ClinicalTrials.gg
WithdrawnNCT06393751Updated Jun 3, 2025

Testing the Addition of ASTX660 (Tolinapant) to the Usual Chemotherapy Treatment (Paclitaxel With or Without Bevacizumab) in Patients With Recurrent Ovarian Cancer

A Phase 1/2 interventional study of Bevacizumab and Biospecimen Collection in Platinum-Refractory Fallopian Tube Carcinoma, Platinum-Refractory Ovarian Carcinoma and Platinum-Refractory Primary Peritoneal Carcinoma, sponsored by National Cancer Institute (NCI). Withdrawn. Open to female participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-06-03.

Sponsored by National Cancer Institute (NCI) · Phase 1/2, Interventional, and Treatment

Why this study was withdrawn
Other - Protocol moved to Withdrawn
Phase
Phase 1/2
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
18 Years and older
Sex
Female
01

Study summary

This phase I/II trial tests the safety, best dose and effectiveness of adding tolinapant (ASTX660) to paclitaxel with or without bevacizumab in treating patients with ovarian cancer that has come back after a period of improvement (recurrent). Tolinapant may stop the growth of tumor cells by blocking proteins, such as XIAP and cIAP1, that promote the growth of tumor cells and increase resistance to chemotherapy. Paclitaxel is in a class of medications called antimicrotubule agents. It stops tumor cells from growing and dividing and may kill them. Bevacizumab is in a class of medications called antiangiogenic agents. It works by stopping the formation of blood vessels that bring oxygen and nutrients to the tumor. This may slow the growth and spread of tumor cells. Adding ASTX660 to paclitaxel with or without bevacizumab may be safe, tolerable and/or effective in treating patients with recurrent ovarian cancer.

Read the detailed description

PRIMARY OBJECTIVES:

I. To assess the safety and tolerability of adding ASTX660 (tolinapant) to a regimen of weekly paclitaxel with bevacizumab. (Phase I) II. To determine the recommended phase 2 dose (RP2D) for the combination of ASTX660 (tolinapant) and weekly paclitaxel with bevacizumab. (Phase I) III. To assess the efficacy of adding ASTX660 (tolinapant) to weekly paclitaxel, with or without bevacizumab (investigator choice), as measured by progression free survival (PFS). (Phase II)

SECONDARY OBJECTIVES:

I. To assess the objective response rate (ORR) of the addition of ASTX660 (tolinapant) to weekly paclitaxel with or without bevacizumab as compared to weekly paclitaxel with or without bevacizumab.

II. To assess overall survival.

EXPLORATORY OBJECTIVE:

I. To explore whether lack of cIAP1 expression results in no benefit for the addition of ASTX660 (tolinapant) to weekly paclitaxel +/- bevacizumab.

OUTLINE: This is a phase I, dose escalation study of ASTX660 and paclitaxel with or without bevacizumab followed by a dose expansion study. The phase II study will follow completion of the phase I study.

PHASE I:

Patients receive paclitaxel intravenously (IV) on days 1, 8 and 15, bevacizumab IV on days 1 and 15, and ASTX660 orally (PO) on days 1-7 and 15-21 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection, computed tomography (CT) and magnetic resonance imaging (MRI) throughout the study.

PHASE II: Patients are randomized to 1 of 2 arms.

ARM I (CONTROL): Patients receive paclitaxel IV on days 1, 8, and 15 of each cycle. Patients may also receive bevacizumab IV on days 1 and 15 of each cycle per provider. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection, CT and MRI throughout the study.

ARM II (EXPERIMENTAL): Patients receive paclitaxel IV on days 1, 8, and 15 and ASTX660 PO on days 1-7 and 15-21 of each cycle. Patients may also receive bevacizumab IV on days 1 and 15 of each cycle per provider. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection, CT and MRI throughout the study.

After completion of study treatment, patients are followed up every 3 months for 2 years then every 6 months for 3 years.

