Recurrent High Grade GliomaPhase 1NCT05698524
A Study of Temodar With Abexinostat (PCI-24781) for Patients With Recurrent Glioma
A Phase 1 study testing PCI 24781 and Temozolomide in people with Recurrent High Grade Glioma and Anaplastic Astrocytoma, run by University of Nebraska at 1 site in United States.
Trial summary
Glioblastoma (GBM), WHO grade IV glioma, represents the majority of adult malignant primary brain tumors, with an incidence of 2-3 per 100,000 person-years. The survival for GBM has increased in the last decade but is still low with a median survival of 15-18 months. Read more about this study
- Who is it for?
- Ages 19 years and older
- Conditions the study is for
- Recurrent High Grade Glioma, Anaplastic Astrocytoma, Anaplastic Oligodendroglioma
- What is being tested?
- PCI 24781 and Temozolomide
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 24 participants
- Where
- 1 siteUnited States
- Study dates
- 26 Jun 2023to Jul 2027
- Phase
- Phase 1
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 19 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Pathologically proven diagnosis of high grade (aka grade III or IV) glioma (anaplastic astrocytoma, anaplastic oligodendroglioma, glioblastoma, gliosarcoma)
- Prior radiation therapy and standard temozolomide; additional therapies for previous progressions are eligible (prior bevacizumab and Optune are allowed)
- Three or more months from the end of chemoradiotherapy or have biopsy or imaging consistent with disease progression
- 19 years of age or older (the age of consent in Nebraska)
- Fully recovered from any toxicity of prior therapy that, in the opinion of the investigator, could impact tolerance to the study drug
- Eastern Cooperative Oncology Group (ECOG) Performance Status of 0-2
Show all 12Show fewer
- Adequate bone marrow reserve (ANC count ≥1,500/mm3, hemoglobin > 8 g/dL, platelet count ≥100,000/mm3)
- Adequate renal function (a serum creatinine that is at or below 2.0 mg/dL)
- Adequate hepatic function (serum AST and ALT less than 1.5 times the upper limits of normal, serum alkaline phosphatase less than 2.5 times the upper limits of normal)
- Able to provide written, informed consent
- Females 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)
- Females of reproductive potential must agree to employ an effective barrier method of birth control throughout the study and up to 6 months following treatment
Who cannot join
- 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 PCI-24781/Abexinostat, or put the study outcomes at undue risk
- Significant cardiovascular disease such as uncontrolled or symptomatic arrhythmia, congestive heart failure, or myocardial infarction within 6 months of screening, or any Class 3 or 4 cardiac disease as defined by the New York Heart Association Functional Classification
- Malabsorption syndrome, disease significantly affecting gastrointestinal function, or resection of the stomach or small bowel or ulcerative colitis, symptomatic inflammatory bowel disease, or partial or complete bowel obstruction
- Immunotherapy, chemotherapy, radiotherapy, corticosteroids (at dosages equivalent to prednisone > 20 mg/day) or experimental therapy (other than PCI-24781/Abexinostat PO) within 4 weeks before first dose of study drug
- Concurrent use of enzyme-inducing antiepileptic drugs (phenytoin, phenobarbital, carbamazepine, felbamate, topiramate and oxcarbazepine)
- Any other active malignancy other than nonmelanoma skin cancer or controlled prostate cancer
Show all 33Show fewer
- Known history of Human Immunodeficiency Virus (HIV) or active infection with Hepatitis C Virus (HCV) or Hepatitis B Virus (HBV) or any uncontrolled active systemic infection (no testing is required for eligibility)
- Creatinine > 1.5 x institutional upper limit of normal (ULN); total bilirubin > 1.5 x ULN (unless from Gilbert's disease), and aspartate aminotransferase (AST) or alanine aminotransferase (ALT) > 2.5 x ULN
- Pregnant or breast-feeding
- Baseline ECG duration of the ventricular action potential corrected for heart rate (QTc interval) prolongation based on Fridericia's formula is > 450 ms in males and > 470 ms in females
- Concomitant valproic acid use, or another histone deacetylases (HDAC) inhibitor
- Receiving treatment with following medications and unable to discontinue treatment or switch medications prior to study enrollment:
- Amiodarone (Cordarone, Pacerone)
- Arsenic trioxide (Trisenox)
