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Donoghue SE, Heath O, Pitt J, Hong KM, Fuller M, Smith J. Free urinary sialic acid levels may be elevated in patients with pneumococcal sepsis. Clin Chem Lab Med 2022; 60:1855-1858. [PMID: 36000484 DOI: 10.1515/cclm-2022-0473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 08/16/2022] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Urine free sialic acid (UFSA) is an important diagnostic biomarker for sialuria (GNE variants) and infantile sialic acid storage disease/Salla disease (SLC17A5 variants). Traditionally, UFSA has been measured using specific single-plex methodology in relatively small cohorts of patients with clinical symptoms suggestive of these disorders. The use of multiplex tandem mass spectrometry urine screening (UMSMS) has meant that UFSA can be measured semi-quantitatively in a much larger cohort of patients being investigated for suspected metabolic disorders. We hypothesised that the neuraminidase of Streptococcus pneumoniae may release free sialic acid from endogenous sialylated glycoconjugates and result in increased UFSA levels. METHODS We conducted a retrospective review of clinical records of patients who were identified as having S. pneumoniae infection and who also had UMSMS at the time of their acute infection. RESULTS We identified three cases of increased UFSA detected by UMSMS screening that were secondary to S. pneumoniae sepsis. Additional testing ruled out genetic causes of increased UFSA in the first patient. All three patients had overwhelming sepsis with multiorgan dysfunction which was fatal. Glycosylation abnormalities consistent with the removal of sialic acid were demonstrated in serum transferrin patterns in one patient. CONCLUSIONS We have demonstrated in a retrospective cohort that elevation of UFSA levels have been observed in cases of S. pneumoniae sepsis. This expands our knowledge of UFSA as a biomarker in human disease. This research demonstrates that infection with organisms with neuraminidase activity should be considered in patients with unexplained increases in UFSA.
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Affiliation(s)
- Sarah E Donoghue
- Department of Metabolic Medicine, The Royal Children's Hospital, Melbourne, VIC, Australia.,Department of Biochemical Genetics, Victorian Clinical Genetics Service, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Oliver Heath
- Department of Metabolic Medicine, The Royal Children's Hospital, Melbourne, VIC, Australia
| | - James Pitt
- Department of Biochemical Genetics, Victorian Clinical Genetics Service, Murdoch Children's Research Institute, Melbourne, VIC, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, VIC, Australia
| | - Kai Mun Hong
- Department of Biochemical Genetics, Victorian Clinical Genetics Service, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Maria Fuller
- Genetics and Molecular Pathology, SA Pathology, Adelaide, SA, Australia.,Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia
| | - Joel Smith
- Laboratory Services, Royal Children's Hospital, Melbourne, VIC, Australia.,Department of Pathology, Royal Melbourne Hospital, Melbourne, VIC, Australia
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2
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Anti-glycan antibodies: roles in human disease. Biochem J 2021; 478:1485-1509. [PMID: 33881487 DOI: 10.1042/bcj20200610] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 02/07/2023]
Abstract
Carbohydrate-binding antibodies play diverse and critical roles in human health. Endogenous carbohydrate-binding antibodies that recognize bacterial, fungal, and other microbial carbohydrates prevent systemic infections and help maintain microbiome homeostasis. Anti-glycan antibodies can have both beneficial and detrimental effects. For example, alloantibodies to ABO blood group carbohydrates can help reduce the spread of some infectious diseases, but they also impose limitations for blood transfusions. Antibodies that recognize self-glycans can contribute to autoimmune diseases, such as Guillain-Barre syndrome. In addition to endogenous antibodies that arise through natural processes, a variety of vaccines induce anti-glycan antibodies as a primary mechanism of protection. Some examples of approved carbohydrate-based vaccines that have had a major impact on human health are against pneumococcus, Haemophilus influeanza type b, and Neisseria meningitidis. Monoclonal antibodies specifically targeting pathogen associated or tumor associated carbohydrate antigens (TACAs) are used clinically for both diagnostic and therapeutic purposes. This review aims to highlight some of the well-studied and critically important applications of anti-carbohydrate antibodies.
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3
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Bartish M, Del Rincón SV, Rudd CE, Saragovi HU. Aiming for the Sweet Spot: Glyco-Immune Checkpoints and γδ T Cells in Targeted Immunotherapy. Front Immunol 2020; 11:564499. [PMID: 33133075 PMCID: PMC7550643 DOI: 10.3389/fimmu.2020.564499] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 08/31/2020] [Indexed: 11/23/2022] Open
Abstract
Though a healthy immune system is capable of recognizing and eliminating emergent cancerous cells, an established tumor is adept at escaping immune surveillance. Altered and tumor-specific expression of immunosuppressive cell surface carbohydrates, also termed the “tumor glycocode,” is a prominent mechanism by which tumors can escape anti-tumor immunity. Given their persistent and homogeneous expression, tumor-associated glycans are promising targets to be exploited as biomarkers and therapeutic targets. However, the exploitation of these glycans has been a challenge due to their low immunogenicity, immunosuppressive properties, and the inefficient presentation of glycolipids in a conventional major histocompatibility complex (MHC)-restricted manner. Despite this, a subset of T-cells expressing the gamma and delta chains of the T-cell receptor (γδ T cells) exist with a capacity for MHC-unrestricted antigen recognition and potent inherent anti-tumor properties. In this review, we discuss the role of tumor-associated glycans in anti-tumor immunity, with an emphasis on the potential of γδ T cells to target the tumor glycocode. Understanding the many facets of this interaction holds the potential to unlock new ways to use both tumor-associated glycans and γδ T cells in novel therapeutic interventions.
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Affiliation(s)
- Margarita Bartish
- Lady Davis Institute, Jewish General Hospital, Translational Center for Research in Cancer, McGill University, Montreal, QC, Canada
| | - Sonia V Del Rincón
- Lady Davis Institute, Jewish General Hospital, Translational Center for Research in Cancer, McGill University, Montreal, QC, Canada.,Oncology and Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Christopher E Rudd
- Division of Immuno-Oncology, Research Center Maisonneuve-Rosemont Hospital, Montreal, QC, Canada.,Département de Médecine, Université de Montréal, Montreal, QC, Canada
| | - H Uri Saragovi
- Lady Davis Institute, Jewish General Hospital, Translational Center for Research in Cancer, McGill University, Montreal, QC, Canada.,Oncology and Experimental Medicine, McGill University, Montreal, QC, Canada.,Pharmacology and Therapeutics, and Ophthalmology and Vision Sciences, McGill University, Montreal, QC, Canada
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4
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Nahm MH, Yu J, Vlach J, Bar-Peled M. A Common Food Glycan, Pectin, Shares an Antigen with Streptococcus pneumoniae Capsule. mSphere 2020; 5:e00074-20. [PMID: 32269150 PMCID: PMC7142292 DOI: 10.1128/msphere.00074-20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 03/20/2020] [Indexed: 01/31/2023] Open
Abstract
We are exposed daily to many glycans from bacteria and food plants. Bacterial glycans are generally antigenic and elicit antibody responses. It is unclear if food glycans' sharing of antigens with bacterial glycans influences our immune responses to bacteria. We studied 14 different plant foods for cross-reactivity with monoclonal antibodies (MAbs) against 24 pneumococcal serotypes which commonly cause infections and are included in pneumococcal vaccines. Serotype 15B-specific MAb cross-reacts with fruit peels, and serotype 10A MAb cross-reacts with many natural and processed plant foods. The serotype 10A cross-reactive epitope is terminal 1,6-linked β-galactose [βGal(1-6)], present in the rhamno-galacturonan I (RG-I) domain of pectin. Despite wide consumption of pectin, the immune response to 10A is comparable to the responses to other serotypes. An antipectin antibody can opsonize serotype 10A pneumococci, and the shared βGal(1-6) may be useful as a simple vaccine against 10A. Impact of food glycans should be considered in host-pathogen interactions and future vaccine designs.IMPORTANCE The impact of food consumption on vaccine responses is unknown. Streptococcus pneumoniae (the pneumococcus) is an important human pathogen, and its polysaccharide capsule is used as a vaccine. We show that capsule type 10A in a pneumococcal vaccine shares an antigenic epitope, βGal(1-6), with pectin, which is in many plant foods and is widely consumed. Immune response to 10A is comparable to that seen with other capsule types, and pectin ingestion may have little impact on vaccine responses. However, antibody to pectin can kill serotype 10A pneumococci and this shared epitope may be considered in pneumococcal vaccine designs.
