Refractory anaplastic astrocytoma (WHO grade III) and Glioblastoma multiforme (WHO grade IV) are primary malignant brain tumours with poor prognosis and limited treatment options. Despite considerable genetic heterogeneity, these tumours often have impaired DNA repair systems, rendering them initially sensitive to alkylating agents, although they invariably develop resistance to these agents over time. Temozolomide is an imidazotetrazine prodrug that is stable at acidic pH but undergoes spontaneous nonenzymatic hydrolysis at neutral or slightly basic pH; these properties allow for both oral and intravenous administration. Following initial hydrolysis, further reactions liberate a highly reactive methyl diazonium cation capable of methylating various residues on adenosine and guanine bases leading to DNA lesions and eventual apoptosis. Temozomolide as an adjunct to radiotherapy followed by maintenance dosing remains the standard of care for both Glioblastoma and refractory anaplastic astrocytoma.
Temozolomide was granted FDA approval on August 11, 1999, as an oral capsule and subsequently on February 27, 2009, as an intravenous injection. It is currently marketed under the trademark TEMODAR® by Merck.
Temozolomide is indicated in adult patients for the treatment of newly diagnosed glioblastoma concomitantly with radiotherapy and for use as maintenance treatment thereafter. It is also indicated for the treatment of refractory anaplastic astrocytoma in adult patients or adjuvant therapy for adults with newly diagnosed anaplastic astrocytoma.
CHU Angers, Angers, France
Centre Oscar Lambret, Lille, France
Centre Léon Bérard, Lyon, France
Hospital Clinic, Barcelona, Spain
Hospital Clínico San Carlos, Madrid, Spain
Hospital Vall d'Hebron, Barcelona, Spain
University of California, San Francisco, San Francisco, California, United States
Children's Hospital Colorado, Aurora, Colorado, United States
University of Chicago, Chicago, Illinois, United States
Perth Children's Hospital, Perth, Western Australia, Australia
National Cancer Center Hospital, Chuo Ku, Tokyo, Japan
UZ Gent, Gent, Oost-Vlaanderen, Belgium
National Institutes of Health Clinical Center, Bethesda, Maryland, United States
Nationwide Children's Hospital, Columbus, Ohio, United States
Medical College of Wisconsin, Milwaukee, Wisconsin, United States
Washington University School of Medicine, Saint Louis, Missouri, United States
University of Iowa/Holden Comprehensive Cancer Center, Iowa City, Iowa, United States
M D Anderson Cancer Center, Houston, Texas, United States
Gosford Hospital, Gosford, New South Wales, Australia
Icon Cancer Centre, South Brisbane, Queensland, Australia
Princess Alexandra Hospital, Woolloongabba, Queensland, Australia
Henan Cancer Hospital, Zhengzhou, Henan, China
The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
The First Affiliated Hospital of Nanchang University Branch Donghu, Nanchang, Jiangxi, China
Stay informed with timely notifications on clinical trials, regulatory changes, and research advancements related to this medication.