WNT Signaling in Adult Cardiac Hypertrophy and Remodeling Lessons Learned From Cardiac Development

被引:170
作者
Bergmann, Martin W. [1 ,2 ]
机构
[1] Charite Campus Buch, Expt & Clin Res Ctr, Berlin, Germany
[2] Max Delbruck Ctr Mol Med, Berlin, Germany
关键词
heart failure; progenitor cells; angiogenesis; WNT; beta-catenin; FRIZZLED-RELATED PROTEIN-2; CATENIN DOWN-REGULATION; BETA-CATENIN; STEM-CELL; CARDIOVASCULAR PROGENITORS; WNT/FRIZZLED PATHWAY; GENE-EXPRESSION; IN-VITRO; HEART; DIFFERENTIATION;
D O I
10.1161/CIRCRESAHA.110.223768
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
On pathological stress, the heart reactivates several signaling pathways that traditionally were thought to be operational only in the developing heart. One of these pathways is the WNT signaling pathway. WNT controls heart development but is also modulated during adult heart remodeling. This review summarizes the currently available data regarding WNT signaling during left ventricular (LV) remodeling. Upstream, soluble frizzled-related proteins (sFRPs) block WNT-dependent activation of the canonical WNT pathway. By inhibition of WNT activation, these factors also reduce beta-catenin dependent transcription by altering the ratio of cytoplasmic/nuclear beta-catenin. In experimental settings, sFRPs injected into the heart attenuated LV remodeling. sFRPs are secreted from autologous bone marrow derived mononuclear cells. Disheveled is a signaling intermediate of both the canonical and noncanonical WNT pathway. Similarly to the effect of sFRP, depletion of a disheveled isoform attenuated LV remodeling. In contrast, disheveled activation led to progressive dilated cardiomyopathy. Inhibition of nuclear beta-catenin signaling downstream of the canonical WNT pathway significantly reduced postinfarct mortality and functional decline of LV function following chronic left anterior descending coronary artery ligation. WNT signaling also affects mobilization and homing of bone marrow-derived vasculogenic progenitor cells. Finally, heart-specific WNT/beta-catenin interaction partners have been identified that will possibly allow targeting this pathway in a tissue-specific manner. In summary, the WNT pathway plays a pivotal role in adult cardiac remodeling and may be suitable for therapeutic interventions. Currently, several molecular and cellular mechanisms whereby WNT inhibition attenuates LV remodeling are proposed. Reactivation of the developmental program to restore functional LV myocardium from resident precursor cells may significantly contribute to this process. (Cire Res. 2010;107:1198-1208.)
引用
收藏
页码:1198 / 1208
页数:11
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