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2. Cover Image

Author

Blankestijn, M. A., Otten, H. G., Suer, W., Weimann, A., Knol, E. F., and Knulst, A. C.

Published
2018
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4. 2S protein Ara h 7.0201 has unique epitopes compared to other Ara h 7 isoforms and is comparable to 2S proteins Ara h 2 and 6 in basophil degranulation capacity

Author

Hayen, S.M., Ehlers, A.M., den Hartog Jager, C.F., Garssen, J., Knol, E.F., Knulst, A.C., Suer, W., Willemsen, L.E.M., Otten, H.G., Afd Pharmacology, Pharmacology, Afd Pharmacology, and Pharmacology

Subjects
Models, Molecular, 0301 basic medicine, double blind procedure, Protein Conformation, Fibrinogen receptor, HLA DR antigen, Basophil, Immunoglobulin E, Cell Degranulation, Epitope, law.invention, immunoglobulin E, Epitopes, basophil, 0302 clinical medicine, law, Protein Isoforms, Immunology and Allergy, heterocyclic compounds, receptor type tyrosine protein phosphatase C, Allergens and epitopes, Non-U.S. Gov't, comparative study, peanut extract, epitope, clinical article, biology, predictive value, Chemistry, adult, Research Support, Non-U.S. Gov't, article, food and beverages, peanut allergy, Middle Aged, Basophils, unclassified drug, trypsin, medicine.anatomical_structure, CD123 antigen, female, priority journal, allergenicity, ara h 7 isoform, sequence alignment, Recombinant DNA, isoprotein, lipids (amino acids, peptides, and proteins), blood sampling, diagnostic accuracy, IgE, immunoblotting, 2S Albumins, Plant, amino acid substitution, cross linking, Immunology, Research Support, Basophil degranulation, Structure-Activity Relationship, 03 medical and health sciences, male, fibrinogen receptor, Food allergy, medicine, Journal Article, Humans, Peanut Hypersensitivity, controlled study, Amino Acid Sequence, human, albumin, hydrophobicity, food allergy, carboxy terminal sequence, nonhuman, basophil degranulation, human cell, pepsin A, prediction, sequence homology, Antigens, Plant, biochemical phenomena, metabolism, and nutrition, Molecular biology, carbohydrates (lipids), Basophil activation, 030104 developmental biology, allergens and epitopes, 030228 respiratory system, basophil activation test, biology.protein, ara h 6 isoform, Blood sampling
Abstract

Background: Screening for specific IgE against 2S albumin proteins Ara h 2 and 6 has good positive predictive value in diagnosing peanut allergy. From the third 2S member Ara h 7, 3 isoforms have been identified. Their allergenicity has not been elucidated. Objective: This study investigated the allergenicity of Ara h 7 isoforms compared to Ara h 2 and 6. Methods: Sensitization of 15 DBPCFC-confirmed peanut-allergic patients to recombinant Ara h 2.0201, Ara h 6.01 and isoforms of recombinant Ara h 7 was determined by IgE immunoblotting strips. A basophil activation test (BAT) was performed in 9 patients to determine IgE-cross-linking capacities of the allergens. Sensitivity to the allergens was tested in 5 patients who were sensitized to at least 1 Ara h 7 isoform, by a concentration range in the BAT. 3D prediction models and sequence alignments were used to visualize differences between isoforms and to predict allergenic epitope regions. Results: Sensitization to Ara h 7.0201 was most frequent (80%) and showed to be equally potent as Ara h 2.0201 and 6.01 in inducing basophil degranulation. Sensitization to Ara h 7.0201 together with Ara h 2.0201 and/or 6.01 was observed, indicating the presence of unique epitopes compared to the other 2 isoforms. Differences between the 3 Ara h 7 isoforms were observed in C-terminal cysteine residues, pepsin and trypsin cleavage sites and 3 single amino acid substitutions. Conclusion & clinical relevance: The majority of peanut-allergic patients are sensitized to isoform Ara h 7.0201, which is functionally as active as Ara h 2.0201 and 6.01. Unique epitopes are most likely located in the C-terminus or an allergenic loop region which is a known allergenic epitope region for Ara h 2.0201 and 6.01. Due to its unique epitopes and allergenicity, it is an interesting candidate to improve the diagnostic accuracy for peanut allergy.

Published
2018

6. 2S protein Ara h 7.0201 has unique epitopes compared to other Ara h 7 isoforms and is comparable to 2S proteins Ara h 2 and 6 in basophil degranulation capacity

Author

Afd Pharmacology, Pharmacology, Hayen, S.M., Ehlers, A.M., den Hartog Jager, C.F., Garssen, J., Knol, E.F., Knulst, A.C., Suer, W., Willemsen, L.E.M., Otten, H.G., Afd Pharmacology, Pharmacology, Hayen, S.M., Ehlers, A.M., den Hartog Jager, C.F., Garssen, J., Knol, E.F., Knulst, A.C., Suer, W., Willemsen, L.E.M., and Otten, H.G.

Published
2018

7. 2S protein Ara h 7.0201 has unique epitopes compared to other Ara h 7 isoforms and is comparable to 2S proteins Ara h 2 and 6 in basophil degranulation capacity

Author

Lab Dermatologie/Allergologie, Infection & Immunity, CTI Otten, MS Dermatologie/Allergologie, CTI, Global Health, JC onderzoeksprogramma Cardiovasculaire Epidemiologie, CDL Celdiagnostiek, Hayen, S. M., Ehlers, A. M., den Hartog Jager, C. F., Garssen, J., Knol, E. F., Knulst, A. C., Suer, W., Willemsen, L. E.M., Otten, H. G., Lab Dermatologie/Allergologie, Infection & Immunity, CTI Otten, MS Dermatologie/Allergologie, CTI, Global Health, JC onderzoeksprogramma Cardiovasculaire Epidemiologie, CDL Celdiagnostiek, Hayen, S. M., Ehlers, A. M., den Hartog Jager, C. F., Garssen, J., Knol, E. F., Knulst, A. C., Suer, W., Willemsen, L. E.M., and Otten, H. G.

Published
2018

8. Cover Image

Author

Blankestijn, M. A., primary, Otten, H. G., additional, Suer, W., additional, Weimann, A., additional, Knol, E. F., additional, and Knulst, A. C., additional

Published
2017
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9. Abstracts from the Food Allergy and Anaphylaxis Meeting 2016

