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da Silva AR, de Oliveira WF, da Silva PM, de Siqueira Patriota LL, de Vasconcelos Alves RR, de Oliveira APS, Dos Santos Correia MT, Paiva PMG, Vainstein MH, Filho PEC, Fontes A, Napoleão TH. Quantum dots conjugated to lectins from Schinus terebinthifolia leaves (SteLL) and Punica granatum sarcotesta (PgTeL) as potential fluorescent nanotools for investigating Cryptococcus neoformans. Int J Biol Macromol 2021; 192:232-240. [PMID: 34634324 DOI: 10.1016/j.ijbiomac.2021.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 09/24/2021] [Accepted: 10/01/2021] [Indexed: 02/08/2023]
Abstract
This study reports the development of conjugates based on quantum dots (QD)s and lectins from Schinus terebinthifolia leaves (SteLL) and Punica granatum sarcotesta (PgTeL). Cryptococcus neoformans cells were chosen to evaluate the efficiency of the conjugates. Lectins were conjugated to QDs via adsorption, and the optical parameters (emission and absorption) were monitored. Lectin stability in the conjugates towards denaturing agents was investigated via fluorometry. The conjugation was evaluated using fluorescence microplate (FMA) and hemagglutination (HA) assays. The labeling of the C. neoformans cell surface was quantified using flow cytometry and observed via fluorescence microscopy. The QDs-SteLL and QDs-PgTeL conjugates, obtained at pH 7.0 and 8.0, respectively, showed the maintenance of colloidal and optical properties. FMA confirmed the conjugation, and the HA assay indicated that the lectin carbohydrate-binding ability was preserved after conjugation. SteLL and PgTeL showed stability towards high urea concentrations and heating. Conjugates labeled over 90% of C. neoformans cells as observed via flow cytometry and confirmed through fluorescence microscopy. C. neoformans labeling by conjugates was inhibited by glycoproteins, suggesting specific interactions through the lectin carbohydrate-binding site. Thus, an effective protocol for the conjugation of SteLL or PgTeL with QDs was proposed, yielding new nanoprobes useful for glycobiological studies.
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Affiliation(s)
- Abdênego Rodrigues da Silva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil; Departamento de Biofísica e Radiobiologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Weslley Felix de Oliveira
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil; Departamento de Biofísica e Radiobiologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | | | | | | | | | | | | | - Marilene Henning Vainstein
- Departamento de Biologia Molecular e Biotecnologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Paulo Euzébio Cabral Filho
- Departamento de Biofísica e Radiobiologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Adriana Fontes
- Departamento de Biofísica e Radiobiologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Thiago Henrique Napoleão
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil.
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2
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Metwally S, Stachewicz U. Surface potential and charges impact on cell responses on biomaterials interfaces for medical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 104:109883. [DOI: 10.1016/j.msec.2019.109883] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 05/02/2019] [Accepted: 06/11/2019] [Indexed: 12/12/2022]
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3
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Cui K, Yan B, Xie Y, Qian H, Wang X, Huang Q, He Y, Jin S, Zeng H. Regenerable urchin-like Fe 3O 4@PDA-Ag hollow microspheres as catalyst and adsorbent for enhanced removal of organic dyes. JOURNAL OF HAZARDOUS MATERIALS 2018; 350:66-75. [PMID: 29453121 DOI: 10.1016/j.jhazmat.2018.02.011] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 01/20/2018] [Accepted: 02/04/2018] [Indexed: 05/16/2023]
Abstract
In this work, novel urchin-like Fe3O4@polydopamine (PDA)-Ag hollow microspheres have been prepared via a facile synthesis method by in situ reduction and growth of Ag nanoparticles on mussel-inspired PDA layers coated on Fe3O4 hollow cores. The catalytic reduction efficiency and adsorption performance of the as-prepared urchin-like Fe3O4@polydopamine (PDA)-Ag hollow microspheres for model organic dyes (i.e., methylene blue and rhodamine B) under varying pH condition have been systematically investigated, which are demonstrated to be significantly enhanced as compared to that of spherical (relatively smooth) solid Fe3O4@PDA-Ag microspheres. The as-prepared urchin-like Fe3O4@PDA-Ag hollow microspheres show high reusability, easy separability, and fast regeneration ability, with no obvious drop in the catalytic and adsorption efficiency after cyclic reuse. The versatile PDA coatings on the urchin-like microspheres allow further surface functionalization for development of multifunctional catalyst and adsorbent materials. This work provides a very useful and facile methodology for synthesizing and tuning the urchin-like morphology of Fe3O4@PDA-Ag microspheres, with great potential applications in catalysis and wastewater treatment.
