Genentech Announces New Data on Novel Cd20-cd3 Bispecific Cancer Immunotherapies in People With Difficult-to-Treat Lymphomas
Genentech, a member of the Roche Group (SIX: RO, ROG; OTCQX: RHHBY), today announced new data on two investigational CD20-CD3 T-cell engaging bispecific antibodies, mosunetuzumab and CD20-TCB, in people with relapsed or refractory (R/R) B-cell non-Hodgkin’s lymphoma (NHL). Results from the Phase I/Ib GO29781 study of mosunetuzumab, including data from people previously treated with chimeric antigen receptor (CAR) T-cell therapy, will be presented at the 61st American Society of Hematology (ASH) 2019 Annual Meeting during the Plenary Scientific Session. The Plenary Scientific Session highlights the top six abstracts submitted to the meeting, as determined by the ASH Program Committee. Additionally, results from the Phase I/Ib NP30179 study evaluating CD20-TCB as a combination therapy with Gazyva (obinutuzumab) for people with R/R NHL, will be presented.
“Despite recent treatment advancements, slow-growing and aggressive non-Hodgkin’s lymphomas present increasingly difficult management challenges with each subsequent relapse,” said Levi Garraway, M.D., Ph.D., chief medical officer and head of Global Product Development. “We’re encouraged by these early results, which suggest that our novel bispecific cancer immunotherapies may help people with relapsed or treatment-refractory disease who need more options.”
The GO29781 study evaluated mosunetuzumab in patients with R/R NHL, including patients who have relapsed following, or are resistant to, CAR T-cell therapy – a patient population with limited treatment options. Results from this dose-escalation study showed encouraging efficacy with an objective response rate (ORR) of 62.7 percent (n=42/67) in slow-growing NHL and 37.1 percent (n=46/124) in aggressive NHL. Additionally, data demonstrated a complete response (CR) rate of 43.3 percent (n=29/67) in slow-growing NHL and 19.4 percent (n=24/124) in aggressive NHL. CRs showed durability, with 82.8 percent (n=24/29) of patients with slow-growing NHL remaining in remission up to 26 months off initial treatment and 70.8 percent (n=17/24) of patients with aggressive NHL, remaining in remission up to 16 months off initial treatment. Of the participants who received prior CAR T-cell therapy, the ORR was 38.9 percent (n=7/18), and 22.2 percent (n=4/18) achieved a CR. Adverse reactions included cytokine release syndrome (CRS) in 28.9 percent of patients with 20.0 percent at Grade 1 and 1.1 percent at Grade 3. Grade 3 neurological adverse events occurred in 3.7 percent of patients.