Roche announced that the Phase III IMpassion031 study, evaluating Tecentriq (atezolizumab) in combination with chemotherapy (Abraxane, albumin-bound paclitaxel; nab-paclitaxel; followed by doxorubicin and cyclophosphamide) in comparison to placebo plus chemotherapy (including Abraxane), met its primary endpoint by demonstrating a statistically significant and clinically meaningful improvement in pathological complete response (pCR) for the treatment of people with early triple-negative breast cancer (TNBC), regardless of PD-L1 expression.
“Triple-negative breast cancer remains an aggressive disease with high rates of recurrence,” said Levi Garraway, M.D., Ph.D., Roche’s Chief Medical Officer and Head of Global Product Development. “Our goal in treating TNBC at its earliest stages is to provide people with the best chance for a future cure. Adding Tecentriq to chemotherapy now has the potential to help women with TNBC at multiple different stages of the disease.”
In the study, fewer patients who received the Tecentriq combination as a neoadjuvant (before surgery) treatment had evidence of tumour tissue detectable at the time of surgery (known as pCR), regardless of PD-L1 expression, in comparison to the control arm. Neoadjuvant treatment may allow a doctor to quickly assess whether a medicine is working and may also reduce a tumour’s size so it is easier to surgically remove. pCR is a common measure of neoadjuvant treatment effect and can be assessed more quickly than traditional endpoints in early stage breast cancer.
Safety for the Tecentriq combination appeared to be consistent with the known safety profiles of the individual medicines and no new safety signals were identified. Results of the IMpassion031 study will be presented at an upcoming medical meeting and will be discussed with global health authorities including the US Food and Drug Administration (FDA) and European Medicines Agency (EMA).
The IMpassion031 study is the second positive Phase III study from Roche demonstrating the benefit of Tecentriq in TNBC, and the first Tecentriq study to demonstrate benefit in early TNBC. Tecentriq in combination with nab-paclitaxel is currently approved in more than 70 countries worldwide, including the US and across Europe, for the treatment of adults with unresectable locally advanced or metastatic TNBC in people whose tumours express PD-L1 (IC≥1%).
Roche has an extensive development programme for Tecentriq, including multiple ongoing and planned Phase III studies across lung, genitourinary, skin, breast, gastrointestinal, gynaecological, and head and neck cancers. This includes studies evaluating Tecentriq both alone and in combination with other medicines.