- Chlorpromazine (Aralen)
- Cisapride (Propulsid)
- Clarithromycin (Biaxin)
- Disopyramide (Norpace)
- Dofetilide (Tikosyn)
- Doperidol (Inapsine)
- Erythromycin (EryTab, Erythrocin)
- Flecanide (Tambocor)
- Haloperidol (Haldol)
- Ibutilide (Corvert)
- Methadone (Methadose, Dolophine)
- Moxifloxacin (Avelox)
- Pentamidine (Pentam, Nebupent)
- Pimozide (Orap)
- Procainamide (Procan, Pronestyl)
- Quinidine (Cardioquin, Quinaglute)
- Sotalol (Betapace)
- Thioridazine (Mellaril)
- Vandetanib (Zactima)
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
United States1 site, 1 recruiting
- Recruiting
University of Nebraska Medical Center
Omaha, Nebraska, 68198
Michaela K Savine, RN, 402-836-9488, misavine@unmc.edu
About this study
Official title: A Phase I Study of Metronomic Temozolomide With Abexinostat (PCI-24781) for Patients With Recurrent High Grade Glioma
Glioblastoma (GBM), WHO grade IV glioma, represents the majority of adult malignant primary brain tumors, with an incidence of 2-3 per 100,000 person-years. The survival for GBM has increased in the last decade but is still low with a median survival of 15-18 months. Recurrence after initial standard therapy, radiation therapy and chemotherapy with temozolomide, few options are available. Even with further therapy, median progression free survival at 6 months after first relapse (PFS-6) is only 15%. Similarly, anaplastic astrocytoma and anaplastic oligodendroglioma, grade III gliomas, once recurrent after radiation therapy and first-line chemotherapy, have identical therapeutic options and poor outcomes with PFS-6 of 31%. Temozolomide (TMZ) has a favorable side effect profile and is available orally, however, cytotoxicity occurs. Metronomic temozolomide at low doses on a continuous schedule, have demonstrated better survival in studies. This study will determine the recommended dose and the side effects of PCI-24781/Abexinostat with metronomic temozolomide.
Read the detailed description
Glioblastoma (GBM), WHO grade IV glioma, represents the majority of adult malignant primary brain tumors, with an incidence of 2-3 per 100,000 person-years. The survival for GBM has increased in the last decade but is still low with a median survival of 15-18 months. Recurrence after initial standard therapy, radiation therapy and chemotherapy with temozolomide, few options are available. Even with further therapy, median progression free survival at 6 months after first relapse (PFS-6) is only 15%. Similarly, anaplastic astrocytoma and anaplastic oligodendroglioma, grade III gliomas, once recurrent after radiation therapy and first-line chemotherapy, have identical therapeutic options and poor outcomes with PFS-6 of 31%. Temozolomide (TMZ) has a favorable side effect profile and is available orally, however, cytotoxicity occurs. Metronomic temozolomide at low doses on a continuous schedule, have demonstrated better survival in studies.
Participants will be enrolled to one of each of four dose levels in cohorts of 3. Dose level escalation/de-escalation will follow Bayesian Optimal Interval (BOIN) design rules based on analysis of dose-limiting toxicities (DLTs) that occur within the first cycle of protocol treatment. Protocol treatment will continue until disease progression or intolerable toxicity. Dose Levels: 1 - 60 mg PCI-24781/Abexinostat two times daily (BID), 1.5 - 80 mg PCI-24781/Abexinostat BID, 2 - 100 mg PCI-24781/Abexinostat BID, and 3 - 140 mg PCI-24781/Abexinostat BID.
The primary study objective is to evaluate the toxicities and determine the recommended dose of PCI-24781/Abexinostat with metronomic temozolomide in participants with recurrent high grade glioma, [grade III or IV glioma (glioblastoma, gliosarcoma, anaplastic astrocytoma, anaplastic oligodendroglioma)]. Other objects are to evaluate changes in the acetylation of peripheral blood mononuclear cell (PBMC) histones H3 and H4 during treatment, evaluate acetylation of histones H3 and H4 using peripheral blood exosomes, evaluate progression-free and overall survival of participants with recurrent high grade glioma treated with therapy with PCI-24781/Abexinostat and metronomic temozolomide, descriptively examine quality of life (QOL) using EORTC QLQ-C30 questionnaire and QLQ-BN20 questionnaire during treatment, characterize the pharmacokinetics (PK) of PCI-24781/Abexinostat, temozolomide, and the combination of the 2 drugs, measure tumor response, and correlate molecular profiles with tumor response.
