Department of Cell Biology and Molecular Medicine, Rutgers New Jersey Medical School, Newark, New Jersey, USA.
Department of Molecular Pharmacology, Kitasato University School of Pharmaceutical Sciences, Tokyo, Japan.
J Clin Invest. 2022 Mar 15;132(6). doi: 10.1172/JCI150595.
The heart utilizes multiple adaptive mechanisms to maintain pump function. Compensatory cardiac hypertrophy reduces wall stress and oxygen consumption, thereby protecting the heart against acute blood pressure elevation. The nuclear effector of the Hippo pathway, Yes-associated protein 1 (YAP), is activated and mediates compensatory cardiac hypertrophy in response to acute pressure overload (PO). In this study, YAP promoted glycolysis by upregulating glucose transporter 1 (GLUT1), which in turn caused accumulation of intermediates and metabolites of the glycolytic, auxiliary, and anaplerotic pathways during acute PO. Cardiac hypertrophy was inhibited and heart failure was exacerbated in mice with YAP haploinsufficiency in the presence of acute PO. However, normalization of GLUT1 rescued the detrimental phenotype. PO induced the accumulation of glycolytic metabolites, including l-serine, l-aspartate, and malate, in a YAP-dependent manner, thereby promoting cardiac hypertrophy. YAP upregulated the GLUT1 gene through interaction with TEA domain family member 1 (TEAD1) and HIF-1α in cardiomyocytes. Thus, YAP induces compensatory cardiac hypertrophy through activation of the Warburg effect.
心脏利用多种适应性机制来维持泵功能。代偿性心肌肥厚可降低壁应力和耗氧量,从而保护心脏免受急性血压升高的影响。Hippo 通路的核效应因子,Yes 相关蛋白 1(YAP),在急性压力超负荷(PO)下被激活并介导代偿性心肌肥厚。在这项研究中,YAP 通过上调葡萄糖转运蛋白 1(GLUT1)促进糖酵解,这反过来导致急性 PO 期间糖酵解、辅助和氨酰化途径的中间产物和代谢物积累。在急性 PO 存在的情况下,YAP 杂合不足的小鼠中,心肌肥厚受到抑制,心力衰竭加剧。然而,GLUT1 的正常化挽救了有害表型。PO 以 YAP 依赖性方式诱导糖酵解代谢物(包括 l-丝氨酸、l-天冬氨酸和苹果酸)的积累,从而促进心肌肥厚。YAP 通过与心肌细胞中的 TEA 结构域家族成员 1(TEAD1)和 HIF-1α 的相互作用,上调 GLUT1 基因。因此,YAP 通过激活瓦伯格效应诱导代偿性心肌肥厚。
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