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Affiliation(s)
- Moon H Nahm
- Department of Medicine, Division of Pulmonary, Allergy & Critical Care, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jigui Yu
- Department of Medicine, Division of Pulmonary, Allergy & Critical Care, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jiri Vlach
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Maor Bar-Peled
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia, USA
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5
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Genetics behind the Biosynthesis of Nonulosonic Acid-Containing Lipooligosaccharides in Campylobacter coli. J Bacteriol 2019; 201:JB.00759-18. [PMID: 30692173 DOI: 10.1128/jb.00759-18] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 01/24/2019] [Indexed: 02/07/2023] Open
Abstract
Campylobacter jejuni and Campylobacter coli are the most common causes of bacterial gastroenteritis in the world. Ganglioside mimicry by C. jejuni lipooligosaccharide (LOS) is the triggering factor of Guillain-Barré syndrome (GBS), an acute polyneuropathy. Sialyltransferases from glycosyltransferase family 42 (GT-42) are essential for the expression of ganglioside mimics in C. jejuni Recently, two novel GT-42 genes, cstIV and cstV, have been identified in C. coli Despite being present in ∼11% of currently available C. coli genomes, the biological role of cstIV and cstV is unknown. In the present investigation, mutation studies with two strains expressing either cstIV or cstV were performed and mass spectrometry was used to investigate differences in the chemical composition of LOS. Attempts were made to identify donor and acceptor molecules using in vitro activity tests with recombinant GT-42 enzymes. Here we show that CstIV and CstV are involved in C. coli LOS biosynthesis. In particular, cstV is associated with LOS sialylation, while cstIV is linked to the addition of a diacetylated nonulosonic acid residue.IMPORTANCE Despite the fact that Campylobacter coli a major foodborne pathogen, its glycobiology has been largely neglected. The genetic makeup of the C. coli lipooligosaccharide biosynthesis locus was largely unknown until recently. C. coli harbors a large set of genes associated with lipooligosaccharide biosynthesis, including genes for several putative glycosyltransferases involved in the synthesis of sialylated lipooligosaccharide in Campylobacter jejuni In the present study, C. coli was found to express lipooligosaccharide structures containing sialic acid and other nonulosonate acids. These findings have a strong impact on our understanding of C. coli ecology, host-pathogen interaction, and pathogenesis.
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6
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The serum SA levels are significantly increased in sepsis but decreased in cirrhosis. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2019; 162:335-348. [PMID: 30905461 DOI: 10.1016/bs.pmbts.2019.01.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Most of proteins in human blood circulation are glycoproteins with one or more covalently linked N- or O-linked glycans. Sialic acid (SA) generally occurs as the terminal monosaccharide on the glycans. SA in glycoproteins modulates a wide range of physiological and pathological processes and has been routinely measured in hospital since 1950s. Increased serum SA levels have been associated with different types of cancers. However, a systematic comparison of the serum SA levels in different types of human diseases has not been reported. In current study, 160,537 clinical lab test results of serum SA levels from healthy individuals and patients with 64 different types of diseases during the past 5 years in our hospital were retrieved and analyzed. Based on the mean (SD), median, and p (-Log10p) values, we found that patients suffering 55 different types of cancer and noncancer diseases such as sepsis, pancreatitis, bone cancer, rheumatoid arthritis, pancreatic cancer, and encephalitis had significantly (p<0.05, -Log10p>1.30) increased median serum SA levels whereas patients suffering hepatic encephalopathy, cirrhosis, renal cyst, and hepatitis had significantly decreased median serum SA levels compared to that of healthy controls. Moreover, the greatest increase in the mean (SD) and -Log10p values was observed in sepsis and pancreatitis, respectively, but not in cancers. Thus, the regulations of serum SA levels were much more complicated than previously assumed. Understanding the molecular mechanisms behind these observations would make serum SA a useful biomarker to facilitate personalized diagnosis and treatment for patients with different diseases.
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Yoshida F, Yoshinaka H, Tanaka H, Hanashima S, Yamaguchi Y, Ishihara M, Saburomaru M, Kato Y, Saito R, Ando H, Kiso M, Imamura A, Ishida H. Synthesis of the Core Oligosaccharides of Lipooligosaccharides from
Campylobacter jejuni
: A Putative Cause of Guillain–Barré Syndrome. Chemistry 2018; 25:796-805. [DOI: 10.1002/chem.201804862] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Fumi Yoshida
- Department of Applied Bio-organic ChemistryGifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Hiroki Yoshinaka
- Department of Applied Bio-organic ChemistryGifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Hidenori Tanaka
- Center for Highly Advanced Integration and Nano and Life Sciences, (G-CHAIN)Gifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Shinya Hanashima
- Structural Glycobiology Team, Systems Glycobiology Research GroupRIKEN Global Research Cluster 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Yoshiki Yamaguchi
- Structural Glycobiology Team, Systems Glycobiology Research GroupRIKEN Global Research Cluster 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Mikio Ishihara
- Department of Applied Bio-organic ChemistryGifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Miyuki Saburomaru
- Department of Applied Bio-organic ChemistryGifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Yuki Kato
- Department of Applied Bio-organic ChemistryGifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Risa Saito
- Department of Applied Bio-organic ChemistryGifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Hiromune Ando
- Center for Highly Advanced Integration and Nano and Life Sciences, (G-CHAIN)Gifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Makoto Kiso
- Department of Applied Bio-organic ChemistryGifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Akihiro Imamura
- Department of Applied Bio-organic ChemistryGifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
| | - Hideharu Ishida
- Department of Applied Bio-organic ChemistryGifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
- Center for Highly Advanced Integration and Nano and Life Sciences, (G-CHAIN)Gifu University 1-1 Yanagido Gifu-shi Gifu 501-1193 Japan
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8
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Origin, evolution, and distribution of the molecular machinery for biosynthesis of sialylated lipooligosaccharide structures in Campylobacter coli. Sci Rep 2018; 8:3028. [PMID: 29445215 PMCID: PMC5813019 DOI: 10.1038/s41598-018-21438-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 02/05/2018] [Indexed: 01/04/2023] Open
Abstract
Campylobacter jejuni and Campylobacter coli are the most common cause of bacterial gastroenteritis worldwide. Additionally, C. jejuni is the most common bacterial etiological agent in the autoimmune Guillain-Barré syndrome (GBS). Ganglioside mimicry by C. jejuni lipooligosaccharide (LOS) is the triggering factor of the disease. LOS-associated genes involved in the synthesis and transfer of sialic acid (glycosyltranferases belonging to family GT-42) are essential in C. jejuni to synthesize ganglioside-like LOS. Despite being isolated from GBS patients, scarce genetic evidence supports C. coli role in the disease. In this study, through data mining and bioinformatics analysis, C. coli is shown to possess a larger GT-42 glycosyltransferase repertoire than C. jejuni. Although GT-42 glycosyltransferases are widely distributed in C. coli population, only a fraction of C. coli strains (1%) are very likely able to express ganglioside mimics. Even though the activity of C. coli specific GT-42 enzymes and their role in shaping the bacterial population are yet to be explored, evidence presented herein suggest that loss of function of some LOS-associated genes occurred during agriculture niche adaptation.
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9
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Loshaj-Shala A, Colzani M, Brezovska K, Poceva Panovska A, Suturkova L, Beretta G. Immunoproteomic identification of antigenic candidate Campylobacter jejuni and human peripheral nerve proteins involved in Guillain-Barré syndrome. J Neuroimmunol 2018; 317:77-83. [PMID: 29338928 DOI: 10.1016/j.jneuroim.2018.01.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 01/04/2018] [Accepted: 01/07/2018] [Indexed: 12/11/2022]
Abstract
Immunoproteomics is become a potent methodology used for identifying immunoreactive proteins. In this study, an immunoproteomic approach based on 2-dimensional gel electrophoresis (2D-PAGE) and immunoblotting combined with high resolution mass spectrometry (MS) was used to identify immunoreactive proteins that might be involved in mechanisms of Guillain-Barré syndrome (GBS) development, regardless of their potential reciprocal molecular mimicry. Proteins isolated from C. jejuni and human peripheral nerve tissue (HPN) were separated with 2D SDS-PAGE and subjected to western blotting using serum samples from GBS patients. The peptides generated after proteolysis of the immunoreactive proteins were submitted to nanoflow-high performance liquid chromatography-nano electrospray ionization coupled to high resolution mass spectrometry (nHPLC-nESI-MS and MS/MS) followed by SEQUESTdata analysis for proteins identification. In C. jejuni, immunoreactivity was found for GroEL and DnaK, structural proteins (MOMP), key enzymatic proteins necessary for the microbial proliferation (adenylate kinase, enolase, inorganic pyrophosphatase and aspartate ammonia-lyase), and antioxidant enzymes (alkyl hydroperoxide reductase-AhpC and DNA protection during starvation protein - DNA protection factor against Fe2+-mediated oxidative stress). HPN immunoreactive proteins identified were heat shock proteins (HSP), intermediate filaments (vimentin and desmin), and other proteins and enzymes such as troponin/tropomyosin complex and ATP synthase subunit beta and the keratan sulfate proteoglycan lumican. The targeting of vimentin and desmin, suggested that the neuronal autoimmune damage is specifically directed to intermediate neuronal (vimentin) and neuromuscular IF, probably localized nearby cell surface, affording increased accessibility to autoantibodies. These findings suggest that the post-infectious development of GBS may be also associated to additional concomitant immune factors that lead to nerve damage generated by auto-immune trigger(s) different from molecular mimicry.
