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Yukihiro Toi
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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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P2.07-004 - Immune-Related Adverse Events (irAEs) of Nivolumab Predicts Clinical Benefit in Advanced Lung Cancer Patients (ID 7956)
09:30 - 16:00 | Presenting Author(s): Yukihiro Toi
- Abstract
Background:
Immune checkpoint inhibition (ICI) has now become the new standard treatment for non-small-cell lung cancer (NSCLC). However, immune-related adverse events (irAEs) are frequently observed. In melanoma, those patients who had irAEs were shown to be associated with prolonged overall survival. Little is known about the correlation between the development of irAEs and clinical efficacy in NSCLC patients.
Method:
Patients with advanced NSCLC treated with nivolumab monotherapy at Sendai Kousei Hospital (n=70) between January 2016 to March 2017 were included in our study. Subjects were categorized into either the irAEs-incident group (IrAEs group) or non-irAEs-incident group (Non-irAEs group) and were evaluated with respect to objective response rate (ORR), disease control rate (DCR), progression-free survival (PFS), overall-survival (OS), and treatment continuation rate. They were also further divided into either responder group or non-responder group, and we analyzed predictive factors of treatment responses.
Result:
The median onset of irAEs incidence was 42 days, and categorization of irAEs identified 5 cases of interstitial pneumonia (7%), 5 cases of infusion reactions (7%), 22 cases of skin reactions (31%), 4 cases of neuromuscular disorders (6%), 7 cases of thyroid dysfunction (10%), and 1 case of hepatitis (1%). The following were observed: patient background (IrAEs / Non-irAEs group) number of cases 29/41 cases, median age both 68 years old, male 93% / 83%, treatment response CR/PR/SD/PD (0/17/10/2)/ (1/2/12/26), ORR 59% (17 cases) / 7% (3 cases) [Odds ratio: 0.06, p <.001], DCR 93% (27 cases) /37%(15 cases) [Odds ratio: 0.04, p＜.001], Median PFS (months) NR/3.0 [HR (95% CI) 0.15 (0.06–0.39), p =0.001], Median OS (months) NR/10.8 [HR (95% CI) 0.31 (0.10–0.93), p=0.0275], treatment continuation rate 69% (20 cases)/34% (14 cases) [Odds ratio: 0.24, p = 0.014]. The number of subjects in the responder group was 20 and that in the non-responder group is 50. Univariate analysis identified a significantly higher occurrence of irAEs in the responder group than in the non-responder group as well as the number of patients with higher positivity of anti-thyroid-antibody. Upon multivariate analysis, the development of irAEs [Odds ratio: 0.05, p <.001] and the positivity of anti-thyroid antibody [Odds ratio: 0.16, 0.022] were identified as independent predictors of treatment response.
Conclusion:
The development of irAEs during nivolumab monotherapy for NSCLC may be strongly correlated with improved outcomes. The development of irAEs and the positivity of anti-thyroid antibody were independent predictors of treatment efficacy.
