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Immune triad microenvironments define coordinated activation architecture in psoriatic disease
1Institute of Infection, Immunity and Inflammation, University of Glasgow, G12 8TA, UK; Institute of Developmental & Regenerative Medicine, University of Oxford, OX3 7TY, UK.
International Immunopharmacology
|February 9, 2026
Summary
Immune cell triads, like dendritic cell-T cell-natural killer cell combinations, are key to understanding psoriatic inflammation organization. These cellular groupings show coordinated activation within skin lesions, linking tissue immunity to disease severity.
Area of Science:
- Immunology
- Dermatology
- Systems Biology
Background:
- Psoriatic inflammation involves diverse leukocyte lineages with poorly understood cooperative patterns.
- Immune triads, defined as three interacting cell types in a shared microenvironment, offer a framework to study immune organization in psoriasis.
Purpose of the Study:
- To investigate the spatial organization and activation patterns of immune triads in psoriatic inflammation.
- To determine if specific immune triads correlate with disease characteristics and tissue localization.
Main Methods:
- Integration of peripheral CITE-seq profiling with spatial transcriptomics from psoriatic skin lesions.
- Identification and characterization of immune triad niches and their activation states within different tissue layers.
Main Results:
- A significant systemic activation synchrony was observed within dendritic cell-T cell-natural killer cell (DC-T-NK) triads.
- All investigated triads were consistently enriched in psoriatic lesions, predominantly within epidermal regions.
- Coordinated activation was evident in DC-T-NK and monocyte-MAIT-neutrophil triads within the epidermis, with MAIT-containing triads showing severity-linked signals.
Conclusions:
- Immune triads provide a unifying model for understanding coordinated cellular activation in psoriatic skin.
- The spatial positioning and activation profiles of immune triads are linked to clinically relevant features of psoriatic inflammation.
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