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Affiliation(s)
- Kuixin Cui
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada; Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
| | - Bin Yan
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada; College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu, 610065, China
| | - Yijun Xie
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Hui Qian
- National Institute for Nanotechnology, National Research Council, Edmonton, Alberta, T6G 2M9, Canada
| | - Xiaogang Wang
- Schoolof Material Science & Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Qingxue Huang
- Schoolof Material Science & Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Yuehui He
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
| | - Shengming Jin
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada.
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4
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Shen C, Li J, Zhang Y, Li Y, Shen G, Zhu J, Tao J. Polyethylenimine-based micro/nanoparticles as vaccine adjuvants. Int J Nanomedicine 2017; 12:5443-5460. [PMID: 28814862 PMCID: PMC5546778 DOI: 10.2147/ijn.s137980] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Vaccines have shown great success in treating and preventing tumors and infections, while adjuvants are always demanded to ensure potent immune responses. Polyethylenimine (PEI), as one of the well-studied cationic polymers, has been used as a transfection reagent for decades. However, increasing evidence has shown that PEI-based particles are also capable of acting as adjuvants. In this paper, we briefly review the physicochemical properties and the broad applications of PEI in different fields, and elaborate on the intracellular processes of PEI-based vaccines. In addition, we sum up the proof of their in vivo and clinical applications. We also highlight some mechanisms proposed for the intrinsic immunoactivation function of PEI, followed by the challenges and future perspectives of the applications of PEI in the vaccines, as well as some strategies to elicit the desirable immune responses.
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Affiliation(s)
- Chen Shen
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jun Li
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Zhang
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuce Li
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Guanxin Shen
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jintao Zhu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Juan Tao
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Mahanta AK, Senapati S, Maiti P. Retracted Article: A polyurethane–chitosan brush as an injectable hydrogel for controlled drug delivery and tissue engineering. Polym Chem 2017. [DOI: 10.1039/c7py01218g] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Hydrogels and porous lyophilized hydrogels have been designed using a polyurethane brush with a chitosan backbone through grafting for controlled drug delivery.
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Affiliation(s)
- Arun Kumar Mahanta
- School of Materials Science and Technology
- Indian Institute of Technology (Banaras Hindu University)
- Varanasi 221 005
- India
| | - Sudipta Senapati
- School of Materials Science and Technology
- Indian Institute of Technology (Banaras Hindu University)
- Varanasi 221 005
- India
| | - Pralay Maiti
- School of Materials Science and Technology
- Indian Institute of Technology (Banaras Hindu University)
- Varanasi 221 005
- India
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6
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Chitin and chitosan based polyurethanes: A review of recent advances and prospective biomedical applications. Int J Biol Macromol 2016; 86:630-45. [DOI: 10.1016/j.ijbiomac.2016.02.004] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Revised: 01/28/2016] [Accepted: 02/01/2016] [Indexed: 01/30/2023]
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7
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Greene GW, Duffy E, Shallan A, Wuethrich A, Paull B. Electrokinetic Properties of Lubricin Antiadhesive Coatings in Microfluidic Systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1899-1908. [PMID: 26814794 DOI: 10.1021/acs.langmuir.5b03535] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Lubricin is a glycoprotein found in articular joints which has long been recognized as being an important biological boundary lubricant molecule and, more recently, an impressive antiadhesive that readily self-assembles into a well ordered, polymer brush layer on virtually any substrate. The lubricin molecule possesses an overabundance of anionic charge, a property that is atypical among antiadhesive molecules, that enables its use as a coating for applications involving electrokinetic processes such as electrophoresis and electroosmosis. Coating the surfaces of silica and polymeric microfluidic devices with self-assembled lubricin coatings affords a unique combination of excellent fouling resistance and high charge density that enables notoriously "sticky" biomolecules such as proteins to be used and controlled electrokinetically in the device without complications arising from nonspecific adsorption. Using capillary electrophoresis, we characterized the stability, uniformity, and electrokinetic properties of lubricin coatings applied to silica and PTFE capillaries over a range of run buffer pHs and when exposed to concentrated solutions of protein. In addition, we demonstrate the effectiveness of lubricin as a coating to minimize nonspecific protein adsorption in an electrokinetically controlled polydimethylsiloxane/silica microfluidic device.
