(–)-Epigallocatechin-3-O-gallate (EGCG) attenuates the hemodynamics stimulated by caffeine through decrease of catecholamines release

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• 作者：Jin-Yi Han ; Yong-Jin Moon ; Jong-Hyun Han ; Jong-Hoon Kim…
• 关键词：Epigallocatechin ; 3 ; O ; gallate (EGCG) ; Caffeine ; Hemodynamics ; Catecholamines ; Counteraction ; Blood pressure ; Heart rate
• 刊名：Archives of Pharmacal Research
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：39
• 期：9
• 页码：1307-1312
• 全文大小：566 KB
• 刊物主题：Pharmacy; Pharmacology/Toxicology;
• 出版者：Springer Netherlands
• ISSN：1976-3786
• 卷排序：39

文摘

A human study of the effects on hemodynamics of caffeine and epigallocatechin-3-O-gallate (EGCG) was performed. Caffeine tablets (200 mg) were orally administered to healthy males aged between 25 and 35 years 30 min after oral administration of EGCG tablets (100 and 200 mg). The increase in BP induced by caffeine was inhibited when co-administrated with EGCG. We found that caffeine slightly decreased heart rate (HR) in the volunteers. Although EGCG enhanced HR reduction, the effect was not significant. In addition, caffeine increased blood catecholamine levels, but EGCG inhibited the increase in noradrenaline, adrenaline and dopamine levels induced by caffeine. Whether EGCG decreases the elevated HR and systolic perfusion pressure, and ventricular contractility induced by adrenergic agonists in the isolated rat heart was investigated. The modified Krebs–Henseleit solution was perfused through a Langendorff apparatus to the isolated hearts of rats. HR, systolic perfusion pressure, and developed maximal rates of contraction (+dP/dt_max) and relaxation (−dP/dt_max) were increased by epinephrine (EP) and isoproterenol (IP). In contrast, EGCG decreased the elevated HR, systolic perfusion pressure, and left ventricular ±dp/dt_max induced by EP and/or IP. In conclusion, EGCG could attenuate the hemodynamics stimulated by caffeine through decreasing catecholamine release.