Casdatifan + Zimberelimab for Kidney Cancer

Not yet recruiting at 2 trial locations
WX
Overseen ByWenxin Xu, MD
No Placebo GroupAll trial participants will receive the active study treatment (no placebo)
Prior Safety DataThis treatment has passed at least one previous human trial

What You Need to Know Before You Apply

What is the purpose of this trial?

This trial tests whether the drug casdatifan is safe and effective for treating kidney cancer, either alone or combined with zimberelimab (an immunotherapy drug). It focuses on clear cell renal cell carcinoma, a type of kidney cancer. Participants will be divided into two groups: one receiving only casdatifan and another receiving both casdatifan and zimberelimab. This trial may suit individuals with kidney cancer that can be surgically removed and who meet specific health criteria.

As a Phase 2 trial, the research measures how well the treatment works in an initial, smaller group of people.

Do I need to stop my current medications to join the trial?

The trial requires a washout period (time without taking certain medications) of 28 days for those taking strong CYP3A4 inhibitors and inducers before starting casdatifan. If you are on these medications, you will need to stop them before joining the trial.

Is there any evidence suggesting that this trial's treatments are likely to be safe?

A previous study found that casdatifan was well tolerated by patients with kidney cancer, meaning most did not stop using it due to side effects. Another study also showed that very few people discontinued casdatifan, indicating good safety.

When combined with zimberelimab, research shows that this combination has a manageable safety profile, meaning side effects can be handled without stopping treatment.

Overall, both casdatifan alone and with zimberelimab have demonstrated promising safety results in studies, suggesting they are generally well-tolerated by patients.12345

Why are researchers excited about this trial's treatments?

Researchers are excited about Casdatifan and Zimberelimab for kidney cancer because they bring new approaches to treatment. Unlike standard treatments like surgery, radiation, or chemotherapy, Casdatifan and Zimberelimab target cancer cells more precisely. Casdatifan is a new active ingredient that works through a novel mechanism, possibly offering a more targeted attack on cancer cells. Zimberelimab, an immune checkpoint inhibitor, helps the immune system recognize and fight cancer cells, potentially boosting the body's natural defenses. This combination could offer more effective and less invasive options than current standard treatments.

What evidence suggests that this trial's treatments could be effective for kidney cancer?

Research shows that casdatifan, a drug that blocks a protein involved in cancer growth, holds promise for treating clear cell renal cell carcinoma (ccRCC). Studies have found that 25% to 33% of patients taking casdatifan experience their cancer shrinking or halting its growth. Additionally, casdatifan has been linked to longer periods where the cancer does not worsen. In this trial, participants in Group A will receive casdatifan alone.

Meanwhile, Group B participants will receive a combination of casdatifan and zimberelimab, a medicine that boosts the immune system. Studies with this combination have shown that nearly half of the patients had a confirmed positive response. This suggests that using both drugs together could be a strong option for treating ccRCC.15678

Who Is on the Research Team?

WX

Wenxin Xu, MD

Principal Investigator

Dana-Farber Cancer Institute

Are You a Good Fit for This Trial?

This trial is for adults over 18 with certain stages of kidney cancer (ccRCC) who are planning to have surgery. They should be relatively healthy, able to perform daily activities, and have normal blood counts and liver function tests. A confirmed diagnosis of ccRCC by biopsy is required, along with a measurable tumor.

Inclusion Criteria

My hemoglobin level is at least 10.0 g/dL.
I am 18 years old or older.
My kidney cancer can be measured and is at least 1 cm big.
See 7 more

Timeline for a Trial Participant

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks
1 visit (in-person)

Treatment

Participants receive Casdatifan daily for 21-day cycles, with Zimberelimab administered on Day 1 for Group B

9 weeks
3 cycles of 21 days each

Surgery

Participants undergo standard of care nephrectomy

1 week
1 visit (in-person)

Follow-up

Participants are monitored for safety and effectiveness after treatment

3 years
Regular visits as per protocol

What Are the Treatments Tested in This Trial?

Interventions

  • Casdatifan
  • Zimberelimab

Trial Overview

The study is testing the safety and effectiveness of Casdatifan alone or combined with Zimberelimab in patients before they undergo kidney cancer surgery. Casdatifan inhibits HIF-2α, which may help stop cancer growth; Zimberelimab targets immune checkpoints to fight off cancer cells.

How Is the Trial Designed?

2

Treatment groups

Experimental Treatment

Group I: Group B: Casdatifan + ZimberelimabExperimental Treatment2 Interventions
Group II: Group A: CasdatifanExperimental Treatment1 Intervention

Find a Clinic Near You

Who Is Running the Clinical Trial?

Dana-Farber Cancer Institute

Lead Sponsor

Trials
1,128
Recruited
382,000+

Arcus Biosciences, Inc.

Industry Sponsor

Trials
44
Recruited
7,500+

Citations

Initial Data from the ARC-20 Study of Casdatifan Plus ...

Nearly half of patients had a confirmed response to the casdatifan plus cabozantinib combination despite short follow-up.

HIF-2a Inhibitor Casdatifan Shows Promise for Patients ...

A new study reveals casdatifan's promising efficacy in treating late-stage kidney cancer, showing significant progression-free survival and ...

Casdatifan is linked with promising safety, efficacy in clear ...

Casdatifan showed promising clinical activity in clear cell RCC, with response rates between 25% and 33% across dosage cohorts. The 100 mg/day ...

Casdatifan (Cas) monotherapy in patients (pts) with ...

In heavily pretreated pts with ccRCC, Cas monotherapy was well tolerated with promising early clinical activity across IMDC risk groups.

5.

kidneycancer.org

kidneycancer.org/2025-asco/

Kidney Cancer Highlights from ASCO 2025

Probability of survival was 31% after 9 years on combination therapy compared with 20% with sunitinib. Complete response rates were higher and ...

Press Release Details - Investors & Media - Arcus Biosciences

Casdatifan continues to be well tolerated, with a very low discontinuation rate, supporting its strong potential in combination therapy.

ASCO GU 2025: Casdatifan Monotherapy in Patients with ...

Dr. Toni K. Choueiri presented the safety, efficacy and subgroup analyses from ARC-20, a phase I open-label study of casdatifan monotherapy in ...

Study of Casdatifan and Cabozantinib Versus Placebo and ...

The purpose of the study is to evaluate the progression-free survival (PFS) of casdatifan versus placebo when each is given in combination with ...