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L.V. Sequist



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    MINI 03 - PD1 Axis Inhibition and EGFR (ID 101)

    • Event: WCLC 2015
    • Type: Mini Oral
    • Track: Treatment of Advanced Diseases - NSCLC
    • Presentations: 1
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      MINI03.10 - Rociletinib in NSCLC Patients with Negative Central Testing for T790M in TIGER-X (ID 951)

      16:45 - 18:15  |  Author(s): L.V. Sequist

      • Abstract
      • Presentation
      • Slides

      Background:
      Rociletinib (CO-1686) is a novel, oral, irreversible tyrosine kinase inhibitor for the treatment of patients with mutant epidermal growth factor receptor (EGFR) non-small cell lung cancer (NSCLC). Rociletinib has demonstrated efficacy against activating mutations (L858R and Del19) and the dominant acquired resistance mutation (T790M), while sparing wild-type EGFR. New insights into mutEGFR NSCLC suggest clonal heterogeneity – activating EGFR mutations are truncal (present in all tumor clones) and T790M is a dominant branch mutation with variable clonal frequency between patients and over time. The extent of this clonal heterogeneity may relate to rociletinib efficacy. Here we present preliminary findings to evaluate this hypothesis from an ongoing Phase 1/2 clinical trial.

      Methods:
      TIGER-X (NCT01526928) is a Phase I/II open-label, safety, pharmacokinetics and preliminary efficacy study of rociletinib in patients with metastatic or unresectable locally advanced EGFR mutation-positive NSCLC with progressive disease after ≥1 EGFR tyrosine kinase inhibitor (TKI). Screening included mandatory tumor biopsy and T790M testing. For Phase 1, patients could be T790M negative, positive or unknown. For Phase 2, T790M negative patients (by validated central testing) could have a contemporaneous local T790M+ result.

      Results:
      As of March 2015, 36 patients were enrolled in TIGER-X who were T790M central negative by cobas® or Qiagen therascreen® and evaluable for efficacy. Sensitivity analysis indicated that the 2 assay platforms were comparable for T790M detection. 69% (25/36) were T790M negative centrally but positive locally; 4/36 (11%) were negative by both central and local testing; and 7/36 (19%) were centrally negative with no local result. Median number of previous TKIs was 1 and median number of previous therapies was 2; 81% (29/36) were treated with a TKI as their most recent prior therapy. In central negative/local+ patients the ORR was 40% (10/25). In central negative/local negative patients the ORR was 25% (1/4). The most common treatment emergent adverse events in this subset (all grades) were fatigue, diarrhea, nausea and hyperglycemia.

      Conclusion:
      These preliminary findings suggest that patients who test negative for T790M using a sensitive tissue test may still benefit from treatment with rociletinib. In part, this clinical activity may be driven by T790M tumor heterogeneity, demonstrated by the discordant T790M results described. In addition, inhibition of IGF-1R/IR by the previously reported (Soria 2014) rociletinib metabolite M502 may also be driving some of the activity observed. This possible explanation is important, since the response rates reported herein are higher than described for other T790M inhibitors in T790M-negative patients. Furthermore, TKI re-treatment effect is unlikely to be a major driver of these results, since the majority of patients came on study directly after progression on another EGFR TKI. To further explore these findings, the open-label TIGER-2 (NCT02147990) and the randomized Phase 3 TIGER-3 (NCT02322281) studies include T790M negative patients.

