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Zhao H, Lin X, Wang L, Yang Y, Zhu H, Li Z, Su Z, Yu R, Zhang S. Pore-blocking steric mass-action model for adsorption of bioparticles. J Chromatogr A 2024; 1726:464968. [PMID: 38723492 DOI: 10.1016/j.chroma.2024.464968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 05/01/2024] [Accepted: 05/04/2024] [Indexed: 05/23/2024]
Abstract
The steric mass-action (SMA) model has been widely reported to describe the adsorption of proteins in different types of chromatographic adsorbents. Here in the present work, a pore-blocking steric mass-action model (PB-SMA) was developed for the adsorption of large-size bioparticles, which usually exhibit the unique pore-blocking characteristic on the adsorbent and thus lead to a fraction of ligands in the deep channels physically inaccessible to bioparticles adsorption, instead of being shielded due to steric hindrance by adsorbed bioparticles. This unique phenomenon was taken into account by introducing an additional parameter, Lin, which is defined as the inaccessible ligand densities in the physically blocked pore area, into the PB-SMA model. This fraction of ligand densities (Lin) will be deducted from the total ligand (Lt) for model development, thus the steric factor (σ) in the proposed PB-SMA will reflect the steric shielding effect on binding sites by adsorbed bioparticles more accurately than the conventional SMA model, which assumes that all ligands on the adsorbent have the same accessibility to the bioparticles. Based on a series of model assumptions, a PB-SMA model was firstly developed for inactivated foot-and-mouth disease virus (iFMDV) adsorption on immobilized metal affinity chromatography (IMAC) adsorbents. Model parameters for static adsorption including equilibrium constant (K), characteristic number of binding sites (n), and steric factor (σ) were determined. Compared with those derived from the conventional SMA model, the σ values derived from the PB-SMA model were dozens of times smaller and much closer to the theoretical maximum number of ligands shielded by a single adsorbed iFMDV, indicating the modified model was more accurate for bioparticles adsorption. The applicability of the PB-SMA model was further validated by the adsorption of hepatitis B surface antigen virus-like particles (HBsAg VLPs) on an ion exchange adsorbent with reasonably improved accuracy. Thus, it is considered that the PB-SMA model would be more accurate in describing the adsorption of bioparticles on different types of chromatographic adsorbents.
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Affiliation(s)
- Hanying Zhao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China; State Key Laboratory of Biochemical Engineering, Key Laboratory of Biopharmaceutical Preparation and Delivery (CAS), Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Xuan Lin
- State Key Laboratory of Biochemical Engineering, Key Laboratory of Biopharmaceutical Preparation and Delivery (CAS), Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Liuyang Wang
- State Key Laboratory of Biochemical Engineering, Key Laboratory of Biopharmaceutical Preparation and Delivery (CAS), Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yanli Yang
- Tecon Pharmaceutical Co., Ltd., Suzhou, 215000, China
| | - Hongyu Zhu
- State Key Laboratory of Biochemical Engineering, Key Laboratory of Biopharmaceutical Preparation and Delivery (CAS), Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Japan
| | - Zhengjun Li
- State Key Laboratory of Biochemical Engineering, Key Laboratory of Biopharmaceutical Preparation and Delivery (CAS), Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhiguo Su
- State Key Laboratory of Biochemical Engineering, Key Laboratory of Biopharmaceutical Preparation and Delivery (CAS), Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Rong Yu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China.
| | - Songping Zhang
- State Key Laboratory of Biochemical Engineering, Key Laboratory of Biopharmaceutical Preparation and Delivery (CAS), Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
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Porfirio MCP, Santos JB, Alves AN, Santos LS, Bonomo RCF, da Costa Ilhéu Fontan R. Purification of pineapple bromelain by IMAC chromatography using chlorophyll-activated macroporous matrices. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1234:124027. [PMID: 38320436 DOI: 10.1016/j.jchromb.2024.124027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/08/2024] [Accepted: 01/20/2024] [Indexed: 02/08/2024]
Abstract
This study investigated the purification of bromelain obtained from pineapple fruit using a new adsorbent for immobilized metal ion affinity chromatography (IMAC), with chlorophyll obtained from plant leaves as a chelating agent. The purification of bromelain was evaluated in batches from the crude extract of pineapple pulp (EXT), and the extract precipitated with 50 % ammonium sulfate (EXT.PR), the imidazole buffer (200 mM, pH 7.2) being analyzed and sodium acetate buffer, pH 5.0 + 1.0 NaCl as elution solutions. All methods tested could separate forms of bromelain with molecular weights between ±21 to 25 kDa. Although the technique using EXT.PR stood out in terms of purity, presenting a purification factor of around 3.09 ± 0.31 for elution with imidazole and 4.23 ± 0.12 for acetate buffer solution. In contrast, the EXT methods obtained values between 2.44 ± 0.23 and 3.21 ± 0.74 for elution with imidazole and acetate buffer, respectively, for purification from EXT.PR has lower yield values (around 5 %) than EXT (around 15 %). The number of steps tends to reduce yield and increase process costs, so the purification process in a monolithic bed coupled to the chromatographic system using the crude extract was evaluated. The final product obtained had a purification factor of 6, with a specific enzymatic activity of 59.61 ± 0.00 U·mg-1 and a yield of around 39 %, with only one band observed in the SDS-PAGE electrophoresis analysis, indicating that the matrix produced can separate specific proteins from the total fraction in the raw material. The IMAC matrix immobilized with chlorophyll proved promising and viable for application in protease purification processes.