- Conditions
- Recurrent High Grade Glioma, Anaplastic Astrocytoma, Anaplastic Oligodendroglioma, Glioblastoma, Gliosarcoma
- Being tested
- PCI 24781, Temozolomide
- Medical subject headings
- Glioma, Astrocytoma, Oligodendroglioma, Glioblastoma, Gliosarcoma
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
PCI 24781Drug
Also called Abexinostat
Participants will take PCI-24781/Abexinostat on days 1 - 4, 8 - 11, and 15 - 18 of each 28-day cycle.
TemozolomideDrug
Also called Temodar
Participants will receive temozolomide at a dose of 50 mg/mg2, taken by mouth once daily.
| Study group | Role | What they receive |
|---|---|---|
| Single arm | Experimental | Participants will receive a combination of PCI-24781/Abexinostat and temozolomide: loading dose of PCI-24781/Abexinostat prior to the start of Cycle 1, PCI-24781/Abexinostat by mouth twice a day starting 7 days prior to Cycle 1, Day 1 and ending 4 days prior to Cycle 1, Day 1.
Participants will continue taking PCI-24781/Abexinostat on days 1 - 4, 8 - 11, and 15 - 18 of each 28 day cycle, starting with Cycle 1, Day 1. The initial dose level is 60 mg of PCI-2478/Abexinostat by mouth twice daily. The dose level may be escalated based on results of interim data analysis.
Participants will additionally initiate metronomic temozolomide on Cycle 1, Day 1 at a dose of 50 mg/m2, taken by mouth twice daily and continue the PCI-24781/Abexinostat and metronomic temozolomide regimen until disease progression or intolerance. Receives: Drug: PCI 24781; Drug: Temozolomide |
What is being measured
The primary outcome is the main question the study is designed to answer.
Toxicities Associated with PCI-24781/Abexinostat and Metronomic Temozolomide Therapy - Adverse Events and Serious Adverse Events
The incidence of adverse events (AEs) and serious adverse events (SAEs) will be recorded for each dose level cohort. Toxicities will be assessed using the Common Terminology Criteria for Adverse Events (CTCAE) v5.0. Toxicities will be graded on from 1 to 5, with higher numbers indicating a higher severity grade.
Measured: Up to 25 months
Toxicities Associated With PCI-24781/Abexinostat and Metronomic Temozolomide Therapy - Overall
The frequency of overall toxicity occurrence will be categorized by toxicity grades using the Common Terminology Criteria for Adverse Events (CTCAE) v5.0. Toxicities will be graded ranging from 1 to 5, with higher numbers indicating a higher severity grade.
Measured: Up to 25 months
Recommended Dose Determination of PCI-24781/Abexinostat
Participants who either complete the first cycle of treatment or experience a dose-limiting toxicity (DLT) within the first cycle of treatment will be considered evaluable. The target DLT rate for the maximum tolerated dose (MTD) is 0.25. The MTD determination will be based on isotonic regression. The MTD will be defined as the dose for which the isotonic estimate of the DLT rate is closest to the target DLT rate of 0.25. If a tie exists between potential doses the higher dose level will be selected when the isotonic estimate is lower than the target DLT rate and the lower dose level will be selected when the isotonic estimate is greater than or equal to the target DLT rate.
If the observed DLT rate at the current dose is ≤ 0.197, escalate the dose to the next higher dose level. If the observed DLT rate at the current dose is > 0.298, de-escalate the dose to the next lower dose level. Otherwise, stay at the current dose level.
Measured: Up to 20 months
Secondary outcomes (8)
Changes in Acetylation of Peripheral Blood Mononuclear Cell Histones, H3 and H4, During Treatment
Peripheral blood samples collected at baseline and during treatment will be analyzed for changes in acetylation of peripheral blood mononuclear cell (PBMC) histones H3 and H4.
Measured: Up to 20 months
Changes in Acetylation of Histones, H3 and H4, Using Peripheral Blood Exosomes
Peripheral blood samples collected at baseline and during treatment will be analyzed for changes in acetylation of peripheral blood mononuclear cell (PBMC) histones, H3 and H4, using peripheral blood exosomes.
