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Krause JL, Engelmann B, Nunes da Rocha U, Pierzchalski A, Chang HD, Zenclussen AC, von Bergen M, Rolle-Kampczyk U, Herberth G. MAIT cell activation is reduced by direct and microbiota-mediated exposure to bisphenols. Environ Int 2022; 158:106985. [PMID: 34991247 DOI: 10.1016/j.envint.2021.106985] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 10/15/2021] [Accepted: 11/15/2021] [Indexed: 06/14/2023]
Abstract
Oral uptake is the primary route of human bisphenol exposure, resulting in an exposure of the intestinal microbiota and intestine-associated immune cells. Therefore, we compared the impact of bisphenol A (BPA), bisphenol F (BPF) and bisphenol S (BPS) on (i) intestinal microbiota, (ii) microbiota-mediated immunomodulatory effects and (iii) direct effects on mucosal-associated invariant T (MAIT) cells in vitro. We acutely exposed human fecal microbiota, Bacteroides thetaiotaomicron and Escherichia coli to BPA and its analogues BPF and BPS referring to the European tolerable daily intake (TDI), i.e. 2.3 µg/mL, 28.3 µg/mL and 354.0 µg/mL. Growth and viability of E. coli was most susceptible to BPF, whereas B.thetaiotaomicron and fecal microbiota were affected by BPA > BPF > BPS. At 354.0 µg/mL bisphenols altered microbial diversity in compound-specific manner and modulated microbial metabolism, with BPA already acting on metabolism at 28.3 µg/mL. Microbiota-mediated effects on MAIT cells were observed for the individual bacteria at 354.0 µg/mL only. However, BPA and BPF directly modulated MAIT cell responses at low concentrations, whereby bisphenols at concentrations equivalent for the current TDI had no modulatory effects for microbiota or for MAIT cells. Our findings indicate that acute bisphenol exposure may alter microbial metabolism and impact directly on immune cells.
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Affiliation(s)
- J L Krause
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Immunology, Leipzig, Germany; present address: German Rheumatism Research Center Berlin, a Leibniz Institute - DRFZ, Schwiete laboratory for microbiota and inflammation, Berlin, Germany
| | - B Engelmann
- Helmholtz-Centre for Environmental Research - UFZ, Department of Molecular Systems Biology, Leipzig, Germany
| | - U Nunes da Rocha
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Microbiology, Leipzig, Germany
| | - A Pierzchalski
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Immunology, Leipzig, Germany
| | - H D Chang
- present address: German Rheumatism Research Center Berlin, a Leibniz Institute - DRFZ, Schwiete laboratory for microbiota and inflammation, Berlin, Germany; Chair of Cytometry, Institute of Biotechnology, Technische Universität Berlin, Germany
| | - A C Zenclussen
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Immunology, Leipzig, Germany
| | - M von Bergen
- Helmholtz-Centre for Environmental Research - UFZ, Department of Molecular Systems Biology, Leipzig, Germany; Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Germany
| | - U Rolle-Kampczyk
- Helmholtz-Centre for Environmental Research - UFZ, Department of Molecular Systems Biology, Leipzig, Germany
| | - G Herberth
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Immunology, Leipzig, Germany.
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van Best N, Rolle-Kampczyk U, Schaap FG, Basic M, Olde Damink SWM, Bleich A, Savelkoul PHM, von Bergen M, Penders J, Hornef MW. Bile acids drive the newborn's gut microbiota maturation. Nat Commun 2020; 11:3692. [PMID: 32703946 PMCID: PMC7378201 DOI: 10.1038/s41467-020-17183-8] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 06/12/2020] [Indexed: 02/06/2023] Open
Abstract
Following birth, the neonatal intestine is exposed to maternal and environmental bacteria that successively form a dense and highly dynamic intestinal microbiota. Whereas the effect of exogenous factors has been extensively investigated, endogenous, host-mediated mechanisms have remained largely unexplored. Concomitantly with microbial colonization, the liver undergoes functional transition from a hematopoietic organ to a central organ of metabolic regulation and immune surveillance. The aim of the present study was to analyze the influence of the developing hepatic function and liver metabolism on the early intestinal microbiota. Here, we report on the characterization of the colonization dynamics and liver metabolism in the murine gastrointestinal tract (n = 6-10 per age group) using metabolomic and microbial profiling in combination with multivariate analysis. We observed major age-dependent microbial and metabolic changes and identified bile acids as potent drivers of the early intestinal microbiota maturation. Consistently, oral administration of tauro-cholic acid or β-tauro-murocholic acid to newborn mice (n = 7-14 per group) accelerated postnatal microbiota maturation.
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Affiliation(s)
- N van Best
- Institute of Medical Microbiology, RWTH University Hospital Aachen, RWTH University, Aachen, Germany
- Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands
| | - U Rolle-Kampczyk
- Department of Molecular Systems Biology, UFZ-Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - F G Schaap
- Department of General Surgery, NUTRIM, Maastricht University, Maastricht, The Netherlands
- Department of General, Visceral and Transplantation Surgery, RWTH University Hospital Aachen, Aachen, Germany
| | - M Basic
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - S W M Olde Damink
- Department of General Surgery, NUTRIM, Maastricht University, Maastricht, The Netherlands
- Department of General, Visceral and Transplantation Surgery, RWTH University Hospital Aachen, Aachen, Germany
| | - A Bleich
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - P H M Savelkoul
- Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands
| | - M von Bergen
- Department of Molecular Systems Biology, UFZ-Helmholtz Centre for Environmental Research, Leipzig, Germany
- Institute of Biochemistry, University of Leipzig, Leipzig, Germany
| | - J Penders
- Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands.
- School of Public Health and Primary Care, Maastricht University, Maastricht, The Netherlands.
| | - M W Hornef
- Institute of Medical Microbiology, RWTH University Hospital Aachen, RWTH University, Aachen, Germany.