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Affiliation(s)
- Aida Loshaj-Shala
- Department of Pharmacy, Faculty of Medicine, University Hasan Prishtina, Pristina, Kosovo
| | - Mara Colzani
- Department of Pharmaceutical Sciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Katerina Brezovska
- Faculty of Pharmacy, University Ss. Cyril and Methodius, Skopje, Macedonia
| | | | - Ljubica Suturkova
- Faculty of Pharmacy, University Ss. Cyril and Methodius, Skopje, Macedonia
| | - Giangiacomo Beretta
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy.
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10
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Wolfram W, Sauerwein KMT, Binder CJ, Eibl-Musil N, Wolf HM, Fischer MB. Pneumococcal Polysaccharide Vaccination Elicits IgG Anti-A/B Blood Group Antibodies in Healthy Individuals and Patients with Type I Diabetes Mellitus. Front Immunol 2016; 7:493. [PMID: 27895641 PMCID: PMC5108245 DOI: 10.3389/fimmu.2016.00493] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 10/25/2016] [Indexed: 12/20/2022] Open
Abstract
Hypothesis Blood group antibodies are natural antibodies that develop early in life in response to cross-reactive environmental antigens in the absence of antigen encounter. Even later in life structural similarities in saccharide composition between environmental antigens such as bacterial polysaccharides and blood group A/B antigens could lead to changes in serum levels, IgM/IgG isotype, and affinity maturation of blood group anti-A/B antibodies. We addressed the question whether immunization with pneumococcal polysaccharide (PnP) vaccine Pneumo 23 Vaccine “Pasteur Merieux” (Pn23) could have such an effect in patients with type I diabetes mellitus (DM I), an autoimmune disease where an aberrant immune response to microbial antigens likely plays a role. Methods Anti-PnP IgM and IgG responses were determined by ELISA, and the DiaMed-ID Micro Typing System was used to screen anti-A/B antibody titer before and after Pn23 immunization in 28 healthy individuals and 16 patients with DM I. In addition, surface plasmon resonance (SPR) technology using the Biacore® device and a synthetic blood group A/B trisaccharide as the antigen was applied to investigate IgM and IgG anti-A/B antibodies and to measure antibody binding dynamics. Results All healthy individuals and DM I patients responded with anti-PnP IgM and IgG antibody production 4–6 weeks after Pn23 immunization, while no increase in blood group anti-A/B antibody titer was observed when measured by the DiaMed-ID Micro Typing System. Interestingly, isotype-specific testing by SPR technology revealed an increase in blood group anti-A/B IgG, but not IgM, following Pn23 immunization in both patients and controls. No change in binding characteristics of blood group anti-A/B antibodies could be detected following Pn23 vaccination, supporting the assumption of an increase in IgG antibody titer with no or very little affinity maturation. Conclusion The study provides evidence for epitope sharing between pneumococcal polysaccharides and blood group ABO antigens, which leads to a booster of blood group anti-A/B antibodies of the IgG isotype after Pn23 immunization in healthy individuals. Manifest autoimmunity such as present in DM I patients has no additional effect on the cross-reactive antibody response against pneumococcal polysaccharides and blood group antigens.
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Affiliation(s)
- Wendelin Wolfram
- Clinic for Blood Group Serology and Transfusion Medicine, Medical University of Vienna , Vienna , Austria
| | | | - Christoph J Binder
- Department of Laboratory Medicine, Medical University of Vienna , Vienna , Austria
| | | | - Hermann M Wolf
- Immunology Outpatient Clinic, Vienna, Austria; Sigmund Freud Private University - Medical School, Vienna, Austria
| | - Michael B Fischer
- Clinic for Blood Group Serology and Transfusion Medicine, Medical University of Vienna, Vienna, Austria; Department for Health Science and Biomedicine, Danube University Krems, Krems, Austria
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11
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Lardone RD, Yuki N, Irazoqui FJ, Nores GA. Individual Restriction Of Fine Specificity Variability In Anti-GM1 IgG Antibodies Associated With Guillain-Barré Syndrome. Sci Rep 2016; 6:19901. [PMID: 26818965 PMCID: PMC4730213 DOI: 10.1038/srep19901] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/14/2015] [Indexed: 11/28/2022] Open
Abstract
Elevated titers of serum antibodies against GM1 ganglioside are associated with a variety of autoimmune neuropathies. Much evidence indicates these autoantibodies play a primary role in the disease processes, but the mechanism for their appearance is unclear. We studied the fine specificity of anti-GM1 antibodies of the IgG isotype present in sera from patients with Guillain-Barré syndrome (GBS), using thin-layer chromatogram-immunostaining of GM1, asialo-GM1 (GA1), GD1b and GM1-derivatives with small modifications on the oligosaccharide moiety. We were able to distinguish populations of antibodies with different fine specificity. Remarkably, individual patients presented only one or two of them, and different patients had different populations. This restriction in the variability of antibody populations suggests that the appearance of the anti-GM1 antibodies is a random process involving restricted populations of lymphocytes. With the origin of disease-associated anti-GM1 antibodies as a context, this finding could provide explanation for the “host susceptibility factor” observed in GBS following enteritis with GM1 oligosaccharide-carrying strains of Campylobacter jejuni.
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Affiliation(s)
- Ricardo D Lardone
- Departamento de Química Biológica "Dr. Ranwel Caputto" - CIQUIBIC, CONICET, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Nobuhiro Yuki
- Brain and Mind Centre, University of Sydney, Sydney, Australia
| | - Fernando J Irazoqui
- Departamento de Química Biológica "Dr. Ranwel Caputto" - CIQUIBIC, CONICET, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Gustavo A Nores
- Departamento de Química Biológica "Dr. Ranwel Caputto" - CIQUIBIC, CONICET, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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12
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Sato S, Yoshimasa Y, Fujita D, Yagi-Utsumi M, Yamaguchi T, Kato K, Fujita M. A Self-Assembled Spherical Complex Displaying a Gangliosidic Glycan Cluster Capable of Interacting with Amyloidogenic Proteins. Angew Chem Int Ed Engl 2015; 54:8435-9. [PMID: 26015171 DOI: 10.1002/anie.201501981] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 03/31/2015] [Indexed: 11/11/2022]
Abstract
Physiological and pathological functions of glycans are promoted through their clustering effects as exemplified by a series of gangliosides, sialylated glycosphingolipids, which serve as acceptors for bacterial toxins and viruses. Furthermore, ganglioside GM1 clusters on neuronal cell membranes specifically interact with amyloidogenic proteins, triggering their conformational transitions and leading to neurodegeneration. Here we develop a self-assembled spherical complex that displays a cluster of the GM1 pentasaccharide, and successfully demonstrate its ability to interact with amyloid β and α-synuclein. Due to the lack of hydrophobic lipid moieties, which would stably trap these cohesive proteins or give rise to toxic aggregates, this artificial cluster enabled NMR spectroscopic characterization of the early encounter stage of protein interactions with its outer carbohydrate moieties, which were not observable with previous glycan clusters.
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Affiliation(s)
- Sota Sato
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan). .,Current address: WPI-AIMR, Tohoku University (Japan).
| | - Yutaka Yoshimasa
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)
| | - Daishi Fujita
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)
| | - Maho Yagi-Utsumi
- Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science and Department of Bioorganization Research, Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 (Japan)
| | - Takumi Yamaguchi
- Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science and Department of Bioorganization Research, Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 (Japan)
| | - Koichi Kato
- Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science and Department of Bioorganization Research, Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 (Japan).
| | - Makoto Fujita
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan).
