Abstract | BACKGROUND: Ninety percent of children with diffuse, intrinsic brainstem tumors will die within 18 months of diagnosis. Radiotherapy is of transient benefit to these children, and a potential way to improve its efficacy is to add radiosensitizers. Carboplatin is antineoplastic and radiosensitizing; however, its delivery to the primary tumor site is problematic. RMP-7 is a bradykinin analog that causes selective permeability of the blood- brain-tumor interface. The objective of this Phase I study was to determine the toxicity and feasibility of delivering RMP-7 and carboplatin for 5 successive days during radiotherapy to children with newly diagnosed, diffuse, intrinsic brainstem gliomas. METHODS:
RMP-7 was given prior to the end of carboplatin infusion. Local radiotherapy, in dose fractions of 180 centigrays (cGy) per day (to a total dose of 5940 cGy), was given within 4 hours of completion of drug delivery. Duration of treatment was escalated in a stepwise, weekly fashion in cohorts of 3 patients, until there was treatment-limiting toxicity or until radiotherapy was completed. Thirteen patients were treated, and their median age was 7 years (age range, 3-12 yrs). RESULTS: One child died early during treatment of progressive disease and was not assessable for toxicity. Treatment for 3 weeks, 4 weeks, and 5 weeks was tolerated well, with mild flushing, tachycardia, nausea, emesis, dizziness, and abdominal pain. One of 3 children treated at the full duration of therapy (33 doses over 7 weeks) developed dose-limiting hepatotoxicity and neutropenia. The estimated median survival was 328 days, and 1 patient remained free of disease progression for > 400 days after the initiation of treatment. CONCLUSIONS:
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Authors | Roger J Packer, Mark Krailo, Minesh Mehta, Katherine Warren, Jeffrey Allen, Regina Jakacki, Judith G Villablanca, Akiko Chiba, Gregory Reaman |
Journal | Cancer
(Cancer)
Vol. 104
Issue 9
Pg. 1968-74
(Nov 01 2005)
ISSN: 0008-543X [Print] United States |
PMID | 16177987
(Publication Type: Clinical Trial, Phase I, Journal Article)
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Copyright | (c) 2005 American Cancer Society. |
Chemical References |
- RMP 7
- Carboplatin
- Bradykinin
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Topics |
- Antineoplastic Combined Chemotherapy Protocols
(therapeutic use)
- Bradykinin
(analogs & derivatives, therapeutic use)
- Brain Stem Neoplasms
(drug therapy, radiotherapy)
- Carboplatin
(therapeutic use)
- Child
- Child, Preschool
- Combined Modality Therapy
- Drug Administration Schedule
- Feasibility Studies
- Female
- Glioma
(drug therapy, radiotherapy)
- Humans
- Male
- Radiotherapy
(adverse effects)
- Radiotherapy Dosage
- Survival Rate
- Treatment Outcome
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