Abstract
ABSTRACTIntroduction: Glioblastoma and anaplastic astrocytoma are two of the most aggressive and common glioma malignancies in adults. These high-grade gliomas (HGG) universally recur despite aggressive treatment modalities and have a median overall survival (mOS) of approximately 14 months from initial diagnosis. Upon recurrence, there is no standard of care and these patients have a dismal prognosis of around 9 months at time of recurrence.Areas covered: In this article, we assess the newly published phase I data of Toca 511 and Toca FC, a two-drug combination therapy for recurrent HGG (rHGG) tumors, for effectiveness and safety.Expert opinion: These early studies provide very encouraging results for Toca 511 and Toca FC in rHGG. This therapy had a response rate of 11.3% and a mOS of 11.9 months in 56 patients, an improvement compared to historical controls. Furthermore, all responders were complete responses after extended follow-up. The drug is well tolerated for most patients. Responders tended to be young and have high-performance scores prior to beginning therapy, but more studies are necessary to understand the patient profile that receives the most benefit. Randomized-controlled trials are warranted for Toca 511 and Toca FC to confirm drug efficacy.
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