AB154 and AB122 Before Surgery for the Treatment of Recurrent Glioblastoma

Inclusion Criteria

• Grade 4 glioma (glioblastoma and its variants according to the World Health Organization [WHO] 2021), confirmed in tissue at time of initial diagnosis. Tumors with an IDH 1 or 2 mutation are excluded. Sequencing of IDH 1 and 2 is not required but, at a minimum, a negative result for the presence of IDH-1 R132H mutation on immunohistochemistry (IHC) is required for eligibility
• First or second recurrence after treatment. Prior treatment must include at least radiation therapy
• Measurable contrast enhancing tumor by Response Assessment in Neuro-Oncology Criteria (RANO) criteria. Not required for post-surgery eligibility for treatment in cohort B
• Age >= 18 years
• Karnofsky performance status ≥ 80 ( ≥ 70 for eligibility for treatment after surgery in cohort B)
• Absolute neutrophil count (ANC) >= 1,500 /mcL (within 14 days of treatment)
• Platelets >= 100,000 / mcL (within 14 days of treatment)
• Hemoglobin >= 9 g/dL or >= 5.6 mmol/L without transfusion or erythropoietin (EPO) dependency (within 7 days of assessment) (within 14 days of treatment)
• Serum creatinine =< 1.5 X upper limit of normal (ULN) OR measured or calculated creatinine clearance (glomerular filtration rate [GFR] can also be used in place of creatinine or creatinine clearance [CrCl]) >= 60 mL/min for subject with creatinine levels > 1.5 X institutional ULN (within 14 days of treatment)
• Serum total bilirubin =< 1.5 X ULN OR direct bilirubin =< ULN for subjects with total bilirubin levels > 1.5 ULN (within 14 days of treatment)
• Aspartate aminotransferase (AST) (serum glutamic oxaloacetic transaminase [SGOT]) and alanine aminotransferase (ALT) (serum glutamic pyruvic transaminase [SGPT]) =< 2.5 X ULN (within 14 days of treatment)
• Albumin > 2.5 mg/dL (within 14 days of treatment)
• International normalized ratio (INR) or prothrombin time (PT) =< 1.5 X ULN unless subject is receiving anticoagulant therapy as long as PT or partial thromboplastin time (PTT) is within therapeutic range of intended use of anticoagulants (within 14 days of treatment)
• Activated partial thromboplastin time (aPTT) =< 1.5 X ULN unless subject is receiving anticoagulant therapy as long as PT or PTT is within therapeutic range of intended use of anticoagulants (within 14 days of treatment)
• An interval of >= 12 weeks from the end of prior radiation therapy is required unless there is either: i) histopathologic confirmation of recurrent tumor, or ii) new enhancement on MRI outside of the radiation treatment field
• An interval of ≥ 4 weeks or 5 half-lives (whichever is longer) after the last administration of any investigational agent or any other treatment prior to first study dose
• Female subjects of childbearing potential should have a negative urine or serum pregnancy test. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required. Female subjects of childbearing potential must be willing to use 2 methods of birth control or be surgically sterile or abstain from heterosexual activity for the course of the study through 120 days after the last dose of study medication. Subjects of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > 1 year. Male subjects should agree to use an adequate method of contraception starting with the first dose of study therapy through 120 days after the last dose of study therapy
• Ability to understand and the willingness to sign a written informed consent document
• ADDITIONAL CRITERIA FOR COHORT B
• Deemed a candidate for tumor debulking, as determined by the neurosurgeon

Exclusion Criteria

• Patients who have been treated with bevacizumab. Note: Previous use of intra-arterial bevacizumab may be allowed, contingent upon review and approval by study principal investigator and sponsor
• Patients who have not recovered from adverse events due to prior therapy (i.e. > grade 1)
• Patients with multifocal disease (Cohort B only)
• Subjects requiring escalating or chronic supraphysiologic doses of corticosteroids (> 10 mg/d of prednisone equivalent or > 2 mg dexamethasone) for control of disease at the time of registration
• Patients receiving previous or current treatment with an immune checkpoint inhibitor
• Patients with a known diagnosis of immunodeficiency, including human immunodeficiency virus (HIV) or acquired immunodeficiency syndrome (AIDS)
• Has known active hepatitis B (e.g., hepatitis B surface antigen [HBsAg] reactive) or hepatitis C (e.g., hepatitis C virus [HCV] ribonucleic acid [RNA] [qualitative] is detected)
• Has a known history of active TB (Bacillus Tuberculosis)
• Has a known additional malignancy that is progressing or requires active treatment. Exceptions include basal cell carcinoma of the skin or squamous cell carcinoma of the skin that has undergone potentially curative therapy or in situ cervical cancer
• Has active autoimmune disease that has required systemic treatment in the past 2 years (i.e. with use of disease modifying agents, corticosteroids or immunosuppressive drugs). Replacement therapy (e.g., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment
• Has known history of, or any evidence of active, non- infectious pneumonitis
• Has an active infection requiring systemic therapy
• Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the subject’s participation for the full duration of the trial, or is not in the best interest of the subject to participate, in the opinion of the treating investigator
• Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial
• Is pregnant or breastfeeding or expecting to conceive or father children within the projected duration of the trial, starting with the pre-screening or screening visit through 120 days after the last dose of trial treatment
• Unable to undergo MRI of the brain with and without contrast enhancement (i.e. pacemaker, allergy to MRI contrast agent or any other contraindication for MRIs)
• Has received a live vaccine within 30 days of planned start of study therapy. Note: Seasonal influenza vaccines for injection are generally inactivated flu vaccines and are allowed; however intranasal influenza vaccines (e.g., Flu-Mist) are live attenuated vaccines, and are not allowed