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Ohl K, Subramanyam SH, Verjans E, Clarner T, Böll S, Costa Filho IG, Li Z, Gan L, Schmitt E, Bopp T, Wagner N, Schulz S, Goodarzi T, Scheld M, Floess S, Huehn J, Lambrecht B, Beyaert R, Look T, Zenke M, Tenbrock K. Foxp3-specific deletion of CREB generates ST-2 positive regulatory
T-cells with shifts towards type 2 immune responses. Klinische Pädiatrie 2022. [DOI: 10.1055/s-0042-1754516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- K Ohl
- RWTH Aachen, Pediatrics, Aachen, Germany
| | | | - E Verjans
- RWTH Aachen, Pediatrics, Aachen, Germany
| | - T Clarner
- RWTH Aachen, Anatomy, Aachen, Germany
| | - S Böll
- RWTH Aachen, Pediatrics, Aachen, Germany
| | | | - Z Li
- RWTH Aachen, Computational Genomics, Aachen, Germany
| | - L Gan
- RWTH Aachen, Computational Genomics, Aachen, Germany
| | - E Schmitt
- Institut für Immunologie, Universität Mainz, Mainz,
Germany
| | - T Bopp
- Institut für Immunologie, Universität Mainz, Mainz,
Germany
| | - N Wagner
- RWTH Aachen, Pediatrics, Aachen, Germany
| | - S Schulz
- RWTH Aachen, Pediatrics, Aachen, Germany
| | - T Goodarzi
- RWTH Aachen, Pediatrics, Aachen, Germany
| | - M Scheld
- RWTH Aachen, Anatomy, Aachen, Germany
| | | | | | | | | | - T Look
- RWTH Aachen, Zellbiologie, Aachen, Germany
| | - M Zenke
- RWTH Aachen, Zellbiologie, Aachen, Germany
| | - K Tenbrock
- RWTH Aachen, Pediatrics, Aachen, Germany
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Jacob M, Ohl K, Goodarzi T, Harendza S, Eggermann T, Fitzner C, Hilgers RD, Bolte A, Floege J, Rauen T, Tenbrock K. CTLA-4 Polymorphisms in Patients with IgA Nephropathy Correlate with Proteinuria. Kidney Blood Press Res 2018. [PMID: 29539619 DOI: 10.1159/000488069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 11/19/2022] Open
Abstract
BACKGROUND/AIMS IgA nephropathy (IgAN) is the most common form of primary glomerulonephritis and still constitutes one of the most important causes of end-stage renal disease. Abnormal T cell responses may play a role in IgAN pathogenesis. Co-stimulatory molecules such as cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) are important for naive T cells to initiate and terminate immune responses. Single nucleotide polymorphisms (SNPs) in the CTLA4 gene locus are associated with several autoimmune diseases. METHODS We aimed to investigate the occurrence of the SNPs -318C/T, +49A/G and CT60 G/A within the CTLA4 locus in healthy blood donors (n=455) and IgAN patients (n=252) recruited from the recently published STOP-IgAN trial. The presence of these SNPs was then associated with baseline proteinuria in IgAN patients. RESULTS We observed a significantly increased frequency of the CTLA4 -318C/T genotype in IgAN patients as compared to controls (CC vs. CT+TT: OR 1.65, 95%-CI 1.03-2.65, p=0.035). No significant associations, neither with the +49A/G nor for the CT60 G/A SNP, were detected. However, when we stratified for proteinuria at time of inclusion into the STOP-IgAN trial (<1 g/day vs. >1 g/day), we observed significant differences in the frequencies of the CT60 G/A genotype, i.e. a significantly increased risk for higher proteinuria in patients carrying the G allele (OR 2.81, 95%-CI 1.03-7.64, p=0.042). CONCLUSION The CTLA4 -318/C/T SNP was associated with an increased risk to develop IgAN, while the CT60 G/A genotype significantly associated with the risk for higher proteinuria suggesting a possible role for CTLA-4 in IgAN.
