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SYSTEMATIC REVIEW
Year : 2016  |  Volume : 143  |  Issue : 7  |  Page : 1-10

Adoptive immunotherapy with interleukin-2 & induced killer cells in non-small cell lung cancer: A systematic review & meta-analysis


1 Evidence Based Medicine Centre, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road; The First Clinical Medicine College of Lanzhou University, 1 Donggang West Road; Gansu Provincial Second People's Hospital, 1 Hezheng West Road, Chengguan District, Lanzhou, Gansu, PR China
2 Evidence Based Medicine Centre, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road; The First Clinical Medicine College of Lanzhou University, 1 Donggang West Road; Gansu Provincial Cancer Hospital, 2 Xiaoxihu East Street, Qilihe District, Lanzhou, Gansu, PR China
3 Evidence Based Medicine Centre, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road; The First Clinical Medicine College of Lanzhou University, 1 Donggang West Road, Chengguan District, Lanzhou, Gansu, PR China

Correspondence Address:
Kehu Yang
Evidence Based Medicine Centre, School of Basic Medical Sciences, Lanzhou University, 199 Donggang West Road, Chengguan District, Lanzhou 730000, Gansu
PR China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0971-5916.191738

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Background & objectives: The effectiveness of interleukin-2 (IL-2) and induced killer cells for non-small cell lung cancer (NSCLC) is controversial. This study evaluates the efficacy and safety of interleukin-2 and induced killer cells on NSCLC, so as to provide references for further clinical practice and research. Methods: Relevant randomized controlled trials (RCTs) were searched in Cochrane library (Issue 2, 2013), Web of Science (1980-March 2013), PubMed (1966-March 2013), China Knowledge Resource Integrated database (CNKI) (1994-March 2013), China Biology Medicine database (CBM) (1978-March 2013), VIP (1989-March 2013), and Wan Fang databases (1997-March 2013). There were no language restrictions. After independent quality assessment and data extraction by two authors, meta-analysis was conducted by RevMan 5.1 software. Results: Ten RCTs were included. Odds ratio (OR), 95% confidence intervals (CI), P value expressed as test group (interleukin-2 or induced killer cells combined chemotherapy) versus control group (chemotherapy alone), was 2.02 (1.24, 3.29; P=0.004) for disease control rate. Hazard ratios (HR) (95% CI; P value), expressed as test group (interleukin-2 or induced killer cells) versus control group, were 0.60 (0.46, 0.79; P=0.0003) for overall survival of postoperative treatment, and 0.77 (0.60, 0.99; P =0.04) for overall survival of combination with chemotherapy. Mean differences (MD) (95% CI; P value), expressed as test group (interleukin-2 or induced killer cells) versus control group (after treatment), were 11.32 (6.32, 16.33; P=0.00001) for NK cells, 11.79 (2.71, 20.86; P=0.01) for CD3+ cells, 14.63 (2.62, 26.64; P=0.02) for CD4+ cells, and -4.49 (-7.80, 1.18; P=0.008) for CD8+ cells. Interpretation & conclusions: The meta-analysis showed that IL-2 or induced killer cells combination therapy was efficacious in treating NSCLC and improved overall survival. Further analysis of trials having adequate information and data need to be done to confirm these findings.


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