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Efficacy of intracerebral delivery of Carboplatin in combination with photon irradiation for treatment of F98 glioma-bearing rats.: Efficacy of radiotherapy combined with prolonged i.c. delivery of carboplatin against F98 rat-glioma

Julia Rousseau 1 Rolf Barth 2 Melvin Moeschberger 2 Hélène Elleaume 1, *
* Corresponding author
1 INSERM U836, équipe 6, Rayonnement synchrotron et recherche médicale
ESRF - European Synchrotron Radiation Facility, GIN - Grenoble Institut des Neurosciences
Abstract : PURPOSE: To evaluate the efficacy of prolonged intracerebral (i.c.) administration of carboplatin by means of ALZET osmotic pumps, in combination with radiotherapy for the treatment of intracranial F98 glioma in rats. METHODS AND MATERIALS: Seven days after stereotactic implantation of F98 glioma cells into the brains of Fischer rats, carboplatin was administrated i.c. by means of ALZET pumps over 6 days. Rats were treated at the European Synchrotron Radiation Facility with a single 15-Gy X-ray dose, either given alone or 24 h after administration of carboplatin. RESULTS: Untreated rats had a mean survival time (MST) +/- SE of 23 +/- 1 days, compared with 44 +/- 3 days for X-irradiated animals and 69 +/- 20 days for rats that received carboplatin alone, with 3 of 13 of these surviving >195 days. Rats that received carboplatin followed by X-irradiation had a MST of >142 +/- 21 days and a median survival time of >195 days, with 6 of 11 rats (55%) still alive at the end of the study. The corresponding percentage increases in lifespan, based on median survival times, were 25%, 85%, and 713%, respectively, for carboplatin alone, radiotherapy alone, or the combination. CONCLUSIONS: Our data demonstrate that i.c. infusion of carboplatin by means of ALZET pumps in combination with X-irradiation is highly effective for the treatment of the F98 glioma. They provide strong support for the approach of concomitantly administering chemo- and radiotherapy for the treatment of brain tumors.
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Julia Rousseau, Rolf Barth, Melvin Moeschberger, Hélène Elleaume. Efficacy of intracerebral delivery of Carboplatin in combination with photon irradiation for treatment of F98 glioma-bearing rats.: Efficacy of radiotherapy combined with prolonged i.c. delivery of carboplatin against F98 rat-glioma. International Journal of Radiation Oncology - Biology - Physics, Elsevier, 2009, 73 (2), pp.530-6. ⟨10.1016/j.ijrobp.2008.09.018⟩. ⟨inserm-00410447⟩

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