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Affiliation(s)
- George W Greene
- Institute for Frontier Materials and ARC Centre of Excellence for Electromaterials Science, Deakin University , Geelong, VIC Australia
| | - Emer Duffy
- Australian Centre for Research on Separation Science, and ARC Centre of Excellence for Electromaterials Science, School of Physical Sciences, University of Tasmania , Hobart, Australia
| | - Aliaa Shallan
- Australian Centre for Research on Separation Science, and ARC Centre of Excellence for Electromaterials Science, School of Physical Sciences, University of Tasmania , Hobart, Australia
| | - Alain Wuethrich
- Australian Centre for Research on Separation Science, and ARC Centre of Excellence for Electromaterials Science, School of Physical Sciences, University of Tasmania , Hobart, Australia
| | - Brett Paull
- Australian Centre for Research on Separation Science, and ARC Centre of Excellence for Electromaterials Science, School of Physical Sciences, University of Tasmania , Hobart, Australia
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8
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Greene GW, Martin LL, Tabor RF, Michalczyk A, Ackland LM, Horn R. Lubricin: A versatile, biological anti-adhesive with properties comparable to polyethylene glycol. Biomaterials 2015; 53:127-36. [DOI: 10.1016/j.biomaterials.2015.02.086] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 02/13/2015] [Accepted: 02/19/2015] [Indexed: 12/31/2022]
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9
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Zia KM, Anjum S, Zuber M, Mujahid M, Jamil T. Synthesis and molecular characterization of chitosan based polyurethane elastomers using aromatic diisocyanate. Int J Biol Macromol 2014; 66:26-32. [DOI: 10.1016/j.ijbiomac.2014.01.073] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 01/24/2014] [Accepted: 01/28/2014] [Indexed: 11/29/2022]
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10
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Preparation and characterization of keratin-based biocomposite hydrogels prepared by electron beam irradiation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:5051-7. [PMID: 24094223 DOI: 10.1016/j.msec.2013.08.032] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 08/10/2013] [Accepted: 08/27/2013] [Indexed: 12/28/2022]
Abstract
The biocompatible and highly porous keratin-based hydrogels were prepared using electron beam irradiation (EBI). The conditions for keratin-based hydrogel formation were investigated depending on several conditions, including the presence of poly(vinyl alcohol) (PVA), concentration of keratin solution, EBI dose, and poly(ethylene imine) (PEI) additives. The pure keratin (human hair and wool) aqueous solution was not gelled by EBI, while the aqueous keratin solutions blended with PVA were gelled at an EBI dose of more than 90 kGy. Furthermore, in the presence of PEI, the aqueous keratin solution blended with PVA could be gelled at a considerably lower EBI dose, even at 10 kGy. This finding suggests that the PEI additives significantly influence the rate of gelation and that PEIs function as an accelerator during gelation. The resulting keratin-based hydrogels were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), gel fraction, degree of swelling, gel strength, and kinetics of swelling analyses.
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11
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Kondyurin AV, Naseri P, Tilley JMR, Nosworthy NJ, Bilek MMM, McKenzie DR. Mechanisms for covalent immobilization of horseradish peroxidase on ion-beam-treated polyethylene. SCIENTIFICA 2012; 2012:126170. [PMID: 24278665 PMCID: PMC3820519 DOI: 10.6064/2012/126170] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Accepted: 11/20/2012] [Indexed: 05/26/2023]
Abstract
The surface of polyethylene was modified by plasma immersion ion implantation. Structure changes including carbonization and oxidation were observed. High surface energy of the modified polyethylene was attributed to the presence of free radicals on the surface. The surface energy decay with storage time after treatment was explained by a decay of the free radical concentration while the concentration of oxygen-containing groups increased with storage time. Horseradish peroxidase was covalently attached onto the modified surface by the reaction with free radicals. Appropriate blocking agents can block this reaction. All aminoacid residues can take part in the covalent attachment process, providing a universal mechanism of attachment for all proteins. The native conformation of attached protein is retained due to hydrophilic interactions in the interface region. The enzymatic activity of covalently attached protein remained high. The long-term activity of the modified layer to attach protein is explained by stabilisation of unpaired electrons in sp(2) carbon structures. A high concentration of free radicals can give multiple covalent bonds to the protein molecule and destroy the native conformation and with it the catalytic activity. The universal mechanism of protein attachment to free radicals could be extended to various methods of radiation damage of polymers.
