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Chaaya N, Shahsavarian MA, Maffucci I, Friboulet A, Offmann B, Léger JB, Rousseau S, Avalle B, Padiolleau-Lefèvre S. Genetic background and immunological status influence B cell repertoire diversity in mice. Sci Rep 2019; 9:14261. [PMID: 31582818 PMCID: PMC6776527 DOI: 10.1038/s41598-019-50714-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 09/16/2019] [Indexed: 01/08/2023] Open
Abstract
The relationship between the immune repertoire and the physiopathological status of individuals is essential to apprehend the genesis and the evolution of numerous pathologies. Nevertheless, the methodological approaches to understand these complex interactions are challenging. We performed a study evaluating the diversity harbored by different immune repertoires as a function of their physiopathological status. In this study, we base our analysis on a murine scFv library previously described and representing four different immune repertoires: i) healthy and naïve, ii) healthy and immunized, iii) autoimmune prone and naïve, and iv) autoimmune prone and immunized. This library, 2.6 × 109 in size, is submitted to high throughput sequencing (Next Generation Sequencing, NGS) in order to analyze the gene subgroups encoding for immunoglobulins. A comparative study of the distribution of immunoglobulin gene subgroups present in the four libraries has revealed shifts in the B cell repertoire originating from differences in genetic background and immunological status of mice.
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Affiliation(s)
- Nancy Chaaya
- CNRS UMR 7025, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
- Sorbonne Universités, Université de Technologie de Compiègne, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
| | - Melody A Shahsavarian
- CNRS UMR 7025, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
- Sorbonne Universités, Université de Technologie de Compiègne, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
| | - Irene Maffucci
- CNRS UMR 7025, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
- Sorbonne Universités, Université de Technologie de Compiègne, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
| | - Alain Friboulet
- CNRS UMR 7025, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
- Sorbonne Universités, Université de Technologie de Compiègne, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
| | - Bernard Offmann
- Université de Nantes, Unité Fonctionnalité et Ingénierie des Protéines (UFIP), UMR 6286 CNRS, UFR Sciences et Techniques, 2, chemin de la Houssinière, 44322, Nantes, France
| | - Jean-Benoist Léger
- CNRS UMR 7253, Heudiasyc; Université de Technologie de Compiègne. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
- Sorbonne Universités, Université de Technologie de Compiègne, Heudiasyc. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
| | - Sylvain Rousseau
- CNRS UMR 7253, Heudiasyc; Université de Technologie de Compiègne. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
- Sorbonne Universités, Université de Technologie de Compiègne, Heudiasyc. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
| | - Bérangère Avalle
- CNRS UMR 7025, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
- Sorbonne Universités, Université de Technologie de Compiègne, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France
| | - Séverine Padiolleau-Lefèvre
- CNRS UMR 7025, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France.
- Sorbonne Universités, Université de Technologie de Compiègne, Génie Enzymatique et Cellulaire. Centre de Recherche de Royallieu. CS 60319, 60203, Compiègne Cedex, France.
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Wang X, Xia Y. Anti-double Stranded DNA Antibodies: Origin, Pathogenicity, and Targeted Therapies. Front Immunol 2019; 10:1667. [PMID: 31379858 PMCID: PMC6650533 DOI: 10.3389/fimmu.2019.01667] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 07/03/2019] [Indexed: 01/02/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is characterized by high-titer serological autoantibodies, including antibodies that bind to double-stranded DNA (dsDNA). The origin, specificity, and pathogenicity of anti-dsDNA antibodies have been studied from a wider perspective. These autoantibodies have been suggested to contribute to multiple end-organ injuries, especially to lupus nephritis, in patients with SLE. Moreover, serum levels of anti-DNA antibodies fluctuate with disease activity in patients with SLE. By directly binding to self-antigens or indirectly forming immune complexes, anti-dsDNA antibodies can accumulate in the glomerular and tubular basement membrane. These autoantibodies can also trigger the complement cascade, penetrate into living cells, modulate gene expression, and even induce profibrotic phenotypes of renal cells. In addition, the expression of suppressor of cytokine signaling 1 is reduced by anti-DNA antibodies simultaneously with upregulation of profibrotic genes. Anti-dsDNA antibodies may even participate in the pathogenesis of SLE by catalyzing hydrolysis of certain DNA molecules or peptides in cells. Recently, anti-dsDNA antibodies have been explored in greater depth as a therapeutic target in the management of SLE. A substantial amount of data indicates that blockade of pathogenic anti-dsDNA antibodies can prevent or even reverse organ damage in murine models of SLE. This review focuses on the recent research advances regarding the origin, specificity, classification, and pathogenicity of anti-dsDNA antibodies and highlights the emerging therapies associated with them.
