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CompletedNCT03395080P204Updated Aug 1, 2025Results posted

A Study of DKN-01 as a Monotherapy or in Combination With Paclitaxel in Patients With Recurrent Epithelial Endometrial or Epithelial Ovarian Cancer or Carcinosarcoma

A Phase 2 interventional study of Paclitaxel and 300mg DKN-01 in Endometrial Cancer, Uterine Cancer and Ovarian Cancer, sponsored by Leap Therapeutics, Inc.. Completed at 17 sites in United States. Open to female participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-08-01.

Sponsored by Leap Therapeutics, Inc. · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
111
Allocation
Non-randomized
Ages
18 Years and older
Sex
Female
01

Study summary

A Phase 2 Study Evaluating the Efficacy and Safety of DKN-01 as a Monotherapy or in Combination with Paclitaxel in Patients With Recurrent Epithelial Endometrial Cancer, Epithelial Ovarian Cancer, or Carcinosarcoma

Read the detailed description

This study employs a "basket" design to concurrently investigate DKN-01 as monotherapy and in combination with paclitaxel in patients with recurrent epithelial endometrial cancer (EEC), epithelial ovarian cancer (EOC), or carcinosarcoma (malignant mixed Mullerian tumor [MMMT]. Thus, 6 distinct patient groups are being independently investigated:

  1. 300mg DKN-01 monotherapy in recurrent EEC (Group 1)
  2. 300mg DKN-01+paclitaxel in recurrent EEC (Group 2)
  3. 300mg DKN-01 monotherapy in recurrent EOC (Group 3)
  4. 300mg DKN-01+paclitaxel in recurrent EOC (Group 4)
  5. 600mg DKN-01 monotherapy in recurrent carcinosarcoma (MMMT) (Group 5)
  6. 600mg DKN-01+paclitaxel in recurrent carcinosarcoma (MMMT) (Group 6)
02

Conditions studied

  • Endometrial Cancer
  • Uterine Cancer
  • Ovarian Cancer
  • Carcinosarcoma

Keywords

  • epithelial histology
  • Wnt pathway
  • DKK1
  • endometrial
  • uterine
  • ovarian
  • carcinosarcoma
03

In context

Endometrial Neoplasms

1,425 studies on the registry are indexed under Endometrial Neoplasms; 473 are open to participants now.

This study's enrollment of 111 is above the median of 71 across 1,026 interventional studies indexed under Endometrial Neoplasms.

Browse Endometrial Neoplasms studies →

Lead sponsor

Leap Therapeutics, Inc. is the lead sponsor of 11 studies on the registry; none are open to participants now.

Of its 5 completed or terminated interventional studies of FDA-regulated products, 2 (40%) 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

  1. Diagnosis:

    1. Epithelial Endometrial Cancer: confirmed diagnosis (by either primary surgical specimen or for recurrence) of recurrent previously treated EEC.
    2. Epithelial Ovarian Cancer: histologically confirmed diagnosis (by either primary surgical specimen or biopsy for recurrence) of recurrent platinum-resistant/ EOC, primary peritoneal, or fallopian tube cancer (i.e., disease recurrence within 6 months of completion of or progression during platinum-based chemotherapy).
    3. Carcinosarcoma/Malignant Mixed Mullerian Tumors: histologically confirmed diagnosis (by either primary surgical specimen or biopsy for recurrence) of recurrent uterine or ovarian carcinosarcoma (MMMT). Patients must have had only 1 prior chemotherapeutic regimen for management of carcinosarcoma that may have been included chemotherapy (including in setting), chemotherapy and radiotherapy, and/or consolidation/maintenance therapy.
  2. Refractory or intolerant to at least one prior standard therapy(ies) for or locally advanced disease (see Inclusion Criterion #1c for Groups 5-6).