02

Conditions studied

  • Platinum-Refractory Fallopian Tube Carcinoma
  • Platinum-Refractory Ovarian Carcinoma
  • Platinum-Refractory Primary Peritoneal Carcinoma
  • Recurrent Fallopian Tube Adenocarcinoma
  • Recurrent Fallopian Tube Carcinosarcoma
  • Recurrent Fallopian Tube Clear Cell Adenocarcinoma
  • Recurrent Fallopian Tube High Grade Serous Adenocarcinoma
  • Recurrent Fallopian Tube Undifferentiated Carcinoma
  • Recurrent High Grade Endometrioid Adenocarcinoma
  • Recurrent Ovarian Adenocarcinoma
  • Recurrent Ovarian Carcinosarcoma
  • Recurrent Ovarian Clear Cell Adenocarcinoma
  • Recurrent Ovarian High Grade Serous Adenocarcinoma
  • Recurrent Ovarian Seromucinous Carcinoma
  • Recurrent Ovarian Undifferentiated Carcinoma
  • Recurrent Platinum-Resistant Fallopian Tube Carcinoma
  • Recurrent Platinum-Resistant Ovarian Carcinoma
  • Recurrent Platinum-Resistant Primary Peritoneal Carcinoma
  • Recurrent Primary Peritoneal Adenocarcinoma
  • Recurrent Primary Peritoneal Carcinosarcoma
  • Recurrent Primary Peritoneal Clear Cell Adenocarcinoma
  • Recurrent Primary Peritoneal High Grade Serous Adenocarcinoma
  • Recurrent Primary Peritoneal Undifferentiated Carcinoma
03

In context

Adenocarcinoma, Clear Cell

46 studies on the registry are indexed under Adenocarcinoma, Clear Cell; 8 are open to participants now.

Browse Adenocarcinoma, Clear Cell studies →

Lead sponsor

National Cancer Institute (NCI) is the lead sponsor of 3,556 studies on the registry; 336 are open to participants now.

Of its 411 completed or terminated interventional studies of FDA-regulated products, 373 (91%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Pathologically (histologically or cytologically) proven diagnosis of high grade epithelial ovarian, fallopian tube, or primary peritoneal cancer. Required: submission of pathology report

    • Patients with the following histologic cell types are eligible:

      • High grade serous
      • Endometrioid, grade 3
      • Clear cell
      • Undifferentiated
      • Mixed epithelial
      • Carcinosarcoma
      • Adenocarcinoma, not otherwise specified (NOS)
  • Patients must be considered to have platinum-resistant or platinum- recurrent ovarian cancer to be enrolled in this trial

    • Platinum-resistant disease is defined as progression within \< 6 months from completion of platinum-based therapy. The date should be calculated from the last administered dose of platinum therapy
    • Platinum-refractory disease is defined as progression within 30 days of completing the last dose of platinum during initial therapy. The date should be calculated from the last administered dose of platinum therapy
  • Patients must have evaluable disease or defined by (RECIST) version (v) 1.1. Measurable disease is defined as at least one lesion that can be accurately measured in at least one dimension (longest diameter to be recorded). Each lesion must be ≥ 10 mm when measured by CT or MRI. Lymph nodes must be ≥ 15 mm in short axis when measured by CT or MRI. Previously irradiated lesions can be considered as measurable disease only if progressive disease has been unequivocally documented at that site since radiation
  • Patients with treated are eligible if follow up brain imaging after central nervous system (CNS) directed therapy shows no evidence of progression
  • Patients must have received ≥ 1 platinum-based therapy and not more than 5 . Notes:

    • /neoadjuvant therapy is counted as only 1 regimen in the absence of intervening progression.
    • Maintenance therapy (e.g., bevacizumab, poly adenosine diphosphate-ribose polymerase [PARP] inhibitor will be considered part of the preceding line of therapy [i.e., not counted independently])
    • Therapy changed due to toxicity in the absence of progression will be considered part of the same line (i.e., not counted independently)
    • Hormonal therapy will not be counted as a separate line of therapy
  • Age ≥ 18
  • (ECOG) performance status ≤ 2
  • (ANC) ≥ 1,500 cells/mm\^3
  • ≥ 100,000 cells/mm\^3
  • ≥ 8 g/dl
  • Creatinine ≤ institutional (ULN), OR calculated (CrCL) of ≥ 50 mL/min by the Cockcroft-Gault formula
  • Total ≤ 1.5 x institutional upper limit of normal (ULN) (patients with known Gilbert's disease who have bilirubin level ≤ 3 x ULN may be enrolled)
  • (AST) and alanine aminotransferase (ALT) ≤ 3 x institutional ULN
  • Patients with a known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the Functional Classification. To be eligible for this trial, patients should be class 2B or better
  • Patients with a prior or concurrent whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the regimen are eligible for this trial
  • The patient or a legally authorized representative must provide study-specific prior to study entry and, for patients treated in the United States (U.S.), authorization permitting release of personal health information
  • No active infection requiring parental antibiotics
  • No evidence of intra-abdominal abscess, abdominal/pelvic fistula, gastrointestinal perforation, gastrointestinal (GI) obstruction, and/or with drainage gastrostomy tube required. NOTE: required interval since last bowel obstruction: 30 day minimum for incomplete obstruction, resolved with conservative means; 6 months for fistula

