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Scott J. Antonia



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    ESMO-IASLC Best Abstracts (ID 62)

    • Event: ELCC 2019
    • Type: Proffered Paper session
    • Track:
    • Presentations: 1
    • Moderators:
    • Coordinates: 4/11/2019, 14:45 - 16:15, Room B
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      LBA3 - Efficacy and safety of first-line durvalumab (D) ± tremelimumab (T) vs platinum-based chemotherapy (CT) based on clinical characteristics in patients with metastatic (m) NSCLC: Results from MYSTIC (ID 376)

      14:45 - 16:15  |  Author(s): Scott J. Antonia

      • Abstract
      • Presentation
      • Slides

      Background

      In MYSTIC (NCT02453282), an open-label, Phase 3 trial of first-line D (anti-PD-L1) ± T (anti-CTLA-4) vs CT in mNSCLC, while not statistically significant, a clinically meaningful improvement in overall survival (OS) was seen with D vs CT in pts with tumour cell PD-L1 expression ≥25% (TC ≥25% [primary analysis population]; D vs CT, HR 0.76 [97.54% CI 0.56–1.02], p=0.036; D+T vs CT, HR 0.85 [98.77% CI 0.61–1.17], p=0.202). Here we report OS in clinically relevant pt subgroups and safety results from MYSTIC.

      a9ded1e5ce5d75814730bb4caaf49419 Methods

      Immunotherapy/CT-naïve pts with mNSCLC were randomised (1:1:1) to D (20 mg/kg q4w); D (20 mg/kg q4w) + T (1 mg/kg q4w for 4 cycles); or CT. OS was analysed in pt subgroups based on baseline clinical characteristics in the PD-L1 TC ≥25% population (prespecified: age, gender, race, histology, smoking history and immune cell [IC] PD-L1 expression ≥25% vs <25%; post hoc: ECOG performance status). Safety (CTCAE v4.03) and tolerability were evaluated in all treated pts.

      20c51b5f4e9aeb5334c90ff072e6f928 Results

      The subgroup analysis included 488 pts (D, 163; D+T, 163; CT, 162). Baseline characteristics were balanced between treatment groups. Treatment with D±T resulted in numerical improvement in OS vs CT in most clinical subgroups. OS in pts aged ≥65 y, PD-L1 IC ≥25%, and performance status 0 showed a HR (95% CI) of 0.66 (0.45, 0.95), 0.63 (0.38, 1.04), and 0.54 (0.34, 0.84), respectively, with D vs CT and a HR (95% CI) of 0.72 (0.50, 1.02), 0.64 (0.39, 1.05), and 0.76 (0.50, 1.14) with D+T vs CT. Rates of TRAEs leading to discontinuation and imAEs were highest with D+T and rates of Grade ≥3 TRAEs were highest with CT (Table).

      D (n=369)D+T (n=371)CT (n=352)
      Any TRAE leading to discontinuation (PT), n (%)20 (5.4)49 (13.2)33 (9.4)
      →Pneumonitis3 (0.8)7 (1.9)1 (0.3)
      →Interstitial lung disease2 (0.5)5 (1.3)1 (0.3)
      →Blood creatinine increased01 (0.3)4 (1.1)
      →Colitis05 (1.3)0
      →Diarrhoea04 (1.1)1 (0.3)
      Any Grade ≥3 TRAE (PT), n (%)55 (14.9)85 (22.9)119 (33.8)
      →Anaemia0036 (10.2)
      →Neutropenia1 (0.3)035 (9.9)
      →Fatigue6 (1.6)8 (2.2)7 (2.0)
      →Thrombocytopenia0018 (5.1)
      →Lipase increased3 (0.8)13 (3.5)1 (0.3)
      Any imAE (grouped term), n (%)50 (13.6)105 (28.3)12 (3.4)
      →Hypothyroidism21 (5.7)28 (7.5)2 (0.6)
      →Pneumonitis8 (2.2)25 (6.7)5 (1.4)
      →Diarrhoea7 (1.9)17 (4.6)1 (0.3)
      →Rash5 (1.4)16 (4.3)2 (0.6)
      →Colitis2 (0.5)12 (3.2)0

      5 most common events in each category listed in descending order of frequency across the 3 treatment arms. PT, preferred term; TRAE, treatment-related AE; imAE, immune-mediated AE.

      fd69c5cf902969e6fb71d043085ddee6 Conclusions

      In MYSTIC, results of OS analyses across most pt subgroups showed favourable HRs for D±T vs CT, consistent with the overall primary analysis. The safety profile of D±T was manageable and consistent with previous studies with lower rates of Grade ≥3 TRAEs reported compared to CT.

      b651e8a99c4375feb982b7c2cad376e9 Editorial acknowledgement

      Medical writing support, which was in accordance with Good Publication Practice (GPP3) guidelines, was provided by Samantha Holmes, PhD, of Cirrus Communications (Macclesfield, UK), an Ashfield company, and was funded by AstraZeneca.

