Inhibition of Hepatitis C Virus Replication by Intracellular Delivery of Multiple SiRNAs by Nanosomes
Overview
Pharmacology
Authors
Affiliations
Sustained antiviral responses of chronic hepatitis C virus (HCV) infection have improved recently by the use of direct-acting antiviral agents along with interferon (IFN)-α and ribavirin. However, the emergence of drug-resistant variants is expected to be a major problem. We describe here a novel combinatorial small interfering RNA (siRNA) nanosome-based antiviral approach to clear HCV infection. Multiple siRNAs targeted to the highly conserved 5'-untranslated region (UTR) of the HCV genome were synthesized and encapsulated into lipid nanoparticles called nanosomes. We show that siRNA can be repeatedly delivered to 100% of cells in culture using nanosomes without toxicity. Six siRNAs dramatically reduced HCV replication in both the replicon and infectious cell culture model. Repeated treatments with two siRNAs were better than a single siRNA treatment in minimizing the development of an escape mutant, resulting in rapid inhibition of viral replication. Systemic administration of combinatorial siRNA-nanosomes is well tolerated in BALB/c mice without liver injury or histological toxicity. As a proof-of-principle, we showed that systemic injections of siRNA nanosomes significantly reduced HCV replication in a liver tumor-xenotransplant mouse model of HCV. Our results indicate that systemic delivery of combinatorial siRNA nanosomes can be used to minimize the development of escape mutants and inhibition of HCV infection.
Motamedi H, Mahdizade Ari M, Alvandi A, Abiri R Front Microbiol. 2024; 15:1393646.
PMID: 38939184 PMC: 11208694. DOI: 10.3389/fmicb.2024.1393646.
Nanotechnology Platform for Advancing Vaccine Development against the COVID-19 Virus.
Chowdhury N, Kundu A Diseases. 2023; 11(4).
PMID: 38131983 PMC: 10742622. DOI: 10.3390/diseases11040177.
Developing New Tools to Fight Human Pathogens: A Journey through the Advances in RNA Technologies.
Costa V, Costa S, Saramago M, Cunha M, Arraiano C, Viegas S Microorganisms. 2022; 10(11).
PMID: 36422373 PMC: 9697208. DOI: 10.3390/microorganisms10112303.
Hussein M, Andrade Dos Ramos Z, Berkhout B, Herrera-Carrillo E Viruses. 2022; 14(2).
PMID: 35215977 PMC: 8880226. DOI: 10.3390/v14020385.
Challagulla A, Tizard M, Doran T, Cahill D, Jenkins K Methods Protoc. 2022; 5(1).
PMID: 35200534 PMC: 8879667. DOI: 10.3390/mps5010018.