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Lymphoblastic LymphomaPhase 1ALT-101NCT07586618

First-in-human Study of a New Treatment (4A10) for Patients With Relapsed or Hard-to-treat Acute Lymphoblastic Leukemia or Lymphoblastic Lymphoma, Focused on Safety and How the Drug Behaves in the Body and Early Signs of Effect.

A Phase 1 study testing 4A10 in people with Lymphoblastic Lymphoma and Acute Lymphoblastic Leukemia ALL, run by Allterum Therapeutics, Inc at 7 sites in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

ALT-101 is a first-in-human Phase 1 clinical trial testing a new antibody drug called 4A10 in patients with relapsed or hard-to-treat acute lymphoblastic leukemia (ALL) or lymphoblastic lymphoma. 4A10 is a targeted therapy designed to recognize and attach to a specific protein (CD127) found on leukemia cells. Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
4A10
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
24 participants
Where
7 sitesUnited States
Study dates
1 Jun 2026to Sep 2028
Phase
Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Confirmed diagnosis of T/B-ALL or T/B-LL
  • Relapsed or refractory disease without curative options
  • Adequate organ function and performance status

Who cannot join

  • Patients with CNS3 disease
  • Patients with DNA fragility syndromes (e.g., Fanconi, Bloom), trisomy 21 (Down Syndrome)
  • Prior exposure to anti-CD127 therapies
  • Uncontrolled infections

Trial locations and contacts

7 sites in 1 country. Contact the study team or a site near you to ask about taking part.

Shibani M Kudchadkar, MD contact

15153439875

skudchadkar@allterum.com

Yan Moore, MD, MBA contact

6178004959

ymoore@allterum.com

7 sites in 1 country

United States7 sites, 7 recruiting
  • Children's Hospital Colorado

    Aurora, Colorado, 80045

    Kelly Faulk, MD, (720)777-6740, Kelly.Faulk@childrenscolorado.org

    Recruiting
  • Cincinnati Children's Hospital Medical Center

    Cincinnati, Ohio, 45229

    Lori Backus, 513-636-2047, lori.backus@cchmc.org

    Lauren Pommert, MD

    Not yet recruiting
  • Cook Children's Medical Center

    Fort Worth, Texas, 76104

    Heather Jernigan, 682-885-2103, Heather.Jernigan@cookchildrens.org

    Andrea Martinez, 682-303-3061, andrea.martinez@cookchildrens.org

    Recruiting
  • Texas Children's Hospital

    Houston, Texas, 77030

    Eric Schafer, MD, (832) 822-3300, esschafe@texaschildrens.org

    Recruiting
  • Riley Children's Hosptial

    Indianapolis, Indiana, 46202

    Sara Quentant, 317-948-3395, squentant@iu.edu

    Sandeep Batra, MD

    Recruiting
  • Memorial Sloan Kettering Cancer Center

    New York, New York, 10065

    Juliette Wiseman Site Contact, 855-762-0678, wisemanj@mskcc.org

    Maria Luisa Sulis, MD

    Recruiting
  • Children's Hospital of Philadelphia

    Philadelphia, Pennsylvania, 19104

    Susan Rheingold, MD, (267) 426-0762, rheingold@chop.edu

    Not yet recruiting

Other trials in United States

About this study

Official title: A First in Human, Phase 1, Open-Label Study on the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of 4A10 Monotherapy In Patients With Relapsed or Refractory Acute Lymphoblastic Leukemia or Lymphoblastic Lymphoma

ALT-101 is a first-in-human Phase 1 clinical trial testing a new antibody drug called 4A10 in patients with relapsed or hard-to-treat acute lymphoblastic leukemia (ALL) or lymphoblastic lymphoma.

4A10 is a targeted therapy designed to recognize and attach to a specific protein (CD127) found on leukemia cells. Once it binds, it works in two ways: it blocks growth signals that help cancer cells survive, and it helps the immune system find and destroy those cancer cells.

