de Estudios Crystalográficos, IACT (CSIC-UGR). Avda. las Palmeras 4, E18100 Armilla, Granada, Spain
| | - Madeline Torres-Lugo
- Department
of Chemical Engineering, University of Puerto
Rico, Mayagüez Campus, Mayagüez, Puerto Rico
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Gao X, Cao Y, Song X, Zhang Z, Zhuang X, He C, Chen X. Biodegradable, pH-Responsive Carboxymethyl Cellulose/Poly(Acrylic Acid) Hydrogels for Oral Insulin Delivery. Macromol Biosci 2013; 14:565-75. [DOI: 10.1002/mabi.201300384] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 10/11/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaoye Gao
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
| | - Yue Cao
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
| | - Xiangfu Song
- School of Public Health; Jilin University; Changchun 130021 P. R. China
| | - Zhe Zhang
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
- Department of Chemistry; Northeast Normal University; Changchun 130022 P. R. China
| | - Xiuli Zhuang
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
| | - Chaoliang He
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
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Chuang EY, Lin KJ, Su FY, Mi FL, Maiti B, Chen CT, Wey SP, Yen TC, Juang JH, Sung HW. Noninvasive imaging oral absorption of insulin delivered by nanoparticles and its stimulated glucose utilization in controlling postprandial hyperglycemia during OGTT in diabetic rats. J Control Release 2013; 172:513-22. [DOI: 10.1016/j.jconrel.2013.05.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 05/02/2013] [Accepted: 05/12/2013] [Indexed: 10/26/2022]
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29
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Zhang L, Zhang Z, Li N, Wang N, Wang Y, Tang S, Xu L, Ren Y. Synthesis and evaluation of a novel β-cyclodextrin derivative for oral insulin delivery and absorption. Int J Biol Macromol 2013; 61:494-500. [DOI: 10.1016/j.ijbiomac.2013.08.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 08/23/2013] [Indexed: 12/30/2022]
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30
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Gao X, Cao Y, Song X, Zhang Z, Xiao C, He C, Chen X. pH- and thermo-responsive poly(N-isopropylacrylamide-co-acrylic acid derivative) copolymers and hydrogels with LCST dependent on pH and alkyl side groups. J Mater Chem B 2013; 1:5578-5587. [PMID: 32261182 DOI: 10.1039/c3tb20901f] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A series of pH- and temperature-responsive poly(N-isopropylacrylamide-co-acrylic acid derivative) (P(NIPAM-co-AAD)) copolymers and hydrogels were prepared. The lower critical solution temperatures (LCSTs) of the copolymers exhibited a dependence on both pH and the hydrophobicity of the AAD unit. The influence of pH and temperature on the equilibrium swelling ratio of the hydrogels was investigated. The hydrogels displayed a unique thermo-induced swelling-deswelling transition that can be self-regulated to occur at above or below the physiological temperature in response to the environmental pH. Scanning electron microscopic (SEM) analysis revealed porous sponge-like microstructures of the hydrogels. Insulin was loaded into the hydrogels as a model protein, and the in vitro release profiles indicated that the loaded protein could be protected within the hydrogels in an acidic environment and selectively released in neutral medium. MTT assay proved that both the copolymers and hydrogels are nontoxic. After oral administration of the insulin-loaded hydrogels to streptozotocin-induced diabetic rats at 60 IU per kg, the fasting plasma glucose level was reduced continuously to 72.1% within 6 h. The bioavailability of hydrogel-encapsulated insulin via the oral administration to healthy rabbits reached 5.24%, which is much higher than that of pure insulin solution given orally. These results showed that the smart copolymers and hydrogels may hold great promise for pH-triggered drug delivery systems.
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Affiliation(s)
- Xiaoye Gao
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.
