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Eligibility
for people ages 18–75
Location
at San Francisco, California and other locations
Dates
study started
estimated completion:
Principal Investigator

Description

Summary

This is a multicenter, randomized, open-label phase 2/3 study of Toca 511 and Toca FC versus standard of care that comprises Investigator's choice of single agent chemotherapy (lomustine or temozolomide) or bevacizumab administered to subjects undergoing resection for first or second recurrence (including this recurrence) of GBM or AA. Subjects meeting all of the inclusion and none of the exclusion criteria will be randomized prior to surgery in a 1:1 ratio to receive either Toca 511 and Toca FC (Experimental arm, Arm T) or control treatment with one option of standard of care (Arm SOC). Due to the prognostic influence of molecular subgroups such as isocitrate dehydrogenase mutation, the trial will be stratified based on this determination from the primary pathology or subsequent biopsy known locally or otherwise determined centrally. A second stratification factor is based on the patient's Karnofsky Performance Score (KPS) (70-80 vs 90-100). Further, to account for potential differences in treatment choices for the control arm in regions, the trial will be stratified by geographical region during the randomization process. The study will be conducted in 2 parts; enrollment in the phase 3 will begin after phase 2 results are available.

Official Title

A Phase 2/3 Randomized, Open-Label Study of Toca 511, a Retroviral Replicating Vector, Combined With Toca FC Versus Standard of Care in Subjects Undergoing Planned Resection for Recurrent Glioblastoma or Anaplastic Astrocytoma

Keywords

Glioblastoma Multiforme Anaplastic Astrocytoma Recurrence Bevacizumab Temozolomide Dacarbazine Lomustine Flucytosine

Eligibility

You can join if…

Open to people ages 18–75

  1. Subject has given written informed consent
  2. Subject is between 18 years old and 75 years old, inclusive
  3. Subjects must have histologically proven GBM or AA in first or second recurrence(including this recurrence) or progression following initial definitive multimodal therapy with surgery, temozolomide (unless MGMT promoter unmethylated) and radiation(confirmed by diagnostic biopsy with local pathology review or contrast enhanced MRI). If first recurrence of GBM is documented by MRI, an interval of at least 12 weeks after the end of prior radiation therapy is required unless there is either: i)histopathologic confirmation of recurrent tumor, or ii) new enhancement on MRI outside of the radiotherapy treatment field
  4. Subjects must have measurable disease preoperatively, defined as at least 1 contrast enhancing lesion, measuring at least 1 cm in 2 planes (axial, coronal, or sagittal)
  5. Subjects must be at least 4 weeks post last dose of temozolomide
  6. Prior gamma knife, stereotactic radiosurgery, or other focal high-dose radiotherapy is allowed but the subject must have either histopathologic confirmation of recurrent tumor, or new enhancement on MRI outside of the radiotherapy treatment field
  7. Based on the pre operative evaluation by neurosurgeon, the subject is a candidate for≥ 80% resection of enhancing region
  8. IDH mutation status of the primary tumor must be available or tumor samples must be available for pre randomization testing
  9. Laboratory values adequate for patient to undergo surgery, including:

    • Platelet count ≥ 60,000/mm3
    • Hgb ≥ 10 g/dL
    • Absolute neutrophil count (ANC) ≥ 1,500/mm3
    • Absolute lymphocyte count (ALC) ≥ 500/mm3
    • Adequate liver function, including:
    • Total bilirubin ≤ 1.5 x ULN (unless has Gilbert's syndrome)
    • ALT ≤ 2.5 x ULN f. Estimated glomerular filtration rate of at least 50 mL/min by the Cockcroft Gault formula below:
  10. Women of childbearing potential (≥12 months of non-therapy-induced amenorrhea or surgically sterile) must have had a negative serum pregnancy test within the past 21 days and must use a birth control method in addition to barrier methods (condoms).
  11. Subject or subject's partner is willing to use condoms for 12 months after receiving Toca 511 or until there is no evidence of the virus in his/her blood, whichever is longer.
  12. The subject has a KPS ≥ 70
  13. The subject is willing and able to abide by the protocol

You CAN'T join if...

  1. History of more than 2 prior recurrences (including this recurrence) of GBM or AA
  2. History of other malignancy, unless the patient has been disease free for at least 5 years. Adequately treated basal cell carcinoma or squamous cell skin cancer is acceptable regardless of time, as well as localized prostate carcinoma or cervical carcinoma in situ after curative treatment
  3. Histological confirmed oligodendroglioma or mixed glioma
  4. Known 1p/19q co deletion
  5. A contrast enhancing brain tumor that is any of the following:

    • Multi focal (defined as 2 separate areas of contrast enhancement measuring at least 1 cm in 2 planes that are not contiguous on either fluid attenuated inversion recovery (FLAIR) or T2 sequences);
    • Associated with either diffuse subependymal or leptomeningeal dissemination; or

      5 cm in any dimension

  6. The subject has or had any active infection requiring antibiotic, antifungal or antiviral therapy within the past 4 weeks
  7. The subject has any bleeding diathesis, or must take anticoagulants, or antiplatelet agents, including nonsteroidal anti inflammatory drugs (NSAIDs), at the time of the scheduled resection that cannot be stopped for surgery
  8. The subject is HIV positive
  9. The subject has a history of allergy or intolerance to flucytosine
  10. The subject has a gastrointestinal disease that would prevent him or her from being able to swallow or absorb flucytosine
  11. The subject received cytotoxic chemotherapy within the past 4 weeks (6 weeks for nitrosoureas) of the planned surgery date
  12. The subject received any investigational treatment within the past 30 days or prior immunotherapy or antibody therapy within the past 45 days.
  13. The subject is breast feeding
  14. The subject intends to undergo treatment with the Gliadel® wafer at the time of this surgery or has received the Gliadel® wafer < 30 days from W1D1 (surgery)
  15. The subject has received bevacizumab for their disease unless in the context of primary therapy for newly diagnosed glioma
  16. For subjects planned to potentially receive bevacizumab, they have no evidence of uncontrolled hypertension (defined as a blood pressure of ≥ 150 mm Hg systolic and/or≥ 100 mm Hg diastolic on medication) or active GI perforation
  17. The subject has received systemic dexamethasone continuously at a dose> 8 mg/day for 8 weeks prior to the date of the screening assessment
  18. Severe pulmonary, cardiac or other systemic disease, specifically:

    • New York Heart Association> Grade 2 congestive heart failure within 6 months prior to study entry, unless asymptomatic and well controlled with medication
    • Uncontrolled or significant cardiovascular disease, clinically significant ventricular arrhythmia (such as ventricular tachycardia, ventricular fibrillation, or Torsades des pointes), clinically significant pulmonary disease(such as ≥ Grade 2 dyspnea, according to CTCAE 4.03)
    • Subjects who have any other disease, either metabolic or psychological, which as per Investigator assessment may affect the subject's compliance or place the subject at higher risk of potential treatment complications

Locations

  • Stanford University
    Stanford, California, 94305, United States
  • University of California, Los Angeles
    Los Angeles, California, 90095, United States
  • University of California, Irvine
    Irvine, California, 92868, United States
  • St. Joseph Hospital
    Orange, California, 92868, United States

Details

Status
in progress, not accepting new patients
Start Date
Completion Date
(estimated)
Sponsor
Tocagen Inc.
ID
NCT02414165
Phase
Phase 2/3
Lead Scientist
Nicholas Butowski
Study Type
Interventional
Last Updated
November 1, 2016