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Chemotherapy With or Without Immunotherapy for Peritoneal Mesothelioma

  • PhasePhase 2
  • StatusRecruiting
  • Planned enrollment66 people
  • Recruiting US sites38
  • SponsorNational Cancer Institute (NCI)
  • RegistryNCT05001880

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

Chemotherapy With or Without Immunotherapy for Peritoneal Mesothelioma: a one-minute explainerNCT050018801 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

  • Physicians should consider whether any of the following may render the patient inappropriate for this protocol:
  • Psychiatric illness which would prevent the patient from giving informed consent
  • Medical conditions such as uncontrolled infection, uncontrolled diabetes mellitus or cardiac disease which, in the opinion of the treating physician, would make this protocol unreasonably hazardous for the patient
  • Human immunodeficiency virus (HIV)-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months are eligible for this trial
  • For patients with evidence of chronic hepatitis B virus (HBV) infection, the HBV viral load must be undetectable on suppressive therapy, if indicated
  • Patients with a history of hepatitis C virus (HCV) infection must have been treated and cured. For patients with HCV infection who are currently on treatment, they are eligible if they have an undetectable HCV viral load
  • Patients with a "currently active" second malignancy other than non-melanoma skin cancers or cervical carcinoma in situ. Patients are not considered to have a "currently active" malignancy if they have completed therapy and are free of disease for >= 3 years
  • In addition:
  • Women and men of reproductive potential should agree to use an appropriate method of birth control throughout their participation in this study due to the teratogenic potential of the therapy utilized in this trial. Appropriate methods of birth control include abstinence, oral contraceptives, implantable hormonal contraceptives or double barrier method (diaphragm plus condom)
  • A female of childbearing potential is a sexually mature female who: 1) has not undergone a hysterectomy or bilateral oophorectomy; or 2) has not been naturally postmenopausal for at least 12 consecutive months (i.e., has had menses at any time in the preceding 12 consecutive months)
  • Histologically or cytologically confirmed malignant peritoneal mesothelioma for which there has been no prior treatment. Given the indolent nature of well-differentiated papillary mesothelioma and multicystic mesothelioma, patients with these variants are not eligible for participation
  • Must have measurable disease per RECIST version (v) 1.1
  • Not pregnant and not nursing, because this study involves an agent that has known genotoxic, mutagenic and teratogenic effects. Therefore, for women of childbearing potential only, a negative pregnancy test done =< 28 days prior to registration is required
  • Age >= 18 years
  • Eastern Cooperative Oncology Group (ECOG) performance status 0-1
  • Leukocytes >= 2,500/mm^3
  • Absolute neutrophil count (ANC) >= 1,500/mm^3
  • Platelet count >= 100,000/mm^3
  • Creatinine clearance >= 45 mL/min/1.73 m^2 for patients with creatinine levels above institutional normal
  • Total bilirubin =< 1.5 x upper limit of normal (ULN)
  • Aspartate aminotransferase (AST) / alanine aminotransferase (ALT) =< 3.0 x upper limit of normal (ULN)
  • Urine protein/creatinine (UPC) ratio < 1, or urine protein: =< 1+
  • No prior systemic therapy for peritoneal mesothelioma is allowed. No concurrent radiotherapy is allowed
  • No active or history of autoimmune disease or immune deficiency, including, but not limited to, myasthenia gravis, myositis, autoimmune hepatitis, systemic lupus erythematosus, rheumatoid arthritis, inflammatory bowel disease, antiphospholipid antibody syndrome, Wegener granulomatosis, Sjogren syndrome, Guillain-Barre syndrome, or multiple sclerosis, with the following exceptions:
  • Patients with a history of autoimmune-related hypothyroidism who are on thyroid-replacement hormone are eligible for the study
  • Patients with controlled Type 1 diabetes mellitus who are on an insulin regimen are eligible for the study
  • Patients with eczema, psoriasis, lichen simplex chronicus, or vitiligo with dermatologic manifestations only (e.g., patients with psoriatic arthritis are excluded) are eligible for the study provided all of following conditions are met:
  • Rash must cover < 10% of body surface area
  • Disease is well controlled at baseline and requires only low-potency topical corticosteroids
  • No occurrence of acute exacerbations of the underlying condition requiring psoralen plus ultraviolet A radiation, methotrexate, retinoids, biologic agents, oral calcineurin inhibitors, or high-potency or oral corticosteroids within the previous 12 months
  • No history of idiopathic pulmonary fibrosis, organizing pneumonia (e.g., bronchiolitis obliterans), drug-induced pneumonitis, or idiopathic pneumonitis, or evidence of active pneumonitis on screening chest computed tomography (CT) scan
  • No prior allogeneic stem cell or solid organ transplantation
  • Central nervous system (CNS) metastases must have been treated with local therapy (surgery, radiation, ablation) with systemic steroids tapered to a physiologic dose (10 mg or prednisone equivalent or less)
  • Patients who have received live attenuated vaccines within 30 days of the first dose of trial treatment are eligible at the discretion of the investigator. All seasonal influenza vaccines and vaccines intended to prevent SARS-CoV-2 and coronavirus disease 2019 (COVID-19) are allowed
  • No history of inadequately controlled hypertension (defined as systolic blood pressure > 150 mmHg and/or diastolic blood pressure > 100 mmHg)
  • No history of hypertensive crisis or hypertensive encephalopathy
  • No clinically significant cardiovascular disease, such as cerebrovascular accidents within 12 months prior to randomization, myocardial infarction within 12 months prior to randomization, unstable angina, New York Heart Association (NYHA) grade II or greater congestive heart failure (CHF), or serious cardiac arrhythmia uncontrolled by medication or potentially interfering with study treatment
  • No significant vascular disease (e.g., aortic aneurysm requiring surgical repair or recent arterial thrombosis) within 6 months prior to randomization
  • No history of grade >= 4 venous thromboembolism
  • No history or evidence upon physical or neurological examination of central nervous system disease (e.g. seizures) unrelated to cancer unless adequately treated with standard medical therapy
  • No history of grade >= 2 hemoptysis (defined as >= 2.5 mL of bright red blood per episode) within 1 month prior to screening
  • No history or evidence of inherited bleeding diathesis or significant coagulopathy at risk of bleeding (i.e., in the absence of therapeutic anticoagulation)
  • No major surgical procedure or significant traumatic injury within 28 days prior to initiation of study treatment (diagnostic laparoscopy is allowed as part of diagnosing peritoneal mesothelioma)
  • No core biopsy or other minor surgical procedure, excluding placement of a vascular access device, within 7 days prior to initiation of study treatment
  • Placement of a vascular access device should be at least 2 days prior to initiation of study treatment
  • No active infection requiring IV antibiotics at the time of initiation of study treatment
  • No history of abdominal fistula, gastrointestinal (GI) perforation, intra-abdominal abscess, or active GI bleeding within 6 months prior to randomization
  • No serious, non-healing wound, active ulcer, or untreated bone fracture
  • No other malignancy within 5 years prior to randomization, except for localized cancer in situ, such as basal or squamous cell skin cancer
  • Patients with a creatinine clearance between 45 and 79 mL/min should not use ibuprofen or other nonsteroidal anti-inflammatory drug (NSAIDs) for 2 days before, the day of, and 2 days following pemetrexed administration
  • No treatment with immunosuppressive medication (including, but not limited to, corticosteroids, cyclophosphamide, azathioprine, methotrexate, thalidomide, and anti-TNF-alpha agents) within 2 weeks prior to initiation of study treatment, or anticipation of need for systemic immunosuppressive medication during study treatment, with the following exceptions:
  • Patients who received acute, low-dose systemic immunosuppressant medication or a one-time pulse dose of systemic immunosuppressant medication (e.g., 48 hours of corticosteroids for a contrast allergy) may be eligible for the study
  • Patients who received mineralocorticoids (e.g., fludrocortisone), corticosteroids for chronic obstructive pulmonary disease (COPD) or asthma, or low-dose corticosteroids for orthostatic hypotension or adrenal insufficiency are eligible for the study

