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Dadun > Depósito Académico > CIMA (Centro de Investigación Médica Aplicada) > Área de Oncología > Oncología molecular > DA - CIMA - Oncología - Oncología molecular - Artículos de Revista >

Lymphoma stem cells: enough evidence to support their existence?
Authors: Martinez-Climent, J.A. (José Angel)
Fontan, L. (Lorena)
Gascoyne, R.D (R. D.)
Siebert, R. (Reiner)
Prosper, F. (Felipe)
Keywords: Cancer stem cells
B-cell non-Hodgkin’s lymphoma
Lymphoma-initiating cells
Lymphoma-originating cells
Lymphoid plasticity
Issue Date: 2010
Publisher: Pensiero Scientifico / Ferrata Storti Foundation
Publisher version: http://www.haematologica.org/cgi/content/abstract/95/2/293
ISSN: 0390-6078
Citation: Martínez-Climent J. A., Fontan L., Gascoyne R. D., Siebert R. et al... Lymphoma stem cells: enough evidence to support their existence? Haematologica 2010; 95(2): 293-302.
Abstract
While leukemia-originating stem cells are critical in the initiation and maintenance of leukemias, the existence of similar cell populations that may generate B-cell lymphoma upon mutation remains uncertain. Here we propose that committed lymphoid progenitor/precursor cells with an active V-D-J recombination program are the initiating cells of follicular lymphoma and mantle cell lymphoma when targeted by immunoglobulin (IG)- gene translocations in the bone marrow. However, these pre-malignant lymphoma-initiating cells cannot drive complete malignant transformation, requiring additional cooperating mutations in specific stem-cell programs to be converted into the lymphoma-originating cells able to generate and sustain lymphoma development. Conversely, diffuse large B-cell lymphoma and sporadic Burkitt’s lymphoma derive from B lymphocytes that acquire translocations through IG-hyper-mutation or class-switching errors within the germinal center. Although secondary reprogramming mutations are generally required, some cells such as centroblasts or memory B cells that have certain stem cell-like features, or lymphocytes with MYC rearrangements that deregulate self-renewal pathways, may bypass this need and directly function as the lymphoma-originating cells. An alternative model supports an aberrant epigenetic modification of gene sets as the first occurring hit, which either leads to retaining stem-cell features in hematopoietic stem or progenitor cells, or reprograms stemness into more committed lymphocytes, followed by secondary chromosomal translocations that eventually drive lymphoma development. Isolation and characterization of the cells that are at the origin of the different B-cell non-Hodgkin’s lymphomas will provide critical insights into the disease pathogenesis and will represent a step towards the development of more effective therapies.
Permanent link: http://hdl.handle.net/10171/17885
Appears in Collections:DA - CIMA - Oncología - Síndromes mieloproliferativos - Artículos de Revista
DA - CIMA - Oncología - Terapia celular - Artículos de Revista
DA - CIMA - Oncología - Oncología molecular - Artículos de Revista
DA - CUN - Área de Terapia Celular - Artículos de revista
DA - Medicina - Hematología - Artículos de revista

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