Exclusion criteria

Exclusion Criteria:

  • Patients who have received prior weekly paclitaxel in a platinum-resistant setting
  • Major surgical procedure within 28 days prior to registration, or anticipation of need for major surgical procedure during the study. Note: Placement of a vascular access device, thoracentesis, and/or paracentesis will not be considered major surgery
  • Women who are pregnant or are unwilling to discontinue nursing
  • Evidence of bleeding diathesis or coagulopathy within the past 3 months. Patients are not excluded for past or current use of anticoagulation
  • Uncontrolled hypertension (systolic blood pressure [SBP] > 150 and/or diastolic blood pressure [DBP] > 90)
  • Patients currently taking and unwilling/unable to discontinue the use of drugs that are known to inhibit or induce P-glycoprotein (gp)
Terms in these criteria, in plain language(19)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

RECIST

The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.

“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.

Brain metastases

Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).

Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.

Line of therapy

A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.

“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.

Adjuvant and neoadjuvant

Neoadjuvant treatment is given before the main treatment (usually surgery), often to shrink a tumour. Adjuvant treatment is given after it, to lower the chance of the cancer coming back.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Creatinine clearance (CrCl)

How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
0 participants (actual)

Study arms

  • Experimental
    Phase I (paclitaxel, tolinapant, bevacizumab)

    Patients receive paclitaxel IV on days 1, 8 and 15, bevacizumab IV on days 1 and 15, and ASTX660 PO on days 1-7 and 15-21 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection, CT and MRI throughout the study.

    Biological: Bevacizumab · Procedure: Biospecimen Collection · Procedure: Computed Tomography · Procedure: Magnetic Resonance Imaging · Drug: Paclitaxel · Drug: Tolinapant

  • Active comparator
    Phase II, Arm I (paclitaxel, bevacizumab)

    Patients receive paclitaxel IV on days 1, 8, and 15 of each cycle. Patients may also receive bevacizumab IV on days 1 and 15 of each cycle per provider. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection, CT and MRI throughout the study.

    Biological: Bevacizumab · Procedure: Biospecimen Collection · Procedure: Computed Tomography · Procedure: Magnetic Resonance Imaging · Drug: Paclitaxel

  • Experimental
    Phase II, Arm II (paclitaxel, tolinapant, bevacizumab)

    Patients receive paclitaxel IV on days 1, 8, and 15 and ASTX660 PO on days 1-7 and 15-21 of each cycle. Patients may also receive bevacizumab IV on days 1 and 15 of each cycle per provider. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection, CT and MRI throughout the study.

    Biological: Bevacizumab · Procedure: Biospecimen Collection · Procedure: Computed Tomography · Procedure: Magnetic Resonance Imaging · Drug: Paclitaxel · Drug: Tolinapant