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Affiliation(s)
- Xiaoyu Wang
- Department of Dermatology, The Second Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Yumin Xia
- Department of Dermatology, The Second Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, China
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Nevzorova TA, Zhao Q, Lomakin YA, Ponomareva AA, Mukhitov AR, Purohit PK, Weisel JW, Litvinov RI. Single-Molecule Interactions of a Monoclonal Anti-DNA Antibody with DNA. BIONANOSCIENCE 2017; 7:132-147. [PMID: 29104846 DOI: 10.1007/s12668-016-0303-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Interactions of DNA with proteins are essential for key biological processes and have both a fundamental and practical significance. In particular, DNA binding to anti-DNA antibodies is a pathogenic mechanism in autoimmune pathology, such as systemic lupus erythematosus. Here we measured at the single-molecule level binding and forced unbinding of surface-attached DNA and a monoclonal anti-DNA antibody MRL4 from a lupus erythematosus mouse. In optical trap-based force spectroscopy, a microscopic antibodycoated latex bead is trapped by a focused laser beam and repeatedly brought into contact with a DNA-coated surface. After careful discrimination of non-specific interactions, we showed that the DNA-antibody rupture force spectra had two regimes, reflecting formation of weaker (20-40 pN) and stronger (>40 pN) immune complexes that implies the existence of at least two bound states with different mechanical stability. The two-dimensional force-free off-rate for the DNA-antibody complexes was ~2.2 × 10-3 s-1, the transition state distance was ~0.94 nm, the apparent on-rate was ~5.26 s-1, and the stiffness of the DNA-antibody complex was characterized by a spring constant of 0.0021 pN/nm, suggesting that the DNA-antibody complex is a relatively stable, but soft and deformable macromolecular structure. The stretching elasticity of the DNA molecules was characteristic of single-stranded DNA, suggesting preferential binding of the MRL4 antibody to one strand of DNA. Collectively, the results provide fundamental characteristics of formation and forced dissociation of DNA-antibody complexes that help to understand principles of DNA-protein interactions and shed light on the molecular basis of autoimmune diseases accompanied by formation of anti-DNA antibodies.
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Affiliation(s)
- Tatiana A Nevzorova
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, 421 Curie Boulevard, Philadelphia, PA 19104, USA.,Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St, Kazan 420008, Russian Federation
| | - Qingze Zhao
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania School of Engineering and Applied Science, 220 S. 33rd Street, Philadelphia, PA 19104, USA
| | - Yakov A Lomakin
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, 16/10 Mikluho-Maklaya St, Moscow 117997, Russian Federation
| | - Anastasia A Ponomareva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St, Kazan 420008, Russian Federation.,Kazan Institute of Biochemistry and Biophysics, Russian Academy of Sciences, 2/31 Lobachevsky str, Kazan 420111, Russian Federation
| | - Alexander R Mukhitov
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, 421 Curie Boulevard, Philadelphia, PA 19104, USA
| | - Prashant K Purohit
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania School of Engineering and Applied Science, 220 S. 33rd Street, Philadelphia, PA 19104, USA
| | - John W Weisel
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, 421 Curie Boulevard, Philadelphia, PA 19104, USA
| | - Rustem I Litvinov
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, 421 Curie Boulevard, Philadelphia, PA 19104, USA.,Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St, Kazan 420008, Russian Federation
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Akberova NI, Zhmurov AA, Nevzorova TA, Litvinov RI. An anti-DNA antibody prefers damaged dsDNA over native. J Biomol Struct Dyn 2016; 35:219-232. [PMID: 26646388 DOI: 10.1080/07391102.2015.1128979] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
DNA-protein interactions, including DNA-antibody complexes, have both fundamental and practical significance. In particular, antibodies against double-stranded DNA play an important role in the pathogenesis of autoimmune diseases. Elucidation of structural mechanisms of an antigen recognition and interaction of anti-DNA antibodies provides a basis for understanding the role of DNA-containing immune complexes in human pathologies and for new treatments. Here we used Molecular Dynamic simulations of bimolecular complexes of a segment of dsDNA with a monoclonal anti-DNA antibody's Fab-fragment to obtain detailed structural and physical characteristics of the dynamic intermolecular interactions. Using a computationally modified crystal structure of a Fab-DNA complex (PDB: 3VW3), we studied in silico equilibrium Molecular Dynamics of the Fab-fragment associated with two homologous dsDNA fragments, containing or not containing dimerized thymine, a product of DNA photodamage. The Fab-fragment interactions with the thymine dimer-containing DNA was thermodynamically more stable than with the native DNA. The amino acid residues constituting a paratope and the complementary nucleotide epitopes for both Fab-DNA constructs were identified. Stacking and electrostatic interactions were shown to play the main role in the antibody-dsDNA contacts, while hydrogen bonds were less significant. The aggregate of data show that the chemically modified dsDNA (containing a covalent thymine dimer) has a higher affinity toward the antibody and forms a stronger immune complex. These findings provide a mechanistic insight into formation and properties of the pathogenic anti-DNA antibodies in autoimmune diseases, such as systemic lupus erythematosus, associated with skin photosensibilization and DNA photodamage.
