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Azeem MK, Islam A, Khan RU, Rasool A, Anees Ur Rehman Qureshi M, Rizwan M, Shuib RK, Rehman A, Sadiqa A. Guar gum/poly ethylene glycol/graphene oxide environmentally friendly hybrid hydrogels for controlled release of boron micronutrient. R Soc Open Sci 2023; 10:231157. [PMID: 38094268 PMCID: PMC10716656 DOI: 10.1098/rsos.231157] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 11/21/2023] [Indexed: 01/11/2024]
Abstract
The present study was aimed at synthesis of polymeric hydrogels for controlled boron (B) release, as B deficiency is a major factor that decreases crops yield. Thus, graphene oxide incorporated guar gum and poly (ethylene glycol) hydrogels were prepared using the Solution Casting method for boron release. 3-Glycidyloxypropyl trimethoxysilane (GLYMOL) was used as a cross-linker. Characterizations of hydrogels were carried out by Fourier Transform Infrared Spectroscopy (FTIR), Thermo-Gravimetric Analysis and Scanning Electron scope. The FTIR outcomes confirmed the existence of functional groups, bindings and development of hydrogel frameworks from incorporated components. The quantity of GLYMOL directly increased the thermal stability and water retention but decreased the swelling %. The maximum swelling for the hydrogel formulations was observed at pH 7. The addition of GLYMOL changed the diffusion from quasi-Fickcian to non-Fickcian diffusion. The maximum swelling quantities of 3822% and 3342% were exhibited by GPP (control) and GPP-8 in distilled water, respectively. Boron release was determined in distilled water and sandy soil by azomethine-H test using UV-Visible spectrophotometer while 85.11% and 73.65% boron was released from BGPP-16, respectively. In short, water retentive, water holding capacities, swelling performances, biodegradability and swelling/deswelling features would offer an ideal platform for boron release in sustained agricultural applications.
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Affiliation(s)
- Muhammad Khalid Azeem
- Institute of Polymer and Textile Engineering, University of the Punjab, Lahore, Punjab, Pakistan
| | - Atif Islam
- Institute of Polymer and Textile Engineering, University of the Punjab, Lahore, Punjab, Pakistan
| | - Rafi Ullah Khan
- Institute of Chemical Engineering and Technology, University of the Punjab, Lahore, Punjab, Pakistan
| | - Atta Rasool
- School of Chemistry, University of the Punjab, Lahore, Punjab, Pakistan
| | | | - Muhammad Rizwan
- Department of Chemistry, University of Lahore 54000, Pakistan
| | - Raa Khimi Shuib
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, 14300, Penang, Malaysia
| | - Abdul Rehman
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, 14300, Penang, Malaysia
- Department of Polymer Engineering, National Textile University, Karachi campus, 74900, Karachi, Pakistan
| | - Ayesha Sadiqa
- Department of Chemistry, University of Lahore 54000, Pakistan
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Brunette MA, Kinnear HM, Hashim PH, Flanagan CL, Day JR, Cascalho M, Padmanabhan V, Shikanov A. Human Ovarian Follicles Xenografted in Immunoisolating Capsules Survive Long Term Implantation in Mice. Front Endocrinol (Lausanne) 2022; 13:886678. [PMID: 35721740 PMCID: PMC9205207 DOI: 10.3389/fendo.2022.886678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/15/2022] [Indexed: 01/25/2023] Open
Abstract
Female pediatric cancer survivors often develop Premature Ovarian Insufficiency (POI) owing to gonadotoxic effects of anticancer treatments. Here we investigate the use of a cell-based therapy consisting of human ovarian cortex encapsulated in a poly-ethylene glycol (PEG)-based hydrogel that replicates the physiological cyclic and pulsatile hormonal patterns of healthy reproductive-aged women. Human ovarian tissue from four donors was analyzed for follicle density, with averages ranging between 360 and 4414 follicles/mm3. Follicles in the encapsulated and implanted cryopreserved human ovarian tissues survived up to three months, with average follicle densities ranging between 2 and 89 follicles/mm3 at retrieval. We conclude that encapsulation of human ovarian cortex in PEG-based hydrogels did not decrease follicle survival after implantation in mice and was similar to non-encapsulated grafts. Furthermore, this approach offers the means to replace the endocrine function of the ovary tissue in patients with POI.
