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LeiomyosarcomaPhase 2ATX-101NCT05116683

ATX-101 in Advanced Dedifferentiated Liposarcoma and Leiomyosarcoma

A Phase 2 study testing ATX-101 in people with Leiomyosarcoma and Liposarcoma, run by Benjamin Izar at 1 site in United States.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

The purpose of this study is to evaluate the effectiveness of a new investigational drug, ATX-101, for the treatment of dedifferentiated liposarcoma (LPS) and leiomyosarcoma (LMS). ATX-101 is an intravenous (IV) drug which blocks the interaction of a protein called PCNA with a number of "stress response" proteins. Read more about this study

Who is it for?
Ages 18 to 99 years
Conditions the study is for
Leiomyosarcoma, Liposarcoma
What is being tested?
ATX-101
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
4 participants
Where
1 siteUnited States
Study dates
11 Jan 2022to 27 Oct 2022
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

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 18 to 99 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Histologically confirmed dedifferentiated liposarcoma (LPS) or leiomyosarcoma
  • ATX-101 in Sarcoma Phase II
  • (LMS). Pathology review occurs at the center enrolling the patient on this trial.
  • Disease must be locally advanced and unresectable or metastatic. Disease which may be resected but with an associated level of morbidity deemed unacceptable by the treating clinician is considered eligible.
  • Patients must have measurable disease by RECIST criteria version 1.1. In addition, the first 10 patients enrolled on the study must have a site of disease amenable to image-guided biopsy at minimal risk or less, and must agree to undergo this biopsy.
  • Patients must evidence of disease progression, either clinically or radiographically, within the 12 weeks prior to study enrollment, as determined by the investigator enrolling the patient on the study.
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  • Patients must have been treated with at least one prior systemic regimen for advanced sarcoma: LMS: Anthracycline-based chemotherapy, or gemcitabine/docetaxel. LPS: No specification as to the prior treatment received. Neoadjuvant or adjuvant systemic therapy does not qualify as prior treatment unless completed within 6 months of disease relapse.
  • Patients must be age 18 years or older. Because the safety of ATX-101 in patients less than 18 years of age has not been characterized, children are excluded from the present study.
  • Patients must demonstrate an Eastern Cooperative Oncology Group (ECOG) performance status of ≤2.
  • Patients must demonstrate normal organ and marrow function as defined below:
  • Absolute neutrophil count (ANC) ≥ 1,500/mm3
  • Platelet count ≥ 100,000/mm3
  • Creatinine ≤ 1.5 times upper limit of normal OR
  • Calculated creatinine clearance > 45 mL/min*
  • Total bilirubin ≤ 1.5 times upper limit of normal**
  • Aspartate transaminase (AST)/aminotransferase (ALT) ≤ 1.5 times upper limit of normal**
  • Notes: Upper limit of normal is defined by the clinical laboratory performing the test.
  • Using the lean body mass formula only (Modified Cockcroft Gault) ** If transaminase elevation and/or bilirubin elevation is attributed to the presence of liver metastases, a total bilirubin ≤ 2.5 times the upper limit of normal and an AST and ALT ≤ 2.5 times the upper limit of normal are permissible. Patients with an elevated bilirubin level that is attributed to an inherited disorder, such as Gilbert's disease, may be enrolled at the discretion of the principal investigator.
  • The effects of ATX-101 on the developing human fetus are unknown. For this reason, women of child-bearing potential and all men must agree to use adequate contraception (for women: hormonal or barrier method of birth control, abstinence; for men: male condom, prior vasectomy, or abstinence) prior to study entry and for the duration of study participation. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately. Men treated or enrolled on this protocol must also agree to use adequate contraception prior to the study, for the duration of study participation, and 4 months after completion of ATX-101 administration. If patients do not agree to the above, they are not considered eligible.
  • Ability to understand and willingness to sign a written informed consent document.

Who cannot join

  • Patients must not have received treatment with any chemotherapy, immunotherapy, radiotherapy or an investigational agent for malignancy within the 21 days of initiating treatment on this protocol.
  • Patients may not have received treatment with a small molecule targeted agent (including off-label or investigational use) within 14 days of initiating treatment on this protocol, provided this represents at least 7 half-lives for that agent.
  • Toxic effects from any prior therapy (except alopecia) must have resolved to grade 1 or less according to NCI CTCAE v4.0 or to the patient's baseline by the time of initiating treatment on this protocol.
  • Patients may not have uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, uncontrolled cardiac arrhythmia, cerebrovascular accident within the last six months, uncontrolled diabetes mellitus, uncontrolled psychiatric illness or any other disease condition that would limit compliance with study requirements in the opinion of the principal investigator.
  • Patients may not be pregnant or nursing. Pregnant women are excluded from this study because the teratogenic effects of ATX-101 have not been adequately studied. A negative pregnancy test must be documented 7 days or less prior to initiating treatment on this protocol. Because there is an unknown but potential risk for adverse events to nursing infants secondary to treatment of the mother with ATX-101, breastfeeding must be discontinued prior to enrollment.
  • Patients may not have known active hepatitis B or C infection. In patients with a history of hepatitis B or C infection, resolution of infection must be demonstrated by negative serology for hepatitis B surface antigen (HBsAg) and/or negative hepatitis C virus (HCV) RNA.
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  • Patients may not have uncontrolled HIV/AIDS infection. However, HIV positive patients on highly active retroviral therapy (HAART) with an undetectable viral load and CD4 T-cell count above 200 may participate.
  • Anticipated requirement for surgery during the study period or major surgery within 3 weeks of initiating treatment.
  • Active central nervous system (CNS) metastases or leptomeningeal involvement. Patients with known CNS metastases must have received definitive radiotherapy or surgery at least 4 weeks prior to initiating treatment with imaging demonstrating no progression of disease over this interval.

