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The alkylating agent cyclophosphamide may suppress or enhance immune responses in vivo but is inactive in vitro unless metabolized by microsomal enzyme activation. 4-hydroperoxycyclophosphamide (4-HC) is a synthetic compound that is spontaneously converted in aqueous solution to the active metabolites. In this report, we examined the in vitro sensitivity of(More)
Positive and negative selection procedures combined with cytofluorographic analysis and lysis with monoclonal antibodies were utilized to identify the T lymphocyte subset that produces human gamma interferon (gamma-IFN) (formerly referred to as "immune" or "type II" interferon) in response to mitogen stimulation. Lymphocytes were separated on the basis of(More)
Chronic lymphocytic leukemia (CIL) of B-cell origin results in the malignant proliferation of small immunoglobulinbearing lymphocytes. There is currently a controversy in the literature regarding both the ability of this leukemic population to differentiate into mature plasma cells. as well as the ability of apparently normal T cells from these patients to(More)
A single rising dose tolerance trial of rDNA interferon-alpha 2 (IFN-alpha 2) was conducted in eight patients with the diagnoses of non-Hodgkin's lymphoma (NHL), multiple myeloma, and chronic lymphocytic leukemia (CLL). Patients received a total of six i.m. doses at weekly intervals as follows: 1, 3, 10, 30, 60, and 100 x 10(6) IU. Patients were monitored(More)
The alkylating agent cyclophosphamide (CYP) 1 may suppress or enhance both B and T cell-mediated immune responses in vivo but requires microsomal enzyme activation for in vitro efficacy. 4-hydroperoxycyclophosphamide (4-HC) is a synthetic compound spontaneously hydrolyzed in aqueous solution to 4-hydroxycyclophosphamide, the initial metabolite formed by(More)
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