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31
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Chuang EY, Lin KJ, Su FY, Chen HL, Maiti B, Ho YC, Yen TC, Panda N, Sung HW. Calcium depletion-mediated protease inhibition and apical-junctional-complex disassembly via an EGTA-conjugated carrier for oral insulin delivery. J Control Release 2013. [DOI: 10.1016/j.jconrel.2012.11.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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32
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Li H, Yu Y, Faraji Dana S, Li B, Lee CY, Kang L. Novel engineered systems for oral, mucosal and transdermal drug delivery. J Drug Target 2013; 21:611-29. [PMID: 23869879 DOI: 10.3109/1061186x.2013.805335] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Technological advances in drug discovery have resulted in increasing number of molecules including proteins and peptides as drug candidates. However, how to deliver drugs with satisfactory therapeutic effect, minimal side effects and increased patient compliance is a question posted before researchers, especially for those drugs with poor solubility, large molecular weight or instability. Microfabrication technology, polymer science and bioconjugate chemistry combine to address these problems and generate a number of novel engineered drug delivery systems. Injection routes usually have poor patient compliance due to their invasive nature and potential safety concerns over needle reuse. The alternative non-invasive routes, such as oral, mucosal (pulmonary, nasal, ocular, buccal, rectal, vaginal), and transdermal drug delivery have thus attracted many attentions. Here, we review the applications of the novel engineered systems for oral, mucosal and transdermal drug delivery.
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Affiliation(s)
- Hairui Li
- Department of Pharmacy, National University of Singapore, Singapore
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33
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Gao X, He C, Xiao C, Zhuang X, Chen X. Biodegradable pH-responsive polyacrylic acid derivative hydrogels with tunable swelling behavior for oral delivery of insulin. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.01.050] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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34
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Hu S, Niu M, Hu F, Lu Y, Qi J, Yin Z, Wu W. Integrity and stability of oral liposomes containing bile salts studied in simulated and ex vivo gastrointestinal media. Int J Pharm 2013; 441:693-700. [PMID: 23089580 DOI: 10.1016/j.ijpharm.2012.10.025] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 09/13/2012] [Accepted: 10/11/2012] [Indexed: 10/27/2022]
Abstract
The objective of this study was to investigate the integrtity and stability of oral liposomes containing glycocholate (SGC-Lip) in simulated gastrointestinal (GI) media and ex vivo GI media from rats in comparison with conventional liposomes (CH-Lip) composed of soybean phosphatidylcholine and cholesterol. Membrane integrity of liposomes was evaluated by monitoring calcein release, particle size and distribution in different simulated GI media. The stability of liposomes encapsulating insulin was investigated in simulated GI fluids containing pepsin or pancreatin and ex vivo GI enzyme fluids. Simulated GI media with low pH or physiological bile salts resulted in significant increase in calcein release, but dynamic laser scattering data showed that the size and distribution were generally stable. SGC-Lip retained the major amount of the initially encapsulated insulin as compared with CH-Lip in simulated GI fluids (SGF, FaSSGF, SIF and FeSSIF-V2). SGC-Lip retained respectively 17.1% and 20.5% of the initially encapsulated insulin in ex vivo GI fluid, which were also significantly more than CH-Lip. These results suggested that SGC-Lip could protect insulin from degradation to some degree during their transit through the gastrointestinal tract and contributed to enhanced oral absorption.
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Affiliation(s)
- Shunwen Hu
- School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery of Ministry of Education and PLA, Shanghai 201203, PR China
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35
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Ternary Polymeric Nanoparticles for Oral siRNA Delivery. Pharm Res 2013; 30:1228-39. [DOI: 10.1007/s11095-012-0961-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Accepted: 12/07/2012] [Indexed: 10/27/2022]
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36
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Wang J, Dong B, Chen B, Xu S, Zhang S, Yu W, Xu C, Song H. Glutathione modified gold nanorods with excellent biocompatibility and weak protein adsorption, targeting imaging and therapy toward tumor cells. Dalton Trans 2013; 42:11548-58. [DOI: 10.1039/c3dt51246k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Schoener CA, Hutson HN, Peppas NA. pH-responsive hydrogels with dispersed hydrophobic nanoparticles for the oral delivery of chemotherapeutics. J Biomed Mater Res A 2012; 101:2229-36. [PMID: 23281185 DOI: 10.1002/jbm.a.34532] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2012] [Revised: 10/16/2012] [Accepted: 10/18/2012] [Indexed: 01/13/2023]
Abstract
Amphiphilic polymer carriers were formed by polymerizing a hydrophilic, pH-responsive hydrogel composed of poly(methacrylic-grafted-ethylene glycol) (P(MAA-g-EG)) in the presence of hydrophobic PMMA nanoparticles. These polymer carriers were varied in PMMA nanoparticle content to elicit a variety of physiochemical properties which would preferentially load doxorubicin, a hydrophobic chemotherapeutic, and release doxorubicin locally in the colon for the treatment of colon cancers. Loading levels ranged from 49% to 64% and increased with increasing nanoparticle content. Doxorubicin loaded polymers were released in a physiological model where low pH was used to simulate the stomach and then stepped to more neutral conditions to simulate the upper small intestine. P(MAA-g-EG) containing nanoparticles were less mucoadhesive as determined using a tensile tester, polymer samples, and fresh porcine small intestine. The cytocompatibility of the polymer materials were assessed using cell lines representing the GI tract and colon cancer and were noncytotoxic at varying concentrations and exposure times.
