Tempest Announces Agreement with Roche to Support Advancement of Amezalpat Combination Therapy into First-Line Hepatocellular Carcinoma Pivotal Trial

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Tempest Therapeutics
Tempest Therapeutics

The company is preparing for the Phase 3 study start in the first quarter of 2025

BRISBANE, Calif., Oct. 10, 2024 (GLOBE NEWSWIRE) -- Tempest Therapeutics, Inc. (Nasdaq: TPST), a clinical-stage biotechnology company developing first-in-classi targeted and immune-mediated therapeutics to fight cancer, today announced an agreement with Roche to advance the evaluation of amezalpat (TPST-1120) in combination with atezolizumab (Tecentriq®) and bevacizumab, the current standard of care for unresectable or metastatic hepatocellular carcinoma (HCC), into a pivotal Phase 3 trial for the first-line treatment of unresectable or metastatic hepatocellular carcinoma, a form of liver cancer with high unmet need.

Under the agreement, Roche will supply atezolizumab globally and Tempest will sponsor and lead the pivotal study. This agreement builds on a clinical collaboration between the companies pursuant to which amezalpat was combined with atezolizumab and bevacizumab in first-line HCC patients and compared to atezolizumab and bevacizumab alone in a randomized Phase 1b/2 study. Tempest retains all development and commercial rights to amezalpat.

“We’re excited to announce this agreement that supports the advancement of amezalpat into a pivotal study and reinforces both Tempest and Roche’s shared commitment to delivering groundbreaking cancer treatments for patients,” said Stephen Brady, president and chief executive officer of Tempest. “Based on the positive Phase 2 data, I believe this combination therapy holds the potential to significantly improve first-line liver cancer treatment, and we look forward to amezalpat moving into this pivotal Phase 3 study.”

In June, Tempest reported updated positive survival data from the ongoing global randomized Phase 1b/2 clinical study, demonstrating a six-month improvement in median overall survival (OS) for patients receiving the combination therapy, in comparison to the control arm of atezolizumab and bevacizumab alone in the first-line treatment of patients with unresectable or metastatic HCC. The survival benefit observed in the amezalpat arm was maintained in key subpopulations, as well. These June data build upon previously released data from the primary analysis showing that the amezalpat combination therapy provided clinical benefit regardless of PD-L1 status and in patients with both immune excluded and immune desert tumors. Patients with a mutation in the beta catenin gene had an increased objective response rate and, in the updated data set, a longer median OS, both supported by amezalpat’s purported mechanism of action.

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