Chemokine receptors that mediate B cell homing to secondary lymphoid tissues are highly expressed in B cell chronic lymphocytic leukemia and non-Hodgkin lymphomas with widespread nodular dissemination.
B cell neoplasms present heterogeneous patterns of lymphoid organ involvement, which may be a result of the differential expression of chemokine receptors. We found that chemokine receptor (CCR)7, CXC chemokine receptor (CXCR)4, or CXCR5, the main chemokine receptors that mediate B cell entry into secondary lymphoid tissues and their homing to T cell and B cell zones therein, were highly expressed in B malignancies with widespread involvement of lymph nodes. Conversely, those pathologies with little or no nodular dissemination showed no expression to very low levels of CCR7 and CXCR5 and low to moderate levels of CXCR4. These findings provide evidence for the role of CCR7, CXCR4, and CXCR5 in determining the pattern of lymphoid organ involvement of B tumors. Functional studies were performed on B malignancies expressing different levels of CCR7, CXCR5, and CXCR4. Multiple myeloma (MM) cells did not express CCR7 nor CXCR5 and did not migrate in response to their ligands; a moderate expression of CXCR4 on MM cells was accompanied by a migratory response to its ligand, CXCL12. By contrast, cells from B cell chronic lymphocytic leukemia (B-CLL) expressed the highest levels of these chemokine receptors and efficiently migrated in response to all ligands of CCR7, CXCR4, and CXCR5. In addition, the migration index of B-CLL cells in response to both of the CCR7 ligands correlated with the presence of clinical lymphadenopathy, thus indicating that the high expression of functional chemokine receptors justifies the widespread character of B-CLL, representing a clinical target for the control of tumor cell dissemination.
López-Giral
Sonia
S
Department of Immunology, Hospital Universitario de la Princesa, C/Diego de León, 62, 28006 Madrid, Spain.
Quintana
Nuria E
NE
Cabrerizo
María
M
Alfonso-Pérez
Manuel
M
Sala-Valdés
Mónica
M
De Soria
Valle Gómez Garcia
VG
Fernández-Rañada
José María
JM
Fernández-Ruiz
Elena
E
Muñoz
Cecilia
C
D036541:ADP-ribosyl Cyclase / Q000235:genetics; D051997:ADP-ribosyl Cyclase 1; D015703:Antigens, CD / Q000235:genetics; D001402:B-Lymphocytes / Q000502:physiology; D002465:Cell Movement / Q000502:physiology*; D002633:Chemotaxis / Q000502:physiology; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000235:genetics / Q000378:metabolism*; D008221:Lymphoid Tissue / Q000502:physiology; D008228:Lymphoma, Non-Hodgkin / Q000235:genetics / Q000378:metabolism*; D008562:Membrane Glycoproteins; D009154:Mutation; D054400:Receptors, CCR7; D019718:Receptors, CXCR4 / Q000378:metabolism; D054380:Receptors, CXCR5; D019707:Receptors, Chemokine / Q000378:metabolism*; D018121:Receptors, Cytokine / Q000378:metabolism
D015703:Antigens, CD; C515370:CCR7 protein, human; C095085:CXCR5 protein, human; D008562:Membrane Glycoproteins; D054400:Receptors, CCR7; D019718:Receptors, CXCR4; D054380:Receptors, CXCR5; D019707:Receptors, Chemokine; D018121:Receptors, Cytokine; D036541:ADP-ribosyl Cyclase; C498154:CD38 protein, human; D051997:ADP-ribosyl Cyclase 1