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Hookipa Biotech Initiates First-in-Human Study

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News

Hookipa Biotech Initiates First-in-Human Study

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Hookipa Biotech AG has announced the start of a first-in-human study to evaluate the safety and immunogenicity of its vaccine candidate, HB-101, against human cytomegalovirus (HCMV). Part of the herpes family of viruses, HCMV is one of the most significant viral pathogens during pregnancy and in immunocompromised patients.

HB-101 is a bivalent vaccine containing two recombinant, replication-deficient lymphocytic
choriomeningitis virus (rLCMV) vectors, one expressing the pp65 protein and one a truncated gB
protein of cytomegalovirus. HB-101 is based on Hookipa’s viral vector platform, Vaxwave®, which can be applied repeatedly to boost the immune system and stimulate both potent B-cell and CD8+ T-cell immune responses.

The randomized, placebo-controlled Phase I study will recruit a total of 54 healthy, male and female subjects, negative for HCMV, at the Center for Vaccinology, Ghent University Hospital (CEVAC). Enrolled as three successive cohorts of 18 volunteers, each cohort will receive either a low dose, a middle dose or a high dose of the vaccine (n=14 volunteers), or placebo (n=4). The vaccine will be administered intra-muscularly at day 0, month 1 and month 3.

The trial will run for 15 months, with interim immunogenicity data expected in Q4 2016 and Q1 2017. The primary endpoint of the study is safety. Safety data from each cohort will be reviewed by an independent group of experts from the Data and Safety Monitoring Board (DSMB), before dosing of the next cohort begins. Secondary endpoints are humoral and cellular immune responses induced by the vaccine. The first cohort has already received the low dose. Enrolment of the second cohort will start shortly.

Jörn Aldag, CEO of Hookipa, said “Development of a CMV vaccine has been ranked at the highest priority by the US Institute of Medicine. Obtaining approval for the first-in-human study of our HB-101 vaccine, and the commencement of the clinical trial is an important milestone for Hookipa, and provides validation of our Vaxwave viral vector platform. The trial follows strong pre-clinical data for HB-101 and we are confident that this will be reflected in the outcome of the study. ”

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