1
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Kartashova AD, Gonchar KA, Chermoshentsev DA, Alekseeva EA, Gongalsky MB, Bozhev IV, Eliseev AA, Dyakov SA, Samsonova JV, Osminkina LA. Surface-Enhanced Raman Scattering-Active Gold-Decorated Silicon Nanowire Substrates for Label-Free Detection of Bilirubin. ACS Biomater Sci Eng 2021; 8:4175-4184. [PMID: 34775760 DOI: 10.1021/acsbiomaterials.1c00728] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Bilirubin (BR) is a product of hemoglobin breakdown, and its increasing levels in the blood may indicate liver disorders and lead to jaundice. Kernicterus is most dangerous in newborns when the unconjugated BR concentration can quickly rise to toxic levels, causing neurological damage and even death. The development of an accurate, fast, and sensitive sensor for BR detection will help reduce diagnostic time and ensure successful treatment. In this study, we propose a new method for creating a surface-enhanced Raman scattering (SERS)-active substrate based on gold-decorated silicon nanowires (Au@SiNWs) for sensitive label-free BR detection. Gold-assisted chemical etching of crystalline silicon wafers was used to synthesize SiNWs, the tops of which were then additionally decorated with gold nanoparticles. The low detection limit of model analyte 4-mercaptopyridine down to the concentration of 10-8 M demonstrated the excellent sensitivity of the obtained substrates for SERS application. The theoretical full-wave electromagnetic simulations of Raman scattering in the Au@SiNW substrates showed that the major contribution to the total SERS signal comes from the analyte molecules located on the SiNW surface near the gold nanoparticles. Therefore, for efficient BR adsorption and SERS detection, the surface of the SiNWs was modified with amino groups. Label-free detection of BR using amino modified Au@SiNWs with high point-to-point, scan-to-scan, and batch-to-batch reproducibility with a detection limit of 10-6 M has been demonstrated. Artificial urine, mimicking human urine samples, was used as the matrix to get insights into the influence of different parameters such as matrix complexity on the overall BR SERS signal. The signal stability was demonstrated for 7 days after adsorption of BR with a concentration of 5 × 10-5 M, which is the required sensitivity for clinical applications.
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Affiliation(s)
- Anna D Kartashova
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia
| | - Kirill A Gonchar
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia
| | - Dmitry A Chermoshentsev
- Skolkovo Institute of Science and Technology, Center for Photonics and Quantum Materials, Bolshoy Boulevard 30, bld. 1, 143025 Moscow, Russia.,Moscow Institute of Physics and Technology, Institutskiy pereulok 9, 141701 Moscow, Russia.,Russian Quantum Center, Bolshoy Boulevard 30, bld. 1, 143025 Moscow, Russian Federation
| | - Ekaterina A Alekseeva
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia
| | - Maxim B Gongalsky
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia
| | - Ivan V Bozhev
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia.,Quantum Technology Center, Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia
| | - Andrei A Eliseev
- Lomonosov Moscow State University, Faculty of Chemistry, Leninskie Gory 1, 119991 Moscow, Russia
| | - Sergey A Dyakov
- Skolkovo Institute of Science and Technology, Center for Photonics and Quantum Materials, Bolshoy Boulevard 30, bld. 1, 143025 Moscow, Russia
| | - Jeanne V Samsonova
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia.,Lomonosov Moscow State University, Faculty of Chemistry, Leninskie Gory 1, 119991 Moscow, Russia
| | - Liubov A Osminkina
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia.,Institute for Biological Instrumentation of Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia
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2
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Ali SS, Zia MK, Siddiqui T, Ahsan H, Khan FH. Bilirubin binding affects the structure and function of alpha-2-macroglobulin. J Immunoassay Immunochem 2020; 41:841-851. [DOI: 10.1080/15321819.2020.1783290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Syed Saqib Ali
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Mohammad Khalid Zia
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Tooba Siddiqui
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Haseeb Ahsan
- Department of Biochemistry, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India
| | - Fahim Halim Khan
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
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3
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Ma Y, Chen J, Li J, Han W, Chai Y, Wang T, Zhang Q, Wang L, Wang W, Wang Z, Ou L. Selective adsorption of bilirubin against albumin to alkylamine functionalized PVA microspheres. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:337-354. [PMID: 30486758 DOI: 10.1080/09205063.2018.1553104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Adsorbents are widely used in hemoperfusion for bilirubin removal. However, their performance is often compromised by the presence of plasma proteins. In this study, the bilirubin adsorption capacity of polyvinyl alcohol microspheres (PVAm) functionalized with different amino-alkane ligands has been investigated, with the aim of gaining binding selectivity over albumin. Octylamine-functionalized PVA microspheres (PVAm-8) exhibited an excellent adsorption capacity for bilirubin (75% and 3.95 mg/mL in PBS vs 72% and 3.84 mg/mL in albumin solution) when compared to the clinical adsorbent BPR (92% and 4.84 mg/mL in PBS vs 71%, and 3.80 mg/mL in albumin solution). The bilirubin adsorption capacities of PVAm-8 were largely unaffected by the presence of albumin. Adsorption of bilirubin to PVAm-8 occurs mainly through hydrophobic effects, with adsorption consistent with the monolayer model and the pseudo-first-order model operating in both PBS and albumin solution. The effects of PVAm-8 on hemolytic activity, blood component stability and coagulant activity were negligible, indicating that PVAm-8 has good potential as a high-affinity bilirubin adsorbent for hemoperfusion applications.