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Mendler A, Pierzchalski A, Bauer M, Röder S, Sattler A, Standl M, Borte M, von Bergen M, Rolle‐Kampczyk U, Herberth G. MAIT cell activation in adolescents is impacted by bile acid concentrations and body weight. Clin Exp Immunol 2020; 200:199-213. [PMID: 32012235 PMCID: PMC7160656 DOI: 10.1111/cei.13423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2020] [Indexed: 12/29/2022] Open
Abstract
Bile acids (BAs) are produced by liver hepatocytes and were recently shown to exert functions additional to their well-known role in lipid digestion. As yet it is not known whether the mucosal-associated invariant T (MAIT) cells, which represent 10-15% of the hepatic T cell population, are affected by BAs. The focus of the present investigation was on the association of BA serum concentration with MAIT cell function and inflammatory parameters as well as on the relationship of these parameters to body weight. Blood samples from 41 normal weight and 41 overweight children of the Lifestyle Immune System Allergy (LISA) study were analyzed with respect to MAIT cell surface and activation markers [CD107a, CD137, CD69, interferon (IFN)-γ, tumor necrosis factor (TNF)-α] after Escherichia coli stimulation, mRNA expression of promyelocytic leukemia zinc finger protein (PLZF) and major histocompatibility complex class I-related gene protein (MR1), the inflammatory markers C-reactive protein (CRP), interleukin (IL)-8 and macrophage inflammatory protein (MIP)-1α as well as the concentrations of 13 conjugated and unconjugated BAs. Higher body weight was associated with reduced MAIT cell activation and expression of natural killer cell marker (NKp80) and chemokine receptor (CXCR3). BA concentrations were positively associated with the inflammatory parameters CRP, IL-8 and MIP-1α, but were negatively associated with the number of activated MAIT cells and the MAIT cell transcription factor PLZF. These relationships were exclusively found with conjugated BAs. BA-mediated inhibition of MAIT cell activation was confirmed in vitro. Thus, conjugated BAs have the capacity to modulate the balance between pro- and anti-inflammatory immune responses.
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Affiliation(s)
- A. Mendler
- Department of Environmental ImmunologyUFZ-Helmholtz Centre for Environmental Research LeipzigLeipzigGermany
| | - A. Pierzchalski
- Department of Environmental ImmunologyUFZ-Helmholtz Centre for Environmental Research LeipzigLeipzigGermany
| | - M. Bauer
- Department of Environmental ImmunologyUFZ-Helmholtz Centre for Environmental Research LeipzigLeipzigGermany
| | - S. Röder
- Department of Environmental ImmunologyUFZ-Helmholtz Centre for Environmental Research LeipzigLeipzigGermany
| | - A. Sattler
- Department for General, Visceral, and Vascular SurgeryCharité ‐ Universitätsmedizin BerlinBerlinGermany
| | - M. Standl
- Institute of EpidemiologyHelmholtz Zentrum München, German Research Center for Environmental HealthNeuherbergGermany
| | - M. Borte
- Children’s HospitalMunicipal Hospital ‘St Georg’Academic Teaching Hospital of the University of LeipzigLeipzigGermany
| | - M. von Bergen
- Department of Molecular Systems BiologyUFZ-Helmholtz Centre for Environmental Research LeipzigLeipzigGermany
- Institute of BiochemistryUniversity of LeipzigLeipzigGermany
| | - U. Rolle‐Kampczyk
- Department of Molecular Systems BiologyUFZ-Helmholtz Centre for Environmental Research LeipzigLeipzigGermany
| | - G. Herberth
- Department of Environmental ImmunologyUFZ-Helmholtz Centre for Environmental Research LeipzigLeipzigGermany
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Hoffmann M, Gebauer S, Nüchter M, Baber R, Ried J, von Bergen M, Kiess W. Endokrine Modulatoren. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2017; 60:640-648. [DOI: 10.1007/s00103-017-2551-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Hoeke H, Roeder S, Mueller A, Bertsche T, Borte M, Rolle-Kampczyk U, von Bergen M, Wissenbach DK. Biomonitoring of prenatal analgesic intake and correlation with infantile anti-aeroallergens IgE. Allergy 2016; 71:901-6. [PMID: 27012463 DOI: 10.1111/all.12897] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/17/2016] [Indexed: 11/28/2022]
Abstract
An association between prenatal acetaminophen or ibuprofen intake and an increased risk of asthma and increased IgE level in children is discussed in various epidemiological studies. Although the molecular mechanistic link is still unknown, the question whether or not acetaminophen and/or ibuprofen are safe pain medications during pregnancy arose. In this study, we associate maternal acetaminophen and ibuprofen intake during pregnancy and breastfeeding to infantile asthma phenotypes and elevated IgE level. Therefore, we analysed questionnaires from a local mother-child cohort and monitored drug intake by LC-MS biomonitoring in urine. No association was found between drug intake and any analysed health outcome using questionnaire data. For the information obtained from biomonitoring, no association was found for ibuprofen and acetaminophen intakes during breastfeeding. However, an association between prenatal acetaminophen intake and increased infantile IgEs related to aeroallergens was statistically detected, but not for asthma phenotypes.
