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Crude fractions of urine from pregnant women are immunosuppressive in vitro. An 85-kilodalton immunosuppressive glycoprotein purified to homogeneity from such urine inhibited in vitro assays of human T-cell and monocyte activity at concentrations of 10(-9) to 10(-11) molar. This material was nontoxic and blocked early events required for normal T-cell(More)
Spontaneous monocyte-mediated cytotoxicity (SMMC) in 34 patients treated with a chemotherapeutic regimen including cisplatin for various malignancies was depressed (median 7% 51Cr release) compared with SMMC in 31 normal controls (median 43%; p < 0.0001). Cytotoxicity in 7 patients with stage III or IV ovarian carcinoma was then followed during six cycles(More)
The activation of T lymphocytes for antigen-induced proliferative responses (1), T lymphocyte cytotoxicity (2), delayed-type hypersensitivity (3), and helper function for antibody responses (4) requires their recognition of the nominal antigen on the surface of an antigen-presenting cell (APC) 1 bearing Ia-DR molecules encoded by the I region of the major(More)
Endogenous mammalian lectin-like sugar-binding molecules have been previously described that have immunoregulatory properties. Further, the addition of defined simple saccharides to lymphocyte cultures has been shown to inhibit a variety of in vitro lymphocyte functions, presumably because these sugars are able to compete with the binding of endogenous(More)
Synergistic cytotoxicity is a term used to describe a cytotoxic system in which xenogeneic erythrocyte target cells are lysed in the presence of nonimmune human mononuclear effector cells and antibody-depleted normal human serum. Neither the mononuclear cells nor the serum alone are cytolytic to the target erythrocytes. Previous studies have shown that the(More)
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