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NCT Number: NCT07259161

Modified Conditioning Regimen for CML-BP

Study on the Efficacy and Safety of a Reduced-Toxicity Conditioning Regimen Containing Thiotepa and Melphalan in Patients with Blast Phase Chronic Myeloid Leukemia

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Key information

Conditions

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • (1) Confirmed diagnosis of blast-phase chronic myeloid leukemia, with diagnostic criteria referring to the 2020 Chinese Guidelines for Diagnosis and Treatment of Chronic Myeloid Leukemia.

Diagnostic criteria for chronic myeloid leukemia: Typical clinical manifestations combined with the presence of Philadelphia chromosome and/or BCR-ABL fusion gene positivity confirm the diagnosis.

Diagnostic criteria for blast phase:

  • Peripheral blood or bone marrow blasts ≥20%
  • Aggregates of blasts on bone marrow biopsy
  • Extramedullary blast cell infiltration (2) Age ≥18 years (3) Ability to provide self-signed informed consent (4) Must meet adequate organ function requirements:

Renal and hepatic function as follows:

AST, ALT and ALP <2× upper limit of normal (ULN) Total bilirubin <1.5× ULN Creatinine clearance >50 mL/min

Pancreatic function:

Serum amylase ≤1.5× ULN Serum lipase ≤1.5× ULN

Normal cardiac function:

Ejection fraction (EF) >60% Pulmonary artery systolic pressure ≤50 mmHg (5) HIV negative, HBV negative, HCV negative (6) Eastern Cooperative Oncology Group Performance Status (ECOG-PS) score of 0-2 (7) Signed informed consent must be obtained before study procedures begin. For subjects aged 18 years or older, informed consent shall be signed by the patient themselves or direct family members. Considering the patient's medical condition, if the patient's own signature is medically inadvisable, the informed consent shall be signed by a legal guardian or the patient's direct family member.

Exclusion criteria

  • 1. (1) Patients with previous autologous or allogeneic stem cell transplantation; (2) Patients concurrently diagnosed with other malignant tumors; patients assessed by investigators as having concomitant diseases that severely endanger their life safety or affect their ability to complete this study; (3) Patients with psychiatric disorders or other medical conditions that cannot comply with the requirements of study treatment and monitoring; (4) Patients unable or unwilling to sign the consent form; (5) Pregnant or lactating women; (6) Patients assessed by investigators as ineligible due to other special circumstances.

Treatment and study plan

Enrolled patients with blast-phase chronic myeloid leukemia received a reduced-toxicity conditioning regimen containing thiotepa, melphalan, and fludarabine prior to undergoing allogeneic hematopoie

Drug

This study is a prospective, interventional clinical trial recruiting patients with blast-phase chronic myeloid leukemia from the Stem Cell Transplantation Center of the Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, with an anticipated enrollment of 40 cases. Enrolled patients are scheduled to receive a reduced-toxicity conditioning regimen containing thiotepa, melphalan, and fludarabine for allogeneic hematopoietic stem cell transplantation. Thiotepa 5mg/kg on days -8 and -7, melphalan 60mg/m2 on days -5 and -4, Flu 30mg/m2 from day -6 to day -2.

Primary outcomes

  1. overall survival, OS

    Time frame: 2 year

Secondary outcomes

  1. Relapse free survival, RFS

    Time frame: 2 year

  2. TRM

    Time frame: 2 year

    Treatment relater mortality

  3. CIR

    Time frame: 2 year

    cumulative incidence of relapse

  4. safety and toxicity of conditioning regimen

    Time frame: 2 year

    Evaluate the side effects and safety of the regimen, using Bearman score system

Study contacts

Contact information is provided by the study sponsor or research team.

Erlie Jiang

CONTACT

[email protected]

022-23608569

Sponsors and collaborators

Lead sponsor

Institute of Hematology & Blood Diseases Hospital, China

Other

Registry information

Official study title

Prospective, Single-Arm Study on the Efficacy of a Reduced-Toxicity Conditioning Regimen Containing Thiotepa and Melphalan for Patients With Blast Phase Chronic Myeloid Leukemia

Important dates

Study start
2025
Primary completion
2029
Study completion
2029
First posted
Dec 2, 2025
Registry last updated
Dec 2, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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