Read more

In this study, patients receive 4A10 through an intravenous (IV) infusion once a week. The main goal of the trial is to find out if the drug is safe, what dose can be given, and how the body processes it. Researchers will also look for early signs that the treatment may be working.

The study starts with small groups of patients receiving increasing doses to carefully monitor safety. Each patient is closely observed during the first treatment cycle (about 4-6 weeks) to watch for side effects. If the treatment is helping and is well tolerated, patients may continue treatment for up to six cycles.

Overall, this study is an early step in testing a new, targeted immune-based therapy for difficult-to-treat blood cancers.

Being tested
4A10
Keywords
Leukemia, Refractory, Relapsed
Medical subject headings
Precursor Cell Lymphoblastic Leukemia-Lymphoma, Leukemia, Recurrence

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • 4A10Drug

    4A10 (Molecule B4532) is an investigational human Immunoglobulin G Subclass 1 (IgG1) monoclonal antibody that specifically binds CD127 (Interleukin-7 receptor alpha subunit, IL-7Rα). CD127 is a component of the interleukin-7 receptor and the thymic stromal lymphopoietin receptor (TSLPR), which are expressed on T-cell acute lymphoblastic leukemia (T-ALL) and pre-B-cell acute lymphoblastic leukemia (B-ALL) cells.

Study groups in NCT07586618
Study groupRoleWhat they receive
Single ArmExperimentalParticipants receive 4A10 administered by intravenous route according to the protocol-defined dosing schedule in 28-day cycles until disease progression, unacceptable toxicity, withdrawal of consent, or discontinuation per investigator decision.
Receives: Drug: 4A10

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Incidence of Treatment-Emergent Adverse Events (TEAEs) at each dose level

    Assessment of safety and tolerability of 4A10 as measured by the incidence, severity, and relationship of treatment-emergent adverse events, as graded by CTCAE v6, in participants receiving study treatment at each dose-level in the 3+3 dose escalation study design.

    Measured: Through study duration, an average of 1 year

  2. Determine the Recommended Phase 2 Dose (RP2D)/ Recommended Dose for Expansion (RDE) of 4A10 as a single agent in patients with R/R ALL/LL.

    Determination of the RP2D/RDE of ALT-101 based on evaluation of safety, tolerability, and available pharmacokinetic and pharmacodynamic data following dose-escalation.

    Measured: Through study duration, an average of 1 year

Secondary outcomes (16)
  1. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL.

    Complete Remission (CR) Rate Percentage of participants who achieve Complete Remission (CR) according to standardized disease response criteria.

    Measured: Through study duration, an average of 1 year

  2. Determine the Pharmacokinetics of 4A10 as a single agent in patients with Relapsed/Refractory ALL/LL.

    Cmax (Maximum Observed Concentration):

    The highest observed plasma (or serum) concentration of 4A10 following administration. This parameter reflects the peak systemic exposure achieved after dosing.

    Measured: Through study duration, an average of 1 year

  3. Determine the Pharmacokinetics of 4A10 as a single agent in patients with Relapsed/Refractory ALL/LL.

    Tmax (Time to Maximum Concentration):

    The time elapsed from 4A10 administration to the occurrence of Cmax. This parameter describes the rate of absorption and systemic exposure onset.

    Measured: Through study duration, an average of 1 year

  4. Determine the Pharmacokinetics of 4A10 as a single agent in patients with Relapsed/Refractory ALL/LL.

    AUC (Area Under the Concentration-Time Curve):

    The integral of the plasma concentration-time curve over a defined time interval (e.g., AUC₀-t and/or AUC₀-∞), representing the total systemic exposure to 4A10 over time.

    Measured: Through the study duration, an average of 1 year.

  5. Determine the Pharmacokinetics of 4A10 as a single agent in patients with Relapsed/Refractory ALL/LL.

    T½ (Elimination Half-Life):

    The time required for the plasma concentration of 4A10 to decrease by 50% during the terminal elimination phase. This parameter reflects the rate of systemic drug elimination.