Measured: Up to 20 months
Progression-free Survival
Progression-free survival (PFS), the time from treatment initiation to disease progression, will be estimated using the Kaplan-Meier method.
Measured: 36 months
Overall Survival (OS)
Overall survival (OS), the time from treatment initiation to death from any cause, will be estimated using the Kaplan-Meier method.
Measured: 36 months
Descriptive examination of patient quality of life during treatment (EORTC QLQ-C30)
Participant Quality of Life (QOL) will be measured throughout treatment using the European Organization for the Research and Treatment of Cancer Quality of Life (EORTC QLQ-BN30) questionnaire. Question responses range from 1 (Not at All) to 4 (Quite a Bit). Higher scores indicate greater functioning. Two additional questions ask participants to rate overall health and quality of life using a scale ranging from 1 to 7, where higher numbers indicate more favorable outcomes.
Measured: 24 months
Descriptive Examination of Participant Quality of Life During Treatment (EORTC QLQ-BN20)
Participant Quality of Life (QOL) will be measured throughout treatment using the European Organization for the Research and Treatment of Cancer Quality of Life (EORTC QLQ-BN20) questionnaire. Question responses range from 1 (Not at All) to 4 (Quite a Bit). Higher scores indicate greater functioning.
Measured: 24 months
Measurement of Tumor Response
Magnetic resonance imaging (MRI) and clinical features will be used to classify tumor response as one of four categories that range from complete response to disease progression. The overall response will be assessed using Response Assessment in Neuro-Oncology (RANO) Criteria.
Measured: Up to 36 months
Correlation of Molecular Profiles With Tumor Response
The correlation of tumor response and peripheral blood mononuclear cells (PBMC) and exosomes extracted from peripheral blood samples will be determined.
Measured: Up to 36 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 Jan 2023
- Study start26 Jun 2023
- Primary completionJul 2027 (estimated)
- Study completionJul 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Recurrent High Grade GliomaStudies of the same condition, open and under way.
- More trials run by University of NebraskaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 24 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University of Nebraska
- Sponsor type
- University, hospital or other
- Collaborators
- Xynomic Pharmaceuticals, Inc.
- Responsible party
- Sponsor
- Investigators
- Nicole A Shonka, MD, Principal investigator, University of Nebraska
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05698524
- Sponsor's protocol ID
- 0809-22-FB
- Status last verified
- Sep 2026
- First submitted
- 20 Dec 2022
- Last updated
- 14 Sep 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 14 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase I Study of Metronomic Temozolomide With Abexinostat (PCI-24781) for Patients With Recurrent High Grade Glioma
- ClinicalTrials.gov ID
- NCT05698524
- Acronym / sponsor ID
- 0809-22-FB
- Conditions
- Recurrent High Grade Glioma, Anaplastic Astrocytoma, Anaplastic Oligodendroglioma, Glioblastoma, Gliosarcoma
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 24 participants (estimated)
- Lead sponsor
- University of NebraskaUniversity, hospital or other
- Collaborators
- Xynomic Pharmaceuticals, Inc.
- Study start
- 26 Jun 2023 (actual)
- Primary completion
- Jul 2027 (estimated)
- Study completion
- Jul 2027 (estimated)
- First posted
- 26 Jan 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Glioblastoma (GBM), WHO grade IV glioma, represents the majority of adult malignant primary brain tumors, with an incidence of 2-3 per 100,000 person-years. The survival for GBM has increased in the last decade but is still low with a median survival of 15-18 months. Recurrence after initial standard therapy, radiation therapy and chemotherapy with temozolomide, few options are available. Even with further therapy, median progression free survival at 6 months after first relapse (PFS-6) is only 15%. Similarly, anaplastic astrocytoma and anaplastic oligodendroglioma, grade III gliomas, once recurrent after radiation therapy and first-line chemotherapy, have identical therapeutic options and poor outcomes with PFS-6 of 31%. Temozolomide (TMZ) has a favorable side effect profile and is available orally, however, cytotoxicity occurs. Metronomic temozolomide at low doses on a continuous schedule, have demonstrated better survival in studies. This study will determine the recommended dose and the side effects of PCI-24781/Abexinostat with metronomic temozolomide.