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Affiliation(s)
- Yingda Ma
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Jian Chen
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Jian Li
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Wenyan Han
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Yamin Chai
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Tingting Wang
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Qian Zhang
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Lichun Wang
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Weichao Wang
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Zhexiang Wang
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
| | - Lailiang Ou
- a Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences , Nankai University , Tianjin , China
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4
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Construction of blood compatible chitin/graphene oxide composite aerogel beads for the adsorption of bilirubin. Carbohydr Polym 2018; 207:704-712. [PMID: 30600056 DOI: 10.1016/j.carbpol.2018.12.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 11/19/2018] [Accepted: 12/04/2018] [Indexed: 11/23/2022]
Abstract
Excess bilirubin in blood can provoke hepatic damage and related malfunctions. Hereby we designed and constructed a novel bilirubin adsorbent, called chitin/graphene oxide (Ch/GO) composite aerogel beads, for efficient, fast and safe removal for bilirubin. The Ch/GO aerogel beads were prepared from chitin and GO in a NaOH/urea aqueous solution, followed dried by supercritical carbon dioxide. The morphology, structure and properties of the Ch/GO composite aerogel beads were characterized by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and compressive strength measurement. The results indicated that GO was successfully bound to chitin matrix with enhanced surface area, thermal stability and mechanical strength. The adsorption capacity of Ch/GO composite aerogel beads for bilirubin was examined by UV-vis spectrophotometry. Moreover, batch adsorption results revealed that the Ch/GO composite aerogel beads showed excellent bilirubin adsorption capacity (484.1 ± 16.9 mg/g) and short adsorption equilibrium time (0.5 h) under optimized condition. Furthermore, the Ch/GO aerogel beads exhibited a lower hemolysis property and improved anticoagulant property. Hence, this work provided a new strategy to develop a novel blood compatible bilirubin adsorbent, which presented good application potential for bilirubin adsorption.
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5
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Zheng J, Wang L, Zeng X, Zheng X, Zhang Y, Liu S, Shi X, Wang Y, Huang X, Ren L. Controlling the Integration of Polyvinylpyrrolidone onto Substrate by Quartz Crystal Microbalance with Dissipation To Achieve Excellent Protein Resistance and Detoxification. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18684-18692. [PMID: 27363467 DOI: 10.1021/acsami.6b04348] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Blood purification systems, in which the adsorbent removes exogenous and endogenous toxins from the blood, are widely used in clinical practice. To improve the protein resistance of and detoxification by the adsorbent, researchers can modify the adsorbent with functional molecules, such as polyvinylpyrrolidone (PVP). However, achieving precise control of the functional molecular density, which is crucial to the activity of the adsorbent, remains a significant challenge. In the present study, we prepared a model system for blood purification adsorbents in which we controlled the integration density of PVP molecules of different molecular weights on an Au substrate by quartz crystal microbalance with dissipation (QCM-D). We characterized the samples with atomic force microscopy, X-ray photoelectron spectroscopy, and QCM-D and found that the molecular density and the chain length of the PVP molecules played important roles in determining the properties of the sample. At the optimal condition, the modified sample demonstrated strong resistance to plasma proteins, decreasing the adsorption of human serum albumin (HSA) and fibrinogen (Fg) by 92.5% and 79.2%, respectively. In addition, the modified sample exhibited excellent detoxification, and the adsorption of bilirubin increased 2.6-fold. Interestingly, subsequent atomistic molecular dynamics simulations indicated that the favorable interactions between PVP and bilirubin were dominated by hydrophobic interactions. An in vitro platelet adhesion assay showed that the adhesion of platelets on the sample decreased and that the platelets were maintained in an inactivated state. The CCK-8 assay indicated that the modified sample exhibited negligible cytotoxicity to L929 cells. These results demonstrated that our method holds great potential for the modification of adsorbents in blood purification systems.