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Affiliation(s)
- N I Akberova
- a Department of Biochemistry and Biotechnology, Institute of Fundamental Medicine and Biology , Kazan Federal University , 18 Kremlyovskaya St., Kazan 420111 , Russian Federation
| | - A A Zhmurov
- b Moscow Institute of Physics & Technology , 9 Institutskiy Per., Dolgoprudny, Moscow Region 141700 , Russian Federation
| | - T A Nevzorova
- a Department of Biochemistry and Biotechnology, Institute of Fundamental Medicine and Biology , Kazan Federal University , 18 Kremlyovskaya St., Kazan 420111 , Russian Federation
| | - R I Litvinov
- c Department of Cell and Developmental Biology , University of Pennsylvania Perelman School of Medicine , 1109 BRB II/III, 421 Curie Blvd., Philadelphia , PA 19104-6058 , USA
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Xia Y, Eryilmaz E, Zhang Q, Cowburn D, Putterman C. Anti-DNA antibody mediated catalysis is isotype dependent. Mol Immunol 2015; 69:33-43. [PMID: 26655427 DOI: 10.1016/j.molimm.2015.11.001] [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: 08/19/2015] [Revised: 10/29/2015] [Accepted: 11/01/2015] [Indexed: 12/27/2022]
Abstract
Anti-DNA antibodies are the serological hallmark of systemic lupus erythematosus, and participate in the pathogenesis of lupus nephritis by cross-reacting with multiple renal antigens. Previously, using a panel of murine anti-DNA IgGs that share identical variable regions but that differ in the constant regions, we demonstrated that the cross-reaction and renal pathogenicity of anti-DNA antibodies are isotype dependent. In this study, we investigated the catalytic potential of this anti-DNA antibody panel, and determined its isotype dependency. The three isotype switch variants (IgG1, IgG2a, IgG2b) and the parent IgG3 PL9-11 anti-DNA antibodies were compared in their catalysis of 500 base pair linear double stranded DNA and a 12-mer peptide (ALWPPNLHAWVP), by gel analysis, MALDI-TOF mass spectrometry, and nuclear magnetic resonance spectroscopy. The binding affinity of anti-DNA antibodies to double stranded DNA and peptide antigens were assessed by ELISA and surface plasmon resonance. We found that the PL9-11 antibody isotypes vary significantly in their potential to catalyze the cleavage of both linear and double stranded DNA and the proteolysis of peptides. The degree of the cleavage and proteolysis increases with the incubation temperature and time. While different PL9-11 isotypes have the same initial attack sites within the ALWPPNLHAWVP peptide, there was no correlation between binding affinity to the peptide and proteolysis rates. In conclusion, the catalytic properties of anti-DNA antibodies are isotype dependent. This finding provides further evidence that antibodies that share the same variable region, but which have different constant regions, are functionally distinct. The catalytic effects modulated by antibody constant regions need to be considered in the design of therapeutic antibodies (abzymes) and peptides designed to block pathogenic autoantibodies.
