Differences of Serum Ratio MMP-9/TIMP-1 in ST-Elevation Myocardial Infarction (STEMI) and Non ST-Elevation Acute Coronary Syndrome (NSTEACS)


Background: Differences between the pathogenesis of ST-Elevation Myocardial
infarction (STEMI) and Non-ST Elevation Acute Coronary Syndrome
(NSTE-ACS) had yet unknown. Matrix metalloproteinase-9 (MMP-9) as the
matrix degradation enzyme secreted by inflammatory cells play a role in the
pathogenesis of plaque rupture. MMP-9 proteolytic activity is inhibited by
specific inhibitors of the Tissue Inhibitor of metalloproteinase-1 (TIMP-1).
MMP-9/TIMP-1 ratio describes the actual proteolytic activity of MMP-9.
This ratio may distinguish the pathogenesis of STEMI and NSTE-ACS.
Objective: To examine the difference serum level ratio MMP-9/TIMP-1 in
patients with STEMI and NSTE-ACS.
Methods and subjects: This is a cross-sectional study which recruits patients
consecutively with ACS admitted to ICCU of Dr. Sardjito General Hospital Yogyakarta
within 24 h onset. Acute infection, chronic inflammation, acute stroke,
kidney failure requiring renal replacement therapy, chronic heart failure, liver cirrhosis,
acute exacerbation of COPD and pneumonia, thromboembolic disease,
malignancy, pregnancy and the use of steroids and steroid anti-inflammatory
drugs are excluded. Serum levels of MMP-9 and TIMP-1 examined using the
method of sandwich enzyme-linked immunosorbent assay (ELISA).
Results: The total of 60 subjects with STEMI patients 31 (51.7%) and NSTEACS
29 (48.3%). Level of serum MMP-9/TIMP-1 ratio is significantly higher in
STEMI compared to NSTE-ACS (1.106 ± 0.065 vs. 1.046 ± 0.057, p <0.001).
MMP-9/TIMP-1 ratio in serum is an independent factor for STEMI (p = 0.003)
followed by blood sugar level (p = 0.013) and MMP-9 (p = 0.033). Interestingly,
patients with serum MMP-9/TIMP-1 ratio> 1.0639 has a prevalence risk
of 1.7 times having STEMI (p = 0.039; KI95% from 1.040 to 8.508). Levels of
serum MMP-9/TIMP-1 ratio significantly higher in STEMI compared to NSTEMI
group (p = 0.003) and in the STEMI and UAP group (0.026), but did not differ
significantly in NSTEMI and UAP group (p = 0.045).
Conclusion: High levels of serum MMP-9/TIMP-1 ratio in patients with
STEMI than NSTEACS may explain the role of serum MMP-9/TIMP-1 ratio
in differentiating the pathogenesis of STEMI and NSTE-ACS.
(J Kardiol Indones. 2013;34:160-6)


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Differences of Serum Ratio MMP-9/TIMP-1 in ST-Elevation Myocardial Infarction (STEMI) and Non ST-Elevation Acute Coronary Syndrome (NSTEACS). (2014). Indonesian Journal of Cardiology, 34(3), 160-6. https://doi.org/10.30701/ijc.v34i3.337
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