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A. Shaw



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    MA07 - ALK-ROS1 in Advanced NSCLC (ID 385)

    • Event: WCLC 2016
    • Type: Mini Oral Session
    • Track: Advanced NSCLC
    • Presentations: 2
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      MA07.01 - Updated Pooled Analysis of CNS Endpoints in Two Phase II Studies of Alectinib in ALK+ NSCLC (ID 5354)

      11:00 - 12:30  |  Author(s): A. Shaw

      • Abstract
      • Presentation
      • Slides

      Background:
      Based on two single-arm, multicentre, phase II studies (NP28673 [NCT01801111] and NP28761 [NCT01871805]), the FDA approved the ALK inhibitor alectinib for use in ALK+ NSCLC patients after prior crizotinib. Alectinib was well tolerated in both phase II studies and showed efficacy against both systemic and central nervous system (CNS) disease, the latter being a common progression site in ALK+ NSCLC. This analysis uses pooled data from the latest cut-offs (22 Jan 2016 for NP28761; 1 Feb 2016 for NP28673) to examine the long-term CNS efficacy of alectinib.

      Methods:
      Both studies enrolled crizotinib-refractory patients ≥18 years with ECOG PS 0–2 and locally advanced or metastatic ALK+ NSCLC (confirmed by FDA-approved test). CNS metastases were permitted if asymptomatic. Patients received 600mg oral alectinib BID. The primary endpoint in both studies was objective response rate (ORR) by independent review committee; secondary CNS endpoints included CNS ORR, CNS duration of response (DoR), and CNS disease control rate (DCR). CNS response and progression were determined by RECIST v1.1. All patients had baseline imaging to assess CNS metastases, with further imaging every 6 or 8 weeks for NP28761 and NP28673, respectively.

      Results:
      The overall pooled analysis population comprised 225 patients (n=87 from NP28761; n=138 from NP28673); median follow-up for this updated analysis was 18.8 (0.6–29.7) months (>6 months additional follow-up). At baseline, 50 patients had measurable and 86 had non-measurable CNS disease; together, these groups comprised 136 patients, 60% of the overall pooled population. Seventy percent of patients had prior CNS radiotherapy; 58% of these completed radiotherapy >6 months before study entry. Updated CNS data are shown in the Table and are consistent with systemic results.

      Measurable CNS disease at baseline (n=50) Measurable and non-measurable CNS disease at baseline (n=136)
      CNS ORR, n (%) [95% CI] 32 (64.0) [49.2–77.1] 60* (44.1) [35.6–52.9]
      Complete response (CR), n (%) 11 (22.0) 39* (28.7)
      CNS DCR, n (%) [95% CI] 45 (90.0) [78.2–96.7] 117 (86.0) [79.1–91.4]
      Median CNS DoR, months [95% CI] Patients with event, n (%) 11.1 [7.6–NE] 18 (56.3) 13.8 [11.0–21.5] 32 (53.3)
      * N.B. Non-measurable disease response can only be classified as CR, non-CR/non-progressive disease (PD) or PD


      Conclusion:
      This updated pooled analysis with mature data confirms that alectinib can provide long-term control of CNS metastases in ALK+ NSCLC, with a high CR rate.

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      MA07.02 - Updated Efficacy and Safety Data from the Phase 2 NP28761 Study of Alectinib in ALK-Positive Non-Small-Cell Lung Cancer (ID 4918)

      11:00 - 12:30  |  Author(s): A. Shaw

      • Abstract
      • Presentation
      • Slides

      Background:
      Alectinib, a CNS-active and highly selective ALK inhibitor, has efficacy in patients with ALK-positive NSCLC with and without previous crizotinib treatment. Updated efficacy and safety from the alectinib phase 2 North American NP28761 study (NCT01871805) of patients with ALK-positive NSCLC previously treated with crizotinib, with 15 months’ additional follow-up from the primary analysis and 9 months’ additional follow-up from the previous analysis are presented.

      Methods:
      Patients ≥18 years old with ALK-positive NSCLC (FDA-approved FISH test), disease progression following crizotinib, and ECOG PS ≤2 were enrolled. Patients received oral alectinib (600mg) twice daily until progression, death or withdrawal. Primary endpoint: overall response rate (ORR) by independent review committee (IRC; RECIST v1.1.) Secondary endpoints: investigator-assessed ORR; progression-free survival (PFS); overall survival (OS), CNS ORR (CORR); disease control rate (DCR); safety.

