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Osmond M, Korthals E, Zimmermann CJ, Roth EJ, Marr DW, Neeves KB. Magnetically Powered Chitosan Milliwheels for Rapid Translation, Barrier Function Rescue, and Delivery of Therapeutic Proteins to the Inflamed Gut Epithelium. ACS OMEGA 2023; 8:11614-11622. [PMID: 37008083 PMCID: PMC10061643 DOI: 10.1021/acsomega.3c00886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 03/08/2023] [Indexed: 06/19/2023]
Abstract
Inflammatory bowel disease (IBD) is mediated by an overexpression of tumor necrosis factor-α (TNF) by mononuclear cells in the intestinal mucosa. Intravenous delivery of neutralizing anti-TNF antibodies can cause systemic immunosuppression, and up to one-third of people are non-responsive to treatment. Oral delivery of anti-TNF could reduce adverse effects; however, it is hampered by antibody degradation in the harsh gut environment during transit and poor bioavailability. To overcome these shortcomings, we demonstrate magnetically powered hydrogel particles that roll along mucosal surfaces, provide protection from degradation, and sustain the local release of anti-TNF. Iron oxide particles are embedded into a cross-linked chitosan hydrogel and sieved to produce 100-200 μm particles called milliwheels (m-wheels). Once loaded with anti-TNF, these m-wheels release 10 to 80% of their payload over 1 week at a rate that depends on the cross-linking density and pH. A rotating magnetic field induces a torque on the m-wheels that results in rolling velocities greater than 500 μm/s on glass and mucus-secreting cells. The permeability of the TNF-challenged gut epithelial cell monolayers was rescued in the presence of anti-TNF carrying m-wheels, which both neutralized the TNF and created an impermeable patch over leaky cell junctions. With the ability to translate over mucosal surfaces at high speed, provide sustained release directly to the inflamed epithelium, and provide barrier rescue, m-wheels demonstrate a potential strategy to deliver therapeutic proteins for the treatment of IBD.
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Affiliation(s)
- Matthew
J. Osmond
- Department
of Bioengineering, University of Colorado
Denver, Anschutz Medical Campus, Aurora, Colorado 80045, United States
- Department
of Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Elizabeth Korthals
- Department
of Bioengineering, University of Colorado
Denver, Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - Coy J. Zimmermann
- Department
of Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Eric J. Roth
- Department
of Bioengineering, University of Colorado
Denver, Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - David W.M. Marr
- Department
of Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Keith B. Neeves
- Department
of Bioengineering, University of Colorado
Denver, Anschutz Medical Campus, Aurora, Colorado 80045, United States
- Department
of Pediatrics, Section of Hematology, Oncology, and Bone Marrow Transplant, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado 80045, United States
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2
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Jahanmir G, Lau CML, Yu Y, Chau Y. Stochastic Lattice-Based Modeling of Macromolecule Release from Degradable Hydrogel. ACS Biomater Sci Eng 2022; 8:4402-4412. [PMID: 36057096 DOI: 10.1021/acsbiomaterials.2c00505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A three-dimensional lattice-based model has been developed to describe the release of a macromolecular drug encapsulated in a degradable hydrogel. The degradation-induced network heterogeneity is considered by assigning varying diffusion coefficients to the lattice sites based on the fitted exponential node-diffusivity relationship. As time passes, due to the degradation of crosslink nodes, diffusivity values in lattice sites progress to lower values. To overcome the size limitation of the computational model and to compare it with experimental data, a scaling ratio based on the random walk equation is developed. The model was able to describe the experimental release data from chemically crosslinked dextran hydrogels. The results showed that the effect of the initial network and the chemistry of crosslink nodes (hydrolysis rate) on the drug release profile cannot be decoupled.
