VBI Vaccines Announces Positive DSMB Review in Phase 1/2a Study of VBI-1901 in Recurrent Glioblastoma (GBM) Patients

• Independent Data and Safety Monitoring Board (DSMB) unanimously recommends continuation of study without modification
• Low-dose study arm: enrollment complete
• Intermediate-dose study arm: enrollment commenced

CAMBRIDGE, Mass., April 17, 2018 (GLOBE NEWSWIRE) -- VBI Vaccines Inc. (Nasdaq:VBIV) ("VBI"), a commercial-stage biopharmaceutical company developing next-generation infectious disease and immuno-oncology vaccines, today announced that, upon review of all safety data from the fully enrolled, low-dose patient cohort of the ongoing Phase 1/2a clinical study of VBI-1901 in recurrent Glioblastoma (GBM), the independent Data and Safety Monitoring Board (DSMB) unanimously recommended the continuation of the study without modification.

Following this recommendation, VBI has initiated enrollment in the intermediate-dose arm of the dose-escalation phase of this study.  Two additional, pre-specified DSMB reviews will occur after the completion of enrollment in the intermediate-dose study arm and the high-dose study arm, respectively.

"We are encouraged by the safety profile of this candidate so far and are excited to continue enrollment in the intermediate dose cohort of this Phase 1/2a study, our first clinical study in immuno-oncology," said Jeff Baxter, VBI's president and CEO. "In recurrent GBM, a devastating CMV-associated tumor, patients have few effective treatment options, and we believe that VBI-1901 has the potential to stimulate immune responses critical to boosting anti-tumor immunity."

About the Phase I/2a Study Design

VBI's two-part Phase 1/2a study is a multi-center, open-label, dose-escalation study of VBI-1901 in approximately 28 patients with recurrent GBM:

• Part A: Dose-escalation phase to define the safety, tolerability, and optimal dose level of VBI-1901 in recurrent GBM patients. This phase is expected to enroll up to 18 patients in three dose cohorts.
• Part B: A subsequent extension of the optimal dose level, as defined in the dose escalation phase. This phase is expected to enroll an expanded cohort of approximately 10 additional patients.

VBI-1901 is administered intradermally and is adjuvanted with granulocyte-macrophage colony-stimulating factor (GM-CSF), a potent adjuvant that mobilizes dendritic cell function. Patients in both phases of the study will receive vaccine every four weeks until tumor progression.

Additional information, including a detailed description of the study design, eligibility criteria, and investigator sites, is available at ClinicalTrials.gov using identifier NCT03382977.

About VBI-1901 and GBM

VBI-1901 is a novel immunotherapy developed using VBI's eVLP technology to target two highly immunogenic cytomegalovirus (CMV) antigens, gB and pp65. Scientific literature suggests CMV infection is prevalent in multiple solid tumors, and recent research has demonstrated that an anti-CMV dendritic cell vaccination regimen may extend overall survival in patients with GBM. Additionally, recent preclinical studies confirmed that VBI-1901 may be a potent, "off-the-shelf" therapeutic vaccine.

Glioblastoma is among the most common and aggressive malignant primary brain tumors in humans. In the U.S. alone, 12,000 new cases are diagnosed each year. The current standard of care for treating GBM is surgical resection, followed by radiation and chemotherapy. Even with aggressive treatment, GBM progresses rapidly and is exceptionally lethal, with median patient survival of less than 16 months.

To learn more about VBI-1901, visit: https://www.vbivaccines.com/gbm/

About VBI Vaccines Inc.

VBI Vaccines Inc. ("VBI") is a commercial-stage biopharmaceutical company developing a next generation of vaccines to address unmet needs in infectious disease and immuno-oncology. VBI's first marketed product is Sci-B-Vac®, a hepatitis B (HBV) vaccine that mimics all three viral surface antigens of the hepatitis B virus; Sci-B-Vac is approved for use in Israel and 14 other countries. VBI's eVLP Platform technology allows for the development of enveloped virus-like particle (eVLP) vaccines that closely mimic the target virus to elicit a potent immune response. VBI is advancing a pipeline of eVLP vaccines, with lead programs in cytomegalovirus (CMV) and glioblastoma (GBM). VBI is also advancing its LPVtm Thermostability Platform, a proprietary formulation and process that enables vaccines and biologics to preserve stability, potency, and safety. VBI is headquartered in Cambridge, MA with research operations in Ottawa, Canada and research and manufacturing facilities in Rehovot, Israel.

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