NK cell therapy for relapsed acute myeloid leukemia

Clinical Study on the Safety and Efficacy of QN-023a Targeting CD33 in Acute Myeloid Leukemia

PHASE1 · Zhejiang University · NCT05665075

This study is testing a new type of immune cell therapy to see if it can help people with relapsed acute myeloid leukemia feel better and improve their treatment outcomes.

Quick facts

PhasePHASE1
Study typeInterventional
Enrollment19 (estimated)
Ages18 Years and up
SexAll
SponsorZhejiang University (other)
Locations1 site (Hangzhou, Zhejiang)
Trial IDNCT05665075 on ClinicalTrials.gov

What this trial studies

This open-label, Phase I study evaluates the safety, tolerability, and preliminary efficacy of QN-023a, an allogeneic CAR-NK cell therapy targeting CD33, in patients with relapsed or refractory Acute Myeloid Leukemia (AML). The study will utilize a '3+3' enrollment schema during the dose escalation phase, aiming to enroll up to 19 patients. Participants will receive QN-023a along with other chemotherapy agents such as Cyclophosphamide, Fludarabine, Cytarabine, and VP-16.

Who should consider this trial

Good fit: Ideal candidates include adults aged 18 and older with relapsed/refractory AML and CD33 positive leukemia cells.

Not a fit: Patients with acute promyelocytic leukemia, central nervous system leukemia, or those with uncontrolled infections may not benefit from this study.

Why it matters

Potential benefit: If successful, this therapy could provide a new treatment option for patients with relapsed or refractory AML.

How similar studies have performed: While this approach is innovative, similar studies targeting CD33 in AML have shown promise, indicating potential for success.

Eligibility criteria

Show full inclusion / exclusion criteria
Key Inclusion Criteria:

* Provision of signed and dated informed consent form (ICF)
* ≥18 years old
* Diagnosis of r/r AML
* Subjects with CD33 positive leukemia cells
* Eastern Cooperative Oncology Group (ECOG) performance status ≤1
* Adequate organ function as defined in the protocol
* Donor specific antibody (DSA) to QN-023a: MFI \<= 2000

Key Exclusion Criteria:

* Allergic to drug used in this study
* Accept other anti-tumor drugs/therapies within certain time of day 0 (first QN-023a dose infusion), time window and drug defined in the protocol.
* received systemic immunosuppressive therapy within 7 days of day 0, or likely to require systemic immunosuppressive therapy
* Acute Promyelocytic Leukemia (APL)
* Central nervous system Leukemia.
* Uncontrolled, active clinically significant infection
* Clinically significant cardiovascular disease as defined in the protocol
* Known HIV infection, active Hepatitis B (HBV) or Hepatitis C (HCV) infection
* History of central nervous system (CNS) disease such as stroke, epilepsy.
* Females are pregnant or lactating
* Investigator-assessed presence of any medical or social issues that are likely to interfere with study conduct or may cause increased risk to subject

Where this trial is running

Hangzhou, Zhejiang

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: AML, Adult

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.