    1. If prior therapy consisted of palliative chemoradiation therapy, it will be considered one .
    2. Prior treatment with paclitaxel as part of definitive therapy regimen is acceptable, provided the patient is not intolerant of paclitaxel.
    3. Patients who are not eligible to receive paclitaxel will be allowed to receive single agent DKN-01.
  3. Tumor tissue for mandatory pre-treatment and on-treatment biopsies.
  4. One or more tumors measurable on radiographic imaging as defined by 1.1.
  5. Ambulatory and ≥18 years of age.
  6. performance status (PS) of 0 or 1

    a. ECOG PS of 2 may be eligible upon the review and approval of the Medical Monitor.

  7. Estimated of at least 3 months, in the judgment of the Investigator.
  8. Disease-free of active second/secondary or prior for ≥2 years with the exception of currently treated basal cell, squamous cell carcinoma of the skin, or carcinoma in-situ of the cervix or breast.
  9. Acceptable liver, renal, hematologic and coagulation function
  10. Females of child bearing potential and male partners of female patients must agree to use adequate during the study and for 6 months after their last dose of study drug.
  11. Reliable and willing to make themselves available for the duration of the study and are willing to follow study-specific procedures.
  12. Provided written prior to any study-specific procedures.

Exclusion criteria

Exclusion Criteria:

  1. Patients with the following pure histologies of endometrial or ovarian cancer are not eligible for enrollment: germ cell, sex cord stroma, or sarcoma.
  2. Class III or IV cardiac disease, myocardial infarction within the past 6 months, or unstable arrhythmia.
  3. Fridericia- interval (QTcF) > 470 msec (female) or history of congenital long QT syndrome.
  4. Active, uncontrolled bacterial, viral, or fungal infections, within 7 days of study entry requiring systemic therapy.
  5. Known to be (HIV) positive, have surface antigen (HBSAg), or antibodies (HCAb), unless hepatitis C virus ribonucleic acid (HCV RNA) undetected/negative.
  6. History of major organ transplant (i.e., heart, lungs, liver, or kidney).
  7. History of autologous/allogenic bone marrow transplant.
  8. Serious nonmalignant disease
  9. Pregnant or nursing.
  10. History of osteonecrosis of the hip or have evidence of structural bone abnormalities in the proximal femur on MRI scan that are symptomatic and .
  11. Symptomatic central nervous system (CNS) or .
  12. Known osteoblastic bony metastasis
  13. Treatment with surgery or chemotherapy within 21 days prior to study entry (42 days for nitrosoureas or mitomycin C)
  14. Any hormonal therapy directed at the malignant tumor must be discontinued at least one week prior to study entry.
  15. Clinically significant peripheral neuropathy at the time of study entry. Patients with pre-existing peripheral neuropathy will be allowed to receive single agent DKN-01
  16. History of reactions to paclitaxel or other drugs formulated in Cremophor® EL (polyoxyethylated castor oil). Patients who exhibit these hypersensitivities will be eligible to receive single agent DKN-01
  17. Prior radiation therapy within 14 days prior to study entry
  18. Currently receiving any other agent or received an investigational agent within last 30 days of study entry.
  19. Previously treated with an anti-DKK1 therapy
  20. Significant allergy to a pharmaceutical therapy that, in the opinion of the Investigator, poses an increased risk to the patient
  21. Active substance abuse
Terms in these criteria, in plain language(20)

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.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

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.

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.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

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.

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.

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.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

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.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

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.

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.

QT and QTc

On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.

