ArticleProteomics. Clinical applications2026
Proteomic Remodeling in the Failing Left Ventricle Adapting to Dyssynchrony.
Article in Proteomics. Clinical applications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeIn heart failure, dyssynchrony is associated with accelerated cardiac remodeling and a worse prognosis. Both restored with resynchronization. We have previously developed a mouse model of dyssynchrony and resynchronization and here assess changes in protein expression within that model. EXPERIMENTAL
designMice were subjected to ischemia/reperfusion followed by pacemaker implantation. Three groups were defined: (i) sinus rhythm for 4 weeks-synchronous heart failure (SynHF), (ii) right ventricular pacing (RVP) for 4 weeks-dyssynchronous heart failure (DysHF), and (iii) RVP for 2 weeks followed by 2 weeks of sinus rhythm-resynchronized heart failure (ResynHF). Heart tissue was evaluated for protein content with mass spectrometry.
resultsA total of 3324 proteins were detected. The abundance of 589 proteins differed between DysHF and SynHF and 253 between DysHF and ResynHF. The changed proteins in the comparisons to DysHF overlapped to a great extent. Several of these proteins were connected to calcium handling or made up part of the sarcomere.
conclusionAdding dyssynchrony to ischemic heart failure resulted in protein dysregulation, which was partly reversed by resynchronization. The dysregulation was characterized by a change in proteins related to contractility, which may be part of the positive inotropic effect and reverse remodeling observed with resynchronization.
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