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Happonen N, Härma MA, Akhi R, Nissinen AE, Savolainen MJ, Ruuth M, Öörni K, Adeshara K, Lehto M, Groop PH, Koivukangas V, Hukkanen J, Hörkkö S. Impact of RYGB surgery on plasma immunoglobulins: association between blood pressure and glucose levels six months after surgery. APMIS 2024; 132:187-197. [PMID: 38149431 DOI: 10.1111/apm.13366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/23/2023] [Indexed: 12/28/2023]
Abstract
We aimed to study levels of natural antibodies in plasma, and their associations to clinical and fecal biomarkers, before and 6 months after Roux-en-Y gastric bypass (RYGB) surgery. Thirty individuals with obesity [16 type 2 diabetic, 14 non-diabetic (ND)] had RYGB surgery. Total plasma IgA, IgG and IgM antibody levels and specific antibodies to oxidized low-density lipoprotein (oxLDL), malondialdehyde-acetaldehyde adducts, Porphyromonas gingivalis gingipain A hemagglutinin domain (Rgp44), and phosphocholine were measured using chemiluminescence immunoassay. Associations between plasma and fecal antibodies as well as clinical markers were analyzed. RYGB surgery reduced blood pressure, and the glycemic state was improved. A higher level of diastolic blood pressure was associated with lower plasma antibodies to oxLDL after surgery. Also, lower level of glucose markers associated with lower level of plasma antibodies to bacterial virulence factors. Antibodies to oxLDL decreased after surgery, and positive association between active serum lipopolysaccharide and specific oxLDL antibodies was detected. Total IgG levels decreased after surgery, but only in ND individuals. Reduced level of total plasma IgG, improved state of hypertension and hyperglycemia and their associations with decreased levels of specific antibodies in plasma, suggest an improved state of systemic inflammation after RYGB surgery.
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Affiliation(s)
- Natalie Happonen
- Medical Microbiology and Immunology, Research Unit of Biomedicine and Internal Medicine, University of Oulu, Oulu, Finland
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
- Nordlab, Oulu University Hospital, Oulu, Finland
| | - Mari-Anne Härma
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Department of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Ramin Akhi
- Medical Microbiology and Immunology, Research Unit of Biomedicine and Internal Medicine, University of Oulu, Oulu, Finland
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Antti E Nissinen
- Medical Microbiology and Immunology, Research Unit of Biomedicine and Internal Medicine, University of Oulu, Oulu, Finland
| | - Markku J Savolainen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
- Research Unit of Biomedicine and Internal Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Maija Ruuth
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland
| | - Katariina Öörni
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland
- Molecular and Integrative Biosciences, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Krishna Adeshara
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Department of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Markku Lehto
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Department of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Per-Henrik Groop
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Department of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Vesa Koivukangas
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
- Department of Surgery, Oulu University Hospital, Oulu, Finland
| | - Janne Hukkanen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
- Research Unit of Biomedicine and Internal Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Sohvi Hörkkö
- Medical Microbiology and Immunology, Research Unit of Biomedicine and Internal Medicine, University of Oulu, Oulu, Finland
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
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2
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Castillo-Corujo A, Saaranen MJ, Ruddock LW. Cytoplasmic production of Fabs in chemically defined media in fed-batch fermentation. Protein Expr Purif 2024; 215:106404. [PMID: 37979630 DOI: 10.1016/j.pep.2023.106404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/12/2023] [Accepted: 11/13/2023] [Indexed: 11/20/2023]
Abstract
Fragment of antigen-binding region (Fab) of antibodies are important biomolecules, with a broad spectrum of functionality in the biomedical field. While full length antibodies are usually produced in mammalian cells, the smaller size, lack of N-glycosylation and less complex structure of Fabs make production in microbial cell factories feasible. Since Fabs contain disulfide bonds, such production is often done in the periplasm, but there the formation of the inter-molecular disulfide bond between light and heavy chains can be problematic. Here we studied the use of the CyDisCo system (cytoplasmic disulfide bond formation in E. coli) to express two Fabs (Herceptin and Maa48) in the cytoplasm of E. coli in fed-batch fermentation using a generic chemically defined media. We were able to solubly express both Fabs with purified yields of 565 mg/L (Maa48) and 660 mg/L (Herceptin) from low density fermentation. Both proteins exhibited CD spectra consistent with natively folded protein and both were biologically active. To our knowledge this is the first demonstration of high-level production of biological active Fabs in the cytoplasm of E. coli in industrially relevant fermentation conditions.
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Affiliation(s)
| | - Mirva J Saaranen
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Lloyd W Ruddock
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.
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3
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Sahlström P, Joshua V, Valkovskaia V, Biese C, Stålesen R, Israelsson L, Végvári Á, Scheel-Toellner D, Klareskog L, Hansson M, Hensvold A, Malmström V, Grönwall C. Autoreactive B cells against malondialdehyde-induced protein cross-links are present in the joint, lung, and bone marrow of rheumatoid arthritis patients. J Biol Chem 2023; 299:105320. [PMID: 37802315 PMCID: PMC10641667 DOI: 10.1016/j.jbc.2023.105320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 09/28/2023] [Indexed: 10/08/2023] Open
Abstract
Autoantibodies to malondialdehyde (MDA) proteins constitute a subset of anti-modified protein autoantibodies in rheumatoid arthritis (RA), which is distinct from citrulline reactivity. Serum anti-MDA IgG levels are commonly elevated in RA and correlate with disease activity, CRP, IL6, and TNF-α. MDA is an oxidation-associated reactive aldehyde that together with acetaldehyde mediates formation of various immunogenic amino acid adducts including linear MDA-lysine, fluorescent malondialdehyde acetaldehyde (MAA)-lysine, and intramolecular cross-linking. We used single-cell cloning, generation of recombinant antibodies (n = 356 from 25 donors), and antigen-screening to investigate the presence of class-switched MDA/MAA+ B cells in RA synovium, bone marrow, and bronchoalveolar lavage. Anti-MDA/MAA+ B cells were found in bone marrow plasma cells of late disease and in the lung of both early disease and risk-individuals and in different B cell subsets (memory, double negative B cells). These were compared with previously identified anti-MDA/MAA from synovial memory and plasma cells. Seven out of eight clones carried somatic hypermutations and all bound MDA/MAA-lysine independently of protein backbone. However, clones with somatic hypermutations targeted MAA cross-linked structures rather than MDA- or MAA-hapten, while the germline-encoded synovial clone instead bound linear MDA-lysine in proteins and peptides. Binding patterns were maintained in germline converted clones. Affinity purification of polyclonal anti-MDA/MAA from patient serum revealed higher proportion of anti-MAA versus anti-MDA compared to healthy controls. In conclusion, IgG anti-MDA/MAA show distinct targeting of different molecular structures. Anti-MAA IgG has been shown to promote bone loss and osteoclastogenesis in vivo and may contribute to RA pathogenesis.
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Affiliation(s)
- Peter Sahlström
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Vijay Joshua
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Viktoriia Valkovskaia
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Charlotte Biese
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Ragnhild Stålesen
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Lena Israelsson
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Ákos Végvári
- Division of Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Dagmar Scheel-Toellner
- Rheumatology Research Group, Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Lars Klareskog
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Monika Hansson
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Aase Hensvold
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden; Center for Rheumatology, Academic Specialist Center, Stockholm Health Region, Stockholm, Sweden
| | - Vivianne Malmström
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Caroline Grönwall
- Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.
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4
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Macchiarella G, Cornacchione V, Cojean C, Riker J, Wang Y, Te H, Ceci M, Gudjonsson JE, Gaulis S, Goetschy JF, Wollschlegel A, Gass SK, Oetliker-Contin S, Wettstein-Ling B, Schaefer DJ, Meschberger P, de Roche R, Osinga R, Wieczorek G, Naumann U, Lehmann JCU, Schubart A, Hofmann A, Roth L, Florencia EF, Loesche C, Traggiai E, Avrameas A, Prens EP, Röhn TA, Roediger B. Disease Association of Anti‒Carboxyethyl Lysine Autoantibodies in Hidradenitis Suppurativa. J Invest Dermatol 2023; 143:273-283.e12. [PMID: 36116506 DOI: 10.1016/j.jid.2022.08.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 08/01/2022] [Accepted: 08/05/2022] [Indexed: 01/25/2023]
Abstract
Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease characterized by recurring suppurating lesions of the intertriginous areas, resulting in a substantial impact on patients' QOL. HS pathogenesis remains poorly understood. An autoimmune component has been proposed, but disease-specific autoantibodies, autoantigens, or autoreactive T cells have yet to be described. In this study, we identify a high prevalence of IgM, IgG, and IgA antibodies directed against Nε-carboxyethyl lysine (CEL), a methylglyoxal-induced advanced glycation end-product, in the sera of patients with HS. Titers of anti-CEL IgG and IgA antibodies were highly elevated in HS compared with those in healthy controls and individuals with other inflammatory skin diseases. Strikingly, the majority of anti-CEL IgG was of the IgG2 subclass and correlated independently with both disease severity and duration. Both CEL and anti-CEL‒producing plasmablasts could be isolated directly from HS skin lesions, further confirming the disease relevance of this autoimmune response. Our data point to an aberration of the methylglyoxal pathway in HS and support an autoimmune axis in the pathogenesis of this debilitating disease.
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Affiliation(s)
- Giulio Macchiarella
- Biomarker Development (BMD), Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland; Biozentrum, Faculty of Sciences, University of Basel, Basel, Switzerland
| | - Vanessa Cornacchione
- NIBR Biologics Center (NBC), Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Celine Cojean
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Julia Riker
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Yichen Wang
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Helene Te
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Melanie Ceci
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | - Swann Gaulis
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Jean François Goetschy
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Audrey Wollschlegel
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Stephanie K Gass
- Department of Plastic, Reconstructive & Aesthetic Surgery and Hand Surgery, University Hospital, University of Basel, Switzerland
| | - Sofia Oetliker-Contin
- Department of Plastic, Reconstructive & Aesthetic Surgery and Hand Surgery, University Hospital, University of Basel, Switzerland
| | - Barbara Wettstein-Ling
- Department of Plastic, Reconstructive & Aesthetic Surgery and Hand Surgery, University Hospital, University of Basel, Switzerland
| | - Dirk J Schaefer
- Department of Plastic, Reconstructive & Aesthetic Surgery and Hand Surgery, University Hospital, University of Basel, Switzerland
| | | | | | - Rik Osinga
- Department of Plastic, Reconstructive & Aesthetic Surgery and Hand Surgery, University Hospital, University of Basel, Switzerland; Praxis beim Merian Iselin, Basel, Switzerland
| | - Grazyna Wieczorek
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Ulrike Naumann
- Chemical Biology and Therapeutics (CBT), Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Joachim C U Lehmann
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Anna Schubart
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Andreas Hofmann
- Biotherapeutic and Analytical Technologies, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Lukas Roth
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Edwin F Florencia
- Department of Dermatology, Erasmus University Medical Centre, Rotterdam, the Netherlands
| | - Christian Loesche
- Translational Medicine, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Elisabetta Traggiai
- NIBR Biologics Center (NBC), Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Alexandre Avrameas
- Biomarker Development (BMD), Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Errol P Prens
- Department of Dermatology, Erasmus University Medical Centre, Rotterdam, the Netherlands
| | - Till A Röhn
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Ben Roediger
- Autoimmunity, Transplantation and Inflammation (ATI) Disease Area, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland.
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5
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Sakuraba K, Krishnamurthy A, Sun J, Zheng X, Xu C, Peng B, Engström M, Jakobsson PJ, Wermeling F, Catrina S, Grönwall C, Catrina AI, Réthi B. Autoantibodies targeting malondialdehyde-modifications in rheumatoid arthritis regulate osteoclasts via inducing glycolysis and lipid biosynthesis. J Autoimmun 2022; 133:102903. [PMID: 36108504 DOI: 10.1016/j.jaut.2022.102903] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/16/2022] [Accepted: 08/23/2022] [Indexed: 12/13/2022]
Abstract
Proteins subjected to post-translational modifications, such as citrullination, carbamylation, acetylation or malondialdehyde (MDA)-modification are targeted by autoantibodies in seropositive rheumatoid arthritis (RA). Epidemiological and experimental studies have both suggested the pathogenicity of such humoral autoimmunity, however, molecular mechanisms triggered by anti-modified protein antibodies have remained to be identified. Here we describe in detail the pathways induced by anti-MDA modified protein antibodies that were obtained from synovial B cells of RA patients and that possessed robust osteoclast stimulatory potential and induced bone erosion in vivo. Anti-MDA antibodies boosted glycolysis in developing osteoclasts via an FcγRI, HIF-1α and MYC-dependent mechanism and subsequently increased oxidative phosphorylation. Osteoclast development required robust phosphoglyceride and triacylglyceride biosynthesis, which was also enhanced by anti-MDA by modulating citrate production and expression of the glycerol-3-phosphate dehydrogenase 1 (GPD1) and glycerol-3-phosphate acyltransferase 2 (GPAT2) genes. In summary, we described novel metabolic pathways instrumental for osteoclast differentiation, which were targeted by anti-MDA antibodies, accelerating bone erosion, a central component of RA pathogenesis.
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Affiliation(s)
- Koji Sakuraba
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden; Department of Orthopedic Surgery and Rheumatology, Clinical Research Center, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
| | - Akilan Krishnamurthy
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Jitong Sun
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Xiaowei Zheng
- Department of Molecular Medicine and Surgery, Karolinska Institutet and Center for Diabetes, Academic Specialist Centrum, Stockholm, Sweden
| | - Cheng Xu
- Department of Molecular Medicine and Surgery, Karolinska Institutet and Center for Diabetes, Academic Specialist Centrum, Stockholm, Sweden
| | - Bing Peng
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Marianne Engström
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Per-Johan Jakobsson
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Fredrik Wermeling
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Sergiu Catrina
- Department of Molecular Medicine and Surgery, Karolinska Institutet and Center for Diabetes, Academic Specialist Centrum, Stockholm, Sweden
| | - Caroline Grönwall
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Anca I Catrina
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Bence Réthi
- Division of Rheumatology, Department of Medicine/Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden.
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6
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Istomin N, Härma MA, Akhi R, Nissinen AE, Savolainen MJ, Adeshara K, Lehto M, Groop PH, Koivukangas V, Hukkanen J, Hörkkö S. Total fecal IgA levels increase and natural IgM antibodies decrease after gastric bypass surgery. APMIS 2022; 130:637-646. [PMID: 35959517 PMCID: PMC9805076 DOI: 10.1111/apm.13268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 08/09/2022] [Indexed: 01/10/2023]
Abstract
Obesity is associated with low-grade inflammation and increased systemic oxidative stress. Roux-en-Y gastric bypass (RYGB) surgery is known to ameliorate the obesity-induced metabolic dysfunctions. We aimed to study the levels of natural antibodies in feces, before and 6 months after RYGB surgery in obese individuals with and without type 2 diabetes (T2D). Sixteen individuals with T2D and 14 non-diabetic (ND) individuals were operated. Total IgA, IgG and IgM antibody levels and specific antibodies to oxidized low-density lipoprotein (oxLDL), malondialdehyde-acetaldehyde adducts (MAA adducts), Porphyromonas gingivalis gingipain A hemagglutinin domain (Rgp44) and phosphocholine (PCho) were measured using chemiluminescence immunoassay. Total fecal IgA was elevated, while total IgM and IgG were not affected by the surgery. Fecal natural IgM specific to oxLDL decreased significantly in both T2D and ND individuals, while fecal IgM to Rgp44 and PCho decreased significantly in T2D individuals. A decrease in IgG to MAA-LDL, Rgp44 and PCho was detected. RYGB surgery increases the levels of total fecal IgA and decreases fecal natural IgG and IgM antibodies specific to oxLDL. Natural antibodies and IgA are important in maintaining the normal gut homeostasis and first-line defense against microbes, and their production is markedly altered with RYGB surgery.
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Affiliation(s)
- Natalie Istomin
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.,Nordlab, Oulu University Hospital, Oulu, Finland
| | - Mari-Anne Härma
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland.,Abdominal Center, Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Clinical and Molecular Metabolism, Faculty of Medicine Research Programs, University of Helsinki, Helsinki, Finland
| | - Ramin Akhi
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Antti E Nissinen
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland
| | - Markku J Savolainen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.,Research Unit of Internal Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Krishna Adeshara
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland.,Abdominal Center, Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Clinical and Molecular Metabolism, Faculty of Medicine Research Programs, University of Helsinki, Helsinki, Finland
| | - Markku Lehto
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland.,Abdominal Center, Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Clinical and Molecular Metabolism, Faculty of Medicine Research Programs, University of Helsinki, Helsinki, Finland
| | - Per-Henrik Groop
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland.,Abdominal Center, Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Clinical and Molecular Metabolism, Faculty of Medicine Research Programs, University of Helsinki, Helsinki, Finland
| | - Vesa Koivukangas
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.,Department of Surgery, Oulu University Hospital, Oulu, Finland
| | - Janne Hukkanen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.,Research Unit of Internal Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Sohvi Hörkkö
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
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7
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Massalska MA, Gober HJ. How Children Are Protected From COVID-19? A Historical, Clinical, and Pathophysiological Approach to Address COVID-19 Susceptibility. Front Immunol 2021; 12:646894. [PMID: 34177895 PMCID: PMC8226076 DOI: 10.3389/fimmu.2021.646894] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 05/21/2021] [Indexed: 01/08/2023] Open
Abstract
The origin and the global spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causing coronavirus disease 2019 (COVID-19) in early 2020 was accompanied by high rates of mortality in regions belonging to the ancient silk road, such as the south of China, Iran, Turkey and the northern parts of Italy. However, children seem to be spared in the epidemic as very small percentage worldwide being ill. The protection of children and neonates suggests the involvement of a specific component of adaptive immunity present at early development. Native immunoglobulin belonging to the class of IgM is abundantly present in neonates and children and is known for its recognition of self- and altered self-antigens. Native IgM may be able to neutralize virus by the recognition of endogenous "danger signal" encoded in the viral envelope and originally imprinted in the membranes of infected and stressed cells. Noteworthy, thrombosis and vasculitis, two symptoms in severely affected adult and pediatric patients are shared between COVID-19 and patients with Behcet's disease, an autoimmune disorder exhibiting a region-specific prevalence in countries of the former silk road. Molecular mechanisms and clinical indicators suggest reactive oxygen species as trigger factor for severe progression of COVID-19 and establish a link to the innate immune defense against bacteria. The selective pressure exerted by bacterial pathogens may have shaped the genetics of inhabitants at this ancient trade route in favor of bacterial defense, to the detriment of severe COVID-19 progression in the 21th century.
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Affiliation(s)
- Magdalena Anna Massalska
- Department of Pathophysiology and Immunology, National Institute of Geriatrics, Rheumatology, and Rehabilitation, Warsaw, Poland
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8
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Grönwall C, Liljefors L, Bang H, Hensvold AH, Hansson M, Mathsson-Alm L, Israelsson L, Joshua V, Svärd A, Stålesen R, Titcombe PJ, Steen J, Piccoli L, Sherina N, Clavel C, Svenungsson E, Gunnarsson I, Saevarsdottir S, Kastbom A, Serre G, Alfredsson L, Malmström V, Rönnelid J, Catrina AI, Lundberg K, Klareskog L. A Comprehensive Evaluation of the Relationship Between Different IgG and IgA Anti-Modified Protein Autoantibodies in Rheumatoid Arthritis. Front Immunol 2021; 12:627986. [PMID: 34093522 PMCID: PMC8173192 DOI: 10.3389/fimmu.2021.627986] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 04/26/2021] [Indexed: 12/25/2022] Open
Abstract
Seropositive rheumatoid arthritis (RA) is characterized by the presence of rheumatoid factor (RF) and anti-citrullinated protein autoantibodies (ACPA) with different fine-specificities. Yet, other serum anti-modified protein autoantibodies (AMPA), e.g. anti-carbamylated (Carb), -acetylated (KAc), and malondialdehyde acetaldehyde (MAA) modified protein antibodies, have been described. In this comprehensive study, we analyze 30 different IgG and IgA AMPA reactivities to Cit, Carb, KAc, and MAA antigens detected by ELISA and autoantigen arrays in N=1985 newly diagnosed RA patients. Association with patient characteristics such as smoking and disease activity were explored. Carb and KAc reactivities by different assays were primarily seen in patients also positive for anti-citrulline reactivity. Modified vimentin (mod-Vim) peptides were used for direct comparison of different AMPA reactivities, revealing that IgA AMPA recognizing mod-Vim was mainly detected in subsets of patients with high IgG anti-Cit-Vim levels and a history of smoking. IgG reactivity to acetylation was mainly detected in a subset of patients with Cit and Carb reactivity. Anti-acetylated histone reactivity was RA-specific and associated with high anti-CCP2 IgG levels, multiple ACPA fine-specificities, and smoking status. This reactivity was also found to be present in CCP2+ RA-risk individuals without arthritis. Our data further demonstrate that IgG autoreactivity to MAA was increased in RA compared to controls with highest levels in CCP2+ RA, but was not RA-specific, and showed low correlation with other AMPA. Anti-MAA was instead associated with disease activity and was not significantly increased in CCP2+ individuals at risk of RA. Notably, RA patients could be subdivided into four different subsets based on their AMPA IgG and IgA reactivity profiles. Our serology results were complemented by screening of monoclonal antibodies derived from single B cells from RA patients for the same antigens as the RA cohort. Certain CCP2+ clones had Carb or Carb+KAc+ multireactivity, while such reactivities were not found in CCP2- clones. We conclude that autoantibodies exhibiting different patterns of ACPA fine-specificities as well as Carb and KAc reactivity are present in RA and may be derived from multireactive B-cell clones. Carb and KAc could be considered reactivities within the “Cit-umbrella” similar to ACPA fine-specificities, while MAA reactivity is distinctly different.
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Affiliation(s)
- Caroline Grönwall
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Lisa Liljefors
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | | | - Aase H Hensvold
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,Center for Rheumatology, Academic Specialist Center, Stockholm Health Region, Stockholm, Sweden.,Rheumatology Clinic, Karolinska University Hospital, Stockholm, Sweden
| | - Monika Hansson
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Linda Mathsson-Alm
- Thermo Fisher Scientific, Immuno Diagnostics Division, Uppsala, Sweden.,Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Lena Israelsson
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Vijay Joshua
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Anna Svärd
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.,Center for Clinical Research Dalarna, Uppsala University, Uppsala, Sweden
| | - Ragnhild Stålesen
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Philip J Titcombe
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,The Center for Immunology and Division of Rheumatic and Autoimmune Diseases, University of Minnesota Medical School, Minneapolis, MN, United States
| | - Johanna Steen
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Luca Piccoli
- Institute for Research in Biomedicine, Università della Svizzera italiana, Bellinzona, Switzerland
| | - Natalia Sherina
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Cyril Clavel
- Unité Différenciation Épithéliale et Autoimmunité Rhumatoïde, INSERM - Université de Toulouse, Toulouse, France
| | - Elisabet Svenungsson
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,Rheumatology Clinic, Karolinska University Hospital, Stockholm, Sweden
| | - Iva Gunnarsson
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,Rheumatology Clinic, Karolinska University Hospital, Stockholm, Sweden
| | - Saedis Saevarsdottir
- Department of Medicine Solna, Division of Clinical Epidemiology, Karolinska Institutet, Stockholm, Sweden.,Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Alf Kastbom
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Guy Serre
- Unité Différenciation Épithéliale et Autoimmunité Rhumatoïde, INSERM - Université de Toulouse, Toulouse, France
| | - Lars Alfredsson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Centre for Occupational and Environmental Medicine, Stockholm Health Region, Stockholm, Sweden
| | - Vivianne Malmström
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Johan Rönnelid
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Anca I Catrina
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,Center for Rheumatology, Academic Specialist Center, Stockholm Health Region, Stockholm, Sweden.,Rheumatology Clinic, Karolinska University Hospital, Stockholm, Sweden
| | - Karin Lundberg
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Lars Klareskog
- Department of Medicine Solna, Division of Rheumatology, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,Center for Rheumatology, Academic Specialist Center, Stockholm Health Region, Stockholm, Sweden.,Rheumatology Clinic, Karolinska University Hospital, Stockholm, Sweden
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9
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Elfarargy MS, Al-Ashmawy GM, Abu-Risha S, Khattab H. Novel predictor markers for early differentiation between transient tachypnea of newborn and respiratory distress syndrome in neonates. Int J Immunopathol Pharmacol 2021; 35:20587384211000554. [PMID: 33722097 PMCID: PMC7970176 DOI: 10.1177/20587384211000554] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Neonatal Respiratory Distress Syndrome (RDS) and Transient Tachypnea of newborn
(TTN) are common similar neonatal respiratory diseases. Study the early
predictor markers in differentiation between TTN and RDS in neonates. A
prospective case control study which was done in Neonatal Intensive Care Unit
(NICU) of Tanta University Hospital (TUH) from September 2016 to March 2018.
Three groups of neonates were included in the study: RDS group (45 neonates),
TTN group (45 neonates), and control group (45 healthy neonates). There were
statistically significant difference (SSD) between our studied three groups as
regard serum Malondialdehyde (MDA), Superoxide dismutase SOD, Lactate
dehydrogenase (LDH), and blood PH and P-values were 0.001* for
these comparative parameters. The ROC curve of RDS cases revealed that the serum
MDA Cut off, sensitivity and specificity were 1.87 mmol/L, 98%, 96%,
respectively which had the highest sensitivity and specificity followed by the
serum SOD then the serum LDH and lastly the blood PH while in TTN cases, the
serum MDA Cut off, sensitivity and specificity were 0.74 mmol/L, 96%, 93%,
respectively then the serum SOD then the serum LDH and lastly the blood PH.
Serum MDA, SOD, LDH, and PH had a beneficial role as early predictors in
differentiation between TTN and RDS in neonates.
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Affiliation(s)
| | - Ghada M Al-Ashmawy
- Department of Biochemistry, Faculty of Pharmacy, Tanta University, Tanta, Egypt
| | - Sally Abu-Risha
- Department of Pharmacology& Toxicology, Faculty of Pharmacy, Tanta University, Tanta, Egypt
| | - Haidy Khattab
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
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10
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Kyrklund M, Kaski H, Akhi R, Nissinen AE, Kummu O, Bergmann U, Pussinen P, Hörkkö S, Wang C. Existence of natural mouse IgG mAbs recognising epitopes shared by malondialdehyde acetaldehyde adducts and Porphyromonas gingivalis. Innate Immun 2021; 27:158-169. [PMID: 33445998 PMCID: PMC7882809 DOI: 10.1177/1753425920981133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Natural Abs are produced by B lymphocytes in the absence of external Ag stimulation. They recognise self, altered self and foreign Ags, comprising an important first-line defence against invading pathogens and serving as innate recognition receptors for tissue homeostasis. Natural IgG Abs have been found in newborns and uninfected individuals. Yet, their physiological role remains unclear. Previously, no natural IgG Abs to oxidation-specific epitopes have been reported. Here, we show the cloning and characterisation of mouse IgG mAbs against malondialdehyde acetaldehyde (MAA)-modified low-density lipoprotein. Sequence analysis reveals high homology with germline genes, suggesting that they are natural. Further investigation shows that the MAA-specific natural IgG Abs cross-react with the major periodontal pathogen Porphyromonas gingivalis and recognise its principle virulence factors gingipain Kgp and long fimbriae. The study provides evidence that natural IgGs may play an important role in innate immune defence and in regulation of tissue homeostasis by recognising and removing invading pathogens and/or modified self-Ags, thus being involved in the development of periodontitis and atherosclerosis.
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MESH Headings
- Acetaldehyde/chemistry
- Acetaldehyde/metabolism
- Animals
- Antibodies, Monoclonal/isolation & purification
- Antibodies, Monoclonal/metabolism
- Clone Cells
- Epitopes, B-Lymphocyte/metabolism
- Fimbriae Proteins/metabolism
- Gingipain Cysteine Endopeptidases/metabolism
- Immunity, Innate
- Immunoglobulin G/isolation & purification
- Immunoglobulin G/metabolism
- Lipoproteins, LDL/chemistry
- Lipoproteins, LDL/metabolism
- Malondialdehyde/chemistry
- Malondialdehyde/metabolism
- Mice
- Mice, Knockout
- Oxidation-Reduction
- Periodontitis/immunology
- Porphyromonas gingivalis/physiology
- Receptors, LDL/genetics
- Receptors, Pattern Recognition/isolation & purification
- Receptors, Pattern Recognition/metabolism
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Affiliation(s)
- Mikael Kyrklund
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Finland
- Medical Research Centre and Nordlab Oulu, University Hospital and University of Oulu, Finland
| | - Heidi Kaski
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Finland
| | - Ramin Akhi
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Finland
- Medical Research Centre and Nordlab Oulu, University Hospital and University of Oulu, Finland
| | - Antti E Nissinen
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Finland
- Medical Research Centre and Nordlab Oulu, University Hospital and University of Oulu, Finland
| | - Outi Kummu
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Finland
- Medical Research Centre and Nordlab Oulu, University Hospital and University of Oulu, Finland
| | - Ulrich Bergmann
- Protein Analysis Core Facility, Biocentre Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu, Finland
| | - Pirkko Pussinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Finland
| | - Sohvi Hörkkö
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Finland
- Medical Research Centre and Nordlab Oulu, University Hospital and University of Oulu, Finland
| | - Chunguang Wang
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Finland
- Medical Research Centre and Nordlab Oulu, University Hospital and University of Oulu, Finland
- Minerva Foundation Institute for Medical Research, Biomedicum Helsinki 2U, Finland
- Chunguang Wang, Cardiovascular Research Unit, Minerva Foundation Institute for Medical Research, Biomedicum Helsinki 2U, Tukholmankatu 8, Helsinki 00290, Finland.
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11
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Interplay of pro-inflammatory cytokines, pro-inflammatory microparticles and oxidative stress and recurrent ventricular arrhythmias in elderly patients after coronary stent implantations. Cytokine 2020; 137:155345. [PMID: 33137563 DOI: 10.1016/j.cyto.2020.155345] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 09/09/2020] [Accepted: 10/12/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND The roles of pro-inflammatory microparticles, pro-inflammatory cytokines and oxidative stress were unknown in elderly patients with recurrent ventricular arrhythmias (VA). We evaluated whether cross talk between oxidative stress, pro-inflammatory microparticles, and pro-inflammatory cytokines play the roles in elderly patients with recurrent VA after coronary stenting. This research sought to investigate the effects of oxidative stress, pro-inflammatory microparticles, and pro-inflammatory cytokines on recurrent VA in elderly patients after coronary stenting. METHODS In this study, we included 613 consecutive elderly patients with recurrent ventricular arrhythmias induced by coronary reocclusions after coronary stenting. We measured CD31+ endothelial microparticle (CD31+EMP), CD62E+ endothelial microparticle (CD62E+EMP), high-sensitivity C-reactive protein (hs-CRP), aldosterone (ALD), malondialdehyde (MDA), tumor necrosis factor-α (TNF-α), soluble tumor necrosis factor receptor-1 (sTNFR-1) and soluble tumor necrosis factor receptor-2 (sTNFR-2) in elderly patients with recurrent VA and assessed impacts of pro-inflammatory microparticles, pro-inflammatory cytokines and oxidative stress on recurrent VA in elderly patients after coronary stenting. RESULTS The levels of CD31+EMP, CD62E+EMP, hs-CRP, ALD, MDA, TNF-α, sTNFR-1 and sTNFR-2 were increased in recurrent malignant ventricular arrhythmia, sustained ventricular tachycardia, multiple ventricular premature beat and left and right ventricular bundle branch block groups (P < 0.001) in elderly patients with coronary reocclusions after coronary stent implantation. Upregulation of pro-inflammatory microparticles, pro-inflammatory cytokines and oxidative stress markers induced recurrent VA in elderly patients after coronary stenting. CONCLUSIONS High levels of pro-inflammatory microparticles, pro-inflammatory cytokines and oxidative stress markers were associated with recurrent VA in elderly patients after coronary stenting. Our results suggested that the pro-inflammatory microparticles, pro-inflammatory cytokines and oxidative stress may simultaneously induce and aggravate recurrent VA in elderly patients after coronary stenting.
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12
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Thiagarajan D, Lundström SL, Pershagen G, Almqvist C, Andolf E, Hedman A, Berg O, Oparina N, Frostegård J. Antibodies against Phosphorylcholine and Malondialdehyde during the First Two Years of Life. THE JOURNAL OF IMMUNOLOGY 2020; 205:2109-2116. [PMID: 32887753 DOI: 10.4049/jimmunol.2000437] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 08/05/2020] [Indexed: 01/21/2023]
Abstract
Abs against phosphorylcholine (anti-PC) and Abs against malondialdehyde (anti-MDA) may be protective in chronic inflammation, like atherosclerosis and cardiovascular disease. It is not known how they develop early in life. Ab titers were measured using ELISA in healthy women (n = 105; born into life study) and their children. Plasma samples were collected from the mothers before conception and from the children at birth as well as at 1 and 2 y after birth. Extracted Abs were compared using a proteomics de novo sequencing approach. It was observed that children were born with very low levels of IgM anti-PC, whereas IgM anti-MDA was present at birth. Both IgM anti-PC and anti-MDA increased during the first 2 y of life, but IgM anti-PC in contrast to IgM anti-MDA was still significantly lower than in the mothers. IgG anti-PC decreased after 1 y but reached similar levels as mothers' after 2 y, whereas IgG anti-MDA reached similar levels as mothers' already after 1 y. Proteomics peptide sequencing analysis indicated large peptide sequence variation without specific clone expression during the early stage of life compared with the adult stage for which specific peptide sequences dominated. IgM anti-PC levels develop much slower than anti-MDA and are still relatively low at 2 y. We hypothesize that anti-PC is developed by a combination of preprogramming and exposure to the external world, in which infectious agents may play a role. For anti-MDA, preprogramming is likely to play a major role and at an earlier stage than for anti-PC.
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Affiliation(s)
- Divya Thiagarajan
- Institute of Environmental Medicine, Karolinska Institutet, SE 17177 Stockholm, Sweden
| | - Susanna L Lundström
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE 17177 Stockholm, Sweden
| | - Göran Pershagen
- Institute of Environmental Medicine, Karolinska Institutet, SE 17177 Stockholm, Sweden.,Centre for Occupational and Environmental Medicine, Region Stockholm, SE 17080 Stockholm, Sweden
| | - Catarina Almqvist
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, SE 17177 Stockholm, Sweden.,Pediatric Allergy and Pulmonology Unit, Astrid Lindgren Children's Hospital, Karolinska University Hospital, SE 17164 Stockholm, Sweden; and
| | - Ellika Andolf
- Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, SE 18288 Stockholm, Sweden
| | - Anna Hedman
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, SE 17177 Stockholm, Sweden
| | - Oscar Berg
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, SE 17177 Stockholm, Sweden
| | - Nina Oparina
- Institute of Environmental Medicine, Karolinska Institutet, SE 17177 Stockholm, Sweden
| | - Johan Frostegård
- Institute of Environmental Medicine, Karolinska Institutet, SE 17177 Stockholm, Sweden;
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13
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Kyrklund M, Bildo M, Akhi R, Nissinen AE, Pussinen P, Hörkkö S, Wang C. Humoral immune response to heat shock protein 60 of Aggregatibacter actinomycetemcomitans and cross-reactivity with malondialdehyde acetaldehyde-modified LDL. PLoS One 2020; 15:e0230682. [PMID: 32210456 PMCID: PMC7094845 DOI: 10.1371/journal.pone.0230682] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 03/05/2020] [Indexed: 11/18/2022] Open
Abstract
Atherosclerosis is a chronic inflammatory disease and major cause of mortality worldwide. One of the crucial steps for atherosclerotic plaque development is oxidation of low-density lipoprotein (LDL). Through the oxidation, highly immunogenic epitopes are created and the immune system is activated. Association between atherosclerosis and periodontal diseases is well documented, and one of the main oral pathogens common in periodontitis is Aggregatibacter actinomycetemcomitans (Aa). Heat shock protein 60 (HSP60) is an important virulence factor for Aa bacteria and a strong activator of the immune system. Cross-reactivity of HSP60 and oxidized LDL (OxLDL) antibodies could be a potential mechanism in the progression of atherosclerosis and one possible link between atherosclerosis and periodontitis. Human plasma samples from neonates and mothers were analyzed to determine if antibody titer to Aa-HSP60 protein is already present in newborns. Further objectives were to characterize antibody response in Aa-HSP60 immunized mice and to determine possible antibody cross-reaction with oxidized LDL. We demonstrated that newborns already have IgM antibody levels to Aa-HSP60. We also showed that in mice, Aa-HSP60 immunization provoked IgG and IgM antibody response not only to Aa-HSP60 but also to malondialdehyde acetaldehyde-modified LDL (MAA-LDL). Competition assay revealed that the antibodies were specific to Aa-HSP60 and cross-reacted with MAA-LDL. Our results suggest a possibility of molecular mimicry between Aa-HSP60 and MAA-LDL, making it intriguing to speculate on the role of HSP60 protein in atherosclerosis that manifests at young age.
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Affiliation(s)
- Mikael Kyrklund
- Research Unit of Biomedicine, Medical Microbiology and Immunology, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland
| | - Mika Bildo
- Research Unit of Biomedicine, Medical Microbiology and Immunology, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Ramin Akhi
- Research Unit of Biomedicine, Medical Microbiology and Immunology, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland
| | - Antti E. Nissinen
- Research Unit of Biomedicine, Medical Microbiology and Immunology, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland
| | - Pirkko Pussinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Sohvi Hörkkö
- Research Unit of Biomedicine, Medical Microbiology and Immunology, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland
| | - Chunguang Wang
- Research Unit of Biomedicine, Medical Microbiology and Immunology, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland
- Minerva Foundation Institute for Medical Research, Helsinki, Finland
- * E-mail:
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14
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Isola G, Polizzi A, Santonocito S, Alibrandi A, Ferlito S. Expression of Salivary and Serum Malondialdehyde and Lipid Profile of Patients with Periodontitis and Coronary Heart Disease. Int J Mol Sci 2019; 20:E6061. [PMID: 31805680 PMCID: PMC6928957 DOI: 10.3390/ijms20236061] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 11/28/2019] [Accepted: 11/29/2019] [Indexed: 02/07/2023] Open
Abstract
Malondialdehyde (MAA) within a lipid pathway has been demonstrated to possess an important role in endothelial function that undergoes periodontitis and coronary heart disease (CHD) development. This study evaluated the impact of periodontitis, CHD, or a combination of both diseases (periodontitis + CHD) on salivary and serum MAA levels. The periodontal and clinical characteristics, serum, and saliva samples were collected from 32 healthy subjects, 34 patients with periodontitis, 33 patients with CHD, and 34 patients with periodontitis and CHD. Lipid profile and levels of MDA and C-reactive protein (CRP) were assessed. Patients in the periodontitis group (serum: 3.92 (3.7-4.4) µmol/L; salivary 1.81 (1-2.1) µmol/g protein, p < 0.01) and in the periodontitis + CHD (serum: 4.34 (3.7-4.8) µmol/L; salivary 1.96 (1.7-2.3) µmol/g protein, p < 0.001) group presented higher median concentrations of salivary and serum MAA compared to patients in the CHD (serum: 3.72 (3.5-4.1) µmol/L; salivary 1.59 (0.9-1.8) µmol/g protein, p < 0.01) and control group (serum: 3.14 (2.8-3.7) µmol/L; salivary 1.41 (0.8-1.6) µmol/g protein, p < 0.01). In univariate models, periodontitis (p = 0.034), CHD (p < 0.001), and CRP (p < 0.001) were significantly associated with MAA. In the multivariate model, only CRP remained a significant predictor of serum and salivary MAA (p < 0.001) MAA levels. Patients with periodontitis and with periodontitis + CHD presented higher levels of salivary and serum MAA compared to healthy subjects and CHD patients. CRP has been found to be a significant predictor of increased salivary and serum MAA levels.
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Affiliation(s)
- Gaetano Isola
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy
| | - Alessandro Polizzi
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy
| | - Simona Santonocito
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy
| | - Angela Alibrandi
- Department of Economical, Business and Environmental Sciences and Quantitative Methods, University of Messina, 98122 Messina, Italy
| | - Sebastiano Ferlito
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy
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15
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Pietiäinen M, Liljestrand JM, Kopra E, Pussinen PJ. Mediators between oral dysbiosis and cardiovascular diseases. Eur J Oral Sci 2019; 126 Suppl 1:26-36. [PMID: 30178551 DOI: 10.1111/eos.12423] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/22/2018] [Indexed: 12/11/2022]
Abstract
Clinical periodontitis is associated with an increased risk for cardiovascular diseases (CVDs) through systemic inflammation as the etiopathogenic link. Whether the oral microbiota, especially its quality, quantity, serology, and virulence factors, plays a role in atherogenesis is not clarified. Patients with periodontitis are exposed to bacteria and their products, which have access to the circulation directly through inflamed oral tissues and indirectly (via saliva) through the gastrointestinal tract, resulting in systemic inflammatory and immunologic responses. Periodontitis is associated with persistent endotoxemia, which has been identified as a notable cardiometabolic risk factor. The serology of bacterial biomarkers for oral dysbiosis is associated with an increased risk for subclinical atherosclerosis, prevalent and future coronary artery disease, and incident and recurrent stroke. In addition to species-specific antibodies, the immunologic response includes persistent, cross-reactive, proatherogenic antibodies against host-derived antigens. Periodontitis may affect lipoprotein metabolism at all levels, and all lipoprotein classes are affected. Periodontitis or its bacterial signatures may be involved not only in increased storage of proatherogenic lipids but also in attenuation of the anti-atherogenic processes, thereby putatively increasing the net risk of atherosclerosis. In this review we summarize possible molecular mediators between the dysbiotic oral microbiota and atherosclerotic processes.
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Affiliation(s)
- Milla Pietiäinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - John M Liljestrand
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Elisa Kopra
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Pirkko J Pussinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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16
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Turunen SP, von Nandelstadh P, Öhman T, Gucciardo E, Seashore-Ludlow B, Martins B, Rantanen V, Li H, Höpfner K, Östling P, Varjosalo M, Lehti K. FGFR4 phosphorylates MST1 to confer breast cancer cells resistance to MST1/2-dependent apoptosis. Cell Death Differ 2019; 26:2577-2593. [PMID: 30903103 PMCID: PMC7224384 DOI: 10.1038/s41418-019-0321-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 02/18/2019] [Accepted: 03/07/2019] [Indexed: 01/01/2023] Open
Abstract
Cancer cells balance with the equilibrium of cell death and growth to expand and metastasize. The activity of mammalian sterile20-like kinases (MST1/2) has been linked to apoptosis and tumor suppression via YAP/Hippo pathway-independent and -dependent mechanisms. Using a kinase substrate screen, we identified here MST1 and MST2 among the top substrates for fibroblast growth factor receptor 4 (FGFR4). In COS-1 cells, MST1 was phosphorylated at Y433 residue in an FGFR4 kinase activity-dependent manner, as assessed by mass spectrometry. Blockade of this phosphorylation by Y433F mutation induced MST1 activation, as indicated by increased threonine phosphorylation of MST1/2, and the downstream substrate MOB1, in FGFR4-overexpressing T47D and MDA-MB-231 breast cancer cells. Importantly, the specific knockdown or short-term inhibition of FGFR4 in endogenous models of human HER2+ breast cancer cells likewise led to increased MST1/2 activation, in conjunction with enhanced MST1 nuclear localization and generation of N-terminal cleaved and autophosphorylated MST1. Unexpectedly, MST2 was also essential for this MST1/N activation and coincident apoptosis induction, although these two kinases, as well as YAP, were differentially regulated in the breast cancer models analyzed. Moreover, pharmacological FGFR4 inhibition specifically sensitized the HER2+ MDA-MB-453 breast cancer cells, not only to HER2/EGFR and AKT/mTOR inhibitors, but also to clinically relevant apoptosis modulators. In TCGA cohort, FGFR4 overexpression correlated with abysmal HER2+ breast carcinoma patient outcome. Therefore, our results uncover a clinically relevant, targetable mechanism of FGFR4 oncogenic activity via suppression of the stress-associated MST1/2-induced apoptosis machinery in tumor cells with prominent HER/ERBB and FGFR4 signaling-driven proliferation.
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Affiliation(s)
- S Pauliina Turunen
- Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institutet, Stockholm, SE-171 77, Sweden
| | - Pernilla von Nandelstadh
- Research Programs Unit, Genome-Scale Biology, Medicum, University of Helsinki and Helsinki University Hospital, Helsinki, FI-00014, Finland
| | - Tiina Öhman
- Institute of Biotechnology, Helsinki Institute of Life Science, University of Helsinki, Helsinki, FI-00014, Finland
| | - Erika Gucciardo
- Research Programs Unit, Genome-Scale Biology, Medicum, University of Helsinki and Helsinki University Hospital, Helsinki, FI-00014, Finland
| | - Brinton Seashore-Ludlow
- Department of Oncology and Pathology, Science for Life Laboratory, Karolinska Institutet, Stockholm, SE-171 77, Sweden
| | - Beatriz Martins
- Research Programs Unit, Genome-Scale Biology, Medicum, University of Helsinki and Helsinki University Hospital, Helsinki, FI-00014, Finland
| | - Ville Rantanen
- Research Programs Unit, Genome-Scale Biology, Medicum, University of Helsinki and Helsinki University Hospital, Helsinki, FI-00014, Finland
| | - Huini Li
- Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institutet, Stockholm, SE-171 77, Sweden
| | - Katrin Höpfner
- Research Programs Unit, Genome-Scale Biology, Medicum, University of Helsinki and Helsinki University Hospital, Helsinki, FI-00014, Finland
| | - Päivi Östling
- Department of Oncology and Pathology, Science for Life Laboratory, Karolinska Institutet, Stockholm, SE-171 77, Sweden
| | - Markku Varjosalo
- Institute of Biotechnology, Helsinki Institute of Life Science, University of Helsinki, Helsinki, FI-00014, Finland
| | - Kaisa Lehti
- Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institutet, Stockholm, SE-171 77, Sweden. .,Research Programs Unit, Genome-Scale Biology, Medicum, University of Helsinki and Helsinki University Hospital, Helsinki, FI-00014, Finland.
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17
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Akhi R, Wang C, Nissinen AE, Kankaanpää J, Bloigu R, Paju S, Mäntylä P, Buhlin K, Sinisalo J, Pussinen PJ, Hörkkö S. Salivary IgA to MAA-LDL and Oral Pathogens Are Linked to Coronary Disease. J Dent Res 2019; 98:296-303. [PMID: 30669938 DOI: 10.1177/0022034518818445] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
A large body of literature has established the link between periodontal disease and cardiovascular disease. Oxidized low-density lipoproteins (OxLDLs) have a crucial role in atherosclerosis progression through initiation of immunological response. Monoclonal IgM antibodies to malondialdehyde-modified low-density lipoprotein (MDA-LDL) and to malondialdehyde acetaldehyde-modified low-density lipoprotein (MAA-LDL) have been shown to cross-react with the key virulence factors of periodontal pathogens Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans. We have previously shown that salivary IgA antibodies to MAA-LDL cross-react with P. gingivalis in healthy humans. In this study, we aim to assess whether oral mucosal immune response represented by salivary IgA to MAA-LDL and oral pathogens is associated with coronary artery disease (CAD). Also, the molecular mimicry through antibody cross-reaction between salivary IgA to MAA-LDL and oral pathogens was evaluated. The study subjects consisted of 451 patients who underwent a coronary angiography with no CAD ( n = 133), stable CAD ( n = 169), and acute coronary syndrome (ACS, n = 149). Elevated salivary IgA antibody levels to MAA-LDL, Rgp44 (gingipain A hemagglutinin domain of P. gingivalis), and Aa-HSP60 (heat shock protein 60 of A. actinomycetemcomitans) were discovered in stable-CAD and ACS patients when compared to no-CAD patients. In a multinomial regression model adjusted for known cardiovascular risk factors, stable CAD and ACS were associated with IgA to MAA-LDL ( P = 0.016, P = 0.043), Rgp44 ( P = 0.012, P = 0.004), Aa-HSP60 ( P = 0.032, P = 0.030), Tannerella forsythia ( P = 0.002, P = 0.004), Porphyromonas endodontalis ( P = 0.016, P = 0.020), Prevotella intermedia ( P = 0.038, P = 0.005), and with total IgA antibody concentration ( P = 0.002, P = 0.016). Salivary IgA to MAA-LDL showed cross-reactivity with the oral pathogens tested in the study patients. The study highlights an association between salivary IgA to MAA-LDL and atherosclerosis. However, whether salivary IgA to MAA-LDL and the related oral humoral responses play a causal role in the development in the CAD should be elucidated in the future.
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Affiliation(s)
- R Akhi
- 1 Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,2 Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,3 Nordlab, Oulu University Hospital, Oulu, Finland
| | - C Wang
- 1 Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,2 Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,3 Nordlab, Oulu University Hospital, Oulu, Finland
| | - A E Nissinen
- 1 Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,2 Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,3 Nordlab, Oulu University Hospital, Oulu, Finland
| | - J Kankaanpää
- 1 Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,2 Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,3 Nordlab, Oulu University Hospital, Oulu, Finland
| | - R Bloigu
- 4 Medical Informatics and Statistics Research Group Oulu, University of Oulu, Oulu, Finland
| | - S Paju
- 5 Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - P Mäntylä
- 5 Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,6 Institute of Dentistry, University of Eastern Finland, Kuopio, Finland.,7 Kuopio University Hospital, Oral and Maxillofacial Diseases, Kuopio, Finland
| | - K Buhlin
- 5 Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,8 Division of Periodontology, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - J Sinisalo
- 9 HUCH Heart and Lung Center, Helsinki University Hospital, Helsinki, Finland
| | - P J Pussinen
- 5 Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - S Hörkkö
- 1 Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,2 Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,3 Nordlab, Oulu University Hospital, Oulu, Finland
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18
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Shen YH, Wang LY, Zhang BB, Hu QM, Wang P, He BQ, Bao GH, Liang JY, Wu FH. Ethyl Rosmarinate Protects High Glucose-Induced Injury in Human Endothelial Cells. Molecules 2018; 23:E3372. [PMID: 30572638 PMCID: PMC6321336 DOI: 10.3390/molecules23123372] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 11/29/2018] [Accepted: 12/18/2018] [Indexed: 11/17/2022] Open
Abstract
Ethyl rosmarinate (RAE) is one of the active constituents from Clinopodium chinense (Benth.) O. Kuntze, which is used for diabetic treatment in Chinese folk medicine. In this study, we investigated the protective effect of RAE on high glucose-induced injury in endothelial cells and explored its underlying mechanisms. Our results showed that both RAE and rosmarinic acid (RA) increased cell viability, decreased the production of reactive oxygen species (ROS), and attenuated high glucose-induced endothelial cells apoptosis in a dose-dependent manner, as evidenced by Hochest staining, Annexin V⁻FITC/PI double staining, and caspase-3 activity. RAE and RA both elevated Bcl-2 expression and reduced Bax expression, according to Western blot. We also found that LY294002 (phosphatidylinositol 3-kinase, or PI3K inhibitor) weakened the protective effect of RAE. In addition, PDTC (nuclear factor-κB, or NF-κB inhibitor) and SP600125 (c-Jun N-terminal kinase, or JNK inhibitor) could inhibit the apoptosis in endothelial cells caused by high glucose. Further, we demonstrated that RAE activated Akt, and the molecular docking analysis predicted that RAE showed more affinity with Akt than RA. Moreover, we found that RAE inhibited the activation of NF-κB and JNK. These results suggested that RAE protected endothelial cells from high glucose-induced apoptosis by alleviating reactive oxygen species (ROS) generation, and regulating the PI3K/Akt/Bcl-2 pathway, the NF-κB pathway, and the JNK pathway. In general, RAE showed greater potency than RA equivalent.
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Affiliation(s)
- Yan-Hui Shen
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
| | - Li-Ying Wang
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
| | - Bao-Bao Zhang
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
- Department of Natural Medicinal Chemistry, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
| | - Qi-Ming Hu
- Natural Products Laboratory, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China.
| | - Pu Wang
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
| | - Bai-Qiu He
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
| | - Guan-Hu Bao
- Natural Products Laboratory, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China.
| | - Jing-Yu Liang
- Department of Natural Medicinal Chemistry, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
| | - Fei-Hua Wu
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
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19
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Hardt U, Larsson A, Gunnarsson I, Clancy RM, Petri M, Buyon JP, Silverman GJ, Svenungsson E, Grönwall C. Autoimmune reactivity to malondialdehyde adducts in systemic lupus erythematosus is associated with disease activity and nephritis. Arthritis Res Ther 2018; 20:36. [PMID: 29482604 PMCID: PMC5827973 DOI: 10.1186/s13075-018-1530-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 01/30/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Immunoglobulin M (IgM) autoreactivity to malondialdehyde (MDA) protein modifications is part of the natural antibody repertoire in health and may have beneficial functions. In contrast, IgG anti-MDA are increased in chronic inflammation and autoimmunity and may instead have pathogenic properties. METHODS Herein, we investigated serum IgG anti-MDA levels by enzyme-linked immunosorbent assay (ELISA) in 398 systemic lupus erythematosus (SLE) patients in the Swedish Karolinska SLE cohort and compared these to findings in 225 US SLE patients from New York University and Johns Hopkins University. RESULTS In two independent cohorts, IgG anti-MDA levels correlated positively with disease activity by the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI; p < 0.0001, Spearman R = 0.3). Meta-analysis found an odds ratio of 2.7 (confidence interval (CI) 1.9-3.9; p < 0.0001) for high anti-MDA IgG levels with active disease (SLEDAI ≥ 6). Furthermore, IgG anti-MDA correlated directly with erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), soluble tumor necrosis factor receptors (sTNFR-1, sTNFR-2), and vascular cell adhesion molecule 1 (VCAM-1) measurements, and inversely with complement factors (C1q, C2, C3, C4). Importantly, IgG anti-MDA levels were significantly elevated in SLE patients with active nephritis (p = 0.0005) and correlated with cystatin C estimated glomerular filtration rate and albuminuria. CONCLUSIONS Elevated IgG anti-MDA in SLE patients was associated with high disease activity, with active lupus nephritis, and with biomarkers of systemic inflammation. This natural antibody reactivity may have potential prognostic utility, and may also actively contribute to pathogenesis.
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Affiliation(s)
- Uta Hardt
- Department of Medicine, Rheumatology Unit, Karolinska Institutet and Karolinska University Hospital, Center for Molecular Medicine, Stockholm, Sweden
| | - Anders Larsson
- Department of Medical Sciences, Clinical Chemistry, Uppsala University, Uppsala, Sweden
| | - Iva Gunnarsson
- Department of Medicine, Rheumatology Unit, Karolinska Institutet and Karolinska University Hospital, Center for Molecular Medicine, Stockholm, Sweden
| | - Robert M Clancy
- Department of Medicine, Division of Rheumatology, NYU School of Medicine, New York, NY, USA
| | - Michelle Petri
- Department of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jill P Buyon
- Department of Medicine, Division of Rheumatology, NYU School of Medicine, New York, NY, USA
| | - Gregg J Silverman
- Department of Medicine, Division of Rheumatology, NYU School of Medicine, New York, NY, USA
| | - Elisabet Svenungsson
- Department of Medicine, Rheumatology Unit, Karolinska Institutet and Karolinska University Hospital, Center for Molecular Medicine, Stockholm, Sweden
| | - Caroline Grönwall
- Department of Medicine, Rheumatology Unit, Karolinska Institutet and Karolinska University Hospital, Center for Molecular Medicine, Stockholm, Sweden.
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20
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Immunization with gingipain A hemagglutinin domain of Porphyromonas gingivalis induces IgM antibodies binding to malondialdehyde-acetaldehyde modified low-density lipoprotein. PLoS One 2018; 13:e0191216. [PMID: 29329335 PMCID: PMC5766137 DOI: 10.1371/journal.pone.0191216] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 12/29/2017] [Indexed: 12/12/2022] Open
Abstract
Treatment of periodontitis has beneficial effects on systemic inflammation markers that relate to progression of atherosclerosis. We aimed to investigate whether immunization with A hemagglutinin domain (Rgp44) of Porphyromonas gingivalis (Pg), a major etiologic agent of periodontitis, would lead to an antibody response cross-reacting with oxidized low-density lipoprotein (OxLDL) and how it would affect the progression of atherosclerosis in low-density lipoprotein receptor-deficient (LDLR-/-) mice. The data revealed a prominent IgM but not IgG response to malondialdehyde-acetaldehyde modified LDL (MAA-LDL) after Rgp44 and Pg immunizations, implying that Rgp44/Pg and MAA adducts may share cross-reactive epitopes that prompt IgM antibody production and consequently confer atheroprotection. A significant negative association was observed between atherosclerotic lesion and plasma IgA to Rgp44 in Rgp44 immunized mice, supporting further the anti-atherogenic effect of Rgp44 immunization. Plasma IgA levels to Rgp44 and to Pg in both Rgp44- and Pg-immunized mice were significantly higher than those in saline control, suggesting that IgA to Rgp44 could be a surrogate marker of immunization in Pg-immunized mice. Distinct antibody responses in plasma IgA levels to MAA-LDL, to Pg lipopolysaccharides (Pg-LPS), and to phosphocholine (PCho) were observed after Rgp44 and Pg immunizations, indicating that different immunogenic components between Rpg44 and Pg may behave differently in regard of their roles in the development of atherosclerosis. Immunization with Rgp44 also displayed atheroprotective features in modulation of plaque size through association with plasma levels of IL-1α whereas whole Pg bacteria achieved through regulation of anti-inflammatory cytokine levels of IL-5 and IL-10. The present study may contribute to refining therapeutic approaches aiming to modulate immune responses and inflammatory/anti-inflammatory processes in atherosclerosis.
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21
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Wang C, Kankaanpää J, Kummu O, Turunen SP, Akhi R, Bergmann U, Pussinen P, Remes AM, Hörkkö S. Characterization of a natural mouse monoclonal antibody recognizing epitopes shared by oxidized low-density lipoprotein and chaperonin 60 of Aggregatibacter actinomycetemcomitans. Immunol Res 2017; 64:699-710. [PMID: 26786003 DOI: 10.1007/s12026-015-8781-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Natural antibodies are predominantly antibodies of the IgM isotype present in the circulation of all vertebrates that have not been previously exposed to exogenous antigens. They are often directed against highly conserved epitopes and bind to ligands of varying chemical composition with low affinity. In this study we cloned and characterized a natural mouse monoclonal IgM antibody selected by binding to malondialdehyde acetaldehyde epitopes on low-density lipoprotein (LDL). Interestingly, the IgM antibody cross-reacted with Aggregatibacter actinomycetemcomitans (Aa) bacteria, a key pathogenic microbe in periodontitis reported to be associated with risk factor for atherosclerosis, thus being named as Aa_Mab. It is more intriguing that the binding molecule of Aa to Aa_Mab IgM was found to be Aa chaperonin 60 or HSP60, a member of heat-shock protein family, behaving not only as a chaperone for correct protein folding but also as a powerful virulence factor of the bacteria for inducing bone resorption and as a putative pathogenic factor in atherosclerosis. The findings will highlight the question of whether molecular mimicry between pathogen components and oxidized LDL could lead to atheroprotective immune activity, and also would be of great importance in potential application of immune response-based preventive and therapeutic strategies against atherosclerosis and periodontal disease.
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Affiliation(s)
- Chunguang Wang
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Oulu, Finland. .,Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland.
| | - Jari Kankaanpää
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland.,Department of Neurology, Oulu University Hospital, Oulu, Finland.,Research Unit of Clinical Neuroscience and Medical Research Center Oulu, University of Oulu, Oulu, Finland
| | - Outi Kummu
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland
| | - S Pauliina Turunen
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland.,Genome-scale Biology Research Program, University of Helsinki, Helsinki, Finland
| | - Ramin Akhi
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland.,Research Unit of Oral Health Sciences, University of Oulu, Oulu, Finland
| | - Ulrich Bergmann
- Protein Analysis Core Facility, Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Pirkko Pussinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Anne M Remes
- Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland.,Department of Neurology, Kuopio University Hospital, Kuopio, Finland
| | - Sohvi Hörkkö
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland
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22
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Nguyen TTT, Baumgarth N. Natural IgM and the Development of B Cell-Mediated Autoimmune Diseases. Crit Rev Immunol 2017; 36:163-177. [PMID: 27910766 DOI: 10.1615/critrevimmunol.2016018175] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Most serum immunoglobulin M (IgM) is "natural IgM", which is produced apparently spontaneously by a distinct subset of B cells requiring no exogenous antigenic or microbial stimuli. Natural IgM is an evolutionarily conserved molecule and reacts with a variety of epitopes expressed on both self- and non-self antigens. It has long been understood that secreted (s) IgM contributes to the removal of altered self-antigens, such as apoptotic and dying cells. As we outline in this review, it is thought that this sIgM housekeeping function removes potential triggers of autoresponse induction. However, we recently demonstrated an unexpected and distinct role for sIgM in the control of autoreactive B cells: the regulation of bone marrow B cell development. The absence of sIgM blocked pro- to pre- B-cell transition and greatly altered the BCR repertoire of the developing B cells and the peripheral B-cell pools in genetically engineered mice. This finding strongly suggests that IgM is critical for B-cell central tolerance induction. Given that treatment of sIgM-deficient mice with polyclonal IgM corrected these developmental defects, therapeutic application of IgM could be of clinical relevance in the treatment of some B-cell-mediated autoimmune diseases.
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Affiliation(s)
- Trang T T Nguyen
- Center for Comparative Medicine, Graduate Group in Immunology, University of California, Davis, Davis, CA 95616, USA
| | - Nicole Baumgarth
- Center for Comparative Medicine, Graduate Group in Immunology, and Dept. Pathology, Microbiology & Immunology, University of California, Davis, Davis, CA 95616, USA
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23
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Warnecke A, Abele S, Musunuri S, Bergquist J, Harris RA. Scavenger Receptor A Mediates the Clearance and Immunological Screening of MDA-Modified Antigen by M2-Type Macrophages. Neuromolecular Med 2017; 19:463-479. [PMID: 28828577 PMCID: PMC5683054 DOI: 10.1007/s12017-017-8461-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 08/10/2017] [Indexed: 01/20/2023]
Abstract
In this study, we investigated the uptake of malondialdehyde (MDA)-modified myelin oligodendrocyte glycoprotein (MOG) in the context of lipid peroxidation and its implications in CNS autoimmunity. The use of custom-produced fluorescently labeled versions of MOG or MDA-modified MOG enabled us to study and quantify the uptake by different macrophage populations and to identify the responsible receptor, namely SRA. The SRA-mediated uptake of MDA-modified MOG is roughly tenfold more efficient compared to that of the native form. Notably, this uptake is most strongly associated with anti-inflammatory M2-type macrophages. MDA-modified MOG was demonstrated to be resistant to degradation by lysine-dependent proteases in vitro, but the overall digestion fragments appeared to be similar in cell lysates, although their relative abundance appeared to be altered as a result of faster uptake. Accordingly, MDA-modified MOG is processed for presentation by APCs, allowing maximized recall proliferation of MOG35-55-specific 2D2 T cells in vitro due to higher uptake. However, MDA modification of MOG did not enhance immune priming or disease course in the in vivo MOG-EAE model, but did induce antibody responses to both MOG and MDA adducts. Taken together our results indicate that MDA adducts primarily constitute clearance signals for phagocytes and promote rapid removal of antigen, which is subjected to immunological screening by previously licensed T cells.
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MESH Headings
- Animals
- Autoantigens/immunology
- Autoantigens/metabolism
- Cells, Cultured
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/metabolism
- Inflammation
- Lipid Peroxidation
- Lymphocyte Activation
- Macrophages/classification
- Macrophages/immunology
- Macrophages/metabolism
- Malondialdehyde/immunology
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Myelin-Oligodendrocyte Glycoprotein/immunology
- Myelin-Oligodendrocyte Glycoprotein/metabolism
- Peptide Fragments/immunology
- Peptide Fragments/metabolism
- Peptide Hydrolases/metabolism
- Proteolysis
- RAW 264.7 Cells
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/immunology
- Recombinant Proteins/immunology
- Recombinant Proteins/metabolism
- Scavenger Receptors, Class A/physiology
- T-Lymphocytes/immunology
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Affiliation(s)
- Andreas Warnecke
- Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital at Solna, 17176, Stockholm, Sweden
| | - Sonja Abele
- Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital at Solna, 17176, Stockholm, Sweden
| | - Sravani Musunuri
- Department of Chemistry-BMC, Analytical Chemistry and Science for Life Laboratory, Uppsala University, Box 599, 751 24, Uppsala, Sweden
| | - Jonas Bergquist
- Department of Chemistry-BMC, Analytical Chemistry and Science for Life Laboratory, Uppsala University, Box 599, 751 24, Uppsala, Sweden
| | - Robert A Harris
- Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital at Solna, 17176, Stockholm, Sweden.
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24
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Wennerås C, Goldblatt D, Zancolli M, Mattsson M, Wass L, Hörkkö S, Rosén A. Natural IgM antibodies in the immune defence against neoehrlichiosis. Infect Dis (Lond) 2017; 49:809-816. [PMID: 28682152 DOI: 10.1080/23744235.2017.1347815] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Neoehrlichiosis is an infectious disease caused by the tick-borne bacterium "Candidatus Neoehrlichia mikurensis". Splenectomy and rituximab therapies are risk factors for severe neoehrlichiosis. Our aim was to examine if neoehrlichiosis patients had low levels of natural IgM antibodies and/or were hypogammaglobulinemic, and if such deficiencies were associated with asplenia and vascular complications. METHODS Neoehrlichiosis patients (n = 9) and control subjects (n = 10) were investigated for serum levels of IgG, IgA, and IgM, and for levels of natural IgM antibodies to pneumococcal polysaccharides (6B, 14), and to the malondialdehyde acetaldehyde epitope of oxidized LDL. The multivariate method Projection to Latent Structures was used to analyze the data. RESULTS The levels of natural IgM antibodies of various specificities were decreased or not measurable in half of the studied patients with neoehrlichiosis. Only one patient and one control subject were hypogammaglobulinemic. An inverse relationship was noted between the levels of natural IgM antibodies and the development of deep vein thrombosis. Unexpectedly, no association was seen between having or not having a spleen and the levels of natural IgM antibody levels in the circulation. CONCLUSIONS Neither hypogammaglobulinemia nor lack of natural IgM antibodies alone predisposes for severe neoehrlichiosis. The importance of the spleen in the immune defence against Ca. N. mikurensis probably lies in its capacity to generate or maintain specific antibodies.
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Affiliation(s)
- Christine Wennerås
- a Department of Infectious Diseases and Hematology , Sahlgrenska Academy, University of Gothenburg , Göteborg , Sweden
| | - David Goldblatt
- b Immunobiology Section , Great Ormond Street Institute of Child Health, University College London , London , UK
| | - Marta Zancolli
- b Immunobiology Section , Great Ormond Street Institute of Child Health, University College London , London , UK
| | - Mattias Mattsson
- c Department of Hematology , Uppsala University Hospital , Uppsala , Sweden
| | - Linda Wass
- a Department of Infectious Diseases and Hematology , Sahlgrenska Academy, University of Gothenburg , Göteborg , Sweden
| | - Sohvi Hörkkö
- d Department of Medical Microbiology and Immunology , Medical Research Center University of Oulu, and Nordlab Oulu, Oulu University Hospital , Oulu , Finland
| | - Anders Rosén
- e Department of Clinical and Experimental Medicine , Linköping University , Linköping , Sweden
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25
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Dugovich BS, Peel MJ, Palmer AL, Zielke RA, Sikora AE, Beechler BR, Jolles AE, Epps CW, Dolan BP. Detection of bacterial-reactive natural IgM antibodies in desert bighorn sheep populations. PLoS One 2017; 12:e0180415. [PMID: 28662203 PMCID: PMC5491220 DOI: 10.1371/journal.pone.0180415] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Accepted: 05/29/2017] [Indexed: 12/25/2022] Open
Abstract
Ecoimmunology is a burgeoning field of ecology which studies immune responses in wildlife by utilizing general immune assays such as the detection of natural antibody. Unlike adaptive antibodies, natural antibodies are important in innate immune responses and often recognized conserved epitopes present in pathogens. Here, we describe a procedure for measuring natural antibodies reactive to bacterial antigens that may be applicable to a variety of organisms. IgM from desert bighorn sheep plasma samples was tested for reactivity to outer membrane proteins from Vibrio coralliilyticus, a marine bacterium to which sheep would have not been exposed. Immunoblotting demonstrated bighorn sheep IgM could bind to a variety of bacterial cell envelope proteins while ELISA analysis allowed for rapid determination of natural antibody levels in hundreds of individual animals. Natural antibody levels were correlated with the ability of plasma to kill laboratory strains of E. coli bacteria. Finally, we demonstrate that natural antibody levels varied in two distinct populations of desert bighorn sheep. These data demonstrate a novel and specific measure of natural antibody function and show that this varies in ecologically relevant ways.
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Affiliation(s)
- Brian S. Dugovich
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, United States of America
| | - Melanie J. Peel
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, United States of America
| | - Amy L. Palmer
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, United States of America
| | - Ryszard A. Zielke
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, United States of America
| | - Aleksandra E. Sikora
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, United States of America
| | - Brianna R. Beechler
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, United States of America
| | - Anna E. Jolles
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, United States of America
| | - Clinton W. Epps
- Department of Fisheries and Wildlife, College of Agricultural Sciences, Oregon State University, Corvallis, Oregon, United States of America
| | - Brian P. Dolan
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, United States of America
- * E-mail:
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26
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Akhi R, Wang C, Kyrklund M, Kummu O, Turunen SP, Hyvärinen K, Kullaa A, Salo T, Pussinen PJ, Hörkkö S. Cross-reactive saliva IgA antibodies to oxidized LDL and periodontal pathogens in humans. J Clin Periodontol 2017; 44:682-691. [PMID: 28548243 DOI: 10.1111/jcpe.12748] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2017] [Indexed: 02/02/2023]
Abstract
AIM Oxidized low-density lipoproteins (oxLDL) are formed as a result of lipid peroxidation and are highly immunogenic and proatherogenic. In this study, saliva antibodies binding to oxLDL, Porphyromonas gingivalis (Pg) and Aggregatibacter actinomycetemcomitans (Aa) were characterized and their cross-reactivity was evaluated. MATERIALS AND METHODS Resting and stimulated saliva samples were collected from 36 healthy adults (mean age 26 years). Saliva IgA, IgG and IgM autoantibody levels to copper oxidized LDL (CuOx-LDL) and malondialdehyde acetaldehyde-modified LDL (MAA-LDL) were determined with chemiluminescence immunoassay. RESULTS Saliva IgA and IgG antibodies binding to MAA-LDL and CuOx-LDL were detected in all samples and they were associated with the saliva levels of IgA and IgG to P. gingivalis and A. actinomycetemcomitans. Competitive immunoassay showed that saliva antibodies to MAA-LDL cross-reacted specifically with P. gingivalis. The autoantibody levels to oxLDL in saliva were not associated with the autoantibody levels to oxLDL in plasma or with saliva apolipoprotein B 100 levels. CONCLUSIONS Saliva contains IgA and IgG binding to oxLDL, which showed cross-reactive properties with the periodontal pathogens Porphyromonas gingivalis (P.g). The data suggest that secretory IgA to P.g may participate in immune reactions involved in LDL oxidation through molecular mimicry.
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Affiliation(s)
- Ramin Akhi
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,Nordlab, Oulu University Hospital, Oulu, Finland.,Research Unit of Oral Health Sciences, University of Oulu, Oulu, Finland
| | - Chunguang Wang
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,Nordlab, Oulu University Hospital, Oulu, Finland
| | - Mikael Kyrklund
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,Nordlab, Oulu University Hospital, Oulu, Finland
| | - Outi Kummu
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,Nordlab, Oulu University Hospital, Oulu, Finland
| | - Sini Pauliina Turunen
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,Research Programs Unit, Genome-Scale Biology, University of Helsinki, Helsinki, Finland
| | - Kati Hyvärinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Arja Kullaa
- Research Unit of Oral Health Sciences, University of Oulu, Oulu, Finland
| | - Tuula Salo
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,Cancer Research and Translational Medicine Research Unit, University of Oulu, Oulu, Finland
| | - Pirkko J Pussinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Sohvi Hörkkö
- Medical Microbiology and Immunology, Research Unit of Biomedicine, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland.,Nordlab, Oulu University Hospital, Oulu, Finland
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27
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Grönwall C, Amara K, Hardt U, Krishnamurthy A, Steen J, Engström M, Sun M, Ytterberg AJ, Zubarev RA, Scheel-Toellner D, Greenberg JD, Klareskog L, Catrina AI, Malmström V, Silverman GJ. Autoreactivity to malondialdehyde-modifications in rheumatoid arthritis is linked to disease activity and synovial pathogenesis. J Autoimmun 2017. [PMID: 28647488 DOI: 10.1016/j.jaut.2017.06.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Oxidation-associated malondialdehyde (MDA) modification of proteins can generate immunogenic neo-epitopes that are recognized by autoantibodies. In health, IgM antibodies to MDA-adducts are part of the natural antibody pool, while elevated levels of IgG anti-MDA antibodies are associated with inflammatory and autoimmune conditions. Yet, in human autoimmune disease IgG anti-MDA responses have not been well characterized and their potential contribution to disease pathogenesis is not known. Here, we investigate MDA-modifications and anti-MDA-modified protein autoreactivity in rheumatoid arthritis (RA). While RA is primarily associated with autoreactivity to citrullinated antigens, we also observed increases in serum IgG anti-MDA in RA patients compared to controls. IgG anti-MDA levels significantly correlated with disease activity by DAS28-ESR and serum TNF-alpha, IL-6, and CRP. Mass spectrometry analysis of RA synovial tissue identified MDA-modified proteins and revealed shared peptides between MDA-modified and citrullinated actin and vimentin. Furthermore, anti-MDA autoreactivity among synovial B cells was discovered when investigating recombinant monoclonal antibodies (mAbs) cloned from single B cells, and 3.5% of memory B cells and 2.3% of plasma cells were found to be anti-MDA positive. Several clones were highly specific for MDA-modification with no cross-reactivity to other antigen modifications such as citrullination, carbamylation or 4-HNE-carbonylation. The mAbs recognized MDA-adducts in a variety of proteins including albumin, histone 2B, fibrinogen and vimentin. Interestingly, the most reactive clone, originated from an IgG1-bearing memory B cell, was encoded by near germline variable genes, and showed similarity to previously reported natural IgM. Other anti-MDA clones display somatic hypermutations and lower reactivity. Importantly, these anti-MDA antibodies had significant in vitro functional properties and induced enhanced osteoclastogenesis, while the natural antibody related high-reactivity clone did not. We postulate that these may represent distinctly different facets of anti-MDA autoreactive responses.
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Affiliation(s)
- Caroline Grönwall
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden; Division of Rheumatology, Department of Medicine, NYU School of Medicine, New York, NY, USA.
| | - Khaled Amara
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Uta Hardt
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Akilan Krishnamurthy
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Johanna Steen
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Marianne Engström
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Meng Sun
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - A Jimmy Ytterberg
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden; Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Roman A Zubarev
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Dagmar Scheel-Toellner
- Rheumatology Research Group, Centre for Translational Inflammation Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Jeffrey D Greenberg
- Division of Rheumatology, Department of Medicine, NYU School of Medicine, New York, NY, USA
| | - Lars Klareskog
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Anca I Catrina
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Vivianne Malmström
- Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Gregg J Silverman
- Division of Rheumatology, Department of Medicine, NYU School of Medicine, New York, NY, USA
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28
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Lassenius MI, Fogarty CL, Blaut M, Haimila K, Riittinen L, Paju A, Kirveskari J, Järvelä J, Ahola AJ, Gordin D, Härma MA, Kumar A, Hamarneh SR, Hodin RA, Sorsa T, Tervahartiala T, Hörkkö S, Pussinen PJ, Forsblom C, Jauhiainen M, Taskinen MR, Groop PH, Lehto M. Intestinal alkaline phosphatase at the crossroad of intestinal health and disease - a putative role in type 1 diabetes. J Intern Med 2017; 281:586-600. [PMID: 28393441 DOI: 10.1111/joim.12607] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Patients with type 1 diabetes have shown an increase in circulating cytokines, altered lipoprotein metabolism and signs of vascular dysfunction in response to high-fat meals. Intestinal alkaline phosphatase (IAP) regulates lipid transport and inflammatory responses in the gastrointestinal tract. We therefore hypothesized that changes in IAP activity could have profound effects on gut metabolic homeostasis in patients with type 1 diabetes. METHODS Faecal samples of 41 nondiabetic controls and 46 patients with type 1 diabetes were analysed for IAP activity, calprotectin, immunoglobulins and short-chain fatty acids (SCFAs). The impact of oral IAP supplementation on intestinal immunoglobulin levels was evaluated in C57BL/6 mice exposed to high-fat diet for 11 weeks. RESULTS Patients with type 1 diabetes exhibited signs of intestinal inflammation. Compared to controls, patients with diabetes had higher faecal calprotectin levels, lower faecal IAP activities accompanied by lower propionate and butyrate concentrations. Moreover, the amount of faecal IgA and the level of antibodies binding to oxidized LDL were decreased in patients with type 1 diabetes. In mice, oral IAP supplementation increased intestinal IgA levels markedly. CONCLUSION Deprivation of protective intestinal factors may increase the risk of inflammation in the gut - a phenomenon that seems to be present already in patients with uncomplicated type 1 diabetes. Low levels of intestinal IgA and antibodies to oxidized lipid epitopes may predispose such patients to inflammation-driven complications such as cardiovascular disease and diabetic nephropathy. Importantly, oral IAP supplementation could have beneficial therapeutic effects on gut metabolic homeostasis, possibly through stimulation of intestinal IgA secretion.
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Affiliation(s)
- M I Lassenius
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
| | - C L Fogarty
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
| | - M Blaut
- Department of Gastrointestinal Microbiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | - K Haimila
- Blood Group Unit, Finnish Red Cross Blood Service, Helsinki, Finland
| | - L Riittinen
- Helsinki University Central Hospital, HUSLAB, Helsinki, Finland
| | - A Paju
- Helsinki University Central Hospital, HUSLAB, Helsinki, Finland
| | - J Kirveskari
- Department of Bacteriology, HUSLAB, Helsinki, Finland
| | - J Järvelä
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
| | - A J Ahola
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
| | - D Gordin
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
| | - M-A Härma
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
| | - A Kumar
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
| | - S R Hamarneh
- Department of Surgery, Harvard Medical School, Massachusetts General Hospital, Boston, MA, USA
| | - R A Hodin
- Department of Surgery, Harvard Medical School, Massachusetts General Hospital, Boston, MA, USA
| | - T Sorsa
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Division of Periodontology, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - T Tervahartiala
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - S Hörkkö
- Medical Microbiology and Immunology, Unit of Biomedicine, University of Oulu, Oulu, Finland
- Medical Research Center, Nordlab Oulu University Hospital and University of Oulu, Oulu, Finland
| | - P J Pussinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - C Forsblom
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
| | - M Jauhiainen
- Genomics and Biomarkers Unit, National Institute for Health and Welfare, Helsinki, Finland
| | - M-R Taskinen
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
| | - P-H Groop
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
- Baker IDI Heart & Diabetes Institute, Melbourne, Vic, Australia
| | - M Lehto
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
- Abdominal Center of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
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29
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Shimomoto T, Collins LB, Yi X, Holley DW, Zhang Z, Tian X, Uchida K, Wang C, Hörkkö S, Willis MS, Gold A, Bultman SJ, Nakamura J. A purified MAA-based ELISA is a useful tool for determining anti-MAA antibody titer with high sensitivity. PLoS One 2017; 12:e0172172. [PMID: 28222187 PMCID: PMC5319763 DOI: 10.1371/journal.pone.0172172] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 01/31/2017] [Indexed: 01/01/2023] Open
Abstract
Atherosclerosis is widely accepted to be a chronic inflammatory disease, and the immunological response to the accumulation of LDL is believed to play a critical role in the development of this disease. 1,4-Dihydropyridine-type MAA-adducted LDL has been implicated in atherosclerosis. Here, we have demonstrated that pure MAA-modified residues can be chemically conjugated to large proteins without by-product contamination. Using this pure antigen, we established a purified MAA-ELISA, with which a marked increase in anti-MAA antibody titer was determined at a very early stage of atherosclerosis in 3-month ApoE-/- mice fed with a normal diet. Our methods of Nε-MAA-L-lysine purification and purified antigen-based ELISA will be easily applicable for biomarker-based detection of early stage atherosclerosis in patients, as well as for the development of an adduct-specific Liquid Chromatography/Mass Spectrometry-based quantification of physiological and pathological levels of MAA.
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Affiliation(s)
- Takasumi Shimomoto
- Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Leonard B. Collins
- Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Xianwen Yi
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Darcy W. Holley
- Department of Genetics, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Zhenfa Zhang
- Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Xu Tian
- Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Koji Uchida
- School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Chunguang Wang
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland
| | - Sohvi Hörkkö
- Medical Microbiology and Immunology, Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center and Nordlab Oulu, University Hospital and University of Oulu, Oulu, Finland
| | - Monte S. Willis
- Department of Pathology & Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
- McAllister Heart Institute, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Avram Gold
- Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Scott J. Bultman
- Department of Genetics, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Jun Nakamura
- Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina, United States of America
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30
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Natural Monoclonal Antibody to Oxidized Low-Density Lipoprotein and Aggregatibacter actinomycetemcomitans. Methods Mol Biol 2017; 1643:155-167. [PMID: 28667536 DOI: 10.1007/978-1-4939-7180-0_12] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Natural antibodies are produced by B lymphocytes without exogenous antigenic exposure and are present at the time of birth. They usually bind to conserved epitopes on antigens of different chemical compositions. We cloned and characterized a natural mouse monoclonal IgM antibody (Aa_Mab) by selecting the binding to malondialdehyde acetaldehyde (MAA) adducts on low-density lipoprotein (LDL). The data showed that the Aa_Mab cross-reacted with Aggregatibacter actinomycetemcomitans (Aa) bacteria, an important oral pathogen in periodontitis associated with atherosclerosis. Surprisingly, the binding molecule of Aa bacteria to the Aa_Mab was Aa chaperonin 60 or HSP60, a protein that is not only responsible for maintaining cellular proteins conformation, but also functions as a potent virulence factor prompting bone resorption in periodontitis and as a putative pathogenic factor in atherosclerosis.
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31
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Born WK, Huang Y, Zeng W, Torres RM, O'Brien RL. A Special Connection between γδ T Cells and Natural Antibodies? Arch Immunol Ther Exp (Warsz) 2016; 64:455-462. [PMID: 27235134 PMCID: PMC5507014 DOI: 10.1007/s00005-016-0403-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 04/04/2016] [Indexed: 12/15/2022]
Abstract
Natural antibodies (NAbs) play an important role in early host defense, autophagy and tissue remodeling, and in immune regulation. They arise spontaneously (without specific immunization), and are already present at birth. NAbs are produced by B1 B cells, MZ B cells and other B cell types. They include all major Ig subclasses but IgM antibodies are prevalent, especially early in development. NAbs may be poly-specific, recognize particular auto-antigens, or detect neo-determinants such as those exposed during apoptosis or generated by oxidation. NAbs do not require cognate T cell help but depend on soluble mediators produced by T cells. Our recent studies suggest that γδ T cells may have a special relationship with NAbs, and play a prominent role in their regulation, in part through the fine-tuning of IL-4 levels. The spontaneously activated state of these cells likely enables their cytokine production and other functions in the absence of external stimulation. Ontogenetically, the earlier arising γδ T cells are better positioned than αβ T cells to shape the developing repertoire of NAbs. Intriguingly, ligand specificities of NAbs and γδ T cell receptors appear to be overlapping, perhaps allowing γδ cognate help for certain NAb specificities. Via NAbs, γδ T cells could exert a regulatory influence on numerous processes in health and disease.
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Affiliation(s)
- Willi K Born
- Department of Biomedical Research, National Jewish Health, 1400 Jackson Str., Denver, CO, 80206, USA.
- Department of Immunology and Microbiology, University of Colorado Health Sciences Center, Aurora, CO, USA.
| | - Yafei Huang
- Joint Laboratory for Stem Cell Engineering and Technology Transfer, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
| | - Wanjiang Zeng
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Raul M Torres
- Department of Immunology and Microbiology, University of Colorado Health Sciences Center, Aurora, CO, USA
| | - Rebecca L O'Brien
- Department of Biomedical Research, National Jewish Health, 1400 Jackson Str., Denver, CO, 80206, USA
- Department of Immunology and Microbiology, University of Colorado Health Sciences Center, Aurora, CO, USA
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32
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Impact of parental obesity on neonatal markers of inflammation and immune response. Int J Obes (Lond) 2016; 41:30-37. [PMID: 27780976 PMCID: PMC5209273 DOI: 10.1038/ijo.2016.187] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 08/25/2016] [Accepted: 09/25/2016] [Indexed: 12/11/2022]
Abstract
Background/Objectives Maternal obesity may influence neonatal and childhood morbidities through increased inflammation and/or altered immune response. Less is known about paternal obesity. We hypothesized that excessive parental weight contributes to elevated inflammation and altered immunoglobulin (Ig) profiles in neonates. Subjects/Methods In the Upstate KIDS Study maternal pre-pregnancy body mass index (BMI) was obtained from vital records and paternal BMI from maternal report. Biomarkers were measured from newborn dried blood spots (DBS) among neonates whose parents provided consent. Inflammatory scores were calculated by assigning one point for each of 5 pro-inflammatory biomarkers above the median and one point for an anti-inflammatory cytokine below the median. Linear regression models and generalized estimating equations were used to estimate mean differences (β) and 95% confidence intervals (CI) in the inflammatory score and Ig levels by parental overweight/obesity status compared to normal weight. Results Among 2974 pregnancies, 51% were complicated by excessive maternal weight (BMI>25), 73% by excessive paternal weight, and 28% by excessive gestational weight gain. Maternal BMI categories of overweight (BMI 25.0-29.9) and obese class II/III (BMI≥35) were associated with increased neonatal inflammation scores (β=0.12, 95% CI: 0.02, 0.21; p=0.02, and β=0.13, CI: −0.002, 0.26; p=0.05, respectively) but no increase was observed in the obese class I group (BMI 30-34.9). Mothers with class I and class II/III obesity had newborns with increased IgM levels (β=0.11, CI: 0.04, 0.17; p=0.001 and β=0.12, CI: 0.05, 0.19); p<0.001, respectively). Paternal groups of overweight, obese class I and obese class II/III had decreased neonatal IgM levels (β=−0.08, CI: −0.13,-0.03, p=0.001; β=−0.07, CI: −0.13, −0.01, p=0.029 and β=−0.11, CI:−0.19,-0.04, p=0.003, respectively). Conclusions Excessive maternal weight was generally associated with increased inflammation and IgM supporting previous observations of maternal obesity and immune dysregulation in offspring. The role of paternal obesity requires further study.
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McGaha TL, Karlsson MCI. Apoptotic cell responses in the splenic marginal zone: a paradigm for immunologic reactions to apoptotic antigens with implications for autoimmunity. Immunol Rev 2016; 269:26-43. [PMID: 26683143 DOI: 10.1111/imr.12382] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Apoptotic cells drive innate regulatory responses that result in tolerogenic immunity. This is a critical aspect of cell physiology as apoptotic cells expose potentially dangerous nuclear antigens on the surface in apoptotic blebs, and failure in their recognition, phagocytosis, or destruction can cause dramatic autoimmunity in experimental models and is linked to development and progression of systemic pathology in human. The marginal zone is a specialized splenic environment that serves as a transitional site from circulation to peripheral lymphoid structures. The marginal zone serves a key role in trapping of particulates and initiation of innate responses against systemic microbial pathogens. However in recent years, it has become clear the marginal zone is also important for initiation of immune tolerance to apoptotic cells, driving a coordinated response involving multiple phagocyte and lymphocyte subsets. Recent reports linking defects in splenic macrophage function to systemic lupus erythematosus in a manner analogous to marginal zone macrophages in lupus-prone mice provide an impetus to better understand the mechanistic basis of the apoptotic cell response in the marginal zone and its general applicability to apoptotic cell-driven tolerance at other tissue sites. In this review, we discuss immune responses to apoptotic cells in the spleen in general and the marginal zone in particular, the relationship of these responses to autoimmune disease, and comparisons to apoptotic cell immunity in humans.
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Affiliation(s)
- Tracy L McGaha
- Department of Immunology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.,Princess Margaret Cancer Center, University Health Network, Toronto, ON, Canada
| | - Mikael C I Karlsson
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, Stockholm, Sweden
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Sinningen K, Thiele S, Hofbauer LC, Rauner M. Role of milk fat globule-epidermal growth factor 8 in osteoimmunology. BONEKEY REPORTS 2016; 5:820. [PMID: 27579162 DOI: 10.1038/bonekey.2016.52] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 06/06/2016] [Indexed: 11/09/2022]
Abstract
Milk fat globule-epidermal growth factor 8 (MFG-E8) is a glycoprotein that is abundantly expressed in various tissues and has a pivotal role in the phagocytic clearance of apoptotic cells. However, MFG-E8 has also gained significant attention because of its wide range of functions in autoimmunity, inflammation and tissue homeostasis. More recently, MFG-E8 has been identified as a critical regulator of bone homeostasis, being expressed in both, osteoblasts and osteoclasts. In addition, it was shown that MFG-E8 fulfils an active role in modulating inflammatory processes, suggesting an anti-inflammatory role of MFG-E8 and proposing it as a novel therapeutic target for inflammatory diseases. This concise review focusses on the expression and regulation of MFG-E8 in the context of inflammatory bone diseases, highlights its role in the pathophysiology of osteoimmune diseases and discusses the therapeutic potential of MFG-E8.
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Affiliation(s)
- Kathrin Sinningen
- Department of Obstetrics and Gynecology, Heinrich Heine University Düsseldorf , Düsseldorf, Germany
| | - Sylvia Thiele
- Department of Medicine III, Division of Endocrinology, Diabetes, and Bone Diseases, Technische Universität Dresden , Dresden, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III, Division of Endocrinology, Diabetes, and Bone Diseases, Technische Universität Dresden, Dresden, Germany; DFG Research Center for Regenerative Therapies Dresden, Dresden, Germany
| | - Martina Rauner
- Department of Medicine III, Division of Endocrinology, Diabetes, and Bone Diseases, Technische Universität Dresden , Dresden, Germany
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Grönwall C, Clancy RM, Getu L, Lloyd KA, Siegel DL, Reed JH, Buyon JP, Silverman GJ. Modulation of natural IgM autoantibodies to oxidative stress-related neo-epitopes on apoptotic cells in newborns of mothers with anti-Ro autoimmunity. J Autoimmun 2016; 73:30-41. [PMID: 27289167 DOI: 10.1016/j.jaut.2016.05.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/26/2016] [Accepted: 05/31/2016] [Indexed: 11/17/2022]
Abstract
At birth, the human immune system already contains substantial levels of polymeric IgM, that include autoantibodies to neo-epitopes on apoptotic cells (ACs) that are proposed to play homeostatic and anti-inflammatory roles. Yet the biologic origins and developmental regulation of these naturally arising antibodies remain poorly understood. Herein, we report that levels of IgM-antibodies to malondialdehyde (MDA) protein adducts, a common type of in vivo generated oxidative stress-related neoepitope, directly correlate with the relative binding of neonatal-IgM to ACs. Levels of IgM to phosphorylcholine (PC), a natural antibody prevalent in adults, were relatively scant in cord blood, while there was significantly greater relative representation of IgM anti-MDA antibodies in newborns compared to adults. To investigate the potential interrelationships between neonatal IgM with pathogenic IgG-autoantibodies, we studied 103 newborns born to autoimmune mothers with IgG anti-Ro (i.e., 70 with neonatal lupus and 33 without neonatal lupus). In these subjects the mean levels of IgM anti-Ro60 were significantly higher than in the newborns from non-autoimmune mothers. In contrast, levels of IgM anti-MDA in IgG anti-Ro exposed neonates were significantly lower than in neonates from non-autoimmune mothers. The presence or absence of neonatal lupus did not appear to influence the total levels of IgM in the anti-Ro exposed newborns. Taken together, our studies provide evidence that the immune development of the natural IgM-repertoire may be affected, and become imprinted by, the transfer of maternal IgG into the fetus.
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Affiliation(s)
- Caroline Grönwall
- Department of Medicine, Division of Rheumatology, New York University School of Medicine, New York, NY 10016, USA; Department of Medicine, Unit of Rheumatology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Robert M Clancy
- Department of Medicine, Division of Rheumatology, New York University School of Medicine, New York, NY 10016, USA
| | - Lelise Getu
- Department of Medicine, Division of Rheumatology, New York University School of Medicine, New York, NY 10016, USA
| | - Katy A Lloyd
- Department of Medicine, Unit of Rheumatology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Don L Siegel
- Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine & Therapeutic Pathology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Joanne H Reed
- Department of Medicine, Division of Rheumatology, New York University School of Medicine, New York, NY 10016, USA
| | - Jill P Buyon
- Department of Medicine, Division of Rheumatology, New York University School of Medicine, New York, NY 10016, USA
| | - Gregg J Silverman
- Department of Medicine, Division of Rheumatology, New York University School of Medicine, New York, NY 10016, USA.
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Rother MB, Schreurs MWJ, Kroek R, Bartol SJW, van Dongen JJM, van Zelm MC. The Human Thymus Is Enriched for Autoreactive B Cells. THE JOURNAL OF IMMUNOLOGY 2016; 197:441-8. [DOI: 10.4049/jimmunol.1501992] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 05/06/2016] [Indexed: 01/26/2023]
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Rothstein TL. Natural Antibodies as Rheostats for Susceptibility to Chronic Diseases in the Aged. Front Immunol 2016; 7:127. [PMID: 27092140 PMCID: PMC4823301 DOI: 10.3389/fimmu.2016.00127] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 03/21/2016] [Indexed: 02/06/2023] Open
Abstract
Natural antibodies are spontaneously produced in the absence of infection or immunization, and are both anti-microbial and autoreactive. Autoreactive natural antibodies can bind noxious molecules, such as those involved in clinical situations of atherosclerosis (oxLDL), malignancy (NGcGM3), and neurodegeneration (amyloid, tau) and can affect the fate of their targets or the cells bearing them to maintain homeostasis. Clinically relevant natural antibodies have been shown to decline with advancing age in those few situations where measurements have been made. Consistent with this, human B-1 cells that are thought to be responsible for generating natural antibodies also decline with advancing age. These findings together suggest that an age-related decline in amount or efficacy of homeostatic natural antibodies is associated with relative loss of protection against molecules involved in several diseases whose incidence rises in the older age population, and that those individuals experiencing greatest loss are at greatest risk. In this view, natural antibodies act as rheostats for susceptibility to several age-related diseases. These considerations suggest that administration of natural antibodies, or of factors that maintain B-1 cells and/or enhance production of natural antibodies by B-1 cells, may serve to counteract the onset or progression of age-related chronic illness.
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Affiliation(s)
- Thomas L Rothstein
- Center for Oncology and Cell Biology, The Feinstein Institute for Medical Research , Manhasset, NY , USA
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38
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Gaciarz A, Veijola J, Uchida Y, Saaranen MJ, Wang C, Hörkkö S, Ruddock LW. Systematic screening of soluble expression of antibody fragments in the cytoplasm of E. coli. Microb Cell Fact 2016; 15:22. [PMID: 26809624 PMCID: PMC4727284 DOI: 10.1186/s12934-016-0419-5] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 01/11/2016] [Indexed: 12/21/2022] Open
Abstract
Background Disulfide bonds are the most common structural, post-translational modification found in proteins. Antibodies contain up to 25 disulfide bonds depending on type, with scFv fragments containing two disulfides and Fab fragments containing five or six disulfide bonds. The production of antibody fragments that contain native disulfide bonds can be challenging, especially on a large scale. The protein needs to be targeted to prokaryotic periplasm or the eukaryotic endoplasmic reticulum. These compartments are specialised for disulfide bond formation, but both compartments have limitations. Results Here we show that the introduction into the cytoplasm of a catalyst of disulfide bond formation and a catalyst of disulfide bond isomerization allows the efficient formation of natively folded scFv and Fab antibody fragments in the cytoplasm of Escherichia coli with intact reducing pathways. Eleven scFv and eleven Fab fragments were screened and ten of each were obtained in yields of >5 mg/L from deep-well plates. Production of eight of the scFv and all ten of the Fab showed a strong dependence on the addition of the folding factors. Yields of purified scFv of up to 240 mg/L and yields of purified Fab fragments of up to 42 mg/L were obtained. Purified fragments showed circular dichroism spectra consistent with being natively folded and were biologically active. Conclusions Our results show that the efficient production of soluble, biologically active scFv and Fab antibody fragments in the cytoplasm of E. coli is not only possible, but facile. The required components can be easily transferred between different E. coli strains. Electronic supplementary material The online version of this article (doi:10.1186/s12934-016-0419-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anna Gaciarz
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland.
| | - Johanna Veijola
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland.
| | - Yuko Uchida
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland.
| | - Mirva J Saaranen
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland.
| | - Chunguang Wang
- Department of Medical Microbiology and Immunology and Medical Research Center, University of Oulu, Oulu, Finland.
| | - Sohvi Hörkkö
- Department of Medical Microbiology and Immunology and Medical Research Center, University of Oulu, Oulu, Finland. .,Nordlab Oulu, Oulu University Hospital, Oulu, Finland.
| | - Lloyd W Ruddock
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland.
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39
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Systematic screening of soluble expression of antibody fragments in the cytoplasm of E. coli. Microb Cell Fact 2016. [DOI: 10.10.1186/s12934-016-0419-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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40
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Antoniak DT, Duryee MJ, Mikuls TR, Thiele GM, Anderson DR. Aldehyde-modified proteins as mediators of early inflammation in atherosclerotic disease. Free Radic Biol Med 2015; 89:409-18. [PMID: 26432980 DOI: 10.1016/j.freeradbiomed.2015.09.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 09/02/2015] [Accepted: 09/23/2015] [Indexed: 12/31/2022]
Abstract
Inflammation is widely accepted to play a major role in atherosclerosis and other cardiovascular diseases. However, the exact mechanism(s) by which inflammation exerts its pathogenic effect remains poorly understood. A number of oxidatively modified proteins have been associated with cardiovascular disease. Recently, attention has been given to the oxidative compound of malondialdehyde and acetaldehyde, two reactive aldehydes known to covalently bind and adduct macromolecules. These products have been shown to form stable malondialdehyde-acetaldehyde (MAA) adducts that are reactive and induce immune responses. These adducts have been found in inflamed and diseased cardiovascular tissue of patients. Antibodies to these adducted proteins are measurable in the serum of diseased patients. The isotypes involved in the immune response to MAA (i.e., IgM, IgG, and IgA) are predictive of atherosclerotic disease progression and cardiovascular events such as an acute myocardial infarction or coronary artery bypass grafting. Therefore, it is the purpose of this article to review the past and current knowledge of aldehyde-modified proteins and their role in cardiovascular disease.
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Affiliation(s)
- Derrick T Antoniak
- Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Michael J Duryee
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE 68105, USA; Division of Rheumatology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Ted R Mikuls
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE 68105, USA; Division of Rheumatology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Geoffrey M Thiele
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE 68105, USA; Division of Rheumatology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Daniel R Anderson
- Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA.
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Silverman GJ. Protective natural autoantibodies to apoptotic cells: evidence of convergent selection of recurrent innate-like clones. Ann N Y Acad Sci 2015; 1362:164-75. [PMID: 25990717 DOI: 10.1111/nyas.12788] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
During murine immune development, recurrent B cell clones arise in a predictable fashion. Among these B cells, an archetypical clonotypic set that recognizes phosphorylcholine (PC) antigens and produces anti-PC IgM, first implicated for roles in microbial protection, was later found to become expanded in hyperlipidemic mice and in response to an increased in vivo burden of apoptotic cells. These IgM natural antibodies can enhance clearance of damaged cells and induce intracellular blockade of inflammatory signaling cascades. In clinical populations, raised levels of anti-PC IgM correlate with protection from atherosclerosis and may also downmodulate the severity of autoimmune disease. Human anti-PC-producing clones without hypermutation have been isolated that can similarly discriminate apoptotic from healthy cells. An independent report on unrelated adults has described anti-PC-producing B cells with IgM genes that have conserved CDR3 motifs, similar to stereotypic clonal sets of B cell chronic lymphocytic leukemia. Taken together, emerging evidence suggests that, despite the capacity to form an effectively limitless range of Ig receptors, the human immune system may often recurrently generate lymphocytes expressing structurally convergent B cell receptors with protective and homeostatic roles.