Detailed description
Glioblastoma (GBM), WHO grade IV glioma, represents the majority of adult malignant primary brain tumors, with an incidence of 2-3 per 100,000 person-years. The survival for GBM has increased in the last decade but is still low with a median survival of 15-18 months. Recurrence after initial standard therapy, radiation therapy and chemotherapy with temozolomide, few options are available. Even with further therapy, median progression free survival at 6 months after first relapse (PFS-6) is only 15%. Similarly, anaplastic astrocytoma and anaplastic oligodendroglioma, grade III gliomas, once recurrent after radiation therapy and first-line chemotherapy, have identical therapeutic options and poor outcomes with PFS-6 of 31%. Temozolomide (TMZ) has a favorable side effect profile and is available orally, however, cytotoxicity occurs. Metronomic temozolomide at low doses on a continuous schedule, have demonstrated better survival in studies.
Participants will be enrolled to one of each of four dose levels in cohorts of 3. Dose level escalation/de-escalation will follow Bayesian Optimal Interval (BOIN) design rules based on analysis of dose-limiting toxicities (DLTs) that occur within the first cycle of protocol treatment. Protocol treatment will continue until disease progression or intolerable toxicity. Dose Levels: 1 - 60 mg PCI-24781/Abexinostat two times daily (BID), 1.5 - 80 mg PCI-24781/Abexinostat BID, 2 - 100 mg PCI-24781/Abexinostat BID, and 3 - 140 mg PCI-24781/Abexinostat BID.
The primary study objective is to evaluate the toxicities and determine the recommended dose of PCI-24781/Abexinostat with metronomic temozolomide in participants with recurrent high grade glioma, [grade III or IV glioma (glioblastoma, gliosarcoma, anaplastic astrocytoma, anaplastic oligodendroglioma)]. Other objects are to evaluate changes in the acetylation of peripheral blood mononuclear cell (PBMC) histones H3 and H4 during treatment, evaluate acetylation of histones H3 and H4 using peripheral blood exosomes, evaluate progression-free and overall survival of participants with recurrent high grade glioma treated with therapy with PCI-24781/Abexinostat and metronomic temozolomide, descriptively examine quality of life (QOL) using EORTC QLQ-C30 questionnaire and QLQ-BN20 questionnaire during treatment, characterize the pharmacokinetics (PK) of PCI-24781/Abexinostat, temozolomide, and the combination of the 2 drugs, measure tumor response, and correlate molecular profiles with tumor response.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Single arm | Experimental | Drug: PCI 24781, Drug: TemozolomideParticipants will receive a combination of PCI-24781/Abexinostat and temozolomide: loading dose of PCI-24781/Abexinostat prior to the start of Cycle 1, PCI-24781/Abexinostat by mouth twice a day starting 7 days prior to Cycle 1, Day 1 and ending 4 days prior to Cycle 1, Day 1. Participants will continue taking PCI-24781/Abexinostat on days 1 - 4, 8 - 11, and 15 - 18 of each 28 day cycle, starting with Cycle 1, Day 1. The initial dose level is 60 mg of PCI-2478/Abexinostat by mouth twice daily. The dose level may be escalated based on results of interim data analysis. Participants will additionally initiate metronomic temozolomide on Cycle 1, Day 1 at a dose of 50 mg/m2, taken by mouth twice daily and continue the PCI-24781/Abexinostat and metronomic temozolomide regimen until disease progression or intolerance. |
Who may qualify
- Ages
- 19 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (12 listed)
- Pathologically proven diagnosis of high grade (aka grade III or IV) glioma (anaplastic astrocytoma, anaplastic oligodendroglioma, glioblastoma, gliosarcoma)
- Prior radiation therapy and standard temozolomide; additional therapies for previous progressions are eligible (prior bevacizumab and Optune are allowed)
- Three or more months from the end of chemoradiotherapy or have biopsy or imaging consistent with disease progression
- 19 years of age or older (the age of consent in Nebraska)
- Fully recovered from any toxicity of prior therapy that, in the opinion of the investigator, could impact tolerance to the study drug
Key exclusion criteria (33 listed)
- 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 PCI-24781/Abexinostat, or put the study outcomes at undue risk
- Significant cardiovascular disease such as uncontrolled or symptomatic arrhythmia, congestive heart failure, or myocardial infarction within 6 months of screening, or any Class 3 or 4 cardiac disease as defined by the New York Heart Association Functional Classification
