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1. Abstracts from the 10th C1-inhibitor deficiency workshop

Author

Alvin H. Schmaier, Marco Cicardi, Avner Reshef, Dumitru Moldovan, Attila Mócsai, Margarita López-Trascasa, Alberto López Lera, Nancy J. Brown, Anastasios E. Germenis, Rafael Filippelli-Silva, Diego A. Duarte, Renan P. Martin, Camila L. Veronez, Michel Bouvier, Michael Bader, Claudio M. Costa-Neto, João Bosco Pesquero, Xavier Charest-Morin, François Marceau, Georges-É. Rivard, Arnaud Bonnefoy, Éric Wagner, Márta L. Debreczeni, Zsuzsanna Németh, Erika Kajdácsi, Endre Schwaner, László Cervenak, Gábor Oroszlán, András Szilágyi, Ráhel Dani, Péter Závodszky, Péter Gál, József Dobó, Jacques Hébert, Matthieu Vincent, Jean-Nicolas Boursiquot, Hugo Chapdeleine, Marylin Desjardins, Benoit Laramée, Rémi Gagnon, Nancy Payette, Oleksandra Lepeshkina, Delphine Charignon, Arije Ghannam, Denise Ponard, Christian Drouet, Kusumam Joseph, Baby G. Tholanikunnel, Daniel J. Sexton, Allen P. Kaplan, Stefania Loffredo, Maria Bova, Anne Lise Ferrara, Angelica Petraroli, Chiara Suffritti, Nóra Veszeli, Andrea Zanichelli, Henriette Farkas, Gianni Marone, Samuel Luyasu, Bertrand Favier, Ludovic Martin, Kinga Viktória Kőhalmi, György Temesszentandrási, Katalin Várnai, Lilian Varga, Bruce L. Zuraw, Annette Feussner, Michael A. Tortorici, Dipti Pawaskar, Huamin Henry Li, John Anderson, Jonathan A. Bernstein, Ying Zhang, Ingo Pragst, on behalf of COMPACT investigators, Emel Aygören-Pürsün, Kraig Jacobson, Jim Christensen, Arthur Van Leerberghe, Yi Wang, Jennifer Schranz, Inmaculada Martinez-Saguer, Daniel Soteres, Urs Steiner, Vesna Grivcheva Panovska, William Rae, Werner Aberer, Aarnoud Huissoon, Anette Bygum, Markus Magerl, Jochen Graff, Hilary Longhurst, Ramón Lleonart, Lei Fang, Melanie Cornpropst, Desiree Clemons, Amanda Mathis, Phil Collis, Sylvia Dobo, William P. Sheridan, Marcus Maurer, Marc A. Riedl, Timothy Craig, Aleena Banerji, Mustafa Shennak, William Yang, Jovanna Baptista, Paula Busse, Ira Kalfus, Andrew McDonald, Shawn Qian, Anthony Roberts, Con Panousis, Tim Green, Andreas Gille, Maria Zamanakou, Gedeon Loules, Dorottya Csuka, Fotis Psarros, Faidra Parsopoulou, Matthaios Speletas, Davide Firinu, Tiziana Maria Angela De Pasquale, Alessandra Zoli, Anna Radice, Stefano Pizzimenti, Emmanouil Manoussakis, George N. Konstantinou, Valeria Bafunno, Vincenzo Montinaro, Mauro Cancian, Maurizio Margaglione, Konrad Bork, Karin Wulff, Guenther Witzke, Jochen Hardt, Laurence Bouillet, Teresa Caballero, Anete S. Grumach, Christelle Pommie, Irmgard Andresen, Carmen Escuriola Ettingshausen, Zeynep Gutowski, Karin Andritschke, Richard Linde, Noémi Andrási, Tamás Szilágyi, Iris Leibovich-Nassi, Christine Symons, John Dempster, Isabelle Boccon-Gibod, Anne Pagnier, Audrey Lehmann, Kristian B. Kreiberg, Sandra A. Nieto, Raquel Martins, Renata Martins, Alejandra Menendez, Solange O. R. Valle, Margarita Olivares, Maria E. Hernandez-Landeros, Elma Nievas, Natalia Fili, Olga M. Barrera, René Bailleau, Ana Maria Gallardo-Olivos, Masumi Grau, Julian Rodriguez-Galindo, Marlon J. O. Carabantes, Edison Zapata-Venegas, Mario