      934ce5ff971f1ab29e840a35e3ca96e9 Legal entity responsible for the study

      AstraZeneca PLC.

      213f68309caaa4ccc14d5f99789640ad Funding

      AstraZeneca.

      682889d0a1d3b50267a69346a750433d Disclosure

      B.C. Cho: Grants/research support: Novartis, AstraZeneca, Yuhan, ONO/BMS, MSD, Bayer; Advisor/honoraria fees: AstraZeneca, Roche, Boehringer Ingelheim, Yuhan, BMS, MSD, Novartis; Speaker’s bureau fees: AZ, BMS, MSD, Novartis. N. Reinmuth: Personal fees: BMS, Roche, AstraZeneca, Takeda, Novartis, Boehringer Ingelheim, MSD, Lilly, outside the conduct of the study. A. Smolin: Grants: AstraZeneca; Grants, personal fees: AstraZeneca, Roche, MSD, BMS; Personal fees: BIOCAD, Boehringer Ingelheim. S.J. Antonia: Advisory boards/contracted research: Novartis; Advisory boards: BMS, Merck, CBMG, Boehringer Ingelheim, AstraZeneca, Memgen, FLX Bio, Nektar, Venn. G. Robinet: Grants, personal fees: AstraZeneca, MSD; Personal fees: Boehringer Ingelheim. R. Natale: Spouse employed (Medical Science Liaison): AstraZeneca - However, her salary and compensation is completely unrelated to the contracted research work performed at my institution for which I am a co-investigator. E.B. Garon: Research funding: Merck, Genentech, AstraZeneca, Novartis, Lilly, BMS, Mirati Therapeutics, Dynavax, Iovance Biotherapeutics.  K. Nakagawa: Research funding: GlaxoSmithKline K.K., AstraZeneca K.K., Kyowa Hakko Kirin, Pfizer Japan Inc., AbbVie Inc., Novartis Pharma K.K., Nippon Boehringer Ingelheim, Daiichi Sankyo, Eli Lilly Japan K.K., MSD K.K., Quintiles Inc., Ono Pharmaceutical, BMS, EPS International, Chugai Pharmaceutical, ICON Japan K.K., Gritstone Oncology, Inc., Linical, Yakult Honsha, PAREXEL International Corp., Otsuka Pharmaceutical, Astellas Pharma Inc., AC Medical Inc., Taiho Pharmaceutical, Merck Serono, EPS Associates, Quintiles Inc., Japan Clinical Research Operations, Eisai, PPD-SNBL K.K., Takeda Pharmaceutical, Covance Inc., inVentiv Health Japan, A2 Healthcare Corp., EP-CRSU; Honoraria: Astellas Pharma Inc., AstraZeneca K.K., Novartis Pharma K.K., Pfizer Japan Inc., Chugai Pharmaceutical, Ono Pharmaceutical, Nippon Boehringer Ingelheim, BMS, Kissei Pharmaceutical, Eli Lilly Japan K.K., MSD K.K., EPS Holdings Inc., Showa Yakuhin Kako, Clinical Trial, CareNet, Inc., Nikkei Business Publications, Inc., Nichi-Iko Pharmaceutical, Daiichi Sankyo, Taiho Pharmaceutical, AYUMI Pharmaceutical Corporation, Kyowa Hakko Kirin, Sym Bio Pharmaceuticals, Medicus Shuppan Publishers, Reno Medical K.K., Yodosha, Nanzando; Consulting or advisory role: Astellas Pharma Inc., Eli Lilly Japan K.K., Ono Pharmaceutical, Takeda Pharmaceutical. S. Peters: Personal fees: AbbVie, Amgen, AZ, Bayer, Biocartis, BI, BMS, Clovis, Daiichi Sankyo, Debiopharm, Eli Lilly, F. Hoffmann-La Roche, Foundation Medicine, Illumina, Janssen, MSD, Merck Serono, Merrimack, Novartis, Pharma Mar, Pfizer, Regeneron, Sanofi, Seattle Genetics, Takeda; Non-financial support: Amgen, AZ, BI, BMS, Clovis, F. Hoffmann-La Roche, Illumina, MSD, Merck Serono, Novartis, Pfizer. F. Liu, P. Thiyagarajah: Full-time employment: AstraZeneca. N.A. Rizvi: Advisory boards: AbbVie, AZ, BMS, EMD Serono, Genentech, GSK, Janssen, Lilly, Merck, Novartis, Pfizer, Regeneron, Neogenomics, Oncomed, Gritstone, Bellicum; Equity: Oncomed, Gritstone, Bellicum, ARMO; Royalties: PGDX (patent filed by MSKCC).  All other authors have declared no conflicts of interest.

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    Mini Oral session II (ID 63)

    • Event: ELCC 2019
    • Type: Mini Oral session
    • Track:
    • Presentations: 1
    • Moderators:
    • Coordinates: 4/11/2019, 16:40 - 17:40, Room C
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      85O - Prevalence of programmed death ligand-1 (PD-L1) by demographic, disease and sample characteristics in unresectable, stage III NSCLC (PACIFIC) (ID 305)

      16:40 - 17:40  |  Author(s): Scott J. Antonia

      • Abstract
      • Presentation
      • Slides

      Background

      PACIFIC (NCT02125461) was a randomised, placebo-controlled, phase 3 trial evaluating the immune checkpoint inhibitor durvalumab in patients (pts) with unresectable, Stage III non-small cell lung cancer (NSCLC) who did not have disease progression after concurrent chemoradiotherapy (cCRT). Both primary endpoints of progression-free survival and overall survival were met and significantly improved with durvalumab, with similar safety, versus placebo (Antonia et al, NEJM 2017; 2018). We report exploratory analyses of the prevalence of tumour PD-L1 expression by baseline pt, disease and sample characteristics and by response to prior treatment for pts in PACIFIC.

      a9ded1e5ce5d75814730bb4caaf49419 Methods

      If available (provision of formalin-fixed paraffin-embedded tumour resection or biopsy samples was optional), archived pre-cCRT tumour tissue was tested retrospectively for PD-L1 tumour cell (TC) expression using the VENTANA PD-L1 (SP263) immunohistochemistry assay and scored at validated pre-specified (≥25%) and post-hoc (≥1%) cutoffs. Overall PD-L1 prevalence (regardless of treatment arm) was summarised by pt subgroups defined by various characteristics, and assessed using a Pearson’s chi-squared test for between-group differences.

      20c51b5f4e9aeb5334c90ff072e6f928 Results

      Of 713 randomized pts, 451 (63.2%) were evaluable for PD-L1 status. Among PD-L1-evaluable pts, 67.2% (303/451) had TC ≥ 1% and 35.3% (159/451) had TC ≥ 25% (similar to previous reports in metastatic NSCLC). PD-L1 prevalence by various characteristics at the TC ≥ 1% cut-off are reported in the table.

      fd69c5cf902969e6fb71d043085ddee6 Conclusions

      There were no important differences noted in PD-L1 prevalence between relevant subgroups at the TC ≥ 1% or TC ≥ 25% cut-offs (latter data to be presented). PD-L1 status was unaffected by sample type or age or biopsy location, suggesting expression is stable from pre-cCRT diagnostic biopsies, and supports the use of either primary tumour or lymph node biopsies for PD-L1 testing.

      b651e8a99c4375feb982b7c2cad376e9 Clinical trial identification

      NCT02125461.

      7a6a3ffa2dadc03a6151ee2c4d6fa383 Editorial acknowledgement

      Medical writing support, which was in accordance with Good Publication Practice (GPP3) guidelines, was provided by Andrew Gannon of Cirrus Communications, an Ashfield company, and was funded by AstraZeneca.

      934ce5ff971f1ab29e840a35e3ca96e9 Legal entity responsible for the study

      AstraZeneca.

      213f68309caaa4ccc14d5f99789640ad Funding

      AstraZeneca.

