Increased Levels of Leukocyte-Derived MMP-9 in Patients with Stable Angina Pectoris
Author Information
Author(s): Jönsson Simon, Lundberg Anna, Kälvegren Hanna, Bergström Ida, Szymanowski Aleksander, Jonasson Lena
Primary Institution: Linköping University, Linköping, Sweden
Hypothesis
The gene expression or protein release of MMP-8, MMP-9, TIMP-1, and TIMP-2 is altered in patients with stable angina pectoris compared to healthy individuals.
Conclusion
Leukocyte-derived MMP-9 and TIMP-1 are significantly altered in patients with stable angina pectoris, indicating a potential clinical relevance despite normal plasma levels.
Supporting Evidence
- Neutrophils were the dominant source of MMP-8 and MMP-9.
- Upon IL-8 stimulation, neutrophil release of MMP-9 was higher in SA patients compared to controls.
- TIMP-2 levels were lower in patients compared to controls.
Takeaway
Doctors found that certain proteins in the blood of patients with chest pain are different from those in healthy people, which might help understand their heart problems better.
Methodology
Plasma MMP-9 was measured in 44 SA patients and 47 healthy controls, with gene expression assessed using real-time PCR.
Potential Biases
The control group was clinically healthy without chronic medication, which may not represent the general population.
Limitations
The study population was small, and the control group was not angiographically examined, which may limit the findings.
Participant Demographics
44 stable angina patients and 47 healthy controls, matched for age and sex.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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