      Results:
      At the updated cut-off (22 January 2016) an additional 15 months' follow-up from the primary analysis, 87 patients were enrolled. Median follow-up: 17.0 months (range 1.1–28.6). ORR in the response evaluable population (REP; n=67) by IRC: 52.2% (95% CI 39.7–64.6), median duration of response: 14.9 months. Median PFS and OS: 8.0 and 22.7 months, respectively. Table 1 presents other efficacy endpoints. Grade ≥3 AEs were reported in 41% of the safety population (n=87); most common: elevated levels of blood creatine phosphokinase (8%), alanine aminotransferase (6%), aspartate aminotransferase (5%). Two patients withdrew due to AEs; 28% had AEs leading to dose modification/interruption. Mean dose intensity was 92.0%.

      IRC REP Responders, n CR, n (%) PR, n (%) SD, n (%) PD, n (%) Missing/NE, n (%) DCR, % (95% CI) n=67[*] 35 0 (0) 35 (52.2) 18 (26.9) 11 (16.4) 3 (4.5) 79.1 (67.4,88.1)
      Investigator REP Responders, n ORR, % (95% CI) n=87 [46[†]] 52.9 (41.9, 63.7)
      Measurable baseline CNS lesions (IRC)‖ Responders, n CORR, % (95% CI) Measurable/non-measurable baseline CNS lesions (IRC) Responders CORR,[‖] % (95% CI) n=16 12[‡] 75.0 (47.6, 92.7) n=52 21[§] 40.4 (27.0, 54.9)
      *n=20 did not have measurable disease per IRC and were not included in the IRC REP; [†]2 CR;[ ‡]4 CR;[ §]13 CR; [‖]non-measurable disease classified as CR, non-CR/non-PD or PD; NE=not evaluable/estimable

      Conclusion:
      Alectinib demonstrated durable responses, encouraging OS findings, good tolerability and an acceptable safety profile consistent with previous reports in this update of the NP28761 study with extended follow-up.

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    OA08 - Targeted Therapies in Brain Metastases (ID 381)

    • Event: WCLC 2016
    • Type: Oral Session
    • Track: Advanced NSCLC
    • Presentations: 1
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      OA08.06 - Brigatinib Activity in Patients with ALK+ NSCLC and Intracranial CNS Metastases in Two Clinical Trials (ID 4374)

      16:00 - 17:30  |  Author(s): A. Shaw

      • Abstract
      • Presentation
      • Slides

      Background:
      Patients treated with crizotinib often experience disease progression in the brain. Brigatinib, an investigational next-generation ALK inhibitor, is being evaluated in an ongoing phase 1/2 trial (Ph1/2) and an ongoing pivotal phase 2 trial (ALTA).

      Methods:
      In Ph1/2, patients with advanced malignancies, including ALK+ NSCLC, received 30–300 mg brigatinib per day. In ALTA, patients with crizotinib-resistant advanced ALK+ NSCLC received 90 mg qd (arm A) or 180 mg qd with a 7-day lead-in at 90 mg (arm B). Efficacy (in both trials) and safety (in ALTA) are reported for ALK+ NSCLC patients with brain metastases at baseline.

      Results:
      In Ph1/2 and ALTA, 50/79 (63%; IRC-assessed) and 154/222 (69%; investigator-assessed) of ALK+ NSCLC patients, respectively, had baseline brain metastases. In Ph1/2 (n=50), median age was 53 years, 76% received prior chemotherapy, and 8% were crizotinib-naive. In ALTA (n=154), median age was 52 years; 75% received prior chemotherapy. As of November 16, 2015, 25/50 (50%) patients were receiving brigatinib in Ph1/2; as of February 29, 2016, 101/154 (66%) patients were receiving brigatinib in ALTA. For patients with measurable lesions, confirmed iORR was 53% in Ph1/2 and 42%/67% in ALTA A/B (Table). Among patients with only nonmeasurable lesions (Ph1/2, n=31; ALTA A/B, n=54/n=55), 35% had confirmed complete resolution of lesions in Ph1/2; 7%/18% had confirmed complete resolution in ALTA A/B. For all evaluable patients with baseline brain metastases, median intracranial PFS was 15.6 months in Ph1/2 (n=46) and 15.6/12.8 months in ALTA A/B (n=80/n=73). Most common treatment-emergent adverse events in ALTA in patients with baseline brain metastases (n=151 treated): nausea (A/B, 32%/43%), headache (30%/30%), diarrhea (18%/36%), cough (21%/30%), vomiting (25%/26%); grade ≥3 (excluding neoplasm progression): increased blood CPK (1%/11%), hypertension (4%/7%), increased lipase (3%/3%), pneumonia (1%/4%).