Author

Pouessel, G, Claverie, C, Labreuche, J, Renaudin, J-M, Dorkenoo, A, Eb, M, Moneret-Vautrin, A, Deschildre, A, Leteurtre, S, Grabenhenrich, L, Worm, M, Dölle, S, Scherer, K, Hutteger, I, Christensen, M, Bindslev-Jensen, C, Mortz, C, Eller, E, Kjaer, HF, Carneiro-Leão, L, Badas, J, Coimbra, A, Levy, DP, Ben-Shoshan, M, Rimon, A, Benor, S, Arends, NJT, Edelbroek, N, de Groot, H, Emons, JAM, Brand, HKA, Verhoeven, D, van Veen, LN, de Jong, NW, Noh, G, Jang, EH, Pascal, M, Dominguez, O, Piquer, M, Alvaro, M, Jimenez-Feijoo, R, Lozano, J, Machinena, A, del Mar Folqué, M, Giner, MT, Plaza, AM, Turner, P, Patel, N, Vazquez-Ortiz, M, Lindsley, S, Walker, L, Rosenberg, S, Mari, A, Alessandri, C, Giangrieco, I, Tuppo, L, Rafaiani, C, Mitterer, G, Ciancamerla, M, Ferrara, R, Bernardi, ML, Zennaro, D, Tamburrini, M, Ciardiello, MA, Harwanegg, C, Fernandez, A, Selb, R, Egenmann, P, Epstein, M, Hoffmann-Sommergruber, K, Koning, F, Lovik, M, Clare Mills, EN, Moreno, J, van Loveren, H, Wal, J-M, Diesner, S, Bergmayr, C, Pfitzner, B, Assmann, VE, Starkl, P, Endesfelder, D, Eiwegger, T, Szepfalusi, Z, Fehrenbach, H, Jensen-Jarolim, E, Hartmann, A, Pali-Schöll, I, Untersmayr, E, Wille, S, Meyer, P, Klingebiel, C, Lidholm, J, Ehrenberg, A, Östling, J, Cleach, I, Mège, J-L, Vitte, J, Aina, R, Dubiela, P, Pfeifer, S, Bublin, M, Radauer, C, Humeniuk, P, Kabasser, S, Asero, R, Bogas, G, Gomez, F, Campo, P, Salas, M, Doña, I, Barrionuevo, E, Guerrero, MA, Mayorga, C, Prieto, A, Barber, D, Torres, MJ, Jamin, A, Wangorsch, A, Ballmer, B, Vieths, S, Scheurer, S, Apostolovic, D, Mihailovic, J, Krstic, M, Starkhammar, M, Velickovic, TC, Hamsten, C, van Hage, M, van Erp, FC, Knol, EF, Kansen, HM, Pontoppidan, B, Meijer, Y, van der Ent, CK, Knulst, AC, Sayers, R, Brown, H, Custovic, A, Simpson, A, Mills, C, Schulz, J, Akkerdaas, J, Totis, M, Capt, A, Herouet-Guicheney, C, van Ree, R, Banerjee, T, Banerjee, A, Claude, M, Bouchaud, G, Lupi, R, Castan, L, Tranquet, O, Denery-Papini, S, Bodinier, M, Brossard, C, De Poi, R, Gritti, E, De Dominicis, E, Popping, B, de Laureto, PP, Palosuo, K, Kukkonen, AK, Pelkonen, A, Mäkelä, M, Lee, NA, Rost, J, Muralidharan, S, Campbell, D, Mehr, S, Nock, C, Baumert, J, Taylor, S, Mastrorilli, C, Tripodi, S, Caffarelli, C, Perna, S, Di Rienzo Businco, A, Sfika, I, Dondi, A, Bianchi, A, Dascola, CP, Ricci, G, Cipriani, F, Maiello, N, del Giudice, MM, Frediani, T, Frediani, S, Macrì, F, Pistoletti, C, Iacono, ID, Patria, MF, Varin, E, Peroni, D, Comberiati, P, Chini, L, Moschese, V, Lucarelli, S, Bernardini, R, Pingitore, G, Pelosi, U, Olcese, R, Moretti, M, Cirisano, A, Faggian, D, Travaglini, A, Plebani, M, Verga, MC, Calvani, M, Giordani, P, Matricardi, PM, Ontiveros, N, Cabrera-Chavez, F, Galand, J, Beaudouin, E, Pineau, F, Sakai, S, Matsunaga, K, Teshima, R, Larré, C, Denery, S, Tschirner, S, Trendelenburg, V, Schulz, G, Niggemann, B, Beyer, K, Bouferkas, Y, Belabbas, Y, Saidi, D, Kheroua, O, Mecherfi, KEE, Guendouz, M, Haddi, A, Kaddouri, H, Amaral, L, Pereira, A, Rodrigues, S, Datema, M, Jongejan, L, Clausen, M, Knulst, A, Papadopoulos, N, Kowalski, M, de Blay, F, Zwinderman, A, Hoffman-Sommergruber, K, Ballmer-Weber, B, Fernandez-Rivas, M, Deng, S, Yin, J, Eisenmann, C, Nassiri, M, Reinert, R, van der Valk, JPM, van Wijk, RG, Vergouwe, Y, Steyerberg, EW, Reitsma, M, Wichers, HJ, Savelkoul, HFJ, Vlieg-Boerstra, B, Dubois, AEJ, Carolino, F, Rodolfo, A, Cernadas, J, Roa-Medellín, D, Rodriguez-Fernandez, A, Navarro, J, Albendiz, V, Baeza, ML, Intente-Herrero, S, Mikkelsen, A, Mehlig, K, Lissner, L, Verrill, L, Luccioli, S, van Bilsen, J, Kuper, F, Wolterbeek, A, Rankouhi, TR, Verschuren, L, Cnossen, H, Jeurink, P, Garssen, J, Knippels, L, Garthoff, J, Houben, G, Leeman, W, Eleonore Pettersson, M, Schins, AMM, Koppelman, GH, Kollen, BJ, Zubchenko, S, Kuntz, S, Mérida, P, Álvaro, M, Riggioni, C, Castellanos, JH, Jimenez, R, Cap, M, Drumez, E, Lejeune, S, Thumerelle, C, Mordacq, C, Nève, V, Ricò, S, Varini, M, Nocerino, R, Cosenza, L, Amoroso, A, Di Costanzo, M, Di Scala, C, Bedogni, G, Canani, RB, Turner, PJ, Poza-Guedes, P, González-Pérez, R, Sánchez-Machín, I, Matheu-Delgado, V, Wambre, E, Ballegaard, A-S, Madsen, C, Gregersen, J, Bøgh, KL, Aubert, P, Neunlist, M, Magnan, A, Lozano-Ojalvo, D, Pablos-Tanarro, A, Pérez-Rodríguez, L, Molina, E, López-Fandiño, R, Rekima, A, Macchiaverni, P, Turfkruyer, M, Holvoet, S, Dupuis, L, Baiz, N, Annesi-Maesano, I, Mercenier, A, Nutten, S, Verhasselt, V, Mrakovcic-Sutic, I, Banac, S, Sutic, I, Baricev-Novakovic, Z, Pavisic, V, Muñoz-Cano, R, Jiménez-Rodríguez, T, Corbacho, D, Roca-Ferrer, J, Bartra, J, Bulog, A, Micovic, V, Markiewicz, L, Szymkiewicz, A, Szyc, A, Wróblewska, B, Harvey, BM, Harthoorn, LF, Wesley Burks, A, Rentzos, G, Björk, A-LB, Bengtsson, U, Barber, C, Kalicinsky, C, Breynaert, C, Coorevits, L, Jansen, C, Van Hoeyveld, E, Verbeke, K, Kochuyt, A-M, Schrijvers, R, Deleanu, D, Muntean, A, Konstantakopoulou, M, Pasioti, M, Papadopoulou, A, Iliopoulou, A, Mikos, N, Kompoti, E, de Castro, ED, Bartalomé, B, Ue, KL, Griffiths, E, Till, S, Grimshaw, K, Roberts, G, Selby, A, Butiene, I, Larco, JI, Dubakiene, R, Fiandor, A, Fiocchi, A, Sigurdardottir, S, Sprikkelman, A, Schoemaker, A-F, Xepapadaki, P, Keil, T, Cojocariu, Z, Barbado, BS, Iancu, V, Arroabarren, E, Esarte, MG, Arteaga, M, Andrade, MC, Borges, D, Kalil, J, Bianchi, PG, Agondi, RC, Gupta, RK, Sharma, A, Gupta, K, Das, M, Dwivedi, P, Karseladze, R, Jorjoliani, L, Saginadze, L, Tskhakaia, M, Basello, K, Piuri, G, Speciani, AF, Speciani, MC, Camerotto, C, Zinno, F, Pakholchuk, O, Nedelska, S, Pattini, S, Costantino, MT, Peveri, S, Villalta, D, Savi, E, Costanzi, A, Revyakina, VA, Kiseleva, MA, Kuvshinova, ED, Larkova, IA, Shekhetov, AA, Silva, D, Moreira, A, Plácido, J, van der Kleij, H, van Twuijver, E, Sutorius, R, de Kam, P-J, van Odijk, J, Lindqvist, H, Lustig, E, Jácome, AAA, Aguilar, KLB, Domínguez, MG, Hernández, DAM, Caruso, C, Casale, C, Rapaccini, GL, Romano, A, De