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    MINI 09 - Drug Resistance (ID 107)

    • Event: WCLC 2015
    • Type: Mini Oral
    • Track: Biology, Pathology, and Molecular Testing
    • Presentations: 1
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      MINI09.06 - Oncogenic Drivers including RET and ROS1 plus PTEN Loss and MET by IHC in Patients with Lung Adenocarcinomas: Lung Cancer Mutation Consortium 2.0 (ID 2114)

      16:45 - 18:15  |  Author(s): L.V. Sequist

      • Abstract
      • Presentation
      • Slides

      Background:
      The Lung Cancer Mutation Consortium (LCMC) 1.0 demonstrated multiplexed genomic platforms can assay 10 oncogenic drivers in tumor specimens from patients with lung adenocarcinomas. 28% of the patients with oncogenic drivers could be effectively targeted. The survival of these 275 patients treated with targeted agents was longer than the patients who were not treated with a targeted agent (Kris and Johnson JAMA 2014). The efficiency of Next-Generation Sequencing enables more comprehensive testing of additional aberrations with less tumor tissue. LCMC 2.0 was initiated to test tumor specimens for 12 oncogenic drivers and to provide the results to clinicians for treatment decisions and research purposes.

      Methods:
      The 16 site LCMC 2.0 is testing tumors from 1000 patients with lung adenocarcinomas in CLIA laboratories for mutations in KRAS, EGFR, HER2, BRAF, PIK3CA, AKT1, and NRAS, MET DNA amplification, and rearrangements in ALK as done in LCMC 1.0. The new genes that were added because of emerging information about potential therapeutic targets include MAP2K1 mutations, RET and ROS1 rearrangements, PTEN (MAb 138G4) loss and MET (MAb SP44) overexpression by immunohistochemistry (IHC). All patients were diagnosed with stage IIIB/IV lung adenocarcinoma after May 2012, had a performance status 0-2, and available tumor tissue.

      Results:
      Of 1073 patients registered, data is now reported for 759. The median age of the patients is 65 (23-90). The population includes 369 (55%) women; 164 (24%) never smokers, 399 (59%) former smokers, and 73 (11%) current smokers; 26 (4%) Asians, 58 (9%) African American, 548 (81%) Caucasian, and 43 (6%) of other races. As of April 2015 information on genomic and immunohistochemical changes for 675 eligible patients were recorded in our database. Alterations in oncogenic drivers were found in 45% of samples as follows: 159 KRAS (24%), 88 EGFR (13%), 25 ALK (4%), 19 BRAF (3%), 17 PIK3CA (3%), 9 HER2 (1%), 4 NRAS (1%) 0 AKT1, 28 had ≥ 2 findings (4%) and 25 MET DNA amplification (4%). The new genes studied in LCMC 2.0 revealed 1 MAP2K1 mutation (<1%), 19 RET (3%) and 9 ROS (1%) rearrangements, 94 had PTEN loss (14%), and 362 with MET overexpression (54%). As expected, PIK3CA mutations and PTEN loss by IHC were mutually exclusive in 109 of 111 (98%) patients’ tumors. Seventeen of the 23 (74%) with MET DNA amplification studied thus far with IHC had MET overexpression. Next-Generation platforms were used at 13 of 16 LCMC 2.0 sites.

      Conclusion:
      Next-Generation Sequencing is rapidly becoming routine practice at LCMC 2.0 centers with use going from 0 to 81% of sites since 2012. LCMC 2.0 identified additional targets (RET and ROS1 rearrangements and PTEN loss). PIK3CA and PTEN were largely mutually exclusive and an actionable oncogenic driver has been identified in the 45% of initial lung adenocarcinoma specimens. Supported by Free to Breathe

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    MINI 16 - EGFR Mutant Lung Cancer 2 (ID 130)

    • Event: WCLC 2015
    • Type: Mini Oral
    • Track: Treatment of Advanced Diseases - NSCLC
    • Presentations: 3
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      MINI16.03 - Dose Optimization of Rociletinib for EGFR Mutated NSCLC (ID 967)

      16:45 - 18:15  |  Author(s): L.V. Sequist

      • Abstract
      • Presentation
      • Slides

      Background:
      Rociletinib (CO-1686) is a novel, oral, irreversible mutant selective tyrosine kinase inhibitor for the treatment of patients with mutant epidermal growth factor receptor (EGFR) non-small cell lung cancer (NSCLC). Rociletinib has demonstrated efficacy against activating mutations (L858R and Del19) and the dominant acquired resistance mutation (T790M), while sparing wild-type EGFR. A maximum tolerated dose was not identified in Phase 1 with 1000 mg BID the highest dose studied. Here we assess the efficacy and safety of the three doses of rociletinib (500 mg BID, 625 mg BID and 750 mg BID) selected for Phase 2 study.