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Affiliation(s)
- Yumin Xia
- Department of Microbiology & Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Division of Rheumatology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
| | - Ertan Eryilmaz
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
| | - Qiuting Zhang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, Zhejiang 310058, China.
| | - David Cowburn
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
| | - Chaim Putterman
- Department of Microbiology & Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Division of Rheumatology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
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Hifumi E, Arakawa M, Matsumoto S, Yamamoto T, Katayama Y, Uda T. Biochemical features and antiviral activity of a monomeric catalytic antibody light-chain 23D4 against influenza A virus. FASEB J 2015; 29:2347-58. [PMID: 25713031 DOI: 10.1096/fj.14-264275] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Accepted: 01/26/2015] [Indexed: 02/02/2023]
Abstract
Catalytic antibodies have exhibited interesting functions against some infectious viruses such as HIV, rabies virus, and influenza virus in vitro as well as in vivo. In some cases, a catalytic antibody light chain takes on several structures from the standpoint of molecular size (monomer, dimer, etc.) and/or isoelectronic point. In this study, we prepared a monomeric 23D4 light chain by mutating the C-terminal Cys to Ala of the wild-type. The mutated 23D4 molecule took a simple monomeric form, which could hydrolyze synthetic 4-methyl-coumaryl-7-amide substrates and a plasmid DNA. Because the monomeric 23D4 light chain suppressed the infection of influenza virus A/Hiroshima/37/2001 in an in vitro assay, the corresponding experiments were conducted in vivo, after the virus strain (which was taken from a human patient) was successfully adapted into BALB/cN Sea mice. In the experiments, a mixture of the monomeric 23D4 and the virus was nasally administered 1) with preincubation and 2) without preincubation. As a result, the monomeric 23D4 clearly exhibited the ability to suppress the influenza virus infection in both cases, indicating a potential drug for preventing infection of the influenza A virus.
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Affiliation(s)
- Emi Hifumi
- *Research Promotion Institute, Oita University, Oita-shi, Oita, Japan; Japan Science and Technology Agency-Core Research for Evolutional Science and Technology, Kawaguchi, Saitama, Japan; Faculty of Medicine, Oita University, Yufu-city, Oita, Japan; Department of Applied Chemistry; Oita University, Oita-shi, Oita, Japan; Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan; and Institute of Systems, Information Technologies and Nanotechnologies, Nanotechnology Laboratory, Fukuoka, Japan
| | - Mitsue Arakawa
- *Research Promotion Institute, Oita University, Oita-shi, Oita, Japan; Japan Science and Technology Agency-Core Research for Evolutional Science and Technology, Kawaguchi, Saitama, Japan; Faculty of Medicine, Oita University, Yufu-city, Oita, Japan; Department of Applied Chemistry; Oita University, Oita-shi, Oita, Japan; Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan; and Institute of Systems, Information Technologies and Nanotechnologies, Nanotechnology Laboratory, Fukuoka, Japan
| | - Shingo Matsumoto
- *Research Promotion Institute, Oita University, Oita-shi, Oita, Japan; Japan Science and Technology Agency-Core Research for Evolutional Science and Technology, Kawaguchi, Saitama, Japan; Faculty of Medicine, Oita University, Yufu-city, Oita, Japan; Department of Applied Chemistry; Oita University, Oita-shi, Oita, Japan; Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan; and Institute of Systems, Information Technologies and Nanotechnologies, Nanotechnology Laboratory, Fukuoka, Japan
| | - Tatsuhiro Yamamoto
- *Research Promotion Institute, Oita University, Oita-shi, Oita, Japan; Japan Science and Technology Agency-Core Research for Evolutional Science and Technology, Kawaguchi, Saitama, Japan; Faculty of Medicine, Oita University, Yufu-city, Oita, Japan; Department of Applied Chemistry; Oita University, Oita-shi, Oita, Japan; Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan; and Institute of Systems, Information Technologies and Nanotechnologies, Nanotechnology Laboratory, Fukuoka, Japan
| | - Yoshiki Katayama
- *Research Promotion Institute, Oita University, Oita-shi, Oita, Japan; Japan Science and Technology Agency-Core Research for Evolutional Science and Technology, Kawaguchi, Saitama, Japan; Faculty of Medicine, Oita University, Yufu-city, Oita, Japan; Department of Applied Chemistry; Oita University, Oita-shi, Oita, Japan; Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan; and Institute of Systems, Information Technologies and Nanotechnologies, Nanotechnology Laboratory, Fukuoka, Japan
| | - Taizo Uda
- *Research Promotion Institute, Oita University, Oita-shi, Oita, Japan; Japan Science and Technology Agency-Core Research for Evolutional Science and Technology, Kawaguchi, Saitama, Japan; Faculty of Medicine, Oita University, Yufu-city, Oita, Japan; Department of Applied Chemistry; Oita University, Oita-shi, Oita, Japan; Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan; and Institute of Systems, Information Technologies and Nanotechnologies, Nanotechnology Laboratory, Fukuoka, Japan
