Clinical trial NCT06530576: Thalidomide for the Symptomatic Large Granular Lymphocytic Leukemia
Official title: The Efficacy of Thalidomide for the Symptomatic Large Granular Lymphocytic Leukemia - a Prospective Phase Ⅱ Multicenter Clinical Trial From China
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: PHASE2
Conditions: T-LGL Leukemia
NK-LGL Leukemia
Keywords: Large granular lymphocyte leukemia
Thalidomide
Overall response rate
Lead sponsor: Institute of Hematology & Blood Diseases Hospital, China
Sponsor class: OTHER
First posted: 2024-07-31
Enrollment: 48
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: Thalidomide at a dose of 50-100 mg/QN
Primary purpose: TREATMENT

Brief summary: There is currently no standard first-line treatment for LGLL. The investigators used the TPM regimen (thalidomide + prednison + methotrexate ) to treat LGLL since 2020, enrolling a total of 54 patients and achieving an overall response rate (ORR) of 88.9% and a complete response (CR) rate of 75.9%. To further explore this hypothesis, the investigators designed this study to observe the efficacy of thalidomide monotherapy in patients with symptomatic LGLL. The investigators speculate that thalidomide plays a major role in the significant improvement of the TPM regimen compared to the MTX regimen.

Patients with LGLL are treated with thalidomide at 50 to 100 mg. If the desired response is not achieved at specific time points, methotrexate is added. Thalidomide monotherapy is administered for up to 3 courses, and the TM regimen can also be used for up to 3 courses. The overall response rate with thalidomide monotherapy serves as the primary study endpoint.

Detailed description: The regimen is an oral treatment with a cycle of 4 months. All patients first receive monotherapy with thalidomide at a dose of 50-100 mg/QN. After 4 months, the efficacy is evaluated. If effective, the monotherapy continues for another 4 months. If complete remission (CR) is achieved, the treatment is consolidated for another 4 months before stopping, for a total of 3 courses. If CR is achieved at any point within the first year, the treatment is consolidated for one more course and then stopped. If partial remission (PR) is not achieved within the first cycle, or CR is not achieved within the second cycle, methotrexate 10 mg/m2 orally once a weekis a is dded for consolidation, with each cycle lasting 4 months. After a maximum of 3 cycles, treatment is stopped. Patients who do not achieve PR after 2 cycles of the TM regimen will be withdrawn from the study, with a maximum of 3 cycles allowed.

Eligibility criteria: Inclusion Criteria:

1. The patient fully understands the study, voluntarily participates, and signs the informed consent form (ICF);
2. The patient must meet the diagnostic criteria for LGLL;
3. The patient can be of any gender, aged 18 years or older;
4. The patient is either untreated or not properly treated previously, or has poor efficacy (not reaching PR) or relapsed after being treated with regimens not based on methotrexate/thalidomide;
5. The patient has indications for LGLL treatment, meeting at least one of the following criteria:

   1. ANC \< 0.5 × 10\^9/L, or neutropenia with recurrent infections
   2. HGB \< 100 g/L or requiring red blood cell transfusions for maintenance
   3. PLT \< 50 × 10\^9/L
   4. Concurrent autoimmune disease requiring treatment
   5. Symptomatic splenomegaly
   6. Severe B symptoms (unexplained fever, temperature over 38°C; night sweats; weight loss of 10% or more within six months)
   7. Pulmonary hypertension;
6. ECOG score of 0-2;
7. The patient's expected survival period is 6 months or more.

Exclusion Criteria:

1. Unable to understand or follow the study procedures;
2. Diagnosed or treated for malignancies other than LGLL within the past five years;
3. Non-lymphoma-related liver or kidney function impairment: ALT \> 3 times the upper limit of normal (ULN), AST \> 3 times the ULN, total bilirubin (TBIL) \> 2 times the ULN, serum creatinine clearance \< 30 ml/min;
4. Other serious medical conditions that could affect the study (e.g., uncontrolled diabetes, gastric ulcer, other serious heart or lung diseases), with the judgment resting with the investigator;
5. Caprini thrombosis analysis score indicating high risk (Appendix 2);
6. Known history of HIV infection or active HBV infection, or any uncontrolled active systemic infection requiring intravenous antibiotics; Note: Active HBV infection is defined as: a. HBV DNA ≥ 2000 IU/ml; b. ALT ≥ 2 times the ULN; c. Exclusion of hepatitis due to the disease itself, drugs, or other causes. All three conditions must be met. If a patient initially has active HBV infection and turns into inactive HBV infection after anti-HBV treatment, they can be included in the study provided they receive adequate anti-HBV treatment.
7. Patients who have undergone major surgery (excluding lymph node biopsy) within the past 14 days or are expected to undergo major surgery during the treatment;
8. Pregnant or breastfeeding women, and women of childbearing age who are not using contraception;
9. Hypersensitivity to the drugs or their components used in the study.

Primary outcomes:
measure: Overall response rate
timeFrame: up to 5 years
Secondary outcomes:
measure: The safety of thalidomide
timeFrame: up to 5 years
measure: Complete remession rate
timeFrame: up to 5 years
measure: The rate of improvement in efficacy after TM combination
timeFrame: up to 5 years
measure: Progression-free survival
timeFrame: up to 5 years
measure: Overall survival
timeFrame: up to 5 years
measure: Duration of remission
timeFrame: up to 5 years
Other outcomes:
Locations:
city: Tianjin
country: China
facility: Institute of Hematology & Blood Diseases Hospital
state: Tianjin
Study officials:
affiliation: Institute of Hematology & Blood Diseases Hospital, China
name: Shuhua Yi, Doctor
role: PRINCIPAL_INVESTIGATOR
References: