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Ittycheri A, Biniszkiewicz B, Rodriguez C, German GK. Plastocapillarity: Partial and full Newtonian drop embedding into immiscible yield stress substrates. J Colloid Interface Sci 2024; 667:617-623. [PMID: 38657545 DOI: 10.1016/j.jcis.2024.04.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/25/2024] [Accepted: 04/15/2024] [Indexed: 04/26/2024]
Abstract
HYPOTHESIS Recent advances have been made in elastocapillarity; reversible 3D deformations of solid substrates with low elastic moduli from the surface tension of deposited drops. This study explores permanent deformations caused by liquid drops on immiscible yield stress substrates. We hypothesize that the substrate's rheological properties play a major role in determining the shape and stability of the drop-substrate interface, and govern partial or full embedding into the substrate. EXPERIMENTS Substrate yield stress magnitudes are modified through altering the mixture ratios of petroleum jelly to paraffin oil. Water drops are deposited on substrates and deformation profiles of the deformed interface are quantified. FINDINGS Above a critical Bingham-Capillary number, which characterizes the ratio of yield stress magnitude to surface tension, deposited water drops deform the substrate surface permanently, but minimally. Below this value, drops become increasingly embedded as the substrate yield stress magnitude decreases, with larger indentation depths and increased circumferential ridge heights. With sufficiently low yield stress magnitudes, where surface tension forces dominate over yield stress forces, the plastically deformed ridges fully encapsulate the liquid drop surface, resulting in full drop embedding within the substrate. These results advance knowledge of interfacial wetting on soft yield stress substrates and has implications for binary fluids, functional materials, and new drug delivery systems.
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Affiliation(s)
- A Ittycheri
- Department of Biomedical Engineering, Binghamton University, State University of New York, Binghamton, NY, USA
| | - B Biniszkiewicz
- Department of Biomedical Engineering, Binghamton University, State University of New York, Binghamton, NY, USA
| | - C Rodriguez
- Department of Biomedical Engineering, Binghamton University, State University of New York, Binghamton, NY, USA
| | - G K German
- Department of Biomedical Engineering, Binghamton University, State University of New York, Binghamton, NY, USA.
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Basak S, Mukherjee I, Das TK. Injectable biocompatible RAFT mediated nitroxide nanogels: A robust ROS-reduction antioxidant approach. Colloids Surf B Biointerfaces 2024; 236:113790. [PMID: 38367288 DOI: 10.1016/j.colsurfb.2024.113790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/20/2024] [Accepted: 02/05/2024] [Indexed: 02/19/2024]
Abstract
This work introduces novel nitroxide-based nanogels (NGs) crafted through controlled RAFT (Reversible Addition Fragmentation chain Transfer) polymerization, showcasing over 85% improved shelf-life compared to native superoxide dismutase (SOD) enzymes. These 30-40 nm NGs hold great promise for injectable delivery, effectively reducing foam cell formation and displaying potent antioxidant behavior against various reactive oxygen species (ROS), revolutionizing antioxidant therapy. Featuring a meticulously designed core-shell structure via precise RAFT polymerization, these NGs mimic SOD enzymatic activity with nitroxide-based antioxidants, providing unprecedented defense against ROS. Combining methacrylated 2,2,6,6-Tetramethyl-4-piperidyl methacrylate (PMA) and Glycidyl methacrylate (GMA) monomers with precisely synthesized nitroxyl radicals results in exceptional properties. Validated through comprehensive analytical methods, these NGs exhibit remarkable stability, halting foam cell formation even at high concentrations, and demonstrate notable biocompatibility. Their ability to protect low density lipoprotein (LDL) from oxidation for up to a month positions them at the forefront of combating cardiovascular diseases, especially atherosclerosis. This study pioneers injectable antioxidant therapy, offering an innovative approach to cardiovascular ailments. Targeting narrow plaques signifies a promising intervention, reshaping cardiovascular disease treatments. It highlights the potential of advanced drug delivery in biomedicine, promising more effective cardiovascular disease treatments.
