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Study of Blood Samples From Newborns With Down Syndrome

Conditions

Leukemia

Trial Phase

N/A

Trial Purpose and Description

Trial Purpose

RATIONALE: Studying the genes expressed in samples of blood from patients with Down syndrome may help doctors identify biomarkers related to cancer.

PURPOSE: This research study is looking at blood samples from newborns with Down syndrome.


Trial Description

OBJECTIVES:

  • To further our biological understanding of the natural history of transient myeloproliferative disorder (TMD) and its relationship to subsequent leukemia by facilitating the development of a TMD cell and protein bank, and repository of DNA/RNA from megakaryoblasts for future biological studies.
  • To investigate the biology of TMD molecular changes associated with resolution of TMD or its conversion to acute myeloid leukemia within each mortality-risk group by conducting GATA1 mutational analyses, hematopoiesis clonality studies, assessment of RAS mutations, and genomic instability studies using glycophorin A assays.
  • To determine if high-resolution microarray genomic analysis of TMD blasts (using Affymetrix SNP Genechip technology to assess gene expression, copy number variation, and loss of heterozygosity) can predict the development of subsequent leukemia.
  • To determine the relationship of minimal residual disease (monitored by peripheral blood flow cytometry and GATA1 mutational studies) to clinical remission status and development of subsequent leukemia within each mortality-risk group of TMD patients.
  • To evaluate the relationship between karyotype (including FISH analysis) and subsequent leukemia in TMD patients.
  • To examine pharmacogenetics and in vitro drug sensitivity to cytarabine (MTT assay) in blasts from TMD patients.
  • To examine the relationship of functional polymorphisms in Phase I and Phase II drug detoxification genes, DNA repair, and DNA synthesis pathways that may modify susceptibility to leukemia and outcome in TMD patients.
  • To determine the relationship between fibrosis-associated serum factors (e.g., platelet-derived growth factor, transforming growth factor beta, N-terminal peptide of III procollagen, type IV collagen, and hyaluronic acid) and event-free survival.

OUTLINE: This is a multicenter study.

Patients undergo peripheral blood collection periodically for biomarker analysis. Samples are analyzed for GATA1 mutations by real-time PCR, polymorphisms, cytogenetics, - and K-RAS mutations, gene expression, drug sensitivity patterns, and minimal residual disease by flow cytometry.

Patients are followed up periodically for 5 years.


Participation Guidelines

Age:
N/A - 1 Year
Gender:
Both

Eligibility Criteria


DISEASE CHARACTERISTICS:

- Diagnosis of transient myeloproliferative disorder (TMD) at < 90 days of age and
meeting 1 of the following criteria:

- A diagnosis of Down syndrome or Down syndrome mosaicism AND non-erythroid and
non-lymphoid blasts (any amount) in the peripheral blood verified with a second
sample

- Patients with typical physical characteristics of Down syndrome are allowed
before cytogenetic or FISH confirmation of the diagnosis

- Trisomy 21-positive leukemic blasts documented by biopsy of any organ (including
> 5% non-erythroid/non-lymphoid blasts documented by bone marrow aspirate or
biopsy)

- Infants with isolated trisomy 21 positivity identified only in the leukemic
blasts are allowed

- Institutional immunophenotype characterization is required for study enrollment

PATIENT CHARACTERISTICS:

- Not specified

PRIOR CONCURRENT THERAPY:

- Not specified
Sponsor:
Children's Oncology Group
National Cancer Institute (NCI)
Dates:
February 2009
Last Updated:
August 4, 2014
Study HIC#:

Clinicaltrials.gov ID: NCT00959283