@misc{GeorgePaulickKnuetteretal., author = {George, Sandra and Paulick, Silvia and Kn{\"u}tter, Ilka and R{\"o}ber, Nadja and Hiemann, Rico and Roggenbuck, Dirk and Conrad, Karsten and K{\"u}pper, Jan-Heiner}, title = {Stable Expression of Human Muscle-Specific Kinase in HEp-2 M4 Cells for Automatic Immunofluorescence Diagnostics of Myasthenia Gravis}, series = {PLOS one}, volume = {9}, journal = {PLOS one}, number = {1}, issn = {1932-6203}, doi = {10.1371/journal.pone.0083924}, pages = {e83924}, language = {en} } @misc{KnuetterHiemannBrummaetal., author = {Kn{\"u}tter, Ilka and Hiemann, Rico and Brumma, Therese and B{\"u}ttner, Thomas and Großmann, Kai and Cusini, Marco and Pregnolato, Francesca and Borghi, Maria Orietta and Anderer, Ursula and Conrad, Karsten and Reinhold, Dirk and Roggenbuck, Dirk and Csernok, Elena}, title = {Automated interpretation of ANCA patterns - a new approach in the serology of ANCA-associated vasculitis}, series = {Arthritis Research \& Therapy}, volume = {14}, journal = {Arthritis Research \& Therapy}, issn = {1465-9913}, doi = {10.1186/ar4119}, pages = {10}, language = {en} } @misc{HiemannRoggenbuckSacketal., author = {Hiemann, Rico and Roggenbuck, Dirk and Sack, Ulrich and Anderer, Ursula and Conrad, Karsten}, title = {Die HEp-2-Zelle als Target f{\"u}r multiparametrische Autoantik{\"o}rperanalytik - Automatisierung und Standardisierung/The HEp-2 cell as target for multiparametric autoantibody analyses: automation and standardisation}, series = {Journal of Laboratory Medicine}, volume = {35}, journal = {Journal of Laboratory Medicine}, number = {6}, issn = {1439-0477}, doi = {10.1515/JLM.2011.053}, pages = {351 -- 361}, abstract = {Trotz Einf{\"u}hrung von Multiplex-Assays ist die Bestimmung von Autoantik{\"o}rpern (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 durchgef{\"u}hrt. 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 zun{\"a}chst subjektive Fehlinterpretationen vermieden werden k{\"o}nnen. Eine weitere Harmonisierung erfordert die Weiterentwicklung der Software-Algorithmen zur Mustererkennung sowie neue Kalibrationssysteme.}, language = {en} } @misc{HiemannHilgerMicheletal., author = {Hiemann, Rico and Hilger, Nadja and Michel, J{\"o}rg and Nitschke, J{\"o}rg and B{\"o}hm, Alexander and Anderer, Ursula and Weigert, Martin and Sack, Ulrich}, title = {Automatic Analysis of Immunofluorescence Patterns of HEp-2 Cells}, series = {Annals of the New York Academy of Sciences}, volume = {1109}, journal = {Annals of the New York Academy of Sciences}, number = {1}, issn = {0077-8923}, doi = {10.1196/annals.1398.042}, pages = {358 -- 371}, abstract = {The standard screening test for the recognition of autoimmune diseases is the proof of autoantibodies in serum of patients by indirect immunofluorescence (IIF) based on HEp-2 cells. Manual evaluation of this test is very subjective, slow, and there are no objective parameters as guidelines available. Interlaboratory tests showed occasionally large deviations in the test evaluation resulting in a high variance of results. The aim of this project is fast, objective, safe, and economical automatic analysis of HEp-2 IIF patterns. Images of IIF patterns were completely and automatically captured using an inverse motorized fluorescence microscope. Thereby, device-specific parameters were controlled automatically, too. For fast analysis of IIF patterns new algorithms of image processing were developed. Artifacts were recognized and excluded from analysis by the developed software. Analysis of more than 80,000 images clearly demonstrated full automatization and fast processing of IIF patterns. Additionally serum-specific fluorescence could be easily distinguished from background. Even very weak but positive patterns can be recognized and used for diagnosis. A detailed separation into different basic patterns is possible. Objective, fast, and disease-related economical analysis of HEp-2 immunofluorescence patterns is feasible. The implemented software algorithms allowed a mathematical way of describing IIF patterns and can therefore be a useful tool for the needed standardization process.