Martinez Alfonso, Maria Rosario-Grauert, Manuel Ratti, Daniel Vaszquez, Dario Josviack, Luis Fernando Landivar-Salinas, Oscar M. E. Calderón-Llosa, Rolando Campilay-Sarmiento, Pablo Raby, Jose Fabiani, William R. Lumry, Henrike Feuersenger, Douglas J. Watson, Thomas Machnig, on behalf of the Investigators of the COMPACT study, Donatella Lamacchia, Adriana Hernanz, Ana Alvez, Mariana Lluncor, Maria Pedrosa, Rosario Cabañas, Nieves Prior, Patrik Nordenfelt, Mats Nilsson, Anders Lindfors, Carl-Fredrik Wahlgren, Janne Björkander, Roman Hakl, Pavel Kuklínek, Irena Krčmová, Jana Hanzlíková, Martina Vachová, Radana Zachová, Marta Sobotková, Jana Strenková, Jiří Litzman, Maria Palasopoulou, Gerasimina Tsinti, Panagiota Gianni, Maria Kompoti, Sofia Garrido, Wojciech Dyga, Anna Bogdali, Aleksander Obtułowicz, Mikolajczyk Tomasz, Ewa Czarnobilska, Krystyna Obtulowicz, Teofila Książek, Anna Koncz, Dominik Gulyás, Maria Staevska, Milos Jesenak, Katarina Hrubiskova, L. Bellizzi, A. Relan, Maddalena A. Wu, Antonio Castelli, Riccardo Colombo, Gianmarco Podda, Marta Del Medico, Emanuele Catena, Francesco Casella, Francesca Perego, Nada Afifi Afifi, Eleonora Tobaldini, Nicola Montano, for the IOS Study Group, Marta Sánchez-Jareño, Marcin Stobiecki, Krystyna Obtułowicz, Irina Guryanova, Ekaterina Polyakova, Viktar Lebedz, Andrej Salivonchik, Svetlana Aleshkevich, Mikhail Belevtsev, Melanie Nordmann-Kleiner, Susanne Trainotti, Janina Hahn, Jens Greve, Liudmyla Zabrodska, Maria L. Oliva Alonso, Rosangela P. Tórtora, Alfeu T. França, Marcia G. Ribeiro, Lisa Fu, Amin Kanani, Gina Lacuesta, Susan Waserman, Stephen Betschel, Melissa I. Espinosa, Francisco A. Contreras, Martin Hrubisko, Ludmila Vavrova, Peter Banovcin, Maryam Ayazi, Mohammad Reza Fazlollahi, Shiva Saghafi, Sajedeh Mohammadian, Susan Nabilou Deshiry, Kiana Bidad, Raheleh Shokouhi Shoormasti, Iraj Mohammadzadeh, Mohammad Hassan Bemanian, Seyed Alireza Mahdaviani, Zahra Pourpak, Anna Valerieva, Mariela Vasileva, Tsvetelina Velikova, Elena Petkova, Vasil Dimitrov, Ruggero Di Maulo, on behalf of participating centers, Raz Somech, Hava Golander, Erika J. Sifuentes, Catherine Mansard, Anne Gompel, Bernard Floccard, Claire Blanchard-Delaunay, David Launay, Olivier Fain, Alain Sobel, Stéphane Gayet, Stéphanie Amarger, Guillaume Armengol, Yann Ollivier, Ariane Zélinsky-Gurung, Pierre-Yves Jeandel, Gisèle Kanny, Brigitte Coppéré, Marie Dubrel, Fabien Pelletier, Aurélie Du Thanh, Sébastien Trouiller, Jérôme Laurent, Claire De Moreuil, Christine Audouin Pajot, Alexandre Belot, Ana Rodríguez, Dasha Roa, Alicia Prieto, Maria Luisa Baeza, Borislava Krusheva, Stephanie K. A. Almeida, Rosemeire N. Constantino-Silva, Nyla Melo, Joanna Araujo Simoes, Sandra Mitie U. Palma, Jane da Silva, Bruna F. de Azevedo, Eli Mansour, Teresa González-Quevedo, Carmen Marcos, Teófilo Lobera, Blanca Sáenz de San Pedro, Ernie Avilla, Jacquie Badiou, Karen Binkley, Rozita Borici-Mazi, Linda Howlett, Paul K. Keith, Anne Rowe, Peter Waite, Aurore Billebeau, Isabelle Boccon-Gibbod, Kristina Lis, Yael Laitman, Eitan Friedman, N. M. Gokmen, O. Gulbahar, H. Onay, Z. P. Koc, and A. Z. Sin