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Affiliation(s)
- Cody A Schoener
- Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
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38
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Chaturvedi K, Ganguly K, Nadagouda MN, Aminabhavi TM. Polymeric hydrogels for oral insulin delivery. J Control Release 2012; 165:129-38. [PMID: 23159827 DOI: 10.1016/j.jconrel.2012.11.005] [Citation(s) in RCA: 167] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Revised: 11/04/2012] [Accepted: 11/06/2012] [Indexed: 11/28/2022]
Abstract
The search for an effective and reliable oral insulin delivery system has been a major challenge facing pharmaceutical scientists for over many decades. Even though innumerable carrier systems that protect insulin from degradation in the GIT with improved membrane permeability and biological activity have been developed, yet a clinically acceptable device is not available for human application. Efforts in this direction are continuing at an accelerated speed. One of the preferred systems widely explored is based on polymeric hydrogels that protect insulin from enzymatic degradation in acidic stomach and delivers effectively in the intestine. Swelling and deswelling mechanisms of the hydrogel under varying pH conditions of the body control the release of insulin. The micro and nanoparticle (NP) hydrogel devices based on biopolymers have been widely explored, but their applications in human insulin therapy are still far from satisfactory. The present review highlights the recent findings on hydrogel-based devices for oral delivery of insulin. Literature data are critically assessed and results from different laboratories are compared.
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Affiliation(s)
- Kiran Chaturvedi
- Soniya Education Trust's College of Pharmacy, S.R. Nagar, Dharwad, India
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39
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Ali MRK, Snyder B, El-Sayed MA. Synthesis and optical properties of small Au nanorods using a seedless growth technique. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9807-15. [PMID: 22620850 DOI: 10.1021/la301387p] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Gold nanoparticles have shown potential in photothermal cancer therapy and optoelectronic technology. In both applications, a call for small size nanorods is warranted. In the present work, a one-pot seedless synthetic technique has been developed to prepare relatively small monodisperse gold nanorods with average dimensions (length × width) of 18 × 4.5 nm, 25 × 5 nm, 15 × 4.5 nm, and 10 × 2.5 nm. In this method, the pH was found to play a crucial role in the monodispersity of the nanorods when the NaBH(4) concentration of the growth solution was adjusted to control the reduction rate of the gold ions. At the optimized pH and NaBH(4) concentrations, smaller gold nanorods were produced by adjusting the CTAB concentration in the growth solution. In addition, the concentration of silver ions in the growth solution was found to be pivotal in controlling the aspect ratio of the nanorods. The extinction coefficient values for the small gold nanorods synthesized with three different aspect ratios were estimated using the absorption spectra, size distributions, and the atomic spectroscopic analysis data. The previously accepted relationships between the extinction coefficient or the longitudinal band wavelength values and the nanorods' aspect ratios found for the large nanorods do not extend to the small size domain reported in the present work. The failure of extending these relationships over larger sizes is a result of the interaction of light with the large rods giving an extinction band which results mostly from scattering processes while the extinction of the small nanorods results from absorption processes.