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Affiliation(s)
- Suman Basak
- Department of Health Technology, DTU Health Tech, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark; Department of Chemistry, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
| | - Ishita Mukherjee
- Department of Inorganic and Physical Chemistry (IPC), Indian Institute of Science (IISc), Bangalore 560012, India
| | - Tushar Kanti Das
- Institute of Physics - Center for Science and Education, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland.
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Cirillo G, Curcio M, Oliviero Rossi C, De Filpo G, Baratta M, De Luca M, Iemma F, Nicoletta FP. Curcumin-Sodium Alginate and Curcumin-Chitosan Conjugates as Drug Delivery Systems: An Interesting Rheological Behaviour. Molecules 2023; 28:5893. [PMID: 37570862 PMCID: PMC10420803 DOI: 10.3390/molecules28155893] [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: 06/26/2023] [Revised: 07/31/2023] [Accepted: 08/03/2023] [Indexed: 08/13/2023] Open
Abstract
The conjugation of polyphenols is a valuable strategy with which to confer tailored properties to polymeric materials of biomedical interest. Within this investigation, we aim to explore the possibility to use this synthetic approach to increase the viscosity of conjugates, thus allowing the release of a loaded therapeutic to be better controlled over time than in neat polyphenols. Curcumin (CUR) was conjugated to sodium alginate (CA) and chitosan (CS) with functionalisation degrees of 9.2 (SA-CUR) and 15.4 (CS-CUR) mg g-1. Calorimetric analyses showed higher degrees of chain rigidity upon conjugation, with a shift of the degradation peaks to higher temperatures (from 239 to 245 °C and from 296 to 303 °C for SA-CUR and CS-CUR, respectively). Rheological analyses were used to prove the enhanced interconnection between the polymer chains in the conjugates, confirmed by the weak gel parameters, A and z. Moreover, the typical non-Newtonian behaviour of the high-molecular-weight polysaccharides was recorded, together with an enhancement of the activation energy, Ea, in CS-CUR vs. CS (opposite behaviour recorded for SA-CUR vs. SA). The evaluation of the delivery performance (of Doxorubicin as a model drug) showed sustained release profiles, opening opportunities for the development of controlled delivery systems.
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Affiliation(s)
- Giuseppe Cirillo
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende (CS), Italy; (M.C.); (M.D.L.); (F.I.); (F.P.N.)
| | - Manuela Curcio
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende (CS), Italy; (M.C.); (M.D.L.); (F.I.); (F.P.N.)
| | - Cesare Oliviero Rossi
- Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Rende (CS), Italy; (C.O.R.); (G.D.F.); (M.B.)
| | - Giovanni De Filpo
- Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Rende (CS), Italy; (C.O.R.); (G.D.F.); (M.B.)
| | - Mariafrancesca Baratta
- Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Rende (CS), Italy; (C.O.R.); (G.D.F.); (M.B.)
| | - Michele De Luca
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende (CS), Italy; (M.C.); (M.D.L.); (F.I.); (F.P.N.)
| | - Francesca Iemma
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende (CS), Italy; (M.C.); (M.D.L.); (F.I.); (F.P.N.)
| | - Fiore Pasquale Nicoletta
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende (CS), Italy; (M.C.); (M.D.L.); (F.I.); (F.P.N.)
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Singh J, Steele TWJ, Lim S. Bacterial cellulose adhesive patches designed for soft mucosal interfaces. BIOMATERIALS ADVANCES 2022; 144:213174. [PMID: 36428212 DOI: 10.1016/j.bioadv.2022.213174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/12/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022]
Abstract
The wet environment in the oral cavity is challenging for topical disease management approaches. The compromised material properties leading to weak adhesion and short retention (<8 h) in such environment result in frequent reapplication of the therapeutics. Composites of bacterial cellulose (BC) and carbene-based bioadhesives attempt to address these shortcomings. Previous designs comprised of aqueous formulations. The current design, for the first time, presents dry, shelf-stable cellulose patches for convenient ready-to-use application. The dry patches simultaneously remove tissue surface hydration while retaining carbene-based photocuring and offers on-demand adhesion. The dry patch prototypes are optimized by controlling BC/adhesive mole ratios and dehydration technique. The adhesion strength is higher than commercial denture adhesives on soft mucosal tissues. The structural integrity is maintained for a minimum of 7 days in aqueous environment. The patches act as selective nanoporous barrier against bacteria while allowing permeation of proteins. The results support the application of BC-based adhesive patches as a flexible platform for wound dressings, drug depots, or combination thereof.
