MCP-1 exerts the inflammatory response via ILK activation during endometriosis pathogenesis

Area of Science:

• Reproductive biology
• Immunology
• Cell biology

Background:

• Monocyte chemoattractant protein-1 (MCP-1) is elevated in endometriosis.
• Integrin-linked kinase (ILK) interacts with MCP-1 signaling pathways.
• ILK plays a role in various cellular functions relevant to endometriosis progression.

Purpose of the Study:

• To investigate the role of MCP-1-ILK signaling in endometriotic cell behavior (adhesion, invasion, colonization).
• To evaluate the impact of MCP-1-ILK signaling on macrophage differentiation and inflammation in an endometriosis mouse model.

Main Methods:

• Developed a mouse model of endometriosis by injecting MCP-1.
• Examined endometriotic cell (Hs832(C).TCs) migration, adhesion, colonization, and invasion in response to MCP-1-ILK signaling.
• Assessed THP-1 cell differentiation into macrophages under MCP-1-ILK signaling influence.

Main Results:

• MCP-1 enhanced ILK phosphorylation in endometriotic cells, promoting their migration, adhesion, colonization, and invasion.
• In the endometriosis model, MCP-1-ILK activation increased pro-inflammatory chemokines and macrophage infiltration while suppressing anti-inflammatory responses.
• ILK inhibition (CPD22) reversed these effects, restoring cell phenotypes and promoting anti-inflammatory responses, including T-cell restoration.

Conclusions:

• Targeting ILK normalizes the peritoneal MCP-1 environment in endometriosis.
• ILK inhibition reduces endometriotic cell invasiveness and the inflammatory response.
• This strategy improves T-regulatory and T-helper cell function in endometriosis models.