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A Multicenter Trial to Identify Optimal Atezolizumab Biomarkers in the Setting of Recurrent Glioblastoma. The MOAB Trial

  • PhasePhase 2
  • StatusRecruiting
  • Planned enrollment80 people
  • Recruiting US sites3
  • SponsorDuke University
  • RegistryNCT06069726

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

A Multicenter Trial to Identify Optimal Atezolizumab Biomarkers in the Setting of Recurrent Glioblastoma. The MOAB Trial: a one-minute explainerNCT060697261 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

  • Age ≥ 18 years old
  • Pathologically confirmed GBM, IDHwt
  • Clinical or radiologic evidence of first or second recurrence following radiation and TMZ. Note: A diagnostic biopsy is required prior to the commencement of the study drug if there is uncertainty about the MRI findings being true progression versus pseudoprogression.
  • Tissue available from initial diagnosis of primary GBM
  • Adequate organ function:
  • Hemoglobin ≥ 9 g/dl
  • Platelet count ≥ 75,000/µl
  • Neutrophil count ≥ 1000 cells/mm3
  • Creatinine ≤ 1.5 x ULN (calculated using the Cockcroft-Gault formula)
  • Total bilirubin ≤ 1.5 x ULN (Exception: Participant has known or suspected Gilbert's Syndrome for which additional lab testing of direct and/or indirect bilirubin supports this diagnosis. In these instances, a total bilirubin of ≤ 3.0 x ULN is acceptable.)
  • Alkaline phosphatase (ALP) ≤ 2.5 x upper limit of normal (ULN)
  • AST and ALT ≤ 2.5 x ULN
  • Serum albumin ≥ 25 g/L (2.5 g/dL)
  • Prothrombin and Partial Thromboplastin Times ≤ 1.2 x ULN
  • Karnofsky Performance Status (KPS) ≥ 70%
  • Patient or partner(s) meets one of the following criteria:
  • Non-childbearing potential (i.e., not sexually active, physiologically incapable of becoming pregnant, including any female who is post-menopausal or surgically sterile, or any male who has had a vasectomy). Surgically sterile females are defined as those with a documented hysterectomy and/or bilateral oophorectomy or tubal ligation. Postmenopausal for purposes of this study is defined as 1 year without menses.; or
  • Childbearing potential and agrees to use one of the following methods of birth control: approved hormonal contraceptives (e.g., birth control pills, patches, implants, or infusions), an intrauterine device, or a barrier method of contraception (e.g., a condom or diaphragm) used with spermicide.
  • A signed informed consent form approved by the Institutional Review Board (IRB) will be required for patient enrollment into the study. Patients must be able to read and understand the informed consent document and must sign the informed consent indicating that they are aware of the investigational nature of this study.
  • Negative HIV test at screening, with the following exception: patients with a positive HIV test at screening are eligible provided they are stable on anti-retroviral therapy, have a CD4 count > 200/µL, and have an undetectable viral load
  • Negative hepatitis B surface antigen (HBsAg) test at screening. Negative total hepatitis B core antibody (HBcAb) test at screening, or positive total HBcAb test followed by a negative hepatitis B virus (HBV) DNA test at screening Note: The HBV DNA test will be performed only for patients who have a negative HBsAg test and a positive total HBcAb test.
  • Negative hepatitis C virus (HCV) antibody test at screening, or positive HCV antibody test followed by a negative HCV RNA test at screening Note: The HCV RNA test must be performed for patients who have a positive HCV antibody test.