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Affiliation(s)
- Juhi Singh
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335, Singapore; School of Chemical and Biomedical Engineering, 70 Nanyang Drive, Block N1.3, Nanyang Technological University, Singapore 637457, Singapore.
| | - Terry W J Steele
- School of Materials Science and Engineering (MSE), Division of Materials Technology, Nanyang Technological University (NTU), Singapore 639798, Singapore.
| | - Sierin Lim
- School of Chemical and Biomedical Engineering, 70 Nanyang Drive, Block N1.3, Nanyang Technological University, Singapore 637457, Singapore.
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Ahmad MZ, Ahmad J, Alasmary MY, Akhter S, Aslam M, Pathak K, Jamil P, Abdullah M. Nanoemulgel as an approach to improve the biopharmaceutical performance of lipophilic drugs: Contemporary research and application. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Singh J, Tan NCS, Mahadevaswamy UR, Chanchareonsook N, Steele TWJ, Lim S. Bacterial cellulose adhesive composites for oral cavity applications. Carbohydr Polym 2021; 274:118403. [PMID: 34702445 DOI: 10.1016/j.carbpol.2021.118403] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/22/2021] [Accepted: 07/04/2021] [Indexed: 11/19/2022]
Abstract
Topical approaches to oral diseases require frequent dosing due to limited retention time. A mucoadhesive drug delivery platform with extended soft tissue adhesion capability of up to 7 days is proposed for on-site management of oral wound. Bacterial cellulose (BC) and photoactivated carbene-based bioadhesives (PDz) are combined to yield flexible film platform for interfacing soft tissues in dynamic, wet environments. Structure-activity relationships evaluate UV dose and hydration state with respect to adhesive strength on soft tissue mimics. The bioadhesive composite has an adhesion strength ranging from 7 to 17 kPa and duration exceeding 48 h in wet conditions under sustained shear forces, while other mucoadhesives based on hydrophilic macromolecules exhibit adhesion strength of 0.5-5 kPa and last only a few hours. The work highlights the first evaluation of BC composites for mucoadhesive treatments in the buccal cavity.
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Affiliation(s)
- Juhi Singh
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335, Singapore; School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, Singapore 637457, Singapore.
| | - Nigel C S Tan
- School of Materials Science and Engineering, Division of Materials Technology, Nanyang Technological University, 50 Nanyang Avenue, Block N4.1, Singapore 639798, Singapore.
| | - Usha Rani Mahadevaswamy
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, Singapore 637457, Singapore.
| | - Nattharee Chanchareonsook
- Department of Oral and Maxillofacial Surgery, National Dental Centre Singapore (NDCS), 5 Second Hospital Avenue, Singapore 16893, Singapore
| | - Terry W J Steele
- School of Materials Science and Engineering, Division of Materials Technology, Nanyang Technological University, 50 Nanyang Avenue, Block N4.1, Singapore 639798, Singapore.
| | - Sierin Lim
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335, Singapore; School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, Singapore 637457, Singapore.
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Silva AF, Pimenta F, Alves MA, Oliveira MSN. Flow dynamics of vitreous humour during saccadic eye movements. J Mech Behav Biomed Mater 2020; 110:103860. [PMID: 32755799 DOI: 10.1016/j.jmbbm.2020.103860] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 02/20/2020] [Accepted: 05/11/2020] [Indexed: 10/24/2022]
Abstract
In this work, we reveal the flow dynamics of Vitreous Humour (VH) gel and liquid phases during saccadic movements of the eye, considering the biofluids viscoelastic character as well as realistic eye chamber geometry and taking into account the saccade profile. We quantify the differences in the flow dynamics of VH gel and liquid phases using viscoelastic rheological models that are able to model the VH shear rheology, considering different amplitudes of saccadic movements (10∘, 20∘, 30∘ and 40∘). For this purpose, the computational fluid dynamics (CFD) open source software OpenFOAM® was used. The results portray a distinct flow behaviour for the VH gel and liquid phases, with inertial effects being more significant for the VH liquid phase. Moreover, the Wall Shear Stress (WSS) values produced by the VH gel phase are more than twice of those generated by the VH liquid phase. Results also show that for different amplitudes of eye movement both the velocity magnitude in the vitreous cavity and the shear stresses on the cavity walls rise with increasing saccadic movement displacement.