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Affiliation(s)
- Márjorie Castro Pinto Porfirio
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Jonathan Barbosa Santos
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Annie Nolasco Alves
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Leandro Soares Santos
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Renata Cristina Ferreira Bonomo
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Rafael da Costa Ilhéu Fontan
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil.
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Leiva CL, Geoghegan P, Lammer M, Cangelosi A, Mariconda V, Celi AB, Brero ML, Chacana P. In vivo neutralization of bee venom lethality by IgY antibodies. Mol Immunol 2021; 135:183-190. [PMID: 33930713 DOI: 10.1016/j.molimm.2021.04.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/24/2021] [Accepted: 04/16/2021] [Indexed: 12/16/2022]
Abstract
Bee venom is a complex mixture of molecules, among which melittin and phospholipase A2 (PLA2) are the toxic components involved in envenoming accidents with multiple honeybee stings. Traditionally, the treatment of envenomings has been based on the administration of specific antibodies to neutralize the deleterious effects of toxins. An alternative to mammalian polyclonal antibodies is the use of egg yolk immunoglobulins (IgY) due to their advantages regarding animal welfare and lower costs of production as compared to the conventional production methods. In this work, a novel composition containing specific IgY antibodies was developed. After four immunizations, IgY extracted from the egg yolks was able to recognize several components of the bee venom, including melittin and PLA2. The performance of IgY to neutralize the lethal activity was evaluated in a mouse model by using one median lethal dose (LD50) of the bee venom. The effective dose of the IgY extract was determined as 30.66 μg/mg. These results demonstrate the feasibility to produce IgY-based antivenoms to treat envenomings by multiple bee stings.
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Affiliation(s)
- Carlos Leónidas Leiva
- Instituto de Patobiología, Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros S/N, Hurlingham, Buenos Aires, Argentina; Instituto de Patobiología Veterinaria, UEDD INTA-CONICET, Nicolas Repetto y Los Reseros S/N, Hurlingham, Buenos Aires, Argentina.
| | - Patricia Geoghegan
- Centro Nacional de Control de Calidad de Biológicos, ANLIS "Dr. Carlos G. Malbrán", Av. Vélez, Sarsfield 563, CABA, Argentina.
| | - Mónica Lammer
- Centro Nacional de Control de Calidad de Biológicos, ANLIS "Dr. Carlos G. Malbrán", Av. Vélez, Sarsfield 563, CABA, Argentina.
| | - Adriana Cangelosi
- Centro Nacional de Control de Calidad de Biológicos, ANLIS "Dr. Carlos G. Malbrán", Av. Vélez, Sarsfield 563, CABA, Argentina.
| | - Virginia Mariconda
- Centro Nacional de Control de Calidad de Biológicos, ANLIS "Dr. Carlos G. Malbrán", Av. Vélez, Sarsfield 563, CABA, Argentina.
| | - Ana Beatriz Celi
- Instituto de Patobiología, Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros S/N, Hurlingham, Buenos Aires, Argentina; Instituto de Patobiología Veterinaria, UEDD INTA-CONICET, Nicolas Repetto y Los Reseros S/N, Hurlingham, Buenos Aires, Argentina.
| | - María Luisa Brero
- Centro Nacional de Control de Calidad de Biológicos, ANLIS "Dr. Carlos G. Malbrán", Av. Vélez, Sarsfield 563, CABA, Argentina.
| | - Pablo Chacana
- Instituto de Patobiología, Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros S/N, Hurlingham, Buenos Aires, Argentina; Instituto de Patobiología Veterinaria, UEDD INTA-CONICET, Nicolas Repetto y Los Reseros S/N, Hurlingham, Buenos Aires, Argentina.
