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New hope for rare blood cancers: first human trial of PRT12396 begins

NCT ID NCT07469891

Disease control Sponsor: Prelude Therapeutics Incorporated 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 18, 2026 · Updated 4 times

Summary

This early-stage study tests a new drug, PRT12396, in about 100 people with polycythemia vera or myelofibrosis—rare blood cancers. The main goals are to find a safe dose and check for side effects. Researchers will also look for signs that the drug controls the disease, but this is not a cure and long-term management is expected.

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 100 people

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

Started

Apr 2026

Expected to finish

Apr 2028

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Ages

18 years and older

Sex

Anyone

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: * Willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations (including contraception requirements), and other study procedures. * Confirmed diagnosis of PV or MF according to WHO 2016 or revised ICC/WHO 2022 criteria * Documented presence of a JAK2 V617 mutation * Eastern Cooperative Oncology Group (ECOG) performance status of 0-1 * Estimate life expectancy of ≥12 weeks per investigator assessment. * Negative serum or urine pregnancy test and agree to use contraception or maintain true abstinence. * Adequate organ function and bone marrow reserves (hematology, renal, and hepatic) Exclusion Criteria: * History of another malignancy within 3 years prior to enrollment, except for malignancy considered cured with low risk of recurrence. * Clinically significant anemia due to nutritional deficiency or hemolytic disorders. * Active or uncontrolled infection requiring systemic therapy or hospitalization. * Any other medical or psychiatric conditions that, in the Investigator's judgment, would increase risk or interfere with study participation or interpretation of results. * Clinically significant or uncontrolled medical conditions, including active infection or cardiovascular disease, that would increase risk or interfere with study participation. * Unresolved toxicity Grade \>1 from prior anticancer therapy, except for alopecia or peripheral neuropathy Grade ≤2. * Pregnancy or breastfeeding * Known sensitivity or contraindication to any component of study, or the excipients of study treatment. * Prior systemic therapy for PV or MF, prior or planned allogeneic hematopoietic stem-cell transplantation, recent major surgery, prior splenectomy or prior splenic irradiation, or use of hematopoietic growth factors within protocol-defined washout periods. * Use of strong or moderate cytochrome P450 (CYP) 3A4 inhibitor or inducer, sensitive CYP3A substrates with narrow therapeutic range, or acid-reducing agents that cannot be discontinued prior to study treatment. * Participation in another interventional clinical study.

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Conditions

The condition(s) this trial relates to.

acquired polycythemia vera myelofibrosis Myeloproliferative Disorders myeloproliferative neoplasm primary myelofibrosis

As listed by the trial registrant

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

Myelofibrosis (MF) Myeloproliferative neoplasms (MPNS) Polycythemia vera (PV) Post-essential thrombocythemia myelofibrosis Post-polycythemia vera myelofibrosis Primary myelofibrosis (PMF)

How to take part

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

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

    9 sites in 2 countries. The list below names each one and where it is.

  3. 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 ↗

  4. 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

Study contacts

  • Contact

    Email: •••••@•••••

Locations

  • BRCR Global - Coral Springs

    RECRUITING

    Coral Springs, Florida, 33065, United States

  • Colorado Blood Cancer Institute

    RECRUITING

    Denver, Colorado, 80218, United States

  • Hospital Clinic de Barcelona

    RECRUITING

    Barcelona, 08036, Spain

  • Moffitt Cancer Center

    RECRUITING

    Tampa, Florida, 33612, United States

  • START Midwest, LLC

    RECRUITING

    Grand Rapids, Michigan, 49546, United States

  • Tennessee Oncology, PLLC - Investigational Drug Services

    RECRUITING

    Nashville, Tennessee, 37203, United States

  • The University of Texas, MD Anderson Cancer Center

    RECRUITING

    Houston, Texas, 77030, United States

  • Thomas Jefferson University, Sidney Kimmel Cancer Center, Clinical Trials Office

    RECRUITING

    Philadelphia, Pennsylvania, 19107, United States

  • Tristar BMT

    RECRUITING

    Nashville, Tennessee, 37203, United States

More trials for these conditions

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