SABR Combined With Targeted Therapy and Anti-PD-1 for Recurrent or Metastatic Renal Cancer (COSTAR)

January 27, 2026 updated by: Peking University First Hospital

Cohort Study of SABR Combined With Targeted Therapy and Anti-PD-1 Versus Targeted Therapy and Anti-PD-1 for Recurrent or Metastatic Renal Cell Carcinoma Patients

Renal cancer ranks seventh in incidence among men and sixth among women in the Beijing area, with Peking University First Hospital treating over 1,000 kidney cancer patients annually. Once recurrence or metastasis occurs, the prognosis is poor, with median progression times of 1-2 years after first-line systemic therapy (targeted therapy combined with immunotherapy). Enhancing local control of lesions is key to improving overall survival. Combining local radiotherapy with systemic treatment may be one approach to address this issue. Currently, Stereotactic Ablative Radiotherapy (SABR) enables precise tumor ablation and can activate the body's immune response. Studies show that the one-year local control rate after SABR exceeds 90%. Preliminary research by the applicant has shown that the combination of drug therapy and SABR for recurrent metastatic renal cancer can extend progression-free survival beyond two years, with earlier intervention leading to more significant survival improvements. This study aims to evaluate the efficacy and safety of combining SABR with targeted and immunotherapy for recurrent metastatic renal cancer through a multicenter, bidirectional cohort design, exploring new therapeutic strategies.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
300

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • China
    • Beijing Municipality
      • Beijing, Beijing Municipality, China, 100091
        • Recruiting
        • Peking University Third Hospital
        • Contact:
      • Beijing, Beijing Municipality, China, 100034
        • Recruiting
        • Peking University First Hospital
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patients with histologically confirmed renal cancer; diagnosed with recurrent or metastatic renal cancer via PET/CT or other whole-body imaging.

Description

Inclusion Criteria:

  • Patients with histologically confirmed renal cancer; diagnosed with recurrent or metastatic renal cancer via PET/CT or other whole-body imaging.
  • Evaluated by the radiation oncology and imaging departments as having at least one lesion amenable to radiation therapy.
  • Planning to undergo or currently receiving first-line or second-line targeted therapy combined with immunotherapy.
  • Voluntarily agrees to participate in the study and signs an informed consent form.
  • Male or female, aged ≥18 years (inclusive).
  • Expected survival of ≥12 weeks.
  • At least one measurable lesion as per the Response Evaluation Criteria in Solid Tumors (RECIST) 1.1.
  • European Cooperative Oncology Group (ECOG) performance status of 0 or 1.
  • Adequate cardiac, bone marrow, liver, and renal function.
  • Willing and able to comply with the study procedures and follow-up schedule.

Exclusion Criteria:

  • Extensive, multiple metastases;
  • Presence of central nervous system metastases and/or carcinomatous meningitis.
  • Toxicity from previous treatments not yet recovered to grade 0-1 (excluding grade 2 alopecia);
  • Other severe, uncontrollable co-morbid conditions that could affect protocol compliance or confound interpretation of results, including active opportunistic or severe progressive infections, uncontrolled diabetes, uncontrolled hypertension, cardiovascular diseases (defined as New York Heart Association Class III or IV heart failure, second-degree or higher heart block, myocardial infarction within the last 12 months, unstable arrhythmias or angina, stroke within the last 6 months), or pulmonary diseases (interstitial pneumonia, obstructive pulmonary disease, and symptomatic bronchospasm history), deep vein thrombosis or pulmonary embolism within the last 6 months;
  • Diagnosed with other malignancies within 5 years prior to enrollment, except:
  • Localized low-risk prostate cancer (defined as stage ≤T2b, Gleason score ≤7, and PSA ≤20ng/mL at diagnosis, who have undergone curative treatment with no recurrence of prostate-specific antigen);
  • Malignancies treated with a curative intent that are considered cured, including but not limited to adequately treated thyroid cancer, cervical carcinoma in situ, basal or squamous cell skin cancer, or ductal carcinoma in situ of the breast treated with surgery;
  • Pregnant or breastfeeding women;
  • Positive HIV test result;
  • Active hepatitis B or C infection;
  • Active tuberculosis;
  • Any other conditions, metabolic abnormalities, physical examination or laboratory findings that in the investigator's judgment might indicate an unsuitability for the study drug, could interfere with the interpretation of study results, or place the patient at high risk if they participate in the study;
  • Estimated insufficient compliance with the clinical study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
RT group
In conjunction with targeted and immunotherapy, administer radiation therapy to achieve as complete coverage as possible of all identifiable primary and metastatic lesions.
Radiation: Radiation therapy
Administer radiation therapy to achieve as complete coverage as possible of all identifiable primary and metastatic lesions in conjunction with targeted and immunotherapy
Drug: Targeted and immunotherapy
Targeted and immunotherapy
Control group
Targeted and immunotherapy
Drug: Targeted and immunotherapy
Targeted and immunotherapy

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Progression free survival 2, PFS2
Time Frame: 2 year
Progression Free Survival 2 (PFS2) is defined as the time from the start of treatment to the point where, despite the emergence of new lesions and continuation of the original systemic therapy, local radiotherapy is used to intervene on new lesions. Subsequently, due to the emergence of additional new lesions or progression of existing lesions, a change in systemic therapy becomes necessary. Alternatively, it also includes situations where a new lesion appears and cannot be treated with radiotherapy, necessitating a change in the original systemic therapy plan.
2 year

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Progression free survival 1, PFS1
Time Frame: 2 year
Defined as the time from the start of treatment to the first progression.
2 year
Overall survival, OS
Time Frame: 2 year
Defined as the time from the start of treatment to death.
2 year
Objective response rate，ORR
Time Frame: six months.
Defined as CR (Complete Response) + PR (Partial Response), representing the best response achieved at any time.
six months.
Disease control rate，DCR
Time Frame: six months.
Defined as CR + PR + SD (Stable Disease), maintained for at least six months.
six months.
Adverse Reactions
Time Frame: 2 year
Evaluated using the Common Terminology Criteria for Adverse Events (CTCAE) version 5.0 to assess treatment-related adverse reactions.
2 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Peking University First Hospital

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Peking University Third Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 2, 2024

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
March 31, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 31, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 24, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 1, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
September 3, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 28, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 27, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • COSTAR-001

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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