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Assessment of a new dual effective combo polymer structure for separation of lysozyme from hen egg white. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-019-02959-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zizzo N, Passantino G, D'alessio RM, Tinelli A, Lopresti G, Patruno R, Tricarico D, Maqoud F, Scala R, Zito FA, Ranieri G. Thymidine Phosphorylase Expression and Microvascular Density Correlation Analysis in Canine Mammary Tumor: Possible Prognostic Factor in Breast Cancer. Front Vet Sci 2019; 6:368. [PMID: 31709268 PMCID: PMC6823610 DOI: 10.3389/fvets.2019.00368] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/04/2019] [Indexed: 12/14/2022] Open
Abstract
Purpose: The thymidine phosphorylase (TP) is a key enzyme involved in the metabolism of pyrimidines. Inhibition or downregulation of this enzyme causes accumulation of metabolites with consequences in DNA replication. TP regulates angiogenesis and chemotactic activity of endothelial cells. Different studies showed the presence of TP upregulation in human cancer but the correlation between TP expression and the microvascular density (MVD) in canine mammary tumors is unknown. The aim of this study was to investigate a possible correlation between the MVD and TP expression in tumor cells of canine mammary tumors of different degree of severity (G1–G3) by immunohistochemical analysis. Methods: Sixty-eight samples of spontaneous mammary neoplasia of 5–12 cm in diameter were collected from purebred and mixed-breed dogs (mean aged = 9.5 ± 7), not subject to chemotherapy treatments in veterinary clinics. Histopathological analysis and immunostaining were performed. Results: Carcinoma simple samples have been classified as 72.06% of tubule-papillary, 20.59% cysto-papillary, and 7.35% tubular carcinomas. Immunostainings revealed a marked cytoplasmic expression of TP in 30.88% of samples, mild in 32.35%, weaker in 22.07%, and negative in 14.70%. The correlation analysis and two-way ANOVA showed a linear correlation between MVD and TP with a coefficient of correlation (r) > 0.5 (p < 0.05) in G2 and G3. No correlation between variables was found in G1. Conclusions: These findings suggest that cytoplasmic TP overexpression is correlated with microvascular density in canine mammary tumors, in severe grade, and it can be a potential prognostic factor in breast cancer.
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Affiliation(s)
- Nicola Zizzo
- Section of Veterinary Pathology and Comparative Oncology, Department of Veterinary Medicine, University of Bari "Aldo Moro", Valenzano, Italy
| | - Giuseppe Passantino
- Section of Veterinary Pathology and Comparative Oncology, Department of Veterinary Medicine, University of Bari "Aldo Moro", Valenzano, Italy
| | - Roberta Maria D'alessio
- Section of Veterinary Pathology and Comparative Oncology, Department of Veterinary Medicine, University of Bari "Aldo Moro", Valenzano, Italy.,MD Freelancer, Bristol, United Kingdom
| | - Antonella Tinelli
- Section of Veterinary Pathology and Comparative Oncology, Department of Veterinary Medicine, University of Bari "Aldo Moro", Valenzano, Italy
| | - Giuseppe Lopresti
- Section of Veterinary Pathology and Comparative Oncology, Department of Veterinary Medicine, University of Bari "Aldo Moro", Valenzano, Italy
| | - Rosa Patruno
- Section of Veterinary Pathology and Comparative Oncology, Department of Veterinary Medicine, University of Bari "Aldo Moro", Valenzano, Italy
| | - Domenico Tricarico
- Section of Pharmacology, Department of Pharmacy-Pharmaceutical Sciences, University of Bari, Bari, Italy
| | - Fatima Maqoud
- Section of Pharmacology, Department of Pharmacy-Pharmaceutical Sciences, University of Bari, Bari, Italy
| | - Rosa Scala
- Section of Pharmacology, Department of Pharmacy-Pharmaceutical Sciences, University of Bari, Bari, Italy
| | - Francesco Alfredo Zito
- Interventional and Medical Oncology Unit, Department of Pathology National Cancer Research Centre, IRCCS Istituto Tumori Giovanni Paolo II, Bari, Italy
| | - Girolamo Ranieri
- Interventional and Medical Oncology Unit, Department of Pathology National Cancer Research Centre, IRCCS Istituto Tumori Giovanni Paolo II, Bari, Italy
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Acet Ö, Aksoy NH, Erdönmez D, Odabaşı M. Determination of some adsorption and kinetic parameters of α-amylase onto Cu+2-PHEMA beads embedded column. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2018; 46:S538-S545. [DOI: 10.1080/21691401.2018.1501378] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Ömür Acet
- Faculty of Arts and Science, Chemistry Department, Aksaray University, Aksaray, Turkey
| | - Neşe Hayat Aksoy
- Faculty of Veterinary Medicine, Aksaray University, Aksaray, Turkey
| | - Demet Erdönmez
- Faculty of Arts and Science, Biology Department, Aksaray University, Aksaray, Turkey
| | - Mehmet Odabaşı
- Faculty of Arts and Science, Chemistry Department, Aksaray University, Aksaray, Turkey
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Reversible adsorption of catalase onto Fe3+ chelated poly(AAm-GMA)-IDA cryogels. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 50:379-85. [DOI: 10.1016/j.msec.2015.02.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 01/14/2015] [Accepted: 02/21/2015] [Indexed: 11/19/2022]
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García PF, Freiherr von Roman M, Reinlein S, Wolf M, Berensmeier S. Impact of nanoparticle aggregation on protein recovery through a pentadentate chelate ligand on magnetic carriers. ACS APPLIED MATERIALS & INTERFACES 2014; 6:13607-16. [PMID: 25090244 DOI: 10.1021/am503082s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The growing need for more efficient separation techniques still dominates downstream processing of biomolecules, thus encouraging the continuous development of advanced nanomaterials. In this paper we present an improved process for recovering recombinant histidine tagged green fluorescent protein from an E. coli cell lysate. Superparamagnetic core-shell nanocarriers are functionalized with a pentadentate chelate affinity ligand and then loaded with metal ions (Cu(2+), Ni(2+), or Zn(2+)). The separation process yields high binding capacity (250 mg/g), good selectivity, purity >98%, good recyclability with 90% capacity after 9 cycles, and long-term stability. We determined the main physical properties of the magnetite-based nanoparticles such as saturation magnetization (59 A m(2)/kg), primary particle diameter (22 ± 4 nm), and specific surface area (89 m(2)/g). Our results show that this material is a promising tool for bioseparation applications. One special focus of the work includes analyzing the changes in the hydrodynamic size distribution using dynamic light scattering and transmission electron microscopy. We relate these effects to different interaction levels in the system and discuss how the stronger aggregation of the magnetite core is the main limiting factor for the separation yield, leading to a considerable decrease in the number of metal ions available for biomolecular capture. Otherwise weaker interactions lead instead to agglomeration effects that have no impact on the binding capacity of the system. The simple relation between the size of the aggregated units and the size of the primary particles corresponds approximately to the relation between the number of existing binding sites and the actual protein binding in the separation process. Compared with that, the effect of steric hindrance among proteins is of less significance.
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Affiliation(s)
- P Fraga García
- Bioseparation Engineering Group, Mechanical Engineering Faculty, Technische Universität München , Boltzmannstrasse 15, D-85748 Garching, Germany
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Cömert ŞC, Odabaşı M. Investigation of lysozyme adsorption performance of Cu2+-attached PHEMA beads embedded cryogel membranes. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 34:1-8. [DOI: 10.1016/j.msec.2013.09.033] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 08/26/2013] [Accepted: 09/08/2013] [Indexed: 11/29/2022]
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7
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Akduman B, Uygun M, Uygun DA, Akgöl S, Denizli A. Purification of yeast alcohol dehydrogenase by using immobilized metal affinity cryogels. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4842-8. [DOI: 10.1016/j.msec.2013.08.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/19/2013] [Accepted: 08/05/2013] [Indexed: 11/26/2022]
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8
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Uygun M, Akduman B, Akgöl S, Denizli A. A New Metal-Chelated Cryogel for Reversible Immobilization of Urease. Appl Biochem Biotechnol 2013; 170:1815-26. [DOI: 10.1007/s12010-013-0316-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 05/27/2013] [Indexed: 10/26/2022]
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Ceylan Ş, Odabaşı M. Novel adsorbent for DNA adsorption: Fe3+-attached sporopollenin particles embedded composite cryogels. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2013; 41:376-83. [DOI: 10.3109/21691401.2012.759125] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Baydemir G, Odabaşı M. Microsphere-embedded cryogel for selective and efficient depletion of immunoglobulin G from human serum. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2013; 41:319-26. [DOI: 10.3109/21691401.2012.743904] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Altintaş EB, Yavuz H, Say R, Denizli A. Methacryloylamidoglutamic acid having porous magnetic beads as a stationary phase in metal chelate affinity chromatography. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 17:213-26. [PMID: 16411610 DOI: 10.1163/156856206774879045] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We have prepared a novel magnetic metal-chelate adsorbent utilizing methacryloylamidoglutamic acid (MAGA) as a metal-chelating ligand. MAGA was synthesized by using methacryloyl chloride and L-glutamic acid dihydrochloride. Magnetic beads with an average diameter of 50-100 microm were produced by suspension polymerization of 2-hydroxyethyl methacrylate (HEMA) and MAGA in the presence of Fe3O4 particles carried out in an aqueous dispersion medium. Magnetic beads were charged with the Cu2+ ions directly via MAGA for the adsorption of cytochrome c (cyt c) from aqueous solutions. The maximum cyt c adsorption capacity of the Cu2+-chelated beads (0.86 mmol/g Cu2+ loading) was found to be 37 mg/g at pH 8.0 in phosphate buffer. Cyt c adsorption on the poly(HEMA-MAGA) beads was 15.4 mg/g. Cu2+ charging increased the cyt c adsorption significantly (37 mg/g). Cyt c adsorption decreased with increasing temperature. Cyt c molecules could be adsorbed and desorbed five times with these adsorbents without noticeable loss in their cyt c adsorption capacity. The resulting magnetic chelator beads posses excellent long term storage stability.
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Affiliation(s)
- Evrim Banu Altintaş
- Department of Chemistry, Biochemistry Division, Hacettepe University, Ankara, Turkey
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Uzun L, Sağlam N, Safarikova M, Safarik I, Denizli A. Copper Biosorption on Magnetically Modified Yeast Cells Under Magnetic Field. SEP SCI TECHNOL 2011. [DOI: 10.1080/01496395.2010.541400] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Kılıçay E, Çakmaklı B, Hazer B, Denkbaş EB, Açıkgöz B. Acetylsalicylic acid loading and release studies of the PMMA-g-polymeric oils/oily acids micro and nanospheres. J Appl Polym Sci 2010. [DOI: 10.1002/app.32825] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Shi W, Cao H, Shen Y, Song C, Li D, Zhang Y, Ge D. Chemically Modified PPyCOOH Microtubes as an Affinity Matrix for Protein Purification. MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200900186] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Guo N, Wu D, Pan X, Lu M. Magnetic polymer microspheres with azidocarbonyl groups: Synthesis, characterization and application in protein immobilization. J Appl Polym Sci 2009. [DOI: 10.1002/app.29755] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Akkaya B, Uzun L, Altintaş EB, Candan F, Denizli A. Concanavalin a Immobilized Monosize and Magnetic Poly(glycidyl Methacrylate) Beads for Use in Yeast Invertase Adsorption. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2009. [DOI: 10.1080/10601320802637086] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ma Z, Liu H. Synthesis and surface modification of magnetic particles for application in biotechnology and biomedicine. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.cpart.2006.11.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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An overview of separation by magnetically stabilized beds: State-of-the-art and potential applications. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.cpart.2007.01.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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N-methacryloyl-(l)-histidine methyl ester carrying porous magnetic beads for metal chelate adsorption of cytochrome c. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2007. [DOI: 10.1016/j.msec.2006.04.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Poly(acrylamide-allyl glycidyl ether) cryogel as a novel stationary phase in dye-affinity chromatography. J Appl Polym Sci 2007. [DOI: 10.1002/app.26187] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Akgöl S, Özkara S, Uzun L, Yılmaz F, Denizli A. Pseudospecific magnetic affinity beads for immunoglobulin-G depletion from human serum. J Appl Polym Sci 2007. [DOI: 10.1002/app.26771] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Najam-ul-Haq M, Rainer M, Schwarzenauer T, Huck C, Bonn G. Chemically modified carbon nanotubes as material enhanced laser desorption ionisation (MELDI) material in protein profiling. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.01.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Rainer M, Muhammad NUH, Huck CW, Feuerstein I, Bakry R, Huber LA, Gjerde DT, Zou X, Qian H, Du X, Wei-Gang F, Ke Y, Bonn GK. Ultra-fast mass fingerprinting by high-affinity capture of peptides and proteins on derivatized poly(glycidyl methacrylate/divinylbenzene) for the analysis of serum and cell lysates. