Inclusion Criteria:

1. Patients must have pathologically proven diagnosis of high grade (aka grade III or IV) glioma that has progressed on bevacizumab (anaplastic astrocytoma, anaplastic
oligodendroglioma, glioblastoma, gliosarcoma, H3K27M mutant glioma).

2. Patients must have received prior radiation therapy and standard temozolomide.  Patients who have received any number of therapies for previous progressions will be
considered eligible.

3. Patients must be three or more months from the end of chemoradiotherapy or have biopsy or imaging consistent with disease progression.

4. Physiologic Status/Age: Patients must be 19 years of age or older (the age of consent in Nebraska.)

5. Patients must have recovered from any toxicity of prior therapy to Grade 1 or less.

6. ECOG Performance Status of 0-3.

7. Patients must have an adequate bone marrow reserve (ANC count ≥ 1,500/mm^3, hemoglobin > 8 g/dL, platelet count ≥100,000/mm^3).

8. Patients must have adequate renal and hepatic function with:

1. creatinine < 1.5 x institutional upper limit of normal (ULN);

2. total bilirubin < 1.5 x ULN (unless due to Gilbert's disease);

3. aspartate aminotransferase (AST) or alanine aminotransferase (ALT) < 2.5 x ULN;

4. serum alkaline phosphatase less than 2.5 times the upper limits of normal).

9. The patient must willingly provide written, informed consent after being informed of the procedure to be followed, the experimental nature of the therapy, alternatives,
potential benefits, side-effects, risks, and discomforts.

10. Women of reproductive potential must be non-pregnant and non-nursing and must agree to employ an effective barrier method of birth control throughout the study and for up to 6 months following treatment.

11. Women of child-bearing potential must have a negative pregnancy test within 7 days of initiating study. (Non-child bearing potential is defined as age 55 years or older and
no menses for two years or any age with surgical removal of the uterus and/or both ovaries).

Exclusion Criteria:

1. Any life-threatening illness, medical condition, or organ system dysfunction which, in the investigator's opinion, could compromise the subject's safety, interfere with the
absorption or metabolism of oral APG-157, or put the study outcomes at undue risk

2. Immunotherapy, chemotherapy, radiotherapy, or experimental therapy within one full cycle period before first dose of study drug (i.e., for lomustine 6 weeks, for
temozolomide 4 weeks).

3. Lactating or pregnant.

4. History of uncontrollable allergic reactions to bevacizumab.

5. Clinically Significant Cardiovascular Disease Defined as follows:

- Inadequately controlled hypertension (i.e., systolic blood pressure (SBP) > 160 mm Hg and/or diastolic blood pressure (DBP) > 90 mm Hg despite antihypertensive therapy);

- History of cerebrovascular accident (CVA) within 6 months;

- Myocardial infarction or unstable angina within 6 months.

6. Evidence or history of bleeding diathesis (greater than normal risk of bleeding; i.e., Hereditary Hemorrhagic Telangiectasia type I or HHT-1) or coagulopathy in the absence of therapeutic anti-coagulation or any hemorrhage/bleeding event > Grade 3 within 4
weeks prior to registration.

Note: Patients with full-dose anticoagulants are eligible provided the patient has been on a stable dose for at least 2 weeks.

7. Active wound, a serious or non-healing wound, an active ulcer or untreated bone fracture.

8. History of abdominal fistula, gastrointestinal perforation, or intra-abdominal abscess ≤ 6 months prior to registration.

9. Major surgical procedure, open biopsy, or significant traumatic injury ≤ 28 days prior to registration.

10. Any other clinically significant medical disease or condition laboratory abnormality or psychiatric illness that, in the Investigator's opinion, may interfere with protocol adherence or a subject's ability to give informed consent.

Note: Other protocol defined Inclusion/Exclusion Criteria may apply.

Eligibility last updated 10/4/23. Questions regarding updates should be directed to the study team contact.