      Methods:
      TIGER-X (NCT01526928) is a Phase 1/2 open-label, safety, pharmacokinetics and preliminary efficacy study of rociletinib in patients with advanced EGFR mutant NSCLC progressing after ≥1 EGFR tyrosine kinase inhibitor (TKI). Efficacy is assessed using RECIST. Safety is evaluated using standard adverse event (AE) reporting.

      Results:
      As of April 2015, a total of 231 central T790M positive patients were evaluable for efficacy and 343 for safety (any T790M). All patients were enrolled in the USA (85%), Europe (9%) and Australia (6%). Baseline characteristics were similar in each dose group. The median number of prior therapies was 2. 85% had EGFR TKI as their most recent prior therapy and 10% had a history of diabetes/hyperglycemia. Immature ORRs are 53% (500 mg BID), 52% (625 mg BID) and 43% (750 mg BID), with disease control rates of 89% (500 mg BID), 87% (625 mg BID) and 82% (750 mg BID). The most common ≥grade 3 treatment-related AE was hyperglycemia [16% (500 mg BID), 25% (625 mg BID) and 35% (750 mg BID)] which was managed with oral hypoglycemic agents. Only one patient discontinued the study for hyperglycemia. Grade 3 QTc prolongation was uncommon, occurring in 2% (500 mg BID), 7% (625 mg BID) and 10% (750 mg BID) of patients, and demonstrated a relationship to dose. There were no clinically relevant cutaneous toxicities with 7 cases of grade 1 rash and 4 cases of grade 1 stomatitis (no dose relationship) and no paronychia.

      Conclusion:
      All 3 Phase 2 doses of rociletinib are active and well tolerated in a Western patient population with advanced NSCLC. The lack of cutaneous toxicities confirms the selectivity of rociletinib for mutant forms of EGFR and is an important contributor to QOL and maintaining dose intensity (Lacouture et al. 2011). Overall, the adverse event frequency appears to be related to dose, but antitumor activity does not, thus the risk/benefit profile may be optimal at the lowest dose studied.

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      MINI16.04 - Activity of Rociletinib in EGFR Mutant NSCLC Patients with a History of CNS Involvement (ID 965)

      16:45 - 18:15  |  Author(s): L.V. Sequist

      • Abstract
      • Presentation
      • Slides

      Background:
      Rociletinib (CO-1686) is a novel, oral, irreversible tyrosine kinase inhibitor for the treatment of patients with mutant epidermal growth factor receptor (EGFR) non-small cell lung cancer (NSCLC) with activity against the activating mutations (L858R and Del19) and the dominant acquired resistance mutation (T790M), while sparing wild-type EGFR. TIGER-X (NCT01526928) is a Phase I/II open-label, safety, pharmacokinetics and preliminary efficacy study of rociletinib in patients with advanced EGFR mutation-positive NSCLC with progressive disease after ≥1 EGFR tyrosine kinase inhibitor (TKI). An overall response rate of 67% has previously been reported in this trial for T790M positive patients treated with the 500 and 625 mg BID doses (Soria 2014). Here we provide preliminary data on the activity of rociletinib in the subgroup of patients with a history of CNS disease.

      Methods:
      Patients with a history of CNS disease were permitted if asymptomatic and stable, as defined by steroid requirements. The primary activity endpoint was RECIST overall response rate. However, patients who developed progressive disease (PD) while on study treatment were allowed to continue therapy with rociletinib if deemed clinically beneficial by the investigator.

