TIMP-1 Promotes Expression of MCP-1 and Macrophage Migration by Inducing Fli-1 in Experimental Liver Fibrosis

Quick Facts

  • Publication title: TIMP-1 Promotes Expression of MCP-1 and Macrophage Migration by Inducing Fli-1 in Experimental Liver Fibrosis
  • Journal: J CLIN TRANSL HEPATO
  • Year: 2024
  • DOI: 10.14218/JCTH.2023.00514
  • PMID/PMCID: 38993513; PMC11233975

Research overview

This study aimed to explore the pathways through which TIMP-1 controls monocyte chemoattractant protein-1 (MCP-1) expression and promotes hepatic macrophage recruitment. This study aimed to explore the pathways through which TIMP-1 controls monocyte chemoattractant protein-1 (MCP-1) expression and promotes hepatic macrophage recruitment.

Key findings

siRNA-TIMP-1 alleviated carbon tetrachloride-induced liver fibrosis, reducing macrophage migration and MCP-1 expression.

Co-culturing macrophages with hepatic stellate cells (HSCs) post-TIMP-1 downregulation inhibited macrophage migration.

In siRNA-TIMP-1-treated HSCs, microRNA-145 (miRNA-145) expression increased, while the expression of Friend leukemia virus integration-1 (Fli-1) and MCP-1 was inhibited.

Downregulation of Fli-1 led to decreased MCP-1 expression, whereas Fli-1 overexpression increased MCP-1 expression within HSCs.

Study design

Liver fibrosis was triggered through carbon tetrachloride, and an adeno-associated virus containing small interfering RNA targeting TIMP-1 (siRNA-TIMP-1) was administered to both rats and mice.

We assessed the extent of fibrosis and macrophage recruitment.

The molecular mechanisms regulating macrophage recruitment by TIMP-1 were investigated through transwell migration assays, luciferase reporter assays, the use of pharmacological modulators, and an analysis of extracellular vesicles (EVs).

Echo Biotech Role

Echo Biotech contributed EV isolation and purification, EV characterization, miRNA profiling/sequencing and bioinformatic analysis.

Related platforms: Exoomics®

Related services and capabilities: EV Isolation & Purification, EV Basic Characterization (TEM/NTA/WB), EV miRNA Profiling / Sequencing

References

Original publication: TIMP-1 Promotes Expression of MCP-1 and Macrophage Migration by Inducing Fli-1 in Experimental Liver Fibrosis Journal of clinical and translational hepatology. 2024. DOI: 10.14218/JCTH.2023.00514. PMID/PMCID: 38993513; PMC11233975.