Ignite Creation Date:
2025-12-24 @ 9:14 PM
Ignite Modification Date:
2025-12-25 @ 7:03 PM
Study NCT ID:
NCT00898404
Status:
COMPLETED
Last Update Posted:
2016-05-11
First Post:
2009-05-09
Is NOT Gene Therapy:
False
Has Adverse Events:
False
Brief Title:
Response or Resistance to Chemotherapy in Young Patients With Acute Lymphoblastic Leukemia Treated With Methotrexate
Sponsor:
Children's Oncology Group
Organization:
Study Overview
Official Title:
Molecular Correlates of Methotrexate in Childhood ALL
Status:
COMPLETED
Status Verified Date:
2016-05
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
This laboratory study is looking at response or resistance to chemotherapy in young patients with acute lymphoblastic leukemia treated with methotrexate. Studying samples of tumor tissue in the laboratory from patients with cancer may help doctors learn more about changes that occur in DNA and drug resistance in patients.
Detailed Description:
OBJECTIVES:
I. Determine the molecular basis for human reduced folate carrier (hRFC) transcripts in B-precursor and T-cell acute lymphoblastic leukemia (ALL) blasts obtained from children with newly diagnosed ALL subsequently treated with methotrexate.
II. Correlate hRFC expression in these specimens with methotrexate transport and sensitivities.
III. Determine the roles of high frequency gene/transcript variants for hRFC as determinants of response and resistance to methotrexate in these patients.
IV. Determine the roles of multidrug resistance-associated proteins as determinants of response and resistance to methotrexate and mercaptopurine in these patients.
OUTLINE: This is a multicenter study.
Tumor diagnostic specimens from patients who subsequently failed therapy within 4 years of diagnosis or who did not fail therapy within 4 years of diagnosis (control patients) are obtained from the Children's Oncology Group cellbank. Specimens are studied for molecular determinants of human reduced folate carrier (hRFC) gene expression and gene sequence alterations using reverse transcriptase-polymerase chain reaction (RT-PCR), thymidylate synthase inhibition assay, Rnase protection assay, or 5'RACE. Multidrug resistance proteins are also studied by RT-PCR.
A certificate of confidentiality protecting the identity of research participants in this project has been issued by the National Cancer Institute.
I. Determine the molecular basis for human reduced folate carrier (hRFC) transcripts in B-precursor and T-cell acute lymphoblastic leukemia (ALL) blasts obtained from children with newly diagnosed ALL subsequently treated with methotrexate.
II. Correlate hRFC expression in these specimens with methotrexate transport and sensitivities.
III. Determine the roles of high frequency gene/transcript variants for hRFC as determinants of response and resistance to methotrexate in these patients.
IV. Determine the roles of multidrug resistance-associated proteins as determinants of response and resistance to methotrexate and mercaptopurine in these patients.
OUTLINE: This is a multicenter study.
Tumor diagnostic specimens from patients who subsequently failed therapy within 4 years of diagnosis or who did not fail therapy within 4 years of diagnosis (control patients) are obtained from the Children's Oncology Group cellbank. Specimens are studied for molecular determinants of human reduced folate carrier (hRFC) gene expression and gene sequence alterations using reverse transcriptase-polymerase chain reaction (RT-PCR), thymidylate synthase inhibition assay, Rnase protection assay, or 5'RACE. Multidrug resistance proteins are also studied by RT-PCR.
A certificate of confidentiality protecting the identity of research participants in this project has been issued by the National Cancer Institute.
Study Oversight
Has Oversight DMC:
False
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
Secondary ID Infos
| Secondary ID | Type | Domain | Link | View |
|---|---|---|---|---|
| NCI-2009-00308 | REGISTRY | CTRP (Clinical Trial Reporting Program) | View | |
| CDR0000346452 | OTHER | Clinical Trials.gov | View | |
| COG-AALL04B1 | OTHER | Children's Oncology Group | View | |
| R01CA076641 | NIH | None | https://reporter.nih.gov/quic… | View |