Frontlight ResearchEarly access
TerminatedPhase 3
A Study Comparing Abelacimab to Apixaban in the Treatment of Cancer-associated VTE
Key facts
- Who runs it
- Anthos Therapeutics, Inc.
- Where
- Aurora, Boston, Cleveland, Commack, Detroit, Durham, Evanston, Harrison, Houston, La Crosse, Lexington, Miami, Middletown, Milwaukee, New York, Oklahoma City, Philadelphia, Rochester, San Antonio, St Louis, Washington D.C., and West Haven, United StatesSee the 23 sitesAlso in 20 other countries, 186 sites
- Status
- Terminated
- Phase
- Phase 3
- People taking part
- 1,150 people enrolled
- Started
- 5 May 2022
- Ended
- 4 Feb 2026
- Type of study
- Interventional, 2 groupsOne group gets an existing treatment, for comparison.
- Treatments tested
- Abelacimab
- Apixaban
- Record updated
- 23 February 2026
- Why it stopped
- Sponsor decision
Who can take part
- Age
- 18 years and older
- Sex
- Women and men
- Healthy volunteers
- Cannot take part
The registry criteria, word for word
Show all 30 criteriaShow less
Who can take part
- Male or female subjects ≥18 years old or other legal maturity age according to the country of residence
- Confirmed diagnosis of cancer (by histology, adequate imaging modality), other than basal-cell or squamous-cell carcinoma of the skin alone with one of the following:; Active cancer, defined as either locally active, regionally invasive, or metastatic cancer at the time of randomization and/or; Currently receiving or having received anticancer therapy (radiotherapy, chemotherapy, hormonal therapy, any kind of targeted therapy or any other anticancer therapy) in the last 6 months
- Confirmed symptomatic or incidental proximal lower limb deep vein thrombosis (DVT) (i.e., popliteal, femoral, iliac, and/or inferior vena cava [IVC] thrombosis) and/or a confirmed symptomatic pulmonary embolism (PE), or an incidental PE in a segmental, or larger pulmonary artery; Patients are eligible within 120 hours from diagnosis of the qualifying VTE
- Anticoagulation therapy with a therapeutic dose of DOAC for at least 6 months is indicated
- Able to provide written informed consent
Who cannot take part
- More than 120 hours of pre-treatment with therapeutic doses of UFH, LMWH, fondaparinux, DOAC, or other anticoagulants
- An indication to continue treatment with therapeutic doses of an anticoagulant other than that VTE treatment prior to randomization (e.g., atrial fibrillation [AF], mechanical heart valve, prior VTE)
- Brain trauma or a cerebral or spinal cord surgery or spinal procedures such as lumbar puncture or epidural/spinal anesthesia within 4 weeks of screening
- Patients known to be receiving strong dual inducers or inhibitors of both CYP3A4 and P gp
- Use of other investigational (not registered) drugs within 5 half-lives prior to enrollment or until the expected pharmacodynamic(s) (PD) effect has returned to baseline, whichever is longer. Participation in academic non-interventional studies or interventional studies, comprising testing different strategies or different combinations of registered drugs is permitted
- Acute ischemic or hemorrhagic stroke or intracranial hemorrhage within the 4 weeks preceding screening
- Primary brain cancer or untreated intracranial metastases at baseline
- Bleeding requiring medical attention at the time of randomization or in the preceding 4 weeks
- Planned brain, spinal cord, cardiac, vascular, major thoracic and/or major abdominal surgery in the 4 weeks following randomization
- Uncontrolled hypertension (systolic BP>180 mm Hg or diastolic BP >100 mm Hg despite antihypertensive treatment)
- History of hypersensitivity to any of the study drugs (including apixaban) or excipients, to drugs of similar chemical classes, or any contraindication listed in the label for apixaban
- Subjects with any condition that in the Investigator's judgement would place the subject at increased risk of harm if he/she participated in the study
- Platelet count <50,000/mm3 at the screening visit
- Calculated creatinine clearance (CrCl) <30 mL/min (Cockcroft-Gault equation) at the screening visit
- Hemoglobin <8 g/dL at the screening visit
- Acute hepatitis, chronic active hepatitis, liver cirrhosis; or an alanine aminotransferase (ALT) ≥3 x and/or bilirubin ≥2 x upper limit of normal (ULN) at the screening visit in absence of clinical explanation
- Thrombectomy, insertion of a caval filter or use of a fibrinolytic agent to treat the current (index) DVT and/or PE
- PE leading to hemodynamic instability (blood pressure [BP] <90 mmHg or shock)
- Need for aspirin in a dosage of >100 mg/day or any other antiplatelet agent alone or in combination with aspirin
- Acute myeloid or lymphoid leukemia
- Eastern Cooperative Oncology Group (ECOG) performance status of 3 or 4 at screening
- Life expectancy <3 months at randomization
- Women of child-bearing potential (WOCBP) who are unwilling or unable to use highly effective contraceptive measures during the study from screening up to 3 days after last treatment of apixaban or 100 days after administration of abelacimab (See Section 5.3.6. for highly effective contraceptive measures)
- Sexually active males with sexual partners of childbearing potential must agree to use a condom or other reliable contraceptive measure up to 3 days after last treatment of apixaban or 100 days after administration of abelacimab
- Pregnant or breast-feeding women
Where in United States
Also in 20 other countries, 186 sites
- University of Colorado Anschutz Medical CampusAurora, United States
- Beth Israel Deaconess Medical CenterBoston, United States
- Brigham and Women's HospitalBoston, United States
- Cleveland Clinic FoundationCleveland, United States
- Memorial Sloan Kettering Cancer Center - CommackCommack, United States
- Henry Ford Health SystemDetroit, United States
- Duke University Medical CenterDurham, United States
- Northshore University Health SystemEvanston, United States
- Memorial Sloan Kettering Cancer Center West HarrisonHarrison, United States
- MD Anderson Cancer CenterHouston, United States
- Gundersen Health SystemLa Crosse, United States
- University of Kentucky/Markey Cancer CenterLexington, United States
- University of Miami HealthMiami, United States
- Memorial Sloan Kettering Cancer Center-MiddletownMiddletown, United States
- Blood Center of WisconsinMilwaukee, United States
- Memorial Sloan-Kettering Cancer CenterNew York, United States
- University of Oklahoma Health Sciences CenterOklahoma City, United States
- University of Pennsylvania - Penn Blood Disorders CenterPhiladelphia, United States
- Lipson Cancer InstituteRochester, United States
- University of Texas Mays Cancer CenterSan Antonio, United States
- Washington UniversitySt Louis, United States
- Washington DC VAMCWashington D.C., United States
- VA Connecticut Healthcare SystemWest Haven, United States
About the trial
What the trial wants to find out
This is a Phase 3,multicenter, randomized, open-label, blinded endpoint evaluation study comparing the effect of abelacimab relative to apixaban on venous thromboembolism (VTE) recurrence and bleeding in patients with cancer associated VTE (ASTER)
The 2 groups in the trial
- AbelacimabTreatment being tested
Abelacimab intravenous administration followed by monthly administration of the same dose subcutaneously
- ApixabanExisting treatment, for comparison
Apixaban administered orally twice a day
Data and sources
- Registry record
- Listed on ClinicalTrials.gov and on the EU's official list of trials (CTIS).
- Official title
- A Multicenter, Randomized, Open-label, Blinded Endpoint Evaluation, Phase 3 Study Comparing the Effect of Abelacimab Relative to Apixaban on Venous Thromboembolism (VTE) Recurrence and Bleeding in Patients With Cancer Associated VTE
- Record updated
- 23 February 2026