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Affiliation(s)
- Andreia F Silva
- James Weir Fluids Laboratory, Department of Mechanical and Aerospace Engineering, University of Strathclyde, Glasgow, G1 1XJ, UK; School of Physics and Astronomy, University of Edinburgh, King's Buildings, Mayfield Road, Edinburgh, EH9 3JL, UK.
| | - Francisco Pimenta
- Departamento de Engenharia Química, CEFT, Faculdade de Engenharia, Universidade do Porto, 4200-465, Porto, Portugal
| | - Manuel A Alves
- Departamento de Engenharia Química, CEFT, Faculdade de Engenharia, Universidade do Porto, 4200-465, Porto, Portugal
| | - Mónica S N Oliveira
- James Weir Fluids Laboratory, Department of Mechanical and Aerospace Engineering, University of Strathclyde, Glasgow, G1 1XJ, UK
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Pagano C, Perioli L, Calarco P, Di Michele A, Tiralti MC, Ricci M. New Technological Approach for Glycyrrethic Acid Oral and Topical Administration. Curr Pharm Des 2020; 26:664-674. [DOI: 10.2174/1381612826666191226112249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 12/18/2019] [Indexed: 02/05/2023]
Abstract
Background:
18β- glycyrrhetinic acid (Gly) is the major bioactive component of licorice roots and
rhizomes of the Glycyrrhiza glabra species. It shows many activities such as antiviral, anti-inflammatory, antioxidant,
antimicrobial, and antifungal, however, its use in the health field is very limited due to the low water solubility.
Methods:
This paper deals with the development of a new technological approach for Gly dissolution rate enhancement.
It consists of Gly intercalation (guest) in the interlamellar spaces between the inorganic spaces (host)
of the anionic clays “hydrotalcites” (HTlc) to obtain hybrids MgAl-HTlc-Gly and ZnAl-HTlc-Gly. Gly can find
applications in both systemic and local therapies, thus advantages of the use of the hybrids in these two fields
were investigated.
Results:
Gly dissolution rate from hybrids in the intestinal environment, site in which it is preferentially absorbed,
resulted enhanced (ZnAl-HTlc-Gly > MgAl-HTlc-Gly) compared to the crystalline form, thereby, making them
suitable for oral administration as dry powder in hard capsules.
:
For a local therapy, bioadhesive, vaginal emulgels loaded with the hybrids were developed. These showed suitable
mucoadhesive property to the vaginal mucosa, necessary to prolong the residence time in the application site.
The emulgel containing ZnAl-HTlc-Gly showed a faster and higher release profile than that containing MgAl-
HTlc-Gly.
Conclusions:
The obtained results suggest that Gly intercalation into HTlc, especially in ZnAl-HTlc, allows to
enhance Gly dissolution when the hybrids are formulated both as oral or topical products.
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Affiliation(s)
- Cinzia Pagano
- Department of Pharmaceutical Sciences, University of Perugia, via del liceo 1 - 06123, Perugia, Italy
| | - Luana Perioli
- Department of Pharmaceutical Sciences, University of Perugia, via del liceo 1 - 06123, Perugia, Italy
| | - Paola Calarco
- Department of Pharmaceutical Sciences, University of Perugia, via del liceo 1 - 06123, Perugia, Italy
| | - Alessandro Di Michele
- Department of Physics and Geology, University of Perugia, via Pascoli - 06123 Perugia, Italy
| | - Maria C. Tiralti
- Department of Pharmaceutical Sciences, University of Perugia, via del liceo 1 - 06123, Perugia, Italy
| | - Maurizio Ricci
- Department of Pharmaceutical Sciences, University of Perugia, via del liceo 1 - 06123, Perugia, Italy
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