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Despite the controversy in mechanism, rodent and clinical studies have demonstrated beneficial effects of stem/progenitor cell therapy after myocardial infarction (MI). In a rat ischaemic reperfusion MI model, we investigated the effects of immunomodification of CD 34(+) cells on heart function and myocardial conduction. Bispecific antibody (BiAb), consisting of an anti-myosin light chain antibody and anti-CD45 antibody, injected intravenously was used to direct human CD34(+) cells to injured myocardium. Results were compared to echocardiography guided intramyocardial (IM) injection of CD34(+) cells and PBS injected intravenously. Treatment was administered 2 days post MI. Echocardiography was performed at 5 weeks and 3 months which demonstrated LV dilatation prevention and fractional shortening improvement in both the BiAb and IM injection approaches, with BiAb achieving better results. Histological analyses demonstrated a decrease in infarct size and increase in arteriogenesis in both BiAb and IM injection. Electrophysiological properties were studied 5 weeks after treatments by optical mapping. Conduction velocity (CV), action potential duration (APD) and rise time were significantly altered in the MI area. The BiAb treated group demonstrated a more normalized activation pattern of conduction and normalization of CV at shorter pacing cycle lengths. The ventricular tachycardia inducibility was lowest in the BiAb treatment group. Intravenous administration of BiAb offers an effective means of stem cell delivery for myocardial repair post-acute MI. Such non-invasive approach was shown to offer a distinct advantage to more invasive direct IM delivery.
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http://dx.doi.org/10.1111/jcmm.12439 | DOI Listing |
Catheter Cardiovasc Interv
December 2024
Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, China.
Coronary artery disease (CAD) remains a leading cause of morbidity and mortality worldwide, particularly among complex high-risk and indicated patients (CHIP). Revascularization is often beneficial for these patients; however, it requires thorough risk stratification and close multidisciplinary collaboration between cardiologists and cardiac surgeons to optimize outcomes. Personalized treatment plans, including percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG), are crucial in this context.
View Article and Find Full Text PDFThe quest for bioactives that confer protection against chemotherapy induced cardio toxicity is a front-line area of cardio oncology research. Species of genus Morchella have been used in traditional medicine to treat asthma, wound healing, cough, cold, indigestion, excessive phlegm and breathlessness. M.
View Article and Find Full Text PDFAm J Physiol Heart Circ Physiol
December 2024
Department of Medicine, Division of Cardiology, University of Colorado Anschutz Medical Campus; Aurora, CO, USA.
Bromodomain and extra-terminal domain (BET) proteins, including BRD4, bind acetylated chromatin and co-activate gene transcription. A BET inhibitor, JQ1, prevents and reverses pathological cardiac remodeling in preclinical models of heart failure. However, the underlying cellular mechanisms by which JQ1 improves cardiac structure and function remain poorly defined.
View Article and Find Full Text PDFInt J Cardiol Congenit Heart Dis
December 2024
Division of Structural and Congenital Cardiology, University Hospitals Leuven, Leuven, Belgium.
Background: The Mustard and Senning operations for dextro-transposition of the great arteries (D-TGA) establish a biventricular physiology with a subaortic right ventricle (sRV). While prolonged QRS has been associated with worse prognosis in these patients, current echocardiographic tools fall short in adequately assessing the (mal)performance and function decline of the sRV during follow-up. The present study is the first to characterize Myocardial Work (MW) indices of the sRV in D-TGA patients after Mustard/Senning repair.
View Article and Find Full Text PDFHealth Sci Rep
December 2024
Institute of Medical Sciences, General Hospital of Ningxia Medical University Yinchuan Ningxia China.
Background And Aims: The role of sex disparities in in-hospital outcomes after percutaneous coronary intervention (PCI) for acute myocardial infarction (AMI) in patients with a history of coronary artery bypass grafting (CABG) remains underexplored. This study aimed to identify sex disparities in in-hospital outcomes after PCI in patients with AMI and a history of CABG.
Methods: Using the National Inpatient Sample database, we identified patients hospitalized for AMI with a history of CABG who underwent PCI between 2016 and 2019.
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