Spermidine reduces ISGylation and enhances ISG15-USP18 interaction.

ABSTRACT: The expression of ubiquitin-like molecule interferon-stimulated gene 15 kDa (ISG15) and its post-translational modification (ISGylation) are significantly activated by interferons or pathogen infections, highlighting their roles in innate immune responses. Over 1100 proteins have been identified as ISGylated. ISG15 is removed from substrates by interferon-induced ubiquitin-specific peptidase 18 (USP18) or severe acute respiratory syndrome coronavirus 2-derived papain-like protease. High ISGylation levels may help prevent the spread of coronavirus disease 2019 (COVID-19). Polyamines (spermidine and spermine) exhibit anti-inflammatory, antioxidant, and mitochondrial functions. However, the relationship between nutrients and ISGylation remains unclear. This study assessed the effects of sperm

SUBMITTER: Etori H 

PROVIDER: S-EPMC12102389 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature