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P1.04 - Immunooncology (Not CME Accredited Session) (ID 936)
- Event: WCLC 2018
- Type: Poster Viewing in the Exhibit Hall
- Presentations: 1
- Coordinates: 9/24/2018, 16:45 - 18:00, Exhibit Hall
P1.04-23 - Expression of Emerging Immunotherapy Targets in Early-Stage Squamous Lung Carcinoma (ID 13520)
16:45 - 18:00 | Author(s): Karla Ballman
Anti-PD1/PD-L1 immunotherapy has demonstrated response in approximately 20% of unselected advanced non-small cell lung cancer (NSCLC) patients. Strategies involving combination immunotherapies are under investigation to improve the overall response to immunotherapy. The objective of this study was to identify the expression of emerging immune targets in a cohort of early-stage squamous lung carcinoma (SqLC), which may be used to design combinatorial immunotherapy approaches.a9ded1e5ce5d75814730bb4caaf49419 Method
202 early stage (I-II) SqLC resected patient tumors and corresponding clinical data were collected from 6 cancer centers as part of the SPECS II program. Fourteen emerging immune targets or targeted axis were selected based on their advanced stage of development in preclinical/clinical studies. The mRNA expression level of these targets and PD-1/PD-L1 were determined by Affymetrix U133A gene expression profiling. The correlations among these targets and the overall survival were evaluated.4c3880bb027f159e801041b1021e88e8 Result
The mRNA levels of the immune molecules which were grouped on PD-L1 protein expression in early stage SqLC are shown in Figure 1. No correlation was found between the mRNA level of PD-L1 and the other immune targets expressed on APC/tumor cells, except PD-L2 (r2= 0.41, p<0.00001). We found that the immune cell receptor, CD226, correlated with CD96 and CD112R respectively (r2= 0.514, p<0.00001; r2= 0.476, p<0.00001), and CD96 correlated with CD112R (r2= 0.644, p<0.00001) as well. In addition, higher expression of GAL-9, CD48 and ICOS were associated with better prognosis [p= 0.0358, HR=0.249 (0.068, 0.912); p= 0.0309, HR=1.61 (1.04, 2.49); p= 0.0429, HR=2.47 (1.03, 5.93)].
Several emerging immune targets were expressed at higher levels than PD-L1 in this early stage SqLC cohort. The mRNA levels of all immune targets evaluated were independent of PD-L1 expression, except PD-L2. The expression of GAL-9, CD48 and ICOS were identified as prognostic. These results may provide important information in the design of future combination immunotherapies for early-stage SqLC.6f8b794f3246b0c1e1780bb4d4d5dc53
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