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Affiliation(s)
- Margaret A. Brunette
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States
| | - Hadrian M. Kinnear
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, United States
- Medical Scientist Training Program, University of Michigan, Ann Arbor, MI, United States
| | - Prianka H. Hashim
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, United States
| | - Colleen L. Flanagan
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States
| | - James R. Day
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States
| | - Marilia Cascalho
- Department of Surgery, University of Michigan, Ann Arbor, MI, United States
- Department of Microbiology & Immunology, University of Michigan, Ann Arbor, MI, United States
| | - Vasantha Padmanabhan
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, United States
- Department of Pediatrics & Communicable Diseases, University of Michigan, Ann Arbor, MI, United States
| | - Ariella Shikanov
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, United States
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, United States
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MacCuaig WM, Samykutty A, Foote J, Luo W, Filatenkov A, Li M, Houchen C, Grizzle WE, McNally LR. Toxicity Assessment of Mesoporous Silica Nanoparticles upon Intravenous Injection in Mice: Implications for Drug Delivery. Pharmaceutics 2022; 14:pharmaceutics14050969. [PMID: 35631554 PMCID: PMC9148138 DOI: 10.3390/pharmaceutics14050969] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/26/2022] [Accepted: 04/27/2022] [Indexed: 12/04/2022] Open
Abstract
Nanoparticles are popular tools utilized to selectively deliver drugs and contrast agents for identification and treatment of disease. To determine the usefulness and translational potential of mesoporous silica nanoparticles (MSNs), further evaluations of toxicity are required. MSNs are among the most utilized nano-delivery systems due to ease of synthesis, pore structure, and functionalization. This study aims to elucidate toxicity as a result of intravenous injection of 25 nm MSNs coated with chitosan (C) or polyethylene glycol (PEG) in mice. Following acute and chronic injections, blood was evaluated for standard blood chemistry and complete blood count analyses. Blood chemistry results primarily indicated that no abnormalities were present following acute or chronic injections of MSNs, or C/PEG-coated MSNs. After four weekly administered treatments, vital organs showed minor exacerbation of pre-existing lesions in the 35KPEG-MSN and moderate exacerbation of pre-existing lesions in uncoated MSN and 2KPEG-MSN treatment groups. In contrast, C-MSN treatment groups had minimal changes compared to controls. This study suggests 25 nm MSNs coated with chitosan should elicit minimal toxicity when administered as either single or multiple intravenous injections, but MSNs coated with PEG, especially 2KPEG may exacerbate pre-existing vascular conditions. Further studies should evaluate varying sizes and types of nanoparticles to provide a better overall understanding on the relation between nanoparticles and in vivo toxicity.
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Affiliation(s)
- William M. MacCuaig
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK 73104, USA; (W.M.M.); (A.S.); (W.L.); (A.F.); (M.L.); (C.H.)
- Department of Biomedical Engineering, University of Oklahoma, Norman, OK 73109, USA
| | - Abhilash Samykutty
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK 73104, USA; (W.M.M.); (A.S.); (W.L.); (A.F.); (M.L.); (C.H.)
| | - Jeremy Foote
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Wenyi Luo
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK 73104, USA; (W.M.M.); (A.S.); (W.L.); (A.F.); (M.L.); (C.H.)
- Department of Pathology, Oklahoma Health Science Center, Oklahoma City, OK 73104, USA
| | - Alexander Filatenkov
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK 73104, USA; (W.M.M.); (A.S.); (W.L.); (A.F.); (M.L.); (C.H.)
- Department of Pathology, Oklahoma Health Science Center, Oklahoma City, OK 73104, USA
| | - Min Li
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK 73104, USA; (W.M.M.); (A.S.); (W.L.); (A.F.); (M.L.); (C.H.)
- Department of Medicine, Oklahoma Health Science Center, Oklahoma City, OK 73049, USA
| | - Courtney Houchen
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK 73104, USA; (W.M.M.); (A.S.); (W.L.); (A.F.); (M.L.); (C.H.)
- Department of Medicine, Oklahoma Health Science Center, Oklahoma City, OK 73049, USA
| | - William E. Grizzle
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Lacey R. McNally
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK 73104, USA; (W.M.M.); (A.S.); (W.L.); (A.F.); (M.L.); (C.H.)
- Department of Surgery, Oklahoma Health Science Center, Oklahoma City, OK 73104, USA
- Correspondence:
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Abdellatif AAH, Mohammed AM, Zayed G, El-Rasoul SA, Almawash S, Safwat MA, Osman SK. Cyclodextrin/Adamantane-Grafted Polyethylene Glycol-Based Self-assembling Constructs for Topical Delivery of Ketorolac Tromethamine: Formulation, Characterization, and In Vivo Studies. AAPS PharmSciTech 2022; 23:45. [PMID: 34981280 DOI: 10.1208/s12249-021-02188-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 11/29/2021] [Indexed: 01/02/2023] Open
Abstract
Topical formulation of non-steroidal anti-inflammatory drugs (NSAIDs) exhibits many advantages over the oral administration route, such as avoiding the direct effect on GIT and avoiding the poor oral bioavailability of such drugs. Our study aims to develop a new self-assembling construct based on the hydrophobic interaction between adamantane terminated poly (ethylene glycol) polymers and polymerized β-cyclodextrin. The viscous constructs were developed from direct mixing of host and guest polymer solutions, indicating spontaneous formation without cross-linkers. The modified system was evaluated by different analyses, including X-ray diffractometry, electron microscopy, isothermal titration calorimetry, and rheological analysis. Moreover, such a system's ability for drug loading and release was investigated via the in vitro release of ketorolac tromethamine (KT) as a model of NSAIDs. Finally, the prepared formulas were applied on a rat paw edema model to prove the enhanced anti-inflammatory activities. The obtained results indicated that the modified constructs have a rubbery porous structure with an amorphous nature. Also, from rheological results, the modified system exhibited a viscous behavior with higher loss modulus (G″) compared with storage (G'). The inclusion complexation between cyclodextrin and adamantane moieties was proved by the recorded high binding constants with a 1:1 stoichiometric ratio. Furthermore, the results showed the successful KT incorporation into the modified system and quantitatively released through a semi-permeable membrane in a sustained fashion (over 24 h). Finally, the in vivo results of the medicated constructs showed a significant inhibition of the induced inflammation and swelling, indicating that the modified construct has a great utility for safe non-irritating topical delivery applications.
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Kruk T, Bzowska M, Hinz A, Szuwarzyński M, Szczepanowicz K. Control of Specific/Nonspecific Protein Adsorption: Functionalization of Polyelectrolyte Multilayer Films as a Potential Coating for Biosensors. Materials (Basel) 2021; 14:7629. [PMID: 34947226 PMCID: PMC8706203 DOI: 10.3390/ma14247629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/28/2021] [Accepted: 12/07/2021] [Indexed: 01/23/2023]
Abstract
Control of nonspecific/specific protein adsorption is the main goal in the design of novel biomaterials, implants, drug delivery systems, and sensors. The specific functionalization of biomaterials can be achieved by proper surface modification. One of the important strategies is covering the materials with functional coatings. Therefore, our work aimed to functionalize multilayer coating to control nonspecific/specific protein adsorption. The polyelectrolyte coating was formed using a layer-by-layer technique (LbL) with biocompatible polyelectrolytes poly-L-lysine hydrobromide (PLL) and poly-L-glutamic acid (PGA). Nonspecific protein adsorption was minimized/eliminated by pegylation of multilayer films, which was achieved by adsorption of pegylated polycations (PLL-g-PEG). The influence of poly (ethylene glycol) chain length on eliminating nonspecific protein adsorption was confirmed. Moreover, to achieve specific protein adsorption, the multilayer film was also functionalized by immobilization of antibodies via a streptavidin bridge. The functional coatings were tested, and the adsorption of the following proteins confirmed the ability to control nonspecific/specific adsorption: human serum albumin (HSA), fibrinogen (FIB), fetal bovine serum (FBS), carcinoembryonic antigen human (CEA) monitored by quartz crystal microbalance with dissipation (QCM-D). AFM imaging of unmodified and modified multilayer surfaces was also performed. Functional multilayer films are believed to have the potential as a novel platform for biotechnological applications, such as biosensors and nanocarriers for drug delivery systems.
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Affiliation(s)
- Tomasz Kruk
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland
| | - Monika Bzowska
- Department of Cell Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, PL-30348 Krakow, Poland; (M.B.); (A.H.)
| | - Alicja Hinz
- Department of Cell Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, PL-30348 Krakow, Poland; (M.B.); (A.H.)
| | - Michał Szuwarzyński
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Mickiewicza 30, PL-30059 Krakow, Poland;
| | - Krzysztof Szczepanowicz
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland
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Stenström P, Fan Y, Zhang Y, Hutchinson D, García-Gallego S, Malkoch M. UV-Cured Antibacterial Hydrogels Based on PEG and Monodisperse Heterofunctional Bis-MPA Dendrimers. Molecules 2021; 26:2364. [PMID: 33921687 DOI: 10.3390/molecules26082364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/16/2021] [Accepted: 04/16/2021] [Indexed: 11/16/2022] Open
Abstract
Bacterial infections are one of the major threats to human health due to the raising crisis of antibiotic resistance. Herein, second generation antibacterial heterofunctional dendrimers based on 2,2-bis(methylol)propionic acid were synthesized. The dendrimers possessed six alkenes and 12 ammonium end-groups per molecule and were used to fabricate antibacterial hydrogels together with dithiol-functional polyethylene glycol (mol wt of 2, 6 and 10 kDa) as crosslinkers via thiol-ene chemistry. The network formation can be completed within 10 s upon UV-irradiation as determined by the stabilization of the storage modulus in a rheometer. The hydrogels swelled in aqueous media and could be functionalized with the N-hydroxysuccinimide ester of the dye disperse red 13, which allowed for visually studying the degradation of the hydrogels through the hydrolysis of the ester bonds of the dendritic component. The maximum swelling ratio of the gels was recorded within 4-8 h and the swelling ratios increased with higher molecular weight of the polyethylene glycol crosslinker. The gel formed with 10 kDa polyethylene glycol crosslinker showed the highest swelling ratio of 40 and good mechanical properties, with a storage modulus of 8 kPa. In addition, the hydrogels exhibited good biocompatibility towards both human fibroblasts and mouse monocytes, while showing strong antibacterial activity against both gram-positive and gram-negative bacteria.