Subjects
Immunologic diseases. Allergy, RC581-607
Published
2017
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2. Impact of Test Conditions on ADP-Induced Platelet Function Results With the Multiplate Assay: Is Further Standardization Required?

Author

Judit Skopál, József Faluközy, Katalin Várnai, Döme A. Dézsi, Béla Merkely, Daniel Aradi, Gábor Veress, Nasri Alotti, and Eszter Barabás

Subjects
Blood Platelets, Male, Time Factors, Platelet Function Tests, 030204 cardiovascular system & hematology, Specimen Handling, Platelet reactivity, Therapy naive, Andrology, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Drug Stability, Predictive Value of Tests, Humans, Medicine, Pharmacology (medical), Platelet, Prospective Studies, 030212 general & internal medicine, Enoxaparin, Aged, Pharmacology, business.industry, Anticoagulants, Reproducibility of Results, Blood collection, Middle Aged, Clopidogrel, Adenosine Diphosphate, Adenosine diphosphate, chemistry, Immunology, Purinergic P2Y Receptor Antagonists, Female, Purinergic P2Y Receptor Agonists, Sample collection, Drug Monitoring, Cardiology and Cardiovascular Medicine, business, Platelet Aggregation Inhibitors
Abstract

BACKGROUND Platelet function testing was suggested to help tailor P2Y12-inhibitor therapy; however, the lack of proper standardization is still a limitation. METHODS In a prospective study, we enrolled clopidogrel-treated and P2Y12-inhibitor naive patients to investigate the influence of (1) time from blood collection, (2) stability of the stored Adenosine diphosphate (ADP) reagent, and (3) the use of enoxaparin on results of the Multiplate assay. Measurements were performed from samples kept for 0, 30, 60, 120, and 240 minutes at room temperature before processing. To determine the impact of the reagent stability, freshly thawed ADP was compared with ADP kept for 3 to 5 or 8 to 13 days at 2°C to 8°C. Finally, samples containing enoxaparin at therapeutic or prophylactic doses were compared with enoxaparin-free blood. RESULTS A total of 180 measurements were performed. ADP-stimulated platelet reactivity values decreased significantly over time (67 ± 40 U to 68 ± 37 U to 58 ± 37 U to 45 ± 33 U to 35 ± 33 U; P < .0001). Consequently, a dramatic reduction was observed in the proportion of patients with high platelet reactivity ( P < .0001). A significant drop in platelet reactivity was observed with ADP stored for 8 to 13 days as compared to freshly thawed ADP ( P = .011). Enoxaparin triggered a slight, concentration-dependent increase in platelet reactivity ( P < .05). CONCLUSION Test conditions may have profound impacts on the obtained results with the Multiplate assay. Our findings highlight the large influence of the time from sample collection until testing, suggesting that measurements should be performed within an hour of blood collection.