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Affiliation(s)
- Marius Jacob
- RWTH Aachen University, Dept. of Pediatrics, Aachen, Germany
| | - Kim Ohl
- RWTH Aachen University, Dept. of Pediatrics, Aachen, Germany
| | - Tannaz Goodarzi
- RWTH Aachen University, Dept. of Pediatrics, Aachen, Germany
| | - Sigrid Harendza
- Universitätsklinikum Hamburg-Eppendorf, Zentrum für Innere Medizin, III. Medizinische Klinik, Hamburg, Germany
| | | | - Christina Fitzner
- RWTH Aachen University, Department of Medical Statistics, Aachen, Germany
| | | | - Anna Bolte
- RWTH Aachen University, Division of Nephrology and Clinical Immunology, Aachen, Germany
| | - Jürgen Floege
- RWTH Aachen University, Division of Nephrology and Clinical Immunology, Aachen, Germany
| | - Thomas Rauen
- RWTH Aachen University, Division of Nephrology and Clinical Immunology, Aachen, Germany
| | - Klaus Tenbrock
- RWTH Aachen University, Dept. of Pediatrics, Aachen, Germany
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Gholami D, Goodarzi T, Aminzadeh S, Alavi SM, Kazemipour N, Farrokhi N. Bacterial Secretome Analysis in Hunt for Novel Bacteriocins with Ability to Control Xanthomonas citri subsp. Citri. Iran J Biotechnol 2015; 13:10-19. [PMID: 28959294 PMCID: PMC5435018 DOI: 10.15171/ijb.1123] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 06/27/2015] [Accepted: 08/27/2015] [Indexed: 11/09/2022]
Abstract
BACKGROUND Xanthomonas citri subsp. citri (Xcc), the causative agent of bacterial citrus canker, has affected citriculture worldwide. Varieties of means have been used to minimize its devastating effects, but no attention has been given to bacteriocins. OBJECTIVES Here and for the first time, we report the isolation and characterization of two novel bacteriocins. MATERIALS AND METHODS Secretome containing bacteriocins of isolated bacteria was separated via SDS-PAGE. Each isolated protein band was characterized and checked for its efficacy in controlling two pathogenic isolates of Xcc via disk diffusion assay. The effects of varieties of carbon, nitrogen and phosphate sources were evaluated on both bacterial growth and bacteriocin production via Taguchi orthogonal method. RESULTS The two bacteriocins showed an activity up to 55ºC that were sensitive to proteases suggesting being protein in nature. Analysis of SDS-PAGE purified protein bands of bacterial secretomes with demonstrated potency against Xcc revealed the presence of peptides with relative molecular masses of 16.9 and 17 kDa for Cronobacter and Enterobacter, respectively. Sequence analysis of peptides revealed an HCP1 family VI secretion system homologue for Cronobacter (YP_001439956) and pilin FimA homologue for Enterobacter (CBK85798.1). A Taguchi orthogonal array was also implemented to determine the effect of temperature and eight other chemical factors on bacteriocin production for each bacterium. CONCLUSIONS Two peptides with novel antibacterial activities effective against Xcc were isolated, characterized and conditions were optimized for their higher production.
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Affiliation(s)
- Dariush Gholami
- Department of Bioprocess Engineering, National Institute for Genetic Engineering and Biotechnology, Tehran, Iran
- Science Department, Sistan-Baluchistan University, Zahedan, Iran
| | - Tannaz Goodarzi
- Department of Bioprocess Engineering, National Institute for Genetic Engineering and Biotechnology, Tehran, Iran
| | - Saeed Aminzadeh
- Department of Bioprocess Engineering, National Institute for Genetic Engineering and Biotechnology, Tehran, Iran
| | - Seyed Mehdi Alavi
- Department of Bioprocess Engineering, National Institute for Genetic Engineering and Biotechnology, Tehran, Iran
| | | | - Naser Farrokhi
- Department of Biotechnology, Faculty of New Technologies and Energy Engineering, Shahid Beheshti University, Tehran, Iran
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Abstract
Neuromyelitis optica (NMO) is an inflammatory demyelinating disorder of the central nervous system that has been thought to be a severe subtype of multiple sclerosis for a long time. The discovery of aquaporin-4 (AQP4) antibody as a highly specific marker responsible for the pathogenesis of NMO, not only has made a revolutionary pace in establishing a serologic distinction between the two diseases, but it has also classified NMO as an antibody-mediated disorder. Similarly, myasthenia gravis (MG) is a well-known antibody-mediated disorder. In this report, we describe the case of a middle-aged female patient who experienced definite MG with an unclear clinical picture of chronic demyelinating disease that initially reflected the diagnosis of MS, but further imaging and paraclinical workup (e.g. positive AQP4 antibody test) revealed NMO. The coexistence of NMO and MG is previously described. However, this is the first case with NMO symptoms preceding the onset of MG. Of note, the development of MG occurred after a 2-year period of interferon β-1b (IFN β-1b) administration. This calls the question to mind of whether in our case MG is induced by the administration of interferon, instead of an original pathogenic link between MG and NMO. In other words, immunomodulatory treatments can slip the immunity towards T-helper II predominant pathways that can trigger MG. However, if we assume that such an explanation (i.e. increased susceptibility to autoantibody-mediated disorders) is true, our case can be considered the first case of NMO who developed MG following IFN β-1b treatment.
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