Immune Biomarkers in Prostate Cancer Patients Treated With Brachytherapy

November 17, 2025 updated by: Claudia Schweizer, University of Erlangen-Nürnberg Medical School

Immune Biomarkers in Prostate Cancer Patients Treated With Brachytherapy (ImmunBioProBrachy)

Analysis of peripheral immune cells before, during, and after brachytherapy treatment. Corresponding analysis of tissue samples collected during brachytherapy treatment.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
200

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

  • Name: Anna-Jasmina Donaubauer, Dr. rer. nat.

Study Locations

  • Germany
    • Bavaria
      • Augsburg, Bavaria, Germany, 86156
        • Not yet recruiting
        • Klinik für Strahlentherapie
        • Contact:
      • Erlangen, Bavaria, Germany, 91054
      • Munich, Bavaria, Germany, 81377
        • Not yet recruiting
        • Klinik und Poliklinik für Strahlentherapie und Radioonkologie
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Probability Sample

Study Population

Prostate cancer patients planning to undergo sole brachytherapy treatment

Description

Inclusion Criteria Arm 1:

  • Primary treatment with I-125 seeds or HDR-BT
  • No previous treatment for prostate cancer
  • Age ≥ 18 years

Inclusion Criteria Arm 2:

  • HDR- or PDR-BT
  • No radiation therapy within three months before salvage treatment
  • Complete documentation available on previous treatment for prostate cancer
  • No history of prostatectomy
  • Age ≥ 18 years

Exclusion Criteria:

  • Pre-existent auto-immune disease
  • patients under bloodthinning medication
  • substance abuse

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Primary brachytherapy
Patients receiving sole primary brachytherapy (either LDR-BT or HDR-BT) for low or low intermediate risk prostate cancer
Salvage brachytherapy
Patients receiving sole brachytherapy (either PDR-BT or HDR-BT) for locally recurrent prostate cancer after prior irradiation with prostate in situ

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Longitudinal changes of peripheral immune cells and cell-free DNA and tumor-associated tissue in patients with prostate cancer treated with brachytherapy
Time Frame: Blood withdrawal pre-brachytherapy treatment, during surgery, one day after brachytherapy and at the first follow-up visit 4-12 weeks later. Tissue samples at every brachytherapy procedure.
Longitudinal changes of peripheral immune cells and cell-free DNA and tumor-associated tissue in patients with prostate cancer treated with brachytherapy in the primary as well as in the recurrent setting.
Blood withdrawal pre-brachytherapy treatment, during surgery, one day after brachytherapy and at the first follow-up visit 4-12 weeks later. Tissue samples at every brachytherapy procedure.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Treatment-related toxicity
Time Frame: Up to 6 months
Acute toxicity related to brachytherapy
Up to 6 months
recurrence-free survival
Time Frame: Up to 6 months
recurrence-free survival
Up to 6 months
Overall survival
Time Frame: Up to 6 months
Overall survival
Up to 6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Erlangen-Nürnberg Medical School

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Ludwig-Maximilians - University of Munich
University Hospital Augsburg
Bavarian Cancer Research Center (BZKF)

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Claudia Schweizer, MD, Strahlenklinik Universitätsklinikum Erlangen
  • Principal Investigator: Anna-Jasmina Donaubauer, Dr. rer. nat., Strahlenklinik Universitätsklinikum Erlangen

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
December 1, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
July 31, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
July 31, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 3, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 17, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 20, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 18, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 17, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ImmunBioProBrachy

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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