BACKGROUND: Considering the high morbidity and mortality after myocardial infarction (MI), the study of compounds with potential benefits for cardiac remodeling is reasonable. Green tea (GT) (Cammellia sinensis) is the most consumed beverage in the world. The potential action mechanisms of GT include anti-inflammatory, anti-apoptotic, antioxidant, and lipid-lowering properties. OBJECTIVE: This study analyzed the effects of GT on cardiac remodeling following coronary occlusion in rats. METHODS: Male Wistar rats were divided into four groups: control (C), control green tea (GT), myocardial infarction (MI), and myocardial infarction and green tea (MI-GT). GT and MI-GT were fed with standard chow with 0.25% Polyphenon 60 (Sigma-Aldrich Canada, Oakville, ON, Canada). After 3months of observation, echocardiographic and isolated heart study, oxidative stress, energy metabolism, serum lipids, extracellular matrix, and apoptosis were evaluated. RESULTS: GT reduced cardiac hypertrophy and improved systolic and diastolic dysfunction. Concerning oxidative stress, GT reduced protein carbonyl, increased Nrf-2, and restored antioxidant enzyme activity to the control pattern. Energy metabolism was affected by MI that presented with lower fatty acid oxidation and accumulation of triacylglycerol, increased serum lipids, impairment of the citric acid cycle, and oxidative phosphorylation. GT stimulated the glucose pathway and mitochondrial function after MI by increasing pyruvate dehydrogenase, Complex I, ATP synthase, and glycogen storage. In addition, MI changed the extracellular matrix including MMP-2 and TIMP-1 activity and increased apoptosis by 3-caspase, all of which were attenuated by GT. CONCLUSION: GT attenuated cardiac remodeling after MI, associated with improvement in systolic and diastolic dysfunction. Oxidative stress, energy metabolism, apoptosis, and extracellular matrix alterations are all potential mechanisms by which GT may take part.
BACKGROUND: Considering the high morbidity and mortality after myocardial infarction (MI), the study of compounds with potential benefits for cardiac remodeling is reasonable. Green tea (GT) (Cammellia sinensis) is the most consumed beverage in the world. The potential action mechanisms of GT include anti-inflammatory, anti-apoptotic, antioxidant, and lipid-lowering properties. OBJECTIVE: This study analyzed the effects of GT on cardiac remodeling following coronary occlusion in rats. METHODS: Male Wistar rats were divided into four groups: control (C), control green tea (GT), myocardial infarction (MI), and myocardial infarction and green tea (MI-GT). GT and MI-GT were fed with standard chow with 0.25% Polyphenon 60 (Sigma-Aldrich Canada, Oakville, ON, Canada). After 3months of observation, echocardiographic and isolated heart study, oxidative stress, energy metabolism, serum lipids, extracellular matrix, and apoptosis were evaluated. RESULTS: GT reduced cardiac hypertrophy and improved systolic and diastolic dysfunction. Concerning oxidative stress, GT reduced protein carbonyl, increased Nrf-2, and restored antioxidant enzyme activity to the control pattern. Energy metabolism was affected by MI that presented with lower fatty acid oxidation and accumulation of triacylglycerol, increased serum lipids, impairment of the citric acid cycle, and oxidative phosphorylation. GT stimulated the glucose pathway and mitochondrial function after MI by increasing pyruvate dehydrogenase, Complex I, ATP synthase, and glycogen storage. In addition, MI changed the extracellular matrix including MMP-2 and TIMP-1 activity and increased apoptosis by 3-caspase, all of which were attenuated by GT. CONCLUSION: GT attenuated cardiac remodeling after MI, associated with improvement in systolic and diastolic dysfunction. Oxidative stress, energy metabolism, apoptosis, and extracellular matrix alterations are all potential mechanisms by which GT may take part.
Authors: Ying Wei; Thomas J Kim; David H Peng; Dana Duan; Don L Gibbons; Mitsuo Yamauchi; Julia R Jackson; Claude J Le Saux; Cheresa Calhoun; Jay Peters; Rik Derynck; Bradley J Backes; Harold A Chapman Journal: J Clin Invest Date: 2017-09-05 Impact factor: 14.808
Authors: Bruna Paola Murino Rafacho; Priscila Portugal Dos Santos; Andréa de Freitas Gonçalves; Ana Angélica Henrique Fernandes; Katashi Okoshi; Fernanda Chiuso-Minicucci; Paula S Azevedo; Leonardo Antonio Mamede Zornoff; Marcos Ferreira Minicucci; Xiang-Dong Wang; Sergio Alberto Rupp de Paiva Journal: PLoS One Date: 2017-05-11 Impact factor: 3.240
Authors: Maram M Aboulwafa; Fadia S Youssef; Haidy A Gad; Ahmed E Altyar; Mohamed M Al-Azizi; Mohamed L Ashour Journal: Antioxidants (Basel) Date: 2019-10-06
Authors: Pamela N Modesto; Bertha F Polegato; Priscila P Dos Santos; Leticia D V Grassi; Leticia C C Molina; Silmeia G Z Bazan; Elenize J Pereira; Ana Angelica H Fernandes; Alexandre T Fabro; Vickeline N Androcioli; Meliza G Roscani; Sergio A R de Paiva; Leonardo A M Zornoff; Marcos F Minicucci; Paula S Azevedo Journal: Oxid Med Cell Longev Date: 2021-05-05 Impact factor: 6.543
Authors: Bruna C Oliveira; Priscila P Santos; Amanda M Figueiredo; Bruna P M Rafacho; Larissa Ishikawa; Silméia G Zanati; Ana A H Fernandes; Paula S Azevedo; Bertha F Polegato; Leonardo A M Zornoff; Marcos F Minicucci; Sergio A R Paiva Journal: Arq Bras Cardiol Date: 2021-06 Impact factor: 2.000