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Affiliation(s)
- H. Hoeke
- Department of Pharmaceutical and Medicinal Chemistry; Institute of Pharmacy; University of Leipzig; Leipzig Germany
- Department of Molecular Systems Biology; Helmholtz Centre for Environmental Research -UFZ; Leipzig Germany
| | - S. Roeder
- Department of Environmental Immunology; Helmholtz Centre for Environmental Research -UFZ; Leipzig Germany
| | - A. Mueller
- Department of Molecular Systems Biology; Helmholtz Centre for Environmental Research -UFZ; Leipzig Germany
| | - T. Bertsche
- Department of Clinical Pharmacy; Institute of Pharmacy; University of Leipzig; Leipzig Germany
- Drug Safety Center; University Hospital Leipzig and University of Leipzig; Leipzig Germany
| | - M. Borte
- Children's Hospital; Municipal Hospital St. Georg Leipzig; Affiliated to the University of Leipzig; Leipzig Germany
| | - U. Rolle-Kampczyk
- Department of Molecular Systems Biology; Helmholtz Centre for Environmental Research -UFZ; Leipzig Germany
| | - M. von Bergen
- Department of Molecular Systems Biology; Helmholtz Centre for Environmental Research -UFZ; Leipzig Germany
- Department of Biotechnology; Chemistry and Environmental Engineering Aalborg University; Aalborg Denmark
- Institute of Biochemistry; Faculty of Biosciences; Pharmacy and Psychology; University of Leipzig; Leipzig Germany
| | - D. K. Wissenbach
- Department of Molecular Systems Biology; Helmholtz Centre for Environmental Research -UFZ; Leipzig Germany
- Institute of Forensic Medicine; University Hospital Jena; Jena Germany
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Rolle-Kampczyk UE, Krumsiek J, Otto W, Röder SW, Kohajda T, Borte M, Theis F, Lehmann I, von Bergen M. Metabolomics reveals effects of maternal smoking on endogenous metabolites from lipid metabolism in cord blood of newborns. Metabolomics 2016; 12:76. [PMID: 27065762 PMCID: PMC4783445 DOI: 10.1007/s11306-016-0983-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 12/17/2015] [Indexed: 01/13/2023]
Abstract
INTRODUCTION A general detrimental effect of smoking during pregnancy on the health of newborn children is well-documented, but the detailed mechanisms remain elusive. OBJECTIVES Beside the specific influence of environmental tobacco smoke derived toxicants on developmental regulation the impact on the metabolism of newborn children is of particular interest, first as a general marker of foetal development and second due to its potential predictive value for the later occurrence of metabolic diseases. METHODS Tobacco smoke exposure information from a questionnaire was confirmed by measuring the smoking related metabolites S-Phenyl mercapturic acid, S-Benzyl mercapturic acid and cotinine in maternal urine by LC-MS/MS. The impact of smoking on maternal endogenous serum metabolome and children's cord blood metabolome was assessed in a targeted analysis of 163 metabolites by an LC-MS/MS based assay. The anti-oxidative status of maternal serum samples was analysed by chemoluminiscence based method. RESULTS Here we present for the first time results of a metabolomic assessment of the cordblood of 40 children and their mothers. Several analytes from the group of phosphatidylcholines, namely PCaaC28:1, PCaaC32:3, PCaeC30:1, PCaeC32:2, PCaeC40:1, and sphingomyelin SM C26:0, differed significantly in mothers and children's sera depending on smoking status. In serum of smoking mothers the antioxidative capacity of water soluble compounds was not significantly changed while there was a significant decrease in the lipid fraction. CONCLUSION Our data give evidence that smoking during pregnancy alters both the maternal and children's metabolome. Whether the different pattern found in adults compared to newborn children could be related to different disease outcomes should be in the focus of future studies.
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Affiliation(s)
- Ulrike E. Rolle-Kampczyk
- Department of Metabolomics, Helmholtz Centre for Environmental Research – UFZ Leipzig, Leipzig, Germany
| | - Jan Krumsiek
- Institute of Computational Biology, Helmholtz Centre Munich & Mathematics, Oberschleißheim, Germany
| | - Wolfgang Otto
- Department of Proteomics, Helmholtz Centre for Environmental Research – UFZ Leipzig, Leipzig, Germany
| | - Stefan W. Röder
- Core Facility Studies, Helmholtz Centre for Environmental Research – UFZ Leipzig, Leipzig, Germany
| | - Tibor Kohajda
- Department of Metabolomics, Helmholtz Centre for Environmental Research – UFZ Leipzig, Leipzig, Germany
| | - Michael Borte
- Hospital “St. Georg” GmbH Leipzig, Academic Teaching Hospital of the University of Leipzig, Delitzscher Straße 141, 04129 Leipzig, Germany
| | - Fabian Theis
- Institute of Computational Biology, Helmholtz Centre Munich & Mathematics, Oberschleißheim, Germany
- TU Munich, Munich, Germany
| | - Irina Lehmann
- Core Facility Studies, Helmholtz Centre for Environmental Research – UFZ Leipzig, Leipzig, Germany
- Department of Environmental Immunology, Helmholtz Centre for Environmental Research – UFZ Leipzig, Leipzig, Germany
| | - M. von Bergen
- Department of Metabolomics, Helmholtz Centre for Environmental Research – UFZ Leipzig, Leipzig, Germany
- Department of Proteomics, Helmholtz Centre for Environmental Research – UFZ Leipzig, Leipzig, Germany
- Department of Environmental Immunology, Helmholtz Centre for Environmental Research – UFZ Leipzig, Leipzig, Germany
- Faculty of Biosciences, Pharmacy and Psychology, Institute of Biochemistry, Universität Leipzig, Leipzig, Germany
- Department of Chemistry and Bioscience, Center for Microbial Communities, Aalborg University, Aalborg, Denmark
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Bastida F, Jehmlich N, Lima K, Morris BEL, Richnow HH, Hernández T, von Bergen M, García C. The ecological and physiological responses of the microbial community from a semiarid soil to hydrocarbon contamination and its bioremediation using compost amendment. J Proteomics 2015. [PMID: 26225916 DOI: 10.1016/j.jprot.2015.07.023] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The linkage between phylogenetic and functional processes may provide profound insights into the effects of hydrocarbon contamination and biodegradation processes in high-diversity environments. Here, the impacts of petroleum contamination and the bioremediation potential of compost amendment, as enhancer of the microbial activity in semiarid soils, were evaluated in a model experiment. The analysis of phospholipid fatty-acids (PLFAs) and metaproteomics allowed the study of biomass, phylogenetic and physiological responses of the microbial community in polluted semiarid soils. Petroleum pollution induced an increase of proteobacterial proteins during the contamination, while the relative abundance of Rhizobiales lowered in comparison to the non-contaminated soil. Despite only 0.55% of the metaproteome of the compost-treated soil was involved in biodegradation processes, the addition of compost promoted the removal of polycyclic aromatic hydrocarbons (PAHs) and alkanes up to 88% after 50 days. However, natural biodegradation of hydrocarbons was not significant in soils without compost. Compost-assisted bioremediation was mainly driven by Sphingomonadales and uncultured bacteria that showed an increased abundance of catabolic enzymes such as catechol 2,3-dioxygenases, cis-dihydrodiol dehydrogenase and 2-hydroxymuconic semialdehyde. For the first time, metaproteomics revealed the functional and phylogenetic relationships of petroleum contamination in soil and the microbial key players involved in the compost-assisted bioremediation.
