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• W2103155099 abstract "Age and coronary artery disease may negatively affect the function of human cardiac stem cells (hCSCs) and their potential therapeutic efficacy for autologous cell transplantation in the failing heart.Insulin-like growth factor (IGF)-1, IGF-2, and angiotensin II (Ang II), as well as their receptors, IGF-1R, IGF-2R, and AT1R, were characterized in c-kit(+) hCSCs to establish whether these systems would allow us to separate hCSC classes with different growth reserve in the aging and diseased myocardium.C-kit(+) hCSCs were collected from myocardial samples obtained from 24 patients, 48 to 86 years of age, undergoing elective cardiac surgery for coronary artery disease. The expression of IGF-1R in hCSCs recognized a young cell phenotype defined by long telomeres, high telomerase activity, enhanced cell proliferation, and attenuated apoptosis. In addition to IGF-1, IGF-1R(+) hCSCs secreted IGF-2 that promoted myocyte differentiation. Conversely, the presence of IGF-2R and AT1R, in the absence of IGF-1R, identified senescent hCSCs with impaired growth reserve and increased susceptibility to apoptosis. The ability of IGF-1R(+) hCSCs to regenerate infarcted myocardium was then compared with that of unselected c-kit(+) hCSCs. IGF-1R(+) hCSCs improved cardiomyogenesis and vasculogenesis. Pretreatment of IGF-1R(+) hCSCs with IGF-2 resulted in the formation of more mature myocytes and superior recovery of ventricular structure.hCSCs expressing only IGF-1R synthesize both IGF-1 and IGF-2, which are potent modulators of stem cell replication, commitment to the myocyte lineage, and myocyte differentiation, which points to this hCSC subset as the ideal candidate cell for the management of human heart failure." @default.
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• W2103155099 date "2011-06-10" @default.
• W2103155099 modified "2023-10-16" @default.
• W2103155099 title "Insulin-Like Growth Factor-1 Receptor Identifies a Pool of Human Cardiac Stem Cells With Superior Therapeutic Potential for Myocardial Regeneration" @default.
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• W2103155099 doi "https://doi.org/10.1161/circresaha.111.240648" @default.
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