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Enzalutamide and PDS01ADC in PET Positive Recurrent Prostate Cancer (pprPC) Without Testosterone Lowering Therapy

  • PhasePhase 2
  • StatusRecruiting
  • Planned enrollment65 people
  • Recruiting US sites1
  • SponsorNational Cancer Institute (NCI)
  • RegistryNCT06096870

Recruitment re-checked on ClinicalTrials.gov Oct 30, 2026. Public record; not medical advice.

Enzalutamide and PDS01ADC in PET Positive Recurrent Prostate Cancer (pprPC) Without Testosterone Lowering Therapy: a one-minute explainerNCT060968701 min

Eligibility

Who can join

The film gives the main points. The full list below is copied from the registry; the study team makes the final decision.

  • Age18 Years to 120 Years
  • SexMale
  • Healthy volunteersNo

You may be able to join if

  • INCLUSION CRITERIA:
  • Participant must provide documentation of histologic or cytological confirmation of prostate cancer or tumor sample for diagnosis confirmation. Note: in the absence of pathology or documentation, participant must have a rising PSA, PSMA+ disease, and his history consistent with prostate cancer as documented by the investigator.
  • History of primary treatment for prostate cancer (either surgery or radiation).
  • Prostate-specific antigen (PSA) doubling time within less than 12 months.
  • Testosterone >100 ng/dL.
  • Age >=18 years.
  • Evidence of prostate cancer on PSMA PET/CT scan.
  • Eastern Cooperative Oncology Group (ECOG) performance status <2.
  • Men must agree to use an effective method of contraception (barrier or surgical sterilization) after study entry and for 3 months after completion of enzalutamide or PDS01ADC therapy whatever comes later.
  • Participants must have adequate organ and marrow function as defined below:
  • Absolute neutrophil count (ANC) >=1,500/microliter, without granulocyte colony-stimulating factor (G-CSF) support
  • Platelets >=100,000/microliter
  • Aspartate aminotransferase (AST) /Alanine aminotransferase (ALT) <=2.5 x institutional upper limit of normal (ULN)
  • Hemoglobin (Hgb) >= 10 g/dL (packed red blood cell (pRBC) transfusions are not allowed to achieve acceptable Hgb)
  • Total bilirubin <= 1.5 x ULN, OR <= 3.0 ULN in participants with Gilbert s syndrome
  • Serum albumin >= 2.8 g/dL
  • Creatinine < 1.5 X institution ULN
  • OR
  • -Measured or calculated creatinine clearance (CrCl) (estimated glomerular filtration rate (eGFR) may also be used in place of CrCl) > 45 mL/min/1.73 m^2 for participant with creatinine levels > 1.5 x institutional ULN
  • Hepatitis B virus (HBV)-infected participants can be enrolled if HBV DNA is undetectable at screening. Hepatitis C virus (HCV)-infected participants can be enrolled if the HCV RNA level is undetectable at screening. Human immunodeficiency virus (HIV)-positive participants can be enrolled if HIV DNA is undetectable.
  • Participants must be able to swallow tablets/capsules.
  • Participants must be able to understand and willing to sign a written informed consent document.

You cannot join if

  • Evidence of soft tissue disease on CT scan (or magnetic resonance imaging (MRI) if assessment cannot be done by CT scan) per RECIST 1.1 criteria (lymph nodes up to 2.0 cm in the shortest dimension are allowed).
  • Evidence of bone lesions on Tc99 bone scan.
  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to study drugs or imaging agents used in the study.
  • Any medical condition that requires chronic systemic steroid therapy, or any other form of immunosuppressive medication (inhaled and topical steroids are permitted).
  • History of seizures within the last 10 years.
  • Therapy with strong inhibitors or inducers of CYP2C8 or CYP3A4 within 5 half-lives prior to the study treatment initiation. Standard clinical resources (e.g., Lexidrug) should be consulted to determine the classification of CYP inhibitors and inducers.
  • Participants with prior malignancy active within 3 years prior to study treatment initiation except for locally curable cancers that have been apparently cured such as basal or squamous cell skin cancer, superficial bladder cancer, or carcinoma in situ of the breast.
  • Uncontrolled intercurrent illness that would limit compliance with study requirements.

The treatment

How it is intended to work

This is how the treatment is meant to work. Whether it helps, and how safe it is, is what this trial is testing.

deuterated enzalutamide. A deuterated form of enzalutamide, an orally bioavailable, organic, non-steroidal small molecule targeting the androgen receptor (AR) with potential antineoplastic activity. Upon administration, deuterated enzalutamide competitively binds to and inhibits the activity of ARs expressed on prostate cancer cells, which impairs nuclear translocation and DNA binding, resulting in apoptosis of prostate cancer cells. This results in a reduction in prostate cancer cell growth. AR overexpression in prostate cancer represents a key mechanism associated with prostate cancer hormone resistance. Deuterium incorporation, by replacing the hydrogen atoms of the N-CH3 moiety with deuterium atoms, decreases enzalutamide's metabolism and allows for an increased pharmacokinetic profile, thereby enhancing its anti-tumor efficacy compared to non-deuterated enzalutamide. As the deuterated form can’t cross the blood-brain barrier (BBB), the deuterated form also reduces the unwanted brain-related side effects of enzalutamide and improves its safety profile. NCI Drug Dictionary

Treatments listed in the registry

  • Enzalutamide (Drug): Enzalutamide at 160 mg once daily on every day of the cycle (every 28 days)
  • PDS01ADC (Drug): PDS01ADC at 12.0 microgram/kg by subcutaneous injection (every 28 days)

The study

Treatment groups

Randomized · Parallel · masking: None

Arm 1 (Experimental)

Enzalutamide

Arm 2 (Experimental)

Enzalutamide+PDS01ADC

What it involves

Procedures

As the registry describes them. Requirements to join, such as a tissue sample, are in the eligibility list above even when on-study procedures are optional. Ask the study team which steps apply to you.

  • CT scans: Part of the study plan
  • MRI: Part of the study plan
  • PET scans: Part of the study plan
  • surgery: Part of the study plan
  • bone scan: Part of the study plan

Goals

What the study measures

Main goals

  • Determine if the combination of enzalutamide and PDS01ADC is associated with an increase in the duration of PSA suppression compared to that of enzalutamide alone (5 years)

Other goals

  • PET changes after enzalutamide with and without PDS01ADC treatment
  • Safety of study treatment
  • Evaluate immune response
  • PSA detection

Planned enrollment: 65 (estimated).

Where

Recruiting US sites

  • National Institutes of Health Clinical Center, Bethesda, Maryland

Site status as of Oct 30, 2026. Check the live record before contacting a site.

Sources

Where this comes from

Registry record reviewed as fetched Oct 30, 2026, last updated by the sponsor Oct 15, 2026. Public record; not medical advice.

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