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Genentech’s Tecentriq and Avastin Plus Chemo Reduced Disease Worsening Risk or Death by 38 Percent for People with a Type of Advanced Lung Cancer

By Genentech | December 8, 2017

Genentech announced results from the positive, pivotal Phase III IMpower150 study of TECENTRIQ(atezolizumab) and Avastin (bevacizumab) plus chemotherapy (carboplatin and paclitaxel) in people with previously untreated, advanced non-squamous non-small cell lung cancer (NSCLC). The study showed that people who received TECENTRIQ and Avastin plus chemotherapy had a 38 percent reduced risk of their disease worsening or death (progression-free survival, PFS) compared with those who received Avastin plus chemotherapy (hazard ratio [HR]=0.62, p<0.0001, 95 percent CI: 0.52-0.74; median PFS = 8.3 vs. 6.8 months). Importantly, a doubling of the 12-month landmark PFS rate was observed with the combination of TECENTRIQ and Avastin plus chemotherapy (37 percent) compared to Avastin plus chemotherapy (18 percent). The rate of tumor shrinkage (overall response rate, ORR), a secondary endpoint in the study, was higher in people treated with TECENTRIQ and Avastin plus chemotherapy compared with Avastin plus chemotherapy (64 percent vs. 48 percent). The safety profile of the TECENTRIQ and Avastin plus chemotherapy combination was consistent with the safety profiles of the individual medicines, and no new safety signals were identified with the combination.

The analysis of the co-primary PFS endpoint in IMpower150 was assessed in two populations: all randomized people without an ALK or EGFR genetic mutation (intention-to-treat wild-type, ITT-WT) and in a subgroup of people who had a specific biomarker (T-effector “Teff” gene signature expression, Teff-WT). IMpower150 met its PFS co-primary endpoint per study protocol for both populations assessed. In the Teff-WT population, the combination of TECENTRIQ and Avastin plus chemotherapy reduced the risk of disease worsening or death by 49 percent compared to Avastin plus chemotherapy (HR=0.51, p<0.0001, 95% CI: 0.38-0.68; median PFS = 11.3 vs. 6.8 months).

“This TECENTRIQ study is the first positive Phase III combination trial that showed a cancer immunotherapy reduced the risk of the disease getting worse when used as an initial treatment in a broad group of people with advanced non-squamous NSCLC,” said Sandra Horning, M.D., chief medical officer and head of Global Product Development. “The IMpower150 study represents an important advance in lung cancer treatment, and we will submit these results to regulatory authorities around the world to potentially bring a new standard of care to people living with this disease as soon as possible.”

The late-breaking IMpower150 data will be presented at the European Society for Medical Oncology (ESMO) Immuno Oncology Congress (Abstract #LBA1_PR) on Thursday, December 7, 6:15 p.m. Central European Time (CET) and are also part of the official press program. Early results from the co-primary endpoint of overall survival (OS) are encouraging. While they are not yet fully mature, these preliminary OS results will be presented at the ESMO IO Congress. The next analysis of survival is expected in the first half of 2018.

About the IMpower150 study

IMpower150 is a multicenter, open-label, randomized, controlled Phase III study evaluating the efficacy and safety of TECENTRIQ in combination with chemotherapy (carboplatin and paclitaxel) with or without Avastin in people with stage IV or recurrent metastatic non-squamous NSCLC who had not been treated with chemotherapy for their advanced disease. It enrolled 1,202 people of which those with ALK and EGFR mutations were excluded from the primary ITT analysis. People were randomized (1:1:1) to receive:

  • TECENTRIQ plus carboplatin and paclitaxel (Arm A), or
  • TECENTRIQ and Avastin plus carboplatin and paclitaxel (Arm B), or
  • Avastin plus carboplatin and paclitaxel (Arm C, control arm).

During the treatment-induction phase, people in Arm A received TECENTRIQ administered intravenously at 1200 mg in combination with intravenous infusion of carboplatin and paclitaxel on Day 1 of a 3-week treatment cycle for 4 or 6 cycles. Following the induction phase, people received maintenance treatment with TECENTRIQ (1200 mg every 3 weeks) until loss of clinical benefit or disease progression. Due to pre-specified statistical testing hierarchy, Arm A vs. Arm C has not been formally tested yet. IMpower150 was designed to formally compare TECENTRIQ plus chemotherapy (Arm A) vs. Avastin plus chemotherapy (Arm C), only if TECENTRIQ and Avastin plus chemotherapy (Arm B) is shown to improve OS in the ITT-WT population compared to Avastin plus chemotherapy (Arm C). These OS results are expected in the first half of 2018.

People in Arm B received induction treatment with TECENTRIQ (1200 mg) and Avastin administered intravenously at 15 mg/kg in combination with intravenous infusion of carboplatin and paclitaxel on Day 1 of a 3-week treatment cycle for 4 or 6 cycles. People then received maintenance treatment with the TECENTRIQ Avastin regimen until disease progression (Avastin) or loss of clinical benefit/disease progression (TECENTRIQ).

People in Arm C received induction treatment with Avastin administered intravenously at 15 mg/kg plus intravenous infusion of carboplatin and paclitaxel on Day 1 of a 3-week treatment cycle for 4 or 6 cycles. This was followed by maintenance treatment with Avastin alone until disease progression.

The co-primary endpoints were PFS, as determined by the investigator using Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST v1.1), and OS.


Filed Under: Drug Discovery

 

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