Vitis, I, Cocco, RR, Aranda, C, Mallozi, MC, Motta, JF, Moraes, L, Pastorino, A, Rosario, N, Goudouris, E, Porto, A, Wandalsen, NF, Sarinho, E, Sano, F, Solé, D, Pitsios, C, Petrodimopoulou, M, Papadopoulou, E, Passioti, M, Kontogianni, M, Adamia, N, Khaleva, E, del Prado, AP, Du Toit, G, Krzych, E, Samolinska-Zawisza, U, Furmanczyk, K, Tomaszewska, A, Raciborski, F, Lipiec, A, Samel-Kowalik, P, Walkiewicz, A, Borowicz, J, Samolinski, B, Nano, AL, Recto, M, Somoza, ML, López, NB, Alzate, DP, Ruano, FJ, Garcimartín, MI, Haroun, E, de la Torre, MV, Rojas, A, Onieva, ML, Canto, G, Rodrigues, A, Forno, A, Cabral, AJ, Gonçalves, R, Vorozhko, I, Sentsova, T, Chernyak, O, Denisova, S, Ilènko, L, Muhortnich, V, Zimmermann, C, Rohrbach, A, Bakhsh, FR, Boudewijn, K, Oomkes-Pilon, A-M, Van Ginkle, D, Šilar, M, Jeverica, A, Vesel, T, Avčin, T, Korošec, P, van der Valk, J, Berends, I, Arends, N, van Maaren, M, Wichers, H, Emons, J, Dubois, A, de Jong, N, Matsyura, O, Besh, L, Huang, C-H, Jan, T-R, Stiefel, G, Tratt, J, Kirk, K, Arasi, S, Caminiti, L, Crisafulli, G, Fiamingo, C, Fresta, J, Pajno, G, Remington, B, Kruizinga, A, Marty Blom, W, Westerhout, J, Bijlsma, S, Blankestijn, M, Otten, H, Klemans, R, Michelsen-Huisman, AD, van Os-Medendorp, H, Kruizinga, AG, Versluis, A, van Duijn, G, de Zeeuw-Brouwer, HM-L, Castenmiller, JJM, Noteborn, HPJM, Houben, GF, Bravin, K, Luyt, D, Javed, B, Couch, P, Munro, C, Padfield, P, Sperrin, M, Byrne, A, Oosthuizen, L, Kelleher, C, Ward, F, Brosnan, N, King, G, Corbet, E, Guzmán, JAH, García, MB, Asensio, O, Navarrete, LV, Larramona, H, Miró, XD, Pyrz, K, Austin, M, Boloh, Y, Galloway, D, Hernandez, P, Hourihane, JOB, Kenna, F, Majkowska-Wojciechowska, B, Regent, L, Themisb, M, Schnadt, S, Semic-Jusufagic, A, Galvin, AD, Kauppila, T, Kuitunen, M, Kitsioulis, NA, Douladiris, N, Kostoudi, S, Manolaraki, I, Mitsias, D, Manousakis, E, Papadopoulos, NG, Knibb, R, Hammond, J, Cooke, R, Yrjänä, J, Hanni, A-M, Vähäsarja, P, Mustonen, O, Dunder, T, Kulmala, P, Lasa, E, D’Amelio, C, Martínez, S, Joral, A, Gastaminza, G, Goikoetxea, MJ, Candy, DCA, Van Ampting, MTJ, Oude Nijhuis, MM, Butt, AM, Peroni, DG, Fox, AT, Knol, J, Michaelis, LJ, Padua, I, Padrao, P, Moreira, P, Barros, R, Sharif, H, Ahmed, M, Gomaa, N, Mens, J, Smit, K, Timmermans, F, Poredoš, T, Jeverica, AK, Sedmak, M, Benedik, E, Accetto, M, Zupančič, M, Yonamine, G, Soldateli, G, Aquilante, B, Pastorino, AC, de Moraes Beck, CL, Gushken, AK, de Barros Dorna, M, dos Santos, CN, Castro, APM, Al-Qahtani, A, Arnaout, R, Khaliq, AR, Amin, R, Sheikh, F, Alvarez, J, Anda, M, Palacios, M, De Prada, M, Ponce, C, Balbino, B, Sibilano, R, Marichal, T, Gaudenzio, N, Karasuyama, H, Bruhns, P, Tsai, M, Reber, LL, Galli, SJ, Ferreira, AR, Cernadas, JR, del Campo García, A, Fernández, SP, Carrera, NS, Sánchez-Cruz, FB, Lorenzo, JRF, Claus, S, Pföhler, C, Ruëff, F, Treudler, R, Jaume, ME, Madroñero, A, Perez, MTG, Julia, JC, Plovdiv, CH, Gethings, L, Langridge, J, Adel-Patient, K, Bernard, H, Barcievic-Jones, I, Sokolova, R, Yankova, R, Ivanovska, M, Murdjeva, M, Popova, T, Dermendzhiev, S, Karjalainen, M, Lehnigk, U, Brown, D, Locklear, JC, Locklear, J, Maris, I, Hourihane, J, Ornelas, C, Caiado, J, Ferreira, MB, Pereira-Barbosa, M, Puente, Y, Daza, JC, Monteseirin, FJ, Ukleja-Sokolowska, N, Gawronska-Ukleja, E, Zbikowska-Gotz, M, Bartuzi, Z, Sokolowski, L, Adams, A, Mahon, B, English, K, Gourdon-Dubois, N, Sellam, L, Pereira, B, Michaud, E, Messaoudi, K, Evrard, B, Fauquert, J-L, Palomares, F, Gomez, G, Rodriguez, MJ, Galindo, L, Molina, A, Paparo, L, Mennini, M, Aitoro, R, Wawrzeńczyk, A, Przybyszewski, M, Sarıcoban, HE, Ugras, M, Yalvac, Z, Flokstra-de Blok, BMJ, van der Velde, JL, Vereda, A, Ippolito, C, Traversa, A, Adriano, D, Bianchi, DM, Gallina, S, Decastelli, L, Makatsori, M, Miles, A, Devetak, SP, Devetak, I, Tabet, SA, Trandbohus, JF, Winther, P, Malling, H-J, Hansen, KS, Garvey, LH, Wang, C-C, Cheng, Y-H, Tung, C-W, Dietrich, M, Marenholz, I, Kalb, B, Grosche, S, Blümchen, K, Schlags, R, Price, M, Rietz, S, Esparza-Gordillo, J, Lau, S, Lee, Y-A, Almontasheri, A, Bahkali, MA, Elshorbagi, S, Alfhaid, A, Altamimi, M, Madbouly, E, Al-Dhekri, H, Arnaout, RK, Basagaña, M, Miquel, S, Bartolomé, B, Brix, B, Rohwer, S, Brandhoff, S, Berger, A, Suer, W, Weimann, A, Bueno, C, Martín-Pedraza, L, Abián, S, Segundo-Acosta, PS, López-Rodríguez, JC, Barderas, R, Batanero, E, Cuesta-Herranz, J, Villalba, MT, Correia, M, Benito-Garcia, F, Arêde, C, Piedade, S, Morais-Almeida, M, Hindley, J, Yarham, R, Kuklinska-Pijanka, A, Gillick, D, Patient, K, Chapman, MD, Miranda, A, Matos, E, Sokolova, A, Rao, H, Baricevic-Jones, I, Smith, F, Xue, W, Magnusdottir, H, Vidarsdottir, AG, Lund, S, Jensen, AB, Ludviksson, BR, Simon, R, Elfont, R, Bennett, S, Voyksner, R, de Lurdes Torre, M, Yürek, S, Faber, MA, Bastiaensen, A, Mangodt, E, van Gasse, A, Decuyper, I, Sabato, V, Hagendorens, MM, Bridts, CH, De Clerck, LS, Ebo, D, Schwarz, S, Ziegert, M, Albroscheit, S, Schwager, C, Kull, S, Behrends, J, Röckendorf, N, Schocker, F, Frey, A, Homann, A, Becker, W-M, Jappe, U, Zaabat, N, Osscini, S, Agabriel, C, Sterling, B, Carsin, A, Liabeuf, V, Maćków, M, Zbróg, A, Bronkowska, M, Courtois, J, Gadisseur, R, Bertholet, C, Lukas, P, Cavalier, E, Delahaut, P, Quinting, B, Gertmo, MB, Hasseus, ET, Barzylovych, V, Oliveira, J, Ensina, LF, Aranda, CS, Dopazo, L, Lopez, R, Perez, R, Santos-Diez, L, Bilbao, A, Garcia, JM, Núñez, IG, Mármol, MÁA, Villarejo, MJB, Martos, JAB, Vergara, MS, García, JMI, Michalska, A, Sergiejko, G, Zacniewski, R, Ghiordanescu, I-M, Deaconu, C, Popescu, M, Bumbacea, RS, Ibranji, A, Nikolla, E, Loloci, G, Juel-Berg, N, Larsen, LF, Poulsen, LK, Marcelino, J, Prata, R, Costa, AC, Duarte, F, Neto, M, Santos, J, Pestana, LC, Sampaio, D, Minale, P, Dignetti, P, Bignardi, D, Nedelea, I, Popescu, F-D, Vieru, M, Secureanu, F-A, Ganea, CS, Vieira, M, Silva, JPM, Watts, T, Watts, S, Lomikovska, M, Peredelskaya, M, Nenasheva, N, Filipovic, I, Zivkovic, Z, Filipovic, D, Higgs, J, Warner, A, Jones, C, Pouessel, G, Claverie, C, Labreuche, J, Renaudin, J-M, Dorkenoo, A, Eb, M, Moneret-Vautrin, A, Deschildre, A, Leteurtre, S, Grabenhenrich, L, Worm, M, Dölle, S, Scherer, K, Hutteger, I, Christensen, M, Bindslev-Jensen, C, Mortz, C, Eller, E, Kjaer, HF, Carneiro-Leão, L, Badas, J, Coimbra, A, Levy, DP, Ben-Shoshan, M, Rimon, A, Benor, S, Arends, NJT, Edelbroek, N, de