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Kostrikina IA, Odintsova ES, Buneva VN, Nevinsky GA. Systemic lupus erythematosus: molecular cloning and analysis of recombinant DNase monoclonal κ light chain NGK-1. Int Immunol 2014; 26:439-50. [PMID: 24919596 DOI: 10.1093/intimm/dxu047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Because DNase antibodies are cytotoxic, enter the nucleus and cause DNA fragmentation inducing cell death by apoptosis, they can play an important role in the pathogenesis of different autoimmune pathologies and especially systemic lupus erythematosus (SLE). The interesting goal of catalytic antibodies research is not only to study a possible biological role of such antibodies, but also to develop in future new human and animal therapies that use the advantages offered by abzymes. An immunoglobulin κ light chain library from SLE patients was cloned into a phagemid vector. Phage particles displaying recombinant monoclonal antibody light chains (MLChs) capable of binding DNA were isolated by affinity chromatography on DNA-cellulose. Sixteen of the 46 MLChs efficiently hydrolyzed DNA; one MLCh (approximately 27-28kDa) was expressed in Escherichia coli and purified by metal chelating and gel filtration. MLCh NGK-1 was electrophoretically homogeneous and demonstrated a positive answer with mouse IgGs against light chains of human antibodies after western blotting. SDS-PAGE in a gel containing DNA demonstrated that the MLCh hydrolyzes DNA and is not contaminated by canonical DNases. The DNase MLCh was activated by several metal ions. The protein sequence of the DNase MLCh has homology with mammalian DNases I and shares with them several identical or similar (with the same side chain functionality) important amino acid residues, which are necessary for DNA hydrolysis and binding of Mg(2+) and Ca(2+) ions. The affinity of DNA for this first example of a MLCh (K(M) = 0.3 microM) was 150- to 200-fold higher than for human DNase I.
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Affiliation(s)
- Irina A Kostrikina
- Institute of Chemical Biology and Fundamental Medicine, Siberian Division of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Elena S Odintsova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Division of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Valentina N Buneva
- Institute of Chemical Biology and Fundamental Medicine, Siberian Division of Russian Academy of Sciences, Novosibirsk 630090, Russia Novosibirsk State University, Novosibirsk 630090, Russia
| | - Georgy A Nevinsky
- Institute of Chemical Biology and Fundamental Medicine, Siberian Division of Russian Academy of Sciences, Novosibirsk 630090, Russia Novosibirsk State University, Novosibirsk 630090, Russia
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Hifumi E, Fujimoto N, Arakawa M, Saito E, Matsumoto S, Kobayashi N, Uda T. Biochemical features of a catalytic antibody light chain, 22F6, prepared from human lymphocytes. J Biol Chem 2013; 288:19558-68. [PMID: 23677996 PMCID: PMC3707657 DOI: 10.1074/jbc.m113.454579] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Human antibody light chains belonging to subgroup II of germ line genes were amplified by a seminested PCR technique using B-lymphocytes taken from a human adult infected with influenza virus. Each gene of the human light chains was transferred into the Escherichia coli system. The recovered light chain was highly purified using a two-step purification system. Light chain 22F6 showed interesting catalytic features. The light chain cleaved a peptide bond of synthetic peptidyl-4-methyl-coumaryl-7-amide (MCA) substrates, such as QAR-MCA and EAR-MCA, indicating amidase activity. It also hydrolyzed a phosphodiester bond of both DNA and RNA. From the analysis of amino acid sequences and molecular modeling, the 22F6 light chain possesses two kinds of active sites as amidase and nuclease in close distances. The 22F6 catalytic light chain could suppress the infection of influenza virus type A (H1N1) of Madin-Darby canine kidney cells in an in vitro assay. In addition, the catalytic light chain clearly inhibited the infection of the influenza virus of BALB/c mice via nasal administration in an in vivo assay. In the experiment, the titer in the serum of the mice coinfected with the 22F6 light chain and H1N1 virus became considerably lowered compared with that of 22F6-non-coinfected mice. Note that the catalytic light chain was prepared from human peripheral lymphocyte and plays an important role in preventing infection by influenza virus. Considering the fact that the human light chain did not show any acute toxicity for mice, our procedure developed in this study must be unique and noteworthy for developing new drugs.
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Affiliation(s)
- Emi Hifumi
- Research Center for Applied Medical Engineering, Oita University, Dan-noharu 700, Oita-shi, Oita 870-1192, Japan.
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