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CHS-388

Phase 1

Advanced Solid Tumor | Small molecule | Oncology |Coherus Oncology, Inc.|Last Updated: Nov 10, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
CONTROLLEDBiomarker
Total Trials1
Total Enrollment145
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04374877Study of CHS-388 (Formerly Known as SRF388) in Patients With Advanced Solid TumorsPHASE1 COMPLETED 145Apr 22, 2020Jun 5, 2025Nov 10, 202523 United States, Singapore +1
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Study Endpoints
Primary Endpoints
[Part A] Dose Limiting Toxicity (DLT)
Assessed during first 28 days of treatment

Evaluation of DLT of CHS-388 as a monotherapy.

[Part B] Confirmed objective response rate (ORR)
Up to 24 months

ORR will be estimated by the percentage of patients achieving a best overall response of CR or PR per RECIST v1.1 and iRECIST.

[Part C] DLT
Assessed during first 21 days of treatment

Evaluation of DLT of CHS-388 in combination with pembrolizumab.

[Part C] Summary of adverse events (AEs) based on treatment emergent AEs (TEAEs)
Up to 24 months

Safety and tolerability of CHS-388 + pembrolizumab will be assessed by summarizing AEs and will be based on TEAEs. A TEAE is an AE that emerges or worsens in the period from the first dose of study treatment to 30 days after the last dose of study drug assessed by per CTCAE version 5.0 or higher.

[Part C -NSCLC Cohort] Objective response rate (ORR)
Up to 24 months

ORR will be estimated by the percentage of patients achieving a best overall response of CR or PR per RECIST v1.1 and iRECIST.

[Part D] Objective response rate (ORR)
Up to 24 months

CR or PR per RECIST v1.1

Secondary Endpoints
[Part A, Part B] Safety Analysis: Summary of adverse events (AEs) and based on treatment-emergent AEs (TEAEs)
Up to 24 months
[Part A, Part B, Part C] Pharmacokinetics (PK) of CHS-388
Up to 24 months
[Part D] Pharmacokinetics (PK) of CHS-388 and toripalimab
Up to 24 months
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part A Monotherapy Dose EscalationEXPERIMENTALThe Part A monotherapy dose escalation portion of the study will evaluate the safety, tolerability, PK, pharmacodynamics, and preliminary efficacy of CHS-388 as monotherapy in up to 30 patients with advanced solid tumors.
Part B CHS-388 Monotherapy ExpansionEXPERIMENTALPart B monotherapy expansion will evaluate the safety, tolerability, PK, pharmacodynamics, and efficacy of CHS-388 monotherapy at the recommended phase 2 dose (RP2D) in up to 40 patients with ccRCC, up to 40 patients with HCC, and up to 40 patients with NSCLC.
Part C CHS-388 in Combination with PembrolizumabEXPERIMENTALPart C will evaluate the safety, preliminary efficacy, tolerability, and PK of CHS-388 in combination with pembrolizumab in patients with advanced RCC or HCC, or anti-PD(L)1 relapsed/refractory advanced NSCLC.
Part D CHS-388 in Combination with ToripalimabEXPERIMENTALPart D will evaluate the safety, preliminary efficacy, tolerability, and PK of CHS-388 in combination with toripalimab in patients with anti-PD(L)1 relapsed/refractory advanced NSCLC.
Interventions
NameTypeDescription
CHS-388DRUGCHS-388 is a fully human IgG1 antibody against IL-27. Inhibition of IL-27 with CHS-388 reduces STAT1 phosphorylation leading to increased pro-inflammatory (anti-tumor) cytokine secretion (e.g., IFN-g, TNF-a) and decreased expression of inhibitory immune checkpoint receptors (e.g., PD-L1, TIGIT, LAG3) on immune cells that may result in anticancer therapeutic activity.
PembrolizumabDRUGPembrolizumab by intravenous (IV) infusion
ToripalimabDRUGToripalimab by IV infusion
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites23

Part A and Part B Abbreviated Inclusion Criteria: * ≥ 18 years of age * Locally advanced or metastatic (Stage IV) solid tumor that has progressed during or after standard therapy, and for whom no available therapies are appropriate (based on investigator judgment) * Patients in Part B with advanced...

Countries:United StatesSingaporeSouth Korea
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