The study may name a correction formula and a limit in milliseconds, often around 450–480.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

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.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

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.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
111 participants (actual)

Study arms

  • Experimental
    DKN-01 monotherapy in recurrent EEC

    300mg DKN-01 monotherapy in recurrent EEC

    Drug: 300mg DKN-01

  • Experimental
    DKN-01+paclitaxel in recurrent EEC

    300mg DKN-01+paclitaxel in recurrent EEC

    Drug: Paclitaxel · Drug: 300mg DKN-01

  • Experimental
    DKN-01 monotherapy in recurrent EOC

    300mg DKN-01 monotherapy in recurrent EOC

    Drug: 300mg DKN-01

  • Experimental
    DKN-01+paclitaxel in recurrent EOC

    300mg DKN-01+paclitaxel in recurrent EOC

    Drug: Paclitaxel · Drug: 300mg DKN-01

  • Experimental
    DKN-01 monotherapy in carcinosarcoma

    600mg DKN-01 monotherapy in carcinosarcoma

    Drug: 600mg DKN-01

  • Experimental
    DKN-01 +paclitaxel in carcinosarcoma

    600mg DKN-01 +paclitaxel in carcinosarcoma

    Drug: Paclitaxel · Drug: 600mg DKN-01

Interventions

06

What researchers measure

Primary outcomes

  1. Number of Subjects With Objective Response Rate (ORR) in EEC or EOC Patients

    Best overall response of Complete Response (CR; disappearance of all target lesions, any pathological lymph nodes whether target or non-target must have reduction in short axis to \<10mm) or Partial Response (PR; at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum of diameters) as assessed by the Investigator per Response Evaluation Criteria in Solid Tumors Criteria (RECIST v1.1)

    Time frame: Baseline to study completion (approximately 6 months)

  2. Number of Subjects With Objective Response Rate (ORR) in Carcinosarcoma (MMMT) Patients

    Best overall response of Complete Response (CR; disappearance of all target lesions, any pathological lymph nodes whether target or non-target must have reduction in short axis to \<10mm) or Partial Response (PR; at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum of diameters) as assessed by the Investigator per Response Evaluation Criteria in Solid Tumors Criteria (RECIST v1.1)

    Time frame: Baseline to study completion (approximately 6 months)

Secondary outcomes

  1. Number of Subjects With Objective Disease Control Rate (ODCR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

    Objective Disease Control Rate (ODCR) was defined as the percentage of subjects with a Best Overall Response of Complete Response (CR; disappearance of all target lesions, any pathological lymph nodes whether target or non-target must have reduction in short axis to \<10mm), Partial Response (PR; at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum of diameters), or Stable Disease (neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify as Progressive Disease) as assessed by the Investigator per Response Evaluation Criteria in Solid Tumors Criteria (RECIST v1.1)

    Time frame: Baseline to study completion (approximately 6 months)

  2. Overall Survival (OS) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

    Overall Survival (OS) is defined as the time from first dose of study drug until date of death due to any cause.

    Time frame: Baseline to study completion (maximum 17.6 months)

  3. Progression-free Survival (PFS) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

    Progression-free survival (PFS) is defined as time from first dose of study drug to first documentation of PD (per RECIST 1.1) or death due to any cause.

    Time frame: Baseline to study completion (maximum 7.1 months)

  4. Duration of Response (DoR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

    Duration of Response (DoR) includes only patients that have responded with an objective disease response (PR or CR) and is defined as the time from the first tumor assessment that supports the patient's objective disease response to the time of PD or death due to any cause.

    Time frame: Baseline to study completion (approximately 11 months)

  5. Duration of Complete Response (DoCR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

    Number of participants analyzed only includes patients with a CR and is otherwise defined and analyzed similar to DoR.

    Time frame: Baseline to study completion (approximately 11 months)

  6. Duration of Clinical Benefit (DoCB) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

    Duration of Clinical Benefit (DoCB) includes patients with a Best Overall Response of CR, PR, or SD and is defined as the time from the first tumor assessment of CR, PR or SD to the time of PD or death due to any cause.

