Coherus Presents Positive Phase 2 Clinical Data on Casdozokitug, a First-in-Class IL-27-Targeted Antibody, at the 2024 ASCO GI Cancers Symposium - Seite 2

“These impressive early clinical and immune activitation data for casdozo in HCC demonstrating an ORR of 38%, including 3 complete reponses, and a favorable safety profile add to the growing body of data supporting IL-27 as a promising novel target in combination therapy for advanced solid tumors,” said Rosh Dias, M.D., Coherus’ Chief Medical Officer. “We now have data across several tumor types for casdozo demonstrating clinical activity. Our comprehensive clinical development program of ongoing and planned clinical trials including casdozokitug in combination with our anti-PD-1 antibody backbone of toripalimab-tpzi, will further advance our internal next-generation immuno-oncology combinations focused on overcoming immune suppression in the tumor microenvironment with the goal of extending survival and improving outcomes for patients.”

Lead-in portion of Phase 2 clinical trial design
The open-label lead-in portion of the Phase 2 clinical trial evaluated casdozo in combination with atezo and bev in 30 patients with treatment-naïve uHCC. Patients received casdozo 10 mg/kg IV q3w, in combination with atezo (1200 mg) and bev (15 mg/kg). The primary endpoint of the lead-in portion of the study was safety and tolerability. Key secondary endpoints included progression-free survival (PFS) and overall response rate (ORR) based on investigator review per RECIST v1.1 (primary) and mRECIST (secondary), as well as disease control rate (DCR). Further [Phase 2] clinical development of cazdozo in HCC is planned to evaluate casdozo/toripalimab (anti-PD-1 antibody)/bev.

Lead-in portion of Phase 2 clinical trial data
As of the data cutoff date (November 9, 2023):
Triplet blockade of the IL-27, PD-(L)1 and VEGF pathways with casdozo/atezo/bev has an acceptable safety profile to date with promising antitumor activity in IO naïve HCC.

• Triplet combination treatment was well tolerated with side effect profile consistent with known adverse event (AE) profiles of atezo/bev.
• Encouraging early activity with casdozo/atezo/bev:
  • RECIST v1.1: ORR of 38% (n=29) with 11 durable objective responses including 3 complete responses and 8 partial responses (1 unconfirmed); median progression-free survival of 8.1 months and disease control rate of 58.6%.
  • mRECIST: ORR of 43% (n=28) with 12 durable objective responses including 3 complete responses and 9 partial responses (1 unconfirmed); median progression-free survival not reached and disease control rate of 60.7%.
• Further analyses of samples from patients who responded to treatment (small n) indicate preliminary association between response and biomarkers of IL-27.