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Ma L, Zhang W, Hou M, Li D, Liu F, Du X, Jiang P, Wang Z, Zhang R, Cao H, Ye S, Li C. Analysis of sialic acid levels in Chinese intravenous immunoglobulins by high-performance liquid chromatography with fluorescence detection. Biomed Chromatogr 2018; 33:e4452. [PMID: 30513136 DOI: 10.1002/bmc.4452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 11/15/2018] [Accepted: 11/27/2018] [Indexed: 12/18/2022]
Abstract
Intravenous immunoglobulin (IVIg) is increasingly used for the treatment of autoimmune and systemic inflammatory diseases with both licensed and off-label indications. Recent studies indicated that IVIg-mediated immunomodulation and anti-inflammation are closely associated with the IgG sialylation, especially with IgG crystallizable fragment (Fc) sialylation. The sialic acid levels of the IgG molecules and Fc fragments in 12 IVIg preparations from six Chinese manufacturers were evaluated. The Fc fragments were derived from the papain digestion of IVIg, followed by affinity and size exclusion chromatography. The sialic acid levels in Fc fragments and IVIg preparations were determined by high-performance liquid chromatography with fluorescence detection, after the sialic acid residues were released from the proteins. The results showed that the sialic acid levels in Chinese IVIg preparations ranged from 0.875 (mol/mol IgG) to 1.085 (mol/mol IgG), and the sialic acid levels in Fc fragments were from 0.321 (mol/mol Fc) to 0.361 (mol/mol Fc). Furthermore, the sialic acid levels of IVIg preparations and Fc fragments from different Chinese manufactures were significantly different. These findings will contribute to an increased understanding of Chinese IVIg preparations and the relationship between the sialic acid levels in IVIg preparations and their clinical efficacy in future clinical studies.
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Affiliation(s)
- Li Ma
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Wei Zhang
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Mingxia Hou
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Dong Li
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Fengjuan Liu
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Xi Du
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Peng Jiang
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Zongkui Wang
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Rong Zhang
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Haijun Cao
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Shengliang Ye
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
| | - Changqing Li
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China
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Sugiyama S, Nomura Y, Sakamoto T, Kitatani T, Kobayashi A, Miyakawa S, Takahashi Y, Adachi H, Takano K, Murakami S, Inoue T, Mori Y, Nakamura Y, Matsumura H. Crystallization and preliminary X-ray diffraction studies of an RNA aptamer in complex with the human IgG Fc fragment. Acta Crystallogr Sect F Struct Biol Cryst Commun 2008; 64:942-4. [PMID: 18931441 PMCID: PMC2564881 DOI: 10.1107/s1744309108028236] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2008] [Accepted: 09/03/2008] [Indexed: 11/10/2022]
Abstract
Aptamers, which are folded DNA or RNA molecules, bind to target molecules with high affinity and specificity. An RNA aptamer specific for the Fc fragment of human immunoglobulin G (IgG) has recently been identified and it has been demonstrated that an optimized 24-nucleotide RNA aptamer binds to the Fc fragment of human IgG and not to other species. In order to clarify the structural basis of the high specificity of the RNA aptamer, it was crystallized in complex with the Fc fragment of human IgG1. Preliminary X-ray diffraction studies revealed that the crystals belonged to the orthorhombic space group P2(1)2(1)2, with unit-cell parameters a = 83.7, b = 107.2, c = 79.0 A. A data set has been collected to 2.2 A resolution.
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Affiliation(s)
- Shigeru Sugiyama
- Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- CREST JST, Suita, Osaka 565-0871, Japan
| | - Yusuke Nomura
- Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, Narashino-shi, Chiba 275-0016, Japan
- CREST JST, Minato-ku, Tokyo 108-8639, Japan
| | - Taiichi Sakamoto
- Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, Narashino-shi, Chiba 275-0016, Japan
- CREST JST, Minato-ku, Tokyo 108-8639, Japan
| | - Tomoya Kitatani
- Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- CREST JST, Suita, Osaka 565-0871, Japan
| | | | - Shin Miyakawa
- CREST JST, Minato-ku, Tokyo 108-8639, Japan
- Ribomic Inc., 3-16-13 Shirokanedai, Minato-ku, Tokyo 108-0071, Japan
| | - Yoshinori Takahashi
- Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- CREST JST, Suita, Osaka 565-0871, Japan
| | - Hiroaki Adachi
- Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- CREST JST, Suita, Osaka 565-0871, Japan
- SOSHO Inc., Osaka 541-0053, Japan
| | - Kazufumi Takano
- Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- CREST JST, Suita, Osaka 565-0871, Japan
- SOSHO Inc., Osaka 541-0053, Japan
| | - Satoshi Murakami
- CREST JST, Suita, Osaka 565-0871, Japan
- SOSHO Inc., Osaka 541-0053, Japan
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama 226-8501, Japan
| | - Tsuyoshi Inoue
- Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- CREST JST, Suita, Osaka 565-0871, Japan
- SOSHO Inc., Osaka 541-0053, Japan
| | - Yusuke Mori
- Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- CREST JST, Suita, Osaka 565-0871, Japan
- SOSHO Inc., Osaka 541-0053, Japan
| | - Yoshikazu Nakamura
- CREST JST, Minato-ku, Tokyo 108-8639, Japan
- Department of Basic Medical Sciences, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
| | - Hiroyoshi Matsumura
- Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- CREST JST, Suita, Osaka 565-0871, Japan
- SOSHO Inc., Osaka 541-0053, Japan
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Oganesyan V, Gao C, Shirinian L, Wu H, Dall’Acqua WF. Structural characterization of a human Fc fragment engineered for lack of effector functions. Acta Crystallogr D Biol Crystallogr 2008; 64:700-4. [PMID: 18560159 PMCID: PMC2467532 DOI: 10.1107/s0907444908007877] [Citation(s) in RCA: 133] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Accepted: 03/22/2008] [Indexed: 11/10/2022]
Abstract
The first three-dimensional structure of a human Fc fragment genetically engineered for the elimination of its ability to mediate antibody-dependent cell-mediated cytotoxicity and complement-dependent cytotoxicity is reported. When introduced into the lower hinge and CH2 domain of human IgG1 molecules, the triple mutation L234F/L235E/P331S ('TM') causes a profound decrease in their binding to human CD64, CD32A, CD16 and C1q. Enzymatically produced Fc/TM fragment was crystallized and its structure was solved at a resolution of 2.3 A using molecular replacement. This study revealed that the three-dimensional structure of Fc/TM is very similar to those of other human Fc fragments in the experimentally visible region spanning residues 236-445. Thus, the dramatic broad-ranging effects of TM on IgG binding to several effector molecules cannot be explained in terms of major structural rearrangements in this portion of the Fc.
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Affiliation(s)
- Vaheh Oganesyan
- Department of Antibody Discovery and Protein Engineering, MedImmune Inc., One MedImmune Way, Gaithersburg, MD 20878, USA
| | - Changshou Gao
- Department of Antibody Discovery and Protein Engineering, MedImmune Inc., One MedImmune Way, Gaithersburg, MD 20878, USA
| | - Lena Shirinian
- Department of Antibody Discovery and Protein Engineering, MedImmune Inc., One MedImmune Way, Gaithersburg, MD 20878, USA
| | - Herren Wu
- Department of Antibody Discovery and Protein Engineering, MedImmune Inc., One MedImmune Way, Gaithersburg, MD 20878, USA
| | - William F. Dall’Acqua
- Department of Antibody Discovery and Protein Engineering, MedImmune Inc., One MedImmune Way, Gaithersburg, MD 20878, USA
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