MicroRNA Dynamics in Parasitic Infections

MicroRNAs (miRNAs) are short, non-coding RNA molecules that fine-tune gene expression by promoting mRNA degradation or inhibiting translation. In parasitic infections, both host and parasite miRNAs orchestrate a complex molecular dialogue that shapes immune evasion, tissue repair and chronicity. Parasites secreting miRNAs within extracellular vesicles can modulate host signalling pathways—such as Wnt, Notch and cytokine networks—to suppress pro-inflammatory responses and promote a niche conducive to survival. Conversely, host cells adjust their own miRNA repertoire to counteract invasion, driving macrophage activation, epithelial barrier maintenance and adaptive immunity. Advances in high-throughput small RNA sequencing, transcriptomic profiling and bioinformatic prediction have revealed stage-specific miRNA signatures across life cycles of trematodes, nematodes and protozoa, uncovering conserved and species-specific regulators. The global significance of this work lies in its potential to deliver novel diagnostic biomarkers, vaccine targets and RNA-based therapeutics. Integrating data from diverse parasite models underscores the universality of miRNA-mediated host-pathogen crosstalk and paves the way for translational interventions in neglected tropical diseases.

Research from Nature Portfolio

Recent studies have mapped miRNA landscapes across developmental stages of key schistosome species. A comprehensive analysis of Schistosoma mekongi revealed distinct miRNA repertoires in eggs, cercariae, male and female adults. Unsupervised clustering showed stage-specific signatures, while gene ontology annotations implicated these miRNAs in reproductive development, tegument formation and metabolic regulation. Orthology comparisons with related schistosomes and nematodes highlighted evolutionary conservation and divergence of miRNA families, offering insights into parasite biology and potential molecular vulnerabilities for targeted control strategies.

MicroRNA Dynamics in Parasitic Infections publication trend

The graph below shows the total number of articles in microrna dynamics in parasitic infections across all publications each year (not limited to Nature Index journals).

Technical terms

MicroRNA (miRNA): Short (~22 nt) non-coding RNA that regulates gene expression post-transcriptionally by guiding RNA-induced silencing complexes to target mRNAs.

Extracellular vesicle: Membrane-bound particle released by cells or parasites, carrying proteins, lipids and RNAs, including miRNAs, to mediate intercellular communication.

Small RNA sequencing: High-throughput method to profile the full complement of small RNAs in a sample, enabling discovery of known and novel miRNAs and their expression dynamics.

Differential expression analysis: Computational comparison of RNA abundance between conditions or life stages to identify RNAs with statistically significant changes in expression.

Host-pathogen interaction: Molecular interplay between host cells and invading parasites, encompassing immune recognition, evasion mechanisms and regulatory RNA exchanges.

Transcriptomic profiling: Holistic assessment of RNA expression patterns within cells or tissues, often combining small RNA and messenger RNA data to infer regulatory networks.

References

1. A secreted helminth microRNA suppresses gastrointestinal cell differentiation required for innate immunity. Frontiers in Immunology (2025).
2. Identification of miRNA Associated with Trichomonas gallinae Resistance in Pigeon (Columba livia). International Journal of Molecular Sciences (2023).
3. Comprehensive analysis of miRNA profiling in Schistosoma mekongi across life cycle stages. Scientific Reports (2024).
4. Both host and parasite non-coding RNAs co-ordinate the regulation of macrophage gene expression to reduce pro-inflammatory immune responses and promote tissue repair pathways during infection with fasciola hepatica. RNA Biology (2024).