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Marasini N, Fu C, Fletcher NL, Subasic C, Er G, Mardon K, Thurecht KJ, Whittaker AK, Kaminskas LM. The Impact of Polymer Size and Cleavability on the Intravenous Pharmacokinetics of PEG-Based Hyperbranched Polymers in Rats. Nanomaterials (Basel) 2020; 10:E2452. [PMID: 33302413 PMCID: PMC7762536 DOI: 10.3390/nano10122452] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 11/17/2022]
Abstract
A better understanding of the impact of molecular size and linkers is important for PEG-based hyperbranched polymers (HBPs) intended as tailored drug delivery vehicles. This study aimed to evaluate the effects of crosslinker chemistry (cleavable disulphide versus non-cleavable ethylene glycol methacrylate (EGDMA) linkers) and molecular weight within the expected size range for efficient renal elimination (22 vs. 48 kDa) on the intravenous pharmacokinetic and biodistribution properties of 89Zr-labelled HBPs in rats. All HBPs showed similar plasma pharmacokinetics over 72 h, despite differences in linker chemistry and size. A larger proportion of HBP with the cleavable linker was eliminated via the urine and faeces compared to a similar-sized HBP with the non-cleavable linker, while size had no impact on the proportion of the dose excreted. The higher molecular weight HBPs accumulated in organs of the mononuclear phagocyte system (liver and spleen) more avidly than the smaller HBP. These results suggest that HBPs within the 22 to 48 kDa size range show no differences in plasma pharmacokinetics, but distinct patterns of organ biodistribution and elimination are evident.
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Affiliation(s)
- Nirmal Marasini
- School of Biomedical Sciences, The University of Queensland, St Lucia 4072, Queensland, Australia;
| | - Changkui Fu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia 4072, Queensland, Australia; (C.F.); (N.L.F.); (G.E.); (K.J.T.); (A.K.W.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia 4072, Queensland, Australia
| | - Nicholas L. Fletcher
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia 4072, Queensland, Australia; (C.F.); (N.L.F.); (G.E.); (K.J.T.); (A.K.W.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia 4072, Queensland, Australia
- ARC Training Centre for innovation in Biomedical Imaging Technology, The University of Queensland, St Lucia 4072, Queensland, Australia
- Centre for Advance Imaging, The University of Queensland, St Lucia 4072, Queensland, Australia;
| | - Christopher Subasic
- School of Biomedical Sciences, The University of Queensland, St Lucia 4072, Queensland, Australia;
| | - Gerald Er
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia 4072, Queensland, Australia; (C.F.); (N.L.F.); (G.E.); (K.J.T.); (A.K.W.)
| | - Karine Mardon
- Centre for Advance Imaging, The University of Queensland, St Lucia 4072, Queensland, Australia;
| | - Kristofer J. Thurecht
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia 4072, Queensland, Australia; (C.F.); (N.L.F.); (G.E.); (K.J.T.); (A.K.W.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia 4072, Queensland, Australia
- ARC Training Centre for innovation in Biomedical Imaging Technology, The University of Queensland, St Lucia 4072, Queensland, Australia
- Centre for Advance Imaging, The University of Queensland, St Lucia 4072, Queensland, Australia;
| | - Andrew K. Whittaker
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia 4072, Queensland, Australia; (C.F.); (N.L.F.); (G.E.); (K.J.T.); (A.K.W.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia 4072, Queensland, Australia
| | - Lisa M. Kaminskas
- School of Biomedical Sciences, The University of Queensland, St Lucia 4072, Queensland, Australia;
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Herceg V, Bouilloux J, Janikowska K, Allémann E, Lange N. Cathepsin B-Cleavable Cyclopeptidic Chemotherapeutic Prodrugs. Molecules 2020; 25:molecules25184285. [PMID: 32962018 PMCID: PMC7570921 DOI: 10.3390/molecules25184285] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 09/14/2020] [Accepted: 09/15/2020] [Indexed: 11/23/2022] Open
Abstract
Cyclopeptidic chemotherapeutic prodrugs (cPCPs) are macromolecular protease-sensitive doxorubicin (DOX) prodrugs synthesized from a cyclodecapeptidic scaffold, termed Regioselectively Addressable Functionalized Template (RAFT). In order to increase the chemotherapeutic potential of DOX and limit its toxicity, we used a Cathepsin B (Cat B)-sensitive prodrug concept for its targeted release since this enzyme is frequently overexpressed in cancer cells. Copper-free “click” chemistry was used to synthesize cPCPs containing up to four DOX moieties tethered to the upper face of the scaffold through a Cat B-cleavable peptidic linker (GAGRRAAG). On the lower part, PEG 5, 10 and 20 kDa and a fifth peptidyl DOX moiety were grafted in order to improve the solubility, bioavailability and pharmacokinetic profiles of the compound. In vitro results on HT1080 human fibrosarcoma cells showed that cPCPs display a delayed action that consists of a cell cycle arrest in the G2 phase comparable to DOX alone, and increased cell membrane permeability.
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Ahmad AF, Aziz SA, Obaiys SJ, Zaid MHM, Matori KA, Samikannu K, Aliyu US. Biodegradable Poly (lactic acid)/ Poly (ethylene glycol) Reinforced Multi-Walled Carbon Nanotube Nanocomposite Fabrication, Characterization, Properties, and Applications. Polymers (Basel) 2020; 12:polym12020427. [PMID: 32059368 PMCID: PMC7077650 DOI: 10.3390/polym12020427] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 11/17/2019] [Accepted: 12/01/2019] [Indexed: 11/16/2022] Open
Abstract
This paper presents the electromagnetic interference properties of multi-walled carbon nanotubes (MWCNTs) as a novel nano-reinforcement filler in poly (lactic acid) (PLA)/poly (ethylene glycol) (PEG) polymer matrix that was prepared via melt blending mode. Plasticization of PLA was first carried out by PEG, which overcomes its brittleness problem, in order to enhance its flexibility. A waveguide adapter technique was used to measure the dielectric properties εr, and S-parameters reflection (S11) and transmission (S21) coefficients. The dielectric properties, microwave attenuation performances, and electromagnetic interference shielding effectiveness (EMISE) for all the material under test have been calculated over the full X-Band (8–12 GHz) due to its importance for military and commercial applications. The prepared samples were studied while using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transforms infrared spectroscopy (FTIR), mechanical properties measurements, as well as thermogravimetric analysis (TGA). The results showed that the dielectric properties increased with increased multi-walled carbon nanotubes (MWCNTs) filler, as well as the shielding effectiveness of the MWCNT/PLA/PEG nanocomposites increased with the increasing of MWCNTs. The highest SE total value was found to be 42.07 dB at 12 GHz for 4 wt.% filler content. It is also observed that the attenuation values of the nanocomposites increased with an increase in MWCNTs loading, as well as the power loss values for all of the samples increased with the increase in MWCNTs loading, except the amount of the transmitted wave through the nanocomposites.
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Affiliation(s)
- Ahmad Fahad Ahmad
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (M.H.M.Z.); (K.A.M.)
- Correspondence: (A.F.A.); (S.A.A.); Tel.: +60-173-370-907 (A.F.A.); +60-122-843-370 (S.A.A.)
| | - Sidek Ab Aziz
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (M.H.M.Z.); (K.A.M.)
- Correspondence: (A.F.A.); (S.A.A.); Tel.: +60-173-370-907 (A.F.A.); +60-122-843-370 (S.A.A.)
| | - Suzan Jabbar Obaiys
- School of Mathematical & Computer Sciences, Heriot-Watt University Malaysia, Putrajaya 62200, Malaysia;
| | - Mohd Hafiz Mohd Zaid
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (M.H.M.Z.); (K.A.M.)
| | - Khamirul Amin Matori
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (M.H.M.Z.); (K.A.M.)
| | - Kanagesan Samikannu
- Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia;
| | - Umar Sa’as Aliyu
- Department of Physics, Faculty of Science, Federal University Lafia, Nasarawa State, 0146 Lafia, Nigeria;
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Nagi JS, Skorenko K, Bernier W, Jones WE, Doiron AL. Near Infrared-Activated Dye-Linked ZnO Nanoparticles Release Reactive Oxygen Species for Potential Use in Photodynamic Therapy. Materials (Basel) 2019; 13:E17. [PMID: 31861462 PMCID: PMC6982235 DOI: 10.3390/ma13010017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/26/2019] [Accepted: 12/12/2019] [Indexed: 12/16/2022]
Abstract
Novel dye-linked zinc oxide nanoparticles (NPs) hold potential as photosensitizers for biomedical applications due to their excellent thermal- and photo-stability. The particles produced reactive oxygen species (ROS) upon irradiation with 850 nm near infrared (NIR) light in a concentration- and time-dependent manner. Upon irradiation, ROS detected in vitro in human umbilical vein endothelial cells (HUVEC) and human carcinoma MCF7 cells positively correlated with particle concentration and interestingly, ROS detected in MCF7 was higher than in HUVEC. Preferential cytotoxicity was also exhibited by the NPs as cell killing was higher in MCF7 than in HUVEC. In the absence of irradiation, dye-linked ZnO particles minimally affected the viability of cell (HUVEC) at low concentrations (<30 μg/mL), but viability significantly decreased at higher particle concentrations, suggesting a need for particle surface modification with poly (ethylene glycol) (PEG) for improved biocompatibility. The presence of PEG on particles after dialysis was indicated by an increase in size, an increase in zeta potential towards neutral, and spectroscopy results. Cell viability was improved in the absence of irradiation when cells were exposed to PEG-coated, dye-linked ZnO particles compared to non-surface modified particles. The present study shows that there is potential for biological application of dye-linked ZnO particles in photodynamic therapy.
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Affiliation(s)
- Jaspreet Singh Nagi
- Department of Electrical and Biomedical Engineering, University of Vermont, Burlington, VT 05405, USA;
| | | | - William Bernier
- ChromaNanoTech LLC, Binghamton, NY 13902, USA; (K.S.); (W.B.)
- Department of Chemistry, Binghamton University (SUNY), Binghamton, NY 13902, USA;
| | - Wayne E. Jones
- Department of Chemistry, Binghamton University (SUNY), Binghamton, NY 13902, USA;
- Provost and Vice President for Academic Affairs, University of New Hampshire, Durham, NH 03824, USA
| | - Amber L. Doiron
- Department of Electrical and Biomedical Engineering, University of Vermont, Burlington, VT 05405, USA;
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Zhang HC, Kang BH, Sheng X, Lu X. Novel Bio-Based Pomelo Peel Flour/Polyethylene Glycol Composite Phase Change Material for Thermal Energy Storage. Polymers (Basel) 2019; 11:E2043. [PMID: 31835415 DOI: 10.3390/polym11122043] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 11/25/2019] [Accepted: 11/28/2019] [Indexed: 11/16/2022] Open
Abstract
Abstract: A series of novel bio-based form stable composite phase-change materials (fs-CPCMs) for solar thermal energy storage and management applications were prepared, using the pomelo peel flour (PPF) as the supporting matrix and poly (ethylene glycol) (PEG) or isocyanate-terminated PEG to induce a phase change. The microscopic structure, crystalline structures and morphologies, phase change properties, thermal stability, light-to-thermal conversion behavior, and thermal management characteristics of the obtained fs-CPCMs were studied. The results indicate that the obtained fs-CPCM-2 presented remarkable phase-change performance and high thermal stability. The melting latent heat and crystallization heat for fs-CPCM-2 are 143.2 J/g and 141.8 J/g, respectively, and its relative enthalpy efficiency (λ) is 87.4%, which are higher than most reported values in the related literature. The obtained novel bio-based fs-CPCM-2 demonstrated good potential for applications in solar thermal energy storage and waste heat recovery.
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12
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Xie M, Wang Z, Wan X, Weng J, Tu M, Mei J, Wang Z, Du X, Wang L, Chen C. Crosslinking effects of branched PEG on decellularized lungs of rats for tissue engineering. J Biomater Appl 2019; 34:965-974. [PMID: 31690161 DOI: 10.1177/0885328219885068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Mengying Xie
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Zhiyi Wang
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xinlong Wan
- School of basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Jie Weng
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Mengyun Tu
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jin Mei
- School of basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Zhibin Wang
- School of basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xiaohong Du
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Liangxing Wang
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Chan Chen
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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13
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Feng R, Zhu W, Chu W, Teng F, Meng N, Deng P, Song Z. Y-shaped Folic Acid-Conjugated PEG-PCL Copolymeric Micelles for Delivery of Curcumin. Anticancer Agents Med Chem 2017; 17:599-607. [PMID: 27528180 DOI: 10.2174/1871520616666160815124014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 06/12/2016] [Accepted: 08/09/2016] [Indexed: 11/22/2022]
Abstract
BACKGROUND Curcumin is a natural hydrophobic product showing anticancer activity. Many studies show its potential use in the field of cancer treatment due to its safety and efficiency. However, its application is limited due to its low water-solubility and poor selective delivery to cancer. OBJECTIVE A Y-shaped folic acid-modified poly (ethylene glycol)-b-poly (ε-caprolactone)2 copolymer was prepared to improve curcumin solubility and realize its selective delivery to cancer. METHOD AND RESULTS The copolymer was synthesized through selective acylation reaction of folic acid with α- monoamino poly(ethylene glycol)-b-poly(ε-caprolactone)2. Curcumin was encapsulated into the copolymeric micelles with 93.71% of encapsulation efficiency and 11.94 % of loading capacity. The results from confocal microscopy and cellular uptake tests showed that folic acid-modified copolymeric micelles could improve cellular uptake of curcumin in Hela and HepG2 cells compared with folic acid-unmodified micelles. In vitro cytotoxicity assay showed that folic acid-modified micelles improved anticancer activity against Hela and HepG2 cells in comparison to folic acidunmodified micelles. Meanwhile, both drug-loaded micelles demonstrated higher activity against Hela cell lines than HepG2. CONCLUSION The research results suggested that the folic acid-modified Y-shaped copolymeric micelles should be used to enhance hydrophobic anticancer drugs' solubility and their specific delivery to folic acid receptors-overexpressed cancer.