Groot, H, Emons, JAM, Brand, HKA, Verhoeven, D, van Veen, LN, de Jong, NW, Noh, G, Jang, EH, Pascal, M, Dominguez, O, Piquer, M, Alvaro, M, Jimenez-Feijoo, R, Lozano, J, Machinena, A, del Mar Folqué, M, Giner, MT, Plaza, AM, Turner, P, Patel, N, Vazquez-Ortiz, M, Lindsley, S, Walker, L, Rosenberg, S, Mari, A, Alessandri, C, Giangrieco, I, Tuppo, L, Rafaiani, C, Mitterer, G, Ciancamerla, M, Ferrara, R, Bernardi, ML, Zennaro, D, Tamburrini, M, Ciardiello, MA, Harwanegg, C, Fernandez, A, Selb, R, Egenmann, P, Epstein, M, Hoffmann-Sommergruber, K, Koning, F, Lovik, M, Clare Mills, EN, Moreno, J, van Loveren, H, Wal, J-M, Diesner, S, Bergmayr, C, Pfitzner, B, Assmann, VE, Starkl, P, Endesfelder, D, Eiwegger, T, Szepfalusi, Z, Fehrenbach, H, Jensen-Jarolim, E, Hartmann, A, Pali-Schöll, I, Untersmayr, E, Wille, S, Meyer, P, Klingebiel, C, Lidholm, J, Ehrenberg, A, Östling, J, Cleach, I, Mège, J-L, Vitte, J, Aina, R, Dubiela, P, Pfeifer, S, Bublin, M, Radauer, C, Humeniuk, P, Kabasser, S, Asero, R, Bogas, G, Gomez, F, Campo, P, Salas, M, Doña, I, Barrionuevo, E, Guerrero, MA, Mayorga, C, Prieto, A, Barber, D, Torres, MJ, Jamin, A, Wangorsch, A, Ballmer, B, Vieths, S, Scheurer, S, Apostolovic, D, Mihailovic, J, Krstic, M, Starkhammar, M, Velickovic, TC, Hamsten, C, van Hage, M, van Erp, FC, Knol, EF, Kansen, HM, Pontoppidan, B, Meijer, Y, van der Ent, CK, Knulst, AC, Sayers, R, Brown, H, Custovic, A, Simpson, A, Mills, C, Schulz, J, Akkerdaas, J, Totis, M, Capt, A, Herouet-Guicheney, C, van Ree, R, Banerjee, T, Banerjee, A, Claude, M, Bouchaud, G, Lupi, R, Castan, L, Tranquet, O, Denery-Papini, S, Bodinier, M, Brossard, C, De Poi, R, Gritti, E, De Dominicis, E, Popping, B, de Laureto, PP, Palosuo, K, Kukkonen, AK, Pelkonen, A, Mäkelä, M, Lee, NA, Rost, J, Muralidharan, S, Campbell, D, Mehr, S, Nock, C, Baumert, J, Taylor, S, Mastrorilli, C, Tripodi, S, Caffarelli, C, Perna, S, Di Rienzo Businco, A, Sfika, I, Dondi, A, Bianchi, A, Dascola, CP, Ricci, G, Cipriani, F, Maiello, N, del Giudice, MM, Frediani, T, Frediani, S, Macrì, F, Pistoletti, C, Iacono, ID, Patria, MF, Varin, E, Peroni, D, Comberiati, P, Chini, L, Moschese, V, Lucarelli, S, Bernardini, R, Pingitore, G, Pelosi, U, Olcese, R, Moretti, M, Cirisano, A, Faggian, D, Travaglini, A, Plebani, M, Verga, MC, Calvani, M, Giordani, P, Matricardi, PM, Ontiveros, N, Cabrera-Chavez, F, Galand, J, Beaudouin, E, Pineau, F, Sakai, S, Matsunaga, K, Teshima, R, Larré, C, Denery, S, Tschirner, S, Trendelenburg, V, Schulz, G, Niggemann, B, Beyer, K, Bouferkas, Y, Belabbas, Y, Saidi, D, Kheroua, O, Mecherfi, KEE, Guendouz, M, Haddi, A, Kaddouri, H, Amaral, L, Pereira, A, Rodrigues, S, Datema, M, Jongejan, L, Clausen, M, Knulst, A, Papadopoulos, N, Kowalski, M, de Blay, F, Zwinderman, A, Hoffman-Sommergruber, K, Ballmer-Weber, B, Fernandez-Rivas, M, Deng, S, Yin, J, Eisenmann, C, Nassiri, M, Reinert, R, van der Valk, JPM, van Wijk, RG, Vergouwe, Y, Steyerberg, EW, Reitsma, M, Wichers, HJ, Savelkoul, HFJ, Vlieg-Boerstra, B, Dubois, AEJ, Carolino, F, Rodolfo, A, Cernadas, J, Roa-Medellín, D, Rodriguez-Fernandez, A, Navarro, J, Albendiz, V, Baeza, ML, Intente-Herrero, S, Mikkelsen, A, Mehlig, K, Lissner, L, Verrill, L, Luccioli, S, van Bilsen, J, Kuper, F, Wolterbeek, A, Rankouhi, TR, Verschuren, L, Cnossen, H, Jeurink, P, Garssen, J, Knippels, L, Garthoff, J, Houben, G, Leeman, W, Eleonore Pettersson, M, Schins, AMM, Koppelman, GH, Kollen, BJ, Zubchenko, S, Kuntz, S, Mérida, P, Álvaro, M, Riggioni, C, Castellanos, JH, Jimenez, R, Cap, M, Drumez, E, Lejeune, S, Thumerelle, C, Mordacq, C, Nève, V, Ricò, S, Varini, M, Nocerino, R, Cosenza, L, Amoroso, A, Di Costanzo, M, Di Scala, C, Bedogni, G, Canani, RB, Turner, PJ, Poza-Guedes, P, González-Pérez, R, Sánchez-Machín, I, Matheu-Delgado, V, Wambre, E, Ballegaard, A-S, Madsen, C, Gregersen, J, Bøgh, KL, Aubert, P, Neunlist, M, Magnan, A, Lozano-Ojalvo, D, Pablos-Tanarro, A, Pérez-Rodríguez, L, Molina, E, López-Fandiño, R, Rekima, A, Macchiaverni, P, Turfkruyer, M, Holvoet, S, Dupuis, L, Baiz, N, Annesi-Maesano, I, Mercenier, A, Nutten, S, Verhasselt, V, Mrakovcic-Sutic, I, Banac, S, Sutic, I, Baricev-Novakovic, Z, Pavisic, V, Muñoz-Cano, R, Jiménez-Rodríguez, T, Corbacho, D, Roca-Ferrer, J, Bartra, J, Bulog, A, Micovic, V, Markiewicz, L, Szymkiewicz, A, Szyc, A, Wróblewska, B, Harvey, BM, Harthoorn, LF, Wesley Burks, A, Rentzos, G, Björk, A-LB, Bengtsson, U, Barber, C, Kalicinsky, C, Breynaert, C, Coorevits, L, Jansen, C, Van Hoeyveld, E, Verbeke, K, Kochuyt, A-M, Schrijvers, R, Deleanu, D, Muntean, A, Konstantakopoulou, M, Pasioti, M, Papadopoulou, A, Iliopoulou, A, Mikos, N, Kompoti, E, de Castro, ED, Bartalomé, B, Ue, KL, Griffiths, E, Till, S, Grimshaw, K, Roberts, G, Selby, A, Butiene, I, Larco, JI, Dubakiene, R, Fiandor, A, Fiocchi, A, Sigurdardottir, S, Sprikkelman, A, Schoemaker, A-F, Xepapadaki, P, Keil, T, Cojocariu, Z, Barbado, BS, Iancu, V, Arroabarren, E, Esarte, MG, Arteaga, M, Andrade, MC, Borges, D, Kalil, J, Bianchi, PG, Agondi, RC, Gupta, RK, Sharma, A, Gupta, K, Das, M, Dwivedi, P, Karseladze, R, Jorjoliani, L, Saginadze, L, Tskhakaia, M, Basello, K, Piuri, G, Speciani, AF, Speciani, MC, Camerotto, C, Zinno, F, Pakholchuk, O, Nedelska, S, Pattini, S, Costantino, MT, Peveri, S, Villalta, D, Savi, E, Costanzi, A, Revyakina, VA, Kiseleva, MA, Kuvshinova, ED, Larkova, IA, Shekhetov, AA, Silva, D, Moreira, A, Plácido, J, van der Kleij, H, van Twuijver, E, Sutorius, R, de Kam, P-J, van Odijk, J, Lindqvist, H, Lustig, E, Jácome, AAA, Aguilar, KLB, Domínguez, MG, Hernández, DAM, Caruso, C, Casale, C, Rapaccini, GL, Romano, A, De