Trial locations and contacts

1 site in 1 country.

United States1 site

  • Columbia University Irving Medical Center / NewYork-Presbyterian

    New York, New York, 10032

Other trials in United States

About this study

Official title: A Phase II Study, With a Safety lead-in, to Evaluate ATX-101, a Peptide Drug Targeting PCNA, in Advanced Dedifferentiated Liposarcoma and Leiomyosarcoma

The purpose of this study is to evaluate the effectiveness of a new investigational drug, ATX-101, for the treatment of dedifferentiated liposarcoma (LPS) and leiomyosarcoma (LMS). ATX-101 is an intravenous (IV) drug which blocks the interaction of a protein called PCNA with a number of "stress response" proteins. These interactions are thought to be important for cancer cell survival and growth. ATX-101 may disrupt these interactions and therefore help treat the cancer. In this study, all patients will receive the same treatment. Most of the exams, tests, and procedures are part of the usual approach to medical care for this condition. However, some additional tests or procedures may be performed, and other tests may be performed more frequently than usual.

Read the detailed description

ATX-101 is a small molecule peptide comprised of a novel human proliferating cell nuclear antigen (PCNA) interacting motif termed APIM coupled to cellular and nuclear delivery domains. PCNA interacts with many cellular proteins and exerts pleiotropic effects in the cancer cell. Proteins that bind to PCNA via APIM are especially important in the cellular stress and DNA damage responses, as well as intracellular signaling, apoptosis, metabolism and anti-tumor immunity. In preclinical studies, ATX-101 demonstrated single-agent activity and potentiated other cytotoxic and targeted agents across multiple cancer models in vitro and in vivo, including LMS and LPS. ATX-101 is currently being evaluated in a phase 1 safety and pharmacokinetic study in solid tumors using a 3 + 3 dose escalation design. As of 10/29/2020, ATX-101 has been evaluated across dose levels of 20 mg/m2 - 60 mg/m2 IV weekly. Although no maximum tolerated dose (MTD) was reached, after review of the available safety data, the RP2D was determined to be 60 mg/m2 IV weekly, with no plans to dose escalate further. ATX-101 has been well tolerated, with no grade 3 or higher adverse events (AEs) observed during the phase 1 study. Common AEs include grade 1/2 infusion related reactions (which have been easily managed with supportive care), mild fatigue and diarrhea. In this study, ATX-101 demonstrated encouraging activity as prolonged disease stabilization in patients with progressive, heavily pre-treated malignancies.

Being tested
ATX-101
Keywords
LMS, LPS, ATX-101
Medical subject headings
Leiomyosarcoma, Liposarcoma

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ATX-101Drug

    Also called ATX-101 drug substance

    Patients will be given ATX-101 at 60 mg/m2 IV weekly in continuous 21 day cycles.

Study groups in NCT05116683
Study groupRoleWhat they receive
ATX-101ExperimentalPatients will be treated with ATX-101 60 mg/m2 IV weekly in continuous 21 day cycles. Patients will receive premedication prior to the ATX-101 infusion to reduce the risk of infusion-related reactions.
Receives: Drug: ATX-101

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Progression Free Rate (PFR)

    The study will evaluate the preliminary efficacy of ATX-101 in advanced L-sarcomas (LMS, LPS) by measuring the PFR (progression free rate) at 12 weeks (PFR12). Progression evaluated using Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 and defined as at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm (the appearance of one or more new lesions is also considered progression).

    Measured: 12 weeks

Secondary outcomes (5)

  1. Number of Adverse Events

    Counted per adverse event basis by grade as evaluated by Common Terminology Criteria for Adverse Events (CTCAE) version 4.0. The higher the grade, the more severe the event.

    Measured: Up to approximately 7 months

  2. Objective Response Rate (ORR)

    The percentage of patients whose cancer shrinks or disappears after treatment. This will be measured by the percentage of patients having a complete or partial response per RECIST Version 1.1. ORR = Complete Response (CR) + Partial Response (PR); CR defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to < 10 mm and PR defined as at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum diameters.

    Measured: Up to approximately 7 months

  3. Duration of the Response

    Duration of response is measured from the time the measurement criteria for an objective response is recorded until the first date that recurrent or progressive disease is objectively documented.

    Measured: Up to approximately 7 months

  4. Median Progression Free Survival (PFS)

    Median time from start treatment until the time of progression or death.

    Measured: Up to approximately 5 months

  5. Median Overall Survival (OS)

    Median time from start of treatment until the time of death from any cause.

    Measured: Up to approximately 7 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Nov 2021
  2. Study start11 Jan 2022
  3. Primary completion27 Oct 2022
  4. Study completion27 Oct 2022

Why it stopped: Study terminated by PI

Resources

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 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
4 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05116683
Sponsor's protocol ID
AAAT7079
Acronym
ATX-101
Status last verified
Nov 2023
First submitted
18 Oct 2021
Last updated
6 Dec 2023
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Sogaard CK, Otterlei M. Targeting proliferating cell nuclear antigen (PCNA) for cancer therapy. Adv Pharmacol. 2024;100:209-246. doi: 10.1016/bs.apha.2024.04.002. Epub 2024 May 14.

    PubMed 39034053

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing ATX-101 in people with Leiomyosarcoma and Liposarcoma, run by Benjamin Izar 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 20 inclusion and 9 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: stopped early, as of the sponsor's last update on 6 Dec 2023. 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 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 6 Dec 2023). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Progression Free Rate (PFR) (time frame: 12 weeks). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05116683, which also lists 1 linked publication.

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 6 Dec 2023.

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