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Shi Q, Su M, Yuvaraja G, Tang J, Kong L, Chen D. Development of highly efficient bundle-like hydroxyapatite towards abatement of aqueous U(VI) ions: Mechanism and economic assessment. JOURNAL OF HAZARDOUS MATERIALS 2020; 394:122550. [PMID: 32299040 DOI: 10.1016/j.jhazmat.2020.122550] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 03/13/2020] [Accepted: 03/15/2020] [Indexed: 06/11/2023]
Abstract
The exploration of emergency materials with ultra-fast adsorption rate and great adsorption capability of released U(VI) ions is essentially urgent. The present work successfully fabricated bundle-like hydroxyapatite (B-HAP) microstructures which composed of numerous nanorods by employing a facile and green method. The B-HAP was applied to treat the U(VI) containing wastewater. The abatement of U(VI) by B-HAP was very rapid and the saturated adsorption capacity was superior; over 96.7 % of U(VI) was abated within 5 min, and the maximum adsorption capacity was as high as to 1305 mg/g, signifying the feasibility and effectiveness of this B-HAP in the treatment of uranium-contaminated wastewater due to nuclear accidents. It is worthy to note that other ions in solution exhibited relatively low interference on its performance, indicating that B-HAP has great application potential to capture U(VI) from radioactive-contaminated wastewater as well. The U(VI) removal mechanism by B-HAP was confirmed with results from XRD, FT-IR and XPS. Chernikovite [H2(UO2)2(PO4)2·8H2O] was newly formed after U(VI) abatement by B-HAP. Economic assessment suggested B-HAP and its application on U(VI) abatement were cost-effective. With characteristics of high adsorption rate, large capacity, and strong antijamming ability, B-HAP has great application potential as an emergency treatment material for nuclear accidents.
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Affiliation(s)
- Qingpu Shi
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou, 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Minhua Su
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou, 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China.
| | - Gutha Yuvaraja
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou, 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Jinfeng Tang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Linköping University - Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou, 510006, China
| | - Lingjun Kong
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou, 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou, 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China.
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Chen L, Yun J, Zhang H, Dai B. Association equilibrium model. I. Influence of pH and salt concentration on ion-exchanger. J Chromatogr A 2019; 1595:49-57. [PMID: 30853163 DOI: 10.1016/j.chroma.2019.02.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 02/02/2019] [Accepted: 02/12/2019] [Indexed: 01/21/2023]
Abstract
An association equilibrium model is presented in this work to illustrate the charged state of an ion-exchange adsorbent in electrolytic solution. This semi-empirical model considers the adsorption equilibrium of hydrogen ions and small-molecular salt ions with adsorbents, and it can be used to describe the effects of pH and salt concentration on the zeta potential, associated hydrogen ions and ionic capacity of adsorbents. The association equilibrium parameters of four commercial adsorbents were obtained by experimental data fitting. The model fitted the experimental data well, and their coefficients of determination (R2) of four adsorbents ranged from 0.924 to 0.994. The ratio coefficients of the association reaction with hydrogen ions ranged from 0.15 to 0.44 and those with salt counter-ions were all one. These data demonstrated that association reactions followed stoichiometric law, but that ionizable groups on ion-exchangers could not freely ionize as small molecule ions in solution. In this way, the performance of ion-exchange adsorbents can be characterized based on the zeta potential and dissociated hydrogen ions, and the results from this model were consistent with that from the manufacturer. Furthermore, this model could easily be expanded for multi-component systems.
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Affiliation(s)
- Liang Chen
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China
| | - Junxian Yun
- State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Changwang Road 18, Hangzhou 310032, China
| | - Haiyan Zhang
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China.
| | - Bin Dai
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China.
