ArticleJournal of translational medicine2026
CircRNA profiles of extracellular vesicle-enriched fractions from ART suppressed pregnant women living with HIV identifies interactome networks key to inflammation and viral latency.
Article in Journal of translational medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundDespite virologic suppression with ART, pregnant people living with HIV (PLWH) experience a disparate risk of chronic non-AIDS-related morbidities (NAMs) during pregnancy compared to people without HIV infection including preterm labor and small for gestational age. Many studies postulate that NAMs reflect immunological dysfunction from underlying continuous inflammation. Extracellular vesicles (EV) are fundamental to both HIV immune pathogenesis and maternal-placental-fetal systemic intercellular networking. Circular RNAs (CircRNA) are enriched within EVs and are readily transmissible with disease-specific functional outcomes in recipient cell populations. However, there is limited research addressing the intersection of EV circRNA and HIV during pregnancy.
methodsSmall RNA (smRNA) cargo of EV-enriched fractions derived from the plasma of pregnant PLWH (n = 8) was compared to that of pregnant people living without HIV (PLWoH, n = 10) using low-input RNA sequencing (Illumina PE150). Differential circRNA profiles were used to construct circRNA-miRNA-gene regulatory maps and circRNA-protein interactions (circInteractome and miRTarbase). Gene set enrichment analysis (GSEA) using Reactome on the predicted genes from the interactome networks, provided insights into the regulatory roles of the differentially expressed circRNAs of EV-enriched fractions.
resultsDifferential expression analysis identified 27 significantly upregulated circRNAs of EV-enriched fractions for pregnant PLWH as compared to pregnant PLWoH. GSEA revealed physiological pathways influential to HIV reservoir establishment, latency, replication, immune activation, immunosenescence, as well as maternal-placental-fetal immune cross talk. FUS, AGO2, and EIF4A3 were the top circRNA binding proteins and are involved in scaffolding for circRNA biogenesis, EV sorting, and miRNA sponging. High-density miRNA-binding circRNAs of EV-enriched fractions highlighted circRNA-mediated suppression of HIV inhibitory mechanisms including extensive binding of hsa-miR-326 and hsa-miR-548c-3p.
conclusionsWhile many studies have compared plasma RNA profiles for PLWH compared to PLWoH, few have conducted this analysis for EVs, and we were unable to find a study specific to the unique combination of exploring RNA cargo of EV-enriched fractions in PLWH during pregnancy. This study aims to address the knowledge gap for NAMs in pregnancy by investigating EV-based intercellular communication. The results imply that novel EV circRNA-mediated regulatory mechanisms may contribute to HIV persistence, inflammation, and immune modulation in pregnancy.
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