      Results:
      As of 16 March 2015, a total of 401 patients received therapeutic dose levels of rociletinib (500, 625 and 750 mg BID) including 170 (42%) patients with a history of CNS metastases. Based on this interim analysis, the RECIST overall response rate among these patients with a history of CNS disease is 41%. To date, 42 patients with a history of CNS disease have continued therapy with rociletinib post-progression. Of those who continued for at least 14 days the average treatment duration beyond PD was 89 days (range: 14 - 336 days). Twenty-two of the 42 patients with a history of CNS disease with PD also received brain radiation and continued rociletinib treatment for an average of 120 days (range: 22 – 336 days) after PD. Rociletinib is held on radiation days only. Progression-free survival data for these subgroups is not yet mature. The three most common adverse events in the patient population with a history of CNS disease are similar to those found in the general TIGER-X patient population: hyperglycemia, diarrhea and nausea.

      Conclusion:
      In patients with a history of CNS disease, a factor associated with poor prognosis, rociletinib is active with a RECIST response rate of 41%. Local CNS radiation has been administered safely with rociletinib held on radiation days and continued afterwards. Prolonged use of rociletinib post CNS radiation suggests ongoing systemic benefit is still experienced by these patients. The role of rociletinib in NSCLC patients with CNS involvement is being further explored in the ongoing TIGER clinical development program.

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      MINI16.06 - AZD9291 in Pre-Treated T790M Positive Advanced NSCLC: AURA Study Phase II Extension Cohort (ID 943)

      16:45 - 18:15  |  Author(s): L.V. Sequist

      • Abstract
      • Presentation
      • Slides

      Background:
      AZD9291 is an oral, potent, irreversible epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI), selective for both EGFR-TKI-sensitizing (EGFRm) and T790M resistance mutations. The Phase I AURA study was a dose escalation/expansion study in patients with EGFRm positive advanced non-small cell lung cancer (NSCLC) who had progressed after EGFR‑TKI treatment. The 80 mg once daily (qd) dose was chosen for further evaluation in a Phase II extension cohort of the AURA study, and in an additional Phase II study (AURA2). Here we report efficacy and safety of AZD9291 from the AURA study Phase II extension cohort (NCT01802632) in patients pre-treated with EGFR-TKI and with centrally confirmed T790M positive advanced NSCLC.

      Methods:
      Eligible patients had measurable disease, World Health Organization performance status (WHO PS) 0 or 1, and acceptable organ function; stable brain metastases were allowed. A mandatory tumor sample was taken after disease progression on the most recent line of therapy, for prospective confirmation of T790M positive status by central laboratory testing (cobas™ EGFR Mutation Test). Patients received AZD9291 at 80 mg qd until disease progression. The primary endpoint was objective response rate (ORR) according to RECIST 1.1 (assessed by independent central review, ICR). Secondary objectives included disease control rate (DCR), duration of response (DoR), progression-free survival (PFS), investigator-assessed ORR, and safety. Planned enrollment was 175 patients to give an estimate of the ORR with 95% CI within ±8%. Data cut-off was January 9, 2015 after all patients should have undergone the second tumor assessment.

      Results:
      201 patients were dosed in the extension cohort of the study; two patients without measurable disease at baseline by ICR were excluded from the evaluable-for-response set. By central testing, EGFR mutation subtypes were: T790M, 98%; Ex19del, 71%; L858R, 25%; other, 3%. Median age was 62 years; female, 66%; Asian, 57%; WHO PS 0/1/2, 34%/66%/1%; second/≥third-line, 30%/70%. At the data cut-off, median treatment exposure was 4.9 months and 168 patients remain on treatment. ORR by ICR was 58% (115/199; 95% CI 51, 65) and DCR was 92% (95% CI 87, 95). ORRs were similar across lines of therapy (second-line, 59.0% [36/61] vs ≥third-line, 57.2% [79/138]). Investigator-assessed ORR was 68% (137/201; 95% CI 61, 75). Median DoR and median PFS have not been reached (maturity 2% and 21%, respectively). The most common all-causality adverse events (AEs) were diarrhea, 41% (0.5% Gr≥3) and grouped rash terms 37% (0.5% Gr≥3); 42 (21%) patients experienced Gr≥3 AEs. Interstitial lung disease grouped terms were reported in five (2.5%) patients, one of which was fatal (0.5%) and considered possibly causally related to AZD9291 by the investigator. Eight patients (4%) discontinued treatment due to an AE. Updated results from a later data cut-off will be available for presentation.