Published
2017
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3. Risk of thromboembolism in patients with hereditary angioedema treated with plasma-derived C1-inhibitor

Author

Nóra Veszeli, Henriette Farkas, Katalin Várnai, Lilian Varga, Kinga Viktória Kőhalmi, and Zsuzsanna Zotter

Subjects
Adult, Male, Risk, Pulmonary and Respiratory Medicine, medicine.medical_specialty, Time Factors, Adolescent, medicine.medical_treatment, C1-inhibitor, Young Adult, 03 medical and health sciences, 0302 clinical medicine, Thromboembolism, Internal medicine, medicine, Humans, Immunology and Allergy, heterocyclic compounds, Child, Aged, Retrospective Studies, Aged, 80 and over, Danazol, 030219 obstetrics & reproductive medicine, biology, business.industry, Incidence, Incidence (epidemiology), Angioedemas, Hereditary, Retrospective cohort study, General Medicine, Middle Aged, biochemical phenomena, metabolism, and nutrition, respiratory system, bacterial infections and mycoses, medicine.disease, respiratory tract diseases, 030228 respiratory system, Child, Preschool, Health Care Surveys, Hereditary angioedema, biology.protein, Female, business, Complement C1 Inhibitor Protein, Central venous catheter, Tranexamic acid, Cohort study, medicine.drug
Abstract

BACKGROUND Plasma-derived C1-inhibitor (C1-INH) concentrates (pdC1-INH) have been used as safe and effective treatments for hereditary angioedema with C1-INH deficiency (C1-INH-HAE) for >30 years. Notwithstanding this, sporadic reports and a study into the high-dose therapy of neonates with C1-INH concentrate administered in an off-label indication raised concerns that this drug might increase the risk of thromboembolism. OBJECTIVE To investigate the incidence of thromboembolism and the background of the risk factors related to treatment with pdC1-INH. METHODS Our retrospective cohort study of 144 patients with C1-INH-HAE compared the incidence of thromboembolism and its risk factors in patients who received pdC1-INH with those who did not receive pdC1-INH as well as with those treated with danazol or with tranexamic acid. RESULTS During the observation period (29 years), 104 of the 144 subjects received pdC1-INH. The average dose per treatment was 573.59 IU. None of the patients used an indwelling central venous catheter. Multiple risk factors for thromboembolism were identified in 93 of the 104 patients treated with pdC1-INH. The incidence rate of thromboembolism was 0.0019/100 person-years in patients treated with pdC1-INH, whereas it was 0.0211/100 person-years in the not-treated group. CONCLUSION Our cohort study did not find any evidence for an increased risk of thromboembolism during treatment with pdC1-INH, despite the presence of multiple predisposing factors.

Published
2016
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4. Abstracts from the 10th C1-inhibitor deficiency workshop