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Affiliation(s)
- F Bastida
- Department of Soil and Water Conservation, Centro de Edafología y Biología Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo, Aptdo. de Correos 164, Espinardo, 30100 Murcia, Spain; Department of Agroforestry Technology and Science and Genetics, School of Advanced Agricultural Engineering, Castilla La Mancha University, Campus Universitario s/n, Albacete, Spain.
| | - N Jehmlich
- Department of Proteomics, Helmholtz - Centre for Environmental Research - UFZ, Permoserstrasse 15, D-04318 Leipzig, Germany
| | - K Lima
- Department of Soil and Water Conservation, Centro de Edafología y Biología Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo, Aptdo. de Correos 164, Espinardo, 30100 Murcia, Spain
| | - B E L Morris
- Dow Microbial Control, Dow Europe GmbH, Bachtobelstrasse 3, 8810 Horgen, Switzerland
| | - H H Richnow
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research - UFZ, Permoserstr. 15, 04318 Leipzig, Germany
| | - T Hernández
- Department of Soil and Water Conservation, Centro de Edafología y Biología Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo, Aptdo. de Correos 164, Espinardo, 30100 Murcia, Spain
| | - M von Bergen
- Department of Proteomics, Helmholtz - Centre for Environmental Research - UFZ, Permoserstrasse 15, D-04318 Leipzig, Germany; Department of Metabolomics, Helmholtz Centre for Environmental Research - UFZ, Permoserstr. 15, 04318 Leipzig, Germany
| | - C García
- Department of Soil and Water Conservation, Centro de Edafología y Biología Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo, Aptdo. de Correos 164, Espinardo, 30100 Murcia, Spain
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Weisse K, Winkler S, Hirche F, Herberth G, Hinz D, Bauer M, Röder S, Rolle-Kampczyk U, von Bergen M, Olek S, Sack U, Richter T, Diez U, Borte M, Stangl GI, Lehmann I. Maternal and newborn vitamin D status and its impact on food allergy development in the German LINA cohort study. Allergy 2013; 68:220-8. [PMID: 23253182 DOI: 10.1111/all.12081] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/18/2012] [Indexed: 12/18/2022]
Abstract
BACKGROUND Vitamin D levels are known to be associated with atopic disease development; however, existing data are controversial. The aim of this study was to investigate whether corresponding maternal and cord blood vitamin D levels are associated with atopic outcomes in early infancy. METHODS Within the LINA cohort study (Lifestyle and environmental factors and their Influence on Newborns Allergy risk), 25(OH)D was measured in blood samples of 378 mother-child pairs during pregnancy and at birth. Information about children's atopic manifestations during the first 2 years of life was obtained from questionnaires filled out by the parents during pregnancy and annually thereafter. Cord blood regulatory T cells (Treg) were detected by methylation-specific PCR using a Treg-specific demethylated region in the FOXP3 gene. RESULTS The median maternal 25(OH)D(3) level was 22.19 ng/ml (IQR 14.40-31.19 ng/ml); the median cord blood 25(OH)D(3) 10.95 ng/ml (6.99-17.39 ng/ml). A high correlation was seen between maternal and cord blood 25(OH)D(3) levels, both showing a seasonal distribution. Maternal and cord blood 25(OH)D(3) was positively associated with children's risk for food allergy within the first 2 years. Further, higher maternal 25(OH)D(3) resulted in a higher risk for sensitization against food allergens at the age of two. Cord blood 25(OH)D(3) levels were negatively correlated with regulatory T cell numbers. CONCLUSION Our study demonstrates that high vitamin D levels in pregnancy and at birth may contribute to a higher risk for food allergy and therefore argues against vitamin D supplement to protect against allergy.
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Affiliation(s)
- K. Weisse
- Department of Environmental Immunology; Helmholtz Centre for Environmental Research - UFZ; Leipzig
| | | | - F. Hirche
- Institute for Agricultural and Nutritional Sciences; Martin-Luther-University Halle-Wittenberg; Halle (Saale)
| | - G. Herberth
- Department of Environmental Immunology; Helmholtz Centre for Environmental Research - UFZ; Leipzig
| | - D. Hinz
- Department of Environmental Immunology; Helmholtz Centre for Environmental Research - UFZ; Leipzig
| | - M. Bauer
- Department of Environmental Immunology; Helmholtz Centre for Environmental Research - UFZ; Leipzig
| | - S. Röder
- Core Facility Studies; Helmholtz Centre for Environmental Research - UFZ; Leipzig
| | - U. Rolle-Kampczyk
- Department of Metabolomics; Helmholtz Centre for Environmental Research - UFZ; Leipzig
| | - M. von Bergen
- Department of Metabolomics; Helmholtz Centre for Environmental Research - UFZ; Leipzig
| | - S. Olek
- Ivana Tuerbachova Laboratory for Epigenetics; Epiontis GmbH; Berlin
| | - U. Sack
- Medical Faculty; Institute for Clinical Immunology; University of Leipzig; Leipzig
| | - T. Richter
- Children's Hospital; Municipal Hospital “St. Georg”; Leipzig; Germany
| | - U. Diez
- Children's Hospital; Municipal Hospital “St. Georg”; Leipzig; Germany
| | - M. Borte
- Children's Hospital; Municipal Hospital “St. Georg”; Leipzig; Germany
| | - G. I. Stangl
- Institute for Agricultural and Nutritional Sciences; Martin-Luther-University Halle-Wittenberg; Halle (Saale)
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Tomm JM, Krause C, Simon JC, Treudler R, von Bergen M, Averbeck M. Pyruvate kinase and phosphopyruvate hydratase as novel IgE reactive proteins in prawn. J Investig Allergol Clin Immunol 2013; 23:443-445. [PMID: 24459825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Affiliation(s)
- J M Tomm
- Department of Proteomics, Helmholtz-Centre for Environmental Research, Leipzig, Germany.