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Affiliation(s)
- Alexey V. Kondyurin
- Applied and Plasma Physics, School of Physics, University of Sydney, A28, Sydney, NSW 2006, Australia
| | - Pourandokht Naseri
- Applied and Plasma Physics, School of Physics, University of Sydney, A28, Sydney, NSW 2006, Australia
| | - Jennifer M. R. Tilley
- Applied and Plasma Physics, School of Physics, University of Sydney, A28, Sydney, NSW 2006, Australia
| | - Neil J. Nosworthy
- Applied and Plasma Physics, School of Physics, University of Sydney, A28, Sydney, NSW 2006, Australia
| | - Marcela M. M. Bilek
- Applied and Plasma Physics, School of Physics, University of Sydney, A28, Sydney, NSW 2006, Australia
| | - David R. McKenzie
- Applied and Plasma Physics, School of Physics, University of Sydney, A28, Sydney, NSW 2006, Australia
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12
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Synthesis of polyvinylidene fluoride (PVDF) membranes for protein binding: Effect of casting thickness. J Appl Polym Sci 2012. [DOI: 10.1002/app.38522] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Wang F, Gu Z, Cui Z, Liu L. Comparison of covalent immobilization of amylase on polystyrene pellets with pentaethylenehexamine and pentaethylene glycol spacers. BIORESOURCE TECHNOLOGY 2011; 102:9374-9379. [PMID: 21868216 DOI: 10.1016/j.biortech.2011.07.110] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 07/25/2011] [Accepted: 07/29/2011] [Indexed: 05/31/2023]
Abstract
α-Amylase from Aspergillus oryzae was covalently immobilized onto polystyrene pellets with pentaethylenehexamine (PS-PEHA-Ald) and pentaethylene glycol (PS-PG-Ald) carrying a terminal aldehyde group. Optimum immobilization occured at pH 8.0 and 25 °C, and at pH 7.0 and 35 °C for PS-PEHA-Ald and PS-PG-Ald, respectively. PS-PEHA-Ald immobilized enzyme retained approximately 75% of the initial activity over 45 days of storage, 70% of the initial activity after nine runs of recycling and displayed the better resistance to detrimental metal ions. PS-PG-Ald immobilized enzyme retained approximately 50% of the initial activity in 8h at 70 °C. The catalytic efficiencies of PS-PEHA-Ald immobilized and PS-PG-Ald immobilized amylase were 1.42 and 1.29 times higher than that of native enzyme. The activation energy of the reaction mediated by the amylase was reduced by 58.1% and 57.3% when PS-PEHA-Ald and PS-PG-Ald used as support respectively.