Author

Mikhail Belevtsev, Jens Greve, Pierre-Yves Jeandel, Ana Maria Gallardo-Olivos, William R. Lumry, Yael Laitman, Marc A. Riedl, Jean-Nicolas Boursiquot, Dasha Roa, Péter Závodszky, Kraig Jacobson, Susanne Trainotti, Maria Staevska, Márcia Gonçalves Ribeiro, Zeynep Gutowski, François Marceau, Alejandra Menendez, Eric Wagner, Y. Ollivier, Alvin H. Schmaier, Rolando Campilay-Sarmiento, Amin S. Kanani, Valeria Bafunno, Christine Symons, Svetlana Aleshkevich, Stephanie K. A. Almeida, Kusumam Joseph, Teresa Caballero, Hava Golander, Nancy J. Brown, Xavier Charest-Morin, Peter Banovcin, Arnaud Bonnefoy, Sajedeh Mohammadian, Mustafa Shennak, William P. Sheridan, Ira Kalfus, Claudio M. Costa-Neto, Rafael Filippelli-Silva, Anete Sevciovic Grumach, Solange Oliveira Rodrigues Valle, Oscar M. E. Calderón-Llosa, Panagiota Gianni, Emel Aygören-Pürsün, Rosemeire Navickas Constantino-Silva, Zsuzsanna Németh, Irmgard Andresen, Konrad Bork, Mauro Cancian, Claire de Moreuil, Janne Björkander, Melissa I. Espinosa, Tamás Szilágyi, Maria Rosario-Grauert, Jane da Silva, Michael Bader, Ying Zhang, Jana Hanzlíková, Sylvia Dobo, Carl-Fredrik Wahlgren, Jacquie Badiou, Diego A. Duarte, Marta Del Medico, Stefania Loffredo, Avner Reshef, Maria Palasopoulou, Ludmila Vavrova, Marie Dubrel, Raheleh Shokouhi Shoormasti, Bruce L. Zuraw, Susan Nabilou Deshiry, Shiva Saghafi, Ekaterina Polyakova, Matthieu Vincent, Douglas J. Watson, Mohammad Reza Fazlollahi, Anne Rowe, Shawn Qian, Blanca Sáenz de San Pedro, Christelle Pommie, Sofía Garrido, Sandra Mitie Ueda Palma, András Szilágyi, Luis Fernando Landivar-Salinas, Audrey Lehmann, Maria L. Baeza, Kiana Bidad, Hugo Chapdeleine, Stéphane Gayet, Davide Firinu, Nancy Payette, Christine Pajot, Nyla Melo, Pavel Kuklínek, Pablo Raby, Nóra Veszeli, Ingo Pragst, Desiree Clemons, Anne Pagnier, Attila Mócsai, Carmen Escuriola Ettingshausen, Henrike Feuersenger, Noémi Andrási, Paul K. Keith, Phil Collis, Ernie Avilla, Olivier Fain, Iris Leibovich-Nassi, Dario O. Josviack, Jiří Litzman, Con Panousis, Denise Ponard, Sébastien Trouiller, Ráhel Dani, Francesco Casella, Ana Rodríguez, Isabelle Boccon-Gibod, Nada Afifi Afifi, Olga M. Barrera, Gina Lacuesta, Gian Marco Podda, Anne Lise Ferrara, Samuel Luyasu, Ludovic Martin, Patrik Nordenfelt, Linda Howlett, William H. Yang, Sandra A. Nieto, Anders Lindfors, Zahra Pourpak, Stéphanie Amarger, Adriana Hernanz, Jochen Hardt, Julian Rodriguez-Galindo, Claire Blanchard-Delaunay, Antonio Castelli, Marta Sánchez-Jareño, Renata Martins, Bertrand Favier, Yi Wang, Rosario Cabañas, Anthony Roberts, Renan Paulo Martin, Alexandre Belot, Vincenzo Montinaro, Eitan Friedman, João Bosco Pesquero, Maria Kompoti, Bruna Franca Azevedo, Mikolajczyk Tomasz, Georges-É. Rivard, Katalin Várnai, Gábor Oroszlán, Arije Ghannam, David Launay, Fotis Psarros, Manuel Ratti, Maria Luiza Oliva Alonso, Bernard Floccard, Mariana Lluncor, Karen Binkley, Gianni Marone, Anne Gompel, Dominik Gulyás, John Dempster, Liudmyla Zabrodska, Emanuele Catena, Anna Bogdali, Irina