Related Experiment Videos
Regulation of the tissue factor gene
1Department of Immunology, Scripps Research Institute, La Jolla, CA 92037, USA. nmackman@scripps.edu
Thrombosis and Haemostasis
|July 1, 1997
Summary
Tissue factor (TF) initiates blood coagulation. Cell-specific regulatory pathways, involving transcription factors like Sp1 and AP-1, control TF gene expression in various cell types.
Area of Science:
- Molecular Biology
- Cell Biology
- Hematology
Background:
- Tissue factor (TF) is a key cellular receptor initiating the blood coagulation cascade.
- TF expression is tightly regulated, being constitutive in some cells and inducible in others, including monocytes and endothelial cells.
Purpose of the Study:
- To investigate the regulatory mechanisms controlling tissue factor (TF) gene expression.
- To identify cell type-specific pathways that modulate TF promoter activity.
Main Methods:
- Analysis of TF gene promoter regions in human, murine, and rat models.
- Identification and characterization of transcription factor binding sites (AP-1, NF-kappa B, Egr-1, Sp1) within TF enhancers.
- Functional studies to assess promoter induction in different cell types.
Main Results:
- Sp1 transcription factor regulates basal TF gene expression.
- A distal enhancer with AP-1 and NF-kappa B sites mediates TF induction in monocytic and endothelial cells.
- Proximal enhancers with Egr-1 and Sp1 sites drive TF induction in epithelial-like cells and vascular smooth muscle cells.
Conclusions:
- TF gene expression is regulated by distinct, cell type-specific enhancer elements and transcription factors.
- Understanding these pathways is crucial for controlling coagulation and related diseases.