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Endothelial cellular response to altered shear stress.
A B Fisher1, S Chien, A I Barakat
1Institute for Environmental Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-6068, USA. abf@mail.med.upenn.edu
Summary
Endothelial cells sense and respond to blood flow shear stress through various mechanosensors. Changes in shear stress trigger signaling pathways, impacting cell function and disease development.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Physiology
Background:
- Endothelial cells are constantly exposed to mechanical forces from blood flow.
- These forces significantly influence endothelial cell phenotype and function.
- Understanding these responses is crucial for cardiovascular health.
Purpose of the Study:
- To review recent findings on endothelial cell responses to shear stress.
- To identify proposed mechanosensors involved in shear stress detection.
- To discuss the relevance of these responses in pathophysiological conditions.
Main Methods:
- Review of recent symposium information on endothelial cell shear stress.
- Identification of proposed endothelial cell shear stress mechanosensors.
- Discussion of signaling cascades and cellular responses.
Main Results:
- Proposed mechanosensors include receptor kinases, integrins, ion channels, and the cytoskeleton.
- Shear stress sensing triggers signaling cascades involving reactive oxygen species and nitric oxide.
- Endothelial cells adapt to sustained shear stress; altered shear triggers signaling.
Conclusions:
- Endothelial cell shear stress mechanosensing is complex, involving multiple components.
- Altered shear stress is linked to signaling events relevant to hypertension and thrombosis.
- In vitro models must account for flow patterns and cell environment for accurate study.