      682889d0a1d3b50267a69346a750433d Disclosure

      D. Planchard: Personal fees: AstraZeneca, Boehringer Ingelheim, BMS, MSD, Pfizer, Novartis, Roche, Celgene, outside the submitted work. M.C. Garassino: Personal fees: AstraZemeca, Roche, BMS, MSD outside the conduct of this study. L. Paz-Ares: Advisory board fees: BMS, Lilly, MSD, AstraZeneca, Roche, Pfizer, Novartis, Incyte, Merk, Boehringer Ingelheim. C. Faivre-Finn: Research funding:AstraZeneca, MSD. A. Spira: Advisory fees, institutional research support: AstraZeneca. Y. Gu, J. Whiteley, M. Scott, J. Walker: Employment, stock: AstraZeneca. C. Wadsworth, P.A. Dennis: Employment, stock: AstraZeneca, outside the conduct of the study. A-M. Boothman: Employment, stock options: AstraZeneca, outside the conduct of the study. M. Ratcliffe: Consultant fees: AstraZeneca, outside the conduct of the study. All other authors have declared no conflicts of interest.

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    Proffered Paper session I (ID 57)

    • Event: ELCC 2019
    • Type: Proffered Paper session
    • Track:
    • Presentations: 1
    • Moderators:
    • Coordinates: 4/10/2019, 16:30 - 18:15, Room C
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      LBA2 - Patient-reported outcomes (PROs) with durvalumab by PD-L1 expression in unresectable, stage III NSCLC (PACIFIC) (ID 308)

      16:30 - 18:15  |  Author(s): Scott J. Antonia

      • Abstract
      • Presentation
      • Slides

      Background

      In the ph 3 PACIFIC study of Stage III NSCLC pts without progression after cCRT, PFS and OS were significantly improved with durva vs. pbo, with no detrimental effect on PROs. We retrospectively investigated the impact of tumour PD-L1 expression on PROs.

      a9ded1e5ce5d75814730bb4caaf49419 Background

      In the phase 3 PACIFIC study of unresectable, Stage III NSCLC pts without progression after platinum-based concurrent chemoradiotherapy (cCRT), the primary endpoints PFS and OS were significantly improved with durvalumab versus placebo with similar safety and no detrimental effect on PROs. We retrospectively investigated the impact of tumour PD-L1 expression on PROs to better understand the benefit/risk profile of durvalumab across all PD-L1 subgroups.

      a9ded1e5ce5d75814730bb4caaf49419 Methods

      After ≥2 cCRT cycles, pts were randomised (2:1) to durva 10 mg/kg or pbo IV q2w up to 12 mo. If available, optional pre-cCRT tumour tissue was tested for PD-L1 tumour cell (TC) expression using the VENTANA SP263 immunohistochemistry assay and scored at pre-specified (25% or unknown) and post-hoc (1%) cutoffs. PROs were assessed using EORTC QLQ-C30 and -LC13 with changes from BL analysed by a mixed model for repeated measures, HRs for time to deterioration (TTD) by a stratified Cox proportional-hazards model, and ORs for improvement rates by logistic regression.

      20c51b5f4e9aeb5334c90ff072e6f928 Methods

      After cCRT with ≥2 chemotherapy cycles, pts were randomised (2:1) to durvalumab 10 mg/kg or placebo IV q2w up to 12 months. If available, optional pre-cCRT tumour tissue was tested for PD-L1 tumour cell (TC) expression using the VENTANA SP263 immunohistochemistry assay and scored at pre-specified (25%) and post-hoc (1%) cutoffs. PROs were assessed using EORTC QLQ-C30 and -LC13 with changes from baseline (BL) analysed by a mixed model for repeated measures, hazard ratios (HRs) for time to deterioration (TTD) by a Cox proportional-hazards model, and odd ratios (ORs) for improvement rates by logistic regression.

