QH103 Cell Injection for the Treatment of Relapsed/Refractory B-cell Acute Lymphoblastic Leukemia

• Status: Recruiting
• Trial end date: 2026-07-03
• Target enrollment: 0
• Participant gender: All

Summary

This is a single-arm, single-center, interventional, dose-escalation clinical study designed to evaluate the safety and tolerability of QH103 Cell Injection in the treatment of patients with relapsed/refractory B-cell acute lymphoblastic leukemia.

• Phase: Phase 1
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: Anhui Provincial Hospital
• Treatments: Cyclophosphamide; Fludarabine; Fludarabine phosphate

Criteria

Inclusion Criteria:

1. Age ≥14 years, gender is not limited;

2. Patients with clinically diagnosed relapsed/refractory B-ALL (except those presenting with extramedullary disease only), including any of the following:

1. Failure to obtain CR after 2 cycles of standard chemotherapy;

2. First induction of CR, but duration of CR is ≤12 months;

3. Relapsed/refractory B-ALL that has failed to respond to the first or multiple salvage treatments;

4. Relapse after hematopoietic stem cell transplantation, including hematological relapse and positive micro residual disease (MRD).

3. Cytological or histological confirmation of tumor cell immunophenotyping as CD19 positive;

4. Bone marrow with a ratio of ≥5% primitive/naïve lymphocytes (morphology);

5. Expected survival time of more than 3 months;

6. Eastern Cooperative Oncology Group (ECOG) score of 0-2;

7. Vital organ function meets the following requirements: left ventricular ejection fraction ≥50% on echocardiography; serum creatinine≤1.5 × upper limit of normal range (ULN); glutamine aminotransferase, aspartate aminotransferase ≤3 times ULN, total bilirubin ≤1.5 times ULN;

8. Pregnancy tests for women of childbearing age should be negative, and both men and women should agree to use effective contraception during treatment and for the following 1 year.

9. Toxicity of prior antitumor therapy ≤ grade 1 (according to CTCAE version 5.0) or acceptable inclusion/exclusion criteria level.

10. No significant hereditary disease;

11. Be able to understand the requirements and matters of the trial and be willing to participate in the clinical study as required;

12. Sign the trial informed consent form.

Exclusion Criteria:

1. with uncontrolled active central nervous system leukemia (CNSL) or a history of epilepsy, cerebrovascular disease

2. Pregnant or lactating women, or those who do not consent to the use of the drug during and within 1 year after treatment;

3. Other malignant tumors not in remission;

4. with primary immunodeficiency or autoimmune diseases requiring immunosuppressive therapy;

5. Patients who have received immune cell therapy within 6 months prior to enrollment and donor lymphocyte infusion within 6 weeks prior to enrollment.

6. Patients with confirmed positive serum anti-FMC63 and DSA reactions;

7. Patients who have participated in other clinical trials within 4 weeks prior to enrollment;

8. Uncontrolled infectious or other serious diseases, including but not limited to infections (Human Immunodeficiency Virus, acute or chronic active hepatitis B or hepatitis C), congestive heart failure, unstable angina pectoris cardiac arrhythmias, or conditions that the attending physician considers to be an unpredictable risk;

9. Uncontrollable plasma fluid, such as large pleural effusions or ascites;

10. History of stroke or intracranial hemorrhage within 3 months prior to enrollment;

11. Major surgery or trauma within 28 days prior to enrollment, or major side effects from which you have not recovered;

12. History of allergy to any of the ingredients in the cellular product;

13. Inability to understand or unwillingness to sign the informed consent form;

14. Other reasons deemed by the investigator to be unsuitable for the clinical trial.