Quantitative measurement of T-lymphocyte activation by an enzyme-linked immunosorbent assay (ELISA) detecting interleukin-2 receptor expression.

Abstract:

:A monoclonal antibody prepared against the murine interleukin-2 receptor (IL-2R) was employed to develop an ELISA method for measuring the immunological activation of T-cells. The assay detects an increase in IL-2R expression on activated lymphocytes. Stimulated splenic lymphocytes displayed markedly higher IL-2R expression compared to unstimulated controls. A significant increase in IL-2R expression on lymphocytes was detected in mitogen-stimulated responses, in a one-way mixed leukocyte reaction (MLR) and in the antigen-specific responses to conalbumin and purified protein derivative (PPD) in vitro. At a constant cell number, the level of IL-2R expression was found to be dependent on the dose of the stimulant. A comparative study of the kinetics of activation of splenic lymphocytes in response to mitogen, antigen and allogeneic cells as measured by the IL-2R ELISA and the conventional tritiated thymidine (3HTdR) uptake assay revealed remarkable similarity. For both assays, the mitogenic response was detected within 12 h and peaked at 72 h, the MLR was detectable within 2-3 days and peaked at day 6, and the specific antigenic response was detected within 2 days and peaked on day 4-5. Hydroxyurea, an inhibitor of DNA synthesis, had no effect on early IL-2R expression by mitogen-stimulated splenic lymphocytes, however, only 20% of maximum IL-2R expression could be detected at later stages of incubation. In contrast, cycloheximide, an inhibitor of protein synthesis, completely abrogated IL-2R expression and proliferation of stimulated lymphocytes.

journal_name

J Immunol Methods

authors

Igietseme JU,Herscowitz HB

doi

10.1016/0022-1759(87)90114-1

subject

Has Abstract

pub_date

1987-02-26 00:00:00

pages

123-31

issue

1

eissn

0022-1759

issn

1872-7905

pii

0022-1759(87)90114-1

journal_volume

97

pub_type

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