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Affiliation(s)
- Ghodsiehsadat Jahanmir
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
| | - Chi Ming Laurence Lau
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
| | - Yu Yu
- Pleryon Therapeutics, DBH Life Science Technology Park, 2028 Shenyan Road, Yantian, Shenzhen 518000, China
| | - Ying Chau
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong SAR, China.,The Hong Kong University of Science and Technology Shenzhen Institute, Shenzhen 518057, China
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3
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Braegelman AS, Ollier RC, Su B, Addonizio CJ, Zou L, Cole SL, Webber MJ. Macromolecular Solute Transport in Supramolecular Hydrogels Spanning Dynamic to Quasi-Static States. ACS APPLIED BIO MATERIALS 2022; 5:10.1021/acsabm.2c00165. [PMID: 35623099 PMCID: PMC10019485 DOI: 10.1021/acsabm.2c00165] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrogels prepared from supramolecular cross-linking motifs are appealing for use as biomaterials and drug delivery technologies. The inclusion of macromolecules (e.g., protein therapeutics) in these materials is relevant to many of their intended uses. However, the impact of dynamic network cross-linking on macromolecule diffusion must be better understood. Here, hydrogel networks with identical topology but disparate cross-link dynamics are explored. These materials are prepared from cross-linking with host-guest complexes of the cucurbit[7]uril (CB[7]) macrocycle and two guests of different affinity. Rheology confirms differences in bulk material dynamics arising from differences in cross-link thermodynamics. Fluorescence recovery after photobleaching (FRAP) provides insight into macromolecule diffusion as a function of probe molecular weight and hydrogel network dynamics. Together, both rheology and FRAP enable the estimation of the mean network mesh size, which is then related to the solute hydrodynamic diameters to further understand macromolecule diffusion. Interestingly, the thermodynamics of host-guest cross-linking are correlated with a marked deviation from classical diffusion behavior for higher molecular weight probes, yielding solute aggregation in high-affinity networks. These studies offer insights into fundamental macromolecular transport phenomena as they relate to the association dynamics of supramolecular networks. Translation of these materials from in vitro to in vivo is also assessed by bulk release of an encapsulated macromolecule. Contradictory in vitro to in vivo results with inverse relationships in release between the two hydrogels underscores the caution demanded when translating supramolecular biomaterials into application.
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Affiliation(s)
- Adam S. Braegelman
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
- University of Notre Dame, Bioengineering PhD Program, Notre Dame, IN 46556 USA
| | - Rachel C. Ollier
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
| | - Bo Su
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
| | - Christopher J. Addonizio
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
| | - Lei Zou
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
| | - Sara L. Cole
- University of Notre Dame, Integrated Imaging Facility, Notre Dame, IN 46556 USA
| | - Matthew J. Webber
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556 USA
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4
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Algal Polysaccharides-Based Hydrogels: Extraction, Synthesis, Characterization, and Applications. Mar Drugs 2022; 20:md20050306. [PMID: 35621958 PMCID: PMC9146341 DOI: 10.3390/md20050306] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/25/2022] [Accepted: 04/27/2022] [Indexed: 02/04/2023] Open
Abstract
Hydrogels are three-dimensional crosslinked hydrophilic polymer networks with great potential in drug delivery, tissue engineering, wound dressing, agrochemicals application, food packaging, and cosmetics. However, conventional synthetic polymer hydrogels may be hazardous and have poor biocompatibility and biodegradability. Algal polysaccharides are abundant natural products with biocompatible and biodegradable properties. Polysaccharides and their derivatives also possess unique features such as physicochemical properties, hydrophilicity, mechanical strength, and tunable functionality. As such, algal polysaccharides have been widely exploited as building blocks in the fabrication of polysaccharide-based hydrogels through physical and/or chemical crosslinking. In this review, we discuss the extraction and characterization of polysaccharides derived from algae. This review focuses on recent advances in synthesis and applications of algal polysaccharides-based hydrogels. Additionally, we discuss the techno-economic analyses of chitosan and acrylic acid-based hydrogels, drawing attention to the importance of such analyses for hydrogels. Finally, the future prospects of algal polysaccharides-based hydrogels are outlined.