Vitis, I, Cocco, RR, Aranda, C, Mallozi, MC, Motta, JF, Moraes, L, Pastorino, A, Rosario, N, Goudouris, E, Porto, A, Wandalsen, NF, Sarinho, E, Sano, F, Solé, D, Pitsios, C, Petrodimopoulou, M, Papadopoulou, E, Passioti, M, Kontogianni, M, Adamia, N, Khaleva, E, del Prado, AP, Du Toit, G, Krzych, E, Samolinska-Zawisza, U, Furmanczyk, K, Tomaszewska, A, Raciborski, F, Lipiec, A, Samel-Kowalik, P, Walkiewicz, A, Borowicz, J, Samolinski, B, Nano, AL, Recto, M, Somoza, ML, López, NB, Alzate, DP, Ruano, FJ, Garcimartín, MI, Haroun, E, de la Torre, MV, Rojas, A, Onieva, ML, Canto, G, Rodrigues, A, Forno, A, Cabral, AJ, Gonçalves, R, Vorozhko, I, Sentsova, T, Chernyak, O, Denisova, S, Ilènko, L, Muhortnich, V, Zimmermann, C, Rohrbach, A, Bakhsh, FR, Boudewijn, K, Oomkes-Pilon, A-M, Van Ginkle, D, Šilar, M, Jeverica, A, Vesel, T, Avčin, T, Korošec, P, van der Valk, J, Berends, I, Arends, N, van Maaren, M, Wichers, H, Emons, J, Dubois, A, de Jong, N, Matsyura, O, Besh, L, Huang, C-H, Jan, T-R, Stiefel, G, Tratt, J, Kirk, K, Arasi, S, Caminiti, L, Crisafulli, G, Fiamingo, C, Fresta, J, Pajno, G, Remington, B, Kruizinga, A, Marty Blom, W, Westerhout, J, Bijlsma, S, Blankestijn, M, Otten, H, Klemans, R, Michelsen-Huisman, AD, van Os-Medendorp, H, Kruizinga, AG, Versluis, A, van Duijn, G, de Zeeuw-Brouwer, HM-L, Castenmiller, JJM, Noteborn, HPJM, Houben, GF, Bravin, K, Luyt, D, Javed, B, Couch, P, Munro, C, Padfield, P, Sperrin, M, Byrne, A, Oosthuizen, L, Kelleher, C, Ward, F, Brosnan, N, King, G, Corbet, E, Guzmán, JAH, García, MB, Asensio, O, Navarrete, LV, Larramona, H, Miró, XD, Pyrz, K, Austin, M, Boloh, Y, Galloway, D, Hernandez, P, Hourihane, JOB, Kenna, F, Majkowska-Wojciechowska, B, Regent, L, Themisb, M, Schnadt, S, Semic-Jusufagic, A, Galvin, AD, Kauppila, T, Kuitunen, M, Kitsioulis, NA, Douladiris, N, Kostoudi, S, Manolaraki, I, Mitsias, D, Manousakis, E, Papadopoulos, NG, Knibb, R, Hammond, J, Cooke, R, Yrjänä, J, Hanni, A-M, Vähäsarja, P, Mustonen, O, Dunder, T, Kulmala, P, Lasa, E, D’Amelio, C, Martínez, S, Joral, A, Gastaminza, G, Goikoetxea, MJ, Candy, DCA, Van Ampting, MTJ, Oude Nijhuis, MM, Butt, AM, Peroni, DG, Fox, AT, Knol, J, Michaelis, LJ, Padua, I, Padrao, P, Moreira, P, Barros, R, Sharif, H, Ahmed, M, Gomaa, N, Mens, J, Smit, K, Timmermans, F, Poredoš, T, Jeverica, AK, Sedmak, M, Benedik, E, Accetto, M, Zupančič, M, Yonamine, G, Soldateli, G, Aquilante, B, Pastorino, AC, de Moraes Beck, CL, Gushken, AK, de Barros Dorna, M, dos Santos, CN, Castro, APM, Al-Qahtani, A, Arnaout, R, Khaliq, AR, Amin, R, Sheikh, F, Alvarez, J, Anda, M, Palacios, M, De Prada, M, Ponce, C, Balbino, B, Sibilano, R, Marichal, T, Gaudenzio, N, Karasuyama, H, Bruhns, P, Tsai, M, Reber, LL, Galli, SJ, Ferreira, AR, Cernadas, JR, del Campo García, A, Fernández, SP, Carrera, NS, Sánchez-Cruz, FB, Lorenzo, JRF, Claus, S, Pföhler, C, Ruëff, F, Treudler, R, Jaume, ME, Madroñero, A, Perez, MTG, Julia, JC, Plovdiv, CH, Gethings, L, Langridge, J, Adel-Patient, K, Bernard, H, Barcievic-Jones, I, Sokolova, R, Yankova, R, Ivanovska, M, Murdjeva, M, Popova, T, Dermendzhiev, S, Karjalainen, M, Lehnigk, U, Brown, D, Locklear, JC, Locklear, J, Maris, I, Hourihane, J, Ornelas, C, Caiado, J, Ferreira, MB, Pereira-Barbosa, M, Puente, Y, Daza, JC, Monteseirin, FJ, Ukleja-Sokolowska, N, Gawronska-Ukleja, E, Zbikowska-Gotz, M, Bartuzi, Z, Sokolowski, L, Adams, A, Mahon, B, English, K, Gourdon-Dubois, N, Sellam, L, Pereira, B, Michaud, E, Messaoudi, K, Evrard, B, Fauquert, J-L, Palomares, F, Gomez, G, Rodriguez, MJ, Galindo, L, Molina, A, Paparo, L, Mennini, M, Aitoro, R, Wawrzeńczyk, A, Przybyszewski, M, Sarıcoban, HE, Ugras, M, Yalvac, Z, Flokstra-de Blok, BMJ, van der Velde, JL, Vereda, A, Ippolito, C, Traversa, A, Adriano, D, Bianchi, DM, Gallina, S, Decastelli, L, Makatsori, M, Miles, A, Devetak, SP, Devetak, I, Tabet, SA, Trandbohus, JF, Winther, P, Malling, H-J, Hansen, KS, Garvey, LH, Wang, C-C, Cheng, Y-H, Tung, C-W, Dietrich, M, Marenholz, I, Kalb, B, Grosche, S, Blümchen, K, Schlags, R, Price, M, Rietz, S, Esparza-Gordillo, J, Lau, S, Lee, Y-A, Almontasheri, A, Bahkali, MA, Elshorbagi, S, Alfhaid, A, Altamimi, M, Madbouly, E, Al-Dhekri, H, Arnaout, RK, Basagaña, M, Miquel, S, Bartolomé, B, Brix, B, Rohwer, S, Brandhoff, S, Berger, A, Suer, W, Weimann, A, Bueno, C, Martín-Pedraza, L, Abián, S, Segundo-Acosta, PS, López-Rodríguez, JC, Barderas, R, Batanero, E, Cuesta-Herranz, J, Villalba, MT, Correia, M, Benito-Garcia, F, Arêde, C, Piedade, S, Morais-Almeida, M, Hindley, J, Yarham, R, Kuklinska-Pijanka, A, Gillick, D, Patient, K, Chapman, MD, Miranda, A, Matos, E, Sokolova, A, Rao, H, Baricevic-Jones, I, Smith, F, Xue, W, Magnusdottir, H, Vidarsdottir, AG, Lund, S, Jensen, AB, Ludviksson, BR, Simon, R, Elfont, R, Bennett, S, Voyksner, R, de Lurdes Torre, M, Yürek, S, Faber, MA, Bastiaensen, A, Mangodt, E, van Gasse, A, Decuyper, I, Sabato, V, Hagendorens, MM, Bridts, CH, De Clerck, LS, Ebo, D, Schwarz, S, Ziegert, M, Albroscheit, S, Schwager, C, Kull, S, Behrends, J, Röckendorf, N, Schocker, F, Frey, A, Homann, A, Becker, W-M, Jappe, U, Zaabat, N, Osscini, S, Agabriel, C, Sterling, B, Carsin, A, Liabeuf, V, Maćków, M, Zbróg, A, Bronkowska, M, Courtois, J, Gadisseur, R, Bertholet, C, Lukas, P, Cavalier, E, Delahaut, P, Quinting, B, Gertmo, MB, Hasseus, ET, Barzylovych, V, Oliveira, J, Ensina, LF, Aranda, CS, Dopazo, L, Lopez, R, Perez, R, Santos-Diez, L, Bilbao, A, Garcia, JM, Núñez, IG, Mármol, MÁA, Villarejo, MJB, Martos, JAB, Vergara, MS, García, JMI, Michalska, A, Sergiejko, G, Zacniewski, R, Ghiordanescu, I-M, Deaconu, C, Popescu, M, Bumbacea, RS, Ibranji, A, Nikolla, E, Loloci, G, Juel-Berg, N, Larsen, LF, Poulsen, LK, Marcelino, J, Prata, R, Costa, AC, Duarte, F, Neto, M, Santos, J, Pestana, LC, Sampaio, D, Minale, P, Dignetti, P, Bignardi, D, Nedelea, I, Popescu, F-D, Vieru, M, Secureanu, F-A, Ganea, CS, Vieira, M, Silva, JPM, Watts, T, Watts, S, Lomikovska, M, Peredelskaya, M, Nenasheva, N, Filipovic, I, Zivkovic, Z, Filipovic, D, Higgs, J, Warner, A, and Jones, C

