Pediatric Astrocytoma Medication
- Author: Tobey MacDonald, MD; Chief Editor: Max J Coppes, MD, PhD, MBA more...
Medication Summary
Current investigational dosing chemotherapy regimens for the treatment of low-grade astrocytomas with carboplatin and vincristine and for the treatment of high-grade astrocytomas with temozolomide,[7] carmustine (BCNU), and cisplatin are provided below.
Antineoplastic agents
Class Summary
These agents disrupt DNA replication, which inhibits tumor growth and promotes tumor cell death. Cancer chemotherapy is based on an understanding of tumor cell growth and how drugs affect this growth. After cells divide, they enter a period of growth (phase G1), followed by DNA synthesis (phase S). The next phase is a premitotic phase (G2), then finally a mitotic cell division (phase M).
The cell division rate varies for different tumors. Most common cancers increase very slowly in size compared to normal tissues, and the rate may decrease further in large tumors. This difference allows normal cells to recover from chemotherapy more quickly than malignant ones and is the rationale behind current cyclic dosage schedules.
Antineoplastic agents interfere with cell reproduction. Some agents are cell cycle specific, while others (eg, alkylating agents, anthracyclines, cisplatin) are not phase-specific. Cellular apoptosis (ie, programmed cell death) is also a potential mechanism of many antineoplastic agents.
Temozolomide (Temodar)
Prodrug that is hydrolyzed to MTIC at physiologic pH. Exerts its effect by site-specific DNA cross-linking resulting from the methylation guanine at the O6 and N7 positions. Bioavailability is 100%; approximately 35% crosses the blood-brain barrier.
Carboplatin (Paraplatin)
Analog of cisplatin. This is a heavy metal coordination complex that exerts its cytotoxic effect by platination of DNA, a mechanism analogous to alkylation, leading to interstrand and intrastrand DNA crosslinks and inhibition of DNA replication.
Vincristine (Oncovin)
Plant-derived vinca alkaloid. Acts as a mitotic inhibitor by binding tubulin.
Carmustine (BiCNU)
This DNA alkylator causes interstrand and intrastrand DNA crosslinks, resulting in damage to the DNA template and inhibition of DNA replication.
Cisplatin (Platinol)
This heavy metal coordination complex exerts its cytotoxic effect by platination of DNA, a mechanism analogous to alkylation, leading to interstrand and intrastrand DNA crosslinks and inhibition of DNA replication.
Hales RK, Shokek O, Burger PC, Paynter NP, Chaichana KL, Quiñones-Hinojosa A, et al. Prognostic factors in pediatric high-grade astrocytoma: the importance of accurate pathologic diagnosis. J Neurooncol. Aug 2010;99(1):65-71. [Medline].
Tihan T, Ersen A, Qaddoumi I, Sughayer MA, Tolunay S, Al-Hussaini M, et al. Pathologic characteristics of pediatric intracranial pilocytic astrocytomas and their impact on outcome in 3 countries: a multi-institutional study. Am J Surg Pathol. Jan 2012;36(1):43-55. [Medline].
Belirgen M, Berrak SG, Ozdag H, Bozkurt SU, Eksioglu-Demiralp E, Ozek MM. Biologic tumor behavior in pilocytic astrocytomas. Childs Nerv Syst. Mar 2012;28(3):375-89. [Medline].
Chintagumpala MM, Friedman HS, Stewart CF, et al. A phase II window trial of procarbazine and topotecan in children with high-grade glioma: a report from the children's oncology group. J Neurooncol. Apr 2006;77(2):193-8. [Medline].
Geyer JR, Sposto R, Jennings M, et al. Multiagent chemotherapy and deferred radiotherapy in infants with malignant brain tumors: a report from the Children's Cancer Group. J Clin Oncol. Oct 20 2005;23(30):7621-31. [Medline].
Pollack IF, Hamilton RL, Sobol RW, et al. O6-methylguanine-DNA methyltransferase expression strongly correlates with outcome in childhood malignant gliomas: results from the CCG-945 Cohort. J Clin Oncol. Jul 20 2006;24(21):3431-7. [Medline].
Akyüz C, Demir HA, Varan A, Yalçin B, Kutluk T, Büyükpamukçu M. Temozolomide in relapsed pediatric brain tumors: 14 cases from a single center. Childs Nerv Syst. Jan 2012;28(1):111-5. [Medline].
Bouffet E, Jakacki R, Goldman S, et al. Phase II Study of weekly vinblastine in recurrent/refractory pediatric low-grade gliomas. Neuro-Oncology. 2008;10(3):450.
Bredel M, Pollack IF, Hamilton RL, James CD. Epidermal growth factor receptor expression and gene amplification in high-grade non-brainstem gliomas of childhood. Clin Cancer Res. Jul 1999;5(7):1786-92. [Medline].
Cokgor I, Friedman AH, Friedman HS. Gliomas. Eur J Cancer. Nov 1998;34(12):1910-5; discussion 1916-8. [Medline].
Fernandez C, Figarella-Branger D, Girard N, et al. Pilocytic astrocytomas in children: prognostic factors--a retrospective study of 80 cases. Neurosurgery. Sep 2003;53(3):544-53; discussion 554-5. [Medline].
Finlay JL, Boyett JM, Yates AJ, et al. Randomized phase III trial in childhood high-grade astrocytoma comparing vincristine, lomustine, and prednisone with the eight-drugs-in-1-day regimen. Childrens Cancer Group. J Clin Oncol. Jan 1995;13(1):112-23. [Medline].
Finlay JL, Wisoff JH. The impact of extent of resection in the management of malignant gliomas of childhood. Childs Nerv Syst. Nov 1999;15(11-12):786-8. [Medline].