      Conclusion:
      In the AURA study Phase II extension cohort, AZD9291 80 mg qd demonstrates clinical activity, manageable tolerability, and a low discontinuation rate in patients with centrally confirmed EGFR T790M positive advanced NSCLC that has progressed on or after EGFR‑TKI treatment. These data provide further validation of the results from the Phase I study cohorts.

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    MINI 30 - New Kinase Targets (ID 157)

    • Event: WCLC 2015
    • Type: Mini Oral
    • Track: Treatment of Advanced Diseases - NSCLC
    • Presentations: 1
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      MINI30.06 - Activity of AUY922 in NSCLC Patients With EGFR Exon 20 Insertions (ID 1744)

      18:30 - 20:00  |  Author(s): L.V. Sequist

      • Abstract
      • Presentation
      • Slides

      Background:
      EGFR exon 20 insertions (ins20) represent a rare subtype (4%) of EGFR mutations and are refractory to EGFR-specific tyrosine kinase inhibitors (TKIs). No effective targeted therapies exist for patients (pts) with ins20; median PFS on the irreversible EGFR TKI Afatinib is 2.8 months (mos). Based on a durable RECIST partial response (PR) to AUY922, a Heat Shock Protein 90 (Hsp90) inhibitor, observed in an EGFR ins20 patient in a previous study (NCT01124864), we designed a phase II investigator-initiated trial to assess the activity of AUY922 in NSCLC pts with EGFR ins20. Since pts with these mutations are rare, we identified other international investigators who have treated ins20 patients with AUY922. Here, we present the results of a pooled international experience of 21 patients with EGFR ins20 treated with AUY922 in the United States, Taiwan and the Netherlands.

      Methods:
      A total of 21 patients with EGFR in20 are included in this analysis. 14 were treated on a single-arm, multi-center, open-label study of AUY922 in advanced NSCLC pts with EGFR ins20 mutations in the US (NCT01854034). Five were treated on a multicenter Taiwanese trial of AUY922 across a variety of molecular NSCLC subtypes (NCT01922583) and two were treated on a compassionate-use basis in the Netherlands. The starting dose of AUY922 was 70mg/m2 IV weekly for all patients.

      Results:
      21 pts, including 14 females and 7 males, average age 55 (range, 27-75) were included in this analysis. The median number of prior therapies was 2 (range, 1-6.) 6 pts received a prior EGFR TKI; none responded to TKI monotherapy. The most common AUY922-related toxicities were grade 1-2 visual changes (18/21; 86%) diarrhea (18/21; 86%) and fatigue (15/21; 71%). The only treatment-related grade 3 toxicities was hypertension (2/21; 1%) and AST elevation (1/21; 0.5%). There was one death on study, related to pre-existing comorbidity/unrelated to AUY922. Among the 21 patients treated, 5 achieved a partial response by RECIST 1.1 (ORR 24%) (Figure 1.) The median PFS estimate is 3.9 mos (95% CI, 2.9 to 10.7.) 6 patients remain on treatment at the time of abstract submission. Updated results and correlation with specific ins20 mutations will be presented. Figure 1



      Conclusion:
      This international experience suggests that AUY922 may be an active therapy for advanced NSCLC pts with EGFR ins20 mutations with an ORR 24% and median PFS 3.9 mo. AUY922 is generally well-tolerated, though reversible low-grade ocular toxicity is common. Further study of AUY922 in this population is warranted.