| | - C Krause
- Department of Proteomics, Helmholtz-Centre for Environmental Research, Leipzig, Germany
| | - J C Simon
- Department of Dermatology, Venereology and Allergology, University of Leipzig, Leipzig, Germany
| | - R Treudler
- Department of Dermatology, Venereology and Allergology, University of Leipzig, Leipzig, Germany
| | - M von Bergen
- Department of Proteomics, Helmholtz-Centre for Environmental Research, Leipzig, Germany
| | - M Averbeck
- Department of Dermatology, Venereology and Allergology, University of Leipzig, Leipzig, Germany
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Tomm JM, van Do T, Jende C, Simon JC, Treudler R, von Bergen M, Averbeck M. Identification of new potential allergens from Nile perch (Lates niloticus) and cod (Gadus morhua). J Investig Allergol Clin Immunol 2013; 23:159-167. [PMID: 23967754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
BACKGROUND Globalization of the food industry has led to widespread exposure to new nondomestic fish species; therefore, identification of potential allergens is necessary in order to diagnose allergic reactions. OBJECTIVE Contact with a patient who was allergic to Nile perch (Lates niloticus) prompted us to investigate the immunoglobulin (Ig) E-reactive proteins that could be allergens of this species. METHODS 2D gel electrophoresis was used to separate the muscle proteins of L niloticus and Gadus morhua. Immunoblotting was performed with sera from 12 patients with a history of immediate-type allergic reaction to fish and from atopic and nonatopic controls. IgE-reactive proteins were detected and identified using mass spectrometry. RESULTS The index patient had low levels of IgE binding to parvalbumins. However, 8 putative allergens other than parvalbumin from L niloticus and 5 from G morhua were identified. Further investigation revealed cross-sensitivity to enolase 3 from L niloticus in 7 of the 12 fish-allergic individuals (58%), whereas 11 of the 12 patients (92%) were sensitized to enolase 3 from G morhua. However, atopic control patients were also sensitized to enolase 3 from L niloticus and G morhua. CONCLUSION Identification of species-specific allergens and individual sensitization could help us to improve avoidance strategies.
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Affiliation(s)
- J M Tomm
- Department of Proteomics, Helmholtz-Centre for Environmental Research, Leipzig, Germany
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Weisse K, Lehmann I, Heroux D, Kohajda T, Herberth G, Röder S, von Bergen M, Borte M, Denburg J. The LINA cohort: indoor chemical exposure, circulating eosinophil/basophil (Eo/B) progenitors and early life skin manifestations. Clin Exp Allergy 2012; 42:1337-46. [PMID: 22925320 DOI: 10.1111/j.1365-2222.2012.04024.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Hematopoietic progenitor cells, especially those committed to the Eo/B lineage, are known to contribute to allergic inflammation. OBJECTIVE The aim of the present study was to investigate whether environmental factors are associated with changes in numbers of circulating Eo/B progenitors at 1 year of age. METHODS Peripheral blood from 60 1-year-old children enrolled in the LINA (Lifestyle and environmental factors and their Influence on Newborns Allergy risk) birth cohort was assessed for Eo/B progenitor cells (Eo/B CFU) using standardized and validated methylcellulose assays. Frozen peripheral blood mononuclear cells (PBMC) were cultured in the presence of IL-3, IL-5 or GM-CSF, and Eo/B CFUs enumerated. Clinical outcomes and exposure to environmental tobacco smoke (ETS) were documented by standardized questionnaires, and indoor volatile organic compound (VOC) concentrations were assessed by passive sampling. RESULTS Children with skin manifestations (atopic dermatitis or cradle cap) within the first year of life had higher numbers of circulating IL-3-, IL-5- or GM-CSF-stimulated Eo/B CFUs (P < 0.05) at 1 year. In children with cradle cap, a positive correlation was found between Eo/B CFUs and exposure to ETS-related VOCs during pregnancy or at 1 year of age (P < 0.05). CONCLUSIONS AND CLINICAL RELEVANCE This is the first demonstration that environmental exposures are positively associated with levels of circulating Eo/B progenitors. The recruitment and differentiation of Eo/B progenitors in response to environmental triggers may play a role in the development of skin manifestations during the first year of life.
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Affiliation(s)
- K Weisse
- Helmholtz Centre for Environmental Research - UFZ, Department of Environmental Immunology, Leipzig, Germany
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12
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Boll K, Reiche K, Kasack K, Mörbt N, Kretzschmar AK, Tomm JM, Verhaegh G, Schalken J, von Bergen M, Horn F, Hackermüller J. MiR-130a, miR-203 and miR-205 jointly repress key oncogenic pathways and are downregulated in prostate carcinoma. Oncogene 2012; 32:277-85. [PMID: 22391564 DOI: 10.1038/onc.2012.55] [Citation(s) in RCA: 172] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
With ∼30 000 deaths annually in the United States, prostate cancer (PCa) is a major oncologic disease. Here we show that the microRNAs miR-130a, miR-203 and miR-205 jointly interfere with the two major oncogenic pathways in prostate carcinoma and are downregulated in cancer tissue. Using transcriptomics we show that the microRNAs repress several gene products known to be overexpressed in this cancer. Argonaute 2 (AGO2) co-immunoprecipitation, reporter assays and western blot analysis demonstrate that the microRNAs directly target several components of the mitogen-activated protein kinase (MAPK) and androgen receptor (AR) signaling pathways, among those several AR coregulators and HRAS (Harvey rat sarcoma viral oncogene homolog), and repress signaling activity. Both pathways are central for the development of the primary tumor and in particular the progression to its incurable castration-resistant form. Reconstitution of the microRNAs in LNCaP PCa cells induce morphological changes, which resemble the effect of androgen deprivation, and jointly impair tumor cell growth by induction of apoptosis and cell cycle arrest. We therefore propose that these microRNAs jointly act as tumor suppressors in prostate carcinoma and might interfere with progression to castration resistance.