Gilbertson RJ, Hill DA, Hernan R, et al. ERBB1 is amplified and overexpressed in high-grade diffusely infiltrative pediatric brain stem glioma. Clin Cancer Res. Sep 1 2003;9(10 Pt 1):3620-4. [Medline].
Grill J, Couanet D, Cappelli C, et al. Radiation-induced cerebral vasculopathy in children with neurofibromatosis and optic pathway glioma. Ann Neurol. Mar 1999;45(3):393-6. [Medline].
Gururangan S, Fisher MJ, Allen JC, Herndon JE 2nd, Quinn JA, Reardon DA, et al. Temozolomide in children with progressive low-grade glioma. Neuro Oncol. Apr 2007;9(2):161-8. [Medline].
Guthrie BL, Laws ER Jr. Supratentorial low-grade gliomas. Neurosurg Clin N Am. Jan 1990;1(1):37-48. [Medline].
Huncharek M, Wheeler L, McGarry R, Geschwind JF. Chemotherapy response rates in recurrent/progressive pediatric glioma; results of a systematic review. ALYSIS. Jul-Aug 1999;19(4C):3569-74. [Medline].
Jacobson DM. Gliomas of the anterior visual pathways. Neurosurg Clin N Am. Oct 1999;10(4):683-98, ix. [Medline].
Khatua S, Peterson KM, Brown KM, et al. Overexpression of the EGFR/FKBP12/HIF-2alpha pathway identified in childhood astrocytomas by angiogenesis gene profiling. Cancer Res. Apr 15 2003;63(8):1865-70. [Medline].
Khaw SL, Coleman LT, Downie PA, Heath JA, Ashley DM. Temozolomide in pediatric low-grade glioma. Pediatr Blood Cancer. Nov 2007;49(6):808-11. [Medline].
Komotar RJ, Mocco J, Carson BS, et al. Pilomyxoid astrocytoma: a review. MedGenMed. 2004;6(4):42. [Medline].
Kuo DJ, Weiner HL, Wisoff J, et al. Temozolomide is active in childhood, progressive, unresectable, low-grade gliomas. J Pediatr Hematol Oncol. May 2003;25(5):372-8. [Medline].
Lafay-Cousin L, Holm S, Qaddoumi I, et al. Weekly vinblastine in pediatric low-grade glioma patients with carboplatin allergic reaction. Cancer. Jun 15 2005;103(12):2636-42. [Medline].
MacDonald TJ, Arenson EB, Ater J, et al. Phase II study of high-dose chemotherapy before radiation in children with newly diagnosed high-grade astrocytoma: final analysis of Children's Cancer Group Study 9933. Cancer. Dec 15 2005;104(12):2862-71. [Medline].
Nadkarni TD, Rekate HL. Pediatric intramedullary spinal cord tumors. Critical review of the literature. Childs Nerv Syst. Jan 1999;15(1):17-28. [Medline].
Nicholson HS, Krailo M, Ames MM, et al. Phase I study of temozolomide in children and adolescents with recurrent solid tumors: a report from the Children's Cancer Group. J Clin Oncol. Sep 1998;16(9):3037-43. [Medline].
Packer RJ. Brain tumors in children. Arch Neurol. Apr 1999;56(4):421-5. [Medline].
Pencalet P, Maixner W, Sainte-Rose C, et al. Benign cerebellar astrocytomas in children. J Neurosurg. Feb 1999;90(2):265-73. [Medline].
Pollack IF. The role of surgery in pediatric gliomas. J Neurooncol. May 1999;42(3):271-88. [Medline].
Pollack IF, Boyett JM, Finlay JL. Chemotherapy for high-grade gliomas of childhood. Childs Nerv Syst. Oct 1999;15(10):529-44. [Medline].
Pollack IF, Finkelstein SD, Woods J, et al. Expression of p53 and prognosis in children with malignant gliomas. N Engl J Med. Feb 7 2002;346(6):420-7. [Medline].
Prados MD, Edwards MS, Rabbitt J, Lamborn K, Davis RL, Levin VA. Treatment of pediatric low-grade gliomas with a nitrosourea-based multiagent chemotherapy regimen. J Neurooncol. May 1997;32(3):235-41. [Medline].
Reddy AT, Packer RJ. Chemotherapy for low-grade gliomas. Childs Nerv Syst. Oct 1999;15(10):506-13. [Medline].
Rubin G, Michowitz S, Horev G, et al. Pediatric brain stem gliomas: an update. Childs Nerv Syst. Apr-May 1998;14(4-5):167-73. [Medline].
Sharif S, Ferner R, Birch JM, et al. Second primary tumors in neurofibromatosis 1 patients treated for optic glioma: substantial risks after radiotherapy. J Clin Oncol. Jun 1 2006;24(16):2570-5. [Medline].
Stupp R, Mason WP, van den Bent MJ, et al. Radiotherapy plus concomitant and adjuvant temozolomide for glioblastoma. N Engl J Med. Mar 10 2005;352(10):987-96. [Medline].
Thorarinsdottir HK, Rood B, Kamani N, et al. Outcome for children < 4 years of age with malignant central nervous system tumors treated with high-dose chemotherapy and autologous stem cell rescue. Pediatr Blood Cancer. Feb 2 2006;[Medline].
Vredenburgh JJ, Desjardins A, Herndon JE 2nd, et al. Bevacizumab plus irinotecan in recurrent glioblastoma multiforme. J Clin Oncol. Oct 20 2007;25(30):4722-9. [Medline].
Wisoff JH, Boyett JM, Berger MS, et al. Current neurosurgical management and the impact of the extent of resection in the treatment of malignant gliomas of childhood: a report of the Children's Cancer Group trial no. CCG-945. J Neurosurg. Jul 1998;89(1):52-9. [Medline].

