IL-36γ has proinflammatory effects on human endothelial cells.

Area of Science:

• Immunology
• Dermatology
• Cell Biology

Background:

• Psoriatic skin inflammation involves epidermal Interleukin-36 (IL-36) upregulation.
• Dermal vascular alterations are key features of psoriatic lesions.
• The impact of IL-36 on endothelial cells remains largely uninvestigated.

Purpose of the Study:

• To investigate the effects of IL-36 cytokines on dermal endothelial cells.
• To explore the role of IL-36 in the vascular component of psoriatic inflammation.

Main Methods:

• Assessment of IL-36 receptor expression in endothelial cells.
• Stimulation of endothelial cells with IL-36γ and measurement of adhesion molecules (VCAM-1, ICAM-1).
• Analysis of chemokine secretion and T-cell chemotaxis assays.

Main Results:

• Endothelial cells express a functional IL-36 receptor.
• IL-36γ upregulates VCAM-1 and ICAM-1, promoting T-cell adhesion.
• IL-36γ-stimulated endothelial cells secrete pro-inflammatory chemokines (IL-8, CCL2, CCL20).
• Increased T-cell migration towards IL-36γ-stimulated endothelial cells was observed.

Conclusions:

• IL-36γ activates endothelial cells within the dermal vascular compartment.
• IL-36γ contributes to psoriatic skin inflammation by enhancing leukocyte recruitment via endothelial cell activation.