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5
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Nanopore confinement and fluid behavior in nanocellulose–based hydro- and organogels. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2021. [DOI: 10.1016/j.carpta.2021.100111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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6
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Going deep inside bioactive-loaded nanocarriers through Nuclear Magnetic Resonance (NMR) spectroscopy. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.05.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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7
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Jahanmir G, Lau CML, Abdekhodaie MJ, Chau Y. Dual-Diffusivity Stochastic Model for Macromolecule Release from a Hydrogel. ACS APPLIED BIO MATERIALS 2020; 3:4208-4219. [DOI: 10.1021/acsabm.0c00293] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ghodsiehsadat Jahanmir
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, P.R. China
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, 11365-11155, Iran
| | - Chi Ming Laurence Lau
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, P.R. China
- The Hong Kong University of Science and Technology Shenzhen Institute, Shenzhen 518057, China
| | - Mohammad Jafar Abdekhodaie
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, 11365-11155, Iran
| | - Ying Chau
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, P.R. China
- The Hong Kong University of Science and Technology Shenzhen Institute, Shenzhen 518057, China
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8
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Chang HT, Heuer RA, Oleksijew AM, Coots KS, Roque CB, Nella KT, McGuire TL, Matsuoka AJ. An engineered three-dimensional stem cell niche in the inner ear by applying a nanofibrillar cellulose hydrogel with a sustained-release neurotrophic factor delivery system. Acta Biomater 2020; 108:111-127. [PMID: 32156626 PMCID: PMC7198367 DOI: 10.1016/j.actbio.2020.03.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 02/01/2020] [Accepted: 03/03/2020] [Indexed: 11/17/2022]
Abstract
Although the application of human embryonic stem cells (hESCs) in stem cell-replacement therapy remains promising, its potential is hindered by a low cell survival rate in post-transplantation within the inner ear. Here, we aim to enhance the in vitro and in vivo survival rate and neuronal differentiation of otic neuronal progenitors (ONPs) by generating an artificial stem cell niche consisting of three-dimensional (3D) hESC-derived ONP spheroids with a nanofibrillar cellulose hydrogel and a sustained-release brain-derivative neurotrophic factor delivery system. Our results demonstrated that the transplanted hESC-derived ONP spheroids survived and neuronally differentiated into otic neuronal lineages in vitro and in vivo and also extended neurites toward the bony wall of the cochlea 90 days after the transplantation without the use of immunosuppressant medication. Our data in vitro and in vivo presented here provide sufficient evidence that we have established a robust, reproducible protocol for in vivo transplantation of hESC-derived ONPs to the inner ear. Using our protocol to create an artificial stem cell niche in the inner ear, it is now possible to work on integrating transplanted hESC-derived ONPs further and also to work toward achieving functional auditory neurons generated from hESCs. Our findings suggest that the provision of an artificial stem cell niche can be a future approach to stem cell-replacement therapy for inner-ear regeneration. STATEMENT OF SIGNIFICANCE: Inner ear regeneration utilizing human embryonic stem cell-derived otic neuronal progenitors (hESC-derived ONPs) has remarkable potential for treating sensorineural hearing loss. However, the local environment of the inner ear requires a suitable stem cell niche to allow hESC-derived ONP engraftment as well as neuronal differentiation. To overcome this obstacle, we utilized three-dimensional spheroid formation (direct contact), nanofibrillar cellulose hydrogel (extracellular matrix), and a neurotrophic factor delivery system to artificially create a stem cell niche in vitro and in vivo. Our in vitro and in vivo data presented here provide sufficient evidence that we have established a robust, reproducible protocol for in vivo transplantation of hESC-derived ONPs to the inner ear.
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Affiliation(s)
- Hsiang-Tsun Chang
- Department of Otolaryngology and Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Rachel A Heuer
- Department of Otolaryngology and Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Andrew M Oleksijew
- Department of Otolaryngology and Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Kyle S Coots
- Department of Otolaryngology and Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Christian B Roque
- Department of Otolaryngology and Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Kevin T Nella
- Department of Otolaryngology and Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Tammy L McGuire
- Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago IL 60611, USA
| | - Akihiro J Matsuoka
- Department of Otolaryngology and Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL 60201, USA; Hugh Knowles Center for Hearing Research, Northwestern University, Evanston, IL 60201, USA.
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9
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Xiang W, Preisig N, Ketola A, Tardy BL, Bai L, Ketoja JA, Stubenrauch C, Rojas OJ. How Cellulose Nanofibrils Affect Bulk, Surface, and Foam Properties of Anionic Surfactant Solutions. Biomacromolecules 2019; 20:4361-4369. [PMID: 31478654 DOI: 10.1021/acs.biomac.9b01037] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We study the generation and decay of aqueous foams stabilized by sodium dodecyl sulfate (SDS) in the presence of unmodified cellulose nanofibrils (CNF). Together with the rheology of aqueous suspensions containing CNF and SDS, the interfacial/colloidal interactions are determined by quartz crystal microgravimetry with dissipation monitoring, surface plasmon resonance, and isothermal titration calorimetry. The results are used to explain the properties of the air/water interface (interfacial activity and dilatational moduli determined from oscillating air bubbles) and of the bulk (steady-state flow, oscillatory shear, and capillary thinning). These properties are finally correlated to the foamability and to the foam stability. The latter was studied as a function of time by monitoring the foam volume, the liquid fraction, and the bubble size distribution. The shear-thinning effect of CNF is found to facilitate foam formation at SDS concentrations above the critical micelle concentration (cSDS ≥ cmc). Compared with foams stabilized by pure SDS, the presence of CNF enhances the viscosity and elasticity of the continuous phase as well as of the air/water interface. The CNF-containing foams have higher liquid fractions, larger initial bubble sizes, and better stability. Due to charge screening effects caused by sodium counter ions and depletion attraction caused by SDS micelles, especially at high SDS concentrations, CNF forms aggregates in the Plateau borders and nodes of the foam, thus slowing down liquid drainage and bubble growth and improving foam stability. Overall, our findings advance the understanding of the role of CNF in foam generation and stabilization.
