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C. Mesia
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P2.07 - Immunology and Immunotherapy (ID 708)
- Event: WCLC 2017
- Type: Poster Session with Presenters Present
- Track: Immunology and Immunotherapy
- Presentations: 1
- Moderators:
- Coordinates: 10/17/2017, 09:30 - 16:00, Exhibit Hall (Hall B + C)
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P2.07-044 - Thyroid Disfunction in Advanced NSCLC Patients Treated with Nivolumab out of Clinical Trial: A Real-World Data Analysis (ID 10028)
09:30 - 09:30 | Author(s): C. Mesia
- Abstract
Background:
Immune-related adverse events occur in a subset of patients (pts) treated with immune checkpoint inhibitors blocking PD1/PD-L1 interaction. It has been reported that NSCLC pts treated with pembrolizumab who developed thyroid dysfunction (TD) had better clinical outcome. In this retrospective study, we examined the prognostic value of TD in advanced NSCLC pts treated with nivolumab.
Method:
Ninety-seven pts with advanced NSCLC treated with nivolumab in second and latter lines out of clinical trial at the Institut Català d’Oncologia (Barcelona, Spain) between November 2015 and March 2017 were included in this analysis. Thyroid tests were assessed at baseline and at the clinician’s discretion during treatment. TD was defined as abnormal levels of TSH value during nivolumab treatment. Progression-free survival (PFS) and overall survival (OS) were calculated using the Kaplan-Meier method.
Result:
Of 97 pts, most patients received nivolumab in second line (73%). The median age was 63 years (38-82), most were men (76%), former or active smokers (87%), with adenocarcinoma (59%) or squamous cell carcinoma (31%), and had good performance status (88% ECOG PS 0-1). With a median follow-up of 8 months, 42 (43%) patients had died and 60 (62%) presented progressive disease. Sixteen pts (16.5%) developed TD that was G1 (9, 56%) or G2 (7, 44%). Two pts who developed G2 hyperthyroidism required steroid treatment and 5 pts who developed G2 hypothyroidism received substitutive hormone therapy. Median time until TD was 41 days (95% CI 37-45) and pts with TD received more cycles of nivolumab compared with euthyroid pts (11.5 versus 4, respectively). Pts with TD were more likely to achieve a tumor response compared to euthyroid pts (44% versus 14%, p=0.13). Median PFS and OS were significantly longer in pts who developed thyroid dysfunction compared with euthyroid pts. Median PFS was 3.7 months in euthyroid pts vs NR in pts with TD (p=0.001; odds ratio, 0.14; 95% CI 0.04-0.48) and median OS was 8.1 months vs NR, respectively (p=0.005; odds ratio, 0.15; 95% CI 0.03-0.69).
Conclusion:
This real-world data analysis showed that treatment-related TD predicts favorable clinical outcome from nivolumab in advanced NSCLC pts. A comprehensive analysis of thyroid stimulating hormone (TSH) kinetics will be presented at the meeting.
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P2.08 - Locally Advanced Nsclc (ID 709)
- Event: WCLC 2017
- Type: Poster Session with Presenters Present
- Track: Locally Advanced NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 10/17/2017, 09:30 - 16:00, Exhibit Hall (Hall B + C)
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P2.08-006 - Immunological Biomarkers Characterization in Locally Advanced Non-Small Cell Lung Cancer Treated with Concurrent Chemo-Radiotherapy (ID 9584)
09:30 - 09:30 | Author(s): C. Mesia
- Abstract
Background:
The immune microenvironment of locally advanced non-small cell lung cancer (NSCLC) has not been systematically studied. Our aim was to determine the prognostic value of immunological biomarkers expression in a cohort of patients (pts) in this clinical setting.
Method:
We retrospectively reviewed 46 bronchial biopsies from locally advanced NSCLC. Pts were treated between 2010 and 2014 with concurrent chemo-radiotherapy (cCRT) at the Catalan Institute of Oncology. The following immunological markers were assessed by immunohistochemistry: PD-L1, ≥5% membrane expression on tumor cells was considered positive (+); HLA-Class I expression was classified into 0,1+,2+ according to membrane intensity; CD8+ tumor infiltrating lymphocytes (CD8 TILs) classified into low ≤5% or high >5% intratumoral infiltration. Chi-square test for assessing correlation and survival analysis by Kaplan-Meier method were used.
Result:
From 46 pts: Median age was 65 (43-81); gender: male 94%, female 6%; ECOG≤1 96%; smoking status: current 67%, former 30%, never 3%; histology: squamous cell carcinoma (SCC) 63%, adenocarcinoma (ADC) 24%, NSCLC (NOS+large cell) 13%; cN0-1 30%, cN2 57%, cN3 13%. Platinum doublet CT: Cisplatin 57%, Carboplatin 43%. PD-L1 was positive in 38% of cases and was positively correlated with HLA-I expression (p= 0.015) and CD8-TILs (p= 0.008). No correlations between PD-L1/CD8 TILs status and G3-4 radio-induced toxicities (pneumonitis, esophagitis) were found. At a median follow-up of 48 months (m), 53% of pts had relapsed. According to immune phenotype, median overall survival (mOS) was 20m (PD-L1 +, CD8 high; n=10) vs 17 m (PDL1 negative, CD8 low; n=19) vs not reached (PD-L1 negative, CD8 high; n=5) (p=0.23). Considering CD8 TILs, mOS in high CD8 (n=15) was 35m vs 18 m in low CD8 (n=26) (p=0.22).
Conclusion:
PD-L1, HLA-I and TILs CD8 expression was positively correlated. The potential role of TILs CD8+ as a prognostic biomarker in this cohort of pts that comprised mostly SCC histology, is promising. These results should be investigated in a larger cohort.
