Clinical trial NCT05926128: Study of Treatment Free Remission in Patients With Chronic Myeloid Leukemia in Chronic Phase
Official title: Prospective Study of Treatment Free Remission in Patients With Chronic Myeloid Leukemia in Chronic Phase Who Achieved Deep Molecular Response With Tyrosine Kinase Inhibitors in Real Life Setting in Argentina - (Argentine Stop Trial)
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: CML
Keywords: DISCONTINUATION
Lead sponsor: Fundaleu
Sponsor class: OTHER
First posted: 2023-07-03
Enrollment: 75
Sex: ALL
Minimum age (years): 18
Maximum age (years): 99
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: multicentre, open-label, uncontrolled trial
Primary purpose: TREATMENT

Brief summary: The principal aim of this study is to evaluate complete molecular remission in patients with chronic myeloid leukemia (CML) in deep molecular response after stopping tyrosine kinase inhibitor (TKI) treatment. The second aim is to characterize the immunological status of patients with CML at the time of TKI interruption and then at 3 months after the interruption.

Detailed description: ARGENTINA STOP TRIAL is a multicentre, open-label, uncontrolled trial to estimate the persistence of molecular remission in patients with chronic phase Chronic Myeloid Leukemia (CML) in Deep Molecular Response after stopping Tyrosine Kinase Inhibitor (TKI)

Primary Objective:

- To identify the proportion of patients who continue on Major Molecular Response after discontinuing treatment with TKI.

Secondary objectives:

* To characterize the immunological status of patients with CML at the time of interruption and then at 3 and 12 months after the interruption.

Tertiary objective: To evaluate the pharmacoeconomic impact of interrupting the treatment.

Eligibility criteria: Inclusion criteria:

1. Signed Informed consent.
2. Patients with a diagnosis of CML BCR-ABL positive in CP treated with approved TKI (Imatinib, Nilotinib or Dasatinib) in 1st line or in 2nd line due to intolerance to the 1st line or in 2nd line due to the lack of deep MR with 1st line TKI, which never presented criteria for treatment failure.
3. Age ≥ 18 years
4. ≥ 4 years of treatment with imatinib, nilotinib or dasatinib.
5. Achievement of MR 4.5 in a standardized laboratory (BCR-ABL1 IS ≤ 0.0032%).
6. Evidence of MR 4.5 sustained for ≥ 2 years, as documented in at least 4 tests performed at least 3 months apart.
7. Evidence of typical quantifiable BCR-ABL1 transcript (b3a2 \[e14a2\] and / or b2a2 \[e13a2\], typical isoforms of p210).

Exclusion criteria:

1. Patients who previously discontinued TKI and demonstrated recurrence of the disease.
2. Patients with failure to any TKI at any time.
3. Patients who presented accelerated phase or CML in blast crisis at any time.
4. Patients with atypical transcript not quantifiable by RT qPCR
5. BCR-ABL mutation detected at any time during the course of the resistant disease

Primary outcomes:
measure: Molecular relapse free survival during 24 months
timeFrame: 24 months
Secondary outcomes:
measure: Treatment-free survival during 24 months
timeFrame: 24 months
Other outcomes:
measure: Overall survival during 24 months
timeFrame: 24 months
measure: Pharmacoeconomic analysis during 24 months
timeFrame: 24 months
Locations:
city: Ciudad Autonoma de Buenos Aire
country: Argentina
facility: FUNDALEU
state: Ciudad Autonoma De Buenos Aires
Study officials:
References: