Related Experiment Video
Updated: May 1, 2026
Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma
Published on: March 30, 2018
Human t(14;18)positive germinal center B cells: a new step in follicular lymphoma pathogenesis?
Julie Tellier1, Cedric Menard2, Sandrine Roulland1
1Centre d'Immunologie Marseille-Luminy, Université Aix-Marseille, Marseille, France; INSERM, Unité Mixte de Recherche U1104, Marseille, France; Centre National pour la Recherche Scientifique, Unité Mixte de Recherche 7280, Marseille, France;
Follicular lymphoma (FL) is a B-cell neoplasm resulting from the transformation of germinal center (GC) B cells. Although t(14;18) and ectopic B-cell lymphoma 2 (BCL2) expression constitute the genetic hallmark of FL, t(14;18)(pos) B cells bearing genotypic and phenotypic features of FL cells can be found in the blood of most healthy individuals. Nevertheless, the localization of these FL-like cells (FLLCs) in nonmalignant GC-rich tissues and the functional consequences of BCL2 overexpression have not been evaluated thus far. Among 85 reactive lymph node (RLN) samples, 14% were found to contain high levels of t(14;18) by quantitative polymerase chain reaction. In t(14;18)(hi) RLNs, CD20(pos)BCL2(pos)CD10(pos) FLLCs consistently accumulated within the GC, essentially as nonproliferative CXCR4(neg) centrocytes. Moreover, they displayed a reduced response to proliferative stimuli in vitro. Altogether, our findings provide new insights into in situ FLLC functional properties and suggest that these cells have not acquired the ultimate genetic events leading to FL transformation.
Follicular lymphoma (FL) is a B-cell neoplasm resulting from the transformation of germinal center (GC) B cells. Although t(14;18) and ectopic B-cell lymphoma 2 (BCL2) expression constitute the genetic hallmark of FL, t(14;18)(pos) B cells bearing genotypic and phenotypic features of FL cells can be found in the blood of most healthy individuals. Nevertheless, the localization of these FL-like cells (FLLCs) in nonmalignant GC-rich tissues and the functional consequences of BCL2 overexpression have not been evaluated thus far. Among 85 reactive lymph node (RLN) samples, 14% were found to contain high levels of t(14;18) by quantitative polymerase chain reaction. In t(14;18)(hi) RLNs, CD20(pos)BCL2(pos)CD10(pos) FLLCs consistently accumulated within the GC, essentially as nonproliferative CXCR4(neg) centrocytes. Moreover, they displayed a reduced response to proliferative stimuli in vitro. Altogether, our findings provide new insights into in situ FLLC functional properties and suggest that these cells have not acquired the ultimate genetic events leading to FL transformation.
More Related Videos
07:07Evaluation of T Follicular Helper Cells and Germinal Center Response During Influenza A Virus Infection in Mice
Published on: June 27, 2020
07:39Isolation of CD4+ T-cells and Analysis of Circulating T-follicular Helper cTfh Cell Subsets from Peripheral Blood Using 6-color Flow Cytometry
Published on: January 7, 2019
Related Concept Videos
01:23Cells of the Adaptive Immune Response
01:24B Cell Activation and Differentiation
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
02:07Tumor Progression
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...