Document Detail


Influence of Valsartan on myocardial apoptosis in spontaneously hypertensive rats.
MedLine Citation:
PMID:  11940365     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: To explore the pathogenic changes of myocardial apoptosis in heart hypertrophy during hypertension and evaluate the anti-apoptosis effect of Valsartan. METHODS: Thirty spontaneously hypertensive rats (SHRs) were divided into two groups: 15 treated with Valsartan (20 mg x kg(-1) x d(-1)) (SHR + Valsartan group), the others with placebo (SHR + placebo group), with 15 normal Wistar rats as control. Systolic blood pressure was measured by the tail-cuff method. The observation period was from 8 to 16 weeks of age. Cardiac apoptosis was evaluated by a Terminal Deoxynucleotidyl Transferase-Mediated dUTP-biotin Nick End Labeling (TUNEL) assay. RESULTS: Mean blood pressure values were 127 +/- 2 mm Hg in controls, 163 +/- 6 mm Hg in the SHR + Valsartan group and 193 +/- 7 mm Hg in the SHR + placebo group at 16 weeks of age, whereas the blood pressure in 8-week-old SHR and Wistar rats were 175 +/- 3 mm Hg and 125 +/- 5 mm Hg, respectively. The ratio of the heart weight over body weight declined in Wistar (3.07 +/- 0.03 mg/g) and SHR + Valsartan groups (3.22 +/- 0.19 mg/g) compared with the SHR + placebo group (4.02 +/- 0.31 mg/g) (P < 0.05). The density of TUNEL-positive cells in Wistar and SHR +/- Valsartan groups was 23.3 +/- 3.3 nuclei/HPF and 35.0 +/- 1.3 nuclei/HPF, both of which were significantly less than that of the SHR + placebo group (116.7 +/- 11.3 nuclei/HPF). CONCLUSIONS: In response to chronic pressure overload, cardiomyocyte-specific apoptosis contributes to the transition from compensatory hypertrophy to decompensation. Apoptosis may be effectively inhibited by Valsartan in the early stage of hypertension.
Authors:
Weimin Li; Ningling Sun; Wei Liu; Yuanyuan Chen; Youzhi Yu
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Chinese medical journal     Volume:  115     ISSN:  0366-6999     ISO Abbreviation:  Chin. Med. J.     Publication Date:  2002 Mar 
Date Detail:
Created Date:  2002-04-09     Completed Date:  2002-05-01     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  7513795     Medline TA:  Chin Med J (Engl)     Country:  China    
Other Details:
Languages:  eng     Pagination:  364-6     Citation Subset:  IM    
Affiliation:
Department of Cardiology, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China. wml@public.hr.hl.cn
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MeSH Terms
Descriptor/Qualifier:
Animals
Antihypertensive Agents / pharmacology*
Apoptosis / drug effects*
Cardiomegaly / pathology
Hypertension / pathology*
Myocardium / cytology*
Rats
Rats, Inbred SHR
Rats, Wistar
Tetrazoles / pharmacology*
Valine / analogs & derivatives,  pharmacology*
Chemical
Reg. No./Substance:
0/Antihypertensive Agents; 0/Tetrazoles; 137862-53-4/valsartan; 7004-03-7/Valine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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