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Affiliation(s)
- Jian Zheng
- School of Materials Science and Engineering, South China University of Technology , Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration & Reconstruction, South China University of Technology , Guangzhou 510006, China
| | - Lin Wang
- National Engineering Research Center for Tissue Restoration & Reconstruction, South China University of Technology , Guangzhou 510006, China
| | | | | | - Yan Zhang
- School of Materials Science and Engineering, South China University of Technology , Guangzhou 510641, China
| | - Sa Liu
- School of Materials Science and Engineering, South China University of Technology , Guangzhou 510641, China
| | - Xuetao Shi
- National Engineering Research Center for Tissue Restoration & Reconstruction, South China University of Technology , Guangzhou 510006, China
| | - Yingjun Wang
- School of Materials Science and Engineering, South China University of Technology , Guangzhou 510641, China
| | | | - Li Ren
- School of Materials Science and Engineering, South China University of Technology , Guangzhou 510641, China
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6
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Li S, Sun Y, Shi QH. Fabrication of high-capacity protein ion-exchangers with polymeric ion-exchange groups grafted onto micron-sized beads by atom transfer radical polymerization. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2015.07.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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7
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Bilirubin Binding with Liver Cystatin Induced Structural and Functional Changes. J Fluoresc 2014; 24:967-74. [DOI: 10.1007/s10895-014-1381-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 03/19/2014] [Indexed: 10/25/2022]
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8
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Surface-modified anodic aluminum oxide membrane with hydroxyethyl celluloses as a matrix for bilirubin removal. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 912:1-7. [DOI: 10.1016/j.jchromb.2012.10.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 09/27/2012] [Accepted: 10/01/2012] [Indexed: 11/17/2022]
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9
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Kannan P, Chen H, Lee VTW, Kim DH. Highly sensitive amperometric detection of bilirubin using enzyme and gold nanoparticles on sol–gel film modified electrode. Talanta 2011; 86:400-7. [DOI: 10.1016/j.talanta.2011.09.034] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 09/19/2011] [Accepted: 09/20/2011] [Indexed: 01/19/2023]
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10
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Wu L, Pang GC. High-Speed Large Scale Chromatographic Purification of Plasmid DNA with a Novel Giant-Pore Stationary Phase. Chromatographia 2007. [DOI: 10.1365/s10337-007-0298-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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11
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Wang DM, Hao G, Shi QH, Sun Y. Fabrication and characterization of superporous cellulose bead for high-speed protein chromatography. J Chromatogr A 2007; 1146:32-40. [PMID: 17300793 DOI: 10.1016/j.chroma.2007.01.089] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2006] [Revised: 01/24/2007] [Accepted: 01/24/2007] [Indexed: 11/17/2022]
Abstract
Novel superporous cellulose (SC) matrix has been fabricated by water-in-oil emulsification-thermal regeneration using granules of calcium carbonate as porogenic agents. As a control, microporous cellulose (MC) bead was fabricated in the absence of calcium carbonate. Simultaneously, double cross-linking was applied to enhance the mechanical strength of the particles. The photographs by scanning electron microscopy of the SC bead illustrated that there were more "craters" of several microns scattering on the surface of the beads. It led to a higher water content and effective porosity of the SC medium. The two beads were then modified with diethylaminoethyl (DEAE) group to prepare anion exchangers. The dynamic uptake results of bovine serum albumin (BSA) exhibited that the pore diffusivity of BSA in the DEAE-SC bead was two to three times larger than that in the DEAE-MC bead. In addition, the column packed with the DEAE-SC showed lower backpressure, higher column efficiency and dynamic binding capacity than the column packed with the DEAE-MC at a flow rate range of 150-900cm/h. Moreover, the column efficiency of the DEAE-SC column was independent of flow velocity up to a flow rate of 1200cm/h. All the results exhibited the superior characteristics of the SC bead as a potential medium for high-speed protein chromatography.