Guryanova, Andrej Salivonchik, Camila Lopes Veronez, L. Fang, Eleonora Tobaldini, Lilian Varga, Chiara Suffritti, Daniel Vaszquez, Peter Waite, Maria Zamanakou, Ana Alvez, Laurence Bouillet, Péter Gál, Susan Waserman, Krystyna Obtułowicz, Marcin Stobiecki, Alain Sobel, Karin Wulff, A. Z. Sin, Margarita Olivares, Dipti Pawaskar, Mats Nilsson, Endre Schwaner, Brigitte Coppere, Anna Valerieva, Remi Gagnon, Marlon J. O. Carabantes, Stefano Pizzimenti, H. Onay, Paula J. Busse, Delphine Charignon, William Rae, Marco Cicardi, Kinga Viktória Kőhalmi, Inmaculada Martinez-Saguer, Daniel J. Sexton, Matthaios Speletas, Aarnoud Huissoon, René Bailleau, Fabien Pelletier, Elena Petkova, Joanna Araujo Simoes, Guillaume Armengol, Amanda Mathis, Rosangela P. Tortora, Raz Somech, Andreas Gille, Anastasios E. Germenis, Martin Hrubisko, Marylin Desjardins, Dorottya Csuka, María Pedrosa, Jose Fabiani, Stephen Betschel, Timothy J. Craig, Vasil Dimitrov, Andrew McDonald, Alberto López Lera, Márta L. Debreczeni, Eli Mansour, Teofila Książek, Teófilo Lobera, Rozita Borici-Mazi, O. Gulbahar, Aleena Banerji, Jochen Graff, Marta Sobotkova, Annette Feussner, Andrea Zanichelli, Ewa Czarnobilska, Anna Koncz, Milos Jesenak, Edison Zapata-Venegas, Aurore Billebeau, Gedeon Loules, Melanie Nordmann-Kleiner, Werner Aberer, Richard Linde, Guenther Witzke, Kristina Lis, Markus Magerl, Jana Strenková, Emmanouil Manoussakis, József Dobó, Viktar Lebedz, Masumi Grau, Raquel Martins, Melanie Cornpropst, Jovanna Baptista, Marcus Maurer, Dumitru Moldovan, György Temesszentandrási, Isabelle Boccon-Gibbod, Thomas Machnig, C Marcos, Erika Kajdácsi, Tim Green, John Anderson, Karin Andritschke, D. Soteres, Riccardo Colombo, Mario Martinez Alfonso, Anna Radice, Huamin Henry Li, Tsvetelina Velikova, Ruggero Di Maulo, Mariela Borisova Vasileva, Angelica Petraroli, Francesca Perego, Francisco A. Contreras, Roman Hakl, Urs C. Steiner, Anurag Relan, N. Prior, Irena Krčmová, Jennifer Schranz, Martina Vachová, Baby G. Tholanikunnel, R. Lleonart, Maria Bova, Allen P. Kaplan, N. M. Gokmen, Nicola Montano, Margarita López-Trascasa, Tiziana Maria Angela De Pasquale, Alicia Prieto, Kristian Buur Kreiberg, Mohammad Hassan Bemanian, Alessandra Zoli, Michael A. Tortorici, Erika J. Sifuentes, László Cervenak, Borislava Krusheva, Maria E. Hernandez-Landeros, Wojciech Dyga, Oleksandra Lepeshkina, Elma Nievas, L. Bellizzi, Christian Drouet, C. Mansard, Michel Bouvier, Aurélie Du Thanh, Donatella Lamacchia, Janina Hahn, Radana Zachova, Iraj Mohammadzadeh, T González-Quevedo, Z. P. Koc, Jacques Hébert, Hilary Longhurst, Maddalena Alessandra Wu, Ariane Zélinsky-Gurung, Jim Christensen, Maurizio Margaglione, Maryam Ayazi, Vesna Grivcheva Panovska, Faidra Parsopoulou, Jonathan A. Bernstein, Anette Bygum, Seyed Alireza Mahdaviani, Henriette Farkas, Aleksander Obtułowicz, Natalia Fili, Gisèle Kanny, Gerasimina Tsinti, Alfeu Tavares França, George N. Konstantinou, Benoit Laramée, Katarina Hrubiskova, Lisa Fu, J. Laurent, and Arthur Van Leerberghe