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Süngü Ç, Kip Ç, Tuncel A. Molecularly imprinted polymeric shell coated monodisperse-porous silica microspheres as a stationary phase for microfluidic boronate affinity chromatography. J Sep Sci 2019; 42:1962-1971. [PMID: 30900808 DOI: 10.1002/jssc.201801258] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 03/17/2019] [Accepted: 03/19/2019] [Indexed: 12/11/2022]
Abstract
Molecular imprinting of cis-diol functionalized agents via boronate affinity interaction has been usually performed using nanoparticles as a support which cannot be utilized as a stationary phase in continuous microcolumn applications. In this study, monodisperse-porous, spherical silica particles in the micron-size range, with bimodal pore diameter distribution were selected as a new support for the synthesis of a molecularly imprinted boronate affinity sorbent, using a cis-diol functionalized agent as the template. A specific surface area of 158 m2 /g was achieved with the imprinted sorbent by using monodisperse-porous silica microspheres containing both mesoporous and macroporous compartments as the support. High porosity originating from the macroporous compartment and sufficiently high particle size provided good column permeability to the imprinted sorbent in microcolumn applications. The mesoporous compartment provided a large surface area for the parking of imprinted molecules while the macroporous compartment facilitated the intraparticular diffusion of imprinted target within the microsphere interior. A microfluidic boronate affinity system was first constructed by using molecularly imprinted polymeric shell coated monodisperse-porous silica microspheres as a stationary phase. The synthetic route for the imprinting process, the reversible adsorption/ desorption behavior of selected target and the selectivity of imprinted sorbent in both batch and microfluidic boronate affinity chromatography systems are reported.
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Affiliation(s)
| | - Çiğdem Kip
- Department of Chemical Engineering, Hacettepe University, Ankara, Turkey
| | - Ali Tuncel
- Department of Chemical Engineering, Hacettepe University, Ankara, Turkey
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Wan B, Li J, Ma F, Yu N, Zhang W, Jiang L, Wei H. Preparation and Properties of Cryogel Based on Poly(2-hydroxyethyl methacrylate- co-glycidyl methacrylate). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3284-3294. [PMID: 30739457 DOI: 10.1021/acs.langmuir.8b04021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The immobilized metal affinity cryogels based on poly(2-hydroxyethyl methacrylate- co-glycidyl methacrylate) (p(HEMA-GMA)) containing hydroxy and epoxy groups were prepared by free-radical copolymerization under cryogenic condition and then functionalized with iminodiacetic acid and chelated Cu2+, Ca2+, and Fe3+ ions to the p(HEMA-GMA) cryogel. The structures of p(HEMA-GMA) and immobilized metal-affinity cryogels were analyzed by Fourier transform infrared spectroscopy and scanning electron microscopy (SEM)-energy dispersive X-ray spectroscopy. SEM results showed that the prepared cryogels had interconnected pores with the size of 30-100 μm. The performance of water swelling into the cryogels was fitted in Fickian diffusion. The adsorption property of cryogels was influenced by the immobilized ionic type, temperature, and adsorbate. The adsorption capacity of immobilized Cu2+ cryogel (p(HEMA)-Cu2+ (0.5 M) cryogel) was the highest in comparison with that of Ca2+ and Fe3+ affinity cryogels under the same condition. The maximum adsorption capacity of p(HEMA)-Cu2+ (0.5 M) cryogel for porcine pancreatic lipase was 150.14 mg/g at a higher temperature of 35 °C, whereas for bovine serum albumin, the maximum adsorption capacity was 154.11 mg/g at a lower temperature of 25 °C. The research of thermodynamics and kinetics indicated that the mechanism of the protein adsorption process corresponded to the Langmuir model and pseudo-second-order model.
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Affiliation(s)
- Binbin Wan
- School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan 250353 , P. R. China
| | - Junying Li
- School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan 250353 , P. R. China
- Shandong Provincial Key Laboratory for Special Silicone-Containing Materials , Jinan 250014 , P. R. China
| | - Feng Ma
- School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan 250353 , P. R. China
| | - Ning Yu
- School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan 250353 , P. R. China
| | - Wenjing Zhang
- School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan 250353 , P. R. China
| | - Lujie Jiang
- School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan 250353 , P. R. China
| | - Hengshan Wei
- School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan 250353 , P. R. China
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Lai WJ, Lin SC. Hydroxyethyl cellulose-grafted loofa sponge-based metal affinity adsorbents for protein purification and enzyme immobilization. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.08.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Lv R, Chen Y, Xia N, Liang Y, He Q, Li M, Qi Z, Lu Y, Zhao S. Development of a double-antibody sandwich ELISA for rapid detection to C-peptide in human urine. J Pharm Biomed Anal 2018; 162:179-184. [PMID: 30261444 DOI: 10.1016/j.jpba.2018.07.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/18/2018] [Accepted: 07/29/2018] [Indexed: 01/18/2023]
Abstract
C-peptide level is recognized as an important indicator of diabetes diagnosis. A sensitive and specific double-antibody sandwich enzyme-linked immunosorbent assay for the detection of C-peptide based on double antibody sandwich method was studied in this paper. The rabbit and hen were innunized with PLL-C-peptide and BSA-C-peptide respectively to obtain specific Yolk antibody (IgY) and polyclonal antibody used to construct the sandwich ELISA for the measurement of C-peptide. The limit of detection was 0.51 μg/mL and the half maximal inhibitory concentration (IC50) was 3.26 μg/mL. The method developed in the study showed no evident cross-reactivity with other similar analogs. The detection standard curve of C-peptide exhibited a good linearity (R2 = 0.9896, n = 15). 17 types of the urine of diabetes patients on c-peptide levels compared with the hospital type of diabetes information, with a conclusion of a high consistent rate. Therefore, the methods could be selectively used for rapid screening of C-peptide in human urine, and the type of diabetes has some referential significance.
