Study identifies long-chain fatty acids as potential broad-spectrum treatment against enteroviruses
Researchers have identified long-chain fatty acids (LCFAs) as a potential broad-spectrum antiviral strategy against enteroviruses, exploiting the viruses' own dependence on increased phospholipid synthesis during infection. Enteroviruses are among the most common human pathogens, yet no approved antiviral treatments exist, partly because experimental drugs rapidly generate resistant viral strains. This study is notable because viruses failed to develop resistance to the LCFA-based approach, suggesting a fundamentally different mechanism that could overcome a major obstacle in antiviral drug development.
A preprint study posted to bioRxiv reports that polyunsaturated long-chain fatty acids (LCFAs) can broadly inhibit enterovirus replication by exploiting a universal feature of enterovirus infection: a dramatic upregulation of phospholipid synthesis. Enteroviruses hijack host cell membranes to build replication organelles, and the researchers found that incorporating specific LCFAs into these membranes disrupts the structural requirements for viral replication machinery. Importantly, the antiviral effect correlated with the conformational shape of the fatty acid molecules rather than their degree of unsaturation or ability to induce lipid peroxidation. The team also showed that inhibiting neutral lipid synthesis redirected LCFAs toward membranes in infected cells, further boosting antiviral potency. The approach proved effective across diverse enterovirus strains and multiple cell types, including differentiated primary cells. Crucially, repeated attempts to generate drug-resistant viral mutants were unsuccessful, addressing one of the central challenges that has stalled previous antiviral development efforts. The findings position LCFA metabolism as a promising host-targeted antiviral strategy, though the work remains at the preclinical stage.
What's missing
As a preprint, this study has not yet undergone formal peer review. The research is entirely preclinical (cell-based); no animal model or human safety and efficacy data are presented. Key translational questions remain open, including how to deliver therapeutic LCFA concentrations to relevant tissues in vivo, and potential toxicity from disrupting host lipid metabolism.
What different sources said
- bioRxivCenter
Infection-specific long-chain fatty acid metabolism as a broad anti-enterovirus target
Related
Gut Bacteria Enzyme Found to Break Down Heat-Processed Food Compounds, Producing Novel Biogenic Amines
Researchers have discovered that an enzyme in common gut bacteria can degrade N-epsilon-carboxymethyllysine (CML), a compound formed during thermal food processing, producing previously unknown biogenic amines. The enzyme, ornithine decarboxylase SpeC from enterobacteria, acts on CML and related modified lysine derivatives through a low-level 'underground' catalytic activity. This finding suggests a previously unrecognized communication axis between thermally processed dietary compounds and gut microbial physiology, with potential implications for host health.
Full-Length Gene Sequencing Reveals Two Distinct Bacterial Communities in Black-Legged Ticks Expanding Into Canada
Researchers used Oxford Nanopore full-length 16S rRNA gene sequencing to characterize the microbiome of Ixodes scapularis black-legged ticks collected in Nova Scotia, Canada, distinguishing between tick-adapted bacteria and environmentally acquired bacteria. The study comes as I. scapularis — the primary vector of Lyme disease — is rapidly expanding northward into Canada due to climate change. The findings suggest that environmentally derived bacteria in tick microbiomes are not mere contamination, which has implications for how tick microbiome data is collected and interpreted across surveillance studies.
Study Identifies Metabolic Link Between Cell Envelope Stress and Biofilm Formation in Bacteria
Researchers have discovered that the metabolite acetyl-CoA directly inhibits enzymes that degrade the bacterial signaling molecule c-di-GMP, connecting cell envelope biosynthesis stress to biofilm formation in Pseudomonas aeruginosa. The study found that sub-inhibitory concentrations of antibiotics targeting early peptidoglycan biosynthesis — but not other antibiotic classes — elevate c-di-GMP levels by reducing phosphodiesterase activity, with acetyl-CoA competing for the enzyme active site. Because the relevant enzyme domain is broadly conserved across bacterial species, this checkpoint mechanism may be widespread and could have implications for understanding antibiotic-induced biofilm responses.