Disease-biased and shared characteristics of the immunoglobulin gene repertoires in marginal zone B cell lymphoproliferations

Aliki Xochelli, Vasilis Bikos, Eleftheria Polychronidou, Chrysi Galigalidou, Andreas Agathangelidis, Frédéric Charlotte, Panagiotis Moschonas, Zadie Davis, Monica Colombo, Maria Roumelioti, Lesley-Ann Sutton, Patricia Groenen, Michiel van den Brand, Myriam Boudjoghra, Patricia Algara, Alexandra Traverse-Glehen, Ana Ferrer, Evangelia Stalika, Maria Karypidou, George KanellisChristina Kalpadakis, Manuella Mollejo, Gerasimos Pangalis, Panayiotis Vlamos, Rose-Marie Amini, Sarka Pospisilova, David Gonzalez, Maurilio Ponzoni, Achilles Anagnostopoulos, Véronique Giudicelli, Marie-Paule Lefranc, Blanca Espinet, Panagiotis Panagiotidis, Miguel Angel Piris, Ming-Qing Du, Richard Rosenquist, Theodora Papadaki, Chrysoula Belessi, Manlio Ferrarini, David Oscier, Dimitrios Tzovaras, Paolo Ghia, Frederic Davi, Anastasia Hadzidimitriou, Kostas Stamatopoulos

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The B cell receptor immunoglobulin (BcR IG) gene repertoires of marginal zone (MZ) lymphoproliferations were analyzed in order to obtain insight into their ontogenetic relationships. Our cohort included cases with MZ lymphomas (n=488) i.e. splenic (SMZL), nodal (NMZL) and extranodal (ENMZL) as well as provisional entities (n=76) according to the World Health Organization classification. The most striking IG gene repertoire skewing was observed in SMZL. However, restrictions were also identified in all other MZ lymphomas studied, particularly ENMZL, with significantly different IG gene distributions depending on the primary site of involvement. Cross-entity comparisons of the MZ IG sequence dataset with a large dataset of IG sequences (MZ-related or not; n=65,837) revealed four major clusters of cases sharing homologous ('public') heavy variable complementarity-determining region 3. These clusters included rearrangements from SMZL, ENMZL (gastric, salivary gland, ocular adnexa), chronic lymphocytic leukemia but also rheumatoid factors and non-malignant spleen MZ cells. In conclusion, different MZ lymphomas display biased immunogenetic signatures indicating distinct antigen exposure histories. The existence of rare public stereotypes raises the intriguing possibility that common, pathogen-triggered, immune-mediated mechanisms, may result in diverse B lymphoproliferations due to targeting versatile progenitor B cells and/or operating in particular microenvironments.

Original languageEnglish
JournalJournal of Pathology
Early online date28 Nov 2018
Publication statusEarly online date - 28 Nov 2018

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