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Consistent B Cell Receptor Immunoglobulin Features Between Siblings in Familial Chronic Lymphocytic Leukemia
PM. Kolijn, AF. Muggen, V. Ljungström, A. Agathangelidis, ILM. Wolvers-Tettero, HB. Beverloo, K. Pál, PJ. Hengeveld, N. Darzentas, RW. Hendriks, JJM. van Dongen, R. Rosenquist, AW. Langerak
Jazyk angličtina Země Švýcarsko
Typ dokumentu časopisecké články
Free Medical Journals od 2011
PubMed Central od 2011
Europe PubMed Central od 2011
Open Access Digital Library od 2011-01-01
Open Access Digital Library od 2011-01-01
ROAD: Directory of Open Access Scholarly Resources od 2011
Odkazy
PubMed
34513715
DOI
10.3389/fonc.2021.740083
Knihovny.cz E-zdroje
- Publikační typ
- časopisecké články MeSH
Key processes in the onset and evolution of chronic lymphocytic leukemia (CLL) are thought to include chronic (antigenic) activation of mature B cells through the B cell receptor (BcR), signals from the microenvironment, and acquisition of genetic alterations. Here we describe three families in which two or more siblings were affected by CLL. We investigated whether there are immunogenetic similarities in the leukemia-specific immunoglobulin heavy (IGH) and light (IGL/IGK) chain gene rearrangements of the siblings in each family. Furthermore, we performed array analysis to study if similarities in CLL-associated chromosomal aberrations are present within each family and screened for somatic mutations using paired tumor/normal whole-genome sequencing (WGS). In two families a consistent IGHV gene mutational status (one IGHV-unmutated, one IGHV-mutated) was observed. Intriguingly, the third family with four affected siblings was characterized by usage of the lambda IGLV3-21 gene, with the hallmark R110 mutation of the recently described clinically aggressive IGLV3-21R110 subset. In this family, the CLL-specific rearrangements in two siblings could be assigned to either stereotyped subset #2 or the immunogenetically related subset #169, both of which belong to the broader IGLV3-21R110 subgroup. Consistent patterns of cytogenetic aberrations were encountered in all three families. Furthermore, the CLL clones carried somatic mutations previously associated with IGHV mutational status, cytogenetic aberrations and stereotyped subsets, respectively. From these findings, we conclude that similarities in immunogenetic characteristics in familial CLL, in combination with genetic aberrations acquired, point towards shared underlying mechanisms behind CLL development within each family.
CEITEC Central European Institute of Technology Masaryk University Brno Czechia
Department of Biology School of Science National and Kapodistrian University of Athens Athens Greece
Department of Clinical Genetics Erasmus MC University Medical Center Rotterdam Netherlands
Department of Hematology University Hospital Schleswig Holstein Kiel Germany
Department of Immunology LUMC Leiden Netherlands
Department of Molecular Medicine and Surgery Karolinska Institutet Stockholm Sweden
Department of Pulmonary Medicine Erasmus MC University Medical Center Rotterdam Netherlands
Institute of Applied Biosciences Centre for Research and Technology Hellas Thessaloniki Greece
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- $a Key processes in the onset and evolution of chronic lymphocytic leukemia (CLL) are thought to include chronic (antigenic) activation of mature B cells through the B cell receptor (BcR), signals from the microenvironment, and acquisition of genetic alterations. Here we describe three families in which two or more siblings were affected by CLL. We investigated whether there are immunogenetic similarities in the leukemia-specific immunoglobulin heavy (IGH) and light (IGL/IGK) chain gene rearrangements of the siblings in each family. Furthermore, we performed array analysis to study if similarities in CLL-associated chromosomal aberrations are present within each family and screened for somatic mutations using paired tumor/normal whole-genome sequencing (WGS). In two families a consistent IGHV gene mutational status (one IGHV-unmutated, one IGHV-mutated) was observed. Intriguingly, the third family with four affected siblings was characterized by usage of the lambda IGLV3-21 gene, with the hallmark R110 mutation of the recently described clinically aggressive IGLV3-21R110 subset. In this family, the CLL-specific rearrangements in two siblings could be assigned to either stereotyped subset #2 or the immunogenetically related subset #169, both of which belong to the broader IGLV3-21R110 subgroup. Consistent patterns of cytogenetic aberrations were encountered in all three families. Furthermore, the CLL clones carried somatic mutations previously associated with IGHV mutational status, cytogenetic aberrations and stereotyped subsets, respectively. From these findings, we conclude that similarities in immunogenetic characteristics in familial CLL, in combination with genetic aberrations acquired, point towards shared underlying mechanisms behind CLL development within each family.
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