TY - GEN A1 - George, Sandra A1 - Noack, M. A1 - Vanek, Monika A1 - Rentzsch, J. A1 - Röber, Nadja A1 - Roggenbuck, Dirk A1 - Conrad, Karsten A1 - Küpper, Jan-Heiner T1 - Expression of nicotinic acetylcholine receptor subunits in HEp-2 cells for immunodetection of autoantibody specificities in sera fro Myasthenia gravis patients T2 - Clinical Hemorheology and Microcirculation Y1 - 2015 U6 - https://doi.org/10.3233/CH-151999 SN - 1875-8622 SN - 1386-0291 VL - 61 IS - 2 SP - 385 EP - 396 ER - TY - GEN A1 - George, Sandra A1 - Paulick, Silvia A1 - Knütter, Ilka A1 - Röber, Nadja A1 - Hiemann, Rico A1 - Roggenbuck, Dirk A1 - Conrad, Karsten A1 - Küpper, Jan-Heiner T1 - Stable Expression of Human Muscle-Specific Kinase in HEp-2 M4 Cells for Automatic Immunofluorescence Diagnostics of Myasthenia Gravis T2 - PLOS one Y1 - 2014 U6 - https://doi.org/10.1371/journal.pone.0083924 SN - 1932-6203 VL - 9 IS - 1 SP - e83924 ER - TY - GEN A1 - George, Sandra A1 - Georgi, M. A1 - Roggenbuck, Dirk A1 - Conrad, Karsten A1 - Küpper, Jan-Heiner T1 - A strategy for cell-based multiplex diagnostics of Myasthenia gravis and autoimmune encephalitis by modifying the subcellular localization of cell membrane autoantigensgravis T2 - Clinical Hemorheology and Microcirculation Y1 - 2014 U6 - https://doi.org/10.3233/CH-141897 SN - 1386-0291 SN - 1875-8622 VL - 58 IS - 1 SP - 211 EP - 228 ER - TY - CHAP A1 - Conrad, Karsten A1 - Küpper, Jan-Heiner ED - Shoenfeld, Yehuda ED - Meroni, Pier Luigi ED - Gershwin, M. Eric T1 - Tumor-associated autoantibodies T2 - Autoantibodies Y1 - 2014 SN - 978-0-444-56378-1 SN - 978-0-444-59377-1 SP - 275 EP - 287 PB - Elsevier CY - Amsterdam [u.a.] ET - 3rd edition ER - TY - GEN A1 - Sowa, Mandy A1 - Großmann, Kai A1 - Knütter, Ilka A1 - Hiemann, Rico A1 - Röber, Nadja A1 - Anderer, Ursula A1 - Csernok, Elena A1 - Bogdanos, Dimitrios Petrou A1 - Borghi, Maria Orietta A1 - Meroni, Pier Luigi A1 - Schierack, Peter A1 - Reinhold, Dirk A1 - Conrad, Karsten A1 - Roggenbuck, Dirk T1 - Simultaneous automated screening and confirmatory testing for vasculitis-specific ANCA T2 - PLoS ONE KW - ANCA KW - vasculitis KW - screening KW - confirmatory testing KW - multiplexing KW - CytoBead technology Y1 - 2014 U6 - https://doi.org/10.1371/journal.pone.0107743 SN - 1932-6203 VL - 9 IS - 9 ER - TY - GEN A1 - Knütter, Ilka A1 - Hiemann, Rico A1 - Brumma, Therese A1 - Büttner, Thomas A1 - Großmann, Kai A1 - Cusini, Marco A1 - Pregnolato, Francesca A1 - Borghi, Maria Orietta A1 - Anderer, Ursula A1 - Conrad, Karsten A1 - Reinhold, Dirk A1 - Roggenbuck, Dirk A1 - Csernok, Elena T1 - Automated interpretation of ANCA patterns - a new approach in the serology of ANCA-associated vasculitis T2 - Arthritis Research & Therapy KW - ANCA-associated vasculitis KW - serology KW - pattern recognition algorithms KW - discrimination and classification of cytoplasmic ANCA (C-ANCA) and perinuclear ANCA (P-ANCA) KW - automated interpretation of ANCA IIF Y1 - 2012 UR - http://arthritis-research.com/content/14/6/R271 U6 - https://doi.org/10.1186/ar4119 SN - 1465-9913 SN - 1478-6354 VL - 14 ER - TY - GEN A1 - Willitzki, Annika A1 - Hiemann, Rico A1 - Peters, Vanessa A1 - Sack, Ulrich A1 - Schierack, Peter A1 - Rödiger, Stefan A1 - Anderer, Ursula A1 - Conrad, Karsten A1 - Bogdanos, Dimitrios Petrou A1 - Reinhold, Dirk A1 - Roggenbuck, Dirk T1 - New PlatformTechnology for Comprehensive Serological Diagnostics of Autoimmune Diseases T2 - Clinical and Developmental Immunology KW - systemic autoimmune rheumatic disease (SARD) KW - automated IIF methods KW - platform for automated interpretation of cell-based IIF testing KW - microbead immunoassays KW - multiplexing Y1 - 2012 U6 - https://doi.org/10.1155/2012/284740 SN - 1740-2530 SN - 1740-2522 SP - 1 EP - 8 ER - TY - GEN A1 - Nowak, Elisabeth A1 - Martin, F. A1 - George, Sandra A1 - Röber, Nadja A1 - Conrad, Karsten A1 - Küpper, Jan-Heiner T1 - Bacterial production and purification of immunoreactive paraneoplastic neurological syndrome autoantigen Ma2 T2 - Journal of Cellular Biotechnology N2 - Paraneoplastic neurological syndromes (PNS) are caused by an immune response against neuronal proteins upon their ectopical expression in tumor cells. Ma2 belongs to the protein family of paraneoplastic Ma antigens (PNMA). Detection of Ma2-specific autoantibodies is relevant for diagnostics of anti-Ma2 PNS and an underlying tumor such as germ testicular cancer, small cell lung cancer or breast cancer. Thus, early tumor treatment should improve the outcome for PNS therapy either. Dot blot immunoassay based on recombinantly expressed and purified autoantigens could offer a sensitive method for identification of paraneoplastic autoantibodies from sera of PNS patients. Here we present purification with IMAC and FPLC of human Ma2 autoantigen upon its recombinant expression in E.coli. Furthermore, we provide evidence that dot blot immunoassays with purified Ma2 autoantigen can be used for detection of Ma2-specific autoantibodies from sera of PNS patients. KW - Autoimmune disease KW - autoantibodies KW - dot blot immunoassay KW - FPLC KW - IMAC KW - Ma2 KW - PNMA2 KW - PNS KW - T7 expression system Y1 - 2017 UR - https://content.iospress.com/articles/journal-of-cellular-biotechnology/jcb15029 U6 - https://doi.org/10.3233/JCB-15029 SN - 2352-3697 VL - 2 IS - 2 SP - 85 EP - 91 ER - TY - CHAP A1 - George, Sandra A1 - Noack, Monika A1 - Vanek, Monika A1 - Rentzsch, Juliane A1 - Röber, Nadja A1 - Conrad, Karsten A1 - Roggenbuck, Dirk A1 - Küpper, Jan-Heiner T1 - Expression of nicotinic acetylcholine receptor subunits in HEp-2 cells for immunodetection of autoantibody specificities in sera from Myasthenia gravis patients T2 - From autoantibody research to standardized diagnostic assays in the management of human diseases, report on the 12th Dresden Symposium on Autoantibodies, September 23-26, 2015 Y1 - 2015 SN - 978-3-95853-104-8 SP - 195 EP - 196 PB - Pabst Science Publishers CY - Lengerich ER - TY - GEN A1 - Roggenbuck, Dirk A1 - Reinhold, Dirk A1 - Werner, Leal A1 - Schierack, Peter A1 - Bogdanos, Dimitrios Petrou A1 - Conrad, Karsten T1 - Glycoprotein 2 antibodies in Crohn's