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  • Title: The effect of Edrecolomab (Mo17-1A) or fluorouracil-based chemotherapy on specific immune parameters in patients with colorectal cancer. A comparative study.
    Author: Tsavaris NB, Katsoulas HL, Kosmas C, Papalambros E, Gouveris P, Papantoniou N, Rokana S, Kosmas N, Skopeliti M, Tsitsilonis OE.
    Journal: Oncology; 2004; 67(5-6):403-10. PubMed ID: 15713997.
    Abstract:
    OBJECTIVES: We investigated the immune profile of patients with resected Dukes' stage C colorectal cancer (CRC), receiving adjuvant therapy with edrecolomab (Mo17-1A) or first-line 5-fluorouracil (5-FU)-based chemotherapy. PATIENTS AND METHODS: Patients received either 5 doses of Mo17-1A over 13 weeks, or 5-FU/leucovorin, or 5-FU/levamisole over 6 and 12 months, respectively. Peripheral blood was collected postoperatively and 4 months after therapy initiation. Peripheral blood mononuclear cells were tested in the autologous mixed lymphocyte reaction (AMLR), for natural killer (NK) and lymphokine-activated killer (LAK) cell activity. Serum cytokines were quantified by ELISA. RESULTS: Fifty-two patients entered the study. Postoperatively, they exhibited decreased levels of interleukin (IL)-2, interferon-gamma, IL-12, granulocyte-macrophage colony-stimulating factor and IL-15, low cellular immune responses (AMLR, NK- and LAK-cytotoxicity) and increased levels of IL-1beta, tumor necrosis factor-alpha, IL-6, IL-10 and prostaglandin E(2). After four months of therapy, patients receiving edrecolomab demonstrated enhanced AMLR, NK, LAK activity, increased serum levels of cytokines regulating such responses and reduced levels of acute-phase cytokines and immune suppressors, compared to patients treated with conventional chemotherapy. CONCLUSIONS: Postoperative adjuvant therapy with edrecolomab restores the in vivo deficient immune responses of patients with resected Dukes' C CRC despite its clinical ineffectiveness in recent randomized adjuvant trials. These results suggest that further immunological studies with the combination of edrecolomab and chemotherapy are required.
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