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Maintenance Chemotherapy or Observation Following Induction Chemotherapy and Radiation Therapy in Treating Younger Patients With Newly Diagnosed Ependymoma

2014-08-27 03:14:52 | BioPortfolio

Summary

RATIONALE: Drugs used in chemotherapy, such as vincristine sulfate, carboplatin, cyclophosphamide, etoposide, and cisplatin, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Giving more than one drug (combination chemotherapy) may kill more tumor cells. Radiation therapy uses high-energy x-rays to kill tumor cells. Specialized radiation therapy that delivers a high dose of radiation directly to the tumor may kill more tumor cells and cause less damage to normal tissue. Giving chemotherapy with radiation therapy may kill more tumor cells and allow doctors to save the part of the body where the cancer started.

PURPOSE: This randomized phase III trial is studying maintenance chemotherapy to see how well it works compared to observation following induction chemotherapy and radiation therapy in treating young patients with newly diagnosed ependymoma.

Description

OBJECTIVES:

Primary

- To determine the event-free survival (EFS) and overall survival (OS) of children with completely resected ependymoma treated with maintenance chemotherapy comprising vincristine sulfate, cisplatin, etoposide, and cyclophosphamide (VCEC) versus observation following post-operative conformal radiotherapy (cRT).

Secondary

- To estimate the EFS and OS of children with incompletely resected ependymoma who are unable to achieve a complete response (CR) by post-operative induction chemotherapy or by second surgery who are non-randomly assigned to cRT followed by VCEC.

- To further evaluate the EFS and OS of children with supratentorial classic ependymoma who achieve a complete resection at first or second resection or children who achieve a CR to short-course induction chemotherapy following first surgery.

- To determine the neurologic, neuropsychological, and endocrine long-term sequelae of surgery, cRT, and VCEC as compared to those patients treated on COG-ACNS0121.

- To determine biologic prognostic factors in childhood ependymoma by utilizing genomic profiles via comparative genomic hybridization and single-nucleotide polymorphism arrays, and microarray gene expression profiling analysis on initial tumor samples and correlating this with clinical outcome.

- To evaluate prognostic immune-function gene expression in ependymomas.

- To build upon the data derived from COG-ACNS0121 to develop genotypically based classification signatures and to correlate these to WHO grade, location, extent of resection, treatment, EFS, and OS.

- To evaluate telomere maintenance as a prognostic marker.

OUTLINE: This is a multicenter study. Patients are stratified according to extent of resection at initial surgery (total vs near total resection), tumor histology, and tumor location (infratentorial primary tumor vs supratentorial anaplastic tumor). Patients are randomized to 1 of 2 treatment arms. Patients with supratentorial classic tumor are assigned to arm II.

All patients receive induction chemotherapy comprising vincristine sulfate IV on days 1 and 8, carboplatin IV over 15-60 minutes on day 1, and cyclophosphamide IV over 30-60 minutes on days 1-2. Patients also receive etoposide IV over 60-120 minutes on days 1-3 of course 2 only. Treatment repeats every 3 weeks for 2 courses in the absence of disease progression or unacceptable toxicity. Patients achieving stable disease, partial response, or locally progressive disease and who are deemed potentially resectable undergo surgery within 15 days after completion of induction chemotherapy.

- Arm I: Patients undergo conformal radiotherapy over 6-7 weeks. Patients then receive vincristine sulfate IV on days 1, 8, and 15 (courses 1-3 only); etoposide IV over 1-2 hours on days 1-3; cisplatin IV over 1-8 hours on day 1; and cyclophosphamide IV over 30-60 minutes on days 1-2. Treatment repeats every 21 days for 4 courses in the absence of disease progression or unacceptable toxicity.

- Arm II: Patients undergo conformal radiotherapy over 6-7 weeks. Some patients undergo blood and tissue sample collection before treatment and after surgery for gene expression microarray, genomic hybridization array, and other correlative studies.

After completion of study therapy, patients are followed up every 4 months for 5 years.

Study Design

Allocation: Randomized, Masking: Open Label, Primary Purpose: Treatment

Conditions

Brain and Central Nervous System Tumors

Intervention

cisplatin, cyclophosphamide, etoposide, vincristine sulfate, clinical observation, 3-dimensional conformal radiation therapy

Location

UAB Comprehensive Cancer Center
Birmingham
Alabama
United States
35294

Status

Recruiting

Source

National Cancer Institute (NCI)

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:14:52-0400

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Medical and Biotech [MESH] Definitions

A semisynthetic derivative of PODOPHYLLOTOXIN that exhibits antitumor activity. Etoposide inhibits DNA synthesis by forming a complex with topoisomerase II and DNA. This complex induces breaks in double stranded DNA and prevents repair by topoisomerase II binding. Accumulated breaks in DNA prevent entry into the mitotic phase of cell division, and lead to cell death. Etoposide acts primarily in the G2 and S phases of the cell cycle.

Derivatives of chondroitin which have a sulfate moiety esterified to the galactosamine moiety of chondroitin. Chondroitin sulfate A, or chondroitin 4-sulfate, and chondroitin sulfate C, or chondroitin 6-sulfate, have the sulfate esterified in the 4- and 6-positions, respectively. Chondroitin sulfate B (beta heparin; DERMATAN SULFATE) is a misnomer and this compound is not a true chondroitin sulfate.

An inorganic and water-soluble platinum complex. After undergoing hydrolysis, it reacts with DNA to produce both intra and interstrand crosslinks. These crosslinks appear to impair replication and transcription of DNA. The cytotoxicity of cisplatin correlates with cellular arrest in the G2 phase of the cell cycle.

An enzyme that catalyzes the activation of sulfate ions by ATP to form adenosine-5'-phosphosulfate and pyrophosphate. This reaction constitutes the first enzymatic step in sulfate utilization following the uptake of sulfate. EC 2.7.7.4.

Precursor of an alkylating nitrogen mustard antineoplastic and immunosuppressive agent that must be activated in the LIVER to form the active aldophosphamide. It has been used in the treatment of LYMPHOMA and LEUKEMIA. Its side effect, ALOPECIA, has been used for defleecing sheep. Cyclophosphamide may also cause sterility, birth defects, mutations, and cancer.

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