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    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A recent investigation has indicated that reactive oxygen species (ROS) may play an important role in the activation of lymphocytes. The main aim of the present study is to find out what effect on lymphocyte activation is attributable to radical scavengers (RSs). AD0261 (AD) is a novel RS which displays strong inhibitory action on the generation of lipid peroxides and superoxide anions. This compound has been shown to be effective in inhibiting tritiated thymidine ([3H]TdR) incorporation into, IL-2 release from and IL-2 receptor (Rc) expression on Con A-stimulated mouse spleen cells and PHA-P-stimulated lymphocytes of human peripheral blood, IC50 values being in the range 1–10 μM. It also inhibited erythema formation elicited by transferring PHA-P-stimulated lymphocytes into guinea pigs (30–40% inhibition at 10 μM,p〈0.05). Further study showed that the activity of ornithine decarboxylase (ODC), which is a critical enzyme for cell proliferation, was inhibited by AD in a dose-dependent manner (IC50=1.0 μM). In summary, AD would seem to affect the lymphocyte activation by inhibiting ODC activity, probably through the action of ROS trapping.
    Type of Medium: Electronic Resource
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