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Functional inactivation of CD4+CD25high regulatory T cells using low dose human/mouse chimeric anti-CD25 monoclonal antibody enhanced lymphokine-activated killer cells activity

Functional inactivation of CD4+CD25high regulatory T cells using low dose human/mouse chimeric... Functional modulation of regulatory T cells (T-regs) is one possible approach to cancer immunotherapy. In this study, we investigated whether low-dose basiliximab, a chimeric anti-CD25 monoclonal antibody, could suppress the T-regs function not by depletion but by inactivation, and increase immune responses. Peripheral blood mononuclear cells from healthy donors and patients with malignancy were collected. We tried T-regs inactivation using various concentrations of basiliximab before induction of lymphokine-activated killer (LAK) cells. We measured cell proliferation, lymphocyte phenotype, intracellular T-regs maker, and Th1/2 cytokines production. Our results showed that the optimal concentration of basiliximab for specifically down-modulating only T-regs was 0.001 μg/ ml. The reduction of Th-2 cytokine secretion with concomitant APC induction without suppressing cell proliferation offers the promise of a novel adoptive immunotherapy to cancer patients. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Targeted Oncology Springer Journals

Functional inactivation of CD4+CD25high regulatory T cells using low dose human/mouse chimeric anti-CD25 monoclonal antibody enhanced lymphokine-activated killer cells activity

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References (29)

Publisher
Springer Journals
Copyright
Copyright © 2008 by Springer-Verlag
Subject
Medicine & Public Health; Biomedicine general; Oncology
ISSN
1776-2596
eISSN
1776-260X
DOI
10.1007/s11523-008-0095-4
Publisher site
See Article on Publisher Site

Abstract

Functional modulation of regulatory T cells (T-regs) is one possible approach to cancer immunotherapy. In this study, we investigated whether low-dose basiliximab, a chimeric anti-CD25 monoclonal antibody, could suppress the T-regs function not by depletion but by inactivation, and increase immune responses. Peripheral blood mononuclear cells from healthy donors and patients with malignancy were collected. We tried T-regs inactivation using various concentrations of basiliximab before induction of lymphokine-activated killer (LAK) cells. We measured cell proliferation, lymphocyte phenotype, intracellular T-regs maker, and Th1/2 cytokines production. Our results showed that the optimal concentration of basiliximab for specifically down-modulating only T-regs was 0.001 μg/ ml. The reduction of Th-2 cytokine secretion with concomitant APC induction without suppressing cell proliferation offers the promise of a novel adoptive immunotherapy to cancer patients.

Journal

Targeted OncologySpringer Journals

Published: Nov 11, 2008

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