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The determination of 2'-5'-oligoadenylate synthetase in peripheral blood mononuclear cells is used as a biological response parameter during therapy with interferon and in the diagnosis of diseases related to the interferon system. In this communication, some general aspects concerning the preparation of 2'-5'-oligoadenylate synthetase from peripheral blood mononuclear cells and the incubation conditions of the 2'-5'-oligoadenylate synthetase reaction are reported. Four analytical procedures for the determination of the products formed during the 2'-5'-oligoadenylate synthetase reaction were comparatively investigated and the advantages and limitations of the assays are discussed. As an example of possible clinical application, the levels of 2'-5'-oligoadenylate synthetase were determined in the mononuclear cell fraction of peripheral blood from healthy persons as well as from children with chronic myelogenous leukaemia.

Methods for the Determination of the Interferon-Induced Enzyme 2'-5' Oligoadenylate Synthetase in Mononuclear Blood Cells