disease. T2 - Advances in Clinical Chemistry Y1 - 2013 SN - 0065-2423 VL - 60 SP - 187 EP - 208 ER - TY - GEN A1 - Roggenbuck, Dirk A1 - Hiemann, Rico A1 - Schierack, Peter A1 - Reinhold, Dirk A1 - Conrad, Karsten T1 - Digital immunofluorescence enables automated detection of antinuclear antibody endpoint titers avoiding serial dilution T2 - Clinical Chemistry and Laboratory Medicine Y1 - 2013 U6 - https://doi.org/10.1515/cclm-2013-0543 SN - 1437-4331 SN - 1434-6621 VL - 52 IS - 2 SP - e9 EP - e11 ER - TY - GEN A1 - Willitzki, Annika A1 - Lorenz, Sebastian A1 - Hiemann, Rico A1 - Guttek, Karina A1 - Goihl, Alexander A1 - Hartig, Roland A1 - Conrad, Karsten A1 - Feist, Eugen A1 - Sack, Ulrich A1 - Schierack, Peter A1 - Heiserich, Lisa A1 - Eberle, Caroline A1 - Peters, Vanessa A1 - Roggenbuck, Dirk A1 - Reinhold, Dirk T1 - Fully automated analysis of chemically induced γH2AX foci in human peripheral blood mononuclear cells by indirect immunofluorescence T2 - Cytometry Part A Y1 - 2013 U6 - https://doi.org/10.1002/cyto.a.22350 SN - 1552-4930 SN - 1552-4922 VL - 83 IS - 11 SP - 1017 EP - 1026 ER - TY - GEN A1 - Großmann, Kai A1 - Roggenbuck, Dirk A1 - Schröder, Christian A1 - Conrad, Karsten A1 - Schierack, Peter A1 - Sack, Ulrich T1 - Multiplex assessment of non-organ-specific autoantibodies with a novel microbead-based immunoassay T2 - Cytometry Part A Y1 - 2011 U6 - https://doi.org/10.1002/cyto.a.21009 SN - 1552-4922 SN - 1552-4930 VL - 79 IS - 2 SP - 118 EP - 125 ER - TY - GEN A1 - Sowa, Mandy A1 - Kolenda, Rafał A1 - Baumgart, Daniel C. A1 - Pratschke, Johann A1 - Papp, Maria A1 - Tornai, Tamas A1 - Suchanski, Jaroslaw A1 - Bogdanos, Dimitrios Petrou A1 - Mytilinaiou, Maria G. A1 - Hammermann, Jutta A1 - Laass, Martin W. A1 - Conrad, Karsten A1 - Schramm, Christoph A1 - Franke, Andre A1 - Roggenbuck, Dirk A1 - Schierack, Peter T1 - Mucosal Autoimmunity to Cell-Bound GP2 Isoforms Is a Sensitive Marker in PSC and Associated With the Clinical Phenotype T2 - Frontiers in Immunology Y1 - 2018 U6 - https://doi.org/10.3389/fimmu.2018.01959 SN - 1664-3224 VL - 9 IS - 1959 ER - TY - GEN A1 - Roggenbuck, Dirk A1 - Reinhold, Dirk A1 - Schierack, Peter A1 - Bogdanos, Dimitrios Petrou A1 - Conrad, Karsten A1 - Laass, Martin W. T1 - Crohn's disease specific pancreatic antibodies: clinical and pathophysiological challenges T2 - Clinical Chemistry and Laboratory Medicine Y1 - 2013 U6 - https://doi.org/10.1515/cclm-2013-0801 SN - 1437-4331 SN - 1434-6621 VL - 52 IS - 4 SP - 494 ER - TY - GEN A1 - Sowa, Mandy A1 - Großmann, Kai A1 - Scholz, Juliane A1 - Röber, Nadja A1 - Rödiger, Stefan A1 - Schierack, Peter A1 - Conrad, Karsten A1 - Roggenbuck, Dirk A1 - Hiemann, Rico T1 - Der CytoBead-Assay – Eine neue Möglichkeit der multiparametrischen Autoantikörperanalytik bei systemischen Autoimmunerkrankungen T2 - Journal of Laboratory Medicine Y1 - 2014 U6 - https://doi.org/10.1515/labmed-2014-0041 VL - 38 IS - 6 SP - 309 EP - 317 ER - TY - GEN A1 - Scholz, Juliane A1 - Großmann, Kai A1 - Knütter, Ilka A1 - Hiemann, Rico A1 - Sowa, Mandy A1 - Röber, Nadja A1 - Rödiger, Stefan A1 - Schierack, Peter A1 - Reinhold, Dirk A1 - Bogdanos, Dimitrios Petrou A1 - Meroni, Pier Luigi A1 - Radice, Antonella A1 - Conrad, Karsten A1 - Roggenbuck, Dirk T1 - Second generation analysis of antinuclear antibody (ANA) by combination of screening and confirmatory testing T2 - Clinical Chemistry and Laboratory Medicine Y1 - 2015 U6 - https://doi.org/10.1515/cclm-2015-0083 SN - 1437-4331 VL - 53 IS - 12 SP - 1991 EP - 2002 ER - TY - GEN A1 - Großmann, Kai A1 - Röber, Nadja A1 - Hiemann, Rico A1 - Rödiger, Stefan A1 - Schierack, Peter A1 - Reinhold, Dirk A1 - Laass, Martin W. A1 - Conrad, Karsten A1 - Roggenbuck, Dirk T1 - Simultaneous detection of celiac disease-specific IgA antibodies and total IgA T2 - Autoimmunity Highlights Y1 - 2016 U6 - https://doi.org/10.1007/s13317-016-0073-2 SN - 2038-0305 SN - 2038-3274 VL - 7 IS - 2 ER - TY - GEN A1 - Roggenbuck, Dirk A1 - Reinhold, Dirk A1 - Baumgart, Daniel C. A1 - Schierack, Peter A1 - Conrad, Karsten A1 - Laass, Martin W. T1 - Autoimmunity in Crohn's Disease-A Putative Stratification Factor of the Clinical Phenotype T2 - Advances in Clinical Chemistry Y1 - 2016 U6 - https://doi.org/10.1016/bs.acc.2016.06.002 SN - 0065-2423 VL - 77 SP - 77 EP - 101 ER - TY - GEN A1 - Sowa, Mandy A1 - Hiemann, Rico A1 - Schierack, Peter A1 - Reinhold, Dirk A1 - Conrad, Karsten A1 - Roggenbuck, Dirk T1 - Next-Generation Autoantibody Testing by Combination of Screening and Confirmation-the CytoBead® Technology T2 - Clinical Reviews in Allergy & Immunology Y1 - 2017 U6 - https://doi.org/10.1007/s12016-016-8574-3 SN - 1559-0267 SN - 1080-0549 VL - 53 IS - 1 SP - 87 EP - 104 ER - TY - GEN A1 - Deutschmann, Claudia A1 - Sowa, Mandy A1 - Murugaiyan, Jayaseelan A1 - Roessler, Uwe A1 - Röber, Nadja A1 - Conrad, Karsten A1 - Laass, Martin W. A1 - Bogdanos, Dimitrios Petrou A1 - Sipeki, Nora A1 - Papp, Maria A1 - Rödiger, Stefan A1 - Roggenbuck, Dirk A1 - Schierack, Peter T1 - Identification of Chitinase-3-Like Protein 1 as a Novel Neutrophil Antigenic Target in Crohn’s Disease T2 - Journal of Crohn's and Colitis N2 - Background and Aims There is an increasing incidence of inflammatory bowel disease [IBD]. Autoimmune responses are involved in the pathophysiology of IBD, but their underlying pathways and target antigens have not yet been fully elucidated. Methods Autoantigenic targets in IBD were identified after separation of whole cell proteins isolated from neutrophils using two-dimensional electrophoresis and matrix assisted laser desorption ionization – time of flight mass spectrometry-based protein identification of the spots that displayed Western blotting signals with anti-neutrophil cytoplasmic antibody-positive sera. The prevalence of IgG, IgA and secretory IgA [sIgA] to chitinase 3-like protein 1 [CHI3L1] was analysed by enzyme-linked immunosorbent assays using recombinant CHI3L1 in 110 patients with Crohn’s disease [CD], 95 with ulcerative colitis [UC], 126 with coeliac disease [CeD] and 86 healthy controls [HCs]. Results The 18-glycosylhydrolase family member CHI3L1 was identified as a