    Time frame: Baseline to study completion (approximately 13.1 months)

Other outcomes

  1. Number of Subjects With Response to Therapy in Patients With and Without Activating β-catenin Mutations and/or Wnt Signaling Genetic Alterations in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT)

    Time frame: Baseline to study completion (approximately 6 months)

  2. Dickkopf-1 (DKK1) Concentration in Serum and Plasma Relative to Safety and Efficacy Outcomes in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

    Time frame: Baseline to study completion (approximately 6 months)

  3. Number of Subjects With Adverse Drug Reactions and Toxicities as Evaluated by NCI CTCAE v5.0 of DKN-01 600 mg +/- Paclitaxel in Patients With Recurrent Carcinosarcoma (MMMT) in Carcinosarcoma (MMMT) Patients

    Time frame: Baseline to study completion (approximately 6 months)

  4. Number of Participants With Treatment-related Adverse Events as Assessed by CTCAE v4.0

    Time frame: Baseline to study completion (approximately 6 months)

  5. Maximum Plasma Concentration (Cmax)

    Time frame: Baseline to study completion (approximately 6 months)

  6. Time Taken to Reach the Maximum Plasma Concentration (Tmax)

    Time frame: Baseline to study completion (approximately 6 months)

  7. Area Under the Curve (AUC)

    Time frame: Baseline to study completion (approximately 6 months)

  8. Number of Subjects With Adverse Drug Reactions and Toxicities as Evaluated by NCI CTCAE v4.03 as DKN-01 as Monotherapy or in Combination With Paclitaxel in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT)

    Time frame: Baseline to study completion (approximately 6 months)

  9. Number of Subjects With Adverse Drug Reactions and Toxicities to Study Treatment Regimen in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT) as Evaluated by NCI CTCAE v5.0

    Time frame: Baseline to study completion (approximately 6 months)

  10. Concentration of DKN-01 Antibodies in Human Serum in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT)

    Time frame: Baseline to study completion (approximately 6 months)

07

Results

Posted Jun 9, 2023

Participant flow

Participant flow — Overall Study
MilestoneDKN-01 Monotherapy in Recurrent EECDKN-01+Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01+Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg + Paclitaxel in CarcinosarcomaDKN-01 600 mg + Paclitaxel in Carcinosarcoma
Started2924141918412
Completed2621131918410
Not completed33100002

Outcome measures

PrimaryNumber of Subjects With Objective Response Rate (ORR) in EEC or EOC Patients

Best overall response of Complete Response (CR; disappearance of all target lesions, any pathological lymph nodes whether target or non-target must have reduction in short axis to \<10mm) or Partial Response (PR; at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum of diameters) as assessed by the Investigator per Response Evaluation Criteria in Solid Tumors Criteria (RECIST v1.1)

Time frame:
Baseline to study completion (approximately 6 months)
Reported as:
Number · participants
Number of Subjects With Objective Response Rate (ORR) in EEC or EOC Patients
participantsDKN-01 Monotherapy in Recurrent EECDKN-01 + Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01 + Paclitaxel in Recurrent EOC
ORR2000
Complete Response1000
Partial Response1000
Stable Disease912613
Progressive Disease15976
PrimaryNumber of Subjects With Objective Response Rate (ORR) in Carcinosarcoma (MMMT) Patients

Best overall response of Complete Response (CR; disappearance of all target lesions, any pathological lymph nodes whether target or non-target must have reduction in short axis to \<10mm) or Partial Response (PR; at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum of diameters) as assessed by the Investigator per Response Evaluation Criteria in Solid Tumors Criteria (RECIST v1.1)

Time frame:
Baseline to study completion (approximately 6 months)
Reported as:
Number · participants
Number of Subjects With Objective Response Rate (ORR) in Carcinosarcoma (MMMT) Patients
participantsDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg + Paclitaxel in CarcinosarcomaDKN-01 600mg + Paclitaxel in Carcinosarcoma
Confirmed ORR0011
Complete Response0000
Partial Response0011
Stable Disease1104
Progressive Disease0735
SecondaryNumber of Subjects With Objective Disease Control Rate (ODCR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