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Affiliation(s)
- Dong-Mei Wang
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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12
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Yang Z, Si S, Zhang C, Song G. Quartz crystal microbalance studies on bilirubin adsorption on self-assembled phospholipid bilayers. J Colloid Interface Sci 2007; 305:1-6. [PMID: 17028005 DOI: 10.1016/j.jcis.2006.09.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2006] [Revised: 09/03/2006] [Accepted: 09/17/2006] [Indexed: 11/27/2022]
Abstract
Bilirubin adsorption on self-assembled phospholipid bilayers was studied using quartz crystal microbalance, and factors influencing its adsorption such as pH, temperature, and solution ionic strength were discussed in detail. The results show the amount of adsorbed bilirubin on self-assembled phospholipid bilayers is small at higher temperature and large at higher pH and solution ionic strength, and the adsorption kinetic parameter estimated from the in situ frequency measurement is (1.8+/-0.27)x10(6) M(-1) (mean +/- S.D.). With the present method, the desorption of adsorbed bilirubin caused by human serum albumin and the photoinduced decomposition of adsorbed bilirubin under light illumination were also examined. QCM measurement provides a useful method for monitoring the adsorption/desorption process of bilirubin on self-assembled phospholipid bilayers.
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Affiliation(s)
- Zhengpeng Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
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13
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Bayramoğlu G, Yalçın E, Arıca MY. Characterization of polyethylenimine grafted and Cibacron Blue F3GA immobilized poly(hydroxyethylmethacrylate-co-glycydylmethacrylate) membranes and application to bilirubin removal from human serum. Colloids Surf A Physicochem Eng Asp 2005. [DOI: 10.1016/j.colsurfa.2005.05.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Shi W, Zhang F, Zhang G. Adsorption of bilirubin with polylysine carrying chitosan-coated nylon affinity membranes. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 819:301-6. [PMID: 15833294 DOI: 10.1016/j.jchromb.2005.02.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2004] [Revised: 12/20/2004] [Accepted: 02/18/2005] [Indexed: 10/25/2022]
Abstract
Microporous polyamide membranes were activated by bisoxirane and subsequently bound with chitosan (CS) to amplify reactive groups. Then polylysine (PLL) as ligand was immobilized onto the CS-coated nylon membranes. The contents of CS and PLL of PLL-attached membranes were 93.2 and 90.4 mg/g nylon membrane, respectively. Such PLL-attached membranes were used to adsorb bilirubin from the bilirubin-phosphate solution and bilirubin-albumin solution. The adsorption mechanism of bilirubin and the effects of temperature, initial concentration of bilirubin, albumin concentration and ionic strength on adsorption were investigated by batch experiments. The results showed that the adsorption capacity increased with increasing the temperature while decreased with increasing the NaCl concentration and albumin concentration, and the adsorption isotherm fitted the Freundlich model well. The result of dynamic experiment showed PLL-attached membranes can well remove the bilirubin from the bilirubin-albumin solution.
