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  • 1
    ISSN: 1432-0851
    Keywords: Eosinophilia ; Antitumor response ; Interleukin-2 ; Mitomycin C ; Advanced carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary On the basis of our clinical findings that the ability of cancer patients to generate lymphokine-activated killer cells became markedly augmented after mitomycin C administration, we designed a treatment regimen comprising mitomycin C 12 mg/m2, i.v. on day 1 and recombinant interleukin-2 700 U/m2 (8000 IU/kg), i.v. every 12 h from day 4 through day 8. The treatment course was repeated at almost 7-day intervals. Altogether 33 patients with advanced carcinoma, including mainly gastrointestinal carcinoma, were treated with this regimen. Of these, 10 had a partial response (PR) and 4 had a minor response (MR). Since eosinophil counts peaked 1 day after either the first or second course of the therapy, the posttreatment values were compared to each pretreatment level, with regard to the clinical antitumor response to this treatment. When patients who showed PR were defined as responders, absolute eosinophil counts and the percentages of eosinophils in responders after both the first and second courses of the therapy were significantly greater than each pretreatment value or the posttreatment level in nonresponders. Further, these findings were almost identical, when both PR and MR were considered to be a true remission and therefore patients who exhibited PR or MR were defined as responders, although the difference between posttreatment levels of eosinophils in responders and nonresponders was not significant at the second course. These results indicate that eosinophilia induced by this treatment correlates with the clinical response to this therapy.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1436-2813
    Keywords: chemoimmunotherapy ; VCN treatment ; autologous tumor cells ; BCG ; immune reactivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A chemoimmunotherapy program designed on the bases of the results of animal experiments was designed for 139 patients with various advanced malignant tumors. The treatment regimen consisted of cyclophosphamide (CY) 200 mg intravenously on day 1, Vibrio cholerae neuraminidase (VCN) treated autologous tumor cells admixed with BCG 5 to 10 mg intradermally on day 4 and mitomycin C (MMC) 10 to 16 mg and 5-fluorouracil (FU) 500 mg intravenously on day 7, of each course. Thereafter, maintenance treatment was started on day 14 with tegafur (FT) 600 mg and immunostimulants, such as OK432, PSK or levamisole. In the group of patients with gastric carcinoma, as compared to historical control patients, this treatment significantly improved survival in those with stage III disease (p〈0.02), stage IV disease (p〈0.05) and recurrent or unresectable tumor (p〈0.01). Immune reactivities as measured by PPD skin test and PHA lymphocyte blastogenesis increased slightly following the therapy. After completion of the treatment, cellular immunity to autologous tumor extract could be detectedin vitro by macrophage migration inhibition technique in 12 of 42 patients. The relationship of immune reactivity before or after therapy to patient survival was examined. Analysis of survival curves according to PPD skin test showed significant prolongation of survival in patients with positive reaction as compared to those with negative response following the treatment.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1436-2813
    Keywords: cell-mediated cytotoxicity ; regional lymph nodes ; gastric carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The cell-mediated cytotoxic activities of cells from the perigastric lymph nodes (LNC) were assayed in patients with gastric carcinoma. These activities were compared with those of the peripheral blood mononuclear cells (PBM), and also with the LNC of patients with benign lesions. The capacity of LNC to be converted to cytotoxic cells in mixed cell culture was significantly impaired in the cancer patients as compared to that of either the PBM from the same patients, or the LNC from patients with benign lesions. The natural killer cell (NK) activity of LNC was significantly lower than that of the PBM in both groups of patients. The cytotoxic activity induced by phytohemagglutinin activation (PAK) in the LNC from patients with carcinoma, as well as from those with benign lesions was also significantly decreased, when compared to that of the PBM, although the ability of LNC to produce interleukin 2 (IL 2) was significantly increased. The ability of these cells to generate cytotoxicity after activation with IL 2 (LAK) was therefore examined, and a decreased capacity in LNC was observed. These results indicated that the ability of T cells in LNC to develop into cytotoxic cells in patients with gastric carcinoma was impaired, and that the nonspecific cytotoxicity, including NK or PAK, as well as LAK activity, was essentially low in the perigastric lymph nodes.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1436-2813
    Keywords: cell-mediated cytotoxicity ; spleen cells ; interleukin 2 ; activated killer cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The cell-mediated cytotoxic activities of cells from the spleens (SP cells) of patients with gastric carcinoma were assayed in comparison with the activities of peripheral blood mononuclear cells (PBM cells) from the same patients, and from patients with benign lesions. The natural killer cell (NK) activity of the SP cells and their capacity to generate allogeneic cytotoxicity in mixed lymphocyte culture (MLC) were very similar to those of the PBM cells. The cytotoxic activity of SP cells induced by alloactivation in MLC, however, was significantly higher than that of the PBM cells from the same patient as well as from patients with benign lesions. The production of interleukin 2 (IL 2) and the ability to induce cytotoxic cells after activation with IL 2 (LAK) were therefore examined. Both the ability to produce IL 2 and to generate LAK cells were shown to be significantly increased in SP cells when compared to PBM cells. These results indicate that the spleen may be a potential reservoir for the precursors of these activated killer cells in patients with gastric carcinoma. Furthermore, it may play an important role in the defence against tumors in these patients.
    Type of Medium: Electronic Resource
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