Objective Disease Control Rate (ODCR) was defined as the percentage of subjects with a Best Overall Response of Complete Response (CR; disappearance of all target lesions, any pathological lymph nodes whether target or non-target must have reduction in short axis to \<10mm), Partial Response (PR; at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum of diameters), or Stable Disease (neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify as Progressive Disease) as assessed by the Investigator per Response Evaluation Criteria in Solid Tumors Criteria (RECIST v1.1)

Time frame:
Baseline to study completion (approximately 6 months)
Reported as:
Count of participants · Participants
Number of Subjects With Objective Disease Control Rate (ODCR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).
ParticipantsDKN-01 Monotherapy in Recurrent EECDKN-01 + Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01 + Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg + Paclitaxel in CarcinosarcomaDKN-01 600mg + Paclitaxel in Carcinosarcoma
Number of Subjects With Objective Disease Control Rate (ODCR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).11126131115
SecondaryOverall Survival (OS) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

Overall Survival (OS) is defined as the time from first dose of study drug until date of death due to any cause.

Time frame:
Baseline to study completion (maximum 17.6 months)
Reported as:
Median · months
Overall Survival (OS) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).
monthsDKN-01 Monotherapy in Recurrent EECDKN-01 + Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01 + Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg + Paclitaxel in CarcinosarcomaDKN-01 600mg + Paclitaxel in Carcinosarcoma
Overall Survival (OS) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).12.2 (4.6 to NA)10.1 (6.5 to 13.6)10.8 (5.7 to 17.6)11.9 (6.6 to NA)NA (NA to NA)8.4 (1.3 to NA)7.3 (5.3 to NA)5.7 (1.6 to NA)
SecondaryProgression-free Survival (PFS) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

Progression-free survival (PFS) is defined as time from first dose of study drug to first documentation of PD (per RECIST 1.1) or death due to any cause.

Time frame:
Baseline to study completion (maximum 7.1 months)
Reported as:
Median · months
Progression-free Survival (PFS) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).
monthsDKN-01 Monotherapy in Recurrent EECDKN-01 + Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01 + Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg + Paclitaxel in CarcinosarcomaDKN-01 600mg + Paclitaxel in Carcinosarcoma
Progression-free Survival (PFS) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).1.8 (1.7 to 5.5)3.8 (1.8 to 5.4)2.1 (1.6 to 3.5)3.6 (1.8 to 7.1)11.6 (NA to NA)1.6 (0.5 to 7.9)2.0 (1.8 to 5.5)1.9 (0.9 to 4.0)
SecondaryDuration of Response (DoR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

Duration of Response (DoR) includes only patients that have responded with an objective disease response (PR or CR) and is defined as the time from the first tumor assessment that supports the patient's objective disease response to the time of PD or death due to any cause.

Time frame:
Baseline to study completion (approximately 11 months)
Reported as:
Median · months
Duration of Response (DoR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).
monthsDKN-01 Monotherapy in Recurrent EECDKN-01 + Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01 + Paclitaxel in Eecurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg + Paclitaxel in CarcinosarcomaDKN-01 600mg + Paclitaxel in Carcinosarcoma
Duration of Response (DoR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).NA (NA to NA)—————3.7 (NA to NA)NA (NA to NA)
SecondaryDuration of Complete Response (DoCR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

Number of participants analyzed only includes patients with a CR and is otherwise defined and analyzed similar to DoR.

Time frame:
Baseline to study completion (approximately 11 months)
Reported as:
Median · months
Duration of Complete Response (DoCR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).
monthsDKN-01 Monotherapy in Recurrent EECDKN-01 + Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01 + Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg + Paclitaxel in CarcinosarcomaDKN-01 600mg + Paclitaxel in Carcinosarcoma
Duration of Complete Response (DoCR) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).NA (NA to NA)———————
SecondaryDuration of Clinical Benefit (DoCB) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).

