CI

At a glance

ClinicalIndex Comparison Record
Phase 2Completed· 7 enrolled / 7 target
Drug / intervention
Enzalutamide +7 moredrug
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT05730712
NCT05730712Phase 2CompletedUpdate Overdue (0.3/mo)Completion was 14mo ago

Phase II Trial of Pertuzumab, Trastuzumab, and Hyaluronidase-zzxf (HP) Plus Enzalutamide for the Treatment of Selected Patients With Metastatic Castration-Resistant Prostate Cancer (TraPPer)

Mayo Clinic·interventional·Posted Feb 16, 2023·Updated Jun 9, 2026

In Brief

A Phase 2 clinical trial evaluating Biopsy, Biospecimen Collection, and 6 other interventions for Castration-Resistant Prostate Carcinoma and Stage IVB Prostate Cancer AJCC v8. Completed, enrolled 7 participants across 3 sites.

Signals

Enrollment appears stalled

Detailed Summary

This phase II trial tests how well pertuzumab, trastuzumab, hyaluronidase-zzxf and enzalutamide works in treating patients with castration-resistant prostate cancer that has spread from where it first started to other places in the body (metastatic). Pertuzumab and trastuzumab are monoclonal antibodies and forms of targeted therapy that attach to a receptor protein called human epidermal growth factor receptor-2 (HER2). HER2 is found on some cancer cells. When pertuzumab or trastuzumab attach to HER2, the signals that tell the cells to grow are blocked and the tumor cell may be marked for destruction by the body's immune system. Hyaluronidase is an endoglycosidase. It helps to keep pertuzumab and trastuzumab in the body longer, so that these medications will have a greater effect. Hyaluronidase also allows pertuzumab and trastuzumab to be given by injection under the skin and shortens their administration time compared to pertuzumab or trastuzumab alone. Chemotherapy drugs, such as enzalutamide, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving pertuzumab, trastuzumab, hyaluronidase-zzxf and enzalutamide may kill more cancer cells.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesUnited States
Collaborators--

Timeline

Phase 2CompletedFinished
202420252026
First PostedFeb 16, 2023
Enrollment StartMar 8, 2024
Primary CompletionApr 10, 2025
TodayJul 2, 2026
Enrollment to primary: 1.1 yearsPosted 3.4 years ago

Arms & Interventions

Treatment (HP, enzalutamide)experimental

Patients receive pertuzumab, trastuzumab, and hyaluronidase-zzxf SC on day 1 of each cycle and enzalutamide PO QD on days 1-21 of each cycle. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity. Patients undergo ECHO, biopsy, CT, and MRI scans and collection of blood samples throughout the study.

Procedure: BiopsyProcedure: Biospecimen CollectionProcedure: Computed TomographyProcedure: EchocardiographyDrug: EnzalutamideDrug: Hyaluronidase-zzxf/Pertuzumab/TrastuzumabProcedure: Magnetic Resonance ImagingOther: Questionnaire Administration

Interventions

Biopsyprocedure

Undergo biopsy

Biospecimen Collectionprocedure

Undergo collection of blood and tissue samples

Computed Tomographyprocedure

Undergo CT

Echocardiographyprocedure

Undergo ECHO

Enzalutamidedrug

Given PO

Hyaluronidase-zzxf/Pertuzumab/Trastuzumabdrug

Given SC

Magnetic Resonance Imagingprocedure

Undergo MRI

Questionnaire Administrationother

Ancillary studies