title: Evaluation of blocking mechanisms against immunological responses in patients with laryngeal carcinoma.
abstract: The specific tumor-induced leukocyte inhibition factor (LIF) production in laryngeal cancer patients has been investigated before and after the removal of adherent cells in order to evaluate the existence of a suppressor activity; 20 patients served as subject. The LIF production, after challenging the lymphocytes with 3MKC1 autologous tumor extracts, was significant in 12 patients and showed a further significant increase after the removal of adherent cells. In 3 patients with no previous significant LIF production, there was a conversion to significance when the adherent cells were removed. The other patients did not show any significant variation. These data seem to suggest the existence of a suppressor activity exerted by adherent cells in laryngeal cancer patients on LIF production.
mesh_terms: D000368:Aged; D002464:Cell Migration Inhibition; D005260:Female; D006801:Humans; D007822:Laryngeal Neoplasms / Q000097:blood / Q000276:immunology*; D007961:Leukocyte Migration-Inhibitory Factors / Q000096:biosynthesis* / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology* / Q000378:metabolism; D008222:Lymphokines / Q000096:biosynthesis*; D008297:Male; D008875:Middle Aged; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
chemical_list: D007961:Leukocyte Migration-Inhibitory Factors; D008222:Lymphokines