Summary The maturation of human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) is of critical importance in the field of cardiovascular regenerative medicine. However, studies have largely focused on individual factors that promote maturation, leaving the molecular mechanisms underlying maturation unexplored. Here, we investigated how hormonal and metabolic maturation inducing factors (MIF) reprogram CMs to a more mature state through molecular mechanisms. Using a multiomics approach to assess th…

Human induced pluripotent stem cell-derived cardiomyocytes (hiPSCCMs) offer numerous advantages as a biological model, yet their inherent immaturity compared to adult cardiomyocytes poses significant limitations. This study addresses hiPSCCM immaturity by introducing a physiologically relevant micropatterned substrate for long-term culture and maturation. An innovative microfabrication methodology combining laser etching and casting creates a micropatterned polydimethylsiloxane (PDMS) substrate with varying stiffn…

Background Mechanical stress and pathological signaling trigger the activation of fibroblasts to myofibroblasts, which impacts extracellular matrix composition, disrupts normal wound healing, and can generate deleterious fibrosis. Myocardial fibrosis independently promotes cardiac arrhythmias, sudden cardiac arrest, and contributes to the severity of heart failure. Fibrosis can also alter cell-to-cell communication and increase myocardial stiffness which eventually may lead to lusitropic and inotropic cardiac dysf…

Abstract Hypertrophic cardiomyopathy (HCM) is one of the most common heritable cardiovascular diseases and variants of TNNT2 (cardiac troponin T) are linked to increased risk of sudden cardiac arrest despite causing limited hypertrophy. In this study, a TNNT2 variant, R278C +/- , was generated in both human cardiac recombinant/reconstituted thin filaments (hcRTF) and human-induced pluripotent stem cells (hiPSCs) to investigate the mechanisms by which the R278C +/- variant affects cardiomyocytes at the proteomic an…

1. Summary Mechanical stress and pathological signaling trigger the activation of fibroblasts to myofibroblasts, which impacts extracellular matrixcomposition, disrupts normal wound healing,andcan generate deleterious fibrosis (Bohl et al., 2008; Sutton and Sharpe, 2000). Myocardial fibrosis independently promotes cardiac arrhythmias, sudden cardiac arrest, and contributes to the severity of heart failure (Frangogiannis, 2021). Fibrosis can also alter cell-to-cell communication and increase myocardial stiffness wh…