Immunotherapy of lung cancer using biotechnological methods.

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A controlled, randomized study has been conducted to assess the efficacy of adoptive immunotherapy with Interleukin 2(IL2)and lymphokine activated killer cells(LAK cells)combined with chemotherapy or radiotherapy for advanced non-small cell lung cancer(NSCLC)patients. Out of 403 NSCLC patients who received resection of primary tumors from Jan. 1985 to Dec. 1990 in our hospital, a total of 106 patients with relatively curative and non-curative resection, were entered into a randomized controlled trial of postoperative adjuvant immunotherapy. The former group(n=36)was divided into three groups ; a)Chemotherapy(CDDP+VDS)group(n=13), b)Chemoimmunotherapy(CDDP+VDS+IL2+LAK cells)group(n=12), and c)control group(n=ll). The latter(noncurative)group(n=68)was randomized into d)immunotherapy(chemo/radiotherapy+IL2+LAK cells)group(n=33)and e)control(chemo/radiotherapy alone)group(n=35).The overall 4 year survival rates of immunotherapy(b+d)and control(a+c+e)groups were 52.4% and 28.3% respectively and the difference was significant(p<0.01)with generalized Wilcoxon test. In the relative curative group, the 4 year survival rates of a), b), and c)groups were 34.2%, 70.9% and 34.1% respectively. In the non-curative group, those of d)and e)groups were 43.1% and 29.3%(p<0.05). From this study, it it suggested that adoptive immunotherapy with IL2 and LAK cells is effective as a postoperative adjuvant immunotherapy for advanced NSCLC patients.