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Affiliation(s)
- Wei Shi
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
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15
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Shi W, Zhang F, Zhang G, Ge D, Zhang Q. Adsorption of bilirubin on poly-L-lysine-containing nylon membranes: applications in affinity chromatography. POLYM INT 2005. [DOI: 10.1002/pi.1766] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Wu L, Bai S, Sun Y. Development of rigid bidisperse porous microspheres for high-speed protein chromatography. Biotechnol Prog 2003; 19:1300-6. [PMID: 12892494 DOI: 10.1021/bp0201509] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Development of a high-performance stationary phase is an essential demand for high-speed separation of proteins by liquid chromatography. Based on a novel porogenic mode, that is, using superfine granules of calcium carbonate as solid porogen and a mixture of cyclohexanol and dodecanol as liquid porogen, a rigid spherical biporous poly(glycidyl methacrylate-co-ethylene dimethacrylate) matrix has been prepared by radical suspension-polymerization. The epoxide groups of the matrix were modified with diethylamine to afford the ionizable weak base 1-N,N-diethylamino-2-hydeoxypropy functionalities that are required for ion exchange chromatography. Results from scanning electron microscopy and mercury intrusion porosimetry measurements revealed that the matrix contained two families of pores, that is, micropores (10-90 nm) and macropores (180-4000 nm). Furthermore, the biporous medium possesses specific surface area as high as 91.3 m(2)/g. Because of the presence of the macropores that provided convective flow channels for the mobile phase, the dynamic adsorption capacity was found to be as high as 54.6 mg/g wet bead at 300 cm/h, approximately 63.2% of its static capacity. In addition, the column efficiency and dynamic binding capacity decreased only slightly with mobile-phase flow rate in the range of 300-3000 cm/h. These properties made the packed bed with the bidisperse porous matrix suitable for high-speed protein chromatography.
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Affiliation(s)
- Lei Wu
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
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17
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Williams CK, Galley WC, Brown GR. The influence of competing factors on the endothermic nature of bile salt binding by cationic adsorbent. CAN J CHEM 2003. [DOI: 10.1139/v03-003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The binding of sodium chenodeoxycholate, a hydrophobic bile salt, by a polyacrylamide resin with N,N,N-trimethylammonium dodecyl chloride (QPDA12) pendant groups was studied in the presence of elevated concentrations of competing anions. The equilibrium bile salt concentration was determined from HPLC data for a range of initial bile salt concentrations. Binding constants extracted from the fit of the isotherms to the Langmuir equation were obtained for data for temperatures from 24 to 60°C. A reduction in chenodeoxycholate binding affinity was observed in comparison with that reported previously at lower overall anion concentrations. A van't Hoff analysis of the data revealed that a decrease in the favourable entropy of binding was responsible for this reduced affinity. Decomposition of the binding constants into specific contributions for the competing buffer anions and the chenodeoxycholate anion returned positive values of ΔH° and ΔS° for the binding of both the competing ions and bile salt. These findings reveal that the weakening of the bile salt binding that occurs with added salt is not due to Debye screening of an attraction between ions of opposite charge. A binding mechanism consistent with the thermodynamics observed was proposed in which the dominant role of hydration changes that occur on binding provides the principal driving force for the process.Key words: bile salts, endothermic binding, polymer sorbents, solvent randomization.
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18
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Shi Y, Sun Y. Fabrication and characterization of a novel biporous spherical adsorbent for protein chromatography. Chromatographia 2003. [DOI: 10.1007/bf02497474] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Zhou X, Xue B, Bai S, Sun Y. Macroporous polymeric ion exchanger of high capacity for protein adsorption. Biochem Eng J 2002. [DOI: 10.1016/s1369-703x(02)00007-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Shi Y, Dong XY, Sun Y. Development of rigid biporous polymeric adsorbent for protein chromatography. Chromatographia 2002. [DOI: 10.1007/bf02492268] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Williams CK, Galley WC, Brown GR. The endothermic nature of the binding of anionic bile salts to a cationic adsorbent. CAN J CHEM 2002. [DOI: 10.1139/v01-197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The binding of a hydrophobic bile salt, sodium chenodeoxycholate, by a polyacrylamide with N,N,N-trimethylammonium dodecyl chloride (QPDA12) pendant groups was studied to evaluate the thermodynamic parameters associated with the binding. The Langmuir equation was used in interpreting the data obtained from HPLC measurements. An increase in binding affinity was observed with increasing temperature indicating that the driving force for binding is derived from an increase in entropy (ΔS° = 253 J mol1K1) despite the positive, or unfavourable, enthalpy change (ΔH° = 53 kJ mol1). The positive thermodynamic parameters associated with the binding suggest that the disruption of hydrophobic and (or) ionic hydration associated with the bile salts and cationic polymer is the driving force for the binding.Key words: bile salts, endothermic binding, polymer sorbents, solvent randomization.
