Related Experiment Video
Updated: Aug 7, 2026

Protocol for Dengue Infections in Mosquitoes A. aegypti and Infection Phenotype Determination
Published on: July 4, 2007
Lyophilization enables thermostable formulation of dengue virus-derived defective interfering particles
Min-Hsuan Lin1, Pramila Maniam2, Bing Tang2
1Program of Infection and Inflammation, QIMR Berghofer Medical Research Institute, Herston, Queensland, 4006, Australia; Global Virus Network (GVN) Center of Excellence, Australian Infectious Disease Research Centre, Brisbane, St Lucia, Queensland, 4067, Australia; Centre for Tropical Health & Emerging Diseases, Herston, Queensland, 4006, Australia.
Abstract:
Defective interfering particles (DIPs), containing truncated defective viral genomes (DVGs), are natural byproducts of RNA virus replication with potent antiviral activity. We recently developed a virus-free, dengue virus (DENV)-based platform producing antiviral DIPs with DI290 DVG, termed DIP-DI290. In this study, we established a scalable purification and lyophilization workflow for creating thermostable DIP-DI290 formulations for long-term storage. DIP-DI290 particles were purified via tangential flow filtration and ceramic hydroxyapatite chromatography, then lyophilized and reconstituted for biological assessment. After three months of storage at -80 °C, 4 °C, or room temperature, reconstituted DIP-DI290 retained biological activity, significantly upregulating interferon-stimulated genes (ISGs) and suppressing DENV-2 replication. These findings demonstrate that lyophilization preserves DIP-DI290's antiviral efficacy across diverse storage conditions, supporting its development as a thermostable, field-deployable therapeutic platform for virus infections.
Related Concept Videos
Viral Recombination
Viral Mutations
Protein Denaturation
Physical Methods for Controlling Microbial Growth: Temperature
Bacterial Gastroenteritis
Hepatitis

