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CHS-388

Phase 2

Advanced Solid Tumor | Small molecule | Oncology |Coherus Oncology, Inc.|Trials Updated: Jul 15, 2026

CHS-388 development status

Highest phase Phase 2 (NCT06679985)
Phase scored for CHRSPhase 1
Registered trials 3 across 1 sponsor since May 2020

CHS-388 target and mechanism

Molecular targetIL-27
Target classProtein
ModalitySmall molecule

Also known as Casdozokitug, SRF388

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials2
Total Enrollment217

FDA Designations

No designations recorded

CHS-388 clinical trials

CHS-388 · 2 trials · 4 indications

Phase 2 1Phase 1 1
NCT06679985A Trial of Casdozokitug in Combination With Toripalimab Plus Bevacizumab in Participants With Unresectable and/or Locally Advanced or Metastatic Hepatocellular CarcinomaHepatocellular Carcinoma
ACTIVE NOT_RECRUITING72 Analytics
PHASE2ACTIVE NOT_RECRUITING
A Trial of Casdozokitug in Combination With Toripalimab Plus Bevacizumab in Participants With Unresectable and/or Locally Advanced or Metastatic Hepatocellular Carcinoma
Hepatocellular CarcinomaUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants with Treatment-emergent Adverse Events (TEAEs)
From date of first dose to 90 days after date of last dose (Up to approximately 27 months)
Objective Response Rate (ORR) by Investigator Review According to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1
Up to approximately 2 years
[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

ORR by Investigator Review According to HCC Modified RECIST (mRECIST)
Up to approximately 2 years
Duration of Response (DoR) by Investigator Review According to RECIST v1.1
Up to approximately 2 years
DoR by Investigator Review According to HCC mRECIST
Up to approximately 2 years
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Arm A: Casdozokitug Lower Dose + Toripalimab + BevacizumabEXPERIMENTAL -
Arm B: Casdozokitug Higher dose + Toripalimab + BevacizumabEXPERIMENTAL -
Arm C: Toripalimab + BevacizumabACTIVE_COMPARATOR -
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
CasdozokitugDRUGSolution for infusion
ToripalimabDRUGSolution for infusion
BevacizumabDRUGSolution for infusion
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
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites44

Key Inclusion Criteria: * Unresectable locally advanced or metastatic HCC with diagnosis confirmed by histology/cytology or clinically by American Association for the Study of Liver Diseases criteria in cirrhotic participants. * Disease that is not amenable to curative surgical and/or locoregional ...

Countries:United StatesAustraliaCanadaHong KongSingaporeTaiwanSouth Korea
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Competitive Landscape -Other Solid Tumors 10 trials (matched to "Advanced Solid Tumor")

Recent Changes (Last 90 Days)

MEDIUMAug 15, 2026NCT04374877TRIAL_REMOVED: changed
MEDIUMAug 15, 2026NCT04374877TRIAL_REMOVED: changed
MEDIUMAug 15, 2026NCT04374877TRIAL_REMOVED: changed

Frequently asked questions about CHS-388

What is CHS-388?

CHS-388 is an investigational small molecule developed by Coherus Oncology, Inc. for advanced solid tumors. It was studied in a Phase 1 trial that has completed. It is not described as approved, so it remains an investigational agent in clinical development.

What is CHS-388 used for?

CHS-388 was studied in adults with advanced solid tumors, including clear cell renal cell carcinoma, hepatocellular carcinoma, and non-small cell lung cancer. The Phase 1 study enrolled 145 patients across the United States, Singapore, and South Korea. It is investigational and not approved for any indication.

What does CHS-388 target?

CHS-388 targets IL-27, a protein. IL-27 is a cytokine in the IL-12 family that has been studied for its role in immune regulation within the tumor microenvironment. CHS-388 is a small molecule designed to bind this target, though its precise clinical effect in patients has not been established.

Who is developing CHS-388?

Coherus Oncology, Inc. is developing CHS-388. The company trades on the Nasdaq under the ticker CHRS. Coherus Oncology sponsored the Phase 1 study of CHS-388 in advanced solid tumors, which is the only registered trial for this asset.

What phase is CHS-388 in?

CHS-388 is in Phase 1. Its single registered trial, NCT04374877, was a Phase 1 study in advanced solid tumors that has completed. The study enrolled 145 patients and was controlled, though it was not randomized or double blinded. CHS-388 is not described as approved.

What clinical trials is CHS-388 in?

CHS-388 has been studied in one clinical trial, NCT04374877, titled Study of CHS-388 (Formerly Known as SRF388) in Patients With Advanced Solid Tumors. It was a completed Phase 1 trial with 145 participants, conducted in the United States, Singapore, and South Korea. No active trials are registered.

Is CHS-388 the same as SRF388?

Yes. CHS-388 was formerly known as SRF388, and the two names refer to the same investigational molecule. The Phase 1 trial NCT04374877 lists both names in its title, confirming the change. Searches for SRF388 should therefore lead to the same asset now called CHS-388.