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Matrix remodeling promotes pulmonary hypertension through feedback mechanoactivation of the YAP/TAZ-miR-130/301 circuit #MMPMID26565914
Bertero T; Cottrill KA; Lu Y; Haeger CM; Dieffenbach P; Annis S; Hale A; Bhat B; Kaimal V; Zhang YY; Graham BB; Kumar R; Saggar R; Saggar R; Wallace WD; Ross DJ; Black SM; Fratz S; Fineman JR; Vargas SO; Haley KJ; Waxman AB; Chau BN; Fredenburgh LE; Chan SY
Cell Rep 2015[Nov]; 13 (5): 1016-32 PMID26565914show ga
Pulmonary hypertension (PH) is a deadly vascular disease with enigmatic molecular origins. We found that vascular extracellular matrix (ECM) remodeling and stiffening are early and pervasive processes that promote PH. In multiple pulmonary vascular cell types, such ECM stiffening induced the microRNA-130/301 family via activation of co-transcription factors YAP/TAZ. MicroRNA-130/301 controlled a PPAR?-APOE-LRP8 axis, promoting collagen deposition and LOX-dependent remodeling and further up-regulating YAP/TAZ via a mechanoactive feedback loop. In turn, ECM remodeling controlled pulmonary vascular cell crosstalk via such mechanotransduction, modulation of secreted vasoactive effectors, and regulation of associated microRNA pathways. In vivo, pharmacologic inhibition of microRNA-130/301, APOE, or LOX activity ameliorated ECM remodeling and PH. Thus, ECM remodeling, as controlled by the YAP/TAZ-miR-130/301 feedback circuit, is an early PH trigger and offers combinatorial therapeutic targets for this devastating disease.