      20c51b5f4e9aeb5334c90ff072e6f928 Results

      Of 713 pts, 63% had known PD-L1 status. Compliance was high (>80% at Wk 48) across all five PD-L1 subgroups (TC ≥25%, <25%, ≥1%, <1%, and unknown). Most PROs remained stable; however, similar to the ITT population, clinically relevant improvements from BL to Wk 48 were observed for dysphagia and alopecia across most subgroups (4/5 and 5/5, respectively) for durva (mean changes 10.1−20.9 and 15.5−26.9) and all for pbo (10.4−19.4 and 15.8−31.3); plus improvements with pbo for TC ≥25% (12.5 for chest pain and constipation) and TC <25% (10.0 for appetite loss and arm/shoulder pain). Across most subgroups, there were no TTD differences, except those favouring durva: for TC ≥25%, chest pain (HR=0.57), physical functioning (0.60), emotional functioning (0.47), pain (0.56), and haemoptysis (0.42); and, similar to ITT, for TC ≥25%, <25%, ≥1% and <1%, ‘other pain’ (0.60, 0.57, 0.67 and 0.39, respectively). Improvement rates were also similar, except as follows, favouring durva: for TC ≥25%, role functioning (OR=2.84) and, similar to ITT, appetite loss (4.33); for TC ≥1%, diarrhoea (4.50) and haemoptysis (19.34); and, for TC<1%, ‘other pain’ (7.25); for TC<25%, the rate favoured pbo for cough (0.51).

      fd69c5cf902969e6fb71d043085ddee6 Results

      Of 713 pts, 63% had known PD-L1 status. Similar to the intent-to-treat (ITT) population, most PROs remained stable over time from BL across the PD-L1 subgroups (TC ≥25%, <25%, ≥1%, <1%, or unknown), with no clinically meaningful (CM) differences (≥10 points) for durvalumab compared to placebo. However, similar to the ITT population, CM improvements (decreases ≥10 points) from BL to Week 48 were observed for dysphagia and alopecia across most PD-L1 subgroups for both durvalumab (mean changes 8.1 [not CM]−20.9 and 15.5 − 26.9, respectively) and placebo (mean changes 10.4 − 19.4 and 15.8 − 31.3). Pre-specified and post hoc TTD analyses of PROs by PD-L1 subgroup were generally similar to those of the ITT population, with overlapping HR and 95% CIs. Similarly, PRO improvement rates by PD-L1 subgroup were generally similar to those of the ITT population, with overlapping OR and 95% CIs.

      fd69c5cf902969e6fb71d043085ddee6 Conclusions

      Similar to the ITT population, there were minimal between-Tx differences in PROs based on PD-L1 expression, supporting use of the PACIFIC regimen (durvalumab after cCRT) in all comers.

      b651e8a99c4375feb982b7c2cad376e9 Conclusions

      There were no CM differences in PROs between treatment arms across various PD-L1 subgroups. Results were generally consistent with those in the ITT population, suggesting that PD-L1 expression did not influence PROs in this study.

      b651e8a99c4375feb982b7c2cad376e9 Clinical trial identification

      NCT02125461

      7a6a3ffa2dadc03a6151ee2c4d6fa383 Editorial acknowledgement

      Medical writing support, which was in accordance with Good Publication Practice (GPP3) guidelines, was provided by Hashem Dbouk, PhD, of Cirrus Communications, an Ashfield company, and was funded by AstraZeneca.

      934ce5ff971f1ab29e840a35e3ca96e9 Editorial acknowledgement

      Medical writing support, which was in accordance with Good Publication Practice (GPP3) guidelines, was provided by Andrew Gannon of Cirrus Communications, an Ashfield company, and funded by AstraZeneca.

      934ce5ff971f1ab29e840a35e3ca96e9 Legal entity responsible for the study

      AstraZeneca.

      213f68309caaa4ccc14d5f99789640ad Funding

      AstraZeneca.

      682889d0a1d3b50267a69346a750433d Disclosure

      M.C. Garassino: Personal fees: AstraZeneca, Roche, BMS, MSD. L. Paz-Ares: Advisory fees: BMS, Lilly, MSD, AstraZeneca, Roche, Pfizer, Novartis, Incyte, Merck, Boehringer Ingelheim, outside the conduct of the study. C. Faivre-Finn: Research funding: AstraZeneca, MSD, outside the conduct of the study. A. Spira: Consultant fees, institutional research support: AstraZeneca, outside the conduct of the study. D. Planchard: Personal fees: AstraZeneca, Boehringer Ingelheim, BMS, MSD, Pfizer, Novartis, Roche, Celgene, outside the conduct of the study. M. Ozguroglu: Consultant fees: Astellas; Honoraria: Janssen, outside the conduct of the study. A. Rydén, P.A. Dennis: Employment, stock: AstraZeneca. Y. Zhang, C. O’Brien: Employment, stock: AstraZeneca, outside the conduct of the study. All other authors have declared no conflicts of interest.

      cffcb1a185b2d7d5c44e9dc785b6bb25

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