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Biopsies reveal secrets of therapy resistance in advanced prostate cancer

NCT ID NCT05398302

Knowledge-focused Sponsor: Jonsson Comprehensive Cancer Center Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at why some prostate cancers become resistant to a targeted radiation treatment called 177Lu-PSMA. Researchers will take small tissue samples (biopsies) from tumors in 30 patients before and after therapy. The goal is to find genetic changes that cause resistance, which could help doctors plan better treatments in the future.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 30 people

The number the study aims to enrol. It can still change while the study runs.

Started

Apr 2024

Expected to finish

Dec 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Male participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Volunteer patient * Histologically confirmed prostate cancer * Eligible for 177Lu-PSMA-617 under expanded access protocol (IRB# 21-5010) or as part of an approved trial * Based on positron emission tomography (PET)/computed tomography (CT) images: Evidence of lymph node or soft tissue metastatic disease amenable to image-guided biopsy * Platelets \> 75,000/ul within 14 days prior to biopsy * Prothrombin time (PT) or International normalized ratio (INR) and a partial thromboplastin time (PTT) \< 1.5 times the institutional upper limit normal (ULN) within 14 days prior to biopsy * Patients on warfarin, aspirin, or other anti-coagulants are eligible provided they are deemed able to tolerate discontinuation of anti-coagulation for one week prior to the biopsy. Conversion to low molecular weight heparin prior to biopsy is permitted per local standard operating procedures, provided there is agreement regarding the procedure between the treating physician, the interventional radiologist and the principal investigator (PI) Exclusion Criteria: * Patients with significant congenital or acquired bleeding disorders (e.g. von Wildebrand's disease, acquired bleeding factor inhibitors) are not eligible

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Conditions

The condition(s) this trial relates to.

castration-resistant prostate carcinoma metastatic prostate carcinoma prostate cancer

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Castration-resistant prostate carcinoma Metastatic prostate carcinoma Stage IV prostate cancer american joint committee on cancer (AJCC) V8 Stage IVA prostate cancer ajcc V8 Stage IVB prostate cancer ajcc V8

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • UCLA / Jonsson Comprehensive Cancer Center

    RECRUITING

    Los Angeles, California, 90095, United States

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