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Affiliation(s)
- Rui Lv
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, People's Republic of China.
| | - Yingshan Chen
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, People's Republic of China.
| | - Nana Xia
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, People's Republic of China.
| | - Yuxin Liang
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, People's Republic of China.
| | - Qiyi He
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, People's Republic of China.
| | - Minyou Li
- Guangzhou Jinde Biotechnology Co., LTD, Guangzhou 510663, People's Republic of China.
| | - Zongxian Qi
- Guangzhou Jinde Biotechnology Co., LTD, Guangzhou 510663, People's Republic of China.
| | - Yeyu Lu
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, People's Republic of China.
| | - Suqing Zhao
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, People's Republic of China.
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Elviro M, Vega M, Martín del Valle EM, Ángel Galán M. Preparation and characterization of a macroporous agarose monolith as a stationary phase in IMAC chromatography. CHEM ENG COMMUN 2018. [DOI: 10.1080/00986445.2018.1483352] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Montaña Elviro
- Chemical Engineering Department, University of Salamanca P/Los Caidos, Spain
| | - Milena Vega
- Chemical Engineering Department, University of Salamanca P/Los Caidos, Spain
| | | | - Miguel Ángel Galán
- Chemical Engineering Department, University of Salamanca P/Los Caidos, Spain
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Zhai M, Ma F, Li J, Wan B, Yu N. Preparation and properties of cryogel based on poly(hydroxypropyl methacrylate). JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:1401-1425. [PMID: 29667520 DOI: 10.1080/09205063.2018.1464263] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A novel supermacroporous poly(hydroxypropyl methacrylate) (p(HPMA)) cryogel was synthesized by cryogelation method at -16 °C. In this synthesis process, HPMA was used as a monomer, and N,N'-methylenebisacrylamide (MBAAm) was used as cross-linker; the reaction was carried out in the presence of redox initiator pair N,N,N',N'-tetramethylene diamine (TEMED) and ammonium persulfate (APS). The effect of monomer concentration, cross-linker content, cooling rate, and dioxane co-solvent were determined with respect to the pore structure, mechanical behavior, swelling degree, and porosity of cryogel. The ESEM images indicate that the pore wall structure of cryogels was rough; moreover, small holes were present in the pore walls of cryogels. The result of compression test indicates that cryogels can be compressed by at least 80% without any breakdown. The result of swelling kinetics indicates that cryogels attain swelling equilibrium in 10 s. Furthermore, p(HPMA)-Cu2+ cryogel was prepared by loading Cu2+ ions on functionalized poly(hydroxypropyl methacrylate)-iminodiacetic acid (p(HPMA)-IDA) cryogel. We investigated the adsorption of bovine serum albumin (BSA) on cryogels. The results indicate that compared to Freundlich isotherm, Langmuir isotherm could more suitably describe the adsorption process of BSA on cryogels. Meanwhile, the adsorption capacity of p(HPMA)-Cu2+ cryogel was significantly greater than that of p(HPMA) cryogel. The maximum adsorption capacity of BSA on p(HPMA)-Cu2+ cryogel, which was treated with 1 M Cu2+ ions, was as high as 196.87 mg/g cryogel (equivalent to 20.48 mg/mL cryogel) at 25 °C and pH = 7.8; therefore, the maximum adsorption capacity of BSA on p(HPMA)-Cu2+ cryogel was 4.35 times higher than that of p(HPMA) cryogel. Thus, the adsorption capacity of cryogels was strongly influenced by Cu2+ concentration, moreover, temperature changes clearly affected the adsorption capacity of p(HPMA)-Cu2+cryogel. The adsorption capacity at 25 °C was twice as that at 15 °C. By calculating Gibbs free energy change (∆G) of adsorption, we found that the adsorption process was spontaneous; moreover, adsorption process occurred better at higher temperature.