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Affiliation(s)
- Runliang Feng
- School of Biological Science and Technology, University of Jinan, No. 336 West Road of Nanxinzhuang, Jinan 250022, Shandong Province, China
| | - Wenxia Zhu
- School of Biological Science and Technology, University of Jinan, No. 336 West Road of Nanxinzhuang, Jinan 250022, Shandong Province, China
| | - Wei Chu
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, No.15 Datun Road, Chaoyang District, Beijing 100101, China
| | - Fangfang Teng
- School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, No.l6866 East Road of Jingshi, Jinan 250200, Shandong Province, China
| | - Ning Meng
- School of Biological Science and Technology, University of Jinan, No. 336 West Road of Nanxinzhuang, Jinan 250022, Shandong Province, China
| | - Peizong Deng
- School of Biological Science and Technology, University of Jinan, No. 336 West Road of Nanxinzhuang, Jinan 250022, Shandong Province, China
| | - Zhimei Song
- Department of Pharmaceutical Engineering, School of Biological Science and Technology, University of Jinan, No. 336 West Road of Nanxinzhuang, Jinan 250022, Shandong Province, China
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14
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Abdallah O, Jalali F, Zamani S, Isamil HM, Ma S, Nasrallah GK, Younes HM. Fabrication & Characterization of 3D Electrospun Biodegradable Nanofibers for Wound Dressing, Drug Delivery and Other Tissue Engineering Applications. Pharm Nanotechnol 2016; 4:191-201. [PMID: 29052498 DOI: 10.2174/2211738504666160720125322] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Revised: 06/22/2016] [Accepted: 07/11/2016] [Indexed: 11/22/2022]
Abstract
BACKGROUND The use of electrospinning technology (ET) in fabrication of threedimensional biodegradable electrospun nanofibers scaffolds (BENS) has recently gained considerable attention in tissue engineering. BENS are superior to other existing scaffolds in tissue regeneration as they provide high surface area-to-volume ratio, possess high porosity, and offer a biomimetic environment in a nanometer scale. OBJECTIVES To fabricate & characterize BENS using Poly (ethylene glycol) (PEG35000) as a biodegradable polymer loaded with Amoxicillin Trihydrate (AMX) for use as a wound dressing. METHOD Solutions of PEG35000 in chloroform of varying concentrations were used to fabricate BENS using ET. Blank & 1% w/v AMX-loaded BENS were fabricated & characterized. Morphology of BENS were assessed using Scanning Electron Microscopy (SEM). Fourier Transform Infrared (FT-IR) Spectroscopy was used to identify the interaction between PEG35000 and AMX. Differential Scanning Calorimetry (DSC) was used to assess the crystallinity and thermal behavior of the prepared BENS. The X-Ray Diffraction (XRD) analysis for the blank and drug loaded electrospun fibers was carried out to identify the changes in their crystalline pattern. The in vitro antibacterial activity against common skin Gram-negative and Gram-positive pathogens was also tested. RESULTS Blank & AMX loaded 35% w/v PEG35000 solutions produced the most homogenous and intact nanofibers. Major bands of AMX in FTIR were clearly observed in the spectrum of AMX with PEG35000 post electrospinning. Moreover, DSC thermograms indicated that AMX existed in its amorphous dispersed state within PEG fibers supported by the disappearance of its melting peak at 190°C and confirmed by the complete absence of AMX crystals under SEM. Finally, the results of DSC were confirmed by XRD patterns. Characterizing XRD peaks of AMX loaded with PEG3500 post electrospinning disappeared as an indication of the complete dispersion of AMX in the loaded fibers and its complete conversion to the amorphous form. The in vitro antibacterial assay confirmed the efficiency of the drug loaded fibers against the common skin pathogens. CONCLUSION BENS using PEG35000 loaded with AMX were successfully fabricated and characterized. Our findings show that PEG BENS has features that make it a promising candidate for wound healing applications.
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Affiliation(s)
| | | | | | | | | | | | - Husam M Younes
- Pharmaceutics & Polymeric Drug Delivery Research Laboratory (PPDDRL), College of Pharmacy. P.O. Box: 2713, Doha, Qatar
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15
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Abstract
This review focuses on the concept of immunoisolation and how this method has evolved over the last few decades. The concept of immunoisolation came out of the need to protect allogeneic transplant tissue from the host immune system and avoid systemic side effects of immunosuppression. The latter remains a significant hurdle in clinical translation of using tissue transplants for restoring endocrine function in diabetes, growth hormone deficiency, and other conditions. Herein, we review the most significant works studying the use of hydrogels, specifically alginate and poly (ethylene glycol), and membranes for immunoisolation and discuss how this approach can be applied in reproductive biology.