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Affiliation(s)
- Wenchao Xiang
- Bio-based Colloids and Materials, Department of Bioproducts and Biosystems, School of Chemical Engineering , Aalto University , P. O. Box 16300, FI-00076 Aalto, Espoo , Finland
| | - Natalie Preisig
- Universität Stuttgart , Institut für Physikalische Chemie , Pfaffenwaldring 55 , 70569 Stuttgart , Germany
| | - Annika Ketola
- VTT Technical Research Centre of Finland Ltd. , P. O. Box 1603, FI-40101 Jyväskylä , Finland
| | - Blaise L Tardy
- Bio-based Colloids and Materials, Department of Bioproducts and Biosystems, School of Chemical Engineering , Aalto University , P. O. Box 16300, FI-00076 Aalto, Espoo , Finland
| | - Long Bai
- Bio-based Colloids and Materials, Department of Bioproducts and Biosystems, School of Chemical Engineering , Aalto University , P. O. Box 16300, FI-00076 Aalto, Espoo , Finland
| | - Jukka A Ketoja
- VTT Technical Research Centre of Finland Ltd. , P. O. Box 1000, FI-02044 Espoo , Finland
| | - Cosima Stubenrauch
- Universität Stuttgart , Institut für Physikalische Chemie , Pfaffenwaldring 55 , 70569 Stuttgart , Germany
| | - Orlando J Rojas
- Bio-based Colloids and Materials, Department of Bioproducts and Biosystems, School of Chemical Engineering , Aalto University , P. O. Box 16300, FI-00076 Aalto, Espoo , Finland
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10
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In vitro investigation of the influence of nano-cellulose on starch and milk digestion and mineral adsorption. Int J Biol Macromol 2019; 137:1278-1285. [DOI: 10.1016/j.ijbiomac.2019.06.194] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/18/2019] [Accepted: 06/24/2019] [Indexed: 11/19/2022]
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11
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In vitro investigation of the influence of nano-fibrillated cellulose on lipid digestion and absorption. Int J Biol Macromol 2019; 139:361-366. [PMID: 31369785 DOI: 10.1016/j.ijbiomac.2019.07.189] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 07/17/2019] [Accepted: 07/27/2019] [Indexed: 12/15/2022]
Abstract
Nanocellulose, including nano-fibrillated cellulose (NFC), has been a topic of significant interest and a number of studies have focused on using it for the fabrication of stable oil-in-water emulsions. However, limited studies have been performed to understand the potential influence of NFC on lipid digestion and absorption. In this study, a simulated digestion model, consisting of salivary, gastric and intestinal digestion phases, was used to investigate the effects of NFC on lipid digestion and absorption. To better understand the mechanisms behind, the effects of NFC on lipase activity, micellar solubility of cholesterol and bile acid diffusion were studied in addition to the cholesterol adsorption capacity of NFC, with conventional cellulose as a comparison. Results showed that NFC slightly reduced lipase activity, but NFC or cellulose at concentrations up to 1.1% (w/w) did not significantly influence lipid digestion under simulated intestinal conditions. Moreover, NFC showed greater bile acid retardation effect than cellulose, and slightly higher cholesterol adsorption capacity probably due to its larger specific surface area. Nonetheless, NFC did not significantly affect micellar solubility of cholesterol. These results suggest that NFC, when added into fat-rich foods, may have health benefits via its viscosity effect and retardation effect on bile acid absorption.
