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Lin HJ, Xiao Joe JT, Lu WJ, Huang MY, Sun TH, Lin SP, Li YC, Tsui YC, Lu MW, Victor Lin HT. Secretory Production of Functional Grouper Type I Interferon from Epinephelus septemfasciatus in Escherichia coli and Bacillus subtilis. Int J Mol Sci 2020; 21:E1465. [PMID: 32098104 PMCID: PMC7073146 DOI: 10.3390/ijms21041465] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 11/16/2022] Open
Abstract
Nervous necrosis virus (NNV) results in high mortality rates of infected marine fish worldwide. Interferons (IFNs) are cytokines in vertebrates that suppress viral replication and regulate immune responses. Heterologous overexpression of fish IFN in bacteria could be problematic because of protein solubility and loss of function due to protein misfolding. In this study, a protein model of the IFN-α of Epinephelus septemfasciatus was built based on comparative modeling. In addition, PelB and SacB signal peptides were fused to the N-terminus of E. septemfasciatus IFN-α for overexpression of soluble, secreted IFN in Escherichia coli (E-IFN) and Bacillus subtilis (B-IFN). Cytotoxicity tests indicated that neither recombinant grouper IFN-α were cytotoxic to a grouper head kidney cell line (GK). The GK cells stimulated with E-IFN and B-IFN exhibited elevated expression of antiviral Mx genes when compared with the control group. The NNV challenge experiments demonstrated that GK cells pretreated or co-treated with E-IFN and B-IFN individually had three times the cell survival rates of untreated cells, indicating the cytoprotective ability of our recombinant IFNs. These data provide a protocol for the production of soluble, secreted, and functional grouper IFN of high purity, which may be applied to aquaculture fisheries for antiviral infection.
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Affiliation(s)
- Hsuan-Ju Lin
- Department of Food Science, National Taiwan Ocean University, Keelung 20224, Taiwan; (H.-J.L.); (W.-J.L.); (T.-H.S.); (S.-P.L.); (Y.-C.L.); (Y.-C.T.)
| | - Joan Tang Xiao Joe
- Doctoral Degree Program in Marine Biotechnology, The College of Life Sciences, National Taiwan Ocean University, Keelung 20224, Taiwan;
- Doctoral Degree Program in Marine Biotechnology, Academia Sinica, Taipei 11529, Taiwan
| | - Wen-Jung Lu
- Department of Food Science, National Taiwan Ocean University, Keelung 20224, Taiwan; (H.-J.L.); (W.-J.L.); (T.-H.S.); (S.-P.L.); (Y.-C.L.); (Y.-C.T.)
| | - Mei-Ying Huang
- Division of Aquaculture, Fisheries Research Institute, Council of Agriculture, No. 199, Hou-Ih Road, Keelung 20246, Taiwan;
| | - Ting-Hsuan Sun
- Department of Food Science, National Taiwan Ocean University, Keelung 20224, Taiwan; (H.-J.L.); (W.-J.L.); (T.-H.S.); (S.-P.L.); (Y.-C.L.); (Y.-C.T.)
| | - Sheng-Pao Lin
- Department of Food Science, National Taiwan Ocean University, Keelung 20224, Taiwan; (H.-J.L.); (W.-J.L.); (T.-H.S.); (S.-P.L.); (Y.-C.L.); (Y.-C.T.)
| | - Yi-Chuan Li
- Department of Food Science, National Taiwan Ocean University, Keelung 20224, Taiwan; (H.-J.L.); (W.-J.L.); (T.-H.S.); (S.-P.L.); (Y.-C.L.); (Y.-C.T.)
| | - Ya-Chin Tsui
- Department of Food Science, National Taiwan Ocean University, Keelung 20224, Taiwan; (H.-J.L.); (W.-J.L.); (T.-H.S.); (S.-P.L.); (Y.-C.L.); (Y.-C.T.)
| | - Ming-Wei Lu
- Department of Aquaculture, National Taiwan Ocean University, Keelung 20224, Taiwan
| | - Hong-Ting Victor Lin
- Department of Food Science, National Taiwan Ocean University, Keelung 20224, Taiwan; (H.-J.L.); (W.-J.L.); (T.-H.S.); (S.-P.L.); (Y.-C.L.); (Y.-C.T.)
- Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 20224, Taiwan
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Rapid sample-saving biophysical characterisation and long-term storage stability of liquid interferon alpha2a formulations: Is there a correlation? Int J Pharm 2019; 562:42-50. [DOI: 10.1016/j.ijpharm.2019.03.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/10/2019] [Accepted: 03/11/2019] [Indexed: 12/15/2022]
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3
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Moradi S, Hosseini E, Abdoli M, Khani S, Shahlaei M. Comparative molecular dynamic simulation study on the use of chitosan for temperature stabilization of interferon αII. Carbohydr Polym 2019; 203:52-59. [DOI: 10.1016/j.carbpol.2018.09.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 09/08/2018] [Accepted: 09/17/2018] [Indexed: 02/07/2023]
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Kaisersberger Vincek M, Mor A, Gorgieva S, Kokol V. Antibacterial activity and cytotoxycity of gelatine-conjugated lysine-based peptides. J Biomed Mater Res A 2017; 105:3110-3126. [PMID: 28771959 DOI: 10.1002/jbm.a.36164] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 06/30/2017] [Accepted: 07/28/2017] [Indexed: 12/21/2022]
Abstract
The effect of the coupling approach (chemical by using carbodiimide chemistry, and enzymatic by using transglutaminase) of a hydrophilic ɛ-poly-L-lysine (ɛPL) and a structurally-hydrophobic oligo-acyl-lysyl (OAK) to a gelatine (GEL) macromolecule, and their antibacterial activity against Gram-negative E. coli and Gram-positive S. aureus bacteria, as well as cytotoxicity to human osteoblast cells was studied as potential macromolecules for biomedical applications. Different spectroscopic (ultraviolet-visible, infrared, fluorescence, and electron paramagnetic resonance) and separation (size-exclusion chromatography and capillary zone electrophoresis) techniques, as well as zeta-potential analysis were performed to confirm the ɛPL/OAK covalent coupling and to determine their amount and orientation of the immobilization. The highest and kinetically the fastest reduction of bacteria (≥77% against E. coli vs. ≥82% against S. aureus) was achieved with GEL functionalized with ɛPL/OAK by the chemical grafting-to approach being correlated with conformationally the highly-flexible ˝brush-like˝ orientation linkage of peptides, enable its targeted and rapid interactions with bacteria membrane. The up to 400-fold lower yield of OAKs being immobilized may be related also to its cationic charge and hydrophobic alkyl chain moieties, compared to more hydrophilic ɛPL easily causing random polymerization and self-conjugation. The ɛPL/OAK-functionalized GEL did not induce citotoxicity to osteoblasts, even at ∼25-fold higher concentration than bacterial minimum inhibitory (MIC) concentration of ɛPL/OAK. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 3110-3126, 2017.
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Affiliation(s)
- Maja Kaisersberger Vincek
- Faculty of Mechanical Engineering, Institute of Engineering Materials and Design, University of Maribor, Maribor, Slovenia
| | - Amram Mor
- Department of Biotechnology & Food Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Selestina Gorgieva
- Faculty of Mechanical Engineering, Institute of Engineering Materials and Design, University of Maribor, Maribor, Slovenia
| | - Vanja Kokol
- Faculty of Mechanical Engineering, Institute of Engineering Materials and Design, University of Maribor, Maribor, Slovenia
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Salmannejad F, Nafissi-Varcheh N. Ectoine and hydroxyectoine inhibit thermal-induced aggregation and increase thermostability of recombinant human interferon Alfa2b. Eur J Pharm Sci 2017; 97:200-207. [DOI: 10.1016/j.ejps.2016.11.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 10/20/2016] [Accepted: 11/10/2016] [Indexed: 10/20/2022]
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6
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The impact of N-glycosylation on conformation and stability of immunoglobulin Y from egg yolk. Int J Biol Macromol 2016; 96:129-136. [PMID: 27988289 DOI: 10.1016/j.ijbiomac.2016.12.043] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/08/2016] [Accepted: 12/09/2016] [Indexed: 12/14/2022]
Abstract
Immunoglobulin Y (IgY) is a new therapeutic antibody, and its applications in industry are very broad. To provide insight into the effects of N-glycosylation on IgY, its conformation and stability were studied. In this research, IgY was extracted from egg yolk and then digested by peptide-N4-(N-acetyl-beta-glucosaminyl) asparagine-amidase. SDS-PAGE and infrared absorption spectrum showed that carbohydrates were distinctly reduced after enzymolysis. The circular dichroism spectrum indicated that the IgY molecule became more flexible and disordered after removal of N-glycan. The fluorescence intensity revealed that Trp residues were buried in a more hydrophobic environment after disposal of N-glycan. Storage stability decreased with the removal of oligosaccharide chains based on size-exclusion chromatography analysis. Deglycosylated IgY exhibited less resistance to guanidine hydrochloride-induced unfolding. After deglycosylation, IgY was more sensitive to pepsin. Therefore, N-glycosylation played an important role in the maintenance of the structure and stability of IgY.
