Abstract:
BACKGROUND:Immune checkpoint inhibitors (ICIs) have emerged as promising therapeutic agents in non-small cell lung cancer (NSCLC). However, the duration for which ICIs should be continued remains a clinical problem. METHODS:We examined the efficacy of anti-PD-1/PD-L1 inhibitors after the discontinuation of antibodies due to adverse events (AEs) in patients with NSCLC. This was a multicenter retrospective study that analyzed NSCLC patients who were treated with PD-1/PD-L1 inhibitors by August 2016. RESULTS:The patients with NSCLC were 18 males and 1 female at a median 67 years of age (range: 49-80 years). Eighteen of 19 patients were treated with nivolumab, one was with atezolizumab. Approximately half of AEs were interstitial pneumonia. Fourteen patients (73.7%) were treated with steroid therapy. The median number of treatment cycles was 7 (range, 1-70), and the median duration of treatment was 2.8 months (range, 1 day-32.9 months). The overall response rate with confirmation during treatment was 21.1%. The median progression-free survival (PFS) was 10.2 months (95% confidence interval [CI] = 3.2-17.1 months) and 5.6 months (95% CI = 0-12.2 months) from the initiation and the discontinuation of PD-1/PD-L1 treatment, respectively. The median PFS after discontinuation according to the confirmed response during administration was not reached for partial response (PR) and 4.9 months (95% CI, 3.7-6.0) for stable disease (SD) patients (P = 0.02). CONCLUSION:The PFS of the PR patients was completely different from that of the SD patients. The cases with PR prior to the onset of AE tended to show a durable response after the discontinuation of PD-1/PD-L1 inhibitors.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Tachihara M,Negoro S,Inoue T,Tamiya M,Akazawa Y,Uenami T,Urata Y,Hattori Y,Hata A,Katakami N,Yokota Sdoi
10.1186/s12885-018-4819-2subject
Has Abstractpub_date
2018-10-03 00:00:00pages
946issue
1issn
1471-2407pii
10.1186/s12885-018-4819-2journal_volume
18pub_type
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