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Updated: Jan 27, 2026
Detection of Functional Matrix Metalloproteinases by Zymography
Published on: November 8, 2010
Leukocyte matrix metalloproteinase and tissue inhibitor gene expression patterns in children with primary
Joanna B Trojanek1, Anna Niemirska2, Renata Grzywa1
1Department of Microbiology and Clinical Immunology, The Children's Memorial Health Institute, Warsaw, Poland.
Insights
Hypertensive adolescents show altered matrix metalloproteinase (MMP) and tissue inhibitor of metalloproteinase (TIMP) gene expression in leukocytes compared to normotensive peers. These changes are linked to cardiovascular damage and metabolic issues.
Area of Science:
- Cardiovascular Science
- Molecular Biology
- Pediatric Hypertension
Background:
- Matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) are crucial in cardiovascular remodeling.
- Understanding MMP/TIMP gene expression in pediatric hypertension is vital for assessing cardiovascular risk.
Purpose of the Study:
- To investigate MMP and TIMP gene expression in peripheral blood leukocytes of hypertensive adolescents.
- To compare gene expression patterns between hypertensive and normotensive children.
- To correlate MMP/TIMP expression with target organ damage and metabolic factors.
Main Methods:
- Quantitative real-time PCR was used to assess MMP and TIMP expression in leukocytes.
- Study included 80 hypertensive and 78 age-matched normotensive children.
- Expression levels were analyzed in relation to clinical parameters.
Main Results:
- Hypertensive children exhibited significantly higher MMP-2 expression than normotensive controls.
- MMP-14 expression was elevated in hypertensive patients with left ventricular hypertrophy.
- TIMP-2 expression correlated with carotid wall thickness, while MMP-14 correlated with BMI, waist circumference, hsCRP, HDL-cholesterol, and uric acid.
Conclusions:
- Adolescent hypertension is associated with distinct alterations in MMP/TIMP gene expression.
- Altered MMP/TIMP expression patterns are linked to target organ damage and metabolic abnormalities in hypertensive adolescents.
Abstract:
Matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) play an important role in cardiovascular remodeling. The aim of the study was to analyze MMP/TIMP genes expression in peripheral blood leukocytes of 80 hypertensive children (15.1 ± 2.0 years) in comparison with age-matched 78 normotensive children (14.6 ± 2.0 years; n.s.). TIMP and MMP expression in peripheral blood leukocytes was assessed by quantitative real-time PCR. Hypertensive children independently of age, sex, and body mass index had greater expression of MMP-2 than normotensive controls (p = 0.0001). Patients with left ventricular hypertrophy had greater expression of MMP-14 than patients with normal left ventricular mass (p = 0.006) and TIMP-2 expression correlated with carotid wall cross-sectional area (p = 0.03; r = 0.238). MMP-14 expression correlated with BMI-SDS (p = 0.001; r = 0.371), waist circumference-SDS (p = 0.016; r = 0.290), hsCRP (p = 0.003; r = 0.350), serum HDL-cholesterol (p = 0.008; r = -0.304), and serum uric acid (p = 0.0001; r = 0.394). In conclusion, hypertensive adolescents presented significant alterations of MMP/TIMP expression pattern in comparison with normotensive peers. Moreover, altered MMP/TIMP expression was associated with hypertensive target organ damage and metabolic abnormalities.
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