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Ref Type Journal Article
PMID (27225694)
Authors Gainor JF, Shaw AT, Sequist LV, Fu X, Azzoli CG, Piotrowska Z, Huynh TG, Zhao L, Fulton L, Schultz KR, Howe E, Farago AF, Sullivan RJ, Stone JR, Digumarthy S, Moran T, Hata AN, Yagi Y, Yeap BY, Engelman JA, Mino-Kenudson M
Title EGFR Mutations and ALK Rearrangements Are Associated with Low Response Rates to PD-1 Pathway Blockade in Non-Small Cell Lung Cancer: A Retrospective Analysis.
Journal Vol Issue Date Pages Journal Short Title
Clinical cancer research : an official journal of the American Association for Cancer Research 22 18 2016 Sep 15 4585-93 Clin Cancer Res
URL
Abstract Text PD-1 inhibitors are established agents in the management of non-small cell lung cancer (NSCLC); however, only a subset of patients derives clinical benefit. To determine the activity of PD-1/PD-L1 inhibitors within clinically relevant molecular subgroups, we retrospectively evaluated response patterns among EGFR-mutant, anaplastic lymphoma kinase (ALK)-positive, and EGFR wild-type/ALK-negative patients.We identified 58 patients treated with PD-1/PD-L1 inhibitors. Objective response rates (ORR) were assessed using RECIST v1.1. PD-L1 expression and CD8(+) tumor-infiltrating lymphocytes (TIL) were evaluated by IHC.Objective responses were observed in 1 of 28 (3.6%) EGFR-mutant or ALK-positive patients versus 7 of 30 (23.3%) EGFR wild-type and ALK-negative/unknown patients (P = 0.053). The ORR among never- or light- (≤10 pack years) smokers was 4.2% versus 20.6% among heavy smokers (P = 0.123). In an independent cohort of advanced EGFR-mutant (N = 68) and ALK-positive (N = 27) patients, PD-L1 expression was observed in 24%/16%/11% and 63%/47%/26% of pre-tyrosine kinase inhibitor (TKI) biopsies using cutoffs of ≥1%, ≥5%, and ≥50% tumor cell staining, respectively. Among EGFR-mutant patients with paired, pre- and post-TKI-resistant biopsies (N = 57), PD-L1 expression levels changed after resistance in 16 (28%) patients. Concurrent PD-L1 expression (≥5%) and high levels of CD8(+) TILs (grade ≥2) were observed in only 1 pretreatment (2.1%) and 5 resistant (11.6%) EGFR-mutant specimens and was not observed in any ALK-positive, pre- or post-TKI specimens.NSCLCs harboring EGFR mutations or ALK rearrangements are associated with low ORRs to PD-1/PD-L1 inhibitors. Low rates of concurrent PD-L1 expression and CD8(+) TILs within the tumor microenvironment may underlie these clinical observations. Clin Cancer Res; 22(18); 4585-93. ©2016 AACRSee related commentary by Gettinger and Politi, p. 4539.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
ALK rearrange lung non-small cell carcinoma no benefit Nivolumab Clinical Study - Cohort Actionable In a retrospective analysis, PD-1/PD-L1 inhibitors (Opdivo (nivolumab), Keytruda (pembrolizumab), Durvalumab (MEDI4736), or Tecentriq (atezolizumab)) resulted in lower objective response rate (3.6%, 1/28) in non-small cell lung cancer patients harboring EGFR mutations (22/28) or ALK rearrangement (6/28) compared to EGFR wild-type, ALK negative/unknown patients (23.3%, 7/30) (PMID: 27225694). 27225694
ALK rearrange lung non-small cell carcinoma no benefit Atezolizumab Clinical Study - Cohort Actionable In a retrospective analysis, PD-1/PD-L1 inhibitors (Opdivo (nivolumab), Keytruda (pembrolizumab), Durvalumab (MEDI4736), or Tecentriq (atezolizumab)) resulted in lower objective response rate (3.6%, 1/28) in non-small cell lung cancer patients harboring EGFR mutations (22/28) or ALK rearrangement (6/28) compared to EGFR wild-type, ALK negative/unknown patients (23.3%, 7/30) (PMID: 27225694). 27225694
ALK rearrange lung non-small cell carcinoma no benefit Pembrolizumab Clinical Study - Cohort Actionable In a retrospective analysis, PD-1/PD-L1 inhibitors (Opdivo (nivolumab), Keytruda (pembrolizumab), Durvalumab (MEDI4736), or Tecentriq (atezolizumab)) resulted in lower objective response rate (3.6%, 1/28) in non-small cell lung cancer patients harboring EGFR mutations (22/28) or ALK rearrangement (6/28) compared to EGFR wild-type, ALK negative/unknown patients (23.3%, 7/30) (PMID: 27225694). 27225694
ALK rearrange lung non-small cell carcinoma no benefit Durvalumab Clinical Study - Cohort Actionable In a retrospective analysis, PD-1/PD-L1 inhibitors (Opdivo (nivolumab), Keytruda (pembrolizumab), Imfinzi (durvalumab), or Tecentriq (atezolizumab)) resulted in lower objective response rate (3.6%, 1/28) in non-small cell lung cancer patients harboring EGFR mutations (22/28) or ALK rearrangement (6/28) compared to EGFR wild-type, ALK negative/unknown patients (23.3%, 7/30) (PMID: 27225694). 27225694