Interventions

  • BiologicalBevacizumab

    Given IV

    Also known as: ABP 215, ABP-215, ABP215, Alymsys, Anti-VEGF, Anti-VEGF Humanized Monoclonal Antibody, Anti-VEGF Monoclonal Antibody SIBP04, Anti-VEGF rhuMAb, Avastin, Avzivi, Aybintio, BAT 1706, BAT-1706, BAT1706, BAT1706 Biosimilar, Bevacizumab awwb, Bevacizumab Biosimilar ABP 215, Bevacizumab Biosimilar BAT1706, Bevacizumab Biosimilar BEVZ92, Bevacizumab Biosimilar BI 695502, Bevacizumab Biosimilar CBT 124, Bevacizumab Biosimilar CT-P16, Bevacizumab Biosimilar FKB238, Bevacizumab Biosimilar GB-222, Bevacizumab Biosimilar HD204, Bevacizumab Biosimilar HLX04, Bevacizumab Biosimilar IBI305, Bevacizumab Biosimilar LY01008, Bevacizumab Biosimilar MB02, Bevacizumab Biosimilar MIL60, Bevacizumab Biosimilar Mvasi, Bevacizumab Biosimilar MYL-1402O, Bevacizumab Biosimilar QL 1101, Bevacizumab Biosimilar QL1101, Bevacizumab Biosimilar RPH-001, Bevacizumab Biosimilar SCT501, Bevacizumab Biosimilar Zirabev, Bevacizumab-adcd, Bevacizumab-awwb, Bevacizumab-aybi, Bevacizumab-bvzr, Bevacizumab-equi, Bevacizumab-maly, Bevacizumab-onbe, Bevacizumab-tnjn, BP102, BP102 Biosimilar, CT P16, CT-P16, CTP16, Equidacent, FKB 238, FKB-238, FKB238, HD204, Immunoglobulin G1 (Human-Mouse Monoclonal rhuMab-VEGF Gamma-Chain Anti-Human Vascular Endothelial Growth Factor), Disulfide With Human-Mouse Monoclonal rhuMab-VEGF Light Chain, Dimer, MB 02, MB-02, MB02, Mvasi, MYL-1402O, Onbevzi, Oyavas, PF 06439535, PF-06439535, PF06439535, QL1101, Recombinant Humanized Anti-VEGF Monoclonal Antibody, rhuMab-VEGF, SCT501, SIBP 04, SIBP-04, SIBP04, Vegzelma, Zirabev

  • ProcedureBiospecimen Collection

    Undergo blood sample collection

    Also known as: Biological Sample Collection, Biospecimen Collected, Specimen Collection

  • ProcedureComputed Tomography

    Undergo CT

    Also known as: CAT, CAT Scan, Computed Axial Tomography, Computerized Axial Tomography, Computerized axial tomography (procedure), Computerized Tomography, Computerized Tomography (CT) scan, CT, CT Scan, tomography

  • ProcedureMagnetic Resonance Imaging

    Undergo MRI

    Also known as: Magnetic Resonance, Magnetic Resonance Imaging (MRI), Magnetic resonance imaging (procedure), Magnetic Resonance Imaging Scan, Medical Imaging, Magnetic Resonance / Nuclear Magnetic Resonance, MR, MR Imaging, MRI, MRI Scan, MRIs, NMR Imaging, NMRI, Nuclear Magnetic Resonance Imaging, sMRI, Structural MRI

  • Given IV

    Also known as: Anzatax, Asotax, Bristaxol, Praxel, Taxol, Taxol Konzentrat

  • Given PO

    Also known as: ASTX 660, ASTX660, XIAP/cIAP1 Antagonist ASTX660

06

What researchers measure

Primary outcomes

  1. Incidence of dose-limiting toxicity (Phase I)

    Assessed using the Bayesian Optimal Interval design. Toxicity will be graded using National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version (v)5.0.

    Time frame: At 28 days

  2. Progression free survival (PFS) (Phase II)

    The primary hypothesis test will be based on a logrank test, stratified on factors declared at randomization. The PFS hazard ratio will be estimated by Cox regression, stratified by factors declared at randomization. The treatment hazard ratio estimates and their 95% confidence intervals will be estimated using proportional hazards models specified to be consistent with the logrank tests.

    Time frame: At randomization to progressive disease or death, assessed up to 5 years after completion of study treatment

Secondary outcomes

  1. Incidence of adverse events (AEs)

    AEs will be defined as any untoward medical occurrence associated wtih the use of a drug in humans, whether or not considered drug related. AEs will be graded using NCI CTCAE v5.0. All AEs will be summarized.

