Studying Biomarkers as a Diagnostic Tool in Samples From Younger Patients With B-Cell Acute Lymphoblastic Leukemia

Children's Oncology Group

Status: Completed

Conditions: Recurrent Childhood Acute Lymphoblastic Leukemia; B-cell Childhood Acute Lymphoblastic Leukemia; Childhood Acute Lymphoblastic Leukemia in Remission

Treatments: Other: laboratory biomarker analysis

Study type: Observational

Funder types: NETWORK; NIH

Identifiers

NCT01540578

NCI-2012-00685 (Registry Identifier)

AALL12B3

Details and patient eligibility

About

This clinical trial is studying biomarkers as a diagnostic tool in samples from younger patients with B-cell acute lymphoblastic leukemia. Finding specific biomarkers may help improve the treatment of patients with B-cell acute lymphoblastic leukemia

Full description

STUDY SUBTYPE: Ancillary/Correlative

OBSERVATIONAL STUDY MODEL: Case-only

TIME PERSPECTIVE: Retrospective

BIOSPECIMEN RETENTION: Samples with DNA

BIOSPECIMEN DESCRIPTION: Fresh and frozen bone marrow cells

STUDY POPULATION DESCRIPTION: Patients with B-cell acute lymphoblastic samples banked at the COG Cell Bank

SAMPLING METHOD: Non-probability sample

OBJECTIVES:

I. To determine whether we can identify individuals within a specific sub-group of pre-B acute lymphoblastic leukemia (ALL) patients that will eventually recur.

II. To identify replication-timing changes as a biomarker for further risk prediction.

III. To identify differences between patients of similar subtype, and choose candidate differences to analyze by methods that are compatible with frozen samples.

OUTLINE:

Archived cell samples are analyzed for replication timing by flow cytometry, microarray, and single-cell fluorescence in situ hybridization (FISH) assays. Replication-timing results among cases and controls are also analyzed.

Enrollment: 70 patients

Sex: All

Volunteers: No Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria:

• Frozen viable cell samples from patients with B-cell acute lymphoblastic (ALL) of any outcome from the Children's Oncology Group (COG) ALL Cell Bank (Part 1)

• Freshand frozen cell samples from patients with B-cell ALL with known outcomes from the COG ALL Cell Bank (Part 2) meeting 1 of the following criteria:

  • Samples from patients who experienced an early recurrence within 36 months of diagnosis (cases)
  • Samples from patients who remain in prolonged remission (controls)

• No samples meeting either of the following criteria:

  • Very-high-risk features

    • Philadelphia chromosome positive
    • Hypodiploid
    • MLL (11q23) rearranged

  • Known favorable risk factors

    • Hyperdiploid
    • t(12;21) (ETV6/RUNX1)

Trial design

70 participants in 1 patient group

Observational

Description:

Archived cell samples are analyzed for replication timing by flow cytometry, microarray, and single-cell fluorescence in situ hybridization (FISH) assays. Replication-timing results among cases and controls are also analyzed.

Treatment:

Other: laboratory biomarker analysis