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Maldaner FPS, Perobelli RF, Xavier B, Remuzzi GL, Walter ME, Dalmora SL. Evaluation of recombinant human parathyroid hormone by CZE method and its correlation with in vitro bioassay and LC methods. Talanta 2016; 162:567-573. [PMID: 27837872 DOI: 10.1016/j.talanta.2016.10.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 10/10/2016] [Accepted: 10/12/2016] [Indexed: 02/06/2023]
Abstract
A stability-indicating capillary zone electrophoresis (CZE) method was validated to assess the content/potency of the recombinant human parathyroid hormone (rhPTH 1-34), using ranitidine as internal standard (IS). A fused-silica capillary, (i.d. of 50µm; effective length of 40cm) was used at 25°C; the applied voltage was 20kV. The background electrolyte solution consisted of 50mmolL-1 sodium dihydrogen phosphate solution at pH 3.0. Injections were performed using a pressure mode at 50 mbar for 45s, with detection by photodiode array (PDA) detector set at 200nm. Separation was obtained with a migration time of 5.3min, and was linear over the concentration range of 0.25-250µgmL-1 (r2 =0.9992). Specificity and stability-indicating capability were established in degradation studies, which also showed that there was no interference of the excipients. The accuracy was 100.28% with bias lower than 0.85%. Analyses of the same batches showed mean differences of the estimated content/potencies of 0.61%, 1.31% higher and 0.86% lower as compared to the validated reversed-phase and size exclusion liquid chromatography methods, and to the UMR-106 cell culture bioassay, respectively, with non-significant differences (p>0.05). Degraded forms were also subjected to the in vitro cytotoxicity test. The results obtained showed the capabilities of each one of the methods, and constitute an alternative strategy to monitor stability, improve the quality control and ensure the batch-to-batch consistency of bulk and finished biotechnology-derived medicine.
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Affiliation(s)
| | - Rafaela Ferreira Perobelli
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Bruna Xavier
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Gabriel Lunardi Remuzzi
- Department of Industrial Pharmacy, Federal University of Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Maurício Elesbão Walter
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Sérgio Luiz Dalmora
- Department of Industrial Pharmacy, Federal University of Santa Maria, 97105-900 Santa Maria-RS, Brazil.
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Tamizi E, Jouyban A. Forced degradation studies of biopharmaceuticals: Selection of stress conditions. Eur J Pharm Biopharm 2015; 98:26-46. [PMID: 26542454 DOI: 10.1016/j.ejpb.2015.10.016] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 10/21/2015] [Accepted: 10/28/2015] [Indexed: 12/24/2022]
Abstract
Stability studies under stress conditions or forced degradation studies play an important role in different phases of development and production of biopharmaceuticals and biological products. These studies are mostly applicable to selection of suitable candidates and formulation developments, comparability studies, elucidation of possible degradation pathways and identification of degradation products, as well as, development of stability indicating methods. Despite the integral part of these studies in biopharmaceutical industry, there is no well-established protocol for the selection of stress conditions, timing of stress testing and required extent of degradation. Therefore, due to the present gap in the stability studies guidelines, it is the responsibility of researchers working in academia and biopharmaceutical industry to set up forced degradation experiments that could fulfill all the expectations from the stability studies of biopharmaceuticals under stress conditions. Concerning the importance of the function of desired stress conditions in forced degradation studies, the present review aims to provide a practical summary of the applicable stress conditions in forced degradation studies of biopharmaceuticals according to the papers published in a time period of 1992-2015 giving detailed information about the experimental conditions utilized to induce required stresses.
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Affiliation(s)
- Elnaz Tamizi
- Drug Applied Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolghasem Jouyban
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
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Dong J, Ying B, Huang S, Ma S, Long P, Tu X, Yang W, Wu Z, Chen W, Miao X. High-performance liquid chromatography combined with intrinsic fluorescence detection to analyse melittin in individual honeybee (Apis mellifera) venom sac. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 1002:139-43. [PMID: 26319802 DOI: 10.1016/j.jchromb.2015.08.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 08/11/2015] [Accepted: 08/12/2015] [Indexed: 10/23/2022]
Abstract
Melittin is the major toxin peptide in bee venom, which has diverse biological effects. In the present study, melittin was separated by reverse-phase high-performance liquid chromatography, and was then detected using intrinsic fluorescence signal of tryptophan residue. The accuracy, linearity, limit of quantitation (LOQ), intra-day and inter-day precision of the method were carefully validated in this study. Results indicate that the intrinsic fluorescence signal of melittin has linear range from 0.04μg/mL to 20μg/mL with LOQ of 0.04μg/mL. The recovery range of spiked samples is between 81.93% and 105.25%. The precision results are expressed as relative standard deviation (RSD), which is in the range of 2.1-7.4% for intra-day precision and 6.2-10.8% for inter-day precision. Because of the large linear dynamic range and the high sensitivity, intrinsic fluorescence detection (IFD) can be used for analyzing melittin contents in individual venom sac of honeybee (Apis mellifera). The detected contents of melittin in individual bee venom sac are 0.18±0.25μg for one-day old honeybees (n=30), and 114.98±43.51μg for 25-day old (n=30) honeybees, respectively. Results indicate that there is large bee-to-bee difference in melittin contents. The developed method can be useful for discovering the melittin related honeybee biology information, which might be covered in the complex samples.
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Affiliation(s)
- Jiangtao Dong
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China
| | - Bihua Ying
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China
| | - Shaokang Huang
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China
| | - Shuangqin Ma
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China
| | - Peng Long
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China
| | - Xijuan Tu
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China
| | - Wenchao Yang
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China
| | - Zhenhong Wu
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China
| | - Wenbin Chen
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China.
| | - Xiaoqing Miao
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China; State and Local Joint Engineering Laboratory of Natural Biotoxin, Fujian Agriculture and Forestry University, Fuzhou, China; Engineering Research Center of Bee Products Process and Application, Ministry of Education, China.
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10
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Fekete S, Beck A, Veuthey JL, Guillarme D. Theory and practice of size exclusion chromatography for the analysis of protein aggregates. J Pharm Biomed Anal 2014; 101:161-73. [DOI: 10.1016/j.jpba.2014.04.011] [Citation(s) in RCA: 180] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/03/2014] [Accepted: 04/08/2014] [Indexed: 12/27/2022]
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Improved detection of variants in recombinant human interferon alpha-2a products by reverse-phase high-performance liquid chromatography on a core–shell stationary phase. J Pharm Biomed Anal 2014; 88:123-9. [DOI: 10.1016/j.jpba.2013.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 08/06/2013] [Accepted: 08/08/2013] [Indexed: 12/28/2022]
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12
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Chaves AR, Costa Queiroz ME. In-tube solid-phase microextraction with molecularly imprinted polymer to determine interferon alpha 2a in plasma sample by high performance liquid chromatography. J Chromatogr A 2013; 1318:43-8. [DOI: 10.1016/j.chroma.2013.10.018] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Chaves AR, Queiroz MEC. Immunoaffinity in-tube solid phase microextraction coupled with liquid chromatography with fluorescence detection for determination of interferon α in plasma samples. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 928:37-43. [DOI: 10.1016/j.jchromb.2013.03.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Revised: 03/16/2013] [Accepted: 03/19/2013] [Indexed: 12/29/2022]
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14
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Hong P, Koza S, Bouvier ESP. Size-Exclusion Chromatography for the Analysis of Protein Biotherapeutics and their Aggregates. J LIQ CHROMATOGR R T 2012; 35:2923-2950. [PMID: 23378719 PMCID: PMC3556795 DOI: 10.1080/10826076.2012.743724] [Citation(s) in RCA: 314] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In recent years, the use and number of biotherapeutics has increased significantly. For these largely protein-based therapies, the quantitation of aggregates is of particular concern given their potential effect on efficacy and immunogenicity. This need has renewed interest in size-exclusion chromatography (SEC). In the following review we will outline the history and background of SEC for the analysis of proteins. We will also discuss the instrumentation for these analyses, including the use of different types of detectors. Method development for protein analysis by SEC will also be outlined, including the effect of mobile phase and column parameters (column length, pore size). We will also review some of the applications of this mode of separation that are of particular importance to protein biopharmaceutical development and highlight some considerations in their implementation.
