Oral treatment with Euterpe oleracea Mart. (açaí) extract improves cardiac dysfunction and exercise intolerance in rats subjected to myocardial infarction

BMC Complementary and Alternative Medicine

Research Article

Pergentino JC Souza¹  Roberto S de Moura¹  Jaqueline S da Silva²  Sharlene L Pereira²  Gisele Zapata-Sudo²  Roberto Takashi Sudo² 

[1] Departamento de Farmacologia e Psicobiologia, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil;Programa de Desenvolvimento de Fármacos, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil;

关键词: Euterpe oleracea;    Myocardial infarction;    Exercise intolerance;    Left ventricular dysfunction;    Cardiac hypertrophy;   

DOI  :  10.1186/1472-6882-14-227

 received in 2013-10-07, accepted in 2014-06-30,  发布年份 2014

来源: Springer

【 摘 要 】

BackgroundThis study was designed to evaluate the cardioprotective effects of Euterpe oleracea Mart., popularly known as “açaí”, on rats subjected to myocardial infarction (MI).MethodsHydroalcoholic extracts of açaí were obtained from a decoction of the seeds. Two male Wistar rat groups were delineated: 1) the sham-operated group (control, n = 6), with no surgical amendment, and 2) the MI group (n = 12), in which the anterior descendent coronary artery was occluded during surgery. MI group was divided into two subgroups, in which rats were either treated with hydroalcoholic extract of Euterpe oleracea seeds (100 mg/kg/day p.o.) or received no treatment. Treatment began on the day of surgery, and lasted 4 weeks. Subsequently, rats were subject to an exercise test protocol, hemodynamic evaluation, and histological analysis of the left ventricle. Groups were compared using one-way analysis of variance (ANOVA), followed by Dunnett’s test.ResultsThe total running distance of sham rats was 1339.0 ± 276.6 m, MI rats was 177.6 ± 15.8 m (P < 0.05), and MI-açaí rats was 969.9 ± 362.2 m. Systolic arterial pressure was significantly decreased in MI rats (86.88 ± 4.62 mmHg) compared to sham rats (115.30 ± 7.24 mmHg; P < 0.05). Açaí treatment prevented a reduction in systolic arterial pressure (130.00 ± 8.16 mmHg) compared to MI rats (P < 0.05). Left ventricular (LV) end-diastolic pressure was significantly augmented in MI rats (17.62 ± 1.21 mmHg) compared to sham rats (4.15 ± 1.60 mmHg; P < 0.05), but was 3.69 ± 2.69 mmHg in açaí-treated rats (P < 0.05 vs. MI). The LV relaxation rate (-dp/dt) was reduced in MI rats compared to the sham group, whereas açaí treatment prevented this reduction. Açaí treatment prevented cardiac hypertrophy and LV fibrosis in MI rats.ConclusionsEuterpe oleracea treatment of MI rats prevented the development of exercise intolerance, cardiac hypertrophy, fibrosis, and dysfunction.

【 授权许可】

CC BY   
© Zapata-Sudo et al.; licensee BioMed Central Ltd. 2014