      Conclusion:
      Brigatinib has demonstrated substantial clinical activity in ALK+ NSCLC patients with brain metastases in both Ph1/2 and ALTA.

      IRC-Assessed Confirmed Intracranial Response Rates for Patients With Measurable Brain Metastases at Baseline
      Any No rad/active[a]
      Ph1/2[b] n=15 n=9
      iORR 8(53) 6(67)
      iDCR 13(87) 8(89)
      ALTA[c]
      Arm A n=26 n=19
      iORR 11(42) 8(42)
      iDCR 22(85) 16(84)
      Arm B n=18 n=15
      iORR 12(67) 11(73)
      iDCR 15(83) 14(93)
      Data are n(%) iDCR=intracranial disease control rate iORR=intracranial objective response rate IRC=independent review committee [a]No prior brain radiotherapy (Ph1/2); active (untreated or treated and progressed) brain lesions (ALTA) [b]NCT01449461; last scan date: October 8, 2015 [c]NCT02094573; last scan date: April 14, 2016


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    P3.02a - Poster Session with Presenters Present (ID 470)

    • Event: WCLC 2016
    • Type: Poster Presenters Present
    • Track: Advanced NSCLC
    • Presentations: 1
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      P3.02a-016 - Pooled Efficacy and Safety Data from Two Phase II Studies (NP28673 and NP28761) of Alectinib in ALK+ Non-Small-Cell Lung Cancer (NSCLC) (ID 5044)

      14:30 - 15:45  |  Author(s): A. Shaw

      • Abstract
      • Slides

      Background:
      Alectinib is an FDA-approved ALK TKI, for treatment of patients with ALK+ metastatic NSCLC who have progressed on, or are intolerant to, crizotinib. Systemic and CNS efficacy was demonstrated in two single-arm, phase II studies (NP28673 [NCT01801111] and NP28761 [NCT01871805]). We report the pooled systemic efficacy and safety analysis of alectinib from 2016 cut-offs 22 January, NP28761 and 1 February, NP28673.

      Methods:
      Patients were ≥18 years, had locally advanced or metastatic ALK+ NSCLC [FDA-approved FISH test] and had progressed on, or were intolerant to, crizotinib. Patients received oral alectinib 600mg twice daily until disease progression, death or withdrawal. The pooled analysis assessed objective response rate (ORR) by an independent review committee (IRC) using RECIST v1.1 (primary endpoint in both studies); disease control rate (DCR); duration of response (DOR); progression-free survival (PFS); overall survival (OS); and safety.

      Results:
      The pooled dataset included 225 patients, (n=138 NP28673; n=87 NP28761). Median age was 53 years, 60% of patients had baseline CNS metastases and 77% had received prior chemotherapy. The response-evaluable (RE) population by IRC included 189 patients (84%). Median follow-up was 18.8 months (0.6–29.7). In the RE population (n=189) ORR by IRC was 51.3% (95% CI 44.0–58.6; all partial responses), a DCR of 78.8% (95% CI 72.3–84.4), with a median DOR of 14.9 months (95% CI 11.1–20.4) after 58% of events. In patients with prior chemotherapy (n=148), IRC ORR was 49.3% (95% CI 41.0–57.7); DCR: 79.1% (95% CI 71.6–85.3); median DOR: 14.9 months (95% CI 11.0–21.9) after 59% of events. In patients who were chemotherapy-naïve (n=41), IRC ORR was 58.5% (95% CI 42.1–73.7); DCR: 78.0% (95% CI 62.4–89.4); median DOR: 11.2 months (95% CI 8.0–NE) after 54% of events. In the total pooled population (n=225) median PFS by IRC was 8.3 months (95% CI 7.0–11.3) after 69% of events and median OS was 26.0 months (95% CI 21.4–NE) after 43% of events. Grade ≥3 adverse events (AEs) occurred in 40% of patients and the most common were dyspnoea (4%), elevated levels of blood creatine phosphokinase (4%) and alanine aminotransferase (3%). The mean dose intensity was 94.6%. Fourteen patients withdrew due to AEs; 20.9% had AEs leading to dose interruptions/modification.

      Conclusion:
      This pooled analysis confirmed alectinib has robust systemic efficacy with a durable response in this population and in patients with or without prior chemotherapy. Alectinib had an acceptable safety profile.

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