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Sato S, Yoshimasa Y, Fujita D, Yagi-Utsumi M, Yamaguchi T, Kato K, Fujita M. A Self-Assembled Spherical Complex Displaying a Gangliosidic Glycan Cluster Capable of Interacting with Amyloidogenic Proteins. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501981] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Fischer MB, Wolfram W, Binder CJ, Böhmig GA, Wahrmann M, Eibl MM, Wolf HM. Surface Plasmon Resonance Analysis Shows an IgG-Isotype-Specific Defect in ABO Blood Group Antibody Formation in Patients with Common Variable Immunodeficiency. Front Immunol 2015; 6:211. [PMID: 25999949 PMCID: PMC4422094 DOI: 10.3389/fimmu.2015.00211] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 04/17/2015] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Common variable immunodeficiency (CVID) is the most common clinically severe primary immunodeficiency and comprises a heterogeneous group of patients with recurrent severe bacterial infections due to the failure to produce IgG antibodies after exposure to infectious agents and immunization. Diagnostic recommendations for antibody failure include assessment of isoagglutinins. We have readdressed this four decades old but still accepted recommendation with up to date methodology. METHODS Anti-A/B IgM- and IgG-antibodies were measured by Diamed-ID Micro Typing, surface plasmon resonance (SPR) using the Biacore(®) device and flow cytometry. RESULTS When Diamed-ID Micro Typing was used, CVID patients (n = 34) showed IgG- and IgM-isoagglutinins that were comparable to healthy volunteers (n = 28), while all XLA patients (n = 8) had none. Anti-A/B IgM-antibodies were present in more than 2/3 of the CVID patients and showed binding kinetics comparable to anti-A/B IgM-antibodies from healthy individuals. A correlation could be found in CVID patients between levels of anti-A/B IgM-antibodies and levels of serum IgM and PnP-IgM-antibodies. In contrast in CVID patients as a group ABO antibodies were significantly decreased when assessed by SPR, which correlated with levels of switched memory, non-switched memory and naïve B cells, but all CVID patients had low/undetectable anti-A/B IgG-antibodies. CONCLUSION These results indicate that conventional isoagglutinin assessment and assessment of anti-A/B IgM antibodies are not suited for the diagnosis of impaired antibody production in CVID. Examination of anti-A/B IgG antibodies by SPR provides a useful method for the diagnosis of IgG antibody failure in all CVID patients studied, thus indicating an important additional rationale to start immunoglobulin replacement therapy early in these patients, before post-infectious sequelae develop.
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Affiliation(s)
- Michael B. Fischer
- Department of Transfusion Medicine, Medical University of Vienna, Vienna, Austria
- Center of Biomedical Technology, Danube University Krems, Krems an der Donau, Austria
| | - Wendelin Wolfram
- Department of Transfusion Medicine, Medical University of Vienna, Vienna, Austria
| | - Christoph J. Binder
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Georg A. Böhmig
- Division of Nephrology and Dialysis, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Markus Wahrmann
- Division of Nephrology and Dialysis, Department of Medicine III, Medical University of Vienna, Vienna, Austria
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Yagi-Utsumi M, Kato K. Structural and dynamic views of GM1 ganglioside. Glycoconj J 2015; 32:105-12. [DOI: 10.1007/s10719-015-9587-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 03/30/2015] [Indexed: 11/29/2022]
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Mitsui Y, Kusunoki S, Arimura K, Kaji R, Kanda T, Kuwabara S, Sonoo M, Takada K. A multicentre prospective study of Guillain-Barré syndrome in Japan: a focus on the incidence of subtypes. J Neurol Neurosurg Psychiatry 2015; 86:110-4. [PMID: 24273220 DOI: 10.1136/jnnp-2013-306509] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Guillain-Barré Syndrome (GBS) is classified into the two major subtypes; acute inflammatory demyelinating polyneuropathy (AIDP) and acute motor axonal neuropathy (AMAN). Previous studies have suggested that AIDP is predominant and AMAN is rare in Western countries, whereas AMAN is not always uncommon in East Asia. We aimed to clarify the incidence of the subtypes of GBS in Japan. METHODS We performed a prospective multicentre survey over 3 years (2007-2010). Clinical and electrophysiological findings were collected from 184 patients with GBS in 23 tertiary neurology institutes. Anti-ganglioside antibodies were measured by ELISA. We also surveyed the incidence of Fisher syndrome (FS). RESULTS By electrodiagnostic criteria of Ho et al, patients were classified as having AIDP (40%), or AMAN (22%), or unclassified (38%). Anti-GM1 IgG antibodies were found for 47% of AMAN patients, and 18% of AIDP patients (p<0.001). There were no specific regional trends of the electrodiagnosis and anti-GM1 positivity. During the same study period, 79 patients with FS were identified; the percentage of FS cases out of all cases (FS/(GBS+FS)) was 26%. CONCLUSIONS The frequency of GBS patients with the electrodiagnosis of AMAN by single nerve conduction studies is approximately 20% in Japan, and the AMAN pattern is closely associated with anti-GM1 antibodies. The incidence of FS appears to be much higher in Japan than in Western countries.
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Affiliation(s)
- Yoshiyuki Mitsui
- Faculty of Medicine, Department of Neurology, Kinki University, Osaka, Japan
| | - Susumu Kusunoki
- Faculty of Medicine, Department of Neurology, Kinki University, Osaka, Japan
| | | | - Ryuji Kaji
- Department of Neurology, Tokushima University Graduate School of Medicine, Tokushima, Japan
| | - Takashi Kanda
- Department of Neurology, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Satoshi Kuwabara
- Department of Neurology, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Masahiro Sonoo
- Department of Neurology, Teikyo University School of Medicine, Tokyo, Japan
| | - Kazuo Takada
- Faculty of Medicine, Department of Neurology, Kinki University, Osaka, Japan
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18
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Abstract
Siglecs are mammalian sialic acid (Sia) recognizing immunoglobulin-like receptors expressed across the major leukocyte lineages, and function to recognize ubiquitous Sia epitopes on cell surface glycoconjugates and regulate immunological and inflammatory activities of these cells. A large subset referred to as CD33-related Siglecs are inhibitory receptors that limit leukocyte activation, and recent research has shown that the pathogen group B Streptococcus (GBS) binds to these Siglecs in Sia- and protein-dependent fashion to downregulate leukocyte bactericidal capacity. Conversely, sialoadhesin is a macrophage phagocytic receptor that engages GBS and other sialylated pathogens to promote effective phagocytosis and antigen presentation for the adaptive immune response. A variety of other important Siglec interactions with bacterial, viral and protozoan pathogens are beginning to be recognized. Siglec genes and binding specificities are rapidly evolving among primates, with key extant polymorphisms in human populations that may influence susceptibility to infection-associated disorders including chronic obstructive pulmonary disease and premature birth. This review summarizes current understanding of interactions between pathogens and Siglecs, a field of investigation that is likely to continue expanding in scope and medical importance.
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Affiliation(s)
- Yung-Chi Chang
- Glycobiology Research and Training Center Department of Pediatrics
| | - Victor Nizet
- Glycobiology Research and Training Center Department of Pediatrics Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA
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A CMP-N-acetylneuraminic Acid Synthetase Purified from a Marine Bacterium,Photobacterium leiognathiJT-SHIZ-145. Biosci Biotechnol Biochem 2014; 75:47-53. [DOI: 10.1271/bbb.100506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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del Carmen Fernández-Alonso M, Díaz D, Berbis MÁ, Marcelo F, Cañada J, Jiménez-Barbero J. Protein-carbohydrate interactions studied by NMR: from molecular recognition to drug design. Curr Protein Pept Sci 2013; 13:816-30. [PMID: 23305367 PMCID: PMC3706953 DOI: 10.2174/138920312804871175] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 07/12/2012] [Accepted: 07/25/2012] [Indexed: 02/04/2023]
Abstract
Diseases that result from infection are, in general, a consequence of specific interactions between a pathogenic organism and the cells. The study of host-pathogen interactions has provided insights for the design of drugs with therapeutic properties. One area that has proved to be promising for such studies is the constituted by carbohydrates which participate in biological processes of paramount importance. On the one hand, carbohydrates have shown to be information carriers with similar, if not higher, importance than traditionally considered carriers as amino acids and nucleic acids. On the other hand, the knowledge on molecular recognition of sugars by lectins and other carbohydrate-binding proteins has been employed for the development of new biomedical strategies. Biophysical techniques such as X-Ray crystallography and NMR spectroscopy lead currently the investigation on this field. In this review, a description of traditional and novel NMR methodologies employed in the study of sugar-protein interactions is briefly presented in combination with a palette of NMR-based studies related to biologically and/or pharmaceutically relevant applications.
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Hartung HP, Keller-Stanislawski B, Hughes RA, Lehmann HC. [Guillain-Barré syndrome after exposure to influenza]. DER NERVENARZT 2012; 83:714-30. [PMID: 22528062 DOI: 10.1007/s00115-012-3479-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Guillain-Barré Syndrome (GBS) is an acquired, monophasic inflammatory polyradiculoneuritis of autoimmune origin, which occurs after infection and occasionally also after vaccination. Seasonal and pandemic influenza vaccines have in particular been implicated as triggers for GBS. However, a number of recent studies indicate that infection with influenza virus may also cause GBS. This review summarizes the epidemiological and experimental data of the association of GBS with exposure to influenza antigens by immunization (including vaccines against A/H1N1/2009) and infection. Vaccination against influenza is associated with a very low risk for the occurrence of GBS. In contrast infection with influenza may play a more important role as a triggering factor for GBS than previously assumed.
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Affiliation(s)
- H-P Hartung
- Neurologische Klinik, Heinrich-Heine-Universität, Moorenstr. 5, 40225 Düsseldorf, Deutschland.
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22
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Draft Genome Sequences of Two Campylobacter jejuni Clinical Isolates, NW and D2600. J Bacteriol 2012; 194:5707-8. [DOI: 10.1128/jb.01338-12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
ABSTRACT
The
Campylobacter jejuni
human clinical isolates NW and D2600 colonized C57BL/6 interleukin-10-deficient (IL-10
−/−
) mice without inducing a robust inflammatory response (J. A. Bell et al., BMC Microbiol. 9:57, 2009). We announce draft genome sequences of NW and D2600 to facilitate comparisons with strains that induce gastrointestinal inflammation in this mouse model.
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24
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Gu Y, Chen ZW, Siegel A, Koshy R, Ramirez C, Raabe TD, DeVries GH, Ilyas AA. Analysis of humoral immune responses to LM1 ganglioside in guinea pigs. J Neuroimmunol 2012; 246:58-64. [DOI: 10.1016/j.jneuroim.2012.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 02/29/2012] [Accepted: 03/01/2012] [Indexed: 11/25/2022]
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Holden KM, Gilbert M, Coloe PJ, Li J, Fry BN. The role of WlaRG, WlaTB and WlaTC in lipooligosaccharide synthesis by Campylobacter jejuni strain 81116. Microb Pathog 2012; 52:344-52. [PMID: 22445818 DOI: 10.1016/j.micpath.2012.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2011] [Revised: 02/29/2012] [Accepted: 03/02/2012] [Indexed: 11/27/2022]
Abstract
Campylobacter jejuni is a major bacterial cause of gastroenteritis world-wide. C. jejuni produces a range of glycans including lipooligosaccharide (LOS), an important virulence factor. The genetic content of the LOS synthesis locus varies between C. jejuni strains and 19 classes have been described. Three LOS synthesis genes of C. jejuni strain 81116 (NCTC 11828), wlaRG, wlaTB and wlaTC were the focus of this study. WlaRG and the remaining two proteins of interest share sequence similarity to aminotransferases and glycosyltransferases, respectively. These genes were insertionally inactivated and phenotypically characterised. Each mutant produced truncated LOS. Mutants lacking WlaRG, WlaTB and WlaTC produced LOS with reduced immunogenicity. Both the wlaRG and wlaTC mutants were non-motile and aflagellate. In vitro invasion and adhesion assays revealed that the wlaRG, wlaTB and wlaTC mutants displayed reduced adherence to chicken embryo fibroblasts. All mutants were less invasive of human cells than 81116 confirming the role of intact LOS during invasion of human cells in vitro. Here we propose the general composition for the 81116 LOS core backbone based on capillary electrophoresis-mass spectrometry.
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Affiliation(s)
- Karen M Holden
- School of Applied Sciences, RMIT University, Melbourne, Bundoora, VIC 3083, Australia.
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26
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Galoin-Bertail C, Ogier de Baulny H, Wanders R, Schiff M, Bellavoine V, Mlika A, Benoist G, Baruteau J. Le syndrôme de Sjögren-Larsson : à propos de 2 cas. Arch Pediatr 2012; 19:135-41. [DOI: 10.1016/j.arcped.2011.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 07/05/2011] [Accepted: 11/07/2011] [Indexed: 10/14/2022]
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Pukin AV, Jacobs BC, Tio-Gillen AP, Gilbert M, Endtz HP, van Belkum A, Visser GM, Zuilhof H. Detection of antibodies in neuropathy patients by synthetic GM1 mimics. Glycobiology 2011; 21:1642-50. [DOI: 10.1093/glycob/cwr093] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Lehmann HC, Meyer Zu Horste G, Kieseier BC, Hartung HP. Pathogenesis and treatment of immune-mediated neuropathies. Ther Adv Neurol Disord 2011; 2:261-81. [PMID: 21179533 DOI: 10.1177/1756285609104792] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Immune-mediated neuropathies represent a heterogeneous spectrum of peripheral nerve disorders that can be classified according to time course, predominant involvement of motor/sensory fibers, distribution of deficits and paraclinical parameters such as electrophysiology and serum antibodies. In the last few years, significant advances have been achieved in elucidating underlying pathomechanisms, which made it possible to identify potential therapeutic targets. In this review, we discuss the latest development in pathogenesis and treatment of immune-mediated neuropathies.
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29
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Pukin AV, Florack DEA, Brochu D, van Lagen B, Visser GM, Wennekes T, Gilbert M, Zuilhof H. Chemoenzymatic synthesis of biotin-appended analogues of gangliosides GM2, GM1, GD1a and GalNAc-GD1a for solid-phase applications and improved ELISA tests. Org Biomol Chem 2011; 9:5809-15. [DOI: 10.1039/c1ob00009h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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30
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Lehmann HC, Hartung HP. Plasma exchange and intravenous immunoglobulins: mechanism of action in immune-mediated neuropathies. J Neuroimmunol 2010; 231:61-9. [PMID: 21056913 DOI: 10.1016/j.jneuroim.2010.09.015] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Immune-mediated neuropathies are a heterogeneous group of peripheral nerve disorders, which are classified by time course, clinical pattern, affected nerves and pathological features. Plasma exchange (PE) and intravenous immunoglobulins (IVIg) are mainstays in the treatment of immune-mediated neuropathies. Of all treatments currently used, IVIg has probably the widest application range in immune-mediated neuropathies and efficacy has been well documented in several randomized controlled trials for Guillain-Barré syndrome and chronic inflammatory demyelinating polyneuropathy (CIDP). Beneficial effects of IVIg have also been proven for multifocal motor neuropathy (MMN). Likewise, PE is an established treatment for GBS and CIDP, whereas it is considered to be ineffective in MMN. Different mechanisms of action are sought to be responsible for the immunemodulatory effect of PE and IVIg in autoimmune disorders. Some of those might be important for immune-mediated neuropathies, while others are probably negligible. The aim of this review is to summarize the recent advances in elucidating disease-specific mechanisms of actions of PE and IVIg in the treatment of immune-mediated neuropathies.
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Affiliation(s)
- Helmar C Lehmann
- Medical Faculty, Department of Neurology, Heinrich-Heine-University, Moorenstrasse 5, 40225 Düsseldorf, Germany.
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31
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Guillain-Barré syndrome after exposure to influenza virus. THE LANCET. INFECTIOUS DISEASES 2010; 10:643-51. [PMID: 20797646 DOI: 10.1016/s1473-3099(10)70140-7] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Guillain-Barré syndrome (GBS) is an acute, acquired, monophasic autoimmune disorder of peripheral nerves that develops in susceptible individuals after infection and, in rare cases, after immunisation. Exposure to influenza via infection or vaccination has been associated with GBS. We review the relation between GBS and these routes of exposure. Epidemiological studies have shown that, except for the 1976 US national immunisation programme against swine-origin influenza A H1N1 subtype A/NJ/76, influenza vaccine has probably not caused GBS or, if it has, rates have been extremely low (less than one case per million vaccine recipients). By contrast, influenza-like illnesses seem to be relevant triggering events for GBS. The concerns about the risk of inducing GBS in mass immunisation programmes against H1N1 2009 do not, therefore, seem justified by the available epidemiological data. However, the experiences from the 1976 swine flu vaccination programme emphasise the importance for active and passive surveillance to monitor vaccine safety.
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Weiman S, Uchiyama S, Lin FYC, Chaffin D, Varki A, Nizet V, Lewis AL. O-Acetylation of sialic acid on Group B Streptococcus inhibits neutrophil suppression and virulence. Biochem J 2010; 428:163-8. [PMID: 20334627 PMCID: PMC3640289 DOI: 10.1042/bj20100232] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
GBS (Group B Streptococcus) requires capsular Sia (sialic acid) for virulence and partially modifies this sugar by O-acetylation. In the present paper we describe serotype-specific patterns of GBS Sia O-acetylation that can be manipulated by genetic and biochemical means. In vitro and in vivo assays demonstrate that this subtle modification attenuates GBS Sia-mediated neutrophil suppression and animal virulence.
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Affiliation(s)
- Shannon Weiman
- Department of Pediatrics, Glycobiology Research and Training Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093-0687, U.S.A
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Pithadia AB, Kakadia N. Guillain-Barré syndrome (GBS). Pharmacol Rep 2010; 62:220-32. [PMID: 20508277 DOI: 10.1016/s1734-1140(10)70261-9] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2009] [Revised: 10/20/2009] [Indexed: 10/25/2022]
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Meyer Zu Horste G, Heidenreich H, Lehmann HC, Ferrone S, Hartung HP, Wiendl H, Kieseier BC. Expression of antigen processing and presenting molecules by Schwann cells in inflammatory neuropathies. Glia 2010; 58:80-92. [PMID: 19544394 DOI: 10.1002/glia.20903] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Schwann cells are the myelinating glia cells of the peripheral nervous system (PNS) and can become targets of an autoimmune response in inflammatory neuropathies like the Guillain-Barré syndrome (GBS). Professional antigen presenting cells (APCs) are known to promote autoimmune responses in target tissues by presenting self-antigens. Other cell types could participate in local autoimmune responses by acting as nonprofessional APCs. Using a combined approach of immunocytochemistry, immunohistochemistry, and flow cytometry analysis we demonstrate that human Schwann cells express the antigen processing and presenting machinery (APM) in vitro and in vivo. Moreover, cultured human Schwann cells increase the expression of proteasome subunit delta (Y), antigen peptide transporter TAP2, and HLA Class I and HLA Class II complexes in an inflammatory environment. In correlation with this observation, Schwann cells in sural nerve biopsies from GBS patients show increased expression of antigen processing and presenting molecules. Furthermore, cultured human Schwann cells can proteolytically digest fluorescently-labeled nonmammalian antigen ovalbumin. Taken together, our data suggest antigen processing and presentation as a possible function of Schwann cells that may contribute to (auto)immune responses within peripheral nerves.
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35
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Assessment of the duration of protection in Campylobacter jejuni experimental infection in humans. Infect Immun 2010; 78:1750-9. [PMID: 20086085 DOI: 10.1128/iai.01021-09] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A human Campylobacter jejuni infection model provided controlled exposure to assess vaccine efficacy and investigate protective immunity for this important diarrheal pathogen. A well-characterized outbreak strain, C. jejuni 81-176, was investigated using a volunteer experimental infection model to evaluate the dose range and duration of protection. Healthy Campylobacter-seronegative adults received C. jejuni strain 81-176 via oral inoculation of 10(5), 10(7), or 10(9) CFU (5 adults/dose), which was followed by clinical and immunological monitoring. Based on dose range clinical outcomes, the 10(9)-CFU dose (n = 31) was used to assess homologous protection at 28 to 49 days (short-term veterans [STV]; n = 8) or 1 year (long-term veterans [LTV]; n = 7) after primary infection. An illness dose effect was observed for naïve subjects (with lower doses, 40 to 60% of the subjects were ill; with the 10(9)-CFU dose, 92% of the subjects were ill) along with complete protection for the STV group and attenuated illness for the LTV group (57%). Partial resistance to colonization was seen in STV (25% of the subjects were not infected; 3-log-lower maximum excretion level). Systemic and mucosal immune responses were robust in naïve subjects irrespective of the dose or the severity of illness. In contrast, in STV there was a lack of circulating antibody-secreting cells (ASC), reflecting the local mucosal effector responses. LTV exhibited comparable ASC responses to primary infection, and anamnestic fecal IgA responses likely contributed to self-resolving illness prior to antibiotic treatment. Campylobacter antigen-dependent production of gamma interferon by peripheral blood mononuclear cells was strongly associated with protection from illness, supporting the hypothesis that TH1 polarization has a primary role in acquired immunity to C. jejuni. This study revealed a C. jejuni dose-related increase in campylobacteriosis rates, evidence of complete short-term protection that waned with time, and immune response patterns associated with protection.
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Abstract
Both Helicobacter pylori and Campylobacter jejuni are highly prevalent Gram-negative microaerophilic bacteria which are gastrointestinal pathogens of humans; H. pylori colonizes the gastroduodenal compartment and C. jejuni the intestinal mucosa. Although H. pylori causes chronic gastric infection leading to gastritis, peptic ulcers and eventually gastric cancer while C. jejuni causes acute infection inducing diarrhoeal disease, the endotoxin molecules of both bacterial species contrastingly contribute to their pathogenesis and the autoimmune sequelae each induces. Compared with enterobacterial endotoxin, that of H. pylori has significantly lower endotoxic and immuno-activities, the molecular basis for which is the underphosphorylation and underacylation of the lipid A component that interacts with immune receptors. This induction of low immunological responsiveness by endotoxin may aid the prolongation of H. pylori infection and therefore infection chronicity. On the other hand, this contrasts with acute infection-causing C. jejuni where overt inflammation contributes to pathology and diarrhoea production, and whose endotoxin is immunologically and endotoxically active. Futhermore, both H. pylori and C. jejuni exhibit molecular mimicry in the saccharide components of their endotoxins which can induce autoreactive antibodies; H. pylori expresses mimicry of Lewis and some ABO blood group antigens, C. jejuni mimicry of gangliosides. The former has been implicated in influencing the development of inflammation and gastric atrophy (a precursor of gastic cancer), the latter is central to the development of the neurological disorder Guillain-Barré syndrome. Both diseases raise important questions concerning infection-induced autoimmunity awaiting to be addressed.
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Affiliation(s)
- Anthony P Moran
- Laboratory of Molecular Biochemistry, Microbiology, School of Natural Sciences, National University of Ireland, Galway, Ireland.
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Binary genomotyping using lipooligosaccharide biosynthesis genes distinguishes between Campylobacter jejuni isolates within poultry-associated multilocus sequence types. Epidemiol Infect 2009; 138:992-1003. [PMID: 19883521 DOI: 10.1017/s0950268809991075] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Campylobacter jejuni is a leading cause of human bacterial gastroenteritis throughout the industrialized world. We investigated whether or not differences in gene complement at the lipooligosaccharide (LOS) biosynthesis locus can identify epidemiologically useful binary genomotypes in 87 C. jejuni isolates from poultry-associated multilocus sequence types (STs) collected during the course of a sentinel surveillance study. Using a PCR-based approach, we correlated assignment of both isolate LOS locus class and binary genomotype with ST. We found that isolates within STs 45, 190, 354 and 474 displayed mosaicism in gene complement at the intra-ST level. For example, based upon their binary genomotypes, we assigned individual ST-45 isolates from human clinical cases as probably originating from either a poultry or wild-bird source. However, intra-ST mosaicism in gene complement was observed alongside broader patterns of congruence in LOS locus class and gene complement that distinguished between isolates from different STs.
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Kushi Y, Kamimiya H, Hiratsuka H, Nozaki H, Fukui H, Yanagida M, Hashimoto M, Nakamura K, Watarai S, Kasama T, Kajiwara H, Yamamoto T. Sialyltransferases of marine bacteria efficiently utilize glycosphingolipid substrates. Glycobiology 2009; 20:187-98. [PMID: 19837852 DOI: 10.1093/glycob/cwp160] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Bacterial sialyltransferases (STs) from marine sources were characterized using glycosphingolipids (GSLs). Bacterial STs were found to be beta-galacotoside STs. There were two types of STs: (1) ST obtained from strains such as ishi-224, 05JTC1 (#1), ishi-467, 05JTD2 (#2), and faj-16, 05JTE1 (#3), which form alpha2-3 sialic acid (Sia) linkages, named alpha2-3ST, (2) ST obtained from strains such as ISH-224, N1C0 (#4), pda-rec, 05JTB2 (#5), and pda-0160, 05JTA2 (#6), which form alpha2-6 Sia linkages, named alpha2-6ST. All STs showed affinity to neolacto- and lacto-series GSLs, particularly in neolactotetraosyl ceramide (nLc(4)Cer). No large differences were observed in the pH and temperature profiles of enzyme activities. Kinetic parameters obtained by Lineweaver-Burk plot analysis showed that #3 and #4 STs had practical synthetic activity and thus it became easily possible to achieve large-scale ganglioside synthesis (100-300 muM) using these recombinant enzymes. Gangliosides synthesized from nLc(4)Cer by alpha2-3 and alpha2-6STs were structurally characterized by several analytical and immunological methods, and they were identified as IV(3)alphaNeuAc-nLc(4)Cer(S2-3PG) and IV(6)alphaNeuAc-nLc(4)Cer (S2-6PG), respectively. Further characterization of these STs using lactotetraosylceramide (Lc(4)Cer), neolactohexaosylceramide (i antigen), and IV(6)kladoLc(8)Cer (I antigen) showed the synthesis of corresponding gangliosides as well. Synthesized gangliosides showed binding activity to the influenza A virus [A/panama/2007/99 (H3N2)] at a similar level to purified S2-3PG and S2-6PG from mammalian sources. The above evidence suggests that these STs have unique features, including substrate specificities restricted to lacto- and neolactoseries GSLs, as well as catalytic potentials for ganglioside synthesis. This demonstrates that efficient in vitro ganglioside synthesis could be a valuable tool for selectively synthesizing Sias modifications, thereby permitting the exploration of unknown functions.
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Affiliation(s)
- Yasunori Kushi
- Department of Agriculture and Life Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, 080-8555, Japan.
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Acute myocarditis secondary to Campylobacter jejuni enterocolitis. Resuscitation 2008; 79:165-7. [PMID: 18617316 DOI: 10.1016/j.resuscitation.2008.04.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2008] [Revised: 04/14/2008] [Accepted: 04/24/2008] [Indexed: 12/21/2022]
Abstract
Myocarditis is a rare condition that can mimic an acute coronary syndrome (ACS). We present the case of a 24-year-old male with Noonan syndrome who presented with a diarrhoeal pro-dromal illness, acute onset chest pain, elevated cardiac biomarkers and an abnormal ECG with ST elevation in the absence of obstructive coronary artery disease. The patient had acute myocarditis secondary to Campylobacter jejuni enterocolitis. Infective myocarditis is most commonly due to a viral infection. Myocarditis is very rarely due to a bacterial infection with only isolated reports of myocarditis induced by Campylobacter jejuni infection. At follow-up he remains well. Myocarditis should be considered in all patients presenting with acute onset chest pain and elevated cardiac biomarkers.
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Sialic acids in human health and disease. Trends Mol Med 2008; 14:351-60. [PMID: 18606570 DOI: 10.1016/j.molmed.2008.06.002] [Citation(s) in RCA: 706] [Impact Index Per Article: 44.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2008] [Revised: 06/06/2008] [Accepted: 06/06/2008] [Indexed: 12/19/2022]
Abstract
The surfaces of all vertebrate cells are decorated with a dense and complex array of sugar chains, which are mostly attached to proteins and lipids. Most soluble secreted proteins are also similarly decorated with such glycans. Sialic acids are a diverse family of sugar units with a nine-carbon backbone that are typically found attached to the outermost ends of these chains. Given their location and ubiquitous distribution, sialic acids can mediate or modulate a wide variety of physiological and pathological processes. This review considers some examples of their established and newly emerging roles in aspects of human physiology and disease.
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Role of Cj1211 in natural transformation and transfer of antibiotic resistance determinants in Campylobacter jejuni. Antimicrob Agents Chemother 2008; 52:2699-708. [PMID: 18505858 DOI: 10.1128/aac.01607-07] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Campylobacter jejuni, an important food-borne human pathogen, is increasingly resistant to antimicrobials. Natural transformation is considered to be a main mechanism for mediating the transfer of genetic materials encoding antibiotic resistance determinants in C. jejuni, but direct evidence for this notion is still lacking. In this study, we determined the role of Cj1211 in natural transformation and in the development of antibiotic resistance in C. jejuni. Insertional mutagenesis of Cj1211, a Helicobacter pylori ComH3 homolog, abolished natural transformation in C. jejuni. In vitro coculture of C. jejuni strains carrying either kanamycin or tetracycline resistance markers demonstrated the development of progenies that were resistant to both antibiotics, indicating that the horizontal transfer of antibiotic resistance determinants actively occurs in mixed Campylobacter populations. A mutation of Cj1211 or the addition of DNase I in culture media completely inhibited the formation of progenies that were resistant to both antibiotics, indicating that the horizontal transfer of the resistance determinants is mediated by natural transformation. Interestingly, the mutation of Cj1211 also reduced the frequency of emergence of spontaneous mutants that were resistant to fluoroquinolone (FQ) and streptomycin but did not affect the outcome of FQ resistance development under FQ treatment, suggesting that natural transformation does not play a major role in the emergence of FQ-resistant Campylobacter strains during treatment with FQ antimicrobials. These results define Cj1211 as a competence factor in Campylobacter, prove the role of natural transformation in the horizontal transfer of antibiotic resistance determinants in Campylobacter, and provide new insights into the mechanism underlying the development of FQ-resistant Campylobacter strains.
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Glycosyltransferase-catalyzed synthesis of bioactive oligosaccharides. Biotechnol Adv 2008; 26:436-56. [PMID: 18565714 DOI: 10.1016/j.biotechadv.2008.05.001] [Citation(s) in RCA: 124] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2008] [Revised: 02/14/2008] [Accepted: 05/09/2008] [Indexed: 02/07/2023]
Abstract
Mammalian cell surfaces are all covered with bioactive oligosaccharides which play an important role in molecular recognition events such as immune recognition, cell-cell communication and initiation of microbial pathogenesis. Consequently, bioactive oligosaccharides have been recognized as a medicinally relevant class of biomolecules for which the interest is growing. For the preparation of complex and highly pure oligosaccharides, methods based on the application of glycosyltransferases are currently recognized as being the most effective. The present paper reviews the potential of glycosyltransferases as synthetic tools in oligosaccharide synthesis. Reaction mechanisms and selected characteristics of these enzymes are described in relation to the stereochemistry of the transfer reaction and the requirements of sugar nucleotide donors. For the application of glycosyltransferases, accepted substrate profiles are summarized and the whole-cell approach versus isolated enzyme methodology is compared. Sialyltransferase-catalyzed syntheses of gangliosides and other sialylated oligosaccharides are described in more detail in view of the prominent role of these compounds in biological recognition.
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Toovey S. Influenza-associated central nervous system dysfunction: a literature review. Travel Med Infect Dis 2008; 6:114-24. [PMID: 18486065 DOI: 10.1016/j.tmaid.2008.03.003] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2008] [Accepted: 03/13/2008] [Indexed: 10/22/2022]
Abstract
CONTEXT Influenza is a viral pathogen that imposes an under-recognized burden of central nervous system (CNS) disease. OBJECTIVE To describe the epidemiology, clinical features and etiology of the CNS disease entities associated with influenza. DATA SOURCES English-language publications from MEDLINE. DATA EXTRACTION Articles were identified using "influenza, human"[Mesh] AND "nervous system diseases"[Mesh] and screened for inclusion based on relevance and scientific rigor. RESULTS Febrile seizure is the most frequently encountered influenza-associated CNS complication, with one in five children hospitalized with influenza experiencing one or more events. In most instances, symptoms resolve without neurological sequelae, although the risk for subsequent afebrile seizure may be increased. Influenza-associated encephalitis/encephalopathy is a less common but potentially more serious complication that is widely reported in Japanese populations, although cases from other East Asian countries, North America, and Europe have been described. Clinical manifestations are diverse, and typically involve febrile seizures and abnormal behaviors in mild cases, with rapid evolution through decreased consciousness to coma in severe forms. In cases of serious disease, the prognosis is often poor, with outcomes including death or severe neurological sequelae. Influenza is also a known trigger for a number of rarely encountered, yet often serious, CNS diseases, including the encephalopathic condition of Reye's syndrome, the peripheral neuropathy known as Guillain-Barré syndrome, and the lesser known complaints of Kleine-Levin syndrome and post-encephalitic Parkinson's disease. CONCLUSIONS Influenza imposes a sizeable burden of CNS disease. Increased awareness and monitoring of CNS function is indicated, especially in infants and young children.
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Tervo HM, Allespach I, Keppler OT. High-level transfection of primary rabbit T lymphocytes. J Immunol Methods 2008; 336:85-9. [PMID: 18471825 DOI: 10.1016/j.jim.2008.03.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2007] [Revised: 02/18/2008] [Accepted: 03/06/2008] [Indexed: 10/22/2022]
Abstract
Efficient gene delivery is essential for the assessment of transgene function in untransformed hematopoietic cells. Here, we explored the utility of different non-viral and viral gene delivery techniques for primary T cells from New Zealand White rabbits. We find that electroporation and nucleofection result in high-level transgene expression from both small and large GFP reporter constructs in activated rabbit T cells at moderate cytotoxicity. Both non-viral gene delivery methods were vastly superior to retroviral, lentiviral, or adenoviral transduction approaches. The effectiveness of non-viral gene delivery for functional analyses was demonstrated by downregulation of CD4 cell surface molecules through transient expression of the endocytosis-inducing Nef protein from human immunodeficiency virus in a signature motif-specific manner. This study establishes conventional electroporation as an efficient and inexpensive procedure to render primary rabbit T cells accessible to rapid functional ex vivo analyses.
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Affiliation(s)
- Hanna-Mari Tervo
- Department of Virology, University of Heidelberg, Heidelberg, Germany
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Haruta I, Kikuchi K, Hashimoto E, Kato H, Hirota K, Kobayashi M, Miyake Y, Uchiyama T, Yagi J, Shiratori K. A possible role of histone-like DNA-binding protein of Streptococcus intermedius in the pathogenesis of bile duct damage in primary biliary cirrhosis. Clin Immunol 2008; 127:245-51. [PMID: 18337173 DOI: 10.1016/j.clim.2008.01.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2007] [Revised: 12/10/2007] [Accepted: 01/11/2008] [Indexed: 10/22/2022]
Abstract
Bacterial infection has become a focus of attention in the pathogenesis of primary biliary cirrhosis (PBC). It was reported that anti-histone autoantibody was detected in PBC, suggesting that bacterial histone-like DNA-binding protein (HLP) may be involved in the pathogenesis of PBC. To identify bacterial species in PBC to confirm this possibility, serum reactivity to bacterial cells was studied by ELISA. The IgM class Streptococcus intermedius titers were significantly higher in PBC than chronic hepatitis due to hepatitis C virus (CH-C) and healthy subjects. Among the streptococci, S. intermedius was selected for further study. The antigenic peptide of S. intermedius of HLP was synthesized to examine the serum reactivity to Si-HLP. IgM class anti-Si-HLP peptide titers were significantly higher in PBC. Immunoreactivity to anti-Si-HLP was detected in the cytoplasm of biliary epithelial cells and inflammatory cells in the portal area in PBC patients' livers. Streptococci, especially S. intermedius, might play a key role in the pathogenesis of PBC, possibly involving HLP.
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Affiliation(s)
- Ikuko Haruta
- Department of Medicine and Gastroenterology, Tokyo Women's Medical University, Japan.
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Pukin AV, Weijers CA, van Lagen B, Wechselberger R, Sun B, Gilbert M, Karwaski MF, Florack DE, Jacobs BC, Tio-Gillen AP, van Belkum A, Endtz HP, Visser GM, Zuilhof H. GM3, GM2 and GM1 mimics designed for biosensing: chemoenzymatic synthesis, target affinities and 900MHz NMR analysis. Carbohydr Res 2008; 343:636-50. [DOI: 10.1016/j.carres.2008.01.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2007] [Revised: 12/24/2007] [Accepted: 01/07/2008] [Indexed: 11/30/2022]
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920 MHz ultra-high field NMR approaches to structural glycobiology. Biochim Biophys Acta Gen Subj 2007; 1780:619-25. [PMID: 18157953 DOI: 10.1016/j.bbagen.2007.11.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Revised: 10/25/2007] [Accepted: 11/19/2007] [Indexed: 11/23/2022]
Abstract
Although NMR spectroscopy has great potential to provide us with detailed structural information on oligosaccharides and glycoconjugates, the carbohydrate NMR analyses have been hampered by the severe spectral overlapping and the insufficiency of the conformational restraints. Recently, ultra-high field NMR spectrometers have become available for applications to structural analyses of biological macromolecules. Here we demonstrate that ultra-high fields offer not only increases in sensitivity and chemical shift dispersion but also potential benefits for providing unique information on chemical exchange and relaxation, by displaying NMR spectral data of oligosaccharide, glycoprotein, and glycolipid systems recorded at a 21.6 T magnetic field (corresponding to 920 MHz (1)H observation frequency). The ultra-high field NMR spectroscopy combined with sugar library and stable-isotope labeling approaches will open new horizons in structural glycobiology.
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Taboada EN, van Belkum A, Yuki N, Acedillo RR, Godschalk PC, Koga M, Endtz HP, Gilbert M, Nash JH. Comparative genomic analysis of Campylobacter jejuni associated with Guillain-Barré and Miller Fisher syndromes: neuropathogenic and enteritis-associated isolates can share high levels of genomic similarity. BMC Genomics 2007; 8:359. [PMID: 17919333 PMCID: PMC2174954 DOI: 10.1186/1471-2164-8-359] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2006] [Accepted: 10/05/2007] [Indexed: 11/19/2022] Open
Abstract
Background Campylobacter jejuni infection represents the most frequent antecedent infection triggering the onset of the neuropathic disorders Guillain-Barré syndrome (GBS) and Miller Fisher syndrome (MFS). Although sialylated ganglioside-mimicking lipo-oligosaccharide (LOS) structures are the strongest neuropathogenic determinants in C. jejuni, they do not appear to be the only requirement for a neuropathic outcome since strains capable of their production have been isolated from patients with uncomplicated cases of enteritis. Consequently, other pathogen and/or host-related factors contribute to the onset of neurological complications. We have used comparative genomic hybridization to perform a detailed genomic comparison of strains isolated from GBS/MFS and enteritis-only patients. Our dataset, in which the gene conservation profile for 1712 genes was assayed in 102 strains, including 56 neuropathogenic isolates, represents the largest systematic search for C. jejuni factors associated with GBS/MFS to date and has allowed us to analyze the genetic background of neuropathogenic C. jejuni strains with an unprecedented level of resolution. Results The majority of GBS/MFS strains can be assigned to one of six major lineages, suggesting that several genetic backgrounds can result in a neuropathogenic phenotype. A statistical analysis of gene conservation rates revealed that although genes involved in the sialylation of LOS structures were significantly associated with neuropathogenic strains, still many enteritis-control strains both bear these genes and share remarkable levels of genomic similarity with their neuropathogenic counterparts. Two capsule biosynthesis genes (Cj1421c and Cj1428c) showed higher conservation rates among neuropathogenic strains compared to enteritis-control strains. Any potential involvement of these genes in neuropathogenesis must be assessed. A single gene (HS:3 Cj1135) had a higher conservation rate among enteritis-control strains. This gene encodes a glucosyltransferase that is found in some of the LOS classes that do not express ganglioside mimics. Conclusion Our findings corroborate that neuropathogenic factors may be transferred between unrelated strains of different genetic background. Our results would also suggest that the failure of some strains isolated from uncomplicated cases of enteritis to elicit a neuropathic clinical outcome may be due to subtle genetic differences that silence their neuropathogenic potential and/or due to host-related factors. The microarray data has been deposited in NCBI's Gene Expression Omnibus under accession number GSE3579.
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Affiliation(s)
- Eduardo N Taboada
- Institute for Biological Sciences, National Research Council, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada.
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Nores GA, Lardone RD, Comín R, Alaniz ME, Moyano AL, Irazoqui FJ. Anti-GM1 antibodies as a model of the immune response to self-glycans. Biochim Biophys Acta Gen Subj 2007; 1780:538-45. [PMID: 18029096 DOI: 10.1016/j.bbagen.2007.09.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2007] [Revised: 09/10/2007] [Accepted: 09/11/2007] [Indexed: 10/22/2022]
Abstract
Glycans are a class of molecules with high structural variability, frequently found in the plasma membrane facing the extracellular space. Because of these characteristics, glycans are often considered as recognition molecules involved in cell social functions, and as targets of pathogenic factors. Induction of anti-glycan antibodies is one of the early events in immunological defense against bacteria that colonize the body. Because of this natural infection, antibodies recognizing a variety of bacterial glycans are found in sera of adult humans and animals. The immune response to glycans is restricted by self-tolerance, and no antibodies to self-glycans should exist in normal subjects. However, antibodies recognizing structures closely related to self-glycans do exist, and can lead to production of harmful anti-self antibodies. Normal human sera contain low-affinity anti-GM1 IgM-antibodies. Similar antibodies with higher affinity or different isotype are found in some neuropathy patients. Two hypotheses have been developed to explain the origin of disease-associated anti-GM1 antibodies. According to the "molecular mimicry" hypothesis, similarity between GM1 and Campylobacter jejuni lipopolysaccharide carrying a GM1-like glycan is the cause of Guillain-Barré syndrome associated with anti-GM1 IgG-antibodies. According to the "binding site drift" hypothesis, IgM-antibodies associated with disease originate through changes in the binding site of normally occurring anti-GM1 antibodies. We now present an "integrated" hypothesis, combining the "mimicry" and "drift" concepts, which satisfactorily explains most of the published data on anti-GM1 antibodies.
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Affiliation(s)
- Gustavo A Nores
- Departamento de Química Biológica Dr. Ranwel Caputto, CIQUIBIC, CONICET, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina.
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Meyer zu Hörste G, Hu W, Hartung HP, Lehmann HC, Kieseier BC. The immunocompetence of Schwann cells. Muscle Nerve 2007; 37:3-13. [PMID: 17823955 DOI: 10.1002/mus.20893] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Schwann cells are the myelinating glial cells of the peripheral nervous system that support and ensheath axons with myelin to enable rapid saltatory signal propagation in the axon. Immunocompetence, however, has only recently been recognized as an important feature of Schwann cells. An autoimmune response against components of the peripheral nervous system triggers disabling inflammatory neuropathies in patients and corresponding animal models. The immune system participates in nerve damage and disease manifestation even in non-inflammatory hereditary neuropathies. A growing body of evidence suggests that Schwann cells may modulate local immune responses by recognizing and presenting antigens and may also influence and terminate nerve inflammation by secreting cytokines. This review summarizes current knowledge on the interaction of Schwann cells with the immune system, which is involved in diseases of the peripheral nervous system.
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Affiliation(s)
- Gerd Meyer zu Hörste
- Department of Neurology, Heinrich-Heine-University, Moorenstrasse 5, 40225 Düsseldorf, Germany
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