Published
2017

13. TDPAC studies of the iron-molybdenum cofactor in nitrogenase

Author

Pohlmann, C, Appel, H, Thies, W. G., Müller, Achim, Schneider, Klaus, and Suer, W

Subjects
inorganic chemicals
Abstract

The uptake and the processing of molybdenum in nitrogen fixing bacteria was studied applying the TDPAC-technique with radioactive Mo-99. The observation of the nuclear quadrupole frequencies allowed a 'finger-printing' of the characteristic binding states in three bacteria species. The measurements have been carried out with intact cells and with the isolated proteins. In one bacterium a molybdenum storage protein was identified.

14. IgE-binding to vicilin-like antimicrobial peptides is associated with systemic reactions to macadamia nut.

Author

Ehlers AM, Rohwer S, Otten HG, Brix B, Le TM, Suer W, and Knulst AC

Abstract

Background: Macadamia nut can induce fatal allergic reactions and changes in dietary habits will raise their consumption in industrialised countries. Until now diagnosis of macadamia nut allergy by sIgE solely relies on the macadamia nut extract, but single components are lacking., Methods: Macadamia nut proteins recognised by IgE from 2 macadamia nut extract positive sera were identified by mass spectrometry (vicilin-like antimicrobial peptides: VLAP). Sensitisation to macadamia nut extract and heterologously expressed isoform VLAP-2-3 was evaluated in 82 nut allergic (NA) and 27 tolerant (NT) patients (no tree nut allergy reported) comprehending 10 macadamia nut allergic (MA) and 18 explicitly reported macadamia nut tolerant patients (MT), using line blots. Co-sensitisation to additional VLAP isoforms and other vicilins was evaluated in 8 MA, 12 MT and 14 NA patients sensitised to VLAP-2-3. Functional properties were determined by indirect basophil activation., Results: Even though proteins recognised by IgE were identified as VLAP-2-1, 2-2 and 2-3, only peptides specifically belonging to VLAP-2-3 were detected by mass spectrometry. The macadamia nut extract was recognised by 33% of NA patients (27/82) including 3 MA patients and 26% of NT patients (7/27, 3 MT). Similarly, 29% of NA (24/82) patients showed partly strong sIgE-binding to VLAP-2-3 including 3 MA patients with systemic reactions to macadamia nut. Contrary, VLAP-2-3 was recognised by only 2 NT (1 MT) patients (7%) with very low sIgE titres. Simultaneous recognition of the isoforms VLAP-2-1 and 2-2 was observed in all patients positive for VLAP-2-3 with partly reduced sIgE titres in 59% of these patients. Additionally, all three VLAP isoforms were able to repeatedly induce BAT reactivity upon sensitisation with a MA serum., Conclusion: VLAP proteins are the first described macadamia nut components with serological and functional allergenic properties and they are associated with systemic reactions to macadamia nut.

Published
2020
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15. Detection of specific IgE against linear epitopes from Gal d 1 has additional value in diagnosing hen's egg allergy in adults.

