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1996-02-26
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Document 0651
DOCN M9620651
TI A B7-1-transfected human melanoma line stimulates proliferation and
cytotoxicity of autologous and allogeneic lymphocytes.
DT 9602
AU Sule-Suso J; Arienti F; Melani C; Colombo MP; Parmiani G; Division of
Experimental Oncology D, Istituto Nazionale Tumori,; Milan, Italy.
SO Eur J Immunol. 1995 Oct;25(10):2737-42. Unique Identifier : AIDSLINE
MED/96062018
AB B7 co-stimulation is necessary to activate resting T cells upon antigen
recognition by the T cell receptor. To see whether expression of B7 may
render human melanoma cells able to stimulate T cells, a cloned melanoma
line (Me1B6), which did not express B7-1, was transfected with the human
B7-1 gene. In proliferation assays, B7-1 transfected cells (Me1B6/B7)
showed greater stimulatory activity of allogeneic and autologous
peripheral blood lymphocytes (PBL) compared to parental, non-transfected
tumor cells. This effect was also seen when allogeneic CD8+ and CD4+
subpopulations were used as effectors. In these studies, activation of
lymphocytes was B7-1-dependent and HLA classes I and II mediated. The
higher proliferation correlated with an increased lytic activity by PBL
stimulated with B7-1+ tumor cells against the untransfected Me1B6.
Furthermore, PBL from a metastatic melanoma patient stimulated by
Me1B6/B7 developed an higher lytic activity not only against Me1B6 but
also against their autologous, B7-1- tumor. Finally, after Me1B6/B7
stimulation, PBL released interleukin (IL)-2 and interferon-gamma, but
not IL-4, suggesting a Th1-mediated response. These data support the use
of B7-1 transfected melanoma cells in the therapeutic vaccination of
melanoma patients.
DE Antigens, CD80/GENETICS/*PHYSIOLOGY Cell Division Cells, Cultured
Cytotoxicity Tests, Immunologic *Cytotoxicity, Immunologic Haplotypes
Human HLA Antigens/IMMUNOLOGY Interferon Type II/SECRETION
Interleukin-2/SECRETION Lymphocyte Culture Test, Mixed *Lymphocyte
Transformation Melanoma/*IMMUNOLOGY/PATHOLOGY Neoplasm Metastasis
Skin Neoplasms/*IMMUNOLOGY/PATHOLOGY Support, Non-U.S. Gov't
T-Lymphocytes/*IMMUNOLOGY Th1 Cells/IMMUNOLOGY Transfection Tumor
Cells, Cultured Vaccination JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).