Cytomegalovirus-specific cytolytic T-cell lines and clones generated against adenovirus-pp65-infected dendritic cells

被引:25
作者
Keever-Taylor, CA
Margolis, D
Konings, S
Sandford, GR
Nicolette, CA
Lawendowski, C
Burns, WH
机构
[1] Med Coll Wisconsin, Bone Marrow Transplant Program, Dept Med, Milwaukee, WI 53226 USA
[2] Genzyme Corp, Framingham, MA 01701 USA
关键词
cytomegalovirus; cytolytic T cells; dendritic cells; allogeneic BMT;
D O I
10.1053/bbmt.2001.v7.pm11400946
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Cytomegalovirus (CMV) infection is a serious complication of allogeneic bone marrow transplantation (BMT). CMV disease can usually be prevented by passive immunization with donor-derived CMV-pp65-specific T-cell clones if provided early post-EMT. The classic method of generating CMV-specific T-cell clones requires donor-derived fibroblast lines infected with CMV as stimulators, thus limiting the availability of CMV immunotherapy to those patients for whom a donor skin biopsy can be obtained 6 to 8 weeks pretransplantation. To overcome this limitation we have used monocyte-derived dendritic cells (DCs) to induce donor anti-CMV cytotoxic T lymphocytes (CTLs). Matured, adenopp65-infected DCs were added at day 0 and at day 7 of a 2-week culture of donor peripheral blood mononuclear cells. DC-primed cultures were compared with cultures stimulated in an identical fashion with CMV-infected fibroblasts or with adeno-pp65-infected freshly isolated blood monocytes. Specific killing of CMV-infected fibroblasts was detected in all except the culture stimulated with PP65-infected monocytes. DCs infected after maturation elicited greater CTL activity than did DCs matured after infection. A series of 5 CD8(+) clones from a fibroblast-stimulated culture and 7 CD8(+)-clones from a mature-DC-stimulated culture derived from a single HLA-A*0201(+) individual were characterized. Ah 12 clones lysed autologous CMV-infected fibroblasts. Ah except 1 clone from the CMV-infected fibroblast arm (fibroblast arm) lysed vaccinia-pp65-infected B-lymphoblastoid cell lines (BLCLs); none lysed vaccinia-pp150-infected or noninfected BLCLs. Ten of 10 CD8(+) clones tested were restricted by HLA-A*0201. Seven of the 12 clones were V beta6(+) (2 from the fibroblast arm and 5 from the DC arm) with an identical V beta6.1-J1.4 sequence. Three clones from the fibroblast arm and 5 clones from the DC arm recognized the pp65 peptide NLVPMVATV (amino acids [aa], 495-503). These data show that CMV-specific T-cell clones with similar restriction patterns, T cell-receptor usage, and specificity can be generated using monocyte-derived pp65-infected-DC or CMV-infected-fibroblast stimulators. This approach should broaden the applicability of CMV-specific T-cell immunotherapy to a wider spectrum of patients by reducing the time required to generate CMV-specific T-cell clones.
引用
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页码:247 / 256
页数:10
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