Author

Ehlers AM, Otten HG, Wierzba E, Flügge U, Le TM, Knulst AC, and Suer W

Subjects
Adult, Aged, Biomarkers blood, Egg Hypersensitivity blood, Egg Hypersensitivity immunology, Egg Proteins immunology, Female, Humans, Male, Microarray Analysis, Middle Aged, Ovomucin immunology, Predictive Value of Tests, Recombinant Proteins administration & dosage, Recombinant Proteins immunology, Retrospective Studies, Young Adult, Egg Hypersensitivity diagnosis, Egg Proteins administration & dosage, Immunodominant Epitopes, Immunoglobulin E blood, Immunologic Tests, Ovomucin administration & dosage
Abstract

Background: Although hen's egg allergy is more prevalent in children, up to 0.6% of adults from different European countries suffer from a persistent or newly onset hen's egg allergy, making accurate diagnosis in adults necessary. However, sensitization to hen's egg extracts, components and linear epitopes is solely studied in children., Methods: Hen's egg allergic (n = 16) and tolerant (n = 19) adults were selected by sensitization towards recombinant components rGal d 1 and/or 3. Sensitization profiles towards egg white and yolk extract and the native components Gal d 1, 2, 3 and 4 were respectively evaluated with the ImmunoCAP or the EUROLINE system. Characterization of linear epitopes was performed with a peptide microarray containing 15mer peptides representing the entire sequence of mature Gal d 1 and 3., Results: Overall, sIgE titres against hen's egg extracts and single components overlapped largely between allergic and tolerant adults. Although the median sIgE/sIgG4 ratio to Gal d 1 was increased in allergic adults, the range was comparable between both groups. Clinically relevant sensitization to Gal d 1 was confirmed by sIgE-binding to the linear epitopes aa30-41, aa39-50 or aa84-95 in 6/13 allergic adults, mainly suffering from objective symptoms. In comparison, these epitopes were recognized by 1/15 tolerant patient. Only a few linear epitopes were detected for Gal d 3, suggesting a greater importance of conformational epitopes for the recognition of Gal d 3., Conclusion and Clinical Relevance: Specific IgE-binding to linear epitopes of Gal d 1 is highly specific in identifying hen's egg allergic adults with objective symptoms., (© 2020 The Authors. Clinical & Experimental Allergy published by John Wiley & Sons Ltd.)

Published
2020
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16. Ara h 7 isoforms share many linear epitopes: Are 3D epitopes crucial to elucidate divergent abilities?

Author

Ehlers AM, Klinge M, Suer W, Weimann Y, Knulst AC, Besa F, Le TM, and Otten HG

Subjects
Adolescent, Adult, Aged, Female, Humans, Male, Middle Aged, Antigens, Plant immunology, Arachis immunology, Epitope Mapping, Epitopes immunology, Immunoglobulin E immunology, Immunoglobulin G immunology
Abstract

Background: The peanut allergens Ara h 2, h 6, and h 7 are potent allergens and can trigger severe reactions. Ara h 7 consists of three isoforms differing in their ability to induce basophil degranulation, whereas the ability of Ara h 7.0201 is comparable to Ara h 2 and 6 as shown in previous literature., Objective: To identify linear epitopes of Ara h 7.0101, Ara h 7.0201 and Ara h 7.0301 recognized by IgE and IgG4 from patients sensitized to Ara h 7 and to investigate their potential to elucidate divergent abilities of the Ara h 7 isoforms in inducing basophil activation., Methods: Linear epitopes recognized by IgE and IgG4 were mapped by peptide microarray analysis containing 15-mer peptides of Ara h 2.0201, 6, 7.0101, 7.0201 and 7.0301 and 39 peanut allergic patients sensitized to Ara h 7 (discovery). For validation, 20-mer peptides containing the minimal epitope and surrounding amino acids were incubated with 25 sensitized patients and 10 controls (validation)., Results: Three out of 14 linear epitopes were unique for each isoform (Ara h 7.0101: aa 97-109; Ara h 7.0201: aa 122-133; Ara h 7.0301: aa 65-74) but scarcely recognized by IgE. The main linear IgE epitope (aa 51-57) located in the long flexible loop of all Ara h 7 isoforms was bound by antibodies from 31% of the patients (discovery and validation cohort). Regarding IgG4, 55% of the patients recognized an epitope present on all isoforms (aa 55-65), whereas epitope aa 129-137, only present on Ara h 7.0101/0.0301, was recognized by 38% of the patients. Recognition was highly individual, although 20% of the patients recognized any linear epitope neither by IgE nor by IgG4 despite a low mean z-score of ≥ 1.7. Remarkably, only 50% of the patients recognized one or more epitopes by IgE., Conclusion & Clinical Relevance: Ara h 7 isoforms share many linear epitopes being easily accessible for antibody binding. Unique epitopes, essential to elucidate divergent potencies, were scarcely recognized, suggesting a crucial involvement of conformational epitopes., (© 2019 The Authors. Clinical & Experimental Allergy published by John Wiley & Sons Ltd.)

Published
2019
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17. Sesame oleosins are minor allergens.

Author

Ehlers AM, Rossnagel M, Brix B, Blankestijn MA, Le TM, Suer W, Otten HG, and Knulst AC

Abstract

Background: In daily practice, one-third of sesame allergic patients, confirmed by clinical history or food challenge, do not show any detectable specific IgE using current diagnostics. Currently used sesame extracts are water-based and therefore lacking hydrophobic proteins like oleosins. Oleosins, the stabilizer of lipid droplets in plants, are described as allergens in sesame, peanut and hazelnut. In this study, we examine the role of oleosins in sesame allergy and their potential cross-reactivity between sesame and (pea)nuts., Methods: Specific IgE and IgG sensitisation to native and heterologously expressed sesame components and oleosins from other nuts, free of seed storage proteins, was assessed by line blot and sera from 17 sesame allergic patients without detectable specific IgE sensitisation to sesame, and compared to 18 sesame allergic and 13 tolerant patients with specific IgE sensitisation to sesame., Results: Sesame allergic patients without sensitisation showed no specific IgE to the tested sesame oleosins or components. Low levels of specific IgE to sesame oleosins were detected in 17% of sesame allergic and 15% of tolerant patients with sIgE sensitisation. Oleosins were recognised by serum IgG from multiple patients confirming immune reactivity and excluding technical issues leading to lack of specific IgE-binding to oleosins., Conclusion: Sesame oleosins are minor allergens and appear to have no additonal value in diagnosing sesame allergy in adults based on sIgE and sIgG detection. There is a high need for additional diagnostic tools in those patients to minimize the number of required food challenges., Competing Interests: Competing interestsB. Brix, M. Rossnagel and W. Suer are employees of EUROIMMUN. The research position of A. Ehlers is partially funded by EUROIMMUN. Other authors have no competing interests to declare.

Published
2019
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18. 2S protein Ara h 7.0201 has unique epitopes compared to other Ara h 7 isoforms and is comparable to 2S proteins Ara h 2 and 6 in basophil degranulation capacity.

Author

Hayen SM, Ehlers AM, den Hartog Jager CF, Garssen J, Knol EF, Knulst AC, Suer W, Willemsen LEM, and Otten HG

Subjects
2S Albumins, Plant chemistry, Adult, Amino Acid Sequence, Antigens, Plant chemistry, Basophils metabolism, Epitopes chemistry, Female, Humans, Immunoglobulin E immunology, Male, Middle Aged, Models, Molecular, Peanut Hypersensitivity diagnosis, Protein Conformation, Protein Isoforms, Structure-Activity Relationship, 2S Albumins, Plant immunology, Antigens, Plant immunology, Basophils immunology, Cell Degranulation immunology, Epitopes immunology, Peanut Hypersensitivity immunology
Abstract

Background: Screening for specific IgE against 2S albumin proteins Ara h 2 and 6 has good positive predictive value in diagnosing peanut allergy. From the third 2S member Ara h 7, 3 isoforms have been identified. Their allergenicity has not been elucidated., Objective: This study investigated the allergenicity of Ara h 7 isoforms compared to Ara h 2 and 6., Methods: Sensitization of 15 DBPCFC-confirmed peanut-allergic patients to recombinant Ara h 2.0201, Ara h 6.01 and isoforms of recombinant Ara h 7 was determined by IgE immunoblotting strips. A basophil activation test (BAT) was performed in 9 patients to determine IgE-cross-linking capacities of the allergens. Sensitivity to the allergens was tested in 5 patients who were sensitized to at least 1 Ara h 7 isoform, by a concentration range in the BAT. 3D prediction models and sequence alignments were used to visualize differences between isoforms and to predict allergenic epitope regions., Results: Sensitization to Ara h 7.0201 was most frequent (80%) and showed to be equally potent as Ara h 2.0201 and 6.01 in inducing basophil degranulation. Sensitization to Ara h 7.0201 together with Ara h 2.0201 and/or 6.01 was observed, indicating the presence of unique epitopes compared to the other 2 isoforms. Differences between the 3 Ara h 7 isoforms were observed in C-terminal cysteine residues, pepsin and trypsin cleavage sites and 3 single amino acid substitutions., Conclusion & Clinical Relevance: The majority of peanut-allergic patients are sensitized to isoform Ara h 7.0201, which is functionally as active as Ara h 2.0201 and 6.01. Unique epitopes are most likely located in the C-terminus or an allergenic loop region which is a known allergenic epitope region for Ara h 2.0201 and 6.01. Due to its unique epitopes and allergenicity, it is an interesting candidate to improve the diagnostic accuracy for peanut allergy., (© 2018 The Authors. Clinical & Experimental Allergy Published by John Wiley & Sons Ltd.)

