Identification of immature and mature myeloma cells in the bone marrow of human myelomas.
Blood
; 82(2): 564-70, 1993 Jul 15.
Article
en En
| MEDLINE
| ID: mdl-8329711
ABSTRACT
With regard to the expression of adhesion molecules, human myeloma cells freshly isolated from bone marrow were heterogeneous. By two-color analysis with anti-VLA-5 antibody (PE staining) and FITC-labeled anti-CD38 antibody, we found all myeloma cells located at CD38-strong positive (CD38++) fraction and identified two subpopulations among these myeloma cells CD38++ VLA-5-(VLA-5-) myeloma cells and CD38++ VLA-5+ (VLA-5+) myeloma cells. To clarify the biologic character of these two subpopulations, the morphology, in vitro proliferative activity and in vitro M-protein secretion were examined in each fraction isolated by the purification procedure or a cell sorter. Morphologic examination showed that VLA-5- myeloma cells were mostly immature or plasmablastic and VLA-5+ cells were mature myeloma cells. Furthermore, VLA-5- myeloma cells proliferated markedly in vitro and responded to interleukin 6 (IL-6), a growth factor for myeloma cells, while VLA-5+ myeloma cells showed very low uptakes of 3H-thymidine and no responses to IL-6 but secreted higher amounts of M-protein (immunoglobulin) in vitro significantly. Therefore, we could clarify here heterogeneity of human myeloma cells in the bone marrow with regard to the expression of VLA-5, one of integrin adhesion molecules; VLA-5- myeloma cells were proliferative immature cells and VLA-5+ cells were mature myeloma cells.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Médula Ósea
/
Mieloma Múltiple
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Blood
Año:
1993
Tipo del documento:
Article
País de afiliación:
Japón