Clinical Report: Understanding Mechanisms Influencing Dengue Severity

Overview

This systematic review identifies key mechanisms influencing severe dengue, particularly focusing on NS1-mediated endothelial injury, glycocalyx disruption, and myeloid activation.

Background

Dengue virus (DENV) poses a significant global health burden, infecting approximately 400 million individuals annually and leading to severe outcomes, particularly in vulnerable populations. Understanding the transition from mild to severe dengue is crucial. This review addresses the mechanistic gaps in current dengue research, aiming to clarify the pathways leading to severe vascular immunopathology.

Data Highlights

No quantitative pooling was possible due to sparse CI-bearing estimates and insufficiently harmonized outcome definitions.

Key Findings

• Three mechanism families reached C1 conditional evidence: NS1-linked vascular permeability, endothelial glycocalyx/barrier disruption, and myeloid effector activation.
• Two null randomized trials showed no significant impact of rupatadine on plasma leakage and oseltamivir on time to defervescence.
• The agent-based model demonstrated that the NS1–barrier–myeloid set could generate a connected endothelial-barrier failure analog under specific conditions.
• Upstream viral/NS1 pressure and myeloid collateral cost were critical in maintaining barrier integrity.
• Claim escalation requires longitudinal cohorts and functional perturbation assays to validate findings.

Clinical Implications

The findings suggest that monitoring NS1 levels and myeloid effector markers may be essential in predicting severe dengue outcomes. Understanding the interplay between these mechanisms can inform targeted therapeutic strategies.

Conclusion

This review provides a foundational understanding of the mechanisms underlying severe dengue, highlighting the need for further research to validate these findings in clinical settings.

Related Resources & Content

1. International Journal of Infectious Diseases, 2026 -- Global performance of predictive models for dengue severity, hospitalization and mortality: a systematic review and meta-analysis of 146 studies
2. The Journal of Infectious Diseases, 2026 -- Comparison of Predictive Models for Severe Dengue: Logistic Regression, Classification Tree, and the Structural Equation Model
3. Open Forum Infectious Diseases, 2026 -- Variability in Clinical Severity and Outcomes Among Patients With Dengue Presenting Warning Signs in an Endemic Region of Latin America
4. Executive summary - WHO guidelines for clinical management of arboviral diseases, NCBI Bookshelf, 2026
5. Daily Mosnodenvir as Dengue Prophylaxis in a Controlled Human Infection Model, New England Journal of Medicine, 2026
6. Open Forum Infectious Diseases — Summary of a Collaborative Research Framework for Arboviruses Transmitted by Mosquitoes
7. Dengue - PubMed
8. Executive summary - WHO guidelines for clinical management of arboviral diseases - NCBI Bookshelf
9. Daily Mosnodenvir as Dengue Prophylaxis in a Controlled Human Infection Model | New England Journal of Medicine