Analyzing IL-2-induced vascular leakage with an irAOP as tool.

Area of Science:

• Toxicology
• Immunology
• Pharmacology

Background:

• Immune-related adverse outcome pathways (irAOPs) are crucial for understanding complex immunological mechanisms in toxicology.
• Interleukin-2 (IL-2) immunotherapy, while promising for cancer and autoimmune diseases, can cause severe vascular leakage (VL), a potentially fatal side effect.
• Systemic capillary leakage syndrome, associated with IL-2 therapy, has high mortality and is often under-diagnosed due to non-specific symptoms.

Purpose of the Study:

• To develop an irAOP specifically for IL-2-mediated vascular leakage (VL) using IL-2 immunotherapy as a use case.
• To structure existing knowledge on VL from an immunological perspective in the context of high-dose IL-2 immunotherapy.
• To identify knowledge gaps and potential biomarkers for IL-2-mediated VL.

Main Methods:

• A comprehensive literature review was conducted to consolidate information on VL pathophysiology.
• An irAOP was constructed based on immunological mechanisms underlying IL-2-mediated VL.
• The developed irAOP was used to identify gaps in current understanding and potential areas for biomarker discovery.

Main Results:

• The study successfully structured knowledge regarding the development of VL from an immunological viewpoint.
• An irAOP for IL-2-mediated VL was generated, highlighting areas for further investigation.
• The theoretical framework facilitates the identification of specific scientific questions for experimental validation.

Conclusions:

• The developed irAOP provides a foundation for experimental research into IL-2-mediated VL.
• Integrating new experimental data into the irAOP can refine the model and uncover novel insights.
• This approach can improve safety assessment for IL-2-based immunotherapies and aid in understanding, preventing, or predicting VL in various clinical contexts.