Expression of adhesion molecules on myeloma cells.
We investigated the expression of adhesion molecules including LFA-1 alpha (CD11a), Mac-1 (CD11b), LFA-1 beta (CD18), VLA-beta 1 (CD29), H-CAM (CD44), VLA-4 (CD49d), VLA-5 (CD49e), ICAM-1 (CD54), N-CAM (CD56), LFA-3 (CD58), VNR-beta (CD61), and LECAM-1 (CD62L) on fresh myeloma cells and human myeloma cell lines. By two-color flow cytometric analysis with anti-CD38 antibody, we demonstrated that myeloma cells were located in the strongly CD38-positive (CD38++) fractions. Fresh myeloma cells were obtained from 28 patients with multiple myeloma (MM) and 3 patients with plasma cell leukemia (PCL). All myeloma cells expressed VLA-4 on their surface. Most of the myeloma cells also expressed VLA-5, ICAM-1, and LFA-3, H-CAM was strongly expressed in 3 cases of PCL and 2 cases of aggressive myeloma, and moderately expressed in other MMs. N-CAM was expressed in 68% of MMs, but none of the 3 PCLs. LFA-1 was expressed in two cases of aggressive myeloma, but not expressed in other non-aggressive myelomas. Most of the myeloma cells did not express Mac-1, VNR-beta, or LECAM-1. These results suggest that VLA-4, VLA-5, ICAM-1, LFA-3, and H-CAM are involved in cellular interaction and migration in MM, and that the expression of N-CAM and LFA-1 varies with disease activity in MM.
Tatsumi
T
T
Second Department of Medicine, Kyoto Prefectural University of Medicine.
Shimazaki
C
C
Goto
H
H
Araki
S
S
Sudo
Y
Y
Yamagata
N
N
Ashihara
E
E
Inaba
T
T
Fujita
N
N
Nakagawa
M
M
D036541:ADP-ribosyl Cyclase; D051997:ADP-ribosyl Cyclase 1; D015703:Antigens, CD; D000943:Antigens, Differentiation / Q000032:analysis; D018968:CD58 Antigens / Q000032:analysis; D015815:Cell Adhesion Molecules / Q000032:analysis*; D005434:Flow Cytometry; D006801:Humans; D018960:Hyaluronan Receptors / Q000032:analysis; D039041:Integrin alpha4beta1; D016023:Integrins / Q000032:analysis; D018799:Intercellular Adhesion Molecule-1 / Q000032:analysis; D008562:Membrane Glycoproteins; D009101:Multiple Myeloma / Q000378:metabolism*; D009699:N-Glycosyl Hydrolases / Q000032:analysis; D017469:Receptors, Fibronectin / Q000032:analysis; D016201:Receptors, Lymphocyte Homing / Q000032:analysis; D014407:Tumor Cells, Cultured
D015703:Antigens, CD; D000943:Antigens, Differentiation; D018968:CD58 Antigens; D015815:Cell Adhesion Molecules; D018960:Hyaluronan Receptors; D039041:Integrin alpha4beta1; D016023:Integrins; D008562:Membrane Glycoproteins; D017469:Receptors, Fibronectin; D016201:Receptors, Lymphocyte Homing; D018799:Intercellular Adhesion Molecule-1; D009699:N-Glycosyl Hydrolases; D036541:ADP-ribosyl Cyclase; C498154:CD38 protein, human; D051997:ADP-ribosyl Cyclase 1