THYMOPENTIN IN SEZARY-SYNDROME

被引:24
作者
BERNENGO, MG [1 ]
APPINO, A [1 ]
BERTERO, M [1 ]
NOVELLI, M [1 ]
FIERRO, MT [1 ]
DOVEIL, GC [1 ]
LISA, F [1 ]
机构
[1] UNIV TURIN, DERMATOL CLIN 1, I-10126 TURIN, ITALY
来源
JNCI-JOURNAL OF THE NATIONAL CANCER INSTITUTE | 1992年 / 84卷 / 17期
关键词
D O I
10.1093/jnci/84.17.1341
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Background: Response to the treatment of Sezary syndrome (a cutaneous T-cell lymphoma) is poor. Since patients with this syndrome are elderly, aggressive chemotherapy is poorly tolerated and deep immunodepression may result in fatal opportunistic infections. Immunomodulating therapy seems important in the management of Sezary syndrome. Purpose: In a pilot study, we assessed the efficacy of thymopentin (TP-5), a synthetic pentapeptide, correlating clinical responses to the histologic and immunologic effects of the drug. Methods: Twenty Sezary syndrome patients received 50 mg TP-5 intravenously three times a week for a mean time of 16.3 months. Skin and lymph node histology and immunohistochemistry, circulating lymphoid cell subpopulations, and soluble interleukin-2 receptors were evaluated before treatment and during follow-up. Results: Eight complete remissions and seven partial remissions were obtained (75%). No change was observed in three patients, and disease progression was observed in two patients. The median duration of response was 22 months (complete remission, 25.5 months; partial remission, 14 months). Four-year survival probability was 53.9%. The responses were obtained when circulating Sezary cells were less than 2600/mm3. A significant reduction of CD4+ cells paralleled a CD8+ cell increase. An increase in NK cells (CD16+ and CD56+) was accompanied by significantly longer survival. Serum soluble interleukin-2 receptor values were a useful monitor of the clinical course and treatment. Loss of epidermotropism, reduction of Langherhans' cells, and HLA-DR+ keratinocytes were found. Conclusions: TP-5 is a potentially useful agent in the treatment of a subgroup of patients with Sezary syndrome; its activity seems to be mediated by an effect on a normal NK cell-like subpopulation. Implications: The biological and clinical role of this therapy in combination with conventional treatments will be the subject of future investigations.
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页码:1341 / 1346
页数:6
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