Type-1 inflammatory imprinting and programmed responsiveness to CD40L enhance Siglec-1-dependent HIV-1 trans-infection by dendritic cells

By
E. Grace Bothwell
Allison E. DePuyt
Colleen R. Zaccard
Renee. R. Anderko
Peter E. J. Shoucair
Holly A. Bilben
Tatiana M. Garcia-Bates
Abigail D. Gerberick
Simon C. Watkins
Nicolas Sluis-Cremer
Charles R. Rinaldo
Robbie B. Mailliard
June 4, 2026
0 min

Frontiers In Immunology

Overview

This study reveals that monocyte-derived dendritic cells (DC) matured under specific type-1 proinflammatory conditions exhibit enhanced capacity for HIV-1 trans-infection of CD4+ T cells. The findings highlight the role of Siglec-1 upregulation and CD40L-mediated responses in facilitating this process.

Background

Dendritic cells are pivotal in orchestrating immune responses, acting as a bridge between innate and adaptive immunity. Their ability to mediate HIV-1 trans-infection poses significant implications for viral dissemination and infection dynamics. Understanding the mechanisms behind this process is crucial for developing targeted interventions in HIV management.

Data Highlights

No numerical data or trial data presented in the article; qualitative observations include enhanced binding and morphological changes in DC.

Key Findings

['Monocyte-derived DC matured under type-1 inflammatory conditions show increased HIV-1 trans-infection capacity.', 'Prostaglandin E2 exposure reduces the trans-infection ability of DC.', 'Upregulation of Siglec-1 enhances HIV-1 binding on proinflammatory DC.', 'CD40L signaling induces morphological changes in DC and increases CCL20 chemokine release.', 'Environmental signals during DC maturation significantly influence their trans-infection capabilities.']

Clinical Implications

The findings suggest that manipulating the inflammatory environment during DC maturation could be a strategy to reduce HIV-1 trans-infection rates. Clinicians should consider the role of dendritic cells in HIV transmission dynamics when designing therapeutic interventions, potentially focusing on specific inflammatory mediators.

Conclusion

This study underscores the importance of understanding dendritic cell maturation in the context of HIV-1 trans-infection, which may inform future therapeutic strategies aimed at interrupting viral spread and enhancing immune responses.