PMID- 12105753 OWN - NLM STAT- MEDLINE DCOM- 20020726 LR - 20041117 IS - 0341-2040 (Print) IS - 0341-2040 (Linking) VI - 180 IP - 1 DP - 2002 TI - Additive effect of Interleukin-12 and Interleukin-18 on the T-helper cell pathway of malignant pleural effusion. PG - 15-24 AB - Interleukin-18 (IL-18) is a novel cytokine with interferon-gamma (IFN-gamma)-inducing activity, thus favoring the T-helper type 1 (Th-1) pathway. The present study attempts to define the role of IL-18 on the functions of lymphocytes isolated from malignant pleural effusions (EAL, effusion-associated lymphocytes). EAL from 10 patients with malignant pleural effusion were incubated with IL-2, IL-12, or IL-18 with/without a alpha CD3 antibody. ELISA, proliferation, and cytotoxicity assays were performed. IL-18 alone was found to have no significant effect on EAL in terms of cytokine production, lymphocyte proliferation, or cytotoxicity against tumor targets. IL-18 also had no significant additive or synergistic effect on IL-2, IL-12, or alpha CD3 co-cultured EAL. However, when IL-18 was used with IL-12, the highest IFN-gamma/IL-10 ratio was derived, suggesting that these two cytokines had an additive effect in leading EAL from the Th-2 to the Th-1 pathway. Furthermore, 1 of 5 patients' EAL had its strongest cytolytic activity against an autologous tumor when the EAL was cultured with IL-2 plus IL-18, as compared with the other 4 patients whose EAL cytolytic activity against autologous tumor was highest when using IL-2 plus alpha CD3. These findings suggest that IL-18 alone did not have a significant effect on EAL, and that IL-18 did not enhance alpha CD3's activity on EAL. However, its additive effect with IL-12 in the Th-1 pathway and with IL-2 in its cytolytic activity against an autologous tumor deserve further studies. FAU - Yao, N S AU - Yao NS AD - Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan, R.O.C. FAU - Chen, Y M AU - Chen YM FAU - Perng, R P AU - Perng RP FAU - Whang-Peng, J AU - Whang-Peng J LA - eng PT - Journal Article PL - United States TA - Lung JT - Lung JID - 7701875 RN - 0 (Interleukin-18) RN - 187348-17-0 (Interleukin-12) SB - IM MH - Adenocarcinoma/complications MH - Aged MH - Female MH - Humans MH - Interleukin-12/*immunology MH - Interleukin-18/*immunology MH - Lung Neoplasms/complications MH - Male MH - Pleural Effusion, Malignant/immunology/*pathology MH - T-Lymphocytes, Helper-Inducer/*immunology EDAT- 2002/07/10 10:00 MHDA- 2002/07/27 10:01 CRDT- 2002/07/10 10:00 PHST- 2002/01/08 00:00 [accepted] PHST- 2002/07/10 10:00 [pubmed] PHST- 2002/07/27 10:01 [medline] PHST- 2002/07/10 10:00 [entrez] AID - 10.1007/s004080000077 [doi] PST - ppublish SO - Lung. 2002;180(1):15-24. doi: 10.1007/s004080000077.