Development of stable liquid formulations for adenovirus-based vaccines

Journal of Pharmaceutical Sciences
Robert K EvansD B Volkin

Abstract

We have evaluated the stability profiles of adenovirus type-5 (Ad5)-based vaccine formulations to identify liquid formulations that are stable during long-term storage at 4 degrees C. By identifying the major physiochemical inactivation pathway(s) during storage, formulations of Ad5 were designed with specific pharmaceutical excipients leading to greatly enhanced stability. For example, results indicate that Ad5 is stabilized by non-ionic surfactants and cryoprotectants as well as excipients known to inhibit free-radical oxidation. A non-ionic surfactant is necessary to prevent adsorption of adenovirus to glass surfaces during storage, and a cryoprotectant is needed to prevent freeze-thaw-induced virus inactivation. In a base formulation (A105) containing sucrose as the cryoprotectant and polysorbate-80 as the non-ionic surfactant, metal-ion catalyzed free-radical oxidation is an important mechanism of Ad5 inactivation. The free-radical oxidation inhibitors ethanol and histidine, combined with the metal-ion chelator ethylenediaminetetraacetic acid (EDTA), were determined to be effective stabilizers of Ad5. Arrhenius plots of stability data are consistent with a first-order inactivation mechanism with apparent activation energie...Continue Reading

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Citations

Mar 9, 2011·The Journal of Biological Chemistry·Brandi M ChongJames L McManaman
Mar 12, 2005·Human Gene Therapy·Julie L BoyerRonald G Crystal
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