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Affiliation(s)
- Feng Wang
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
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14
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Immobilization of bovine serum albumin onto porous polyethylene membranes using strongly attached polydopamine as a spacer. Colloids Surf B Biointerfaces 2011; 86:111-8. [DOI: 10.1016/j.colsurfb.2011.03.027] [Citation(s) in RCA: 172] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 02/12/2011] [Accepted: 03/21/2011] [Indexed: 11/17/2022]
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15
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Mathes J, Friess W. Influence of pH and ionic strength on IgG adsorption to vials. Eur J Pharm Biopharm 2011; 78:239-47. [DOI: 10.1016/j.ejpb.2011.03.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 03/03/2011] [Accepted: 03/14/2011] [Indexed: 11/26/2022]
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16
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Zheng Y, Gurgel PV, Carbonell RG. Effects of UV Exposure and Initiator Concentration on the Spatial Variation of Poly(glycidyl methacrylate) Grafts on Nonwoven Fabrics. Ind Eng Chem Res 2011. [DOI: 10.1021/ie1021333] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yong Zheng
- ProMetic BioSciences USA, Inc., 911 Partners Way, Raleigh, North Carolina 27695, United States
| | - Patrick V. Gurgel
- ProMetic BioSciences USA, Inc., 911 Partners Way, Raleigh, North Carolina 27695, United States
| | - Ruben G. Carbonell
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
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17
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Cheng Z, Wu C, Yang W, Xu T. Bromomethylated Poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO)-Based Amphoteric Hollow-Fiber Membranes: Preparation and Lysozyme Adsorption. Ind Eng Chem Res 2010. [DOI: 10.1021/ie100348e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhenfeng Cheng
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China, and School of Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Cuiming Wu
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China, and School of Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Weihua Yang
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China, and School of Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Tongwen Xu
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China, and School of Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
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18
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Yusilawati. Surface Modification of Polystyrene Beads by Ultraviolet/Ozone Treatment and its Effect on Gelatin Coating. ACTA ACUST UNITED AC 2010. [DOI: 10.3844/ajassp.2010.724.731] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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19
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Xie HG, Li XX, Lv GJ, Xie WY, Zhu J, Luxbacher T, Ma R, Ma XJ. Effect of surface wettability and charge on protein adsorption onto implantable alginate-chitosan-alginate microcapsule surfaces. J Biomed Mater Res A 2010; 92:1357-65. [PMID: 19353563 DOI: 10.1002/jbm.a.32437] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Alginate-chitosan-alginate (ACA) microcapsules have been developed as a device for the transplantation of living cells. However, protein adsorption onto the surface of microcapsules immediately upon their implantation decides their ultimate biocompatibility. In this work, the chemical composition of the ACA membranes was determined using X-ray photoelectron spectroscopy (XPS). The surface wettability and charge were determined by contact angle and zeta potential measurements, respectively. Then, the effects of surface wettability and charge on bovine fibrinogen (Fgn) and gamma globulin (IgG) adsorption onto ACA microcapsules were evaluated. The results showed that ACA microcapsules had a hydrophilic membrane. So, the surface wettability of ACA microcapsules had little effect on protein adsorption. There was a negative zeta potential of ACA microcapsules which varies with the viscosity or G content of alginate used, indicating a varying degree of net negatively charged groups on the surface of ACA microcapsules. The amount of adsorbed protein increased with increasing of positive charge. Furthermore, the interaction between proteins and ACA microcapsules is dominated by electrostatic repulsion at pH 7.4 and that is of electrostatic attraction at pH 6.0. This work could help to explain the bioincompatibility of ACA microcapsules and will play an important role in the optimization of the microcapsule design.
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Affiliation(s)
- Hong-Guo Xie
- Biotechnology Division, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People's Republic of China
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Zia KM, Zuber M, Bhatti IA, Barikani M, Sheikh MA. Evaluation of biocompatibility and mechanical behavior of chitin-based polyurethane elastomers. Part-II: Effect of diisocyanate structure. Int J Biol Macromol 2009; 44:23-8. [DOI: 10.1016/j.ijbiomac.2008.11.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2008] [Revised: 10/29/2008] [Accepted: 11/03/2008] [Indexed: 10/21/2022]
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21
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Abstract
The major challenges in formulation development for hydrophobic proteins are low solubility often combined with a strong tendency for adsorption. Human serum albumin (HSA) is frequently used as excipient to overcome these problems. Due to several drawbacks with HSA, new ways need to be found to circumvent the use of this excipient in protein formulations. One possible approach is to select an appropriate formulation pH and ionic strength in combination with excipients that provide sufficient stability and solubility for the hydrophobic protein. A reduction in adsorption can be achieved by adding surfactants or using special containers.
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Affiliation(s)
- Andrea Hawe
- Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-University of Munich, Munich, Germany.
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22
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Xu X, Lenhoff AM. A Predictive Approach to Correlating Protein Adsorption Isotherms on Ion-Exchange Media. J Phys Chem B 2008; 112:1028-40. [DOI: 10.1021/jp0754233] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xuankuo Xu
- Center for Molecular and Engineering Thermodynamics, Department of Chemical Engineering, University of Delaware, Newark, Delaware 19716
| | - Abraham M. Lenhoff
- Center for Molecular and Engineering Thermodynamics, Department of Chemical Engineering, University of Delaware, Newark, Delaware 19716
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