- Malabsorption syndrome, disease significantly affecting gastrointestinal function, or resection of the stomach or small bowel or ulcerative colitis, symptomatic inflammatory bowel disease, or partial or complete bowel obstruction
- Immunotherapy, chemotherapy, radiotherapy, corticosteroids (at dosages equivalent to prednisone > 20 mg/day) or experimental therapy (other than PCI-24781/Abexinostat PO) within 4 weeks before first dose of study drug
- Concurrent use of enzyme-inducing antiepileptic drugs (phenytoin, phenobarbital, carbamazepine, felbamate, topiramate and oxcarbazepine)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| PCI 24781Also: AbexinostatParticipants will take PCI-24781/Abexinostat on days 1 - 4, 8 - 11, and 15 - 18 of each 28-day cycle. | Drug | Single arm |
| TemozolomideAlso: TemodarParticipants will receive temozolomide at a dose of 50 mg/mg2, taken by mouth once daily. | Drug | Single arm |
Primary outcome
Toxicities Associated with PCI-24781/Abexinostat and Metronomic Temozolomide Therapy - Adverse Events and Serious Adverse Events
Time frame: Up to 25 months
The incidence of adverse events (AEs) and serious adverse events (SAEs) will be recorded for each dose level cohort. Toxicities will be assessed using the Common Terminology Criteria for Adverse Events (CTCAE) v5.0. Toxicities will be graded on from 1 to 5, with higher numbers indicating a higher severity grade.
Toxicities Associated With PCI-24781/Abexinostat and Metronomic Temozolomide Therapy - Overall
Time frame: Up to 25 months
The frequency of overall toxicity occurrence will be categorized by toxicity grades using the Common Terminology Criteria for Adverse Events (CTCAE) v5.0. Toxicities will be graded ranging from 1 to 5, with higher numbers indicating a higher severity grade.
Recommended Dose Determination of PCI-24781/Abexinostat
Time frame: Up to 20 months
Participants who either complete the first cycle of treatment or experience a dose-limiting toxicity (DLT) within the first cycle of treatment will be considered evaluable. The target DLT rate for the maximum tolerated dose (MTD) is 0.25. The MTD determination will be based on isotonic regression. The MTD will be defined as the dose for which the isotonic estimate of the DLT rate is closest to the target DLT rate of 0.25. If a tie exists between potential doses the higher dose level will be selected when the isotonic estimate is lower than the target DLT rate and the lower dose level will be selected when the isotonic estimate is greater than or equal to the target DLT rate. If the observed DLT rate at the current dose is ≤ 0.197, escalate the dose to the next higher dose level. If the observed DLT rate at the current dose is > 0.298, de-escalate the dose to the next lower dose level. Otherwise, stay at the current dose level.
8 secondary outcomes
Changes in Acetylation of Peripheral Blood Mononuclear Cell Histones, H3 and H4, During Treatment
Time frame: Up to 20 months
Changes in Acetylation of Histones, H3 and H4, Using Peripheral Blood Exosomes
Time frame: Up to 20 months
Progression-free Survival
Time frame: 36 months
Overall Survival (OS)
Time frame: 36 months
Descriptive examination of patient quality of life during treatment (EORTC QLQ-C30)
Time frame: 24 months
Descriptive Examination of Participant Quality of Life During Treatment (EORTC QLQ-BN20)
Time frame: 24 months
Measurement of Tumor Response
Time frame: Up to 36 months
Correlation of Molecular Profiles With Tumor Response
Time frame: Up to 36 months
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 14 Sep 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Nicole A Shonka, MD principal investigator
University of Nebraska
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing PCI 24781 and Temozolomide in people with Recurrent High Grade Glioma and Anaplastic Astrocytoma, run by University of Nebraska at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 12 inclusion and 33 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 14 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Michaela K Savine, RN (402-836-9488, misavine@unmc.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Toxicities Associated with PCI-24781/Abexinostat and Metronomic Temozolomide Therapy - Adverse Events and Serious Adverse Events (time frame: Up to 25 months). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 Sep 2026.