    Time frame: Up to 30 days after last dose of study treatment

  2. Overall survival (OS)

    OS will be defined as the time from randomization to death from any cause. The OS treatment hypothesis will be based on a logrank test, stratified by the factors specified at randomization. Comparisons of the OS distributions by treatment arm will be described using Kaplan-Meier methods. Treatment hazard ratio estimates and their 95% confidence intervals will be estimated using a multivariable proportional hazards model specified with main effects for the randomization treatment assignment and stratified by the factors declared at randomization.

    Time frame: At randomization to death, assessed up to 5 years after completion of study treatment

  3. Objective response rate (ORR)

    ORR will be defined as the binomial proportion of evaluable patients with a best overall response of complete response (CR) or partial response (PR) by Response Evaluation Criteria in Solid Tumors. The ORR estimates by treatment arm will be supported by their 2-sided, 95% Wilson-Score confidence intervals. The relative odds of response in the experimental arm will be estimated using a multivariable logistic regression model specified with main effects for the treatment groups and stratified by the stratification factors reported at baseline.

    Time frame: At start of treatment to disease progression/recurrence, assessed up to 5 years after completion of treatment

  4. Duration of response (DOR)

    DOR will be defined as the time from first documentation of either PR or CR until disease progression or death, whichever is observed first. Treatment group differences in response duration will be graphed using Kaplan-Meier methods and compared using logrank tests, stratified by the factors declared at randomization. The relative hazards of progression or death in each group will be estimated using similarly stratified proportional hazards regression model specified with main effects for the treatment indicator.

    Time frame: At first response to progression or death, assessed up to 5 years after completion of study treatment

Other outcomes

  1. Lack of cIAP1 expression

    Will evaluate whether lack of cIAP1 expression results in no benefit for the addition of ASTX660 to weekly paclitaxel. The null hypothesis of no predictive effect of cIAP1 on clinical outcomes will be assessed using the type 3 score test for the interaction of the randomized treatment assignment and the patient-level cIAP1 histopathological-score classification (positive, reference negative). The type 3 test result will be obtained from a multivariable Cox regression model model specified with main effects for the randomized treatment assignment and the cIAP1 classification (negative/positive), and the interaction term. The model may be stratified by bevacizumab use. Treatment hazard ratios and 95% confidence intervals will be estimated within the cIAP1 subgroups, and graphed in a forest plot to assess qualitative interactions.

    Time frame: Up to 5 years after completion of study treatment

  2. ORR (Phase I/Ib)

    ORR will be compared among patients enrolled in the phase I/Ib parts of the trial. Treatment effect estimates of clinical benefit will be descriptive.

    Time frame: Up to 5 years after completion of study treatment

  3. PFS (Phase I/Ib)

    PFS will be compared among patients enrolled in the phase I/Ib parts of the trial. Treatment effect estimates of clinical benefit will be descriptive. Dose level effects on PFS will be described using Kaplan Meier methods. Treatment effectiveness will be quantified using estimates for the proportion of patients who are alive without documented progression 6 months after starting treatment.

    Time frame: Up to 6 months after starting treatment

  4. OS (Phase I/Ib)

    OS will be compared among patients enrolled in the phase I/Ib parts of the trial. Treatment effect estimates of clinical benefit will be descriptive. Dose level effects on oS will be described using Kaplan Meier methods. Treatment effectiveness will be quantified using estimates for the proportion of patients who are alive 6 months after starting treatment.

    Time frame: Up to 6 months after starting treatment

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: Yes — NCI is committed to sharing data in accordance with NIH policy. For more details on how clinical trial data is shared, access the link to the NIH data sharing policy page.

Data sharing details ↗ · grants.nih.gov

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for Oct 2025; primary completion for Feb 2028, 27 months later.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 30, 2024
First posted
May 1, 2024
StartEst.
Oct 31, 2025
Primary completionEst.
Feb 9, 2028
CompletionEst.
Feb 9, 2028
Last update
Jun 3, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 3, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06393751
Responsible party
Sponsor
First posted
May 1, 2024
Start date
Oct 31, 2025 (estimated)
Primary completion
Feb 9, 2028 (estimated)
Completion
Feb 9, 2028 (estimated)
Last update
Jun 3, 2025

Study contacts

Kristen P Zeligs
principal investigator · NRG Oncology

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in Jun 2025. You cannot join it, but the record below documents what was studied.

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Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

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Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Studies of the drug tested here: ASTX-660

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