Fibrinogen's Effect on Heart Cell Function
Author Information
Author(s): Boyd John H, Chau Edmond H, Tokunanga Chiho, Bateman Ryon M, Haljan Greg, Davani Ehsan Y, Wang Yinjin, Walley Keith R
Primary Institution: University of British Columbia
Hypothesis
Does fibrinogen and its degradation products alter cardiomyocyte contractile function through interaction with ICAM-1?
Conclusion
The amino acid sequence 117–133 of the fibrinogen gamma chain decreases cardiomyocyte contractility by binding to ICAM-1.
Supporting Evidence
- Endotoxin administration decreased cardiac contractility and increased ICAM-1 and fibrinogen levels.
- Fibrinogen specifically binds to ICAM-1 on cardiomyocytes.
- Blocking ICAM-1 prevents fibrinogen from decreasing heart cell contractility.
Takeaway
Fibrinogen can make heart cells weaker by sticking to a specific part on their surface called ICAM-1.
Methodology
Rats were injected with endotoxin to model inflammation, and isolated cardiomyocytes were treated with TNF-alpha to study contractility changes.
Limitations
The study was conducted on rats, which may not fully represent human physiology.
Participant Demographics
Male Sprague-Dawley rats, 350 to 450 g in weight.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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