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Affiliation(s)
- Anu David
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - James Day
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Ariella Shikanov
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
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16
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Simón-Yarza T, Tamayo E, Benavides C, Lana H, Formiga FR, Grama CN, Ortiz-de-Solorzano C, Kumar MN, Prosper F, Blanco-Prieto MJ. Functional benefits of PLGA particulates carrying VEGF and CoQ10 in an animal of myocardial ischemia. Int J Pharm 2013; 454:784-90. [PMID: 23639291 DOI: 10.1016/j.ijpharm.2013.04.015] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 04/05/2013] [Accepted: 04/08/2013] [Indexed: 02/05/2023]
Abstract
Myocardial ischemia (MI) remains one of the leading causes of death worldwide. Angiogenic therapy with the vascular endothelial growth factor (VEGF) is a promising strategy to overcome hypoxia and its consequences. However, from the clinical data it is clear that fulfillment of the potential of VEGF warrants a better delivery strategy. On the other hand, the compelling evidences of the role of oxidative stress in diseases like MI encourage the use of antioxidant agents. Coenzyme Q10 (CoQ10) due to its role in the electron transport chain in the mitochondria seems to be a good candidate to manage MI but is associated with poor biopharmaceutical properties seeking better delivery approaches. The female Sprague Dawley rats were induced MI and were followed up with VEGF microparticles intramyocardially and CoQ10 nanoparticles orally or their combination with appropriate controls. Cardiac function was assessed by measuring ejection fraction before and after three months of therapy. Results demonstrate significant improvement in the ejection fraction after three months with both treatment forms individually; however the combination therapy failed to offer any synergism. In conclusion, VEGF microparticles and CoQ10 nanoparticles can be considered as promising strategies for managing MI.
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17
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Malhotra M, Lane C, Tomaro-Duchesneau C, Saha S, Prakash S. A novel method for synthesizing PEGylated chitosan nanoparticles: strategy, preparation, and in vitro analysis. Int J Nanomedicine 2011; 6:485-94. [PMID: 21562608 PMCID: PMC3088072 DOI: 10.2147/ijn.s17190] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Indexed: 12/04/2022] Open
Abstract
Preparation of poly (ethylene glycol) (PEG)-grafted chitosan is essential for improving the biocompatibility and water solubility of chitosan. Presently available methods for this have limitations. This article describes a new method for preparing PEGylated chitosan nanoparticles. For this chitosan was chemoselectively modified using a novel scheme at the C6 position of its repeating units by PEG. The amine groups at the C2 position of the chitosan were protected using phthalic anhydride. Sodium hydride was used to catalyze the etherification reaction between chlorinated chitosan and methyl-PEG, and PEG-grafted chitosan was successfully synthesized. Each step was characterized using 13C nuclear magnetic resonance and Fourier transform infrared. After PEGylation the phthaloylated chitosan was successfully deprotected using hydrazine monohydrate. The synthetic scheme proposed demonstrates a new method for grafting PEG onto chitosan with a moderate degree of substitution. The potential of this polymer in nanoparticle preparation using an ionic gelation method and its gene delivery potentials were investigated by complexing a fluorescently labeled control siRNA. The result showed that suitable nanoparticles can be synthesized using this polymer and that they have capacity to carry genes and provide adequate transfection efficacy with no toxicity when tested in neuronal cells.
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Affiliation(s)
- Meenakshi Malhotra
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering, Faculty of Medicine, McGill University, Quebec, Canada
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Ainslie KM, Kraning CM, Desai TA. Microfabrication of an asymmetric, multi-layered microdevice for controlled release of orally delivered therapeutics. Lab Chip 2008; 8:1042-7. [PMID: 18584077 PMCID: PMC2969854 DOI: 10.1039/b800604k] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The creation of an oral drug delivery platform to administer chemotherapeutic agents effectively can not only increase patient compliance, but also potentially diminish drug toxicity. A microfabricated device offers advantages over conventional drug delivery technology. Here we describe the development of a multi-layered polymeric drug-loaded microfabricated device (microdevice) for the oral delivery of therapeutics, which offers unidirectional release of multiple therapeutics. The imaging and release of therapeutics from the multi-layered device was performed with three different fluorescently labeled albumins. The release of insulin and chemotherapeutic camptothecin was also observed to be released in a controlled manner over the course of 180 min in vitro. Furthermore, asymmetric delivery was shown to concentrate drug at the device/cell interface, wherein 10 times more drug permeated an intestinal epithelial cell monolayer, compared to unprotected drug-loaded hydrogels. The bioactivity of the released chemotherapeutic was shown with cytostasis of colorectal adenocarcinoma cells. Cytostasis of drug loaded hydrogels was significantly higher than control empty hydrogel laden microdevices. Our results conclude that microfabrication of a hydrogel laden microdevice leads to a viable oral delivery platform for chemotherapeutics.
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Affiliation(s)
- Kristy M. Ainslie
- Department of Bioengineering and Therapeutic Sciences; Department of Physiology University of California, San Francisco; San Francisco, CA 64158-2330 (USA)
| | - Casey M. Kraning
- National Science Foundation Research Experience for Undergraduates; Summer Research Training Program; University of California, San Francisco; San Francisco, CA; 94158 (USA) Chemistry Department; Butler University; Indianapolis, IN; 46208 (USA)
| | - Tejal A. Desai
- Department of Bioengineering and Therapeutic Sciences; Department of Physiology University of California, San Francisco; San Francisco, CA 64158-2330 (USA)
- Corresponding Author: Tejal A. Desai, Department of Physiology University of California, San Francisco, San Francisco, CA 64158-2330, Box 2520, Byers Hall Rm 203C,
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