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22
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Zhu XX, Brizard F, Piché J, Yim CT, Brown GR. Bile Salt Anion Sorption by Polymeric Resins: Comparison of a Functionalized Polyacrylamide Resin with Cholestyramine. J Colloid Interface Sci 2000; 232:282-288. [PMID: 11097762 DOI: 10.1006/jcis.2000.7157] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cholestyramine and a cross-linked polyacrylamide resin with lateral alkyl quaternary ammonium groups (QPDA12) were used to study their ability to bind several bile salt anions (including the cholate, glycocholate, taurocholate, and chenodeoxycholate), individually and competitively, from phosphate buffer solutions at room temperature. The latter resin showed high affinities for all the bile salt anions examined, while cholestyramine exhibited a high affinity only for the more hydrophobic chenodeoxycholate. However, for the binding with cholestyramine, cooperative effects were more pronounced, leading to the enhancement of sorption at higher concentrations. The Langmuir equation and its modified versions were used in the interpretation of both individual and competitive binding of bile salts. The data from competitive binding studies indicated that the presence of the tightly bound chenodeoxycholate did not significantly diminish the ability of QPDA12 resin to bind cholate. However, for cholestyramine, the sorption of chenodeoxycholate increased the relative binding affinity for the more hydrophilic cholate, revealing a novel "cooperative" effect involving different bile salt anions. The latter results suggest that the observed higher affinity of QPDA12 is brought about predominantly through the hydrophobic interactions with the pendant alkyl groups rather than with the resin backbone. Copyright 2000 Academic Press.
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Affiliation(s)
- XX Zhu
- Département de chimie, Université de Montréal, succursale Centre-ville, Montréal, Quebec, H3C 3J7, Canada
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Zarras P, Vogl O. POLYCATIONIC SALTS. 3. SYNTHESIS, STYRENE BASED TRIALKYLAMMONIUM SALTS AND THEIR POLYMERIZATION1-21, 2. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2000. [DOI: 10.1081/ma-100101125] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Yu Y, Sun Y. Macroporous poly(glycidyl methacrylate-triallyl isocyanurate-divinylbenzene) matrix as an anion-exchange resin for protein adsorption. J Chromatogr A 1999; 855:129-36. [PMID: 10514978 DOI: 10.1016/s0021-9673(99)00648-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A novel macroporous poly(glycidyl methacrylate-triallyl isocyanurate-divinylbenzene) matrix was prepared by a radical suspension copolymerization. The matrix contained epoxy groups, so diethylaminohydroxypropyl groups were coupled to the matrix, leading to an anion-exchange resin. We studied the components, surface and pore structures of the anion-exchange resin by Fourier transform infared spectroscopy and scanning electron microscopy (SEM). SEM observations showed that the resin abounded in macropores as large as 3 to 8 microns both in the surface and the interior. The back-pressure of the column packed with the resin was modest even at a high flow-rate (60.2 cm/min). Then, bovine serum albumin (BSA) was used as a model protein to examine the adsorption properties of the anion-exchange resin. The results showed that under optimum conditions the resin had a capacity as high as 22.8 mg BSA/g wet resin, or 68.7 mg/g dry resin. The adsorbed protein could be desorbed by increasing the liquid phase ionic strength. Most importantly, the matrix had little nonspecific adsorption for BSA before introducing the ion-exchange groups.
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Affiliation(s)
- Y Yu
- Department of Biochemical Engineering, Tianjin University, China
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Yihua YU, Binglin HE. A new low density lipoprotein (LDL) adsorbent. ARTIFICIAL CELLS, BLOOD SUBSTITUTES, AND IMMOBILIZATION BIOTECHNOLOGY 1997; 25:445-50. [PMID: 9285045 DOI: 10.3109/10731199709118933] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Crosslinked O-Carboxymethyl (O-CM) Chitosan beads were prepared by the reaction of O-CM Chitosan with glutaraldehyde solution. Results in vitro experiments with this new developed LDL adsorbent are presented. This adsorbent is capable of cutting down LDL-Cholesterol without significantly affecting HDL and TP (Total Proteins) levels in the plasma.
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Affiliation(s)
- Y U Yihua
- Institute of Polymer Chemistry, Nankai University, Tianjin, China
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Marentette JM, Zhu XX, Clas SD, Brown GR. Polylysine-coated polyacrylamide resins as sorbents for bile acids. J Pharm Sci 1993; 82:855-6. [PMID: 8377129 DOI: 10.1002/jps.2600820822] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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