Duration of Clinical Benefit (DoCB) includes patients with a Best Overall Response of CR, PR, or SD and is defined as the time from the first tumor assessment of CR, PR or SD to the time of PD or death due to any cause.

Time frame:
Baseline to study completion (approximately 13.1 months)
Reported as:
Median · months
Duration of Clinical Benefit (DoCB) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).
monthsDKN-01 Monotherapy in Recurrent EECDKN-01 + Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01 + Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg + Paclitaxel in CarcinsarcomaDKN-01 600mg + Paclitaxel in Carcinosarcoma
Duration of Clinical Benefit (DoCB) in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).4.7 (1.2 to 9.2)3.8 (2.0 to 4.2)1.9 (1.7 to 13.1)3.9 (1.8 to 5.6)NA (NA to NA)6.0 (NA to NA)3.7 (NA to NA)2.2 (1.9 to NA)
Other pre-specifiedNumber of Subjects With Response to Therapy in Patients With and Without Activating β-catenin Mutations and/or Wnt Signaling Genetic Alterations in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT)
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Other pre-specifiedDickkopf-1 (DKK1) Concentration in Serum and Plasma Relative to Safety and Efficacy Outcomes in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT).
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Other pre-specifiedNumber of Subjects With Adverse Drug Reactions and Toxicities as Evaluated by NCI CTCAE v5.0 of DKN-01 600 mg +/- Paclitaxel in Patients With Recurrent Carcinosarcoma (MMMT) in Carcinosarcoma (MMMT) Patients
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Other pre-specifiedNumber of Participants With Treatment-related Adverse Events as Assessed by CTCAE v4.0
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Other pre-specifiedMaximum Plasma Concentration (Cmax)
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Other pre-specifiedTime Taken to Reach the Maximum Plasma Concentration (Tmax)
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Other pre-specifiedArea Under the Curve (AUC)
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Other pre-specifiedNumber of Subjects With Adverse Drug Reactions and Toxicities as Evaluated by NCI CTCAE v4.03 as DKN-01 as Monotherapy or in Combination With Paclitaxel in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT)
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Other pre-specifiedNumber of Subjects With Adverse Drug Reactions and Toxicities to Study Treatment Regimen in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT) as Evaluated by NCI CTCAE v5.0
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Other pre-specifiedConcentration of DKN-01 Antibodies in Human Serum in Patients With Recurrent EEC or EOC or Carcinosarcoma (MMMT)
Time frame:
Baseline to study completion (approximately 6 months)

Results for this outcome have not been posted.