neutrophil autoantigenic target. CD patients displayed significantly higher levels of IgG to CHI3L1 than patients with UC and CeD (p < 0.0001, respectively). IgA and sIgA to CHI3L1 was significantly higher in CD than in UC, CeD and HCs [p < 0.0001, respectively]. IgA and sIgA to CHI3L1 demonstrated the highest prevalence in CD [25.5%, 28/110; and 41.8%%, 46/110] compared to HCs [2.3%, 2/86; and 4.7%%, 4/86; p = 0.0015 and p < 0.0001] and are associated with a more complicated progression of CD. Conclusion CHI3L1 is a novel neutrophil autoantigenic target in CD. IgA and sIgA to CHI3L1 may serve as novel markers for CD and may facilitate the serological diagnosis of IBD. Y1 - 2019 U6 - https://doi.org/10.1093/ecco-jcc/jjz012 SN - 1876-4479 SN - 1873-9946 VL - 13 IS - 7 SP - 894 EP - 904 ER - TY - GEN A1 - Sowa, Mandy A1 - Murugaiyan, Jayaseelan A1 - Conrad, Karsten A1 - Laass, Martin W. A1 - Bogdanos, Dimitrios Petrou A1 - Papp, Maria A1 - Rödiger, Stefan A1 - Roggenbuck, Dirk A1 - Schierack, Peter T1 - A novel neutrophil autoantigenic target in inflammatory bowel disease Y1 - 2018 UR - https://www.researchgate.net/publication/335889899_A_novel_neutrophil_autoantigenic_target_in_inflammatory_bowel_disease ER - TY - GEN A1 - Lopens, Steffi A1 - Krawczyk, Marcin A1 - Papp, Maria A1 - Milkiewicz, Piotr A1 - Schierack, Peter A1 - Liu, Yudong A1 - Wunsch, Ewa A1 - Conrad, Karsten A1 - Roggenbuck, Dirk T1 - The search for the Holy Grail: autoantigenic targets in primary sclerosing cholangitis asscociated with diesease phenotype an neoplasia T2 - Autoimmunity Highlights Y1 - 2020 U6 - https://doi.org/10.1186/s13317-020-00129-x SN - 2038-3274 SN - 2038-0305 VL - 11 ER - TY - GEN A1 - Roggenbuck, Dirk A1 - Elmont, Emilien A1 - Reinhold, Dirk A1 - Schierack, Peter A1 - Conrad, Karsten A1 - Boucraut, Joseph T1 - Autoimmune Perpheral Neuropathies and Contribution of Antiganglioside/Sulphatide Autoantibody Testing T2 - Mediterranean Jounal of Rheumatology Y1 - 2020 U6 - https://doi.org/10.31138/mjr.31.1.10 SN - 2529-198X VL - 31 IS - 1 SP - 10 EP - 18 ER - TY - GEN A1 - Roggenbuck, Johannes J. A1 - Zarske, Grit A1 - Schierack, Peter A1 - Wunderlich, Gerd A1 - Conrad, Karsten A1 - Kotzerke, Joerg A1 - Roggenbuck, Dirk A1 - Zöphel, Klaus T1 - Third generation radioimmunoassay (RIA) for TSH receptor autoantibodies (TRAb) - one step less, similar results? T2 - Nuklearmedizin Y1 - 2021 U6 - https://doi.org/10.1055/a-1277-5972 SN - 0029-5566 VL - 60 IS - 1 SP - 38 EP - 46 ER - TY - GEN A1 - Lopens, Steffi A1 - Wunsch, Ewa A1 - Milkiewicz, Malgorzata A1 - Röber, Nadja A1 - Zarske, Grit A1 - Nasser, Abdullah A1 - Conrad, Karsten A1 - Laass, Martin W. A1 - Rödiger, Stefan A1 - Krawczyk, Marcin A1 - Roggenbuck, Dirk A1 - Milkiewicz, Piotr T1 - PR3-ANCAs Detected by Third-Generation ELISA Predicts Severe Disease and Poor Survival in Primary Sclerosing Cholangitis T2 - Diagnostics N2 - A highly sensitive detection of anti-neutrophil cytoplasmic antibodies to serine proteinase-3 (PR3-ANCAs) aids in the serological diagnosis of autoimmune liver disorders and the