Published
2018
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19. The glycoproteins C and G are equivalent target antigens for the determination of herpes simplex virus type 1-specific antibodies.

Author

Scheper T, Saschenbrecker S, Steinhagen K, Sauerbrei A, Suer W, Meyer W, Schlumberger W, and Wandinger KP

Subjects
Blotting, Western methods, Cytomegalovirus immunology, Enzyme-Linked Immunosorbent Assay methods, Herpesvirus 2, Human immunology, Herpesvirus 3, Human immunology, Herpesvirus 4, Human immunology, Humans, Sensitivity and Specificity, Antibodies, Viral blood, Antigens, Viral, Herpes Simplex diagnosis, Herpes Simplex virology, Herpesvirus 1, Human immunology, Viral Envelope Proteins
Abstract

Seroreactivity to the glycoproteins C and G of herpes simplex virus type 1 (HSV-1) was compared in 310 serum samples using a Western blot assay containing a whole antigen extract of HSV-1 and an ELISA employing gC1 isolated from HSV-1. The prevalence of reactivity to gC1 was 75.8% by Western blot and 73.9% by ELISA, while antibody responses to gG1 were detected in 72.9% of sera by Western blot. An absolute correlation of 96.1% between the reactivity to gC1 and gG1 was demonstrated using the Western blot. The gC1-based ELISA correlated with Western blot detection of anti-gC1 and anti-gG1 antibodies in 95.2 and 97.7% of samples, respectively. 3.2% of all sera were reactive with gC1 in Western blot and/or ELISA, but were negative for anti-gG1. For analysis of cross-reactivity, antibodies against HSV-2, Epstein-Barr virus, varicella-zoster virus and cytomegalovirus were determined. The prevalence of antibodies against each individual virus was identical in the groups of sera reactive with gC1 or gG1. These findings indicate that gC1 and gG1 are equivalent antigenic targets for the type-specific serodiagnosis of HSV-1 infections., (Copyright 2010 Elsevier B.V. All rights reserved.)

Published
2010
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20. Autoantibodies in SLE but not in scleroderma react with protein-stripped nucleosomes.

Author

Suer W, Dähnrich C, Schlumberger W, and Stöcker W

Subjects
Antibodies, Antinuclear blood, Autoantigens isolation & purification, Case-Control Studies, DNA immunology, DNA isolation & purification, DNA Topoisomerases, Type I, Enzyme-Linked Immunosorbent Assay, Humans, Nuclear Proteins immunology, Polymyositis immunology, Sjogren's Syndrome immunology, Autoantibodies blood, Lupus Erythematosus, Systemic immunology, Nucleosomes immunology, Scleroderma, Diffuse immunology
Abstract

Autoantibodies against nucleosomes (ANuA) are known to be sensitive markers for systemic lupus erythematosus (SLE), but their clinical relevance seemed to be limited because sera from patients with progressive systemic sclerosis (PSS) also showed positive reactions with conventional ANuA ELISA test systems (anti-Nu1 ELISA). It was generally assumed thatANuA were associated with both diseases. Using discontinuous sucrose gradient centrifugation to generate pure nucleosomes, we discovered by chance that at the 30-50% sucrose interface an antigen (Nu2) banded which was demonstrably free of non-histone components and histone H1. The two different nucleosome preparations, Nu1 and Nu2, were used in parallel as antigenic substrates in standardised ELISA tests to analyse sera from SLE (295 patients), PSS (119) and patients with other rheumatic diseases (101). With Nu1, 62% of the SLE and 52% of the PSS sera showed positive reactions. Two sera from patients suffering from Sjögren's syndrome (SS) and one from polymyositis were also positive. Using the Nu2 preparation, 58% of the SLE but none of the PSS sera showed a positive reaction. One serum from a patient with SS was also positive. It could be shown that it was the PSS-specific autoantigen Scl-70 in the nucleosome preparation (Nu1) which contributed to the positive reactions of the PSS sera in conventional ANuA test systems, whereas in the Nu2 preparation no remaining Scl-70 was detectable. The present study definitely proved that ANuA are highly and specifically associated with SLE but not with PSS.

Published
2004
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21. Comparative in-vivo and in-vitro 99Mo-time-differential-perturbed-angular-correlation studies on the nitrogenase MoFe protein and on other Mo species of different N2-fixing bacteria.

Author

Muller A, Suer W, Pohlmann C, Schneider K, Thies WG, and Appel H

Subjects
Azotobacter vinelandii metabolism, Klebsiella pneumoniae metabolism, Molybdenum metabolism, Molybdoferredoxin chemistry, Rhodobacter capsulatus metabolism, Spectrum Analysis, Azotobacter vinelandii enzymology, Klebsiella pneumoniae enzymology, Molybdoferredoxin metabolism, Nitrogen Fixation, Nitrogenase chemistry, Rhodobacter capsulatus enzymology
Abstract

Klebsiella pneumoniae, Azotobacter vinelandii and Rhodobacter capsulatus were cultivated in media containing 99MoO4(2-) . The distribution of 99Mo in cells grown under conditions of repression and derepression of nitrogenase synthesis, was investigated by anion-exchange (DEAE-Sephacel) chromatography. Cells of K. pneumoniae took up MoO4(2-) only under conditions of derepression of nitrogenase thus serving the formation of the FeMo cofactor of the MoFe protein (Kp1) as the predominant Mo-containing species. In the case of A. vinelandii, under diazotrophic growth conditions, molybdenum was preferably incorporated into the nitrogenase MoFe protein (Av1). However, if excess amounts of molybdate were present in the medium, molybdenum was also bound to the Mo-storage protein. In the presence of 20 mM NH4+, conditions which completely repress nitrogenase formation, molybdenum accumulated in the Mo-storage protein exclusively. This protein proved to be unstable towards DEAE-Sephacel, apparently releasing all the molybdenum in form of MoO4(2-) during the fractionation procedure. R. capsulatus contained, in addition to the MoFe protein (Rc1), significant amounts of other not-yet-identified Mo species, which partially are formed under conditions of both, repression and derepression of nitrogenase. The Mo centers of all these compounds were characterized by measuring the nuclear quadrupole interaction of the process 99Mo(beta-)99Tc using time differential perturbed angular correlation spectroscopy. The quadrupole coupling constant (v(Q)) determined for the Mo center in MoFe proteins was consistently in the range 66-81 MHz. The values of the coupling constants determined with intact cells and with the isolated, partially purified, MoFe proteins were in very good agreement. For the Mo-storage protein of A. vinelandii, a quadrupole coupling constant of approximately 180 MHz was determined by measurements performed with nitrogenase-repressed cells as well as with gel-filtered cell-free extracts. Our work proves that the relevant study of hyperfine interactions allows the identification of the MoFe protein and also other Mo proteins in vivo as well as in vitro.

Published
1997
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