Disparate Effects of Stilbenoid Polyphenols on Hypertrophic Cardiomyocytes In Vitro vs. in the Spontaneously Hypertensive Heart Failure Rat
作者:Bolanle Akinwumi、Pema Raj、Danielle Lee、Crystal Acosta、Liping Yu、Samuel Thomas、Kalyanam Nagabhushanam、Muhammed Majeed、Neal Davies、Thomas Netticadan、Hope Anderson
DOI:10.3390/molecules22020204
日期:——
Stilbenoids are bioactive polyphenols, and resveratrol (trans-3,5,40-trihydroxystilbene) is a representative stilbenoid that reportedly exerts cardioprotective actions. As resveratrol exhibits low oral bioavailability, we turned our attention to other stilbenoid compounds with a history of medicinal use and/or improved bioavailability. We determined the effects of gnetol (trans-3,5,20,60-tetrahydroxystilbene) and pterostilbene (trans-3,5-dimethoxy-40-hydroxystilbene) on cardiac hypertrophy. In vitro, gnetol and pterostilbene prevented endothelin-1-induced indicators of cardiomyocyte hypertrophy including cell enlargement and protein synthesis. Gnetol and pterostilbene stimulated AMP-activated protein kinase (AMPK), and inhibition of AMPK, using compound C or shRNA knockdown,abolished these anti-hypertrophiceffects. In contrast,resveratrol, gnetol, nor pterostilbene reduced blood pressure or hypertrophy in the spontaneously hypertensive heart failure (SHHF) rat. In fact, AMPK levels were similar between Sprague-Dawley and SHHF rats whether treated by stilbenoids or not. These data suggest that the anti-hypertrophic actions of resveratrol (and other stilbenoids?) do not extend to the SHHF rat, which models heart failure superimposed on hypertension. Notably, SHHF rat hearts exhibited prolonged isovolumic relaxationtime(an indicator of diastolicdys function),and this was improved by stilbenoid treatment.In conclusion, stilbenoid-based treatment as a viable strategy to prevent pathological cardiac hypertrophy,a major risk factor for heart failure,may be context-dependent and requires furtherstudy.
二苯乙烯类化合物是具有生物活性的多酚类物质,白藜芦醇(反式-3,5,40-三羟基二苯乙烯)是二苯乙烯类化合物的一种代表,据称具有保护心脏的作用。由于白藜芦醇的口服生物利用度较低,我们将注意力转向其他具有药用历史和/或提高生物利用度的二苯乙烯类化合物。我们研究了gnetol(反式-3,5,20,60-四羟基二苯乙烯)和紫檀芪(反式-3,5-二甲氧基-40-羟基二苯乙烯)对心脏肥大的影响。在体外,gnetol和紫檀芪可防止内皮素-1诱导的心肌细胞肥大指标,包括细胞增大和蛋白质合成。gnetol和紫檀芪可刺激AMP激活蛋白激酶(AMPK),而使用化合物C或shRNA敲除抑制AMPK,则可消除这些抗肥大的作用。相比之下,白藜芦醇、gnetol和紫檀芪可降低自发性高血压性心力衰竭(SHHF)大鼠的血压或肥大程度。事实上,无论是否使用二苯乙烯类化合物治疗,Sprague-Dawley大鼠和SHHF大鼠的AMPK水平都相似。这些数据