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12
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Characterization of lipid emulsions during in vitro digestion in the presence of three types of nanocellulose. J Colloid Interface Sci 2019; 545:317-329. [DOI: 10.1016/j.jcis.2019.03.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/07/2019] [Accepted: 03/09/2019] [Indexed: 12/27/2022]
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13
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Influence of nanocellulose on in vitro digestion of whey protein isolate. Carbohydr Polym 2019; 210:399-411. [DOI: 10.1016/j.carbpol.2019.01.071] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 01/19/2019] [Accepted: 01/19/2019] [Indexed: 12/31/2022]
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14
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Wisniewska MA, Seland JG, Wang W. Determining the scaling of gel mesh size with changing crosslinker concentration using dynamic swelling, rheometry, and PGSE NMR spectroscopy. J Appl Polym Sci 2018. [DOI: 10.1002/app.46695] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | | | - Wei Wang
- Department of Chemistry; University of Bergen; Bergen 5007 Norway
- Centre for Pharmacy; University of Bergen; Bergen 5020 Norway
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15
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Schmitt J, Calabrese V, da Silva MA, Lindhoud S, Alfredsson V, Scott JL, Edler KJ. TEMPO-oxidised cellulose nanofibrils; probing the mechanisms of gelation via small angle X-ray scattering. Phys Chem Chem Phys 2018; 20:16012-16020. [PMID: 29850680 DOI: 10.1039/c8cp00355f] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The structure of dispersions of TEMPO-oxidised cellulose nanofibrils (OCNF), at various concentrations, in water and in NaCl aqueous solutions, was probed using small angle X-ray scattering (SAXS). OCNF are modelled as rod-like particles with an elliptical cross-section of 10 nm and a length greater than 100 nm. As OCNF concentration increases above 1.5 wt%, repulsive interactions between fibrils are evidenced, modelled by the interaction parameter νRPA > 0. This corresponds to gel-like behaviour, where G' > G'' and the storage modulus, G', shows weak frequency dependence. Hydrogels can also be formed at OCNF concentration of 1 wt% in 0.1 M NaCl(aq). SAXS patterns shows an increase of the intensity at low angle that is modelled by attractive interactions (νRPA < 0) between OCNF, arising from the screening of the surface charge of the fibrils. Results are supported by ζ potential and cryo-TEM measurements.
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Affiliation(s)
- Julien Schmitt
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
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16
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Gosecki M, Kazmierski S, Gosecka M. Diffusion-Controllable Biomineralization Conducted In Situ in Hydrogels Based on Reversibly Cross-Linked Hyperbranched Polyglycidol. Biomacromolecules 2017; 18:3418-3431. [DOI: 10.1021/acs.biomac.7b01071] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Mateusz Gosecki
- Centre of Molecular and Macromolecular
Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Lodz, Poland
| | - Slawomir Kazmierski
- Centre of Molecular and Macromolecular
Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Lodz, Poland
| | - Monika Gosecka
- Centre of Molecular and Macromolecular
Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Lodz, Poland
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17
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Munoz SZ, Zhadan R, Acosta E. Design of nonionic micelle-laden polysaccharide hydrogels for controlled delivery of hydrophobic drugs. Int J Pharm 2017; 526:455-465. [DOI: 10.1016/j.ijpharm.2017.04.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 04/24/2017] [Accepted: 04/25/2017] [Indexed: 10/19/2022]
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18
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Sheikhi A, van de Ven TGM. Trapping It Softly: Ultrasoft Zirconium Metallogels for Macromolecule Entrapment and Reconfiguration. ACS Macro Lett 2016; 5:904-908. [PMID: 35607220 DOI: 10.1021/acsmacrolett.6b00447] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Trapping nanosized drugs in ultrasoft, shear-thinning hydrogels with large pores is of particular interest, yet a persistent challenge in nanomedicine due to the lack of hydrodynamic confinement. Engineering molecular interactions between a macromolecule and a supramolecular gel may address this shortcoming, providing a key route to develop advanced drug carriers without compromising matrix elasticity. Here, we show that ultrasoft zirconium-based metallogels are able to trap and reconfigure model nanodrugs (e.g., dextran) through complexation and hydrogen bonding. The diffusion coefficients of dextran molecules (Mw ∼ 10-2000 kDa, a ∼ 2-20 nm) in zirconium carbonate (ZC) metallogels (G' < 30 Pa) were measured by pulsed field gradient nuclear magnetic resonance (PFGNMR), which revealed the coexistence of hindered and enhanced collective diffusion regimes for the first time. This work may pave the way toward designing next generation ultrasoft drug carriers and functional templates to control biomacromolecular processes, such as protein folding.
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Affiliation(s)
- Amir Sheikhi
- Department of Chemistry,
Centre for Self-Assembled Chemical Structures, and Pulp and Paper
Research Centre, McGill University, Montreal, 3420 University
Street, QC H3A
2A7, Canada
| | - Theo G. M. van de Ven
- Department of Chemistry,
Centre for Self-Assembled Chemical Structures, and Pulp and Paper
Research Centre, McGill University, Montreal, 3420 University
Street, QC H3A
2A7, Canada
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