Document 0024 DOCN M9650024 TI Immunological alterations induced by adjuvant treatment of postoperative colon carcinoma Duke's B or C with levamisole in combination with 5-FU. DT 9605 AU De Brabander M; Vandebroek J; Wassenaar H; De Cree J; Baisier A; Demoen B; De Ridder R; Jagers E; Roels V; Vogels O; et al; Clinical Research Unit St. Bartholomeus, Jan Palftjn Hospital,; Merksem, Belgium. SO Anticancer Res. 1995 Sep-Oct;15(5B):2271-7. Unique Identifier : AIDSLINE MED/96152477 AB BACKGROUND: Postoperative 5-FU combined with levamisole increases 5 year survival in colon cancer patients (Duke C) by 30% (1). In order to investigate the potential immunological mechanism, we determined lymphocyte subtypes and markers of immune activation in 22 patients before and during one year of postoperative adjuvant treatment. METHODS: Before and regularly during treatment, according to the scheme described by Moertel (1), major lymphocyte subsets were quantified by flow cytometry. Serum neopterin, soluble IL2-receptors, beta 2-microglobulin, TNF-alpha and interferon-gamma were determined by Elisa. RESULTS: The CD4/CD8 ratio increased significantly after levamisole was added to the treatment, as did the levels of soluble IL2-receptors. The percentages of T-cells expressing the interleukin 2 receptor followed a similar trend. The levels of neopterin tended to decrease during the combined treatment course. This was paralleled by a progressive fall in the proportion of T-cells expressing HLA-DR. CONCLUSIONS: The treatment induced significant and consistent alterations in major immunological mediators and lymphocyte subtypes. It remains to be established whether these changes are related to the therapeutic effect. DE Adjuvants, Immunologic/*ADMINISTRATION & DOSAGE Aged Aged, 80 and over Antigens, CD45/ANALYSIS Antineoplastic Agents, Combined/*THERAPEUTIC USE Chemotherapy, Adjuvant Colonic Neoplasms/*DRUG THERAPY/IMMUNOLOGY CD4-CD8 Ratio/DRUG EFFECTS Female Fluorouracil/*ADMINISTRATION & DOSAGE Human Levamisole/*ADMINISTRATION & DOSAGE Male Middle Age Receptors, Interleukin-2/ANALYSIS T-Lymphocytes/DRUG EFFECTS JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).