Ddel-08overall Safety and Efficacy in Subjects With Recurrent Hgg Treated Across 2 Tocagen Studies - Prognostic Factors Associated With Survival
Year: 2015
Type: article
Abstract: High grade glioma (HGG) remains resistant to standard therapies with survival ranging from 7.2-8.1 months. Two Phase 1 clinical studies using a retroviral replicating vector (RRV), Toca 511, in combination with oral Toca FC (extended-release 5-FC) are ongoing to evaluate intracranial delivery of Toca 511 in patients with recurrent HGG. Patients were treated either by administering Toca 511 via intratumoral injection by biopsy needle or convection-enhanced delivery (CED) (NCT01156584), or by injection into the resection cavity wall (NCT01470794). The total safety population included 82 patients. The safety profile was favorable with only 3.7% patients experiencing a treatment related SAE and 1 patient discontinuing treatment due to toxicity (rash). A total of 59 patients who were efficacy evaluable (received Toca 511 and at least one dose of Toca FC) and excluding patients with non-biopsy needle delivery had a mOS of 13.8 months (95% CI 10.8,16.9). Cox-regression was used to examine factors associated with survival outcome. Baseline factors included for univariate analysis were tumor grade (III vs IV), number of recurrences (≤2 vs >2), gender, age (≤55 vs >55), longest diameter of cancerous lesion (continuous), daily dose of Toca FC (≥170 mg/kg vs <170 mg/kg), extent of primary resection (gross-total vs subtotal), KPS (≤80 vs >80), time between Toca 511 and Toca FC (weeks), and respective study participation (NCT01156568 vs NCT01470794). Of these, tumor grade, number of recurrences, gender and lesion diameter were included for multivariate analysis based on a p value <0.2 in the univariate analysis. Based on the multivariate analysis, the only statistically significant positive prognostic factor was the category of number of recurrences. Excluding patients with >2 recurrences, the observed median overall survival (mOS) is 14 months (95% CI 11.15, 23.36), comparing favorably to historical benchmarks. 60% and 24.7% of patients were alive after 12 and 24 months, respectively.
Source: Neuro-Oncology
Institutions: John F. Kennedy Medical Center, University of California, Los Angeles, Cleveland Clinic, University of California San Diego, Moores Cancer Center, Henry Ford Health, City Of Hope National Medical Center, City of Hope, The Ohio State University Wexner Medical Center, Houston Methodist, Swedish Medical Center, Hackensack University Medical Center, University of California, San Francisco
Language: English
Subfield: Genetics
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2342298225