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Affiliation(s)
- K Boll
- RNomics Group, Fraunhofer IZI, Leipzig, Germany
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13
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Küntzel C, Friebe D, Landgraf K, Kalkhof S, Baumann S, Kiess W, Bergen MV, Körner A. SGBS cell differentiation – a model for adipogenesis – studied by quantitative proteomics and metabolomics. DIABETOL STOFFWECHS 2011. [DOI: 10.1055/s-0031-1280961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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14
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Leibeling S, Taubert M, Seifert J, von Bergen M, Harms H, Müller R. Adaptation of the herbicide-degrading strain delftia acidovorans mc1 through carbonylation of rdpa as key enzyme. J Biotechnol 2010. [DOI: 10.1016/j.jbiotec.2010.09.160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Schramedei K, Mörbt N, von Bergen M, Horn F, Brocke-Heidrich K. Identification of targets of microRNA-21 by 2-DIGE analysis. N Biotechnol 2010. [DOI: 10.1016/j.nbt.2010.01.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Oberbach A, Lehmann S, Till H, Schlichting N, Kovacs P, Schleinitz D, Breitfeld J, Binder H, Wirth H, Bergen MV, Fitzl G, Neuhaus J, Blüher M. Die Zerstörung mitochondrialer Strukturen der Skelettmuskulatur als zentraler Bestandteil im Pathomechanismus des Typ 2 Diabetes mellitus. DIABETOL STOFFWECHS 2010. [DOI: 10.1055/s-0030-1253791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Blumert C, Mörbt N, von Bergen M, Horn F. Combination of SILAC and in situ biotinylation to detect specific protein interacions. Cell Commun Signal 2009. [PMCID: PMC4291592 DOI: 10.1186/1478-811x-7-s1-a11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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18
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Lehmann S, Fitzl G, Bergen MV, Blüher M, Oberbach A. Proteomanalyse und deren Relation zu ultralstrukturellen Anpassungsmechanismen im Skelettmuskel bei Typ 2 Diabetes. DIABETOL STOFFWECHS 2009. [DOI: 10.1055/s-0029-1221864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Sträuber H, Hübschmann T, Jehmlich N, Schmidt F, von Bergen M, Harms H, Müller S. NBDT (3-(N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino)-3-toluene)-A novel fluorescent dye for studying mechanisms of toluene uptake into vital bacteria. Cytometry A 2009; 77:113-20. [DOI: 10.1002/cyto.a.20811] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Abstract
BACKGROUND Indoor mould growth and dampness are associated with respiratory health effects and allergies and several studies demonstrated that mainly Aspergillus versicolor and Penicillium expansum are responsible for indoor mould exposure. In contrast, commercialized test systems to diagnose allergic reactions to this mould species are not available. In this study, allergenic proteins from spores of the indoor relevant species A. versicolor and P. expansum should get detected and identified. METHODS We used two-dimensional (2D)-gel electrophoresis of spore proteins and immunoblotting with sera from patients participating in an epidemiologic study about indoor exposure of moulds and their influence on the development of allergies (ESTERSPEGA). Sera were screened for IgE antibodies specific for proteins from A. versicolor, A. fumigatus and P. expansum in one-dimensional blots and in 2D immunoblots. From the 2D gels, the corresponding spots were picked and identified by mass spectrometry. RESULTS More than 20 allergens from A. versicolor were identified; in particular, seven major allergens were selected, which were detected by more than 90% of the positive sera. The most abundant allergen was glyceraldehyde-3-phosphate dehydrogenase, followed by an unnamed protein, which displays a high homology to sobitol/xylose reductase. The other allergens were identified as catalase A, hypothetical protein AN6918.2, enolase, hypothetical protein AN0297.2 and a protein with homology to a fungal malate dehydrogenase. CONCLUSIONS The results indicate an important role of spore proteins from A. versicolor for sensitization against indoor moulds and identification of the major allergens might enable species-specific diagnosis of allergic reactions.
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Affiliation(s)
- D Benndorf
- Department of Proteomics, UFZ - Centre for Environmental Research Leipzig-Halle, Leipzig, Germany
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21
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Martin C, Pecyna M, Kellner H, Jehmlich N, Junghanns C, Benndorf D, von Bergen M, Schlosser D. Purification and biochemical characterization of a laccase from the aquatic fungus Myrioconium sp. UHH 1-13-18-4 and molecular analysis of the laccase-encoding gene. Appl Microbiol Biotechnol 2007; 77:613-24. [PMID: 17955194 DOI: 10.1007/s00253-007-1207-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2007] [Revised: 09/12/2007] [Accepted: 09/13/2007] [Indexed: 11/25/2022]
Abstract
Myrioconium sp. strain UHH 1-13-18-4 is an ascomycete anamorph isolated from the river Saale, Central Germany. An extracellular, monomeric, and glycosylated laccase with a molecular mass of 72.7 kDa as determined by matrix-assisted laser desorption/ionization-time of flight-mass spectrometry and an isoelectric point below 2.8 was purified from CuSO(4) and vanillic acid amended liquid fungal cultures grown in malt extract medium. The catalytic efficiencies (k(cat)/K(m)) for the oxidation of syringaldazine, 2,6-dimethoxyphenol, and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonate) were 67.3, 46.9, and 28.2 s(-1) mM(-1), respectively, with K(m) values of 4.2, 67.8, and 104.9 microM. After pre-incubation at different pH values and temperatures for 1 h, more than 80% of the initial laccase activity was retained between pH 4 to 6 and 15 degrees C. The laccase-encoding gene was identified and sequenced at both the genomic and complementary DNA (cDNA) level, and corresponding structural characteristics and putative regulatory elements of the promoter region are reported. The identification of two tryptic peptides of the purified enzyme by mass spectrometry confirmed the identity of the functional laccase protein with the translated genomic sequence of the Myrioconium sp. laccase. Myrioconium sp. laccase shows the highest degree of identity with laccases from ascomycetes belonging to the family Sclerotiniaceae, order Helotiales.
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Affiliation(s)
- C Martin
- UFZ, Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ, Permoserstr. 15, 04318, Leipzig, Germany.
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22
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Schäfer F, Breuer U, Benndorf D, von Bergen M, Harms H, Müller R. Growth ofAquincola tertiaricarbonis L108 ontert-Butyl Alcohol Leads to the Induction of a Phthalate Dioxygenase-related Protein and its Associated Oxidoreductase Subunit. Eng Life Sci 2007. [DOI: 10.1002/elsc.200700011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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von Bergen M, Barghorn S, Jeganathan S, Mandelkow EM, Mandelkow E. Spectroscopic Approaches to the Conformation of Tau Protein in Solution and in Paired Helical Filaments. NEURODEGENER DIS 2006; 3:197-206. [PMID: 17047358 DOI: 10.1159/000095257] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The abnormal aggregation of the microtubule-associated protein tau into paired helical filaments is one the hallmarks of Alzheimer's disease. This aggregation is based in the partial formation of beta-structure. In contrast, the soluble protein shows a mostly random coil structure, as judged by circular dichroism, Fourier transform infrared, X-ray scattering and biochemical assays. Here, we review the basis of the natively unstructured character of tau, as well as recent studies of residual structure and long-range interactions between different domains of the protein. Analysis of the primary structure reveals a very low content of hydrophobic amino acids and a high content of charged residues, both of which tend to counteract a well-folded globular state of proteins. In the case of tau, the low overall hydrophobicity is sufficient to explain the lack of folding. This is in contrast to other proteins which also carry an excess charge at physiological pH. By tryptophan scanning mutagenesis and fluorimetry we found that most of the sequence is solvent exposed. Analysis of the hydrodynamic radii confirms a mostly random coil structure of various tau isoforms and tau domains. The proteins can be further expanded by denaturation with GdHCl which indicates some global folding. This was substantiated by a FRET-based approach where the distances between different domains of tau were determined. The combined data show that tau is mostly disordered and flexible but tends to assume a hairpin-like overall fold which may be important in the transition to a pathological aggregate.
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Affiliation(s)
- M von Bergen
- Max Planck Unit for Structural Molecular Biology, Hamburg, Germany
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24
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Mundhenke C, Meinhold-Heerlein I, Bergen MV, König C, Jonat W, Maass N. Nachweis von DCIS und invasiv ductalen Mammakarzinomen durch Proteinprofiling des Serums (SELDI). Geburtshilfe Frauenheilkd 2005. [DOI: 10.1055/s-2005-920848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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25
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von Bergen M, Barghorn S, Li L, Marx A, Biernat J, Mandelkow EM, Mandelkow E. Mutations of tau protein in frontotemporal dementia promote aggregation of paired helical filaments by enhancing local beta-structure. J Biol Chem 2001; 276:48165-74. [PMID: 11606569 DOI: 10.1074/jbc.m105196200] [Citation(s) in RCA: 415] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The microtubule-associated protein tau is a natively unfolded protein in solution, yet it is able to polymerize into the ordered paired helical filaments (PHF) of Alzheimer's disease. In the splice isoforms lacking exon 10, this process is facilitated by the formation of beta-structure around the hexapeptide motif PHF6 ((306)VQIVYK(311)) encoded by exon 11. We have investigated the structural requirements for PHF polymerization in the context of adult tau isoforms containing four repeats (including exon 10). In addition to the PHF6 motif there exists a related PHF6* motif ((275)VQIINK(280)) in the repeat encoded by the alternatively spliced exon 10. We show that this PHF6* motif also promotes aggregation by the formation of beta-structure and that there is a cross-talk between the two hexapeptide motifs during PHF aggregation. We also show that two of the tau mutations found in hereditary frontotemporal dementias, DeltaK280 and P301L, have a much stronger tendency for PHF aggregation which correlates with their high propensity for beta-structure around the hexapeptide motifs.
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Affiliation(s)
- M von Bergen
- Max-Planck-Unit for Structural Molecular Biology, Notkestrasse 85, 22607 Hamburg, Germany
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26
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Barghorn S, Zheng-Fischhöfer Q, Ackmann M, Biernat J, von Bergen M, Mandelkow EM, Mandelkow E. Structure, microtubule interactions, and paired helical filament aggregation by tau mutants of frontotemporal dementias. Biochemistry 2000; 39:11714-21. [PMID: 10995239 DOI: 10.1021/bi000850r] [Citation(s) in RCA: 243] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have studied biochemical and structural parameters of several missense and deletion mutants of tau protein (G272V, N279K, DeltaK280, P301L, V337M, R406W) found in frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17). The mutant proteins were expressed on the basis of both full-length tau (htau40) and constructs derived from the repeat domain. They were analyzed with respect to the capacity to enhance microtubule assembly, binding of tau to microtubules, secondary structure content, and aggregation into Alzheimer-like paired helical or straight filaments. We find that the mutations cause a moderate decrease in microtubule interactions and stabilization, and they show no gross structural changes compared with the natively unfolded conformation of the wild-type protein, but the aggregation into PHFs is strongly enhanced, particularly for the mutants DeltaK280 and P301L. This gain of pathological aggregation would be consistent with the autosomal dominant nature of the disease.