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Affiliation(s)
- Moustafa R K Ali
- Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
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40
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Hydrogels as drug-delivery platforms: physicochemical barriers and solutions. Ther Deliv 2012; 3:775-86. [DOI: 10.4155/tde.12.48] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The properties of hydrogels, in particular their high biocompatibility and water sorption uptake, make hydrogels very attractive in drug delivery and biomedical devices. These favorable features of hydrogels are compromised by certain structural limitations such as those associated with their low mechanical strength in the swollen state. This review highlights the most important challenges that may seriously affect the practical implementation of hydrogels in clinical practice and the solutions that may be applied to overcome these limitations.
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41
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Abstract
Macromolecular therapeutics, in particular, many biologics, is the most advancing category of drugs over conventional chemical drugs. The potency and specificity of the biologics for curing certain disease made them to be a leading compound in the pharmaceutical industry. However, due to their intrinsic nature, including high molecular weight, hydrophilicity and instability, they are difficult to be administered via non-invasive route. This is a major quest especially in biologics, as they are frequently used clinically for chronic disorders, which requires long-term administration. Therefore, many efforts have been made to develop formulation for non-invasive administration, in attempt to improve patient compliance and convenience. In this review, strategies for non-invasive delivery, in particular, oral, pulmonary and nasal delivery, that are recently adopted for delivery of biologics are discussed. Insulin, calcitonin and heparin were mainly focused for the discussion as they could represent protein, polypeptide and polysaccharide drugs, respectively. Many recent attempts for non-invasive delivery of biologics are compared to provide an insight of developing successful delivery system.
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Affiliation(s)
- Seung Woo Chung
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
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42
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Schoener CA, Hutson HN, Peppas NA. pH-Responsive Hydrogels with Dispersed Hydrophobic Nanoparticles for the Delivery of Hydrophobic Therapeutic Agents. POLYM INT 2012; 61:874-879. [PMID: 23087546 DOI: 10.1002/pi.4219] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
To investigate the delivery of hydrophobic therapeutic agents, a new class of polymer carriers was synthesized. These carriers are composed of two components: (i) a pH-responsive hydrogel composed of methacrylic acid grafted with poly(ethylene glycol) tethers, P(MAA-g-EG), and (ii) hydrophobic poly(methyl methacrylate) (PMMA) nanoparticles. Before the P(MAA-g-EG) hydrogel was crosslinked, PMMA nanoparticles were added to the solution and upon exposure to UV light they were photoencapsulated throughout the P(MAA-g-EG) hydrogel structure. The pH-responsive behavior of P(MAA-g-EG) is capable of triggered release of a loaded therapeutic agent, such as a low molecular weight drug or protein, when it passes from the stomach (low pH) to upper small intestine (neutral pH). The introduction of PMMA nanoparticles into the hydrogel structure affected the swelling behavior, therapeutic agent loading efficiency, and solute release profiles. In equilibrium swelling conditions the swelling ratio of nanoparticle-containing hydrogels decreased with increasing nanoparticle content. Loading efficiencies of the model therapeutic agent fluorescein ranged from 38 - 51 % and increased with increasing hydrophobic content. Release studies from neat P(MAA-g-EG) and the ensuing P(MAA-g-EG) hydrogels containing nanoparticles indicated that the transition from low pH (2.0) to neutral pH (7.0) triggered fluorescein release. Maximum fluorescein release depended on the structure and hydrophobicity of the carriers used in these studies.