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    ORAL 17 - EGFR Mutant Lung Cancer (ID 116)

    • Event: WCLC 2015
    • Type: Oral Session
    • Track: Treatment of Advanced Diseases - NSCLC
    • Presentations: 1
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      ORAL17.04 - Discussant for ORAL17.01, ORAL17.02, ORAL17.03 (ID 3333)

      10:45 - 12:15  |  Author(s): L.V. Sequist

      • Abstract
      • Presentation

      Abstract not provided

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    P1.01 - Poster Session/ Treatment of Advanced Diseases – NSCLC (ID 206)

    • Event: WCLC 2015
    • Type: Poster
    • Track: Treatment of Advanced Diseases - NSCLC
    • Presentations: 1
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      P1.01-079 - Pembrolizumab Plus Chemotherapy vs Chemotherapy Alone as First-Line Therapy for NSCLC (ID 2993)

      09:30 - 17:00  |  Author(s): L.V. Sequist

      • Abstract
      • Slides

      Background:
      Platinum doublet chemotherapy with or without bevacizumab is the standard first-line therapy for patients with advanced NSCLC without EGFR sensitizing mutations or ALK rearrangement. Pembrolizumab (MK-3475), a humanized monoclonal antibody against PD-1 designed to block the interaction of PD-1 with its ligands PD-L1 and PD-L2, has shown efficacy and a manageable toxicity profile in patients with NSCLC treated at doses ranging from 2 mg/kg every 3 weeks to 10 mg/kg every 2 weeks. In 45 patients with treatment-naive advanced NSCLC treated in KEYNOTE-001, single-agent pembrolizumab has demonstrated a response rate of 26%.

      Methods:
      KEYNOTE-021 (ClinicalTrials.gov, NCT02039674) is an international, open-label, multi-arm, phase 1/2 trial of pembrolizumab for advanced NSCLC. After establishing the safety and tolerability of pembrolizumab plus carboplatin and pemetrexed in phase 1, a randomized phase 2 cohort comparing the efficacy of pembrolizumab plus carboplatin and pemetrexed with that of carboplatin and pemetrexed has been initiated. Key eligibility criteria for this cohort are previously untreated stage IIIB/IV nonsquamous NSCLC, no sensitizing EGFR mutation or ALK rearrangement, and ECOG PS 0-1. Patients will be randomly assigned in a 1:1 ratio to receive pembrolizumab 200 mg Q3W plus carboplatin and pemetrexed at standard doses or carboplatin and pemetrexed alone. Randomization will be stratified by PD-L1 expression determined by immunohistochemistry at a central laboratory (positive [membranous expression in ≥1% of tumor cells] vs negative). Pembrolizumab will be given for 24 months or until progression, intolerable toxicity, or investigator decision. Pembrolizumab may be continued beyond radiographic progression in eligible patients. Carboplatin and pemetrexed will be given for 4 cycles followed by maintenance pemetrexed, alone or with pembrolizumab. Patients allocated to the chemotherapy-alone arm who experience progression may cross over to the pembrolizumab arm of the study. AEs will be monitored throughout treatment and for 30 days thereafter. Response will be assessed every 6 weeks for the first 18 weeks, then every 9 weeks in year 1 and every 12 weeks in year 2. Survival follow-up will occur every 3 months after discontinuation of study treatment. Primary end point is progression-free survival (RECIST v1.1, central review); secondary end points include overall survival, objective response rate, and correlation of PD-L1 expression with antitumor activity. This cohort is currently enrolling patients.

      Results:
      Not applicable.

      Conclusion:
      Not applicable.

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    PC 02 - Pro vs Con: Is There a Role for EGFR TKIs in EGFR Mutation Negative Disease? / Pro vs Con: Whole Exome Sequencing vs. Selected Testing (e.g., ALK and EGFR) (ID 48)

    • Event: WCLC 2015
    • Type: Pro Con
    • Track: Treatment of Advanced Diseases - NSCLC
    • Presentations: 1
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      PC02.02 - Is There a Role for EGFR TKIs in EGFR Mutation Negative Disease? - Con (ID 2031)

      14:15 - 15:45  |  Author(s): L.V. Sequist

      • Abstract
      • Presentation

      Abstract not provided

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