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Adding a Live Biotherapeutic Product (CBM588) to Pembrolizumab for the Treatment of Renal Cell Cancer After Surgery

  • PhasePhase 2
  • StatusRecruiting
  • Planned enrollment62 people
  • Recruiting US sites2
  • SponsorCity of Hope Medical Center
  • RegistryNCT07037004

Recruitment re-checked on ClinicalTrials.gov Oct 30, 2026. Public record; not medical advice.

Adding a Live Biotherapeutic Product (CBM588) to Pembrolizumab for the Treatment of Renal Cell Cancer After Surgery: a one-minute explainerNCT070370041 min

Eligibility

Who can join

The film gives the main points. The full list below is copied from the registry; the study team makes the final decision.

  • Age18 Years to no maximum
  • SexAll
  • Healthy volunteersNo

You may be able to join if

  • Be willing and able to provide informed consent for the trial
  • Histological confirmation of renal cell carcinoma (RCC) with a clear-cell or sarcomatoid component
  • Pathologic stage of pT2, G4 or sarcomatoid, N0M0; pT3, any grade, N0M0; pT4, any grade, N0M0; pTany, any grade, N+M0; or M1 no evidence of disease (NED) after resection
  • No prior systemic immunotherapy for RCC
  • Eastern Cooperative Oncology Group (ECOG) performance status < 2
  • Males and females, ages ≥ 18
  • Any ethnicity or race
  • Calculated creatinine clearance ≥ 30 milliliters per minute (mL/min) per the Cockcroft and Gault formula or serum creatinine < 1.5 x upper limit of normal (ULN)
  • Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) < 3 x ULN (< 5 x ULN if liver metastases are present)
  • Total bilirubin < 1.5 x ULN (except subjects with Gilbert syndrome, who can have total bilirubin up to 3.0 mg/dL)
  • Adequate bone marrow function defined by any of the following laboratory test findings: white blood cells (WBC) > 2,000/mm^3, neutrophils > 1,500/mm^3, platelets > 100,000/mm^3
  • Female subjects of child-bearing potential and female partners of male subjects must agree to use a highly effective method of contraception during treatment and for at least 5 months after the last dose
  • Highly effective methods of contraception include: tubal ligation, an approved hormonal contraceptive such as oral contraceptives, patches, implants, injections, rings or hormonally impregnated intrauterine device (IUD), or IUD

You cannot join if

  • Prior radiation or anti-PD1, anti-PDL1, or anti-CTLA-4 therapy for RCC
  • Any active or recent history of a known or suspected autoimmune disease or recent history of a syndrome that required systemic corticosteroids (> 10 mg daily prednisone equivalent) or immunosuppressive medications except for syndromes which would not be expected to recur in the absence of an external trigger. Subjects with vitiligo or type I diabetes mellitus or residual hypothyroidism due to autoimmune thyroiditis only requiring hormone replacement are permitted to enroll
  • Active interstitial lung disease (ILD)/pneumonitis or history of ILD/pneumonitis requiring treatment with systemic steroids
  • Baseline pulse oximetry less than 92% "on room air"
  • Current use, or intent to use probiotics, prebiotics, yogurt, bacterial fortified foods and other natural supplements ≤ 2 weeks prior to treatment initiation and during the period of treatment
  • Any condition requiring systemic treatment with corticosteroids (> 10 mg daily prednisone equivalents) or other immunosuppressive medications within 14 days prior to first dose of study drug. Inhaled steroids and adrenal replacement steroid doses > 10 mg daily prednisone equivalents are permitted in the absence of active autoimmune disease
  • Uncontrolled adrenal insufficiency
  • Known medical condition (e.g., a condition associated with diarrhea or acute diverticulitis) that, in the investigator's opinion, would increase the risk associated with study participation or study drug administration or interfere with the interpretation of safety results
  • Not recovered to ≤ grade 1 toxicities related to any prior therapy before administration of study drug
  • Women who are pregnant or breastfeeding
  • History of myocarditis or congestive heart failure (as defined by New York Heart Association Functional Classification III or IV), as well as unstable angina, serious uncontrolled cardiac arrhythmia, uncontrolled infection, or myocardial infarction 6 months prior to study entry

The treatment

How it is intended to work

This is how the treatment is meant to work. Whether it helps, and how safe it is, is what this trial is testing.

Treatments listed in the registry

  • Biospecimen Collection (Procedure): Undergo collection of blood samples
  • Clostridium butyricum CBM588 Strain (Drug): Given PO
  • Computed Tomography (Procedure): Undergo CT
  • Pembrolizumab (Biological): Given IV

The study

Treatment groups

Randomized · Parallel · masking: None

Arm 1 (CBM588, pembrolizumab) (Experimental)

Patients receive CBM588 PO BID on days 1-21 or days 1-42 of each cycle and pembrolizumab IV over 30 minutes on day 1 of each cycle. Cycles repeat every 21 or 42 days for up to 12 months in the absence of disease progression or unacceptable toxicity. Patients also undergo collection of blood samples and CT throughout the study.

Arm 2 (pembrolizumab) (Active Comparator)

Patients receive pembrolizumab IV over 30 minutes on day 1 of each cycle. Cycles repeat every 21 or 42 days for up to 12 months in the absence of disease progression or unacceptable toxicity. Patients also undergo collection of blood samples and CT throughout the study.

What it involves

Procedures

As the registry describes them. Requirements to join, such as a tissue sample, are in the eligibility list above even when on-study procedures are optional. Ask the study team which steps apply to you.

  • blood samples: Part of the study plan
  • CT scans: Part of the study plan

Goals

What the study measures

Main goals

  • Change in interleukin (IL)-12 levels (Baseline to week 12)

Other goals

  • Recurrence-free survival (RFS)
  • Overall survival (OS)
  • Shannon diversity index
  • Proportion of circulating regulatory T cells (Tregs)
  • Proportion of circulating myeloid derived suppressor cells (MDSCs)
  • IL-6, IL-8 and other cytokines/chemokines
  • Incidence of toxicities

Planned enrollment: 62 (estimated).

Where

Recruiting US sites

  • City of Hope Medical Center, Duarte, California
  • City of Hope at Irvine Lennar, Irvine, California

Site status as of Oct 30, 2026. Check the live record before contacting a site.

Sources

Where this comes from

Registry record reviewed as fetched Oct 30, 2026, last updated by the sponsor Oct 18, 2026. Public record; not medical advice.

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