Prevention of Respiratory Syncytial Virus Infection with Probiotic Lactic Acid Bacterium Lactobacillus Gasseri SBT2055

Overview

Journal Sci Rep

Specialty Science

Date 2019 Mar 20

PMID 30886158

Citations 60

Authors

Kei Eguchi

Naoki Fujitani

Hisako Nakagawa

Tadaaki Miyazaki

Affiliations

Soon will be listed here.

Abstract

Lactobacillus gasseri SBT2055 (LG2055) is a probiotic lactic acid bacterium with multifunctional effects, including the prevention of influenza A virus infection in mice, reduction of adipocyte size in mice, and increased lifespan in C. elegans. We investigated whether LG2055 exhibits antiviral activity against respiratory syncytial virus (RSV), a global pathogen for which a preventive strategy is required. Following oral administration of LG2055 in mice, the RSV titre in the lung was significantly decreased, while body weight was not decreased after virus infection. Additionally, the elevated expression of pro-inflammatory cytokines in the lung upon RSV infection decreased after LG2055 administration. Moreover, interferon and interferon stimulated genes were upregulated by LG2055 treatment. Comparative cellular proteomic analysis revealed that SWI2/SNF2-related CREB-binding protein activator protein (SRCAP) was a candidate for the antiviral activity of LG2055 against RSV. There was a positive correlation between the inhibition of RSV replication and the suppression of SRCAP expression and RSV replication was suppressed by SRCAP silencing. Since SRCAP is a scaffold protein to which viral non-structural proteins bind, the downregulation of SRCAP induced by LG2055 could provide new insights about the inhibition of RSV replication. In summary, our study demonstrated that LG2055 has prophylactic potential against RSV infection.

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