Adverse events

Collected over The Safety Analysis Set is all subjects who received greater than or equal to 1 administration of assigned study treatment (DKN-01 or paclitaxel). Subjects were followed for treatment emergent adverse events (AE), defined as any AE with an onset or worsening of a pre-existing condition on or after the first dose of the study drug through 30 days following the last dose of study drug, up to approximately 2 years.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
DKN-01 Monotherapy in Recurrent EEC14/29 (48.3%)8/29 (27.6%)29/29 (100%)
DKN-01+Paclitaxel in Recurrent EEC16/24 (66.7%)13/24 (54.2%)24/24 (100%)
DKN-01 Monotherapy in Recurrent EOC11/14 (78.6%)1/14 (7.1%)13/14 (92.9%)
DKN-01+Paclitaxel in Recurrent EOC12/19 (63.2%)6/19 (31.6%)19/19 (100%)
300mg DKN-01 Monotherapy in Carcinosarcoma0/1 (0%)1/1 (100%)1/1 (100%)
600mg DKN-01 Monotherapy in Carcinosarcoma4/8 (50%)2/8 (25%)8/8 (100%)
300mg DKN-01+Paclitaxel in Carcinosarcoma2/4 (50%)0/4 (0%)4/4 (100%)
600mg DKN-01+Paclitaxel in Carcinosarcoma8/12 (66.7%)6/12 (50%)12/12 (100%)
Most frequent serious events
Showing 10 of 41
Most frequent serious events
EventDKN-01 Monotherapy in Recurrent EECDKN-01+Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01+Paclitaxel in Recurrent EOC300mg DKN-01 Monotherapy in Carcinosarcoma600mg DKN-01 Monotherapy in Carcinosarcoma300mg DKN-01+Paclitaxel in Carcinosarcoma600mg DKN-01+Paclitaxel in Carcinosarcoma
Pulmonary embolismRespiratory, thoracic and mediastinal disorders0/291/240/140/191/10/80/41/12
Atrial fibrillationCardiac disorders0/290/240/140/190/11/80/40/12
AscitesGastrointestinal disorders0/291/240/140/190/11/80/41/12
Oedema peripheralGeneral disorders0/290/240/140/190/11/80/40/12
Urinary tract obstructionRenal and urinary disorders0/290/240/140/190/11/80/40/12
DyspnoeaRespiratory, thoracic and mediastinal disorders0/291/240/140/190/11/80/40/12
Small intestinal obstructionGastrointestinal disorders0/292/240/140/190/10/80/41/12
Urinary tract infectionInfections and infestations1/290/240/140/190/10/80/41/12
Catheter site cellulitisInfections and infestations0/290/240/140/190/10/80/41/12
Upper respiratory tract infectionInfections and infestations0/290/240/140/190/10/80/41/12
Most frequent other events
Showing 10 of 285
Most frequent other events
EventDKN-01 Monotherapy in Recurrent EECDKN-01+Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01+Paclitaxel in Recurrent EOC300mg DKN-01 Monotherapy in Carcinosarcoma600mg DKN-01 Monotherapy in Carcinosarcoma300mg DKN-01+Paclitaxel in Carcinosarcoma600mg DKN-01+Paclitaxel in Carcinosarcoma
ChillsGeneral disorders2/293/240/142/191/11/81/40/12
PyrexiaGeneral disorders2/292/240/143/191/10/80/40/12
BronchitisInfections and infestations1/290/240/140/191/10/80/40/12
Procedural painInjury, poisoning and procedural complications2/292/240/140/191/10/81/41/12
ArthralgiaMusculoskeletal and connective tissue disorders6/294/242/143/191/11/80/41/12
Back painMusculoskeletal and connective tissue disorders3/297/242/140/191/12/80/42/12
PollakiuriaRenal and urinary disorders3/291/240/140/191/10/80/41/12
Pulmonary embolismRespiratory, thoracic and mediastinal disorders0/291/240/140/191/11/80/41/12
AlopeciaSkin and subcutaneous tissue disorders0/298/240/148/191/10/81/40/12
Deep vein thrombosisVascular disorders0/293/240/140/191/10/80/41/12

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)DKN-01 Monotherapy in Recurrent EECDKN-01+Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01+Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg+Paclitaxel in CarcinosarcomaDKN-01 600mg+Paclitaxel in CarcinosarcomaTotal
<=18 years000000000
Between 18 and 65 years1912510122859
>=65 years101299062452
Sex: Female, Male
Sex: Female, Male(Participants)DKN-01 Monotherapy in Recurrent EECDKN-01+Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01+Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg+Paclitaxel in CarcinosarcomaDKN-01 600mg+Paclitaxel in CarcinosarcomaTotal
Female2924141918412111
Male000000000
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)DKN-01 Monotherapy in Recurrent EECDKN-01+Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01+Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg+Paclitaxel in CarcinosarcomaDKN-01 600mg+Paclitaxel in CarcinosarcomaTotal
Hispanic or Latino400101017
Not Hispanic or Latino2523141817410102
Unknown or Not Reported010000012
Race (NIH/OMB)
Race (NIH/OMB)(Participants)DKN-01 Monotherapy in Recurrent EECDKN-01+Paclitaxel in Recurrent EECDKN-01 Monotherapy in Recurrent EOCDKN-01+Paclitaxel in Recurrent EOCDKN-01 300mg Monotherapy in CarcinosarcomaDKN-01 600mg Monotherapy in CarcinosarcomaDKN-01 300mg+Paclitaxel in CarcinosarcomaDKN-01 600mg+Paclitaxel in CarcinosarcomaTotal
American Indian or Alaska Native000000000
Asian010000012
Native Hawaiian or Other Pacific Islander100000001
Black or African American022301008
White27211216174997
More than one race000000000
Unknown or Not Reported100000023
08

