2. Academic Validation
  3. Rac1 plays a crucial role in MCP-1-induced monocyte adhesion and migration

Rac1 plays a crucial role in MCP-1-induced monocyte adhesion and migration

  • Cell Immunol. 2024 Jun 17:401-402:104843. doi: 10.1016/j.cellimm.2024.104843.
Chandreyee Datta 1,  Pradip Das 1,  Surbhi Swaroop 1,  Ashish Bhattacharjee 2
Affiliations

Affiliations

  • 1 Department of Biotechnology, National Institute of Technology, Durgapur, Mahatma Gandhi Avenue, Durgapur-713209, Burdwan, West Bengal, India.
  • 2 Department of Biotechnology, National Institute of Technology, Durgapur, Mahatma Gandhi Avenue, Durgapur-713209, Burdwan, West Bengal, India. Electronic address: abhattacharjee.bt@nitdgp.ac.in.
PMID: 38905771 DOI: 10.1016/j.cellimm.2024.104843
Abstract

Monocyte migration is an important process in inflammation and atherogenesis. Identification of the key signalling pathways that regulate monocyte migration can provide prospective targets for prophylactic treatments in inflammatory diseases. Previous research showed that the focal adhesion kinase Pyk2, Src kinase and MAP kinases play an important role in MCP-1-induced monocyte migration. In this study, we demonstrate that MCP-1 induces iPLA2 activity, which is regulated by PKCβ and affects downstream activation of Rac1 and Pyk2. Rac1 interacts directly with iPLA2 and Pyk2, and plays a crucial role in MCP-1-mediated monocyte migration by modulating downstream Pyk2 and p38 MAPK activation. Furthermore, Rac1 is necessary for cell spreading and F-actin polymerization during monocyte adhesion to fibronectin. Finally, we provide evidence that Rac1 controls the secretion of inflammatory mediator vimentin from MCP-1-stimulated monocytes. Altogether, this study demonstrates that the PKCβ/iPLA2/Rac1/Pyk2/p38 MAPK signalling cascade is essential for MCP-1-induced monocyte adhesion and migration.

Keywords

Chemotaxis; F-actin polymerization; MCP-1; Monocyte adhesion; Primary human monocyte; Rac1.

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