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

  • Atezolizumab (Biological): Given IV
  • Bevacizumab (Biological): Given IV
  • Biospecimen Collection (Procedure): Undergo blood and tissue sample collection
  • Carboplatin (Drug): Given IV
  • Computed Tomography (Procedure): Undergo CT scan
  • Cytoreductive Surgery (Procedure): Undergo surgery
  • Hyperthermic Intraperitoneal Chemotherapy (Drug): Undergo HIPEC
  • Pemetrexed Disodium (Drug): Given IV
  • Positron Emission Tomography (Procedure): Undergo PET scan

The study

Treatment groups

Randomized · Parallel · masking: None

Arm I (carboplatin, pemetrexed, bevacizumab, atezolizumab) (Experimental)

Patients receive atezolizumab IV over 30-60 minutes, bevacizumab IV, carboplatin IV, and pemetrexed IV on day 1 of each cycle. Treatment repeats every 21 days for up to 4 cycles in the absence of disease progression or unacceptable toxicity. Within 4-8 weeks, patients then undergo cytoreductive surgery and HIPEC. Patients not eligible for surgery OR patients for whom surgery was aborted, insufficient or lacking cytoreductive intent may receive atezolizumab IV over 30-60 minutes and bevacizumab IV on day 1 of each maintenance therapy cycle. Treatment repeats every 21 days in the absence of disease progression or unacceptable toxicity. Patients also undergo CT scan, PET scan, and collection of blood and tissue samples throughout the study.

Arm II (carboplatin, pemetrexed, bevacizumab) (Active Comparator)

Patients receive bevacizumab IV, carboplatin IV, and pemetrexed IV on day 1 of each cycle. Treatment repeats every 21 days for up to 4 cycles in the absence of disease progression or unacceptable toxicity. Within 4-8 weeks, patients then undergo cytoreductive surgery and HIPEC. Patients not eligible for surgery OR patients for whom surgery was aborted, insufficient or lacking cytoreductive intent may receive bevacizumab IV with or without atezolizumab IV over 30-60 minutes on day 1 of each maintenance therapy cycle at the discretion of the investigator. Treatment repeats every 21 days in the absence of disease progression or unacceptable toxicity. Patients also undergo CT scan, PET scan, and collection of blood and tissue samples 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
  • PET scans: Part of the study plan
  • questionnaires: Part of the study plan
  • surgery: Part of the study plan

Goals

What the study measures

Main goals

  • Response rate (Up to 4 years after study activation)

Other goals

  • Major pathologic response rate
  • Completeness of cytoreduction
  • Conversion rate to surgical resection among those not deemed to be surgical candidates
  • Progression-free survival (PFS)
  • Overall survival
  • Incidence of adverse events

Planned enrollment: 66 (estimated).

Where

Recruiting US sites

  • Alliance for Clinical Trials in Oncology, Chicago, Illinois
  • University of Chicago Comprehensive Cancer Center, Chicago, Illinois
  • Carle at The Riverfront, Danville, Illinois
  • Carle Physician Group-Effingham, Effingham, Illinois
  • Carle Physician Group-Mattoon/Charleston, Mattoon, Illinois
  • Carle Cancer Center, Urbana, Illinois
  • The Carle Foundation Hospital, Urbana, Illinois
  • Sanford Joe Lueken Cancer Center, Bemidji, Minnesota
  • Mercy Hospital, Coon Rapids, Minnesota
  • Fairview Southdale Hospital, Edina, Minnesota
  • Minnesota Oncology - Edina, Edina, Minnesota
  • Abbott-Northwestern Hospital, Minneapolis, Minnesota
  • Mayo Clinic in Rochester, Rochester, Minnesota
  • Park Nicollet Clinic - Saint Louis Park, Saint Louis Park, Minnesota
  • Regions Hospital, Saint Paul, Minnesota
  • United Hospital, Saint Paul, Minnesota
  • Rice Memorial Hospital, Willmar, Minnesota
  • Sanford Cancer Center Worthington, Worthington, Minnesota
  • Sanford Bismarck Medical Center, Bismarck, North Dakota
  • Sanford Broadway Medical Center, Fargo, North Dakota
  • Sanford Roger Maris Cancer Center, Fargo, North Dakota
  • Ohio State University Comprehensive Cancer Center, Columbus, Ohio
  • University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
  • UPMC Hillman Cancer Center, Pittsburgh, Pennsylvania
  • Sanford Cancer Center Oncology Clinic, Sioux Falls, South Dakota
  • Sanford USD Medical Center - Sioux Falls, Sioux Falls, South Dakota
  • UT MD Anderson - The Woodlands, Conroe, Texas
  • UT MD Anderson Cancer Center, Houston, Texas
  • UT MD Anderson - West Houston, Houston, Texas
  • UT MD Anderson - League City, League City, Texas
  • UT MD Anderson - Sugar Land, Sugar Land, Texas
  • ThedaCare Regional Cancer Center, Appleton, Wisconsin
  • Marshfield Medical Center-EC Cancer Center, Eau Claire, Wisconsin
  • Marshfield Medical Center-Marshfield, Marshfield, Wisconsin
  • Marshfield Medical Center - Minocqua, Minocqua, Wisconsin
  • Marshfield Medical Center-Rice Lake, Rice Lake, Wisconsin
  • Marshfield Medical Center-River Region at Stevens Point, Stevens Point, Wisconsin
  • Marshfield Medical Center - Weston, Weston, Wisconsin

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

Background research

Papers linked by the registry

These papers are listed in the registry record. Unless a paper is marked as about this trial, it is background research on the treatment or disease, not results from this study.

Sources

Where this comes from

Registry record reviewed as fetched Oct 30, 2026, last updated by the sponsor Oct 25, 2026. Public record; not medical advice.

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