Study locations

17 sites
  • University of Alabama
    Birmingham, Alabama 35294, United States
  • HonorHealth
    Scottsdale, Arizona 85258, United States
  • Florida Cancer Specialists & Research Institute
    West Palm Beach, Florida 33401, United States
  • University of Chicago
    Chicago, Illinois 60637, United States
  • Massachusetts General Hospital
    Boston, Massachusetts 02114, United States
  • Dana Farber Cancer Institute
    Boston, Massachusetts 02215, United States
  • HCA Midwest Health System Clinical Research
    Kansas City, Missouri 64132, United States
  • Cleveland Clinic
    Cleveland, Ohio 44195, United States
  • Ohio State University Wexner Medical Center
    Hilliard, Ohio 43026, United States
  • Stephenson Cancer Center - University of Oklahoma Health Sciences Center
    Oklahoma City, Oklahoma 73104, United States
  • The University of Tennessee West Cancer Center
    Germantown, Tennessee 38138, United States
  • Tennessee Oncology, PLLC
    Nashville, Tennessee 37203, United States
  • Vanderbilt University Medical Center
    Nashville, Tennessee 37232, United States
  • University of Texas Southwestern Medical Center
    Dallas, Texas 75390, United States
  • University of Virginia Cancer Center
    Charlottesville, Virginia 22903, United States
  • University of Wisconsin
    Madison, Wisconsin 53715, United States
  • Froedtert and Medical College of Wisconsin
    Milwaukee, Wisconsin 53226, United States
09

References and documents

Publications

  • Arend R, Dholakia J, Castro C, Matulonis U, Hamilton E, Jackson CG, LyBarger K, Goodman HM, Duska LR, Mahdi H, ElNaggar AC, Kagey MH, Liu A, Piper D, Barroilhet LM, Bradley W, Sachdev J, Sirard CA, O'Malley DM, Birrer M. DKK1 is a predictive biomarker for response to DKN-01: Results of a phase 2 basket study in women with recurrent endometrial carcinoma. Gynecol Oncol. 2023 May;172:82-91. doi: 10.1016/j.ygyno.2023.03.013. Epub 2023 Mar 29. PubMed 37001446 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Mar 2018 to primary completion in Sep 2020, 30 months.

Results were first posted in Jun 2023, 2 years 9 months after primary completion.

Of 139 phase 2 interventional studies under Endometrial Neoplasms, half reached primary completion within 55 months of starting (the median), counting those still running; a quarter within 37 and three quarters within 115. This study's 30 months is below that.

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

Registered
Jan 2, 2018
First posted
Jan 10, 2018
StartActual
Mar 5, 2018
Primary completionActual
Sep 9, 2020
CompletionActual
Jan 27, 2021
Results first posted
Jun 9, 2023
Last update
Aug 1, 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 Aug 1, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03395080
Lead sponsor
Leap Therapeutics, Inc.
Responsible party
Sponsor
First posted
Jan 10, 2018
Start date
Mar 5, 2018
Primary completion
Sep 9, 2020
Completion
Jan 27, 2021
Results posted
Jun 9, 2023
Last update
Aug 1, 2025

Study contacts

Cynthia Sirard
study director · Leap Therapeutics

Oversight

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

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Studies of the drugs tested here: Paclitaxel · Sirexatamab

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