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Affiliation(s)
- S Barghorn
- Max-Planck-Unit for Structural Molecular Biology, c/o DESY, Notkestrasse 85, D-22607 Hamburg, Germany
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27
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Abstract
Over the past few years the systematic investigation of paired helical filament assembly from tau protein in vitro has become feasible. We review our current understanding of the structure and conformations of tau protein and how this affects tau's assembly into the pathological paired helical filaments in Alzheimer's disease.
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Affiliation(s)
- P Friedhoff
- Max-Planck-Unit for Structural Molecular Biology, Hamburg, Germany
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28
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von Bergen M, Friedhoff P, Biernat J, Heberle J, Mandelkow EM, Mandelkow E. Assembly of tau protein into Alzheimer paired helical filaments depends on a local sequence motif ((306)VQIVYK(311)) forming beta structure. Proc Natl Acad Sci U S A 2000; 97:5129-34. [PMID: 10805776 PMCID: PMC25793 DOI: 10.1073/pnas.97.10.5129] [Citation(s) in RCA: 716] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/1999] [Indexed: 01/20/2023] Open
Abstract
We have searched for a minimal interaction motif in tau protein that supports the aggregation into Alzheimer-like paired helical filaments. Digestion of the repeat domain with different proteases yields a GluC-induced fragment comprising 43 residues (termed PHF43), which represents the third repeat of tau plus some flanking residues. This fragment self assembles readily into thin filaments without a paired helical appearance, but these filaments are highly competent to nucleate bona fide PHFs from full-length tau. Probing the interactions of PHF43 with overlapping peptides derived from the full tau sequence yields a minimal hexapeptide interaction motif of (306)VQIVYK(311) at the beginning of the third internal repeat. This motif coincides with the highest predicted beta-structure potential in tau. CD and Fourier transform infrared spectroscopy shows that PHF43 acquires pronounced beta structure in conditions of self assembly. Point mutations in the hexapeptide region by proline-scanning mutagenesis prevent the aggregation. The data indicate that PHF assembly is initiated by a short fragment containing the minimal interaction motif forming a local beta structure embedded in a largely random-coil protein.
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Affiliation(s)
- M von Bergen
- Max Planck Unit for Structural Molecular Biology, Notkestrasse 85, 22607 Hamburg, Germany
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29
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Schneider A, Biernat J, von Bergen M, Mandelkow E, Mandelkow EM. Phosphorylation that detaches tau protein from microtubules (Ser262, Ser214) also protects it against aggregation into Alzheimer paired helical filaments. Biochemistry 1999; 38:3549-58. [PMID: 10090741 DOI: 10.1021/bi981874p] [Citation(s) in RCA: 391] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
One of the hallmarks of Alzheimer's disease is the abnormal state of the microtubule-associated protein tau in neurons. It is both highly phosphorylated and aggregated into paired helical filaments, and it is commonly assumed that the hyperphosphorylation of tau causes its detachment from microtubules and promotes its assembly into PHFs. We have studied the relationship between the phosphorylation of tau by several kinases (MARK, PKA, MAPK, GSK3) and its assembly into PHFs. The proline-directed kinases MAPK and GSK3 are known to phosphorylate most Ser-Pro or Thr-Pro motifs in the regions flanking the repeat domain of tau: they induce the reaction with several antibodies diagnostic of Alzheimer PHFs, but this type of phosphorylation has only a weak effect on tau-microtubule interactions and on PHF assembly. By contrast, MARK and PKA phosphorylate several sites within the repeats (notably the KXGS motifs including Ser262, Ser324, and Ser356, plus Ser320); in addition PKA phosphorylates some sites in the flanking domains, notably Ser214. This type of phosphorylation strongly reduces tau's affinity for microtubules, and at the same time inhibits tau's assembly into PHFs. Thus, contrary to expectations, the phosphorylation that detaches tau from microtubules does not prime it for PHF assembly, but rather inhibits it. Likewise, although the phosphorylation sites on Ser-Pro or Thr-Pro motifs are the most prominent ones on Alzheimer PHFs (by antibody labeling), they are only weakly inhibitory to PHF assembly. This implies that the hyperphosphorylation of tau in Alzheimer's disease is not directly responsible for the pathological aggregation into PHFs; on the contrary, phosphorylation protects tau against aggregation.
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Affiliation(s)
- A Schneider
- Max-Planck-Unit for Structural Molecular Biology, Notkestrasse 85, D-22603 Hamburg, Germany
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30
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Friedhoff P, von Bergen M, Mandelkow EM, Davies P, Mandelkow E. A nucleated assembly mechanism of Alzheimer paired helical filaments. Proc Natl Acad Sci U S A 1998; 95:15712-7. [PMID: 9861035 PMCID: PMC28109 DOI: 10.1073/pnas.95.26.15712] [Citation(s) in RCA: 254] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/1998] [Indexed: 11/18/2022] Open
Abstract
Alzheimer's disease is characterized by two types of fibrous aggregates in the affected brains, the amyloid fibers (consisting of the Abeta-peptide, generating the amyloid plaques), and paired helical filaments (PHFs; made up of tau protein, forming the neurofibrillary tangles). Hence, tau protein, a highly soluble protein that normally stabilizes microtubules, becomes aggregated into insoluble fibers that obstruct the cytoplasm of neurons and cause a loss of microtubule stability. We have developed recently a rapid assay for monitoring PHF assembly and show here that PHFs arise from a nucleated assembly mechanism. The PHF nucleus comprises about 8-14 tau monomers. A prerequisite for nucleation is the dimerization of tau because tau dimers act as effective building blocks. PHF assembly can be seeded by preformed filaments (made either in vitro or isolated from Alzheimer brain tissue). These results suggest that dimerization and nucleation are the rate-limiting steps for PHF formation in vivo.
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Affiliation(s)
- P Friedhoff
- Max-Planck-Unit for Structural Molecular Biology, Notkestrasse 85, D-22607 Hamburg, Germany
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31
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Hamber G, von Bergen M. Peptic ulcer in the Burundi Republic and Nile-Congo watershed. Trop Geogr Med 1971; 23:213-9. [PMID: 5098990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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