}, language = {en} } @misc{SchierackRoedigerKuhletal., author = {Schierack, Peter and R{\"o}diger, Stefan and Kuhl, Christoph and Hiemann, Rico and Roggenbuck, Dirk and Li, Ganwu and Weinreich, J{\"o}rg and Berger, Enrico and Nolan, Lisa K. and Nicholson, Bryon and R{\"o}mer, Antje and Fr{\"o}mmel, Ulrike and Wieler, Lothar H. and Schr{\"o}der, Christian}, title = {Porcine E. coli: Virulence-Associated Genes, Resistance Genes and Adhesion and Probiotic Activity Tested by a New Screening Method}, series = {PLoS One}, volume = {8}, journal = {PLoS One}, number = {4}, doi = {10.1371/journal.pone.0059242}, pages = {13}, abstract = {We established an automated screening method to characterize adhesion of Escherichia coli to intestinal porcine epithelial cells (IPEC-J2) and their probiotic activity against infection by enteropathogenic E. coli (EPEC). 104 intestinal E. coli isolates from domestic pigs were tested by PCR for the occurrence of virulence-associated genes, genes coding for resistances to antimicrobial agents and metals, and for phylogenetic origin by PCR. Adhesion rates and probiotic activity were examined for correlation with the presence of these genes. Finally, data were compared with those from 93 E. coli isolates from wild boars. Isolates from domestic pigs carried a broad variety of all tested genes and showed great diversity in gene patterns. Adhesions varied with a maximum of 18.3 or 24.2 mean bacteria adherence per epithelial cell after 2 or 6 hours respectively. Most isolates from domestic pigs and wild boars showed low adherence, with no correlation between adhesion/probiotic activity and E. coli genes or gene clusters. The gene sfa/foc, encoding for a subunit of F1C fimbriae did show a positive correlative association with adherence and probiotic activity; however E. coli isolates from wild boars with the sfa/foc gene showed less adhesion and probiotic activity than E. coli with the sfa/foc gene isolated from domestic pigs after 6 hour incubation. In conclusion, screening porcine E. coli for virulence associated genes genes, adhesion to intestinal epithelial cells, and probiotic activity revealed a single important adhesion factor, several probiotic candidates, and showed important differences between E. coli of domestic pigs and wild boars.}, language = {en} } @misc{SchierackRoedigerKolendaetal., author = {Schierack, Peter and R{\"o}diger, Stefan and Kolenda, Rafał and Hiemann, Rico and Berger, Enrico and Grzymajlo, Krzysztof and Swidsinski, Alexander and Juretzek, Thomas and Meissner, Dirk and Mydlak, Karsten and Reinhold, Dirk and Nolan, Lisa K. and Roggenbuck, Dirk}, title = {Species-specific and pathotype-specific binding of bacteria to zymogen granule membrane glycoprotein 2 (GP2)}, series = {Gut}, volume = {64}, journal = {Gut}, number = {3}, issn = {1468-3288}, doi = {10.1136/gutjnl-2014-307854}, pages = {517 -- 519}, language = {en} } @misc{ScholzGrossmannKnuetteretal., author = {Scholz, Juliane and Großmann, Kai and Kn{\"u}tter, Ilka and Hiemann, Rico and Sowa, Mandy and R{\"o}ber, Nadja and R{\"o}diger, Stefan and Schierack, Peter and Reinhold, Dirk and Bogdanos, Dimitrios Petrou and Meroni, Pier Luigi and Radice, Antonella and Conrad, Karsten and Roggenbuck, Dirk}, title = {Second generation analysis of antinuclear antibody (ANA) by combination of screening and confirmatory testing}, series = {Clinical Chemistry and Laboratory Medicine}, volume = {53}, journal = {Clinical Chemistry and Laboratory Medicine}, number = {12}, issn = {1437-4331}, doi = {10.1515/cclm-2015-0083}, pages = {1991 -- 2002}, language = {en} } @misc{WillitzkiLorenzHiemannetal., author = {Willitzki, Annika and Lorenz, Sebastian and Hiemann, Rico and Guttek, Karina and Goihl, Alexander and Hartig, Roland and Conrad, Karsten and Feist, Eugen and Sack, Ulrich and Schierack, Peter and Heiserich, Lisa and Eberle, Caroline and Peters, Vanessa and Roggenbuck, Dirk and Reinhold, Dirk}, title = {Fully automated analysis of chemically induced γH2AX foci in human peripheral blood mononuclear cells by indirect immunofluorescence}, series = {Cytometry Part A}, volume = {83}, journal = {Cytometry Part A}, number = {11}, issn = {1552-4930}, doi = {10.1002/cyto.a.22350}, pages = {1017 -- 1026}, language = {en} } @misc{ReddigLorenzHiemannetal., author = {Reddig, Annika and Lorenz, Sebastian and Hiemann, Rico and Guttek, Karina and Hartig, Roland and Heiserich, Lisa and Peter, Vanessa and Schierack, Peter and Sack, Ulrich and Roggenbuck, Dirk and Reinhold, Dirk and Eberle, Caroline}, title = {Cytostatic drug resistance monitored by γH2AX}, series = {Cytometry Part A}, volume = {87}, journal = {Cytometry Part A}, number = {8}, issn = {1552-4930}, doi = {10.1002/cyto.a.22667}, pages = {724 -- 732}, language = {en} } @misc{SowaGrossmannKnuetteretal., author = {Sowa, Mandy and Großmann, Kai and Kn{\"u}tter, Ilka and Hiemann, Rico and R{\"o}ber, Nadja and Anderer, Ursula and Csernok, Elena and Bogdanos, Dimitrios Petrou and Borghi, Maria Orietta and Meroni, Pier Luigi and Schierack, Peter and Reinhold, Dirk and Conrad, Karsten and Roggenbuck, Dirk}, title = {Simultaneous automated screening and confirmatory testing for vasculitis-specific ANCA}, series = {PLoS ONE}, volume = {9}, journal = {PLoS ONE}, number = {9}, issn = {1932-6203}, doi = {10.1371/journal.pone.0107743}, pages = {11}, language = {en} } @misc{RoggenbuckHiemannSchieracketal., author = {Roggenbuck, Dirk and Hiemann, Rico and Schierack, Peter and Reinhold, Dirk and Conrad, Karsten}, title = {Digital immunofluorescence enables automated detection of antinuclear antibody endpoint titers avoiding serial dilution}, series = {Clinical Chemistry and Laboratory Medicine}, volume = {52}, journal = {Clinical Chemistry and Laboratory Medicine}, number = {2}, issn = {1437-4331}, doi = {10.1515/cclm-2013-0543}, pages = {e9 -- e11}, language = {en} } @misc{GrossmannRoeberHiemannetal., author = {Großmann, Kai and R{\"o}ber, Nadja and Hiemann, Rico and R{\"o}diger, Stefan and Schierack, Peter and Reinhold, Dirk and Laass, Martin W. and Conrad, Karsten and Roggenbuck, Dirk}, title = {Simultaneous detection of celiac disease-specific IgA antibodies and total IgA}, series = {Autoimmunity Highlights}, volume = {7}, journal = {Autoimmunity Highlights}, number = {2}, issn = {2038-0305}, doi = {10.1007/s13317-016-0073-2}, pages = {10}, language = {en} } @misc{SchierackKletaTedinetal., author = {Schierack, Peter and Kleta, Sylvia and Tedin, Karsten and Babila, T. B. and Oswald, S. and Oelschlaeger, T. A. and Hiemann, Rico and Paetzold, S. and Wieler, Lothar H.}, title = {E. coli Nissle 1917 affects Salmonella adhesion to porcine intestinal epithelial cells}, series = {PLoS One}, volume = {6}, journal = {PLoS One}, number = {2}, doi = {10.1371/journal.pone.0014712}, pages = {10}, language = {en} } @misc{WillitzkiHiemannPetersetal., author = {Willitzki, Annika and Hiemann, Rico and Peters, Vanessa and Sack, Ulrich and Schierack, Peter and R{\"o}diger, Stefan and Anderer, Ursula and Conrad, Karsten and Bogdanos, Dimitrios Petrou and Reinhold, Dirk and Roggenbuck, Dirk}, title = {New PlatformTechnology for Comprehensive Serological Diagnostics of Autoimmune Diseases}, series = {Clinical and Developmental Immunology}, journal = {Clinical and Developmental Immunology}, issn = {1740-2530}, doi = {10.1155/2012/284740}, pages = {1 -- 8}, language = {en} } @misc{SowaGrossmannScholzetal., author = {Sowa, Mandy and Großmann, Kai and Scholz, Juliane and R{\"o}ber, Nadja and R{\"o}diger, Stefan and Schierack, Peter and Conrad, Karsten and Roggenbuck, Dirk and Hiemann, Rico}, title = {Der CytoBead-Assay - Eine neue M{\"o}glichkeit der multiparametrischen Autoantik{\"o}rperanalytik bei systemischen Autoimmunerkrankungen}, series = {Journal of Laboratory Medicine}, volume = {38}, journal = {Journal of Laboratory Medicine}, number = {6}, doi = {10.1515/labmed-2014-0041}, pages = {309 -- 317}, language = {de} } @misc{SowaTrezziHiemannetal., author = {Sowa, Mandy and Trezzi, Barbara and Hiemann, Rico and Schierack, Peter and Großmann, Kai and Scholz, Juliane and Somma, Valentina and Sinico, Renato Alberto and Roggenbuck, Dirk and Radice, Antonella}, title = {Simultaneous comprehensive multiplex autoantibody analysis for rapidly progressive glomerulonephritis}, series = {Medicine}, volume = {95}, journal = {Medicine}, number = {44}, issn = {0025-7974}, doi = {10.1097/MD.0000000000005225}, pages = {5225}, language = {en} } @misc{SowaHiemannSchieracketal., author = {Sowa, Mandy and Hiemann, Rico and Schierack, Peter and Reinhold, Dirk and Conrad, Karsten and Roggenbuck, Dirk}, title = {Next-Generation Autoantibody Testing by Combination of Screening and Confirmation-the CytoBead® Technology}, series = {Clinical Reviews in Allergy \& Immunology}, volume = {53}, journal = {Clinical Reviews in Allergy \& Immunology}, number = {1}, issn = {1559-0267}, doi = {10.1007/s12016-016-8574-3}, pages = {87 -- 104}, language = {en} } @misc{LiedtkeRoseHiemannetal., author = {Liedtke, Victoria and Rose, Laura and Hiemann, Rico and Nasser, Abdullah and R{\"o}diger, Stefan and Bonaventura, Alena and Winkler, Laura and Sowa, Mandy and St{\"o}ckle, Michael and Schierack, Peter and Junker, Kerstin and Roggenbuck, Dirk}, title = {Over-Expression of LEDGF/p75 in HEp-2 Cells Enhances Autoimmune IgG Response in Patients with Benign Prostatic Hyperplasia—A Novel Diagnostic Approach with Therapeutic Consequence?}, series = {International Journal of Molecular Sciences}, volume = {24}, journal = {International Journal of Molecular Sciences}, number = {7}, issn = {1422-0067}, doi = {10.3390/ijms24076166}, abstract = {Lens epithelium-derived growth factor splice variant of 75 kDa (LEDGF/p75) is an autoantigen over-expressed in solid tumors and acts as a stress-related transcriptional co-activator. Participation of autoimmune responses in the pathophysiology of benign prostatic hyperplasia (PBH) and a corresponding immunosuppressive therapy by TNFalpha antagonists has been recently suggested. Thus, autoAb testing could aid in the diagnosis of BPH patients profiting from such therapy. We generated CRISPR/Cas9 modified HEp-2 LEDGF knock-out (KO) and HEp-2 LEDGF/p75 over-expressing (OE) cells and examined IgG autoantibody reactivity to LEDGF/p75 in patients with prostate cancer (PCa, n = 89), bladder cancer (BCa, n = 116), benign prostatic hyperplasia (BPH, n = 103), and blood donors (BD, n = 60) by indirect immunofluorescence assay (IFA). Surprisingly, we could not detect elevated binding of autoAbs against LEDGF/p75 in cancer patients, but autoAb reactivity to LEDGF/p75 OE cells in about 50\% of patients with BPH was unexpectedly significantly increased. Furthermore, a line immunoassay enabling the detection of 18 different autoAbs revealed a significantly increased occurrence of anti-dsDNA autoAbs in 34\% of BPH patients in contrast to tumor patients and BD. This finding was confirmed by anti-mitochondrial (mDNA) autoAb detection with the Crithidia luciliae immunofluorescence test, which also showed a significantly higher prevalence (34\%) of anti-mDNA autoAbs in BPH. In summary, our study provided further evidence for the occurrence of autoimmune responses in BPH. Furthermore, LEDGF/p75 over-expression renders HEp-2 cells more autoantigenic and an ideal target for autoAb analysis in BPH with a potential therapy consequence.}, language = {en} }