Virtual Library

Start Your Search

Vivek Subbiah



Author of

  • +

    P1.12 - Small Cell Lung Cancer/NET (ID 179)

    • Event: WCLC 2019
    • Type: Poster Viewing in the Exhibit Hall
    • Track: Small Cell Lung Cancer/NET
    • Presentations: 1
    • Moderators:
    • Coordinates: 9/08/2019, 09:45 - 18:00, Exhibit Hall
    • +

      P1.12-03 - Antitumor Activity of Single Agent Lurbinectedin in Patients with Relapsed SCLC Occurring ≥30 Days After Last Platinum Dose (ID 1710)

      09:45 - 18:00  |  Author(s): Vivek Subbiah

      • Abstract
      • Slides

      Background

      Lurbinectedin (L) inhibits activated transcription and induces DNA double-strand breaks, leading to apoptosis.

      Method

      This multicenter, single agent, phase II Basket trial treated a cohort of 105 SCLC patients (pts) with ECOG PS 0-2 who had received one prior chemotherapy line. L 3.2 mg/m2 was administered as a 1-hour i.v. infusion on Day 1 q3wk. Primary endpoint, confirmed overall response rate (ORR) by RECIST v.1.1 according to investigator assessment, was met (ORR=35.2%; 95% CI, 26.2-45.2%). A sub-analysis excluding the 21 pts with disease relapse < 30 days after last platinum dose is reported here.

      Result

      Median age of 84 evaluated pts was 60 years (range, 41-83), 58.3% were male, ECOG PS 0-1/2 in 96/4%, liver metastasis in 36.9%, history of CNS involvement in 4.8%, prior platinum in 100%, median chemotherapy-free interval (CTFI)=3.9 months (1.1-16.1); prior immunotherapy in 8.3%. A median of 5.5 cycles (range, 1-24) was administered.

      ORR, % (95% CI) (confirmed responses) (n=84)

      40.5 (29.9-51.7)*

      CTFI≥90d (n=60)

      45.0 (32.1-58.4)

      CTFI 30-89d (n=24)

      29.2 (12.6-51.1)

      Disease Control Rate at 6 months, % (n=84)

      48.8

      Median duration of response (months) (95% CI) (n=34)

      5.3 (3.5-6.4)

      CTFI≥90d (n=27)

      6.2 (3.5-7.3)

      CTFI 30-89d (n=7)

      4.1 (2.6-5.3)

      Median overall survival (months) (95% CI) (n=84)**

      10.9 (7.8-14.9)

      CTFI≥90d (n=60)**

      11.9 (9.7-16.2)

      CTFI 30-89d (n=24)**

      (4.1-7.6)

      *4 of 7 pts who failed prior immunotherapy had confirmed response

      **Preliminary data

      L was well tolerated. Neutropenia was the most common adverse event (AE) (G3:21.5% and G4:25%), whereas febrile neutropenia was reported in 2.4%. Most common non-hematological AEs included fatigue (G3: 7.1%), nausea and vomiting (all G1-2: 32.1% and 16.7%) and transaminase increase (G3:7.2%). There was no death due to treatment related AE.

      Conclusion

      L is an active agent for second-line treatment of SCLC. The highest ORR (45.0%) was reported for pts with CTFI≥90d. Notable antitumor activity (ORR=29.2%) was also observed in pts with CTFI 30-89d, for whom no therapy is currently approved. Hence, L is a valuable therapeutic option for SCLC pts with disease relapse after first-line platinum-based therapy.

      Updated trial results will be presented at the conference.

      Only Active Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login or select "Add to Cart" and proceed to checkout.

  • +

    PL02 - Presidential Symposium including Top 7 Rated Abstracts (ID 89)

    • Event: WCLC 2019
    • Type: Plenary Session
    • Track:
    • Presentations: 1
    • Now Available
    • +

      PL02.08 - Registrational Results of LIBRETTO-001: A Phase 1/2 Trial of LOXO-292 in Patients with RET Fusion-Positive Lung Cancers (Now Available) (ID 964)

      08:00 - 10:15  |  Author(s): Vivek Subbiah

      • Abstract
      • Presentation
      • Slides

      Background

      No targeted therapy is currently approved for patients with RET fusion-positive non-small cell lung cancer (NSCLC). LOXO-292 is a highly selective RET inhibitor with activity against diverse RET fusions, activating RET mutations and brain metastases. Based on initial data from LIBRETTO-001, LOXO-292 received FDA Breakthrough Designation for the treatment of RET fusion-positive NSCLC in August 2018.

      Method

      This global phase 1/2 study (87 sites, 16 countries) enrolled patients with advanced RET-altered solid tumors including RET fusion-positive NSCLC (NCT03157128). LOXO-292 was dosed orally in 28-day cycles. The phase 1 portion established the MTD/RP2D (160 mg BID). The phase 2 portion enrolled patients to one of six cohorts based on tumor type, RET alteration, and prior therapies. The primary endpoint was ORR (RECIST 1.1). Secondary endpoints included DoR, CNS ORR, CNS DoR, PFS, OS, safety and PK.

      Result

      As of 17-June 2019, 253 RET fusion-positive NSCLC patients were treated. The primary analysis set (PAS) for LOXO-292 registration, as defined with the US FDA, consists of the first 105 consecutively enrolled RET fusion-positive NSCLC patients who received prior platinum-based chemotherapy; 58 patients (55%) also received prior anti PD-1/PD-L1 agents. The majority of PAS responders have been followed for ≥6 months from first response. Of the remaining 148 patients, 79 had previously been treated with platinum-based chemotherapy, 55 did not receive prior platinum-based chemotherapy and 14 did not have measurable disease at baseline.

      Among PAS patients, the investigator-assessed ORR was 68% (95% CI 58-76%, n=71/105, 2 PRs pending confirmation). Responses did not differ by fusion partner or the type or number of prior therapies, including chemotherapy, anti PD-1/PD-L1 agents and multikinase inhibitors with anti-RET activity. The median DoR was 20.3 months (95% CI 13.8-24.0) with a median follow-up of 8 months; as evidenced by the wide confidence interval, this DoR estimate is not statistically stable due to a low number of events (16 of 69 confirmed responders). The intracranial ORR was 91% (n=10/11: 2 confirmed CRs, 8 confirmed PRs) for patients with measurable brain metastases at baseline.

      The ORR in efficacy evaluable treatment naïve RET fusion-positive NSCLC patients was 85% (95% CI 69-95%, n=29/34, 7 PRs pending confirmation). In the safety data set of all 531 patients, 5 treatment-related AEs occurred in ≥15% of patients: dry mouth, diarrhea, hypertension, increased AST and increased ALT. Most AEs were grade 1-2. Only 9 of 531 (1.7%) patients discontinued LOXO-292 for treatment-related AEs.

      Conclusion

      LOXO-292 had marked antitumor activity in RET fusion-positive NSCLC patients and was well tolerated. These data will form the basis of an FDA NDA submission later this year.

      Only Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login, select "Add to Cart" and proceed to checkout. If you would like to become a member of IASLC, please click here.

      Only Active Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login or select "Add to Cart" and proceed to checkout.