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Mark JK, Dionne S, Cyr TD, Boucher S, Girard M, Hefford MA. Utility of standard pharmacopeial and nonpharmacopeial methods in distinguishing folded, unfolded, and process variant forms of interferon α-2. J Pharm Sci 2012; 101:3672-86. [DOI: 10.1002/jps.23276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 06/20/2012] [Accepted: 07/06/2012] [Indexed: 11/05/2022]
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16
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Stability-indicating capillary zone electrophoresis method for the assessment of recombinant human granulocyte-macrophage colony-stimulating factor and its correlation with reversed-phase liquid chromatography method and bioassay. Talanta 2012; 94:1-7. [DOI: 10.1016/j.talanta.2012.03.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 03/05/2012] [Accepted: 03/06/2012] [Indexed: 11/23/2022]
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17
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Xie Y, He H, Fan G, Wu Y. Determination of porcine fibrinogen in rat and dog plasma after intraperitoneal injection of a porcine-derived fibrin glue by fluorescein-labeled assay method: Comparison with isotope-labeled assay method. J Pharm Biomed Anal 2011; 57:7-12. [PMID: 21959350 DOI: 10.1016/j.jpba.2011.08.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 08/25/2011] [Accepted: 08/25/2011] [Indexed: 11/28/2022]
Abstract
A sensitive and specific fluorescein isothiocyanate (FITC) label coupled with size-exclusion high-performance liquid chromatography-fluorescence detection (SE-HPLC-FLD) method was developed and validated for the estimation of the pharmacokinetic profiles of porcine fibrinogen after intraperitoneal injection of a porcine-derived fibrin glue (FG) to SD rats and beagle dogs with three single doses. Porcine fibrinogen, the major composition of the FG, was labeled with FITC. The FG containing FITC-labeled porcine fibrinogen was intraperitoneally administered to SD rats at three single dosages (100, 200, 400mg/kg of porcine fibrinogen), and the collected plasma was then detected by SE-HPLC-FLD method. The present technique was compared to the previously introduced isotope-labeled assay method for the pharmacokinetic studies in SD rats. The pharmacokinetic studies in SD rats showed that the correlation coefficient between the FITC-labeled assay and (125)I-labeled assay methods was r(2)=0.989. Thus, this FITC-labeled assay method performed well and demonstrated high concordance with the previous (125)I-labeled assay method, suggesting that FITC-labeled assay could substitute the (125)I-labeled assay as a method of choice for quantification in beagle dogs. Then the plasma levels of porcine fibrinogen in beagle dogs were studied by the FITC-labeled assay method with three single doses (15, 30, 60mg/kg of porcine fibrinogen). The method validation showed that the FITC label coupled with SE-HPLC-FLD method was suitable for the quantification of porcine fibrinogen in plasma samples with satisfactory linear (r(2)>0.999), precision (<12%), accuracy (95.5-104.9%) and recovery (>88%). The results showed linear disposition of porcine fibrinogen at the examined dosage range in SD rats or beagle dogs.
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Affiliation(s)
- Ying Xie
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, No. 325 Guohe Road, Shanghai 200433, PR China
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Granulocyte-macrophage colony stimulating factor: Evaluation of biopharmaceutical formulations by stability-indicating RP-LC method and bioassay. Biologicals 2011; 39:211-6. [DOI: 10.1016/j.biologicals.2011.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Revised: 05/09/2011] [Accepted: 05/12/2011] [Indexed: 01/01/2023] Open
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19
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Bioactivity determination of native and variant forms of therapeutic interferons. J Biomed Biotechnol 2011; 2011:174615. [PMID: 21403871 PMCID: PMC3051158 DOI: 10.1155/2011/174615] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Accepted: 01/14/2011] [Indexed: 12/25/2022] Open
Abstract
The traditional antiviral assays for the determination of interferon potency are reported to have considerable variability between and within assays. Although several reporter gene assays based on interferon-inducible promoter activities have been reported, data from comprehensive validation studies are lacking and few studies have been conducted to analyze the variant forms of interferons, which could have undesirable clinical implications. Here, a reporter gene assay employing a HEK293 cell line stably transfected with luciferase gene under the control of interferon-stimulated response element promoter was developed and validated. The assay was found to be more sensitive, with a larger detection range than the antiviral assay. Several cytokines tested did not interfere with the test, suggesting the assay possesses a certain degree of selectivity. Moreover, the robustness of the assay was demonstrated by minimal variations in the results generated by different analysts and cell passage number (up to 52 passages). Finally, the method was employed to analyze several interferon variants (interferon-α 2a) and we found that the aggregated form has completely lost its potency; while a modest loss of bioactivity in oxidized interferon was observed (approx. 23%), the deamidated form essentially retained its activity.
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