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- W2930462009 abstract "Background: Stromal interacting molecule 1 (STIM1) is a calcium sensor in the endoplasmic reticulum (ER). We previously reported that STIM1 plays opposing roles in vascular smooth muscle cells (SMC) vs. endothelial cell in the regulation of vascular reactivity. However, the role of SMC STIM1 in heart failure is yet to be determined. Methods and Results: We utilize control (C57/Bl6) and mice lacking STIM1 specifically in SMC (Stim1 SMC-/- ). We subjected all mice to left anterior descending coronary artery (LAD) permanent occlusion for 3 weeks. We performed echocardiography before the LAD ligation and 3 week after. In the end, we sacrificed mice and harvested the heart for biochemical and histology studies. The heart weight, collagen, and infarct area were significantly augmented in control mice subjected to LAD occlusion. The diastolic (Ejection fraction) and systolic functions (fractional shortening) were significantly compromised in control mice subjected to LAD occlusion. Interestingly, the cardiac hypertrophy, the collagen content, the infarct area, the ejection fraction, and the fraction shortening were protected in Stim1 SMC-/- mice subjected to LAD occlusion. The protective effect of STIM1 disruption in SMC involved the reduction in ER stress activation, the autophagy, and apoptosis mechanisms. Conclusion: Our results indicate that the disruption of STIM1 in SMC protects the heart against chronic ischemia through the inhibition of ER stress, autophagy, and apoptosis." @default.
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- W2930462009 date "2016-07-22" @default.
- W2930462009 modified "2023-09-23" @default.
- W2930462009 title "Abstract 447: Essential Role of Stromal Interaction Molecule 1 in Heart Failure" @default.
- W2930462009 doi "https://doi.org/10.1161/res.119.suppl_1.447" @default.
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