    Measured: Through the study duration, an average of 1 year

  6. Determine the Pharmacokinetics of 4A10 as a single agent in patients with Relapsed/Refractory ALL/LL.

    Vd (Volume of Distribution):

    A theoretical volume representing the extent to which 4A10 distributes into tissues relative to plasma. It provides insight into the drug's tissue distribution characteristics.

    Measured: Through the study duration, an average of 1 year

  7. Determine the Pharmacokinetics of 4A10 as a single agent in patients with Relapsed/Refractory ALL/LL.

    CL (Clearance):

    The rate at which 4A10 is removed from systemic circulation, typically expressed as volume per unit time. This parameter reflects the efficiency of drug elimination via metabolic and/or excretory pathways.

    Measured: Through the study duration, an average of 1 year

  8. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL.

    Complete Remission With Incomplete Count Recovery (CRi) Rate Percentage of participants who achieve Complete Remission with Incomplete Count Recovery (CRi) according to standardized disease response criteria.

    Measured: Through study duration, an average of 1 year.

  9. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL.

    Measurable Residual Disease (MRD) Negativity Rate Percentage of participants achieving MRD-negative status among participants who achieve CR or CRi.

    Measured: Through study duration, an average of 1 year

  10. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL.

    Duration of Response (DOR) Time from first documented CR or CRi to disease relapse, progression, or death from any cause, whichever occurs first.

    Measured: Through study duration, an average of 1 year

  11. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL.

    Time to Response (TTR) Time from initiation of study treatment to first documented achievement of CR or CRi.

    Measured: Through study duration, an average of 1 year

  12. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL.

    Event-Free Survival (EFS) Time from initiation of study treatment to treatment failure, relapse, or death from any cause.

    Measured: Through study duration, an average of 1 year

  13. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL.

    Time to Progression (TTP) Time from initiation of study treatment to documented disease progression.

    Measured: Through the study duration, an average of 1 year

  14. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL

    Overall Survival (OS) Time from initiation of study treatment to death from any cause.

    Measured: Through study duration, an average of 1 year

  15. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL

    Rate of Hematopoietic Stem Cell Transplantation (HSCT) Percentage of participants proceeding to hematopoietic stem cell transplantation following study treatment.

    Measured: Through study duration, an average of 1 year

  16. Preliminary anti-tumor activity of 4A10 as a single agent in patients with refractory/ relapsed ALL or LL

    Transfusion Independence Rate Percentage of participants achieving transfusion independence during study treatment and follow-up.

    Measured: Through study duration, an average of 1 year

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 May 2026
  2. Study start1 Jun 2026
  3. Primary completionMay 2028 (estimated)
  4. Study completionSep 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
24 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07586618
Sponsor's protocol ID
The ALLiance Study
Other IDs
5R44CA268530-02, DP230071
Acronym
ALT-101
Status last verified
Aug 2026
First submitted
22 Apr 2026
Last updated
1 Sep 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: Allterum Therapeutics is committed to responsible sharing of clinical trial data in accordance with the recommendations of the International Committee of Medical Journal Editors (ICMJE), applicable laws and regulations, and protection of participant privacy. Individual participant data (IPD) that underlie the results reported in publications arising from this study, after de-identification, may be made available to qualified researchers upon reasonable request. Supporting documents, including the study protocol, may also be made available, as appropriate. Data will become available beginning 6 months following publication of the primary study results and may remain available for up to 5 years thereafter. Requests for access must include a scientifically sound research proposal and may be subject to review by the Sponsor. Data will be provided only after execution of an appropriate data sharing agreement.

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing 4A10 in people with Lymphoblastic Lymphoma and Acute Lymphoblastic Leukemia ALL, run by Allterum Therapeutics, Inc at 7 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 1 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 7 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Shibani M Kudchadkar, MD (15153439875, skudchadkar@allterum.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Incidence of Treatment-Emergent Adverse Events (TEAEs) at each dose level (time frame: Through study duration, an average of 1 year). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 1 Sep 2026.

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