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Published on: June 14, 2016
[Left ventricular mass, diastolic function and collagen metabolism biomarkers in essential hypertension]
Carlos Macías Blanco1, Daniel Fatela-Cantillo, Luis Jiménez-Jiménez
1Empresa Pública Hospital Alto Guadalquivir, Hospital Alta Resolución Valle del Guadiato, Peñarroya, Córdoba, España. charlymacias@hotmail.com
Insights
Markers of collagen metabolism, including carboxy-terminal propeptide of procollagen type I (PICP), are linked to left ventricular hypertrophy and diastolic dysfunction in resistant hypertension, independent of blood pressure. This highlights collagen
Area of Science:
- Cardiovascular Research
- Biochemistry
- Hypertension Studies
Context:
- Resistant hypertension is associated with significant cardiovascular remodeling.
- Collagen metabolism plays a crucial role in cardiac structure and function.
- Understanding molecular mechanisms underlying hypertensive heart disease is vital.
Purpose:
- To investigate the association between serum collagen metabolism biomarkers and left ventricular mass index (LVMI) in resistant hypertension.
- To evaluate the relationship between these biomarkers and diastolic dysfunction.
- To compare biomarker levels in patients with resistant hypertension versus healthy controls.
Summary:
- Patients with resistant hypertension exhibited elevated PICP and reduced ICTP levels compared to controls.
- PICP showed a significant positive correlation with LVMI and a negative correlation with diastolic function.
- Differences in collagen biomarkers were observed between groups with and without hypertrophy or diastolic dysfunction, irrespective of blood pressure levels.
Impact:
- These findings suggest that collagen synthesis and degradation markers may be independently associated with myocardial hypertrophy and diastolic dysfunction in resistant hypertension.
- This research provides insights into the pathobiology of hypertensive heart disease.
- Identifies potential biomarkers for assessing cardiac remodeling in hypertensive patients.
Background And Objective:
To evaluate the association between circulating biomarkers of collagen metabolism in serum, left ventricular mass index (LVMI) and diastolic dysfunction in patients with resistant hypertension.
Patients And Methods:
Fifty-two patients with resistant hypertension and 24 healthy individuals were included. The following biomarkers of collagen metabolism were analyzed by ELISA: carboxy-terminal propeptide of procollagen type I (PICP) and transforming growth factor beta1 (TGFβ1). The biomarker C-terminal telopeptide of collagen type-I (ICTP) was assayed by electrochemiluminescence immunoassay. In the patient's group a record of 24-h blood pressure monitoring was obtained and an echocardiography was performed. Left ventricular mass was measured according to the formula of Devereux and the diastolic function according to the relation of E and A waves and mitral propagation velocity.
Results:
Hypertensive patients showed higher levels of PICP and lower levels of ICTP than controls: 83.7 (24.7) vs. 55.0 (8.7), P<.0001; and 175.0 (136.4) vs. 323.3 (121.3), P<.0001). Hypertensive patients showed a significant relationship between PICP and LVMI (r=0.631, P<.0001) and between PICP and diastolic dysfunction (r=-0.519, P<.0001). The groups with and without hypertrophy, and with or without diastolic dysfunction, differed in the mentioned peptides but not in BP values.
Conclusions:
Our findings suggest that the analyzed markers of synthesis and degradation of collagen may be related to myocardial hypertrophy and diastolic dysfunction independent of blood pressure values.
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