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[Effect of simvastatin on cardiac fibrosis in patients with essential hypertension]
Guo-Gang Zhang1, Sai-Dan Zhang
1Department of Cardiology, Xiangya Hospital, Central South University, Changsha 410008, China. xyzzgg@sina.com
Insights
Adding simvastatin to benazepril significantly reduced myocardial fibrosis and improved cardiac function in patients with essential hypertension. This combination therapy offers a promising approach for managing cardiac remodeling in hypertensive individuals.
Area of Science:
- Cardiology
- Pharmacology
- Hypertension Research
Context:
- Essential hypertension (EH) is a significant risk factor for cardiovascular complications, including myocardial fibrosis and left ventricular hypertrophy.
- Current treatments primarily focus on blood pressure control, but addressing the underlying fibrotic processes is crucial for improving long-term outcomes.
Purpose:
- To investigate the efficacy of simvastatin, in combination with benazepril, an angiotensin-converting enzyme inhibitor, in mitigating myocardial fibrosis and improving cardiac function in patients with essential hypertension.
Summary:
- A 6-month randomized study compared benazepril alone versus simvastatin plus benazepril in 60 EH patients.
- Measurements included serum procollagen peptides (PIIIP, PIVP), plasma TGF-β1, and Doppler echocardiographic parameters.
- The combination group showed significantly greater reductions in TGF-β1 and improved diastolic function (VE/VA ratio) compared to benazepril alone.
Impact:
- Simvastatin combined with ACE inhibitors effectively reduces myocardial fibrosis and ameliorates left ventricular hypertrophy and diastolic dysfunction in EH patients.
- This therapeutic strategy may offer a novel approach to target fibrotic pathways and improve cardiac remodeling in hypertension.
Objective:
To explore the effect of simvastatin on myocardiac fibrosis in patients with essential hypertension (EH).
Methods:
Sixty EH patients were randomly assigned into 2 groups: Benazepril (10 mg/d) group (n = 28) and simvastatin (20 mg/d) + benazepril (10 mg/d) group. Procollagen type III aminoterminal peptide (PIIIP), and procollagen type IV aminoterminal peptide (PIVP) levels in serum as well as transforming growth factor beta 1 (TGFbeta1) level in plasma were measured by radioimmunoassay (RIA) before and 6 months after the treatment. Doppler ultrasound recordings were obtained from all patients before and 6 months after the treatment to determine several parameters related to the left ventricular anatomy and function.
Results:
After 6 month of treatment, the mean blood pressure (MBP), PIIIP, PIVP, TGFbeta1, left ventricular mass index (LVMI), interventricular spectum dimension (IVSD), and left ventricular posterio wall dimension (LPWD) in the 2 groups were significantly lower than those before the treatment. TGFbeta1 decreased in the simvastatin and benazepril group compared with the benazepril group (P < 0.01). The ratio of early diastolic blood flow velocity of mitral valve (VE) and blood flow velocity of atrium systolic period (VA) in the 2 groups significantly increased after 6 months of treatment, and the ratio in the simvastatin and benazepril group was significantly higher than that in the enazepril group (P < 0.05).
Conclusion:
Angiotension converting enzyme inhibitor combined with simvastatin is helpful to reduce the myocardial fibrosis and to improve the left ventricular hypertrophy and diastolic function in EH patients.
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