Projects per year
Abstract / Description of output
Background: Mechanisms contributing to tissue remodelling of the infarcted heart following cell-based therapy remain elusive. Whilst cell-based interventions have the potential to influence the cardiac healing process, there is little direct evidence of preservation of functional myocardium. Aim: To investigate tissue remodelling in the infarcted heart following human embryonic stem cell-derived endothelial cell product (hESC-ECP) therapy. Methods: Following coronary artery ligation (CAL) to induce cardiac ischaemia, we investigated infarct size at 1-day post-injection in media-injected controls (CALM, n=11), hESC-ECP-injected mice (CALC, n=10), and dead hESC-ECP-injected mice (CALD, n=6); echocardiography-based functional outcomes 14 days post-injection in experimental (CALM, n=13; CALC, n=17) and SHAM surgical mice (n=4), and mature infarct size (CALM and CALC, both n=6). We investigated ligand receptor interactions (LRIs) in hESC-ECP cell populations, incorporating a publicly available C57BL/6J mouse cardiomyocyte-free scRNAseq dataset with naïve, 1- and 3-day post-CAL hearts. Results: hESC-ECP injection reduces infarct area (CALM: 54.5±5.0%, CALC: 21.3±4.9%), end diastolic (CALM: 87.8±8.9uL, CALC: 63.3±2.7uL) and end systolic ventricular volume (CALM: 56.4±9.3uL, CALC: 33.7±2.6uL). LRI analyses indicate an alternative immunomodulatory effect mediated via viable hESC-ECP-resident signalling. Conclusions: Delivery of the live hESC-ECP following CAL modulates the wound healing response during acute pathological remodelling, reducing infarct area and preserving functional myocardium in this relatively acute model. Potential intrinsic myocardial cellular/hESC-ECP interactions indicate that discreet immunomodulation could provide novel therapeutic avenues to improve cardiac outcomes following myocardial infarction.
Original language | English |
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Journal | Frontiers in Cardiovascular Medicine |
DOIs | |
Publication status | Published - 10 Oct 2022 |
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Assessing the regulation and function of long non-coding RNA LINC00961 in vascular endothelial cell function
1/05/17 → 30/04/20
Project: Research
Equipment
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Edinburgh Preclinical Imaging
Carmel Moran (Manager), Adrian Thomson (Manager), Ross J Lennen (Manager), Adriana Tavares (Manager), Carlos J. Alcaide-Corral (Manager), Tim Morgan (Other), Islay Cranston (Other) & Kerry O'Rourke (Other)
Deanery of Clinical SciencesFacility/equipment: Facility
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Institute for Regeneration and Repair Flow Cytometry Facility
Shonna Johnston (Manager), Fiona Rossi (Manager), Claire Cryer (Other) & Ailsa Laird (Other)
Institute of Regeneration and RepairFacility/equipment: Facility