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Affiliation(s)
- Gregg J Silverman
- Departments of Medicine and Pathology, NYU School of Medicine, Alexandria Center for Life Science, New York, New York
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42
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Haller E, Lindner W, Lämmerhofer M. Gold nanoparticle-antibody conjugates for specific extraction and subsequent analysis by liquid chromatography-tandem mass spectrometry of malondialdehyde-modified low density lipoprotein as biomarker for cardiovascular risk. Anal Chim Acta 2014; 857:53-63. [PMID: 25604820 DOI: 10.1016/j.aca.2014.12.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/06/2014] [Accepted: 12/13/2014] [Indexed: 01/05/2023]
Abstract
Oxidized low-density lipoproteins (OxLDLs) like malondialdehyde-modified low-density lipoprotein (MDA-LDL) play a major role in atherosclerosis and have been proposed as useful biomarkers for oxidative stress. In this study, gold-nanoparticles (GNPs) were functionalized via distinct chemistries with anti-MDA-LDL antibodies (Abs) for selective recognition and capture of MDA-LDL from biological matrices. The study focused on optimization of binding affinities and saturation capacities of the antiMDA-LDL-Ab-GNP bioconjugate by exploring distinct random and oriented immobilization approaches, such as (i) direct adsorptive attachment of Abs on the GNP surface, (ii) covalent bonding by amide coupling of Abs to carboxy-terminated-pegylated GNPs, (iii) oriented immobilization via oxidized carbohydrate moiety of the Ab on hydrazide-derivatized GNPs and (iv) cysteine-tagged protein A (cProtA)-bonded GNPs. Depending on immobilization chemistry, up to 3 antibodies per GNP could be immobilized as determined by ELISA. The highest binding capacity was achieved with the GNP-cProtA-Ab bioconjugate which yielded a saturation capacity of 2.24±0.04μgmL(-1) GNP suspension for MDA-LDL with an affinity Kd of 5.25±0.11×10(-10)M. The GNP-cProtA-antiMDA-LDL bioconjugate revealed high specificity for MDA-LDL over copper(II)-oxidized LDL as well as native human LDL. This clearly demonstrates the usefulness of the new GNP-Ab bioconjugates for specific extraction of MDA-LDL from plasma samples as biomarkers of oxidative stress. Their combination as specific immunoextraction nanomaterials with analysis by LC-MS/MS allows sensitive and selective detection of MDA-LDL in complex samples.
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Affiliation(s)
- Elisabeth Haller
- Department of Analytical Chemistry, University of Vienna, Währingerstrasse 38, 1090 Vienna, Austria
| | - Wolfgang Lindner
- Department of Analytical Chemistry, University of Vienna, Währingerstrasse 38, 1090 Vienna, Austria
| | - Michael Lämmerhofer
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany.
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Warnecke A, Sandalova T, Achour A, Harris RA. PyTMs: a useful PyMOL plugin for modeling common post-translational modifications. BMC Bioinformatics 2014; 15:370. [PMID: 25431162 PMCID: PMC4256751 DOI: 10.1186/s12859-014-0370-6] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 10/30/2014] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Post-translational modifications (PTMs) constitute a major aspect of protein biology, particularly signaling events. Conversely, several different pathophysiological PTMs are hallmarks of oxidative imbalance or inflammatory states and are strongly associated with pathogenesis of autoimmune diseases or cancers. Accordingly, it is of interest to assess both the biological and structural effects of modification. For the latter, computer-based modeling offers an attractive option. We thus identified the need for easily applicable modeling options for PTMs. RESULTS We developed PyTMs, a plugin implemented with the commonly used visualization software PyMOL. PyTMs enables users to introduce a set of common PTMs into protein/peptide models and can be used to address research questions related to PTMs. Ten types of modification are currently supported, including acetylation, carbamylation, citrullination, cysteine oxidation, malondialdehyde adducts, methionine oxidation, methylation, nitration, proline hydroxylation and phosphorylation. Furthermore, advanced settings integrate the pre-selection of surface-exposed atoms, define stereochemical alternatives and allow for basic structure optimization of the newly modified residues. CONCLUSION PyTMs is a useful, user-friendly modelling plugin for PyMOL. Advantages of PyTMs include standardized generation of PTMs, rapid time-to-result and facilitated user control. Although modeling cannot substitute for conventional structure determination it constitutes a convenient tool that allows uncomplicated exploration of potential implications prior to experimental investments and basic explanation of experimental data. PyTMs is freely available as part of the PyMOL script repository project on GitHub and will further evolve. Graphical Abstract PyTMs is a useful PyMOL plugin for modeling common post-translational modifications.
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Affiliation(s)
- Andreas Warnecke
- Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Applied Immunology & Immunotherapy, L8:04, Karolinska Hospital, SE-171 76, Stockholm, Sweden.
| | - Tatyana Sandalova
- Department of Medicine Solna, Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden.
| | - Adnane Achour
- Department of Medicine Solna, Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden.
| | - Robert A Harris
- Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Applied Immunology & Immunotherapy, L8:04, Karolinska Hospital, SE-171 76, Stockholm, Sweden.
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Frostegård AG, Sjöberg BG, Frostegård J, Norman M. IgM-antibodies against phosphorylcholine in mothers and normal or low birth weight term newborn infants. PLoS One 2014; 9:e106584. [PMID: 25268587 PMCID: PMC4182035 DOI: 10.1371/journal.pone.0106584] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 08/03/2014] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE To determine levels of athero-protective IgM antibodies against phosphorylcholine in mothers and term-born normal or low birth weight infants. APPROACH Twenty three mother-infant pairs were studied, of whom 16 infants were within the normal weight range for gestational age (NGA; 3652[504] g) and 7 were small for gestational age (SGA; birth weight: 2715[255] g), the latter <2SD below the Swedish reference data mean for normal fetal growth. All infants were born at term (mean ± SD 40.5 ± 1.1 weeks). Serum was available from 6 mothers with SGA and 14 with NGA infants. Participating mothers were aged 34.0 ± 3.9 years (no difference between groups). Fourteen neonates were boys and seven were girls. Levels of anti-PC IgM were determined by ELISA. RESULTS Neonatal IgM anti-PC levels were low (undetectable in 8 infants out of which 3 were SGA) with a median of 76[range 0-2.51] U/ml. Maternal IgM anti-PC levels were significantly higher (median 7198[range: 25.32-656.0]) U/ml) and the proportion of mothers in highest quartile (>75th percentile) was larger in mothers of NGA-infants (43%) vs. those of SGA-infants (0%, p = 0.032). CONCLUSIONS IgM anti-PC levels are low at birth, which suggests that these antibodies do not play a "housekeeping" role in immune function during fetal life/development, but arise predominately on exposure to external antigens after birth. Furthermore, low maternal IgM anti-PC levels may play a role in placental insufficiency, contributing to poor fetal growth and a small-for-date baby. This preliminary observation may have implications for the future risk of atherosclerosis/cardiovascular disease development in pregnant women and their offspring.
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Affiliation(s)
- Anna G. Frostegård
- Unit of Immunology and Chronic Disease, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Beatrice G. Sjöberg
- Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Huddinge, Sweden
| | - Johan Frostegård
- Unit of Immunology and Chronic Disease, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Mikael Norman
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
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Gonen A, Hansen LF, Turner WW, Montano EN, Que X, Rafia A, Chou MY, Wiesner P, Tsiantoulas D, Corr M, VanNieuwenhze MS, Tsimikas S, Binder CJ, Witztum JL, Hartvigsen K. Atheroprotective immunization with malondialdehyde-modified LDL is hapten specific and dependent on advanced MDA adducts: implications for development of an atheroprotective vaccine. J Lipid Res 2014; 55:2137-55. [PMID: 25143462 DOI: 10.1194/jlr.m053256] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Immunization with homologous malondialdehyde (MDA)-modified LDL (MDA-LDL) leads to atheroprotection in experimental models supporting the concept that a vaccine to oxidation-specific epitopes (OSEs) of oxidized LDL could limit atherogenesis. However, modification of human LDL with OSE to use as an immunogen would be impractical for generalized use. Furthermore, when MDA is used to modify LDL, a wide variety of related MDA adducts are formed, both simple and more complex. To define the relevant epitopes that would reproduce the atheroprotective effects of immunization with MDA-LDL, we sought to determine the responsible immunodominant and atheroprotective adducts. We now demonstrate that fluorescent adducts of MDA involving the condensation of two or more MDA molecules with lysine to form malondialdehyde-acetaldehyde (MAA)-type adducts generate immunodominant epitopes that lead to atheroprotective responses. We further demonstrate that a T helper (Th) 2-biased hapten-specific humoral and cellular response is sufficient, and thus, MAA-modified homologous albumin is an equally effective immunogen. We further show that such Th2-biased humoral responses per se are not atheroprotective if they do not target relevant antigens. These data demonstrate the feasibility of development of a small-molecule immunogen that could stimulate MAA-specific immune responses, which could be used to develop a vaccine approach to retard or prevent atherogenesis.
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Affiliation(s)
- Ayelet Gonen
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Lotte F Hansen
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | | | - Erica N Montano
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Xuchu Que
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Apaїs Rafia
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Meng-Yun Chou
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Philipp Wiesner
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Dimitrios Tsiantoulas
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria Center for Molecular Medicine (CeMM) of the Austrian Academy of Sciences, Vienna, Austria
| | - Maripat Corr
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | | | - Sotirios Tsimikas
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Christoph J Binder
- Department of Medicine, University of California, San Diego, La Jolla, CA Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria Center for Molecular Medicine (CeMM) of the Austrian Academy of Sciences, Vienna, Austria
| | - Joseph L Witztum
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Karsten Hartvigsen
- Department of Medicine, University of California, San Diego, La Jolla, CA Department of Biomedical Sciences, University of Copenhagen, Denmark
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46
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Kummu O, Turunen SP, Prus P, Lehtimäki J, Veneskoski M, Wang C, Hörkkö S. Human monoclonal Fab and human plasma antibodies to carbamyl-epitopes cross-react with malondialdehyde-adducts. Immunology 2014; 141:416-30. [PMID: 24168430 DOI: 10.1111/imm.12204] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 10/23/2013] [Accepted: 10/23/2013] [Indexed: 12/30/2022] Open
Abstract
Oxidized low-density lipoprotein (OxLDL) plays a crucial role in the development of atherosclerosis. Carbamylated LDL has been suggested to promote atherogenesis in patients with chronic kidney disease. Here we observed that plasma IgG and IgM antibodies to carbamylated epitopes were associated with IgG and IgM antibodies to oxidation-specific epitopes (ρ = 0·65-0·86, P < 0·001) in healthy adults, suggesting a cross-reaction between antibodies recognizing carbamyl-epitopes and malondialdehyde (MDA)/malondialdehyde acetaldehyde (MAA) -adducts. We used a phage display technique to clone a human Fab antibody that bound to carbamylated LDL and other carbamylated proteins. Anti-carbamyl-Fab (Fab106) cross-reacted with oxidation-specific epitopes, especially with MDA-LDL and MAA-LDL. We showed that Fab106 bound to apoptotic Jurkat cells known to contain these oxidation-specific epitopes, and the binding was competed with soluble carbamylated and MDA-/MAA-modified LDL and BSA. In addition, Fab106 was able to block the uptake of carbamyl-LDL and MDA-LDL by macrophages and stained mouse atherosclerotic lesions. The observed cross-reaction between carbamylated and MDA-/MAA-modified LDL and its contribution to enhanced atherogenesis in uraemic patients require further investigation.
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Affiliation(s)
- Outi Kummu
- Department of Medical Microbiology and Immunology, Institute of Diagnostics, University of Oulu, Oulu, Finland; Medical Research Center Oulu, Oulu, Finland; NordLab Oulu, Oulu University Hospital, Oulu, Finland
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47
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Grönwall C, Silverman GJ. Natural IgM: beneficial autoantibodies for the control of inflammatory and autoimmune disease. J Clin Immunol 2014; 34 Suppl 1:S12-21. [PMID: 24691998 DOI: 10.1007/s10875-014-0025-4] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 03/19/2014] [Indexed: 12/13/2022]
Abstract
Natural IgM are highly represented in the circulation at birth, and these often autoreactive antibodies have been postulated to have innate-like properties and play crucial roles in apoptotic cell clearance, tissue homeostasis, and immune modulation. This review summarizes the known properties of these IgM autoantibodies, and the evidence that these anti-apoptotic cell IgM natural antibodies can regulate inflammatory responses through ancient pathways of the innate immune system that first arose long before the initial emergence of the adaptive immune system. While the regulatory contributions of these natural IgM autoantibodies are certainly not an essential and fundamental component of host defenses, these provide an additional layer to further protect the host. More importantly, these IgM antibody responses are highly inducible and their up-regulation can be a powerful means for the host to survive in a setting of chronic inflammation. The observed beneficial clinical associations for cardiovascular disease and autoimmunity, as well as opportunities for potential therapeutic implications are discussed.
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Affiliation(s)
- Caroline Grönwall
- Department of Medicine, New York University School of Medicine, New York, NY, 10016, USA,
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48
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Hyvärinen S, Uchida K, Varjosalo M, Jokela R, Jokiranta TS. Recognition of malondialdehyde-modified proteins by the C terminus of complement factor H is mediated via the polyanion binding site and impaired by mutations found in atypical hemolytic uremic syndrome. J Biol Chem 2013; 289:4295-306. [PMID: 24344133 DOI: 10.1074/jbc.m113.527416] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Atypical hemolytic uremic syndrome (aHUS) is a severe thrombotic microangiopathy characterized by uncontrolled complement activation against endothelial and blood cells. Mutations in the C-terminal target recognition domains 19-20 of complement regulator factor H (FH) are strongly associated with aHUS, but the mechanisms triggering disease onset have remained unresolved. Here we report that several aHUS-related mutations alter the binding of FH19-20 to proteins where lysines have reacted with malondialdehyde (MDA). Although FH19-20 did not interact with MDA-modified hexylamine, lysine-containing peptides, or a proteolytically degraded protein, it bound to MDA-modified polylysine. This suggests that FH19-20 recognizes only clustered MDA adducts. Binding of MDA-modified BSA to FH19-20 was ionic by nature, depended on positive residues of FH19-20, and competed with the polyanions heparin and DNA. This could not be explained with the mainly neutral adducts known to form in MDA modification. When positive charges of lysines were eliminated by acetic anhydride instead of MDA, the acetylated BSA started to bind FH19-20. Together, these results indicate that negative charges on the modified proteins dominate the interaction with FH19-20. This is beneficial for the physiological function of FH because by binding to the negative charges of the modified target, FH could prevent excess complement activation initiated by naturally occurring antibodies recognizing MDA epitopes with multiple different structures. We propose that oxidative stress leading to formation of MDA adducts is a common feature for triggers of aHUS and that failure of FH in protecting MDA-modified surfaces from complement activation is involved in the pathogenesis of the disease.
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Affiliation(s)
- Satu Hyvärinen
- From the Department of Bacteriology and Immunology, Haartman Institute, and Research Programs Unit, Immunobiology, University of Helsinki, FIN-00290 Helsinki, Finland
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