prediction of severity in primary sclerosing cholangitis (PSC). Here, we evaluate a novel third-generation ELISA for the detection of PR3-ANCAs. In total, 309 patients with PSC, 51 with primary biliary cholangitis (PBC), and 120 healthy blood donors (BD) were analyzed. For the survival analysis in PSC, the outcome was defined as liver-transplantation-free survival during the follow-up. Positive PR3-ANCA levels were found in 74/309 (24.0%) of patients with PSC. No BDs and one patient with PBC demonstrated PR3-ANCA positivity. PR3-ANCAs were revealed as independent predictors for a poor PSC outcome (study endpoint: liver transplantation/death, log-rank test, p = 0.02). PR3-ANCA positivity, lower albumin levels, and higher bilirubin concentrations were independent risks of a poor survival (Cox proportional-hazards regression analysis, p < 0.05). The Mayo risk score for PSC was associated with PR3-ANCA positivity (p = 0.01) and the disease severity assessed with a model of end-stage liver disease (MELD) and extended MELD-Na (p < 0.05). PR3-ANCAs detected by a third-generation ELISA are diagnostic and prognostic markers for PSC. Their wider use could help to identify patients who are at-risk of a more severe disease. KW - primary sclerosing cholangitis KW - antibodies against serine protease proteinase-3 KW - survival KW - health-related quality of life KW - liver biochemistry KW - disease severity Y1 - 2022 U6 - https://doi.org/10.3390/diagnostics12112682 SN - 2075-4418 VL - 12 IS - 11 ER - TY - GEN A1 - Hiemann, Rico A1 - Roggenbuck, Dirk A1 - Sack, Ulrich A1 - Anderer, Ursula A1 - Conrad, Karsten T1 - Die HEp-2-Zelle als Target für multiparametrische Autoantikörperanalytik – Automatisierung und Standardisierung/The HEp-2 cell as target for multiparametric autoantibody analyses: automation and standardisation T2 - Journal of Laboratory Medicine N2 - Trotz Einführung von Multiplex-Assays ist die Bestimmung von Autoantikörpern (AAK) mittels indirekter Immunfluoreszenz (IIF) nach wie vor ein wesentlicher Bestandteil der Autoimmundiagnostik. Das Screening auf nichtorganspezifische AAK wird in der Routinediagnostik von autoimmunen rheumatischen Erkrankungen mittels indirekter Immunfluoreszenz an HEp-2-Zellen durchgeführt. Leider differieren die mit diesem Test erhaltenen Befunde z. T. recht erheblich auf Grund von objektiven (z. B. HEp-2-Zellfixierung) und subjektiven (z. B. Erfahrungswerte) Faktoren. Die Intra- und Interlaborvarianzen sind daher relativ hoch. Erste Ergebnisse von Evaluierungsstudien eines neu entwickelten Systems zur automatischen Bildanalyse (AKLIDES®) zeigen einen Weg in Richtung Standardisierung (bzw. Harmonisierung) des HEp-2-Zell-Assays auf, in dem zunächst subjektive Fehlinterpretationen vermieden werden können. Eine weitere Harmonisierung erfordert die Weiterentwicklung der Software-Algorithmen zur Mustererkennung sowie neue Kalibrationssysteme. KW - Autoantikörper KW - Automatisierung KW - HEp-2 KW - Immunfluoreszenz Y1 - 2011 U6 - https://doi.org/10.1515/JLM.2011.053 SN - 1439-0477 VL - 35 IS - 6 SP - 351 EP - 361 ER -