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Affiliation(s)
- Cody A Schoener
- Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
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43
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Perakslis E, Tuesca A, Lowman A. Complexation hydrogels for oral protein delivery: an in vitro assessment of the insulin transport-enhancing effects following dissolution in simulated digestive fluids. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012. [DOI: 10.1163/156856207794761989] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Eric Perakslis
- a Biomaterials and Drug Delivery Laboratory, Department of Chemical and Biological Engineering, Drexel University, Philadelphia, PA 19104, USA; Centocor Research & Development, Radnor, PA 19087, USA
| | - Anthony Tuesca
- b Biomaterials and Drug Delivery Laboratory, Department of Chemical and Biological Engineering, Drexel University, Philadelphia, PA 19104, USA
| | - Anthony Lowman
- c Biomaterials and Drug Delivery Laboratory, Department of Chemical and Biological Engineering, Drexel University, Philadelphia, PA 19104, USA
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44
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Wang J, Dong B, Chen B, Jiang Z, Song H. Selective photothermal therapy for breast cancer with targeting peptide modified gold nanorods. Dalton Trans 2012; 41:11134-44. [DOI: 10.1039/c2dt31227a] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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45
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Advanced molecular design of biopolymers for transmucosal and intracellular delivery of chemotherapeutic agents and biological therapeutics. J Control Release 2011; 155:119-27. [PMID: 21699934 DOI: 10.1016/j.jconrel.2011.06.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 05/21/2011] [Accepted: 06/03/2011] [Indexed: 12/22/2022]
Abstract
Hydrogels have been instrumental in the development of polymeric systems for controlled release of therapeutic agents. These materials are attractive for transmucosal and intracellular drug delivery because of their facile synthesis, inherent biocompatibility, tunable physicochemical properties, and capacity to respond to various physiological stimuli. In this contribution, we outline a multifaceted hydrogel-based approach for expanding the range of therapeutics in oral formulations from classical small-molecule drugs to include proteins, chemotherapeutics, and nucleic acids. Through judicious material selection and careful design of copolymer composition and molecular architecture, we can engineer systems capable of responding to distinct physiological cues, with tunable physicochemical properties that are optimized to load, protect, and deliver valuable macromolecular payloads to their intended site of action. These hydrogel carriers, including complexation hydrogels, tethered hydrogels, interpenetrating networks, nanoscale hydrogels, and hydrogels with decorated structures are investigated for their ability to respond to changes in pH, to load and release insulin and fluorescein, and remain non-toxic to Caco-2 cells. Our results suggest these novel hydrogel networks have great potential for controlled delivery of proteins, chemotherapeutics, and nucleic acids.
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46
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Mundargi RC, Rangaswamy V, Aminabhavi TM. pH-Sensitive oral insulin delivery systems using Eudragit microspheres. Drug Dev Ind Pharm 2011; 37:977-85. [DOI: 10.3109/03639045.2011.552908] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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47
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48
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Shofner JP, Phillips MA, Peppas NA. Cellular evaluation of synthesized insulin/transferrin bioconjugates for oral insulin delivery using intelligent complexation hydrogels. Macromol Biosci 2010; 10:299-306. [PMID: 20034125 DOI: 10.1002/mabi.200900223] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Insulin transport across the epithelial cell layer in the small intestine was studied using insulin/transferrin conjugates with and without the presence of P(MAA-g-EG) microparticles in contact with a co-culture of Caco-2/HT29-MTX cells. The insulin/transferrin conjugate was shown to increase transport relative to pure insulin by a factor of 7, achieving an apparent permeability of 37 x 10(9) cm . s(-1). The presence of P(MAA-g-EG) microparticles increased conjugate transport by a factor of 14 times relative to insulin, achieving an apparent permeability of 72.8 x 10(9) cm . s(-1). The presence of the microparticles in solution was found to improve conjugate transport by nearly 100% with little to no change in cell monolayer integrity.
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Affiliation(s)
- Justin P Shofner
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, USA
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49
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Abstract
Nanomaterials for targeted delivery are uniquely capable of localizing delivery of therapeutics and diagnostics to diseased tissues. The ability to achieve high, local concentrations of drugs or image contrast agents at a target site provides the opportunity for improved system performance and patient outcomes along with reduced systemic dosing. In this review, the design of targeted nanodelivery systems is discussed with an emphasis on in vivo performance, the physicochemical properties that affect localization at the target site, and the incorporation of therapeutic drugs into these systems.
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Affiliation(s)
- Margaret A Phillips
- Department of Biomedical Engineering, Department of Chemical Engineering, Division of Pharmacy, The University of Texas at Austin, Austin, TX 78712
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50
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Yin L, Ding J, Zhang J, He C, Tang C, Yin C. Polymer integrity related absorption mechanism of superporous hydrogel containing interpenetrating polymer networks for oral delivery of insulin. Biomaterials 2010; 31:3347-56. [DOI: 10.1016/j.biomaterials.2010.01.045] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Accepted: 01/08/2010] [Indexed: 10/19/2022]
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