Related Experiment Video
Updated: Jul 5, 2026
08:58
En Face Detection of Nitric Oxide and Superoxide in Endothelial Layer of Intact Arteries
Published on: February 25, 2016
Impaired endothelial function in C-reactive protein overexpressing mice
Hwee Teoh1, Adrian Quan, Fina Lovren
1Division of Cardiac Surgery, Keenan Research Centre, Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, ON, Canada.
Atherosclerosis
|April 25, 2008
Summary
Elevated C-reactive protein (CRP) causes endothelial dysfunction, impairing blood vessel health and promoting atherosclerosis. This study shows CRP overexpression in mice leads to reduced nitric oxide and increased vascular inflammation.
Area of Science:
- Cardiovascular Biology
- Inflammation Research
- Vascular Medicine
Background:
- C-reactive protein (CRP) is an inflammatory biomarker linked to atherothrombosis.
- Endothelial dysfunction is a key early event in atherosclerosis.
Purpose of the Study:
- To investigate the role of CRP in endothelial homeostasis and function.
- To determine if CRP overexpression impairs endothelial function in vivo.
Main Methods:
- Utilized CRP transgenic (CRPtg) mice and wild-type mice.
- Induced CRP overexpression using turpentine injection.
- Assessed endothelial-dependent responses in aortic segments via acetylcholine stimulation.
- Measured nitric oxide (NO) release and eNOS protein expression.
- Analyzed perivascular fibrosis and inflammatory markers (VCAM-1, MCP-1) via histology and staining.
Main Results:
- CRPtg mice with induced CRP overexpression showed impaired endothelium-dependent vasodilation compared to controls.
- Nitric oxide release and phosphorylated eNOS levels were significantly reduced in CRP-overexpressing aortas.
- Increased perivascular fibrosis, VCAM-1, MCP-1 expression, and macrophage infiltration were observed in CRP-overexpressing mice.
- Serum human CRP levels reached 276.28 +/- 95.7 microg/ml in turpentine-treated CRPtg mice.
Conclusions:
- CRP overexpression leads to endothelial dysfunction in mice.
- Reduced NO bioavailability is a likely mechanism underlying CRP-induced endothelial dysfunction.
- CRP contributes to vascular structural changes and inflammation, supporting its role in atherothrombosis.