Subjects
lcsh:Immunologic diseases. Allergy, 0301 basic medicine, 03 medical and health sciences, 030102 biochemistry & molecular biology, C1 inhibitor deficiency, business.industry, Immunology, Medicine, General Medicine, lcsh:RC581-607, business, Meeting Abstracts
Published
2017
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5. Improved circulating microparticle analysis in acid-citrate dextrose (ACD) anticoagulant tube

Author

Bence György, Gabriella Bekő, Eszter Barabás, Katalin Várnai, Tamás Szabó, András Falus, Éva Pállinger, Krisztina Pálóczi, Alexandra Kovács, Katalin Szabó-Taylor, Attila András Kiss, and Edit I. Buzás

Subjects
Adult, Blood Platelets, Male, Adolescent, Pharmacology, Exosomes, Citric Acid, Acid-citrate-dextrose, 03 medical and health sciences, Young Adult, 0302 clinical medicine, In vivo, Cell-Derived Microparticles, Blood plasma, Humans, Platelet, Microparticle, 030304 developmental biology, 0303 health sciences, Chemistry, Anticoagulants, Hematology, Extracellular vesicle, Middle Aged, Flow Cytometry, In vitro, Microvesicles, Glucose, Biochemistry, 030220 oncology & carcinogenesis, Female
Abstract

Introduction Recently extracellular vesicles (exosomes, microparticles also referred to as microvesicles and apoptotic bodies) have attracted substantial interest as potential biomarkers and therapeutic vehicles. However, analysis of microparticles in biological fluids is confounded by many factors such as the activation of cells in the blood collection tube that leads to in vitro vesiculation. In this study we aimed at identifying an anticoagulant that prevents in vitro vesiculation in blood plasma samples. Materials and Methods We compared the levels of platelet microparticles and non-platelet-derived microparticles in platelet-free plasma samples of healthy donors. Platelet-free plasma samples were isolated using different anticoagulant tubes, and were analyzed by flow cytometry and Zymuphen assay. The extent of in vitro vesiculation was compared in citrate and acid-citrate-dextrose (ACD) tubes. Results Agitation and storage of blood samples at 37 °C for 1 hour induced a strong release of both platelet microparticles and non-platelet-derived microparticles. Strikingly, in vitro vesiculation related to blood sample handling and storage was prevented in samples in ACD tubes. Importantly, microparticle levels elevated in vivo remained detectable in ACD tubes. Conclusions We propose the general use of the ACD tube instead of other conventional anticoagulant tubes for the assessment of plasma microparticles since it gives a more realistic picture of the in vivo levels of circulating microparticles and does not interfere with downstream protein or RNA analyses.

Published
2013

6. Novel duplication in the F12 gene in a patient with recurrent angioedema

Author

Henriette Farkas, Zoltán Prohászka, Ágnes Szilágyi, Katalin Várnai, Lilian Varga, Nóra Zsuzsa Kiss, Eszter Barabás, and Adrien Halász

Subjects
Adult, medicine.medical_specialty, Immunology, Bradykinin, Coagulation Factor XII, Gene mutation, medicine.disease_cause, chemistry.chemical_compound, Recurrence, Internal medicine, Gene duplication, medicine, Immunology and Allergy, Humans, cardiovascular diseases, Angioedema, Factor XII, Mutation, business.industry, Complement C4, medicine.disease, Endocrinology, chemistry, Hereditary angioedema, Female, medicine.symptom, business, Complement C1 Inhibitor Protein
Abstract

Edema formation is mediated by histamine or bradykinin release and may have several hereditary and acquired causes. In hereditary forms of bradykinin-mediated angioedemas, mutations in the genes encoding C1-inhibitor (SERPING1) as well as coagulation factor XII (F12) have been described. We present a novel F12 gene mutation, a duplication of 18 base pairs (c.892_909dup) in a 37-year-old woman with recurrent angioedema and normal C1-inhibitor level. A single episode of facial edema in the family of the patient showed co-segregation with the mutation. This duplication is causing the repeated presence of 6 amino acids (p.298-303) in the same region of factor XII, as those three mutations described previously in cases of hereditary angioedema with normal C1-INH function. These results may confirm the importance of the proline-rich region of factor XII protein in edema formation.

Published
2013

7. Plasma-Derived C1 Inhibitor Concentrate Did Not Increase the Risk of Thromboembolism in Patients with Hereditary Angioedema Due to C1-Inhibitor Deficiency – a Long-Term Survey

Author

Henriette Farkas, Zsuzsanna Zotter, Nóra Veszeli, Katalin Várnai, Lilian Varga, and Kinga Viktoria Kohalmi

Subjects
medicine.medical_specialty, C1 inhibitor deficiency, biology, business.industry, Plasma derived, Immunology, medicine.disease, Gastroenterology, Surgery, C1-inhibitor, Internal medicine, Hereditary angioedema, medicine, biology.protein, Immunology and Allergy, In patient, business
Published
2015
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