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New PET tracer aims to spot hidden cancers with precision

NCT ID NCT07172503

Diagnosis Sponsor: Union Hospital, Tongji Medical College, Huazhong University of Science and Technology Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 26, 2026 · Updated 1 time

Summary

This study tests a new radioactive imaging agent called 68Ga-NOTA-GPA33 nanobody, which targets a protein (GPA33) found on some cancer cells. Researchers will use PET scans to see if this agent can better detect and stage colorectal, stomach, and pancreatic cancers in 56 patients and healthy volunteers. The goal is to improve diagnosis and staging compared to standard methods.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
68Ga-NOTA-GPA33 nanobody (a radioactive imaging agent)
What this could lead to
If successful, this could provide a more accurate way to detect and stage certain cancers using PET scans, potentially improving treatment decisions.
What could go wrong
This is an early diagnostic study with only 56 participants, so results may not apply to all patients. The imaging agent's accuracy and safety are still being evaluated.

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

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 56 people

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

Expected to start

Oct 2025

An estimate. Start dates often move.

Expected to finish

Dec 2026

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

18 to 70 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: Each subject must meet all enrollment criteria to be eligible to participate in the study: * 1: The subject or his/her legal representative is able to sign and date the informed consent form; * 2: A commitment to comply with the research procedures and to cooperate in the implementation of the full research process; * 3: Adult patients or healthy volunteers (aged 18 or above) of either sex; * 4: Patients with clinically suspected or confirmed malignant tumors such as colorectal cancer, gastric cancer, pancreatic cancer (supporting evidence includes serum-related tumor markers, imaging data such as ultrasound, CT, MRI, etc., and histological pathology examination, etc.) and in good general condition; * 5: Consistent with the results of specific laboratory tests; * 6: Females of childbearing potential who have been using contraception for at least one month prior to screening and who are committed to using contraception for the entire study period and until a specified time after the end of the study； * 7: Other set entry criteria. Exclusion Criteria: All subjects who meet any of the exclusion criteria baseline will be excluded from the study: * 1: Those who are unable to complete a PET/MR or PET/CT examination (including inability to lie down, claustrophobia, radiophobia, etc.); * 2: Having other comorbidities; * 3: Patients with known hypersensitivity to GPA33 nanobody developers or synthetic excipients; fasting blood glucose level greater than 11.0 mmol/L prior to 18F-FDG injection； * 4: Have a history of comorbid drug use; * 5: Patients considered by the investigator to have poor compliance; * 6: Patients during pregnancy or lactation; * 7: Persons with other factors that make participation in this test inappropriate.

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Conditions

The condition(s) this trial relates to.

colorectal cancer colorectal neoplasm gastric cancer gastric neoplasm malignant pancreatic neoplasm pancreatic neoplasm

As listed by the trial registrant

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

Colorectal cancer Gastric cancer (GC) Pancreatic cancer

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

  • Union Hospital, Tongji Medical College, Huazhong University of Science and Technology

    Wuhan, Hubei, 430030, China

More trials for these conditions

Other studies related to the condition(s) this trial covers.