Peer-reviewed article
Candidate Stress-Specific microRNA Expression in Pediatric Thrombosis and Healthy Children: A Comparative Analysis of Serum miR-34a-5p in Relation to Stress Levels and Inflammatory Genetic Traits.
Gintoni I, Damaskopoulou E, Siouti Z, Baldouni K, Skoufou M et al. ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This is a laboratory study examining the relationship between a specific microRNA molecule (miR-34a-5p) and blood clotting disorders in children. The researchers compared gene expression patterns in children with thrombosis and healthy children to understand how stress and inflammation might be linked to clotting problems. The study is primarily a molecular biology investigation rather than an assessment of child well-being or health outcomes.
Key points
- miR-34a-5p was identified as a stress-specific microRNA with 80.6% coverage of adversity-related genes
- Expression of miR-34a-5p was significantly reduced in children carrying the T allele of the IL1B gene polymorphism
- Subjectively perceived stress levels did not significantly influence miR-34a-5p expression
- The T allele is associated with increased levels of the prothrombotic cytokine IL-1β
- The authors propose miR-34a-5p as a potential biomarker for stress-associated inflammation in childhood
Limitations
This is a basic science study focused on molecular mechanisms and biomarkers rather than evaluating interventions or measuring actual child health outcomes, well-being, or functionality. The document does not provide information about the clinical benefits for children or test any health promotion intervention.
Abstract
Background Pediatric thrombosis (PT) is a rare clinical entity manifesting from neonatal life to adolescence with possibly severe clinical complications and increasing prevalence in the last decade. Its pathogenesis has been attributed to a multitude of factors, all of which share stress and inflammation as a common denominator. Although stress-induced inflammation, marked by the upregulation of proinflammatory interleukins, such as IL-1β, creates a prothrombotic environment, its relation with thrombosis remains incompletely defined, especially in the context of PT, which differs substantially from adult thrombosis. Here, we aimed to epigenetically explore the potential link between PT and stress-induced inflammation through a combinatorial approach. Methods Initially, we bioinformatically identified candidate stress-specific miRNAs in childhood, followed by subsequent experimental assessment in serum samples of PT patients and healthy controls in relation to subjectively perceived stress levels and the functional +3953C/T genetic polymorphism of the IL1B gene, which affects the circulating levels of the proinflammatory and stress-induced interleukin 1beta (IL-1β). Results The bioinformatic analysis identified miR-34a-5p as the most stress-specific candidate microRNA in childhood, exhibiting the highest gene-target coverage (80.6%) of the developed panel of adversity-related genes, but is also known to regulate IL1B expression. The expression of serum miR-34a-5p was not significantly influenced by subjectively perceived stress; however, its expression was significantly reduced in the presence of the T allele of the functional +3953C/T polymorphism of its target gene, IL1B, associated with increased levels of the stress-induced proinflammatory and simultaneously prothrombotic IL-1β cytokine (FC:0.57; p = 0.024). Conclusions The observed downregulation of miR-34a-5p in the presence of the IL-1β-increasing T allele possibly indicates a dynamic regulatory relationship, which, alongside its previously established long-term downregulation in PT, renders miR-34a-5p a promising candidate molecule for bridging the biological processes of stress-associated inflammation and thrombosis. In addition, its bioinformatically yielded candidate stress-specific role holds great potential for the non-invasive evaluation of adversity-related stress in childhood.