You cannot join if

  • Pregnancy or breastfeeding or intention of becoming pregnant during study treatment or within 5 months of final dose of atezolizumab therapy
  • a) For women of childbearing potential: Agree to remain abstinent (refrain from heterosexual intercourse) or use contraceptive methods as defined below: i) Women must remain abstinent or use contraceptive methods with a failure rate of < 1% per year during the treatment period and for 5 months after the final dose of atezolizumab. Examples of contraceptive methods with a failure rate of < 1% per year include bilateral tubal ligation, male sterilization, hormonal contraceptives that inhibit ovulation, hormone-releasing intrauterine devices, and copper intrauterine devices. The reliability of sexual abstinence should be evaluated in relation to the duration of the clinical trial and the preferred and usual lifestyle of the patient. Periodic abstinence (e.g., calendar, ovulation, symptothermal, or post-ovulation methods) and withdrawal are not adequate methods of contraception. If required per local guidelines or regulations, locally recognized adequate methods of contraception and information about the reliability of abstinence will be described in the local Informed Consent Form.
  • ii) A woman is of childbearing potential if she is post-menarchal, has not reached a postmenopausal state (≥ 12 continuous months of amenorrhea with no identified cause other than menopause), and has not undergone surgical sterilization (removal of ovaries, fallopian tubes and/or uterus) or another cause as determined by the investigator (e.g., Müllerian agenesis). Per this definition, a woman with a tubal ligation is of childbearing potential. The definition of childbearing potential may be adapted for alignment with local guidelines or requirements.
  • b) For men with pregnant female partners and/or with female partners of childbearing potential: Agree to remain abstinent (refrain from heterosexual intercourse) or use a condom and refrain from donating sperm.
  • i) With a female partner of childbearing potential or pregnant female partner, men must remain abstinent or use a condom during the treatment period for 5 months after the final dose of atezolizumab to avoid exposing the embryo. Men must refrain from donating sperm during this same period. The reliability of sexual abstinence should be evaluated in relation to the duration of the clinical trial and the preferred and usual lifestyle of the patient. Periodic abstinence (e.g., calendar, ovulation, symptothermal, or postovulation methods) and withdrawal are not adequate methods of preventing drug exposure. If required per local guidelines or regulations, information about the reliability of abstinence will be described in the local Informed Consent Form.
  • Prior treatment with immunotherapy
  • Prior treatment with bevacizumab within 4 weeks before biopsy. Note: Bevacizumab will be permitted if necessary to control inflammatory side effects 5-7mg/kg Q 3/52 for up to 3 cycles
  • Treatment with systemic immunosuppressive medication (including, but not limited to, more than 2 mg of dexamethasone or equivalent corticosteroids, cyclophosphamide, azathioprine, methotrexate, thalidomide, and anti-TNF-a 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) are 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.
  • History of severe allergic anaphylactic reactions to chimeric or humanized antibodies or fusion proteins
  • Known hypersensitivity to Chinese hamster ovary cell products or to any component of the atezolizumab formulation
  • Active 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, Sjögren syndrome, Guillain-Barré syndrome, or multiple sclerosis (see Appendix E in Section 16.5 for a more comprehensive list of autoimmune diseases and immune deficiencies), 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:
  • i) Rash must cover < 10% of body surface area ii) Disease is well controlled at baseline and requires only low-potency topical corticosteroids iii) There has been 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.
  • < 12 weeks from radiation therapy, unless progressive disease outside of previous radiation field or 2 progressive MRIs, 4 weeks apart; (to avoid enrolling patients with pseudoprogression)
  • Contraindication to surgery
  • Significant cardiovascular disease (such as New York Heart Association Class II or greater cardiac disease, myocardial infarction, or cerebrovascular accident) within 3 months prior to initiation of study treatment, unstable arrhythmia, or unstable angina
  • Major surgical procedure, other than for diagnosis, within 4 weeks prior to initiation of study treatment, or anticipation of need for a major surgical procedure during the study
  • History of malignancy within 12 months prior to screening, with the exception of malignancies with a negligible risk of metastasis or death (e.g., 5-year OS rate > 90%), such as adequately treated carcinoma in situ of the cervix, non-melanoma skin carcinoma, localized prostate cancer, ductal carcinoma in situ, or Stage 1 uterine cancer.
  • Severe infection within 4 weeks prior to initiation of study treatment, including, but not limited to, hospitalization for complications of infection, bacteremia, or severe pneumonia, or any active infection that could impact patient safety
  • Treatment with a live, attenuated vaccine within 4 weeks prior to initiation of study treatment, or anticipation of need for such a vaccine during atezolizumab treatment or within 5 months after the final dose of atezolizumab
  • Treatment with investigational therapy within 28 days prior to initiation of study treatment
  • Prior treatment with CD137 agonists or immune checkpoint blockade therapies, including anti-CTLA-4, anti-PD-1, and anti-PD-L1 therapeutic antibodies
  • Uncontrolled pleural effusion, pericardial effusion, or ascites requiring recurrent drainage procedures (once monthly or more frequently). Patients with indwelling catheters (e.g., PleurX) are allowed.
  • Uncontrolled or symptomatic hypercalcemia (ionized calcium > 1.5 mmol/L, calcium > 12 mg/dL or corrected serum calcium > ULN)
  • Active tuberculosis
  • History of idiopathic pulmonary fibrosis, organizing pneumonia (e.g., bronchiolitis obliterans), drug-induced pneumonitis, or idiopathic pneumonitis, or evidence of active pneumonitis. History of radiation pneumonitis in the radiation field (fibrosis) is permitted.
  • Treatment with therapeutic oral or IV antibiotics within 2 weeks prior to initiation of study treatment. Patients receiving prophylactic antibiotics (e.g., to prevent a urinary tract infection or chronic obstructive pulmonary disease exacerbation) are eligible for the study.
  • Prior allogeneic stem cell or solid organ transplantation

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.

atezolizumab. A humanized, Fc optimized, monoclonal antibody directed against the protein ligand PD-L1 (programmed cell death-1 ligand 1; CD274), with potential immune checkpoint inhibitory and antineoplastic activities. Atezolizumab binds to PD-L1, blocking its binding to and activation of its receptor programmed death 1 (PD-1; PDCD1) expressed on activated T cells, which may enhance the T-cell-mediated immune response to neoplasms and reverse T-cell inactivation. In addition, by binding to PD-L1, atezolizumab also prevents binding of this ligand to B7.1 (CD80) expressed on activated T cells, which further enhances the T-cell-mediated immune response. PD-L1 is overexpressed on many human cancer cell types and on various tumor-infiltrating immune cells. PD-L1 binding to PD-1 on T cells suppresses the immune system and results in increased immune evasion. PD-1, a transmembrane protein, is a negative regulator of the immune system that limits the expansion and survival of CD8+ T cells. The Fc region of atezolizumab is modified in such a way that it does not induce either antibody-dependent cytotoxicity (ADCC) or complement-dependent cytotoxicity (CDC). NCI Drug Dictionary

Treatments listed in the registry

  • Atezolizumab (Drug): One dose of atezolizumab will be given prior to resection.

The study

Treatment groups

Na · Single Group · masking: None

Pre-Surgery Atezolizumab (Experimental)

80 patients with rGBM who are eligible for surgical debulking will be treated with one dose of atezolizumab prior to resection. Resected tissue will be used to pathologically confirm recurrence, and tumor tissue will be analyzed by whole exome sequencing (WES). Anticipating that40 patients with low TMB and 40 with high TMB will be treated. All treated subjects will receive post-operative atezolizumab until progression, unacceptable toxicity, death or withdrawal of consent. Post-atezolizumab survival will be compared between low vs high TMB arms to determine if low TMB associates with longer survival after atezolizumab

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.

  • surgery: Part of the study plan

Goals

What the study measures

Main goals

  • Median survival within the low and high TMB groups (Day 1 of atezolizumab treatment until death or off study due to any other reason whichever comes first, assessed for up to 24 months. If the patient is alive at the time of analysis, survival will be censored at the time of last follow-up.)
  • Median survival within the low and high TMB groups and their respective matched historical control group (Day 1 of atezolizumab treatment until death or off study due to any other reason whichever comes first, assessed for up to 24 months. If the patient is alive at the time of analysis, survival will be censored at the time of last follow-up.)

Other goals

  • Proportion of patients that experience grade 3, 4, or 5 adverse events that are possibly, probably, or definitely related to atezolizumab.
  • Compare Progression Free Survival (PFS) using mRANO criteria between low vs high TMB arms and between TMB-matched historical control arms (low and high TMB)

Planned enrollment: 80 (estimated).

Where

Recruiting US sites

  • University of California, San Francisco, San Francisco, California
  • Duke University, Durham, North Carolina
  • Huntsman Cancer Institute, Salt Lake City, Utah

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 Jul 30, 2026. Public record; not medical advice.

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