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  • 1990-1994  (3)
  • 1940-1944
  • 1910-1914
  • 1890-1899
  • interleukin-2  (3)
  • 1
    ISSN: 1573-8280
    Keywords: apolipoproteins ; C-reactive protein ; interferon ; interleukin-2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Six patients with confirmed malignant disease received four consecutive weekly cycles of human recombinant interleukin-2 (IL-2) 4 days/week, continuous iv. infusion, 3 × 106 U/m2/day. Plasma cholesterol decreased a mean of 7% within 24 hours after IL-2 infusion and decreased by 33% within 4 days. Plasma cholesterol was significantly lower than baseline concentration by day 21 (−21%), and day 25 (−41%) was significantly lower than day 21. Decreased plasma cholesterol was the result of decreased HDL and LDL cholesterol concentrations. Plasma triglyceride demonstrated a mean increase of 46% after 4 days of therapy and remained greater than baseline concentrations at all time points analyzed. Apolipoprotein AI and AII decreased concomitantly with HDL-cholesterol concentrations, whereas apolipoprotein B after an initial mean decrease of 17% during the first cycle was not significantly different from baseline during the fourth cycle. Apolipoprotein E and Lp(a) were not significantly affected by IL-2 treatment. Plasma C-reactive protein (CRP) increased by 79% within 24 hours of therapy, increased by 254% on day 4, then decreased to baseline concentrations by day 21 after 3 days off of IL-2. Day 25 CRP was elevated compared to both baseline and day 21 concentrations. IL-2 induced plasma lipoprotein changes may be due in part to the induction of interferon gamma.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-8280
    Keywords: BLT-esterase ; cytotoxic cells ; immunotherapy ; interleukin-2 ; lymphokine-activated killer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract BLT-esterase and cytolytic activity by humanin vitro andin vivo generated Lymphokine Activated Killer (LAK) cells were measured. Lysates made from peripheral blood lymphocytes (PBL) of both normal donors and cancer patients receiving IL-2 therapy were assayed for BLT-esterase activity in a spectro-photometric assay. Cytotoxicity of PBL was measured in a51Cr-release assay. Both BLT-esterase activity and cytotoxicity increased when normal-donor PBL were stimulatedin vitro with IL-2, with greater activities at higher IL-2 concentrations. The activities also increased over time, peaking at 6 days ofin vitro stimulation. Patient PBL had increased BLT-esterase and cytotoxic activities after 4 weeks ofin vivo IL-2 treatment. This association of BLT-esterase activity and cytotoxicity with IL-2 activation is consistent with the model that LAK cytotoxicity is mediated by secretion of BLT-esterase associated cytolytic granules. Lymphocytes obtained afterin vivo IL-2 treatment and cultured for 3-4 hours in IL-2 show markedly augmented cytotoxic activity but no increase in their BLT-esterase activity. These results indicate that the increased cytotoxicity observed after this brief pulse ofin vitro IL-2 followingin vivo IL-2 treatment must result from effects of IL-2 other than the production of more esterase-containing cytolytic granules.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-8280
    Keywords: cytokines ; immunotherapy ; interleukin-2 ; interleukin-2 receptors ; lymphokine activated killer cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Conclusions Considerable enthusiasm remains for the successful utilization of the immune system for the immunotherapy of human cancers. Immunotherapeutic maneuvers have been able to mediate impressive antitumor responses for some patients with advanced and refractory malignancies. Unfortunately, the number of patients who benefit from current immunotherapies is low, while the toxicity for many of the patients receiving these treatments is high. It is becoming quite clear that the development of successful immunotherapeutic strategies will involve a carefully chosen combination of immunotherapeutic modalities or of immunotherapy combined with either surgery, radiation therapy, or chemotherapy. The use of an IL-2 based regimen which is clinically tolerable and can provide significant immune activation continues to remain central to many of these treatment approaches. Preclinicalin vitro and animal model systems can evaluate promising treatment strategies, including combination approaches. As an effective immunotherapeutic approach will likely require use of a combination of biologically active agents, the scheduling of these therapies may have profound importance both for optimal antitumor responses as well as clinical tolerance.
    Type of Medium: Electronic Resource
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