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2006; 20:2954-60. [PMID: 16953521 DOI: 10.1002/rcm.2673] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The development of support materials in mass fingerprinting is an important task required for diagnostic markers in conjunction with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The material-based approach, which we introduced as material-enhanced laser desorption/ionization (MELDI), focuses not only on different functionalities, but also emphasizes the morphology, i.e. porosity or particle size of the carrier material. As a result, it provides a quick and sensitive platform for effective binding of peptides and proteins out of different biofluids, e.g. serum, spinal fluid, urine or cell lysates, and to subsequently analyze them with MALDI-TOF MS. This approach includes a built-in desalting step for serum protein profiling and is sensitive enough to detect proteins and peptides down to 100 fmol/microL. Here we co-polymerized glycidyl methacrylate (GMA) with divinylbenzene (DVB) using thermal polymerization to yield a GMA/DVB polymer for further modifications. Different affinities have been created, such as immobilized metal ion affinity (IDA-Cu2+), reversed-phase (RP) and anion-exchanger (AX) chromatography. The diverse derivatizations and the dispersity of the particles created by different chemical synthetic approaches were confirmed by characteristic infrared (IR) peaks. The polymerization carried out by non-stirring yielded an average pore radius of 6.1 microm (macro-pores) that enhanced the binding capacity enormously by offering enlarged surface areas. Moreover, atomic absorption spectrometry (AAS) provided the metal content loaded on iminodiacetic acid (IDA) in the case of poly(GMA/DVB)-IDA-Cu2+. To summarize, the optimized MELDI approach is sensitive in its performance, extremely fast and can be adapted to robotic systems for routine analysis, allowing sample preparation in less than 5 min in contrast to the conventional surface-enhanced laser desorption/ionization (SELDI) methods.
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Affiliation(s)
- Matthias Rainer
- Institute of Analytical Chemistry and Radiochemistry, Leopold-Franzens University, Innsbruck, Austria
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Abstract
This review summarizes the preparation and application of chromatographic separation media based on methacrylate monomers with a major focus on highly crosslinked macroporous beads prepared from 2-hydroxyethyl methacrylate and glycidyl methacrylate, respectively. The effects of process variables such as composition of the polymerization mixture that includes monomers, porogenic solvents, and free radical initiator, suspension stabilizer, reaction temperature, and stirring are detailed for both classical and templated suspension polymerization. In addition, specific features of the preparation of monodisperse beads are also discussed. The performance of methacrylate-based separation media is demonstrated on numerous separations in a variety of chromatographic modes.
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Affiliation(s)
- Milan J Benes
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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Ma ZY, Guan YP, Liu XQ, Liu HZ. Synthesis of magnetic chelator for high-capacity immobilized metal affinity adsorption of protein by cerium initiated graft polymerization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:6987-94. [PMID: 16008413 DOI: 10.1021/la050504g] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A novel magnetic chelator with high adsorption capacity of protein by immobilized metal affinity adsorption was prepared by cerium (IV) initiated graft polymerization of tentacle-type polymer chains with iminodiacetic acid (IDA) chelating group on magnetic particles with hydroxyl groups. The micron-sized magnetic poly(vinyl acetate-divinylbenzene) (PVAc-DVB) particles were prepared by a modified suspension polymerization in the presence of oleic acid-coated magnetite nanoparticles and subsequently modified by ester exchange reaction to introduce functional hydroxyl groups. Bovine hemoglobin (BHb) was selected as a model protein to investigate the adsorption capacity of these magnetic particles. The magnetic particles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), superconducting quantum interference device (SQUID) magnetometry, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), and X-ray diffraction (XRD). The results showed that the magnetic particles had an average size of 5 microm and superparamagnetism with saturation magnetization of 20.0 emu/g at room temperature. The protein adsorption indicated that the graft polymerization of tentacle type polymer chains on the magnetic particles could produce magnetic adsorbents with high adsorption capacity (1428.21 mg/g) and low nonspecific adsorption of protein. The magnetic particles with grafted tentacle polymer chains have potential application in large-scale affinity separation of proteins.
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Affiliation(s)
- Z Y Ma
- Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, P.O. Box 353, Beijing 100080, P. R. China
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Ma Z, Guan Y, Liu X, Liu H. Covalent immobilization of albumin on micron-sized magnetic poly(methyl methacrylate-divinylbenzene-glycidyl methacrylate) microspheres prepared by modified suspension polymerization. POLYM ADVAN TECHNOL 2005. [DOI: 10.1002/pat.618] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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