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Evaluation of a Series of Lipidated Tucaresol Adjuvants in a Hepatitis C Virus Vaccine Model.

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Hepatitis C virus (HCV) infections represent a global health challenge; however, developing a vaccine for treatment of HCV infection has remained difficult as heterogeneous HCV contains distinct genotypes, and each… Click to show full abstract

Hepatitis C virus (HCV) infections represent a global health challenge; however, developing a vaccine for treatment of HCV infection has remained difficult as heterogeneous HCV contains distinct genotypes, and each genotype contains various subtypes and different envelope glycoproteins. Currently, there is no effective preventive vaccine for achieving global control over HCV. In our efforts to improve upon current HCV vaccines we designed a synthetically accessible adjuvant platform, wherein we synthesized 11 novel lipidated tucaresol analogues to assess their immunological potential. Using a tucaresol-based adjuvant approach, truncated lipid-variants together with an engineered E1E2 antigen construct, namely E2ΔTM3, elicited antibody (Ab) responses that were significantly higher than tucaresol. In sum, antibody end-point titer values largely corroborated HCV neutralization data with a simplified lipidated tucaresol variant affording the highest end point titer and % neutralization. This study lays the groundwork for additional permutations in tucaresol adjuvant design, including the examination of other proteins in vaccine development.

Keywords: evaluation series; hcv; series lipidated; hepatitis virus; vaccine; lipidated tucaresol

Journal Title: ACS medicinal chemistry letters
Year Published: 2020

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