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Affiliation(s)
- Mengfan Zhai
- a School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan , China
| | - Feng Ma
- a School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan , China
| | - Junying Li
- a School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan , China
| | - Binbin Wan
- a School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan , China
| | - Ning Yu
- a School of Chemistry and Pharmaceutical Engineering , Qilu University of Technology (Shandong Academy of Sciences) , Jinan , China
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Acet Ö, Baran T, Erdönmez D, Aksoy NH, Alacabey İ, Menteş A, Odabaşi M. O-carboxymethyl chitosan Schiff base complexes as affinity ligands for immobilized metal-ion affinity chromatography of lysozyme. J Chromatogr A 2018; 1550:21-27. [PMID: 29609862 DOI: 10.1016/j.chroma.2018.03.022] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 02/26/2018] [Accepted: 03/13/2018] [Indexed: 01/26/2023]
Abstract
We synthesized Ni2+-attached O-Carboxymethyl chitosan Schiff base complexes embedded composite cryogels (Ni2+-O-CMCS-CCs) by means of polymerization of gel-forming precursors at subzero temperatures. Prepared affinity cryogel showed excellent adsorption performance for lysozyme selected as model protein to test adsorption parameters, demonstrating an adsorption capacity of 244.6 mg/g (15.3 mg/g for Ni2+ minus O-CMCS-CCs), with fast adsorption equilibrium within 30 min and good reversibility. The performance of Ni2+-O-CMCS-CCs for lysozyme was also evaluated by SDS-PAGE, and a purification efficiency of 86.9% with 89.5% purification yield was determined. The swelling test, FT-IR, and SEM analysis were carried out for the characterization of Ni2+-O-CMCS-CCs. At the end of 35 adsorption-desorption cycles, there was no significant change in the adsorption capacity.
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Affiliation(s)
- Ömür Acet
- Aksaray University, Faculty of Arts and Science, Chemistry Department, Aksaray, Turkey
| | - Talat Baran
- Aksaray University, Faculty of Arts and Science, Chemistry Department, Aksaray, Turkey
| | - Demet Erdönmez
- Aksaray University, Faculty of Arts and Science, Biology Department, Aksaray, Turkey
| | - Neşe Hayat Aksoy
- Aksaray University, Faculty of Veterinary Medicine, Aksaray, Turkey
| | - İhsan Alacabey
- Mardin Artuklu University, Vocational School of Health Services, Mardin, Turkey
| | - Ayfer Menteş
- Aksaray University, Faculty of Arts and Science, Chemistry Department, Aksaray, Turkey
| | - Mehmet Odabaşi
- Aksaray University, Faculty of Arts and Science, Chemistry Department, Aksaray, Turkey.
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Sheng L, He Z, Liu Y, Ma M, Cai Z. Mass spectrometry characterization for N-glycosylation of immunoglobulin Y from hen egg yolk. Int J Biol Macromol 2018; 108:277-283. [DOI: 10.1016/j.ijbiomac.2017.12.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 11/30/2017] [Accepted: 12/04/2017] [Indexed: 01/26/2023]
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Baysal Z, Aksoy E, Dolak İ, Ersöz A, Say R. Adsorption behaviours of lysozyme onto poly-hydroxyethyl methacrylate cryogels containing methacryloyl antipyrine-Ce(III). INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2017.1320655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Zübeyde Baysal
- Department of Chemistry, Faculty of Science, Dicle University, Diyarbakir, Turkey
| | - Eyyüp Aksoy
- Department of Chemistry, Faculty of Science, Dicle University, Diyarbakir, Turkey
| | - İbrahim Dolak
- Technical Science, Vocational High School, Dicle University, Diyarbakir, Turkey
| | - Arzu Ersöz
- Department of Chemistry, Faculty of Science, Anadolu University, Eskişehir, Turkey
| | - Rıdvan Say
- Department of Chemistry, Faculty of Science, Anadolu University, Eskişehir, Turkey
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Multiclonal plastic antibodies for selective aflatoxin extraction from food samples. Food Chem 2017; 221:829-837. [DOI: 10.1016/j.foodchem.2016.11.090] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 11/10/2016] [Accepted: 11/20/2016] [Indexed: 11/17/2022]
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