SERUM IMMUNOSUPPRESSION TEST AS A NEW TOOL FOR IMMUNODIAGNOSIS OF LUNG-CANCER

  • 1 January 1980
    • journal article
    • research article
    • Vol. 40  (2) , 444-447
Abstract
The immunosuppressive activity of serum, from lung cancer patients, on the anti-sheep red blood cell plaque-forming cell response in mouse spleens was evaluated by an in vivo technique in 64 patients with lung cancer and in a control group of 53 patients with a variety of nonmalignant disorders and 15 healthy adults. When immunization with sheep red blood cells was done on day 5 after serum injection, the frequency of immunosupression by serum from lung cancer patients [50 of 64 (78%)] was significantly higher than with serum from patients with nonmalignant diseases [3 of 53 (6%); P < 0.025] or from healthy adults [1 of 15 (7%); P < 0.005]. In serum from lung cancer patients, there was no correlation between the serum immunosuppressive activity and histological classification. However, sera from stage II patients showed a relatively high frequency of suppression [25 of 27 (93%)] compared with sera from the stage I group [7 of 14 (50%); P < 0.005]. In experiments examining the transfer of plaque-forming cell-suppressive activity, tests using 107 thymus cells and more than 105 spleen cells from mice given injections of lung cancer serum indicated that suppressive action is mediated by the generation of suppressor cells by lung cancer serum. The clinical use of this test in diagnosis and immunological studies of lung cancer is discussed.

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